Prof. Takao Nakagawa Profile

Prof. Takao Nakagawa

Professor at Institute of Space and Astronautical Science

SPIE Involvement:

Author

Publications (115)

Proceedings Article | 23 August 2024 Poster + Paper

VERTECS: design and development of 6U CubeSat structure for observations of extragalactic background light

Hisataka Kawasaki, Eyoas Ergetu Areda, Hideo Matsuhara, Hirokazu Masui, Kohji Takimoto, Bastien Bernard Andre Morelle, Shuji Matsuura, Takao Nakagawa, Umi Enokidani, Yuki Hirose, Kei Sano

Proceedings Volume 13092, 1309232 (2024) https://doi.org/10.1117/12.3016648

KEYWORDS: Satellites, Vibration, Telescopes, Design

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Proceedings Article | 23 August 2024 Presentation + Paper

Astronomical 6U CubeSat mission VERTECS: scientific objective and project status

Kei Sano, Takao Nakagawa, Shuji Matsuura, Koji Takimoto, Aoi Takahashi, Tetsuhito Fuse, Rodrigo Cordova, Victor Schulz, Pooja Lepcha, Necmi Cihan Örger, Daisuke Nakayama, Joseph Ofosu, Reynel Josue Galindo Rosales, Eyoas Areda, Pema Zangmo, Ezra Fielding, Keenan Chatar, Yukihisa Otani, Hisataka Kawasaki, Bastien Morelle, John Paul Almonte, Shunsuke Nakagawa, Yuto Tome, Shohei Karaki, Chinathip Narongphun, Hari Ram Shrestha, Marco Rosa, David Dai, Wenceslao Bejarano, Akihiro Ikeda, Rin Sato, Kentaro Hayashida, Hiroki Miyagawa, Masahiro Nishioka, Kana Kurosaki, Isami Kato, Satoshi Ikari, Kohji Tsumura, Ichiro Jikuya, Hideo Matsuhara, Umi Enokidani, Hayato Tanaka, Yuki Hirose, Akimasa Ojika, Akane Tsumoto, Taiko Iwaki, Yuki Ohara, Mengu Cho, Kentaro Kitamura, Hirokazu Masui, Mariko Teramoto, Takashi Yamauchi, Ryo Hashimoto, Emino Fukumoto, Zamba Leonel, Arisa Oho, Shoki Yabumoto, Hayato Masuno, Chisato Arakawa, Kouta Miyamoto, Takehiko Wada, Naoki Isobe, Yasuyuki Miyazaki, Ryu Funase, Hajime Kawahara, Keiichi Hirako, Yoichi Yatsu, Yoshihide Aoyanagi

Proceedings Volume 13092, 130920W (2024) https://doi.org/10.1117/12.3014708

KEYWORDS: Satellites, Visible radiation, Galactic astronomy, Stars, Astronomy, Point spread functions, X band, Telescopes, Data transmission

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Proceedings Article | 23 August 2024 Poster + Paper

Attitude and orbital control simulation for VERTECS

Hayato Tanaka, Hideo Matsuhara, Takao Nakagawa, Kohji Takimoto, Aoi Takahashi, Satoshi Ikari, Jose Rodrigo Cordova-Alarcon, Victor Hugo Schulz, Necmi Cihan Orger, Shunsuke Nakagawa, Shuji Matsuura, Kohji Tsumura

Proceedings Volume 13092, 1309231 (2024) https://doi.org/10.1117/12.3019460

KEYWORDS: Satellites, Electron beam lithography, Analog to digital converters, Galactic astronomy, Satellite communications, Control systems, Visible radiation, Stars, Engineering, Optical filters

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Proceedings Article | 23 August 2024 Poster + Paper

VERTECS: operational and power management strategy

Shunsuke Nakagawa, Chinathip Narongphun, Zamba Leonel, Hari Ram Shrestha, Isami Kato, Emino Fukumoto, Rodrigo Cordova, Victor Hugo Schulz, Necmi Cihan Örger, Kei Sano, Takao Nakagawa, Kohji Takimoto, Shuji Matsuura, Kohji Tsumura, Aoi Takahashi, Daisuke Nakayama, Akimasa Ojika, Rin Sato, Keenan Alexsei Aamir Chatar, Yukihisa Otani, Ezra Fielding, Kentaro Hayashida, Hayato Tanaka, Eyoas Ergetu Areda, Bastien Bernard Andre Morelle, Hisataka Kawasaki, Umi Enokidani, Reynel Josué Galindo Rosales, Karaki Shohei, Ichiro Jikuya

Proceedings Volume 13092, 1309233 (2024) https://doi.org/10.1117/12.3017332

KEYWORDS: Astronomy, Extragalactic astronomy, Satellites, Solar cells, Power consumption, Visible radiation, X band, Batteries, Telescopes

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Proceedings Article | 23 August 2024 Presentation + Paper

Concept study of GREX-PLUS: galaxy reionization explorer and planetary universe spectrometer

Akio Inoue, Issei Yamamura, Toyoaki Suzuki, Takao Nakagawa, Hidehiro Kaneda, Hideko Nomura, Tadayuki Kodama, Takehiko Wada, Fumihide Iwamuro, Kentaro Motohara, Yutaka Komiyama, Shinki Oyabu, Yuichi Harikane, Takashi Moriya, Masami Ouchi, Toru Yamada, Shota Notsu

Proceedings Volume 13092, 130920Y (2024) https://doi.org/10.1117/12.3017780

KEYWORDS: Galactic astronomy, Telescopes, Sensors, Spectroscopy, Satellites, James Webb Space Telescope, Space operations, Cooling systems, Mirrors, Equipment

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Proceedings Article | 23 August 2024 Poster + Paper

Development of the CdZnTe immersion grating spectrometer for the detection of snow-lines with high-resolution spectroscopy

Takao Nakagawa, Hideo Matsuhara, Umi Enokidani, Toyoaki Suzuki, Shunsuke Baba, Yasuhiro Hirahara, Hidehiro Kaneda, Ryoichi Koga, Li Yuan, Biao Zhao, Daiki Takama, Hiroshi Sasago, Takehiko Wada, Toshihiro Nakaoka, Taiki Eda, Ryota Kakihara, Yoshinori Shiomitsu, Takuya Hosobata, Noboru Ebizuka, Yutaka Yamagata, Shota Notsu, Hideko Nomura

Proceedings Volume 13092, 130923D (2024) https://doi.org/10.1117/12.3019636

KEYWORDS: Spectroscopy, Crystals, Absorption, Antireflective coatings, Refractive index, Optical gratings, Transmittance, Mid infrared, Cryogenics, Prototyping

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Proceedings Article | 23 August 2024 Poster + Paper

Development of the broadband Fourier transform IR imaging spectrometer with common path wavefront division phase-shift interferometry for compact satellite payload

Biao Zhao, Yasuhiro Hirahara, Yuan Li, Shohei Negishi, Hiroshi Sasago, Yasumasa Kasaba, Ryoichi Koga, Takao Nakagawa, Hideo Matsuhara, Umi Enokidani, Takehiko Wada

Proceedings Volume 13092, 130922X (2024) https://doi.org/10.1117/12.3019640

KEYWORDS: Mirrors, Spectroscopy, FT-IR spectroscopy, Phase interferometry, Phase shifts, Imaging systems, Optical design, Diffraction, Cameras, Infrared imaging

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We have developed a compact broadband infrared imaging Fourier transform spectrometer, referred to as the 2D FTIR, employing common path wavefront division phase-shift interferometry. The system comprises a 3-reflector point-topoint optical setup with overlapping paths, incorporating two free-form mirrors and a pair of 20 mm high and 40 mm wide planar mirrors. Initially, we establish a one-dimensional multi-slit object plane with spacing tailored to match the FPA detector pixel size, effectively preventing destructive interference. Through precise optimization of the parameters of the two free-form mirrors (Mirror 1: 4th-order Zernike polynomial; Mirror 2: 6th-order Zernike polynomial), we achieve precise beam collimation, reflection through a phase shifter, and subsequent refocusing onto the FPA detector. Utilizing a commercial uncooled bolometer camera with a resolution of 640x480 pixels and a pixel size of 17μm, we attain optimal performance across the 4-20μm wavelength range, coupled with a generous 6mm diameter field of view. The spectrometer boasts a remarkable wavenumber resolution of 2.7 cm^-1, with R (λ=4μm) ≈ 1000, alongside a spatial resolution of 34μm. All components seamlessly fit within a 170x150x80 mm vacuum frame. The 2D FT-IR enables the acquisition of spectral maps post-image capture and offers a broad measurement wavelength range of 4-20 μm. After completion of development, we plan to employ it to study the generation mechanisms of cryogenically frozen organic matter simulating Titan's haze and to measure the low-temperature continuous spectral transmittance and refractive index of the GREX-PLUS spectroscopic components. Additionally, due to its high vibration resistance and compact design, we intend to deploy it as a spectrometer for compact satellites developed by JAXA. Lastly, it will serve as a pivotal test instrument for the PLANETS telescope, facilitating the evaluation of the telescope's resistance to atmospheric disturbances.

Proceedings Article | 23 August 2024 Poster + Paper

Transmittance measurement of high-resistivity CdZnTe at cryogenic temperature for material selection of the immersion grating for the next-generation infrared telescope GREX-PLUS

Yuan Li, Yasuhiro Hirahara, Biao Zhao, Hiroshi Sasago, Umi Enokidani, Hideo Matsuhara, Takao Nakagawa, Ryoichi Koga, Takehiko Wada

Proceedings Volume 13092, 130923E (2024) https://doi.org/10.1117/12.3019645

KEYWORDS: Transmittance, Absorption, Temperature metrology, Cryogenics, Lamps, Linear filtering, Refractive index, Mid infrared, Infrared radiation, Signal intensity

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Proceedings Article | 23 August 2024 Poster + Paper

Development of a mid-infrared refractive index measurement system at cryogenic temperature for the development of an immersion grating to be onboard next-generation infrared space telescope GREX-PLUS

Umi Enokidani, Hideo Matsuhara, Takao Nakagawa, Yasuhiro Hirahara, Ryoichi Koga, Yuan Li, Biao Zhao, Daiki Takama, Hiroshi Sasago, Takehiko Wada

Proceedings Volume 13092, 130923F (2024) https://doi.org/10.1117/12.3019753

KEYWORDS: Refractive index, Temperature metrology, Infrared radiation, Angle measurement, Prisms, Infrared telescopes, Cryogenics, Spectrographs, Mid infrared, Optical testing

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Proceedings Article | 23 August 2024 Presentation + Paper

VERTECS: development status of the mission payload specialized in visible EBL observation

Kohji Takimoto, Yuki Hirose, Taiko Iwaki, Hisataka Kawasaki, Shuji Matsuura, Shunsuke Nakagawa, Takao Nakagawa, Akimasa Ojika, Rin Sato, Aoi Takahashi, Yuto Tome, Akane Tsumoto, Kohji Tsumura, Kei Sano

Proceedings Volume 13092, 130920X (2024) https://doi.org/10.1117/12.3016614

KEYWORDS: Astronomical imaging, Astronomical telescopes, Observational astronomy, Astronomical instrumentation, Telescopes, Baffles, Satellites, Optical filters

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Proceedings Article | 23 August 2024 Presentation + Paper

VERTECS: thermal modeling and analysis to enhance mission efficiency through temperature control strategies of a 6U CubeSat with visible light telescope

Reynel Josué Galindo Rosales, Hisataka Kawasaki, Shohei Karaki, Marco Rosa, Ezra Fielding, Keenan Chatar, Shuji Matsuura, Yuki Hirose, Hirokazu Masui, Kei Sano, Takao Nakagawa, Mengu Cho

Proceedings Volume 13099, 1309910 (2024) https://doi.org/10.1117/12.3018823

KEYWORDS: Satellites, Telescopes, CMOS sensors, Thermal modeling, Visible radiation, Vacuum chambers, Vacuum, Cameras, Thermal effects, Device simulation

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SPIE Journal Paper | 23 June 2022 Open Access

Simulations of the spectral resolving power of a compact space-borne immersion-echelle spectrometer using mid-infrared wave tracing

Satoshi Itoh, Daisuke Ishihara, Takehiko Wada, Takao Nakagawa, Shinki Oyabu, Hidehiro Kaneda, Yasuhiro Hirahara, The SMI Consortium

JATIS, Vol. 8, Issue 02, 025004, (June 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.2.025004

KEYWORDS: Spectral resolution, Diffraction gratings, Diffraction, Spectroscopy, Monochromatic aberrations, Point spread functions, Geometrical optics, Mid-IR, Telescopes, Optical aberrations

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Proceedings Article | 15 December 2020 Presentation + Paper

Mechanical cooler system for the infrared space mission SPICA

Keisuke Shinozaki, Yoichi Sato, Chihiro Tokoku, Masaru Saijo, Hiroyuki Ogawa, Takao Nakagawa, Kenichiro Sawada, Hiroyuki Sugita, Tadahito Mizutani, Hideo Matsuhara, Shoji Tsunematsu, Seiji Yoshida, Kenichi Kanao, Akinobu Okabayashi, Katsuhiro Narasaki, Hiroshi Shibai

Proceedings Volume 11443, 1144329 (2020) https://doi.org/10.1117/12.2562175

KEYWORDS: Space operations, Infrared imaging, Infrared radiation, Infrared telescopes, Cryogenics, Telescopes, Space telescopes, Astrophysics, Cooling systems, Failure analysis

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Proceedings Article | 13 December 2020 Presentation + Paper

Cryogenic system of the infrared space mission SPICA

Takao Nakagawa, Ken Goto, Hidehiro Kaneda, Hideo Matsuhara, Jun Matsumoto, Tadahito Mizutani, Hiroyuki Ogawa, Masaru Saijo, Yoichi Sato, Kenichiro Sawada, Hiroshi Shibai, Keisuke Shinozaki, Hiroyuki Sugita, Shinsuke Takeuchi, Chihiro Tokoku, Thierry Tirolien, Hideki Uchida

Proceedings Volume 11443, 1144328 (2020) https://doi.org/10.1117/12.2561882

KEYWORDS: Cryogenics, Infrared radiation, Space operations, Infrared imaging, Cryocoolers, Telescopes, Cooling systems, Sensors

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Proceedings Article | 13 December 2020 Paper

The 2020 SPICA telescope preliminary design and predicted performance

Julien Archer, Dominic Doyle, Joel Boyadjian, Lucas Courcoult Mifsud, Anouck Paoletti, Rémi Pujol, Didier Castel, Stéphane Iugovich, Thierry Blais, Jan Tauber, Jacques Rouquet, Hideo Matsuhara, Hidehiro Kaneda, Takao Nakagawa

Proceedings Volume 11443, 1144327 (2020) https://doi.org/10.1117/12.2561626

KEYWORDS: Telescopes, Optical design, Optical instrument design, Defense and security, Space operations

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Proceedings Article | 13 December 2020 Presentation

The joint infrared space observatory SPICA: unveiling the obscured universe

Peter Roelfsema, Hiroshi Shibai, Hidehiro Kaneda, Marc Sauvage, Martin Giard, Francisco Najarro, Charles Bradford, Toru Yamada, Jan Tauber, Marc Audard, Pieter Dieleman, Yasuo Doi, David Elbaz, Matt Griffin, Frank Helmich, Astrid Heske, Mitsuhiko Honda, Willem Jellema, Shoko Jin, Mika Juvela, Inga Kamp, Franz Kerschbaum, Csaba Kiss, Kotaro Kohno, Oliver Krause, Gert de Lange, Bengt Larsson, Jesus Martin-Pintado, Hideo Matsuhara, Takao Nakagawa, Tohru Nagao, David Naylor, Hideko Nomura, Hiroyuki Ogawa, Takashi Onaka, Jacques Rouquet, Luigi Spinoglio, Ryszard Szczerba, Floris van der Tak, Bart Vandenbussche, Shiang-Yu Wang, Stafford Withington

Proceedings Volume 11443, 1144325 (2020) https://doi.org/10.1117/12.2562946

KEYWORDS: Infrared Space Observatory, Sensors, Telescopes, Spectroscopes, Imaging systems, Liquids, Cryogenics, Observatories, Ions, Molecules

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Proceedings Article | 13 December 2020 Poster + Paper

SPICA Mid-infrared Instrument (SMI): The latest design and specifications

Takehiko Wada, Hidehiro Kaneda, Takuma Kokusho, Toyoaki Suzuki, Kumiko Morihana, Takurou Tsuchikawa, Yuki Kuroda, Daichi Ishikawa, Shinki Oyabu, Naoki Isobe, Daisuke Ishihara, Hideo Matsuhara, Koichi Nagase, Takao Nakagawa, Takafumi Ootsubo, Mitsuyoshi Yamagishi, Hiroshi Maeshima, Shunsuke Onishi, Kosei Matsumoto, Satoshi Itoh, Mizuho Uchiyama, Ryan Lau, Hiromichi Ebihara, Hanae Inami, Koji Kawabata, Yasumasa Kasaba, Takeshi Sakanoi, Yoshifusa Ita, Masayuki Akiyama, Itsuki Sakon, Takafumi Kamizuka, Takashi Miyata, Kohji Tsumura, Masato Naruse, Youichi Ohyama, Shiang-Yu Wang, Hiroshi Shibai

Proceedings Volume 11443, 114436G (2020) https://doi.org/10.1117/12.2561157

KEYWORDS: Spectroscopy, Mid-IR, Cameras, Sensors, Galactic astronomy, James Webb Space Telescope, Spectroscopes, Content addressable memory, Prisms, Imaging systems

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Transmittance measurement of low/high-resistivity of CdZnTe at cryogenic temperature for material selection of the immersion grating of SPICA SMI

Hiroshi Maeshima, Kosei Matsumoto, Yasuhiro Hirahara, Takao Nakagawa, Takehiko Wada, Koichi Nagase, Shinki Oyabu, Toyoaki Suzuki, Takuma Kokusho, Hidehiro Kaneda, Ryota Ito, Daichi Ishikawa

Proceedings Volume 11451, 114515X (2020) https://doi.org/10.1117/12.2562042

KEYWORDS: Transmittance, Cryogenics, Absorbance, Temperature metrology, Diffraction gratings, Mid-IR, Liquids, Helium, FT-IR spectroscopy, Optical testing

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Proceedings Article | 24 July 2018 Presentation + Paper

Thermal and mechanical design of SPICA payload module

Hiroyuki Ogawa, Takao Nakagawa, Hideo Matsuhara, Chihiro Tokoku, Mitsunobu Kawada, Ken Goto, Shinsuke Takeuchi, Masaru Saijo, Keisuke Shinozaki, Yohichi Sato, Tadahito Mizutani, Hidehiro Kaneda, Hiroshi Shibai

Proceedings Volume 10698, 106980B (2018) https://doi.org/10.1117/12.2313308

KEYWORDS: Space telescopes, Telescopes, Mechanical engineering, Space operations, Cryogenics, Curium, Sensors, Cooling systems, Assembly equipment, Optical instrument design

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Proceedings Article | 12 July 2018 Paper

SPICA mid-infrared instrument (SMI): conceptual design and feasibility studies

Hidehiro Kaneda, Daisuke Ishihara, Shinki Oyabu, Misato Fukagawa, Takuma Kokusho, Toyoaki Suzuki, Takuya Furuta, Takurou Tsuchikawa, Takehiko Wada, Naoki Isobe, Mitsunobu Kawada, Jungmi Kwon, Hideo Matsuhara, Koichi Nagase, Takao Nakagawa, Takafumi Ootsubo, Mitsuyoshi Yamagishi, Itsuki Sakon, Kohji Tsumura, Hiroshi Shibai

Proceedings Volume 10698, 106980C (2018) https://doi.org/10.1117/12.2313093

KEYWORDS: Sensors, Spectroscopy, Mirrors, Galactic astronomy, Annealing, Mid-IR, Space telescopes, Telescopes, Infrared telescopes, Spectroscopes

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Proceedings Article | 10 July 2018 Presentation

SPICA: a joint infrared space observatory (Conference Presentation)

Peter Roelfsema, Hiroshi Shibai, Kees Wafelbakker, Gert de Lange, Martin Giard, Francisco Najarro, Marc Audard, Lee Armus, Charles Bradford, Yasuo Doi, Matt Griffin, Frank Helmich, Inga Kamp, Hidehiro Kaneda, Ciska Kemper, Franz Kerschbaum, Kotaro Kohno, Oliver Krause, Bengt Larsson, Sue Madden, Hideo Matsuhara, Takao Nakagawa, David Naylor, Hiroyuki Ogawa, Takashi Onaka, Luigi Spinoglio, Floris van der Tak, Bart Vandenbussche, Toru Yamada

Proceedings Volume 10698, 106980A (2018) https://doi.org/10.1117/12.2313124

KEYWORDS: Space telescopes, Telescopes, Infrared Space Observatory, Planetary systems, Infrared radiation, Infrared telescopes, Galaxy evolution, Sensors, Cryogenics, Spectroscopes

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Measurements in the infrared wavelength domain allow us to assess directly the physical state and energy balance of cool matter in space, thus enabling the detailed study of the various processes that govern the formation and early evolution of stars and planetary systems in the Milky Way and of galaxies over cosmic time. Previous infrared missions, from IRAS to Herschel, have revealed a great deal about the obscured Universe, but sensitivity has been limited because up to now it has not been possible to fly a telescope that is both large and cold. Such a facility is essential to address key astrophysical questions, especially concerning galaxy evolution and the development of planetary systems. SPICA is a mission concept aimed at taking the next step in mid- and far-infrared observational capability by combining a large and cold telescope with instruments employing state-of-the-art ultra-sensitive detectors. The mission concept foresees a 2.5-meter diameter telescope cooled to below 8 K. Rather than using liquid cryogen, a combination of passive cooling and mechanical coolers will be used to cool both the telescope and the instruments. With cooling not dependent on a limited cryogen supply, the mission lifetime can extend significantly beyond the required three years. The combination of low telescope background and instruments with state-of-the-art detectors means that SPICA can provide a huge advance on the capabilities of previous missions. The SPICA instrument complement offers spectral resolving power ranging from ~50 through 11000 in the 17-230 µm domain as well as ~28.000 spectroscopy between 12 and 18 µm. Additionally, SPICA will be capable of efficient 30-37 µm broad band mapping, and small field spectroscopic and polarimetric imaging in the 100-350 µm range. SPICA will enable far infrared spectroscopy with an unprecedented sensitivity of ~5x10-20 W/m2 (5σ/1hr) - at least two orders of magnitude improvement over what has been attained to date. With this exceptional leap in performance, new domains in infrared astronomy will become accessible, allowing us, for example, to unravel definitively galaxy evolution and metal production over cosmic time, to study dust formation and evolution from very early epochs onwards, and to trace the formation history of planetary systems.

Proceedings Article | 13 April 2018 Paper

Telescope system of the Space Infrared telescope for cosmology and astrophysics (SPICA) mission

Takashi Onaka, Takao Nakagawa, Toshio Matsumoto, Hiroshi Murakami, Hideo Matsuhara, Hirokazu Kataza, Hidehiro Kaneda, Keigo Enya, Yukari Yui, Motohide Tamura

Proceedings Volume 10568, 105682B (2018) https://doi.org/10.1117/12.2500106

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SPIE Journal Paper | 13 March 2018 Open Access

Hitomi (ASTRO-H) X-ray Astronomy Satellite

Tadayuki Takahashi, Motohide Kokubun, Kazuhisa Mitsuda, Richard Kelley, Takaya Ohashi, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steven Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Magnus Axelsson, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Marshall Bautz, Thomas Bialas, Roger Blandford, Kevin Boyce, Laura Brenneman, Gregory Brown, Esra Bulbul, Edward Cackett, Edgar Canavan, Maria Chernyakova, Meng Chiao, Paolo Coppi, Elisa Costantini, Stephen O’ Dell, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Megan E. Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Kirk Gilmore, Margherita Giustini, Andrea Goldwurm, Liyi Gu, Matteo Guainazzi, Daniel Haas, Yoshito Haba, Kouichi Hagino, Kenji Hamaguchi, Ilana Harrus, Isamu Hatsukade, Takayuki Hayashi, Katsuhiro Hayashi, Kiyoshi Hayashida, Jan-Willem den Herder, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Yuto Ichinohe, Ryo Iizuka, Hajime Inoue, Yoshiyuki Inoue, Kazunori Ishibashi, Manabu Ishida, Kumi Ishikawa, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Itoh, Masachika Iwai, Naoko Iwata, Naoko Iyomoto, Christopher Jewell, Jelle Kaastra, Timothy Kallman, Tsuneyoshi Kamae, Erin Kara, Jun Kataoka, Satoru Katsuda, Junichiro Katsuta, Madoka Kawaharada, Nobuyuki Kawai, Taro Kawano, Shigeo Kawasaki, Dmitry Khangulyan, Caroline Kilbourne, Mark Kimball, Ashley King, Takao Kitaguchi, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Saori Konami, Tatsuro Kosaka, Alexander Koujelev, Katsuji Koyama, Shu Koyama, Peter Kretschmar, Hans Krimm, Aya Kubota, Hideyo Kunieda, Philippe Laurent, Shiu-Hang Lee, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb, Grzegorz Madejski, Yoshitomo Maeda, Daniel Maier, Kazuo Makishima, Maxim Markevitch, Candace Masters, Hironori Matsumoto, Kyoko Matsushita, Daniel McCammon, Daniel McGuinness, Brian McNamara, Missagh Mehdipour, Joseph Miko, Eric Miller, Jon Miller, Shin Mineshige, Kenji Minesugi, Ikuyuki Mitsuishi, Takuya Miyazawa, Tsunefumi Mizuno, Hideyuki Mori, Koji Mori, Franco Moroso, Samuel Moseley, Theodore Muench, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Hosei Nagano, Ryo Nagino, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Toshio Nakano, Shinya Nakashima, Kazuhiro Nakazawa, Yoshiharu Namba, Chikara Natsukari, Yusuke Nishioka, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Masaharu Nomachi, Hirokazu Odaka, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Atsushi Okamoto, Tsuyoshi Okazaki, Naomi Ota, Masanobu Ozaki, Frederik B. Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Ciro Pinto, Jelle de Plaa, Martin Pohl, James Pontius, Frederick Porter, Katja Pottschmidt, Brian Ramsey, Christopher Reynolds, Helen Russell, Samar Safi-Harb, Shinya Saito, Kazuhiro Sakai, Shin-ichiro Sakai, Hiroaki Sameshima, Toru Sasaki, Goro Sato, Kosuke Sato, Rie Sato, Yoichi Sato, Makoto Sawada, Norbert Schartel, Peter Serlemitsos, Hiromi Seta, Yasuko Shibano, Maki Shida, Megumi Shidatsu, Takanobu Shimada, Keisuke Shinozaki, Peter Shirron, Aurora Simionescu, Cynthia Simmons, Randall Smith, Gary Sneiderman, Yang Soong, Łukasz Stawarz, Yasuharu Sugawara, Satoshi Sugita, Hiroyuki Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Shin'ichiro Takeda, Yoh Takei, Toru Tamagawa, Takayuki Tamura, Keisuke Tamura, Takaaki Tanaka, Yasuo Tanaka, Yasuyuki Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Go Tsuru, Hiroyuki Uchida, Hideki Uchiyama, Yasunobu Uchiyama, Shutaro Ueda, Yoshihiro Ueda, Shiro Ueno, Shin’ichiro Uno, C. Megan Urry, Eugenio Ursino, Cor de Vries, Atsushi Wada, Shin Watanabe, Tomomi Watanabe, Norbert Werner, Daniel R. Wik, Dan R. Wilkins, Brian J. Williams, Shinya Yamada, Takahiro Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Y. Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida, Takayuki Yuasa, Irina Zhuravleva, Abderahmen Zoghbi

JATIS, Vol. 4, Issue 02, 021402, (March 2018) https://doi.org/10.1117/12.10.1117/1.JATIS.4.2.021402

KEYWORDS: Sensors, X-ray astronomy, Satellites, Physics, X-rays, Space operations, Aerospace engineering, Astronomy, Space telescopes, X-ray telescopes

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Proceedings Article | 11 January 2018 Open Access

The SPICA Telescope: design evolution and expected performance

L. Gaspar Venancio, D. Doyle, K. Isaak, T. Onaka, H. Kaneda, T. Nakagawa, H. Matsuhara, N. Takahashi, T. Yamawaki

Proceedings Volume 10565, 1056555 (2018) https://doi.org/10.1117/12.2309162

KEYWORDS: Mirrors, Computer aided design, Space telescopes, Telescopes, Optical instrument design, Optical design, Point spread functions, Astronomical imaging, Diffraction, Optics manufacturing

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Proceedings Article | 21 November 2017 Open Access

Performance of lightweight large C/SiC mirror

Yukari Yui, Ken Goto, Hidehiro Kaneda, Haruyoshi Katayama, Masaki Kotani, Masashi Miyamoto, Masataka Naitoh, Takao Nakagawa, Hideki Saruwatari, Masahiro Suganuma, Hiroyuki Sugita, Yoshio Tange, Shin Utsunomiya, Yasuji Yamamoto, Toshihiko Yamawaki

Proceedings Volume 10566, 105660M (2017) https://doi.org/10.1117/12.2308191

KEYWORDS: Mirrors, Optics manufacturing, Cryogenics, Optical testing, Silicon carbide, Lightweight mirrors, Surface finishing, Polishing, Interfaces, Carbon

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Proceedings Article | 21 November 2017 Open Access

Cryogenic optical testing of sic mirrors for ASTRO-F and C/SiC composite mirrors for SPICA

Hidehiro Kaneda, Takao Nakagawa, Keigo Enya, Takashi Onaka

Proceedings Volume 10568, 105681H (2017) https://doi.org/10.1117/12.2308002

KEYWORDS: Mirrors, Silicon carbide, Telescopes, Cryogenics, Composites, Temperature metrology, Surface finishing, Optical testing, Space telescopes, Chemical vapor deposition

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Proceedings Article | 20 November 2017 Open Access

Optical testing of lightweight large all-C/SiC optics

M. Suganuma, T. Imai, H. Katayama, M. Naitoh, Y. Tange, Y. Yui, K. Maruyama, H. Kaneda, T. Nakagawa, M. Kotani

Proceedings Volume 10565, 105652E (2017) https://doi.org/10.1117/12.2309218

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Proceedings Article | 17 November 2017 Open Access

Spica-Safari reference optical design

Carmen Pastor, Pablo Zuluaga, Willem Jellema, Luis Miguel González Fernández, Tomas Belenguer, Josefina Torres Redondo, Peter Paul Kooijman, Francisco Najarro, Martin Eggens, Peter Roelfsema, Takao Nakagawa

Proceedings Volume 10563, 105634K (2017) https://doi.org/10.1117/12.2304183

KEYWORDS: Mirrors, Fourier transforms, Optical design, Interferometers, Space telescopes, Telescopes, Diffraction, Cameras, Image transmission, Interfaces

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Proceedings Article | 5 September 2017 Presentation + Paper

Quality evaluation of spaceborne SiC mirrors: the effects on mirror accuracy by variation in the thermal expansion property of the mirror surface

Masaki Kotani, Tadashi Imai, Haruyoshi Katayama, Hidehiro Kaneda, Takao Nakagawa, Keigo Enya

Proceedings Volume 10372, 103720F (2017) https://doi.org/10.1117/12.2273703

KEYWORDS: Mirrors, Finite element methods, Silicon carbide, Ceramics, Data modeling, Lightweight mirrors, Astronomy, Prototyping, Thermal modeling, Computer simulations

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Proceedings Article | 29 July 2016 Paper

SPICA Mid-infrared Instrument (SMI): technical concepts and scientific capabilities

Hidehiro Kaneda, Daisuke Ishihara, Shinki Oyabu, Mitsuyoshi Yamagishi, Takehiko Wada, Mitsunobu Kawada, Naoki Isobe, Kentaroh Asano, Toyoaki Suzuki, Takao Nakagawa, Hideo Matsuhara, Itsuki Sakon, Kohji Tsumura, Hiroshi Shibai, Taro Matsuo

Proceedings Volume 9904, 99042I (2016) https://doi.org/10.1117/12.2232442

KEYWORDS: Spectroscopy, Telescopes, Spectroscopes, Mid-IR, Mirrors, Lawrencium, Sensors, Spectral resolution, Galactic astronomy, Cameras

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Proceedings Article | 29 July 2016 Paper

Mechanical cooler system for the next-generation infrared space telescope SPICA

Keisuke Shinozaki, Hiroyuki Ogawa, Takao Nakagawa, Yoichi Sato, Hiroyuki Sugita, Toshihiko Yamawaki, Tadahito Mizutani, Hideo Matsuhara, Mitsunobu Kawada, Akinobu Okabayashi, Shoji Tsunematsu, Katsuhiro Narasaki, Hiroshi Shibai

Proceedings Volume 9904, 99043W (2016) https://doi.org/10.1117/12.2232602

KEYWORDS: Infrared telescopes, Space telescopes, Telescopes, Optical instrument design, Cryogenics, Infrared radiation, Cooling systems, Space telescopes, Cryogenics, Electrical breakdown, James Webb Space Telescope, Space operations

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Proceedings Article | 29 July 2016 Paper

New cryogenic system of the next-generation infrared astronomy mission SPICA

H. Ogawa, T. Nakagawa, H. Matsuhara, K. Shinozaki, K. Goto, N. Isobe, M. Kawada, T. Mizutani, Y. Sato, H. Sugita, S. Takeuchi, T. Yamawaki, H. Shibai

Proceedings Volume 9904, 99042H (2016) https://doi.org/10.1117/12.2231613

KEYWORDS: Space telescopes, Telescopes, Cryogenics, Cryocoolers, Infrared astronomy, Optical instrument design, Infrared telescopes, Infrared astronomy, Curium, Aluminum, Space operations

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Proceedings Article | 20 July 2016 Paper

The ASTRO-H (Hitomi) x-ray astronomy satellite

Tadayuki Takahashi, Motohide Kokubun, Kazuhisa Mitsuda, Richard Kelley, Takaya Ohashi, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Magnus Axelsson, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Marshall Bautz, Thomas Bialas, Roger Blandford, Kevin Boyce, Laura Brenneman, Greg Brown, Esra Bulbul, Edward Cackett, Edgar Canavan, Maria Chernyakova, Meng Chiao, Paolo Coppi, Elisa Costantini, Jelle de Plaa, Jan-Willem den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Megan Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Kirk Gilmore, Margherita Giustini, Andrea Goldwurm, Liyi Gu, Matteo Guainazzi, Daniel Haas, Yoshito Haba, Kouichi Hagino, Kenji Hamaguchi, Atsushi Harayama, Ilana Harrus, Isamu Hatsukade, Takayuki Hayashi, Katsuhiro Hayashi, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Yuto Ichinohe, Ryo Iizuka, Yoshiyuki Inoue, Hajime Inoue, Kazunori Ishibashi, Manabu Ishida, Kumi Ishikawa, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Itoh, Naoko Iwata, Naoko Iyomoto, Chris Jewell, Jelle Kaastra, Timothy Kallman, Tuneyoshi Kamae, Erin Kara, Jun Kataoka, Satoru Katsuda, Junichiro Katsuta, Madoka Kawaharada, Nobuyuki Kawai, Taro Kawano, Shigeo Kawasaki, Dmitry Khangulyan, Caroline Kilbourne, Mark Kimball, Ashley King, Takao Kitaguchi, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Tatsuro Kosaka, Alex Koujelev, Katsuji Koyama, Shu Koyama, Peter Kretschmar, Hans Krimm, Aya Kubota, Hideyo Kunieda, Philippe Laurent, François Lebrun, Shiu-Huang Lee, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb, Grzegorz Madejski, Yoshitomo Maeda, Daniel Maier, Kazuo Makishima, Maxim Markevitch, Candace Masters, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Daniel McGuinness, Brian McNamara, Missagh Mehdipour, Joseph Miko, Jon Miller, Eric Miller, Shin Mineshige, Kenji Minesugi, Ikuyuki Mitsuishi, Takuya Miyazawa, Tsunefumi Mizuno, Koji Mori, Hideyuki Mori, Franco Moroso, Harvey Moseley, Theodore Muench, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Housei Nagano, Ryo Nagino, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Toshio Nakano, Shinya Nakashima, Kazuhiro Nakazawa, Yoshiharu Namba, Chikara Natsukari, Yusuke Nishioka, Masayoshi Nobukawa, Kumiko Nobukawa, Hirofumi Noda, Masaharu Nomachi, Steve O'Dell, Hirokazu Odaka, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Atsushi Okamoto, Tsuyoshi Okazaki, Naomi Ota, Masanobu Ozaki, Frederik Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Ciro Pinto, Martin Pohl, James Pontius, F. Scott Porter, Katja Pottschmidt, Brian Ramsey, Christopher Reynolds, Helen Russell, Samar Safi-Harb, Shinya Saito, Shin-ichiro Sakai, Kazuhiro Sakai, Hiroaki Sameshima, Toru Sasaki, Goro Sato, Yoichi Sato, Kosuke Sato, Rie Sato, Makoto Sawada, Norbert Schartel, Peter Serlemitsos, Hiromi Seta, Yasuko Shibano, Maki Shida, Megumi Shidatsu, Takanobu Shimada, Keisuke Shinozaki, Peter Shirron, Aurora Simionescu, Cynthia Simmons, Randall Smith, Gary Sneiderman, Yang Soong, Łukasz Stawarz, Yasuharu Sugawara, Hiroyuki Sugita, Satoshi Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Shin'ichiro Takeda, Yoh Takei, Toru Tamagawa, Takayuki Tamura, Keisuke Tamura, Takaaki Tanaka, Yasuo Tanaka, Yasuyuki Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Yasunobu Uchiyama, Hideki Uchiyama, Yoshihiro Ueda, Shutaro Ueda, Shiro Ueno, Shin'ichiro Uno, Meg Urry, Eugenio Ursino, Cor de Vries, Atsushi Wada, Shin Watanabe, Tomomi Watanabe, Norbert Werner, Daniel Wik, Dan Wilkins, Brian Williams, Takahiro Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida, Takayuki Yuasa, Irina Zhuravleva, Abderahmen Zoghbi

Proceedings Volume 9905, 99050U (2016) https://doi.org/10.1117/12.2232379

KEYWORDS: X-rays, X-ray astronomy, Sensors, Satellites, X-ray telescopes, Space operations, Physics, Space telescopes, Aerospace engineering, Calibration

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Proceedings Article | 17 May 2016 Paper

Overview of Sumitomo coolers and Dewars for space use

Kenichi Kanao, Katsuhiro Narasaki, Shoji Tsunematsu, Kiyomi Ootsuka, Akinobu Okabayashi, Kazuhisa Mitsuda, Hiroshi Murakami, Takao Nakagawa, Toshiyuki Nishibori, Ken'ichi Kikuchi, Ryota Sato, Hiroyuki Sugita, Yoichi Sato, Masahide Murakami

Proceedings Volume 9821, 98210C (2016) https://doi.org/10.1117/12.2223514

KEYWORDS: Aerospace engineering, Astronomy, Satellites, X-ray astronomy, X-rays, Temperature metrology, Prototyping, Helium, Photography, Sensors

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SPIE Journal Paper | 15 April 2015

Preliminary structural design and key technology demonstration of cryogenic assembly in the next-generation infrared space telescope SPICA

Tadahito Mizutani, Toshihiko Yamawaki, Keiji Komatsu, Ken Goto, Shinsuke Takeuchi, Keisuke Shinozaki, Hideo Matsuhara, Takao Nakagawa

JATIS, Vol. 1, Issue 02, 027001, (April 2015) https://doi.org/10.1117/12.10.1117/1.JATIS.1.2.027001

KEYWORDS: Space telescopes, Cryogenics, Space operations, Infrared telescopes, Structural design, Telescopes, Infrared radiation, Aerospace engineering, Cryocoolers, Temperature metrology

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Proceedings Article | 28 August 2014 Paper

Thermal study of payload module for the next-generation infrared space telescope SPICA in risk mitigation phase

Keisuke Shinozaki, Yoichi Sato, Kenichiro Sawada, Makiko Ando, Hiroyuki Sugita, Toshihiko Yamawaki, Tadahito Mizutani, Keiji Komatsu, Shun Okazaki, Hiroyuki Ogawa, Takao Nakagawa, Hideo Matsuhara, Makoto Takada, Akinobu Okabayashi, Shoji Tsunematsu, Katsuhiro Narasaki

Proceedings Volume 9143, 914349 (2014) https://doi.org/10.1117/12.2056650

KEYWORDS: Space telescopes, Telescopes, Infrared telescopes, Structural design, Thermal modeling, Cryogenics, Switches, Infrared radiation, James Webb Space Telescope, Optical instrument design

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Proceedings Article | 28 August 2014 Paper

Precision pointing control for SPICA: risk mitigation phase study

Shinji Mitani, Yasuhiro Kawakatsu, Shin-ichiro Sakai, Naomi Murakami, Toshihiko Yamawaki, Tadahito Mizutani, Keiji Komatsu, Hirokazu Kataza, Keigo Enya, Takao Nakagawa

Proceedings Volume 9143, 914347 (2014) https://doi.org/10.1117/12.2055864

KEYWORDS: Optical isolators, Space telescopes, Cryocoolers, Mirrors, Cryogenics, Temperature metrology, Telescopes, Finite element methods, Sensors, Astronomy

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Proceedings Article | 28 August 2014 Paper

Contamination control for the space infrared observatory SPICA

Naoki Isobe, Takao Nakagawa, Shun Okazaki, Yoichi Sato, Makiko Ando, Susumu Baba, Yuka Miura, Eiji Miyazaki, Yugo Kimoto, Junichiro Ishizawa, Hiroumi Tani, Kenta Maruyama, Fumitaka Urayama, Akihito Mori

Proceedings Volume 9143, 914348 (2014) https://doi.org/10.1117/12.2056009

KEYWORDS: Contamination, Space telescopes, Telescopes, Mirrors, Space operations, Contamination control, Molecules, Infrared radiation, Observatories, Aerospace engineering

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Proceedings Article | 28 August 2014 Paper

The optical design of a far infrared imaging FTS for SPICA

Proceedings Volume 9143, 91434B (2014) https://doi.org/10.1117/12.2056791

KEYWORDS: Mirrors, Fourier transforms, Interferometers, Optical design, Telescopes, Cameras, Space telescopes, Diffraction, Far infrared, Image transmission

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Proceedings Article | 2 August 2014 Paper

The next-generation infrared astronomy mission SPICA under the new framework

Takao Nakagawa, Hiroshi Shibai, Takashi Onaka, Hideo Matsuhara, Hidehiro Kaneda, Yasuhiro Kawakatsu, Peter Roelfsema

Proceedings Volume 9143, 91431I (2014) https://doi.org/10.1117/12.2055947

KEYWORDS: Galactic astronomy, Planets, Telescopes, Space telescopes, Stars, Mid-IR, Infrared astronomy, Astronomy, Infrared telescopes, Spectroscopy

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Proceedings Article | 28 July 2014 Paper

Development of high-throughput silicon lens and grism with moth-eye anti-reflection structure

Takafumi Kamizuka, Takashi Miyata, Shigeyuki Sako, Hiroaki Imada, Ryou Ohsawa, Kentaro Asano, Mizuho Uchiyama, Kazushi Okada, Masahito Uchiyama, Takehiko Wada, Takao Nakagawa, Tomohiko Nakamura, Itsuki Sakon, Takashi Onaka

Proceedings Volume 9151, 91515G (2014) https://doi.org/10.1117/12.2055756

KEYWORDS: Antireflective coatings, Silicon, Coating, Transmittance, Mid-IR, Signal detection, Imaging systems, Astronomy, Cryogenics, Lithography

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Proceedings Article | 24 July 2014 Paper

The ASTRO-H X-ray astronomy satellite

Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Marshall Bautz, Thomas Bialas, Roger Blandford, Kevin Boyce, Laura Brenneman, Gregory Brown, Ed Cackett, Edgar Canavan, Maria Chernyakova, Meng Chiao, Paolo Coppi, Elisa Costantini, Jelle de Plaa, Jan-Willem den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Kirk Gilmore, Matteo Guainazzi, Daniel Haas, Yoshito Haba, Kenji Hamaguchi, Atsushi Harayama, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Una Hwang, Ryo Iizuka, Yoshiyuki Inoue, Kazunori Ishibashi, Manabu Ishida, Kumi Ishikawa, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Itoh, Naoko Iwata, Naoko Iyomoto, Chris Jewell, Jelle Kaastra, Timothy Kallman, Tuneyoshi Kamae, Jun Kataoka, Satoru Katsuda, Junichiro Katsuta, Madoka Kawaharada, Nobuyuki Kawai, Taro Kawano, Shigeo Kawasaki, Dmitry Khangaluyan, Caroline Kilbourne, Mark Kimball, Masashi Kimura, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Saori Konami, Tatsuro Kosaka, Alexander Koujelev, Katsuji Koyama, Hans Krimm, Aya Kubota, Hideyo Kunieda, Stephanie LaMassa, Philippe Laurent, François Lebrun, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb, Grzegorz Madejski, Yoshitomo Maeda, Kazuo Makishima, Maxim Markevitch, Candace Masters, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Daniel McGuinness, Brian McNamara, Joseph Miko, Jon Miller, Eric Miller, Shin Mineshige, Kenji Minesugi, Ikuyuki Mitsuishi, Takuya Miyazawa, Tsunefumi Mizuno, Koji Mori, Hideyuki Mori, Franco Moroso, Theodore Muench, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Housei Nagano, Ryo Nagino, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Shinya Nakashima, Kazuhiro Nakazawa, Yoshiharu Namba, Chikara Natsukari, Yusuke Nishioka, Masayoshi Nobukawa, Hirofumi Noda, Masaharu Nomachi, Steve O'Dell, Hirokazu Odaka, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Takaya Ohashi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Tsuyoshi Okazaki, Naomi Ota, Masanobu Ozaki, Frits Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Ciro Pinto, Martin Pohl, James Pontius, F. Porter, Katja Pottschmidt, Brian Ramsey, Rubens Reis, Christopher Reynolds, Claudio Ricci, Helena Russell, Samar Safi-Harb, Shinya Saito, Shin-ichiro Sakai, Hiroaki Sameshima, Kosuke Sato, Rie Sato, Goro Sato, Makoto Sawada, Peter Serlemitsos, Hiromi Seta, Yasuko Shibano, Maki Shida, Takanobu Shimada, Peter Shirron, Aurora Simionescu, Cynthia Simmons, Randall Smith, Gary Sneiderman, Yang Soong, Lukasz Stawarz, Yasuharu Sugawara, Satoshi Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiroaki Takahashi, Hiromitsu Takahashi, Shin-ichiro Takeda, Yoh Takei, Toru Tamagawa, Keisuke Tamura, Takayuki Tamura, Takaaki Tanaka, Yasuyuki Tanaka, Yasuo Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yoko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Hideki Uchiyama, Yasunobu Uchiyama, Yoshihiro Ueda, Shutaro Ueda, Shiro Ueno, Shinichiro Uno, Meg Urry, Eugenio Ursino, Cor de Vries, Atsushi Wada, Shin Watanabe, Tomomi Watanabe, Norbert Werner, Nicholas White, Dan Wilkins, Shinya Yamada, Takahiro Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida, Takayuki Yuasa, Irina Zhuravleva, Abderahmen Zoghbi, John ZuHone

Proceedings Volume 9144, 914425 (2014) https://doi.org/10.1117/12.2055681

KEYWORDS: Sensors, X-rays, Hard x-rays, X-ray telescopes, X-ray astronomy, Physics, Space telescopes, Satellites, Astronomy, Spectroscopy

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Proceedings Article | 30 September 2013 Paper

Cryogenic silicon carbide mirrors for infrared astronomical telescopes: lessons learnt from AKARI for SPICA

Takashi Onaka, Hidehiro Kaneda, Mitsunobu Kawada, Keigo Enya, Takao Nakagawa

Proceedings Volume 8837, 88370K (2013) https://doi.org/10.1117/12.2026662

KEYWORDS: Space telescopes, Mirrors, Infrared telescopes, Telescopes, Silicon carbide, Cryogenics, Infrared astronomy, Infrared radiation, Astronomical telescopes, Space mirrors

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Proceedings Article | 30 September 2013 Paper

Manufacturing and optical testing of 800 mm lightweight all C/SiC optics

Hidehiro Kaneda, Masataka Naitoh, Takao Nakagawa, Tadashi Imai, Haruyoshi Katayama, Masahiro Suganuma, Yoshio Tange, Ryota Sato, Keigo Enya, Masaki Kotani, Kenta Maruyama, Takashi Onaka, Takuma Kokusho

Proceedings Volume 8837, 88370I (2013) https://doi.org/10.1117/12.2025259

KEYWORDS: Mirrors, Telescopes, Space telescopes, Silicon carbide, Cryogenics, Optical testing, Optics manufacturing, Interferometers, Silicon, Optical benches

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Proceedings Article | 21 September 2012 Paper

SPICA coronagraph instrument: characterization of atmospheres and physical parameters of giant planets by direct imaging and spectroscopy

T. Kotani, K. Enya, T. Nakagawa, H. Matsuhara, H. Kataza, M. Kawada, M. Mita, K. Komatsu, H. Uchida, K. Fujiwara, S. Mitani, S. Sakai, K. Haze, H. Kaneda, S. Oyabu, D. Ishihara, T. Miyata, S. Sako, T. Nakamura, K. Asano, M. Tamura, J. Nishikawa, T. Yamashita, N. Narita, H. Hayano, S. Oya, E. Kokubo, Y. Itoh, T. Matsuo, M. Fukagawa, H. Shibai, M. Honda, N. Baba, N. Murakami, Y. Okamoto, S. Ida, M. Takami, L. Abe, O. Guyon, T. Yamamuro

Proceedings Volume 8442, 84420F (2012) https://doi.org/10.1117/12.925832

KEYWORDS: Coronagraphy, Imaging spectroscopy, Planets, Stars, Exoplanets, Point spread functions, Spectroscopy, Spectroscopes, Telescopes, Binary data

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Proceedings Article | 21 September 2012 Paper

Cooled scientific instrument assembly onboard SPICA

H. Matsuhara, T. Nakagawa, Y. Kawakatsu, H. Murakami, M. Kawada, H. Sugita, T. Yamawaki, S. Mitani, K. Shinozaki, Y. Sato, G. Crone, K. Isaak, A. Heske

Proceedings Volume 8442, 84423U (2012) https://doi.org/10.1117/12.926984

KEYWORDS: Space telescopes, Telescopes, Assembly equipment, Spectroscopy, Cryogenics, Cameras, Aerospace engineering, Space operations, Sensors, Optical benches

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Proceedings Article | 21 September 2012 Paper

The next-generation infrared space telescope SPICA

Takao Nakagawa, Hideo Matsuhara, Yasuhiro Kawakatsu

Proceedings Volume 8442, 84420O (2012) https://doi.org/10.1117/12.927243

KEYWORDS: Space telescopes, Telescopes, Infrared telescopes, Galactic astronomy, Spectroscopy, Stars, Astronomy, Planets, Cryogenics, Infrared radiation

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Proceedings Article | 21 September 2012 Paper

Development of CdZnTe immersion grating for spaceborne application

Yuki Sarugaku, Yuji Ikeda, Naoto Kobayashi, Takashi Sukegawa, Shigeru Sugiyama, Keigo Enya, Hirokazu Kataza, Hideo Matsuhara, Takao Nakagawa, Hideyo Kawakita, Sohei Kondo, Yasuhiro Hirahara, Chikako Yasui

Proceedings Volume 8442, 844257 (2012) https://doi.org/10.1117/12.926742

KEYWORDS: Coating, Diffraction gratings, Signal attenuation, Transmittance, FT-IR spectroscopy, Aluminum, Spectrographs, Metals, Space telescopes, Optical design

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Proceedings Article | 21 September 2012 Paper

A laboratory experiment for a new free-standing pupil mask coronagraph

K. Haze, K. Enya, T. Kotani, L. Abe, T. Nakagawa, H. Matsuhara, T. Sato, T. Yamamuro

Proceedings Volume 8442, 84425B (2012) https://doi.org/10.1117/12.925845

KEYWORDS: Coronagraphy, Point spread functions, Photomasks, Infrared telescopes, Space telescopes, Infrared radiation, Numerical simulations, Exoplanets, Glasses, Refractive index

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Proceedings Article | 21 September 2012 Paper

Experimental and numerical study of stitching interferometry for the optical testing of the SPICA Telescope

Hidehiro Kaneda, Masataka Naitoh, Tadashi Imai, Haruyoshi Katayama, Takashi Onaka, Takao Nakagawa, Mitsunobu Kawada, Mitsuyoshi Yamagishi, Takuma Kokusho

Proceedings Volume 8442, 84423T (2012) https://doi.org/10.1117/12.926879

KEYWORDS: Telescopes, Space telescopes, Mirrors, Optical testing, James Webb Space Telescope, Infrared telescopes, Stitching interferometry, Cryogenics, Numerical simulations, Interferometers

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Proceedings Article | 17 September 2012 Paper

The ASTRO-H X-ray Observatory

Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley, Henri Aarts, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Mark Bautz, Roger Blandford, Kevin Boyce, Greg Brown, Ed Cackett, Mara Chernyakova, Paolo Coppi, Elisa Costantini, Jelle de Plaa, Jan-Willem den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Megan Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Keith Gendreau, Kirk Gilmore, Daniel Haas, Yoshito Haba, Kenji Hamaguchi, Isamu Hatsukade, Takayuki Hayashi, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Una Hwang, Ryo Iizuka, Yoshiyuki Inoue, Kazunori Ishibashi, Manabu Ishida, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Ito, Naoko Iwata, Naoko Iyomoto, Jelle Kaastra, Timothy Kallman, Tuneyoshi Kamae, Jun Kataoka, Satoru Katsuda, Hajime Kawahara, Madoka Kawaharada, Nobuyuki Kawai, Shigeo Kawasaki, Dmitry Khangaluyan, Caroline Kilbourne, Masashi Kimura, Kenzo Kinugasa, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Tatsuro Kosaka, Alex Koujelev, Katsuji Koyama, Hans Krimm, Aya Kubota, Hideyo Kunieda, Stephanie LaMassa, Philippe Laurent, Francois Lebrun, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb, Grzegorz Madejski, Yoshitomo Maeda, Kazuo Makishima, Genevieve Marchand, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, Jon Miller, Eric Miller, Shin Mineshige, Kenji Minesugi, Ikuyuki Mitsuishi, Takuya Miyazawa, Tsunefumi Mizuno, Hideyuki Mori, Koji Mori, Koji Mukai, Toshio Murakami, Hiroshi Murakami, Richard Mushotzky, Hosei Nagano, Ryo Nagino, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Kazuhiro Nakazawa, Yoshiharu Namba, Chikara Natsukari, Yusuke Nishioka, Masayoshi Nobukawa, Masaharu Nomachi, Steve O'Dell, Hirokazu Odaka, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Takaya Ohashi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Atsushi Okamoto, Tsuyoshi Okazaki, Naomi Ota, Masanobu Ozaki, Fritzs Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Martin Pohl, F. Scott Porter, Brian Ramsey, Rubens Reis, Christopher Reynolds, Helen Russell, Samar Safi-Harb, Shin-ichiro Sakai, Hiroaki Sameshima, Jeremy Sanders, Goro Sato, Rie Sato, Yohichi Sato, Kosuke Sato, Makoto Sawada, Peter Serlemitsos, Hiromi Seta, Yasuko Shibano, Maki Shida, Takanobu Shimada, Keisuke Shinozaki, Peter Shirron, Aurora Simionescu, Cynthia Simmons, Randall Smith, Gary Sneiderman, Yang Soong, Lukasz Stawarz, Yasuharu Sugawara, Hiroyuki Sugita, Satoshi Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Shin-ichiro Takeda, Yoh Takei, Toru Tamagawa, Takayuki Tamura, Keisuke Tamura, Takaaki Tanaka, Yasuo Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Yasunobu Uchiyama, Hideki Uchiyama, Yoshihiro Ueda, Shiro Ueno, Shinichiro Uno, Meg Urry, Eugenio Ursino, Cor de Vries, Atsushi Wada, Shin Watanabe, Norbert Werner, Nicholas White, Takahiro Yamada, Shinya Yamada, Hiroya Yamaguchi, Noriko Yamasaki, Shigeo Yamauchi, Makoto Yamauchi, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida, Takayuki Yuasa

Proceedings Volume 8443, 84431Z (2012) https://doi.org/10.1117/12.926190

KEYWORDS: Sensors, X-rays, Hard x-rays, X-ray telescopes, Physics, X-ray astronomy, Iron, Spectroscopy, X-ray imaging, Galaxy groups and clusters

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Proceedings Article | 13 September 2012 Paper

Fabrication and tolerances of moth-eye structures for perfect antireflection in the mid-infrared wavelength region

Hiroaki Imada, Takashi Miyata, Shigeyuki Sako, Takafumi Kamizuka, Tomohiko Nakamura, Kentaro Asano, Mizuho Uchiyama, Kazushi Okada, Takehiko Wada, Takao Nakagawa, Takashi Onaka, Itsuki Sakon

Proceedings Volume 8450, 84502F (2012) https://doi.org/10.1117/12.925762

KEYWORDS: Antireflective coatings, Transmittance, Silicon, Mid-IR, Refractive index, Tolerancing, Astronomy, Scanning electron microscopy, Absorption, Solids

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Proceedings Article | 13 September 2012 Paper

Development of high-throughput silicon lens and grism with moth-eye antireflection structure for mid-infrared astronomy

Takafumi Kamizuka, Takashi Miyata, Shigeyuki Sako, Hiroaki Imada, Tomohiko Nakamura, Kentaro Asano, Mizuho Uchiyama, Kazushi Okada, Takehiko Wada, Takao Nakagawa, Takashi Onaka, Itsuki Sakon

Proceedings Volume 8450, 845051 (2012) https://doi.org/10.1117/12.926858

KEYWORDS: Antireflective coatings, Silicon, Coating, Photomasks, Transmittance, Semiconducting wafers, Astronomy, Refractive index, Mid-IR, Optical components

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Proceedings Article | 13 September 2012 Paper

The 3.2m all SiC Telescope for SPICA

Didier Castel, Emmanuel Sein, Sebastien Lopez, Takao Nakagawa, Michel Bougoin

Proceedings Volume 8450, 84502P (2012) https://doi.org/10.1117/12.926891

KEYWORDS: Telescopes, Mirrors, Polishing, Space telescopes, Reflectors, Silicon carbide, Optical benches, Optical instrument design, Reflector telescopes, Manufacturing

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Proceedings Article | 11 August 2010 Paper

Development and tests of interferometry facility in 6-m diameter radiometer thermal vacuum chamber in Tsukuba Space Center

Masahiro Suganuma, Haruyoshi Katayama, Masataka Naitoh, Tadashi Imai, Masashi Miyamoto, Kenta Maruyama, Hidehiro Kaneda, Yoshio Tange, Takao Nakagawa

Proceedings Volume 7731, 77313X (2010) https://doi.org/10.1117/12.857547

KEYWORDS: Interferometers, Atmospheric optics, Mirrors, Wavefronts, Monochromatic aberrations, Optical testing, Interferometry, Radio optics, Space telescopes, Radiometry

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Proceedings Article | 11 August 2010 Paper

Development of a wavefront correction system for the SPICA coronagraph instrument

Takayuki Kotani, Keigo Enya, Takao Nakagawa, Lyu Abe, Kanae Haze, Shin Higuchi, Yoshio Tange

Proceedings Volume 7731, 77314F (2010) https://doi.org/10.1117/12.857083

KEYWORDS: Wavefronts, Speckle, Coronagraphy, Planets, Adaptive optics, Cryogenics, Telescopes, Wavefront sensors, Mirrors, Spectroscopy

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Proceedings Article | 11 August 2010 Paper

Conceptual design of a cryogenic system for the next-generation infrared space telescope SPICA

Y. Sato, H. Sugita, K. Shinozaki, A. Okamoto, T. Yamawaki, K. Komatsu, T. Nakagawa, H. Murakami, H. Matsuhara, M. Murakami, M. Takada, S. Takai, A. Okabayashi, K. Kanao, S. Tsunematsu, K. Otsuka, K. Narasaki

Proceedings Volume 7731, 77314G (2010) https://doi.org/10.1117/12.857246

KEYWORDS: Space telescopes, Infrared telescopes, Cryogenics, Cryocoolers, Telescopes, Infrared radiation, Space operations, Optical benches, Optical instrument design, Aerospace engineering

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Proceedings Article | 11 August 2010 Paper

Precision pointing control for SPICA: requirements and feasibility study

Shinji Mitani, Takanori Iwata, Ken Fujiwara, Shin-ichiro Sakai, Keigo Enya, Takayuki Kotani, Hideo Matsuhara, Takao Nakagawa, Toshio Matsumoto, Woong-Seob Jeong, Dae-Hee Lee

Proceedings Volume 7731, 77314D (2010) https://doi.org/10.1117/12.857173

KEYWORDS: Stars, Coronagraphy, Sensors, Cameras, Mirrors, Control systems, Spectroscopy, Optical isolators, Cryogenics, Actuators

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Proceedings Article | 10 August 2010 Paper

AKARI infrared bright source catalogues

S. Oyabu, I. Yamamura, C. Alfageme, P. Barthel, A. Cassatella, M. Cohen, N. Cox, E. Figueredo, H. Fujiwara, N. Ikeda, D. Ishihara, W.-S. Jeong, H. Kataza, Do Kester, H. M. Lee, S. Makiuti, T. Mueller, T. Nakagawa, S. Takita, S. H. Oh, S. Oliver, C. Pearson, N. Rahman, M. Rowan-Robinson, A. Salama, R. Savage, S. Serjeant, G. J. White, C. Yamauchi

Proceedings Volume 7731, 77312P (2010) https://doi.org/10.1117/12.856931

KEYWORDS: Infrared radiation, Astronomy, Radio astronomy, Sensors, Mid-IR, Cadmium sulfide, Satellites, Calibration, Physics, Space telescopes

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Proceedings Article | 6 August 2010 Paper

System requirements and design concept of the SPICA Mission

Nobuhiro Takahashi, Takao Nakagawa, Hiroshi Murakami, Hideo Matsuhara, Hiroyuki Sugita, Toshihiko Yamawaki

Proceedings Volume 7731, 77310P (2010) https://doi.org/10.1117/12.856808

KEYWORDS: Space telescopes, Telescopes, Space operations, Satellites, Infrared astronomy, Infrared radiation, Mirrors, Galactic astronomy, Cooling systems, Infrared telescopes

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Proceedings Article | 6 August 2010 Paper

Optical testing activities for the SPICA telescope

Hidehiro Kaneda, Takao Nakagawa, Keigo Enya, Yoshio Tange, Tadashi Imai, Haruyoshi Katayama, Masahiro Suganuma, Masataka Naitoh, Kenta Maruyama, Takashi Onaka, Yuichi Kiriyama, Tatsuya Mori, Ai Takahashi

Proceedings Volume 7731, 77310V (2010) https://doi.org/10.1117/12.856927

KEYWORDS: Space telescopes, Telescopes, Mirrors, Optical testing, Cryogenics, James Webb Space Telescope, Infrared telescopes, Stitching interferometry, Optical benches, Interferometers

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Proceedings Article | 6 August 2010 Paper

The next-generation space infrared astronomy mission SPICA

Takao Nakagawa

Proceedings Volume 7731, 77310O (2010) https://doi.org/10.1117/12.857088

KEYWORDS: Space telescopes, Telescopes, Spectroscopy, Galactic astronomy, Stars, Astronomy, Planets, Cryogenics, Infrared telescopes, Mid-IR

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Proceedings Article | 31 July 2010 Paper

The ASTRO-H Mission

Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley, Felix Aharonian, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Hisamitsu Awaki, Aya Bamba, Nobutaka Bando, Mark Bautz, Roger Blandford, Kevin Boyce, Greg Brown, Mara Chernyakova, Paolo Coppi, Elisa Costantini, Jean Cottam, John Crow, Jelle de Plaa, Cor de Vries, Jan-Willem den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, Ken Ebisawa, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Poshak Gandhi, Keith Gendreau, Kirk Gilmore, Yoshito Haba, Kenji Hamaguchi, Isamu Hatsukade, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, John Hughes, Una Hwang, Ryo Iizuka, Kazunori Ishibashi, Manabu Ishida, Kosei Ishimura, Yoshitaka Ishisaki, Naoki Isobe, Masayuki Ito, Naoko Iwata, Jelle Kaastra, Tim Kallman, Tuneyoshi Kamae, Hideaki Katagiri, Jun Kataoka, Satoru Katsuda, Madoka Kawaharada, Nobuyuki Kawai, Shigeo Kawasaki, Dmitry Khangaluyan, Caroline Kilbourne, Kenzo Kinugasa, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Tatsuro Kosaka, Taro Kotani, Katsuji Koyama, Aya Kubota, Hideyo Kunieda, Philippe Laurent, Francois Lebrun, Olivier Limousin, Michael Loewenstein, Knox Long, Grzegorz Madejski, Yoshitomo Maeda, Kazuo Makishima, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Jon Miller, Shin Mineshige, Kenji Minesugi, Takuya Miyazawa, Tsunefumi Mizuno, Koji Mori, Hideyuki Mori, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Yujin Nakagawa, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Kazuhiro Nakazawa, Yoshiharu Namba, Masaharu Nomachi, Stephen O'Dell, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Takaya Ohashi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Naomi Ota, Masanobu Ozaki, Frederik Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Martin Pohl, S. Porter, Brian Ramsey, Christopher Reynolds, Shin-ichiro Sakai, Rita Sambruna, Goro Sato, Yoichi Sato, Peter Serlemitsos, Maki Shida, Takanobu Shimada, Keisuke Shinozaki, Peter Shirron, Randall Smith, Gary Sneiderman, Yang Soong, Lukasz Stawarz, Hiroyuki Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Yoh Takei, Tohru Tamagawa, Takayuki Tamura, Keisuke Tamura, Takaaki Tanaka, Yasayuki Tanaka, Yasuo Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Miyako Tozuka, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Yasunobu Uchiyama, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Meg Urry, Shin Watanabe, Nicholas White, Takahiro Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida

Proceedings Volume 7732, 77320Z (2010) https://doi.org/10.1117/12.857875

KEYWORDS: Sensors, X-rays, Hard x-rays, Physics, X-ray telescopes, X-ray imaging, Spectroscopy, Spatial resolution, Imaging systems, Iron

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Proceedings Article | 15 July 2010 Paper

Development of a far-infrared Ge:Ga monolithic array for a possible application to SPICA

Mai Shirahata, Shuhei Kamiya, Shuji Matsuura, Mitsunobu Kawada, Yoshihiro Sawayama, Yasuo Doi, Takao Nakagawa, Takehiko Wada, Hidehiro Kawada, Ybe Creten, Burak Okcan, Walfried Raab, Albrecht Poglitsch

Proceedings Volume 7741, 77410B (2010) https://doi.org/10.1117/12.857772

KEYWORDS: Sensors, Electrodes, Germanium, Prototyping, Photoresistors, Electronics, Cryogenics, Transmittance, Chromium, Gold

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Proceedings Article | 27 August 2009 Paper

Assessment study of the SPICA telescope assembly

N. Rando, O. Brunner, D. Doyle, B. Fransen, A. Heras, J. Lautier, M. Linder, L. Popken, T. Nakagawa

Proceedings Volume 7436, 743605 (2009) https://doi.org/10.1117/12.826012

KEYWORDS: Space telescopes, Telescopes, Space operations, Mirrors, Cryogenics, Optical benches, Interfaces, Ceramics, Infrared telescopes, Optical design

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Proceedings Article | 22 August 2009 Paper

Manufacturing and performance test of a 800 mm space optic

Matthias Krödel, Tsuyoshi Ozaki, Masami Kume, Yukari Yui, Hiroko Imai, Haruyoshi Katayama, Yoshio Tange, Takao Nakagawa

Proceedings Volume 7426, 74260K (2009) https://doi.org/10.1117/12.825226

KEYWORDS: Mirrors, Manufacturing, Polishing, Optics manufacturing, Raw materials, Optical benches, Silicon, Space mirrors, Optical testing, Mirror structures

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Proceedings Article | 3 September 2008 Paper

Results of the ESA internal assessment study of the European contribution to SPICA

T. Jagemann, N. Rando, D. Doyle, A. Heras, T. Nakagawa, B. Swinyard

Proceedings Volume 7082, 70820Z (2008) https://doi.org/10.1117/12.793646

KEYWORDS: Telescopes, Space telescopes, Space operations, Sensors, Fourier transforms, Spectroscopy, Mirrors, Infrared telescopes, Cryogenics, Optical instrument design

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Proceedings Article | 25 July 2008 Paper

Manufacturing and performance test of an 800-mm space optic

Matthias Krödel, Tsuyoshi Ozaki, Masami Kume, Akira Furuya, Yukari Yui, Hiroko Imai, Haruyoshi Katayama, Yoshio Tange, Takao Nakagawa, Hidehiro Kaneda

Proceedings Volume 7018, 70180A (2008) https://doi.org/10.1117/12.788965

KEYWORDS: Mirrors, Surface finishing, Polishing, Manufacturing, Optical benches, Optics manufacturing, Space mirrors, Raw materials, Silicon, Coating

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Proceedings Article | 15 July 2008 Paper

The x-ray microcalorimeter on the NeXT mission

Kazuhisa Mitsuda, Noriko Yamasaki, Keisuke Shinozaki, Yoh Takei, Takao Nakagawa, Hiroyuki Sugita, Yohichi Satoh, Ryuichi Fujimoto, Takaya Ohashi, Yoshitaka Ishisaki, Yuichiro Ezoe, Masahide Murakami, Makoto Tashiro, Yukikatsu Terada, Shunji Kitamoto, Toru Tamagawa, Madoka Kawaharada, Tatehiro Mihara, Richard Kelley, Caroline Kilbourne, F. Scott Porter, Peter Shirron, Michael DiPirro, Dan McCammon, Jan-Willem den Herder

Proceedings Volume 7011, 70112K (2008) https://doi.org/10.1117/12.787952

KEYWORDS: X-rays, X-ray telescopes, Analog electronics, Helium, Spectroscopy, Iron, Liquids, Spectroscopes, Cryogenics, Galaxy groups and clusters

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Proceedings Article | 15 July 2008 Paper

Design of the two-stage series adiabatic demagnetization refrigerator for the NeXT and Spectrum-RG missions

K. Shinozaki, K. Mitsuda, N. Yamasaki, Y. Takei, M. DiPirro, Y. Ezoe, R. Fujimoto, J. W. den Herder, M. Hirabayashi, Y. Ishisaki, K. Kanao, M. Kawaharada, R. Kelley, C. Kilbourne, S. Kitamoto, D. McCammon, T. Mihara, M. Murakami, T. Nakagawa, T. Ohashi, F. S. Porter, Y. Satoh, P. Shirron, H. Sugita, T. Tamagawa, M. Tashiro, S. Yoshida

Proceedings Volume 7011, 70113R (2008) https://doi.org/10.1117/12.788634

KEYWORDS: Magnetism, Switches, X-ray telescopes, X-rays, Liquids, Spectroscopy, Sensors, Potassium, Cooling systems, X-ray astronomy

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Proceedings Article | 12 July 2008 Paper

Data reduction techniques for slit and slit-less spectroscopy of diffuse emission with the Infrared Camera onboard AKARI

Itsuki Sakon, Takashi Onaka, Takehiko Wada, Youichi Ohyama, Hideo Matsuhara, Naofumi Fujishiro, Daisuke Ishihara, Yoshifusa Ita, Hidehiro Kaneda, Hirokazu Kataza, Woojung Kim, Toshio Matsumoto, Hiroshi Murakami, Takao Nakagawa, Shinki Oyabu, Toshihiko Tanabe, Toshinobu Takagi, Kazunori Uemizu, Munetaka Ueno, Fumihiko Usui, Hidenori Watarai, Martin Cohen

Proceedings Volume 7010, 70102Y (2008) https://doi.org/10.1117/12.788696

KEYWORDS: Spectroscopy, Imaging spectroscopy, Infrared cameras, Photons, Galactic astronomy, Light, Satellites, Infrared radiation, Emission spectroscopy, Astronomy

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Proceedings Article | 12 July 2008 Paper

Mid-infrared all-sky survey with AKARI/IRC

Daisuke Ishihara, Takashi Onaka, Hirokazu Kataza, Hideaki Fujiwara, Satoshi Takita, Carlos Alfageme, Martin Cohen, Naofumi Fujishiro, Pedro Garcia-Lario, Sunao Hasegawa, Yoshifusa Ita, Woojung Kim, Takao Nakagawa, Hideo Matsuhara, Toshio Matsumoto, Hiroshi Murakami, Youichi Ohyama, Shinki Oyabu, Jeonghyun Pyo, Itsuki Sakon, Alberto Salama, Craig Stephenson, Hiroshi Shibai, Toshihiko Tanabe, Kazunori Uemizu, Munetaka Ueno, Fumihiko Usui, Takehiko Wada, Hidenori Watarai, Chisato Yamauchi, Issei Yamamura

Proceedings Volume 7010, 70100B (2008) https://doi.org/10.1117/12.788737

KEYWORDS: Mid-IR, Astronomy, Calibration, Spatial resolution, Signal processing, Stars, Infrared radiation, Infrared astronomy, Satellites, Image processing

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Proceedings Article | 12 July 2008 Paper

Slow-scan performance of the Far-Infrared Surveyor (FIS) onboard AKARI

Mai Sirahata, Shuji Matsuura, Sunao Hasegawa, Takafumi Ootsubo, Sin'itirou Makiuti, Issei Yamamura, Takao Nakagawa, Hidehiro Kaneda, Yasuo Doi, Mitsunobu Kawada, Hiroshi Shibai, Thomas Müller, Martin Cohen

Proceedings Volume 7010, 70100D (2008) https://doi.org/10.1117/12.788714

KEYWORDS: Calibration, Sensors, Asteroids, Stars, Point spread functions, Photometry, Galactic astronomy, Astronomy, Satellites, Detector arrays

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Proceedings Article | 12 July 2008 Paper

The European contribution to the SPICA mission

Bruce Swinyard, Takao Nakagawa, Hideo Matsuhara, Doug Griffin, Marc Ferlet, Paul Eccleston, Anna di Giorgio, Jochem Baselmans, Javier Goicoechea, Kate Isaak, Phillip Mauskopf, Louis Rodriguez, Frederic Pinsard, Walfried Raab, Lionel Duband, Nicholas Luchier, Nicola Rando, Ana Heras, Thomas Jagemann, Norbert Geis, Sebastien Vives

Proceedings Volume 7010, 70100I (2008) https://doi.org/10.1117/12.789195

KEYWORDS: Space telescopes, Telescopes, Mirrors, Sensors, Optical benches, Space operations, Optical instrument design, Diffraction, Satellites, Far infrared

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Proceedings Article | 12 July 2008 Paper

Mid-infrared coronagraph for SPICA

K. Enya, L. Abe, K. Haze, S. Tanaka, T. Nakagawa, H. Kataza, S. Higuchi, T. Miyata, S. Sako, T. Nakamura, M. Tamura, J. Nishikawa, N. Murakami, Y. Itoh, T. Wakayama, T. Sato, N. Nakagiri, O. Guyon, M. Venet, P. Bierden

Proceedings Volume 7010, 70102Z (2008) https://doi.org/10.1117/12.788509

KEYWORDS: Coronagraphy, Space telescopes, Infrared telescopes, Cryogenics, Telescopes, Mirrors, Binary data, Infrared radiation, Microelectromechanical systems, James Webb Space Telescope

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The SPace Infrared telescope for Cosmology and Astrophysics (SPICA) is a infrared space-borne telescope mission of the next generation following AKARI. SPICA will carry a telescope with a 3.5 m diameter monolithic primary mirror and the whole telescope will be cooled to 5 K. SPICA is planned to be launched in 2017, into the sun-earth L2 libration halo orbit by an H II-A rocket and execute infrared observations at wavelengths mainly between 5 and 200 micron. The large telescope aperture, the simple pupil shape, the capability of infrared observations from space, and the early launch gives us with the SPICA mission a unique opportunity for coronagraphic observation. We have started development of a coronagraphic instrument for SPICA. The primary target of the SPICA coronagraph is direct observation of extra-solar Jovian planets. The main wavelengths of observation, the required contrast and the inner working angle (IWA) of the SPICA coronagraph are set to be 5-27 micron (3.5-5 micron is optional), 10^-6, and a few λ/D (and as small as possible), respectively, in which λ is the observation wavelength and D is the diameter of the telescope aperture (3.5m). For our laboratory demonstration, we focused first on a coronagraph with a binary shaped pupil mask as the primary candidate for SPICA because of its feasibility. In an experiment with a binary shaped pupil coronagraph with a He-Ne laser (λ=632.8nm), the achieved raw contrast was 6.7×10^-8, derived from the average measured in the dark region without active wavefront control. On the other hand, a study of Phase Induced Amplitude Apodization (PIAA) was initiated in an attempt to achieve better performance, i.e., smaller IWA and higher throughput. A laboratory experiment was performed using a He-Ne laser with active wavefront control, and a raw contrast of 6.5×10^-7 was achieved. We also present recent progress made in the cryogenic active optics for SPICA. Prototypes of cryogenic deformable by Micro Electro Mechanical Systems (MEMS) techniques were developed and a first demonstration of the deformation of their surfaces was performed with liquid nitrogen cooling. Experiments with piezo-actuators for a cryogenic tip-tilt mirror are also ongoing.

Proceedings Article | 12 July 2008 Paper

Far-Infrared Surveyor on AKARI: in-orbit characterization of transient response and radiation effects of Ge:Ga array detectors

Hidehiro Kaneda, Toyoaki Suzuki, Alain Coulais, Yasuo Doi, Boris Fouks, Mitsunobu Kawada, Sin'itirou Makiuti, Shuji Matsuura, Noriko Murakami, Takao Nakagawa, Yoko Okada, Hiroshi Shibai, Mai Shirahata, Hidenori Takahashi, Akiko Yasuda

Proceedings Volume 7010, 70100E (2008) https://doi.org/10.1117/12.788641

KEYWORDS: Sensors, Radiation effects, Fourier transforms, Photoresistors, Data modeling, Signal detection, Astronomy, Galactic astronomy, Data analysis, Observatories

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Proceedings Article | 12 July 2008 Paper

Imaging Fourier transform spectrometer with photoconductive detector arrays: an application to the AKARI far-infrared instrument

Mitsunobu Kawada, Hidenori Takahashi, Noriko Murakami, Yoko Okada, Akiko Yasuda, Toshifumi Ootsubo, Hidehiro Kaneda, Hiroshi Matsuo, Shuji Matsuura, Mai Shirahata, Yasuo Doi, Mikio Fujiwara, Issei Yamamura, Takao Nakagawa, Hiroshi Shibai

Proceedings Volume 7010, 70100F (2008) https://doi.org/10.1117/12.788663

KEYWORDS: Sensors, Mirrors, Calibration, Fourier transforms, Astronomy, Modulation, Detector arrays, Spectroscopy, Black bodies, Interferometers

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Proceedings Article | 12 July 2008 Paper

Mid-infrared high-resolution spectrograph for SPICA

Naoto Kobayashi, Yuji Ikeda, Hideyo Kawakita, Keigo Enya, Takao Nakagawa, Hirokazu Kataza, Hideo Matsuhara, Yasuhiro Hirahara, Hitoshi Tokoro

Proceedings Volume 7010, 701032 (2008) https://doi.org/10.1117/12.799423

KEYWORDS: Space telescopes, Spectrographs, Diffraction, Infrared telescopes, Aerospace engineering, Spectroscopes, Telescopes, Absorption, Refractive index, Spectral resolution

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Proceedings Article | 12 July 2008 Paper

Cryogenic system for the infrared space telescope SPICA

Hiroyuki Sugita, Yoichi Sato, Takao Nakagawa, Hiroshi Murakami, Hidehiro Kaneda, Keigo Enya, Masahide Murakami, Shoji Tsunematsu, Masayuki Hirabayashi

Proceedings Volume 7010, 701030 (2008) https://doi.org/10.1117/12.788721

KEYWORDS: Cryocoolers, Cryogenics, Infrared telescopes, Space telescopes, Reliability, Space operations, Mirrors, Head, Infrared radiation, Optical benches

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Proceedings Article | 12 July 2008 Paper

SPICA mission for mid- and far-infrared astronomy

Takao Nakagawa

Proceedings Volume 7010, 70100H (2008) https://doi.org/10.1117/12.789923

KEYWORDS: Telescopes, Space telescopes, James Webb Space Telescope, Astronomy, Infrared telescopes, Astronomical telescopes, Stars, Spatial resolution, Mirrors, Cryogenics

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Proceedings Article | 9 July 2008 Paper

Multi-stage apodized pupil Lyot coronagraph experimental results

L. Abe, M. Venet, K. Enya, H. Kataza, T. Nakagawa, M. Tamura

Proceedings Volume 7014, 701467 (2008) https://doi.org/10.1117/12.787305

KEYWORDS: Coronagraphy, Cameras, Point spread functions, Data modeling, Glasses, Microscopes, Space telescopes, Absorbance, Numerical simulations, Signal attenuation

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Proceedings Article | 19 September 2007 Paper

Coronagraph project with the SPICA mission

K. Enya, L. Abe, S. Tanaka, K. Haze, M. Venet, T. Nakagawa, H. Kataza, M. Tamura, J. Nishikawa, N. Murakami, K. Fujita, Y. Itoh, O. Guyon, E. Pluzhnik, T. Wakayama, T. Sato, N. Nakagiri

Proceedings Volume 6693, 66930I (2007) https://doi.org/10.1117/12.733707

KEYWORDS: Coronagraphy, Space telescopes, Telescopes, Point spread functions, Mirrors, Infrared telescopes, Binary data, James Webb Space Telescope, Photomasks, Wavefronts

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We present the status of the development of a coronagraph for the Space Infrared telescope for Cosmology and Astrophysics (SPICA). SPICA is the next generation of infrared space-borne telescope missions following to AKARI, led by Japan. SPICA will carry a telescope that has a 3.5 m diameter monolithic primary mirror and the whole telescope will be cooled to 4.5 K. It is planned to launch SPICA into the sun-earth L2 libration halo orbit using H II-A rocket in the middle of the 2010s and execute infrared observations at wavelengths mainly between 5 and 200 micron. The SPICA mission gives us a unique opportunity for coronagraph observations, because of the large telescope aperture, the simple pupil shape, the capability of infrared observations from space, and the early launch. We have started development of the SPICA coronagraph in which the primary target is direct observation of extra-solar Jovian planets. The main wavelengths of observation, the required contrast and the inner working angle (IWA) of the SPICA coronagraph instrument are set to be 5-27 micron, 10^-6, and a few λ/D (and as small as possible), respectively, in which λ is the observation wavelength and D is the diameter of the telescope aperture (3.5m). We focused on a coronagraph with a binary shaped pupil mask as the primary candidate for SPICA because of its feasibility. Nano-fabrication technology using electron beam lithography was applied to manufacture a high precision mask and a laboratory experiment with a He-Ne laser (λ=632.8nm) was performed in air without active wavefront control. The raw contrast derived from the average measured in the dark region reached 6.7×10^-8. On the other hand, a study of Phase Induced Amplitude Apodization (PIAA) was started in an attempt to achieve higher performance, i.e., smaller IWA and higher throughput. A hybrid solution using PIAA and a shaped pupil mask was proposed. A laboratory experiment was performed using a He- Ne laser with active wavefront control via a 32×32 channel deformable mirror. A raw contrast of 6.5×10^-7 was achieved. Designs of binary shaped pupil mask are presented for the actual SPICA pupil which is obstructed by the telescope's secondary mirror and its support. Subtraction of point spread function (PSF) was also evaluated.

Proceedings Article | 15 September 2007 Paper

Development of lightweight SiC mirrors for the space infrared telescope for cosmology and astrophysics (SPICA) mission

Hidehiro Kaneda, Takao Nakagawa, Takashi Onaka, Keigo Enya, Hirokazu Kataza, Sin'itirou Makiuti, Hideo Matsuhara, Masashi Miyamoto, Hiroshi Murakami, Hideki Saruwatari, Hidenori Watarai, Yukari Yui

Proceedings Volume 6666, 666607 (2007) https://doi.org/10.1117/12.733430

KEYWORDS: Mirrors, Space telescopes, Telescopes, Silicon carbide, Cryogenics, Infrared telescopes, James Webb Space Telescope, Space mirrors, Composites, Astronomy

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Proceedings Article | 7 July 2006 Paper

Development of an MIR coronagraph for the SPICA mission

Keigo Enya, Shinichiro Tanaka, Takao Nakagawa, Hirokazu Kataza, Lyu Abe, Motohide Tamura, Jun Nishikawa, Naoshi Murakami, Kenta Fujita, Yoich Itoh

Proceedings Volume 6265, 626536 (2006) https://doi.org/10.1117/12.670976

KEYWORDS: Coronagraphy, Space telescopes, Telescopes, Infrared telescopes, Mirrors, Point spread functions, Mid-IR, Infrared radiation, Planets, Binary data

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Proceedings Article | 21 June 2006 Paper

Automated 1.3m near-infrared telescope system triggered by gamma-ray burst

Toshio Murakami, Daisuke Yonetoku, Shin Kinoshita, Hiroki Masui, Shinya Okuno, Satoru Yoshinari, Takashi Kidamura, Sachiko Tanabe, Satoshi Yokota, Yukiyasu Kobayashi, Takao Nakagawa, Takashi Nakamura

Proceedings Volume 6267, 62670G (2006) https://doi.org/10.1117/12.670135

KEYWORDS: Telescopes, Space telescopes, Near infrared, Charge-coupled devices, Gamma radiation, Sensors, X-ray optics, Mirrors, Optical instrument design, Robotics

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Proceedings Article | 20 October 2005 Paper

Wavefront measurement of space infrared telescopes at cryogenic temperature

Hidehiro Kaneda, Takashi Onaka, Takao Nakagawa, Keigo Enya, Hiroshi Murakami, Ryoji Yamashiro, Tatsuhiko Ezaki, Yasuyuki Numao, Yoshikazu Sugiyama

Proceedings Volume 5965, 59650X (2005) https://doi.org/10.1117/12.624798

KEYWORDS: Telescopes, Mirrors, Space telescopes, Cryogenics, Silicon carbide, Temperature metrology, Infrared telescopes, Optical testing, Optical fabrication, Interferometers

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Proceedings Article | 15 October 2005 Paper

Development of large aperture cooled telescopes for the space infrared telescope for cosmology and astrophysics (SPICA) mission

Takashi Onaka, Hidehiro Kaneda, Keigo Enya, Takao Nakagawa, Hiroshi Murakami, Hideo Matsuhara, Hirokazu Kataza

Proceedings Volume 5962, 59621J (2005) https://doi.org/10.1117/12.625020

KEYWORDS: Space telescopes, Telescopes, Mirrors, Silicon carbide, Infrared telescopes, Cryogenics, James Webb Space Telescope, Optical instrument design, Silicon, Far infrared

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Proceedings Article | 18 August 2005 Paper

Mechanical and thermal performance of C/SiC composites for SPICA mirror

T. Ozaki, M. Kume, T. Oshima, T. Nakagawa, T. Matsumoto, H. Kaneda, H. Murakami, K. Kataza, K. Enya, Y. Yui, T. Onaka, M. Kroedel

Proceedings Volume 5868, 58680H (2005) https://doi.org/10.1117/12.619402

KEYWORDS: Composites, Mirrors, Silicon carbide, Silicon, Carbon, Liquids, Space telescopes, Reflectors, Polishing, Cryogenics

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Proceedings Article | 20 October 2004 Paper

A SPECS update: engineering and technology requirements for a space-based far-IR imaging interferometer

David Leisawitz, Ronald Allen, Charles Baker, Dominic Benford, Claudio Bombardelli, Michael DiPirro, Pascale Ehrenfreund, Neal Evans, Martin Harwit, Tristram Hyde, Antoine Labeyrie, Jesse Leitner, Alice Liu, Enrico Lorenzini, Richard Lyon, Anthony Martino, John Mather, Karl Menten, S. Harvey Moseley, Lee Mundy, Takao Nakagawa, Stanford Ollendorf, John Pearson, Dave Quinn, Stephen Rinehart, Juan Roman, Shobita Satyapal, Robert Silverberg, H. Philip Stahl, Mark Swain, Theodore Swanson, Wesley Traub, Edward Wright, Harold Yorke

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.552104

KEYWORDS: Space telescopes, Telescopes, Interferometers, Sensors, Interferometry, Mirrors, Spatial resolution, Infrared telescopes, Detector arrays, Beam splitters

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Proceedings Article | 12 October 2004 Paper

Preflight performance measurements of a monolithic Ge:Ga array detector for the Far-Infrared Surveyor onboard ASTRO-F

Mai Shirahata, Shuji Matsuura, Shin'ichiro Makiuti, Mikhail Patrashin, Hidehiro Kaneda, Takao Nakagawa, Mikio Fujiwara, Yasuo Doi, Mitsunobu Kawada, Takanori Hirao, Toyoki Watabe, Hiroshi Shibai

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551104

KEYWORDS: Sensors, Detector arrays, Point spread functions, Cryogenics, Photoresistors, Electronics, Spatial resolution, Telescopes, Space telescopes, Quantum efficiency

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Proceedings Article | 12 October 2004 Paper

The 3.5-m all-SiC telescope for SPICA

Yves Toulemont, Jacques Breysse, Dominique Pierot, Emmanuel Sein, Takao Nakagawa, Hidehiro Kaneda, Takashi Onaka, Masayuki Hirabayashi, Katsuhiro Narasaki, Hironobu Sakuta, Shinji Miura

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551405

KEYWORDS: Telescopes, Mirrors, Polishing, Space telescopes, Reflectors, Silicon carbide, Optical benches, Manufacturing, Wavefronts, Optics manufacturing

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Proceedings Article | 12 October 2004 Paper

Optical quality of C/SiC composite for the SPICA telescope

Keigo Enya, Takao Nakagawa, Hirokazu Kataza, Hidehiro Kaneda, Yukari Yui, Takashi Onaka, Takeharu Oshima, Tsuyoshi Ozaki

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551668

KEYWORDS: Mirrors, Composites, Surface finishing, Silicon carbide, Surface roughness, Polishing, Space telescopes, Carbon, Coating, Spherical lenses

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Proceedings Article | 12 October 2004 Paper

Space cryogenic system for SPICA mission

Hiroyuki Sugita, Hiroki Nagai, Takao Nakagawa, Hiroshi Murakami, Toshio Matsumoto, Masahide Murakami, Katsuhiro Narasaki, Masayuki Hirabayashi

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551173

KEYWORDS: Cryocoolers, Cryogenics, Space telescopes, Mirrors, Telescopes, Optical instrument design, Infrared telescopes, Aerospace engineering, Reliability, Infrared astronomy

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Proceedings Article | 12 October 2004 Paper

Development of space infrared telescope for the SPICA mission

Hidehiro Kaneda, Takao Nakagawa, Takashi Onaka, Toshio Matsumoto, Hiroshi Murakami, Keigo Enya, Hirokazu Kataza, Hideo Matsuhara, Yukari Yui

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551026

KEYWORDS: Mirrors, Space telescopes, Telescopes, Silicon carbide, Composites, Cryogenics, Infrared telescopes, Surface finishing, Optical instrument design, Temperature metrology

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Proceedings Article | 12 October 2004 Paper

Far-Infrared Surveyor: design, operation, and performance

Mitsunobu Kawada, Hiroshi Shibai, Hidehiro Kaneda, Takao Nakagawa

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551065

KEYWORDS: Sensors, Fourier transforms, Spectroscopy, Telescopes, Calibration, Satellites, Scanners, Optical filters, Beam splitters, Polarizers

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Proceedings Article | 12 October 2004 Paper

SPECS: the kilometer-baseline far-IR interferometer in NASA's space science roadmap

David Leisawitz, Tom Abel, Ronald Allen, Dominic Benford, Andrew Blain, Claudio Bombardelli, Daniela Calzetti, Michael DiPirro, Pascale Ehrenfreund, Neal Evans, Jacqueline Fischer, Martin Harwit, Tristram Hyde, Marc Kuchner, Jesse Leitner, Enrico Lorenzini, John Mather, Karl Menten, Samuel Moseley, Lee Mundy, Takao Nakagawa, David Neufeld, John Pearson, Stephen Rinehart, Juan Roman, Shobita Satyapal, Robert Silverberg, H. Philip Stahl, Mark Swain, Theodore Swanson, Wesley Traub, Edward Wright, Harold Yorke

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552150

KEYWORDS: Space telescopes, Telescopes, Interferometers, Galactic astronomy, Stars, Interferometry, Spatial resolution, Astronomy, Infrared telescopes, Planets

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Proceedings Article | 12 October 2004 Paper

Performance of the Fourier transform spectrometer (FTS) for FIS onboard ASTRO-F

Noriko Murakami, Mitsunobu Kawada, Hidenori Takahashi, Keita Ozawa, Tetsuo Imamura, Hiroshi Shibai, Takao Nakagawa

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551452

KEYWORDS: Mirrors, Sensors, Fourier transforms, Spectroscopy, Temperature metrology, Black bodies, Polarizers, Spectral resolution, Beam splitters, Signal detection

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Proceedings Article | 30 September 2004 Paper

A new generation of large SIC telescopes for space applications

Emmanuel Sein, Yves Toulemont, Jacques Breysse, Pierre Deny, Daniel de Chambure, Takao Nakagawa, Masayuki Hirabayashi

Proceedings Volume 5528, (2004) https://doi.org/10.1117/12.563154

KEYWORDS: Space telescopes, Telescopes, Silicon carbide, Mirrors, Reflectors, Manufacturing, Polishing, Optical instrument design, Reflector telescopes, Space mirrors

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Large Space based IR are presently under development. These telescopes are placed on the L2 Lagrangian point and will operate in far infrared range. EADS-ASTRIUM is manugacturing HERSCHEL telescope and will extend its technology to the SPICA Telescope. HERSCHEL operates in the spectral range between 80 and 670 μm wavelength and is devoted to astronomical investigations in the far-infrared, sub-millimetre and millimetre wavelength range. ASTRIUM has been awarded by ESA to manufacture tgeh 3,5m all SiC telescope. The concept for the HERSCEL telescope is based on an axisymetric, 3,5-m-diameter Cassegrain design. The driving requirements are the large diameter (3,5m) especially for the manufacturing aspects, the WFE which has to be kept below 6μrms, the operational temperatuer (70k) which brings distortionas wrt ambient environment, and finally the mass to keep below 300kg. This Development is part of the ESA HERSCHEL PLANK program. SPICA Telescope driving requirements are also the large diameter (3,5m) especially critical for the manufacturing aspects, the WFE which has to be kept below 350nmrms, and the operational temperature (4,5K) which requires to master the distortions wrt ambient environment. Telescope will operate in the 5 to 200 μm wavelength range. ASTRIUM has been awarded by Sumitomo and ISAS to study the faisability of teh 3,5m all SiC telescope. The main features developed in this paper are: The final design and the recent manufacturing developments of the HERSHEL telescope and the expected performances of such a telescope in space environment The preliminary design of the SPICA telescope and teh predicted performances which are taking advantage from the Silicone Carbide properties developed for HERSCHEL telescope, especially considering the homogeneity inside the structure its stability from abient to the operational temperature range (4,5K). The study shows that the Silicone Carbide Telescope design can fulfil the mechanical and optical requirements, in a passive way without actuators.

Proceedings Article | 24 September 2004 Paper

Mechanical and thermal performance of C/SiC composites for SPICA mirror

Tsuyoshi Ozaki, Masami Kume, Takeharu Oshima, Takao Nakagawa, Toshio Matsumoto, Hidehiro Kaneda, Hiroshi Murakami, Koichi Kataza, Keigo Enya, Yukari Yui, Takashi Onaka, Matthias Krodel

Proceedings Volume 5494, (2004) https://doi.org/10.1117/12.552484

KEYWORDS: Mirrors, Composites, Carbon, Reflectors, Silicon carbide, Silicon, Liquids, Helium, Space telescopes, Mirror structures

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Proceedings Article | 5 March 2003 Paper

Performance of cryogenic preamplifiers for ASTRO-F far-infrared detectors

Yasushi Hibi, Takanori Hirao, Toyoki Watabe, Hirohisa Nagata, Manabu Noda, Mitsunobu Kawada, Takao Nakagawa, Hiroshi Shibai

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461758

KEYWORDS: Amplifiers, Sensors, Field effect transistors, Cryogenics, Detector arrays, Satellites, Transistors, Infrared telescopes, Capacitors, Infrared astronomy

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Proceedings Article | 5 March 2003 Paper

Optical performance of the ASTRO-F telescope at cryogenic temperatures

Hidehiro Kaneda, Takashi Onaka, Ryoji Yamashiro, Takao Nakagawa

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461181

KEYWORDS: Mirrors, Telescopes, Cryogenics, Silicon carbide, Space telescopes, Temperature metrology, Optical fabrication, Optical testing, Interferometers, Surface roughness

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Proceedings Article | 5 March 2003 Paper

FTS: Fourier transform spectrometer onboard ASTRO-F/FIS

Hidenori Takahashi, Mitsunobu Kawada, Noriko Murakami, Keita Ozawa, Hiroshi Shibai, Takao Nakagawa

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461637

KEYWORDS: Mirrors, Fourier transforms, Spectroscopy, Sensors, Polarizers, Detector arrays, Beam splitters, Satellites, Astronomy, Space telescopes

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Proceedings Article | 5 March 2003 Paper

Monolithic Ge: Ga two-dimensional array detector for FIS instrument on ASTRO-F

Shuji Matsuura, Yosuke Isozaki, Mai Shirahata, Hidehiro Kaneda, Takao Nakagawa, Michael Patrashin, Mikio Fujiwara, Takanori Hirao, Mitsunobu Kawada, Hiroshi Shibai, Toyoki Watabe

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461485

KEYWORDS: Sensors, Photoresistors, Detector arrays, Germanium, Semiconducting wafers, Infrared sensors, Satellites, Astronomy, Signal detection, Gallium

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Proceedings Article | 15 December 2000 Paper

Development of far-infrared Ge:Ga photoconductor 2D array for 3-THz imaging

Mikio Fujiwara, Norihisa Hiromoto, Hiroshi Shibai, Takanori Hirao, Takao Nakagawa

Proceedings Volume 4130, (2000) https://doi.org/10.1117/12.409839

KEYWORDS: Photoresistors, Electrodes, Germanium, Silicon, Sensors, Cryogenics, Ions, Terahertz radiation, Electronics, Field effect transistors

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Proceedings Article | 28 July 2000 Paper

FIS: far-infrared surveyor on board ASTRO-F (IRIS)

Hidenori Takahashi, Hiroshi Shibai, Mitsunobu Kawada, Takanori Hirao, Toyoki Watabe, Yasushi Tsuduku, Hirohisa Nagata, Hiroshi Utsuno, Yasushi Hibi, Shinya Hirooka, Takao Nakagawa, Hidehiro Kaneda, Shuji Matsuura, Tsuneo Kii, Shin'ichiro Makiuti, Yoshihiko Okamura, Yasuo Doi, Hiroshi Matsuo, Norihisa Hiromoto, Mikio Fujiwara, Manabu Noda

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.393984

KEYWORDS: Sensors, Spectroscopy, Mirrors, Satellites, Detector arrays, Optical filters, Linear filtering, Scanners, Telescopes, IRIS Consortium

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Proceedings Article | 20 June 2000 Paper

New balloon-borne telescope for far-infrared astronomy

Seiko Arimura, Hiroshi Shibai, Mitsunobu Kawada, Atsushi Ito, Makoto Tanaka, Shinya Hirooka, Yasuo Doi, Takao Nakagawa, Masanao Narita, Hidehiro Kaneda, Masahiro Tanaka, Takanao Tohya, Shin'ichiro Makiuti, Yoshihiko Okamura, Haruyuki Okuda, T. Rengarajan

Proceedings Volume 4014, (2000) https://doi.org/10.1117/12.389099

KEYWORDS: Telescopes, Sensors, Infrared telescopes, Electronics, Control systems, Mirrors, Infrared radiation, Fiber optic gyroscopes, Stars, Satellites

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Proceedings Article | 28 August 1998 Paper

HII/L2 mission: future Japanese infrared astronomical mission

Takao Nakagawa, Masahiko Hayashi, Mitsunobu Kawada, Hideo Matsuhara, Toshio Matsumoto, Hiroshi Murakami, Haruyuki Okuda, Takashi Onaka, Hiroshi Shibai, Munetaka Ueno

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324469

KEYWORDS: Telescopes, Space telescopes, Infrared radiation, Infrared telescopes, Infrared astronomy, Astronomy, Satellites, Cryogenics, Liquids, Helium

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Proceedings Article | 21 August 1998 Paper

Evaluation of charge-integrating amplifier with silicon MOSFETs for cryogenic readout

Manabu Noda, Hiroshi Shibai, Toyoki Watabe, Takanori Hirao, Hiroyuki Yoda, Hirohisa Nagata, Takao Nakagawa, Mitsunobu Kawada

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317306

KEYWORDS: Field effect transistors, Cryogenics, Silicon, Amplifiers, Electronics, Sensors, Helium, Infrared imaging, Liquids, Low-intensity laser therapy

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Proceedings Article | 21 August 1998 Paper

Development of stressed Ge:Ga 2D array

Shin'ichiro Makiuti, Yasuo Doi, Hiroshi Shibai, Norihisa Hiromoto, Takao Nakagawa, Mitsunobu Kawada, Kenichi Okumura, Haruyuki Okuda

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317308

KEYWORDS: Sensors, Detector arrays, Satellites, Electrodes, Detector development, Astronomy, Space telescopes, Photoresistors, Telescopes, Resistance

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Proceedings Article | 21 August 1998 Paper

Ge:Ga far-infrared photoconductor 2D direct hybrid array

Norihisa Hiromoto, Mikio Fujiwara, Hiroshi Shibai, Takanori Hirao, Takao Nakagawa, Mitsunobu Kawada

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317304

KEYWORDS: Sensors, Photoresistors, Metals, Indium, Semiconducting wafers, Germanium, Infrared sensors, Absorption, Readout integrated circuits, Infrared detectors

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Proceedings Article | 21 October 1996 Paper

Flight performance of the Far-Infrared Line Mapper (FILM)

Hiroshi Shibai, Takao Nakagawa, Shin'ichiro Makiuti, Hideo Matsuhara, Norihisa Hiromoto, Kenichi Okumura, Yasuo Doi, Takanao Toya, Haruyuki Okuda

Proceedings Volume 2817, (1996) https://doi.org/10.1117/12.255188

KEYWORDS: Sensors, Space telescopes, Calibration, Light sources, Infrared telescopes, Telescopes, Spectroscopy, Spatial resolution, Camera shutters, Galactic astronomy

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Proceedings Article | 14 September 1994 Paper

Eight-element-stressed Ge:Ga linear array: development and performance

Hiroshi Shibai, Haruyuki Okuda, Hiroshi Murakami, Takao Nakagawa, Norihisa Hiromoto, Mikio Fujiwara, Hiroshi Kawamata, Kenichi Okumura, Shin'ichiro Makiuti

Proceedings Volume 2268, (1994) https://doi.org/10.1117/12.185825

KEYWORDS: Photons, Electrodes, Sensors, Semiconducting wafers, Astronomy, Chemical elements, Photoresistors, Bolometers, Copper, Atmospheric sensing

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Proceedings Article | 1 June 1992 Paper

Extreme-UV imaging of the Martian ionosphere and magnetosphere

Masato Nakamura, Koujun Yamashita, Koichiro Tsuruda, Takao Nakagawa, Yoshifumi Saito, Tomoko Nakagawa, Toshihiro Ogawa, Tatsundo Yamamoto

Proceedings Volume 1744, (1992) https://doi.org/10.1117/12.60584

KEYWORDS: Ions, Oxygen, Mars, Space operations, Helium, Extreme ultraviolet, Light scattering, Magnetosphere, Scanners, Plasma

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Proceedings Article | 1 July 1990 Paper

Liquid-helium-cooled Fabry-Perot spectrometer and the frequency switching method for far-infrared spectroscopic observations

Takao Nakagawa, Haruyuki Okuda, Hiroshi Shibai, Hideo Matsuhara, Yukiyasu Kobayashi, Norihisa Hiromoto

Proceedings Volume 1235, (1990) https://doi.org/10.1117/12.19079

KEYWORDS: Spectroscopy, Switching, Fabry–Perot interferometers, Astronomy, Fabry–Perot interferometry, Interferometers, Liquids, Helium, Sensors, Infrared spectroscopy

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Proceedings Article | 1 July 1990 Paper

Balloon-Borne Infrared Telescope for far-infrared spectroscopy

Hiroshi Shibai, Haruyuki Okuda, Takao Nakagawa, Nobuyuki Yajima, Toshinori Maihara, Kohei Mizutani, Hideo Matsuhara, Yukiyasu Kobayashi, Norihisa Hiromoto, Hideki Takami

Proceedings Volume 1235, (1990) https://doi.org/10.1117/12.19080

KEYWORDS: Telescopes, Spectroscopy, Stars, Mirrors, Astronomy, Computing systems, Electronics, Control systems, Space telescopes, Fabry–Perot interferometers

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