Dr. Takashi Hattori Profile

Dr. Takashi Hattori

Sr. Instrument and Research specialist at Subaru Telescope NAOJ

SPIE Involvement:

Author

Publications (37)

Proceedings Article | 30 August 2022 Presentation + Paper

Presentation + Paper

AO3000 at Subaru: combining for the first time a NIR WFS using First Light’s C-RED ONE and ALPAO’s 64x64 DM

Julien Lozi, Kyohoon Ahn, Christophe Clergeon, Vincent Deo, Olivier Guyon, Takashi Hattori, Yosuke Minowa, Shogo Nishiyama, Yoshito Ono, Sébastien Vievard

Proceedings Volume 12185, 1218533 (2022) https://doi.org/10.1117/12.2630634

KEYWORDS: Near infrared, Modulation, Beam splitters, Adaptive optics, Cameras, Stars, Wavefront sensors, Signal to noise ratio, Telescopes, Modulators

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Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

High contrast and high angular imaging at Subaru Telescope

Olivier Guyon, Kyohoon Ahn, Masayuki Akiyama, Thayne Currie, Vincent Deo, Takshi Hattori, Tomoyuki Kudo, Julen Lozi, Yosuke Minowa, Yoshito Ono, Nour Skaf, Motohide Tamura, Sebastien Vievard

Proceedings Volume 12185, 121856J (2022) https://doi.org/10.1117/12.2630534

KEYWORDS: Adaptive optics, Telescopes, Near infrared, Wavefront sensors, Imaging systems, Astronomy, Spectrographs, Infrared telescopes, Exoplanets, Coronagraphy

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Proceedings Article | 30 August 2022 Presentation + Paper

Presentation + Paper

ULTIMATE-Subaru: GLAO preliminary design overview

Yosuke Minowa, Yoshito Ono, Yoko Tanaka, Hiroshige Yoshida, Koki Terao, Yusei Koyama, Sadman Ali, Ichi Tanaka, Takashi Hattori, Hirofumi Okita, Yutaka Hayano, Shin Oya, Kentaro Motohara, Kenshi Yanagisawa, Michitoshi Yoshida, Masayuki Akiyama, Tadayuki Kodama, Hajime Ogane, Masahiro Konishi, Noelia Martinez Rey, Nicholas Herrald, Céline d'Orgeville, François Rigaut, Israel Vaughn, David Chandler, Dionne Haynes, Warrick Schofield, Shiang-Yu Wang, Chi-Yi Chou, Masahiko Kimura

Proceedings Volume 12185, 1218521 (2022) https://doi.org/10.1117/12.2629749

KEYWORDS: Telescopes, Mirrors, Control systems, Stars, Camera shutters, Adaptive optics, Wavefront sensors, Optical instrument design, Near infrared, Monochromatic aberrations

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Optical design for Subaru Nasmyth Beam Switcher

Jessica Zheng, Nick Binos, Peter Gillingham, Helen McGregor, Scott Smedley, Jon Lawrence, Takashi Hattori, Yosuke Minowa, Olivier Guyon

Proceedings Volume 12182, 121823E (2022) https://doi.org/10.1117/12.2629745

KEYWORDS: Mirrors, Switches, Beam splitters, Tolerancing, Wavefronts, Optical design, Adaptive optics, Telescopes, Image quality, Spherical lenses

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Instrumentation at the Subaru Telescope

Takashi Hattori, Yosuke Minowa, Hirofumi Okita, Julien Rousselle, Michitoshi Yoshida

Proceedings Volume 12184, 1218402 (2022) https://doi.org/10.1117/12.2629780

KEYWORDS: Telescopes, Spectrographs, Adaptive optics, Imaging systems, Cameras, Near infrared, Laser guide stars, Astronomical imaging, Wavefront sensors, Astronomy

Read Abstract +

Proceedings Article | 11 June 2021 Open Access

Open Access

Poster + Presentation + Paper

Novel gratings for astronomical observations II

Noboru Ebizuka, Takayuki Okamoto, Yutaka Yamagata, Minoru Sasaki, Ichi Tanaka, Takashi Hattori, Yusuke Nakauchi, Makio Nishimaki, Kazuya Yamamoto, Makoto Okada, Kazuto Saiki

Proceedings Volume 11852, 1185263 (2021) https://doi.org/10.1117/12.2600051

Read Abstract +

Proceedings Article | 18 May 2021 Open Access

Open Access

Paper

Developing the wide-spectral coverage, very high-efficiency grisms for MOIRCS on Subaru Telescope (Erratum)

Ichi Tanaka, Noboru Ebizuka, Kentaro Motohara, Tadayuki Kodama, Takashi Hattori, Koji Omata, Hidenori Takahashi, Masahiro Konishi, Yoko Tanaka

Proceedings Volume 11451, 1145174 (2021) https://doi.org/10.1117/12.2601442

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Performances of an integral field unit for FOCAS on the Subaru telescope

Shinobu Ozaki, Takashi Hattori, Kentaro Aoki, Chien-Hsiu Lee, Mitsuhiro Fukushima, Hikaru Iwashita, Kenji Mitsui, Yoko Tanaka, Toshihiro Tsuzuki, Norio Okada, Yoshiyuki Obuchi, Satoshi Miyazaki, Takuya Yamashita

Proceedings Volume 11447, 114475T (2020) https://doi.org/10.1117/12.2560602

KEYWORDS: Telescopes, Spectrographs, Galactic astronomy, Optical imaging, Cameras, Image quality, Absorption, Mirrors, Coating

Read Abstract +

Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

ULTIMATE-Subaru: conceptual design of WFI, a near-infrared wide field imager

Kentaro Motohara, Yusuke Minowa, Ichi Tanaka, Takashi Hattori, Yusei Koyama, Masahiro Konishi, Kenshi Yanagisawa, Ikuru Iwata, Shiang-Yu Wang, Richard C. Chou, Masahiko Kimura, John Pazder

Proceedings Volume 11447, 114470N (2020) https://doi.org/10.1117/12.2560324

KEYWORDS: Imaging systems, Optical filters, Telescopes, Sensors, Adaptive optics, Deformable mirrors, Mirrors, Turbulence, Astronomical imaging, Spectrographs

Read Abstract +

Proceedings Article | 13 December 2020 Paper

Paper

Instrumentation at the Subaru Selescope

Takashi Hattori, Naruhisa Takato, Yosuke Minowa, Hirofumi Okita

Proceedings Volume 11447, 1144702 (2020) https://doi.org/10.1117/12.2561962

KEYWORDS: Imaging systems, Adaptive optics, Computing systems, Spectrographs, Telescopes, Metrology, Cameras, Infrared imaging, Thermography, Infrared radiation

Read Abstract +

Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

ULTIMATE-Subaru: system performance modeling of GLAO and wide-field NIR instruments

Yosuke Minowa, Yusei Koyama, Kenshi Yanagisawa, Kentaro Motohara, Ichi Tanaka, Yoshito Ono, Takashi Hattori, Christophe Clergeon, Yutaka Hayano, Masayuki Akiyama, Tadayuki Kodama, Céline d'Orgeville, Francois Rigaut, Shiang-Yu Wang, Michitoshi Yoshida

Proceedings Volume 11450, 114500O (2020) https://doi.org/10.1117/12.2561950

KEYWORDS: Near infrared, Performance modeling, Systems modeling, Imaging systems, Imaging spectroscopy, Cesium, Telescopes, Near infrared spectroscopy, Spectroscopes, Infrared telescopes

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

Developing the wide-spectral coverage, very high-efficiency grisms for MOIRCS on Subaru Telescope

Ichi Tanaka, Noboru Ebizuka, Kentaro Motohara, Tadayuki Kodama, Takashi Hattori, Koji Omata, Hidenori Takahashi, Masahiro Konishi, Yoko Tanaka

Proceedings Volume 11451, 114515A (2020) https://doi.org/10.1117/12.2561176

KEYWORDS: Telescopes, Astronomy, Manufacturing, Prisms, Imaging systems, Astronomical imaging, Spectrographs, Spectroscopy, Galactic astronomy, Near infrared

Read Abstract +

Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Overview of AO activities at Subaru Telescope

Yoshito Ono, Yosuke Minowa, Olivier Guyon, Christophe Clergeon, Etsuko Mieda, Julien Lozi, Takashi Hattori, Masayuki Akiyama

Proceedings Volume 11448, 114480K (2020) https://doi.org/10.1117/12.2561139

KEYWORDS: Adaptive optics, Telescopes, Near infrared, Imaging systems, Exoplanets, Control systems, Fiber lasers, Visible radiation, Imaging spectroscopy, Near infrared spectroscopy

Read Abstract +

Proceedings Article | 3 January 2020 Paper

Paper

ULTIMATE-Subaru: enhancing the Subaru's wide-field capability with GLAO

Yosuke Minowa, Yusei Koyama, Yoshito Ono, Ichi Tanaka, Takashi Hattori, Christophe Clergeon, Masayuki Akiyama, Tadayuki Kodama, Kentaro Motohara, François Rigaut, Céline d'Orgeville, Shiang-Yu Wang, Michitoshi Yoshida

Proceedings Volume 11203, 112030G (2020) https://doi.org/10.1117/12.2560539

KEYWORDS: Near infrared, Imaging systems, Imaging spectroscopy, Telescopes, Cesium, Near infrared spectroscopy, Spectroscopes, Infrared telescopes, Adaptive optics, Spatial resolution

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Proceedings Article | 20 September 2018 Paper

Paper

Subaru AO188 upgrade phase 1: integration of the new real-time system

Christophe Clergeon, Yosuke Minowa, Olivier Guyon, Yoshito Ono, Etsuko Mieda, Nour Skaf, Hiroshige Yoshida, Yukata Hayano, Takashi Hattori, Kiaina Schubert, Ananya Sahoo, Julien Lozi, Sebastien Vievard

Proceedings Volume 10703, 1070337 (2018) https://doi.org/10.1117/12.2314254

KEYWORDS: Adaptive optics, Avalanche photodetectors, Real-time computing, Electronics, Telescopes, Wavefront sensors, Actuators, Control systems, Human-machine interfaces, Matrices

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Proceedings Article | 12 July 2018 Paper

Paper

Current status of the laser guide star upgrade at Subaru Telescope

Etsuko Mieda, Yoko Tanaka, Matthew Wung, Yosuke Minowa, Christophe Clergeon, Yoshito Ono, Takashi Hattori, Yutaka Hayano, Masayuki Akiyama, Francois Rigaut, Celine d'Orgeville

Proceedings Volume 10703, 107033P (2018) https://doi.org/10.1117/12.2314093

KEYWORDS: Telescopes, Adaptive optics, Laser guide stars, Fiber lasers, Laser applications, Lasers

Read Abstract +

Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

A conceptual design study for Subaru ULTIMATE GLAO

François Rigaut, Yosuke Minowa, Masayuki Akiyama, Yoshito Ono, Visa Korkiakoski, Nick Herrald, Gaston Gausachs, Christophe Clergeon, Shiang-Yu Wang, Céline d'Orgeville, Jordan Davies, Yusei Koyama, Ikuru Iwata, Tadayuki Kodama, Kentrao Motohara, Yutaka Hayano, Ichi Tanaka, Takashi Hattori, Michitoshi Yoshida

Proceedings Volume 10703, 1070324 (2018) https://doi.org/10.1117/12.2314085

KEYWORDS: Telescopes, Adaptive optics, Spectrographs, Wavefront sensors, Monte Carlo methods, Near infrared, Imaging systems, Stars, Astronomical imaging, Turbulence

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Paper

Near-infrared adaptive optics imaging- and spectro-polarimetry with the infrared camera and spectrograph of the Subaru Telescope

Makoto Watanabe, Tae-Soo Pyo, Hiroshi Terada, Takashi Hattori, Yutaka Hayano, Yosuke Minowa, Shin Oya, Masayuki Hattori, Tomoyuki Kudo, Mikio Morii, Jun Hashimoto, Motohide Tamura

Proceedings Volume 10702, 107023V (2018) https://doi.org/10.1117/12.2311969

KEYWORDS: Polarimetry, Adaptive optics, Astronomy, Spectrographs, Near infrared

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Paper

Thermal-infrared adaptive optics imaging- and spectro-polarimetry with the Infrared Camera and Spectrograph (IRCS) for the Subaru Telescope

Hiroshi Terada, Mitsuhiko Honda, Takashi Hattori, Tomoyuki Kudo, Jun Hashimoto, Makoto Watanabe

Proceedings Volume 10702, 107022Y (2018) https://doi.org/10.1117/12.2313303

KEYWORDS: Polarimetry, Telescopes, Polarization, Infrared telescopes, Infrared radiation, Stars, Adaptive optics, Wave plates, Imaging spectroscopy, Prisms

Read Abstract +

Proceedings Article | 19 June 2017 Open Access

Open Access

Presentation + Paper

Novel gratings for next-generation instruments of astronomical observations

N. Ebizuka, T. Okamoto, M. Takeda, T. Hosobata, Y. Yamagata, M. Sasaki, M. Uomoto, T. Shimatsu, S. Sato, N. Hashimoto, I. Tanaka, T. Hattori, S. Ozaki, W. Aoki

Proceedings Volume 10233, 102330M (2017) https://doi.org/10.1117/12.2264892

KEYWORDS: Diffraction gratings, Diffraction, Telescopes, Silicon, Space telescopes, Prisms, Astronomical telescopes, Spectrographs, Polarization, Fiber Bragg gratings, Gold, Reflectors, Ultraviolet radiation

Read Abstract +

Proceedings Article | 9 August 2016 Paper

Paper

Detector upgrade of Subaru's Multi-object Infrared Camera and Spectrograph (MOIRCS)

Maximilian Fabricius, Joshua Walawender, Nobuo Arimoto, David Cook, Brian Elms, Yasuhito Hashiba, Takashi Hattori, Yen-Sang Hu, Ikuru Iwata, Tetsuo Nishimura, Koji Omata, Philip Tait, Naruhisa Takato, Ichi Tanaka, Shiang-Yu Wang, Mark Weber, Matthew Wung

Proceedings Volume 9908, 990828 (2016) https://doi.org/10.1117/12.2231417

KEYWORDS: Sensors, Astronomical imaging, Infrared sensors, Spectrographs, Infrared cameras, Electronics, Cryogenics, Sensors, Infrared sensors, Astronomical imaging, Coating, Molybdenum, Optical benches

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Proceedings Article | 9 August 2016 Paper

Paper

CCD system upgrading of the Kyoto3DII and integral field spectroscopic observation with the new system

Kazuma Mitsuda, Yasuhito Hashiba, Yosuke Minowa, Yutaka Hayano, Hajime Sugai, Atsushi Shimono, Kazuya Matsubayashi, Takashi Hattori, Yukiko Kamata, Shinobu Ozaki, Mamoru Doi, Shigeyuki Sako

Proceedings Volume 9908, 99082M (2016) https://doi.org/10.1117/12.2232685

KEYWORDS: Telescopes, Charge-coupled devices, Adaptive optics, Galactic astronomy, Iterated function systems, Stars, Camera shutters, Lamps, Quantum efficiency, Astronomy

Read Abstract +

Proceedings Article | 3 August 2016 Paper

Paper

An overview of current and future instrumentation at the Subaru telescope

Yosuke Minowa, Naruhisa Takato, Ikuru Iwata, Takashi Hattori

Proceedings Volume 9908, 990806 (2016) https://doi.org/10.1117/12.2233318

KEYWORDS: Spectrographs, Telescopes, Adaptive optics, Astronomical imaging, Imaging systems, Adaptive optics, Astronomical imaging, Wavefront sensors, Cameras, Near infrared, Mirrors, Galactic astronomy

Read Abstract +

Proceedings Article | 22 July 2016 Paper

Paper

Novel diffraction gratings for next generation spectrographs with high spectral dispersion

N. Ebizuka, T. Okamoto, T. Hosobata, Y. Yamagata, M. Sasaki, M. Uomoto, T. Shimatsu, S. Sato, N. Hashimoto, I. Tanaka, T. Hattori, S. Ozaki, W. Aoki

Proceedings Volume 9912, 99122Z (2016) https://doi.org/10.1117/12.2231949

KEYWORDS: Diffraction gratings, Space telescopes, Diffraction, Liquid crystals, Telescopes, Spectrographs, Polarization, Mirrors, Refractive index, Reflection

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Proceedings Article | 28 July 2014 Paper

Paper

Development of a slicer integral field unit for the existing optical spectrograph FOCAS: progress

Shinobu Ozaki, Yoko Tanaka, Takashi Hattori, Kenji Mitsui, Mitsuhiro Fukushima, Norio Okada, Yoshiyuki Obuchi, Toshihiro Tsuzuki, Satoshi Miyazaki, Takuya Yamashita

Proceedings Volume 9151, 915149 (2014) https://doi.org/10.1117/12.2054838

KEYWORDS: Mirrors, Telescopes, Spectrographs, Zemax, Prototyping, Spherical lenses, Vignetting, Image quality, Sensors, Cameras

Read Abstract +

Proceedings Article | 21 July 2014 Paper

Paper

ULTIMATE-SUBARU: project status

Yutaka Hayano, Masayuki Akiyama, Takashi Hattori, Ikuru Iwata, Tadayuki Kodama, Olivier Lai, Yosuke Minowa, Yoshito Ono, Shin Oya, Koki Takiura, Ichi Tanaka, Yoko Tanaka, Nobuo Arimito

Proceedings Volume 9148, 91482S (2014) https://doi.org/10.1117/12.2055042

KEYWORDS: Galactic astronomy, Telescopes, Wavefront sensors, Mirrors, Space telescopes, Adaptive optics, Near infrared, Imaging systems, Stars, Spectrographs

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Proceedings Article | 13 September 2012 Paper

Paper

Development of a slicer integral field unit for the existing optical imaging spectrograph FOCAS

Shinobu Ozaki, Yoko Tanaka, Takashi Hattori, Kenji Mitsui, Mitsuhiro Fukusima, Norio Okada, Yoshiyuki Obuchi, Satoshi Miyazaki, Takuya Yamashita

Proceedings Volume 8450, 84501L (2012) https://doi.org/10.1117/12.924959

KEYWORDS: Mirrors, Telescopes, Off axis mirrors, Vignetting, Spectrographs, Surface finishing, Prototyping, Reflectivity, Spherical lenses, Glasses

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Proceedings Article | 30 September 2004 Paper

Paper

Test observations of the Kyoto Tridimensional Spectrograph II at the University of Hawaii 88-in and Subaru Telescopes

Hajime Sugai, Takashi Hattori, Atsushi Kawai, Shinobu Ozaki, George Kosugi, Hiroshi Ohtani, Tadashi Hayashi, Tsuyoshi Ishigaki, Motomi Ishii, Minoru Sasaki, Atsushi Shimono, Yoshiko Okita, Jun Sudo, Norihide Takeyama

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.550987

KEYWORDS: Telescopes, Iterated function systems, Spectrographs, Stars, Fabry–Perot interferometers, Charge-coupled devices, Astronomy, Observatories, Microlens array, Interfaces

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Proceedings Article | 12 June 2003 Paper

Paper

Development of high-performance negative-tone resists for 193-nm lithography

Takashi Hattori, Yoshiyuki Yokoyama, Kaori Kimura, Ryoko Yamanaka, Toshihiko Tanaka, Hiroshi Fukuda

Proceedings Volume 5039, (2003) https://doi.org/10.1117/12.485203

KEYWORDS: Polymers, Lithography, Phase shifts, Carbon, Etching, Polymer thin films, Photomasks, Distortion, Transparency, Polymerization

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Proceedings Article | 24 August 2001 Paper

Paper

ArF negative resist system using androsterone structure with delta-hydroxy acid for 100-nm phase shifting lithography

Yoshiyuki Yokoyama, Takashi Hattori, Kaori Kimura, Toshihiko Tanaka, Hiroshi Shiraishi

Proceedings Volume 4345, (2001) https://doi.org/10.1117/12.436901

KEYWORDS: Polymers, Lithography, Phase shifts, Photomasks, Distortion, Scanning electron microscopy, Photography, Phase shifting, Silicon, Semiconducting wafers

Read Abstract +

Proceedings Article | 16 August 2000 Paper

Paper

Kyoto tridimensional spectrograph II: progress

Hajime Sugai, Hiroshi Ohtani, Shinobu Ozaki, Takashi Hattori, Motomi Ishii, Tsuyoshi Ishigaki, Tadashi Hayashi, Minoru Sasaki, Norihide Takeyama

Proceedings Volume 4008, (2000) https://doi.org/10.1117/12.395514

KEYWORDS: Fabry–Perot interferometers, Spectrographs, Iterated function systems, Microlens, Diffraction, Charge-coupled devices, Microlens array, Point spread functions, Telescopes, Optical filters

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Proceedings Article | 11 June 1999 Paper

Paper

Suppression of resist pattern deformation on SiON bottom antireflective layer in deep-UV lithography

Ryoko Yamanaka, Takashi Hattori, Toshiyuki Mine, Keiko Hattori, Toshihiko Tanaka, Tsuneo Terasawa

Proceedings Volume 3678, (1999) https://doi.org/10.1117/12.350202

KEYWORDS: Silicon, Photoemission spectroscopy, Lithography, Chemical vapor deposition, Deep ultraviolet, Reflectance spectroscopy, Spectroscopy, Oxides, Polymers, Chemical species

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Proceedings Article | 11 June 1999 Paper

Paper

Microswelling-free negative resists for ArF excimer laser lithography utilizing acid-catalyzed intramolecular esterification

Takashi Hattori, Yuko Tsuchiya, Yoshiyuki Yokoyama, Hiroaki Oizumi, Taku Morisawa, Atsuko Yamaguchi, Hiroshi Shiraishi

Proceedings Volume 3678, (1999) https://doi.org/10.1117/12.350223

KEYWORDS: Polymers, Excimer lasers, Distortion, Lithography, Absorption, Resistance, Etching, Transparency, Resolution enhancement technologies, Infrared spectroscopy

Read Abstract +

Proceedings Article | 9 July 1998 Paper

Paper

Kyoto Tridimensional Spectrograph I

Hiroshi Ohtani, Tsuyoshi Ishigaki, Hiroyuki Maemura, Tadashi Hayashi, Minoru Sasaki, Shinobu Ozaki, Takashi Hattori, Kentaro Aoki, Hajime Sugai

Proceedings Volume 3355, (1998) https://doi.org/10.1117/12.316842

KEYWORDS: Fabry–Perot interferometers, Spectrographs, Telescopes, Charge-coupled devices, Microlens array, Galactic astronomy, Iterated function systems, Temperature metrology, Glasses, Optical filters

Read Abstract +

Development of a spectrograph for area spectroscopic observations of faint extended objects in optical spectral region (Ohtani et al., 1994) was completed and the instrument is now in commission at the 188 cm telescope of the Okayama Astrophysical Observatory. With this instrument can be made four different kinds of spectroscopy which are switched to one another by remote operation. The four modes are filter imaging at several narrow (or wide) bands, slit scan in the long-slit spectrograph mode, imaging Fabry-Perot interferometer observation, and integral field spectroscopy (IFS). The first two modes of these are conventional types. Two Fabry-Perot etalons of Queensgate Instruments, resolving power R equals 300 (tunable narrow band filter) and 7000, are available. Prior to development of the spectrograph, characteristics of these etalon were examined in detail by laboratory experiments. Effective finess and nonuniformity were measured. Further, behaviors of drift of transmitting wavelength with variations of ambient temperature was carefully examined. Based on the results of the experiment, temperature of the etalon in the spectrograph at the telescope is stabilized within plus or minus 0.5 degrees Celsius to attain high performance that drift of the transmitting wavelength does not exceed one tenth of the width of the Airy profile during observations. For the IFS mode, the type of the TIGER spectrograph is employed. Our spectrograph has a dual-channel enlarging optics, one channel acquiring a target object and the other an 'uncontaminated' sky field well apart from the target. The microlenses array is shared by the target and the sky. With the 188 cm telescope a 9' X 15' (7 X 11 lenslets corresponding 1'.3 square) target field and a smaller sky field 3'.7 apart are observed simultaneously. Spectra on the CCD partially superpose each other with adjacent spectra because appreciable deviations in the microlenses array format exist from an exact square array. However, energy loss due to truncation of superposed part is not serious. Total quantum efficiency of the system is 2 percent at peak. Some results of astronomical applications for active galaxies are presented. Results of super-wide-field observations with an objective of a short focal length is also demonstrated.

Proceedings Article | 9 July 1998 Paper

Paper

Kyoto Tridimensional Spectrograph II

Hajime Sugai, Hiroshi Ohtani, Tsuyoshi Ishigaki, Tadashi Hayashi, Shinobu Ozaki, Takashi Hattori, Motomi Ishii, Minoru Sasaki, Norihide Takeyama

Proceedings Volume 3355, (1998) https://doi.org/10.1117/12.316800

KEYWORDS: Spectrographs, Telescopes, Iterated function systems, Charge-coupled devices, Fabry–Perot interferometers, Microlens, Microlens array, Collimators, Adaptive optics, Imaging systems

Read Abstract +

SPIE Journal Paper | 1 October 1993

Chemical amplification positive deep ultraviolet resist by means of partially tetrahydropyranyl-protected polyvinylphenol

Takashi Hattori, Leo Schlegel, Akira Imai, Nobuaki Hayashi, Takumi Ueno

OE, Vol. 32, Issue 10, (October 1993) https://doi.org/10.1117/12.10.1117/12.145971

KEYWORDS: Deep ultraviolet, Chlorine, Lithography, Infrared spectroscopy, Excimer lasers, Absorbance, Absorption, Ultraviolet radiation, Scanning electron microscopy, Optical lithography

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Proceedings Article | 15 September 1993 Paper

Paper

Chemical amplification positive deep-UV resist using partially tetrahydropyranyl-protected polyvinylphenol

Takashi Hattori, Leo Schlegel, Akira Imai, Nobuaki Hayashi, Takumi Ueno

Proceedings Volume 1925, (1993) https://doi.org/10.1117/12.154747

KEYWORDS: Deep ultraviolet, Lithography, Infrared spectroscopy, Absorbance, Excimer lasers, Absorption, Transmittance, Spectroscopy, Silicon films, Ultraviolet radiation

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Showing 5 of 37 publications

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