Prof. Koji S. Kawabata Profile

Prof. Koji S. Kawabata

Professor at Hiroshima Univ

SPIE Involvement:

Author

Publications (28)

Proceedings Article | 12 March 2021 Paper

AA Tau polarimetric observation using Kanata HONIR instrument

Wei Liu, Koji Kawabata, Hiroshi Akitaya

Proceedings Volume 11763, 117630K (2021) https://doi.org/10.1117/12.2585776

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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 Presentation + Paper

Development of an optical and near-infrared telescope onboard the HiZ-GUNDAM mission

Kohji Tsumura, Daisuke Yonetoku, Koji Kawabata, Shuji Matsuura, Hirofumi Noda, Yuji Urata, Yuu Niino, Kei Sano, Akisato Ohashi, Akihiro Doi, Hiroshi Akitaya, Akihiro Miyasaka, Miku Kurimata, Yoshikatsu Kawata, Makoto Arimoto, Hirofumi Okita

Proceedings Volume 11443, 114430R (2020) https://doi.org/10.1117/12.2560654

KEYWORDS: Telescopes, Infrared telescopes, Optical instrument design, X-ray telescopes, Astronomy, Gamma radiation, X-rays, Satellites, Infrared detectors, Mirrors

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Proceedings Article | 13 December 2020 Poster + Paper

(KFISP) Kottamia Faint Imaging Spectro-Polarimeter: opto-mechanical design and performance analysis

Yosry Azzam, Gamal Ali, F. I. Elnagahy, I. Zead, Nasser Ahmed, Hamed Ismail, Somaya Saad, A. Shokry, Ali Takey, Y. H. Hendy, Peter Mack, Michitoshi Yoshida, Koji Kawabata, Hiroshi Akitaya, M. Darwish, Ahmed Fouad, Islam Helmy, Nohamed Ismail, Doaa Elsayed, Ola Ali, Mohamed Abdel-sabour, Mona Molham, A. Haroon, A. M. I. Osman, M. Hamdy, I. Issa, M. Abo-Elala, A. Essam

Proceedings Volume 11447, 114479U (2020) https://doi.org/10.1117/12.2561664

KEYWORDS: Optomechanical design, Polarimetry, Cameras, Calibration, Telescopes, Collimators, Optical instrument design, Astronomical telescopes, Astronomy, Observatories

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Proceedings Article | 13 December 2020 Poster + Paper

The HinOTORI Telescope and its remote control system

Wei Liu, Yousuke Utsumi, Koji Kawabata, Mahito Sasada, Yongqiang Yao, Yingxi Zuo, Zheng Lou, Shengcai Shi

Proceedings Volume 11451, 1145157 (2020) https://doi.org/10.1117/12.2560801

KEYWORDS: Control systems, Telescopes, Imaging systems, Electromagnetism, Domes, Cameras

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Proceedings Article | 13 December 2020 Poster + Paper

Development of multi-conjugate adaptive optics system for monitoring of solar system planets

Makoto Watanabe, Shin Oya, Shuhei Goda, Jumpei Nakamoto, Keisuke Teraji, Hiroaki Ishikoso, Shouta Morisada, Hiroshi Kamakari, Fuka Mizukose, Hiromasa Yamane, Kanta Sagisaka, Masaru Yokoyama, Koji Kawabata

Proceedings Volume 11448, 1144877 (2020) https://doi.org/10.1117/12.2561196

KEYWORDS: Adaptive optics, Planets, Solar system, Telescopes, Wavefront sensors, Imaging systems, Spatial resolution, Microelectromechanical systems, Deformable mirrors, Wavefronts

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Proceedings Article | 13 December 2020 Presentation + Paper

High-redshift gamma-ray burst for unraveling the Dark Ages Mission: HiZ-GUNDAM

Daisuke Yonetoku, Tatehiro Mihara, Akihiro Doi, Takanori Sakamoto, Kohji Tsumura, Kunihito Ioka, Yusuke Amaya, Makoto Arimoto, Teruaki Enoto, Takeru Fujii, Hatsune Goto, Shuichi Gunji, Junko Hiraga, Hirokazu Ikeda, Nobuyuki Kawai, Shunsuke Kurosawa, Jin Li, Yoshitomo Maeda, Ikuyuki Mitsuishi, Toshio Murakami, Yujin Nakagawa, Naoki Ogino, Masanori Ohno, Tatsuya Sawano, Kensyo Sei, Motoko Serino, Satoshi Sugita, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Toru Tanimori, Makoto Tashiro, Hiroshi Tomida, Hyeongsoon Wang, Tomohiro Yamaguchi, Ayumi Yamamoto, Kazutaka Yamaoka, Makoto Yamauchi, Yoichi Yatsu, Atsumasa Yoshida, Daito Yuhi, Hiroshi Akitaya, Akihiko Fukui, Yoshifusa Ita, Hidehiro Kaneda, Koji Kawabata, Yoshikatsu Kawata, Miku Kurimata, Toshio Matsumoto, Shuji Matsuura, Akihiro Miyasaka, Kentaro Motohara, Norio Narita, Hirofumi Noda, Akisato Ohashi, Hirofumi Okita, Kei Sano, Masaomi Tanaka, Yuji Urata, Takehiko Wada, Hikaru Yamaguchi, Kenshi Yanagisawa, Michitoshi Yoshida, Katsuaki Asano, Kohei Inayoshi, Susumu Inoue, Hirotaka Ito, Hideyuki Izumiura, Norita Kawanaka, Tomoya Kinugawa, Shota Kisaka, Kenta Kiuchi, Jin Matsumoto, Akira Mizuta, Kohta Murase, Hiroki Nagakura, Shigehiro Nagataki, Yoshikazu Nakada, Takashi Nakamura, Yuu Niino, Yudai Suwa, Keitaro Takahashi, Takahiro Tanaka, Kenji Toma, Tomonori Totani, Ryo Yamazaki, Jun'ichi Yokoyama

Proceedings Volume 11444, 114442Z (2020) https://doi.org/10.1117/12.2560603

KEYWORDS: Gamma radiation, Astronomy, X-ray optics, Satellite communications, Satellites, Observatories, X-ray detectors, X-ray telescopes, X-ray imaging, X-rays

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Proceedings Article | 13 December 2020 Presentation + Paper

Development of an optical photon counting imager using a monolithic Geiger APD array

Takeshi Nakamori, Yuga Ouchi, Risa Ogihara, Toshio Terasawa, Yuhei Kato, Shinpei Shibata, Hiroshi Akitaya, Koji Kawabata

Proceedings Volume 11454, 1145418 (2020) https://doi.org/10.1117/12.2560925

KEYWORDS: Photon counting, Imaging systems, Avalanche photodetectors, Prototyping, Astronomical imaging, Astronomy, Image resolution, Avalanche photodiodes, Sensor performance, Sensors

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Proceedings Article | 17 April 2020 Paper

Best focus approach of HinOTORI telescope

Wei Liu, Hiroki Nagashima, Koji Kawabata, Mahito Sasada, Yongqiang Yao, Shengcai Shi

Proceedings Volume 11455, 114551T (2020) https://doi.org/10.1117/12.2561919

KEYWORDS: Telescopes, Observatories, Mirrors, Cameras, Alternate lighting of surfaces, Astronomy, Sensors, CCD cameras, Astronomical telescopes, LIGO

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Proceedings Article | 12 July 2018 Paper

Development of a compact readout system for optical CCD in Higashi-Hiroshima Observatory

Wei Liu, Shigeyuki Sako, Koji Kawabata, Sheng-Cai Shi, Michitoshi Yoshida , Yousuke Utsumi

Proceedings Volume 10709, 107091X (2018) https://doi.org/10.1117/12.2311910

KEYWORDS: Charge-coupled devices, Clocks, Signal processing, Observatories, Telescopes, Amplifiers, Field programmable gate arrays, Astronomy, Image processing, Linear filtering

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Proceedings Article | 21 November 2017 Open Access

Grism and immersion grating for space telescope

Noboru Ebizuka, Kiko Oka, Akiko Yamada, Mami Ishikawa, Masako Kashiwagi, Kashiko Kodate, Yasuhiro Hirahara, Shuji Sato, Koji Kawabata, Moriaki Wakaki, Shin-ya Morita, Tomoyuki Simizu, Shaohui Yin, Hitoshi Omori, Masanori Iye

Proceedings Volume 10568, 105681M (2017) https://doi.org/10.1117/12.2308014

KEYWORDS: Diffraction gratings, Diffraction, Prisms, Spectrographs, Refractive index, Spectroscopy, Space telescopes, Germanium, Spectral resolution, Prototyping

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Proceedings Article | 6 August 2014 Paper

HONIR: an optical and near-infrared simultaneous imager, spectrograph, and polarimeter for the 1.5-m Kanata telescope

Hiroshi Akitaya, Yuki Moritani, Takahiro Ui, Takeshi Urano, Yuma Ohashi, Koji Kawabata, Asami Nakashima, Mahito Sasada, Kiyoshi Sakimoto, Tatsuya Harao, Hisashi Miyamoto, Rieko Matsui, Ryosuke Itoh, Katsutoshi Takaki, Issei Ueno, Takashi Ohsugi, Hidehiko Nakaya, Takuya Yamashita, Michitoshi Yoshida

Proceedings Volume 9147, 91474O (2014) https://doi.org/10.1117/12.2054577

KEYWORDS: Polarization, Polarimetry, Imaging spectroscopy, Telescopes, Sensors, Prisms, Spectroscopy, Stars, Spectroscopes, CCD image sensors

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Proceedings Article | 28 July 2014 Paper

Development of a new readout system for the near-infrared detector of HONIR

Takahiro Ui, Shigeyuki Sako, Takuya Yamashita, Hiroshi Akitaya, Koji Kawabata, Hidehiko Nakaya, Yuki Moritani, Ryosuke Itoh, Katsutoshi Takaki, Takeshi Urano, Issei Ueno, Takashi Ohsugi, Michitoshi Yoshida, Hikaru Nakao, Yasuhito Hashiba

Proceedings Volume 9147, 91476C (2014) https://doi.org/10.1117/12.2055388

KEYWORDS: Sensors, Linear filtering, Multiplexers, Electrons, Mirrors, Analog electronics, Clocks, Detector development, Imaging spectroscopy, Astronomy

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Proceedings Article | 24 July 2014 Paper

Development and calibration of fine collimators for the ASTRO-H Soft Gamma-ray Detector

T. Mizuno, D. Kimura, Y. Fukazawa, S. Furui, K. Goto, T. Hayashi, K. Kawabata, T. Kawano, Y. Kitamura, H. Shirakawa, T. Tanabe, K. Makishima, K. Nakajima, K. Nakazawa, T. Fukuyama, Y. Ichinohe, K. Ishimura, M. Ohta, T. Sato, T. Takahashi, Y. Uchida, S. Watanabe, K. Ishibashi, K. Sakanobe, H. Matsumoto, T. Miyazawa, H. Mori, M. Sakai, H. Tajima

Proceedings Volume 9144, 91445F (2014) https://doi.org/10.1117/12.2054649

KEYWORDS: X-rays, Fluorescence correlation spectroscopy, Transmittance, Sensors, Visible radiation, Calibration, Collimators, Gamma radiation, Cameras, X-ray optics

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Proceedings Article | 24 July 2014 Paper

High-z gamma-ray bursts for unraveling the dark ages mission HiZ-GUNDAM

Daisuke Yonetoku, Tatehiro Mihara, Tatsuya Sawano, Hirokazu Ikeda, Atsushi Harayama, Shunsuke Takata, Kazuki Yoshida, Hiroki Seta, Asuka Toyanago, Yasuaki Kagawa, Kentaro Kawai, Nobuyuki Kawai, Takanori Sakamoto, Motoko Serino, Shunsuke Kurosawa, Shuichi Gunji, Toru Tanimori, Toshio Murakami, Yoichi Yatsu, Kazutaka Yamaoka, Atsumasa Yoshida, Koji Kawabata, Toshio Matsumoto, Koji Tsumura, Shuji Matsuura, Mai Shirahata, Hirofumi Okita, Kensi Yanagisawa, Michitoshi Yoshida, Kentaro Motohara

Proceedings Volume 9144, 91442S (2014) https://doi.org/10.1117/12.2055041

KEYWORDS: Sensors, Near infrared, X-ray imaging, X-rays, Image sensors, Capacitance, Telescopes, Satellites, Gamma radiation, Analog electronics

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Proceedings Article | 24 September 2012 Paper

First light observation of GIGMICS (germanium immersion grating mid-infrared cryogenic spectrograph) by Kanata 1.5-m Telescope at Higashi-Hiroshima Observatory

Yasuhiro Hirahara, Keishin Aoki, Kanako Ohta, Sho Shibata, Tsuyoshi Hirao, Yoshio Tatamitani, Noboru Ebizuka, Koji Kawabata, Michitoshi Yoshida, Makoto Uemura, Takashi Oosugi, Kentaro Kawaguchi, Ryuji Fujimori, Hiroki Ohiwa, Hisayuki Nagahiro

Proceedings Volume 8446, 84463Y (2012) https://doi.org/10.1117/12.925734

KEYWORDS: Telescopes, Germanium, Spectroscopy, Venus, Sensors, Spectrographs, Staring arrays, Infrared spectroscopy, Astronomy, Absorption

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Proceedings Article | 24 September 2012 Paper

An optical and near-infrared multipurpose instrument HONIR

Kiyoshi Sakimoto, Hiroshi Akitaya, Takuya Yamashita, Koji Kawabata, Hidehiko Nakaya, Hisashi Miyamoto, Tatsuya Harao, Ryosuke Itoh, Risako Matsui, Yuki Moritani, Asami Nakashima, Takashi Ohsugi, Mahito Sasada, Katsutoshi Takaki, Issei Ueno, Takahiro Ui, Takeshi Urano, Michitoshi Yoshida

Proceedings Volume 8446, 844673 (2012) https://doi.org/10.1117/12.926425

KEYWORDS: Sensors, Telescopes, Polarimetry, Imaging spectroscopy, Infrared imaging, Cameras, Optical benches, Spectroscopes, Optical components, Beam splitters

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Proceedings Article | 25 July 2008 Paper

First light of UT 15-band dichroic-mirror camera

Mamoru Doi, Junji Hayano, Hiroyuki Utsunomiya, Yutaka Ihara, Kouichi Tokita, Shigeyuki Sako, Sadanori Okamura, Naohiro Takanashi, Tomoki Morokuma, Hisanori Furusawa, Hidehiko Nakaya, Yutaka Komiyama, Masafumi Yagi, Norio Okada, Akira Arai, Makoto Uemura, Koji Kawabata, Takuya Yamashita, Takashi Ohsugi, Hiroko Ito, Hanindyo Kuncarayakti, Masanao Abe, Sunao Hasegawa, Norihide Takeyama, Tomoyasu Yamamuro, Satoru Iwamura

Proceedings Volume 7014, 70140F (2008) https://doi.org/10.1117/12.788554

KEYWORDS: Mirrors, Charge-coupled devices, Telescopes, Cameras, Lenses, Collimators, Astronomy, Imaging systems, Spectrographs, Stars

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Proceedings Article | 23 July 2008 Paper

Novel direct vision prism and Wollaston prism assembly for diffraction limit applications

Noboru Ebizuka, Hideo Yokota, Fumiyoshi Kajino, Koji Kawabata, Masanori Iye, Shuji Sato

Proceedings Volume 7018, 70184S (2008) https://doi.org/10.1117/12.788528

KEYWORDS: Prisms, Diffraction, Refractive index, Spectroscopy, Glasses, Crystals, Diffraction gratings, Solids, Fourier transforms, Titanium dioxide

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Proceedings Article | 23 July 2008 Paper

Application of zero-expansion pore-free ceramics to a mirror of an astronomical telescope

Hiroshi Akitaya, Masanori Iye, Kiichi Okita, Motoyasu Sato, Hiroyuki Matsuo, Takeshi Itazu, Takeshi Uno, Masao Yamaguchi, Zen-ei Tanaka, Takuya Yamashita, Koji Kawabata, Makoto Uemura, Mikio Kurita

Proceedings Volume 7018, 70183H (2008) https://doi.org/10.1117/12.788884

KEYWORDS: Mirrors, Ceramics, Telescopes, Glasses, Astronomical telescopes, Aspheric lenses, Polishing, Manufacturing, Surface finishing, Lens grinding equipment

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Proceedings Article | 11 July 2008 Paper

Wide-field one-shot optical polarimeter: HOWPol

Koji Kawabata, Osamu Nagae, Shingo Chiyonobu, Hiroyuki Tanaka, Hidehiko Nakaya, Mariko Suzuki, Yukiko Kamata, Satoshi Miyazaki, Kazuyoshi Hiragi, Hisashi Miyamoto, Masayuki Yamanaka, Akira Arai, Takuya Yamashita, Makoto Uemura, Takashi Ohsugi, Mizuki Isogai, Yoshiaki Ishitobi, Shuji Sato

Proceedings Volume 7014, 70144L (2008) https://doi.org/10.1117/12.788569

KEYWORDS: Polarimetry, Charge-coupled devices, CCD cameras, Signal to noise ratio, Imaging systems, Telescopes, Astronomy, Photometry, Cameras, Collimators

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Proceedings Article | 6 July 2006 Paper

Novel immersion grating, VPH grating, and quasi-Bragg grating

Noboru Ebizuka, Keiko Oka, Akiko Yamada, Masako Kashiwagi, Kashiko Kodate, Koji Kawabata, Mariko Uehara, Chie Nagashima, Kotaro Ichiyama, Takashi Ichikawa, Tomoyuki Shimizu, Shinya Morita, Yutaka Yamagata, Hitoshi Omori, Hitoshi Tokoro, Yasuhiro Hirahara, Shuji Sato, Masanori Iye

Proceedings Volume 6273, 62732G (2006) https://doi.org/10.1117/12.671100

KEYWORDS: Diffraction gratings, Spectrographs, Prisms, Diffraction, Telescopes, Space telescopes, Reflection, Mirrors, Spectral resolution, Astronomy

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Proceedings Article | 7 March 2003 Paper

Multi-object spectroscopy of FOCAS: software and its performance

Yoshihiko Saito, Youichi Ohyama, Nobunari Kashikawa, Michitoshi Yoshida, Toshiyuki Sasaki, George Kosugi, Tadafumi Takata, Yasuhiro Shimizu, Motoko Inata, Kiichi Okita, Kentaro Aoki, Kazuhiro Sekiguchi, Koji Kawabata, Ryo Asai, Hiroko Taguchi, Noboru Ebizuka, Yasushi Yadoumaru, Tomohiko Ozawa, Masanori Iye

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.462588

KEYWORDS: Molybdenum, Telescopes, Distortion, Charge-coupled devices, Target acquisition, Astronomical imaging, Stars, Imaging spectroscopy, Laser cutting, Observatories

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Proceedings Article | 7 March 2003 Paper

Properties of FOCAS optical components

Koji Kawabata, Noboru Ebizuka, Toshiyuki Sasaki, Kazuhiro Sekiguchi, Masanori Iye, Kentaro Aoki, Ryo Asai, Motoko Inata, Nobunari Kashikawa, George Kosugi, Youichi Ohyama, Kiichi Okita, Tomohiko Ozawa, Yoshihiko Saito, Yasuhiro Shimizu, Hiroko Taguchi, Tadafumi Takata, Yasushi Yadoumaru, Michitoshi Yoshida

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461923

KEYWORDS: Optical components, Prisms, Telescopes, Imaging spectroscopy, Spectral resolution, Polarimetry, Charge-coupled devices, Optical filters, Spectroscopy, Manufacturing

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Proceedings Article | 14 February 2003 Paper

Development of the high-resolution spectropolarimeter: LIPS

Yuji Ikeda, Hiroshi Akitaya, Kentaro Matsuda, Koji Kawabata, Munezo Seki, Ryuko Hirata, Akira Okazaki

Proceedings Volume 4843, (2003) https://doi.org/10.1117/12.458833

KEYWORDS: Laser induced plasma spectroscopy, Polarization, Polarimetry, Telescopes, Charge-coupled devices, Wave plates, Astronomy, Spectral resolution, Stars, Adhesives

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Proceedings Article | 30 January 2003 Paper

Development of a volume phase holographic (VPH) grism for visible to near-infrared instruments of the 8.2-m Subaru telescope

Noboru Ebizuka, Keiko Oka, Akiko Yamada, Mami Watanabe, Kayo Shimizu, Kashiko Kodate, Masami Kawabata, Takashi Teranishi, Koji Kawabata, Masanori Iye

Proceedings Volume 4842, (2003) https://doi.org/10.1117/12.458041

KEYWORDS: Diffraction gratings, Prisms, Diffraction, Astronomy, Spectroscopy, Holography, Telescopes, Refractive index, Volume holography, Modulation

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Proceedings Article | 16 August 2000 Paper

FOCAS: faint object camera and spectrograph for the Subaru Telescope

Nobunari Kashikawa, Motoko Inata, Masanori Iye, Koji Kawabata, Kiichi Okita, George Kosugi, Youichi Ohyama, Toshiyuki Sasaki, Kazuhiro Sekiguchi, Tadafumi Takata, Yasuhiro Shimizu, Michitori Yoshida, Kentaro Aoki, Yoshihiko Saito, Ryo Asai, Hiroko Taguchi, Noboru Ebizuka, Tomohiko Ozawa, Yasushi Yadoumaru

Proceedings Volume 4008, (2000) https://doi.org/10.1117/12.395414

KEYWORDS: Charge-coupled devices, Telescopes, Imaging spectroscopy, Cameras, Optical components, Spectroscopes, Spectrographs, Distortion, Spectroscopy, Collimators

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Proceedings Article | 16 June 2000 Paper

Software structure and its performance on FOCAS instrument control, a MOS design, and an analyzing package

Michitoshi Yoshida, Yasuhiro Shimizu, Toshiyuki Sasaki, George Kosugi, Tadafumi Takata, Kazuhiro Sekiguchi, Nobunari Kashikawa, Kentaro Aoki, Ryo Asai, Youichi Ohyama, Koji Kawabata, Motoko Inata, Yoshihiko Saito, Hiroko Taguchi, Noboru Ebizuka, Yasushi Yadoumaru, Tomohiko Ozawa, Masanori Iye

Proceedings Volume 4009, (2000) https://doi.org/10.1117/12.388394

KEYWORDS: Control systems, Molybdenum, Process control, Charge-coupled devices, Telescopes, Java, Human-machine interfaces, Astronomy, Fourier transforms, Observatories

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Showing 5 of 28 publications

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