Dr. Hajime Ezawa
at National Astronomical Observatory of Japan
SPIE Involvement:
Author
Publications (16)

Proceedings Article | 28 August 2024 Presentation + Paper
Hiroshi Matsuo, Hajime Ezawa, Ayako Niwa, Tomohiro Koseki, Norio Okada
Proceedings Volume 13095, 130951L (2024) https://doi.org/10.1117/12.3021092
KEYWORDS: Astronomical interferometry, Quantum interferometry, Photodetectors, Telescopes, Sensors, Quantum receivers, Heterodyning, Quantum limits, Time metrology, Quantum noise

Proceedings Article | 17 August 2024 Poster
Ayako Niwa, Hiroshi Matsuo, Hajime Ezawa, Tomohiro Koseki, Tomonori Tamura
Proceedings Volume PC13102, PC131021K (2024) https://doi.org/10.1117/12.3021254

Proceedings Article | 13 December 2020 Presentation
Hiroshi Matsuo, Hajime Ezawa, Hitoshi Kiuchi, Mareki Honma, Masahiro Ukibe, Go Fujii, Yasuhiro Murata, Makoto Hattori
Proceedings Volume 11453, 1145332 (2020) https://doi.org/10.1117/12.2562333
KEYWORDS: Terahertz technology, Interferometry, Photodetectors, Aerospace engineering, Astronomy, Synthetic apertures, Phase measurement, Sensors, Spatial resolution, Galactic astronomy

Proceedings Article | 28 July 2010 Paper
Proceedings Volume 7733, 77331D (2010) https://doi.org/10.1117/12.857279
KEYWORDS: Antennas, Reflectors, Computer programming, Telescopes, Servomechanisms, Turbulence, Sensors, Motion measurement, Wind measurement, Reflector telescopes

Proceedings Article | 22 July 2008 Paper
Hajime Ezawa, Kotaro Kohno, Ryohei Kawabe, Satoshi Yamamoto, Hirofumi Inoue, Hiroyuki Iwashita, Hiroshi Matsuo, Takeshi Okuda, Tai Oshima, Takeshi Sakai, Kunihiko Tanaka, Nobuyuki Yamaguchi, Grant Wilson, Min Yun, Itziar Aretxaga, David Hughes, Jason Austermann, Thushara Perera, Kimberly Scott, Leonardo Bronfman, Juan Cortes
Proceedings Volume 7012, 701208 (2008) https://doi.org/10.1117/12.789652
KEYWORDS: Telescopes, Receivers, Spectroscopy, Astronomy, Cameras, Submillimeter telescopes, Observatories, Bolometers, Single sideband modulation, Iterated function systems

Proceedings Article | 10 July 2008 Paper
Takashi Miyata, Kentaro Motohara, Shigeyuki Sako, Masuo Tanaka, Takeo Minezaki, Natsuko Mitani, Tsutomu Aoki, Takao Soyano, Toshihiko Tanabe, Kimiaki Kawara, Kotaro Kohno, Ken'ichi Tarusawa, Toshihiko Handa, Mamoru Doi, Yuzuru Yoshii, Hajime Ezawa, Leonardo Bronfman, Maria Ruiz
Proceedings Volume 7012, 701243 (2008) https://doi.org/10.1117/12.788264
KEYWORDS: Clouds, Astronomy, Observatories, Infrared radiation, Infrared astronomy, Telescopes, Satellites, Cameras, Mid-IR, Infrared cameras

Proceedings Article | 8 October 2004 Paper
Proceedings Volume 5498, (2004) https://doi.org/10.1117/12.552550
KEYWORDS: Sensors, Photodetectors, Bolometers, Sapphire, Cryogenics, Cameras, Superconductors, Antennas, Staring arrays, Electronics

Proceedings Article | 28 September 2004 Paper
Hajime Ezawa, Ryohei Kawabe, Kotaro Kohno, Satoshi Yamamoto
Proceedings Volume 5489, (2004) https://doi.org/10.1117/12.551391
KEYWORDS: Telescopes, Receivers, Antennas, Submillimeter telescopes, Spectroscopy, Satellites, Astronomy, Control systems design, Control systems, Galactic astronomy

Proceedings Article | 28 September 2004 Paper
Nobuharu Ukita, Masao Saito, Hajime Ezawa, Bungo Ikenoue, Hideharu Ishizaki, Hiroyuki Iwashita, Nobuyuki Yamaguchi, Takahiro Hayakawa
Proceedings Volume 5489, (2004) https://doi.org/10.1117/12.551523
KEYWORDS: Antennas, Computer programming, Reflectors, Holography, Observatories, Prototyping, Stars, Servomechanisms, Metrology, Telescopes

Proceedings Article | 3 July 2000 Paper
Hajime Ezawa, Masato Ishiguro, Hiroshi Matsuo, Keizo Miyawaki, Naohisa Satou, Nobuharu Ukita
Proceedings Volume 4015, (2000) https://doi.org/10.1117/12.390444
KEYWORDS: Reflectors, Telescopes, Reflector telescopes, Scattering, Antennas, Reflectivity, Aluminum, Extremely high frequency, Light scattering, Observatories

Proceedings Article | 3 July 2000 Paper
Nobuharu Ukita, Ryohei Kawabe, Masato Ishiguro, Hajime Ezawa, Yutaro Sekimoto, Tatsuo Hasegawa, Satoshi Yamamoto, Keizo Miyawaki, Soichi Matsumoto
Proceedings Volume 4015, (2000) https://doi.org/10.1117/12.390409
KEYWORDS: Antennas, Telescopes, Computer programming, Submillimeter telescopes, Temperature metrology, Control systems design, Receivers, Observatories, Optical telescopes, Thermal effects

Proceedings Article | 10 November 1998 Paper
Tadayuki Takahashi, Masaharu Nomachi, Yasushi Fukazawa, Makoto Tashiro, Hajime Ezawa, M. Hamaya, M. Horii, Naoki Isobe, Naoko Iyomoto, Jun Kataoka, Tuneyoshi Kamae, Ginga Kawaguti, Hidetoshi Kubo, S. Kubo, Aya Kubota, Motohide Kokubun, Kazuo Makishima, Keiichi Matsuzaki, Yukari Matsumoto, Tsunefumi Mizuno, Kunishiro Mori, N. Morita, Toshio Murakami, Kazuhiro Nakazawa, H. Obayashi, I. Odagi, Tomohisa Onishi, N. Ota, Hideki Ozawa, Kunihiko Sato, Masahiko Sugiho, Mutsumi Sugizaki, Koji Taguchi, Tadahisa Tamura, Y. Tanaka, Chiharu Tanihata, Yukikatsu Terada, Yasuhiro Uchiyama, Kazutaka Yamaoka, Atsumasa Yoshida
Proceedings Volume 3445, (1998) https://doi.org/10.1117/12.330273
KEYWORDS: Amplifiers, Sensors, Analog electronics, PIN photodiodes, Scintillators, Signal processing, Hard x-rays, Satellites, Genetical swarm optimization, X-rays

Proceedings Article | 7 July 1997 Paper
Hideki Ozawa, Jun Kataoka, Toshio Murakami, Mutsumi Sugizaki, Tadayuki Takahashi, Kazutaka Yamaoka, Hajime Ezawa, Yasushi Fukazawa, Tuneyoshi Kamae, Kazuo Makishima, Tsunefumi Mizuno, Kazuhiro Nakazawa, Satoko Osone, Hirokazu Ikeda, Kiwamu Tsukada, Hidetoshi Kubo
Proceedings Volume 3115, (1997) https://doi.org/10.1117/12.277690
KEYWORDS: PIN photodiodes, Sensors, Analog electronics, Satellites, Electronics, Genetical swarm optimization, Amplifiers, Hard x-rays, Silicon, X-rays

Proceedings Article | 18 October 1996 Paper
Tuneyoshi Kamae, Hajime Ezawa, Yasushi Fukazawa, Masaharu Hirayama, Eriko Idesawa, Naoko Iyomoto, Hidehiro Kaneda, Ginga Kawaguti, Motohide Kokubun, Hidetoshi Kubo, Aya Kubota, Kyoko Matsushita, Keiichi Matsuzaki, Kazuo Makishima, Tsunefumi Mizuno, Kazuhiro Nakazawa, Satoko Osone, H. Obayashi, Yoshitaka Saito, Takayuki Tamura, Masaaki Tanaka, Makoto Tashiro, Jun Kataoka, Toshio Murakami, Naomi Ota, Hideki Ozawa, Mutsumi Sugizaki, Kyoko Takizawa, Tadayuki Takahashi, Kazutaka Yamaoka, Atsumasa Yoshida, Hirokazu Ikeda, Kiwamu Tsukada, Masaharu Nomachi
Proceedings Volume 2806, (1996) https://doi.org/10.1117/12.253993
KEYWORDS: Genetical swarm optimization, Sensors, PIN photodiodes, Scintillators, Hard x-rays, Silicon, Collimators, X-rays, Analog electronics, Diodes

Proceedings Article | 1 September 1995 Paper
Makoto Tashiro, Kazuo Makishima, Hajime Ezawa, Yasushi Fukazawa, Eriko Idesawa, Yoshitaka Ishisaki, Naoko Iyomoto, Tuneyoshi Kamae, Hidehiro Kaneda, Kyoko Matsushita, Keiichi Matsuzaki, Yoshitaka Saito, Yutaro Sekimoto, Takayuki Tamura, Masaharu Hirayama, Manabu Ishida, Hidetoshi Kubo, Kyoko Okada, Tadayuki Takahashi, Yoshihiro Ueda, Koichi Kikuchi, Takaya Ohashi, Noriko Yamasaki, Yoshiki Kohmura, Yasushi Ikebe, Tatehiro Mihara, Takeshi Tsuru, K. Ebisawa, Shuichi Gunji
Proceedings Volume 2518, (1995) https://doi.org/10.1117/12.218370
KEYWORDS: Geographic information systems, Calibration, X-rays, Sensors, X-ray detectors, Lithium, X-ray astronomy, X-ray imaging, Electronics, Scintillation

Proceedings Article | 1 September 1995 Paper
Hidehiro Kaneda, Hajime Ezawa, Masaharu Hirayama, Tuneyoshi Kamae, Hidetoshi Kubo, Keiichi Matsuzaki, Kazuo Makishima, Takanori Ohtsuka, Yoshitaka Saito, Yutaro Sekimoto, Tadayuki Takahashi, Takayuki Tamura, Makoto Tashiro, Naohiko Tsuchida, Toshio Murakami, Mutsumi Sugizaki, Hirokazu Ikeda, Kiwamu Tsukada, Masaharu Nomachi, Shuichi Gunji, Satoshi Miyazaki, Tadahisa Tamura, Noriko Yamasaki, Atsumasa Yoshida
Proceedings Volume 2518, (1995) https://doi.org/10.1117/12.218407
KEYWORDS: PIN photodiodes, Sensors, Scintillators, Silicon, Hard x-rays, X-rays, Crystals, Detector development, Diodes, Signal processing

Showing 5 of 16 publications
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