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Proceedings Paper

Evaluation of large pixel CMOS image sensors for the Tomo-e Gozen wide field camera
Author(s): Yuto Kojima; Shigeyuki Sako; Ryou Ohsawa; Hidenori Takahashi; Mamoru Doi; Naoto Kobayashi; Tsutomu Aoki; Noriaki Arima; Ko Arimatsu; Makoto Ichiki; Shiro Ikeda; Kota Inooka; Yoshifusa Ita; Toshihiro Kasuga; Mitsuru Kokubo; Masahiro Konishi; Hiroyuki Maehara; Noriyuki Matsunaga; Kazuma Mitsuda; Takashi Miyata; Yuki Mori; Mikio Morii; Tomoki Morokuma; Kentaro Motohara; Yoshikazu Nakada; Shin-Ichiro Okumura; Yuki Sarugaku; Mikiya Sato; Toshikazu Shigeyama; Takao Soyano; Masaomi Tanaka; Ken'ichi Tarusawa; Nozomu Tominaga; Tomonori Totani; Seitaro Urakawa; Fumihiko Usui; Junichi Watanabe; Takuya Yamashita; Makoto Yoshikawa
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Paper Abstract

Tomo-e Gozen (Tomo-e) is a wide field optical camera for the Kiso 1.05 m f/3.1 Schmidt telescope operated by the University of Tokyo. Tomo-e is equipped with 84 chips of front-illuminated CMOS image sensors with a microlens array. The field of view is about 20 square degrees and maximum frame rate is 2 fps. The CMOS sensor has 2160x1200 pixels and a size of pixel is 19 microns, which is larger than those of other CMOS sensors. We have evaluated performances of the CMOS sensors installed in Tomo-e. The readout noise is 2.0 e- in 2 fps operations when an internal amplifier gain is set to 16. The dark current is 0.5 e-/sec/pix at room temperature, 290K, which is lower than a typical sky background flux in Tomo-e observations, 50 e-/sec/pix. The efficiency of the camera system peaks at approximately 0.7 in 500 nm.

Paper Details

Date Published: 20 July 2018
PDF: 10 pages
Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 107091T (20 July 2018); doi: 10.1117/12.2311301
Show Author Affiliations
Yuto Kojima, The Univ. of Tokyo (Japan)
Shigeyuki Sako, The Univ. of Tokyo (Japan)
Japan Science and Technology Agency (Japan)
Ryou Ohsawa, The Univ. of Tokyo (Japan)
Hidenori Takahashi, The Univ. of Tokyo (Japan)
Mamoru Doi, The Univ. of Tokyo (Japan)
Naoto Kobayashi, The Univ. of Tokyo (Japan)
Tsutomu Aoki, The Univ. of Tokyo (Japan)
Noriaki Arima, The Univ. of Tokyo (Japan)
Ko Arimatsu, National Astronomical Observatory of Japan (Japan)
Makoto Ichiki, The Univ. of Tokyo (Japan)
Shiro Ikeda, The Institute of Statistical Mathematics (Japan)
Kota Inooka, National Astronomical Observatory of Japan (Japan)
Yoshifusa Ita, Tohoku Univ. (Japan)
Toshihiro Kasuga, Kyoto Univ. (Japan)
Mitsuru Kokubo, Tohoku Univ. (Japan)
Masahiro Konishi, The Univ. of Tokyo (Japan)
Hiroyuki Maehara, Kyoto Univ. (Japan)
Noriyuki Matsunaga, The Univ. of Tokyo (Japan)
Kazuma Mitsuda, Tohoku Univ. (Japan)
Takashi Miyata, The Univ. of Tokyo (Japan)
Yuki Mori, The Univ. of Tokyo (Japan)
Mikio Morii, The Institute of Statistical Mathematics (Japan)
Tomoki Morokuma, The Univ. of Tokyo (Japan)
Kentaro Motohara, The Univ. of Tokyo (Japan)
Yoshikazu Nakada, The Univ. of Tokyo (Japan)
Shin-Ichiro Okumura, Japan Spaceguard Association (Japan)
Yuki Sarugaku, Kyoto Sangyo Univ. (Japan)
Mikiya Sato, The Nippon Meteor Society (Japan)
Toshikazu Shigeyama, The Univ. of Tokyo (Japan)
Takao Soyano, The Univ. of Tokyo (Japan)
Masaomi Tanaka, Tohoku Univ. (Japan)
Ken'ichi Tarusawa, The Univ. of Tokyo (Japan)
Nozomu Tominaga, Konan Univ. (Japan)
Tomonori Totani, The Univ. of Tokyo (Japan)
Seitaro Urakawa, Japan Spaceguard Association (Japan)
Fumihiko Usui, Kobe Univ. (Japan)
Junichi Watanabe, National Astronomical Observatory of Japan (Japan)
Takuya Yamashita, National Astronomical Observatory of Japan (Japan)
Makoto Yoshikawa, Japan Aerospace Exploration Agency (Japan)


Published in SPIE Proceedings Vol. 10709:
High Energy, Optical, and Infrared Detectors for Astronomy VIII
Andrew D. Holland; James Beletic, Editor(s)

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