Evaluation of large pixel CMOS image sensors for the Tomo-e Gozen wide field camera

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 MiyataYuki 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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

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 2160 × 1200 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.

Original languageEnglish
Title of host publicationHigh Energy, Optical, and Infrared Detectors for Astronomy VIII
EditorsAndrew D. Holland, James Beletic
PublisherSPIE
ISBN (Print)9781510619715
DOIs
Publication statusPublished - 2018 Jan 1
EventHigh Energy, Optical, and Infrared Detectors for Astronomy VIII 2018 - Austin, United States
Duration: 2018 Jun 102018 Jun 13

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10709
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherHigh Energy, Optical, and Infrared Detectors for Astronomy VIII 2018
CountryUnited States
CityAustin
Period18/6/1018/6/13

Keywords

  • CMOS sensor
  • Kiso observatory
  • Schmidt telescope
  • optical
  • wide field

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Kojima, Y., Sako, S., Ohsawa, R., Takahashi, H., Doi, M., Kobayashi, N., Aoki, T., Arima, N., Arimatsu, K., Ichiki, M., Ikeda, S., Inooka, K., Ita, Y., Kasuga, T., Kokubo, M., Konishi, M., Maehara, H., Matsunaga, N., Mitsuda, K., ... Yoshikawa, M. (2018). Evaluation of large pixel CMOS image sensors for the Tomo-e Gozen wide field camera. In A. D. Holland, & J. Beletic (Eds.), High Energy, Optical, and Infrared Detectors for Astronomy VIII [107091T] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10709). SPIE. https://doi.org/10.1117/12.2311301