Development of a prototype of the Tomo-e Gozen wide-field CMOS camera

Shigeyuki Sako, Ryou Osawa, Hidenori Takahashi, Yuki Kikuchi, Mamoru Doi, Naoto Kobayashi, Tsutomu Aoki, Ko Arimatsu, Makoto Ichiki, Shiro Ikeda, Yoshifusa Ita, Toshihiro Kasuga, Hideyo Kawakita, Mitsuru Kokubo, Hiroyuki Maehara, Noriyuki Matsunaga, Hiroyuki Mito, Kazuma Mitsuda, Takashi Miyata, Kiyoshi MoriYuki Mori, Mikio Morii, Tomoki Morokuma, Kentaro Motohara, Yoshikazu Nakada, Kentaro Osawa, Shin Ichiro Okumura, Hiroki Onozato, Yuki Sarugaku, Mikiya Sato, Toshikazu Shigeyama, Takao Soyano, Masaomi Tanaka, Yuki Taniguchi, Ataru Tanikawa, Ken'Ichi Tarusawa, Nozomu Tominaga, Tomonori Totani, Seitaro Urakawa, Fumihiko Usui, Junichi Watanabe, Jumpei Yamaguchi, Makoto Yoshikawa

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

13 Citations (Scopus)


The Tomo-e Gozen is an extremely wide-field optical camera for the Kiso 1.0-m Schmidt telescope. It is capable of taking consecutive frames with a field-of-view of 20 deg 2 and a sub-second time-resolution, which are achieved by 84 chips of 2k×1k CMOS sensor. This camera adopts unconventional designs including a lightweight structure, a nonvacuumed and naturally-air cooled system, front-side-illuminated CMOS sensors with microlens arrays, a sensor alignment along a spherical focal plane of the telescope, and massive readout electronics. To develop technical components necessary for the Tomo-e Gozen and confirm a feasibility of its basic design, we have developed a prototype-model (PM) of the Tomo-e Gozen prior to the final-model (FM). The Tomo-e PM is equipped with eight chips of the CMOS sensor arranged in a line along the RA direction, covering a sky area of 2.0 deg 2. The maximum frame rate is 2 fps. The total data production rate is 80 MByte sec -1 at 2 fps, corresponding to approximately 3 TByte night-1. After laboratory testing, we have successfully obtained consecutive movie data at 2 fps with the Tomo-e PM in the first commissioning run conducted in the end of 2015.

Original languageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy VI
EditorsLuc Simard, Christopher J. Evans, Hideki Takami
ISBN (Electronic)9781510601956
Publication statusPublished - 2016
EventGround-Based and Airborne Instrumentation for Astronomy VI - Edinburgh, United Kingdom
Duration: 2016 Jun 262016 Jun 30

Publication series

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


OtherGround-Based and Airborne Instrumentation for Astronomy VI
Country/TerritoryUnited Kingdom


  • Big data
  • CMOS sensor
  • Kiso observatory
  • Movie data
  • Optical
  • Schmidt telescope
  • Time domain
  • 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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