Development of a prototype of the Tomo-e Gozen wide-field CMOS camera
Proc. SPIE, pp. 99083P
著者:
- 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 Mori
- Yuki 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
URL:
Abstract:
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$\times$1k CMOS sensor. This camera adopts unconventional designs including a lightweight structure, a nonvacuumed and naturally-air cooled system, front-side-illuminated CMOS sensors with microlens arrays, a sensor alignment along a spherical focal plane of the telescope, and massive readout electronics. To develop technical components necessary for the Tomo-e Gozen and confirm a feasibility of its basic design, we have developed a prototype-model (PM) of the Tomo-e Gozen prior to the final-model (FM). The Tomo-e PM is equipped with eight chips of the CMOS sensor arranged in a line along the RA direction, covering a sky area of 2.0 deg$^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.