Compensation of defective pixels by mechanical shift of an NIR array detector used in the NINJA echelle spectrograph

Kenshi Yanagisawa; Chihiro Tokoku; Kentaro Motohara; Shinobu Ozaki; Yoshito Ono; Yosuke Minowa; Takashi Moriya; Masami Ouchi; Nozomu Tominaga; Masayuki Tanaka; Yutaka Hayano; Yusei Koyama; Sadman Ali; Masaomi Tanaka; Masayuki Akiyama; Tohru Nagao; Yoshiki Matsuoka; Kosuke Kushibiki; Shogo Homan; Akino Yasuda; Tomoya Yukino; Riku Sato; Kensho Tanaka; Tomoyasu Yamamuro; Michitoshi Yoshida

doi:10.1117/12.3016873

18 July 2024 Compensation of defective pixels by mechanical shift of an NIR array detector used in the NINJA echelle spectrograph

Kenshi Yanagisawa, Chihiro Tokoku, Kentaro Motohara, Shinobu Ozaki, Yoshito Ono, Yosuke Minowa, Takashi Moriya, Masami Ouchi, Nozomu Tominaga, Masayuki Tanaka, Yutaka Hayano, Yusei Koyama, Sadman Ali, Masaomi Tanaka, Masayuki Akiyama, Tohru Nagao, Yoshiki Matsuoka, Kosuke Kushibiki, Shogo Homan, Akino Yasuda, Tomoya Yukino, Riku Sato, Kensho Tanaka, Tomoyasu Yamamuro, Michitoshi Yoshida

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130966R (2024) https://doi.org/10.1117/12.3016873
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

In this paper, we present our approach regarding the compensation of defective pixels in the infrared array detector used in the NINJA spectrograph for the Subaru Telescope. While it is typical to use a detector with minimal defective pixels for infrared spectrographs, our HAWAII-2RG detector has a central area with a defective pixel rate of 10%. Therefore, we compensate for defective pixels by mechanically shifting the detector along the focal plane in the direction of dispersion. This approach applies the concept of dithering in imaging observation to a spectrograph, and the shifting mechanism is designed to have a maximum movement distance of 8 mm. We present the expected performance of the compensation and the actual mechanical structure fabricated.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Kenshi Yanagisawa, Chihiro Tokoku, Kentaro Motohara, Shinobu Ozaki, Yoshito Ono, Yosuke Minowa, Takashi Moriya, Masami Ouchi, Nozomu Tominaga, Masayuki Tanaka, Yutaka Hayano, Yusei Koyama, Sadman Ali, Masaomi Tanaka, Masayuki Akiyama, Tohru Nagao, Yoshiki Matsuoka, Kosuke Kushibiki, Shogo Homan, Akino Yasuda, Tomoya Yukino, Riku Sato, Kensho Tanaka, Tomoyasu Yamamuro, and Michitoshi Yoshida "Compensation of defective pixels by mechanical shift of an NIR array detector used in the NINJA echelle spectrograph", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130966R (18 July 2024); https://doi.org/10.1117/12.3016873

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