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24 September 2012 Hyper Suprime-Cam: filter exchange unit and shutter
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Abstract
We have developed a filter exchange unit (FEU) and a shutter of Hyper Suprime-Cam (HSC). FEU consists of two parts; the alignment mechanism of the filter in the optical path and a jukebox of the filters. The alignment mechanism can guarantee 10 μm position stability with respect to the focal plane CCDs. On the exchange sequence, a motorized cart grabs and pushes the filter from the jukebox. Each jukebox has 3 slots and we have two identical jukeboxes. The operation is fully automated and the entire exchange sequence takes 16 minutes. Also, we developed the focal-plane shutter with 1,030 mm diameter envelope and 60 mm thickness while having 600 mm aperture. We report the detail of design and implementation of the shutter and FEU, and installation procedure of FEU.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fumihiro Uraguchi, Shiang-Yu Wang, Yutaka Komiyama, Eric J. Y. Liaw, Chi-Fang Chiu, Hsin-Yo Chen, Cheng-Lin Ho, Tsang-Chih Lai, Yao-Cheng Lee, Dun-Zen Jeng, Satoru Iwamura, Yukiko Kamata, Satoshi Kawanomoto, Satoshi Miyazaki, Tomoki Morokuma, Hidehiko Nakaya, and Yousuke Utsumi "Hyper Suprime-Cam: filter exchange unit and shutter", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 844663 (24 September 2012); doi: 10.1117/12.927240; https://doi.org/10.1117/12.927240
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