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Proceedings Paper

HyperSuprime: imaging optics
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Paper Abstract

We summarize the optical design of the wide-field corrector for HyperSuprime which is being considered as a next generation prime focus camera for Subaru Telescope. Two optical designs are investigated under several design constraints such as image quality, field curvature, focal length, etc. The corrector with 2 degree field of view attains good image quality at the wavelength between 600 nm and 1100 nm although the first lens is large (1.2 m in diameter) and three aspherical surfaces are required. The image quality for shorter wavelength than 600 nm is fair. The incident light blocked at the edge of the field is only 20% and the transmission is more than 80% if the multi-layer coating applied for the current Subaru prime focus corrector is available. The corrector with 1.5 degree field of view is designed as a smaller version of 2 degree corrector. The properties and performance of 1.5 degree corrector resemble those of 2 degree corrector, but 1.5 degree corrector has a merit that the focal plane is flat. The availability of large fused-silica blank up to about 200 kg is promising.

Paper Details

Date Published: 29 June 2006
PDF: 9 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62693E (29 June 2006); doi: 10.1117/12.670721
Show Author Affiliations
Yutaka Komiyama, National Astronomical Observatory of Japan (Japan)
Satoshi Miyazaki, Subaru Telescope (United States)
Yoshiyuki Doi, Subaru Telescope (United States)
Hidehiko Nakaya, Subaru Telescope (United States)
Hisanori Furusawa, Subaru Telescope (United States)
Kunio Takeshi, Okamoto Optics Work, Inc. (Japan)
Kyoji Nariai, Meisei Univ. (Japan)

Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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