Properties of FOCAS optical components

Koji S. Kawabata; Noboru Ebizuka; Toshiyuki Sasaki; Kazuhiro Sekiguchi; Masanori Iye; Kentaro Aoki; Ryo Asai; Motoko Inata; Nobunari Kashikawa; George Kosugi; Youichi Ohyama; Kiichi Okita; Tomohiko Ozawa; Yoshihiko Saito; Yasuhiro Shimizu; Hiroko Taguchi; Tadafumi Takata; Yasushi Yadoumaru; Michitoshi Yoshida

doi:10.1117/12.461923

7 March 2003 Properties of FOCAS optical components

Koji S. Kawabata, Noboru Ebizuka, Toshiyuki Sasaki, Kazuhiro Sekiguchi, Masanori Iye, Kentaro Aoki, Ryo Asai, Motoko Inata, Nobunari Kashikawa, George Kosugi, Youichi Ohyama, Kiichi Okita, Tomohiko Ozawa, Yoshihiko Saito, Yasuhiro Shimizu, Hiroko Taguchi, Tadafumi Takata, Yasushi Yadoumaru, Michitoshi Yoshida

Author Affiliations +

Proceedings Volume 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes; (2003) https://doi.org/10.1117/12.461923
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The Faint Object Camera and Spectrograph, FOCAS, is a Cassegrain optical instrument of Subaru telescope. For its versatility, FOCAS has many optical components such as grisms, filters, and polarizers. They are inserted in the collimated beam section of 451 mm length. For the large pupil (90 mm in diameter) and the wide field of view (6 arcmin in diameter) of FOCAS, rigorous efforts were made in developing, manufacturing and assembling these components. The resultant performance of the instrument is quite stable and is almost as high as that expected from the design values. In the text, overall characteristics of each optical element is described.

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Koji S. Kawabata, Noboru Ebizuka, Toshiyuki Sasaki, Kazuhiro Sekiguchi, Masanori Iye, Kentaro Aoki, Ryo Asai, Motoko Inata, Nobunari Kashikawa, George Kosugi, Youichi Ohyama, Kiichi Okita, Tomohiko Ozawa, Yoshihiko Saito, Yasuhiro Shimizu, Hiroko Taguchi, Tadafumi Takata, Yasushi Yadoumaru, and Michitoshi Yoshida "Properties of FOCAS optical components", Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); https://doi.org/10.1117/12.461923

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