High-performance astronomical gratings by Canon

被引：13

作者：

Sukegawa, Takashi ^{[1
]}

Sugiyama, Shigeru ^{[2
]}

Kitamura, Tsuyoshi ^{[1
]}

Okura, Yukinobu ^{[2
]}

Koyama, Masatsugu ^{[2
]}

机构：

[1] Canon Inc, Corporate R&D Headquarters, 23-10 Kiyohara Kogyodanchi, Utsunomiya, Tochigi 3213298, Japan

[2] Canon Inc, Prod Engn Headquarters, Saiwai- Ku, Yanagi cho, Kawasaki, Kanagawa JAPAN212860, Japan

来源：

MODERN TECHNOLOGIES IN SPACE-AND GROUND-BASED TELESCOPES AND INSTRUMENTATION II | 2012年 / 8450卷

关键词：

immersion grating; CdTe; CdZnTe; KRS5; diamond cutting;

D O I：

10.1117/12.924956

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Canon is developing wide variety of gratings that can be effective solutions for high precision spectroscopy for the next-generation ground-based and space telescopes. In this paper, we focus on our development of infrared immersion grating, which is one of the most demanding devices among various gratings. We use CdZnTe for mid-infrared (MIR) application and KRS5 for near-infrared (NIR) to MIR application. In particular, CdZnTe immersion grating is the key-device for the MIR high-resolution spectrograph for the space infrared telescope SPICA. Using our diamond cutting (planing) technique, grooves are shaped on the hypotenuse area (30 mm x 10 mm) of a CdZnTe prism with the spacing accuracy of <5 nm (rms) and the surface roughness of <5 nm (rms). We also performed cutting of KRS5 disk and confirmed that excellent grooves can be shaped on this material.

引用

页数：12

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