Cryogenic Performance of High-efficiency Germanium Immersion Grating

被引：2

作者：

Sarugaku, Yuki ^{[1
]}

Ikeda, Yuji ^{[2
,3
]}

Kaji, Sayumi ^{[4
]}

Kobayashi, Naoto ^{[1
,2
,5
]}

Sukegawa, Takashi ^{[6
]}

Arasaki, Takayuki ^{[3
]}

Kondo, Sohei ^{[3
]}

Nakanishi, Kenshi ^{[3
]}

Yasui, Chikako ^{[7
]}

Kawakita, Hideyo ^{[1
,3
]}

机构：

[1] Univ Tokyo, Inst Astron, Kiso Observ, 10762-30 Mitaka, Kiso, Nagano 3970101, Japan

[2] Kyoto Sangyo Univ, Koyama Astron Observ, Lab Infrared High Resolut Spect LIH, Kita Ku, Kyoto 603855, Japan

[3] Photocoding, Sakyo Ku, 460-102 Iwakura Nakamachi, Kyoto 6060025, Japan

[4] Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kita Ku, Kyoto 6038555, Japan

[5] Univ Tokyo, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan

[6] Canon Inc, Opt Prod Operat, 20-2 Kiyohara Kogyodanchi, Utsunomiya, Tochigi 3213292, Japan

[7] NAOJ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

来源：

GROUND-BASED AND AIRBORNE TELESCOPES VI | 2016年 / 9906卷

关键词：

immersion grating; infrared; high-resolution spectroscopy; VINROUGE; TMT;

D O I：

10.1117/12.2233626

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Immersion gratings will play important roles for infrared astronomy in the next generation. We have been developing immersion gratings with a variety of kinds of materials and have succeeded in fabricating a high-efficiency germanium (Ge) immersion grating with both a reflection coating on the grating surface and an AR coating on the entrance surface. The grating will be installed in a K-, L-, and M-bands (2-5um) high-resolution (R=80,000) spectrograph, VINROUGE, which is a prototype for the TMT MIR instrument. In this paper, we report the preliminary results on the evaluation of the Ge immersion grating. We confirmed that the peak absolute diffraction efficiency was in the range of 70-80 %, which was as expected from the design, at both room and cryogenic temperatures.

引用

页数：4

共 5 条

[1]

Arasaki T., 2016, P SPIE UNPUB, V9908

[2] Machined immersion grating with theoretically predicted diffraction efficiency [J].

Ikeda, Yuji ;

Kobayashi, Naoto ;

Sarugaku, Yuki ;

Sukegawa, Takashi ;

Sugiyama, Shigeru ;

Kaji, Sayumi ;

Nakanishi, Kenshi ;

Kondo, Sohei ;

Yasui, Chikako ;

Kataza, Hirokazu ;

Nakagawa, Takao ;

Kawakita, Hideyo .

APPLIED OPTICS, 2015, 54 (16) :5193-5202

[3]

Kaji S., 2016, P SPIE UNPUB, V9912

[4]

Sukegawa T., 2016, P SPIE UNPUB, V9912

[5] High-performance astronomical gratings by Canon [J].

Sukegawa, Takashi ;

Sugiyama, Shigeru ;

Kitamura, Tsuyoshi ;

Okura, Yukinobu ;

Koyama, Masatsugu .

MODERN TECHNOLOGIES IN SPACE-AND GROUND-BASED TELESCOPES AND INSTRUMENTATION II, 2012, 8450

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