Material Selection for Far Infrared Telescope Mirrors

被引：4

作者：

East, Matthew ^{[1
]}

Knight, J. Scott ^{[2
]}

Allen, Lynn ^{[1
]}

Mooney, Ted ^{[1
]}

Havey, Keith ^{[1
]}

机构：

[1] Harris Corp, Space & Intelligence Syst, Rochester, NY 14606 USA

[2] Ball Aerosp & Technol Corp, Boulder, CO 80301 USA

来源：

SPACE TELESCOPES AND INSTRUMENTATION 2018: OPTICAL, INFRARED, AND MILLIMETER WAVE | 2018年 / 10698卷

关键词：

Infrared; Mirror; Substrate; Segmented; Materials; Cryogenic; THERMAL-CONDUCTIVITY; METALS;

D O I：

10.1117/12.2314310

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Large visible telescopes present challenging requirements for manufactured surface figure and stability. By comparison, far infrared (IR) telescopes relax many of these requirements by similar to 100x. These relaxed requirements may translate into reduced cost, schedule, mass, and system complexity. This paper explores how different mirror substrate materials might take advantage of these requirements while operating in a cryogenic environment. Primary mirror materials are evaluated for an Origins Space Telescope (OST) concept, using a 9.1 m segmented aperture in a 30 mu m diffraction limited system.

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