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Proceedings Paper

Cryogenic Testing Of A Beryllium Mirror
Author(s): George Mikk
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Paper Abstract

This paper describes the vacuum cryogenic test program conducted on a 32-inch by 34-inch elliptical, flat, beryllium mirror over a temperature range of 300°K to 150°K. It discusses the arrangement of optical test equipment for in-situ measurements of mirror optical quality, describes the thermal environmental control and data system, and covers the test setup and operational activity. The optical measurements were made using a scat-ter plate interferometer in conjunction with a 36-inch diameter parabolic mirror and appropriate transfer optics arranged to work over a 65-foot optical path length. The main-tenance of optical alignment and the real-time adjustments of the interferometer were carried out remotely under the test environment using a TV display of the test interferogram.

Paper Details

Date Published: 15 January 1976
PDF: 8 pages
Proc. SPIE 0065, Design, Manufacture and Application of Metal Optics, (15 January 1976); doi: 10.1117/12.954517
Show Author Affiliations
George Mikk, The Perkin-Elmer Corporation (United States)

Published in SPIE Proceedings Vol. 0065:
Design, Manufacture and Application of Metal Optics
William P. Barnes, Editor(s)

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