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Proceedings Paper

Interferometry At Cryogenic Temperatures
Author(s): Howard E. Morrow; Al S. Hamamoto; George K. Ferguson; Phil L. Jeffrey
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Paper Abstract

A test facility for interferometrically evaluating the performance of various optical surfaces at cryogenic temperatures is described. The complete facility utilizes standard commercially available equipment and provides rapid and convenient component assessment in cryovacuum environments. Surface figure distortions in reflection and transmission at 632.8nm have been determined for various optical elements mounted and unmounted at temperatures to 84 K. Data are presented for several elements including metal and fused silica mirrors with convex, concave, and piano surfaces. Also presented are data for several windows, lenses, and prisms of Ge, MgO, and ZnSe.

Paper Details

Date Published: 1 February 1985
PDF: 19 pages
Proc. SPIE 0509, Cryogenic Optical Systems and Instruments I, (1 February 1985); doi: 10.1117/12.944989
Show Author Affiliations
Howard E. Morrow, Lockheed Palo Alto Research Laboratory (United States)
Al S. Hamamoto, Lockheed Palo Alto Research Laboratory (United States)
George K. Ferguson, Lockheed Palo Alto Research Laboratory (United States)
Phil L. Jeffrey, Lockheed Palo Alto Research Laboratory (United States)


Published in SPIE Proceedings Vol. 0509:
Cryogenic Optical Systems and Instruments I
Ramsey K. Melugin, Editor(s)

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