Computer Science – Performance
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1340..111y&link_type=abstract
IN: Cryogenic optical systems and instruments IV; Proceedings of the Meeting, San Diego, CA, July 10-12, 1990 (A92-22851 08-31).
Computer Science
Performance
Cryogenic Cooling, Mirrors, Optical Properties, Surface Distortion, Hysteresis, Performance Tests, Quartz, Silica Glass, Thermal Analysis
Scientific paper
A 50 cm diameter, lightweight, Amersil TO8E, fused-natural-quartz mirror with a single arch cross section was tested at the NASA/Ames Research Center Cryogenic Optics Test Facility to measure cryogenic distortion and hysteresis. The mirror was cooled to 77 K in four serial tests and the mirror figure was measured with a phase-measuring interferometer. On the basis of the repeatability of room temperature and cryogenic optical measurements, it was determined that the Single Arch Mirror had no measurable hysteresis and displayed repeatable cryogenic distortion. The Cryogenic Optics Test Facility, optical and thermal test methods, test results, and measurement accuracy are described.
Augason Gordon C.
Howard Steven D.
Melugin Ramsey K.
Young Jeffrey A.
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