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Proceedings Paper

Effects of thermal gradients on the Mars observer camera primary mirror
Author(s): Roger W. Applewhite; Arthur R. Telkamp
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Paper Abstract

The paper discusses the effect of thermal gradients on the optical performance of the primary mirror of Mars Observer Camera (MOC), which will be launched on the Mars Observer spacecraft in September 1992. It was found that mild temperature gradients can have a large effect on the mirror surface figure, even for relatively low coefficient-of-thermal-expansion materials. However, in the case of the MOC primary mirror, it was found that the radius of curvature (ROC) of the reflective surface of the mirror changed in a nearly linear fashion with the radial temperature gradient, with little additional aberration. A solid-state ROC controller using the thermal gradient effect was implemented and verified.

Paper Details

Date Published: 16 September 1992
PDF: 11 pages
Proc. SPIE 1690, Design of Optical Instruments, (16 September 1992); doi: 10.1117/12.138015
Show Author Affiliations
Roger W. Applewhite, Altadena Instruments Corp. (United States)
Arthur R. Telkamp, OCA Applied Optics, Inc. (United States)


Published in SPIE Proceedings Vol. 1690:
Design of Optical Instruments
David M. Aikens; Victor L. Genberg; Gary C. Krumweide; Michael J. Thomas, Editor(s)

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