Dimensionally stable materials for space interferometers

Details Dimensionally stable materials for space interferometers Dimensionally stable materials for space interferometers

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1947..234d&link_type=abstract

Proc. SPIE Vol. 1947, p. 234-248, Spaceborne Interferometry, Robert D. Reasenberg; Ed.

Astronomy and Astrophysics

Astrophysics

Scientific paper

Future NASA missions in astrophysics, Earth observation, and solar system exploration that require optical communication, optical and infrared imaging, or high precision astrometric measurements impose very stringent demands for the dimensional stability of precision structures and science instrument components. The objective of this paper is to identify the major mechanisms that influence the dimensional behavior of common optomechanical materials, to identify the mechanisms that are important for the proposed missions with critical dimensional stability requirements, and to compare the mission requirements with state-of-the- art material and measurement technologies. This paper discusses the tradeoffs of passive vs. active means of achieving the dimensional stability requirements. The reduction of power consumption and mass, the reliability improvements as a function of the dimensional stability of the structural materials for a typical interferometer are calculated.

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