Investigation of the possibility of building large light-weight metal mirrors for the long-wave IR spectrum

Details Investigation of the possibility of building large light-weight metal mirrors for the long-wave IR spectrum Investigation of the possibility of building large light-weight metal mirrors for the long-wave IR spectrum

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985opmep..52...13v&link_type=abstract

(Optiko-Mekhanicheskaia Promyshlennost', vol. 52, Mar. 1985, p. 13-16) Soviet Journal of Optical Technology (ISSN 0038-5514), vo

Physics

Aluminum Alloys, Infrared Telescopes, Mirrors, Spaceborne Telescopes, Fabrication, Large Space Structures, Structural Weight, Weight Reduction

Scientific paper

The possibility of fabricating a light-weight main telescope mirror from a specially chosen aluminum alloy is investigated. The construction for such a mirror was developed, and two samples were fabricated and tested. A factor of 10 decrease in weight was achieved; a spherical surface having an aperture D/f-prime = 1/2 and an rms deviation of 0.65 microns was fabricated in 120 hours of machining time. The mirror shape remained stable for a least a month.

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