Fabrication and testing of very lightweight composite mirrors

Details Fabrication and testing of very lightweight composite mirrors Fabrication and testing of very lightweight composite mirrors

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3356..938c&link_type=abstract

Proc. SPIE Vol. 3356, p. 938-945, Space Telescopes and Instruments V, Pierre Y. Bely; James B. Breckinridge; Eds.

Physics

Optics

2

Scientific paper

We report progress in the development of very lightweight uv-vis-ir mirrors for space- and ground-based applications. The mirrors are made by replication using spaceflight qualified graphite cyanate ester composite materials. We have developed a process that successfully overcomes the problems of fiber print-through, vacuum instability, and appearance of bond lines on the surface. These problems have thwarted previous attempts in the development of composite optics. We describe our process and present some recent results. These include the fabrication of mirrors with highly smooth surfaces, low mid-frequency ripple, and areal density 2 kg/m(superscript 2) at 60 cm aperture. We also present data on bond lines and active optical figure control.

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