NASA NTRS · 20040121137
Poco Graphite Inc. SuperSiC 0.25m Mirror Cryogenic Test Result
Abstract
SuperSiC, a low areal density material, developed by POCO Graphite, have been used as mirror substrate for high energy lasers, laser radar systems, surveillance, telescopes, scan mirrors and satellites. SuperSiC has excellent thermal properties and cryogenic stability. It exhibits exceptional polishability for reflective optics with high strength, stiffness, and excellent thermal conductivity. A lightweighted 0.2-diameter polished SuperSic mirror was tested at cryogenic temperature at NASMSFC. Optical test results showed 6nm cry0 deformation from ambient to 30 degrees Kelvin and little to no change in its surface figure due to cry0 cycling.
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Eng, Ron, Stahl, Phil, Hogue, Bill, Hadaway, James. 2004-01-01. Poco Graphite Inc. SuperSiC 0.25m Mirror Cryogenic Test Result. https://ntrs.nasa.gov/citations/20040121137
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