This paper summarizes the diamond machined finishing and coating of some high performance, lightweight designs using non-exotic substrates to achieve cost effective mirrors. The results indicate that these processes can meet typical aerospace and defense requirements but may also be competitive in some commercial applications.
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Kenneth S. Woodard, Lovell E. Comstock, Leonard Wamboldt, Brian P. Roy, "Cost-effective lightweight mirrors for aerospace and defense," Proc. SPIE 9451, Infrared Technology and Applications XLI, 94511W (26 May 2015);