Cylindrical Polishing Technology Development Program.
Final rept. 3 Jun 74-31 Jul 75,
PRATT AND WHITNEY AIRCRAFT WEST PALM BEACH FLA FLORIDA RESEARCH AND DEVELOPMENT CENTER
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Cylindrical optical figures are needed for high energy laser HEL mirrors constructed of molybdenum material. The subject program determined the state-of-the-art for polishing molybdenum to cylindrical optical figures and advanced the technology within funding limits. Cylindrical optical figures of lambda2 lambda approx 0.5 micrometer quality were determined to be state-of-the-art at PWA-FRDC during the early stages of the program, but this quality was subsequently improved to lambda4. It proved to be impractical, if not impossible, to establish quantitative effects of the process variables, or to relate the process to spherical polishing technology. Of the several inspection techniques investigated, the glass test platemonochromatic light interferometer and the noncontact slit interferometer described in the text appeared to be the best available techniques to ensure figure quality specifications are met. Author
- Lasers and Masers
- Ceramics, Refractories and Glass
- Fabrication Metallurgy