1 February 1985 Interferometry At Cryogenic Temperatures
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A test facility for interferometrically evaluating the performance of various optical surfaces at cryogenic temperatures is described. The complete facility utilizes standard commercially available equipment and provides rapid and convenient component assessment in cryovacuum environments. Surface figure distortions in reflection and transmission at 632.8nm have been determined for various optical elements mounted and unmounted at temperatures to 84 K. Data are presented for several elements including metal and fused silica mirrors with convex, concave, and piano surfaces. Also presented are data for several windows, lenses, and prisms of Ge, MgO, and ZnSe.
© (1985) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Howard E. Morrow, Howard E. Morrow, Al S. Hamamoto, Al S. Hamamoto, George K. Ferguson, George K. Ferguson, Phil L. Jeffrey, Phil L. Jeffrey, } "Interferometry At Cryogenic Temperatures", Proc. SPIE 0509, Cryogenic Optical Systems and Instruments I, (1 February 1985); doi: 10.1117/12.944989; https://doi.org/10.1117/12.944989

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