Dimensional-stability Studies of Candidate Space-telescope Mirror-substrate Materials PDF Download
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Author: John M. Jerke Publisher: ISBN: Category : Optical instruments Languages : en Pages : 36
Book Description
The effects of aging, vacuum exposure, and thermal cycling on the dimensional stability of mirror-substrate materials, fused silica, Cer-Vit, Kanigen-coated beryllium, polycrystalline silicon, and U.L.E. fused silica were investigated. A multiple-beam interferometer was used to determine nonrecoverable surface-shape changes of the 12.7-cm-diameter mirrors with substrates of these materials. Thermal cycling and aging in vacuum produced the largest changes, but only a few were as large as 1/30 wavelength, where the wavelength was 632.8 nm.
Author: John M. Jerke Publisher: ISBN: Category : Optical instruments Languages : en Pages : 36
Book Description
The effects of aging, vacuum exposure, and thermal cycling on the dimensional stability of mirror-substrate materials, fused silica, Cer-Vit, Kanigen-coated beryllium, polycrystalline silicon, and U.L.E. fused silica were investigated. A multiple-beam interferometer was used to determine nonrecoverable surface-shape changes of the 12.7-cm-diameter mirrors with substrates of these materials. Thermal cycling and aging in vacuum produced the largest changes, but only a few were as large as 1/30 wavelength, where the wavelength was 632.8 nm.
Author: John M. Jerke
Author: John M. Jerke
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Author: United States. Superintendent of Documents
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Author: Daniel W. Lester
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Author: George C. Marshall Space Flight Center