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  • 1
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    Making Optical Correctors by Diamond Turning (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Large Optics Diamond Turning Machine (LODTM) at Lawrence Livermore National Laboratory used to make highly amorphic reflecting wavefront-corrector plates with rms difference between desired and measured reflector surfaces of only 0.075 wave. Measured errors correspond to one standard deviation of uncertainties in digitization and reduction of interferograms of surface. Appears accuracy of LODTM-generated surface exceeds current ability to measure it. Work demonstrates feasibility of single-point diamond turning for manufacture of generalized wavefront-control surfaces or other unusual surfaces desired by optical designers.
    Keywords: FABRICATION TECHNOLOGY
    Type: NPO-16918 , NASA Tech Briefs (ISSN 0145-319X); 11; 8; P. 90
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Attaching Precise Mirrors To Lightweight Supports (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Mirrors formed on optical masters and glued in place. Technique forms precise mirror surfaces on lightweight, rigid, imprecise graphite-composite substrates. Resembles that used to make lightweight replica mirrors and gratings. Layer of parting material deposited on master optical surface of precise desired shape. Parting layer must be very thin to minimize degradation of replica. Enables fabrication of lightweight mirrors of high surface finish suitable for use at short wavelengths.
    Keywords: FABRICATION TECHNOLOGY
    Type: NPO-17164 , NASA Tech Briefs (ISSN 0145-319X); 13; 6; P. 90
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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