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  • 1
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    Unknown
    A variable beam splitter for lasers (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Variable ratio beam splitter design and operation for lasers, using birefringent optics
    Keywords: MASERS
    Type: ; ADEMIE DES SCIENCES
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Major element composition of Luna 20 glasses. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Ten per cent of the 50 to 150-micron size fraction of Luna 20 soil is glass. A random suite of 270 of these glasses has been analyzed by electron microprobe techniques. The major glass type forms a strong cluster around a mean value corresponding to Highland basalt (anorthositic gabbro) with 70% normative feldspar. Minor glass groups have the compositions of mare basalts and of low-K Fra Mauro type basalts. The glass data indicate that Highland basalt is the major rock type in the highlands north of Mare Fecunditatis.
    Keywords: CHEMISTRY
    Type: Earth and Planetary Science Letters; 17; Dec. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Multiple pass reimaging optical system (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An optical imaging system for enabling nonabsorbed light imaged onto a photodetective surface to be collected and reimaged one or more times onto that surface in register with the original image. The system includes an objective lens, one or more imaging lenses, one or more retroreflectors and perhaps a prism for providing optical matching of the imaging lens focal planes to the photo detective surface.
    Keywords: PHYSICS, GENERAL
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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