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  • Weitere Quellen  (3)
  • PHYSICAL SCIENCES  (3)
  • 1
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    Corrective Optics For Camera On Telescope (1994)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Assembly of tilted, aspherical circularly symmetric mirrors used as corrective optical subsystem for camera mounted on telescope exhibiting both large spherical wave-front error and inherent off-axis astigmatism. Subsystem provides unobscured camera aperture and diffraction-limited camera performance, despite large telescope aberrations. Generic configuration applied in other optical systems in which aberations deliberately introduced into telescopes and corrected in associated cameras. Concept of corrective optical subsystem provides designer with additional degrees of freedom used to optimize optical system.
    Schlagwort(e): PHYSICAL SCIENCES
    Materialart: NPO-19115 , Laser Tech. Brief.; 2; 4; P. 106
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 2
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    Cameras Would Withstand High Accelerations (1992)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-12
    Beschreibung: Very rugged cameras with all-reflective optics proposed for use in presence of high accelerations. Optics consist of four coaxial focusing mirrors in Cassegrain configuration. Mirrors are conics or aspherics. Optics achromatic,and imaging system overall passes light from extreme ultraviolet to far infrared. Charge-coupled-device video camera, film camera, or array of photodetectors placed at focal plane. Useful as portable imagers subject to rough handling, or instrumentation cameras mounted on severely vibrating or accelerating vehicles.
    Schlagwort(e): PHYSICAL SCIENCES
    Materialart: NPO-18149 , NASA Tech Briefs (ISSN 0145-319X); 16; 6; P. 56
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 3
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    Error-Compensated Telescope (1989)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-12
    Beschreibung: Proposed reflecting telescope includes large, low-precision primary mirror stage and small, precise correcting mirror. Correcting mirror machined under computer control to compensate for error in primary mirror. Correcting mirror machined by diamond cutting tool. Computer analyzes interferometric measurements of primary mirror to determine shape of surface of correcting mirror needed to compensate for errors in wave front reflected from primary mirror and commands position and movement of cutting tool accordingly.
    Schlagwort(e): PHYSICAL SCIENCES
    Materialart: NPO-16869 , NASA Tech Briefs (ISSN 0145-319X); 13; 5; P. 48
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
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