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  • 1
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    OPTICAL PATTERNS OF THERMALLY SELF‐DEFOCUSED LIGHT (1967)
    American Institute of Physics
    Details
    Publication Date: 1967-08-01
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics
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    PAPER CURRENT
  • 2
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    Holographic data storage crystals for LDEF (A0044) (1984)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Electro-optic holographic recording systems were developed. The spaceworthiness of electro-optic crystals for use in ultrahigh capacity space data storage and retrieval systems are examined. The crystals for this experiment are included with the various electro-optical components of LDEF experiment. The effects of long-duration exposure on active optical system components is investigated. The concept of data storage in an optical-phase holographic memory is illustrated.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Langley Research Center Long Duration Exposure Facility (LDEF); p 152-153
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Focusing laser scanner (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Economical laser scanner assembled from commercially available components, modulates and scans focused laser beam over area up to 5.1 by 5.1 cm. Scanner gives resolution comparable to that of conventional television. Device is highly applicable to area of analog and digital storage and retrieval.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-25102 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 204
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A coherent light scanner for optical processing of large format transparencies (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A laser scanner is discussed in which the scanning beam is random-access addressable and perpendicular to the image input plane and the irradiance of the scanned beam is controlled so that a constant average irradiance is maintained after passage through the image plane. The scanner's optical system and design are described, and its performance is evaluated. It is noted that with this scanner, data in the form of large-format transparencies can be processed without the expense, space, maintenance, and precautions attendant to the operation of a high-power laser with large-aperture collimating optics. It is shown that the scanned format as well as the diameter of the scanning beam may be increased by simple design modifications and that higher scan rates can be achieved at the expense of resolution by employing acousto-optic deflectors with different relay optics.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Electro-optical Systems Design Conference and International Laser Exposition; Nov 11, 1975 - Nov 13, 1975; Anaheim, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Study of multiple hologram recording in lithium niobate (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The results of detailed experimental and theoretical considerations relating to multiple hologram recording in lithium niobate are reported. The following problem areas are identified and discussed: (1) the angular selectivity of the stored holograms, (2) interference effects due to the crystal surfaces, (3) beam divergence effects, (4) material recording sensitivity, and (5) scattered light from material inhomogeneities.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-120520
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    A laser scanner for 35mm film (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The design, construction, and testing of a laser scanning system is described. The scanner was designed to deliver a scanned beam over a 2.54 cm by 2.54 cm or a 5.08 cm by 5.08 cm format. In order to achieve a scan resolution and rate comparable to that of standard television, an acousto-optic deflector was used for one axis of the scan, and a light deflecting galvanometer for deflection along the other axis. The acoustic optic deflector has the capability of random access scan controlled by a digital computer.
    Keywords: LASERS AND MASERS
    Type: NASA-CR-150810
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Study of multiple hologram recording in lithium niobate (1976)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The results of a number of theoretical and experimental studies relating to multiple hologram recording in lithium niobate are reported. The analysis of holographic gratings stored in lithium niobate has been extended to cover a more realistic range of physical situations. A new successful dynamic (feedback) theory for describing recording, nondestructive reading, erasure, enhancement, and angular sensitivity has been developed. In addition, the possible architectures of mass data storage systems have been studied.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-149986
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
    Electronic Resource
    Electronic Resource
    Pulse stretching of Q-switched lasers (1969)
    Springer
    Optical and quantum electronics 1 (1969), S. 123-127 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Pulse stretching of a passively Q-switched ruby laser is accomplished by the introduction of a non-linear absorber into the laser cavity. Single pulses of length 150 to 400 nsec are observed. The non-linear absorption is obtained by using a Rayleigh-wing scatterer as the solvent for a bleachable dye. This approach is unique in that stretched Q-switched pulses may be obtained by the introduction of a single liquid into the laser resonator with no electronics necessary. Since the Rayleigh Frequency is within the gain lineshape of the active medium, threshold for the stimulated Rayleigh scattering is exceeded at relatively low power densities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419270
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    Paper (German National Licenses)
    Fulltext
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