Accession Number : AD0905072

Title :   Ultraviolet Laser Recording Techniques for Side Looking Radar Applications.

Descriptive Note : Final rept. 15 Oct 71-15 Aug 72,

Corporate Author : RESALAB INC DALLAS TEX LIGHT ELECTRONICS DIV

Personal Author(s) : Morganstern,Arthur L. ; Limburg,William R. ; Kelly,W. T.

Report Date : AUG 1972

Pagination or Media Count : 169

Abstract : This report describes the analytical and experimental work done to investigate the advantages, design tradeoffs, and potential problems associated with the use of ultraviolet and near-ultraviolet lasers in very high resolution and very wide bandwidth precision raster type laser beam recorders (LBR's) for side-looking radar and other reconnaissance sensor applications. Recommended designs are presented for each of the major subsystems of the recorder, including the traveling-wave light modulator design, and a new type of high speed mirror scanner employing thermoelectrically pumped Freon as a lubricant in a completely closed system. The recommended (most promising) laser for this application is the ruggedized Helium-Cadmium gas laser. Recommended photographic films are also presented and discussed. Two conceptual designs for precision wide-bandwidth LBR's are described, one using a flat-field approach and one employing a curved field configuration. A comprehensive set of test procedures suitable for evaluating the performance of this class of precision recorder is also presented. The test procedures cover measurement of spot velocity uniformity, raster line spacing uniformity, line straightness and skew, system modulation transfer function (MTF), and other important performance factors. (Author)

Descriptors :   (*LASERS, ULTRAVIOLET RADIATION), (*SIDE LOOKING RADAR, LASERS), (*RECORDING SYSTEMS, LASERS), GAS LASERS, MIRRORS, BROADBAND, TRANSFER FUNCTIONS, RESOLUTION, MODULATORS, MAPPING, REAL TIME, AERIAL RECONNAISSANCE, PHOTOGRAPHIC RECORDING SYSTEMS, ELECTROOPTICS, HELIUM, CADMIUM, CRYSTALS, OPTICS, SYNTHETIC APERTURE RADAR, IMAGE MOTION COMPENSATION, GROUND SPEED

Subject Categories : Lasers and Masers
      Recording and Playback Devices
      Military Intelligence
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE