Accession Number : ADD010842

Title :   Optical Leverage Telecentric Scanning Apparatus.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Balasubramanian,N

Report Date : 16 Aug 1983

Pagination or Media Count : 6

Abstract : An optical leverage telecentric scanning apparatus for scanning a large format film transparency at a given location is disclosed, wherein the scan pattern from the transparency is detected for optical power spectrum analysis. The scanning apparatus includes a collimated laser beam supply and a refraction device for laterally translating the collimated beam, an optical leverage device is provided including a first lens arranged between the laser beam supply device and the refraction device, and a scanning concave parabolic mirror arranged between the diffraction device and the transparency. The degree of magnification afforded by the optical leverage device is equal to the ratio of the focal lengths of the mirror to the first lens, respectively. A detector arranged on the opposite side of the transparency from the refraction device detects the scan pattern produced by the laser beam passing through the transparency. (Author)

Descriptors :   *Patents, *Optical scanning, *Scanners, *Magnification, Transparencies, Films, Collimators, Lenses, Optical analysis, Power spectra, Laser beams, Mirrors, Diffraction, Refraction

Subject Categories : Test Facilities, Equipment and Methods
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE