Accession Number : ADD005264

Title :   Acousto-Optic Image Scanner.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Das,Pankaj K

Report Date : 06 Jun 1978

Pagination or Media Count : 4

Abstract : An acousto-optic image scanner employing pulses of acoustic surface waves which propagate along the length of a piezoelectric crystal performing as a traveling phase grating to diffract a collimated monochromatic light beam which has a spatial light distribution corresponding to the information content of a line of the image. The light beam propagates through the width of the crystal thus providing an extensive electro-optic interaction length for increased diffraction efficiency. The light intensity at a first-order spot is detected to provide a temporal signal representative of the light distribution of an image line. Scanning of colored images can be accomplished by utilizing a chromatic beam and detecting the light at the first-order spots corresponding to the three different wavelengths present in the illuminating beam. (Author)

Descriptors :   *Patents, *Acoustooptics, *Images, *Scanning, Acoustic waves, Surface waves, Piezoelectric crystals, Monochromatic light, Light transmission, Illumination

Subject Categories : Test Facilities, Equipment and Methods
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE