Accession Number : ADD014891

Title :   High Definition Video-Rate Laser-Addressed Liquid-Crystal Light-Valve Projection Display.

Descriptive Note : Patent, Filed 24 May 89, patented 12 Feb 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Trias, John A

Report Date : 12 Feb 1991

Pagination or Media Count : 6

Abstract : A high definition, video-rate laser-addressed liquid-crystal light-valve projection display provides for real-time applications to large-area projection displays. A laser raster scanner uses acousto-optic components to modulate and deflect the laser beam. An acoustic optical, acoustic traveling wave lens is included to increase the optical resolution of the scanner system. A liquid-crystal light-valve spatially is modulated by a high resolution coherent beam to responsibly modulate a high intensity light coming from an arc lamp source. The modulated high intensity light is reflected from the liquid-crystal light-valve and is projected onto a large screen. The use of acousto-optic Bragg cells to modulate, horizontally track, horizontally chirp and vertically impart a beam of coherent light allows a projection of a 1075-line RS-343A high definition or resolution TV standard image on the screen.

Descriptors :   ACOUSTOOPTICS, ARC LAMPS, BEAMS(RADIATION), BRAGG ANGLE, CELLS, COHERENCE, COHERENT OPTICAL RADIATION, HIGH INTENSITY, HIGH RESOLUTION, HORIZONTAL ORIENTATION, LASER BEAMS, LASERS, LIGHT, MODULATION, OPTICAL PROPERTIES, RASTERS, REAL TIME, RESOLUTION, SCANNERS, SOURCES

Subject Categories : Test Facilities, Equipment and Methods
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE