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:

1991-02-12

Pagination or Media Count:

6.0

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