Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1989-05-24
1991-02-12
Groody, James J.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358235, H04N 574
Patent
active
049928805
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.
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patent: 4533215 (1985-08-01), Trias et al.
patent: 4611245 (1986-09-01), Trias
patent: 4623219 (1986-11-01), Trias
patent: 4851918 (1989-07-01), Crowley
Grinberg et al "Photoactivated Birefringent Liquid-Crystal Light Valve for olor Symbology Display", published in IEEE Transactions on Electron Devices, Sep. 1975, pp. 775-783.
Bademian "Acousto-Optic Modulation and Deflection", published in the Optical Industry and Systems Purchasing Directory, 1980, pp. B-823-B-826.
Johnson et al. "Optical Beam Deflection Using Acoustic-Traveling-Wave Technology", published in SPIE vol. 90, Acousto-Optics (1976) pp. 40-48.
Merry et al. "Acousto-Optic Laser Scanning", published in SPIR vol. 169 Printing (1979) pp. 56-59.
Bademian "Acousto-Optic Laser Recording", published in Optical Engineering Jan./Feb. 1981, vol. 20, No. 1, pp. 143-149.
Fendelman Harvey
Groody James J.
Keough Thomas Glenn
Powell Mark R.
The United States of America as represented by the Secretary of
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