Two-dimensional acousto-optic deflection arrangement

Details Two-dimensional acousto-optic deflection arrangement Two-dimensional acousto-optic deflection arrangement

1983-11-23

1985-12-31

Punter, William H.

G02F 113

Patent

active

045617279

ABSTRACT:
A two-dimensional acousto-optic deflection arrangement including a source (10a) of electromagnetic radiation, means (18) for modulating the source, means for collimating the output of the source into a beam, and an acousto-optic deflection means (12a) situated in the path of said beam, the deflection means comprising a rectangular body of acousto-optic material provided on two adjacent surfaces with electro-acoustic transducers arranged to launch orthogonal bulk acoustic waves into the material transverse the direction of propagation of radiation through the material whereby the focussed radiation can be scanned in two dimensions over an area illuminated by a source (20) secondary illumination. Typically the scanned area comprises a thermo-optically addressable liquid crystal display device (17).

REFERENCES:
patent: 3958863 (1976-05-01), Isaacs et al.
patent: 4031529 (1977-06-01), Borel et al.
patent: 4040047 (1977-08-01), Hareng et al.
Dewey et al., "The Application of GaAlAs Lasers to High-Resolution Liquid-Crystal Projection Displays", IBM J. Res. & Develop., vol. 26, 3-1982, pp. 177-185.
Maydan, D., "Infrared Laser Addressing of Media for Recording and Displaying of High-Resolution Graphic Information", Proc. IEEE, 7-1973, pp. 1007-1013.
Anderson, L. K., "Projecting Images with Liquid Crystals", Bell Lab. Record, 7,8-74, pp. 223-229.

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