Stereoscopic projector and method for driving projecting lenses

Details Stereoscopic projector and method for driving projecting lenses Stereoscopic projector and method for driving projecting lenses

1991-01-30

1992-06-30

Shoap, Allan N.

Optics: image projectors

Stereoscopic

359462, 359473, 359477, 352 60, 352 57, G03B 3500

Patent

active

051257335

ABSTRACT:
A method and an apparatus for driving projecting lenses in a stereoscopic projector wherein a pair of projecting lenses are integrally driven so as to match (coincide) two images on a screen and simultaneously focus the images on the screen for producing a stereoscopic image, the apparatus comprising a driving device for moving the projecting lens holders forwardly and backwardly with respect to the screen, and inwardly and outwardly with respect to the optical axis of the screen, with maintaining the projecting lens holders in parallel to the optical axis of the screen so that images-matching and focusing on the screen can be accomplished, thereby avoiding any generation of keystoning phenomenon.

REFERENCES:
patent: 2580874 (1952-01-01), Wottring
patent: 2595409 (1952-05-01), Reijnders
patent: 2598573 (1952-05-01), Lutes
patent: 2968217 (1961-01-01), Ewald
patent: 3418044 (1968-12-01), Sheldon
patent: 4429328 (1984-01-01), Jones, Jr. et al.
patent: 4915497 (1990-04-01), Loth et al.
patent: 4997270 (1991-03-01), Shaw
patent: 5001555 (1991-03-01), Park

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