Stereoscopic motion picture projection system

Details Stereoscopic motion picture projection system Stereoscopic motion picture projection system

1992-07-17

1996-01-02

Hayes, Monroe H.

Optics: motion pictures

Stereoscopic cameras and/or projectors

352 60, 352 62, 352 63, 359465, G03B 3500

Patent

active

054813212

ABSTRACT:
A stereoscopic film projection system including one or more electro-optical light modulators used as part of, or in conjunction with, stereoscopic projection optics for the above-and-below film format employed for 35 mm theatrical cinema. The optical state of each modulator is voltage dependent, and the driving voltage therefor is generated in response to signals from a sensor positioned in the projector aperture. The sensor detects the presence or absence of index marks on the film. This arrangement insures that each subframe is maintained in a proper relationship with the optics' polarizers for preventing the projection of pseudostereoscopic motion pictures.

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