Stereoscopic films and viewers therefor

Details Stereoscopic films and viewers therefor Stereoscopic films and viewers therefor

1977-01-21

1978-12-05

Meister, J. M.

Optics: image projectors

Picture carrier

83 40, 83 41, 83405, 352241, B26D 1100

Patent

active

041283201

ABSTRACT:
A method of producing stereoscopic film from standard 35 mm film is described in which the standard 35 mm is longitudinally cut in half. Selected sprocket holes in each half are enlarged to provide a series of locating holes at regular intervals along the film. Each locating hole enables a corresponding pair of stereoscopic film frames on the film to be located in a viewing position. Also described is a viewer for viewing the stereoscopic films. The viewer incorporates a locating finger which engages each locating hole in turn to locate and hold the film steady while viewing. The viewer includes a reciprocating drive means for driving the film. The locating finger is withdrawn from a locating hole when the drive means performs its forward stroke and the forward stroke is limited when the finger engages the next hole. The finger remains engaged with the next locating hole during the return stroke of the drive means thereby preventing any inadvertant movement of the film during the return stroke.

REFERENCES:
patent: 3639045 (1972-02-01), Haefeli

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