Transparency projector comprising a plurality of optical systems

Details Transparency projector comprising a plurality of optical systems Transparency projector comprising a plurality of optical systems

1978-02-01

1979-10-02

Stephan, Steven L.

Optics: image projectors

Shutter

Plural projection paths

353 94, 353103, 353116, G03B 2114, G03B 2304

Patent

active

041696689

ABSTRACT:
The present invention relates to a projector comprising two optical systems enabling transparencies to be projected with cross-fading, in 3-D and with double-width panning, said projector operating with a single transparency distributing and recuperating magazine, in which the transparencies are arranged in the same order as if they were to pass in a single-lens projector; said projector comprises four parallel transparency guide slots, which are parallel to one another and transverse with respect to the axes of two optical systems in which the transparencies circulate in pairs, said guide slots being extended by a switching means whose role is to cause the transparencies which have already been projected to pass from the forward guide slots into the return guide slots, and thus to cause the transparencies to return to the same compartment of the same magazine from which they left. These displacements are possible due to a recuperator having multiple functions. Simultaneously to the displacement of the recuperator, a double potentiometer in relation with an electronic device effects cross-fading. This projector may be used for simple projection, but without a gap between two transparencies, for 3-D and for double-width panning.

REFERENCES:
patent: 3847472 (1974-11-01), Sobotta
patent: 3910696 (1975-10-01), Mulch

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