Preview and projection system for slides stored in spaced, co-pl

Details Preview and projection system for slides stored in spaced, co-pl Preview and projection system for slides stored in spaced, co-pl

1976-06-29

1979-01-09

Stephan, Steven L.

Optics: image projectors

Editing or auxiliary viewing

353 27R, 353108, 353120, 353DIG3, 353DIG5, G03B 21132, G03B 2128, G03B 2308

Patent

active

041336054

ABSTRACT:
A system for previewing and projecting slides that are stored in spaced, co-planar relation in a planar holder is disclosed. The slides are previewed, either individually or in a group, in their natural orientation without removing the slides from the holder. Projection of the slides to form a naturally oriented image also is accomplished without removing the slides from the holder. In the preferred embodiment, means are provided for moving the planar slide holder orthogonally with respect to the optical axis of the projection system. A slide indexing system is provided to allow the projectionist to select a particular slide for projection. The slide indexing system utilizes cooperative means on the slide holder and projector to achieve indexing and, if desired, other control functions. In an alternative embodiment, the projected image plane is vertical and can be rotated about a vertical axis at the projector without moving the base of the projector.

REFERENCES:
patent: 2250174 (1941-07-01), Bancroft
patent: 2534561 (1950-12-01), Silver
patent: 2811892 (1957-11-01), Holloway
patent: 3457007 (1969-07-01), Conroy
patent: 3466126 (1969-09-01), Sakamoto
patent: 3759487 (1973-09-01), Badalich
patent: 3807850 (1974-04-01), Ozeki
patent: 3871759 (1975-03-01), Crew

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