Optical structure for microfiche reader

Details Optical structure for microfiche reader Optical structure for microfiche reader

1976-08-23

1978-09-05

Haroian, Harry N.

Optics: image projectors

Cabinet encloses projector and one side of screen

Reflector between lamp and screen

353101, 353119, 353 87, G03B 2122

Patent

active

041111494

ABSTRACT:
A microfiche reader providing varying optical paths of projection of a microfiche image. Variable hood means provide self-contained viewing, or projection of the image on a screen, wall or ceiling. The light source for the reader may be removed and readily replaced without the operator touching the sensitive lamp. Dual image forming floating lenses having a universal focusing system provide multiple magnification capabilities with uniform focusing in all positions of the microfiche. Additional means prevent chipping of the glass plates holding the microfiche when the floating lenses are removed from contact with the glass plates.

REFERENCES:
patent: 1153685 (1915-09-01), Fuerzoni
patent: 1862577 (1932-06-01), Matthews
patent: 2170967 (1939-08-01), Eppenstein et al.
patent: 2177638 (1939-10-01), Draeger
patent: 2482666 (1949-09-01), Gradisar
patent: 3733121 (1973-05-01), Smitzer
patent: 3781102 (1973-12-01), Chandler
patent: 3848982 (1974-11-01), Shoji

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