Optical structure for microfiche reader

Details Optical structure for microfiche reader Optical structure for microfiche reader

1975-10-14

1978-09-05

Haroian, Harry N.

Optics: image projectors

Lens support

Lens position adjustable

353 87, 353 78, G03B 300

Patent

active

041115376

ABSTRACT:
A microfiche reader providing varying optical paths of projection of a microfiche image. The light source for the reader may be removed and readily replaced without the operator's 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. The focusing system is self-compensating for mechanical tolerances. 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: 3413061 (1968-11-01), Simpson et al.
patent: 3601482 (1971-08-01), Harvey
patent: 3634005 (1972-01-01), Peters et al.
patent: 3791727 (1974-02-01), Kleekanp
patent: 3809460 (1974-05-01), Lettan et al.
patent: 3834800 (1974-09-01), Brownscombe
patent: 3888576 (1975-06-01), Bolgar et al.

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