Dual lens image rotation system

Details Dual lens image rotation system Dual lens image rotation system

1983-09-06

1985-01-22

Haroian, Harry N.

Optics: image projectors

Lens support

Lens position adjustable

G03B 2122

Patent

active

044948409

ABSTRACT:
A device for rotating the projected image in a dual lens microfilm reader. Each lens has an image rotation prism positioned above it with selector means for positioning either of the projection lenses and its prism in the image projection path. Gears surround each prism and are driven simultaneously an identical amount by means of a drive gear engaging both of the surrounding prism gears. The projected image is rotated an identical amount regardless of which projection lens is disposed in the image light path.

REFERENCES:
patent: 2548554 (1951-04-01), Nivison et al.
patent: 2569918 (1951-10-01), Berggren
patent: 2865274 (1958-12-01), Richartz
patent: 3354776 (1967-11-01), Smitzer et al.
patent: 4111149 (1978-09-01), Wells
patent: 4172657 (1979-10-01), Watanabe et al.
Publication: Micron Corp., Series 700, Microfiche Reader.

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