Multiple lens image rotation system

Details Multiple lens image rotation system Multiple lens image rotation system

1988-05-16

1989-09-26

Haroian, Harry N.

Optics: image projectors

Lens support

Lens position adjustable

353 81, G03B 2122

Patent

active

048704350

ABSTRACT:
A multiple lens image rotation system includes an elongated base fixedly mounted to a microfilm reader apparatus having a plurality of projection lenses with different magnification levels on a carrier movably mounted with respect to the base. The carrier is adapted to move along an axis generally parallel to the longitudinal axis of the base defining a first position wherein one projection lens is aligned with an image projection path and a second position and subsequent positions wherein other projection lenses are aligned with the image projection path. A single image rotation prism is rotatably mounted in the image projection path for use with the plurality of projection lenses one at a time. The image rotation prism is adapted to rotate about an axis generally coaxial with the image projection path.

REFERENCES:
patent: 2548554 (1951-04-01), Nivison et al.
patent: 2937569 (1960-05-01), Wilton
patent: 3981574 (1976-09-01), Jesensky
patent: 4163611 (1979-08-01), Hall
patent: 4494840 (1985-01-01), Toeppen
patent: 4710004 (1987-12-01), Verhaagen

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