Variable conjugate optical system

Details Variable conjugate optical system Variable conjugate optical system

1974-11-11

1976-03-30

Aegerter, Richard E.

Optics: image projectors

Cabinet encloses projector and one side of screen

Focus or variable magnification

353 99, 353101, 355 57, G03B 2128, G03B 2734

Patent

active

039471888

ABSTRACT:
An optical system for projecting an image of an object, operating between fixed object and image planes. Both the object conjugate and the image conjugate are variable to vary the magnification in the system. This is accomplished without moving the optical axis by means of a first roof mirror on the object side of the lens and a second roof mirror on the image side of the lens. These mirrors each fold the optical axis by 90.degree. and are movable along a locus at 45.degree. to the optical axis to change the object and image distances.

REFERENCES:
patent: 3489494 (1970-01-01), Snider
patent: 3604795 (1971-09-01), Crandall
patent: 3792926 (1974-02-01), Knechtel

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