Adjustable optical cam

Details Adjustable optical cam Adjustable optical cam

1977-02-18

1978-03-07

Griffin, Donald

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 58, G03B 2738, G03B 2770

Patent

active

040777154

ABSTRACT:
An automatically focusing optical system for copiers, duplicators and other reproduction equipment having a variable magnification capability. The auto-focusing mechanism comprises a camming means for moving a mirror or other component of the optical system to maintain focus throughout the magnification range of the system. The camming means is additionally designed to be adjustable in such a way that it can accommodate imaging lens systems which differ in focal length within the normal manufacturing tolerance band, and thus replace the family of cams utilized in the prior art to accommodate lenses of different focal length.

REFERENCES:
patent: 2137028 (1938-11-01), Rau
patent: 3733128 (1973-05-01), Naumann et al.

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