Optical assembly for use in copying machine

Details Optical assembly for use in copying machine Optical assembly for use in copying machine

1979-11-14

1981-10-20

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 8, 355 66, G03B 2734, G03B 2740, G03B 2770

Patent

active

042957362

ABSTRACT:
For end positions of the elements of an minute adjustment of the optical system set for magnifications having the same conjugate distance, the focal adjustment for one of two magnification modes is first performed by adjusting the position of a mirror assembly, and the adjustment for the other magnification mode is performed only by adjusting the end position of the lens assembly at the position for the other magnification mode. Hence, during the change of the magnification modes from one to the other the position of the mirror assembly per se remains unchanged.

REFERENCES:
patent: 3431053 (1969-03-01), Wick et al.
patent: 3572924 (1971-03-01), Matsumoto et al.
patent: 3600066 (1971-08-01), Del Vecchio
patent: 3884574 (1975-05-01), Doi et al.
patent: 4080062 (1978-03-01), Torigai et al.
patent: 4154524 (1979-05-01), Hattori et al.
patent: 4192609 (1980-03-01), Tani et al.

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