Optical apparatus and reproducing machine

Details Optical apparatus and reproducing machine Optical apparatus and reproducing machine

1975-06-20

1977-03-22

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

354189, 355 8, 355 51, 355 52, 355 66, G03B 2770

Patent

active

040133613

ABSTRACT:
An apparatus for viewing an original and for projecting an image thereof onto a moving imaging surface and a reproducing machine employing the apparatus. The apparatus includes a lens arranged along an optical path. The projected image magnification may be changed by translating the lens in a plane of motion between first and second positions. Apparatus are provided for tilting the lens with respect to the plan of motion to a different extent at the first position than at the second position to thereby reduce the occurrence of vignetting in the optical system.

REFERENCES:
patent: 2293598 (1942-08-01), Drucker
patent: 3479945 (1969-11-01), Koch
patent: 3703334 (1972-11-01), Knechtel
patent: 3711199 (1973-01-01), Koizumi
patent: 3740137 (1973-06-01), Sato
patent: 3778153 (1973-12-01), Iki
patent: 3829209 (1974-08-01), Buddendeck et al.
IBM Technical Disclosure Bulletin, vol. 14, No. 6, Nov. 1971, pp. 1766 & 1767.

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