Optical system featuring change in magnification by combined le

Details Optical system featuring change in magnification by combined le Optical system featuring change in magnification by combined le

1975-08-29

1978-09-26

Hix, L. T.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 3R, 355 57, G03B 2770, G03G 1526

Patent

active

041165624

ABSTRACT:
The optical system disclosed is incorporated in a copying machine and has provision for changing magnification of original documents of diverse sizes while maintaining a common image plane projection and enabling the use of common reference edges at a selected reference corner for any original document that might be used and also maintains common reference edges in the image plane. The system contemplates the combined movement of the lens element as well as one of a pair of mirrors to insure that the original document surface and the image plane remain in their fixed positions, regardless of the magnification factor chosen. The lens element is movable forwardly and reversely along the optical path as well as transversely with respect thereto.

REFERENCES:
patent: 2772599 (1956-12-01), Broms
patent: 3388644 (1968-06-01), Granzow et al.
patent: 3395610 (1968-08-01), Evans et al.
patent: 3437410 (1969-04-01), Tregay et al.
patent: 3486819 (1969-12-01), Giulio
patent: 3542467 (1970-11-01), Ferguson
patent: 3556655 (1971-01-01), Lux et al.
patent: 3572924 (1971-03-01), Matsumoto
patent: 3614222 (1971-10-01), Post et al.
patent: 3685894 (1972-08-01), Lux et al.
patent: 3703334 (1972-11-01), Knechtel et al.
patent: 3709603 (1973-01-01), Furiuchi
patent: 3711199 (1973-01-01), Korzumi
patent: 3792926 (1974-02-01), Knechtel

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