Photocopying – Projection printing and copying cameras – Focus or magnification control
Patent
1983-09-29
1985-09-24
Hix, L. T.
Photocopying
Projection printing and copying cameras
Focus or magnification control
355 1, 355 58, G03B 2732, G02B 516
Patent
active
045429839
ABSTRACT:
The invention discloses an imaging system for a reproduction device for reproducing a document at reduced or enlarged magnification, as well as unity magnification. The system includes at least two linear lens arrays, one lens array providing the 1:1 magnification and the second array adapted to provide a reduced or enlarged image depending upon its vertical orientation. Mechanical arrangements are disclosed which translate a magnification selection into the position of the appropriate lens array into the optical path. This positioning includes both horizontal and rotational movement of the lens arrays. A magnification selection also enables a platen (or document) drive system which selects the proper document scanning speed for that magnification. In a disclosed embodiment the linear lens arrays are gradient index lens arrays.
REFERENCES:
patent: 3544190 (1970-12-01), Moorhusen et al.
patent: 3658407 (1972-04-01), Kitano et al.
patent: 4194827 (1980-03-01), Bleeker et al.
patent: 4331380 (1982-05-01), Rees et al.
patent: 4397409 (1983-08-01), Fantuzzo et al.
Shogren David K.
Zambelli Robert G.
Hix L. T,.
Rutledge Della J.
Xerox Corporation
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