Imaging system for producing reduced or enlarged images of an or

Details Imaging system for producing reduced or enlarged images of an or Imaging system for producing reduced or enlarged images of an or

1983-03-21

1985-08-27

Hix, L. T.

Photocopying

Projection printing and copying cameras

Focus or magnification control

G03B 2736

Patent

active

045374996

ABSTRACT:
A flash exposure optical imaging system is provided which includes a light housing having a movable top and bottom surface. The top surface contains a document platen, the bottom surface a fixed, wide-angle projection lens. These surfaces are vertically translated past a fixed, central housing wall to vary the system conjugate in response to changes in magnification. In a preferred embodiment, a pair of football shaped cams are rotated in response to position signals from a controller initiated by a magnification change. A pair of T-bars and linkage mechanisms are associated with these cams and their motion provides simultaneous vertical motions to the top and bottom housing surfaces, respectively.

REFERENCES:
patent: 2786384 (1957-03-01), Guppy
patent: 4116554 (1978-09-01), Libby et al.
patent: 4265990 (1981-05-01), Stolka et al.
patent: 4272188 (1981-06-01), Lehman et al.
patent: 4298275 (1981-11-01), Critchlow et al.
patent: 4316668 (1982-02-01), Miller
patent: 4351606 (1982-09-01), Franko
patent: 4466734 (1984-08-01), Rees
Ser. No. 372581, Rees 4/28/82.

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