Apparatus and method for copying photographic masters at variabl

Details Apparatus and method for copying photographic masters at variabl Apparatus and method for copying photographic masters at variabl

1991-09-13

1992-09-29

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

355 77, G03B 1328

Patent

active

051517337

ABSTRACT:
Light is passed through a negative located in a primary optical path and towards a band of copy material disposed in the path. A reflector is movable into the primary path so as to deflect the light into a secondary optical path. A mat, transparent plate is situated in the secondary path. The plate is situated in a plane which is a conjugate of the plane of the copy material with reference to the reflector when the latter is in the primary path. A sharp image of the negative is formed on the plate. Light passing through the plate is deflected into a tertiary optical path by a second reflector. The light entering the tertiary path is sensed by a video camera which then causes the image on the plate to be reproduced on a monitor for evaluation prior to copying.

REFERENCES:
patent: 2968215 (1961-01-01), Goodman
patent: 3459888 (1969-08-01), Sokolov
patent: 4603966 (1986-08-01), Brownstein
patent: 4627719 (1986-12-01), Nitsch

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