Unit for reproducing transparent originals, or the like

Details Unit for reproducing transparent originals, or the like Unit for reproducing transparent originals, or the like

1978-06-29

1980-03-25

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 32, G03B 2754

Patent

active

041948343

ABSTRACT:
A compact optical bench type unit for making selected color-component records of color transparencies for use in color printing comprises a light source with a rotary filter disc for directing a beam of selectively colored light through a light condenser which converges the beam through a color diapositive to be reproduced and into the objective of a camera. The condenser, possibly formed of Fresnel lenses, is of large dimensions to accomodate large diapositives, and the camera objective has a relatively short focal length. Chromatic aberration of the condenser is corrected by moving the light source in correspondence with rotation of the filter disc, or by selectively inserting correcting lenses in the beam.

REFERENCES:
patent: 3510220 (1970-05-01), Bures
patent: 3639054 (1972-02-01), Wally, Jr.
patent: 3829210 (1974-08-01), Langer et al.
patent: 3854815 (1974-12-01), McIntosh
patent: 3874792 (1975-04-01), Turner
patent: 3984849 (1976-10-01), Guillaume

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