Motion picture printing apparatus

Details Motion picture printing apparatus Motion picture printing apparatus

1975-02-18

1978-02-28

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 83, 355 88, G03B 2778

Patent

active

040764141

ABSTRACT:
A high speed, photographic optical printer, for making duplicates of a master motion picture film, wherein the overall exposure and the color balance of the copy film can be automatically controlled and are continuously adjustable over a wide dynamic range by means of electro-optical modulators, such as PLZT ceramic devices, in the light path between the light source and the copy film, and an electric circuit connected to each electro-optical modulator for controlling their transmissivity. In another embodiment, overall exposure is controlled by controlling the electrical energy applied to a pulsed xenon source that is turned on once for each frame.

REFERENCES:
patent: 2691917 (1954-10-01), Curry
patent: 3085469 (1963-04-01), Carlson
patent: 3120782 (1964-02-01), Goddard et al.
patent: 3519347 (1970-07-01), Bowker et al.
patent: 3663110 (1972-05-01), Rising
patent: 3761172 (1973-09-01), Letzer
patent: 3813158 (1974-05-01), Zahn et al.

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