Light valve system for motion picture film printer

Details Light valve system for motion picture film printer Light valve system for motion picture film printer

1976-12-30

1978-08-22

Corbin, John K.

Photocopying

Contact printing

Light boxes

350174, 355 88, G02F 103, G03B 2728

Patent

active

041085370

ABSTRACT:
An electro-optic light valve is disclosed which is particularly adapted to be used in an additive color printing system for use on conventional photographic film printers. The additive color system utilizes a plurality of light valves, one for each of the monochromatic light beams, for controlling the color balance and light beam intensity of the printing light beam on the photographic film printer. A programmable, electronic control system is provided for driving the light valves in accordance with programmed color balance and intensity information. Closed loop feedback is provided from the electro-optic light valves to the control system to guarantee accurate execution of the programmed information.

REFERENCES:
patent: 3708797 (1973-01-01), Solomon et al.
patent: 3752577 (1973-08-01), Grossetete et al.

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