Color compensation method in photographic printer

Details Color compensation method in photographic printer Color compensation method in photographic printer

1985-04-16

1986-09-09

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 77, G03B 2772

Patent

active

046105387

ABSTRACT:
It is necessary to optimally control exposure conditions in printers and development conditions for negative films and photographic paper in order to achieve color printing of high quality. According to the method of this invention, as the luminance voltage of a light source and color compensation filters for respective colors are controlled automatically and the voltage to be applied to the light source can be minimized to avoid a waste of light. Even if there is insufficient light at the light source due to the deterioration of the light source or the fluctuations in a power source voltage, this method enables one increase the amount of light by increasing the voltage to be applied to the light source.

REFERENCES:
patent: 3184307 (1965-05-01), Letzer
patent: 3702732 (1972-11-01), Sliwkowski
patent: 3984185 (1976-10-01), Vinatzer
patent: 4050807 (1977-09-01), Barbieri

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