Illuminating system for photographic color enlargement or copyin

Details Illuminating system for photographic color enlargement or copyin Illuminating system for photographic color enlargement or copyin

1978-08-17

1980-02-19

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 88, G03B 2776

Patent

active

041892275

ABSTRACT:
An illuminating system is provided with a source of light for generating a beam of light having a ratio of energy distribution at three wave length ranges that differ from the spectral sensitivity of photographic copying material at those three wave length ranges. Color filters are inserted into the beam of light to a depth for compensating for the disparity between the energy distribution and spectral sensitivity. One of the filters is of a filter color that influences the wave length ranges having the highest energy levels in excess of a desired energy; a second filter of a second filter color influences only the wave length range with the largest energy excess over the desired energy level.

REFERENCES:
patent: 3784377 (1974-01-01), Levy et al.
patent: 3797933 (1974-03-01), Sable
patent: 3836246 (1974-09-01), Bowker
patent: 3982825 (1976-09-01), Mitchell
patent: 4050807 (1977-09-01), Barbieri
patent: 4087174 (1978-05-01), Nishikawa
patent: 4101216 (1978-07-01), Grossmann

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