Exposure control device for color printer

Details Exposure control device for color printer Exposure control device for color printer

1979-06-08

1981-04-28

Hix, L. T.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 68, 355 71, G03B 2773

Patent

active

042641950

ABSTRACT:
In a color printer provided with an optical path into which a negative is brought and an image of the negative is focused on a photographic paper to make a color print, an exposure control device is provided. The exposure control device has a plurality of neutral density filters which can be put into the optical path of the color printer independently of or in combination with each other. The combination of the plurality of neutral density filters is selected to stepwisely change the total density of the combined neutral density filters according to the density of the negative brought into the optical path of the color printer. The plurality of neutral density filters are gray filters and have different densities.

REFERENCES:
patent: 3130634 (1964-04-01), Kropp et al.
patent: 3205767 (1965-09-01), Weber et al.
patent: 4056319 (1977-11-01), Mischo

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