Photographic printing apparatus

Details Photographic printing apparatus Photographic printing apparatus

1985-08-09

1986-11-18

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Multicolor picture

354431, 355 68, G03B 2780

Patent

active

046232460

ABSTRACT:
A photographic printing apparatus for printing an image formed on a negative film on photographic paper includes a shutter disposed between the photographic paper and an enlarging lens. A reflective surface is provided on the surface of the shutter on the side thereof which is closer to the enlarging lens. A light receiver is disposed outside the optical path of exposure light in such a manner as to face the reflective surface. When the shutter is closed, the light receiver receives the light which forms an out-of-focus image at the reflective surface and is reflected therefrom. Accordingly, it is possible to measure an averaged density of the film image.

REFERENCES:
patent: 3263556 (1966-08-01), Mey
patent: 3649118 (1972-03-01), Yano et al.
patent: 3791276 (1974-02-01), Ueda et al.

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