Methods and apparatus for automatic exposure control

Details Methods and apparatus for automatic exposure control Methods and apparatus for automatic exposure control

1976-04-26

1978-06-06

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 71, 355 77, 250559, 356202, G03B 2776, G03B 2778

Patent

active

040933750

ABSTRACT:
This invention relates to a method of exposure control in photographic printing apparatus for printing from originals made on different types of photographic material, the method comprising:

REFERENCES:
patent: 3074312 (1963-01-01), Olson
patent: 3379110 (1968-04-01), Blackert et al.
patent: 3455632 (1969-07-01), Neale et al.
patent: 3888580 (1975-06-01), Amano et al.
patent: 4018526 (1977-04-01), Schroter

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