Photometric system for a photographic printing apparatus

Details Photometric system for a photographic printing apparatus Photometric system for a photographic printing apparatus

1996-07-31

1998-03-24

Moses, R. L.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 38, 355 41, 355 68, 356213, 356218, G03B 2772, G01J 100, G01J 142

Patent

active

057318654

ABSTRACT:
A photometric system for a photographic printing apparatus having an exposure device for projecting light traveling from a light source (21) through a mirror tunnel (24), along a projection path through a photographic film (2) to printing paper (3). An opening (24b) is formed in a side wall (24d) having a mirror surface for forming the mirror tunnel. The photometric system includes a photometer (60) disposed outside the mirror tunnel for metering only light entering through the opening (24b) from a region of the opening (24b) and a region displaced from the region of the opening (24b) toward the light source, and a reflection mirror (31; 71) for deflecting the light entering through the opening (24b) toward the photometer (60). The reflection mirror (71) is switchable between a first position for deflecting the light entering through the opening (24b) toward the photometer (60), and a second position for covering the opening (24b).

REFERENCES:
patent: 4585348 (1986-04-01), Chastang et al.
patent: 4666306 (1987-05-01), Matsumoto
patent: 5006886 (1991-04-01), Suzuki
patent: 5019858 (1991-05-01), Suzuki
patent: 5041868 (1991-08-01), Suzuki
patent: 5053807 (1991-10-01), Uryu
patent: 5101227 (1992-03-01), Ikenoue et al.
Konishiroku Shashin Kogyo, JP-A-57 207237, Patent Abstracts of Japan, vol. 7, No. 60 (p-182), 12 Mar. 1983.

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