Photographic printer

Details Photographic printer Photographic printer

1987-06-12

1988-08-16

Hix, L. T.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 68, 355 77, G03B 2772, G03B 2780

Patent

active

047647930

ABSTRACT:
A photographic printer includes integral densitometry apparatus for performing scanned transmissive, large area transmissive, and reflective density measurements using a single light sensor. The densitometry apparatus includes a rotatable filter wheel supporting both scanning and large area transmissive filters used in making all of the density measurements. The scanning and large area density measuring apparatus use the same light projector as and share common optical hardware with that used to print pictorial negatives. The reflection densitometry apparatus includes a detachable holder for supporting reflective patches, and a second light source activated responsive to the introduction of the holder into the printer for illuminating the reflective patch.

REFERENCES:
patent: 3051069 (1962-08-01), Neale
patent: 3083614 (1963-04-01), Veit
patent: 3237513 (1966-03-01), Dreyfoos
patent: 3462221 (1969-08-01), Tajima et al.
patent: 4161363 (1979-07-01), Kahle
patent: 4278347 (1981-07-01), Okamoto et al.
patent: 4313671 (1982-02-01), Kuru
patent: 4526462 (1985-07-01), Hope et al.
patent: 4540276 (1985-09-01), Ost
patent: 4572657 (1986-02-01), Amano et al.
patent: 4623246 (1986-11-01), Kubota et al.
Copending Application No. 900,551, filed Aug. 8, 1986.

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