Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1991-03-27
1992-01-21
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Illumination systems or details
355 38, 355 71, 355 77, G03B 2774, G03B 2780
Patent
active
050831542
ABSTRACT:
A copying apparatus provided with a light-attenuating filter used for controlling copying conditions. The light-attenuating filter is formed of a nontransparent member in which a multiplicity of small holes or small-width slits are provided. In setting the printing conditions for the copying apparatus, a film development-evaluating film with an evaluating latent image recorded thereon is developed, the image on the evaluating film developed is photometrically measured and printed on a paper, the printed paper is developed, and the density of a print obtained by development is measured so as to set the printing conditions. To photometrically measure the print, a punched hole provided in the paper is detected to photometrically measure a central portion of the image plane.
REFERENCES:
patent: 3165970 (1965-01-01), Pelletier
patent: 3685900 (1972-08-01), Kirby et al.
patent: 3754824 (1973-08-01), Weisglass et al.
patent: 3901598 (1975-08-01), Vanheerentals
patent: 4526462 (1985-07-01), Hope et al.
patent: 4657378 (1987-04-01), Hope et al.
Sato Fumiaki
Terashita Takaaki
Fuji Photo Film Co. , Ltd.
Wintercorn Richard A.
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