Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1975-09-10
1977-08-23
Adams, Russell E.
Photocopying
Projection printing and copying cameras
Illumination systems or details
355 67, 355 69, 355 70, 355 75, 240 13, 240 2C, 240 2AT, G03B 2776
Patent
active
040436624
ABSTRACT:
A photographic light source has a boxlike frame with sockets for mounting and electrically connecting, for continuous operation, fluorescent white light tubes of conventional type distributed about the inner sides of the frame and extending longitudinally of them. Reflectors with light diffusing reflecting surfaces are mounted to extend between the sockets and about light tubes mounted therein, the reflectors having a position in which most of the light from the tubes is directed and reflected into the frame and mainly toward one face of it. The mixture of direct and reflected light reflected by a subject within the frame, or outside that face of it, toward a camera directed into the opposite face of the frame, provides effective lighting for color or black and white pictures, with the predominant green of directly reflected light from such tubes desirably suppressed. Adapters are provided for using the frame for slide viewing and photographing.
REFERENCES:
patent: 1600709 (1926-09-01), Bhosys
patent: 2351031 (1944-06-01), Froelich
patent: 2433133 (1947-12-01), Lindsey
patent: 3586849 (1971-06-01), Starkweather et al.
patent: 3609039 (1971-09-01), Ambraschka
patent: 3669538 (1972-06-01), Fowler
patent: 3777135 (1973-12-01), Rees
Photographic Applications in Science, Technology & Medicine, article & advertisement "Aristo DA-10", July, 1973.
IEEE Standard Dictionary of Electrical and Electronic Terms, p. 285.
Adams Russell E.
Kent Edgar H.
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