Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1987-06-22
1989-04-04
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250227, 358208, H01J 314
Patent
active
048188611
ABSTRACT:
In a film image reading out device, in which one surface of a film, where images are recorded, is scanned repeatedly with a laser light beam along a scanning line and images are read out by detecting continuously light, which has passed through the film, while moving the film with a low speed in the direction, which is perpendicular to the scanning line, a light diffusing member is disposed closely to the surface opposite to that of the film scanned with the laser light beam and the optical density of the film is detected continuously by leading transmitted and diffused light to a photodetector by means of a bundle of optical fibers.
REFERENCES:
patent: 4010364 (1977-03-01), Fuwa
patent: 4591714 (1986-05-01), Goto et al.
patent: 4710624 (1987-12-01), Alvarez et al.
Horiuchi Hideyuki
Onodera Yoichi
Shimbo Chiaki
Suzuki Ryuichi
Hitachi Medical Corp.
Shami Khaled
Westin Edward P.
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