Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1987-06-18
1989-05-02
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250227, H01J 314
Patent
active
048271268
ABSTRACT:
A light guide of an elongate shape having rectangular cross section, e.g., a quandrangular prism, directs, toward a light detector, either light emitted by applying a scanning light beam to an object and indicative of image information or a synchronizing light beam divided from the scanning light beam. The light guide has at least one outwardly spread end at which the light detector is disposed. The emitted light or the synchronizing light beam which has entered the light guide is totally reflected in the light guide by an inclined surface thereof progressively inclined in a direction toward the spread end, so as to be directed toward the light detector.
REFERENCES:
patent: 4602154 (1986-07-01), Taniguchi
D. H. Cronquist, Hollow Reflecting Light Collector Tube, IBM Technical Discl. 8-74, vol. 17, No. 3, 906-908.
L. B. Richards, Photodetector as Function Detector, IBM Technical Discl. 8-70, vol. 13, No. 3, 591-592.
Fuji Photo Film Co. , Ltd.
Nelms David C.
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