Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-07-12
1991-05-14
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
358494, H01J 314
Patent
active
050158465
ABSTRACT:
A light source control apparatus comprises light source means for producing first and second beams, a first scan surface to which the first beam is applied, a second surface to which the second beam is applied, scanning means for causing the first and second beams to scan the first and second surfaces, respectively, a fluorescent optical fiber disposed along a scanning direction of the second beam for emitting fluorescent light in response to the second beam incident thereto and transmitting the fluorescent light, and photodetecting means for detecting the fluorescent light. A part of the outer surface of the fluorescent optical fiber can be the second scan surface which has alternately arranged transparent regions and opaque regions, thereby further reducing the number of components of the apparatus.
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"Study of Laser Scanning Position Detecting System", Proceedings of the Spring Meeting of the Precision Machine Society, 1983, pp. 827-828.
Iwama Masatoshi
Okuyama Takashi
Asahi Kogaku Kogyo K.K.
Nelms David C.
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