Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1991-12-10
1992-09-15
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
356401, G01N 2186
Patent
active
051480387
ABSTRACT:
A device for detecting a positional relationship between opposed first and second objects. The device includes a light source for projecting light to the first and second objects; a photodetecting system for detecting two lights from one of the first and second objects illuminated by the light from the light source, the photodetecting system detecting those two lights the position of incidence of each of which on a predetermined plane is changeable with the positional relationship between the first and second objects in a direction perpendicular to the direction in which the first and second objects are opposed; a position detecting system for detecting the positional relationship between the first and second objects in a direction perpendicular to the opposing direction of the first and second objects, on the basis of the relationship of the two lights, on the predetermined plane, as detected by the photodetecting system; and an interval detecting system for detecting the positional relationship between the first and second objects in the opposing direction, by using at least one of the two lights detected by the photodetecting system.
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Abe Naoto
Nose Noriyuki
Canon Kabushiki Kaisha
Nelms David C.
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