Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1993-02-22
1994-03-01
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
2502082, 356400, G01N 2186
Patent
active
052910237
ABSTRACT:
A position detecting system for detecting the relative position of two objects is disclosed wherein: light is projected to the two objects so that the light from the two objects is received by a position detector; to an output signal from the detector is applied a weight coefficient corresponding to the position to determine a gravity center of the light incident; a region of the position detector is set on the basis of the determination; the gravity center of the light incident is determined again on the basis of the set region; and the relative position of the two objects is determined on the basis of the second determination.
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Abe Naoto
Hasegawa Masanobu
Yoshii Minoru
Canon Kabushiki Kaisha
Davenport T.
Nelms David C.
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