Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-10-28
1995-06-06
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250237G, 354409, G01D 534
Patent
active
054224799
ABSTRACT:
An optical type encoder, which detects a light beam from a light source by a light receiver through a plurality of slit arrays of a gauge member provided to an object to be detected, and detects position information of the object to be detected by utilizing a signal from the receiver, is disclosed. The light receiver includes a plurality of sensors which are arranged in a direction parallel to a position detection direction and are capable of detecting the incident position of a light beam. The plurality of slit arrays of the gauge member are arranged in correspondence with the plurality of sensors, so that a plurality of slits of each slit array are aligned in the position detection direction. All the positional relationships between the corresponding slits in one slit array and the other slit array of the plurality of slit arrays are different from each other.
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Canon Kabushiki Kaisha
Le Que T.
Nelms David C.
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