Optical position detector having first and second spaced apart s

Details Optical position detector having first and second spaced apart s Optical position detector having first and second spaced apart s

1988-11-08

1990-02-13

Willis, Davis I.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250561, H01J 4014

Patent

active

049009133

ABSTRACT:
An optical position sensor employs two pairs of light emitting elements and photo sensing elements. Each pair of the light emitting element and the photo sensing element are arranged in a spaced apart relationship with the other pair in a direction of movement of the moving object. The distance between the pairs of the light emitting elements and the photo sensing elements substantially corresponds to the length of the moving object.

REFERENCES:
patent: 4550273 (1985-10-01), Boettcher

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