Optical encoder having a transparent lens plate with an array of

Details Optical encoder having a transparent lens plate with an array of Optical encoder having a transparent lens plate with an array of

1991-08-30

1992-10-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023116, 359210, G01D 534

Patent

active

051534371

ABSTRACT:
An optical encoder is used for detecting the position, speed, acceleration etc. of a moving or rotating object. The optical encoder includes a light source, a collimator lens for collimating a light emitted from the light source, a transparent lens plate having an array of lenses formed therein at regular intervals, and a light detector located on a focal plane of the lenses lying on the side opposite to the collimator lens with respect to the lens plate.

REFERENCES:
patent: 4987301 (1991-01-01), Nakamura
patent: 5073710 (1991-12-01), Takagi et al.

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