Optical encoder

Details Optical encoder Optical encoder

1995-03-13

1997-09-23

Font, Frank G.

Optics: measuring and testing

By polarized light examination

With light attenuation

356374, 356376, G01B 1114

Patent

active

056710526

ABSTRACT:
An optical encoder comprising a movable scale moving relatively to a light source, a surface-emitting semiconductor laser light-source for radiating a part of the movable scale, and a photodetector for receiving reflection light by the movable scale or transmission light through the movable scale.

REFERENCES:
patent: 3881113 (1975-04-01), Rideout et al.
patent: 5129725 (1992-07-01), Ishizuka et al.
Nikkei Mechanical, Jul. 1988; pp. 54-62.

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