Uniaxially collimated light source for optical shaft angle encod

Details Uniaxially collimated light source for optical shaft angle encod Uniaxially collimated light source for optical shaft angle encod

1982-03-05

1985-04-02

Willis, Davis L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

045089655

ABSTRACT:
An optical shaft angle encoder uses novel slit emitters having a long, narrow, configuration coupled with collimation lenses to utilize emitted light beams having an improved degree of collimation in an axis perpendicular to radial axes of a rotating code wheel and, thereby, to provide a higher quality generated electrical waveform which is used to describe shaft rotation. The slit emitters are narrowed to improve collimation uniaxially and lengthened to increase the total power of the emitted light.

REFERENCES:
patent: 3999064 (1976-12-01), Kramer
patent: 4263506 (1981-04-01), Epstein
patent: 4317032 (1982-02-01), Hanus et al.
patent: 4319134 (1982-03-01), Weber

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