Optical shaft angle encoder

Details Optical shaft angle encoder Optical shaft angle encoder

1978-12-21

1981-05-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

042661250

ABSTRACT:
An optical comparator has three bifurcated and truncated lenses, each lens having two siamesed and truncated elements having closely spaced optical axes. This results in an optical encoder having a low sensitivity to eccentricity errors.

REFERENCES:
patent: 3138714 (1964-06-01), Heidenhain
patent: 3770970 (1973-11-01), Trump

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