Angular position measuring apparatus

Details Angular position measuring apparatus Angular position measuring apparatus

1974-10-09

1976-02-24

Borchelt, Archie R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250236, 250578, 350 6, 350285, G01D 534

Patent

active

039406091

ABSTRACT:
Angular position measuring apparatus includes a prism mounted on a shaft whose angular position is to be determined, and a light source for directing a beam of light onto the prism. The prism is formed so that the light beam enters one surface of the prism and is refracted by another surface and caused to be directed in different directions as the prism, and thus the shaft, is rotated. Also included is an array of photo detectors positioned so that the refracted light impinges on various ones of the photo detectors depending upon the angular position of the shaft. The photo detector on which the light impinges is thereby caused to generate an electrical signal which is applied to utilization apparatus.

REFERENCES:
patent: 2168886 (1939-08-01), Roberts
patent: 2447344 (1948-08-01), Kliever
patent: 3475552 (1969-10-01), Makino et al.
patent: 3667850 (1972-06-01), Smith et al.
Photoelectric Electric Circuit Breaker, F. B. Porterfield, IBM Technical Disclosure Bulletin, Vol. 1, No. 4, Dec. 1958, p. 8.

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