Shaft encoder with an optical system comprising two straight-lin

Details Shaft encoder with an optical system comprising two straight-lin Shaft encoder with an optical system comprising two straight-lin

1983-06-08

1986-03-18

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340347P, G01D 534

Patent

active

045771014

ABSTRACT:
An optical measuring system for determining angular displacements of an object, including a radial grating connected to the object. Optical elements including two straight-line-generatrix surfaces focus the grating image as a parallel grating image onto a linear array radiation-sensitive detection system. The linear array may be photodiodes functioning as a grating-like element.

REFERENCES:
patent: 3973119 (1976-08-01), Renes et al.
patent: 3985448 (1976-10-01), Wilkund et al.
patent: 4143268 (1979-03-01), Marold et al.
patent: 4247769 (1981-01-01), Warner

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