Optical angular/linear motion detector

Details Optical angular/linear motion detector Optical angular/linear motion detector

1984-09-19

1986-05-06

McGraw, Vincent P.

Optics: measuring and testing

By polarized light examination

With birefringent element

356 73, G01P 336

Patent

active

045868212

ABSTRACT:
Angular movements of an object are detected using a laser beam reflected m a mirror on the object and focussed on the edge of a straight edge in front of a photodetector. The same laser beam may be used with the same photodetector to simultaneously or separately form a Michaelson interferometer for detecting linear movements of the object. Alternatively, two photodetectors may be used such that linear and the combination of rotational and angular movements are detected simultaneously, and three photodetectors are used to detect simultaneously linear, rotational, and the combination of linear and rotational movements. In all embodiments, a telescope multiplies mirror movement by the magnifying power of the telescope.

REFERENCES:
patent: 2151631 (1939-03-01), Williams
patent: 3224323 (1965-12-01), Chitayat

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