Optical displacement sensor

Details Optical displacement sensor Optical displacement sensor

1981-08-03

1984-04-17

Punter, William H.

Optics: measuring and testing

By polarized light examination

With light attenuation

356 5, 356375, G01B 1114, G01C 308

Patent

active

044431074

ABSTRACT:
A device and method for accurately sensing the direction and magnitude of small displacements between two objects, independent of the distance between the objects, utilizing a monochromatic light source and a reflector to produce a light standing wave pattern and a transparent photosensitive detector to detect the number of crests and/or nodes of the light standing wave pattern intercepted.

REFERENCES:
patent: 3326078 (1967-06-01), Clarke et al.
patent: 4181901 (1980-01-01), Heyke
patent: 4209241 (1980-06-01), Nanba et al.
patent: 4223215 (1980-09-01), Chamran et al.
Compton, Jr., M. E., "Surveying with the Velocity of Light", Surveying & Mapping, Jul.-Sep., 1954, pp. 283-292.
Christensen et al., "Photoconductive Cell", RCA Tech. Note #516, 3-1962.
Born et al., "Principles of Optics", Fifth Ed., Pergamon Press, 1975, pp. 277-281.

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