Procedure for analyzing reciprocating motion

Details Procedure for analyzing reciprocating motion Procedure for analyzing reciprocating motion

1983-12-08

1987-01-20

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

162263, 250561, 356 5, G01B 1114

Patent

active

046377271

ABSTRACT:
A procedure for analyzing the reciprocating motion of a given object or its motion component transversal to the object's direction of travel, based on the passage time of electromagnetic radiation in the optical range and wherein by a light source, such as a laser or photodiode, a periodic light beam is directed on the object. The change of the passage times of light pulses that have travelled to the object and been reflected back therefrom, in relation to a given reference value, is transformed into an analog voltage proportional to the change.

REFERENCES:
patent: 4496428 (1985-01-01), Wells
Berdahl, NASA Tech. Briefs, vol. 5, No. 4, Winter 1980, p. 433.

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