Distance measuring device and method

Details Distance measuring device and method Distance measuring device and method

1978-04-14

1980-04-22

Corbin, John K.

Optics: measuring and testing

By polarized light examination

With light attenuation

33125B, 356241, G01B 1114

Patent

active

041992580

ABSTRACT:
A distance measuring device especially suitable for use in a method of measuring the internal configuration of a tube is disclosed herein. This device utilizes at least one photodetecting arrangement including a plurality of individual photocells and means for mounting the photocells in a linear array. The device also includes at least one optical fiber for directing a beam of light from a source towards a point on the surface to be measured, for example, on the inner surface of a tube, and means for supporting the optical fiber and array of photocells relative to one another and to the surface to be measured such that the beam is reflected off of the point and onto a particular one of the photocells, depending upon the distance between these points and the array of photocells.

REFERENCES:
patent: 2596024 (1952-05-01), Goble et al.
patent: 3637314 (1972-01-01), Groot
patent: 3667846 (1972-06-01), Nater et al.
patent: 3977468 (1976-08-01), Brewer et al.
patent: 4040738 (1977-08-01), Wagner

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