Depth/height measuring device

Details Depth/height measuring device Depth/height measuring device

1990-10-01

1992-02-11

Evans, F. L.

Optics: measuring and testing

For optical fiber or waveguide inspection

356378, 356382, G01B 1106, G01B 1122

Patent

active

050871218

ABSTRACT:
A device for measuring depth of a groove formed on an article includes a light source for illuminating the article, a first detector for receiving light from a portion of the article having a groove and being illuminated by the light source, and for detecting a spectral reflectance in relation to the received light, a second detector for receiving light from the article illuminated by the light source and for detecting a spectral reflectance in relation to the received light, the second detector being effective to detect the spectral reflectance in a way not affected or substantially not affected by the groove of the article as compared with the detection by the first detector, and a depth detector for detecting the depth of the groove on the basis of the results of detection by the first and second detectors.

REFERENCES:
patent: 4236823 (1980-12-01), Roach et al.
patent: 4615620 (1986-10-01), Noguchi et al.
patent: 4787749 (1988-11-01), Ban et al.

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