Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1992-07-31
1993-07-27
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
25112901, G01B 1114, F16K 3102
Patent
active
052314693
ABSTRACT:
The displacement of a valve stem (16) is measured during diagnostic testing by temporarily mounting a laser head (112) on the valve body (18) or yoke (20), for generating a source laser beam (118) that reflects from a target (120) that moves with the stem. The timing of the reflected beam (132) returning to the head (112) relative to the projection of the source beam, gives an indication of the displacement of the stem.
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Keyence LB Series Laser Brochure (pp. 4-7).
Hayes John
Jeffers Larry
Combustion Engineering Inc.
Mulholland John H.
Pham Hoa Q.
Ristas L. James
Rosenberger Richard A.
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