Measuring instruments
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United States of America Patent
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-
Aug 19, 1980
Grant Date -
N/A
app pub date -
Sep 8, 1978
filing date -
Sep 9, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical sensing instrument for detecting specular and/or non-specular reflections of light from a surface under test has a sensor head with a plane face having a semi-circular recess in which are housed a plurality of light sources and a plurality of photodetectors each having an associated lens, the optical axis of which passes through the center of curvature of the semi-circular recess. The photodetectors and the light sources are positioned such that respective source/detector pairs are located on optical axes which form mirror angles with respect to the axis of symmetry of the sensing head. Means are provided for simultaneously energizing one or more selected light sources and one or more of the photodetectors.
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Cited Art Landscape
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