Measuring instruments

Details Measuring instruments Measuring instruments

1978-09-08

1980-08-19

Corbin, John K.

Optics: measuring and testing

Of light reflection

With diffusion

250578, 356445, G01N 2148

Patent

active

042181445

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.

REFERENCES:
patent: 3999864 (1976-12-01), Mutter

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