Readhead for reflectance measurement of distant samples

Details Readhead for reflectance measurement of distant samples Readhead for reflectance measurement of distant samples

1987-07-16

1991-07-02

Rosenberger, Richard A.

Optics: measuring and testing

Of light reflection

With diffusion

G01N 2147

Patent

active

050281399

ABSTRACT:
Reflectance apparatus is disclosed for obtaining measurement of nonspecular reflected light in which controlled light rays are directed along a transmission path from a light source through a plurality of light traps to expose or illuminate a specimen and nonspecular reflected light is passed from the specimen through the light traps along a transmission path to one or more detectors where the nonspecular reflected light is measured, the detector's field of view being larger than the illuminated area of the specimen over a wide range of specimen to source and detector distances.

REFERENCES:
patent: 4632559 (1986-12-01), Brunsting
patent: 4676653 (1987-06-01), Strohmeier et al.

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