Light reflectance instrument

Details Light reflectance instrument Light reflectance instrument

1974-12-27

1977-06-14

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

26 70, 356210, 356238, G01N 2148, G01N 2116, G01N 2132

Patent

active

040294200

ABSTRACT:
An instrument for measuring light reflectance from fabric and the like materials which have a heterogeneous surface configuration includes an aperture defining a sensing area, three light sources for illuminating the sensing area, and a photoelectric cell for detecting light reflected from the material in the sensing area. The light sources are mounted at 120.degree. with respect to one another around an outer periphery of the cell. The cell is mounted coaxially with respect to and a spaced distance from the aperture. Each light source is mounted on a line which passes through the center of the aperture and is at an angle of 30.degree. with respect to an axis of the aperture.

REFERENCES:
patent: 2321722 (1943-06-01), Zelony
patent: 2882785 (1959-04-01), Biesele, Jr.
patent: 3512894 (1970-05-01), Wood
patent: 3554656 (1971-01-01), Eicken
patent: 3782836 (1974-01-01), Fey et al.
patent: 3846027 (1974-11-01), Hyman et al.

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