Retroreflectometer and method for measuring retroreflectivity of

Details Retroreflectometer and method for measuring retroreflectivity of Retroreflectometer and method for measuring retroreflectivity of

1998-04-16

2000-12-26

Font, Frank G.

Optics: measuring and testing

Of light reflection

G01N 2147

Patent

active

061668133

ABSTRACT:
A system and method for measuring the retroreflectivity of materials. The system comprises a light source and a first optical pathway along which an illumination light beam travels originating from the light source and ending at a retroreflective surface to be measured. Also, a second optical pathway is provided along which a retroreflected beam travels back from the retroreflective surface to a sensor array. A processor is electrically coupled to the sensor array with an accompanying memory on which is stored operating logic adapted to determine the intensity of a predetermined pattern of the retroreflected beam incident to the sensor array which defines the retroreflected light which propagates from the retroreflective surface at a predetermined observation angle.

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patent: 4373819 (1983-02-01), Pallotta
patent: 4721389 (1988-01-01), Dejaiffe
patent: 5233186 (1993-08-01), Ringlien

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