Three direction measurements for characterization of a surface c

Details Three direction measurements for characterization of a surface c Three direction measurements for characterization of a surface c

1982-06-17

1984-10-30

Evans, F. L.

Optics: measuring and testing

By shade or color

Tristimulus examination

G01J 346

Patent

active

044797184

ABSTRACT:
An improved method for instrumentally characterizing the optical properties of a surface containing metallic particles such as a paint containing metallic flakes by using multiangular spectrophotometric or colormetric measurements to derive color constants for the paint, wherein the improvement comprises using three multiangular measurements, preferably 15.degree., 45.degree. and 110.degree. as measured from the specular angle.

REFERENCES:
patent: 3389265 (1965-06-01), Schreckendgust
patent: 3690771 (1972-09-01), Armstrong et al.
patent: 3712745 (1973-01-01), Armstrong et al.
patent: 3916168 (1975-10-01), McCarty et al.

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