Surface coating characterization method and apparatus

Details Surface coating characterization method and apparatus Surface coating characterization method and apparatus

1983-01-31

1986-02-25

McGraw, Vincent P.

Optics: measuring and testing

Of light reflection

With diffusion

356244, G01N 2147, G01N 2101

Patent

active

045726728

ABSTRACT:
Surface coating films containing metallic flake pigment are characterized by (a) illuminating the film with a parallel beam of light which is inclined at a given angle to the film normal and (b) measuring the intensity of light reflected from a point on the film at a plurality of azimuthal viewing positions located in a circle which lies in a plane parallel to the film and through the center of which passes the film normal at the point. Apparatus suitable for carrying out the measurements is described. The invention enables the frequency distribution of the orientations of the metallic flake in the film to be determined.

REFERENCES:
patent: 3690771 (1972-04-01), Armstrong
patent: 3708233 (1973-01-01), Van Dyk et al.
patent: 3712745 (1973-01-01), Armstrong, Jr. et al.
patent: 4097160 (1978-06-01), Yataki et al.
N. J. Harrick, Internal Reflection Spectroscopy, 1967, John Wiley & Sons, Inc., pp. 76-81.
Van Oene et al. "Control of Alumium Flake in Metallic Color Paints"--Proc. 7th Int. Coating Conference, Athens 1981.
Hemmendinger et al., "A Goniospectrophotometer for Color Measurements", Proc. 1st. AIC Congress, Stockholm 1969.
Roberts et al., J. Coating Technology vol. 51, pp. 59-63 (Jun. 1979).

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