Patent Number: 6,166,814

Title: Method and apparatus for color matching paints

Abstract: A method for characterizing a coating comprising a pigment and metallic flakes, said method by directing beams of light toward a coating; measuring the reflectance of light from the coating at the specular angle; measuring the reflectance of light from the coating at one or moren on-specular angles; analyzing said measured light at the specular and non-specular angles as a function of wavelength; and determining the K/S of the pigment and the volume fraction of said metal flakes within the coating from the measurements of the specular and non-specular reflectance; wherein K is the absorption cross-section of the pigment multiplied by its volume concentration; and S is the scattering cross-section of the pigment multiplied by its volume concentration.

Inventors: Pringle; Lon N. (Atlanta, GA)

Assignee: Georgia Tech Research Corp.

International Classification: G01J 3/46 (20060101); G01N 021/55 ()

Expiration Date: 12/26/2017