Patent ID: 6157489
Filing Date: 2000-12-05
Classification: C01P,C09C,C09D,G02B,Y10S,Y10T

Abstract:
A color shifting multilayer interference film, comprising:a first absorber layer;a first dielectric layer on the first absorber layer;a reflector layer on the first dielectric layer;a second dielectric layer on the reflector layer, the second dielectric layer composed of the same material as the first dielectric layer; anda second absorber layer on the second dielectric layer, the second absorber layer composed of the same material as the first absorber layer;wherein the first and second dielectric layers have an index of refraction of greater than 1.65 and an optical thickness at a design wavelength that provides a discrete color shift such that the film has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.