Optical polarizing films with designed color shifts
First Claim
1. An optical film, comprising a plurality of optical layers adapted to provide a reflection band covering a portion of the visible spectrum at an oblique angle such that the optical film appears colored at such oblique angle, and wherein the plurality of layers provide substantially no reflection bands for normally incident light.
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Abstract
Multilayer films are provided that exhibit a colored appearance when viewed at an oblique angle as a result of one or more reflection bands in the visible region of the spectrum. The films however provide no substantial reflection bands in either the visible or near infrared regions for light normally incident on the film. The films can be made to shift from clear at normal incidence to an arbitrary designed color at an oblique angle without necessarily becoming cyan.
57 Citations
16 Claims
- 1. An optical film, comprising a plurality of optical layers adapted to provide a reflection band covering a portion of the visible spectrum at an oblique angle such that the optical film appears colored at such oblique angle, and wherein the plurality of layers provide substantially no reflection bands for normally incident light.
Specification