Optical polarizing films with designed color shifts
US7256936B2 · kind B2 · utility
36Cited by
20References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2006 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Jun 16, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2495
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.