Optical film with increased gain at non-normal angles of incidence
US6057961A · kind A · utility
71Cited by
95References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 28, 1997 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133545
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical film is provided which exhibits increased gain at nonnormal angles of incidence and which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.