Thin-film optical retarders
US8094270B2 · kind B2 · utility
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13References
29Claims
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Key dates
| Filing date | Nov 29, 2006 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Dec 24, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/115
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An oblique angle deposition is used to provide an A-plate optical retarder having at least one dense, form-birefringent layer. According to one embodiment, the dense, form-birefringent layer(s) are deposited as part of an FBAR stack to provide an all-dielectric full-function A/−C-plate trim retarder for LCD birefringence compensation. Advantageously, the dense structure of the full-function A/−C-plate trim retarder offers high durability and/or stability, thus making it well suited for providing polarization compensation in high light flux polarization-based projection systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.