Polarizing apparatus for polarizing instant light having planes of polarization to light having a particular plane of polarization and method of manufacturing the polarizing apparatus
US6624859B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1998 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Jan 22, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A polarizing apparatus extracts light amount of which is increased by incidence of light (10, 12) having a plurality of planes of polarization, and by aligning the planes of polarization. This polarizing apparatus can be used as a polarizer for a liquid crystal display device (optical transducer), or can be disposed as a preliminary stage before a polarizer. Molecules of an optically active material (1) rotates the plane of polarization through an optical rotation angle &thgr;1 when a first vector component 10 of light having a horizontal plane of polarization passes, and rotates the plane of polarization through an optical rotation angle &thgr;2 (>&thgr;1) when a second vector component of light having a vertical plane of polarization passes. Therefore, light having a horizontal plane of polarization is amplified, and light having a vertical plane of polarization is reduced. To bestow the anisotropy of the optical rotation angle on the large number of molecules making up the optically active material molecular constituents of the optically active material are substantially aligned in three dimensions. By this means, the efficiency of use of the incident light can be increased, and…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.