Polarizer with an array of tapered waveguides
US5521726A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Aug 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133528
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention includes a polarizer element and an array of tapered waveguides in substantial contact with the polarizer element. The tapered end of each of the waveguides extends outward from the polarizer element. Each of the waveguides has a light input surface adjacent the polarizer element and a light output surface distal from the light input surface. The area of the light input surface of each of the waveguides is greater than the area of its light output surface. Also, the waveguides in the array are separated by interstitial regions with a lower refractive index than the refractive index of the waveguides. The present improved polarizer may be used in display devices, such as projection display devices, off screen display devices, and direct view displays. Such displays are used in a wide range of applications including computer terminals, airplane cockpit displays, automotive instrument panels, televisions, and other devices that provide text, graphics, or video information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.