Method and apparatus for correcting a visible light beam using a wire-grid polarizer
US7375887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2004 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Apr 28, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3058
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system and method for providing a visible light beam with a desired characteristic includes a visible light source producing a visible light beam defining an optical train. An optical element is disposed in the optical train to create a modified beam, and that is capable of introducing an undesired characteristic that continuously transitions across at least a portion of the modified beam. A wire-grid polarizer is disposed in the optical train, and has a plurality of elongated elements with at least a portion that continuously transitions to a different characteristic. The wire-grid polarizer is positioned and oriented in the optical train with the different characteristic corresponding to the undesired characteristic of the modified beam to obtain a visible light beam with a desired characteristic substantially across the visible light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.