Laser illumination device
US8224133B2 · kind B2 · utility
133Cited by
4References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2008 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | May 15, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An Electrically Switchable Bragg Grating (ESBG) despeckler device comprising at least one ESBG element recorded in a hPDLC sandwiched between transparent substrates to which transparent conductive coatings have been applied. At least one of said coatings is patterned to provide a two-dimensional array of independently switchable ESBG pixels. Each ESBG pixel has a first unique speckle state under said first applied voltage and a second unique speckle state under said second applied voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.