Method and apparatus for laser machining light guides, light guides obtained thereby, and back-lit screens incorporating such light guides
US6467922B1 · kind B1 · utility
47Cited by
8References
19Claims
0Family size
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Key dates
| Filing date | Jul 11, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Aug 2, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a light guide in the form of a plate having a face with a plurality of diffusing patterns obtained by means of a laser beam, wherein said face is exposed to radiation of intensity lying in the range 104 W/cm2 to 107 W/cm2, in particular in the range 3×104 W/cm2 to 3×106 W/cm2, so as to form surface irregularities and irregularities in depth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.