Process and device for the transmission of a low divergence light beam inserted into an optical fibre for the illumination of pixels in an video image
US5892556A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Nov 24, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a suggested process for the transmission of a light bundle which is provided for illuminating picture points of a video picture and has a divergence angle and beam diameter determined by the way in which the light bundle is generated, the light bundle being coupled into a light guide and coupled out with an optical system for bundling a transmitted light bundle exiting the light guide, a divergence angle for the light bundle exiting the light guide is adjusted, by means of the optical system, proportionally to the divergence angle given by the manner in which the light bundle is generated, wherein the proportionality factor is the ratio of the given beam diameter before being coupled into the light guide to the beam diameter of the light bundle emerging from the optical system. A video system for carrying out the process has a suitably dimensioned optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.