Light filtering apparatus
US7258456B2 · kind B2 · utility
1Cited by
3References
37Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2004 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Nov 16, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/46
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light filtering apparatus includes a first dispersion device, a spatial filter and a second dispersion device. The first dispersion device is arranged to cause spatial dispersion of an incident light beam as a function of its frequency. The spatial filter is arranged to filter the dispersed light beam so as to produce a spatially filtered resultant beam. The second dispersion device is arranged to recombine the dispersed and filtered light beam so as to produce an output light beam having a substantially similar spectrum at any position within the output beam cross-section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.