Method of making high performance optical edge and laser-line filters and resulting products
US7119960B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2005 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Jun 13, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/288
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
High performance optical edge and laser-line filters and methods of making the same are disclosed. The optical edge filters have an edge steepness greater than about 0.8% as measured by dividing (a) the edge width from the 50% transmission wavelength to the optical density 6 (“OD6”) wavelength by (b) the 50% transmission wavelength. The optical edge filters also have an average transmission above about 95%. The laser-line filters have an extremely high transmission in the passband (greater than 90%), an extremely narrow transmission bandwidth, and achieve blocking with an optical density (OD) greater than 5 at wavelengths that differ from the laser wavelength by less than 1% of the laser wavelength. The methods for making such filters accurately determine when deposition of each layer of the filter should terminate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.