Light filter having a wedge-shaped profile
US7576860B2 · kind B2 · utility
11Cited by
20References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2007 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Mar 17, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/255
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light filter includes exactly one partially reflective layer having a top and a bottom and a wedge-shaped profile defining a wedge direction. First and second transparent layers are disposed on the top and bottom, respectively, of the partially reflective layer, each transparent layer including at least two dielectric layers of two different materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction. A photospectrometer including a light filter with the wedge-shaped profile is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.