Optical assembly with high performance filter
US6404953B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1999 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | May 25, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29361
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Optical assembly for controlling or limiting undesirable photon entrance, reflection, departure, or appearance. A material opaque to unwanted photons can be applied to an optical assembly that would otherwise allow penetration of the unwanted photons. For example, a filter can be applied to a waveguide member. A first face surface of the filter faces toward an end of the waveguide member and a second face surface of the filter faces away from that member end. A mask adheres to one of the filter surfaces. The mask is substantially opaque in at least some selected spectral region to impact the extent to which photons in that spectral region can pass through the filter and to the waveguide member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.