Composite birefringent crystal and filter
US6671094B2 · kind B2 · utility
2Cited by
1References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2002 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Dec 3, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A stack of two or more birefringent crystals having complimentary properties is arranged to have zero net beam walk-off at off-normal incidence and a finite free-spectral range. In another embodiment, the birefringent crystal materials are selected to provide reduced temperature dependence. The result is an optically and mechanically stable composite birefringent crystal unit. A variety of folded birefringent filters are implemented using the composite birefringent crystal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.