Composite birefringent crystal and filter
US6577445B1 · kind B1 · utility
12Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2000 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Jan 2, 2021 |
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.