Birefringent-biased sensor having temperature compensation
US5694205A · kind A · utility
19Cited by
3References
8Claims
0Family size
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Key dates
| Filing date | Oct 19, 1995 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Oct 19, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/241
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A birefringent bias is provided to an optical sensor by the addition of one or more single birefringent elements where the total birefringence-length product remains within the accepted tolerances of current devices. The bias provided by two or more elements is such that where each element has a birefringence, a dB/dT and a coefficient of thermal expansion term, the elements are arranged in tandem so that the combined birefringence terms equal the required birefringence bias and the dB/dT and coefficient of thermal expansion terms effectively cancel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.