Apparatus and method of using a thermal design for wavelength division multiplexed holographic filters
US7102803B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Feb 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0218
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A temperature compensated apparatus for filtering light is comprised of a holographically recorded grating defined in a photosensitive layer for providing optical filtration for light incident on the grating with a predetermined angle of incidence, and an angulation means responsive to temperature for tilting the grating relative to the angle of incidence of the light as a function of temperature of the grating so that changes in the filtration by the grating compensate for changes in temperature of the grating to maintain effective filtration of the light approximately constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.