Holographic Lippmann-Bragg filter in a spectroscopic system
US5153670A · kind A · utility
38Cited by
6References
6Claims
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Key dates
| Filing date | Jan 12, 1990 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Jan 12, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/1838
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A holographic filter comprises a volume hologram recorded with Bragg surfaces for use in spectroscopic and spectral splitting applications. The Bragg planes in the holographic filter can be recorded to satisfy virtually any design constraint imposed upon the filter such as Raman, Lippmann, non-Snellian (slanted), curved, and multiplexed spectral filters. The holographic filter achieves maximal reduction of secondary maxima and sidelobes and obtains large wavelength selectivities, and varied grating constants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.