Nonuniform holographic filter in a spectroscopic system
US5221957A · kind A · utility
45Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1992 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Jun 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/32
- 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.