Photopolarimeters and spectrophotopolarimaters with multiple diffraction gratings
US7221454B2 · kind B2 · utility
1Cited by
5References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 13, 2003 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | May 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/447
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a device for measuring the complete polarization state of light over a spectral bandwidth, an optical input signal (41) with wavelengths of light within a spectral band is incident on two or more diffraction gratings (42, 44, 46, 48), or incident from at least two directions on one or more diffraction gratings (72, 74), and the intensity is measured as a function of wavelength for at least four of the diffraction spectra produced by the grating(s). The polarization state of light is then calculated as a function of wavelength over the spectral bandwidth from the intensity measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.