Spatial heterodyne spectrometer
US10908023B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2019 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | Jul 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1208
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A conventional spatial heterodyne spectrometer (SHS) comprises a beam splitter and a pair of diffraction gratings, one in each arm of the SHS. The beam splitter separates an input beam of light into first and second sub-beams for transmission to a respective diffraction grating, and then recombines the diffracted sub-beams for focusing onto a camera. A field widened SHS enables much larger range of input angles of the original beam to be focused onto the camera, so that a broader range of wavelengths may be collected. Increasing the range of wavelengths may be provided by one or more of the following: combining the beam splitter with a field widening prism, making one diffraction grating farther from the beam splitter than the other, and placing a plurality of diffraction gratings in each arm of the SHS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.