Spectrometer for VNIR spectrometry
US11022488B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2019 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Jun 19, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1861
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrometer is disclosed, comprising: a light source configured to receive light from a scene; a diffraction grating configured to receive a light beam from the light source and to disperse the light beam to form a dispersed light beam, the diffraction grating comprising an axis of normal incidence and a plurality of grooves, these defining a plane that includes the axis of normal incidence and which is normal to the grooves; a detector configured to detect the dispersed light beam; wherein the angle of incidence, between the light beam and the axis of normal incidence in the plane, is 5 to 8 degrees, and the out-of-plane angle, between the light beam and the axis of normal incidence outside the plane is 1.5 to 4 degrees. A correcting lens may be provided, disposed between the diffraction grating and the detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.