Spectrometry device
US12235157B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2020 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | May 24, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/4538
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrometry device wherein light rays emitted from an object face measurement point combine into one parallel light beam by an objective lens, this is divided into a first and second light beam by a phase shifter, and the first and second light beam emit toward a light-receiving face of a photodetector while providing an optical path length difference. A light-shielding plate is arranged on a face optically conjugate the object face respective to the objective lens, and only light passed through translucent portions of the light-shielding plate is directed to the objective lens. A lateral length of each light-shielding plate translucent portion and the interval between two adjacent translucent portions are based on the objective lens focal length, the distance from the phase shifter to the photodetector light-receiving face, a photodetector pixel pitch, a pixel length, and a predetermined wavelength range of the light emitted from the measurement point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.