Spectrometer and method for correcting wavelength displacement of spectrometer
US7116417B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2004 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Feb 21, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/2866
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrometer for correcting a displacement of a dispersed light image having a light source for outputting a monochromatic ray of light, an optical system which images a dispersed light image of the monochromatic ray through an incident slit on an imaging plane, a sensor array, and a calculator for calculating a variation in an imaging position of a primary dispersed light image of the monochromatic ray through the incident slit on the imaging plane from its initial position as a first image displacement amount, and a variation in an imaging position of a secondary dispersed light image of the monochromatic ray through the incident slit from its initial position as a second image displacement amount, and calculating, based on the first and second image displacement amounts, a third image displacement amount which is free of an influence due to a fluctuation of a wavelength of the monochromatic ray.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.