Method for compensating a spectrum drift in a spectrometer

US10094712B2 · kind B2 · utility

Assignee

• SPECTRO ANALYTICAL INSTRUMENTS GMBH · DE

Inventors

• Lutz Neitsch · Hamminkeln, DE
• Markus Neienhuis · Kleve, DE

Key dates

• Filing date: Nov 9, 2017
• Grant date: Oct 9, 2018
• Expiry date: Nov 9, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2003/2813
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for compensating spectrum drift in a spectrometer having a radiation source, optical apparatus to split up a spectrum into spectral lines according to wavelengths of radiation from the radiation source, a number of detectors to receive partial spectra, and which are provided with respective pluralities of pixels to measure radiation intensity, and a catalog of spectral lines of different chemical elements that may be used as correction lines. The method may include generating and recording an emission spectrum of a sample; determining pixels receiving the maximum of the peaks for respective partial spectra and identifying respective peak positions for the peak maxima; for the respective peak positions, determining if there is a correction line within a predetermined maximum distance from the peak position, and if so, calculating a distance between the peak position and the correction line; and calculating a correction function for assignment of peak positions.