Patent ID: 7839502

Claim:
A method for the wavelength calibration of a spectrometer on which at least the data of two measured-value blocks of a model spectrum are present, comprising the steps: (a) determining the intensity spectrum of a light source on the spectrometer as a calibration spectrum, (b) cutting out a measured-value block from the calibration spectrum which corresponds to one of the measured-value blocks present on the spectrometer of the model spectrum, (c)shifting the measured-value block of the calibration spectrum in a step-wise manner relative to the measured-value block of the model spectrum and determining in each case a correlation value between the two measured-value blocks, (d) determining a shift value at which the correlation value reaches an optimum, (e) determining a value pair consisting of a position marker of the measured-value block of the model spectrum and the shift value, (f) repeating process steps (b) to (e) for all further measured-value blocks of the model spectrum, (g) fitting the value pairs obtained in process steps (b) to (f) consisting of the position marker of the respective measured-value block of the model spectrum and the associated shift value, to an assignment function to obtain the coefficients a 0 , a 1 . . . , (h) using these coefficients to determine a wavelength assignment of the spectrometer.