Method for the wavelength calibration of a spectrometer

Details Method for the wavelength calibration of a spectrometer Method for the wavelength calibration of a spectrometer

2008-05-22

2010-11-23

Evans, F. L (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

C702S104000

Reexamination Certificate

active

07839502

ABSTRACT:
Methods for wavelength calibration of spectrometers are provided which achieve better calibration accuracies than conventional peak search methods. The methods are based on the principle of a stepwise relative shift of corresponding measured-value blocks of a model and calibration spectrum where a correlation value is calculated for each shift step. A shift value is determined for each measured-value block at which the correlation value reaches an optimum. A value pair consisting of a position marker of the measured-value block and the associated shift value is determined for each measured-value block. These value pairs represent the design points for fitting to a suitable assignment function. Coefficients obtained in this manner can be used directly as coefficients of a wavelength assignment or be combined with the coefficients of an existing first wavelength assignment in that they for example replace or are offset against the coefficients of an existing first wavelength assignment.

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