Method for wavelength calibration in an echelle spectrometer

A spectrometer module (10), and continuous spectral line light source comprises a (11), which is used for generating a linear the spectrum pre-monochromator (2), a can be selected a spectrum part, wherein spectral bandwidth is less than or equal to of the step spectrum the ordinal the free spectral area, bandwidth spectrum interval's central wavelength of designated capable of the subdivision reflection test efficiency, a wave with calibration device with spectrometer (4), on the pre-monochromator (2) is an seam (21), wherein the belts seam (3) is seam module (50), and is arranged on the spectrometer outlet, aSpatial resolutions light detector (5) for detecting wavelength spectrum. The of the module characterized in that: The middle seam (3) is greater than in the middle of the seam of the entrance seam monochromatic lens of the pre-monochromator is produced, and method for with the pre-monochromator's device; the device to be used to the continuous spectral line light source the calibration on detecting to the reference position.