The manner which does the calibration of the imaging spectrograph

摘要

Disclosed is a method for calibrating optical spectrographs and in particular optical spectrographs having focal plane array detectors. The method comprises the steps of detecting a spectrum of a known source (50), referencing a table of known spectral wavelengths and relative intensities (30), and deriving a spectrograph model based ON the spectrograph's physical properties to approximate the observed spectrum (40), wherein non-linear optimization techniques refine the theoretical model parameters (60,70,80), thereby minimizing the residual difference between observed and calculated spectral intensities in an iterative process producing a set of physical model parameters that best describe the modeling spectrograph for calibration of subsequent spectral acquisitions.