Method for calibrating imaging spectrographs

Details Method for calibrating imaging spectrographs Method for calibrating imaging spectrographs

2011-08-16

2011-08-16

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

By dispersed light spectroscopy

Reexamination Certificate

active

07999933

ABSTRACT:
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, referencing a table of known spectral wavelengths and relative intensities, and deriving a spectrograph model based on the spectrograph's physical properties to approximate the observed spectrum, wherein non-linear optimization techniques refine the theoretical model parameters, 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.

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