Patent ID: 6744524
Filing Date: 2004-06-01
Classification: G01J

Abstract:
A method for calibrating an etalon based optical system, comprising:applying an optical signal, having a known spectral shape, to the etalon; Recording the transmission peaks resulting from application of the optical signal; analyzing the shape of the transmission peaks at selected points in the wavelength domain by determining the centre wavelength, peak transmission and full-width-half-max parameters defining the behavior of the peak transmission and full-width-half-max parameters over the entire wavelength range by interpolating between the selected points and/or extrapolating beyond the points; and applying the center wavelength, peak transmission and full-width-half-max parameters to a formula that approximates the response of the etalon and that is dependent upon the center wavelength, peak transmission and full-width-half-max parameters so that the etalon is calibrated.