Patent ID: 7254503

Claim:
A method of correcting one or more reflectance values when a center wavelength of one or more light sources used to generate corresponding light signals is different from a specified center wavelength for the one or more light sources, the method comprising the steps of: A. defining, for each of the one or more light sources, a reference spectral distribution {L*} that is characteristic of the one or more light sources and composed of reference light intensity values over a set of reference wavelengths; B. defining, for each of the one or more light sources, a spectral distribution {L} comprising actual light intensity values over the set of wavelengths; C. determining the actual reflectance R of a set of reflected signals; D. defining a set of detector sensitivity data {D} corresponding to the set of detectors receiving the set of reflected signals; E. determining high resolution reflectance values {r}; F. determining a correction factor as a function of {L}, {L*}, {r} and {D}; and G. applying the correction factor to R to determine R*.