Patent ID: 6559945
Filing Date: 2003-05-06
Classification: G01J,G01N

Abstract:
A method of measuring the spectral absorption of a body placed between a source for emitting electromagnetic radiation and a detector for detecting said radiation, the method comprising the following steps:emitting said electromagnetic radiation in a determined spectral range towards said body; filtering the electromagnetic radiation; and detecting the electromagnetic radiation attenuated by the absorption due the body and deducing therefrom a measure of the spectral absorption of said body, the filtering, and detection steps being combined and implemented by a quantum type detector which presents spectral sensitivity having an absorption front at a given wavelength that corresponds to the bandgap of said detector and delivers a signal corresponding to the electromagnetic energy received by said quantum detector, said method including using the absorption front of the spectral sensitivity of the quantum detector to deduce therefrom the measure of the spectral absorption of the body.