The invention relates to a method and an apparatus for measuring spectral responsivity of IR optical detectors irradiated with ionising radiation. The claimed method consists in measuring simultaneously, on two channels, the spectral responsivity for both a standard detector and a detector whose spectral responsivity is to be determined, such that all the possible perturbations influence, identically and simultaneously, the two measuring channels, in view of the common rejection of these perturbing signals.
National Institute for Laser, Plasma and Radiation Physics