Brief description of the signal for the detection of infrared of the target, in particular a low thermal contrast, and circuit óoeuvre.

摘要

The invention relates to a method and a circuit for processing a signal output by a charge-transfer detector and intended for forming images in the target search phase and target tracking phase. The method consists in particular in, on the one hand, non-linearly amplifying the signal SE from the detector (2) by amplifying the low-level signals more and in increasing the sensitivity of the signal after coding and, on the other hand, in correcting the signal SE of the deviations from non-uniformity and from continuous level upstream of the non-linear amplification. The circuit for implementation includes in particular an adder (10), a non-linear amplifier (11) coupled to a sampler/coder (15), one output of which is connected to a circuit (16) for increasing sensitivity, and another output of which is connected to a processor (18) which delivers a corrected signal SX to be subtracted from the input signal SE through the intermediary of the adder (10). Application to weak signature target detection, in particular in the presence of counter measures (pyrotechnic decoys, jammers). IMAGE