Patent ID: 6791085
Filing Date: 2004-09-14
Classification: G01J,H04N

Abstract:
A device for generating an image from an IR radiation comprising a detection module (1) including a plurality of heat detectors (2) each having a specific electric resistance and being polarised so as to deliver a signal representing a detected IR radiation, said device comprising a read module (8) intended to convert said electric signal into a signal which can be used by an image processing block (18) and an electric signal compensation module (10) comprising a first branch (12) making it possible to carry out a first thresholding intended to extract from said electric signal a first constant value signal due to the polarisation of the heat detectors (1), a device characterised in that the compensation module (10) comprises at least one second branch (30) making it possible to carry out a second thresholding intended to extract from the electric signal resulting from the first thresholding at least one second low-level signal due to the dispersion of the electric resistances of the heat detectors and/or to the fluctuations in the temperature of the focal plane of the detection module.