Device for detecting electromagnetic radiations

Details Device for detecting electromagnetic radiations Device for detecting electromagnetic radiations

2006-07-04

2006-07-04

Porta, David (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

C250S252100, C250S332000, C250S338100

Reexamination Certificate

active

07071471

ABSTRACT:
A device for detecting electromagnetic radiations implements a detection circuit associated with a reading circuit. The detection circuit includes an array of detection pixels, each comprising a thermal detector of biased bolometric type, and delivering an electric current signal representative of detected radiation. The signal undergoes a double baselining, respectively: a global baselining carried out by means of a thermally isolated bolometer, ensuring extraction from the signal, of a first current of constant value inherent to the biasing of the thermal detector, and an adaptive baselining specific to each of the pixels, carried out by a programmable current generator generating a current for subtraction from the current signal, as a function of the dispersion inherent to the pixel considered relative to a reference signal and stored in an associated memory integrated at the level of each of the pixels.

REFERENCES:
patent: 6028309 (2000-02-01), Parrish et al.
patent: 6610984 (2003-08-01), Knauth et al.

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