Patent ID: RE40249

Claim:
An infrared imaging system, comprising: an infrared focal plane array comprising: a plurality of infrared detector elements arranged in an array; a readout circuit electrically coupled to the plurality of detector elements and comprising means for biasing the plurality of detector elements so as to provide separate detection signals corresponding to each detector element in the array, in response to incident infrared radiation and means for separately correcting offsets in the detection signals Provided provided from the plurality of elements in the detector array to compensate for nonuniformities in the detector elements, wherein said means for correcting comprises: a correction circuit including a plurality of parallel connected circuit elements; and means for selectively electrically connecting said circuit elements into the detector readout circuit in response to stored offset correction values; and output means for providing the corrected detection signals as an output of the focal plane array; means for storing a plurality of offset correction values corresponding to the plurality of detector elements; and means for providing the offset correction values to said means for correcting.