Patent ID: 6605806
Filing Date: 2003-08-12
Classification: G01J,H04N

Abstract:
A system for generating signals representing infrared radiation, comprising:a plurality of infrared detector elements arranged in, a two-dimensional array, the detector elements being biased so that they produce a signal even when no infrared radiation is impinging thereon, the detector elements operable to receive infrared radiation from a reference scene and an actual scene; and a system for determining the output of the detector elements, the system comprising: a bias signal remover operable to receive a first signal representing the reference scene from one of the detector elements and a second signal representing the actual scene from the detector element and remove the bias signal from the second signal, a signal attenuator coupled to the bias signal remover, the signal attenuator operable to attenuate the remaining second signal, a signal integrator coupled to the signal attenuator, the signal integrator operable to integrate the attenuated signal, and a signal sampler coupled to the signal integrator, the signal sampler operable to sample the integrated signal.