Patent ID: 6410916
Filing Date: 2002-06-25
Classification: G01J,G01N,H04N

Abstract:
A high resolution wide angle infrared camera operating at room temperature, comprising:an integrated array having a plurality of infrared detectors, each of said detectors including a matched pair of photoresistors in close proximity to each other, one of the photoresistors in said pair being an active photoresistor, and the other photoresistor of said pair being a blind photoresistor, wherein said blind photoresistor is shielded from incident infrared signals; means for connecting each said pair of photoresistors so as to provide a differential output thereby canceling a dark current, wherein said differential output is applied across an integration capacitor; optics for focusing an infrared signal onto said integrated array; a readout integrated circuit coupled to said infrared detector array for providing a multiplexed output corresponding to the differential outputs of said photoresistors; and a processor for scanning and processing said multiplexed output from said readout integrated circuit.