Radiant energy – Infrared-to-visible imaging – Including detector array
Patent
1991-09-27
1993-03-23
Fields, Carolyn E.
Radiant energy
Infrared-to-visible imaging
Including detector array
250214A, H01L 3108
Patent
active
051967030
ABSTRACT:
A method of detecting the intensity of radiation emanating from an object 116 relative to a background level at a pixel detector 120 is disclosed herein. A resistive element 122 with a resistance dependent upon the intensity of radiation impinging the detector 120 and having first and second terminals is provided along with an integration element 124 coupled to the first terminal of the resistive element. The first terminal is set to a reference voltage. The radiation is then defocused such that the radiation impinging the detector 120 is proportional to the background radiation level and a first voltage is applied to the second terminal of the resistive element 122 such that the integration element 124 discharges to a background voltage level. Next, the radiation is focused such that the radiation impinging the detector 120 is proportional to the radiation emanating from the object 116 and a second voltage is applied to the second terminal of the resistive element 122 such that the integration element 124 charges to an output voltage V.sub.o level. The output voltage V.sub.o is then sensed. Other systems and methods are also disclosed.
REFERENCES:
patent: 5038026 (1991-08-01), Krause
Donaldson Richard L.
Fields Carolyn E.
Kesterson James C.
Matsil Ira S.
Texas Instruments Incorporated
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