Thermal Image Dynamic Range Expander.
Patent, Filed 6 May 85 patented 6 Jan 87,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A gas cell array absorbs infrared energy radiated by a viewed scene. A laser interferometer has its resultant intensity changed by the cells changing length. This is monitored by a vidicon tube that feeds the signal to a digitizer and onto a video display. The incident infrared radiation is chopped into quantized amounts of energy and memory units receive the digitized output of the vidicon tube. Subtractors receive vidicon tube signals simultaneously with quiescent reference levels data. The subtractors form a difference signal by subtracting the quiescent reference level signal from the immediate extended dynamic range of 1,0001 is accomplished for the preferred embodiment. Keywords Patents. jhd
- Infrared Detection and Detectors