Signal processor for infrared camera
First Claim
1. A signal processor for use with an array of detectors, each detector having an amplifier associated therewith and each amplifier providing gain, the processor comprising:
- means for compensating for a DC offset of each detector of the array;
means for correcting variations in the sensitivity of each detector amplifier, the second means providing a digital video signal;
a D/A converter for converting the digital video signal to an analog video signal;
means for scaling an input to the D/A converter; and
means for adding blanking signals and sync pulses to the analog video signal.
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Accused Products
Abstract
An analog signal processor for use with an array of uncooled detectors. Each detector has an amplifier associated therewith and each amplifier provides gain. A first circuit (212, 294, 300, 220) is included for compensating for a DC offset of each detector/amplifier pair of the array. A second circuit (250, 294, 300) corrects for variations in the sensitivity of each detector/amplifier pair. As a result, the outputs each of the detector/amplifier pairs in response to a common input signal are equalized. In a specific implementation, additional circuits are included providing global automatic DC level control across the array (270, 280, 294, 300), global automatic gain control across the array (250, 262, 294, 300) and frame-to-frame offset adjustment (212, 230).
17 Citations
8 Claims
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1. A signal processor for use with an array of detectors, each detector having an amplifier associated therewith and each amplifier providing gain, the processor comprising:
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means for compensating for a DC offset of each detector of the array; means for correcting variations in the sensitivity of each detector amplifier, the second means providing a digital video signal; a D/A converter for converting the digital video signal to an analog video signal; means for scaling an input to the D/A converter; and means for adding blanking signals and sync pulses to the analog video signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification