Television – Responsive to nonvisible energy – Infrared
Patent
1992-06-08
2000-06-20
Faile, Andrew I.
Television
Responsive to nonvisible energy
Infrared
359132, 359259, 250332, H04N 533, H04J 1402
Patent
active
060783567
ABSTRACT:
A two-dimensional imaging system employs a multiplicity of radiation sensors disposed in an array of rows and columns. In order to couple signals from each of the sensors from an inaccessible location to an accessible location for processing of the sensor signals to produce an image of a subject viewed by the sensors, a fiber optic link employing both frequency multiplexing and frequency modulation of sensor data connects the sensor array with the signal processing equipment. In each column of the array, the sensors produce electrical signals which are coupled via a multiplexer to modulate the frequency of a voltage-controlled oscillator. A plurality of oscillators are provided for the concurrent generation of frequency-modulated signals which are then summed together to produce a composite signal. The composite signal is transmitted via a fiber-optic link to the signal processing equipment wherein the composite signal is demodulated and the frequency contributions of the various sensors are identified. A bank of phase-locked loops may be employed to extract the various frequency components of the composite signal.
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Alkov Leonard A.
Christensen Andrew B
Faile Andrew I.
Lenzen, Jr. Glenn H.
Raytheon Company
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