Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1980-03-24
1982-02-02
Britton, Howard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358213, H04N 718
Patent
active
043142753
ABSTRACT:
A scanning type infrared imaging system comprising a lens system, a scanner, an infrared sensing matrix and a signal processor. Said lens system is for focusing infrared energy emanating from a scene onto the infrared sensing matrix. Said scanner is for scanning the infrared energy emanating from the scene. Said infrared sensing matrix is for converting the infrared energy into charge packets representative of the impinging infrared energy, and said signal processor is for processing the electrical signals into video signals. Said infrared sensing matrix comprises an array of charge transfer device elements arranged in rows and columns. Each element has four electrodes for receiving phase 1, phase 2, phase 3 and phase 4 pulses. The phase 3 and phase 1 electrodes are for transfer gates and the phase 2 and phase 4 electrodes are for charge storage wells. The pulses applied to the charge storage wells move the packet charges down the parallel-column shift registers at a rate substantially equal to the scanning rate of the scanner thereby providing time delay with integration of the charge packets before the signal leaves the infrared sensing charge transfer device matrix. To provide charge storage wells of sufficient depth to hold the integrated charge packets the pulses applied to each succeeding stage potential well electrodes or groups of electrodes are increased in voltage. The charge packets from the parallel-column registers are clocked out by a serial shift register to a floating gate or diode where the charge packet creates a voltage signal for signal processing by the signal processor.
REFERENCES:
patent: 3912927 (1975-10-01), Hoffman
patent: 3953733 (1976-04-01), Levine
patent: 4129887 (1978-12-01), Michon
patent: 4231149 (1980-11-01), Chapman
IEEE Transactions on Electron Devices, vol. ED-27, No. 1, Jan. 1980, "Monolithic Hg Cd Te Charge Transfer Device Infrared Imaging Array".
Britton Howard
Comfort James T.
Grossman Rene E.
Sharp Melvin
Texas Instruments Incorporated
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