Static information storage and retrieval – Read/write circuit – Optical
Patent
1983-05-13
1986-05-13
Popek, Joseph A.
Static information storage and retrieval
Read/write circuit
Optical
365108, G11C 700
Patent
active
045890986
ABSTRACT:
A method of optical data processing employs a modulable source of light which illuminates an optical assembly. A storage location selector is employed to apply a second modulating signal to an address selected storage location of a charge storage register. A charge storage register provides a selected storage cell with a potential of the modulating signal. After storing the predetermined potential variation in the charge storage register the potential of each cell is applied through an optical modulator to the photocell of a photodetector arrangement. The optical properties of each modular element is controlled through the potential of the associated cell of the charge storage resistor in a manner such that the intensity of the light falling on the photocell is a function of the total intensity incident on the optical assembly and also a function of the voltage applied in the respective modular element. The charges produced by the photocells of the photodetector arrangement are delivered by means of a disconnectable photocharge transfer gate to the charge storage locations of a CCD shift register where they are integrated. The apparatus comprises a modulable source of light in an optical assembly for carrying out the method. The optical assembly includes a storage location selector, a charge storage register including n cells for receiving the modulating signals of the storage location selector. Also included is a modulator arrangement including n modulator elements, a photodetector arrangement including n photocells and each photocell is associated with the modulator element in a manner such that the modulator element covers the entire service area of the photocell. The photocharge transfer gate includes an input for a control signal and an analog CCD shift register. It has an input for a timing signal. It also has an input for an analog signal and an output for an analog signal.
REFERENCES:
patent: 4498156 (1985-02-01), Pizzarello
Messerschmitt-Bolkow-Blohm GmbH
Popek Joseph A.
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