Array of optically-controlled elements for the diffusion of elec

Details Array of optically-controlled elements for the diffusion of elec Array of optically-controlled elements for the diffusion of elec

1989-01-17

1990-01-23

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Combined with diverse-type device

343754, H01J 4014

Patent

active

048960330

ABSTRACT:
The main object of the invention is an array of optically-controlled elements for the diffusion of electromagnetic energy. The invention pertains to an array capable of diffracting the electromagnetic energy which illuminates it, certain elements of the said array being capable of modulation. The device according to the invention comprises photodetectors which can be used for the optical modulation of the emitting/reflecting elements, whether diffusing or diffracting. The optical modulation provides for the individual control of each radiating element up to very high frequencies. Furthermore, the device according to the invention can be used to reduce the complexity of an array by doing away with the control wiring. The invention can be applied chiefly to the making of radar-testing devices, for example the simulation of bright points, the ultra-high-frequency tomography of the human body and the making of beacons.

REFERENCES:
patent: 3222601 (1965-12-01), Sartorio et al.
patent: 4507662 (1985-03-01), Rottenberg et al.
patent: 4552151 (1985-11-01), Bolomey et al.
IEEE Transactions On Microwave Theory And Techniques, vol. MTT-29, No. 11, Nov. 1981, pp. 1225-1231, IEEE, N.Y., U.S.; R. J. King et al.; "Probing Amplitude, Phase, and Polarization of Microwave Field Distributions in Real Time".
IEEE Transactions On Microwave Theory And Techniques, vol. 30, No. 11, Nov. 1982, pp. 1998-2000, IEEE, New York, U.S.; J. Ch. Bolomey et al.: "Microwave Diffraction Tomography For Biomedical Applications".
Patents Abstracts of Japan, vol. 6, No. 200 (E-135) [1078], 9 Oct. 1982; & JP-A-57 107 607 (Tokyo Shibaura Denki K. K.).

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