Array of optically-controlled elements for the diffusion of electromagnetic energy
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United States of America Patent
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Jan 23, 1990
Issued Date -
N/A
app pub date -
Jan 17, 1989
filing date -
Apr 22, 1986
priority date (Note) -
Expired
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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.
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