Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1992-08-17
1993-07-06
Willis, Davis L.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
343911L, H01J 4014, H01Q 1508
Patent
active
052256685
ABSTRACT:
An electromagnetic field sensor apparatus which measures the field strength and phase of an incident electromagnetic field as well as the angle of arrival of an incident electromagnetic field. The electromagnetic field sensor apparatus comprises a Luneberg lens which focuses an incoming planar electromagnetic wave entering on one side of the Luneberg lens onto a point on the opposite side of the lens. A photonic sensor is positioned on the Luneberg lens at the point upon which the electromagnetic wave is focused. A light source is located along an optical path which passes through the photonic sensor for transmitting polarized light through the sensor. The photonic sensor modulates the polarized light passing therethrough when the photonic sensor detects the incident electromagnetic wave. A photodetector located along the optical path detects the modulated light as it exists from the photonic sensor. In this manner incident electromagnetic fields may be detected and measured without having scattered fields effect the measurement.
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Hilliard Donald P.
Mensa Dean L.
Kalmbaugh David S.
Pham Hoa Q.
Sliwka Melvin J.
The United States of America as represented by the Secretary of
Willis Davis L.
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