The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 1995
Filed:
Jun. 01, 1993
Donald P Hilliard, Oxnard, CA (US);
Dean L Mensa, Ventura, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An electromagnetic field sensor for use in a target seeking missile which asures the amplitude, phase, frequency and polarization of an incoming electromagnetic field as well as the angle of arrival of the incident electromagnetic field. A Luneberg lens is mounted in the radome of the missile. The Luneberg lens focuses an electromagnetic wave reflected from a target which then passes through the radome and enters the Luneberg lens on one side of the lens onto a point on the opposite side of the lens. A photonic sensor which may be a single electro-optic modulator or a pair of electro-optic modulators is positioned on the Luneberg lens at the point upon which the incident electromagnetic wave is focused. When a pair of electro-optic modulators are used as the sensor the sensing axis of one of the electro-optic modulators is generally perpendicular to the sensing axis of the other electro-optic modulator. Polarized light is provided to each electro-optic modulator of the sensor along an optical path which passes through the modulator. Each electro-optic modulator modulates the polarized light passing therethrough when the electro-optic modulator detects the incident electromagnetic wave. A photo-detector located along the optical path for each electro-optic modulator detects the modulated light as it exits from the electro-optic modulator.