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:
Oct. 09, 1990
Filed:
Mar. 13, 1989
Jim P Lee, Nepean, CA;
Abstract
A high signal reception efficiency, multi-channel Bragg cell is provided for an interferometric acoustooptic signal processor. The Bragg cell comprises a block of acoustooptic material which is illuminated on one block surface by a laser beam. A plurality of sets of electroacoustic transducers are mounted on another surface of the block which is normal to the first block surface and each transducer set is responsive to the output of a different one of a plurality of antennae so that the laser beam is acoustooptically modulated by the signal outputs from the antennae as it passes through the block. The transducers are arranged in a phased array comprising the plurality of transducer sets. A Fourier transform lens receives and focusses the modulated beam from the block to produce a two dimensional display which represents the power spectrum of the antennae outputs as a function of the angles of incidence of the antennae with respect to an incoming electromagnetic wavefront.