Accession Number : ADD008988
Title : Three & Four Product Surface-Wave Acousto-Optic Time Integrating Correlators.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC
Personal Author(s) : Abramovitz,Irwin J ; Berg,Norman J ; Casseday,Michael W
Report Date : 02 Nov 1981
Pagination or Media Count : 18
Abstract : This abstract discloses a method and device for processing spread-spectrum and other wideband communications and radar signals to obtain three and four product correlated signals. A laser beam is split and shaped into first and second sheet beams. The first beam is directed to a first acousto-optic medium where it is doubly diffracted by first and second signals. The second beam is directed to a second acousto-optic medium which is spatially rotated 90 degs relative to the first acousto-optic medium where the second sheet beam is either singly diffracted by a third signal or doubly diffracted by a third signal and a fourth signal. The diffracted sheet beams are shaped into square beams, combined and directed to a photodiode area array.
Descriptors : *Patent applications, *Optical correlators, *Acoustooptics, *Signal processing, Spread Spectrum, Receivers, Diffraction analysis, Optical circuits, Surface waves, Broadband, Piezoelectric transducers, Lithium niobates
Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
Acoustooptic and Optoacoustic Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE