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:
Aug. 29, 1978
Filed:
Jun. 07, 1977
Norman J Berg, Baltimore, MD (US);
Bob L Smith, deceased, late of Huntsville, AL (US);
by Allen Adams, legal representative, Cupertino, CA (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
An acousto-optic correlator device comprised of two parallel piezoelectric rystals having different acoustic velocities. Acoustic transducers are located at one end of the respective crystals, and high frequency acoustic waves, the pulse envelopes of which correspond to the signals to be correlated are simultaneously launched from the transducers on the respective crystals. One of the acoustic waves 'slides' past the other, and a laser beam, which is directed approximately perpendicular to the direction of acoustic propagation is modulated by the acoustic waves. The laser beam is demodulated and the desired correlation is obtained.