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. 03, 1982
Filed:
Jun. 12, 1980
Applicant:
Inventor:
I-Cheng Chang, Sunnyvale, CA (US);
Assignee:
Itek Corporation, Lexington, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350358 ; 350372 ; 350373 ;
Abstract
An electronically tunable optical filter utilizing noncollinear acousto-optic interaction in a birefringent crystal. The directions of optical and acoustic waves are chosen so that large angular aperture is obtained for an interaction geometry wherein the light beam is perpendicular to the group velocity of the acoustic wave. The transverse configuration provides maximum optical aperture for the tunable acousto-optic filter.