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. 19, 1988
Filed:
Sep. 28, 1984
Applicant:
Inventor:
I-Cheng Chang, Sunnyvale, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350372 ; 350358 ;
Abstract
An electronically tunable optical filter utilizing noncollinear acousto-optic interaction in a birefringent crystal. Light is diffracted by a secondary acoustic wave generated from a primary acoustic wave by mode conversion at an internal surface of the birefringent crystal. A preferred configuration is described in which the primary acoustic wave is excited by acoustical transducers bonded to the same face as the optical aperture. The configuration has the advantages of simpler construction and improved performance.