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:
Jul. 12, 2022
Filed:
Jan. 02, 2019
Ngk Insulators, Ltd., Nagoya, JP;
Jungo Kondo, Miyoshi, JP;
Naotake Okada, Anjo, JP;
Tetsuya Ejiri, Kasugai, JP;
Keiichiro Asai, Nagoya, JP;
Shoichiro Yamaguchi, Ichinomiya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
An optical scanning device includes a supporting body; an optical waveguide composed of a single crystal having electro-optic effect and integrated with the supporting body directly or through a clad layer; a plurality of periodic domain inversion parts formed in the optical waveguide, the periodic domain inversion parts having periods different from each other; and a plurality of electrodes capable of applying voltages on the periodic domain inversion parts, respectively, to generate diffraction gratings in the periodic domain inversion parts, respectively. The clad layer is composed of a material having a refractive index lower than a refractive index of the single crystal forming the optical waveguide. Each of the periodic domain inversion parts on which the voltage is applied is selected to generate the diffraction grating in the selected periodic domain inversion part so that a propagation light propagated in the optical waveguide is emitted to the outside of the optical scanning device as a diffracted light.