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:
Dec. 08, 2020
Filed:
Jun. 13, 2019
Ngk Insulators, Ltd., Nagoya, JP;
Jungo Kondo, Miyoshi, JP;
Naotake Okada, Anjo, JP;
Shoichiro Yamaguchi, Ichinomiya, JP;
Keiichiro Asai, Nagoya, JP;
Shuhei Higashihara, Nagoya, JP;
Yuichi Iwata, Nagoya, JP;
Tetsuya Ejiri, Kasugai, JP;
Akira Hamajima, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A phosphor element comprises: a support substrate; an optical waveguide for propagating an excitation light through the waveguide, the optical waveguide comprising a phosphor generating a fluorescence, and the optical waveguide comprising an emission side end surface emitting the excitation light and the fluorescence, an opposing end surface opposing the emission side end surface, a bottom surface, a top surface opposing the bottom surface and a pair of side surfaces; a bottom surface side clad layer covering the bottom surface of the optical waveguide; a top surface side clad layer covering the top surface of the optical waveguide; side surface side clad layers covering the side surfaces of the optical waveguide, respectively; a top surface side reflection film covering the top surface side clad layer; side surface side reflection films covering the side surface side clad layers, respectively; and a bottom surface side reflection film provided between the support substrate and the bottom surface side clad layer.