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:
Nov. 01, 2005
Filed:
Apr. 16, 2002
Osamu Mitomi, Nagoya, JP;
Takenori Ichigi, Konan, JP;
Masatsugu Oshima, Nagoya, JP;
Jun Okumura, Nagova, JP;
Kenji Aoki, Ogaki, JP;
Masataka Yamashita, Nagoya, JP;
Osamu Mitomi, Nagoya, JP;
Takenori Ichigi, Konan, JP;
Masatsugu Oshima, Nagoya, JP;
Jun Okumura, Nagova, JP;
Kenji Aoki, Ogaki, JP;
Masataka Yamashita, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
An optical device consisting of a core layer, a first clad layer in contact with the core layer, a second clad layer, third clad layer and at least one electrode for applying a certain voltage or supplying a certain current. The second clad layer is deposited on the third clad layer and the core layer is provided between the first clad layer and the second clad layer. The core layer, first clad layer, second clad layer and third clad layer consist of a material with a negative refractive index variation coefficient, and the third clad layer has a refractive index smaller than that of the second clad layer.