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. 08, 2003
Filed:
Apr. 02, 2002
Takeshi Matsushita, Iwata-gun, JP;
Mitsuteru Inoue, Okazaki, JP;
Hideki Kato, Iwata-gun, JP;
Akio Takayama, Iwata-gun, JP;
Minebea Co., Ltd., Miyota-machi, JP;
Abstract
A Faraday rotator is provided which obtains excellent optical characteristics with a small number of layers. In the Faraday rotator, a metal reflective film is formed on a substrate, then a first periodic dielectric multilayer film made of silicon dioxide SiO and tantalum pentaoxide Ta O , a magneto-optical thin film, and a second periodic dielectric multilayer film made of tantalum pentaoxide Ta O and silicon dioxide SiO are formed sequentially. The number of layers of the first periodic dielectric multilayer film is larger than that of the second periodic dielectric multilayer film. Incident light from a polarizer passes through the periodic dielectric multilayer films, is reflected at the metal reflective film, returns through the periodic dielectric multilayer films, and passes through an analyzer to exit out.