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:
Mar. 19, 2002
Filed:
Oct. 23, 2000
Mitsuteru Inoue, Okazaki, JP;
Toshitaka Fujii, Toyohashi, JP;
Akio Takayama, Iwata-gun, JP;
Atsushi Kitamura, Iwata-gun, JP;
Shigeyuki Adachi, Iwata-gun, JP;
Hideki Kato, Iwata-gun, JP;
Minebea Co., Ltd., Nagano-Ken, JP;
Abstract
The present invention provides a compact optical isolator. A polarizer A and/or an analyzer B of an optical isolator are/is formed of a cobalt magnetic substance minute particle cluster thin film . The cobalt magnetic substance minute particle cluster thin film can be formed in the form of tape, film or sheet, whereby the thickness of the polarizer A and/or the analyzer B can be made small and in addition thereto, the polarizer and/or the analyzer can be formed integrally with a magneto-optical member which is formed in the form of thin film. More compact dimension and lighter weight can be realized as compared with the prior art in which Rochon prism made of calcite, rutile single crystal having wedge form or polarizing beam splitter is employed as the polarizer and the analyzer.