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. 04, 2003
Filed:
Dec. 11, 2000
Applicant:
Inventors:
Atsushi Ohido, Nihonbashi, JP;
Kazuhito Yamasawa, Nihonbashi, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/09 ;
U.S. Cl.
CPC ...
G02F 1/09 ;
Abstract
A magnetooptical device which defines a Faraday rotation angle &thgr; expressed by 44 deg.≦&thgr;≦46 deg. when light having a wavelength &lgr; (1570 nm≦&lgr;≦1620 nm) impinges thereupon. A magnetic garnet material expressed by a general formula: Bi M1 Fe M2 O is used. M1 is at least one kind of element that is selected from among Y, La, Eu, Gd, Ho, Yb, Lu and Pb; M2 is at least one kind of element that is selected from among Ga, Al, Ti, Ge, Si and Pt; and a and b satisfy 1.0≦a≦1.5 and 0≦b≦0.5, respectively.