| 发明名称 |
Optical magnetic field sensor employing differently sized transmission lines |
| 摘要 |
A magneto-optical element is of a rare-earth iron garnet crystal expressed at least by formula 1, and a element in whose composition range the value of X is set at 0.8</=X</=1.3; that of Y at 0.2</=Y</=0.4; that of Z at 0.1</=Z</=0.9; and that of W at 0</=W</=0.3; and R element is made at least one or more kinds of rare-earth elements. An optical magnetic field sensor is composed in such a manner that light diffracted by magnetic domain structure of rare-earth iron garnet crystal can be detected up to a higher-order light by optical fiber on light output side through optical system arrangement. A magnetic field measuring equipment composed of the optical magnetic field sensor has a linearity error of +/-1.0% or less within a magnetic field range 5.0 Oe to 200 Oe, and allows a measuring accuracy higher than with prior art equipment.(BiXGdYRZY3-X-Y-Z)(Fe5-WGaW)O12(formula 1)
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| 申请公布号 |
US5635830(A) |
申请公布日期 |
1997.06.03 |
| 申请号 |
US19950547870 |
申请日期 |
1995.10.25 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
ITOH, NOBUKI |
| 分类号 |
G01R33/032;(IPC1-7):G01R31/00;G01R29/00 |
主分类号 |
G01R33/032 |
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