JP5119523B2 - 近傍電磁界測定装置 - Google Patents
近傍電磁界測定装置 Download PDFInfo
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- JP5119523B2 JP5119523B2 JP2005004925A JP2005004925A JP5119523B2 JP 5119523 B2 JP5119523 B2 JP 5119523B2 JP 2005004925 A JP2005004925 A JP 2005004925A JP 2005004925 A JP2005004925 A JP 2005004925A JP 5119523 B2 JP5119523 B2 JP 5119523B2
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- electromagnetic field
- frequency
- probe
- near electromagnetic
- modulation
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Description
土屋昌弘・山崎悦史・若菜伸一・岸眞人「光ファイバ端磁気光学(FEMO)プローブによる微小領域マイクロ波帯磁界分布測定」,日本応用磁気学会誌Vol. 26, No. 3, 2002, pp. 128-134"
2 光源
3 光変調器
4 変調信号源
5 偏光子などの波面整合光学系
6 プローブ
7 偏光子などの検波光学系
8 光電変換器
9 濾波器
10 検波回路
11 電圧測定回路
12 検体
13,15 偏光ビームスプリッタ
14 ファラデー素子
16 8/λ波長板
17 電気光学素子
18 検出器
Claims (2)
- 光源(2)と,
前記光源の出力光を変調するための変調器(3)と,
前記変調器を制御する変調信号を発生するための変調信号源(4)と,
前記変調手段の出力光の波面をプローブに整合するように調整するための波面整合光学系(5)と,
前記波面整合光学系(5)からの出力光を,検体が発生する近傍電磁界によって変調するための電気光学素子又は磁気光学素子を具備するプローブ(6)と,
前記プローブの出力光から前記近傍電磁界の成分を含む出力光を取り出すための検波光学系(7)と,
前記検波光学系が取り出した前記近傍電磁界の成分を含む出力光を電気信号に変換するための光電変換器(8)と,
前記光電変換器の出力信号から所定の周波数成分を有する信号を抽出するための濾波器(9)と,
前記濾波器の出力信号を測定するための測定装置(10,11)を具備し,
前記変調信号源(4)は,
前記変調器の変調周波数をf1[Hz]とし,
前記検体の発する近傍電磁界の周波数をfS[Hz]としたときに,
前記濾波器(9)が抽出する所定の周波数成分を有する信号は,|f1−fS|であり,
前記変調信号源(4)により発生される前記変調信号を制御して,前記|f1−fS|が400kHz〜500kHzの範囲となるように,前記変調器の変調周波数f 1 を調整する
近傍電磁界測定装置。
- 光源(2)と,
前記光源の出力光を変調するための変調器(3)と,
前記変調器を制御する変調信号を発生するための変調信号源(4)と,
前記変調手段の出力光の波面をプローブに整合するように調整するための波面整合光学系(5)と,
前記波面整合光学系(5)からの出力光を,検体が発生する近傍電磁界によって変調するための電気光学素子又は磁気光学素子を具備するプローブ(6)と,
前記プローブの出力光から前記近傍電磁界の成分を含む出力光を取り出すための検波光学系(7)と,
前記検波光学系が取り出した前記近傍電磁界の成分を含む出力光を電気信号に変換するための光電変換器(8)と,
前記光電変換器の出力信号から所定の周波数成分を有する信号を抽出するための濾波器(9)と,
前記濾波器の出力信号を測定するための測定装置(10,11)を具備し,
前記変調信号源(4)は,
前記変調器の変調周波数をf1[Hz]とし,
前記検体の発する近傍電磁界の周波数をfS[Hz]としたときに,
前記濾波器(9)が抽出する所定の周波数成分を有する信号は,|f1−fS|であり,
前記変調信号源(4)により発生される前記変調信号を制御して,|f1−fS|/ f1が,1/1000以下となるように,前記変調器の変調周波数f 1 を調整する
近傍電磁界測定装置。
Priority Applications (1)
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JP2005004925A JP5119523B2 (ja) | 2005-01-12 | 2005-01-12 | 近傍電磁界測定装置 |
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JP2005004925A JP5119523B2 (ja) | 2005-01-12 | 2005-01-12 | 近傍電磁界測定装置 |
Publications (2)
Publication Number | Publication Date |
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JP2006194663A JP2006194663A (ja) | 2006-07-27 |
JP5119523B2 true JP5119523B2 (ja) | 2013-01-16 |
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JP2005004925A Expired - Fee Related JP5119523B2 (ja) | 2005-01-12 | 2005-01-12 | 近傍電磁界測定装置 |
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JP (1) | JP5119523B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5219023B2 (ja) * | 2007-10-26 | 2013-06-26 | 独立行政法人情報通信研究機構 | 電界、電圧または磁界用測定プローブ |
JP5471614B2 (ja) * | 2010-03-05 | 2014-04-16 | 日本電気株式会社 | 計測装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61241630A (ja) * | 1985-04-19 | 1986-10-27 | Japan Aviation Electronics Ind Ltd | 光ビ−ト周波数測定装置 |
JPS6388469A (ja) * | 1986-10-02 | 1988-04-19 | Sumitomo Electric Ind Ltd | 電界及び磁界の光式検出装置 |
JP3352543B2 (ja) * | 1994-09-29 | 2002-12-03 | 浜松ホトニクス株式会社 | 電圧測定装置 |
JP3364333B2 (ja) * | 1994-09-19 | 2003-01-08 | 浜松ホトニクス株式会社 | 減衰特性測定装置 |
JP3500216B2 (ja) * | 1995-02-07 | 2004-02-23 | 浜松ホトニクス株式会社 | 電圧測定装置 |
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- 2005-01-12 JP JP2005004925A patent/JP5119523B2/ja not_active Expired - Fee Related
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