公开(公告)号：US20070057668A1

公开(公告)日：2007-03-15

申请号：US11459157

申请日：2006-07-21

申请人： Seong-Jae Lee ,  Sang-Hoon Song ,  Yevgen Melikhov ,  Choon-Mahn Park ,  Hans Hauser ,  David Jiles

发明人： Seong-Jae Lee ,  Sang-Hoon Song ,  Yevgen Melikhov ,  Choon-Mahn Park ,  Hans Hauser ,  David Jiles

IPC分类号： G01N27/82

CPC分类号： G01N21/21 ,  G01D5/145 ,  G01N21/1717

摘要： A system and method to detect angular rotation, linear displacement and/or surface deformations is presented. The method is based on the ability of a linear polarized light to interact with magnetic materials and to change its polarization angle due to Faraday effect. A basic structure of the system consists of a magneto-optic (MO) film with a two-domain structure and a single domain wall which are generated by gradient magnetic field produced by opposite polarity permanent magnets placed near the film. An AC magnetic field applied perpendicular to the MO film surface causes the magnetic domain wall in the MO film to oscillate at the same frequency. This leads to a detected output AC modulated signal. By measuring the temporal changes in this signal, information on angular rotation, linear displacement and/or surface deformation can be obtained.

摘要翻译： 提出了检测角旋转，线性位移和/或表面变形的系统和方法。 该方法基于线性偏振光与磁性材料相互作用并由于法拉第效应而改变其偏振角的能力。 系统的基本结构由具有双畴结构的磁光（MO）膜和由放置在膜附近的相反极性永磁体产生的梯度磁场产生的单畴壁组成。 垂直于MO膜表面施加的AC磁场使得MO膜中的磁畴壁以相同的频率振荡。 这导致检测到的输出AC调制信号。 通过测量该信号的时间变化，可以获得关于角旋转，线性位移和/或表面变形的信息。

公开(公告)号：US07365533B2

公开(公告)日：2008-04-29

申请号：US11459157

申请日：2006-07-21

申请人： Seong-Jae Lee ,  Sang-Hoon Song ,  Yevgen Melikhov ,  Choon-Mahn Park ,  Hans Hauser ,  David Jiles

发明人： Seong-Jae Lee ,  Sang-Hoon Song ,  Yevgen Melikhov ,  Choon-Mahn Park ,  Hans Hauser ,  David Jiles

IPC分类号： G01R33/032 ,  G02F1/09

CPC分类号： G01N21/21 ,  G01D5/145 ,  G01N21/1717

摘要： A system and method to detect angular rotation, linear displacement and/or surface deformations is presented. The method is based on the ability of a linear polarized light to interact with magnetic materials and to change its polarization angle due to Faraday effect. A basic structure of the system consists of a magneto-optic (MO) film with a two-domain structure and a single domain wall which are generated by gradient magnetic field produced by opposite polarity permanent magnets placed near the film. An AC magnetic field applied perpendicular to the MO film surface causes the magnetic domain wall in the MO film to oscillate at the same frequency. This leads to a detected output AC modulated signal. By measuring the temporal changes in this signal, information on angular rotation, linear displacement and/or surface deformation can be obtained.

摘要翻译： 提出了检测角旋转，线性位移和/或表面变形的系统和方法。 该方法基于线性偏振光与磁性材料相互作用并由于法拉第效应而改变其偏振角的能力。 系统的基本结构由具有双畴结构的磁光（MO）膜和由放置在膜附近的相反极性永磁体产生的梯度磁场产生的单畴壁组成。 垂直于MO膜表面施加的AC磁场使得MO膜中的磁畴壁以相同的频率振荡。 这导致检测到的输出AC调制信号。 通过测量该信号的时间变化，可以获得关于角旋转，线性位移和/或表面变形的信息。