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公开(公告)号：US20050029436A1
公开(公告)日：2005-02-10
申请号：US10879222
申请日：2004-06-28
CPC分类号： G01D5/145 , G01D5/266 , G01D5/35303
摘要： A micro-position sensor and sensing system using the Faraday Effect. The sensor uses a permanent magnet to provide a magnetic field, and a magneto-optic material positioned in the magnetic field for rotating the plane of polarization of polarized light transmitted through the magneto-optic material. The magnet is independently movable relative to the magneto-optic material so as to rotate the plane of polarization of the polarized light as a function of the relative position of the magnet. In this manner, the position of the magnet relative to the magneto-optic material may be determined from the rotated polarized light. The sensing system also includes a light source, such as a laser or LED, for producing polarized light, and an optical fiber which is connected to the light source and to the magneto-optic material at a sensing end of the optical fiber. Processing electronics, such as a polarimeter, are also provided for determining the Faraday rotation of the plane of polarization of the back-reflected polarized light to determine the position of the magnet relative to the sensing end of the optical fiber.
摘要翻译： 使用法拉第效应的微位置传感器和感测系统。 传感器使用永久磁铁提供磁场，以及位于磁场中的磁光材料，用于旋转透过磁光材料的偏振光的偏振平面。 磁体可相对于磁光材料独立地移动，以便作为磁体的相对位置的函数旋转偏振光的偏振平面。 以这种方式，可以从旋转的偏振光确定磁体相对于磁光材料的位置。 感测系统还包括用于产生偏振光的光源，例如激光器或LED，以及在光纤的感测端连接到光源和磁光材料的光纤。 还提供诸如旋光仪的处理电子设备，用于确定背反射偏振光的偏振平面的法拉第旋转，以确定磁体相对于光纤的感测端的位置。
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公开(公告)号：US07183765B2
公开(公告)日：2007-02-27
申请号：US10879222
申请日：2004-06-28
IPC分类号： G01R33/032 , G01B7/14
CPC分类号： G01D5/145 , G01D5/266 , G01D5/35303
摘要： A micro-position sensor and sensing system using the Faraday Effect. The sensor uses a permanent magnet to provide a magnetic field, and a magneto-optic material positioned in the magnetic field for rotating the plane of polarization of polarized light transmitted through the magneto-optic material. The magnet is independently movable relative to the magneto-optic material so as to rotate the plane of polarization of the polarized light as a function of the relative position of the magnet. In this manner, the position of the magnet relative to the magneto-optic material may be determined from the rotated polarized light. The sensing system also includes a light source, such as a laser or LED, for producing polarized light, and an optical fiber which is connected to the light source and to the magneto-optic material at a sensing end of the optical fiber. Processing electronics, such as a polarimeter, are also provided for determining the Faraday rotation of the plane of polarization of the back-reflected polarized light to determine the position of the magnet relative to the sensing end of the optical fiber.
摘要翻译： 使用法拉第效应的微位置传感器和感测系统。 传感器使用永久磁铁提供磁场，以及位于磁场中的磁光材料，用于旋转透过磁光材料的偏振光的偏振平面。 磁体可相对于磁光材料独立地移动，以便作为磁体的相对位置的函数旋转偏振光的偏振平面。 以这种方式，可以从旋转的偏振光确定磁体相对于磁光材料的位置。 感测系统还包括用于产生偏振光的光源，例如激光器或LED，以及在光纤的感测端连接到光源和磁光材料的光纤。 还提供诸如旋光仪的处理电子设备，用于确定背反射偏振光的偏振平面的法拉第旋转，以确定磁体相对于光纤的感测端的位置。
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