公开(公告)号：US20170176323A1

公开(公告)日：2017-06-22

申请号：US15381167

申请日：2016-12-16

申请人： YOKOGAWA ELECTRIC CORPORATION

发明人： Kodai MURAYAMA ,  Tomohito NOHNO ,  Toyoaki HAMAGUCHI ,  Soukichi FUNAZAKI

IPC分类号： G01N21/21 ,  G01N21/88 ,  G01N33/00

CPC分类号： G01N21/21 ,  G01N21/211 ,  G01N21/8806 ,  G01N33/00 ,  G01N2021/4792 ,  G01N2021/8848 ,  G01N2033/0096 ,  G02B5/04

摘要： A polarization inspector for inspecting an inspection target, the polarization inspector having a polarization divider for spatially dividing at least a reflected beam of light from the inspection target by irradiating an illumination beam into divided beams of lights mutually different in polarization direction; one or more optical receivers for receiving the divided beams of lights and generating an image signal based on the divided beams of lights; and a processor for calculating at least one of an elliptical azimuth angle, a polarization degree and a polarization component intensity from the image signal.

公开(公告)号：US20150145509A1

公开(公告)日：2015-05-28

申请号：US14541725

申请日：2014-11-14

申请人： YOKOGAWA ELECTRIC CORPORATION

发明人： Kazuma TAKENAKA ,  Shinya MITO ,  Satoshi KATO ,  Soukichi FUNAZAKI

IPC分类号： G01V3/08 ,  G01R33/09

CPC分类号： G01V3/08 ,  G01N27/9046 ,  G01R33/09

摘要： A conductive foreign material detecting apparatus includes an exciting coil configured to apply an AC magnetic field to a base substance through which the AC magnetic field passes, a magnetic sensor configured to detect a change of the AC magnetic field caused by a conductive foreign material on a surface of the base substance or in the base substance, a noise reduction coil configured to reduce a noise of substantially the same frequency as the AC magnetic field other than the change of the AC magnetic field by generating predetermined magnetic field to the AC magnetic field, and a current controller configured to control a drive current and a phase of the noise reduction coil so as to make the noise of substantially the same frequency as the AC magnetic field other than the change of the AC magnetic field be minimal.

摘要翻译： 导电异物检测装置包括：励磁线圈，被配置为向交流磁场通过的基础物质施加交流磁场;磁传感器，被配置为检测由导电异物引起的交流磁场的变化， 基体物质的表面或基体物质中的除了交流磁场的变化以外的交流磁场的频率大致相同的噪声的噪声降低线圈，通过对交流磁场产生规定的磁场， 以及电流控制器，被配置为控制所述降噪线圈的驱动电流和相位，以使得除了所述交流磁场的变化之外的与所述AC磁场基本相同的频率的噪声最小。