公开(公告)号：US5675249A

公开(公告)日：1997-10-07

申请号：US209575

申请日：1994-03-10

Applicant: Robert Downing LaClair

Inventor： Robert Downing LaClair

IPC: G01N1/34 ,  G01N15/06 ,  G01N33/28 ,  G01N27/74 ,  G01J4/02 ,  G01N35/02

CPC classification number: G01N33/2858 ,  G01N1/34 ,  G01N15/0656

Abstract: Apparatus for detecting ferromagnetic debris in a fluid medium in a container includes a plug attachable to the container and having an associated magnetic field preferably produced by a permanent magnet. The plug is at least partly exposed to the fluid to capture debris in the fluid. The apparatus further includes a portable sensor for optically sensing the captured debris, with the sensor having a probe that is connectable to the plug. A method for using such apparatus is provided, and in general a method of detecting ferromagnetic particles in a fluid medium in a container includes the steps of: a) magnetically capturing particles from the fluid using a plug with the container, and b) interrogating the plug with light for captured particles using a portable probe.

Abstract translation: 用于检测容器中的流体介质中的铁磁碎片的装置包括可附接到容器并具有优选由永磁体产生的相关磁场的插头。 塞子至少部分地暴露于流体以捕获流体中的碎屑。 该装置还包括用于光学感测所捕获的碎片的便携式传感器，其中传感器具有可连接到插头的探针。 提供了一种使用这种装置的方法，通常一种在容器中的流体介质中检测铁磁性颗粒的方法包括以下步骤：a）使用具有容器的塞子从流体磁性捕获颗粒，以及b）询问 使用便携式探头插入捕获的颗粒的光。

公开(公告)号：US4725145A

公开(公告)日：1988-02-16

申请号：US822354

申请日：1986-01-24

Applicant: Rasheed M. A. Azzam

Inventor： Rasheed M. A. Azzam

IPC: G01J4/04 ,  G01J4/00 ,  G01N21/21 ,  G01J4/02

CPC classification number: G01J4/00 ,  G01J4/04 ,  G01N21/211

Abstract: An apparatus and method for the measurement of at least one parameter of the state of polarization of a light beam is described. The apparatus includes only a photodetector and no other optical elements. The detector surface is partially specularly reflecting and intercepts the light beam at an oblique angle of incidence. The absorbed fraction of incident radiation produces a corresponding electrical output signal that is detected and from which the at least one parameter of the state of polarization can be determined. The detector may also be rotated to modulate the electrical output signal to determine the elliptic polarization of light except for handedness. A two detector ellipsometer is disclosed wherein light reflected from one detector is absorbed by the second detector and the entire system is rotated.

Abstract translation: 描述了用于测量光束的偏振状态的至少一个参数的装置和方法。 该装置仅包括光电检测器，而不包括其它光学元件。 检测器表面部分镜面反射并以倾斜的入射角拦截光束。 入射辐射的吸收分数产生相应的电输出信号，该信号被检测，并且可从该信号确定极化状态的至少一个参数。 也可以旋转检测器来调制电输出信号以确定除了手感度之外的光的椭圆偏振。 公开了一种两个检测器椭偏仪，其中从一个检测器反射的光被第二检测器吸收并且整个系统被旋转。

公开(公告)号：US3901603A

公开(公告)日：1975-08-26

申请号：US43302674

申请日：1974-01-14

Applicant: TRW INC

Inventor： WHITE PETER G

IPC: G01J4/04 ,  G01J4/02

CPC classification number: G01J4/04

Abstract: Disclosed is an improved polarimeter and polarimetric method. The heart of the polarimeter is a Faraday rod within a concentric coil. The light being analyzed is imaged at a field stop, passed through the rod and, subsequently, through an analyzer. Electric current pulsed through the coil according to a prescribed waveform creates a pulsed magnetic field within the rod, causing the plane of polarization of the incoming light to rotate by an amount varying according to the particular current waveform. This, in turn, creates a varying degree of attenuation, by the analyzer, of the plane polarized component of the light. Means are provided for measuring this variation of attenuation, by which measurement the degree and angle of polarization of the incoming light may be determined, as well as the intensity thereof.

公开(公告)号：US2766652A

公开(公告)日：1956-10-16

申请号：US25967051

申请日：1951-12-03

Applicant: STANTON AUSTIN N

Inventor： STANTON AUSTIN N

IPC: G01J4/02

CPC classification number: G01J4/02

公开(公告)号：US2495703A

公开(公告)日：1950-01-31

申请号：US61505945

申请日：1945-09-07

Applicant: DENNIS ALBERT E

Inventor： DENNIS ALBERT E

IPC: G01J4/02

CPC classification number: G01J4/02

公开(公告)号：US2387825A

公开(公告)日：1945-10-30

申请号：US48847743

申请日：1943-05-26

Applicant: BELL TELEPHONE LABOR INC

Inventor： BOND WALTER L

IPC: G01J4/02

CPC classification number: G01J4/02

公开(公告)号：US1936953A

公开(公告)日：1933-11-28

申请号：US56444831

申请日：1931-09-22

Applicant: ZEISS CARL FA

Inventor： ROBERT RICHTER

IPC: G01J4/02

CPC classification number: G01J4/02

公开(公告)号：US1767831A

公开(公告)日：1930-06-24

申请号：US18550627

申请日：1927-04-21

Applicant: ERNST LEITZ OPTISCHE WERKE

Inventor： MAX BEREK

IPC: G01J4/02

CPC classification number: G01J4/02