公开(公告)号：US07742172B2

公开(公告)日：2010-06-22

申请号：US10528197

申请日：2003-09-18

申请人： Julian A. Cluff ,  Michael J. Withers ,  Ian V. Bradley

发明人： Julian A. Cluff ,  Michael J. Withers ,  Ian V. Bradley

IPC分类号： G01B9/02 ,  G01J3/45 ,  G02B26/08 ,  G02B26/10 ,  G02B26/12

CPC分类号： G02B26/06 ,  G01N21/3581

摘要： An apparatus for varying the path length of a beam of radiation, the apparatus comprising: an element (51) rotatably mounted about an axis, said element comprising two reflective surfaces in fixed relation to one another such that radiation may be reflected between said reflective surfaces and out of the element (51); and driving means (55) for rotatably oscillating said element about said axis.

摘要翻译： 一种用于改变辐射束的路径长度的装置，所述装置包括：围绕轴线可旋转地安装的元件（51），所述元件包括彼此固定的两个反射表面，使得辐射可以在所述反射表面 并从元素（51）出来; 以及用于围绕所述轴线可旋转地摆动所述元件的驱动装置（55）。

公开(公告)号：US08665423B2

公开(公告)日：2014-03-04

申请号：US10569374

申请日：2004-08-27

申请人： Michael J. Withers ,  Bryan E. Cole

发明人： Michael J. Withers ,  Bryan E. Cole

IPC分类号： G01J3/00

CPC分类号： G01N21/9508 ,  G01N21/3581 ,  G01N21/49

摘要： Method and apparatus for investigating a sample particularly a pharmaceutical tablet. An emitter and/or the sample are initially positioned so that the emitter is at a predetermined distance and normal angle to a first point on a surface of the sample. The emitter then irradiates the sample with radiation having a plurality of frequencies in the range from 25 GHz to 100 THz at a plurality of points on the surface of the sample. Relative motion is possible between the emitter and the sample so that the surface of the sample can be tracked to maintain the predetermined distance and normal angle at each of the plurality of points, and allow radiation transmitted and/or reflected from the sample at the plurality of points to be detected. This has particular application to imaging the structure or composition of a coating on a pharmaceutical tablet.

摘要翻译： 用于研究样品的方法和装置，特别是药物片剂。 发射器和/或样品最初被定位成使得发射体与样品表面上的第一点处于预定距离和法线的角度。 然后，发射体在样品表面上的多个点处以25GHz至100THz的多个频率的辐射照射样品。 可以在发射体和样本之间进行相对运动，使得可以跟踪样品的表面以在多个点中的每一个处保持预定距离和法线角度，并且允许在多个点处从样品发射和/或反射的辐射 要检测的点。 这具有用于成像药物片剂上的涂层的结构或组成的特殊应用。

公开(公告)号：US4707702A

公开(公告)日：1987-11-17

申请号：US818546

申请日：1986-01-13

申请人： Michael J. Withers

发明人： Michael J. Withers

IPC分类号： H01P1/17 ,  H01Q13/02 ,  H01Q19/00

CPC分类号： H01P1/173 ,  H01Q13/0241

摘要： A circularly polarizing antenna feed comprises a feed waveguide having a short circuit reflecting plate at one end and a radiating horn at the other, a wave exciter for launching linearly polarized plane waves axially along the feed waveguide in opposite directions, and a grid of parallel reflector strips disposed in a plane which is perpendicular to the waveguide axis and which is located between the wave exciter and the reflecting termination at a distance of approximately .lambda.g/8 from the exciter and approximately .lambda.g/4 from the termination. The reflecting strips of the grid are inclined at an angle of 45.degree. to the direction of polarization of the waves propagated by the exciter, the grid and the reflecting termination together forming a twist reflector which effectively reflects and rotates through 90.degree. the waves incident upon the grid. These reflected waves together with the forwardly propagated waves from the exciter represent circularly polarized waves. As an alternative to the reflector grid the feed may comprise a metal septum plate which has an axial length of .lambda.g/4 and which is disposed in the waveguide in an axial plane inclined at 45.degree. to the polarization direction of waves propagated by the exciter and so that its front edge is located .lambda.g/8 behind the exciter.

摘要翻译： 圆极化天线馈电包括：一端具有短路反射板的馈电波导，另一端具有辐射喇叭，用于在相反方向上沿馈电波导轴向发射线偏振平面波的波激励器，以及平行反射器的格栅 条带设置在垂直于波导轴线的平面中，并且位于波激励器和反射终端之间，距离激励器大约为λg / 8的距离处，并且距终端大约为λg / 4。 网格的反射条与激励器传播的波的极化方向倾斜45度，网格和反射端接在一起形成扭转反射器，有效地反射和旋转通过90°的波浪入射到 电网。 这些反射波与来自激励器的向前传播的波一起表示圆偏振波。 作为反射器格栅的替代物，进料可以包括具有λg / 4的轴向长度的金属隔板，并且其布置在波导中的与由激励器传播的波的偏振方向倾斜45°的轴向平面 并使其前缘位于激励器后面的λg / 8。