公开(公告)号：US5305075A

公开(公告)日：1994-04-19

申请号：US12140

申请日：1993-01-29

申请人： Frank Bucholtz ,  Kee P. Koo ,  Dominique M. Dagenais

发明人： Frank Bucholtz ,  Kee P. Koo ,  Dominique M. Dagenais

IPC分类号： G01R33/032 ,  G01B9/02

CPC分类号： G01R33/0327

摘要： The fiber-optic magnetostrictive transducer system consists of a sensing element having three dual-strip fiber optic magnetostrictive transducers bonded into a single fiber Mach-Zehnder interferometer operating single mode mounted in a symmetrical orthogonal geometry. The dual-strip fiber optic magnetostrictive transducers have predictable and consistent reproducibility and are comprised of a pair of field annealed metallic glass strips bonded to a coil of optical fiber. This structure is in turn mounted on a bobbin structure where the fiber ribbon is attached to the bobbin only at the two ends of the bobbin. This reduces the possible loading of the transducer due to friction between the optical fiber and the surface of the mounting structure and at the same time provide a long sensing fiber in contact with the magnetostrictive element for high sensitivity. The symmetrical orthogonal arrangement of the transducers minimizes magnetic crosstalk and the strip form of the transducer elements maintain high directional sensitivity.

摘要翻译： 光纤磁致伸缩传感器系统由具有三个双带光纤磁致伸缩传感器的感测元件组成，该双重带状光纤磁致伸缩传感器结合到以单对称的正交几何形式安装的单模马赫 - 曾德干涉仪中。 双带光纤磁致伸缩传感器具有可预测和一致的重现性，并且包括一对结合到光纤线圈的场退火的金属玻璃带。 这种结构又安装在线轴结构上，其中纤维带仅在线轴的两端附接到线轴。 这减少了由于光纤与安装结构的表面之间的摩擦而导致的传感器的可能负荷，并且同时提供了与磁致伸缩元件接触的长的感测光纤以实现高灵敏度。 传感器的对称正交布置使磁串扰最小化，传感器元件的条形保持高方向灵敏度。

公开(公告)号：US6078706A

公开(公告)日：2000-06-20

申请号：US159566

申请日：1998-09-24

申请人： Gregory Nau ,  Dominique M. Dagenais ,  Frank Bucholtz

发明人： Gregory Nau ,  Dominique M. Dagenais ,  Frank Bucholtz

IPC分类号： A61B5/0452 ,  A61B5/0402 ,  A61B5/0456 ,  A61N1/365 ,  A61N1/37 ,  G01B9/02 ,  G01D5/353 ,  G06F9/38

CPC分类号： G01B9/02044 ,  G01B9/02023 ,  G01B9/02067 ,  G01B9/02074 ,  G01B9/0209 ,  G01D5/35303 ,  G01B2290/25

摘要： This invention is a quasi-static fiber pressure sensor using self-referenced interferometry based on a broadband semiconductor source which probes the pressure plate deflection within a Fabry-Perot cavity where phase is demodulated with a dual grating spectrometer providing real-time, high resolution remote measurement of pressure using optical interrogation of a deflecting pressure plate. This technique yields absolute gap measurement in real time over a wide range of gap lengths with nanometer resolution. By tailoring the pressure plate design to cover the range of gaps and deflection that can be resolved, pressure sensing with psi resolution can be obtained in a kpsig pressure range.

摘要翻译： 本发明是使用基于宽带半导体源的自参考干涉测量的准静态光纤压力传感器，其在Fabry-Perot腔室内探测压力板偏转，其中相位用双光栅光谱仪解调，提供实时，高分辨率的远程 使用光学询问偏转压力板测量压力。 该技术在纳米分辨率的宽范围的间隙长度内实时产生绝对间隙测量。 通过调整压板设计以覆盖可以解决的间隙和偏转范围，可以在kpsig压力范围内获得psi分辨率的压力感测。

公开(公告)号：US4518232A

公开(公告)日：1985-05-21

申请号：US525868

申请日：1983-08-24

申请人： Dominique M. Dagenais

发明人： Dominique M. Dagenais

IPC分类号： B23K26/073 ,  G02B27/09 ,  G02B5/10

CPC分类号： G02B27/0927 ,  B23K26/073 ,  G02B27/09 ,  G02B27/0983

摘要： A method and apparatus for transforming an obscured beam into a uniform intensity pattern at the image plane of the apparatus are described. Apparatus for carrying out the invention comprises two on-axis optical elements which are designed for stigmatic imaging of an incoming obscured parallel laser beam. The first element, a paraboloid mirror, forms an imaginary stigmatic image of the beam at its focal point. The second element, a multi-faceted mirror, comprises identical flat facets disposed on an ellipsoid envelope. The ellipsoid conjugates the focal point of the paraboloid and the image plane. Selection of an image shape and dimension defines the shape and dimension of the facets. Each facet's contribution to the image is a full scale centered spot. The contribution of each facet add up to form a final uniform image. Slight variation of the image dimension, from facet to facet, allows a roll-off of the image and compensates for diffraction ripples by the edges of the facets.

摘要翻译： 描述了一种用于将遮蔽光束变换为设备图像平面处的均匀强度图案的方法和装置。 用于实施本发明的装置包括两个轴上光学元件，其被设计用于对输入的模糊平行激光束进行静态成像。 第一个元素，一个抛物面反射镜，在其焦点处形成了一个假想的眩光图像。 第二元件，多面镜，包括设置在椭圆形包络上的相同平面。 椭圆体将抛物面的焦点和图像平面共轭。 图像形状和尺寸的选择定义了刻面的形状和尺寸。 每个方面对形象的贡献是一个全面的中心点。 每个方面的贡献加起来形成最终的统一图像。 图像尺寸从面到面的微小变化允许图像滚降，并通过刻面的边缘补偿衍射波纹。