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    Apparatus for detection of optical wavefront polarization state
    103.
    发明公开
    Apparatus for detection of optical wavefront polarization state 失效
    Verfahren und Vorrichtung zur Feststellung des Polarisationszustands eines optischen Wellenzugs。

    公开(公告)号：EP0429219A2

    公开(公告)日：1991-05-29

    申请号：EP90312195.2

    申请日：1990-11-07

    Applicant: International Business Machines Corporation

    Inventor： Asthana, Rahul ,  Miller, Robert Dennis ,  Schellenberg, Franklin Mark ,  Sincerbox, Glenn Tavernia ,  Zavislan, James Matthew

    IPC: G11B11/10 ,  G11B13/04 ,  G11B7/12

    CPC classification number: G11B11/10543 ,  G01J4/00 ,  G11B11/10576

    Abstract: An improved apparatus and method for detecting the polarization state of an optical wavefront is disclosed, which is especially suitable for use in an integrated magneto-optic recording head. An optically transparent waveguide structure (10) transmits TE and TM modes of the wavefront propagated as a beam coupled into the waveguide by a TE/TM grating coupler (16). In the waveguide structure is a periodic structure (21) comprising a birefringent mode separator that splits the propagating beam into TE and TM modes. The mode separator comprises an array of uniformly spaced volumes of identical configuration. Photosensitive devices (13,14) detect the intensity of the light contained within each of the separated beams. The signals from these photosensitive devices are used to determine the state of polarization of the optical wavefront.
    The periodic structure may, if desired, comprise regions of alternating birefringence, such as a Bragg grating, either in a waveguide layer or a cladding layer. Focal power is introduced (1) by providing focal power in the input grating coupler to the waveguide with a curved grating structure, (2) by varying the pitch of the birefringent mode separator extending in a direction transverse to the optical axis of the propagating beam, or (3) by introducing a surface grating with a varying pitch in a direction transverse of the optical axis.

    Abstract translation: 公开了一种用于检测光学波前的偏振状态的改进的装置和方法，其特别适用于集成磁光记录头。 光学透明波导结构（10）传输波前的TE和TM模式，其作为通过TE / TM光栅耦合器（16）耦合到波导中的波束传播。 在波导结构中是包括将传播光束分解成TE和TM模式的双折射模式分离器的周期性结构（21）。 模式分离器包括具有相同构造的均匀间隔的体积的阵列。 感光装置（13,14）检测包含在每个分离光束内的光的强度。 来自这些感光装置的信号用于确定光波阵面的偏振状态。 如果需要，周期性结构可以包括交替的双折射区域，例如波导层或包层中的布拉格光栅。 引入焦点功率（1）通过在输入光栅耦合器中以弯曲光栅结构向波导提供焦点功率，（2）通过改变在横向于传播光束的光轴的方向上延伸的双折射模式分离器的间距 ，或（3）通过在横向于光轴的方向上引入具有变化间距的表面光栅。

    MESSANORDNUNG ZUR ANALYSE ELEKTROMAGNETISCHER STRAHLUNG
    105.
    发明公开
    MESSANORDNUNG ZUR ANALYSE ELEKTROMAGNETISCHER STRAHLUNG 失效
    测量器具，用于分析电磁辐射。

    公开(公告)号：EP0195039A1

    公开(公告)日：1986-09-24

    申请号：EP85904630.0

    申请日：1985-09-25

    Applicant: Distl, Richard ,  Schmidt, Ulrich

    Inventor： Distl, Richard ,  Schmidt, Ulrich

    IPC: G01J4 ,  G01N21

    CPC classification number: G01N21/21 ,  G01J4/00

    Abstract: L'arrangement de mesure pour l'analyse des rayonnements électromagnetiques comporte, dans le trajet des radiations, les ensembles suivants disposés les uns derrière les autres: (a) au moins un polarisateur (2); (b) au moins un élément optiquement actif (3) avec une activité optique connue, c'est-à-dire avec une dépendance en fréquence connue de la rotation du plan de rotation; et (c) au moins un analyseur (4), dont la direction de polarisation possède une orientation fixe et préréglée par rapport à la direction du polarisateur linéaire. Le faisceau provenant de l'analyseur (4) est amené à travers un capteur photosensible (7, 8) d'un circuit de mesure. L'intensité globale des radiations à mesure est déterminée en créant de plusieurs façons un signal de référence, notamment par une mesure directe avec un élément optiquement actif partiellement éloigné du trajet des radiations par le découplage d'un faisceau partiel ou par un analyseur séparateur de faisceau. L'arrangement de mesure permet une analyse très rapide (jusqu'à la mesure du temps d'étalonnage) du faisceau électromagnétique avec un pouvoir de résolution extrêmement élevé, sans qu'aucune pièce mécanique en mouvement ne soit nécessaire. Les domaines d'application de l'arrangement de mesure sont: la détermination du centre optique des radiations, la détermination de la caractéristique spectrale des radiations et aussi le contrôle spectrométrique et/ou photométrique des échantillons.

    Method of and device for realtime measurement of the state of polarization of a quasi-monochromatic light beam
    106.
    发明公开
    Method of and device for realtime measurement of the state of polarization of a quasi-monochromatic light beam 失效
    对于准单色光束的偏振状态的实时测量方法和装置。

    公开(公告)号：EP0172568A2

    公开(公告)日：1986-02-26

    申请号：EP85110477.8

    申请日：1985-08-21

    Applicant: CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.

    Inventor： Calvani, Riccardo ,  Cisternino, Francesco ,  Caponi, Renato

    IPC: G01J4/00 ,  G01J9/04

    CPC classification number: G01J4/00 ,  G01J9/04

    Abstract: The method and the device are based on interference techniques. Two quasi-monochromatic radiations (2a, 2b; 102a, 102b; 202a, 202b) with slightly different optical frequencies are generated. A radiation is converted into a 45° linearly-polarized radiation, while the other presents the polarization state imposed by a body under test (4, 204). In each radiation, horizontal and vertical polarization components are separated, and then recombined into two different beams (20a, 21a; 34, 35) comprising radiations at both frequencies, respectively polarized in the same plane. Beatings between the two components of each beam are originated and from the two electrical signals in the radio frequency range thus obtained the information is extracted on the relative phase and the amplitude of the two components of the radiation with polarization imposed by the body under test (4, 204).

    Abstract translation: 该方法和设备是基于干扰的技术。 两个准单色辐射（2A，2B; 102A，102B; 202A，202B）具有稍微不同的光频率被生成。 一种辐射被转换成一个45°线性偏振辐射，而其它呈现（204 4）下测试由本体所施加的偏振状态。 在每个辐射，水平和垂直偏振分量被分离，然后重新组合成两个不同的光束（20A，21A; 34，35）的频率，在同一平面上分别极化包含两种辐射。 每个梁的两个部件之间的殴打的起源，并从在无线电频率范围内的两个电信号由此获得的信息被提取上的相对相位和与偏振测试下由身体施加的辐射的两个分量的振幅（ 4，204）。

    STABILISATION SYSTEM FOR A LIGHT SOURCE
    107.
    发明公开
    STABILISATION SYSTEM FOR A LIGHT SOURCE 审中-公开
    光源稳定系统

    公开(公告)号：EP3225962A2

    公开(公告)日：2017-10-04

    申请号：EP17167609.1

    申请日：2014-10-29

    Applicant: University Court of The University of St Andrews

    Inventor： DHOLAKIA, Kishan ,  MAZILU, Michael ,  METZGER, Klaus

    IPC: G01J9/02 ,  G01J4/00 ,  G01J3/02 ,  H01S5/0687 ,  G01J1/42

    CPC classification number: G01J9/0246 ,  G01J1/4257 ,  G01J3/0205 ,  G01J4/00 ,  G01J2001/0481 ,  G01J2009/0257

    Abstract: A stabilisation system for stabilising an output of a controllable light or laser source comprises a randomizer for randomizing light from the controllable light or laser source to generate a speckle pattern; a detector for detecting the speckle pattern to determine one or more properties of the light and/or changes in one or more properties of the light; and a controller for controlling the controllable light or laser source based on the determined one or more properties of the light and/or changes in one or more properties of the light.

    Abstract translation: 用于稳定可控光源或激光源的输出的稳定系统包括：随机化器，用于随机化来自可控光源或激光源的光以产生散斑图案; 检测器，用于检测散斑图案以确定光的一个或多个属性和/或光的一个或多个属性的变化; 以及用于基于确定的光的一个或多个属性和/或光的一个或多个属性的变化来控制可控光源或激光源的控制器。

    POLARIZATION SCRAMBLING IN INTERFEROMETER SYSTEMS
    108.
    发明公开
    POLARIZATION SCRAMBLING IN INTERFEROMETER SYSTEMS 有权
    干涉仪系统中的极化扰动

    公开(公告)号：EP2929377A4

    公开(公告)日：2016-07-13

    申请号：EP13859792

    申请日：2013-11-01

    Applicant: BAKER HUGHES INC

    Inventor： CHILDERS BROOKS A ,  DUNCAN ROGER GLEN ,  BALAGOPAL AJIT ,  PROVENZANO DAN R

    IPC: G01V8/10 ,  G01D5/353 ,  G01N21/84 ,  G01N21/954

    CPC classification number: G01J4/00 ,  G01D5/35316 ,  G01D5/35393 ,  G01N21/954

    Abstract: A system and method to obtain and process interferometer output scans is described. The interferometer-based sensor system includes a tunable laser to transmit a transmit signal and a polarization scrambler to produce a polarization state change on the transmit signal. The system also includes an interferometer to provide an output scan based on the transmit signal with the polarization state change and a processor to process the output scan.

    Abstract translation: 描述了获得和处理干涉仪输出扫描的系统和方法。 基于干涉仪的传感器系统包括用于传输发射信号的可调谐激光器和偏振加扰器，以在发射信号上产生极化状态变化。 该系统还包括干涉仪，用于基于具有偏振态变化的发射信号和处理器来处理输出扫描来提供输出扫描。

    POLARIMETRIC CALIBRATION OF A REMOTE SENSOR
    109.
    发明公开
    POLARIMETRIC CALIBRATION OF A REMOTE SENSOR 审中-公开
    POLARIMETERIC校准远程传感器

    公开(公告)号：EP2888568A1

    公开(公告)日：2015-07-01

    申请号：EP13735116.9

    申请日：2013-06-19

    Applicant: Raytheon Company

    Inventor： SILNY, John F. ,  SCHILLER, Stephen J.

    IPC: G01J4/00

    CPC classification number: G01J4/00

    Abstract: Described are methods and systems for vicarious polarimetric calibration and performance validation of a remote sensor. The system includes a plurality of reflective mirrors configured and arranged to reflect radiation from a source of radiation onto the remote sensor with accurately known polarimetric properties. Each of the reflective mirrors are located so that the target images do not overlap. The remote sensor is configured to receive the radiation reflected from the plurality of reflective mirrors and store the received radiation as image data (e.g., the image of each mirror appears as a point target). The system includes a processor configured to process the received data to provide direct calibration and performance validation for each polarimetric or spectral channel of the remote sensor. In addition, the calibration method removes all atmospheric effects except for transmittance and provides reference targets that have high polarimetric contrast, full spectrum performance and easy to deploy.

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