中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

19 records (took 0.009 seconds)

    CIRCULAR BIREFRINGENCE REFRACTOMETER: METHOD AND APPARATUS FOR MEASURING OPTICAL ACTIVITY
    13.
    发明公开
    CIRCULAR BIREFRINGENCE REFRACTOMETER: METHOD AND APPARATUS FOR MEASURING OPTICAL ACTIVITY 审中-公开
    折射计用于测量圆双折射：方法和设备测量光学活动

    公开(公告)号：EP2041537A2

    公开(公告)日：2009-04-01

    申请号：EP07799089.3

    申请日：2007-06-27

    Applicant: President and Fellows of Harvard College

    Inventor： PEER, Fischer ,  GHOSH, Ambarish

    IPC: G01J4/02

    CPC classification number: G01J4/02 ,  G01N21/23

    Abstract: A system and method for detection and measurement of circular birefringences in materials, such as optically active (chiral) liquids and materials that exhibit the Faraday effect. The method and apparatus permit the detection of optical activities via the difference in the directions of propagation the left- and the right- circularly polarized light (components). A beam of light is directed at an interface formed by the optically active medium and another medium such that a difference in the angles of refraction and/or reflection and/or diffraction between the left- and the right-circularly polarized components of the light beam can be detected. The difference in the propagation directions between the two circularly polarized light components is measured on a position sensitive detector and/or is detected as an intensity difference. The circular birefringence in isotropic liquids is a measure of their optical purity (enantiomeric excess) and hence the invention presents a method and apparatus to measure chirality. The invention is thus related to optical rotation (polarimetric) measurements, but has the advantage that it does not depend on path-length traversed through the sample.

    OPTICAL SPECTRUM ANALYZER
    14.
    发明公开
    OPTICAL SPECTRUM ANALYZER 有权
    光谱分析仪

    公开(公告)号：EP1252489A2

    公开(公告)日：2002-10-30

    申请号：EP01900347.4

    申请日：2001-01-04

    Applicant: EXFO ELECTRO-OPTICAL ENGINEERING INC.

    Inventor： HE, Gang ,  GARIEPY, Daniel ,  SCHINN, Gregory, Walter

    IPC: G01J3/12 ,  G01J4/02 ,  G01J3/447

    CPC classification number: G01J3/12 ,  G01J3/447 ,  G01J4/02

    Abstract: An optical spectrum analyzer comprises a diffraction grating (DG), a polarization decomposing unit (PDM) for decomposing the input light beam into first and second light beams having mutually-perpendicular linear states of polarization, and two output ports (FP2/1, FP2/2) each for receiving from the grating, substantially exclusively, a respective one of the polarized light beams (LT, LR) after diffraction by the diffraction grating (DG). Each of the linearly-polarized light beams is directed onto the diffraction grating with its linear state of polarization at any prescribed angle to a corresponding plane of diffraction of the diffraction grating. The arrangement is such that the state of polarization of the light beams, at any particular wavelength within an operating band of the analyzer remains substantially unchanged with respect to time. The analyzer also may have a reflector (RAM) for reflecting the light beams leaving the diffraction grating after diffraction a first time so as to return them to the diffraction grating for diffraction a second time.

    Imaging polarimeter sensor with achromatic beam-splitting polarizer
    19.
    发明公开
    Imaging polarimeter sensor with achromatic beam-splitting polarizer 有权
    Polarimetrischer Bildsensor mit achromatischem Polarisationsstrahlteiler

    公开(公告)号：EP1519170A1

    公开(公告)日：2005-03-30

    申请号：EP04255760.3

    申请日：2004-09-22

    Applicant: Raytheon Company

    Inventor： Chen, Chungte W. ,  Ansley, David A

    IPC: G01J4/02

    CPC classification number: G01J4/02

    Abstract: An imaging polarimeter sensor (20) includes an achromatic beamsplitting polarizer (30) that receives a polychromatic image beam (22) of a scene (24) and simultaneously produces a first polarized polychromatic image beam (32) and a second polarized polychromatic image beam (34). The second polarized polychromatic image beam (34) is of a different polarization than the first polarized polychromatic image beam (32) and is angularly separated from the first polarized polychromatic image beam (32). The achromatic beamsplitting polarizer (30) preferably includes a Wollaston prism (50) through which the polychromatic image beam (22) passes, and at least one grating (54, 56) through which the polychromatic image beam (22) passes either before or after it passes through the Wollaston prism (50). An imaging detector (38) receives the first polarized polychromatic image beam (32) and the second polarized polychromatic image beam (34) and produces an output image signal (40) responsive to the first polarized polychromatic image beam (32) and the second polarized polychromatic image beam (34).

    Abstract translation: 成像旋光仪传感器（20）包括接收场景（24）的多色图像束（22）的同时产生第一偏振多色图像束（32）和第二偏振多色图像束（32）的消色差分束偏振器（30） 34）。 第二偏振多色图像束（34）具有与第一偏振多色图像束（32）不同的偏振，并且与第一偏振多色图像束（32）成角度地分离。 消色差分束偏振器（30）优选地包括多色图像束（22）通过的渥拉斯顿棱镜（50），以及至少一个光栅（54,56），多色图像束（22）在其之前或之后经过 它穿过渥拉斯顿棱镜（50）。 成像检测器（38）接收第一偏振多色图像束（32）和第二偏振多色图像束（34），并产生响应于第一偏振多色图像束（32）和第二偏振 多色图像束（34）。

Patent Agency Ranking