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    Low coherent interference fringe analysis method
    95.
    发明授权
    Low coherent interference fringe analysis method 有权

    公开(公告)号：US07119907B2

    公开(公告)日：2006-10-10

    申请号：US10446050

    申请日：2003-05-28

    Applicant: Zongtao Ge

    Inventor： Zongtao Ge

    IPC: G01B9/02

    CPC classification number: G01B9/02083 ,  G01B9/0201 ,  G01B9/0209

    Abstract: In a low coherent interference fringe analysis method, a light intensity distribution of interference fringes formed by object light and reference light in a sample is represented by a light intensity distribution function using an envelope function. Subsequently, phase shifting is carried out, so as to measure the light intensity at each shift stage. According to thus measured light intensities at respective shift stages, unknowns of the light intensity distribution function are computed. Then, according to the computed unknowns, a peak position of a curve of the envelope function is determined. According to thus determined peak position, phase information of the sample is determined.

    Scatterometry by phase sensitive reflectometer
    96.
    发明授权
    Scatterometry by phase sensitive reflectometer 有权
    相位敏感反射计的散射

    公开(公告)号：US07088451B2

    公开(公告)日：2006-08-08

    申请号：US11256764

    申请日：2005-10-24

    Applicant: Abdurrahman Sezginer

    Inventor： Abdurrahman Sezginer

    IPC: G01B9/02

    CPC classification number: G01B9/0201 ,  G01B9/02044 ,  G01B9/02069 ,  G01B9/02088 ,  G01B9/0209 ,  G01B11/0675 ,  G01B2210/56 ,  G01B2290/70 ,  G01J3/453

    Abstract: A phase-sensitive interferometric broadband reflectometer includes an illumination source for generating an optical beam. A beam splitter or other optical element splits the optical beam into probe beam and reference beam portions. The probe beam is reflected by a subject under test and then rejoined with the reference beam. The combination of the two beams creates an interference pattern that may be modulated by changing the length of the path traveled by the probe or reference beams. The combined beam is received and analyzed by a spectrometer.

    Abstract translation: 相敏干涉测量宽带反射计包括用于产生光束的照明源。 分束器或其他光学元件将光束分成探测光束和参考光束部分。 探测光束被被测物体反射，然后用参考光束重新连接。 两个光束的组合产生干涉图案，其可以通过改变由探针或参考光束行进的路径的长度来调制。 组合光束由光谱仪接收和分析。

    Method to suppress artifacts in frequency-domain optical coherence tomography
    97.
    发明申请
    Method to suppress artifacts in frequency-domain optical coherence tomography 有权
    抑制频域光学相干断层扫描中伪像的方法

    公开(公告)号：US20060171503A1

    公开(公告)日：2006-08-03

    申请号：US11334964

    申请日：2006-01-19

    Applicant: Keith O'Hara ,  Martin Hacker

    Inventor： Keith O'Hara ,  Martin Hacker

    IPC: H05G1/60

    CPC classification number: A61B5/0066 ,  A61B5/0073 ,  A61B5/7257 ,  G01B9/0201 ,  G01B9/02058 ,  G01B9/02078 ,  G01B9/02083 ,  G01B9/02091

    Abstract: One embodiment of the present invention is a method for suppressing artifacts in frequency-domain OCT images, which method includes (a) providing sample and reference paths with a significant difference in their chromatic dispersion (b) correcting for the effects of the mismatch in chromatic dispersion, for the purpose of making artifacts in the OCT image readily distinguishable from the desired image.

    Abstract translation: 本发明的一个实施例是一种用于抑制频域OCT图像中的伪影的方法，该方法包括（a）提供其色散中显着差异的样本和参考路径（b）校正色差中的不匹配的影响 分散体，用于使OCT图像中的人造物与期望的图像容易地区分开。

    Methods and apparatus for splitting, imaging, and measuring wavefronts in interferometry
    99.
    发明申请
    Methods and apparatus for splitting, imaging, and measuring wavefronts in interferometry 有权

    公开(公告)号：US20060132795A1

    公开(公告)日：2006-06-22

    申请号：US11349843

    申请日：2006-02-07

    Applicant: James Millerd ,  Neal Brock

    Inventor： James Millerd ,  Neal Brock

    IPC: G01B9/02

    CPC classification number: G01B11/2441 ,  G01B9/0201 ,  G01B9/02081 ,  G01B9/02087 ,  G01B2290/45 ,  G01B2290/70 ,  G01J9/02 ,  G01N21/45

    Abstract: Apparatus for splitting, imaging, and measuring wavefronts with a reference wavefront and an object wavefront. A wavefront-combining element receives and combines into a combined wavefront an object wavefront from an object and a reference wavefront. A wavefront-splitting element splits the combined wavefront into a plurality of sub-wavefronts in such a way that each of the sub-wavefronts is substantially contiguous with at least one other sub-wavefront. The wavefront-splitting element may shift the relative phase between the reference wavefront and the object wavefront of the sub-wavefronts to yield a respective plurality of phase-shifted sub-wavefronts. The wavefront-splitting element may then interfering the reference and object wavefronts of the phase-shifted sub-wavefronts to yield a respective plurality of phase-shifted interferograms. An imaging element receives and images the phase-shifted interferograms. A computer connected to the imaging element measures various parameters of the objects based on the phase-shifted interferograms. Examples of measurements include flow parameters such as the concentrations of selected gaseous species, temperature distributions, particle and droplet distributions, density, and so on. In addition to flow parameters, the displacement (e.g., the vibration) and the profile of an object may be measured.

    Simple high efficiency optical coherence domain reflectometer design
    100.
    发明申请
    Simple high efficiency optical coherence domain reflectometer design 有权
    简单的高效光学相干域反射计设计

    公开(公告)号：US20050213103A1

    公开(公告)日：2005-09-29

    申请号：US10811748

    申请日：2004-03-29

    Applicant: Matthew Everett ,  Yan Zhou

    Inventor： Matthew Everett ,  Yan Zhou

    IPC: A61B5/00 ,  G01B9/02 ,  G01M11/00 ,  G01N21/47

    CPC classification number: G01M11/3181 ,  A61B5/0066 ,  A61B5/0084 ,  G01B9/0201 ,  G01B9/02044 ,  G01B9/02091 ,  G01B2290/40 ,  G01B2290/70 ,  G01N21/4795

    Abstract: The present invention discloses simple and yet highly efficient configurations of optical coherence domain reflectometry systems. The combined use of a polarizing beam splitter with one or two polarization manipulator(s) that rotate the returned light wave polarization to an orthogonal direction, enables one to achieve high optical power delivery efficiency as well as fixed or predetermined output polarization state of the interfering light waves reaching a detector or detector array, which is especially beneficial for spectral domain optical coherence tomography. In addition, the system can be made insensitive to polarization fading resulting from the birefringence change in the sample and reference arms. Dispersion matching can also be easily achieved between the sample and the reference arm for high resolution longitudinal scanning.

    Abstract translation: 本发明公开了光学相干畴反射系统的简单且高效的配置。 将偏振分束器与一个或两个偏振操纵器组合使用，其将返回的光波偏振旋转到正交方向，使得能够实现高的光功率传递效率以及干涉的固定或预定的输出偏振状态 光波到达检测器或检测器阵列，这对于光谱域光学相干断层扫描是特别有益的。 此外，该系统可以对由样品和参考臂中的双折射变化导致的偏振衰落不敏感。 也可以在样品和参考臂之间轻松实现色散匹配，实现高分辨率纵向扫描。

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