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157 条记录 (耗时 0.022 秒)

    Detection of missampled interferograms in frequency domain OCT with a k-clock
    3.
    发明授权
    Detection of missampled interferograms in frequency domain OCT with a k-clock 有权

    公开(公告)号：EP2899494B1

    公开(公告)日：2018-09-12

    申请号：EP14169770.6

    申请日：2014-05-26

    申请人： Kabushiki Kaisha Topcon

    发明人： Yuan, Zhijia ,  Wang, Zhenguo ,  Reisman, Charles A. ,  Chan, Kinpui

    IPC分类号： G01B9/02

    CPC分类号： G01B9/02075 ,  G01B9/02004 ,  G01B9/02069 ,  G01B9/0207 ,  G01B9/02091

    摘要： Optical coherence tomography light sources can be non-linear and attempts to linearize them can lead to asynchrony between the light source and A-line scans and missampling in the scans causing signal noise. Accordingly, a system and methods are provided herein to detect missampling by obtaining a plurality of interferograms; providing at least two wavenumber reference signals at different wavenumbers, wherein the wavenumber reference signals comprise attenuated or enhanced portions of each of the plurality of interferograms; aligning each of the plurality of interferograms according to one of the at least two wavenumber reference signals; and for each of the plurality of interferograms, identifying an interferogram as missampled if another of the at least two reference signals does not align with a corresponding reference signal in a statistically significant number of the plurality of interferograms. An optical element, for example, an optical notch, may be used to generate the reference signals.

    Detection of missampled interferograms in frequency domain OCT with a k-clock
    4.
    发明公开
    Detection of missampled interferograms in frequency domain OCT with a k-clock 有权
    在具有波数时钟的光频率范围相干断层扫描不正确取样干涉的检测

    公开(公告)号：EP2899494A1

    公开(公告)日：2015-07-29

    申请号：EP14169770.6

    申请日：2014-05-26

    申请人： Kabushiki Kaisha Topcon

    发明人： Yuan, Zhijia ,  Wang, Zhenguo ,  Reisman, Charles A. ,  Chan, Kinpui

    IPC分类号： G01B9/02

    CPC分类号： G01B9/02075 ,  G01B9/02004 ,  G01B9/02069 ,  G01B9/0207 ,  G01B9/02091

    摘要： Optical coherence tomography light sources can be non-linear and attempts to linearize them can lead to asynchrony between the light source and A-line scans and missampling in the scans causing signal noise. Accordingly, a system and methods are provided herein to detect missampling by obtaining a plurality of interferograms; providing at least two wavenumber reference signals at different wavenumbers, wherein the wavenumber reference signals comprise attenuated or enhanced portions of each of the plurality of interferograms; aligning each of the plurality of interferograms according to one of the at least two wavenumber reference signals; and for each of the plurality of interferograms, identifying an interferogram as missampled if another of the at least two reference signals does not align with a corresponding reference signal in a statistically significant number of the plurality of interferograms. An optical element, for example, an optical notch, may be used to generate the reference signals.

    摘要翻译： 光学相干断层扫描光源可以是非线性的，并且尝试线性它们可以导致光源和A线扫描，并在扫描引起信号噪声missampling之间的异步。 因此，提供了一个系统和方法，在通过获得干涉的多元化检测missampling; 在不同的波数提供至少两个波数参考信号，worin波数参考信号包括衰减或增强的每个干涉图的多个的部分; 对准各个干涉gemäß的多个到所述至少两个波数参考信号中的一个; 并且对于每个干涉图的多个，在干涉​​识别为missampled如果另一个所述至少两个参考信号的不与干涉图的多个有统计学显著数目的参考信号CORRESPONDING对齐。 一种光学元件，例如，光学豁口，可用于生成所述基准信号。

    Sample clock generator for optical tomographic imaging apparatus, and optical tomographic imaging apparatus
    6.
    发明公开
    Sample clock generator for optical tomographic imaging apparatus, and optical tomographic imaging apparatus 审中-公开
    Probentaktgeneratorfüroptische Tomografieabbildungsvorrichtung und optische Tomografieabbildungsvorrichtung

    公开(公告)号：EP2884224A1

    公开(公告)日：2015-06-17

    申请号：EP14306992.0

    申请日：2014-12-10

    申请人： Tomey Corporation

    发明人： Yamanari, Masahiro ,  Okamoto, Keiichiro

    IPC分类号： G01B9/02

    CPC分类号： H03K3/013 ,  A61B3/102 ,  G01B9/02004 ,  G01B9/02069 ,  G01B9/02091 ,  G02B27/10 ,  G02F1/21 ,  H01L31/02325 ,  H03K3/42

    摘要： A sample clock generator includes a first optical path and a second optical path through which input lights are guided, an optical phase shifter to shift a phase of the input light guided through the first optical path, an interference-light generating unit to combine a phase-shifted input light and the input light guided through the second optical path to thereby generate an interference light for sample clock, a splitting unit to split the interference light for sample clock into two split lights having different phases, one light receiving unit to at least receive one split light from among the two split lights having different phases, the other light receiving unit to at least receive the other split light, a signal generating unit to generate a sample clock signal based on signals outputted from the one light receiving unit and the other light receiving unit.

    摘要翻译： 采样时钟发生器包括第一光路和通过其被引导输入光的第二光路，用于移位通过第一光路引导的输入光的相位的光学移相器，干涉光产生单元，以组合相位 输入光通过第二光路引导，从而产生用于采样时钟的干涉光;分割单元，用于将采样时钟的干涉光分为具有​​不同相位的两个分光;至少一个光接收单元 从具有不同相位的两个分裂光中接收一个分离光，另一个光接收单元至少接收另一个分离光;信号产生单元，用于基于从一个光接收单元输出的信号和 其他光接收单元。