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    • 4. 发明申请
    • AUTOMATIC CALIBRATION OF FOURIER-DOMAIN OPTICAL COHERENCE TOMOGRAPHY SYSTEMS
    • FOURIER-DOMAIN光学相干系统的自动校准
    • WO2012018832A3
    • 2012-05-24
    • PCT/US2011046290
    • 2011-08-02
    • UNIV JOHNS HOPKINSKANG JINBALICKI MARCIN ARKADIUSZLIU XUAN
    • KANG JINBALICKI MARCIN ARKADIUSZLIU XUAN
    • A61B17/94G01B9/02G06F19/00
    • G01B9/02091G01B9/02044G01B9/02074G01N21/4795
    • A method for calibrating a Fourier domain optical coherence tomography system includes receiving spectral data from an optical detector comprising a linear array of detector elements, each detector element having a position labeled n, wherein detected light was wavelength-dispersed across the linear array of detector elements; determining parameters of a preselected functional relationship between wave number, kn, corresponding to detector element n as a function of optical detector element n based on the spectral data; further receiving subsequent spectral data subsequent to the first-mentioned receiving, wherein detected light was wavelength-dispersed across the linear array of detector elements; converting the subsequent spectral data using the preselected functional relationship between wave number kn and optical detector element n to obtain converted spectral data; and performing an inverse Fourier transform of the converted spectral data to obtain a depth profile.
    • 用于校准傅立叶域光学相干断层摄影系统的方法包括从包括检测器元件的线性阵列的光学检测器接收光谱数据,每个检测器元件具有标记为n的位置,其中检测到的光被波长分散在检测器元件的线性阵列 ; 基于光谱数据确定与检测器元件n对应的波数kn的预选函数关系的参数作为光学检测器元件n的函数; 进一步接收在所述第一次接收之后的随后的光谱数据,其中检测的光被波长分散在检测器元件的线性阵列上; 使用波数kn和光检测器元件n之间的预选功能关系来转换随后的光谱数据,以获得转换的光谱数据; 并对所转换的光谱数据执行逆傅立叶变换以获得深度分布。
    • 9. 发明授权
    • Compensation for effects of beam misalignments in interferometer metrology systems
    • 干涉仪计量系统中光束不对准效应的补偿
    • US07327465B2
    • 2008-02-05
    • US11250116
    • 2005-10-13
    • Henry A. Hill
    • Henry A. Hill
    • G01B11/02
    • G01B9/02018G01B9/02007G01B9/02019G01B9/02059G01B9/02074G01B9/02098G01B2290/70G03F7/70516G03F7/70775
    • In general, in a first aspect, the invention features methods that include deriving a first beam and a second beam from an input beam and directing the first and second beams along different paths, where the path of the first beam contacts a measurement object, producing an output beam comprising a phase related to an optical path difference between the different beam paths, determining a position of the measurement object with respect to at least one degree of freedom based on information derived from the output beam, monitoring variations in a direction of the input beam, and using the monitored variations in the direction of the input beam to reduce errors in the determined position associated with deviations of the path of the input beam from a nominal input beam path.
    • 通常,在第一方面,本发明的特征在于,方法包括从输入光束导出第一光束和第二光束,并将第一和第二光束沿着不同的路径引导,其中第一光束的路径接触测量对象,产生 输出光束,其包括与不同光束路径之间的光程差有关的相位,基于从输出光束导出的信息确定测量对象相对于至少一个自由度的位置,监测所述测量对象的方向上的变化 并且使用在输入光束的方向上监视的变化来减少与输入光束与标称输入光束路径的路径的偏差相关联的确定位置中的误差。
    • 10. 发明授权
    • Method for self-calibrated sub-aperture stitching for surface figure measurement
    • 用于表面图形测量的自校准子孔缝合方法
    • US06956657B2
    • 2005-10-18
    • US10303236
    • 2002-11-25
    • Donald GoliniGreg ForbesPaul Murphy
    • Donald GoliniGreg ForbesPaul Murphy
    • G01B11/24G01B9/02G01B11/255G01J9/00G01M11/00G01M11/02G01N21/84
    • G01M11/0271G01B9/02074G01B9/02085G01B11/255G01B2210/52G01B2290/65G01M11/0264
    • A method for accurately synthesizing a full-aperture data map from a series of overlapped sub-aperture data maps. In addition to conventional alignment uncertainties, a generalized compensation framework corrects a variety of errors, including compensators that are independent in each sub-aperture. Another class of compensators (interlocked) include coefficients that are the same across all the sub-apertures. A constrained least-squares optimization routine maximizes data consistency in sub-aperture overlap regions. The stitching algorithm includes constraints representative of the accuracies of the hardware to ensure that the results are within meaningful bounds. The constraints also enable the computation of estimates of uncertainties in the final results. The method therefore automatically calibrates the system, provides a full-aperture surface map, and an estimate of residual uncertainties. Therefore, larger surfaces can be tested with greater departures from a best-fit sphere to greater accuracy than was possible in the prior art.
    • 一种用于从一系列重叠子孔径数据图精确地合成全孔径数据图的方法。 除了传统的对准不确定性之外,广义补偿框架可以纠正各种错误,包括在每个子孔径中独立的补偿器。 另一类补偿器(互锁)包括在所有子孔径上相同的系数。 受限最小二乘优化程序使子孔重叠区域的数据一致性最大化。 拼接算法包括代表硬件准确性的约束,以确保结果在有意义的界限之内。 这些约束也使计算最终结果中不确定性的估计值。 因此,该方法可以自动校准系统,提供全孔径曲面图和剩余不确定度估计值。 因此,与现有技术相比,更大的表面可以与最佳拟合球体的更大偏离更大的精度进行测试。