1. Articles from Zhike Peng

    1-3 of 3
    1. Anti-noise frequency estimation performance of Hanning-windowed energy centrobaric method for optical coherence velocimeter

      Anti-noise frequency estimation performance of Hanning-windowed energy centrobaric method for optical coherence velocimeter

      The Optical Coherence Velocimeter (OCV) technology is a technique for high-precision displacement and vibration measurement based on the principle of spectral domain optical coherence method. The key of this technology is to realize nanometer or even sub-nanometer measurement by high precision frequency estimation method called as Hanning-window energy centrobaric method (HnWECM). This paper analyses the error transmission process of HnWECM, and proposes a calculation method based on Paserval's theorem to establishes the accuracy theory of HnWECM. It shows that the variance of the estimated frequency using HnWECM is only proportional to the signal-to-noise ratio (SNR) and very close to ...

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    2. Full range line-field optical coherence tomography for high-accuracy measurements of optical lens

      Full range line-field optical coherence tomography for high-accuracy measurements of optical lens

      A full range line-field Fourier domain optical coherence tomography system (LF-FDOCT) with an accuracy at nanoscale was proposed for high-accuracy measurements of optical lens surface profile. The line-field surface curve information of optical lens could be obtained in one measurement which does not need point-by-point scanning used in traditional one-dimensional FDOCT system. The measurement accuracy of surface profile curve could be improved from micrometer scale to nanoscale by applying spectral centre correction method (SCCM) to the complex spectral interferogram. The corrected five phase shifting (CFPS) method was employed to eliminate the complexconjugate artifacts and the polychromatic error. Numerical simulation and ...

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    3. High-performance optical coherence velocimeter: theory and applications

      High-performance optical coherence velocimeter: theory and applications

      We proposed a high-performance optical coherence velocimeter (OCV) based on broadband optical interference which achieves spatial resolution from interference cancellation or enhancement of different components of the broadband light. There is a challengeable issue for OCV that the interference fringes become blurred when the velocity of detected object is relatively large, hindering the pace of OCV application in high-velocity field. To resolve this, the relationship between blurry coefficient and OCV system parameters (e.g., exposure time, central wavelength, bandwidth of source) was derived. It was found that blurry coefficient changed with oscillatory decay form and reached the minimum at each ...

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    1-3 of 3
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  2. Topics in the News

    1. (1 articles) Shanghai Jiao Tong University
    2. (1 articles) Universität Rostock
    3. (1 articles) Duke University
    4. (1 articles) L V Prasad Eye Institute
    5. (1 articles) VU University Amsterdam
    6. (1 articles) University of Leipzig
    7. (1 articles) Johannes F. de Boer
    8. (1 articles) Felipe A. Medeiros
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