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Adaptive system correction for robust Fourier ptychographic imaging.

Zichao Bian, Siyuan Dong, Guoan Zheng

    Optics Express
    |February 12, 2014
    PubMed
    Summary

    Fourier ptychography (FP) imaging overcomes resolution limits. This study introduces adaptive system correction to mitigate noise from LED intensity fluctuations and optical aberrations, enhancing FP imaging robustness and effectiveness.

    Area of Science:

    • Microscopy and Imaging Technologies
    • Optical Physics
    • Computational Imaging

    Background:

    • Fourier ptychography (FP) offers super-resolution imaging beyond optical limits.
    • Systematic noise from LED intensity fluctuations and optical aberrations degrades FP reconstruction quality.
    • Current FP methods face limitations due to uncorrected system imperfections.

    Purpose of the Study:

    • To develop and demonstrate an adaptive system correction procedure for Fourier ptychography.
    • To improve the robustness and resolution of FP imaging by addressing noise sources.
    • To compensate for unknown system parameters and optical aberrations.

    Main Methods:

    • An iterative optimization procedure based on image-quality metric evaluation.
    • Adaptive estimation and correction of system uncertainties, including illumination intensity and pupil aberrations.

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  • Integration of phase retrieval techniques for system parameter recovery.

    • Main Results:

    • Successfully corrected for illumination intensity fluctuations in FP imaging.
    • Compensated for pupil aberrations of the employed optics.
    • Recovered several unknown system parameters, improving overall reconstruction fidelity.

    Conclusions:

    • The proposed adaptive correction scheme enhances Fourier ptychography robustness.
    • This method effectively mitigates noise and system uncertainties in FP imaging.
    • The technique holds potential for broader application in high-resolution optical imaging.