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Embedded pupil function recovery for Fourier ptychographic microscopy.

Xiaoze Ou, Guoan Zheng, Changhuei Yang

    Optics Express
    |March 26, 2014
    PubMed
    Summary

    A new algorithm, embedded pupil function recovery (EPRY), integrated with Fourier ptychographic microscopy (FPM) simultaneously recovers sample spectra and imaging system pupil functions. This method reconstructs high-quality images without prior aberration knowledge, enhancing FPM flexibility.

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    Area of Science:

    • Optical microscopy
    • Image reconstruction
    • Computational imaging

    Background:

    • Fourier ptychographic microscopy (FPM) enables high-resolution imaging but typically requires prior knowledge of system aberrations.
    • Accurate characterization of imaging system pupil functions is crucial for reliable image reconstruction.

    Purpose of the Study:

    • To develop and validate an algorithm for simultaneous recovery of sample information and pupil functions within FPM.
    • To eliminate the need for a priori aberration knowledge in FPM for improved image quality and system characterization.

    Main Methods:

    • Development of the embedded pupil function recovery (EPRY) algorithm.
    • Integration of EPRY with the FPM framework (EPRY-FPM).
    • Experimental validation using biological samples and analysis of retrieved pupil functions.

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    Main Results:

    • Simultaneous recovery of sample Fourier spectrum and pupil function achieved.
    • High-resolution, large field-of-view images reconstructed without prior aberration data.
    • Retrieved pupil functions demonstrated utility in studying spatially varying aberrations.

    Conclusions:

    • The EPRY-FPM algorithm offers enhanced flexibility for FPM applications.
    • This method provides a powerful tool for characterizing imaging system aberrations.
    • The algorithm advances the capabilities of lensless imaging techniques.