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Simple phase retrieval method based on two intensity measurements on a single plane.

Junhe Zhou, Haoqian Pu

    Applied Optics
    |November 22, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel phase retrieval method using two intensity patterns captured on one plane. This technique simplifies phase recovery, benefiting systems utilizing spatial light modulators.

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    Area of Science:

    • Optics and Photonics
    • Computational Imaging
    • Wavefront Sensing

    Background:

    • Phase retrieval is crucial for reconstructing optical wavefronts.
    • Traditional methods often require measurements at multiple planes, complicating system design.
    • Spatial light modulators (SLMs) offer dynamic phase control but can introduce complexities in phase retrieval.

    Purpose of the Study:

    • To propose a simplified phase retrieval method.
    • To enable accurate phase recovery using intensity measurements from a single plane.
    • To facilitate phase retrieval in systems employing dynamic phase elements like SLMs.

    Main Methods:

    • Generating two intensity patterns with and without a lens on a single optical plane.
    • Utilizing rigorous theoretical derivations to establish Fourier transform relationships between the fields.
    • Applying a modified Gerchberg-Saxton algorithm for phase pattern recovery.

    Main Results:

    • Demonstrated that the two intensity patterns correspond to Fourier transform pairs.
    • Successfully recovered phase patterns using the modified Gerchberg-Saxton algorithm.
    • Validated the method's effectiveness through experimental implementation.

    Conclusions:

    • The proposed single-plane phase retrieval method is effective and simplifies the process.
    • This technique is particularly advantageous for systems with phase tuning elements like SLMs.
    • Offers a practical solution for phase reconstruction in dynamic optical systems.