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Coherent amplitude modulation imaging based on partially saturated diffraction pattern.

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    Area of Science:

    • Optics and Photonics
    • Computational Imaging

    Background:

    • Phase retrieval is crucial for reconstructing wavefronts.
    • Limited detector dynamic range poses a significant challenge in phase retrieval.

    Purpose of the Study:

    • To propose a single-shot phase retrieval algorithm overcoming detector dynamic range limitations.
    • To utilize a random aperture and partially saturated diffraction patterns for improved phase retrieval.

    Main Methods:

    • Development of a single-shot phase retrieval algorithm.
    • Incorporation of a random aperture for simplified manufacturing and direct use of design values.
    • Iterative processing of partially saturated diffraction patterns to retrieve information from saturated areas.

    Main Results:

    • Successfully retrieved diffraction patterns from saturated areas, circumventing detector dynamic range issues.
    • Demonstrated the algorithm's validity through both simulations and experimental validation.
    • Showcased the potential for wavelength adaptability without extra transmission measurements.

    Conclusions:

    • The proposed algorithm effectively addresses the challenge of limited detector dynamic range in phase retrieval.
    • The use of a random aperture offers practical advantages in manufacturing and iterative process initiation.
    • The method shows promise for versatile applications across different wavelengths.