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Hybrid holographic modal wavefront sensing for improved aberration correction.

Anitta Jomy, Amritha Jayan, C S Narayanamurthy

    Optics Letters
    |June 13, 2025
    PubMed
    Summary

    We introduce a hybrid holographic modal wavefront sensing (HHMWS) technique. This method combines Zernike polynomials and polar Walsh functions for improved aberration correction, enhancing accuracy for complex wavefront distortions.

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    Area of Science:

    • Optical Engineering
    • Wavefront Sensing and Adaptive Optics

    Background:

    • Traditional Zernike-based modal wavefront sensing effectively corrects low-order aberrations.
    • Complex aberrations, such as those from atmospheric turbulence, pose challenges for Zernike-based methods.
    • Existing techniques often struggle with accuracy and real-time correction for diverse aberration types.

    Purpose of the Study:

    • To develop a hybrid holographic modal wavefront sensing (HHMWS) technique for enhanced aberration correction.
    • To integrate Zernike polynomials and polar Walsh functions for improved wavefront estimation accuracy.
    • To enable real-time correction of both low- and high-order aberrations.

    Main Methods:

    • A hybrid approach combining Zernike polynomials and polar Walsh functions is proposed.
    • Polar Walsh function-based correction is integrated sequentially with a feedback condition.
    • An experimental setup utilizing a single spatial light modulator (SLM) and camera is designed.

    Main Results:

    • The HHMWS technique demonstrates improved aberration correction capabilities.
    • Reduced crosstalk and enhanced real-time correction are achieved through the hybrid approach.
    • The method successfully corrects both low- and high-order aberrations with improved accuracy.

    Conclusions:

    • The proposed HHMWS technique offers a robust solution for accurate wavefront sensing and aberration correction.
    • This hybrid method leverages complementary strengths of different functions for superior performance.
    • The developed technique is suitable for applications requiring precise wavefront control, including adaptive optics.