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Total Internal Reflection Fluorescence Microscopy01:05

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Robust wavefront sensing method for reflective optical surfaces based on reference light modulation and total

Xie Li, Junkang Guo, Zhigang Liu

    Optics Express
    |August 13, 2025
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a new lens-free method for measuring reflective optical surfaces, improving efficiency and accuracy over traditional techniques. The extended coherent interferometry modulation imaging (ER-CIMI) algorithm enhances reflective surface topography measurement.

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    Area of Science:

    • Optics
    • Metrology
    • Surface Science

    Background:

    • Ptychographic coherent diffraction imaging is effective for reflective optical surface measurement.
    • Current methods suffer from high scanning overlap requirements, leading to inefficiency and complexity.

    Purpose of the Study:

    • To introduce a lens-free technique for efficient and accurate reflective surface topography measurement.
    • To overcome the limitations of existing ptychographic methods.

    Main Methods:

    • Developed the extended coherent interferometry modulation imaging (ER-CIMI) algorithm.
    • Utilized reference light coding, adjusting reference light phase, and amplitude constraints.
    • Implemented an optimized optical path design and a phase-recovery model with total variation regularization and sparse constraints.

    Main Results:

    • Demonstrated enhanced efficiency and accuracy in reflective surface topography measurement.
    • Validated the ER-CIMI algorithm through numerical simulations and experimental surface measurements.
    • Showcased improved noise robustness via advanced phase-recovery techniques.

    Conclusions:

    • The proposed lens-free ER-CIMI method offers a more efficient and accurate approach to measuring reflective optical surfaces.
    • The technique shows significant potential for high-precision optical surface and microstructure metrology.