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    We developed a novel microlens array with adjustable curvature using femtosecond laser technology. This innovation enhances optical system performance, particularly for field curvature correction and 3D imaging.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Laser Technology

    Background:

    • Traditional microlens arrays often lack adaptability in optical performance.
    • Field curvature and limitations in real-time 3D imaging necessitate advanced optical solutions.
    • Femtosecond laser direct writing offers high precision for micro-optics fabrication.

    Purpose of the Study:

    • To introduce a novel microlens array with different curvature unit lenses (MLADC).
    • To demonstrate the unique imaging and focusing capabilities of the MLADC.
    • To validate experimental findings with simulation results.

    Main Methods:

    • Fabrication of MLADC using femtosecond laser direct writing technology.
    • Design of hexagonal hyperboloid unit microlenses with varying heights and curvatures.
    • Experimental demonstration of imaging and focusing.
    • Finite element method (FEM) for simulation and analysis.

    Main Results:

    • Successful fabrication of MLADC with distinct unit lens curvatures.
    • Demonstrated unique optical performance in imaging and focusing.
    • Confirmed the ability to adjust the image plane curvature.
    • Experimental results showed good agreement with FEM-based simulations.

    Conclusions:

    • The novel MLADC exhibits unique optical properties due to its variable unit lens curvatures.
    • This technology enables adjustable image plane curvature, beneficial for optical system correction.
    • MLADC holds significant potential for applications in field curvature correction and real-time 3D imaging.