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Related Experiment Video

Updated: Jun 7, 2025

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres
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Efficient full-aperture mirror polishing method with variable orbital radius in computer-controlled optical

Jianjie Zhou, Bo Li, Xinnan Li

    Optics Express
    |November 14, 2024
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel full-aperture mirror polishing method for astronomical optics. The reversed strategy enhances fabrication accuracy and efficiency by reducing computation and edge polishing errors.

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    Area of Science:

    • Optics and astronomical instrumentation
    • Materials science and engineering

    Background:

    • Astronomical optical systems demand high precision and efficiency in aspherical mirror fabrication.
    • Current methods face inefficiencies due to separate polishing strategies for inner and edge mirror regions.

    Purpose of the Study:

    • To propose a novel full-aperture mirror polishing method.
    • To improve fabrication accuracy and efficiency for aspherical mirrors.

    Main Methods:

    • A reversed polishing strategy integrating inner and edge region calculations.
    • Deconvolution and linear equations methods for dwell time calculation using space-variant tool influence functions.
    • A fused tool path enabling variable orbital radius for single-round polishing.

    Main Results:

    • Reduced computation cost and edge polishing errors.
    • Demonstrated rapid surface error convergence across the full aperture in simulations and experiments.
    • Successful application on Silicon Carbide (SiC) aspherical and large segmented mirrors.

    Conclusions:

    • The proposed method significantly enhances full-aperture fabrication accuracy and efficiency.
    • It offers a more effective approach to producing high-precision aspherical mirrors for astronomy.