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Related Experiment Video

Updated: May 7, 2026

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres
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HyDRa: control of parameters for deterministic polishing.

E Ruiz, L Salas, E Sohn

    Optics Express
    |October 10, 2013
    PubMed
    Summary

    Precise control of hydrodynamic polishing parameters is essential for achieving high-quality surfaces. This study demonstrates how the HyDRa system ensures stable parameter control for deterministic polishing of large optics.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Manufacturing Engineering

    Background:

    • Deterministic polishing is crucial for advanced optical surfaces.
    • Hydrodynamic polishing offers a non-contact method for achieving high precision.
    • Controlling polishing parameters is key to repeatable results.

    Purpose of the Study:

    • To describe the HyDRa polishing system.
    • To demonstrate precise control of key polishing parameters.
    • To illustrate the impact of parameter stability on surface quality.

    Main Methods:

    • Detailed description of the HyDRa polishing system.
    • Precise control and monitoring of propelling air pressure, slurry density, slurry flux, and tool height.
    • Application of the system to polish an 84 cm hyperbolic mirror.

    Main Results:

    • Achieved precise and deterministic control over polishing parameters.
    • Demonstrated stable parameter control crucial for high-quality surfaces.
    • Presented polishing results for a large-aperture hyperbolic mirror.

    Conclusions:

    • The HyDRa system enables deterministic control of hydrodynamic polishing.
    • Parameter stability is critical for achieving nanometer-level surface precision.
    • This method is suitable for polishing large, complex optical components.