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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

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres

Published on: December 1, 2014

HyDRa: polishing with a vortex.

Erika Sohn, Elfego Ruiz, Luis Salas

|October 3, 2013

Summary

This summary is machine-generated.

A new hydrodynamic, deterministic polishing tool (HyDRa) uses pressurized air for a radial abrasive pattern. This method balances forces, minimizing microroughness for high-quality surface finishing.

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Generation and Long-term Maintenance of Nerve-free Hydra

Generation and Long-term Maintenance of Nerve-free Hydra

Published on: July 7, 2017

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Last Updated: May 7, 2026

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres

Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres

Published on: December 1, 2014

Generation and Long-term Maintenance of Nerve-free Hydra

Generation and Long-term Maintenance of Nerve-free Hydra

Published on: July 7, 2017

Area of Science:

Optics and Surface Metrology
Mechanical Engineering

Background:

Traditional fluid-jet polishing (FJP) methods can exert net forces on surfaces.
Achieving ultra-smooth surfaces requires minimizing tool-surface interaction forces.

Purpose of the Study:

To introduce a novel hydrodynamic, deterministic polishing tool (HyDRa).
To demonstrate the capability of HyDRa for high-quality surface finishing.

Main Methods:

Development of a polishing tool (HyDRa) utilizing the fluid-jet polishing (FJP) principle.
Acceleration of polishing flux with pressurized air for high-velocity expulsion.
Generation of a radial, grazing abrasive pattern.
Balancing of vacuum and thrust forces at the tool's output.

Main Results:

The HyDRa tool creates a radial, grazing abrasive pattern.
Net force on the polished surface is eliminated due to balanced forces.
Significant minimization of microroughness was achieved.
Successful polishing of small etalon plates was demonstrated.

Conclusions:

The hydrodynamic, deterministic polishing tool (HyDRa) offers a non-contact polishing solution.
The balanced force mechanism effectively minimizes microroughness.
HyDRa is suitable for finishing high-quality optical surfaces.