New perspectives in hydrodynamic radial polishing techniques for optical surfaces

Elfego Ruiz; Erika Sohn; Esteban Luna; Luis Salas; Alberto Cordero; Jorge Gonzalez; Manuel Nunz; Javier Salinas; Irene Cruz-Gonzalez; Jorge Valdes; Victor Cabrera; Benjamin Martinez

doi:10.1117/12.550173

24 September 2004 New perspectives in hydrodynamic radial polishing techniques for optical surfaces

Elfego Ruiz, Erika Sohn, Esteban Luna, Luis Salas, Alberto Cordero, Jorge Gonzalez, Manuel Nunz, Javier Salinas, Irene Cruz-Gonzalez, Jorge Valdes, Victor Cabrera, Benjamin Martinez

Author Affiliations +

Proceedings Volume 5494, Optical Fabrication, Metrology, and Material Advancements for Telescopes; (2004) https://doi.org/10.1117/12.550173
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

In order to overcome classic polishing techniques, a novel hydrodynamic radial polishing tool (HyDRa) is presented; it is useful for the corrective lapping and fine polishing of diverse materials by means of a low-cost abrasive flux and a hydrostatic suspension system that avoids contact of the tool with the working surface. This tool enables the work on flat or curved surfaces of currently up to two and a half meters in diameter. It has the advantage of avoiding fallen edges during the polishing process as well as reducing tool wear out and deformation. The functioning principle is based on the generation of a high-velocity, high-pressure, abrasive emulsion flux with radial geometry. The polishing process is repeatable by means of the control of the tool operational parameters, achieving high degrees of precision and accuracy on optical and semiconductor surfaces, with removal rates of up to 9 mm³/hour and promising excellent surface polishing qualities. An additional advantage of this new tool is the possibility to perform interferometric measurements during the polishing process without the need of dismounting the working surface. A series of advantages of this method, numerical simulations and experimental results are described.

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Elfego Ruiz, Erika Sohn, Esteban Luna, Luis Salas, Alberto Cordero, Jorge Gonzalez, Manuel Nunz, Javier Salinas, Irene Cruz-Gonzalez, Jorge Valdes, Victor Cabrera, and Benjamin Martinez "New perspectives in hydrodynamic radial polishing techniques for optical surfaces", Proc. SPIE 5494, Optical Fabrication, Metrology, and Material Advancements for Telescopes, (24 September 2004); https://doi.org/10.1117/12.550173

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