Abrading – Precision device or process - or with condition responsive... – Condition responsive control for sandblasting
Reexamination Certificate
2007-01-30
2007-01-30
Nguyen, Dung Van (Department: 3723)
Abrading
Precision device or process - or with condition responsive...
Condition responsive control for sandblasting
C451S038000
Reexamination Certificate
active
11327786
ABSTRACT:
A polishing tool useful for grinding and high precision, fine polishing of flat or curved optical surfaces, as well as for the optical flattening of semiconductor and metallic surfaces. The tool does not make contact with the surface to be polished and lacks moving parts; but produces a high velocity flux “cushion” that expands radially and parallel to the working surface, generating a stable, uniform and repeatable annular abrasion footprint. Due to the hydrodynamic characteristics of the tool, it can create polished surfaces of high-precision optical quality starting from the grinding process up through the final fine polishing process without having to change the tool, thereby avoiding friction against the work surface and tool wear. It can polish thin membranes and does not require a rigid or active support for the working surface. This invention considerably simplifies optical polishing processes and reduces costs with respect to other known methods.
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Luna-Aguilar Esteban Antolin
Ruiz-Schneider Elfego Guillermo
Salas-Casales Luis
Sohn-Lopez-Forment Erika
Friedl Ryan
Hanscom Eric
Nguyen Dung Van
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