Optical polishing is a special form of polishing.
The work pieces are usually polished on foil or pitch. A polishing liquid, for example water with added cerium oxide, is used. This liquid flows in large quantities on the foil / pitch wheel and is circulated through filters and a mixing tank. The material removal rate is very low and the processing time is usually several hours. To minimize this time, the parts are lapped and / or polished on a conventional machine prior to optical polishing.
The achieved flatness and roughness results in optical polishing are in the nanoscale.
Optical polishing of 4 different work pieces
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