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US 11,890,712 B2Granted
Tool, device, and method for polishing lenses
AssigneeSchneider GmbH & Co. KG
InventorsGunter Schneider, Stephan Huttenhuis, Andreas Fedoseew, Nadine Geist
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Abstract
A tool, a device, and a method for zonal polishing of optical workpieces, wherein the tool has a preformed cap for forming a polishing surface, and the tool is placed against the workpiece that is to be polished in such a way that the tilt angle of the axis of rotation of the tool to the normal of the contact surface on the workpiece remains at least essentially constant and/or the size of the contact surface remains at least essentially constant.
Claims15
A method for polishing of a surface of an optical workpiece, comprising:
- swiveling or advancing a tool with a curved polishing surface relative to the workpiece, so that a contact portion of the polishing surface of the tool is pressed partially against the workpiece to be polished,
- moving the tool over a full diameter of the surface to be polished and through a center of the surface to be polished,
- rotating the workpiece,
- increasing a rotational speed of the workpiece when the tool is moved towards the center of the surface and decreasing the rotational speed of the workpiece when the tool is moved away from the center, and
- rotating the tool at a constant rotational speed which is faster than a maximum rotational speed of the workpiece,
- wherein the moving of the tool across the diameter of the surface combined together with the rotating of the workpiece results in the contact portion traversing a spiral polishing path.
3 more elements
Dependencies are inferred from the claim text.