Device for the fine machining of optically active surfaces on, in particular, spectacle lenses
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United States of America Patent
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Mar 22, 2016
Grant Date -
Dec 26, 2013
app pub date -
Mar 15, 2012
filing date -
Mar 17, 2011
priority date (Note) -
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Abstract
A device for the fine machining of optically active surfaces in particular spectacle lenses, has a spindle shaft which has a tool-holder portion and is mounted in a spindle housing such that it can rotate about a tool rotation axis. The device has an electric rotary drive with a rotor and a stator that rotates the spindle shaft operatively connected to the rotor about the tool rotation axis. The tool-holder portion can be displaced axially in the direction of the tool rotation axis. The rotor and the stator parts are axially guided in a guide tube along the tool rotation axis. The spindle shaft is in the form of a hollow shaft, via which the tool-holder portion, which is configured to hold a membrane chuck, can be subjected to a fluid.
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