Method of grooving or counter-beveling the periphery of an ophthalmic lens
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United States of America Patent
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Jun 21, 2011
Grant Date -
Sep 27, 2007
app pub date -
May 12, 2005
filing date -
May 18, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A method for grooving or counter-beveling the periphery of an opthamalic lens in a grinding machine is provided. The grinding machine includes a lens support with a mechanism configured to rotate the lens about a first axis, a grooving or counter-beveling wheel rotatable about a second axis which can be tilted relative to the first axis, and a mechanism to adjust the angle of tilt of the second axis relative to the first axis. Initially, a profile for the groove is determined. A single treatment angle corresponding to the profile is calculated, and the angle of tilt of the second axis is adjusted to the value of the single treatment angle. A groove or counter-bevel is ground into the periphery of the lens with the angle of tilt remaining constant throughout the grinding.
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