Machine for grinding of toric surfaces on optic lenses
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United States of America Patent
Stats
-
Mar 31, 1987
Grant Date -
N/A
app pub date -
Apr 24, 1985
filing date -
Apr 26, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A machine for grinding of toric surfaces on optic lenses. A holder is provided for a lens (L.sub.1) and is pivotally supported in a carriage of a compound support of two carriages. A swivel arm is secured to a pivot of a holder. The swivel arm is pivotal about a movable bearing. A holder for a grinding spindle with cup tool thereon is supported on the machine frame by means of a bearing ring. During a movement of the compound carriage, the workpiece holder moves due to the guiding of the swivel arm on a circular path, the radius of which determines the base curve of the torus surface. By supporting the weight of the holder through a compound support on the machine frame, bending stresses of the swivel arm are avoided, through which a high precision machining operation is achieved.
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Cited Art Landscape
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