Apparatus and method for production of single element toric lenses of very small proportions
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United States of America Patent
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Sep 5, 1989
Issued Date -
N/A
app pub date -
Sep 22, 1988
filing date -
Jan 28, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for generating toric optical surfaces having two different radii (or axes) of curvature with accurate centration. A multiplicity of such surfaces for use as lenses are simultaneously created. Each surface is mounted transversely to the periphery of a spinning disk of a radius equal to one of the desired arcs. Generating, lapping and polishing tools are rotated about an axis perpendicular to the disk's axis but displaced from the disk's axis by an amount equal to the difference between the radii of the desired arcs.
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