System for determining the optimal ground depth of an ophthalmic lens having a closed homeomorphic boundary
AssigneeIntelab Medical Systems, Inc.
InventorsLarry M. Headlund, Gary J. Marksteiner, Richard S. Sidell
Life of this patent
Estimating the term…
Abstract
The minimum edge thickness boundary of an ophthalmic lens is mathematically projected onto a plane containing a scaled image of the spectacle frame while the ground depth of the lens is dynamically varied to obtain circumscription with the image. Optimal tool settings are then determined which will result in a ground prescription lens having minimum overall thickness.
Claims4
A system for determining the optimal ground depth of an ophthalmic lens having a closed homeomorphic boundary, comprising:
- means for graphically projecting an orbit of the prescribed lens;
- means for superimposing a projection of a spectacle frame onto the graphical projection of said orbit;
- and
- means for dynamically adjusting said orbit to circumscribe the projection of said spectacle frame.
A method of determining the optimal ground depth of an ophthalmic lens having a closed homeomorphic boundary, comprising:
- graphically projecting an orbit of the prescribed lens;
- superimposing a projection of a spectacle frame onto the graphical projection of said orbit;
- and
- dynamically adjusting said orbit to circumscribe the projection of said spectacle frame.
Dependencies are inferred from the claim text.