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US 5,326,956 AGranted
Laser profiling of lens edge
AssigneeBausch & Lomb Incorporated
InventorJames G. Lunney
Life of this patent
Estimating the term…
Abstract
A method for forming a curved edge on a lens comprising the steps of providing an annular laser beam and irradiating a first peripheral region of the lens with the laser beam to remove a layer of lens material from the first peripheral region through ablative photodecomposition. Next, a second peripheral region of the lens is irradiated with the laser beam to remove a layer of lens material from the second peripheral region.
Claims8
A method for forming a curved edge on a lens comprising the steps of
- providing an annular laser beam, irradiating a first peripheral region of the lens with the laser beam for a first number of shots to remove a layer of lens material from the first peripheral region through ablative photodecomposition;
- altering the internal diameter of the annular laser beam to expose the second peripheral region of the lens;
- and
- irradiating a second peripheral region of the lens with the laser beam for a second number of laser shots to remove a layer of lens material from the second peripheral region, wherein said second number of laser shots is greater than said first number of laser shots.
1 more element
Dependencies are inferred from the claim text.