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US 2013/0075577 A1Published application
Apparatus for formation of an opthalmic lens precursor and lens
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsMichael F. Widman, John B. Enns, P. Mark Powell, Peter W. Sites
Life of this patent
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Abstract
This invention discloses apparatus for generating an ophthalmic lens with at least a portion of one surface free-formed from a Reactive Mixture. In some embodiments, an ophthalmic lens is formed on a substrate with an arcuate optical quality surface via a source of actinic radiation controllable to cure a definable portion of a volume of Reactive Mixture.
Claims14
An apparatus for processing an ophthalmic Lens Precursor, the apparatus comprising:
- a substrate supporting the ophthalmic Lens Precursor;
- and
- a fluent material removal device which can be positioned to remove fluent material from the ophthalmic Lens Precursor supported by the substrate wherein the substrate includes an ophthalmic Lens Precursor Forming surface.
An apparatus for forming an ophthalmic lens based upon a Lens Precursor, the apparatus comprising:
- a light source capable of emitting actinic radiation;
- a homogenizer positioned to receive light from the light source and provide a more uniform intensity of light than the light received;
- a spatial light modulator reflecting at least a portion of the light provided by the homogenizer;
- a converging lens system converging light reflected by the spatial light modulator;
- a mold part comprising a lens forming surface transmissive of sufficient converging light reflected by the spatial light modulator to comprise actinic radiation;
- a vessel for containing reactive mixture around the lens forming surface in an amount in excess of an amount required to form the Lens Precursor;
- a material removal device operational to remove fluent reactive mixture;
- a dwelling location where the mold part can be positioned such that flowable chemical residue may flow across the near surface region of the Lens Precursor;
- and
- a source of fixing radiation sufficient to fix unreacted and partially reacted monomer comprising the Lens Precursor to form the ophthalmic lens based upon the Lens Precursor.
7 more elements
Dependencies are inferred from the claim text.