Method to manufacture a mold for lenses, and corresponding mold
AssigneeLeonardo Vision S.R.L.
InventorLeonardo Pesi
Life of this patent
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Abstract
The invention concerns a method to manufacture a mold (10) for forming contact lenses (100) using the technique of molding with molds of monomeric and/or polymeric material; such molds (10) comprise a male element (11) and a female element (12), which cooperate to define a cavity suitable to accommodate monomeric and/or polymeric material in the liquid state intended to form the lens (100), wherein the method provides to obtain, by means of laser processing, a plurality of grooves (23) in the male element (11) intended to form functional elements in relief (101) of the lenses (100). The invention also concerns a mold (10) for contact lenses (100) made of monomeric and/or polymeric material that can be obtained with the method as above.
Claims20
Method to manufacture a mold for forming contact lenses, comprising a male element and a female element, respectively with a convex surface and a concave surface, defining a cavity accommodating monomeric and/or polymeric material in the liquid state intended to form said lens, wherein said convex surface and said concave surface have at least two concentric zones, one internal and the other external, with radii of curvature different from each other and of wherein the method includes laser processing:
- in the external zone of said convex surface, a plurality of grooves having a shape and size mating with functional elements in relief to be made on the surface of said lenses,
- in the internal zone of said convex surface, a plurality of concave elements being of a shape mating with constructive elements in relief to be made on the surface of said lenses, wherein the concave elements are configured as blind holes or similar cavities.
Mold made of monomeric and/or polymeric material for forming contact lenses equipped with functional elements in relief, comprising a male element provided with a convex surface and a female element provided with a concave surface, cooperating to define a cavity accommodating monomeric and/or polymeric material in the liquid state intended to form the lens, said mold comprising said convex and concave surfaces each have at least an internal zone and an external zone, which are concentric and have different radii of curvature from each other, wherein said external zone of said convex surface comprises a plurality of grooves with a shape and size mating with said functional elements in relief to be made on the surface of said lenses, wherein said internal zone of said convex surface comprises a plurality of concave elements of a shape mating with constructive elements in relief to be made on the surface of said lenses, and wherein the concave elements are configured as blind holes or similar cavities.
Dependencies are inferred from the claim text.