Lens molding die and a producing method therefor
AssigneePENTAX Corporation
InventorToru Chiba
Life of this patent
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Abstract
A lens molding die for producing a lens, which comprises a base member made of a hard material and having one surface of a predetermined shape; and a resin-molded layer formed on the one surface of the base member and having a surface shape corresponding to a predetemined shape of a lens to be molded. The resin-molded surface is to be made of a resin material which is inactive with a material which is to be molded by the lens molding die. The resin-molded layer is formed by introducing the material into the space formed between the one surface of the base member and a transfer surface formed on a transfer die correspondingly to the surface of a lens to be produced to be cured by heat or ultraviolet rays.
Claims14
A method for producing a lens molding die, comprising:
- preparing a base member made of a hard material and having one surface of a predetermined shape;
- and
- forming a resin-made surface layer on said one surface of the base member to have a surface shape corresponding to a predetermined shape of one surface of a lens to be produced.
The method for producing a lens molding die according to 3, wherein said material of the surface layer is a thermosetting resin material, and wherein said surface layer is formed by heating said material.
The method for producing a lens molding die according to 3, wherein said material of the surface layer is a ultraviolet-curable resin material, and said surface layer is formed by projecting ultraviolet rays thereon.
A method for producing a lens molding die, which comprises:
- preparing a base member made of a hard material and having one surface of a predetermined shape;
- preparing a transfer die made of a hard material and having a transfer surface of another predetermined shape;
- disposing said transfer die and said base member by facing said transfer surface of the transfer die to said one surface of the base member to form a predetermined space therebetween;
- introducing a resin-material into said predetermined space;
- and
- hardening said resin-material to form a molded resin layer on said one surface of the base member, said molding die comprising said base member and said molded resin layer.
The method for producing a lens molding die according to 8, wherein said material of the molded resin layer is a thermosetting resin material, and wherein said molded resin layer is formed by heating said material.
The method for producing a lens molding die according to 8, wherein said material of the molded resin layer is a ultraviolet-curable resin material, and said molded resin layer is formed by projecting ultraviolet rays thereon.
Dependencies are inferred from the claim text.