METHOD OF MANUFACTURING MULTIFOCAL LENS AND MULTIFOCAL LENS
First Claim
1. A multifocal lens comprising a group including M layered lenses,wherein M-kinds (M is an integer of two or more) of lens materials having glass deformation point temperatures of At1, At2, . . . , AtM, are used and diluted by a heat press method,wherein a contact surface of an N−
- 1th lens (N is an arbitrary integer of two or more and M or less) contacted with an Nth lens is a concave face, a contact surface of the Nth lens contacted with the N−
1th lens is a convex face, andwherein the glass deformation point temperatures have a relation of AtN-1>
AtN.
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Accused Products
Abstract
A multifocal lens includes a group including M layered lenses. M-kinds (M is an integer of two or more) of lens materials having glass deformation point temperatures of At1, At2, . . . , AtM, are used and diluted by a heat press method. A contact surface of an N−1th lens (N is an arbitrary integer of two or more and M or less) contacted with an Nth lens is a concave face, a contact surface of the Nth lens contacted with the N−1th lens is a convex face. The glass deformation point temperatures have a relation of AtN-1>AtN.
57 Citations
14 Claims
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1. A multifocal lens comprising a group including M layered lenses,
wherein M-kinds (M is an integer of two or more) of lens materials having glass deformation point temperatures of At1, At2, . . . , AtM, are used and diluted by a heat press method, wherein a contact surface of an N− - 1th lens (N is an arbitrary integer of two or more and M or less) contacted with an Nth lens is a concave face, a contact surface of the Nth lens contacted with the N−
1th lens is a convex face, andwherein the glass deformation point temperatures have a relation of AtN-1>
AtN. - View Dependent Claims (14)
- 1th lens (N is an arbitrary integer of two or more and M or less) contacted with an Nth lens is a concave face, a contact surface of the Nth lens contacted with the N−
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2. A method of manufacturing a multifocal lens that includes a group of two layered lenses, comprising
a) forming a first lens by diluting a first lens material having a glass deformation point temperature At1; -
b) forming a second lens by diluting a second lens material having a glass deformation point temperature At2 (At1>
At2) while using the first lens as a part of a molding die, andc) bonding the second lens to the first lens simultaneously with step b) so that a contact surface of the first lens contacting with the second lens is a concave face and a contact surface of the second lens contacting with first lens is a convex face. - View Dependent Claims (11, 12, 13)
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3. A method of manufacturing a multifocal lens that includes a group of three layered lenses, comprising:
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a) forming a first lens by diluting a first lens material having the glass deformation point temperature At1 with heat pressing; b) forming a second lens by diluting a second lens material having a glass deformation point temperature At2 (At1>
At2) with heat pressing while using the first lens as a part of a molding die;c) bonding the second lens to the first lens simultaneously with step b) d) forming a third lens by diluting a third lens material having a glass deformation point temperature At3 (At1>
At2>
At3) with heat pressing while using the first lens and/or the second lens as a part of a molding die; ande) bonding the third lens to the first lens and/or the second lens simultaneously with step d). - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification