Resin-bond type optical element, production method therefor and optical article
AssigneeNikon Corporation
InventorsAkiko Miyakawa, Toru Nakamura, Masahito Suzuki
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Abstract
This invention provides a resin-cemented optical element comprising a base member and a resin layer formed on the surface of the base member and comprising a cured product of a photosensitive resin composition, and the resin layer has (1) a refractive index of 1.55 or more, (2) a visible-light inner transmittance of 95% or more in a 100 μm thick area, (3) a rate of hygroscopic dimensional change of 0.4% or less, (4) a durometer hardness of HDD 70 or more, (5) a gel percentage of 95% or more, (6) a glass transition temperature of 95° C. or above or (7) a rate of shrinkage on curing of 7% or less; and a production process for the element and an optical article having the element.
Claims5
An optical element comprising:
- a base member that is a glass lens;
- and
- a resin layer formed on the surface of the base member and comprising a cured product of a photosensitive resin composition having,
- a polyfunctional (meth)acrylate;
- a polyfunctional urethane-modified (meth)acrylate;
- and
- a photopolymerization initiator,
- wherein at least a part of said polyfunctional (meth)acrylate is represented by the following Formula (1):
- wherein R1 and R2 are each a hydrogen atom or a methyl group, R3 and R4 are each a hydrocarbon group having 2 to 4 carbon atoms, and m and n are each an integer of 1 or more.
Dependencies are inferred from the claim text.