Composite optical element and process for production thereof, and imaging device and optical recording/reproduction device each equipped with the composite optical element

Patent metadata

Field	Value
Publication number	US-9511517-B2
Application number	US-201013382083-A
Country	US
Kind code	B2
Filing date	Jul 13, 2010
Priority date	Jul 16, 2009
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

The present invention provides a composite optical element including a resin layer that is less susceptible to yellowing and has small cure shrinkage during formation. The present invention is a composite optical element including a resin layer obtained by polymerizing a resin composition containing a (meth)acrylate compound of a saturated aliphatic epoxy compound, a multifunctional isocyanurate compound, and a photopolymerization initiator.

First claim

The invention claimed is:

1. A composite optical element comprising a resin layer obtained by polymerizing a resin composition containing
a (meth)acrylate compound of a saturated aliphatic epoxy compound,
a multifunctional isocyanurate compound, and
a photopolymerization initiator,
wherein the (meth)acrylate compound is a compound represented by a formula:

where R 1 and R 2 each denote a hydrogen atom or a methyl group, and R 3 denotes a saturated aliphatic hydrocarbon group,
wherein the multifunctional isocyanurate compound is a compound represented by a formula:

where l+m+n=1, 0.9 or 2.2.

2. The composite optical element according to claim 1 , wherein the R 3 is a linear saturated aliphatic hydrocarbon group.

3. The composite optical element according to claim 1 , wherein the resin composition contains two or more types of the (meth)acrylate compounds.

4. The composite optical element according to claim 1 , wherein the resin composition contains a (meth)acrylate compound in which R 3 in the formula (1) is a linear saturated aliphatic hydrocarbon group, and a (meth)acrylate compound in which R 3 in the formula (1) is a cyclic saturated aliphatic hydrocarbon group.

5. The composite optical element according to claim 1 , wherein the resin composition further contains urethane acrylate.

6. The composite optical element according to claim 1 , wherein the resin composition further contains an organosilane compound.

7. The composite optical element according to claim 1 , wherein the resin composition further contains a fluorine compound.

8. The composite optical element according to claim 1 , comprising the resin layer, and an optical substrate with the resin layer being formed on an upper surface thereof.

9. The composite optical element according to claim 8 , wherein the optical substrate has a thickness of at least 1 mm but not more than 30 mm, and the surface of the optical substrate on which the resin layer is formed has a curvature radius of at least 3 mm but not more than 100 mm.

10. The composite optical element according to claim 1 , wherein the resin layer has a thickness of at least 50 μm but not more than 2000 μm, and the thickness varies with location.

11. An imaging device comprising the composite optical element according to claim 1 .

12. An optical recording and reproducing device comprising the composite optical element according to claim 1 .

13. A composite optical element comprising a resin layer obtained by polymerizing a resin composition containing
a (meth)acrylate compound of a saturated aliphatic epoxy compound,
a multifunctional isocyanurate compound, and
a photopolymerization initiator,
wherein the (meth)acrylate compound is a compound represented by a formula:

where R 1 and R 2 each denote a hydrogen atom or a methyl group, and R 3 denotes a saturated aliphatic hydrocarbon group,
wherein the multifunctional isocyanurate compound is a compound represented by a formula:

where l+m+n=0.9.

Assignees

• Kobayashi Nobuyuki
• Panasonic Ip Man Co Ltd

Inventors

• Kobayashi Nobuyuki

Classifications

• G02B3/04

  with continuous faces that are rotationally symmetrical but deviate from a true sphere {, e.g. so called "aspheric" lenses} · CPC title

• G02B1/041

  Lenses · CPC title

• Y10T428/24479

  including variation in thickness · CPC title

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• B29C41/12

  Spreading-out the material on a substrate {, e.g. on the surface of a liquid} · CPC title