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Optical material and optical element

A technology of optical materials and polymers, applied in the field of optical materials and optical components, can solve problems such as optical materials that have not yet found universality

Inactive Publication Date: 2010-03-31
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a single resin has not been found as the desired versatile optical material

Method used

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  • Optical material and optical element
  • Optical material and optical element
  • Optical material and optical element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0036] The first optical material according to the present invention includes a polymer of a mixture containing at least a sulfur-containing compound, a fluorene compound, and an energy polymerization initiator.

[0037] (sulfur compounds)

[0038] The sulfur-containing compound included in the first optical material according to the present invention is a group containing at least one group selected from the group consisting of a sulfide group, a sulfone group, a sulfoxide group, a thiol group (mercapto group), and a thioester group in the molecule. compound of. In particular, in order to obtain a resin curable by energy such as light or heat, the compound preferably contains a polymerizable functional group such as an acrylic group, vinyl group or epoxy group.

[0039] Specific examples of sulfur-containing compounds include bis(4-vinylthiophenyl)sulfide, bis(4-methacryloylthiophenyl)sulfide, p-bis[β-(meth)acryloyloxy Ethylthio]xylylene, 4,4'-bis[β-(meth)acryloyloxyethylth...

Embodiment 1

[0061] Bis(4-vinylthiophenyl)sulfide (MPV) as a sulfur compound and represented by chemical formula (1) and having The fluorene compounds of the fluorene skeleton are mixed compatibly. A photoradical polymerization initiator: 2-hydroxy-2-methyl-1-phenyl-propan-1-one was added at 3% by weight to each of the resin component mixtures to obtain an optical material 11 (weight ratio of 1:1), optical material 12 (weight ratio is 1.5:1), optical material 13 (weight ratio is 2:1) and optical material 14 (weight ratio is 2.5:1), they are only made of the resin in the present invention become.

[0062] Second, pass Figures 2A-2D The fabrication steps shown in 11-14 yield molded parts from optical materials. Such as Figures 2A-2D As shown in , each of the optical materials 11-14 was clamped and fixed between the flat-shaped mold 31 and the glass substrate 41 using a spacer 51 (1 mm thick). Then, ultraviolet light 71 (total irradiation dose: 10 J) was emitted from above the glass su...

Embodiment approach 2

[0065] The second optical material according to the present invention includes a mixture containing at least a sulfur-containing compound, a fluorene compound, a polymerization initiator, and metal oxide fine particles. It should be noted that the sulfur-containing compound, fluorene compound and polymerization initiator are the same as in Embodiment 1.

[0066] (fine metal oxide particles)

[0067] Specific examples of the metal oxide fine particles included in the second optical material according to the present invention may include titanium oxide, niobium oxide, tantalum oxide, and tungsten oxide. Specifically, using TiO 2 , NbO, Nb 2 o 5 、 Ta 2 o 5 or WO 3 . The metal oxide fine particles may be composite oxide fine particles with Si, Ti, Sn, Zr or Al, if desired. In the following description, "metal oxide fine particles" are also referred to as "fine particles".

[0068] The average particle diameter of the metal oxide fine particles is preferably a particle dia...

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Abstract

Provided is an optical material including a polymer of a mixture which contains a sulfur-containing compound, a fluorene compound with a fluorene skeleton, and an energy polymerization initiator. The sulfur-containing compound contains, in a molecule, at least one kind of group selected from the group consisting of a sulfide group, a sulphone group, a sulfoxide group, a thiol group, and a thioester group. A refractive index of the polymer of the mixture is 1.65 or more to less than 1.92, an Abbe constant thereof is 15 or more to less than 22, and a difference [Delta][theta]g,F between a secondary dispersion property [theta]g,F thereof and a secondary dispersion property [theta]g,F of a normal optical material which is expressed by [theta]g,F=0.6438-0.001682[nu]d is 0.05 or more to less than 0.13.

Description

technical field [0001] The present invention relates to an optical material and an optical element, and more particularly, to an optical material suitable for forming an optical element used in an imaging optical system of a camera. Background technique [0002] So far, an example of a method of correcting chromatic aberration of an optical system including only a refractive system is a method of using a combination of glass materials having different dispersion properties. For example, an objective lens of a telescope includes a positive lens made of a glass material having a large Abbe constant (vd) and a negative lens made of a glass material having a small Abbe constant. A combination of positive and negative lenses is used to correct axial chromatic aberration. Therefore, when the lens structure or the number of lenses is limited or when the glass material used is limited, chromatic aberration may not be sufficiently corrected. In order to correct such chromatic aberr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04
CPCG02B1/04C08G75/045C08L85/00C08G61/12C08L65/00H10K50/00C08F228/04
Inventor 岩佐英史
Owner CANON KK
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