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Cured product, and optical element, diffractive optical element, optical apparatus, and imaging device using the cured product

A technology of diffractive optical elements and cured products, applied in chemical instruments and methods, optical elements, optical elements, etc.

Active Publication Date: 2019-11-22
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resins of known diffractive optical elements often absorb water

Method used

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  • Cured product, and optical element, diffractive optical element, optical apparatus, and imaging device using the cured product
  • Cured product, and optical element, diffractive optical element, optical apparatus, and imaging device using the cured product
  • Cured product, and optical element, diffractive optical element, optical apparatus, and imaging device using the cured product

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0016] cured product

[0017] The cured product according to the first embodiment has little change in volume in a high-temperature, high-humidity environment, and is therefore suitable for optical use. The cured product of the present embodiment contains a dispersant, inorganic particles, and a resin that is a polymerization or copolymerization product of a curable resin. A cured product is prepared by curing a resin composition to polymerize or copolymerize a curable resin. The term "resin composition" used herein refers to a material to be cured, which is composed of raw materials of a cured product.

[0018] curable resin

[0019] The curable resin is liquid at room temperature and can be cured by a radical generation mechanism using a polymerization initiator such as a photopolymerization initiator or a thermal polymerization initiator.

[0020] Curable resins used herein may be, but are not limited to, acrylic resins, methacrylic resins, vinyl resins, or epoxy-based r...

Embodiment 1

[0085] A dispersion liquid (30.893 g) was prepared in which zirconia was dispersed in methanol (manufactured by Sakai Chemical Industry). The average particle diameter of the inorganic particles in the dispersion liquid was 5 nm, and the zirconia content was 31.422 parts by mass. 1.691 g of ω-carboxypolycaprolactone monoacrylate (M-5300, manufactured by Toagosei) was also prepared as a dispersant. Tris(2-acryloyloxyethyl)isocyanurate (2.952g), pentaerythritol triacrylate (0.510g) and dicyclopentenyloxyethyl methacrylate (4.154g) were prepared as UV-curable resin. In addition, 0.236 g of 1-hydroxycyclohexyl phenyl ketone was prepared as a photopolymerization initiator. Combine ingredients in bottle.

[0086] The mixture was subjected to ultrasonic cleaning for 30 minutes using an ultrasonic cleaning device BRANSON 1210 (available from Emerson Japan) and then subjected to filtration through a syringe filter (PTFE, 0.8 μm and 0.2 μm in pore size) to remove aggregates. Then, t...

Embodiment 3

[0107] A dispersion (30.776 g) and a dispersant (1.267 g) were prepared. Tris(2-acryloyloxyethyl)isocyanurate (2.245g), pentaerythritol triacrylate (1.414g) and dicyclopentenyloxyethyl methacrylate (4.407g) were also mixed as curable resin. The weight of 1-hydroxycyclohexyl phenyl ketone added as a photopolymerization initiator was changed to 0.249 g. Except for these, a resin composition was prepared under the same conditions as in Example 1.

[0108] The percentages of the inorganic particles, the dispersant, the monomer and the monomer having a hydroxyl group in the cured product to be formed by curing the resin composition were calculated with respect to the volume of the cured product under the same conditions as in Example 1.

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Abstract

The invention provides a cured product, and an optical element, diffractive optical element, optical apparatus, and imaging device using the cured product. The cured product contains a dispersant, inorganic particles, and a resin that is a product of polymerization or copolymerization of a curable resin. The dispersant contains a compound represented by a formula R-X, wherein R represents a grouphaving an acryloyloxy group or a methacryloyloxy group at an end of the molecule thereof, and X represents a carboxyl group. The dispersant content is 10 parts by volume to 20 parts by volume relativeto 100 parts by volume of the cured product. The curable resin contains at least one monomer having an N number of polymerizable reactive group, wherein N represents an integer of 2 or more. The proportion of the at least one monomer is 25 parts by volume to 76 parts by volume relative to 100 parts by volume of the cured product.

Description

technical field [0001] The present disclosure relates to cured materials for lenses and other optical elements used in imaging devices such as still cameras and video cameras. Background technique [0002] Organic / inorganic composite materials having characteristics of both organic materials and inorganic materials exhibit physical properties that inorganic materials or organic materials do not have, and thus are expected to be used in various fields. Particularly in the field of optics, nanocomposite materials prepared by combining organic materials and inorganic materials on the nanoscale are expected as optical materials. It is known that physical properties that cannot be achieved only by organic materials are realized by dispersing inorganic particles having a particle diameter on the order of nanometers in a resin, which is an organic material. [0003] In particular, a cured product of a resin composition in which particles of an inorganic material having a high refr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F222/20C08F222/24C08F220/40G02B1/04G02B5/18
CPCC08F283/01G02B1/04G02B5/18C08F222/22C08F220/40B32B27/08B32B27/20B32B27/308B32B2264/102B32B2307/418B32B2551/00C08K3/22C08K3/36C08K2003/2244C08K2201/005C08K2201/011G02B5/1814G02B5/1852G02B5/1866G02B27/0037B32B2264/1024C08K3/24
Inventor 宇久田秀雄大石江美鹤木雄太
Owner CANON KK
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