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Method for manufacturing a dispersion of hollow particles, an antireflective film, and an optical element

A manufacturing method and technology of anti-reflection coatings, applied in the direction of optical components, optics, anti-reflection coatings, etc., can solve problems such as increased scattering

Inactive Publication Date: 2014-02-12
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also has a problem in that since the core-shell particles in an aqueous medium are heated and dried, agglomerated hollow particles are obtained, and when such hollow particles are used for an antireflection film, scattering increases

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  • Method for manufacturing a dispersion of hollow particles, an antireflective film, and an optical element

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Embodiment Construction

[0013] The present invention relates to a method for producing a dispersion of hollow particles capable of reducing light scattering.

[0014] The method for producing a dispersion of hollow particles according to an exemplary embodiment of the present invention includes a step of forming core-shell type particles by forming a shell on the surface of a core particle formed of an organic compound in an aqueous medium, and using a hydrophobizing agent A step of treating the formed core-shell particles, and then extracting the treated core-shell particles with an aromatic organic solvent to obtain a dispersion of hollow particles formed by the shell. Herein, a core-shell type particle refers to a particle having a core (inner core) and a shell (outer shell) different in composition from each other.

[0015] The manufacturing method of a dispersion of hollow particles according to an exemplary embodiment of the present invention includes: a first step of forming core particles mainly m...

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Abstract

A method for manufacturing a dispersion of hollow particles includes producing a core-shell type particle by forming a shell made mainly of an inorganic-based compound on a surface of a particle made mainly of an organic compound in an aqueous medium, and obtaining the dispersion of the hollow particles formed of the shell by hydrophobizing the core-shell type particles and extracting the core-shell type particles with an aromatic organic solvent.

Description

Technical field [0001] The present invention relates to a method for producing a dispersion of hollow particles having a low refractive index. The present invention also relates to a method of manufacturing an anti-reflection film and a method of manufacturing an optical element. Background technique [0002] As a method for reducing the light reflected on the surface of an optical element such as a lens of a camera, a method of forming a film with a low refractive index on the surface using a material with a low refractive index is known. A dry film formation method of forming a film using a material having a low refractive index in a vacuum by sputtering or vapor deposition can be utilized as a method of forming a film having a low refractive index. It is also possible to use a wet film forming method, in which particles having a low refractive index are formed in a liquid phase, and then mixed with a paint, and then a film is formed by dip coating or spin coating. Considerin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18C03C17/23C09D1/00G02B1/11G02B1/111
CPCC09C1/3081C09C3/12C09D5/006C01P2004/03C01P2004/34C01P2004/62C01P2004/64C01P2004/84B01J13/18B01J13/20G02B1/111C08J9/26
Inventor 龟野优
Owner CANON KK