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Title:
MULTILAYER FILM, OPTICAL COMPONENT, SPECTACLES AND METHOD FOR PRODUCING MULTILAYER FILM
Document Type and Number:
WIPO Patent Application WO/2024/053124
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a multilayer film having excellent antifogging properties and excellent antifogging retention properties by forming a low refractive index layer having a certain film thickness above a layer having a photocatalytic function. In order to solve this problem, the following multilayer film is provided. Namely, the multilayer film is characterized in that the multilayer film has, directly on the surface of or via another layer on a substrate, a layer having a film thickness of 70-300 nm inclusive and containing cerium oxide having a cubic polycrystalline structure, has, above the layer containing cerium oxide, a layer having a film thickness of 50-240 nm inclusive and a refractive index at a wavelength of 500 nm of 1.46-1.65 inclusive and containing silicon oxide, and has, above the layer containing silicon oxide, a layer having a film thickness of 2-10 nm inclusive and a refractive index at a wavelength of 500 nm of 1.33-1.45 inclusive and containing porous silica.

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Inventors:
KONAGAI MANABU (JP)
MURATA TETSUYA (JP)
TOMATSU MORITADA (JP)
Application Number:
PCT/JP2022/046336
Publication Date:
March 14, 2024
Filing Date:
December 16, 2022
Export Citation:
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Assignee:
CANON OPTRON INC (JP)
International Classes:
G02B1/10; B32B9/00; C03C17/34; C09K3/00; G02C7/00
Domestic Patent References:
WO2019221255A12019-11-21
Foreign References:
JPH0836101A1996-02-06
JPH04116501A1992-04-17
JPH04116502A1992-04-17
JPH06312467A1994-11-08
JPH01273001A1989-10-31
JPH0553001A1993-03-05
JP2018097372A2018-06-21
JP2010500277A2010-01-07
US5897925A1999-04-27
JP2007204780A2007-08-16
JP2013254023A2013-12-19
Attorney, Agent or Firm:
OKABE Yuzuru et al. (JP)
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