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Title:
ANTIREFLECTIVE GLASS
Document Type and Number:
WIPO Patent Application WO/2023/026670
Kind Code:
A1
Abstract:
Provided is an antireflective glass comprising a glass substrate, an antireflective film and a protective layer in this order, in which the antireflective film is composed of a medium-to-small refractive index layer having a refractive index of 1.36 to 1.45 and a thickness of 150 to 210 nm, a medium refractive index layer having a refractive index of 1.56 to 1.79 and a thickness of 90 to 140 nm, a large refractive index layer having a refractive index of 1.75 to 1.87 and a thickness of 30 to 50 nm, and a small refractive index layer having a refractive index of 1.27 to 1.35 and a thickness of 70 to 75 nm in this order when observed from the glass substrate side, the refractive index of the large refractive index layer is larger than that of the medium refractive index layer, the protective layer has a refractive index of 1.43 to 1.48 and a thickness of 20 to 30 nm, each of the large refractive index layer, the small refractive index layer and the protective layer contains (A) an aluminum salt hydrate, the luminous average reflectance of each surface is 0.6% or less at a wavelength of 380 to 780 nm, and the luminous average transmittance of each surface is 98% or more at a wavelength of 380 to 780 nm. The antireflective glass has high antireflective performance and excellent alkali resistance, and can be used suitably for the production of an antireflective hardened glass.

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Inventors:
YOKOYAMA SHOICHI (JP)
ISHIKAWA SHOICHI (JP)
Application Number:
PCT/JP2022/025359
Publication Date:
March 02, 2023
Filing Date:
June 24, 2022
Export Citation:
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Assignee:
FUKUVI CHEMICAL IND CO LTD (JP)
International Classes:
C03C17/34; B32B9/00; B32B9/04; B32B17/06; G02B1/111
Domestic Patent References:
WO2019202942A12019-10-24
WO2016051750A12016-04-07
WO2019187417A12019-10-03
Foreign References:
JP2017178634A2017-10-05
JP2009058954A2009-03-19
JP2017530079A2017-10-12
JP2012203150A2012-10-22
JP2007284622A2007-11-01
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
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