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Patent Searching and Data


Title:
OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2018/110018
Kind Code:
A1
Abstract:
An optical element is provided which has a multilayer film with excellent acid resistance and scratch resistance and which can exhibit a photocatalytic effect. This optical element has a glass substrate on which a multilayer film of three or more layers is formed, wherein the multilayer film comprises at least one low refractive index layer and at least one high refractive index layer, the top layer furthest from the glass substrate is a low refractive index layer, a high refractive index layer adjacent to the top layer is a functional layer having a metal oxide with a photocatalytic function as the main component, and at least one of the high refractive index layers is formed from a specific material having any of Ta, Hf, Zr and Nb as the main component, and satisfies the following conditional expressions: 220nm ≤ Tcat ≤ 600nm (1) 100nm ≤ TH (2) Here, Tcat is the film thickness of the functional layer, and TH is the total film thickness of the high refractive index layers formed from the specific material.

Inventors:
MATSUSAKA KEIJI (JP)
NOSE MASAAKI (JP)
NAKAMURA KATSUYA (JP)
AOKI YOSUKE (JP)
IMAZEKI HIDEKAZU (JP)
MIZUMACHI YASUSHI (JP)
NOMURA YASUYUKI (JP)
HAMA KEIJI (JP)
Application Number:
PCT/JP2017/033842
Publication Date:
June 21, 2018
Filing Date:
September 20, 2017
Export Citation:
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Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B1/115; G02B1/14; G02B1/18; G02B5/26; G02B5/28
Foreign References:
JP2000326440A2000-11-28
JP2000329904A2000-11-30
JP2006106242A2006-04-20
JP2000131513A2000-05-12
JP2001152418A2001-06-05
JP2013545145A2013-12-19
JP2011242697A2011-12-01
JP2011039218A2011-02-24
JP2008107425A2008-05-08
JP2005003614A2005-01-06
Attorney, Agent or Firm:
FUKUDA, Mitsuhiro (JP)
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