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Title:
ANTIREFLECTION FILM, OPTICAL ELEMENT, AND OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/058825
Kind Code:
A1
Abstract:
Provided are: an antireflection film having high durability; an optical element provided with the antireflection film; and an optical system provided with the optical element. An antireflection film provided with an intermediate layer, a silver-containing metal layer that contains silver and a dielectric layer which are laminated in this order as observed from the base member side, wherein the intermediate layer is a multilayer film having at least two layers in which a higher-refractive-index layer having a relatively high refractive index and a lower-refractive-index layer having a relatively low refractive index are laminated alternately, the dielectric layer has a surface exposed to air atmosphere, and the dielectric layer is a multilayer film containing a silicon-containing oxide layer, a magnesium fluoride layer, and an adhesive layer arranged between the silicon-containing oxide layer and the magnesium fluoride layer and capable of increasing the adhesion between the silicon-containing oxide layer and the magnesium fluoride layer.

Inventors:
NAKAMURA, Seigo (577 Ushijima, Kaisei-machi, Ashigarakami-gu, Kanagawa 77, 〒2588577, JP)
YOSHIHIRO, Tatsuya (577 Ushijima, Kaisei-machi, Ashigarakami-gu, Kanagawa 77, 〒2588577, JP)
UMEDA, Kenichi (577 Ushijima, Kaisei-machi, Ashigarakami-gu, Kanagawa 77, 〒2588577, JP)
ITAI, Yuichiro (577 Ushijima, Kaisei-machi, Ashigarakami-gu, Kanagawa 77, 〒2588577, JP)
Application Number:
JP2018/030563
Publication Date:
March 28, 2019
Filing Date:
August 17, 2018
Export Citation:
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Assignee:
FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
International Classes:
G02B1/115; B32B7/02; B32B9/00; B32B15/04; G02B1/111; G02B15/20
Domestic Patent References:
WO2017154302A12017-09-14
WO2016189848A12016-12-01
WO2015159839A12015-10-22
WO2015125498A12015-08-27
WO2018179825A12018-10-04
Foreign References:
JP2009071146A2009-04-02
JP2007299672A2007-11-15
JP2017125876A2017-07-20
JP2009162852A2009-07-23
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (3-17, Shinjuku 4-chome Shinjuku-k, Tokyo 22, 〒1600022, JP)
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