Title:
OPTICAL FILM, OPTICAL ELEMENT, AND OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/154302
Kind Code:
A1
Abstract:
Provided are: an optical film, which has a reflectance of 0.50 % or less with respect to wavelengths of 400 nm, 550 nm, and 700 nm, a visible light transmittance that is larger than that of a transparent base material, and excellent abrasion resistance; an optical element; and an optical system. The optical film has: a transparent base material 2; a dielectric layer 5; a metal layer 4, which has an interface to the dielectric layer 5, and which contains at least silver; and an intermediate layer 3 positioned between the metal layer 4 and the transparent base material 2. The film thickness of the metal layer 4 is less than 5.0 nm, and the metal layer 4 has a reflectance of 0.40 or less with respect to a wavelength of 550 nm.
Inventors:
YASUDA HIDEKI (JP)
Application Number:
PCT/JP2016/087203
Publication Date:
September 14, 2017
Filing Date:
December 14, 2016
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B1/115; B32B7/02; B32B15/04
Foreign References:
| JP2009521001A | 2009-05-28 | |||
| JP2007194109A | 2007-08-02 | |||
| JP4560889B2 | 2010-10-13 | |||
| JP2013238709A | 2013-11-28 |
Attorney, Agent or Firm:
NAKASHIMA Junko et al. (JP)
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