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Patent Searching and Data


Title:
OPTICAL FILM, AND OPTICAL LAMINATE AND EYEWEAR HAVING THIS
Document Type and Number:
WIPO Patent Application WO/2021/206024
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide eyewear such as polarized sunglasses that uses an optical film having a light reflective layer and a polarization element layer and that has a metallic color tone conforming to the signal visibility standards in various countries; and to provide an optical film and an optical laminate for this eyewear. An optical film that is obtained by laminating a light reflective layer and a polarization element layer and that satisfies at least one of (a) through (d) below is provided. (a) The center reflection wavelength of the light reflective layer is at least 600 nm and less than 660 nm, and the transmitted hue of the optical film is within the range -15 ≤ a* ≤ 10 and -20 ≤ b* ≤ 20. (b) The central reflection wavelength of the light reflective layer is at least 500 nm and less than 600 nm, and the transmitted hue of the optical film is within the range -5 ≤ a* ≤ 20 and -20 ≤ b* ≤ 30. (c) The central reflection wavelength of the light reflective layer is at least 660 nm and less than 750 nm, and the transmitted hue of the optical film is within the range -10 ≤ a* ≤ 10 and -5 ≤ b* ≤ 35. (d) The central reflection wavelength of the light reflective layer is at least 400 nm and less than 500 nm, the minimum transmittance of the light reflective layer at at least 400 nm and less than 500 nm is at least 15%, and the transmitted hue of the optical film is within the range -15 ≤ a* ≤ 25 and -10 ≤ b* ≤ 40.

Inventors:
YAHAGI YOSHIYUKI (JP)
HOSHINO SAKI (JP)
AIKAWA YUKI (JP)
MURAI KATSUYUKI (JP)
NAKAMURA KYOUSUKE (JP)
SAKAJIRI AYA (JP)
KANEDA MASASHI (JP)
Application Number:
PCT/JP2021/014350
Publication Date:
October 14, 2021
Filing Date:
April 02, 2021
Export Citation:
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Assignee:
NIPPON KAYAKU KK (JP)
MITSUBISHI GAS CHEMICAL CO (JP)
MGC FILSHEET CO LTD (JP)
International Classes:
G02B5/30; G02C7/12
Domestic Patent References:
WO2017175829A12017-10-12
WO2016002582A12016-01-07
WO2018186369A12018-10-11
WO2017175830A12017-10-12
Foreign References:
JP2014513315A2014-05-29
JP2005128110A2005-05-19
JP2003307620A2003-10-31
Attorney, Agent or Firm:
ONO Makoto et al. (JP)
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