Title:
OPTICAL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/024962
Kind Code:
A1
Abstract:
An optical material which meets the requirements (1) to (3) mentioned below in a transmittance curve obtained by measuring at a thickness of 2 mm and has an a* value of -4 to 1 inclusive and a b* value of -1 to 11 inclusive as hue values in a CIE1976 (L*,a*,b*) color space. (1) The transmittance curve has a transmittance maximum value T1 in a wavelength range of 400 nm to 445 nm, wherein the maximum value T1 is 65% or more. (2) The transmittance curve has a transmittance minimum value T2 in a wavelength range of 445 nm to 485 m, wherein the minimum value T2 is 60% to 90% inclusive. (3) The smallest value among transmittances in a wavelength range of 650 nm to 800 nm is 75% or more, and the average value of transmittances in a wavelength range of 650 nm to 800 nm is 80% or more.
Inventors:
KAWATO NOBUO (JP)
TAKENAKA MANAMI (JP)
TAKENAKA MANAMI (JP)
Application Number:
PCT/JP2020/029564
Publication Date:
February 11, 2021
Filing Date:
July 31, 2020
Export Citation:
Assignee:
MITSUI CHEMICALS INC (JP)
International Classes:
C09B47/00; C08K5/3415; C08L101/00; G02B5/22; G02C7/04; G02C7/10
Domestic Patent References:
| WO2014119042A1 | 2014-08-07 | |||
| WO2018062385A1 | 2018-04-05 |
Foreign References:
| JP2017515822A | 2017-06-15 | |||
| CN109912607A | 2019-06-21 | |||
| JP2020094214A | 2020-06-18 | |||
| JP2020132596A | 2020-08-31 | |||
| JPS6216383B2 | 1987-04-13 | |||
| JP2019144875A | 2019-08-29 |
Other References:
"Octabromotetraphenylporphyrin and Its Metal Derivatives", INORG. CHEM., vol. 30, 1991, pages 239 - 245
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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