OPTICAL MATERIAL, POLYMERIZABLE COMPOSITION FOR OPTICAL MATERIAL, CURED PRODUCT, OPTICAL MATERIAL, PLASTIC LENS, METHOD FOR MANUFACTURING OPTICAL MATERIAL, AND METHOD FOR USING OPTICAL MATERIAL

WIPO Patent Application WO/2020/213716

A1

In an optical material according to the present disclosure, the transmittance curve measured with a thickness of 2 mm satisfies the characteristics in (1) and (2) below, and the hue in the CIE1976 (L*, a*, b*) color space satisfies the characteristic in (3). (1) Has a maximum value of transmittance at a wavelength of 400 nm to 450 nm or 520 nm to 570 nm, and the maximum value of the transmittance at a wavelength of 400 to 450 nm and the transmittance at a wavelength of 520 to 570 nm are at least equal to 50%. (2) Has a minimum value of transmittance at a wavelength of 470 to 500 nm, where the minimum value is at most equal to 40%. (3) The hue in the CIE1976 (L*, a*, b*) color space is such that a* is at least equal to 2.5 and at most equal to 5.5, and b* is at least equal to 5 and at most equal to 25.

MATSUI YUSUKE (JP)
SUESUGI KOUJI (JP)
ITO SHINSUKE (JP)
ODA HIROFUMI (JP)

PCT/JP2020/016889

October 22, 2020

April 17, 2020

Click for automatic bibliography generation  

MITSUI CHEMICALS INC (JP)
ITOH OPTICAL IND (JP)

C08G18/08; G02C7/00; C08G18/30; G02B5/22

WO2014011581A2	2014-01-16
WO2009101867A1	2009-08-20
WO2019238648A1	2019-12-19
WO2015037627A1	2015-03-19
WO2011055540A1	2011-05-12
WO2016125736A1	2016-08-11

JPS6324973B2	1988-05-23
JP2019502953A	2019-01-31
JP2011237730A	2011-11-24
JP2008239592A	2008-10-09
JP2013238634A	2013-11-28
JP2011237730A	2011-11-24
JP2019079855A	2019-05-23

See also references of EP 3958044A4

TAIYO, NAKAJIMA & KATO (JP)

View/Download PDF      PDF Help

Previous Patent: TITANIUM SHEET AND COPPER FOIL PRODUCTION DRUM

Next Patent: OPTICAL MATERIAL