	US 12,235,525 B2
	Polarized lenses comprising mix of NIR dyes for broad NIR protection
Haifeng Shan, Dallas, TX (US); and Hao-Wen Chiu, Dallas, TX (US)
Assigned to Essilor International, Charenton-le-pont (FR)
Appl. No. 17/442,494
Filed by Essilor International, Charenton-le-pont (FR)
PCT Filed Mar. 23, 2020, PCT No. PCT/EP2020/057974 § 371(c)(1), (2) Date Sep. 23, 2021, PCT Pub. No. WO2020/193472, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 19305372 (EP), filed on Mar. 25, 2019.
Prior Publication US 2022/0171216 A1, Jun. 2, 2022
Int. Cl. G02C 7/10 (2006.01); C08K 5/00 (2006.01); G02B 1/04 (2006.01); G02C 7/12 (2006.01)

CPC G02C 7/104 (2013.01) [C08K 5/0041 (2013.01); G02B 1/041 (2013.01); G02C 7/12 (2013.01)]

10 Claims

1. An optical element comprising:

an optical substrate comprising a front surface and a back surface;

two or more near infrared absorbers substantially homogeneously mixed in the optical substrate; and

one or more functional films disposed on the front surface and/or back surface of the optical substrate;

wherein the two or more near infrared absorbers have different near infrared cut ranges and/or different residual colors and are adapted to synergistically cause a less than 10% reduction in average optical transmittance in a wavelength range of 380-780 nm for the optical substrate;

the one or more functional films comprise a polarized film having an average light transmittance level of less than about 50%;

the optical element has a substantially homogeneous color and an average light transmittance level higher than about 8%.