US 11,852,784 B2
Optical article comprising a substrate with embedded particles for light transmission enhancement
Pierre Fromentin, Bangkok (TH); Hélène Maury, Charenton-le-pont (FR); Francisco De Ayguavives, Charenton-le-pont (FR); and Thanisararat Saleesung, Bangkok (TH)
Assigned to Essilor International, Charenton-le-pont (FR)
Appl. No. 16/637,588
Filed by Essilor International, Charenton-le-pont (FR)
PCT Filed Aug. 8, 2018, PCT No. PCT/EP2018/071469
§ 371(c)(1), (2) Date Feb. 7, 2020,
PCT Pub. No. WO2019/030263, PCT Pub. Date Feb. 14, 2019.
Claims priority of application No. 17306061 (EP), filed on Aug. 9, 2017.
Prior Publication US 2020/0183053 A1, Jun. 11, 2020
Int. Cl. G02B 1/111 (2015.01); G03B 21/625 (2014.01)
CPC G02B 1/111 (2013.01) [G03B 21/625 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical article having a substrate and optional coatings, wherein the substrate is made of an optical material comprising a polymer matrix, the substrate comprises an external layer, and said external layer of the substrate is made of said optical material comprising said polymer matrix, and particles are embedded into said polymer matrix, a refractive index of the particles (Rp) is lower than a refractive index of the polymer matrix (Rs),
and wherein the substrate is the base constituent of the optical article and is configured to support a stack of one or more coatings.