US 12,147,093 B2
Diffusion of nanoparticles into transparent plastic
Inas Saleh Said, Haifa (IL); and Mahmud Ibrahem Diab, Tamra (IL)
Assigned to Rise Nano Optics Ltd., Haifa (IL)
Filed by Rise Nano Optics Ltd., Haifa (IL)
Filed on May 27, 2024, as Appl. No. 18/674,963.
Application 18/674,963 is a continuation of application No. 18/284,305, granted, now 11,994,755, previously published as PCT/IL2022/051080, filed on Oct. 11, 2022.
Claims priority of provisional application 63/354,740, filed on Jun. 23, 2022.
Claims priority of provisional application 63/272,744, filed on Oct. 28, 2021.
Prior Publication US 2024/0353693 A1, Oct. 24, 2024
Int. Cl. G02C 7/10 (2006.01); B82B 3/00 (2006.01); B82Y 20/00 (2011.01)
CPC G02C 7/102 (2013.01) [B82B 3/0014 (2013.01); B82Y 20/00 (2013.01); G02C 7/107 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of preparing an optical element made of a transparent plastic with embedded nanoparticles, the method comprising:
a) activating the surface of the optical element by attaching sulfate groups to the surface, comprising immersing the optical element in an aqueous solution of sulfuric acid for a period of time at a maintained activation temperature range; and
b) exposing the activated surface to nanoparticles, and allowing the nanoparticles to diffuse into the optical element;
wherein a concentration of the sulfuric acid solution, the maintained activation temperature range, and the period of time are selected to:
i) activate the surface sufficiently to at least double a diffusion rate of the nanoparticles into the optical element compared to a diffusion rate of the nanoparticles into the optical element using a same protocol but without activating its surface; and
ii) not cause visible damage to the optical quality of the optical element.