US 12,263,655 B2
Method for the manufacturing of an optical element, optical element thus obtained
Mathieu Feuillade, Charenton-le-Pont (FR); Pierre Fromentin, Bangkok (TH); Maxime Lecompere, Charenton-le-Pont (FR); and Pierre Leite, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/282,693
Filed by Essilor International, Charenton-le-Pont (FR)
PCT Filed Oct. 3, 2019, PCT No. PCT/EP2019/076831
§ 371(c)(1), (2) Date Apr. 2, 2021,
PCT Pub. No. WO2020/070253, PCT Pub. Date Apr. 9, 2020.
Claims priority of application No. 18306315 (EP), filed on Oct. 5, 2018.
Prior Publication US 2021/0379846 A1, Dec. 9, 2021
Int. Cl. B29D 11/00 (2006.01); B29C 64/112 (2017.01); G02C 7/04 (2006.01); B33Y 10/00 (2015.01)
CPC B29D 11/00355 (2013.01) [B29C 64/112 (2017.08); G02C 7/04 (2013.01); B33Y 10/00 (2014.12)] 16 Claims
OG exemplary drawing
 
1. A method for the manufacturing of an optical element having a refractive index above 1.59, said method consisting of:
a step of providing a predetermined build support,
at least one step A of providing a predetermined volume of a liquid mixture of polymerizable compounds on said support,
wherein,
the liquid mixture of polymerizable compounds consists in:
i) at least one compound C1 having at least one alkynyl functional group or at least two functional groups independently selected from the group consisting of alkenyl, isocyanato and epoxy functional groups,
ii) at least one compound C2 having at least two terminal functional groups that are mercapto groups, and
iii) optionally at least one polymerization initiator,
and wherein said method further comprises:
at least one step B of additively manufacturing said optical element by depositing a plurality of predetermined volume elements of said liquid mixture of polymerizable compounds on said predetermined build support,
at least one step C of inducing partial polymerization of the polymerizable compounds in said volume elements at least until a gel point of said liquid mixture of said polymerizable compounds is reached,
a final step D of completing polymerization of the polymerizable compounds in said volume elements to form said optical element.