US 12,358,211 B2
Method for the production of an optical element by additive manufacturing
Maxime Lecompere, Charenton-le-Pont (FR); Pierre Leite, Charenton-le-Pont (FR); and Manuel Theodet, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/621,510
Filed by Essior International, Charenton-le-Pont (FR)
PCT Filed Jun. 23, 2020, PCT No. PCT/EP2020/067539
§ 371(c)(1), (2) Date Dec. 21, 2021,
PCT Pub. No. WO2020/260306, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 19305829 (EP), filed on Jun. 24, 2019.
Prior Publication US 2022/0347917 A1, Nov. 3, 2022
Int. Cl. B29C 64/129 (2017.01); B29C 64/188 (2017.01); B29C 64/264 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/20 (2020.01); B33Y 80/00 (2015.01); B29L 11/00 (2006.01)
CPC B29C 64/129 (2017.08) [B29C 64/188 (2017.08); B29C 64/264 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/20 (2020.01); B33Y 80/00 (2014.12); B29L 2011/0016 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A process for the production of an optical element from a curable material by using an additive manufacturing technology, comprising a multiplicity of curing steps for curing said curable material inside outlines, a geometry of which is determined according to the geometry of said optical element, by applying a curing surface energy onto the curable material that is higher in a first area that extends along said outline than in a second area situated within the first area, the curing surface energy applied to the second area being strictly lower than a first predetermined energy threshold,
wherein the curing surface energy is applied by a forming unit suitable to generate a pixelated pattern on a surface of the curable material that creates voxels in the curable material and wherein said first area has a width greater than 3 voxels and less than 10 voxels.