US 12,474,580 B2
Set of semi-finished lenses with holographic components
Aude Bouchier, Charenton-le-Pont (FR); Samuel Archambeau, Charenton-le-Pont (FR); and Karin Scherer, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-pont (FR)
Appl. No. 17/620,307
Filed by Essilor International, Charenton-le-Pont (FR)
PCT Filed Jun. 19, 2020, PCT No. PCT/EP2020/067190
§ 371(c)(1), (2) Date Dec. 17, 2021,
PCT Pub. No. WO2020/254628, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 19305814 (EP), filed on Jun. 21, 2019.
Prior Publication US 2022/0244542 A1, Aug. 4, 2022
Int. Cl. G02C 7/02 (2006.01); B29D 11/00 (2006.01); G02B 27/01 (2006.01); G02C 7/14 (2006.01)
CPC G02B 27/0172 (2013.01) [B29D 11/00432 (2013.01); B29D 11/00865 (2013.01); G02C 7/027 (2013.01); G02C 7/14 (2013.01); G02B 2027/0105 (2013.01); G02B 2027/0109 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A set of semi-finished ophthalmic lenses, wherein each semi-finished ophthalmic lens is used in manufacturing of a finished ophthalmic lens of determined target power, comprising:
a plurality of semi-finished ophthalmic lenses, each semi-finished lens having a base curve chosen among a number N of base curves, N being lower than 10, and including a holographic component recorded according to a holographic component configuration chosen among a limited number M of holographic components configurations, M being superior or equal to N,
wherein each base curve among the N base curves is associated to a respective range of target powers of finished ophthalmic lenses to be manufactured from the semi-finished lenses having said base curve, each range of target powers being defined by minimum and maximum target power values, and all the ranges being centered on respectively different target power values,
and each holographic component configuration among the M holographic component configurations is associated to a single base curve among the N base curves, such that two semi-finished ophthalmic lenses of the set have a holographic component according to a same holographic component configuration only when the two semi-finished ophthalmic lenses of the set have the same base curve, and
each holographic component configuration associated to a base curve is configured such that the holographic component has an optical power adapted to a middle power of the range of target powers corresponding to the base curve.