US 12,326,560 B2
Method for determining an optical system with a metasurface and associated products
Bruno Fermigier, Charenton-le-Pont (FR); Estelle Netter, Charenton-le-Pont (FR); William Trottier-Lapointe, Charenton-le-Pont (FR); and Claudine Biver, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/274,618
Filed by ESSILOR INTERNATIONAL, Charenton-le-Pont (FR)
PCT Filed Aug. 12, 2019, PCT No. PCT/EP2019/071591
§ 371(c)(1), (2) Date Mar. 9, 2021,
PCT Pub. No. WO2020/052881, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. 18193537 (EP), filed on Sep. 10, 2018.
Prior Publication US 2022/0050294 A1, Feb. 17, 2022
Int. Cl. G02C 7/02 (2006.01); G02B 1/00 (2006.01); G02B 27/01 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 1/002 (2013.01); G02C 7/022 (2013.01); G02C 7/024 (2013.01); G02B 2027/0178 (2013.01); G02B 2207/101 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A computer-implemented method for determining parameters of an optical system intended to be held by a frame and worn by a wearer, the optical system comprising a lens, the lens further comprising a metasurface, the metasurface being formed by at least a set of nanostructures, parameters being defined for the lens and the metasurface, the method comprising the steps of:
providing an optical system transmission target optical function and an optical system reflective target optical function,
providing an optical transmission cost function, the optical transmission cost function being related to an optical function of the system in transmission when the system is worn by the wearer,
providing an optical reflective cost function, the optical reflective cost function being related to an optical function of the system in reflection when the system is worn by the wearer, and
determining the optical system that minimizes the difference between a global cost function and a target value of the global cost function by modifying at least one parameter of the system, among which one of the metasurface, the global cost function being a function of the optical transmission cost function and of the optical reflective cost function and the target value being a function of the optical system transmission target optical function and of the optical system reflective target optical function.