US 12,248,202 B2
Filter for eye cone cells protection
Mélanie Marie, Paris (FR); Serge Picaud, Paris (FR); Valérie Fradot, Paris (FR); José Sahel, Paris (FR); Thierry Villette, Charenton-le-Pont (FR); Coralie Barrau, Charenton-le-Pont (FR); and Camille Ehrismann, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR); and Sorbonne Université, Paris (FR)
Appl. No. 17/440,101
Filed by ESSILOR INTERNATIONAL, Charenton-le-Pont (FR); and SORBONNE UNIVERSITÉ, Paris (FR)
PCT Filed Mar. 13, 2020, PCT No. PCT/EP2020/056984
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2020/187799, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 19305328 (EP), filed on Mar. 18, 2019.
Prior Publication US 2022/0187627 A1, Jun. 16, 2022
Int. Cl. G02C 7/10 (2006.01)
CPC G02C 7/10 (2013.01) 14 Claims
OG exemplary drawing
 
1. An eye cone cells protecting filter, intended to be applied to at least one transparent surface, to filter incident light on said transparent surface, for preventing eye cone cells of a user, from damages due to illumination at physiological light levels on the eye of said user, and having spectral characteristics to:
filter light wavelengths between 405 and 465 nanometers; and
transmit a filtered light reaching the eye cone cells and having a harmfulness on said eye cone cells under a predefined maximum threshold, said predefined maximum threshold being determined based on a tolerated level of light hazard on cone cell (LHC) parameter;
wherein the eye cone cells protecting filter further comprises:
an active matrix for filtering incident light on said transparent surface;
an input for receiving measurements of transmitted light between the transparent surface and the eye
a processor for computing the spectral characteristics of the eye cone cells protecting filter on the basis of at least:
said transmitted light measurements; and
said predefined maximum threshold, and for controlling the active matrix to filter incident light on the basis of said computed spectral characteristics.