The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2024
Filed:
Sep. 26, 2019
Essilor International, Charenton-le-pont, FR;
Coralie Barrau, Charenton-le-pont, FR;
Elise Poletto, Charenton-le-pont, FR;
Jean-Philippe Dumont, Charenton-le-pont, FR;
Christelle Marck, Charenton-le-pont, FR;
Céline Robin, Charenton-le-pont, FR;
Valérie Jacquemin, Charenton-le-pont, FR;
Elliot French, Dallas, TX (US);
Essilor International, Charenton-le-pont, FR;
Abstract
This ophthalmic lens for improving vision has a light cut factor CutLED between 32% and 90%, for wavelengths ranging from 380 nm to 500 nm, defined by formula (I), where Σ is a discrete or continuous sum operator, λ is the wavelength in nm, lens T % is the spectral transmittance of the lens in % and LED emission is the spectral distribution of a white light emitting diode; a mean luminous transmittance in the visible range higher than or equal to 75%; and light transmitted through the ophthalmic lens has a colorimetric value b*, as defined in the colorimetric CIE L*a*b* with illuminant D65, lower than 25.