Ophthalmic lens for improving vision
US12130505B2 · kind B2 · utility
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2References
19Claims
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Key dates
| Filing date | Sep 26, 2019 |
| Grant date | Oct 29, 2024 |
| Priority date | — |
| Expiry date | Nov 20, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/108
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.