Invention Grant
- Patent Title: Photochromic ophthalmic lens
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Application No.: US14434998Application Date: 2013-10-10
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Publication No.: US09625740B2Publication Date: 2017-04-18
- Inventor: Amelie Kudla , Helene Maury
- Applicant: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
- Applicant Address: FR Charenton le Pont
- Assignee: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
- Current Assignee: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
- Current Assignee Address: FR Charenton le Pont
- Agency: Young & Thompson
- Priority: FR1259714 20121011
- International Application: PCT/FR2013/052426 WO 20131010
- International Announcement: WO2014/057226 WO 20140417
- Main IPC: G02C7/10
- IPC: G02C7/10 ; G02B5/23

Abstract:
A photochromic ophthalmic lens includes a photochromic substrate and a filter having at least one layer formed on the main front face of the lens. The filter has a total thickness ≦700 nm and the front face has: an average UVA reflection factor over a range of wavelengths from 330 to 380 nanometers that is ≦40%, for an incident angle between 0° and 15°, an average blue reflection factor over a range of wavelengths from 420 to 450 nanometers that is ≧5%, for an incident angle between 0° and 15°, a spectral reflectivity curve for an incident angle between 0° and 15°, the reflectivity curve having a reflectivity maximum at a wavelength
Public/Granted literature
- US20150261010A1 PHOTOCHROMIC OPHTHALMIC LENS Public/Granted day:2015-09-17
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