Invention Grant
- Patent Title: Optical article with high reflection in the near infrared region and in the blue light region
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Application No.: US16324043Application Date: 2017-04-28
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Publication No.: US11199729B2Publication Date: 2021-12-14
- Inventor: Xingzhao Ding , Shi Qin Gracia Loo , Andrew Rosales Pelayo
- Applicant: ESSILOR INTERNATIONAL
- Applicant Address: FR Charenton-le-Pont
- Assignee: ESSILOR INTERNATIONAL
- Current Assignee: ESSILOR INTERNATIONAL
- Current Assignee Address: FR Charenton-le-Pont
- Agency: Norton Rose Fulbright US LLP
- Priority: EP16306040 20160809
- International Application: PCT/IB2017/000666 WO 20170428
- International Announcement: WO2018/029516 WO 20180215
- Main IPC: G02C7/10
- IPC: G02C7/10 ; G02B5/28 ; G02B1/115

Abstract:
This invention relates to an optical article comprising a transparent substrate coated with an antireflective coating comprising at least two layers having a low refractive index, and at least two layers having a high refractive index, one layer having a high refractive index being the nearest from said substrate, characterized in that the total physical thickness of said antireflective coating is equal to or lower than 600 nm, and such that: —the mean reflection factor in the near infrared region is higher than or equal to 20% at an angle of incidence lower than 35°, and —the mean reflection factor RmB of blue light at a wavelength ranging from 420 to 450 nm is higher than or equal to 7.0% at an angle of incidence lower than 15°.
Public/Granted literature
- US20190171039A1 Optical Article with High Reflection in the Near Infrared Region and in the Blue Light Region Public/Granted day:2019-06-06
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