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Anti-reflective sputtering stack with low rv and low ruv

An anti-reflection coating, light reflection technology, applied in sputtering, coating, metal material coating processes, etc., can solve problems such as the effect of AR coating effectiveness

Active Publication Date: 2017-12-01
ESSILOR INT CIE GEN DOPTIQUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The coating deposition scheme can have a significant impact on the effectiveness of the deposited AR coating

Method used

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  • Anti-reflective sputtering stack with low rv and low ruv
  • Anti-reflective sputtering stack with low rv and low ruv
  • Anti-reflective sputtering stack with low rv and low ruv

Examples

Experimental program
Comparison scheme
Effect test

example

[0076] lens preparation

[0077] 1. Lens base material

[0078] Lenses: in Finished single vision uncoated plano lens in (polymer of diethylene glycol bis(allyl carbonate)), 6 base curve. PC Lenses: Finished single vision uncoated plano lenses in polycarbonate (PC), 6 base curve. PC lenses can be initially bare (uncoated) PC substrates or commercial PC lenses, initially with PDQ stripped prior to application of primer and / or hard coat TM coating. As typically known in the art, the base curvature of a lens corresponds to the curvature (expressed in diopters) of the front surface of the lens substrate: base curvature = 530 / R in mm (R = radius of curvature of the front surface of the spectacle lens) .

[0079] 2. Primer composition

[0080] 2.1 List of primers used:

[0081] Primer 1: W234 Aliphatic polyurethane dispersion.

[0082] Primer 2: High-refractive polyurethane dispersion with high-refractive colloids. Refractive index of cured primer: 1.63.

[0083] 2...

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PUM

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Abstract

The present invention provides a UV antireflective coating stack for ophthalmic lenses. The antireflective coating stack is deposited by sputtering, which lowers the reflectivity of the antireflective stack in the UV range and maintains low reflectivity in the visible range. The antireflective coating stack offers improved thermo-mechanical performance as compared to evaporation-based UV antireflective stacks.

Description

technical field [0001] The present invention relates to ophthalmic lenses having an antireflection layer on their back (concave) side. Background technique [0002] Ophthalmic lenses such as eyeglasses and sunglasses typically block potentially harmful ultraviolet (UV) light from passing through the lenses and reaching the wearer's eyes. The reduction in UV light transmission is especially important in sunglass applications, where dimming-induced pupillary dilation results in increased transmission of UV light through the dilated pupil. [0003] While such lenses help reduce the amount of UV light transmitted to the eye, potentially harmful UV light may take other routes to reach the eyeglass wearer's eyes. Peripheral light can reach the eye unobstructed and unfiltered by the lens coating. Light can also be reflected off the back of the lens and reach the eye. Reflected light is a source of potentially harmful UV light that has long been overlooked. [0004] More recentl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/115G02C7/02
CPCG02B1/115G02C7/02C23C14/0652C23C14/08C23C14/10C23C14/34G02B5/283B29D11/00865C23C14/081C23C14/083C23C14/3464G02B5/208G02C7/10
Inventor N·博格哈卡
Owner ESSILOR INT CIE GEN DOPTIQUE
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