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Optical lens including anti-reflection coating with multi-angle efficiency

A technology of anti-reflection coating and optical lens, applied in the field of optical lens

Active Publication Date: 2021-03-30
ESSILOR INT CIE GEN DOPTIQUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the average light reflection factor R v Depends on the angle of incidence θ, and commercial AR coatings have not been designed to provide low R at angles of incidence greater than 15° v value

Method used

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  • Optical lens including anti-reflection coating with multi-angle efficiency
  • Optical lens including anti-reflection coating with multi-angle efficiency
  • Optical lens including anti-reflection coating with multi-angle efficiency

Examples

Experimental program
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example

[0138] 1. Materials and Methods

[0139] The optical article used in the examples comprises a hard coating with a refractive index of about 1.5 (such as described in EP 0614957, denoted as HC1.5) or about 1.6 (denoted as HC1.6), a diameter of 65 mm, a refractive index A lens substrate of about 1.5 or about 1.6 and a power of -2.00 diopters.

[0140] The sublayers and layers of the antireflection coating are deposited by evaporation under vacuum (evaporation source: electron gun) without heating the substrate. In Example 13, the SiO used 2 / Al 2 o 3 The mixture is a mixture sold by Merck KGaA company, Germany (At 500 nm, the refractive index n=1.48).

[0141] The deposition framework was a Leybold 1104 machine equipped with an electron gun (ESV 148kV) for evaporating oxides and an ion gun (Commonwealth Mark II) for the preliminary stage to prepare the substrate surface using argon ions (IPC).

[0142] The thickness of these layers was controlled by a quartz microbalanc...

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Abstract

The present invention relates to an optical lens comprising a base material having a front main surface and a rear main surface, at least one of the main surfaces is coated with an anti-reflection coating so that in the range of the incident angle θ [0°-50°], the average light reflection factor Rv(θ) on the main surface of the coating is for an angle of incidence θ contained in the range [20°-50°] min presents the minimum value Rv min , and Rv min / Rv(15°)<0.95, Rv(15°) being the average light reflection factor for an angle of incidence θ of 15° on the coated main face. The optics can also be used to suppress reflection of light in the ultraviolet range.

Description

technical field [0001] The invention relates to an optical lens comprising on at least one of its main faces an antireflection coating which substantially reduces the reflection of visible light over a wide range of angles of incidence. The optical lens may be an ophthalmic lens, especially a spectacle lens. Background technique [0002] Anti-reflection coatings usually consist of multilayer stacks comprising interfering thin layers, usually based on the alternation of multiple layers of high and low refractive index dielectric or sol-gel materials. When deposited on transparent substrates of optical articles, the function of such coatings is to reduce the reflection of light at the article-air interface over a relatively large portion of the visible spectrum, and thus increase the transmission of light. A substrate so coated will increase its transmitted light / reflected light ratio, thereby improving the visibility of objects placed in front of the substrate. When seeking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/11G02B1/115
CPCG02B1/11G02B1/115G02C7/02
Inventor F·德艾瓜维韦斯H·莫里
Owner ESSILOR INT CIE GEN DOPTIQUE