Optical article comprising an antireflective coating in the visible region for low luminance conditions

一种减反射涂层、低折射率层的技术，应用在涂层、光学、光学部件等方向，能够解决暗视觉不准确等问题

Inactive Publication Date: 2018-01-26
RUPP HUBRACH OPTIK
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, these parameters are inaccurate for scotopic vision

Method used

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  • Optical article comprising an antireflective coating in the visible region for low luminance conditions
  • Optical article comprising an antireflective coating in the visible region for low luminance conditions
  • Optical article comprising an antireflective coating in the visible region for low luminance conditions

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[0127] 1. General procedure

[0128] Optical articles according to the invention were designed, produced and tested with the goal of achieving a minimum Rv'.

[0129] The optical article used in the examples according to the invention included a lens substrate having a diameter of 65 mm, 1.50 (by made), 1.60 (by made) or 1.67 (by made), and a focal power of -2.00 diopters, coated with a hardcoat index-matched to the underlying substrate and coated on the front with an anti-reflective coating of the present invention (see Table 1 ). For lenses 1 to 3, the HI sheet closest to the substrate is composed of a first SiO layer L1 and a second TiO 2 Layers made of double layer. For lens 4, the HI sheet closest to the substrate is a single TiO 2 Floor.

[0130] For comparison purposes, another optical article was prepared with an antireflection coating according to the prior art. This comparative lens includes the following lens substrate: The lens substrate has a diameter...

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Abstract

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack of at least one high refractive index layer (HI) having a refractive index higher than or equal to 1.55 and at least one low refractive index layer (LI) having a refractive index lower than 1.55, characterized in that said multilayered antireflective coating has: a mean light reflection factor in the visible region for photopic vision Rv lower than or equal to 2.5%, preferably lower than or equal to 0.9%, for at least an angle of incidence lower than 35 degrees; a mean light reflection factor in the visible region for scotopic vision Rv' lower than or equalto 0.5%, preferably lower than or equal to 0.4%, for at least an angle of incidence lower than 35 degrees.

Description

technical field [0001] The present invention relates to an optical article, in particular an ophthalmic lens comprising an anti-reflection coating which greatly reduces reflections in the visible region and takes into account the scotopic specificity of the human visual system. The optical article may in particular be an ophthalmic lens. Background technique [0002] Anti-reflection coatings are currently widely used in the ophthalmic industry to minimize reflections from lenses to improve wearer comfort and aesthetics. In general, the key goal of anti-reflection design is to achieve the lowest possible reflectance while taking into account different constraints such as manufacturing process, color robustness, and number of layers, etc. Antireflective coatings generally consist of multilayers comprising a number of thin interfering layers, usually based on the alternation of layers of dielectric material with a high refractive index and dielectric material with a low refrac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/115
CPCG02B1/115G02C7/104G02B1/11G02B1/116G02B1/113G02C7/10
Inventor C·赫费纳T·施泰因
Owner RUPP HUBRACH OPTIK
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