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Asymmetric out-of-focus lens

An asymmetric, defocused technology, applied in the field of lenses, can solve the problems of UV protection, eye damage, etc., to achieve the effect of improving clarity, reducing damage, and improving light transmittance

Pending Publication Date: 2021-06-08
江苏鸿晨集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing lenses cannot protect against ultraviolet rays, which can cause damage to the eyes. Therefore, we propose an asymmetric defocus lens to solve the above problems

Method used

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  • Asymmetric out-of-focus lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] refer to figure 1 As shown, an asymmetric defocusing lens includes: a substrate and a protective film, wherein the substrate is made of a resin material, and the parts by weight include: 30 parts of polyisothiocyanate compounds, 50 parts of thiol compounds, 2 parts of catalyst, 5 parts of ultraviolet absorber, said catalyst is selected from two kinds in dibutyltin dichloride, stannous octoate, methyltin trichloride, trimethyltin chloride or dibutyltin dilaurate, etc. The ratio is mixed, and the ultraviolet absorber is prepared by uniformly dispersing rare earth oxides with a diameter of 20nm in alcohol ether solvents, and the mass concentration of rare earth oxides in alcohol ether solvents is 0.1%.

[0018] The preparation method of the substrate, a. Prepare the base liquid, put the polyisothiocyanate compound and the thiol compound into the container according to the components, stir and mix, heat up to 45°C, and stir at 1500r / min 45min; b. Stir the above base liquid...

Embodiment 2

[0021] refer to figure 1 As shown, an asymmetric defocusing lens includes: a substrate and a protective film, wherein the substrate is made of a resin material, and the parts by weight include: 50 parts of polyisothiocyanate compounds, 60 parts of thiol compounds, 3 parts of catalyst, 8 parts of ultraviolet absorber, said catalyst is selected from two kinds in dibutyltin dichloride, stannous octoate, methyltin trichloride, trimethyltin chloride or dibutyltin dilaurate, etc. The ratio is mixed, and the ultraviolet absorber is prepared by uniformly dispersing the rare earth oxide with a diameter of 30nm in the alcohol ether solvent, and the mass concentration of the rare earth oxide in the alcohol ether solvent is 0.5%.

[0022] The preparation method of the substrate, a. Prepare the base liquid, put the polyisothiocyanate compound and the thiol compound into the container according to the components, stir and mix, heat up to 55°C, and stir at 2500r / min 55min; b. Stir the above...

Embodiment 3

[0025] refer to figure 1 As shown, an asymmetric defocusing lens includes: a substrate and a protective film, wherein the substrate is made of a resin material, and the parts by weight include: 40 parts of polyisothiocyanate compounds, 55 parts of thiol compounds, 3 parts of catalyst, 7 parts of ultraviolet absorber, said catalyst is selected from two kinds in dibutyltin dichloride, stannous octoate, methyltin trichloride, trimethyltin chloride or dibutyltin dilaurate, etc. The ratio is mixed, and the ultraviolet absorber is prepared by uniformly dispersing rare earth oxides with a diameter of 25nm in alcohol ether solvents, and the mass concentration of rare earth oxides in alcohol ether solvents is 0.3%.

[0026] The preparation method of the substrate, a. Prepare the base liquid, put the polyisothiocyanate compound and the thiol compound into the container according to the components, stir and mix, heat up to 50°C, and stir at 2000r / min 50min; b. Stir the above base liquid...

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Abstract

The invention discloses an asymmetric out-of-focus lens which comprises a substrate and a protective film, wherein the substrate is made of a resin material, and comprises the following components in parts by weight: 30-50 parts of a polyisothiocyanate compound, 50-60 parts of a thiol compound, 2-3 parts of a catalyst and 5-8 parts of an ultraviolet absorbent. The catalyst is selected from two of dibutyltin dichloride, stannous octoate, methyltin trichloride, trimethyltin chloride or dibutyltin dilaurate and is mixed in equal proportion, the ultraviolet absorbent is prepared by uniformly dispersing rare earth oxide with the diameter of 20-30 nm in an alcohol ether solvent, and the mass concentration of the rare earth oxide in the alcohol ether solvent is 0.1%-0.5%. According to the invention, the ultraviolet absorption layer can obviously reduce the intensity of ultraviolet rays visually, so that the damage of the ultraviolet rays to the eyes of a user is reduced, and the use safety is improved; the light transmittance of the lens can be obviously improved through a light absorption indication layer and a photosensitive color-changing layer, so that the definition of the lens is improved to a certain extent.

Description

technical field [0001] The invention relates to the field of lenses, in particular to an asymmetric defocusing lens. Background technique [0002] When myopic patients use their eyes at close range, due to the accommodation lag, the light usually focuses on the position behind the retina and does not completely fall on the retina, while patients with esophoria will have a greater accommodation lag due to eye position problems , thus causing axial growth leading to increased myopia. Defocusing lenses can relieve nearsightedness. Defocus lenses only have a certain effect on myopic children with accommodation lag and esophoria. [0003] However, the existing lenses cannot protect against ultraviolet rays, which can cause damage to the eyes. Therefore, we propose an asymmetric defocusing lens to solve the above problems. Contents of the invention [0004] The main purpose of the present invention is to provide an asymmetric defocusing lens, which can effectively solve the p...

Claims

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Application Information

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IPC IPC(8): G02C7/06G02C7/10G02B1/14G02B1/11
CPCG02B1/11G02C7/06G02C7/10G02B1/14
Inventor 张荭
Owner 江苏鸿晨集团有限公司
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