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Photochromic lens and preparation method and application thereof

A color-changing lens and photochromic technology, which is applied in the field of spectacle lenses, can solve problems such as the inability to meet the needs of the depth of color change, the inability to see objects, and the user's dizziness, so as to protect from strong light damage, avoid dizziness or instantaneous invisibility effect

Pending Publication Date: 2019-12-20
SHANGHAI CONANT OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing photochromic lenses have only one degree of color change depth in the state of complete color change, corresponding to a certain value of light transmittance, which cannot meet the needs of some users for different color change depths when looking at near and far outdoors.
Moreover, the photochromic lenses in the prior art undergo rapid deep discoloration under changes in light intensity, and this sudden change in depth will bring discomfort such as dizziness or momentary inability to see objects to the user.

Method used

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  • Photochromic lens and preparation method and application thereof
  • Photochromic lens and preparation method and application thereof
  • Photochromic lens and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0076] This embodiment provides a color-changing lens, the color-changing lens includes a substrate (1), a first photochromic gradient layer (2-1), a second photochromic gradient layer (2-2), a first hard reinforcement layer (3-1) and a second hard reinforcement layer (3-2); the first photochromic gradient layer (2-1) and the second photochromic gradient layer (2-1) and the second photochromic gradient layer (2-1) are arranged on both sides of the substrate (1) The color-changing gradient layer (2-2); the first hard strengthening layer (3-1) is arranged on the surface of the first photochromic gradient layer (2-1); the second photochromic gradient layer ( The surface of 2-2) is provided with the second hard strengthening layer (3-2).

[0077] The preparation method is as follows:

[0078] (1) The substrate (refractive index 1.74) was ultrasonically treated in 12% NaOH aqueous solution at 55°C for 12min, washed with pure water, dried, cooled to room temperature, placed in the ...

Embodiment 2

[0083] This embodiment provides a color-changing lens, the color-changing lens includes a substrate (1), a first photochromic gradient layer (2-1), a second photochromic gradient layer (2-2), a first hard reinforcement layer (3-1) and a second hard reinforcement layer (3-2); the first photochromic gradient layer (2-1) and the second photochromic gradient layer (2-1) and the second photochromic gradient layer (2-1) are arranged on both sides of the substrate (1) The color-changing gradient layer (2-2); the first hard strengthening layer (3-1) is arranged on the surface of the first photochromic gradient layer (2-1); the second photochromic gradient layer ( The surface of 2-2) is provided with the second hard strengthening layer (3-2).

[0084] The preparation method is as follows:

[0085] (1) The substrate (refractive index 1.67) is ultrasonically treated in 18% KOH aqueous solution at 60°C for 18min, washed with pure water, dried, cooled to room temperature, placed in the ph...

Embodiment 3

[0090] This embodiment provides a color-changing lens, which includes a substrate (1), a first photochromic gradient layer (2-1), a second photochromic gradient layer (2-2), a first hard A strengthening layer (3-1) and a second hard strengthening layer (3-2); the first photochromic gradient layer (2-1) and the second photochromic gradient layer (2-1) and the second light The first photochromic gradient layer (2-2); the first hard strengthening layer (3-1) is arranged on the surface of the first photochromic gradient layer (2-1); the second photochromic gradient layer The second hard strengthening layer (3-2) is provided on the surface of (2-2).

[0091] The preparation method is as follows:

[0092] (1) Ultrasonicate the substrate (refractive index 1.60) in 15% NaOH aqueous solution at 57°C for 15 minutes, wash with pure water, dry, cool to room temperature, place in photochromic coating solution, and dip-coat at 15°C for 10s Then pull out at a constant speed of 1.0 mm / s, dr...

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Abstract

The invention provides a photochromic lens, and a preparation method and an application thereof. The photochromic lens comprises a substrate, a first photochromic gradient layer, a second photochromicgradient layer, a first hard reinforcing layer and a second hard reinforcing layer. Firstly, the first photochromic gradient layer and the second photochromic gradient layer endow the photochromic lens with the properties of being colorless and transparent under indoor light intensity and becoming dark under outdoor sunlight activation; and secondly, through adopting a color fading treatment process, the photochromic lens presents different photochromic depths under the activation of sunlight, the gradual change effect of the photochromic lens is realized through the transition between different photochromic depths, the requirements of a user for different photochromic depths when the user looks near and far outdoors are met, and the discomfort brought to the user due to sudden change ofthe color depth is avoided. The photochromic lens can be obtained by adopting a layer-by-layer dip-coating, lifting and curing method, the preparation process is simple, and the photochromic lens hasa wide industrialization prospect.

Description

technical field [0001] The invention belongs to the technical field of spectacle lenses, and in particular relates to a color-changing lens and a preparation method and application thereof. Background technique [0002] Ultraviolet rays in sunlight can be divided into three categories according to their wavelengths: UVA, UVB and UVC. Among them, UVC is absorbed when it passes through the atmosphere, so the ultraviolet rays that affect the human eye are mainly UVA and UVB. When the light enters the eye, only about 4% is lost through the reflection of the corneal surface, and most of the light is refracted into the eye, and then absorbed by the cornea, aqueous humor, lens and vitreous body in turn. UV rays that cause damage to the eyes. Studies have shown that the damage of ultraviolet rays to the eyes is cumulative. Long-term exposure to ultraviolet rays can cause damage to the cornea, conjunctiva and lens, and increase the risk of conjunctivitis, keratitis, cataract and mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/10G02B1/14C08J7/04C09D5/29C09D183/06C08L69/00
CPCG02C7/102G02B1/14C08J7/04C09D5/29C09D4/00C09D183/06C08J2369/00C08G77/14
Inventor 唐忆君贺建友
Owner SHANGHAI CONANT OPTICS CO LTD
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