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Spectacle lens with invisible microstructure

A microstructure and spectacle lens technology, applied in the field of spectacle lenses, can solve the problems of affecting visual perception, difficulty in designing and preparing small-area mirrors, aesthetic defects of spectacle lenses, etc., and achieve the effect of facilitating design and processing, and inhibiting the development of myopia

Active Publication Date: 2021-08-13
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there will be many small protrusions or depressions on the surface of the spectacle lens to form the second refractive area, which will cause major defects in the aesthetics of the spectacle lens and affect the visual perception
At the same time, when the object-side surface 1 is a progressive surface, the design and preparation difficulty of the small-area mirror will also increase, so this structural design is not suitable for progressive ophthalmic lenses

Method used

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  • Spectacle lens with invisible microstructure
  • Spectacle lens with invisible microstructure
  • Spectacle lens with invisible microstructure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one: a kind of spectacle lens with invisible microstructure, such as figure 1 As shown, there is an object-side surface 1 and an eye-side surface 2 . For the eye-side surface 2, after the traditional spherical surface processing, an annular groove is engraved on the spherical surface. After engraving the groove, due to interference imaging, it is equivalent to having a second focal plane on both sides of the focal plane. The front and rear focal planes are the same distance from the main focal plane, and the energy of the front and rear focal planes is the same.

[0029] see figure 2 , the main lens is the main lens of the lens, and its focal length is set as F; the microlens is the secondary lens, and its focal length is set as f, and the distance between the secondary focal plane and the main focal plane is d. Knowing the main focal length F and the focal plane difference d, the secondary focal length can be calculated.

[0030] The focal length of the ...

example 1

[0038] n=1.597 (nominal refractive index 1.6), myopia 300 degrees. The radius of curvature of the first surface is 392.76mm, the radius of curvature of the second surface is 131.2mm, and the center thickness is 1.2. Then it can be obtained that the main focal length of the lens is 330mm, if the focal plane needs to be advanced by 10mm, the secondary focal length is 320mm, and the calculated secondary radius of curvature is 128.5mm. If the focal plane needs to be advanced by 20mm, the calculated secondary curvature radius is 125.8mm.

example 2

[0040] n=1.499 (nominal refractive index 1.49), myopia is 400 degrees. The radius of curvature of the first surface is 457.8mm, the radius of curvature of the second surface is 98mm, and the center thickness is 1.2mm. The calculated focal length of the lens is 249.9mm. If the focal plane needs to be 10mm backward, the radius of curvature is 104.07mm. If the focal plane needs to be shifted back by 40mm, the calculated radius of curvature is 109.9mm. If it needs to be moved back by 100mm, the calculated secondary radius of curvature is 126.4mm.

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Abstract

The invention discloses a spectacle lens with invisible microstructure. The lens comprises an object-side surface and an eye-side surface, the lens comprises a first refractive region having a first refractive power based on correcting refractive errors of an eye, and a second refractive region having a refractive power different from the first refractive power and has a function of imaging an object at a position other than the retina of the eye to suppress the development of refractive error of the eye, and the lens is characterized in that: the second refractive region is configured from a plurality of circular sub-regions distributed on the eye-side surface, the diameter of each sub-region is 2-6 mm, each sub-region is provided with a plurality of annular etching grooves, the width of each etching groove is 30-100 microns, and the distribution and depth of the etching grooves enable the sub-regions to form a micro-lens structure and provide second refractive power. While the development of myopia can be inhibited, the attractiveness of the spectacle lenses is not influenced.

Description

technical field [0001] The invention relates to an ophthalmic lens, in particular to an ophthalmic lens with microstructure, especially an ophthalmic lens with invisible microstructure. Background technique [0002] The human eye plays a vital role in obtaining human information. According to statistics, more than 80% of human information acquisition comes from the eye. At present, social life is full of various electronic screens, which emit light of different intensities, and the human eye is used more and more every day, resulting in continuous refractive error of the human eye, and this refractive error Growth is not accelerating. According to incomplete statistics, more than 80% of college students have refractive errors of more than 200 degrees. [0003] On the basis of refractive correction, there have been functional spectacle lenses that can suppress the refractive error of the human eye. For example, a concentric Fresnel multi-focal lens is set, and multiple ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/02G02B3/08
CPCG02C7/02G02B3/08
Inventor 任建锋黄启泰倪颖颜蒙李春琦李林峰
Owner SUZHOU UNIV