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Dual-diopter glasses zooming method based on liquid crystal birefraction

A diopter and birefringence technology, applied in the field of glasses, can solve the problems of prismatic jump, unsightly appearance, bifocal lens spacing, etc., to improve vision, avoid excessive correction, and improve height control.

Inactive Publication Date: 2018-03-16
PUTIAN CITY ZHUHUO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aim is to realize automatic adjustment of the two focal lengths of spectacle lenses, to solve the problems of obvious intervals between different areas of bifocal lenses in the prior art, the appearance is not beautiful, and the phenomenon of prism jumping, etc., and to realize an automatic zooming method for glasses

Method used

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  • Dual-diopter glasses zooming method based on liquid crystal birefraction
  • Dual-diopter glasses zooming method based on liquid crystal birefraction
  • Dual-diopter glasses zooming method based on liquid crystal birefraction

Examples

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example 1

[0062] Example 1, such as Figure 7 As shown, the user needs to be equipped with myopia glasses with a normal diopter of 200 degrees and a second diopter of 150 degrees, that is, the first diopter is -2D, the second diopter is -1.5D, and the double diopter difference is -0.5D. In the figure, from bottom to top are the first lens substrate 101 , the liquid crystal layer 104 , and the second lens substrate 107 . Wherein, the lower surface of the first lens substrate 101 also uses polishing to fine-tune the lens diopter, and the radius of curvature of the upper and lower interfaces of the second lens substrate 107 is the same, and the diopter is 0.

[0063] The optical structure of the liquid crystal layer 104 is in the form of a concave-convex mirror, α=-1, and β=1; after the liquid crystal material is selected, the birefringence of the liquid crystal and the difference between the birefringence of the liquid crystal are determined, assuming that the first refractive index of ...

example 2

[0068] Example 2, such as Figure 8As shown, the user needs to be equipped with reading glasses with a normal diopter of 100 degrees and a second diopter of 50 degrees, that is, the first diopter is +1D, the second diopter is +0.5D, and the double diopter difference is 0.5D. In the figure, from bottom to top are the first lens substrate 101 , the liquid crystal layer 104 , and the second lens substrate 107 . Wherein, the lower surface of the first lens substrate 101 also uses polishing to fine-tune the lens diopter, and the radius of curvature of the upper and lower interfaces of the second lens substrate 107 is the same, and the diopter is 0.

[0069] The optical structure of liquid crystal layer 104 selects the double-convex mirror form for use, α=1, β=1; Adopt because after the liquid crystal material is selected, the birefringence of liquid crystal and the difference of birefringence have just determined, suppose, the first refraction of liquid crystal The index is 1.8,...

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Abstract

The invention discloses a dual-diopter glasses zooming method based on liquid crystal birefraction, which relates to the field of glasses. A pair of dual-diopter glasses comprises a glasses body, dual-diopter lenses, a driving module, a distance measurement module and a master controller; the zooming method comprises the following steps: firstly, using the distance measurement module to acquire distance measurement data of an observed object in real time and send the distance measurement data to the master controller; then, comparing the distance measurement data with a distance measurement threshold value, generating lens driving voltage and controlling the diopter of the lenses. According to the method, voltage is exerted on an electrode to control liquid crystals to rotate and switch the refractive index, so as to achieve the purpose of controlling the diopter of the lenses. The lenses of the glasses provided by the invention have no interval in different areas and are attractive inappearance, and the problems of a prism jumping phenomenon and the like are not caused. The distance measurement module is configured to measure the distance to an observed scene, the switch of the diopter of the lenses can be controlled, and the operation of a user is not needed, so that the convenience of use is improved.

Description

technical field [0001] The invention relates to the field of glasses, in particular to a method for zooming birefringence glasses based on liquid crystal birefringence. Background technique [0002] In the case of vision correction, it is often necessary to have two corrections in one pair of glasses. For example, when old people or presbyopic users read newspapers, they need to use presbyopic glasses (convex lenses) to watch them, and when looking at distant objects, they need to use flat mirrors to watch them. For another example, in adolescents with pseudomyopia, glasses with two degrees are also needed to avoid deepening myopia and correct vision. Users can adjust the degree of glasses by themselves to meet the needs of different scenarios. [0003] In the prior art, there is a bifocal lens (or bifocal lens), which grinds two different refractive powers on the same lens to become a lens in two regions, such as figure 2 shown. Its disadvantages are: it divides one lens...

Claims

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Application Information

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IPC IPC(8): G02C7/08G02F1/1339G02F1/1343G02F1/133G02F1/1337G02F1/137
CPCG02C7/083G02F1/13306G02F1/1337G02F1/1339G02F1/13394G02F1/1343G02F1/137G02F1/13712
Inventor 李梅英
Owner PUTIAN CITY ZHUHUO INFORMATION TECH CO LTD
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