Double-diopter spectacles based on birefringence of liquid crystal
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A diopter and birefringence technology, applied in the field of glasses, can solve problems such as unsightly appearance, distance between bifocal lenses, prism jumping, etc., and achieve the effects of avoiding liquid crystal aggregation, improving height control, and improving vision
Inactive Publication Date: 2018-03-13
上海明湖科技有限公司
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The aim is to realize the adjustment of the two focal lengths of spectacle lenses, and to solve the problems of obvious in...
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example 1
[0053] Example 1, such as Figure 6 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.
[0054] 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
[0059] Example 2, such as Figure 7 As 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.
[0060] 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 double-diopter spectacles based on birefringence of liquid crystal and relates to the field of spectacles. The double-diopter spectacles comprise double-diopter lenses for correcting vision; each double-diopter lens comprises a first lens substrate, a second lens substrate, a plurality of supporting columns arranged between the first lens substrate and the second lens substrate, a liquid crystal layer filled between the first lens substrate and the second lens substrate and a liquid crystal laminated frame arranged at the periphery of the liquid crystal layer; a first transparent electrode layer and a second transparent electrode layer are respectively arranged on the inner side of each first lens substrate and the corresponding second lens substrate. According to the double-diopter spectacles disclosed by the invention, the liquid crystal is controlled to rotate and the refractive index is switched by applying voltage to an electrode, and further the aim of controlling the diopter of the lens is achieved. The spectacles provided by the invention have the advantages of no space in different areas, attractiveness in appearance, no prismatic jumping phenomenonand the like and is used for correcting pseudomyopia; a user can switch to high-degree spectacles when observing distant scenes and switch to low-degree spectacles when observing near scenes, so thatthe vision of the user is improved.
Description
technical field [0001] The invention relates to the field of spectacles, in particular to a birefringence spectacles 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 into two are...
Claims
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