Variable-focal-length eyeglasses based on liquid crystal lenses
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A liquid crystal lens and glasses technology, which is applied in the field of zoom glasses, can solve problems such as unsightly appearance, distance between bifocal lenses, and prism jumping, etc., and achieve the effects of balanced refractive index, improved uniformity, and improved vision
Inactive Publication Date: 2018-02-02
河北超视立科技股份有限公司
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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 inter
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example 1
[0048] 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.
[0049] 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
[0054] 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.
[0055] 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 variable-focal-length eyeglasses based on liquid crystal lenses and relates to the field of eyeglasses. Each eyeglass comprises a double-diopter lens for correcting eyesight, the double-diopter lens comprises a first lens substrate, a second lens substrate, a liquid crystal layer which fills the portion between the first lens substrate and the second lens substrate, and a liquid crystal attachment frame which is arranged on the periphery of the liquid crystal layer; a first electrode layer and a second electrode layer are arranged on the inner sides of the first lens substrate and the second lens substrate respectively. According to the variable-focal-length eyeglasses, voltage is applied to electrodes, liquid crystal is controlled to rotate, the refraction rate isswitched, and the aim of controlling the diopter of the lens is achieved. The variable-focal-length eyeglasses have no interval, are attractive in appearance, and have no prism jumping phenomenon, when a user observes distant objects, the eyeglasses can be switched to high-degree eyeglasses, when the user observes near objects, the eyeglasses can be switched to low-degree eyeglasses, and the eyesight of the user is improved. No supporting column is adopted, the influence of the supporting column to the refraction rate is avoided, the refraction rate of all areas can be balanced, and the uniformity of the diopter of all areas of the lenses is effectively improved.
Description
technical field [0001] The invention relates to the field of glasses, in particular to zoom glasses based on liquid crystal lenses. 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 areas, resulting in obvious...
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