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Pair of refraction and diffraction mixed type light and thin Alvarez zoom glasses

A technology of refraction, mixing, and glasses, which is applied in the field of glasses, can solve problems such as limiting the flexibility of surface shape selection, and achieve the effects of light weight, convenient use, and thin lens thickness

Active Publication Date: 2021-03-26
赵振铎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, harmonic diffraction limits the flexibility of surface shape selection

Method used

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  • Pair of refraction and diffraction mixed type light and thin Alvarez zoom glasses
  • Pair of refraction and diffraction mixed type light and thin Alvarez zoom glasses
  • Pair of refraction and diffraction mixed type light and thin Alvarez zoom glasses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049]A kind of light and thin Alvarez zoom glasses of refraction-diffraction hybrid type, comprise frame, eyeglass and control part; Described each lens is made of two Alvarez lenses of refraction-diffraction hybrid type complementary in surface shape; In order to reduce the thickness of single Alvarez lens, Use the fold-diffraction hybrid surface shape. The central area of ​​the Alvarez lens of the refraction-diffraction hybrid type is a continuous surface shape, and the edge area is a diffraction microstructure, and the distribution area of ​​the continuous surface shape and the diffraction microstructure is determined according to the thickness limit of the zoom lens; the diffraction microstructure is based on The processing conditions and scalar diffraction meet the conditions and design requirements, and the thickness distribution of the diffraction microstructure is preferred; each lens is fixed on the guide rail of the mirror frame through a slider, and one or The two ...

Embodiment 2

[0069] Let n=1.5, if d=0.001m changes 100 degrees, then A=1000m -2 . If the value ranges of x and y are respectively ±0.025m and ±0.015m, and the thickness of a single refraction-diffraction hybrid Alvarez lens is 2mm, and λ=587.5618nm, then when hour, is a continuous surface shape; when hour, is the diffractive microstructure; when hour, is a diffractive microstructure, where mod represents a modulo operation. When m(x,y)=20, the curved surface is shown in Figure 4(a), and the diffraction microstructure in the edge region is shown in Figure 4(b).

[0070] The edge region diffraction microstructure is quantified as 4-step distribution, as shown in Fig. 4(c).

Embodiment 3

[0072] In the above two embodiments, m(x, y) is taken as 20, and it can be seen from Fig. 4(b) that the height of the diffractive microstructure is 23.5 μm, and the width is less than 30 μm.

[0073] Taking the situation shown in Figure (4) as an example, different positive integers m(x, y) can be selected according to the processing conditions.

[0074] Taking the cross-section when y=0 as an example, in the diffraction microstructure, when -0.025m Figure 6 As shown, the width of the diffractive microstructure is greater than the width of the diffractive microstructure in the region of -0.0195m

[0075] Figure 7 Central cross-section of a single hybrid Alvarez lens with different positive integer values ​​selected for different regions. While ensuring easy processing, the thickness of a single Alvarez lens is greatly reduced.

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Abstract

The invention relates to the technical field of glasses, in particular to refraction and diffraction mixed type light and thin Alvarez zoom glasses. The glasses comprise a glasses frame, lenses and acontrol part, wherein each lens is composed of two refractive-diffractive hybrid Alvarez lenses with complementary surface shapes; the center area of the refractive-diffractive hybrid Alvarez lens isa continuous surface shape, while the edge area of the refractive-diffractive hybrid Alvarez lens is a diffraction microstructure, so that the distribution area of the continuous surface shape and thediffraction microstructure is determined according to the thickness limitation of the zoom glasses lens; wherein each lens is fixed on a guide rail of the lens bracket through a sliding block, and one or two of the two refractive-diffractive hybrid Alvarez lenses freely slide on the guide rail of the lens bracket so as to realize the change of the degree. According to the invention, various surface-shaped structures can be selected according to different requirements; therefore, a user can automatically adjust the degree, the degree adjusting range is large, the thickness of the lenses is small, and the whole glasses are light in weight, comfortable to wear and convenient to use.

Description

technical field [0001] The invention relates to the technical field of spectacles, in particular to a refraction-diffraction hybrid thin and light Alvarez zoom spectacles. Background technique [0002] With the increasing popularity of electronic products and the increasing pressure of study and work, there are more and more myopia and hyperopia groups. With the improvement of living standards, people also put forward higher requirements for glasses. They no longer only require vision correction and treatment and health care functions, but also have more requirements for the appearance, portability and zoom function of glasses. For hyperopic patients, it is generally necessary to use a gradient multi-focal lens or multiple pairs of glasses alternately to meet different visual needs. For myopia patients, if the degree of glasses is adjusted according to visual needs, so that the human eye can clearly observe the target in a relaxed state and relieve eye muscle fatigue, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/08G02B3/00G02B27/42
CPCG02C7/081G02B3/0081G02B27/4205
Inventor 赵振铎
Owner 赵振铎
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