CN218866246U

CN218866246U - Double-sided aspheric lens and glasses thereof

Info

Publication number: CN218866246U
Application number: CN202320088195.4U
Authority: CN
Inventors: 余浩墨; 崔磊; 张慧星
Original assignee: Hunan Photosynthesis Commerce And Trade Co ltd; Suzhou Mingshi Optical Technology Co ltd
Current assignee: Hunan Photosynthesis Commerce And Trade Co ltd; Suzhou Mingshi Optical Technology Co ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-04-14
Anticipated expiration: 2033-01-30

Abstract

The utility model relates to a two-sided aspheric surface lens and glasses thereof. The inner surface of the lens is used as a main design surface for improving the image quality and thinning the lens, and the outer surface of the lens is used as an astigmatism buffer design surface. The single-sided positive focal power of the inner surface gradually reduces from the center to the edge, and the astigmatism of each peripheral point in the 35-degree view angle is lower than 85% of the variation of the focal power; the single-sided negative focal power of the outer surface from the center to the edge is also gradually reduced, the astigmatism of each point in a 35-degree field angle is larger than 110% of the variation of the focal power, and after the two-sided astigmatism is compensated, the ratio of the astigmatism of each point on the periphery of the lens to the variation of the focal power is lower than 75%. The utility model provides a lens when thickness keeps equal flat thin, through the increase of main design face astigmatism optimization and buffering face astigmatism, make the peripheral astigmatism of surface form the reverse offset of best form inside and outside the lens to reduce the astigmatism in the 35 degrees angles of vision of lens, assembly mirror holder rear glasses wear the comfort and have obvious promotion.

Description

Double-sided aspheric lens and glasses thereof

Technical Field

The utility model relates to an aspheric surface lens technical field, in particular to when lens attenuate, optimize astigmatic two-sided aspheric surface lens and glasses thereof.

Background

Traditional aspheric surface designs, whether single-sided or double-sided, will give priority to lens wear mirror image difference optimization. Off-axis aberrations including defocus, oblique astigmatism, curvature of field, distortion and the like generated when an object is obliquely viewed are eliminated. The image quality of the batch-manufactured aspheric lens manufactured by the mold designed by the method is obviously improved when the batch-manufactured aspheric lens is imaged according to an ideal model of human eyes. The problem is that this design method does not take into account the actual aberrations of the human eye system and the physiological dynamic mechanisms of the human eye. An aspheric lens with good aberration optimization theoretically has an unsatisfactory actual imaging effect due to interference factors such as the inclination angle of a spectacle frame, wearing habits, high-order aberration of a human eye system and the like. In particular, the compensation astigmatism for optimizing the oblique astigmatism may form irregular astigmatism in a dynamic system of a human eye after being disturbed by various factors, so that the peripheral definition and comfort of the lens are reduced rather than those of a spherical lens. This risk is more likely to exist for double-sided aspheric lenses where the amount of thinning is relatively large, and the power and cylindrical power compensation is also relatively large.

Disclosure of Invention

The utility model discloses to the not enough that prior art exists, provide one kind in the attenuate lens, carry out the two-sided aspheric surface lens and the glasses that control to the compensation astigmatism value of 35 degrees field angle within ranges of lens.

In order to achieve the above object, the technical solution of the present invention is to provide a double-sided aspheric spectacle lens, comprising an inner surface and an outer surface, wherein the single-sided negative focal power of the inner surface of the spectacle lens gradually decreases from the center to the edge, and the astigmatism of each point in the 35-degree angle of view of the inner surface of the spectacle lens is less than 85% of the variation of the focal power; the single-sided negative focal power of the outer surface of the lens is gradually reduced from the center to the edge, and the astigmatism of each point in the 35-degree field angle of the outer surface of the lens is more than 110% of the variation of the focal power; the variation of the average focal power of the lens from the center to the position of the 35-degree field angle is 8% -15% of the central focal power; the ratio of astigmatism of each point on the periphery of the lens to the variation of the focal power is less than 75%.

A two-sided aspheric surface lens, its lens from the center to the focal power of 35 degrees angles of vision change be at the uniform velocity degressive, even accelerate degressive, at the uniform velocity and even accelerate to mix in degressive one kind.

The utility model discloses technical scheme still relates to a glasses, glasses include as in any one of above technical scheme two-sided aspheric surface lens.

The utility model provides a pair of two-sided aspheric surface lens and glasses thereof, the lens body is the aspheric surface design including inside and outside two refracting surfaces, and the internal surface improves the main design face with the lens attenuate as the image quality, and the surface is astigmatism buffering design face to offset the irregular astigmatism that brings when main design face optimizes the image quality. The thickness reduction ratio of the lens at the 70 mm aperture is not less than 8% compared with the spherical lens with the same refractive index, the same luminosity and the same front and back curvature ratio.

The front and back curves of the lens are manufactured into a finished product by thermosetting molding after resin is poured into a glass mold or a blank is poured into a front surface glass mold and then a rear surface free-form surface is ground to manufacture a finished lens, and the finished lens is arranged in a spectacle frame to obtain the spectacle which can reduce the thickness of the lens and control the compensation astigmatism value within the 35-degree field angle range of the lens.

Compared with the prior art, the utility model discloses beneficial effect as follows: the utility model aims at providing a two-sided aspheric surface lens and glasses that compensation astigmatism value to lens 35 degrees field angle within ranges carries out control. The lens is designed by mutual offset of two surfaces, so that the compensation astigmatism of the lens in a 35-degree angle of view is reduced to within 75% of the addition light, the thinning of the lens can be larger besides the advantages of the traditional double-lens system such as thin type, the 70 mm caliber of the lens is relative to the same refractive index, and compared with the spherical lens with the same luminosity and the same front and back curvature ratio, the thickness thinning proportion is not lower than 8%. Meanwhile, the wearing comfort of the double-sided aspheric surface with faster focal power change is obviously improved.

Drawings

Fig. 1, 2, 3 and 4 are respectively a focal power distribution diagram of a main design surface, a focal power distribution diagram of an astigmatism buffering design surface, a focal power distribution diagram of a lens after superposition of the main design surface and the astigmatism buffering design surface, and a focal power diagram of a traditional double-sided aspheric design lens provided in embodiment 1 of the present invention;

fig. 5 is a schematic diagram comparing the thickness of the lens obtained in the embodiment 1 of the present invention with that of the lens obtained by the conventional design;

in the figure, 1. The lens provided in the technical proposal of the embodiment 1; 2. lenses designed as conventional aspheric surfaces;

fig. 6, 7, 8 and 9 are respectively a focal power distribution diagram of the main design surface, a focal power distribution diagram of the astigmatism buffering design surface, a focal power distribution diagram of the lens after superposition of the main design surface and the astigmatism buffering design surface, and a focal power diagram of the conventional double-sided aspheric design lens provided by embodiment 2 of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example one

The embodiment provides a two-sided aspheric surface lens, and the lens body includes two inside and outside refracting surfaces, and two refracting surfaces are the aspheric surface design, two aspheric surfaces divide into internal surface and surface, and the internal surface improves the main design face with the lens attenuate as the image quality, and the surface is astigmatism buffering design face to offset the main irregular astigmatism that brings when involving the face optimization image quality.

The single-sided positive focal power of the main design surface of the lens is gradually reduced from the center to the edge, the astigmatism of each point on the inner periphery of a 35-degree visual angle is lower than 85% of the variation of the focal power, the single-sided negative focal power of the astigmatism buffer design surface of the lens is also gradually reduced from the center to the edge, the astigmatism of each point in the 35-degree visual angle is larger than 110% of the variation of the focal power, and after the astigmatism of the two surfaces is fully compensated, the ratio of the astigmatism of each point on the periphery of the lens to the variation of the focal power is lower than 75%. The variation of the mean focal power of the lens from the center to the angular position of the field of view of 35 degrees is between 8% and 15% of the central focal power.

According to the lens structure provided by the utility model, this embodiment takes the lens with focal power of-4.50D as an example, the refractive index of the lens is 1.56, the central focal power of the inner surface of the main design surface is-6.50, the peripheral focal power is-5.90D, and the focal power distribution schematic diagram of the main design surface is shown in the attached figure 1.

The central focal power of the astigmatism buffer design surface on the outer surface of the lens is 2.00D, the peripheral focal power is 1.80D, and the focal power distribution of the astigmatism buffer design surface is schematically shown in FIG. 2.

The focal power of the whole lens surface is formed by overlapping the main design surface and the astigmatism buffering design surface, the focal power of the lens changes from-4.50D to-4.10D from the center to the edge of the lens, and a schematic diagram of the focal power distribution of the lens after overlapping the main design surface and the astigmatism buffering design surface is shown in FIG. 3.

In this example, a lens having the same parameters obtained using a conventional double-sided aspherical design was used as a comparative example, and the power profile of the lens was as shown in fig. 4.

The schematic thickness diagrams of the two lenses provided in this embodiment are respectively shown in fig. 5. As can be seen from fig. 5, the edge thickness reduction of the lens 1 provided by the technical solution of the present embodiment is 0.93, and compared with the edge thickness reduction of the lens 2 designed by the conventional aspheric surface being 0.81, the reduction ratio is 14.8%.

The astigmatism values of the two lenses over a 35 ° field of view are shown in table one.

Watch 1

Can find out from table one, the utility model discloses a lens is in 35 visual angles, and astigmatism value all is less than the lens that traditional aspheric surface design method designed, and in 35 visual angles departments, the utility model discloses a astigmatism value of lens only is 0.28D, for 70% that the focal power changes, compares traditional aspheric surface design and has reduced 30%.

And the front and back curves of the lens are manufactured into a finished product through thermosetting molding after resin is poured into a glass mold, or a blank is manufactured through pouring into a front surface glass mold, and then a rear surface free-form surface is ground to manufacture a finished lens which is arranged on a spectacle frame to obtain the spectacles.

Example two

This embodiment provides a two-sided aspheric lens that a focal power is-2.00D, the lens refracting index is 1.56, adopt the utility model discloses the method design, lens owner design face central focal power is-4.50D, the marginal focal power is-4.10D, its law of change is as shown in fig. 6, astigmatism buffering design face central focal power is 2.50D, marginal focal power is 2.30D, its law of change is as shown in fig. 7, then the focal power of whole face is formed by main design face and the superposition of astigmatism buffering design face, its focal power is from lens center to marginal by-2.00D change to-1.80D, the focal power distribution is as shown in fig. 8, use traditional two-sided aspheric surface design method to design out the lens of the same parameter, its focal power distribution is as shown in fig. 9, the lens marginal thickness of the utility model design in this embodiment is reduced thickness and is 1.22, the marginal thickness of the lens that traditional aspheric surface method designed reduces the thickness and reduces the thin the volume and is 1.07, the reduction proportion is 14%.

The values of astigmatism of the two lenses over a 35 ° field of view are shown in table two.

Watch two

Can find out from the table, the utility model discloses a lens is in 35 visual angles, and astigmatism value all is less than the lens that traditional aspheric surface design method designed, and in 35 visual angles departments, the utility model discloses a astigmatism value of lens only is 70% that 0.14D changes for the focal power, compares traditional aspheric surface design and has reduced 13.7%.

The utility model provides a lens is through the design of offsetting each other on two sides for lens compensation astigmatism in the 35 degrees angle of vision reduces to adding light within 75%, makes the lens can also make the attenuate bigger simultaneously outside possessing traditional double-phase non advantages such as slim, wears the comfort and has obvious promotion.

Claims

1. A double-sided aspheric ophthalmic lens comprising an inner surface and an outer surface, characterized in that: the single-sided negative focal power of the inner surface of the lens is gradually reduced from the center to the edge, and the astigmatism of each point in the 35-degree field angle of the inner surface of the lens is lower than 85% of the variation of the focal power; the single-sided negative focal power of the outer surface of the lens is gradually reduced from the center to the edge, and the astigmatism of each point in the 35-degree field angle of the outer surface of the lens is more than 110% of the variation of the focal power; the variation of the average focal power of the lens from the center to the position of the 35-degree field angle is 8% -15% of the central focal power; the ratio of astigmatism of each point on the periphery of the lens to the variation of the focal power is less than 75%.

2. A double-sided aspheric ophthalmic lens as claimed in claim 1, characterized in that: the focal power change of the lens from the center to the 35-degree angle of vision is one of constant speed decreasing, uniform acceleration decreasing, constant speed and uniform acceleration mixing decreasing.

3. An eyewear, characterized by: comprising the double-sided aspherical ophthalmic lens according to any of claims 1 to 2.