CN218601621U - Wide-angle double-lens element - Google Patents

Abstract

The utility model provides a wide-angle bifocal lens element. The wide-angle bifocal lens element includes a lens element body. The lens element body is divided into a first lens element body and a second lens element body by a horizontal axis. The first lens element body The lens element body is located above the second lens element body; the first lens element body is a high beam area, the second lens element body is an astigmatism area and a near beam area, and the astigmatism area is located on a side close to the horizontal axis , the astigmatism area includes a first astigmatism area and a second astigmatism area, the first astigmatism area and the second astigmatism area are distributed symmetrically with respect to the vertical axis, and the first astigmatism area and the second astigmatism area are respectively defined by the upper arc surrounded by a line and a lower arc extending inwardly from the edge of the second lens element body and intersecting. The wide-angle bifocal lens element has a wide viewing angle and can eliminate the image jump phenomenon of common bifocal lenses.

Description

A wide-angle bifocal lens element

technical field

The utility model belongs to the technical field of glasses, in particular to a wide-angle bifocal lens element.

Background technique

When a person's eye adjustment ability weakens due to age, it is necessary to perform vision correction for distance vision and near vision separately. Very inconvenient. Therefore, grinding two different diopters on the same lens to form a lens with two regions, that is, bifocal or bifocal glasses, has become the key to solving this type of problem at present. However, the hyperopia focus and myopia focus of the current bifocal glasses jump, and the hyperopia focus and myopia focus cannot match the human eye angle of view well, and the wearing feeling is very uncomfortable, and further development and preparation are still needed.

CN202166792U discloses a bifocal lens suitable for adolescents with ametropia, including a main sheet and a sub-sheet, the main sheet is a structure for looking far away, and the sub-chip is a part for seeing near, and the bifocal lens is aspherical as a whole A lens, the surface of the bifocal lens is covered with a film layer, and the film layer includes an anti-wear film, an anti-reflection film and an anti-fouling film. Myopia patients use the lens to increase the ciliary muscle strength of the eye and expand the adjustment reserve, so as to improve the vision of the ametropic eye and reduce its diopter.

CN111948835A discloses a kind of invisible bifocal lens, which includes structures such as a convex spherical surface, an outer circle, an upper optical area, and a lower optical area. The convex spherical surface, outer circle, upper optical area, and lower optical area form an integrated lens. The outer periphery of the convex spherical surface is provided with an outer circle, and the upper light area is arranged at the upper end of the lower light area. The bifocal lens is composed of arc surfaces with the same radius, and the combination line of the upper and lower light areas cannot be seen on the outside, and there is no sudden bulge in the middle of the lens. There is almost no difference in appearance from ordinary lenses, and there will be no strangeness a feeling of.

Based on the above studies, it can be seen that bifocals can meet the needs of people for both distance vision and near vision, but there are still problems such as image jumping, poor visual effects and low wearing comfort. Therefore, it is an urgent problem to be solved at present to develop a kind of bifocal lens, which has wider near vision and far vision vision and improves wearing comfort.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of the utility model is to provide a wide-angle bifocal lens element. The wide-angle bifocal lens element can eliminate the image jump phenomenon of ordinary bifocal lenses, and improve the wearer's visual effect and wearing comfort.

For this purpose, the utility model adopts the following technical solutions:

In a first aspect, the utility model provides a wide-angle bifocal lens element, the wide-angle bifocal lens element includes a lens element body, and the lens element body is divided into a first lens element body and a second lens element body by a horizontal axis, The first lens element body is located above the second lens element body;

The first lens element body is a high beam area, the second lens element body is an astigmatism area and a low beam area, the astigmatism area is located on a side close to the horizontal axis, and the astigmatism area includes a first astigmatism area and a second astigmatism area Two astigmatism areas, the first astigmatism area and the second astigmatism area are symmetrically distributed with respect to the vertical axis, the first astigmatism area and the second astigmatism area are respectively surrounded by an upper arc and a lower arc, and the upper arc a line and a lower arc respectively extending inwardly from and intersecting an edge of the second lens element body;

Wherein, the horizontal axis refers to the horizontal meridian passing through the center of the lens element body, the vertical axis refers to the vertical axis perpendicular to the horizontal axis, the lower arc faces the horizontal axis, and the orientation of the upper arc and the lower arc on the contrary.

The high light area in the wide-angle bifocal lens element involved in the utility model is used to correct the vision defect of the wearer when looking far, and it is located in the upper half of the lens element body, and the near light area and the astigmatism area are located in the lower part of the lens element body In the half part, the astigmatism area rapidly transitions from the high beam area to the low beam area in the center of the lens element body, and the astigmatism is compressed in the two sides and distributed in a linear shape. The wide-angle bifocal lens element has wide near and far vision, eliminates the image jump phenomenon of ordinary bifocal lenses, improves the patient's visual effect and wearing comfort, and can also make it around the center point according to the left and right eyes of the lens. The rotation of 2-8° makes the vision of the low beam area wider, while the high beam area is hardly affected.

Preferably, the area of the astigmatism region accounts for 1/2-2/3 of the body area of the second lens element, for example, it can be 1/2 or 2/3, etc., but it is not limited to the listed values, and no The same applies to other values.

Preferably, the diopter range of the high beam area is -20.00-15.00D.

The -20.00-15.00D can be -20.00D, -15.00D, -10.00D, -5.00D, 0.00D, 5.00D, 10.00D or 15.00D, etc., but not limited to the listed values, within this range Other values not listed also apply.

Preferably, the diopters of the high beam area are distributed uniformly in a spherical way.

The distribution in the spherical mode means that the luminosity in the entire distance area remains constant at a fixed value.

Preferably, the diopter of the high light area is centered at the position where the center of the lens element body moves upwards vertically and gradually decreases toward the edge of the lens element body according to the law of aspheric variation.

The law of the aspheric change means that the luminosity gradually changes from the center to the edge in a gradually changing law from the position after the upward movement.

Preferably, the distance of the vertical upward movement is 4-8mm.

The 4-8mm can be 4mm, 4.5mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm or 8mm, etc., but not limited to the listed values, other values not listed in this range The same applies.

Preferably, the low beam area has an additional luminosity of positive luminosity relative to the high beam area.

Preferably, the range of the additional luminosity is 0.50-4.00D.

The 0.50-4.00D can be 0.50D, 0.75D, 1.00D, 1.25D, 1.50D, 1.75D, 2.00D, 2.25D, 2.50D, 2.75D, 3.00D, 3.25D, 3.50D, 3.75D Or 4.00D, etc., but not limited to the listed values, other values not listed within this range are also applicable.

Preferably, the range of the additional luminosity is 1.00-3.00D.

Preferably, said wide-angle bifocal lens elements are distributed on the front or back surface of the lens.

The front surface is the surface away from the eye when the lens is completely installed and worn, and the rear surface is the surface close to the eye when the lens is completely installed and worn.

Compared with the prior art, the utility model has the beneficial effects as follows: the utility model provides a wide-angle bifocal lens element, the high beam area and the low beam area both have a wide viewing angle, and the astigmatism area is compressed and distributed in a band shape , can eliminate the image jump phenomenon of ordinary bifocal lenses, and at the same time can realize the center shift processing of the lens elements. According to the left and right eyes of the lens, the lens elements can be rotated 2-8° around the center point, so that the field of vision in the low beam area is wider , while the high beam area is hardly affected, it is suitable for processing a variety of large-frame glasses.

Description of drawings

Fig. 1 is the structural representation of the wide-angle bifocal lens element that the utility model relates to;

Wherein, 1 is the high beam area, 2 is the low beam area, 31 is the first astigmatism area, and 32 is the second astigmatism area;

Fig. 2 is a diopter distribution curve diagram of the wide-angle bifocal lens element involved in the utility model;

Fig. 3 is a curve diagram of the astigmatism distribution of the wide-angle bifocal lens element involved in the present invention.

Detailed ways

It should be understood that in the description of the present invention, the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" , "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device or element Must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature.

The structure diagram of the wide-angle bifocal lens element involved in the utility model is shown in Figure 1, wherein 1 is the high beam area, 2 is the low beam area, 31 is the first astigmatism area, and 32 is the second astigmatism area. The technical solutions of the present utility model are further described below through specific embodiments.

Example 1

This embodiment provides a wide-angle bifocal lens element, the wide-angle bifocal lens element includes a lens element body, the lens element body is divided into a first lens element body and a second lens element body by a horizontal axis, the first lens element body The lens element body is located above the second lens element body;

The first lens element body is a high beam area 1, the second lens element body is an astigmatism area and a low beam area 2, the astigmatism area is located on a side close to the horizontal axis, and the astigmatism area includes a first astigmatism area 31 and the second astigmatism area 32, the first astigmatism area 31 and the second astigmatism area 32 are symmetrically distributed on the basis of the vertical axis, and the first astigmatism area 31 and the second astigmatism area 32 are respectively formed by an upper arc and a lower arc surrounded by lines, the upper arc and the lower arc respectively extend inward from the edge of the second lens element body and intersect;

Wherein, the horizontal axis refers to the horizontal meridian passing through the center of the lens element body, the vertical axis refers to the vertical axis perpendicular to the horizontal axis, the lower arc faces the horizontal axis, and the orientation of the upper arc and the lower arc on the contrary.

The area of the astigmatism area accounts for 1/2 of the body area of the second lens element, the value of the diopter of the high beam area 1 is -10.00D, and the diopter of the high beam area 1 is kept consistent in spherical light distribution. Compared with the high beam area 1 , the low beam area 2 has a positive additional luminosity, and the value of the additional luminosity is 1.00D. The wide-angle bifocal lens elements are distributed on the front surface of the lens, and the front surface is the surface away from the eye when the lens is completely installed and worn.

Both the high beam area 1 and the low beam area 2 in the wide-angle bifocal lens element provided by this embodiment have wide viewing angles, and the astigmatism area is compressed and distributed in a band shape, which can eliminate the image jump phenomenon of ordinary bifocal lenses.

Example 2

This embodiment provides a wide-angle bifocal lens element, the wide-angle bifocal lens element includes a lens element body, the lens element body is divided into a first lens element body and a second lens element body by a horizontal axis, the first lens element body The lens element body is located above the second lens element body;

The first lens element body is a high beam area 1, the second lens element body is an astigmatism area and a low beam area 2, the astigmatism area is located on a side close to the horizontal axis, and the astigmatism area includes a first astigmatism area 31 and the second astigmatism area 32, the first astigmatism area 31 and the second astigmatism area 32 are symmetrically distributed on the basis of the vertical axis, and the first astigmatism area 31 and the second astigmatism area 32 are respectively formed by an upper arc and a lower arc surrounded by lines, the upper arc and the lower arc respectively extend inward from the edge of the second lens element body and intersect;

Wherein, the horizontal axis refers to the horizontal meridian passing through the center of the lens element body, the vertical axis refers to the vertical axis perpendicular to the horizontal axis, the lower arc faces the horizontal axis, and the orientation of the upper arc and the lower arc on the contrary.

The area of the astigmatism area accounts for 1/2 of the body area of the second lens element, the value of the diopter of the high beam area 1 is -5.00D, and the diopter of the high beam area 1 is kept consistent in spherical light distribution. Compared with the high beam area 1 , the low beam area 2 has a positive added luminosity, and the value of the added luminosity is 2.00D. The wide-angle bifocal lens elements are distributed on the rear surface of the lens. The rear surface is the surface close to the eye side when the lens is completely installed and worn.

Both the high beam area 1 and the low beam area 2 in the wide-angle bifocal lens element provided by this embodiment have wide viewing angles, and the astigmatism area is compressed and distributed in a band shape, which can eliminate the image jump phenomenon of ordinary bifocal lenses.

Example 3

This embodiment provides a wide-angle bifocal lens element, the wide-angle bifocal lens element includes a lens element body, the lens element body is divided into a first lens element body and a second lens element body by a horizontal axis, the first lens element body The lens element body is located above the second lens element body;

The first lens element body is a high beam area 1, the second lens element body is an astigmatism area and a low beam area 2, the astigmatism area is located on a side close to the horizontal axis, and the astigmatism area includes a first astigmatism area 31 and the second astigmatism area 32, the first astigmatism area 31 and the second astigmatism area 32 are symmetrically distributed on the basis of the vertical axis, and the first astigmatism area 31 and the second astigmatism area 32 are respectively formed by an upper arc and a lower arc surrounded by lines, the upper arc and the lower arc respectively extend inward from the edge of the second lens element body and intersect;

Wherein, the horizontal axis refers to the horizontal meridian passing through the center of the lens element body, the vertical axis refers to the vertical axis perpendicular to the horizontal axis, the lower arc faces the horizontal axis, and the orientation of the upper arc and the lower arc on the contrary.

The area of the astigmatism area accounts for 2/3 of the area of the second lens element body, and the value of the diopter of the high beam area 1 is 5.00D. The position after the center is moved up vertically by 5mm is the center, and it gradually decreases toward the edge of the lens element body. Compared with the high beam area 1 , the low beam area 2 has a positive added luminosity, and the value of the added luminosity is 0.50D. The wide-angle bifocal lens elements are distributed on the front surface of the lens. The front surface is the surface away from the eye when the lens is completely installed and worn.

Both the high beam area 1 and the low beam area 2 in the wide-angle bifocal lens element provided by this embodiment have wide viewing angles, and the astigmatism area is compressed and distributed in a band shape, which can eliminate the image jump phenomenon of ordinary bifocal lenses.

Example 4

This embodiment provides a wide-angle bifocal lens element, the wide-angle bifocal lens element includes a lens element body, the lens element body is divided into a first lens element body and a second lens element body by a horizontal axis, the first lens element body The lens element body is located above the second lens element body;

The first lens element body is a high beam area 1, the second lens element body is an astigmatism area and a low beam area 2, the astigmatism area is located on a side close to the horizontal axis, and the astigmatism area includes a first astigmatism area 31 and the second astigmatism area 32, the first astigmatism area 31 and the second astigmatism area 32 are symmetrically distributed on the basis of the vertical axis, and the first astigmatism area 31 and the second astigmatism area 32 are respectively formed by an upper arc and a lower arc surrounded by lines, the upper arc and the lower arc respectively extend inward from the edge of the second lens element body and intersect;

Wherein, the horizontal axis refers to the horizontal meridian passing through the center of the lens element body, the vertical axis refers to the vertical axis perpendicular to the horizontal axis, the lower arc faces the horizontal axis, and the orientation of the upper arc and the lower arc on the contrary.

The area of the astigmatism area accounts for 2/3 of the area of the second lens element body, the diopter of the high beam area 1 is 5.00D, and the diopter of the high beam area 1 is kept consistent in spherical light distribution. Compared with the high beam area 1 , the low beam area 2 has an additional luminosity of positive luminosity. The additional luminosity is 2.00D. The wide-angle bifocal lens elements are distributed on the front surface of the lens. The front surface is the surface away from the eye when the lens is completely installed and worn.

The diopter distribution and astigmatism distribution curves were made for the wide-angle bifocal lens elements, and the results are shown in Figures 2-3. According to the diopter distribution curve of the wide-angle bifocal lens element body in Figure 2, it can be seen that the high-beam area 1 can cover the first lens element body, and the field of view is wide. After a distance of 4mm, the myopia 5.0D in the high-beam area 1 can be quickly Completely transition to the low beam zone 2, which has 2.00D additional luminosity relative to the high beam zone 1, and has a wide field of vision. According to the astigmatism distribution curve of the wide-angle bifocal lens element body in Figure 3, it can be seen that the lens element body is in the central area of the transition from the high beam area 1 to the low beam area 2, and its astigmatism is stable within 0.12D, avoiding the occurrence of image jump , maintaining the continuity of visual objects.

The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto, and those skilled in the art should understand that any skilled person in the technical field shall Within the technical scope disclosed in the new model, easily conceivable changes or replacements all fall within the scope of protection and disclosure of the present utility model.

Claims (10)

1. A wide-angle bifocal lens element comprising a lens element body divided by a horizontal axis into a first lens element body and a second lens element body, the first lens element body being above the second lens element body;

the first lens element body is a high beam area, the second lens element body is an astigmatism area and a low beam area, the astigmatism area is positioned on one side close to the horizontal axis, the astigmatism area comprises a first astigmatism area and a second astigmatism area, the first astigmatism area and the second astigmatism area are symmetrically distributed by taking the vertical axis as a reference, the first astigmatism area and the second astigmatism area are respectively enclosed by an upper arc line and a lower arc line, and the upper arc line and the lower arc line respectively extend inwards from the edge of the second lens element body and intersect;

wherein the horizontal axis refers to a horizontal meridian passing through the center of the lens element body, the vertical axis refers to a vertical axis perpendicular to the horizontal axis, the downward arc faces the horizontal axis, and the upward arc faces opposite the downward arc.

2. A wide-angle bifocal lens element according to claim 1, wherein the area of the astigmatic region occupies 1/2-2/3 of the area of the second lens element body.

3. A wide angle bifocal lens element according to claim 1, wherein the distance zone has a diopter ranging from-20.00 to 15.00 diopters.

4. A wide angle bifocal lens element according to claim 3, wherein the diopter distribution of the distance zone remains consistent in a spherical manner.

5. A wide-angle bifocal lens element according to claim 3, wherein the diopter of the high-beam zone decreases toward the edge of the lens element body, according to the law of aspheric change, centering around the position where the center of the lens element body has moved vertically upward.

6. A wide-angle bifocal lens element according to claim 5, wherein the distance of vertical upward shift is 4-8mm.

7. A wide-angle bifocal lens element according to claim 1, wherein the low beam zone has a plus power of positive power relative to the high beam zone.

8. A wide-angle bifocal lens element according to claim 7, wherein the add power is in the range of 0.50-4.00D.

9. A wide-angle bifocal lens element according to claim 8, wherein the add power is in the range of 1.00-3.00D.

10. The wide angle bifocal lens element of claim 1, wherein the wide angle bifocal lens element is distributed on an anterior surface or a posterior surface of the lens;

the front surface is the surface of the lens which is far away from the eye when the lens is worn after being completely installed;

the back surface is the surface of the lens that is close to the side of the eye when worn after the lens is completely installed.

Images