Double-sided composite progressive resin lens

Abstract

The utility model relates to a double-sided composite progressive resin lens. The technical problem that an existing astigmatism area is too large is solved. Comprising a lens body with a front surface and a rear surface, the front surface is a convex surface, the rear surface is a concave surface, the rear surface of the lens body is of a progressive structure, the upper part of the front surface of the lens body is of a spherical structure, and the lower part of the front surface of the lens body is an annular zone with the curvature radius changing in a stepped mode. And the girdle area takes the geometric center of the lens body as a circle center and is provided with a plurality of girdle bodies which are sequentially distributed from inside to outside. The lens has the advantages that the astigmatism area of the lens can be reduced and the visual area can be improved through the ring belt body with the curvature radius decreasing progressively on the ring belt area. The curvature difference ratio between the far vision area and the near vision area in the rear surface can be reduced through the annular belt area and the spherical structure on the front surface, the area of useless astigmatism areas on the two sides can be effectively reduced, asthenopia caused by uncomfortable lens wearing is effectively relieved, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lenses, and in particular relates to a double-sided composite progressive resin lens. Background Art

[0002] As people age, the lens of the eye gradually hardens and thickens, and the adjustment ability of the eye muscles also decreases, resulting in a decrease in the eye's ability to zoom. Therefore, objects at close range become blurry, causing obstacles and inconveniences in life. As China's society ages, the demand for vision correction among middle-aged and elderly people is increasing, and they strongly need suitable glasses to facilitate their lives and work. Progressive multifocal lenses are currently the best glasses to meet the vision correction needs of middle-aged and elderly people, and can meet the needs of middle-aged and elderly people with various vision problems.

[0003] However, the structural design of progressive multifocal lenses determines that this type of lens cannot completely avoid deformation astigmatism. Since there is a compound diopter increase between the near and far vision zones, called ADD, the progressive channel gradually changes from the far vision zone diopter at the upper end to the near vision zone diopter at the lower end. Both sides of the progressive channel will produce a certain degree of imaging deformation called astigmatism, and the degree of deformation depends on the amount of added light. The greater the added light in the near vision zone, the more severe the astigmatism induced in the periphery, the larger the astigmatism area on the lens where objects are not clearly seen, and the reduced visible area of ​​the lens, affecting the user experience.

[0004] In order to solve the deficiencies of the prior art, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a double-sided composite progressive resin lens and its manufacturing process [201910856181.0], which includes a hyperopia zone, a myopia zone is arranged in front of the hyperopia zone, a progressive channel is arranged between the hyperopia zone and the myopia zone, the hyperopia zone, the myopia zone and the progressive channel constitute the rear surface of the resin lens, the front surface of the resin lens includes a luminosity zone and a peripheral defocus zone, the peripheral defocus zone is located around the luminosity zone, and a peripheral astigmatism zone is arranged on the rear surface of the resin lens.

[0005] The above solution solves the problem of the existing astigmatism area being too large to a certain extent, but the solution still has many shortcomings. For example, the front surface of the resin lens includes a luminous area and a peripheral defocus area, and the peripheral defocus area is located around the luminous area, resulting in the astigmatism area being too large. Summary of the invention

[0006] The utility model aims to provide a double-sided composite progressive resin lens in view of the above problems.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a double-sided composite progressive resin lens, comprising a lens body having a front surface and a rear surface, wherein the front surface is a convex surface and the rear surface is a concave surface, the rear surface of the lens body has a progressive structure, the upper part of the front surface of the lens body is a spherical structure and the lower part of the front surface of the lens body is an annular zone with a curvature radius that changes in a step-by-step manner, and the annular zone takes the geometric center of the lens body as the center of the circle and has a plurality of annular bodies that are distributed sequentially from the inside to the outside.

[0008] In the above-mentioned double-sided composite progressive resin lens, the annular zone includes a central zone arranged at the lower part of the front surface of the lens body and close to the center of the lens body, and the annular bodies are distributed in sequence from the edge of the central zone toward the circumferential outer edge of the lens body.

[0009] In the above-mentioned double-sided composite progressive resin lens, the central area and each annular zone body are centered on the geometric center of the lens body.

[0010] In the above-mentioned double-sided composite progressive resin lens, the central area is semicircular and the radius of the central area is 10 mm.

[0011] In the above-mentioned double-sided composite progressive resin lens, the spacing between two adjacent annular bands, between the annular band and the edge of the central zone or the circumferential outer edge of the lens body is 3-5 mm, and the curvature radius between two adjacent annular bands decreases by 10 mm.

[0012] In the above-mentioned double-sided composite progressive resin lens, the progressive structure includes a far vision zone arranged on the upper part of the rear surface of the lens body and a near vision zone arranged on the lower part of the rear surface of the lens body, the far vision zone and the near vision zone are connected by a progressive channel, and there are astigmatism zones on both sides of the rear surface of the lens body and the progressive channel is formed between the astigmatism zones.

[0013] In the above-mentioned double-sided composite progressive resin lens, the length of the progressive channel is one of 12 mm, 14 mm, and 18 mm.

[0014] In the above-mentioned double-sided composite progressive resin lens, the lens body is circular, and the diameter of the lens body is 70-85 mm.

[0015] In the above-mentioned double-sided composite progressive resin lens, the composite diopter range of the distance vision zone of the lens is -10.00D to +8.00D.

[0016] In the above-mentioned double-sided composite progressive resin lens, the composite light addition ADD range of the near vision zone is +0.25D to +3.00D.

[0017] Compared with the existing technology, the advantages of the utility model are:

[0018] 1. The annular body with a decreasing curvature radius in the annular zone can reduce the astigmatism area of ​​the lens and increase the visible area.

[0019] 2. The annular zone and spherical structure on the front surface can reduce the curvature difference ratio between the far vision zone and the near vision zone on the back surface, effectively reduce the area of ​​useless astigmatism zones on both sides, effectively reduce visual fatigue caused by lens wearing discomfort, and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a structural schematic diagram of the front surface of the utility model.

[0022] In the figure: lens body 1, front surface 11, back surface 12, progressive structure 2, far vision zone 21, near vision zone 22, progressive channel 23, astigmatism zone 24, spherical structure 3, annular zone 4, annular body 41, central zone 42. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figure 1 , Figure 2 As shown, a double-sided composite progressive resin lens includes a lens body 1 having a front surface 11 and a rear surface 12, wherein the front surface 11 is a convex surface and the rear surface 12 is a concave surface, and the rear surface 12 of the lens body 1 has a progressive structure 2, and the progressive structure 2 can reduce visual fatigue caused by lens wearing discomfort, the upper part of the front surface 11 of the lens body 1 is a spherical structure 3, and the lower part of the front surface 11 of the lens body 1 is an annular zone 4 with a curvature radius that changes in a step-by-step manner, and the annular zone 4 takes the geometric center of the lens body 1 as the center of the circle and has a plurality of annular bodies 41 distributed sequentially from the inside to the outside, and the annular bodies 41 can increase the curvature radius of the lower half of the front surface 11 and increase the degree of curvature.

[0025] Specifically, the annular zone 4 includes a central zone 42 arranged at the lower part of the front surface 11 of the lens body 1 and close to the center of the lens body 1. The annular bodies 41 are distributed in sequence from the edge of the central zone 42 toward the circumferential outer edge of the lens body 1, which can gradually reduce the radius of curvature of the annular zone 4, reduce the area of ​​imaging deformation, and improve the imaging effect.

[0026] The center area 42 and each annular body 41 are centered on the geometric center of the lens body 1 .

[0027] like Figure 1 , Figure 2 As shown, the central area 42 is semicircular and the radius of the central area 42 is 10 mm.

[0028] Furthermore, the spacing between two adjacent annular bodies 41 , between the annular body 41 and the edge of the central area 42 or the circumferential outer edge of the lens body 1 is 3-5 mm, and the radius of curvature between two adjacent annular bodies 41 decreases by 10 mm.

[0029] Among them, the progressive structure 2 includes a far vision zone 21 arranged on the upper part of the rear surface 12 of the lens body 1 and a near vision zone 22 arranged on the lower part of the rear surface 12 of the lens body 1. The far vision zone 21 and the near vision zone 22 are connected by a progressive channel 23. There are astigmatism zones 24 on both sides of the rear surface 12 of the lens body 1 and the progressive channel 23 is formed between the astigmatism zones 24.

[0030] Combination Figure 1 , Figure 2 As shown, the length of the progressive channel 23 is one of 12 mm, 14 mm, and 18 mm.

[0031] The lens body 1 is circular, and the diameter of the lens body 1 is 70-85 mm.

[0032] Specifically, the compound diopter of the far vision zone 21 of the lens ranges from -10.00D to +8.00D.

[0033] Combination Figure 1 As shown, the composite light addition ADD range of the near vision zone 22 is +0.25D to +3.00D.

[0034] The principle of this embodiment is that when the refractive index of the lens body 1 is 1.597 and the Abbe number is 40.0, the radius of curvature of the spherical structure 3 is 199mm. The annular band body 41 starts from the edge of the central area 42, and from the center to the edge of the lens, the width of the first annular band body 41 is 5mm, and the radius of curvature is 189mm; the width of the second annular band body 41 is 5mm, and the radius of curvature is 179mm, and so on, until the edge of the lens. The compound diopter range of the far vision zone 21 is 0.00D, the compound light addition of the near vision zone 22 is +1.50D, that is, the compound diopter of the near vision zone 22 is +1.50D, the length of the progressive channel 23 is 18mm, and the diameter of the lens body 1 is 80mm. As the radius of curvature of the annular band area 4 of the front surface 11 increases, the curvature increases, and the curvature of the near vision zone 22 of the rear surface 12 decreases, the area of ​​the astigmatism zone 24 is reduced by 16.8% compared with the conventional progressive lens with the same diopter.

[0035] When the refractive index of the lens body 1 is 1.553, the Abbe number is 34.0, and the radius of curvature of the spherical structure 3 is 184mm. The annular band 41 starts from the edge of the central area 42, and from the center to the edge of the lens, the width of the first annular band 41 is 3mm, and the radius of curvature is 181mm; the width of the second annular band 41 is 3mm, and the radius of curvature is 178mm, and so on, until the edge of the lens. The compound diopter range of the far vision zone 21 is -3.00D, and the compound light addition of the near vision zone 22 is +2.00D, that is, the compound diopter of the near vision zone 22 is -1.00D, the length of the progressive channel 23 is 14mm, and the diameter of the lens body 1 is 78mm. The radius of curvature of the annular zone 4 of the front surface 11 increases, the degree of curvature increases, the degree of curvature of the near vision zone 22 of the rear surface 12 decreases, and the area of ​​the astigmatism zone 24 is reduced by 21.1% compared with the conventional progressive lens with the same diopter.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0037] Although the terms lens body 1, front surface 11, back surface 12, progressive structure 2, far vision zone 21, near vision zone 22, progressive channel 23, astigmatism zone 24, spherical structure 3, annular zone 4, annular body 41, central zone 42 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A double-sided composite progressive resin lens, comprising a lens body (1) having a front surface (11) and a rear surface (12), wherein the front surface (11) is a convex surface and the rear surface (12) is a concave surface, and the rear surface (12) of the lens body (1) has a progressive structure (2), characterized in that: The upper part of the front surface (11) of the lens body (1) is a spherical structure (3), and the lower part of the front surface (11) of the lens body (1) is an annular zone (4) with a curvature radius that changes in steps, and the annular zone (4) takes the geometric center of the lens body (1) as the center of the circle and has a plurality of annular bodies (41) that are distributed sequentially from the inside to the outside.

2. A double-sided composite progressive resin lens according to claim 1, characterized in that: The annular zone (4) comprises a central zone (42) arranged at the lower part of the front surface (11) of the lens body (1) and close to the center of the lens body (1), and the annular bodies (41) are distributed in sequence from the edge of the central zone (42) toward the circumferential outer edge of the lens body (1).

3. A double-sided composite progressive resin lens according to claim 2, characterized in that: The central area (42) and each annular body (41) are all centered on the geometric center of the lens body (1).

4. The double-sided composite progressive resin lens according to claim 2, characterized in that: The central area (42) is semicircular and has a radius of 10 mm.

5. The double-sided composite progressive resin lens according to claim 2, characterized in that: The spacing between two adjacent annular bands (41), between the annular band (41) and the edge of the central area (42) or the circumferential outer edge of the lens body (1) is 3-5 mm, and the radius of curvature between two adjacent annular bands (41) decreases by 10 mm.

6. The double-sided composite progressive resin lens according to claim 1, characterized in that: The progressive structure (2) comprises a far vision zone (21) arranged on the upper part of the rear surface (12) of the lens body (1) and a near vision zone (22) arranged on the lower part of the rear surface (12) of the lens body (1); the far vision zone (21) and the near vision zone (22) are connected via a progressive channel (23); and astigmatism zones (24) are respectively provided on both sides of the rear surface (12) of the lens body (1), and the progressive channel (23) is formed between the astigmatism zones (24).

7. The double-sided composite progressive resin lens according to claim 6, characterized in that: The length of the progressive channel (23) is one of 12 mm, 14 mm and 18 mm.

8. The double-sided composite progressive resin lens according to claim 1, characterized in that: The lens body (1) is circular, and the diameter of the lens body (1) is 70-85 mm.

9. The double-sided composite progressive resin lens according to claim 6, characterized in that: The compound diopter of the far vision zone (21) of the lens ranges from -10.00D to +8.00D.

10. The double-sided composite progressive resin lens according to claim 6, characterized in that: The composite light addition ADD range of the near vision zone (22) is +0.25D to +3.00D.

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