Tapered dual-light resin lens

Abstract

The utility model relates to a gradual change type double-light resin lens. The technical problem that an obvious bending change interface exists between an existing lens body and a sub-lens is solved. Comprising a lens body, the inner surface of the lens body is a concave surface, the outer surface of the lens body is a convex surface, a sub-lens is arranged on the outer surface of the lens body, and the outer surface of the lens body and the sub-lens are in smooth transition through an annular belt part with gradually-changed diopter. The lens has the advantages that the ring belt part is arranged between the lens body and the sub-lens, so that the surfaces of the lens body and the sub-lens are gradually transited, and the surface of the lens body and the surface of the sub-lens are prevented from mutation, so that the surface of the lens is attractive.

Description

Technical Field

[0001] The utility model belongs to the technical field of resin lenses, and in particular relates to a gradual change bifocal resin lens. Background Art

[0002] A bifocal resin lens is a lens suitable for older people. It has a sub-lens added to the outer surface of the lens. The sub-lens protrudes from the lens surface and has a different diopter from the lens body. The sub-lens is used for near vision, while the lens body is used for far vision. In the prior art, during the preparation of bifocal resin lenses, firstly, a glass mold of the lens body is engraved, the sub-lens mold is made on the body mold, and then the molds are closed, the lens monomer is cast, and the bifocal lens is obtained after curing. However, since the sub-lens of this bifocal lens protrudes from the surface of the lens body, the curvature of the sub-lens is greater than that of the lens body, and there is an obvious curvature change interface between the lens body and the sub-lens, which makes the lens surface look unsightly. Summary of the invention

[0003] The purpose of the utility model is to provide a gradual change bifocal resin lens in view of the above problems.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions: a gradient bifocal resin lens, comprising a lens body, wherein the inner surface of the lens body is concave and the outer surface is convex, a sub-lens is arranged on the outer surface of the lens body, and a ring belt portion with a gradient diopter is used to smoothly transition between the outer surface of the lens body and the sub-lens. The ring belt portion is used to smoothly transition between the surface of the lens body and the sub-lens, avoiding the presence of an obvious boundary between the sub-lens and the lens body, thereby making the lens beautiful and elegant in appearance.

[0005] In the above-mentioned gradient bifocal resin lens, the outer surface of the annular portion is tangent to the outer surface of the lens body and the outer surface of the sub-lens, respectively, so that the surfaces of the lens body and the sub-lens are gradually transitioned, thereby making the lens surface more beautiful.

[0006] In the above-mentioned progressive bifocal resin lens, the width of the annular zone is 5.0 to 10.0 mm.

[0007] In the above-mentioned progressive dual-light resin lens, the annular band portion has an annular band outer circle located on the lens body and an annular band inner circle located on the circumferential outer side of the sub-lens bottom, the annular band outer circle and the annular band inner circle are both annular, and the annular band outer circle is located on the circumferential outer side of the annular band inner circle. The annular band portion is connected to the lens body through the annular band outer circle, and the annular band portion is connected to the lens body through the annular band inner circle.

[0008] In the above-mentioned progressive bifocal resin lens, the radial distance between the outer circle of the annular zone of the annular zone portion and the geometric center of the lens body is 1.0 to 5.0 mm.

[0009] In the above-mentioned progressive bifocal resin lens, the distance between the geometric center of the sub-lens and the outer surface of the lens body is 3.5 to 6.5 mm.

[0010] In the above-mentioned progressive bifocal resin lens, the distance between the geometric center of the sub-lens and the geometric center of the lens body is 15.0-20.0 mm.

[0011] In the above-mentioned progressive dual-light resin lens, the diopter change value of the annular zone portion in the radial direction per millimeter is 0.15D. The diopter of the outer circle of the annular zone increases by 0.15D per millimeter in the radial direction of the inner circle of the annular zone.

[0012] In the above-mentioned progressive bifocal resin lens, the diopter difference (ADD) between the sub-lens and the lens body is +0.50D to +3.00D.

[0013] In the above-mentioned progressive bifocal resin lens, the lens body is circular and has a diameter of 65.0 to 80.0 mm.

[0014] Compared with the existing technology, the advantages of the utility model are:

[0015] The device sets an annular belt part between the lens body and the sub-mirror, so that the surfaces of the two are gradually transitioned, avoiding sudden changes between the surface of the lens body and the surface of the sub-mirror, thereby making the lens surface very beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural sectional view of the utility model.

[0018] Figure 3 It is the front view of the utility model.

[0019] In the figure: lens body 1, sub-lens 2, annular portion 3, annular outer circle 31, annular inner circle 32. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] like Figure 1-3As shown, a gradient bifocal resin lens comprises a lens body 1, the inner surface of the lens body 1 is a concave surface and the outer surface is a convex surface, a sub-lens 2 is arranged on the outer surface of the lens body 1, and a ring belt portion 3 with a gradient diopter is used to smoothly transition between the outer surface of the lens body 1 and the sub-lens 2. The ring belt portion 3 is used to smoothly transition between the surface of the lens body 1 and the sub-lens 2, avoiding the presence of an obvious boundary between the sub-lens 2 and the lens body 1, so that the appearance of the lens is beautiful and elegant.

[0022] Combination Figure 2 and Figure 3 As shown, the outer surface of the annular band portion 3 is tangent to the outer surface of the lens body 1 and the outer surface of the sub-lens 2. In this way, the surfaces of the lens body 1 and the sub-lens 2 can be gradually transitioned, thereby making the lens surface more beautiful.

[0023] The width of the annular zone portion 3 is 5.0 to 10.0 mm, preferably 6.5 to 8.5 mm.

[0024] Specifically, the annular band portion 3 has an annular band outer circle 31 located on the lens body 1 and an annular band inner circle 32 located on the circumferential outer side of the bottom of the sub-lens 2, the annular band outer circle 31 and the annular band inner circle 32 are both annular, and the annular band outer circle 31 is located on the circumferential outer side of the annular band inner circle 32. The annular band portion 3 is connected to the lens body 1 through the annular band outer circle 31, and the annular band portion 3 is connected to the lens body 1 through the annular band inner circle 32.

[0025] Furthermore, the radial distance between the annular outer circle 31 of the annular portion 3 and the geometric center of the lens body 1 is 1.0 to 5.0 mm, preferably 2.8 mm to 3.2 mm.

[0026] Furthermore, the distance between the geometric center of the sub-mirror 2 and the outer surface of the lens body 1 is 3.5 to 6.5 mm, preferably 4.7 to 5.3 mm.

[0027] At the same time, the distance between the geometric center of the sub-mirror 2 and the geometric center of the lens body 1 is 15.0-20.0 mm, preferably 17.0-18.0 mm.

[0028] like Figure 1 As shown, the diopter change value of the annular portion 3 in the radial direction per millimeter is 0.15 D. The diopter of the annular outer circle 31 increases by 0.15 D per millimeter in the radial direction along the annular inner circle 32 .

[0029] The diopter difference (ADD) between the sub-lens 2 and the lens body 1 is +0.50D to +3.00D.

[0030] Specifically, the lens body 1 is circular and has a diameter of 65.0 to 80.0 mm, preferably 68.5 to 71.5 mm.

[0031] The principle of this embodiment is:

[0032] A sub-lens 2 and an annular band portion 3 are arranged on the outer surface of the lens body 1, the distance between the geometric center of the lens body 1 and the geometric center of the sub-lens 2 is 17.5 mm, the distance between the annular band outer circle 31 of the annular band portion 3 and the geometric center of the lens body 1 is 3.0 mm, the diopter of the annular band portion 3 increases by 0.15D per millimeter in the radial direction, the width of the annular band portion 3 is 7.5 mm, the diopter of the sub-lens 2 increases by +2.00D compared with the diopter of the lens body 1, and the diameter of the lens body 1 is 70.1 mm, and the lens refraction is 0.15D. The refractive index is 1.553; or, the distance between the geometric center of the lens body 1 and the geometric center of the sub-mirror 2 is 18.0 mm, the distance between the annular outer circle 31 of the annular portion 3 and the geometric center of the lens body 1 is 3.2 mm, the refractive power of the annular portion 3 increases by 0.15D per millimeter along the radial direction, the width of the annular portion 3 is 6.2 mm, the refractive power of the sub-mirror 2 increases by +1.00D than the refractive power of the lens body 1, and the diameter of the lens body 1 is 70.3 mm, and the lens refractive index is 1.597.

[0033] 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.

[0034] Although the terms lens body 1, sub-lens 2, annular portion 3, annular outer circle 31, annular inner circle 32 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 progressive bifocal resin lens, comprising a lens body (1), wherein the inner surface of the lens body (1) is a concave surface and the outer surface is a convex surface, and a sub-lens (2) is provided on the outer surface of the lens body (1), characterized in that: The outer surface of the lens body (1) and the sub-lens (2) are smoothly transitioned via a ring-shaped portion (3) with a gradually changing diopter.

2. A gradient bifocal resin lens according to claim 1, characterized in that: The outer surface of the annular portion (3) is tangent to the outer surface of the lens body (1) and the outer surface of the sub-lens (2) respectively.

3. The gradient bifocal resin lens according to claim 1, characterized in that: The width of the annular belt portion (3) is 5.0 to 10.0 mm.

4. The gradient bifocal resin lens according to claim 1, characterized in that: The annular portion (3) comprises an annular outer circle (31) located on the lens body (1) and an annular inner circle (32) located on the circumferential outer side of the bottom of the sub-lens (2); the annular outer circle (31) and the annular inner circle (32) are both annular in shape, and the annular outer circle (31) is located on the circumferential outer side of the annular inner circle (32).

5. The gradient bifocal resin lens according to claim 4, characterized in that: The radial distance between the annular outer circle (31) of the annular portion (3) and the geometric center of the lens body (1) is 1.0 to 5.0 mm.

6. The gradient bifocal resin lens according to claim 1, characterized in that: The distance between the geometric center of the sub-mirror (2) and the outer surface of the lens body (1) is 3.5 to 6.5 mm.

7. The gradient bifocal resin lens according to claim 1, characterized in that: The distance between the geometric center of the sub-mirror (2) and the geometric center of the lens body (1) is 15.0 to 20.0 mm.

8. The gradient bifocal resin lens according to claim 1, characterized in that: The diopter change value of the annular zone portion (3) along the radial direction per millimeter is 0.15D.

9. The gradient bifocal resin lens according to claim 1, characterized in that: The diopter difference (ADD) between the sub-lens (2) and the lens body (1) is +0.50D to +3.00D.

10. The gradient bifocal resin lens according to claim 1, characterized in that: The lens body (1) is circular and has a diameter of 65.0 to 80.0 mm.

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