A free-form surface combined with peripheral defocusing lens

Abstract

The utility model discloses a free-form surface combined with peripheral defocusing combined lens, specifically relates to the technical field of ophthalmic lenses, comprising a first lens, wherein a second lens is arranged on one side of the first lens, wherein a free-form surface mechanism is arranged at the center of the first lens, and the free-form surface mechanism comprises a convex optical zone arranged at the center of the first lens, wherein a plurality of first microlenses are arranged on the surface of the convex optical zone, the diameters of the plurality of first microlenses are successively increased radially outward, and a concave surface is arranged on the surface of the convex optical zone, wherein a thin film layer is arranged around the first lens and the second lens. The utility model can optimize the optical performance of the lens, reduce visual fatigue and discomfort, and at the same time can also improve the impact resistance and stability of the lens through the thin film layer.

Description

Technical Field

[0001] The utility model relates to the technical field of ophthalmic lenses, and more specifically, to a free-curved surface combined with peripheral defocusing combined lens. Background Art

[0002] In recent years, the number of people with myopia and hyperopia has increased significantly, especially among adolescents in the growth and development period. Watching TV and using computers for a long time can easily cause eye fatigue and decreased vision, and they have to wear glasses for myopia. Currently, one of the clinically proven effective means of controlling the progression of myopia is to control the growth of the eye axis through peripheral defocus, thereby delaying the progression of myopia.

[0003] Existing vision adjustment lenses generally have many limitations, such as being inconvenient to carry and having a small zoom range. This type of lens has a small zoom range, a very narrow zoom optical area, and large distortion in the peripheral aberration area, causing inconvenience to use.

[0004] After searching, a Chinese patent with publication number CN219811099U discloses a free-form surface combined with peripheral defocus combination lens. The combination lens provided by this structure cooperates with each other by setting two groups of lenses that move forward and backward. Two groups of rear lenses and front lenses are provided according to the user's pupil distance to train the user's eyes respectively, train the adjustment ability of the glasses, and perform continuous zooming over a wide range. It can perform visual training regularly to achieve the purpose of improving visual ability and relieving eye fatigue, and can effectively slow down the progression of myopia.

[0005] However, in actual use, this structure realizes the adjustment ability of the training glasses through the cooperation between the front lens and the rear lens. Since the rear lens and the front lens are both circular structures and the edges of the lenses are relatively fragile, when the edges of the lenses are impacted, they are more likely to break, thus posing certain safety hazards. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a free-form surface combined with peripheral defocusing combined lens to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A free-form surface combined with peripheral defocusing combined lens comprises a first lens, a second lens is arranged on one side of the first lens, and a free-form surface mechanism is arranged at the center of the first lens;

[0009] The free-form surface mechanism includes a convex optical zone arranged at the center of a first lens, a plurality of first microlenses are arranged on the surface of the convex optical zone, the diameters of the plurality of first microlenses increase sequentially along the radial outward direction, a concave surface is arranged on the surface of the convex optical zone, and a thin film layer is arranged around the first lens and the second lens.

[0010] By adopting the above technical solutions: in order to optimize the optical performance of the lens, reduce visual fatigue and discomfort, the design of the film can also improve the impact resistance and stability of the lens.

[0011] As a further description of the above technical solution: the first lens is made of polycarbonate, a defocus ring is arranged on the surface of the first lens, a far vision area is arranged at the center of the second lens, and a plano area is arranged outside the far vision area.

[0012] By adopting the above technical solution: in order to increase the weight of the lens, so that the user's use effect is more comfortable, and also ensure stability.

[0013] As a further description of the above technical solution: a honeycomb-shaped second microlens is arranged at the center of the defocus ring, the defocus ring has the same size as the flat light area, and the surfaces of the first lens and the second lens are both provided with an anti-reflection coating.

[0014] By adopting the above technical solution: in order to improve the stability of imaging and enhance the anti-reflection ability of the lens, it can not only increase the service life of the lens, but also reduce light interference and improve visual clarity.

[0015] Technical effects and advantages of the utility model:

[0016] 1. By setting a free-form surface mechanism, compared with the prior art, the concave surface set on the surface of the convex optical zone corresponds to the multiple first microlenses set on the convex optical zone, so that the diameter of the first microlenses increases radially outward in sequence, thereby having the effect of increasing the defocus amount, ensuring the defocus effect while effectively reducing the aberration, optimizing the optical performance of the lens, reducing the visual fatigue and discomfort of the user, and the thin film layer is made of aluminum oxide material. When the lens is subjected to external impact or friction, the thin film layer can effectively resist scratches and wear, maintain the integrity and transparency of the lens, and enhance safety;

[0017] 2. By setting a first lens and an anti-reflective coating, compared with the prior art, the first lens is made of polycarbonate material. Since polycarbonate lenses have excellent impact resistance and lightweight characteristics, safety is improved, and the anti-reflective coating is to reduce the reflection of light on the lens surface, reduce glare and interference, improve visual clarity, and thus maintain a clear field of view of the lens. As the front and rear lenses move, the far vision areas of the two are zoomed, so that the far vision area and the plano area overlap with each other. The defocus ring is formed by setting a honeycomb-shaped second microlens, so that the passing light beam will not have two different imaging principles, further improving the stability of imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the first lens structure of the utility model.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the free-form surface mechanism of the utility model.

[0021] Figure 4 It is a front view structural schematic diagram of the free-form surface mechanism of the utility model.

[0022] Figure 5 This is a schematic diagram of the second lens structure of the present invention.

[0023] The reference numerals in the drawings are: 1, first lens; 2, second lens; 3, convex optical zone; 4, first microlens; 5, concave surface; 6, thin film layer; 7, defocus ring; 8, far vision zone; 9, plano zone; 10, second microlens; 11, anti-reflection coating. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The embodiments of this application disclose Figure 1-5 A free-form surface combined with peripheral defocusing combined lens shown comprises a first lens 1, a second lens 2 is arranged on one side of the first lens 1, and a free-form surface mechanism is arranged at the center of the first lens 1;

[0026] The free-form surface mechanism includes a convex optical zone 3 arranged at the center of the first lens 1, a plurality of first microlenses 4 are arranged on the surface of the convex optical zone 3, the diameters of the plurality of first microlenses 4 are successively increased radially outward, a concave surface 5 is arranged on the surface of the convex optical zone 3, and a thin film layer 6 is arranged around the first lens 1 and the second lens 2. By arranging a plurality of first microlenses 4 on the convex optical zone 3, when the user uses the device, the light beam entering the user's eye forms myopic defocus, and the object is imaged in front of the retina, which can avoid the growth of the eye axis and delay or control the deepening of myopia. In addition, the diameter of the first microlens 4 increases radially outward, thereby increasing the defocus amount, ensuring the defocus effect while effectively reducing the aberration, optimizing the optical performance of the lens, and reducing the user's visual fatigue and discomfort.

[0027] Reference Figure 2-3 As shown, the first lens 1 is made of polycarbonate material, a defocus ring 7 is arranged on the surface of the first lens 1, a far vision area 8 is arranged at the center of the second lens 2, and a flat light area 9 is arranged outside the far vision area 8. The position of the first lens 1 is fixed, and the second lens 2 is moved back and forth along the outer central axis, so as to change the distance between the first lens 1 and the second lens 2. By making the first lens 1 of polycarbonate material, the safety is improved because the polycarbonate lens has excellent impact resistance and lightweight characteristics.

[0028] Reference Figure 4-5 As shown, a honeycomb-shaped second microlens 10 is arranged at the center of the defocus ring 7, and the defocus ring 7 has the same size as the plano area 9. The surfaces of the first lens 1 and the second lens 2 are both provided with an anti-reflection coating 11. As the front and rear lenses move, the far vision areas 8 of the two lenses are zoomed, so that the far vision area 8 and the plano area 9 overlap with each other. The second honeycomb-shaped microlens 10 is arranged in the defocus ring 7, so that the passing light beam will not have two different imaging principles, which further improves the imaging stability. In addition, the anti-reflection coating 11 is to reduce the reflection of light on the lens surface, reduce glare and interference, improve visual clarity, and thus maintain a clear field of view of the lens.

[0029] Working principle of the utility model: when the utility model is used, the position of the first lens 1 is fixed, and the second lens 2 moves forward and backward along the outer central axis, thereby changing the distance between the first lens 1 and the second lens 2. As the front and rear lenses move, the telephoto areas 8 of the two lenses are zoomed, so that the telephoto area 8 and the plano area 9 overlap each other. The honeycomb-shaped second microlens 10 is set in the defocus ring 7, so that the light beam passing through will not have two different imaging principles, and the imaging stability is further improved;

[0030] By arranging a plurality of first microlenses 4 on the convex optical zone 3, when the user uses the device, the light beam entering the user's eye forms myopic defocus, and the object is imaged in front of the retina, which can avoid the growth of the eye axis and delay or control the deepening of myopia. In addition, the diameter of the first microlens 4 increases radially outward, thereby increasing the defocus amount, ensuring the defocus effect while effectively reducing the aberration, optimizing the optical performance of the lens, and reducing the user's visual fatigue and discomfort.

[0031] At the same time, by making the first lens 1 of polycarbonate material, since polycarbonate lenses have excellent impact resistance and lightweight properties, safety is improved, and a thin film layer 6 is set on the surface of the first lens 1 and the second lens 2, and the thin film layer 6 is made of aluminum oxide. When the lens is subjected to external impact or friction, the thin film layer 6 can effectively resist scratches and wear and maintain the integrity and transparency of the lens. The anti-reflective coating 11 is to reduce the reflection of light on the lens surface, reduce glare and interference, improve visual clarity, and thus maintain a clear field of view of the lens.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A free-form surface combined with peripheral defocusing lens, comprising a first lens (1), characterized in that: A second lens (2) is arranged on one side of the first lens (1), and a free-form surface mechanism is arranged at the center of the first lens (1); The free-form surface mechanism comprises a convex optical zone (3) arranged at the center of a first lens (1); a plurality of first microlenses (4) are arranged on the surface of the convex optical zone (3); the diameters of the plurality of first microlenses (4) increase radially outward in sequence; a concave surface (5) is arranged on the surface of the convex optical zone (3); and thin film layers (6) are arranged around the first lens (1) and the second lens (2).

2. The free-form surface combined with peripheral defocusing lens according to claim 1, characterized in that: The first lens (1) is made of polycarbonate material, and a defocus ring (7) is provided on the surface of the first lens (1).

3. The free-form surface combined with peripheral defocusing lens according to claim 1, characterized in that: A far vision area (8) is provided at the center of the second lens (2), and a plano area (9) is provided outside the far vision area (8).

4. The free-form surface combined with peripheral defocusing lens according to claim 2, characterized in that: A honeycomb-shaped second microlens (10) is arranged at the centre of the defocus ring (7); the defocus ring (7) has the same size as the plano area (9).

5. The free-form surface combined with peripheral defocusing lens according to claim 1, characterized in that: The surfaces of the first lens (1) and the second lens (2) are both provided with an anti-reflection coating (11).

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