Cross-type zoom prevention and control lens
By designing a 10mm central lens and a 6mm microlens in the lens, combined with a diopter reduction design in a specific direction, the problem of inconsistent light focus points in the prior art is solved, and effective vision correction and eye axis protection effects are achieved.
Patent Information
- Application Number
- CN202421722143.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-19
AI Technical Summary
When the pupil size changes in different environments of existing microlens array lenses, multiple microlenses cause inconsistent focus points of light, causing discomfort symptoms such as blurred vision and dizziness, which makes it difficult to effectively prevent and control it.
A cross-zoom prevention and control lens is designed, using a 10mm diameter central lens and a 6mm diameter microlens. The microlens group has a diopter reduction design in a specific direction to ensure that light enters the pupil through one lens and focus and prevents the formation of different focal points.
Effectively prevent light from entering the eye at the same time due to different diopter microlenses, forming different focal points, ensuring that the wearer obtains focused light, reducing blurred vision and discomfort symptoms, and hindering and delaying eye axis growth.
Smart Images
Figure CN222825758U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wearable vision equipment, and in particular to a cross-type zoom prevention and control lens. Background Art
[0002] In the prior art, myopia lenses using a microlens array structure are mainly divided into two types: 1) The microlenses are arranged in a ring array around the central optical zone of the lens, such as lenses using high aspheric microlens star control technology, which have 11 rows of 1021 aspheric microlenses 9 mm outside the central optical zone of the lens; 2) The microlenses are arranged in a honeycomb pattern around the lens, such as lenses using multi-zone positive optical defocus technology, which have 396 microlenses within 34 mm outside the central optical zone of the lens; the principles of vision correction of these two types of lenses are relatively similar, and both rely on the setting of microlenses so that the light passing through the microlenses will form a non-focused beam band in front of the retina to slow down the growth of the eye axis. Each type of lens has its own advantages and disadvantages: the circular array approach allows the microlenses to occupy more area on the lens, thereby forming a larger vision correction area; while the honeycomb arrangement approach allows the microlenses to have the same spacing and be denser, and when the eyeball moves, the number of microlenses within the pupil range can be kept small at all times, which means better dynamic vision (because the pupil position changes as the eyeball moves, the number of microlenses designed with a circular array will be 4-6 within a pupil range of 4mm, while the number of microlenses designed with a honeycomb arrangement will be stable at 6-7).
[0003] However, the size of the pupil will change in different environments (generally, the normal value of the pupil size is about 2-4mm, but in a dim environment the pupil will dilate to 4-6mm; in a relatively bright environment the pupil will shrink to 1-2mm, so the pupil size fluctuates between 1-8mm, and is a perfect circle as a whole with equal size on both sides). If multiple microlenses refract light of different refractive powers into the same pupil of the eye, multiple light focusing points will be generated, causing the wearer to experience moderate to high astigmatism, i.e. seeing double and blurred images, which can make the wearer prone to dizziness and nausea, which is extremely unfavorable for vision correction and effective prevention and control. Utility Model Content
[0004] The purpose of the utility model is to provide a cross-focus prevention and control lens. The utility model is improved on the basis of the microlens array lens in the prior art, and the size and arrangement of the central lens and microlenses of the lens are further limited to ensure that external light can smoothly pass through one lens into the pupil for focusing, and prevent multiple microlenses from transmitting light at the same time and forming different focal points in the pupil.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A cross-focus prevention and control lens, comprising a lens base, a circular central lens arranged at the center of the lens base, and a microlens group arranged radially with the central lens as the center, the microlens group consisting of a number of circular microlenses with equal circumferential spacing and annular array around the central lens, the central lens has a diameter of 10 mm, and the microlenses have a diameter of 4-7 mm.
[0007] Preferably, the diameter of the microlens is 6 mm.
[0008] The central lens diameter of the present application is 10mm, ensuring that the central optical zone area of the lens is larger than the range of pupil variation, ensuring that focused light can be obtained when the wearer is in the straight-looking posture that is used the longest; at the same time, the 6mm microlens design ensures that external light can smoothly pass through one lens into the pupil and be focused when the eyeball rotates, preventing light from entering the eye at the same time and forming different focal points due to microlenses of different refractive powers.
[0009] Preferably, the refractive power of the lens decreases from the central lens to the outermost microlens group.
[0010] Preferably, the decreasing value of the lens in the direction is 20-50 degrees.
[0011] In order to prevent the light passing through the microlens from falling behind the retina and inducing the force of eye axis elongation, the lens reduction design of the present application can ensure that the focus of external light falls on the retina or falls in front of the retina to prevent hyperopic defocus. This can effectively prevent and delay eye axis growth.
[0012] Preferably, the microlenses in the same microlens group are tangent to each other.
[0013] The microlens spacing of the same microlens group can be reduced, and the spacing between adjacent microlens groups should also be designed to be minimized, so as to minimize the probability of the eye receiving external light from the microlens gaps when it moves.
[0014] Preferably, the same microlens group is composed of two microlenses with a refractive power difference of 15-25 degrees, which are arranged alternately.
[0015] Preferably, the same microlens group is composed of two microlenses with a refractive power difference of 20 degrees arranged alternately.
[0016] In the same microlens group, two microlenses with different refractive powers are arranged alternately. In this way, when the eyeball rotates, the microlenses with different difference refractive powers can sequentially shoot light into the eye. At the same time, the refractive power difference between the two microlenses is optimally 20 degrees and cannot be too large or too small. In this way, eye adjustment training can be achieved on the basis of minimizing eye maladaptability, thereby achieving the effect of correcting vision and preventing and controlling myopia.
[0017] Preferably, the lens can be processed and formed by laser relief molding on the lens substrate.
[0018] Compared with the prior art, the utility model has the following advantages:
[0019] 1) The utility model improves on the microlens array lens in the prior art, limits the size of the central lens and microlens of the lens, ensures that external light can smoothly pass through one lens into the pupil for focusing, and prevents multiple microlenses from transmitting light at the same time and forming different focal points in the pupil;
[0020] 2) The phototropism of different microlens groups is gradually reduced along a specific direction, which can ensure that the focus of external light falls on the retina or in front of the retina to prevent hyperopic defocus, thereby effectively blocking and delaying the growth of the eye axis;
[0021] 3) Two microlenses with different refractive powers are arranged alternately in the same microlens group. When the eyeball rotates, the microlenses with different difference refractive powers can sequentially shoot light into the eye. At the same time, the difference in refractive power between the two microlenses is moderate. In this way, the adjustment training of the eyes can be achieved on the basis of minimizing the maladaptability of the eyes, thereby achieving the effect of correcting vision. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the structure of the cross-type variable-focus prevention and control lens described in Example 1;
[0023] Figure 2 This is a schematic diagram of the structure of the cross-type variable-focus prevention and control lens described in Example 2. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Example
[0025] like Figure 1 As shown, a cross-focus prevention and control lens includes a lens substrate 1, a circular central lens 2 arranged at the center of the lens substrate, and an array of microlenses 3 arranged radially with equal intervals around the central lens.
[0026] The microlens group 3 is composed of two circular microlenses 4 with a diopter difference of 20 degrees, which are arranged alternately at equal intervals and form a ring array structure around the central lens. The central lens has a diameter of 10 mm and the microlenses have a diameter of 6 mm. The lens diopter decreases from the central lens to the outermost microlens group, and the decreasing degree is 35 degrees.
[0027] The central lens diameter of the present application is 10mm, ensuring that the central optical zone area of the lens is larger than the range of pupil variation, ensuring that focused light can be obtained when the wearer is in the straight-looking posture that is used the longest; at the same time, the 6mm microlens design ensures that external light can smoothly pass through one lens into the pupil and be focused when the eyeball rotates, preventing light from entering the eye at the same time and forming different focal points due to microlenses of different refractive powers.
[0028] In order to prevent the light passing through the microlens from falling behind the retina and inducing the force of eye axis elongation, the lens reduction design of the present application can ensure that the focus of external light falls on the retina or falls in front of the retina to prevent hyperopic defocus. This can effectively prevent and delay eye axis growth.
[0029] In the same microlens group, two microlenses with different refractive powers are arranged alternately. In this way, when the eyeball rotates, the microlenses with different difference refractive powers can sequentially shoot light into the eye. At the same time, the refractive power difference between the two microlenses is optimally 20 degrees and cannot be too large or too small. In this way, eye adjustment training can be achieved on the basis of minimizing eye maladaptability, thereby achieving the effect of correcting vision and preventing and controlling myopia. Example
[0030] like Figure 2 As shown, a cross-focus prevention and control lens includes a lens substrate 1, a circular central lens 2 arranged at the center of the lens substrate, and an array of microlenses 3 arranged with the central lens as the center of the circle.
[0031] The microlens group 3 is composed of two circular microlenses 4 with a diopter difference of 20 degrees, which are alternately arranged and form a ring array structure around the central lens. The adjacent microlenses 4 in the same microlens group 3 are arranged tangentially. The diameter of the central lens is 10 mm, and the diameter of the microlenses is 6 mm. The lens diopter decreases from the central lens to the outermost microlens group, and the decreasing degree is 35 degrees.
[0032] The central lens diameter of the present application is 10mm, ensuring that the central optical zone area of the lens is larger than the range of pupil variation, ensuring that focused light can be obtained when the wearer is in the straight-looking posture that is used the longest; at the same time, the 6mm microlens design ensures that external light can smoothly pass through one lens into the pupil and be focused when the eyeball rotates, preventing light from entering the eye at the same time and forming different focal points due to microlenses of different refractive powers.
[0033] In order to prevent the light passing through the microlens from falling behind the retina and inducing the force of eye axis elongation, the lens reduction design of the present application can ensure that the focus of external light falls on the retina or falls in front of the retina to prevent hyperopic defocus. This can effectively prevent and delay eye axis growth.
[0034] Two microlenses 4 with different refractive powers are arranged alternately in the same microlens group 3, so that when the eyeball rotates, the microlenses 4 with different difference refractive powers can sequentially inject light into the eye. At the same time, the refractive power difference between the two microlenses 4 is optimally 20 degrees and cannot be too large or too small. In this way, eye adjustment training can be achieved on the basis of minimizing eye maladaptation, thereby achieving the effect of correcting vision and preventing and controlling myopia.
[0035] The microlenses 4 of the same microlens group 3 are arranged tangentially, which can reduce the spacing between the microlenses 3 in the same microlens group. At the same time, the spacing between adjacent microlens groups 3 should also be designed to be minimized, so as to minimize the probability of the eyes receiving external light from the gaps between the microlenses 3 when they move.
Claims
1. A cross-focus prevention and control lens, comprising a lens base, a circular central lens arranged at the center of the lens base, and an array of microlenses arranged radially with the central lens as the center, wherein the microlens group is composed of a plurality of circular microlenses with equal circumferential spacing and annularly arranged around the central lens, characterized in that: The diameter of the central lens is 10 mm, and the diameter of the microlens is 4-7 mm.
2. The cross-focus prevention lens according to claim 1, characterized in that: The diameter of the microlens is 6 mm.
3. The cross-focus prevention lens according to claim 1, characterized in that: The refractive power of the lens decreases from the central lens to the outermost micro-lens group.
4. The cross-focus prevention lens according to claim 3, characterized in that: The lens has a decrement value of 20-50 degrees in the direction.
5. The cross-focus prevention lens according to claim 1, characterized in that: The microlenses in the same microlens group are arranged tangentially to each other.
6. The cross-focus prevention and control lens according to any one of claims 1 to 5, characterized in that: The same microlens group is composed of two microlenses with a refractive power difference of 15-25 degrees arranged alternately.
7. The cross-focus prevention lens according to claim 6, characterized in that: The same microlens group is composed of two microlenses with a refractive power difference of 20 degrees arranged alternately.
8. The cross-focus prevention lens according to claim 1, wherein: The lens is formed by laser engraving a lens substrate.