A lens component and a method for designing the lens component

Abstract

This patent discloses a lens element, including a first beam splitter and a second beam splitter. The first beam splitter has a first diopter; the second beam splitter has a second diopter, which is different from the first diopter in the first beam splitter. By designing the beam splitter and the focusing surface corresponding to the beam splitter, a dynamic optical signal interference effect is achieved, and combined with retinal contrast, a technical effect of controlling myopia is achieved.

Description

Technical Field

[0001] This invention relates to a lens element, and more particularly to a spectacle lens element for delaying the progression of myopia. Background Technology

[0002] Myopia is a major public health problem, and solutions to this problem are still under investigation.

[0003] In recent years, static myopia defocusing technology has been used to reduce axial elongation and myopia progression, but its technical principles are still not clearly revealed, and its use is more of an experimental result-oriented approach.

[0004] Recent studies have shown that different levels of visual stimulation can affect the growth of the retina and choroid. Based on this research, the use of multiple defocus lenses, especially those utilizing dynamic optical signals, can better control the progression of myopia.

[0005] Recent studies have also shown that the mechanism of retinal contrast signal setting is independent of that of defocus signal. Based on this, designing lens elements that can control retinal contrast signal is also beneficial for controlling myopia.

[0006] This patent combines the use of dynamic optical signal interference effect and retinal contrast signal in its design. Summary of the Invention

[0007] definition

[0008] Focusing light surface: Different beam splitters produce different curvatures, which lead to the focusing layer on or in front of the retina.

[0009] When light passes through a lens, light from certain areas will focus in front of the retina, while light from other areas will focus behind the retina.

[0010] Research shows that this defocus effect makes the image on the retina dynamic, with varying degrees and locations of motion in different areas. This visual stimulation affects the photoreceptor cells in the retina, which transmit the received light signals to the optic nerve cells. The optic nerve cells then relay this information to the brain, thus influencing visual perception. This dynamic optical signal interference effect can be used to regulate the growth rate of the eyeball and may play a role in controlling myopia progression. Compared to the static defocus effect, which affects the effectiveness of myopia control due to visual perception adaptation, dynamic interference optical signals can reduce visual fatigue, thereby increasing the effectiveness of myopia control.

[0011] This patent discloses a lens element, including a first beam splitter having a first diopter; and a second beam splitter having a second diopter, the second diopter being different from the first diopter in the first beam splitter.

[0012] The first focused light surface formed by the first beam splitter is located in front of the retina;

[0013] The second focused light surface formed by the second beam splitter is located in front of or behind the retina;

[0014] The closed space formed by the first focusing surface, the second focusing surface, and the surface formed by connecting the edges of the first and second focusing surfaces is the focusing beam body.

[0015] The lens element also includes a third beam splitter, which has a third diopter that is different from the first diopter in the first beam splitter and the second diopter in the second beam splitter. The third focused surface formed by the third beam splitter is located in front of or behind the retina.

[0016] The first beam splitter includes multiple independent sub-beam splitters, and all independent sub-beam splitters in the first beam splitter have the same refractive power; the second beam splitter includes multiple independent sub-beam splitters, and all independent sub-beam splitters in the second beam splitter have the same refractive power.

[0017] The third beam splitter includes multiple independent sub-beam splitters, and all independent sub-beam splitters in the third beam splitter have the same refractive power.

[0018] The first beam splitter is one of the following: a spherical lens, a cylindrical lens, a prism, a grating, an aperture coating, or a laser etching device; the second beam splitter is one of the following: a spherical lens, a cylindrical lens, a prism, a grating, an aperture, an aperture coating, or a laser etching device.

[0019] The third beam-splitting element is one of the following: spherical lens, cylindrical lens, prism, grating, aperture, coating, and laser etching.

[0020] The areas of the first, second, and third spectrometers are all different from each other.

[0021] This patent also discloses a method for designing lens components, the method comprising the following steps:

[0022] a. The patient provides relevant data about their retina;

[0023] b. Determine the number and geometry of the focusing light surface that needs to be imaged behind the patient's retina, and its distance from the retina;

[0024] c. Based on the beam splitter corresponding to any focused light surface set in step b.

[0025] Beneficial effects: When the retina continuously receives optical signal interference from different levels, it may stimulate the retina and choroid to make corresponding adjustments, including changing the length of the eyeball (i.e., axial length) to adapt to the new visual environment. This patent, by designing lenses with multiple power variations, creates image stimulation at different levels in front of and behind the retina. This multi-level visual signal can affect the activity of optic nerve cells, thereby regulating the growth of the retina, choroid, or axial length, which has important application value in the fields of myopia control and vision correction. Attached Figure Description

[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0027] Figure 1 One of the schematic diagrams of the focused light surface generated by the beam-splitting element in this patent.

[0028] in:

[0029] Different colored ellipses represent sub-spectral elements with different refractive indices;

[0030] Different colored surfaces represent focusing light surfaces formed by beam-splitting elements with different refractive indices;

[0031] Solid lines of different colors represent incident light rays, and dashed lines of different colors represent the optical axes of the sub-spectral elements.

[0032] Figure 2 Schematic diagram two of the corresponding focused light surface generated by the beam-splitting element of this patent.

[0033] Figure 3 A schematic diagram illustrating the geometric optical design steps of the focused light surface generated by one of the beam-splitting components in this patent.

[0034] Figure 4 A schematic diagram of the second step in the geometric optical design of the focused light surface generated by one of the beam-splitting components in this patent.

[0035] Figure 5 A schematic diagram of the third step in the geometric optical design of the focused light surface generated by one of the beam-splitting components in this patent.

[0036] Figure label:

[0037] u1 is the angle of incidence;

[0038] u2 angle of refraction;

[0039] n1 air refractive index;

[0040] n2 lens model eye refractive index;

[0041] y-incident height;

[0042] c. Curvature of the refractive surface;

[0043] f focal length;

[0044] axial length; Detailed Implementation

[0045] As can be seen from the invention content section, the core of this patent lies in how to achieve dynamic optical signal interference effect and retinal contrast control through the design of a beam splitter and a corresponding focusing light surface to achieve the technical effect of controlling myopia.

[0046] The following section will explain the specific implementation method by describing how to design the beam-splitting element and the corresponding focusing surface. This example is an embodiment that uses a lens as multiple sub-beam-splitting elements.

[0047] Firstly, as Figure 1 This is one of the schematic diagrams of the focused light surface generated by the beam-splitting element of this patent, wherein:

[0048] Different colored ellipses represent sub-spectral elements with different refractive indices;

[0049] Different colored surfaces represent focusing light surfaces formed by beam-splitting elements with different refractive indices;

[0050] Solid lines of different colors represent incident light rays, and dashed lines of different colors represent the optical axes of the sub-spectral elements.

[0051] like Figure 2 In a complete lens element, different colors represent different beam splitters. That is, multiple red sub-beam splitters form a focusing surface, and multiple green sub-beam splitters form another focusing surface.

[0052] Defocus zone design

[0053] As attached Figure 3 This is a geometric optical principle diagram of the focused light surface generated near the central focal length position.

[0054] u1 is the angle of incidence; u2 is the angle of refraction; n1 is the refractive index of air; n2 is the refractive index of the model eye with lenses; y is the height of incidence; c is the curvature of the refractive surface; f is the focal length; l is the axial length of the eye.

[0055] Let z be the depth from the retina;

[0056] According to the Gauss-Snell law, calculations show that:

[0057]

[0058] f = y × tan(u²) (2)

[0059] The focal length distance to retinal depth z = lf × cos(u1) can be obtained.

[0060] As attached Figure 4 First, obtain the first incident angle u1. From formulas (1) and (2), we can know that...

[0061]

[0062] The height of the incident light to the retinal layer is y4=f×sinu4(4)

[0063] The shape of the focused light surface can be obtained as follows:

[0064]

[0065] Here, 'a' and 'b' are shape factors.

[0066] As attached Figure 5 From formulas (1)-(6), we can know that:

[0067]

[0068] As is generally known in this field, different lens powers will cause different refractive powers P in the model eye, with the relationship being: r is the radius of curvature; c is the curvature.

[0069]

[0070] Each degree will have two or more focal positions with an incident angle u1 of two or more angles. According to formulas (7)-(9), two unknowns a and b can be obtained, and then the focal surface produced by this lens degree can be obtained.

[0071] The above Figures 1-5 The explanation is that the process from the incident light to the formation of the focused light surface is reversible. That is, the beam-splitting element and the focused light surface can be each other's independent and variable.

[0072] In the actual design process, after obtaining the shape-related data of the patient's retina, based on the purpose of forming a multi-layered focused light surface to induce signal stimulation around the fundus retina and thereby induce fundus changes, the desired position of the focused light surface is set. Through inverse calculation, the refractive power of the required beam splitter can be obtained.

[0073] For this patent, the number and shape of independent sub-splitters in any spectral splitter are not limited. Figure 1 , Figure 2 These are schematic diagrams illustrating two implementation methods.

[0074] Retinal contrast signal settings

[0075] The mechanism of setting the retinal contrast signal is independent of that of the defocus signal. Based on this, by setting different areas of different beam splitters, the purpose of setting the contrast signal can be achieved.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lens element, comprising a first beam splitter having a first diopter; and A second beam splitter has a second diopter that is different from the first diopter in the first beam splitter. Its features are: The first focused light surface formed by the first beam splitter is located in front of the retina; The second focused light surface formed by the second beam splitter is located in front of or behind the retina; The closed space formed by the first focusing surface, the second focusing surface, and the surface formed by connecting the edges of the first and second focusing surfaces is the focusing beam body.

2. A lens element as described in claim 1, characterized in that: The lens element also includes a third beam splitter, which has a third diopter that is different from the first diopter in the first beam splitter and the second diopter in the second beam splitter. The third focused surface formed by the third beam splitter is located in front of or behind the retina.

3. A lens element as described in claim 1, characterized in that: The first beam splitter includes multiple independent sub-beam splitters, and all independent sub-beam splitters in the first beam splitter have the same refractive power; the second beam splitter includes multiple independent sub-beam splitters, and all independent sub-beam splitters in the second beam splitter have the same refractive power.

4. A lens element as described in claim 2, characterized in that: The third beam splitter includes multiple independent sub-beam splitters, and all independent sub-beam splitters in the third beam splitter have the same refractive power.

5. A lens element as described in claim 3, characterized in that: The first beam splitter is one of the following: a spherical lens, a cylindrical lens, a prism, a grating, an aperture, a coating, or a laser etching; the second beam splitter is one of the following: a spherical lens, a cylindrical lens, a prism, a grating, an aperture, a coating, or a laser etching.

6. A lens element as described in claim 4, characterized in that: The third beam-splitting element is one of the following: spherical lens, cylindrical lens, prism, grating, aperture, coating, and laser etching.

7. A lens element as described in claim 3 or 5, characterized in that: The areas of the first, second, and third spectrometers are all different from each other.

8. A method for designing a lens element, the method comprising the following steps: a. The patient provides relevant data about their retina; b. Determine the number and geometry of the focusing light surface that needs to be imaged behind the patient's retina, and its distance from the retina; c. Based on step b, set the beam-splitting element corresponding to any of the focusing light surfaces as described in claims 1-6.

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