Optical element and imaging intervention device

Abstract

The present application discloses an optical element and an imaging intervention device, comprising: a body, the body having a radial direction X and a thickness direction Y perpendicular to the radial direction X, the body comprising a first optical surface and a second optical surface opposite to each other in the thickness direction; a plurality of microstructure units, the plurality of microstructure units being arranged on the body and arranged in the radial direction X; the microstructure unit comprising an adjustment surface, the adjustment surface and at least one of the first optical surface and the second optical surface being arranged at intervals in the thickness direction Y; the surface roughness Raμm of the adjustment surface satisfies: 0.012≤Ra≤100; the adjustment surface is used to cause diffuse reflection when light is incident and aggravate energy loss, and the light cannot be completely focused at any position after passing through the adjustment surface. The optical element of the present application is provided with an adjustment surface that causes diffuse reflection of light, so that the light cannot be focused and imaged at any position, and the optical element can intervene in the development of refractive error by generating energy loss.

Description

Technical Field

[0001] The present application belongs to the field of optical devices, and specifically relates to an optical element and an imaging intervention device. Background Art

[0002] The principle of myopic defocus microstructure optical elements is to converge the light of microstructure units in front of the retina, which can form myopic defocus signals in the periphery of the retina. Clinical evidence shows that this type of optical element has the effect of slowing down the progression of myopia in adolescents compared to ordinary single-focus optical elements. However, there are also certain risks. This risk includes: when people with accommodative lag wear defocus optical microstructure elements, when they read near through the microstructure area, the adjustment cannot keep up temporarily, resulting in the use of microstructure units in the center of the macula to form fixation. As a result, the peripheral clear vision may form reverse hyperopic defocus in the periphery of the retina and affect the effect. Another risk is: some clinical evidence shows that while the microstructure defocus element successfully inhibits the progression of myopia in adolescents, the frequent image jumps formed by the repeated conversion of vision between the clear vision area and the microstructure unit area promote the growth of astigmatism. Summary of the invention

[0003] Purpose of the invention: The embodiments of the present application provide an optical element and an imaging intervention device, which configures a curved surface on a microstructure to cause diffuse reflection of light, thereby aggravating the energy loss of light passing through the microstructure to interfere with the imaging quality, thereby alleviating the further development of refractive errors.

[0004] Technical solution: An optical element described in an embodiment of the present application includes:

[0005] A body, the body having a radial direction and a thickness direction perpendicular to the radial direction, the body comprising a first optical surface and a second optical surface opposite to each other along the thickness direction;

[0006] A plurality of microstructure units are provided on the body and arranged along the radial direction X; the microstructure unit comprises an adjustment surface, the adjustment surface is spaced apart from at least one of the first optical surface and the second optical surface in the thickness direction Y; the surface roughness Ra μm of the adjustment surface satisfies: 0.012≤Ra≤100; the adjustment surface is used to cause diffuse reflection and aggravate energy loss when light is incident, and the light cannot be completely focused at any position after passing through the adjustment surface, so as to interfere with imaging quality.

[0007] In some embodiments, the microstructure unit is a protrusion, the surface of the protrusion away from the body is the adjustment surface, the adjustment surface is located on a side of the first optical surface away from the second optical surface and / or the adjustment surface is located on a side of the second optical surface away from the first optical surface;

[0008] The microstructure unit further includes a connecting surface and a side surface, the connecting surface is connected to the first optical surface and / or the second optical surface, the adjustment surface is arranged opposite to the connecting surface in the thickness direction; the side surface is located between the adjustment surface and the connecting surface and is respectively connected to the adjustment surface and the connecting surface; the adjustment surface, the connecting surface and the side surface jointly enclose the protrusion;

[0009] Wherein, the adjustment surface has a recessed portion facing the connection surface and a protruding portion away from the connection surface in the thickness direction.

[0010] In some embodiments, the microstructure unit is a groove, the groove has an opening and a bottom wall opposite to the opening; the bottom wall is the adjustment surface, and the adjustment surface is located between the first optical surface and the second optical surface; the opening passes through the first optical surface and / or the second optical surface along the thickness direction;

[0011] The microstructure unit further includes a side surface, the side surface is located between the adjustment surface and the first optical surface and is respectively connected to the adjustment surface and the first optical surface and / or the side surface is located between the adjustment surface and the second optical surface and is respectively connected to the adjustment surface and the second optical surface; the side surface and the adjustment surface together enclose the groove;

[0012] Wherein, the regulating surface has a recessed portion facing the opening and a protruding portion away from the opening in the thickness direction.

[0013] In some embodiments, the recessed portion and the protruding portion are spaced apart; or,

[0014] The protruding portion is at least connected to the recessed portion.

[0015] In some embodiments, the recessed portion is provided in plurality, and the protruding portion is provided in plurality;

[0016] The plurality of protrusions are connected to each other, the plurality of recesses are connected to each other, and one of the plurality of protrusions is connected to one of the plurality of recesses; or

[0017] The plurality of protrusions are spaced apart from each other, the plurality of recesses are spaced apart from each other, and one of the plurality of protrusions is connected to one of the plurality of recesses; or

[0018] The plurality of protrusions are spaced apart from each other, the plurality of recesses are connected to each other, and one of the plurality of protrusions is connected to one of the plurality of recesses; or

[0019] The plurality of protrusions are connected to each other, the plurality of recesses are spaced apart from each other, and one of the plurality of protrusions is connected to one of the plurality of recesses; or

[0020] The recessed portions and the protruding portions are alternately arranged and connected to each other.

[0021] In some embodiments, the adjustment surface is wavy or sawtooth-shaped; or

[0022] The adjustment surface is a curved surface with alternating positive and negative curvatures.

[0023] In some embodiments, the diffuse reflection coefficient of the adjustment surface when generating diffuse reflection is , the diffuse reflectance Further satisfaction: 0.17< ≤0.6, and ;

[0024] in, represents the normalized value of the surface roughness of the adjustment surface, and , for of times and times or less; α represents the maximum angle between the line connecting the vertex of the protrusion and the side surface and the cross section of the microstructure unit in the thickness direction.

[0025] In some embodiments, when the microstructure unit is a protrusion, the α further satisfies:

[0026] 6.25×10 -4 ≤tanα / (N+1)≤0.10, wherein N represents the number of times the sign of the curvature of the adjustment surface changes, and the range of N is 1-15.

[0027] In some embodiments, when the microstructure unit is a protrusion, the α further satisfies: When the microstructure unit is a groove, the α further satisfies:

[0028] 2.5×10 -4 ≤tanα / (N+1)≤0.20, wherein N represents the number of times the sign of the curvature of the adjustment surface changes, and the range of N is 1-15.

[0029] In some embodiments, the protrusion and the surface of the body have a maximum height h μm in the thickness direction; the angle between the side and the surface of the body is β; the diameter of the microstructure unit is d mm; and the optical element further satisfies:

[0030] h=(tanα+0.5tanβ)d / (N+1);

[0031] Wherein, N represents the number of times the curvature sign of the adjustment surface changes, and the range of N is 1-15.

[0032] In some embodiments, the optical element satisfies at least one of the following features:

[0033] a) 0.01°≤α≤75°;

[0034] b) 70°≤β≤90°;

[0035] c) 0.1≤h≤20.

[0036] In some embodiments, the microstructure units are spaced apart from each other; or

[0037] The microstructure units are closely arranged with each other.

[0038] In some embodiments, the distance between adjacent microstructure units is D mm, the diameter of the microstructure unit is d mm, and the following conditions are satisfied:

[0039] 0.3≤2D+3d≤4; or

[0040] 0.05≤d≤1; or

[0041] 0≤D≤1.

[0042] In some embodiments, the present application also provides an imaging intervention device, which includes the optical element.

[0043] Beneficial effects: Compared with the prior art, an optical element of the present application comprises: a body, the body having a radial direction X and a thickness direction Y perpendicular to the radial direction X, the body comprising a first optical surface and a second optical surface opposite to each other in the thickness direction; a plurality of microstructure units, the plurality of microstructure units being arranged on the body and arranged in the radial direction X; the microstructure unit comprising an adjustment surface, the adjustment surface and at least one of the first optical surface and the second optical surface being arranged at intervals in the thickness direction Y; the surface roughness Ra μm of the adjustment surface satisfies: 0.012≤Ra≤100; the adjustment surface is used to make light diffusely reflected and aggravate energy loss when incident, and the light cannot be fully focused at any position after passing through the adjustment surface, so as to interfere with the imaging quality. The optical element of the present application is provided with an adjustment surface having a diffuse reflection phenomenon on the microstructure unit, so that the light passing through the microstructure cannot be fully focused at any position for imaging, so that the optical element can interfere with the development of refractive error by generating energy loss, thereby achieving the goal of not interfering with the imaging quality in the form of low-order aberrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 is a front view of an optical element provided in an embodiment of the present application;

[0046] Figure 2 yes Figure 1 a cross-sectional view of the optical element shown;

[0047] Figure 3 It is a schematic diagram of the structure when the microstructure unit is a convexity;

[0048] Figure 4 It is a schematic diagram of the structure when the microstructure unit is a groove;

[0049] Figure 5 is a front view of another optical element provided in an embodiment of the present application;

[0050] Figure 6 is another front view of an optical element provided in an embodiment of the present application;

[0051] Figure 7 It is a simulation schematic diagram of an embodiment of the present application;

[0052] Figure 8 It is a schematic diagram of the scattering function of the spherical microstructure optical element-human eye system during imaging;

[0053] Fig. 9 This is a schematic diagram of the imaging scattering function of the optical element-human eye system of the present application;

[0054] Fig.10 yes Figure 8 Schematic diagram of contrast loss corresponding to the model;

[0055] Fig.11 yes Fig. 9 Schematic diagram of contrast loss corresponding to the model;

[0056] Figure markings: 10 - main body, 101 - first optical surface, 102 - second optical surface, 103 - optical center, 201 - microstructure unit, 2011 - adjustment surface, 2012 - connecting surface, 2013 - side surface, 2014 - recessed portion, 2015 - protruding portion, 300 - protrusion, 400 - groove, 401 - opening, 402 - bottom wall. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0058] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more than two, and at least one means one, two or more than two, unless otherwise clearly and specifically defined.

[0059] At present, the microstructure optical elements used to inhibit the development of myopia in adolescents can be roughly divided into myopic defocus, higher-order aberrations, and reduced retinal contrast based on the principle. The diameter of the microlenses set on the surface of most myopic defocus optical elements is greater than 1 mm, and there is a risk that the defocus signal in the pupil scanning range of the microstructure area will basically disappear. The principle of myopic defocus microstructure optical elements is that the light through the microlens converges in front of the retina, which can form myopic defocus signals in the periphery of the retina. Clinical evidence shows that such optical elements have the effect of slowing down the progression of myopia in adolescents compared with ordinary single-focus optical elements. However, there are also certain risks. This risk includes that when people with accommodative lag wear defocus microstructure optical elements, when reading near through the microstructure area, the adjustment is temporarily unable to keep up, resulting in the use of microlenses in the center of the macula to form fixation, and the peripheral clear vision may form reverse hyperopic defocus in the periphery of the retina and affect the effect. Another risk is that some clinical evidence shows that while microstructure defocus optical elements successfully inhibit the progression of myopia in adolescents, they promote the growth of astigmatism, and this consequence may be caused by frequent image jumps formed by repeated conversion of sight between the clear vision area and the microlens area. In addition, most microstructured optical elements designed using the contrast principle use dense opaque hole structures to reduce retinal contrast, which not only has certain appearance defects but also cannot conveniently quantize and modulate optical signals.

[0060] Based on this, it is necessary to provide an optical element and an imaging intervention device to solve the above-mentioned problems.

[0061] See also Figure 1 and Figure 2An optical element comprises a body 10 and a plurality of microstructure units 201, wherein the body 10 has a radial direction X and a thickness direction Y perpendicular to the radial direction X, and the body 10 comprises a first optical surface 101 and a second optical surface 102 opposite to each other along the thickness direction Y; the plurality of microstructure units 201 are arranged on the body 10, and the plurality of microstructure units 201 are arranged along the radial direction X; the microstructure unit 201 comprises an adjustment surface 2011, and the adjustment surface 2011 is arranged at intervals with at least one of the first optical surface 101 and the second optical surface 102 in the thickness direction Y; the surface roughness Ra μm of the adjustment surface 2011 satisfies: 0.012≤Ra≤100; the adjustment surface 2011 is used to cause diffuse reflection and aggravate energy loss when light is incident, and the light cannot be completely focused at any position after passing through the adjustment surface 2011, so as to interfere with imaging quality.

[0062] It can be understood that by providing the microstructure unit 201 with an adjustment surface 2011 that produces diffuse reflection, the light passing through the microstructure unit 201 cannot be focused, ensuring that the human eye cannot directly form a gaze through the microstructure unit 201, thereby not interfering with the imaging quality in the form of low-order aberrations, but interfering with the development of refractive errors in the form of energy loss caused by light passing through the transparent microstructure unit 201.

[0063] It should be noted that diffuse reflection is a phenomenon in which when light is irradiated onto a rough surface, the light is reflected by the irregular microstructure of the surface and is scattered uniformly in all directions. When the surface roughness Raμm of the adjustment surface 2011 satisfies the range of 0.012≤Ra≤100, the above-mentioned diffuse reflection is more likely to be formed. Unlike the mirror reflection when light is irradiated onto a smooth surface, diffuse reflection causes the light to be randomly scattered in all directions. The reason for diffuse reflection on a curved surface is that the curved surface has an irregular microstructure. These microstructures may be rough, uneven or irregular surface morphology. When light is irradiated onto such a curved surface, the light interacts with the microstructure of the curved surface, causing the light to be evenly scattered instead of being reflected out according to the traditional mirror reflection law. Since diffuse reflection causes the light to be evenly scattered in all directions, it makes it impossible for the light passing through the microstructure unit to be completely focused at any position. Therefore, when the light passes through a curved surface that causes the light to be diffusely reflected, due to the effect of light scattering, no matter where the light is incident from the microstructure unit, it cannot be focused and imaged by adjusting the propagation direction of the light. This results in the inability to intervene in the imaging quality in the form of conventional low-order aberrations, and the need to intervene in the development of refractive errors through other mechanisms, such as intervention in the form of energy loss. In addition, the form of energy loss can intervene in the development of refractive errors because the reflection and scattering of light when passing through the microlens causes energy loss. These reflection and scattering processes will cause the propagation direction and intensity of the light to change, thereby changing the focusing performance of the light.

[0064] In some embodiments, the radial direction X and the thickness direction Y are Figure 2 Direction indicated by the arrow.

[0065] See also Figure 3 The microstructure unit 201 is a protrusion 300, and the surface of the protrusion 300 away from the body 10 is an adjustment surface 2011, and the adjustment surface 2011 is located on the side of the first optical surface 101 away from the second optical surface 102 and / or the adjustment surface 2011 is located on the side of the second optical surface 102 away from the first optical surface 101; the microstructure unit 201 also includes a connecting surface 2012 and a side surface 2013, and the connecting surface 2012 is connected to the first optical surface 101 and / or the second optical surface 102 The adjustment surface 2011 is arranged opposite to the connecting surface 2012 in the thickness direction Y; the side surface 2013 is located between the adjustment surface 2011 and the connecting surface 2012 and is respectively connected to the adjustment surface 2011 and the connecting surface 2012; the adjustment surface 2011, the connecting surface 2012 and the side surface 2013 jointly enclose a protrusion 300; wherein the adjustment surface 2011 has a recessed portion 2014 facing the connecting surface 2012 and a protruding portion 2015 away from the connecting surface 2012 in the thickness direction Y.

[0066] It should be noted that Figure 3 The microstructure unit 201 in the figure is a structure protruding from the surface of the body 10, which can be understood as a lens structure such as a convex point or a convex block, and the adjustment surface 2011 at this time is a surface on the microstructure unit 201 away from the body 10. Specifically, the microstructure unit 201 can be arranged on the first optical surface 101, or on the second optical surface 102, or on both the first optical surface 101 and the second optical surface 102. At the same time, in order to enable the adjustment surface 2011 to produce diffuse reflection, the adjustment surface 2011 has a recessed portion 2014 and a protruding portion 2015. The presence of the recessed portion 2014 and the protruding portion 2015 makes the adjustment surface 2011 a surface with a certain roughness. When the light passes through the adjustment surface 2011, it will be reflected and scattered multiple times, resulting in a larger range of deviation and defocusing of the light. This will make it impossible for the light passing through the microstructure unit 201 to be completely focused at any position, so that a clear image will not be formed. This form of energy loss intervenes in the development of refractive errors, because the reflection and scattering of light during transmission and focusing causes energy loss when the light passes through the microlens. This form of intervention more directly affects the energy distribution and focusing performance of the light, thereby more effectively correcting refractive errors.

[0067] In some embodiments, see Figure 4The microstructure unit 201 is a groove 400, and the groove 400 has an opening 401 and a bottom wall 402 opposite to the opening 401; the bottom wall 402 is an adjustment surface 2011, and the adjustment surface 2011 is located between the first optical surface 101 and the second optical surface 102; the opening 401 passes through the first optical surface 101 and / or the second optical surface 102 along the thickness direction Y; the microstructure unit 201 also includes a side surface 2013, and the side surface 2013 is located between the adjustment surface 2011 and the first optical surface 102. The side surface 2013 is located between the adjustment surface 2011 and the second optical surface 102 and is respectively connected to the adjustment surface 2011 and the second optical surface 102; the side surface 2013 and the adjustment surface 2011 together enclose a groove 400; wherein the adjustment surface 2011 has a recessed portion 2014 facing the opening 401 and a protruding portion 2015 away from the opening 401 in the thickness direction Y.

[0068] It should be noted that Figure 4 The microstructure unit 201 in the embodiment is a groove 400 formed on the body 10, and the bottom wall 402 of the groove 400 is the adjustment surface 2011. Specifically, the opening 401 can penetrate the first optical surface 101, or the second optical surface 102, or the first optical surface 101 and the second optical surface 102 at the same time. At the same time, in order to enable the adjustment surface 2011 to produce diffuse reflection, the adjustment surface 2011 has a recessed portion 2014 and a protruding portion 2015. The presence of the recessed portion 2014 and the protruding portion 2015 makes the adjustment surface 2011 a curved surface with a certain roughness. When the light passes through the adjustment surface 2011, it will be reflected and scattered multiple times, resulting in a larger range of deviation and defocusing of the light. This will make it impossible for the light passing through the microstructure unit 201 to be completely focused at any position, so that a clear image will not be formed. This form of energy loss interferes with the development of refractive error, because the reflection and scattering phenomenon that occurs during the transmission and focusing of the light leads to energy loss when the light passes through the microlens. This form of intervention more directly affects the energy distribution and focusing properties of the light, allowing for more effective correction of refractive error.

[0069] Furthermore, when the microstructure unit 201 is a groove, it can be prepared by laser marking, and the wavelength of the laser used should be less than 1064 nm.

[0070] In some embodiments, the recessed portion 2014 and the protruding portion 2015 are arranged at intervals, or the protruding portion 2015 is at least connected to the recessed portion 2014. The arrangement of the recessed portion 2014 and the protruding portion 2015 determines the surface roughness of the adjustment surface 2011, which can increase the energy loss of the light and make it impossible to fully focus at any position.

[0071] In some embodiments, there are multiple recessed portions 2014 and multiple protruding portions 2015. The recessed portions 2014 and the protruding portions 2015 can be arranged in various forms, including: multiple protruding portions 2015 are connected to each other, multiple recessed portions 2014 are connected to each other, and one of the multiple protruding portions 2015 is connected to one of the multiple recessed portions 2014; or, multiple protruding portions 2015 are spaced apart from each other, multiple recessed portions 2014 are spaced apart from each other, and one of the multiple protruding portions 2015 is connected to multiple protruding portions 2015. One of the recessed portions 2014 is connected to each other; or, the plurality of protrusions 2015 are spaced apart from each other, the plurality of recessed portions 2014 are connected to each other, and one of the plurality of protrusions 2015 is connected to one of the plurality of recessed portions 2014; or, the plurality of protrusions 2015 are connected to each other, the plurality of recessed portions 2014 are spaced apart from each other, and one of the plurality of protrusions 2015 is connected to one of the plurality of recessed portions 2014; or, the recessed portions 2014 and the protrusions 2015 are alternately arranged and connected to each other. It can be understood that the arrangement of the recessed portion 2014 and the protruding portion 2015 is not limited to the above manner. Since the arrangement can be in various forms, the optical signal received by the visual center through the microstructure unit 201 becomes a complex optical signal other than defocus, and the impact of the signal on the retina is more inclined to a contrast change signal. However, unlike the optical element that uses the contrast principle to inhibit the progression of myopia, this embodiment has no restrictions on the microstructure unit 201, and a transparent structure can be used. It has advantages in the appearance of the optical element and can conveniently quantize and modulate the optical signal.

[0072] In some embodiments, the shape of the adjustment surface 2011 is wavy or sawtooth, both of which are shapes that cannot completely focus the light at any position and thus produce diopter. This allows the optical element to diffusely reflect the light by setting a special adjustment surface 2011 structure, thereby preventing the light from focusing through the microstructure area. By increasing sufficient intervention signals through the microstructure, the optical system can be effectively intervened to correct refractive errors.

[0073] In some embodiments, the adjustment surface 2011 is a curved surface with alternating positive and negative curvatures. The alternating positive and negative curvatures specifically refer to the alternation of the curvature of the adjustment surface 2011, and curvature is a concept that describes the degree of curvature of the surface. Positive curvature means that the surface is more prominent at this position, similar to a convex surface, and in these areas, the microstructure unit 201 can converge light. Negative curvature means that the surface is more concave at this position, similar to a concave surface, and in these areas, the microstructure unit 201 will disperse the light and make it diverge. At the same time, because the microstructure unit has the above characteristics, the optical element can perform defocus compensation according to individual differences in the retinal periphery to a certain extent.

[0074] In some embodiments, the diffuse reflection coefficient of the adjustment surface 2011 when generating diffuse reflection is: , diffuse reflectance Further satisfaction: 0.17< ≤0.6, and ;

[0075] in, represents the normalized value of the surface roughness of the adjustment surface 2011 , and α represents the maximum angle between the line connecting the vertex of the protrusion 2015 and the side surface 2013 and the cross section of the microstructure unit 201 in the thickness direction.

[0076] It should be noted that the diffuse reflectance Used to indicate the degree of energy loss, when the diffuse reflectance Satisfy 0.17< When the value is within the range of ≤0.6, more light can be reduced from entering the human eye, thereby ensuring that the diffuse reflection of light formed on the adjustment surface 2011 can aggravate energy loss.

[0077] In addition, the normalized value of surface roughness It can be calculated by the following formula:

[0078] ;

[0079] Ra represents the surface roughness and satisfies the following expression:

[0080] ;

[0081] in, is the fitting curve expression of the microstructure unit 201 in the plane, d is the diameter of the microstructure unit 201. In practical applications, the surface roughness Ra ranges from 0.012 to 100, usually any one of 0.012, 0.025, 0.05, 0.1, 0.2, 0.4, 0.8, 1.6, 3.2, 6.3, 12.5, 25, 50, 60, 70, 80, 90, 100 or the range between any two values, and the unit is μm.

[0082] Furthermore, the preferred range of the surface roughness Ra is 0.012-50 μm; further, the preferred range of the surface roughness Ra is 6.3-50 μm.

[0083] In some embodiments, The value of is at least of times and times or less.

[0084] In some embodiments, when the microstructure unit 201 is a protrusion 300, α further satisfies: 6.25×10 -4 ≤tanα / (N+1)≤0.10, where N represents the number of times the curvature sign of the adjustment surface 2011 changes, and the range of N is an integer between 1 and 15.

[0085] In some embodiments, when the microstructure unit 201 is a groove 400, α further satisfies: 2.5×10 -4 ≤tanα / (N+1)≤0.20, where N represents the number of times the curvature sign of the adjustment surface 2011 changes, and the range of N is an integer between 1 and 15.

[0086] It should be noted that the number of curvature sign changes N refers to the number of times the sign of the curvature (positive curvature or negative curvature) on the curve or surface changes. The number of curvature sign changes is used to indicate the shape characteristics of the surface and the number of concave and convex areas. It is understood that further reference is made to Figure 3 and Figure 4 , α is the angle shown in the figure, and α is used to indicate the height of the protrusion 2015. Different heights also determine the diffuse reflection effect of the adjustment surface 2011. When α meets the above range requirements, it can further ensure that the diffuse reflection formed by the adjustment surface 2011 can aggravate the energy loss of light.

[0087] In some embodiments, see further Figure 3 or Figure 4 , the protrusion 2015 and the surface of the main body 10 have a maximum height h μm in the thickness direction Y; the angle between the side 2013 and the surface of the main body 10 is β; the diameter of the microstructure unit 201 is dmm; the optical element further satisfies: h=(tanα+0.5tanβ)d / (N+1); wherein N represents the number of times the curvature sign of the adjustment surface 2011 changes, and the range of N is an integer between 1 and 15.

[0088] It can be understood that h, β and d can characterize the overall size structure of the microstructure unit 201. When the range of h=(tanα+0.5tanβ)d / (N+1) is satisfied, the possibility of forming a clear gaze through the microstructure unit 201 is eliminated, thereby avoiding the risk of forming reverse hyperopic defocus that aggravates the development of myopia.

[0089] In some embodiments, the optical element satisfies: 0.01°≤α≤75°. For example, when the microstructure unit 201 is a protrusion 300, it satisfies: 0.04°≤α≤58°; when the microstructure unit 201 is a groove 400, it satisfies: 0.014°≤α≤73°.

[0090] In some embodiments, the optical element satisfies: 70°≤β≤90°. For example, when the microstructure unit 201 is a protrusion 300, it satisfies: 72°≤β≤90°; when the microstructure unit 201 is a groove 400, it satisfies: 84°≤β≤90°.

[0091] In some embodiments, the optical element satisfies: 0.1≤h≤20. For example, when the microstructure unit 201 is a protrusion 300, it satisfies: 0.1≤h≤10; when the microstructure unit 201 is a groove 400, it satisfies: 0.5≤h≤20.

[0092] In some embodiments, see further Figure 3 or Figure 4 The side surface 2013 has a maximum dimension Hmm in the thickness direction Y, satisfying: 0.5≤H≤10. The dimension H of the side surface 2013 ensures that the height of the protrusion 300 or the depth of the groove 400 is within a reasonable range, thereby further maintaining the structural performance of the microstructure unit 201.

[0093] In some embodiments, see Figure 1 The body 10 further includes an optical center 103. When the body 10 is circular, the optical center 103 is the geometric center of the circle. It is understandable that the microstructure units 201 may be an annular structure surrounding the optical center 103. In each annular structure, the microstructure units 201 are spaced apart from each other.

[0094] In some embodiments, Figure 1 As shown, the microstructure units 20 are spaced apart from each other to form a mesh structure.

[0095] In some embodiments, the microstructure units 201 may be closely arranged with each other. It can be understood that closely arranged specifically means that the microstructure units 201 are at least connected to each other. For details, see Figure 5 and Figure 6 , Figure 5 The mesostructure units 201 are connected to each other to form a network structure. Figure 6 In the embodiment, the microstructure units 201 are connected to form a ring structure.

[0096] In some embodiments, the distance between adjacent microstructure units 201 is D mm, the diameter of the microstructure unit 201 is d mm, and the following is satisfied: 0.3≤2D+3d≤4. It is understandable that when the range of 0.3≤2D+3d≤4 is satisfied, the image jump caused by the frequent switching of the line of sight between the microstructure and the clear vision area can also be reduced, thereby reducing the risk of astigmatism progression for some wearers.

[0097] In some embodiments, the diameter d mm of the microstructure unit 201 further satisfies: 0.05≤d≤1; for example, d can be any value of 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, or a range between any two values.

[0098] In some embodiments, the distance between adjacent microstructure units 201 is D mm, further satisfying: 0≤D≤1; for example, D can be any one of 0mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, or a range between any two values. When D is 0mm, it means that the microstructure units 201 are connected to each other, and when D is greater than 0mm, the microstructure units 201 are spaced apart from each other. By limiting the distance between adjacent microstructure units 201, there are always more than 4 microstructure units 201 in any direction within the range of the pupil scan of the human eye in the area of ​​the microstructure unit 201, ensuring that a sufficient amount of intervention signals act on the periphery of the retina.

[0099] In some embodiments, the first optical surface 101 and the second optical surface 102 are at least one of a spherical surface, an aspherical surface, and a surface designed to reduce paracentral hyperopic defocus; when the first optical surface 101 and the second optical surface 102 are spherical surfaces, the area outside the center has a refractive power equal to that of the center; when at least one of the first optical surface 101 and the second optical surface 102 is an aspherical surface or a surface designed to reduce paracentral hyperopic defocus, the refractive power of the periphery is less than the refractive power of the central clear vision area, the aspherical surface has the function of improving the clarity of the peripheral field of vision and reducing the oblique axis aberration, and the design to reduce paracentral hyperopic defocus has the function of correcting or reducing the hyperopic defocus on the retina.

[0100] In some embodiments, the microstructure units 201 are distributed in a region three millimeters away from the optical center 103 of the body 10 .

[0101] In some embodiments, the shape of the microstructure unit 201 is one or more of a circle, an ellipse, a regular polygon, and a rectangle.

[0102] In some embodiments, the optical element can be cast or injection molded by a metal mold, or cast and molded by a glass mold into a desired prescription light intensity or semi-finished product, and the semi-finished product is then processed by a workshop to obtain the desired prescription optical focal length, that is, the optical element can be an optical lens. In some embodiments, the optical element can also be made into the desired prescription light intensity or semi-finished product by a metal and glass mold using a UV light curing process, and the semi-finished product is then processed by a workshop to obtain the surface of the blank to obtain the optical element required by the wearer, or an optical element or optical element blank made by a bonding process.

[0103] In some embodiments, the surface of the main body 10 is generally also provided with a thin film, and the microstructure unit 201 is configured on at least one surface of the film. The film includes, for example, a hydrogel film, a soft film, an optical plastic, and is configured on any surface of the imaging intervention device by electrostatic attraction, magnetic attraction, a clip, or the like.

[0104] In some embodiments, the material of the optical element includes a polymer material or an inorganic non-metal material. The polymer material includes a thermoplastic resin or a thermosetting resin, and the inorganic non-metal material includes glass, etc. Thermoplastic resins include polycarbonate or polymethyl methacrylate; thermosetting resins include any one of acrylic resins, episulfide resins, thiourethane resins, allyl resins, and polyurethanes.

[0105] In some embodiments, a coating film is formed on the surface of at least one side of the optical element, and the coating film includes a transparent coating film that increases the light transmittance of the optical element, a hard coating film that increases the durability of the optical element, a reflective film that blocks harmful light, an anti-reflection and anti-reflection film that realizes imaging visibility, a polarizing film with a color-changing function, or other color-changing films doped with ultraviolet-sensitive materials, etc. The coating film itself can have different colors, and the visual color under the reflection condition can be green, blue, yellow, purple, etc., or other colors.

[0106] In some embodiments, the optical element is directly prepared by a mold, and the mold may include an upper mold base and a lower mold base. The working surface of the upper mold base is a concave surface, which is used to mold the first optical surface 101 and the second optical surface 102 respectively.

[0107] In some embodiments, the optical element obtained by the above process can be combined with a frame to further obtain an imaging intervention device, such as glasses, etc. The shape of the optical element can be circular, square, elliptical or other special-shaped structures. It should be noted that the shape of the optical element can be roughly the above shape and is not limited to a perfect geometric shape.

[0108] Example

[0109] The embodiments of the present application can further modulate the optical energy signal falling on the retina through the microstructure by changing the vertex curvature (α changes accordingly) and diameter of the microstructure unit 201.

[0110] The roughness Ra is selected as 0.8 μm, the height h is set to 10 μm, and when N is 2, the diffuse reflectance coefficients of the following different microstructures are calculated.

[0111] The adjustment surface 2011 is a diffuse reflection structure of this embodiment, which satisfies: 16.7≤α≤58, and is brought into Result: 0.176< ≤0.564.

[0112] At the same time, spherical and aspherical structures are used for comparison. Under the above conditions, the spherical surface satisfies: 0<α≤11.3, so The range is 0.162< ≤0.168; Aspheric surface satisfies: 0<α≤14.1, so The range is 0.162< ≤0.172. It can be seen from this that when the adjustment surface 2011 is a diffuse reflection structure, it can be ensured that the energy loss of light is aggravated so that it cannot be fully focused at any position.

[0113] The diameter of the microstructure unit 201 of this embodiment is 0.8 mm, the minimum distance between it and the optical center 103 is 3.0 mm, and the distance between adjacent microstructure units 201 is 0.5 mm. The adjustment surface 2011 in the embodiment has the characteristic of causing diffuse reflection of light when incident, resulting in energy loss, and is specifically not limited to the surface shape with curvature changes such as wavy and sawtooth. The wavy surface shape is used for simulation in this simulation, and its schematic diagram is shown as follows Figure 7 As shown, a parallel light beam is imaged on the retina through a microstructure optical element-human eye system, and a rectangular detector is set to fit the retina to measure the energy loss of the light.

[0114] Figure 8 Schematic diagram of the scattering function of a conventional spherical microstructure optical element-human eye system during imaging, wherein the peak illumination parameter is 1.7505 watts / square centimeter and the total power is 1.0610E-01 watt; Fig. 9 for Figure 7 The corresponding optical element-human eye system imaging scattering function diagram, where the peak illumination parameter is 1.7222 watts / square centimeter, the total power is 1.0059E-01 watt, and Figure 8 Compared with the model imaging, Fig. 9The peak illuminance of the model decreased by 0.0283 watts per square centimeter, and the total power decreased by 0.0551 watts, indicating that the scattering phenomenon of the optical element provided in the embodiment of the present application is more obvious, aggravating the energy loss in the process of light propagation, thereby achieving the intervention of myopia progression in the form of energy loss caused by diffuse reflection when light passes through a transparent microstructure.

[0115] View also Figure 8 and Fig. 9 The contrast loss of the two models corresponds to Fig.10 , Fig.11 As shown in the figure, contrast refers to the brightness contrast between the brightest and darkest parts of the image on the retina, and the size of each circle in the figure represents the degree of contrast loss. Fig.10 The average circular area is Fig.11 is large, so Fig.10 The contrast loss ratio of the corresponding conventional microstructure optical element is Fig.11 The corresponding embodiment provides more optical elements, and the performance of the optical elements corresponding to this embodiment is better than that of conventional microstructure optical elements. The energy loss generated by the adjustment surface 2011 of the microstructure unit 201 in the embodiment of the present application can further reduce the generated contrast, and can more effectively intervene in the imaging quality of the retina. Moreover, the embodiment of the present application is different from designing optical elements with a contrast adjustment mechanism, and can further improve the overall aesthetics of the optical elements.

[0116] The above is a detailed introduction to an optical element and an imaging intervention device provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. An optical element, characterized in that: include: A body, the body having a radial direction and a thickness direction perpendicular to the radial direction, the body comprising a first optical surface and a second optical surface opposite to each other along the thickness direction; A plurality of microstructure units, wherein the plurality of microstructure units are arranged on the body and arranged along the radial direction; the microstructure unit comprises an adjustment surface, wherein the adjustment surface is spaced apart from at least one of the first optical surface and the second optical surface in the thickness direction; the surface roughness Ra μm of the adjustment surface satisfies: 0.012≤Ra≤100; the adjustment surface is used to cause diffuse reflection and aggravate energy loss when light is incident, and light cannot be completely focused at any position after passing through the adjustment surface, thereby interfering with imaging quality; When the microstructure unit is a protrusion, the surface of the protrusion away from the body is the adjustment surface, and the microstructure unit further includes a connecting surface and a side surface, and the adjustment surface, the connecting surface and the side surface together enclose the protrusion; the adjustment surface has a recessed portion facing the connecting surface and a protruding portion away from the connecting surface in the thickness direction; Satisfaction: 6.25×10 -4 ≤tanα / (N+1)≤0.10; When the microstructure unit is a groove, the groove has an opening and a bottom wall opposite to the opening; the bottom wall is the adjustment surface, the microstructure unit further includes a side surface, and the side surface and the adjustment surface together enclose the groove; the adjustment surface has a concave portion facing the opening and a convex portion away from the opening in the thickness direction; Satisfaction: 2.5×10 -4 ≤tanα / (N+1)≤0.20; Wherein, α represents the maximum angle between the line connecting the vertex of the protrusion and the side surface and the cross section of the microstructure unit in the thickness direction, N represents the number of times the curvature sign of the adjustment surface changes, and the range of N is 1 to 15.

2. The optical element according to claim 1, characterized in that When the microstructure unit is a protrusion, the adjustment surface is located on a side of the first optical surface away from the second optical surface and / or the adjustment surface is located on a side of the second optical surface away from the first optical surface; The connecting surface is connected to the first optical surface and / or the second optical surface, and the adjusting surface is arranged opposite to the connecting surface in the thickness direction; the side surface is located between the adjusting surface and the connecting surface and is connected to the adjusting surface and the connecting surface respectively.

3. The optical element according to claim 1, characterized in that When the microstructure unit is a groove, the adjustment surface is located between the first optical surface and the second optical surface; the opening passes through the first optical surface and / or the second optical surface along the thickness direction; The side surface is located between the adjustment surface and the first optical surface and is respectively connected to the adjustment surface and the first optical surface and / or the side surface is located between the adjustment surface and the second optical surface and is respectively connected to the adjustment surface and the second optical surface.

4. The optical element according to claim 2 or 3, characterized in that: The recessed portion and the protruding portion are arranged at intervals; or, The protruding portion is at least connected to the recessed portion.

5. The optical element according to claim 4, characterized in that There are a plurality of the concave parts, and a plurality of the convex parts; The plurality of protrusions are connected to each other, the plurality of recesses are connected to each other, and one of the plurality of protrusions is connected to one of the plurality of recesses; or The plurality of protrusions are spaced apart from each other, the plurality of recesses are spaced apart from each other, and one of the plurality of protrusions is connected to one of the plurality of recesses; or The plurality of protrusions are spaced apart from each other, the plurality of recesses are connected to each other, and one of the plurality of protrusions is connected to one of the plurality of recesses; or The plurality of protrusions are connected to each other, the plurality of recesses are spaced apart from each other, and one of the plurality of protrusions is connected to one of the plurality of recesses; or The recessed portions and the protruding portions are alternately arranged and connected to each other.

6. The optical element according to claim 1, characterized in that The shape of the adjustment surface is wavy or sawtooth; or The adjustment surface is a curved surface with alternating positive and negative curvatures.

7. The optical element according to claim 1, characterized in that The diffuse reflection coefficient when the adjustment surface produces diffuse reflection is: , the diffuse reflectance Further satisfaction: 0.17< ≤0.6, and ; in, represents the normalized value of the surface roughness of the adjustment surface, and , for of times and times or less.

8. The optical element according to claim 1, characterized in that The protrusion and the surface of the body have a maximum height h μm in the thickness direction; the angle between the side and the surface of the body is β; the diameter of the microstructure unit is d mm; the optical element further satisfies: h=(tanα+0.5tanβ)d / (N+1).

9. The optical element according to claim 8, characterized in that The optical element satisfies at least one of the following characteristics: a）0.01°≤α≤75°； b）70°≤β≤90°； c) 0.1≤h≤20.

10. The optical element according to claim 1, characterized in that The microstructure units are arranged spaced apart from each other; or The microstructure units are closely arranged with each other.

11. The optical element according to claim 10, characterized in that The distance between adjacent microstructure units is D mm, the diameter of the microstructure unit is d mm, and the following conditions are satisfied: 0.3≤2D+3d≤4; or 0.05≤d≤1; or 0≤D≤1。 12. An imaging intervention device, characterized in that: The imaging intervention device comprises an optical element as claimed in any one of claims 1-11.

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