Lens with optical path difference regulation and control structure

Abstract

The utility model provides an optical path difference regulation structure lens, and relates to the field of optical lenses, the lens comprises a lens body and a lens part, the lens body comprises a convex surface and a concave surface opposite to each other; the lens part is adjacent to the concave surface of the lens body, the lens part comprises a micro-lens array, and the micro-lens array comprises a plurality of micro-lenses which are sequentially arranged to form an ultra-microstructure area; the micro lens is of a nanoscale diffraction structure and has the effective haze not exceeding 15% so as to reduce the spatial frequency and the imaging degree of incident light in the ultra-microstructure area. According to the invention, multiple functions of defocus optimization design, contrast control, spatial frequency modulation and the like are integrated; the effective defocusing amount of the ultrastructure is larger, and the ultra-low disturbance amount is achieved; and the haze of the micro lens is controlled at a nano level, so that a high-fidelity optical effect can be provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical lenses, in particular to an optical path difference regulation structure lens. BACKGROUND

[0002] Myopia prevention lenses change the retinal growth signal by imaging peripheral light at a specific position in front or behind the retina, thereby delaying the growth of the eye axis. In related technologies, myopia prevention lenses are mostly developed based on DOT, DIMS and DISC technologies; among them, DOT lenses are developed based on retinal contrast signal theory, DISC is a soft corneal contact technology, and is mostly used in contact lenses; DIMS is a myopia prevention lens based on peripheral defocus theory, and DIMS lenses and DISC lenses rely on defocus control. The myopia prevention lenses in related technologies have poor optical fidelity due to insufficient contrast control, and the performance of the myopia prevention lenses still needs to be improved, and a new type of structure lens is urgently needed to meet the growing demand for myopia prevention. CONTENT OF THE INVENTION

[0003] In view of the deficiencies of the prior art, the present application provides an optical path difference regulation structure lens, which solves the problem of poor optical fidelity of the current myopia prevention lens due to insufficient contrast control.

[0004] To achieve the above purpose, the present application is implemented by the following technical solutions:

[0005] The optical path difference regulation structure lens provided by the embodiment of the present application includes a lens body and a lens part, the lens body includes opposite convex and concave surfaces; the lens part is adjacent to the concave surface of the lens body, and the lens part includes a microlens array, the microlens array includes a plurality of microlenses arranged in sequence to form a supermicrostructure region; wherein the microlens is a nanoscale diffractive structure and has an effective haze of not more than 15% to reduce the spatial frequency and imaging degree of incident light in the supermicrostructure region; the side of the lens part away from the concave surface is a plane and the target distance between the concave surface gradually changes along the first direction, the plurality of microlenses are stacked along the first direction and the number of microlenses in each layer is positively correlated with the corresponding target distance.

[0006] According to the first aspect of the embodiment of the present application, the defocus amount De of the microlens satisfies: +4.50D≤De≤+10.00D, wherein D represents diopter and +10.00D is the extreme defocus; the microlens reaches the extreme defocus within an 8° field of view, and the defocus amount of the microlens is positively correlated with the field of view.

[0007] According to a first aspect of the embodiments of the present application, the lens material of the microlenses comprises resin, the haze control of the microlenses corresponds to nanoscale, and each microlens has an equivalent light scattering effect to realize contrast control through optical path difference regulation.

[0008] According to the first aspect of the embodiments of the present application, in each layer of microlenses, the plurality of microlenses in the same row and the plurality of microlenses in the same column are aligned along the second direction and the third direction, respectively.

[0009] According to the first aspect of the embodiments of the present application, in each layer of microlenses, the plurality of microlenses in the same row and the plurality of microlenses in the same column are aligned along the second direction and the third direction, respectively.

[0010] According to the first aspect of the embodiments of the present application, in each layer of microlenses, the plurality of microlenses in the same row and the plurality of microlenses in the same column are aligned along the second direction and the third direction, respectively.

[0011] According to the first aspect of the embodiments of the present application, the first fixed distance and the second fixed distance are equal, and the central region to the peripheral region of the optical path difference regulation structure lens is regulated, and the width size range of the lens part is 5mm-75mm.

[0012] According to the first aspect of the embodiments of the present application, the number of microlenses in the lens part is more than 17436, the size range of the microlenses is 0.01mm-0.15mm, and the unit area of the lens part is arranged with a large number of microlenses to realize high-intensity optical path difference regulation.

[0013] According to the first aspect of the embodiments of the present application, the lens part further comprises a filler composed of a high polymer material, the filler is arranged in the gap between the plurality of microlenses and is integrally formed with the microlens array, and the high polymer material comprises resin.

[0014] According to the first aspect of the embodiments of the present application, the process adopted by the microlenses is at least one of pasting and printing, and the optical path difference regulation structure lens realizes stable defocus overexposure and maximum defocus integration of the macular region from the central region to the peripheral region through the plurality of microlenses.

[0015] The present application provides an optical path difference regulation structure lens. Compared with the prior art, the following beneficial effects are achieved:

[0016] The lens part is arranged on one side of the lens body, and the lens part is in abutment with the concave surface of the lens body. The lens part can form a super microstructure region on one side of the lens body by arranging a plurality of microlenses arranged in sequence. One side of the super microstructure region is formed as a plane, and the distance between the plane and the concave surface of the lens body is not a fixed value. The plurality of microlenses in the super microstructure region are arranged in layers. The number of microlenses in each layer is positively correlated with the corresponding target distance, that is, the microlenses are arranged in corresponding numbers according to the size of the accommodation space to achieve the effect of uniform distribution. The microlenses in the application are nanoscale diffractive structures with an effective haze of not more than 15%, which can reduce the spatial frequency and imaging degree of incident light in the super microstructure region. The effective defocusing amount of the super microstructure is larger, and has an ultra-low disturbance amount. The haze control of the microlenses uses nanoscale, which can provide high-fidelity optical effects. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 is a front view of a path difference regulation structure lens provided by an embodiment of the present application;

[0019] Figure 2 is a perspective view of a path difference regulation structure lens provided by an embodiment of the present application;

[0020] Figure 3 is a left view of a path difference regulation structure lens provided by an embodiment of the present application;

[0021] Figure 4 is a top view of a path difference regulation structure lens provided by an embodiment of the present application;

[0022] Figure 5 is Figure 1 B-B sectional view of

[0023] Figure 6 is Figure 1 A-A sectional view of

[0024] Figure 7 is Figure 1 a part a enlarged schematic view in

[0025] Figure 8 is Figure 5 a part b enlarged schematic view in

[0026] Figure 9is Figure 6 a c part in the enlarged view of the schematic diagram.

[0027] Reference signs: lens body 1; convex surface 11; concave surface 12; lens part 2; flat surface 21; filling piece 22; microlens 3; first direction X1; second direction X2; third direction X3. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0029] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0030] The embodiments of the present application provide an optical path difference regulation structure lens, and solve the problem of poor optical imaging effect caused by insufficient contrast control of current myopia prevention lenses.

[0031] The technical solutions in the embodiments of the present application are as follows to solve the above technical problems:

[0032] Myopia control lenses change the retinal growth signal by imaging peripheral light at a specific location in front or behind the retina, slowing down the axial growth. In the related art, myopia control lenses are mostly developed based on DOT, DIMS and DISC technology; among them, DOT lenses are developed based on retinal contrast signal theory, DISC is a soft corneal contact technology, and is mostly used in contact lens products; DIMS is a myopia control lens based on peripheral defocus theory, and DIMS lenses and DISC lenses rely on defocus control. The myopia control lenses in the related art will cause the optical fidelity effect to be unsatisfactory due to insufficient contrast control, and the performance of the myopia control lenses still needs to be improved, and a new type of structural lens is urgently needed to meet the growing demand for myopia control.

[0033] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the drawings in the specification and specific embodiments.

[0034] A light path difference regulation structure lens provided by an embodiment of the present application will be introduced below.

[0035] An embodiment of the present application provides a light path difference regulation structure lens, please refer to Figures 1-6 The light path difference regulation structure lens includes a lens body 1 and a lens part 2, the lens body 1 includes opposite convex surfaces 11 and concave surfaces 12; the lens part 2 is adjacent to the concave surface 12 of the lens body 1, the lens part 2 includes a microlens array, the microlens array includes a plurality of microlenses 3 arranged in sequence to form a super microstructure region; wherein the microlens 3 is a nanoscale diffractive structure and has an effective haze of not more than 15% to reduce the spatial frequency and imaging degree of incident light in the super microstructure region.

[0036] Specifically, the side of the lens part 2 away from the concave surface 12 is a plane 21 and the target distance between the plane 21 and the concave surface 12 gradually changes along a first direction X1, a plurality of microlenses 3 are arranged in layers along the first direction X1 and the number of microlenses 3 in each layer is positively correlated with the corresponding target distance.

[0037] It should be noted that the nanoscale diffractive structure is a structure with nanoscale characteristic size and based on the principle of light diffraction, the nanoscale diffractive structure has a periodicity accurately controlled at the nanoscale, and such a periodic structure can produce a specific diffraction effect on incident light, and the size of the period is related to the wavelength of the target light, generally within a certain proportion of the target wavelength, for example, within the range of 0.75 lambda to 3 lambda of the target wavelength lambda.

[0038] In the embodiments of the present application, it can be understood that the present application sets the lens part 2 on one side of the lens body 1, the lens part 2 is in contact with the concave surface 12 of the lens body 1, the lens part 2 can form a super microstructure region on one side of the lens body 1 by setting a plurality of micro lenses 3 arranged in sequence, and one side of the super microstructure region is shaped as a plane 21, the distance between the plane 21 and the concave surface 12 of the lens body 1 is not a fixed value; the plurality of micro lenses 3 in the super microstructure region are arranged in layers, the number of micro lenses 3 in each layer is positively correlated with the corresponding target distance, that is, the micro lenses 3 are arranged in corresponding numbers according to the size of the accommodation space to achieve the effect of uniform distribution.

[0039] It also needs to be explained that the micro lens 3 in the present application is a nano-level diffraction structure and has an effective haze of not more than 10%, which can reduce the spatial frequency and imaging degree of incident light in the super microstructure region. The effective defocus amount of the super microstructure is larger, has an ultra-low disturbance amount, has better compliance and better control effect; the haze control of the micro lens 3 adopts a nano level to provide a high-fidelity optical effect while reducing the imaging force.

[0040] In some embodiments, the defocus amount De of the micro lens 3 satisfies: +4.50D≤De≤+10.00D, wherein D represents diopter, and +10.00D is the extreme defocus; the micro lens 3 reaches the extreme defocus within an 8° field of view angle, and the defocus amount of the micro lens 3 is positively correlated with the field of view angle.

[0041] Further, the process adopted by the micro lens 3 is at least one of pasting and printing, the optical path difference regulation structure lens from the center to the peripheral region, through the plurality of micro lenses 3 to realize the stable defocus over and the maximum defocus integral of the macular area.

[0042] In the embodiments of the present application, it can be understood that the defocus amount increases with the increase of the field of view angle, the effective defocus amount of the super microstructure region is larger, has an ultra-low disturbance amount, has better compliance and better control effect; the present application optimizes the defocus design, which is more in line with the physiological characteristics of the human eye, and the effect of the macular area and the enhancement effect is better.

[0043] In some embodiments, the lens material of the micro lens 3 includes resin, the haze control of the micro lens 3 corresponds to a nano level, each micro lens 3 is equivalent and has a light scattering effect, so as to realize contrast control through optical path difference regulation.

[0044] In the embodiments of the present application, it can be understood that the optical path is a basic concept in the field of optics, and the optical path is defined as the product of the geometric path of light propagation and the refractive index of the medium, and the optical path difference is an important physical quantity that integrates the geometric distance of light propagation and the vibration of light waves. The present application can refract and converge light by setting the microlens 3, change the propagation path and optical path of the light; the refractive power of each microlens 3 can be independently configured, each microlens 3 has substantially the same focal point, and the nanoscale lens haze control can be achieved by setting a plurality of microlenses 3, and a high-fidelity optical effect can be provided.

[0045] In one example, please refer to Figure 7 、 Figure 8 and Figure 9 , the lens part 2 further comprises a filler 22 composed of a high polymer material, the filler 22 is arranged in the gap between the plurality of microlenses 3 and is integrally formed with the microlens array; the high polymer material includes resin; in addition, the lens body 1 can also be made of a high polymer material.

[0046] In some embodiments, please refer to Figure 1 、 Figure 7 、 Figure 8 and Figure 9 , in each layer of microlenses 3, the plurality of microlenses 3 in the same row and the plurality of microlenses 3 in the same column are aligned along the second direction X2 and the third direction X3, respectively. The corresponding adjacent two microlenses 3 in the 2i layer of microlenses 3 and the 2i-1 layer of microlenses 3 are aligned along the first direction X1 and are spaced apart by a preset first fixed distance, wherein i is a positive integer.

[0047] In the embodiments of the present application, it can be understood that, please refer to Figure 1 , the first direction X1 of the microlens 3 is arranged in multiple layers, and the adjacent two layers of microlenses 3 are uniformly spaced apart at a preset first fixed distance.

[0048] In other optional embodiments, please refer to Figure 1 、 Figure 7 、 Figure 8 and Figure 9 , in each layer of microlenses 3, the 2j row of microlenses 3 and the 2j-1 row of microlenses 3 are spaced apart at a preset second fixed distance; the 2k column of microlenses 3 and the 2k-1 column of microlenses 3 are spaced apart at a second fixed distance; wherein j and k are both positive integers.

[0049] In the embodiments of the present application, it can be understood that, please refer to Figure 1 , in each layer of microlenses 3, the microlenses 3 are uniformly spaced apart in the corresponding two-dimensional plane, and each row of microlenses 3 and each column of microlenses 3 are spaced apart by a preset second fixed distance.

[0050] In one example, the first fixed distance and the second fixed distance are equal, and the central to the peripheral region of the optical path difference regulation structure lens is regulated. The width of the lens portion 2 ranges from 5mm to 75mm. It should be noted that the above description is also applicable to Figure 1 and Figure 2 Figure 3 The central region of the lens portion 2, i.e. the 5mm wide region, is not provided with the microlens 3.

[0051] In the embodiments of the present application, it can be understood that the microlens is an ultramicro defocus lens, and the plurality of microlenses can be arranged in an orthogonal arrangement. Each microlens has a light scattering effect. It should be noted that the light scattering effect refers to the phenomenon that part of the light deviates from the original direction of propagation when encountering a non-uniform medium during propagation. Light outside the direction of propagation is called scattered light. Under the action of incident light, the medium molecules or impurities in the medium polarize and radiate secondary waves as secondary wave sources. In a completely pure and uniform medium, the phase relationship of each secondary wave source causes the light to propagate only in the direction that obeys the laws of geometric optics. When the medium is not uniform, the phase of each secondary wave is random, resulting in incoherence of the superposition result of the secondary waves, so that there is light intensity distribution in other directions in addition to the original incident light direction, forming light scattering.

[0052] By arranging a plurality of microlenses 3, the present application can change the propagation and scattering characteristics of the lens to the light, thereby adjusting the contrast of the light entering the eye to achieve a specific visual effect and physiological effect, which has a positive effect on the prevention and control of myopia. Under the action of a plurality of uniformly distributed microlenses 3, the contrast control function and the optical path difference regulation function can be realized at the same time.

[0053] In some embodiments, the number of microlenses 3 in the lens portion 2 exceeds 17436, and the size of the microlenses 3 ranges from 0.01mm to 0.15mm. A large number of microlenses 3 are arranged per unit area of the lens portion 2 to achieve high-intensity optical path difference regulation.

[0054] In the embodiments of the present application, it can be understood that a continuous ultralow disturbance defocus region is formed by more than 33000 microlenses 3. The size of the microlenses of the conventional myopia prevention and control lens is relatively large, typically ranging from 0.8mm to 2mm. By significantly reducing the size of the microlenses 3, the present application can accommodate more microlenses 3 per unit area, thereby achieving high-intensity optical path difference regulation and further achieving contrast control.

[0055] In summary, compared with the prior art, the present application has the following beneficial effects:

[0056] 1. The present application provides a lens portion on one side of the lens body, and a plurality of microlenses arranged in sequence can form an ultramicro structure region on one side of the lens body. The microlenses are arranged in a corresponding number according to the size of the accommodation space to achieve uniform distribution.

[0057] 2、The microlens provided by the application is a nanoscale diffractive structure and has an effective haze of no more than 10%, which can reduce the spatial frequency and imaging degree of incident light in the supermicrostructure area; and while reducing the imaging force, it provides high-fidelity optical effects.

[0058] 3、The application integrates multiple functions such as defocus optimization design, contrast control and spatial frequency modulation; the effective defocus amount of the supermicrostructure area is large, the haze control of the microlens adopts nanoscale, the defocus design is optimized, and it is more in line with the physiological characteristics of the human eye; under the action of multiple microlenses uniformly distributed, the contrast control function and the optical path difference regulation function can be realized at the same time.

[0059] The above embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. An optical path difference modulating structure lens, characterized by, Comprise: a lens body (1) comprising opposite convex (11) and concave (12) surfaces; and a lens portion (2) adjacent to the concave surface (12) of the lens body (1), the lens portion (2) comprising a microlens array comprising a plurality of microlenses (3) arranged in sequence to form a supermicrostructure region; wherein the microlenses (3) are nanoscale diffractive structures and have an effective haze of no more than 15% to reduce the spatial frequency and imaging degree of incident light in the supermicrostructure region; the lens portion (2) is flat (21) on the side away from the concave surface (12), and the target distance between the flat (21) and the concave surface (12) gradually changes in a first direction, the plurality of microlenses (3) are arranged in layers along the first direction, and the number of microlenses (3) in each layer is positively correlated with the corresponding target distance.

2. The optical path difference modulating structure lens according to claim 1, wherein, The defocus amount De of the microlenses (3) satisfies: +4.50D≤De≤+10.00D, wherein D represents diopter, and +10.00D is the extreme defocus; the microlenses (3) reach the extreme defocus within an 8° field of view, and the defocus amount of the microlenses (3) is positively correlated with the field of view.

3. The OPD-structured lens of claim 1, wherein, The lens material of the microlenses (3) comprises resin, the haze control of the microlenses (3) corresponds to nanoscale, and each microlens (3) has light scattering effect to realize contrast control through optical path difference regulation.

4. The OPD-tuned structure lens of any one of claims 1-3, wherein, In each layer of the microlenses (3), a plurality of microlenses (3) in the same row and a plurality of microlenses (3) in the same column are aligned in a second direction and a third direction, respectively.

5. The OPD-Modulated Lens of claim 4, wherein, The two corresponding adjacent microlenses (3) in the 2i-th layer and the 2i-1-th layer of the microlenses (3) are aligned in the first direction and spaced apart by a preset first fixed distance, wherein i is a positive integer.

6. The OPD-tuned structure lens of claim 5, wherein, In each layer of the microlenses (3), the 2j-th row of microlenses (3) and the 2j-1-th row of microlenses (3) are spaced apart by a preset second fixed distance; the 2k-th column of microlenses (3) and the 2k-1-th column of microlenses (3) are spaced apart by the second fixed distance; wherein j and k are both positive integers.

7. The OPD-structured lens of claim 6, wherein, The first fixed distance and the second fixed distance are equal, from the center to the peripheral region of the optical path difference regulation structure lens, the size range of the lens portion (2) is 5mm-75mm.

8. The OPD-tuned structure lens of any one of claims 1-3, wherein, The number of microlenses (3) in the lens portion (2) is more than 17436, the size range of the microlenses (3) is 0.01mm-0.15mm, and the unit area of the lens portion (2) is arranged with a large number of microlenses (3) to realize high-intensity optical path difference regulation.

9. The OPD-tuned-structure lens of any of claims 1-3, wherein, The lens portion (2) further comprises a filler (22) composed of a high molecular material, the filler (22) is arranged in the gap between the plurality of microlenses (3) and is integrally formed with the microlens array; the high molecular material comprises resin.

10. The OPD-tuned-structure lens of any one of claims 1-3, wherein, The microlenses (3) are implemented by at least one of the following processes: sticking and printing. The optical path difference regulating structure lens is from the central to the peripheral area, and the stable defocus overplus and the maximum defocus integration of the macula area are achieved by the plurality of microlenses (3).

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