Lens, camera module and electronic equipment

Abstract

The invention relates to a lens, a camera module and electronic equipment, and the lens comprises a substrate which is divided into N first subareas; the N structural unit arrays and the N first partitions are arranged in a one-to-one correspondence mode, each structural unit array comprises a plurality of nanorod structures arranged in the corresponding first partitions in an array mode, each structural unit array forms a super lens, and N is a positive integer larger than 1. Therefore, all the super lenses can be manufactured on the same substrate at the same time, the subsequent assembling process is not needed, so that no assembling tolerance exists between the super lenses, the algorithm performance is prevented from being influenced by the assembling tolerance, and the imaging effect can be effectively improved. And meanwhile, the thickness of the super lens is only in a micron dimension, so that the height of the camera module can be further reduced, and a lighter and thinner design can be realized.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic equipment, and in particular to a lens, a camera module and an electronic equipment. Background Art

[0002] In order to reduce the height of the camera module, multiple cameras are used in the camera of the electronic device to converge light. However, the use of multiple cameras has the problem of assembly tolerance, which reduces the imaging effect. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a lens, a camera module and an electronic device.

[0004] According to a first aspect of the present disclosure, a lens is provided, comprising: a substrate, on which N first partitions are divided; N structural unit arrays, which are arranged in a one-to-one correspondence with the N first partitions, each of the structural unit arrays comprises a plurality of nanocolumn structures arranged in an array corresponding to the first partition, and each of the structural unit arrays constitutes a superlens, wherein N is a positive integer greater than 1.

[0005] In some embodiments of the present disclosure, among the N structural unit arrays, at least two of the structural unit arrays have different arrangements of nano-pillar structures and / or different sizes of nano-pillar structures.

[0006] In some embodiments of the present disclosure, at least two of the metalenses operate in different wavelength bands.

[0007] In some embodiments of the present disclosure, the union of the operating bands of the various metalenses covers the visible light band.

[0008] In some embodiments of the present disclosure, N metalenses formed by N structural unit arrays include lenses of type 1 to type n, where n is a positive integer less than or equal to N, and lenses of different types have different working bands; N=2, n=2, the maximum value of the working band of the lens of type 1 is greater than the minimum value of the working band of the lens of type 2 and less than the maximum value of the working band of the lens of type 2; N is greater than 2, and the minimum and maximum values ​​of the working bands of lenses of type 1 to type n gradually increase, and the working bands of lenses of adjacent types overlap.

[0009] In some embodiments of the present disclosure, N=4, the shapes of the four first partitions are all rectangular, and the four first partitions are spliced ​​together to form a rectangle, and the four first partitions respectively constitute the four corner areas of the rectangle, and the working bands of two super lenses formed by the structural unit arrays in two first partitions at one diagonal corner are the same, and the working bands of two super lenses formed by the structural unit arrays in two first partitions at another diagonal corner are different.

[0010] In some embodiments of the present disclosure, the working bands of two superlenses with the same working band are both green light bands; among the two superlenses with different working bands, the working band of one of the superlenses is the red light band, and the working band of the other superlens is the blue light band.

[0011] According to a second aspect of the present disclosure, a camera module is provided, comprising a photosensitive element and at least one lens as described above, wherein the lens is arranged on a photosensitive side of the photosensitive element.

[0012] In some embodiments of the present disclosure, the camera module also includes a filter, which is arranged between the photosensitive element and the superlens; the filter is provided with second partitions corresponding one-to-one to the first partitions, and the band range of each second partition corresponds to the working band of the corresponding superlens.

[0013] In some embodiments of the present disclosure, the filter is rectangular and is divided into four second partitions, and the four second partitions are respectively located at the four corners of the rectangle. The band ranges of two of the second partitions at one diagonal corner are both green light bands, and the band ranges of two of the second partitions at the other diagonal corner are red light band and blue light band, respectively.

[0014] According to a third aspect of the present disclosure, there is provided an electronic device, comprising the camera module as described above, the electronic device further comprising a control module, the control module being connected to the camera module, the control module being configured to synthesize the imaging of each of the super lenses.

[0015] In some embodiments of the present disclosure, the control module is further configured to determine the object distance of the photographed object based on the imaging of at least two of the N super lenses.

[0016] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0017] In the lens provided by the present disclosure, structural unit arrays are respectively formed in a plurality of first partitions of a substrate, and each structural unit array constitutes a metalens. In this way, each metalens can be simultaneously manufactured on the same substrate using high-precision manufacturing processes such as etching, imprinting, and photolithography, without the need for subsequent assembly processes, so that there is no assembly tolerance between metalens, avoiding the impact of assembly tolerance on algorithm performance, thereby effectively improving the imaging effect. At the same time, since the thickness of the metalens is only in the micron order, the height of the camera module can be further reduced, which is conducive to achieving a lighter and thinner design.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] Figure 1 It is a structural schematic diagram of a camera module in a related technology;

[0021] Figure 2 It is a structural schematic diagram of a camera module in a related technology;

[0022] Figure 3 is a schematic structural diagram of a lens according to an exemplary embodiment;

[0023] Figure 4 It is a schematic structural diagram of a camera module according to an exemplary embodiment.

[0024] In the figure:

[0025] 1-lens; 11-substrate; 111-first partition; 112-structural unit array; 2-filter; 21-second partition; 3-photosensitive element; 4-lens; 5-camera module. DETAILED DESCRIPTION

[0026] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0027] For example, the camera on electronic devices such as mobile phones and tablets usually uses a lens (such as Figure 2 As shown in the figure, with the improvement of the imaging quality of the camera, the height of the camera module is also increasing, which leads to the increasing size of the electronic device and affects the user's grip.

[0028] In order to reduce the height of the camera module, the camera module of the electronic device uses multiple smaller lenses to replace a larger lens. For example, Figure 1 As shown, four smaller lenses 4 are used to synthesize the images generated by each lens 4 into one image through a super-resolution algorithm to restore the image as shown in FIG. Figure 2 The imaging effect when the camera module 5 is shown adopts a larger lens 4. Exemplarily, the super-resolution algorithm may be, for example, a deep learning algorithm, an image fusion algorithm, and the like.

[0029] However, with such a configuration, on the one hand, due to the assembly tolerance between the multiple lenses, multiple alignments are required when synthesizing through the super-resolution algorithm, which affects the algorithm performance, thereby reducing the imaging effect of the camera module 5. On the other hand, the lenses of the multiple smaller lenses are usually traditional lenses, which are large in size and weight, and are not conducive to achieving a lighter and thinner design.

[0030] In order to solve the above technical problems, the present disclosure provides a lens, in which structural unit arrays are respectively formed in multiple first partitions of a substrate, each structural unit array includes multiple nano-column structures arranged in an array corresponding to the first partition, and each structural unit array constitutes a super lens. In this way, each super lens can be made simultaneously on the same substrate using high-precision manufacturing processes such as etching, imprinting, and photolithography, without the need for subsequent assembly processes, so that there is no assembly tolerance between super lenses, avoiding the impact of assembly tolerance on algorithm performance, thereby effectively improving the imaging effect of the camera module. At the same time, since the thickness of the super lens is only in the micron level, the height of the camera module can be further reduced, which is conducive to achieving a lighter and thinner design.

[0031] like Figure 3 As shown, an exemplary embodiment of the present disclosure provides a lens 1, which can be applied to a lens module to adjust the incident light through the lens before the incident light enters the photosensitive element. The lens 1 includes a substrate 11 and N structural unit arrays 112 arranged on the substrate 11, and the substrate 11 is divided into N first partitions 111, wherein N is a positive integer greater than 1, and the specific value of N is not limited, and can be set according to specific needs, for example, it can be 2, 3, 4, 5, 6, etc. The specific shape of the first partition 111 is also not limited, for example, it can be a rectangle, a hexagon, etc., for example, as Figure 3 As shown, four first partitions 111 having a rectangular shape are divided on the same side of the substrate 11 .

[0032] N structural unit arrays 112 are arranged in one-to-one correspondence with N first partitions 111, each structural unit array 112 includes a plurality of nano-column structures, each structural unit array 112 is arranged on the first partition 111 corresponding thereto, and each structural unit array 112 constitutes a super lens. Exemplarily, a nano-column structure array can be formed on each first partition 111 by a high-precision manufacturing process such as etching, imprinting, and photolithography. Exemplarily, imprinting can be, for example, nano-imprinting technology, and photolithography can be, for example, femtosecond laser direct writing lithography. Each super lens uses a nano-column structure to focus, diffract, adjust light wave characteristics, and process visible light of a specific band.

[0033] In this embodiment, each metalens is simultaneously manufactured in a plurality of first partitions of a substrate 11, and no subsequent assembly process is required, so that there is no assembly tolerance between the metalens, and the algorithm performance is avoided from being affected by the assembly tolerance, thereby effectively improving the imaging effect of the camera module 5. At the same time, since the thickness of the metalens is only in the micron order, the height of the camera module 5 can be further reduced, which is conducive to achieving a lighter and thinner design. In addition, due to technical problems, it is not possible to manufacture metalens of larger sizes, which limits the size of the camera module. In this embodiment, by simultaneously manufacturing multiple metalens on a substrate 11, multiple metalens constitute a larger lens 1, which can effectively increase the image plane size of the camera module 5. It can be understood that the image plane size refers to the size of the effective imaging area of ​​the camera module 5.

[0034] In one embodiment, among the N structural unit arrays 112, at least two structural unit arrays 112 have different arrangements of nano-column structures. For example, the arrangements of the nano-column structures of each structural unit array 112 may be different, or only two structural unit arrays 112 may have different arrangements of the nano-column structures, while the arrangements of the nano-column structures of the other structural unit arrays 112 are the same, and there is no specific limitation on this. The arrangement of the nano-column structures may include, for example, a first structural unit array, a second structural unit array, and a third structural unit array. The first structural unit array includes multiple circles of nano-column structures arranged radially from the outside to the inside, each circle includes multiple nano-column structures arranged circumferentially, and the spacing between adjacent nano-column structures in each circle of nano-column structures may be the same or different. The multiple nano-column structures of the second structural unit array form multiple rows of nano-column structures, and the nano-column structures of two adjacent rows correspond to each other. The multiple nano-column structures of the third structural unit array form multiple rows of nano-column structures, and the nano-column structures of two adjacent rows are staggered.

[0035] Different arrangements of nanocolumn structures have different responses to incident light of different wavelengths. For example, the periodic structure of the nanocolumn structure can form a bandgap structure to diffract or reflect light in a specific wavelength range, thereby affecting the transmission or focusing performance of the superlens. Exemplarily, by setting the arrangement of the nanocolumn structure of the first structural unit array, the first structural unit array only processes light of the first wavelength band. By setting the arrangement of the nanocolumn structure of the second structural unit array, the second structural unit array only processes light of the second wavelength band. By setting the arrangement of the nanocolumn structure of the third structural unit array, the third structural unit array only processes light of the third wavelength band. It can be understood that a periodic structure refers to a structure that repeats according to a certain rule; a bandgap structure refers to an energy interval in which the energy state density is zero in the band structure.

[0036] In this embodiment, by making the arrangements of the nanocolumn structures of at least two structural unit arrays 112 different, it is possible to process incident light in the entire visible light range. Since the structural unit arrays 112 with nanocolumn structures in different arrangements can process visible light of different bands at the same time, it not only ensures that visible light of different bands can reach the same position at the same time, thereby achieving focusing and eliminating chromatic aberration, thereby improving the imaging effect of the camera module 5, but also can expand the coverage of the lens 1 for the visible light band.

[0037] In another embodiment, among the N structural unit arrays 112, at least two structural unit arrays 112 have nanocolumn structures of different sizes. For example, the sizes of the nanocolumn structures of the structural unit arrays 112 may be different, or the sizes of the nanocolumn structures of only two structural unit arrays 112 may be different, while the sizes of the nanocolumn structures of the other structural unit arrays 112 may be the same. The size may be a diameter size or a height size. For example, the first structural unit array and the second structural unit array have the same size, but they are different from the size of the third structural unit array. Alternatively, the second structural unit array and the third structural unit array have the same size, but they are different from the size of the first structural unit array.

[0038] Nanocolumn structures of different sizes will also have different responses to incident light of different wavelengths. For example, when the size of the nanocolumn structure is equal to the wavelength of the incident light, or the size of the nanocolumn structure is smaller than the wavelength of the incident light, a surface plasmon resonance effect will occur, thereby enhancing or suppressing light of a specific wavelength range. In addition, the size of the nanocolumn structure will also affect the refractive index and transmittance of the superlens, thereby affecting its focusing performance for visible light of different wavelengths.

[0039] For example, the size of the nanorod structure of the first structural unit array can be set so that the first structural unit array only processes the light of the first wavelength band. The size of the nanorod structure of the second structural unit array can be set so that the second structural unit array only processes the light of the second wavelength band. The size of the nanorod structure of the third structural unit array can be set so that the third structural unit array only processes the light of the third wavelength band.

[0040] In this embodiment, by making the nano-column structures of at least two structural unit arrays 112 have different sizes, it is also possible to process incident light in the entire visible light range. Since the structural unit arrays 112 with nano-column structures of different sizes can process visible light of different wavelengths at the same time, it is ensured that visible light of different wavelengths can reach the same position at the same time, thereby achieving focusing and eliminating chromatic aberration.

[0041] In another embodiment, among the N structural unit arrays 112, at least two structural unit arrays 112 have different arrangements and sizes of nano-pillar structures. For example, the arrangements and sizes of the nano-pillar structures of each structural unit array 112 may be different, or the arrangements and sizes of the nano-pillar structures of only two structural unit arrays 112 may be different, while the arrangements and sizes of the nano-pillar structures of other structural unit arrays 112 are the same.

[0042] In this embodiment, by making the arrangement and size of the nano-column structures of at least two structural unit arrays 112 different, the processing effect of visible light in different wavelength bands is further improved.

[0043] In one embodiment, if Figure 3 As shown, the working bands of the various super lenses are the same, which facilitates the manufacture of the various super lenses and improves the processing efficiency of the lens 1.

[0044] In another embodiment, if Figure 3 As shown, at least two metalenses have different working bands. For example, the working bands of all metalenses may be different, or only two metalenses may have different working bands, while the working bands of other metalenses are the same. With such a design, each metalenses can process the visible light corresponding to its working band, further expanding the band range of visible light that can be processed, thereby expanding the coverage of the visible light band of the lens 1.

[0045] In one embodiment, continue to refer to Figure 3 The union of the working bands of each super lens covers the visible light band. Such a design effectively prevents the light in the visible light band from penetrating through the gaps between adjacent super lenses, thereby effectively ensuring that the lens 1 can fully cover the visible light band.

[0046] In one embodiment, continue to refer to Figure 3 , the N metalenses formed by the N structural unit arrays 112 include lenses of the first type to lenses of the nth type, where n is a positive integer less than or equal to N, and lenses of different types have different operating bands. For example, the type of each metalenses may be different, or at least two lenses of the N metalenses may be of different types, while the types of the other lenses are the same, and no specific limitation is made here.

[0047] When N=2, n=2, that is, there are two metalenses, and the two metalenses are lenses of different types. The maximum value of the working band of the first type lens is greater than the minimum value of the working band of the second type lens and less than the maximum value of the working band of the second type lens. Exemplarily, the working band of the first type lens is 390nm to 500nm, and the working band of the second type lens is 492nm to 760nm, so that the working band of the first type lens and the working band of the second type lens have an intersection.

[0048] When N is greater than 2, the minimum and maximum values ​​of the working bands of the first type of lens to the nth type of lens gradually increase, and the working bands of adjacent types of lenses overlap.

[0049] In this embodiment, by making the working bands of adjacent types of lenses exist as a union, it can further ensure that the lens 1 can cover the comprehensiveness of the visible light band, and expand the coverage of the visible light band of the lens 1. At the same time, different types of lenses have different responses to visible light of different bands, so that different types of lenses can process visible light of different bands at the same time, ensuring that visible light of different bands can reach the same position at the same time, thereby achieving focusing and eliminating chromatic aberration, and improving the imaging effect of the camera module 5.

[0050] Continue to refer Figure 3 In one embodiment, N=4, the shapes of the four first partitions 111 are all rectangular, and the four first partitions 111 are spliced ​​together to form a rectangle, and the four first partitions 111 respectively constitute the four corner areas of the rectangle. Such a setting can improve the connection tightness of the first partitions 111 when spliced, which is conducive to the miniaturization design of the lens 1.

[0051] like Figure 4 As shown, the working bands of the two metalenses formed by the structural unit arrays 112 in the two first partitions 111 at one diagonal are the same, and the working bands of the two metalenses formed by the structural unit arrays 112 in the two first partitions 111 at the other diagonal are different. In this design, two metalenses with the same working band are set to process visible light that is more sensitive to the human eye, thereby improving the imaging effect. The two metalenses with the same working band are distributed at one diagonal, and the other two metalenses with different working bands are distributed at the other diagonal of the rectangle, so that the transmission area of ​​visible light that is more sensitive to the human eye is more uniform, thereby further improving the imaging effect.

[0052] like Figure 4As shown, in one embodiment, since the human eye is most sensitive to visible light in the green light band, based on this, the working bands of the two superlenses with the same working band are both green light bands, and among the two superlenses with different working bands, the working band of one superlens is the red light band, and the working band of the other superlens is the blue light band. Such a design expands the area of ​​the green light band processing, thereby improving the effect of the human eye seeing the image.

[0053] like Figure 4 As shown, an exemplary embodiment of the present disclosure provides a camera module 5, which includes a photosensitive element 3 and at least one lens 1 as described above. The photosensitive element 3 can be, for example, an image sensor. The lens 1 is arranged on the photosensitive side of the photosensitive element 3, and the visible light is focused to the photosensitive element 3 through the lens 1, and the photosensitive element 3 processes the visible light. Exemplarily, the photosensitive element 3 synthesizes the light focused by each super lens on the lens 1 to form a complete image. Multiple super lenses are made on a substrate 11 at the same time, and no subsequent assembly process is required, so that there is no assembly tolerance between the super lenses, avoiding the impact of the algorithm performance due to the assembly tolerance, so that the imaging effect of the camera module 5 can be effectively improved. At the same time, since the thickness of the super lens is only in the micron level, the height of the camera module 5 can be further reduced, which is conducive to achieving a lighter and thinner design. It can be understood that the photosensitive side of the photosensitive element 3 refers to the side of the photosensitive element 3 for receiving light.

[0054] When the camera module 5 is provided with a plurality of lenses 1 as described above, the plurality of lenses 1 are sequentially arranged at intervals on the photosensitive side of the photosensitive element 3 , and visible light is sequentially focused by each lens 1 and then processed by the photosensitive element 3 .

[0055] Continue to refer Figure 4 In one embodiment, the camera module 5 further includes a filter 2, and the filter 2 is arranged between the photosensitive element 3 and the lens 1, that is, the filter 2 is arranged between the photosensitive element 3 and each super lens on the lens 1.

[0056] At present, the optical filter in the related art includes two layers of filters, one layer of filter is arranged on the outside of the lens or lens group, and is used to filter out light in other bands except visible light, and the other layer of green light is arranged on the photosensitive element, for example, it can be a color filter array (CFA), and the production cost is relatively high. In this embodiment, since the light in the visible light band can be processed by each super lens, only one layer of filter 1 is required, which is convenient for production and assembly, and effectively reduces the production cost.

[0057] The filter 2 is provided with second partitions 21 corresponding to the first partitions 111 one by one, and the band range of each second partition 21 corresponds to the working band of the corresponding super lens. Such a design can ensure the transmittance of visible light in each band, and avoid the visible light in the band range being filtered out by the filter 2 due to the mismatch between the band range of the second partition 21 and the working band of the corresponding super lens, thereby effectively improving the imaging effect of the camera module 5.

[0058] Continue to refer Figure 4 In one embodiment, the filter 2 is rectangular and divided into four second partitions 21, and the four second partitions 21 are respectively located at the four corners of the rectangle. With such a setting form, the connection tightness of each second partition 21 when spliced ​​can be improved, and the visible light transmitted from the metal lens is prevented from being transmitted from the gap between the second partitions 21 to the photosensitive element 3, thereby improving the naturalness and accuracy of the image color. The band ranges of the two second partitions 21 at one diagonal are both green light bands, and the band ranges of the two second partitions 21 at the other diagonal are red light bands and blue light bands, respectively. With such a design, the band range of each second partition 21 corresponds to the band range of its corresponding metalens, which increases the processing of visible light in the green light band, thereby improving the effect of the human eye seeing the image.

[0059] An exemplary embodiment of the present disclosure provides an electronic device. By way of example, the electronic device may be a mobile device such as a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA). It may also be a non-mobile device such as a personal computer (PC), a television (TV), a teller machine, or a self-service machine.

[0060] The electronic device includes the camera module 5 as described above, the camera module 5 includes a photosensitive element 3 and at least one lens 1 as described above, each lens 1 includes a substrate 11 and N first partitions are divided on the substrate 11 of the lens 1, a structural unit array is arranged on each first partition, each structural unit array includes a plurality of nanocolumn structures arrayed in the corresponding first partition, and each structural unit array constitutes a super lens 12.

[0061] The electronic device also includes a control module, which is connected to the camera module 5. The control module is configured to synthesize the images of each super lens. Exemplarily, the control module synthesizes the images of each super lens through a super-resolution algorithm. The super-resolution algorithm can be, for example, a deep learning algorithm, an image fusion algorithm, etc. In each lens 1, a plurality of structural unit arrays 112 are respectively formed in a plurality of first partitions 111 of a substrate 11, and each structural unit array 112 constitutes a super lens. In this way, each super lens can be simultaneously manufactured on the same substrate 11 using high-precision manufacturing processes such as etching, imprinting, and photolithography, without the need for subsequent assembly processes, so that there is no assembly tolerance between super lenses, avoiding the impact of assembly tolerance on algorithm performance, thereby effectively improving the imaging effect of the camera module 5. At the same time, since the thickness of the super lens is only in the micron level, the height of the camera module 5 can be further reduced, which is conducive to the electronic device to achieve a lighter and thinner design.

[0062] In one embodiment, the control module is further configured to determine the object distance of the photographed object based on the imaging of at least two of the N super lenses. Exemplarily, the same photographed object is photographed simultaneously by two super lenses to form two viewing angles, and the distance between the two viewing angles is the baseline length. For example, feature point detection algorithms are used to extract feature points in the images under the two viewing angles, and feature description algorithms are used to compare and match the feature points in the two images. The difference in viewing angle between the two super lenses is obtained by calculating the parallax between the matching feature points. The object distance of the photographed object is determined based on the parallax and the baseline length using the principle of triangulation.

[0063] This design enables electronic devices to have features such as three-dimensional perception, distance measurement, and depth perception, thereby effectively improving the user experience.

[0064] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0065] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A lens, characterized in that: The lens comprises: A substrate, wherein the substrate is divided into N first partitions; N structural unit arrays are arranged in one-to-one correspondence with the N first partitions, each of the structural unit arrays includes a plurality of nanocolumn structures arranged in an array in the corresponding first partition, and each of the structural unit arrays constitutes a superlens, wherein N is a positive integer greater than 1.

2. The lens according to claim 1, characterized in that Among the N structural unit arrays, at least two of the structural unit arrays have different arrangements of nano-column structures and / or different sizes of nano-column structures.

3. The lens according to claim 1, characterized in that: At least two of the metalenses have different operating wavelength bands.

4. The lens according to claim 3, characterized in that: The union of the working bands of the metalenses covers the visible light band.

5. The lens according to claim 3, characterized in that: The N metalenses formed by the N structural unit arrays include the first type lens to the nth type lens, where n is a positive integer less than or equal to N, and the working bands of different types of lenses are different; N=2, n=2, the maximum value of the working band of the first type lens is greater than the minimum value of the working band of the second type lens and less than the maximum value of the working band of the second type lens; When N is greater than 2, the minimum and maximum values ​​of the working bands of the first type of lens to the nth type of lens gradually increase, and the working bands of adjacent types of lenses overlap.

6. The lens according to any one of claims 1 to 5, characterized in that: N=4, the shapes of the four first partitions are all rectangular, and the four first partitions are spliced ​​together to form a rectangle, and the four first partitions respectively constitute the four corner areas of the rectangle, and the working bands of the two super lenses formed by the structural unit arrays in the two first partitions at one diagonal angle are the same, and the working bands of the two super lenses formed by the structural unit arrays in the two first partitions at the other diagonal angle are different.

7. The lens according to claim 6, characterized in that: The working bands of the two super lenses with the same working band are both green light bands; Among the two super lenses with different working bands, the working band of one of the super lenses is the red light band, and the working band of the other super lens is the blue light band.

8. A camera module, characterized in that: The camera module includes a photosensitive element and at least one lens as described in any one of claims 1 to 7, and the lens is arranged on the photosensitive side of the photosensitive element.

9. The camera module according to claim 8, characterized in that: The camera module further includes a filter, which is arranged between the photosensitive element and the super lens; The filter is provided with second partitions corresponding to the first partitions one by one, and the band range of each second partition corresponds to the working band of the corresponding super lens.

10. The camera module according to claim 9, characterized in that: The filter is rectangular and divided into four second partitions, which are respectively located at the four corners of the rectangle. The band ranges of two second partitions at one diagonal corner are both green light bands, and the band ranges of two second partitions at the other diagonal corner are red light bands and blue light bands, respectively.

11. An electronic device, characterized in that: The electronic device comprises a camera module as described in any one of claims 8 to 10, and the control module is connected to the camera module, and the control module is configured to synthesize the images of each of the super lenses.

12. The electronic device according to claim 11, characterized in that: The control module is also configured to determine the object distance of the photographed object based on the imaging of at least two of the N super lenses.

Images