Superlens phase design method for correcting asymmetric chromatic aberration of multi-aperture system field and multi-aperture system based on superlens

Abstract

The invention belongs to the related technical field of optical instruments, and discloses a superlens phase design method for correcting asymmetric chromatic aberration of a multi-aperture system field and a multi-aperture system based on a superlens. The super-lens phase design method comprises the following steps: calculating expansion coefficients # imgabs3 # and # imgabs4 # in a super-lens diffraction phase expansion expression according to relational expressions # imgabs0 # and # imgabs1 # # imgabs2 # to obtain a diffraction phase of a super-lens; in the formula, lambda is the wavelength, W020, W111, # imgabs 5 # and # imgabs 6 # are parameters of the original multi-aperture system without the super lens, and # imgabs 7 #, # imgabs 8 # and # imgabs 9 # are parameters of the super lens; and performing dispersion phase compensation on the diffraction phase of the super lens to obtain a final phase of the super lens. According to the method, the correction of the field asymmetric chromatic aberration of the multi-aperture system is realized based on the super lens, the super lens is used, the assembly is simple, the system structure is simple and compact, the processing precision of the super lens is high, and the effective correction of the field asymmetric chromatic aberration in the multi-aperture system can be realized by designing the phase of the super lens.

Description

Technical Field

[0001] The present invention belongs to the technical field related to optical instruments, and more specifically, relates to a superlens phase design method for correcting field asymmetric chromatic aberration of a multi-aperture system and a multi-aperture system based on the superlens. Background Art

[0002] In the current data-driven era, there is a growing demand for obtaining multi-dimensional information beyond the perception of the human eye. Multi-aperture optical systems obtain information of different dimensions through multiple optical channels consisting of sub-lenses of different apertures, showing great potential in both commercial applications and academic research. However, the asymmetric characteristics of multi-aperture systems introduce field asymmetric monochromatic aberrations and lateral chromatic aberrations, which severely limit the development of large-aperture, long-focal-length multi-aperture systems.

[0003] There are several methods for chromatic aberration correction. Although a reflective system combined with a free-form surface can effectively correct aberrations without considering chromatic aberrations, the system is large and complex to assemble, making it unsuitable for applications that require miniaturization and simplification. A refractive system is used to combine lenses of different shapes and materials. Although this method effectively corrects chromatic aberrations and monochromatic aberrations, it often results in a complex and bulky optical system structure, which limits its practical application in optical systems. Using diffractive optical elements (DOEs), although this method provides a more compact solution, adding diffractive optical elements to a multi-aperture system will result in low processing accuracy and poor efficiency, and the chromatic aberration correction effect on the multi-aperture system is not ideal. As a sub-wavelength structure array, metalens has demonstrated excellent capabilities in manipulating light fields. Compared with traditional DOEs, metalens have higher accuracy and efficiency, but it is difficult to solve the field asymmetric chromatic aberration problem introduced by the asymmetric characteristics of multi-aperture systems.

[0004] Based on this, the present invention proposes a method for correcting asymmetric chromatic aberration of a multi-aperture system, which realizes effective correction of field asymmetric chromatic aberration in a multi-aperture system in a simple manner. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a superlens phase design method for correcting the field asymmetric chromatic aberration of a multi-aperture system and a multi-aperture system based on a superlens, the purpose of which is to achieve effective correction of the field asymmetric chromatic aberration in the multi-aperture system in a simple way.

[0006] To achieve the above object, the present invention provides a method for designing a phase of a superlens for correcting field asymmetric chromatic aberration of a multi-aperture system, which comprises:

[0007] According to the relation and Calculate the expansion coefficients in the phase unwrapping expression of the metalens diffraction and The diffraction phase of the superlens is obtained; where λ is the wavelength, W 020 , W 111 , and are the parameters of the original multi-aperture system without the metalens installed, W 020 and W 111 are the wave aberration of defocus and wavefront tilt in the system, and They represent the diaphragm eccentricity, diaphragm displacement, image height vector and normalized pupil vector in the system respectively. and are the parameters of the superlens, and The metalens are respectively used to correct the wavefront aberration of defocus and wavefront tilt required. and The aperture eccentricity and aperture shift provided by the metalens, for The partial derivative with respect to wavelength λ is The partial derivative with respect to wavelength λ;

[0008] The diffraction phase of the metalens is dispersed and phase compensated to obtain the final phase of the metalens to achieve asymmetric chromatic aberration correction of the multi-aperture system field.

[0009] Optionally, the metalens diffraction phase unwrapping expression is:

[0010]

[0011]

[0012] In the formula, is the diffraction phase of the superlens, j>2 is the order of expansion, is the j-order expansion term, ξ j (λ) is the coefficient of the j-order expansion term, Represents the j-order diffraction phase unwrapping expression.

[0013] Optionally, the calculation formula for performing dispersion phase compensation on the diffraction phase of the metalens is:

[0014]

[0015] In the formula, is the diffraction phase of the superlens, Δφ meta (λ) is the phase dispersion transmitted by the columnar microstructure in the superlens at wavelength λ, is the final phase of the metalens at wavelength λ.

[0016] Optionally, a metalens is installed corresponding to each aperture channel, and the phase distribution of the metalens under any aperture channel is calculated first, and then the phase distribution of the metalens of other aperture channels is determined by the planar symmetry of the multi-aperture system.

[0017] Optionally, the parameter It is determined by constructing a relationship between the field asymmetric chromatic aberration of the original multi-aperture system and the influence of the diaphragm eccentricity and displacement and performing fitting.

[0018] Optionally, the field asymmetric chromatic aberration of the multi-aperture system is affected by the eccentricity and displacement of the aperture:

[0019]

[0020] In the formula, is the wavefront aberration coefficient of the original multi-aperture system The partial derivative with respect to wavelength λ, pistons is the aberration coefficient independent of pupil coordinates.

[0021] The present invention also provides a multi-aperture system based on a superlens, wherein the multi-aperture system is equipped with a superlens for realizing field asymmetric chromatic aberration correction, and the phase of the superlens satisfies the phase designed by the method described in any of the above items.

[0022] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, wherein the processor implements the steps of any of the above methods when executing the computer program.

[0023] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of any of the above methods when executed by a processor.

[0024] The present invention also provides a computer program product, comprising a computer program or instructions, wherein when the computer program or instructions are executed by a processor, the steps of any of the above methods are implemented.

[0025] In general, compared with the prior art, the above technical solutions conceived by the present invention mainly have the following beneficial effects:

[0026] ① The present invention realizes efficient correction of field asymmetric chromatic aberration of multi-aperture systems, so that the imaging quality of the system is significantly improved. The present invention analyzes the influence of aperture eccentricity and displacement on field asymmetric chromatic aberration of multi-aperture systems, and constructs a relationship between the defocus dispersion term parameters and lateral dispersion term parameters required by the metalens for chromatic aberration correction of the multi-aperture system and the multi-aperture system parameters. Based on this relationship, the defocus dispersion term parameters and lateral dispersion term parameters required by the metalens can be accurately calculated, thereby realizing the precise design of the metalens phase, and finally achieving effective correction of field asymmetric chromatic aberration.

[0027] ② The present invention significantly simplifies the structural design of the multi-aperture system, while ensuring the high-precision assembly of the system. This is mainly reflected in two aspects: on the one hand, compared with the traditional reflective system with free-form surfaces, the present invention uses a super lens for chromatic aberration correction, maintains a coaxial assembly scheme, and avoids the assembly difficulty and system complexity caused by multiple reflective surfaces; on the other hand, compared with the traditional refractive system that needs to combine lenses of various shapes and materials to correct chromatic aberration, the present invention only needs to add a super lens to the original system to achieve chromatic aberration correction, which not only ensures the correction effect, but also makes the system structure simpler and more compact. This structural simplification stems from the unique phase regulation capability of the super lens. Through a carefully designed phase distribution, the same correction effect as the traditional optical system can be achieved.

[0028] Furthermore, by constructing a theoretical model of the field asymmetric chromatic aberration of a multi-aperture system affected by the diaphragm eccentricity and displacement, the parameters can be accurately obtained.

[0029] Furthermore, by determining the phase distribution of the metalens of other aperture channels through the planar symmetry of the multi-aperture system, the design efficiency of the phase distribution of the metalens of other aperture channels can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram showing how axial movement and lateral decentering of the aperture in a multi-aperture system can lead to lateral chromatic aberration;

[0031] Figure 2 is a flowchart of the steps of a method for designing a metalens phase for correcting field asymmetric chromatic aberration of a multi-aperture system in one embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the theoretical model of asymmetric chromatic aberration of multi-aperture system;

[0033] Figure 4 Schematic diagram of the structure of a multi-aperture quantum dot camera in one embodiment of the present invention, wherein (a) is a schematic diagram of the three-dimensional structure of the multi-aperture quantum dot camera, and (b) is a front view of the multi-aperture quantum dot camera;

[0034] Figure 5(a) is the MTF curve for camera channel 2;

[0035] FIG5( b ) is a point diagram for camera channel 2. FIG5( b ) is a point diagram for camera channel 2. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] like Figure 1 As shown in Figure 1, in a multi-aperture system, axial movement and lateral decentering of the aperture can lead to lateral chromatic aberration. Figure 1 The first figure in the figure shows that when the aperture is located at the center of the thin lens, the main light rays of different wavelengths pass through the center of the lens without deflection, so no lateral chromatic aberration occurs; Figure 1 The second figure shows that when the aperture moves along the optical axis, the main light rays of different wavelengths enter the lens at different angles and positions, pass through the center of the aperture after refraction, and converge at different heights in the image plane, resulting in lateral chromatic aberration; Figure 1 The third graph in Figure 3 shows that this chromatic aberration becomes more pronounced as the aperture is further decentered.

[0038] In order to achieve effective correction of field asymmetric chromatic aberration in a multi-aperture system in a simple manner, the present invention proposes the following solution.

[0039] Example 1

[0040] The present invention realizes the correction of field asymmetric chromatic aberration of a multi-aperture system based on a super lens. The super lens is easy to assemble, the system structure is simple and compact, and the processing precision of the super lens is high. The present invention designs the phase of the super lens so that it can also realize the effective correction of field asymmetric chromatic aberration of a multi-aperture system. Figure 2 The figure is a flow chart of the steps of a method for designing a metalens phase for correcting field asymmetric chromatic aberration of a multi-aperture system in one embodiment of the present invention, and the steps are described in detail below.

[0041] Step S1: According to the relationship and Calculate the expansion coefficients in the phase unwrapping expression of the metalens diffraction and Get the diffraction phase of the superlens.

[0042] Specifically, by unfolding the metalens diffraction phase, the metalens diffraction phase unfolding expression can be obtained as shown below:

[0043]

[0044] represents the image height vector, represents the normalized pupil vector, and these two parameters are the system parameters of the multi-aperture system;

[0045] Φ diff is the diffraction phase of the metalens to be used for chromatic aberration correction of the multi-aperture system;

[0046] The wave aberration required to provide the defocus of the metalens, for The partial derivative with respect to wavelength λ reflects the defocus dispersion parameter that the superlens needs to provide; The wavefront aberration required to provide the wavefront tilt of the metalens is for The partial derivative with respect to wavelength λ reflects the lateral dispersion parameter that the superlens needs to provide; The diffraction stop shift amount provided for the metalens depends on the installation position of the metalens. The installation position of the metalens can determine the diffraction stop shift amount provided; is the second-order expansion in the expansion expression, is the first-order expansion in the expansion expression, where the parameter These are all parameters to be sought;

[0047] is a high-order expansion, j>2 indicates the expansion order, ξ j (ω) is the coefficient of the j-order expansion term, ω is the frequency of the light wave, represents the j-order phase unwrapping expression. In the specific operation, the high-order unwrapping Or determine its value through fitting.

[0048] Based on the above metalens diffraction phase unwrapping expression, it is necessary to determine and Take the value and then calculate the diffraction phase Φ of the superlens diff , the final phase of the superlens is determined by phase compensation, so that the superlens can achieve asymmetric chromatic aberration correction of multi-aperture systems.

[0049] Therefore, the key to this technical solution lies in how to calculate the defocus dispersion term parameters required by the super lens. And the lateral dispersion parameters required by the super lens By designing the phase of the superlens, it can have the function of correcting the asymmetric chromatic aberration of the multi-aperture system.

[0050] By analyzing the chromatic aberration of the superlens diffraction and the inherent chromatic aberration of refraction in the optical system The two have opposite signs and equal magnitudes, and thus the following specific calculation relationship is deduced:

[0051]

[0052] Where W 020 , W 111 , and are the parameters of the original multi-aperture system without the metalens installed, W 020 and W 111 are the wave aberration of defocus and wavefront tilt in the system, and They represent the diaphragm eccentricity, diaphragm displacement, image height vector and normalized pupil vector in the system, respectively. is the chief ray height, and y is the marginal ray height.

[0053] Through this relationship, the defocus dispersion parameters required by the metalens can be quickly calculated. And the lateral dispersion parameters required by the super lens Substituting the metalens diffraction phase unwrapping expression into the expression, the diffraction phase of the metalens is obtained. Experiments have shown that the metalens designed by this method can effectively correct the field asymmetric chromatic aberration in the multi-aperture system.

[0054] In a specific embodiment, in order to obtain the defocused wave aberration W in the original multi-aperture system 020 and wavefront tilt wave aberration W 111 By constructing a theoretical model of the field asymmetric chromatic aberration of a multi-aperture system affected by the eccentricity and displacement of the aperture, the node characteristics of the chromatic aberration can be determined, and the wave aberration W of the defocus in the multi-aperture system can be determined by fitting. 020 and wavefront tilt wave aberration W 111 .

[0055] Specifically, the theoretical model is as follows:

[0056]

[0057] In the formula, is the wavefront aberration coefficient of the original multi-aperture system The partial derivative of the wavelength λ, pistons, is an aberration coefficient that is independent of the pupil coordinates and can usually be ignored in aberration analysis.

[0058] like Figure 3The figure shows a schematic diagram of the theoretical model of asymmetric chromatic aberration of a multi-aperture system, where (a) is a schematic diagram of the distribution of lateral chromatic aberration of the system in the full field of view when the aperture is eccentric, and (b) is a wavelength-dependent beam footprint caused by aperture offset and eccentricity, where the dotted circle represents the effect of aperture offset, the solid circle represents the effect of eccentricity, and different grayscales represent different wavelengths. This model can be used to quantitatively analyze the relationship between the aperture position and lateral chromatic aberration.

[0059] Step S2: Perform dispersion phase compensation on the diffraction phase of the metalens to obtain the final phase of the metalens to achieve asymmetric chromatic aberration correction of the multi-aperture system field.

[0060] Specifically, after obtaining the diffraction phase of the superlens, the final phase of the superlens is calculated by the dispersion phase compensation algorithm. The specific calculation formula is:

[0061]

[0062] In the formula, is the diffraction phase of the superlens, Δφ meta (λ) is the phase dispersion transmitted by the columnar microstructure in the superlens at wavelength λ, is the final phase of the metalens at wavelength λ.

[0063] Since multi-aperture systems usually have light waves of multiple different wavelengths, the light wave types can cover the visible light band to the long-wave infrared, and the wavelength range can cover 0.39μm to 14μm, which can meet the imaging quality requirements of high-end optical systems. In order to achieve the correction of asymmetric chromatic aberration at different wavelengths, it is necessary to design different phases for the metalens at different wavelengths. In specific operations, the above steps can be performed for each wavelength to determine the phase of the metalens at that wavelength. Since it is found through analysis that the diffraction phase of the metalens calculated at different wavelengths is the same, a wavelength can be selected as the reference wavelength. After the diffraction phase of the metalens is calculated, the other wavelengths are based on the diffraction phase. Perform a dispersion phase compensation algorithm to quickly obtain the phase of the metalens at each wavelength. Specifically, the center wavelength can generally be selected as the reference wavelength.

[0064] Since the multi-aperture system has multiple aperture channels, each aperture channel corresponds to a metalens installed, and the phase of the metalens used in each aperture channel is different, therefore, it is necessary to calculate the phase distribution of the metalens in each aperture channel separately. Specifically, the above method can be repeated for each aperture channel to obtain the phase distribution of the metalens in each aperture channel. In this embodiment, after calculating the phase distribution of the metalens under any aperture channel, the phase distribution of the metalens of other aperture channels is determined by the planar symmetry of the multi-aperture system. The planar symmetry of the system is strategically utilized. By designing the basic phase distribution and performing a mirror transformation, the phase distribution of the metalens of all channels can be efficiently determined.

[0065] Example 2

[0066] The present invention also proposes a multi-aperture system based on a superlens, wherein the multi-aperture system is equipped with a superlens for realizing field asymmetric chromatic aberration correction, and the phase of the superlens satisfies the phase designed in Example 1. The superlens is specifically installed between the spherical array and the detector window.

[0067] Example 3

[0068] The present invention also relates to an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of embodiment 1 when executing the computer program.

[0069] The electronic device may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The memory may be used to store computer programs and / or modules, and the processor may perform various functions of the electronic device by running or executing computer programs and / or modules stored in the memory, and calling data stored in the memory.

[0070] Example 4

[0071] The present invention also relates to a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method proposed in Example 1 are implemented.

[0072] Specifically, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as a hard disk, an internal memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0073] Example 5

[0074] The embodiment of the present invention provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps of the method provided in the above-mentioned embodiment 1 of the present invention.

[0075] The effects of the present invention are verified by specific experiments as follows.

[0076] Based on the quantum dot detector, this experiment designed a multi-aperture quantum dot camera operating in the 2.5um to 4um band. It adopted a hybrid optical system of superlens and traditional refractive lens, and realized the field asymmetric chromatic aberration correction of the multi-aperture system through the superlens.

[0077] Figure 4 Schematic diagram of the structure of a multi-aperture quantum dot camera, wherein (a) is a schematic diagram of the three-dimensional structure of the multi-aperture quantum dot camera, and (b) is a front view of the multi-aperture quantum dot camera. The camera includes several parallel optical channels, each of which includes an even-order aspheric mirror, a refractive lens, a super lens and a quantum dot detector, specifically including aspheric surface 1, aspheric surface 2, aspheric surface 3, aspheric surface 4, aspheric surface 5, aspheric surface 6, spherical array 7, spherical array 8, super lens 9, super lens 10, detector window 11, cold aperture 12 and image plane 13.

[0078] The camera uses three aspherical refractive lenses, one spherical array lens and a nine-channel super lens array design. The specific performance parameters of the camera are shown in Table 1, the structural parameters of the camera are shown in Table 2, the parameters of the aspherical lens in the multi-aperture camera are shown in Table 3, the parameters of the spherical array in the multi-aperture camera and the eccentricity are shown in Table 4, and the phase coefficient table of the super lens in the multi-aperture camera and the eccentricity are shown in Table 5. Tables 4 and 5 only provide parameters of three channels, and the parameters of other channels can be determined by plane symmetry.

[0079] Table 1: Performance parameters of multi-aperture cameras

[0080]

[0081] Table 2: Structural parameters of multi-aperture cameras

[0082]

[0083]

[0084] Table 3: Parameters of aspherical lenses in multi-aperture cameras

[0085] Cone coefficient 4th order coefficient 6th order coefficient 8th order coefficient Aspheric 1 -8.352 1.238E-005 -3.328E-009 -5.507E-012 Aspheric 2 5.641 2.306E-005 -2.187E-008 5.086E-012 Aspheric 3 -6.087 9.965E-005 -1.327E-007 1.097E-010 Aspheric 4 -1.238 -1.1503E-005 7.876E-007 -2.989E-009 Aspheric 5 -3.246 -7.913E-005 1.226E-006 -3.906E-009 Aspheric 6 -9.491 -4.696E-005 1.237E-006 -4.234E-009

[0086] Table 4: Spherical array parameters and eccentricity in multi-aperture cameras

[0087]

[0088] Table 5: Phase coefficients and eccentricity of the super lens in the multi-aperture camera

[0089]

[0090] Figure 5(a) , 5(b) The MTF curve and point diagram of channel 2 of the camera are respectively, which verify that the system has good imaging quality and effectively solves the problem of asymmetric chromatic aberration in the midfield of the multi-aperture system.

[0091] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. It should be noted that "in one embodiment", "for example", "for example", etc. of the present invention are intended to illustrate the present invention, rather than to limit the present invention.

[0092] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for designing a phase of a metalens for correcting asymmetric chromatic aberration of a multi-aperture system, characterized in that: include: According to the relation and Calculate the expansion coefficients in the phase unwrapping expression of the metalens diffraction and The diffraction phase of the superlens is obtained; where λ is the wavelength, W 020 , W 111 , and are the parameters of the original multi-aperture system without the metalens installed, W 020 and W 111 are the wave aberration of defocus and wavefront tilt in the system, and They represent the diaphragm eccentricity, diaphragm displacement, image height vector and normalized pupil vector in the system respectively. and are the parameters of the superlens, and The metalens are respectively used to correct the wavefront aberration of defocus and wavefront tilt required. and The aperture eccentricity and aperture shift provided by the metalens, for The partial derivative with respect to wavelength λ is The partial derivative with respect to wavelength λ; The diffraction phase of the metalens is dispersed and phase compensated to obtain the final phase of the metalens to achieve asymmetric chromatic aberration correction of the multi-aperture system field.

2. The method for designing a metalens phase for correcting asymmetric chromatic aberration of a multi-aperture system according to claim 1, characterized in that: The metalens diffraction phase unwrapping expression is: In the formula, is the diffraction phase of the superlens, j>2 is the order of expansion, is the j-order expansion term, ξ j (λ) is the coefficient of the j-order expansion term, Represents the j-order diffraction phase unwrapping expression.

3. The method for designing a metalens phase for correcting asymmetric chromatic aberration of a multi-aperture system according to claim 1, characterized in that: The calculation formula for performing dispersion phase compensation on the diffraction phase of the superlens is: In the formula, is the diffraction phase of the superlens, Δφ meta (λ) is the phase dispersion transmitted by the columnar microstructure in the superlens at wavelength λ, is the final phase of the metalens at wavelength λ.

4. The method for designing a metalens phase for correcting asymmetric chromatic aberration of a multi-aperture system according to claim 1, characterized in that: A superlens is installed corresponding to each aperture channel. After the phase distribution of the superlens under any aperture channel is calculated, the phase distribution of the superlens of other aperture channels is determined through the planar symmetry of the multi-aperture system.

5. The method for designing a metalens phase for correcting asymmetric chromatic aberration of a multi-aperture system according to claim 1, characterized in that: parameter It is determined by constructing a relationship between the field asymmetric chromatic aberration of the original multi-aperture system and the influence of the diaphragm eccentricity and displacement and performing fitting.

6. The method for designing a metalens phase for correcting asymmetric chromatic aberration of a multi-aperture system according to claim 5, characterized in that: The relationship between the field asymmetric chromatic aberration of the multi-aperture system and the influence of the diaphragm eccentricity and displacement is: In the formula, is the wavefront aberration coefficient of the original multi-aperture system The partial derivative with respect to wavelength λ, pistons is the aberration coefficient independent of pupil coordinates.

7. A multi-aperture system based on a superlens, characterized in that: The multi-aperture system is equipped with a superlens for realizing field asymmetric chromatic aberration correction, and the phase of the superlens satisfies the phase designed by the method according to any one of claims 1 to 6.

8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product comprising a computer program or instructions, characterized in that When the computer program or instruction is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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