DMS folding and super lens, camera module and terminal equipment

Abstract

The invention discloses a DMS refraction and super lens, a camera module and terminal equipment. The DMS refraction and super lens comprises a first lens, a diaphragm, a second lens, a third lens and an optical filter which are sequentially arranged from an object plane to an image plane along an optical axis; the second lens is a metasurface lens; the first lens and the third lens are resin lenses. According to the invention, by combining the metasurface lens and the traditional refraction lens, the refraction and super hybrid system is constructed, the field angle and the F number are ensured, and the optical total length, the volume and the cost of the lens are reduced, so that the miniaturization and the light weight of the DMS refraction and super lens are realized. In addition, the DMS refraction and super lens can realize high-resolution imaging in a broadband range of 890-990nm.

Description

Technical Field

[0001] This invention relates to the field of visible light photography technology, and in particular to a DMS hyperspectral lens, a camera module, and a terminal device. Background Technology

[0002] The automotive industry is accelerating its transformation towards intelligent and connected vehicles, with cars gradually evolving from traditional transportation tools into mobile intelligent terminals. Among numerous intelligent applications, the Driver Monitoring System (DMS) is a crucial component, working in conjunction with Advanced Driver Assistance Systems (ADAS) to comprehensively enhance driving safety and comfort. For example, when the DMS detects driver distraction, it can activate the ADAS system to adjust the adaptive cruise control speed or trigger lane-keeping assist, thereby reducing the risk of accidents.

[0003] Current driver monitoring systems (DMS) primarily rely on cameras to capture the driver's facial and eye features. These cameras are typically positioned above the steering wheel, on the dashboard, or near the rearview mirror to obtain the optimal imaging angle. By analyzing indicators such as eye opening and closing, blinking frequency, and head posture, the system can identify whether the driver is fatigued or distracted. However, achieving high-quality imaging within the limited space of a vehicle remains a challenge, especially given the trend towards increasingly miniaturized and ultra-thin devices. The size and structure of traditional DMS cameras still have room for optimization.

[0004] Metasurfaces, as a cutting-edge optical technology, allow for the precise manipulation of the phase, amplitude, and polarization of light waves by constructing subwavelength micro- and nanostructures (such as nanoantennas and aperture arrays) in a two-dimensional plane. Their structural dimensions are much smaller than the wavelength of light, enabling the realization of complex optical functions in a compact form, significantly reducing system size and weight, and facilitating integration into miniaturized devices. However, achieving even smaller sizes by combining metasurface lenses with traditional refractive lenses remains a challenge. Summary of the Invention

[0005] The purpose of this invention is to provide a DMS hyperfocal lens, a camera module, and a terminal device, aiming to solve the problem of how to optimize the combination design of metasurface lenses and traditional lenses to achieve a smaller size.

[0006] To solve the above-mentioned technical problems, the objective of this invention is achieved through the following technical solution: providing a DMS hyperspectral lens, comprising a first lens, an aperture stop, a second lens, a third lens, and a filter arranged sequentially along the optical axis from the object plane to the image plane; the second lens is a metasurface lens; the first lens and the third lens are resin lenses; The DMS hyperfocal lens satisfies: ; in, D i The distortion size of the DMS hyperspectral lens. DM The effective area size of the metasurface. n 1 represents the refractive index of the material of the first lens. R 0 Let be the root-mean-square radius of the light spot in the center field of view. th 3 represents the center thickness of the third lens.

[0007] Furthermore, the first lens is an aspherical lens with positive optical power, the object side of the first lens is convex, and the image side of the first lens is concave. The second lens has positive optical power, the object side of the second lens is a plane, and the image side of the second lens is a binary plane; micro-element structures are arranged on the image side of the second lens. The third lens is an aspherical lens with positive optical power, the object side of the third lens is concave, and the image side of the third lens is convex.

[0008] Furthermore, the object-side surface of the first lens has a positive radius of curvature, and the image-side surface of the first lens has a positive radius of curvature; the object-side surface of the third lens has a negative radius of curvature, and the image-side surface of the third lens has a negative radius of curvature.

[0009] Furthermore, the total optical length of the DMS hyperfocal lens TTL With focal length f The relationship between them satisfies: .

[0010] Furthermore, the thickness of the second lens is 0.1-0.7 mm, and the microstructure of the second lens is composed of three types: cylindrical, square, and cross-shaped. The characteristic size of the microstructure ranges from 80 nm to 350 nm, and the microstructure is arranged in a tetragonal lattice.

[0011] Furthermore, the refractive index range of the first lens and the third lens is 1.4-1.7.

[0012] Furthermore, the field of view of the DMS hyperfocal lens satisfies: FOV ≥67°.

[0013] Furthermore, the effective aperture of the DMS hyperfocal lens satisfies: D eff ≤4.4 mm .

[0014] This invention also provides a camera module, including the DMS hyperfocal lens as described above.

[0015] This invention also provides a terminal device, including the camera module described above.

[0016] The beneficial effects of this invention are as follows: while maintaining the field of view and F-number, it reduces the TTL (total optical length), size, and cost of the lens, thereby achieving miniaturization and weight reduction of the DMS hyperrefractive lens. Furthermore, the DMS hyperrefractive lens can achieve high-resolution imaging in a wide wavelength range of 890-990nm. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the DMS hyperfocal lens provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the modulation curve of the DMS hyperfoil provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the diffusion spot of the DMS superconducting lens provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the distortion of the DMS hyperspectral lens provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the modulation curve of the DMS hyperfocal lens provided in Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the blur pattern of the DMS superconducting lens provided in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the distortion of the DMS hyperspectral lens provided in Embodiment 2 of the present invention; Explanation of the markings in the image: 110. First lens; 120. Aperture stop; 130. Second lens; 140. Third lens; 150. Filter; 160. Imaging plane. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0021] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0023] Please see Figure 1 This invention provides a DMS hyperspectral lens, comprising a first lens 110, an aperture 120, a second lens 130, a third lens 140, and a filter 150 arranged sequentially along the optical axis from the object plane to the image plane; the second lens 130 is a metasurface lens; the first lens 110 and the third lens 140 are resin lenses; DMS hyperfocal lens satisfies: ; in, D i The distortion size of the DMS hyperspectral lens. D M The effective area size of the metasurface. n 1 represents the refractive index of the material of the first lens 110. R 0 Let be the root mean square radius of the light spot in the center field of view. th 3 represents the center thickness of the third lens 140.

[0024] In this embodiment, the parameters in the above formula interact with each other, jointly determining the feasible range of the optical system. Within this parameter range (0.5 to 1.5), not only are the field of view and F-number guaranteed, but the TTL (total optical length), size, and cost of the lens are also reduced, thereby achieving miniaturization and weight reduction of the DMS hyperrefractive lens. Furthermore, the DMS hyperrefractive lens can achieve high-resolution imaging in a wide wavelength range of 890-990nm.

[0025] In this embodiment, the first lens 110 and the third lens 140 are mainly used to provide optical power and achieve partial correction of aberrations; the second lens 130 has an achromatic function, which can accurately compensate for the chromatic aberration between the first lens 110 and the third lens 140; the filter 150 only allows light within the designed wavelength band to pass through, preventing light of other wavelengths from entering and affecting the imaging effect. The synergistic effect of the first lens 110, the second lens 130, the third lens 140, and the filter 150 improves the imaging quality of the DMS hyperfocal lens. Furthermore, the metasurface of the second lens 130 has higher processing freedom, allowing for further correction of off-axis aberrations.

[0026] Furthermore, in this embodiment, the aperture stop 120 is located behind the first lens 110 or on the image side of the first lens 110. The design of the aperture stop 120 helps control the path of light through the lens, reducing stray light interference and thus improving image quality. The position of the aperture stop 120 can be adjusted according to actual needs to achieve the best imaging effect. It is understood that the main function of the aperture stop 120 is to intercept and limit light. The aperture of the light beam will be different at different positions. By reasonably setting the size of the aperture stop 120, the same aperture stop 120 effect can be achieved at different positions.

[0027] In one embodiment, the first lens 110 is an aspherical lens with positive optical power, the object side of the first lens 110 is convex and has a positive radius of curvature, and the image side of the first lens 110 is concave and has a positive radius of curvature. The second lens 130 has positive optical power, the object side of the second lens 130 is a plane, the image side of the second lens 130 is a binary plane, and micro-element structures are arranged on the image side of the second lens 130. The third lens 140 is an aspherical lens with positive optical power. The object side of the third lens 140 is concave and has a negative radius of curvature, while the image side of the third lens 140 is convex and has a negative radius of curvature.

[0028] In this embodiment, by combining different lenses and designing the surface shape and optical power of each lens, good imaging effect and optical performance can be achieved. Specifically, the surface shape and different curvature distribution of the object side and image side can achieve a reasonable distribution of the optical power of the lens and effectively balance aberrations such as spherical aberration, coma, and distortion.

[0029] More specifically, the positive optical power characteristic of the first lens 110 allows light to converge better when it passes through it. The convex design on its object side helps to expand the incident range of light, while the concave surface on its image side further converges and adjusts the light, effectively improving aberrations and enhancing image quality.

[0030] More specifically, the positive optical power of the second lens 130 also serves to converge light rays. Its object-side surface is planar, ensuring the stability of incident light. Its image-side surface is a binary surface with arranged micro-structures, each with a specific shape, size, and arrangement. Preferably, the thickness of the second lens 130 is 0.1-0.7 mm. The micro-structures of the second lens 130 are composed of cylindrical, square, and cross-shaped structures, with characteristic dimensions ranging from 80 nm to 350 nm. The micro-structures are arranged in a tetragonal lattice. Based on this micro-structure design, precise control of the phase, amplitude, or polarization state of the incident light wave can be achieved to reduce aberrations and dispersion, and enhance image sharpness and color reproduction.

[0031] More specifically, the positive optical power of the third lens 140 further converges the light rays. The combination of the concave surface on the object side and the convex surface on the image side optimizes the propagation path of the light rays, allowing the light rays to be focused more accurately on the imaging surface 160, thereby improving the imaging resolution.

[0032] In one embodiment, the total optical length of the DMS hyperspectral lens TTL With focal length f The relationship between them satisfies: .

[0033] In this embodiment, the ratio of the total optical length (TTL) to the focal length (f) within this range can effectively reduce aberrations and improve the clarity and quality of the image.

[0034] In one embodiment, the refractive index range of the first lens 110 and the third lens 140 is 1.4-1.7. This refractive index range can effectively balance the light refraction effect with the difficulty of lens manufacturing, ensuring that the light is deflected at an appropriate angle while reducing the cost and complexity of lens production. Furthermore, this refractive index range helps to further optimize aberration correction, allowing the light after passing through the first lens 110 and the third lens 140 to be more accurately focused on the imaging plane 160, thereby improving the overall imaging performance of the DMS superconducting lens and resulting in a final image with higher contrast and richer details.

[0035] Based on the above scheme, the field of view of the DMS hyperfocal lens satisfies: FOV ≥67°.

[0036] Based on the above scheme, the effective aperture of the DMS hyperfocal lens satisfies: D eff ≤4.4 mm .

[0037] Example 1: Exemplary; Table 1 details the specific optical data parameters of each lens in a DMS hyperrefractive lens provided in Embodiment 1 of the present invention, according to a feasible implementation. The optical data parameters in Table 1 correspond to Figure 1 The DMS hyperfoil shown.

[0038] The first lens 110 is an aspherical lens with positive optical power, its object-side surface is convex, and its image-side surface is concave. The second lens 130 is a metasurface lens, its object-side surface is flat, and its image-side surface has micro-elemental structures. The third lens 140 is an aspherical lens with positive optical power, its object-side surface is concave, and its image-side surface is convex. The aperture stop 120 is located on the image-side surface of the first lens 110. Optical parameter data for the DMS hyperfocal lens can be found in the example in Table 1. Table 1

[0039] In Table 1, the surface numbers are assigned according to the surface sequence of each lens. For example, surface number 1 represents the object-side surface of the first lens 110, surface number 2 represents the image-side surface of the first lens 110 and the aperture 120, and so on, with the final surface number 9 representing the imaging surface 160. Here, "Even Asphere" indicates an aspherical surface, "Standard" represents a standard surface, "Binary2" represents a binary surface, and "Infinity" represents a plane. The radius of curvature represents the curvature of the lens surface; a positive value indicates that the surface bends towards the image plane, and a negative value indicates that the surface bends towards the object plane. The spacing represents the central axial distance from the current surface to the next surface; both the radius of curvature and the spacing are in millimeters (mm). The aperture represents the effective light-transmitting diameter of the lens at various positions. The refractive index represents the refractive power of the lens material; the higher the refractive index, the stronger the focusing power of the lens. The Abbe number represents the dispersion of light by the lens material; the higher the Abbe number, the smaller the dispersion of the lens, and the clearer the image. The surface shapes of the first lens 110 and the third lens 140 (aspherical lens) satisfy the following equation: ; in, z This represents the distance from the vertex of an even-order aspherical surface along the optical axis. r Indicates the height from the optical axis. c For curvature 1 / R , R It is the radius of curvature at the vertex of the lens; k A is the conic coefficient, and a2, a3, a4, a5, a6, a7, and a8 are the higher-order coefficients of aspherical surfaces.

[0040] For example, Table 2 details the conic coefficient of the aspherical lens surface in this embodiment according to a feasible implementation. kand the coefficients of higher-order terms a2, a3, a4, a5, a6, a7, a8: Table 2

[0041] In Table 2, -2.62E-01 indicates the specific reference of coefficient k with face number 1, 3.59E-02 indicates the specific reference of coefficient a2 with face number 1, and so on; For example, Table 3 details the metasurface phase of the second lens 130 (i.e., the metasurface lens) in this embodiment with a feasible implementation method: Table 3 Where R1 represents the normalized radius of the binary surface of the metasurface lens, and A1 to A5 represent the coefficients of the metasurface phase.

[0042] Based on the specific optical data parameters exemplified in this embodiment, the distortion magnitude, the effective area size of the metasurface, the refractive index of the first lens 110, the root mean square radius of the central field spot, and the central thickness of the third lens 140 satisfy the following relationship: Total optical length TTL and focal length f satisfy: Effective caliber satisfies: D eff =4.38 mm .

[0043] The DMS hyperspectral lens provided in this embodiment operates in a wavelength band of 940±50nm and has a field of view of Fov=67.71°, which meets the requirements of the DMS system.

[0044] Figure 2 This is a schematic diagram of the modulation curve of the DMS hyperspectral lens provided in Embodiment 1 of the present invention. The DMS hyperspectral lens provided in this embodiment of the present invention has high resolution, at 80 lp / mm Under the specified parameters (i.e., 80 pairs of lines can be resolved per millimeter, where a line pair refers to alternating black and white lines), the lens achieves 80% resolution within the field of view. MTF ≥0.4, the field of view in the center area of ​​the lens reaches MTF ≥0.75; capable of meeting the high-quality imaging requirements of DMS. Among them... MTF The modulation transfer function (MTF) is an important parameter for evaluating the image quality of a lens. Its value ranges from 0 to 1, and the closer it is to 1, the clearer the image.

[0045] Figure 3This is a schematic diagram of the blur pattern of the DMS hyperspectral lens provided in Embodiment 1 of the present invention. The DMS hyperspectral lens provided in Embodiment 1 of the present invention can reach 2 million pixels. The blur pattern is relatively concentrated and uniformly distributed throughout the long wavelength band, which can meet the requirements of high-resolution imaging.

[0046] Figure 4 This is a schematic diagram of the distortion of the DMS hyperspectral lens provided in Embodiment 1 of the present invention. The thermal imaging lens provided in Embodiment 1 of the present invention has small distortion and minimal image deformation, which can meet the requirements of high-quality imaging. Here, +Y represents the field of view.

[0047] Example 2: Exemplary; Table 4 details the specific optical data parameters of each lens in a DMS hyperrefractive lens provided in Embodiment 2 of the present invention, according to a feasible implementation. The optical data parameters in Table 4 correspond to Figure 1 The DMS hyperfoil shown.

[0048] The first lens 110 is an aspherical lens with positive optical power, its object-side surface is convex, and its image-side surface is concave. The second lens 130 is a metasurface lens, its object-side surface is flat, and its image-side surface has micro-elemental structures. The third lens 140 is an aspherical lens with positive optical power, its object-side surface is concave, and its image-side surface is convex. The aperture stop 120 is located on the image-side surface of the first lens 110. Optical parameter data for the DMS hyperfocal lens can be found in the examples in Table 4. Table 4

[0049] In Table 4, the surface numbers are assigned according to the surface sequence of each lens. For example, surface number 1 represents the object-side surface of the first lens 110, surface number 2 represents the image-side surface of the first lens 110 and the aperture 120, and so on, with the final surface number 9 being the imaging surface 160. Here, "Even Asphere" indicates an aspherical surface, "Standard" represents a standard surface, "Binary2" represents a binary surface, and "Infinity" represents a plane. The radius of curvature represents the degree of curvature of the lens surface; a positive value indicates that the surface bends towards the image plane, and a negative value indicates that the surface bends towards the object plane. The spacing represents the central axial distance from the current surface to the next surface; both the radius of curvature and the spacing are in millimeters (mm). The aperture represents the effective light-transmitting diameter of the lens at various positions. The refractive index represents the lens material's ability to refract light; the higher the refractive index, the stronger the focusing ability of the lens. The Abbe number represents the lens material's dispersion of light; the higher the Abbe number, the smaller the dispersion of the lens, and the clearer the image. The surface shapes of the first lens 110 and the third lens 140 (aspherical lens) satisfy the following equation: ; in, z This represents the distance from the vertex of an even-order aspherical surface along the optical axis. r Indicates the height from the optical axis. c For curvature 1 / R , R It is the radius of curvature at the vertex of the lens; k A is the conic coefficient, and a2, a3, a4, a5, a6, a7, and a8 are the higher-order coefficients of aspherical surfaces.

[0050] For example, Table 5 details the conic coefficient of the aspherical lens surface in this embodiment according to a feasible implementation. k and the coefficients of higher-order terms a2, a3, a4, a5, a6, a7, a8: Table 5

[0051] In Table 5, -2.58E-01 represents the coefficient for surface number 1. k Specifically, 3.59E-02 refers to the coefficient a2 with surface number 1, and so on.

[0052] For example, Table 6 details the metasurface phase of the second lens 130 (i.e., the metasurface lens) in this embodiment with a feasible implementation: Table 6 Where R1 represents the normalized radius of the binary surface of the metasurface lens, and A1 to A5 represent the coefficients of the metasurface phase.

[0053] Based on the specific optical data parameters exemplified in this second embodiment, the following relationship is satisfied between the distortion magnitude, the effective area size of the metasurface, the refractive index of the first lens 110, the root mean square radius of the central field spot, and the central thickness of the third lens 140: Total optical length TTL and focal length f satisfy: Effective caliber satisfies: D eff =4.33 mm .

[0054] The DMS hyperspectral lens provided in this embodiment operates at a wavelength of 940±50nm, and its field of view satisfies: Fov =67.68°, which meets the usage requirements of the DMS system.

[0055] Figure 5 This is a schematic diagram of the modulation curve of the DMS hyperspectral lens provided in Embodiment 2 of the present invention. The DMS hyperspectral lens provided in this embodiment of the present invention has high resolution, at 80lp / mm Under the specified parameters (i.e., 80 pairs of lines can be resolved per millimeter, where a line pair refers to alternating black and white lines), the lens achieves 80% resolution within the field of view. MTF ≥0.45, the field of view in the center area of ​​the lens reaches MTF ≥0.7; capable of meeting the high-quality imaging requirements of DMS. Among them... MTF The modulation transfer function (MTF) is an important parameter for evaluating the image quality of a lens. Its value ranges from 0 to 1, and the closer it is to 1, the clearer the image.

[0056] Figure 6 This is a schematic diagram of the blur pattern of the DMS hyperspectral lens provided in Embodiment 2 of the present invention. The DMS hyperspectral lens provided in Embodiment 2 of the present invention can reach 2 million pixels. The blur pattern is relatively concentrated and uniformly distributed throughout the long wavelength band, which can meet the requirements of high-resolution imaging.

[0057] Figure 7 This is a schematic diagram of the distortion of the DMS hyperspectral lens provided in Embodiment 2 of the present invention. The thermal imaging lens provided in Embodiment 2 of the present invention has small distortion and small image deformation, which can meet the requirements of high-quality imaging.

[0058] In summary, the specific solutions of both Embodiment 1 and Embodiment 2 can satisfy the relationships shown in Table 7 below: Table 7

[0059] The DMS hyperspectral lens provided in this invention adopts a hybrid hyperspectral technology, using two traditional resin lenses and one metasurface lens. This hybrid technology effectively compresses the total optical length, achieving miniaturization and lightweight design, and enables high-resolution imaging in a wide wavelength range of 890-990nm. Furthermore, the manufacturing process of the metasurface is relatively simple, employing conventional methods such as photolithography, etching, sputtering, and spraying, resulting in lower costs.

[0060] This invention also provides a camera module, which includes the aforementioned DMS hyperfocal lens.

[0061] This invention also provides a terminal device that includes the aforementioned camera module. This terminal device can be an electronic device such as a vehicle-mounted camera.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A DMS hyperspectral lens, characterized in that, It includes a first lens, an aperture, a second lens, a third lens, and a filter arranged sequentially along the optical axis from the object plane to the image plane; the second lens is a metasurface lens; the first lens and the third lens are resin lenses; The DMS hyperfocal lens satisfies: ; in, D i The distortion size of the DMS hyperspectral lens. D M The effective area size of the metasurface. n 1 represents the refractive index of the material of the first lens. R 0 Let be the root mean square radius of the light spot in the center field of view. th 3 represents the center thickness of the third lens.

2. The DMS hyperspectral lens according to claim 1, characterized in that, The first lens is an aspherical lens with positive optical power, the object side of the first lens is convex, and the image side of the first lens is concave. The second lens has positive optical power, the object side of the second lens is a plane, and the image side of the second lens is a binary plane; micro-element structures are arranged on the image side of the second lens. The third lens is an aspherical lens with positive optical power, the object side of the third lens is concave, and the image side of the third lens is convex.

3. The DMS hyperspectral lens according to claim 2, characterized in that, The object-side surface of the first lens has a positive radius of curvature, and the image-side surface of the first lens has a positive radius of curvature. The object-side surface of the third lens has a negative radius of curvature, and the image-side surface of the third lens also has a negative radius of curvature.

4. The DMS hyperspectral lens according to claim 1, characterized in that, The total optical length of the DMS hyperfocal lens TTL With focal length f The relationship between them satisfies: .

5. The DMS hyperspectral lens according to claim 2, characterized in that, The thickness of the second lens is 0.1-0.7 mm. The microstructure of the second lens is composed of three types: cylindrical, square, and cross-shaped. The characteristic size of the microstructure ranges from 80 nm to 350 nm. The microstructure is arranged in a tetragonal lattice.

6. The DMS hyperspectral lens according to claim 2, characterized in that, The refractive index range of the first lens and the third lens is 1.4-1.

7.

7. The DMS hyperspectral lens according to claim 2, characterized in that, The field of view of the DMS hyperfocal lens satisfies: FOV ≥67°.

8. The DMS hyperspectral lens according to claim 2, characterized in that, The effective aperture of the DMS hyperfocal lens satisfies: D eff ≤4.4 mm .

9. A camera module, characterized in that, Including the DMS hyperfocal lens as described in any one of claims 1-8.

10. A terminal device, characterized in that, Includes the camera module as described in claim 9.

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