Large target surface high-resolution unmanned aerial vehicle lens and electronic device

Abstract

The application discloses a large-target high-resolution unmanned aerial vehicle lens and electronic equipment. The lens is sequentially provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens from an object side to an image side; the first lens has negative refractive power, the object side surface of the lens is a convex surface, and the image side surface of the lens is a concave surface; the second lens has negative refractive power, the object side surface of the lens is a concave surface, and the image side surface of the lens is a concave surface, and the like. The application proposes an innovative optical design in view of the problem that the existing unmanned aerial vehicle lens cannot simultaneously consider light weight, high definition, a large target, a large aperture and a large field of view. Through a glass-plastic hybrid design, the number of glass lenses is reduced, and a 1 / 0.98 inch target surface sensor is matched, so that the unmanned aerial vehicle lens with a large target, a small size and high resolution is realized. The lens can meet the high resolution requirement of more than 50 million pixels, and the imaging quality is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of drone lens technology, and in particular to a large-area, high-resolution drone lens and electronic device. Background Technology

[0002] With the rapid development of drone technology, drones have been widely used in various fields such as aerial photography, military reconnaissance, geographical surveying, crop monitoring, remote sensing mapping, communications, and electronic jamming. Compared with traditional large aircraft, drones have significant technological advantages: they are not limited by terrain, are small and easy to carry, and can flexibly choose shooting angles and operating locations, thus significantly improving the efficiency of shooting and inspection. However, existing drone lens technology still has some shortcomings, limiting its further application potential.

[0003] Existing drone lens designs typically suffer from the following problems: First, the lens structure is lengthy, making it difficult to further reduce the overall size of the drone and meet the demands of miniaturization. Second, the optical resolution is low, failing to effectively improve image clarity and detail. Third, the lens can only be matched with small chip target sizes, limiting the performance of the imaging sensor and thus affecting image quality. These problems make it difficult for existing drone lenses to meet the current industry's dual development trends of miniaturization and high imaging quality. Especially with the increasing demand for high-precision image acquisition, the limitations of existing technologies are becoming increasingly prominent. Therefore, developing a compact, high-resolution drone lens compatible with large-scale chips has become a key direction for promoting drone technology advancement. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a large-area, high-resolution drone lens and electronic device. This lens can at least solve one of the technical shortcomings mentioned in the background art.

[0005] According to one aspect of the present invention, a large-area high-resolution UAV lens is provided, comprising, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens;

[0006] The first lens has negative refractive power, the object side of the lens is convex, and the image side of the lens is concave.

[0007] The second lens has negative refractive power, and the object side of the lens is concave, as is the image side of the lens.

[0008] The third lens has positive refractive power, and the object-side surface of the lens is convex, as is the image-side surface of the lens.

[0009] The fourth lens has positive refractive power, and the object-side surface of the lens is convex, as is the image-side surface of the lens.

[0010] The fifth lens has negative refractive power. The object-side surface of the lens is concave, and the image-side surface of the lens is also concave.

[0011] The sixth lens has positive refractive power, and the object-side surface of the lens is convex, as is the image-side surface of the lens.

[0012] The seventh lens has negative refractive power. The object-side surface of the lens is convex, and the image-side surface of the lens is concave.

[0013] The eighth lens has positive refractive power, and the object-side surface of the lens is convex, as is the image-side surface of the lens.

[0014] The ninth lens has positive refractive power, and its object-side surface is convex while its image-side surface is concave.

[0015] The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are glass lenses; the seventh lens, the eighth lens, and the ninth lens are plastic lenses.

[0016] In the above technical solution, this invention addresses the problem that existing drone lenses cannot simultaneously achieve lightweight, high definition, large sensor size, large aperture, and wide field of view, proposing an innovative optical design. Through a glass-plastic hybrid design, the number of glass lenses used is reduced, while a 1 / 0.98-inch sensor size is used, achieving a large sensor size, small volume, and high resolution drone lens. This lens can meet the high resolution requirements of over 50 million pixels, significantly improving image quality. Specifically:

[0017] (1) The first and second lenses use two negative diopter lenses in succession. By compressing the field of view and expanding the beam, the light is gently deflected to the optical axis, reducing tolerance sensitivity. At the same time, the outer diameter of the subsequent lens is effectively reduced, taking into account the characteristics of large field of view and small volume.

[0018] (2) With the integrated glass-plastic hybrid design, optimized optical path and target surface adaptability, this invention reduces lens cost, shortens the total length of the lens and reduces lens weight, while ensuring good imaging quality of the system, providing technical support for the miniaturization and high performance of UAV lenses.

[0019] In some embodiments, an aperture stop is provided between the third lens and the fourth lens, and the third lens is an aspherical glass lens made of high refractive index material.

[0020] In the above technical solution, the present invention further improves the performance of the drone lens by optimizing the structural design of the optical system. Specifically, an aperture stop is provided between the third lens and the fourth lens, and the third lens is a glass aspherical lens made of a high refractive index material.

[0021] (1) The aperture stop is positioned between the third and fourth lenses. This design effectively controls the incident angle and path of light, optimizing the distribution of light in the optical system. By adjusting the distance between the lenses and the aperture stop, astigmatism can be corrected, especially excelling in correcting coma, distortion, and transverse aberration. This choice of aperture stop position not only improves image quality but also provides greater optimization space for the design of subsequent lenses.

[0022] (2) The third lens is a glass aspherical lens made of high refractive index material. High refractive index material can effectively correct spherical aberration and coma in the optical system, especially under conditions of large field of view and large aperture, which can significantly improve the sharpness and consistency of the image. The design of the aspherical lens can achieve complex light correction functions within a small lens size, thereby reducing the lens spacing and effectively shortening the overall length of the optical system. The combination of high refractive index material and aspherical design can further reduce the tolerance sensitivity of the system while ensuring image quality, and improve production consistency and reliability.

[0023] (3) By optimizing the aperture position and applying aspherical lenses made of high-refractive-index glass, the lens spacing and light path are reduced, significantly lowering the overall size of the lens and meeting the miniaturization needs of UAV lenses. It effectively corrects spherical aberration, coma, astigmatism, distortion, and transverse aberration, ensuring high resolution and large target surface compatibility of the imaging system. The combined design of high-refractive-index materials and aspherical lenses reduces reliance on complex lens groups while improving production efficiency and yield.

[0024] In some embodiments, the lens satisfies the following condition:

[0025] nd3>1.8

[0026] In the formula, nd3 is the refractive index of the third lens.

[0027] In the aforementioned technical solutions, high-refractive-index materials can effectively correct spherical aberration, coma, and chromatic aberration in optical systems, especially under conditions of large aperture and wide field of view, significantly improving image sharpness and consistency. High-refractive-index materials allow for thinner lens designs while achieving complex light correction functions within a smaller lens spacing, thereby effectively shortening the overall length of the optical system and meeting the miniaturization needs of drone lenses. Combined with the design of the aperture stop positioned between the third and fourth lenses, the application of high-refractive-index materials further enhances the performance of the optical system.

[0028] In some embodiments, the fourth lens, the fifth lens, and the sixth lens constitute a cemented triplet lens.

[0029] In the aforementioned technical solution, the cemented triplet lens, through the rational combination of materials with different refractive indices and dispersion coefficients, effectively corrects axial and lateral chromatic aberration, ensuring color consistency and sharpness in the image. The cemented triplet lens design optimizes the light convergence path, reduces spherical aberration and astigmatism, and improves image uniformity and contrast. The cemented design reduces air gaps between lenses, decreasing light reflection and scattering at the interfaces, thus improving system stability and reliability. Furthermore, setting the eighth and ninth lenses to positive refractive inflection facilitates light convergence, ensuring that incident beams from each field of view are accurately deflected and converged onto the imaging plane after passing through the optical system, improving image sharpness and resolution. Positive refractive inflection lenses effectively suppress aberrations such as spherical aberration, chromatic aberration, field curvature, and astigmatism, ensuring high-resolution and high-contrast imaging across the entire field of view. The synergistic effect of the cemented triplet lens and the positive refractive inflection lens ensures high-resolution and high-contrast imaging across the entire field of view, meeting the high-resolution requirements of over 50 million pixels. By optimizing the lens combination and structural design, the overall number and size of lenses were reduced, effectively shortening the overall length of the optical system and reducing the weight of the lens, thus meeting the development needs of miniaturization and lightweighting of drone lenses.

[0030] In summary, by designing the fourth, fifth, and sixth lenses as cemented triplet lenses and setting the eighth and ninth lenses to positive optical diopter, this invention solves the technical challenges of existing drone lenses in terms of chromatic aberration correction, image quality optimization, and miniaturization, demonstrating significant innovation and practicality.

[0031] In some embodiments, the lens satisfies the following condition:

[0032] |nd5-nd4|>0.30;|vd4-vd5|>65;|nd5-nd6|>0.25;|vd6-vd5|>45 Where nd4 is the refractive index of the fourth lens, nd5 is the refractive index of the fifth lens, nd6 is the refractive index of the sixth lens, vd4 is the dispersion coefficient of the fourth lens, vd5 is the dispersion coefficient of the fifth lens, and vd6 is the dispersion coefficient of the sixth lens.

[0033] In the above technical solution, through the above conditional limitation and the design of the triple cemented lens, chromatic aberration is effectively corrected, ensuring that the optical system achieves high-resolution and high-contrast imaging effects within the full field of view, meeting the high resolution requirements of more than 50 million pixels. The refractive index and dispersion coefficient of the fourth lens (positive optical power): 1.4 < nd4 < 1.5, 90 < vd4 < 95. Using a high Abbe number material can effectively reduce dispersion, optimize the light convergence path, and reduce chromatic aberration. The refractive index and dispersion coefficient of the fifth lens (negative optical power): 1.8 < nd5 < 1.9, 20 < vd5 < 30. Using a low Abbe number material can enhance dispersion control, optimize the light divergence path through the negative optical power design, and reduce aberration. The refractive index and dispersion coefficient of the sixth lens (positive optical power): 1.5 < nd6 < 1.6, 70 < vd6 < 80. Using a high Abbe number material can effectively reduce dispersion, optimize the light convergence path through the positive optical power design, and improve imaging quality.

[0034] In summary, the present invention designs the fourth lens, the fifth lens and the sixth lens as a triple cemented lens, and reasonably combines high Abbe number and low Abbe number materials, solving the technical problems of chromatic aberration correction, imaging quality optimization and miniaturization in existing UAV lenses. This design not only improves the performance of the optical system, but also reduces the production cost, with significant innovation and practicality.

[0035] In some embodiments, the first lens, the second lens, the fourth lens, the fifth lens and the sixth lens are glass spherical lenses, and the third lens is a glass aspherical lens; the seventh lens, the eighth lens and the ninth lens are plastic aspherical lenses.

[0036] In the above technical solution, by using aspherical lenses in the third, seventh, eighth, and ninth lenses, the present invention can significantly improve the performance of the optical system. Aspherical lenses can effectively correct aberrations such as spherical aberration, coma, astigmatism, and distortion, especially under conditions of large field of view and large aperture, significantly improving image sharpness and consistency. The application of aspherical lenses effectively corrects various aberrations, ensuring that the optical system achieves high-resolution and high-contrast imaging effects across the entire field of view, meeting the high resolution requirements of over 50 million pixels. By increasing the order of even-order aspherical surfaces, each aspherical lens can undertake more optical functions, thereby reducing the number of lenses used and making the optical system more compact, meeting the development trend of miniaturization and lightweighting of UAV lenses. Aspherical lenses can effectively control the refraction of light in the edge region, reducing edge distortion and improving image uniformity and overall quality. Glass lenses have the characteristics of high refractive index and low dispersion, making them suitable for correcting chromatic aberration and improving image quality; plastic lenses have the advantages of being lightweight and low-cost, making them suitable for aspherical designs to further optimize aberration correction. The combination of glass and plastic lenses reduces the overall number and size of lenses, effectively shortening the overall length of the optical system and reducing lens weight. The use of plastic aspherical lenses reduces reliance on expensive glass materials, while improving production efficiency and yield, and lowering overall production costs.

[0037] In some embodiments, the lens satisfies the following condition:

[0038] 2.1<|(f1 / f)|<2.5; 2.3<|(f2 / f)|<2.6; 1.8<|(f3 / f)|<2.2;

[0039] 3.0<|(f4 / f)|<3.5; 1.2<|(f5 / f)|<1.4; 1.6<|(f6 / f)|<1.8;

[0040] 3.8 < |(f7 / f)| < 6.1; 2.3 < |(f8 / f)| < 2.9; 12.0 < |(f9 / f)| < 145.0; where f is the focal length of the lens, and f1, f2, f3, f4, f5, f6, f7, f8, and f9 are the focal lengths of the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens, respectively.

[0041] In the above technical solution, by precisely defining the ratio between the focal length of each lens and the total focal length of the system, this invention achieves a reasonable allocation of optical power. The focal length ratio design of each lens can effectively control the convergence and divergence paths of light, optimize the distribution of light in the optical system, and thus significantly improve the clarity and consistency of imaging. Through the reasonable allocation of optical power, each lens can work synergistically to effectively correct aberrations such as spherical aberration, coma, astigmatism, and distortion, ensuring that the optical system achieves high-resolution and high-contrast imaging effects across the entire field of view. By rationally allocating optical power, light can be smoothly deflected within the optical system, reducing scattering and deflection angles, thereby reducing tolerance sensitivity and improving the stability and reliability of the system. The optimized design of the focal length ratio of each lens enables the optical system to achieve complex light correction functions within a smaller size, effectively shortening the overall length of the optical system while reducing the weight of the lens, meeting the development needs of miniaturization and lightweighting of UAV lenses.

[0042] In some embodiments, the lens satisfies the following condition:

[0043] 1.5 <nd1<1.7;60<vd1<80;

[0044] 1.4 <nd2<1.6;75<vd2<95;

[0045] 1.8 <nd3<1.9;35<vd3<45;

[0046] 1.4 <nd4<1.6;60<vd4<95;

[0047] 1.7 <nd5<1.9;20<vd5<30;

[0048] 1.5 <nd6<1.6;60<vd6<80;

[0049] 1.5 <nd7<1.7;20<vd7<60;

[0050] 1.6 <nd8<1.7;20<vd8<30;

[0051] 1.5 <nd9<1.7;20<vd9<60;

[0052] In the formula, nd1 to nd9 are the refractive indices of the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens, respectively, and vd1 to vd9 are the dispersion coefficients of the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens, respectively.

[0053] In the aforementioned technical solution, the rational combination of the refractive index and dispersion coefficient of each lens ensures that the optical system achieves high-resolution and high-contrast imaging effects across the entire field of view, meeting the high resolution requirements of over 50 million pixels. By optimizing lens materials and structural design, the number and size of lenses are reduced, effectively shortening the overall length of the optical system and reducing lens weight, thus meeting the trend of miniaturization and lightweighting of drone lenses. The rational combination of high and low Abbe number materials reduces reliance on expensive optical materials, while improving production efficiency and yield, and lowering overall production costs. Specifically…

[0054] According to another aspect of the invention, an electronic device is provided, comprising a large-area high-resolution drone lens as described above; and an image sensor configured to receive an image formed by the large-area high-resolution drone lens.

[0055] In the above technical solution, the advantage of this electronic device relies on a large-area, high-resolution drone lens, which will not be elaborated here. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the structure of Example 1 of the large target area high resolution UAV lens of the present invention;

[0058] Figure 2 This is the MTF curve of Example 1 of the large target area high resolution UAV lens of the present invention;

[0059] Figure 3 This is a field curvature and distortion curve diagram of Example 1 of the large target area high resolution UAV lens of the present invention;

[0060] Figure 4 This is a Lateral Color curve of Example 1 of the large target area high-resolution UAV lens of the present invention;

[0061] Figure 5 This is a schematic diagram of the structure of Example 2 of the large target area high resolution UAV lens of the present invention;

[0062] Figure 6 This is the MTF curve of Example 2 of the large target area high resolution UAV lens of the present invention;

[0063] Figure 7This is a field curvature and distortion curve diagram of Example 2 of the large target area high resolution UAV lens of the present invention;

[0064] Figure 8 This is a Lateral Color curve of Example 2 of the large target area high-resolution UAV lens of the present invention;

[0065] Figure 9 This is a schematic diagram of the structure of Example 3 of the large target area high resolution UAV lens of the present invention;

[0066] Figure 10 This is the MTF curve of Example 3 of the large target area high resolution UAV lens of the present invention;

[0067] Figure 11 This is a field curvature and distortion curve diagram of Example 3 of the large target area high resolution UAV lens of the present invention;

[0068] Figure 12 This is a Lateral Color curve of Example 3 of the large target area high-resolution UAV lens of the present invention;

[0069] Figure 13 This is a schematic diagram of the structure of Example 4 of the large target area high resolution UAV lens of the present invention;

[0070] Figure 14 This is the MTF curve of Example 4 of the large target area high resolution UAV lens of the present invention;

[0071] Figure 15 This is a field curvature and distortion curve diagram of Example 4 of the large target area high resolution UAV lens of the present invention;

[0072] Figure 16 This is a Lateral Color curve of Example 4 of the large target area high-resolution UAV lens of the present invention;

[0073] Figure 17 This is a schematic diagram of the structure of Example 5 of the large target area high resolution UAV lens of the present invention;

[0074] Figure 18 This is the MTF curve of Example 5 of the large target area high resolution UAV lens of the present invention;

[0075] Figure 19 This is a field curvature and distortion curve diagram of Example 5 of the large target area high resolution UAV lens of the present invention;

[0076] Figure 20 This is a Lateral Color curve of Example 5 of the large target area high-resolution UAV lens of the present invention;

[0077] Figure 21 This is a schematic diagram of the structure of Example 6 of the electronic device of the present invention. Detailed Implementation

[0078] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the invention. Similarly, the following embodiments are only some, not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0079] The purpose of this invention is to provide a large-area, high-resolution drone lens and electronic device with high optical performance. Embodiments according to the invention will now be described in detail with reference to the accompanying drawings.

[0080] Figure 1 , Figure 5 , Figure 9 , Figure 13 , Figure 17 These are cross-sectional views of large-area high-resolution drone lenses (optical systems) according to Examples 1 to 5. The large-area high-resolution drone lenses according to each example are used in drone cameras including interchangeable-lens or non-interchangeable-lens models. In each cross-sectional view, the left side is the object-side OBJ and the right side is the image-side IMA. In each cross-sectional view, Li represents the i-th lens, ST represents the aperture stop (fixed aperture stop or visible aperture stop), and G1 represents the protective glass & filter. IMA represents the image plane, and when the large-area high-resolution drone lenses 1 to 5 according to each example are used in interchangeable-lens or non-interchangeable-lens drone cameras, solid-state imaging elements (photoelectric conversion elements), such as CMOS image sensors or CCD image sensors, are arranged on the image plane IMA.

[0081] Based on the large target area high-resolution UAV lenses of each example, from the object side to the image side, they are in the following order: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, and ninth lens L9.

[0082] The first lens L1 has negative refractive power, with a convex object-side surface and a concave image-side surface; the second lens L2 has negative refractive power, with a concave object-side surface and a concave image-side surface; the third lens L3 has positive refractive power, with a convex object-side surface and a convex image-side surface; the fourth lens L4 has positive refractive power, with a convex object-side surface and a convex image-side surface; the fifth lens L5 has negative refractive power, with a concave object-side surface and a concave image-side surface; the sixth lens L6 has positive refractive power, with a convex object-side surface and a concave image-side surface. The image-side surface of the lens is convex; the seventh lens L7 has negative refractive power, the object-side surface of the lens is convex, and the image-side surface of the lens is concave; the eighth lens L8 has positive refractive power, the object-side surface of the lens is convex, and the image-side surface of the lens is convex; the ninth lens L9 has positive refractive power, the object-side surface of the lens is convex, and the image-side surface of the lens is concave; the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are glass lenses; the seventh lens L7, the eighth lens L8, and the ninth lens L9 are plastic lenses.

[0083] An aperture stop ST is provided between the third lens L3 and the fourth lens L4, and the third lens L3 is a high-refractive-index glass aspherical lens. The first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are glass spherical lenses, and the third lens L3 is a glass aspherical lens; the seventh lens L7, the eighth lens L8, and the ninth lens L9 are plastic aspherical lenses. The fourth lens L4, the fifth lens L5, and the sixth lens L6 form a cemented triode lens.

[0084] The large-area, high-resolution drone lenses in each example can satisfy at least one of the following settings 1) to 6):

[0085] 1) |nd5-nd4|>0.30; |vd4-vd5|>65; |nd5-nd6|>0.25; |vd6-vd5|>45;

[0086] 2)2.1<|(f1 / f)|<2.5; 2.3<|(f2 / f)|<2.6; 1.8<|(f3 / f)|<2.2; 3.0<|

[0087] (f4 / f)|<3.5; 1.2<|(f5 / f)|<1.4; 1.6<|(f6 / f)|<1.8; 3.8<|(f7 / f)

[0088] |<6.1;2.3<|(f8 / f)|<2.9;12.0<|(f9 / f)|<145.0;

[0089] 3) 1.5 <nd1<1.7;60<vd1<80;1.4<nd2<1.6;75<vd2<95;1.8<nd3<1.9;

[0090] 35 <vd3<45;1.4<nd4<1.6;60<vd4<95;1.7<nd5<1.9;20<vd5<30;

[0091] 1.5 <nd6<1.6;60<vd6<80;1.5<nd7<1.7;20<vd7<60;1.6<nd8<1.7;

[0092] 20 <vd8<30;1.5<nd9<1.7;20<vd9<60;

[0093] In the above conditional expressions, nd4 is the refractive index of the fourth lens, nd5 is the refractive index of the fifth lens, nd6 is the refractive index of the sixth lens, vd4 is the dispersion coefficient of the fourth lens, vd5 is the dispersion coefficient of the fifth lens, and vd6 is the dispersion coefficient of the sixth lens; f is the focal length of the lens, f1, f2, f3, f4, f5, f6, f7, f8, and f9 are the focal lengths of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses, respectively; nd1 to nd9 are the refractive indices of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses, respectively; and vd1 to vd9 are the dispersion coefficients of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses, respectively.

[0094] A detailed description of large-area, high-resolution UAV lenses based on various examples is now provided.

[0095] Please refer to the optical structure of Example 1. Figure 1 The specific parameters of Example 1 are shown in Tables 1 and 2 below. In Example 1, the lens focal length f' = 9.31 mm, the effective diameter of the first lens element is 25.963 mm, and the target surface height is 16.384 mm.

[0096] Table 1 Example 1 Parameter Table

[0097]

[0098]

[0099] Table 2 Example 1 Aspherical Surface Parameter Table

[0100]

[0101] Figure 2The MTF curve for Example 1 shows that the MTF across the entire field of view is greater than 0.38 at 156 lp / mm. Figure 3 Example 1 shows the field curvature and distortion curves. The field curvature curves for each wavelength overlap, and the field curvature values ​​are all less than 0.06 mm. Figure 4 Example 1 shows the Lateral Color curve, with lens magnification chromatic aberration correction less than 4µm.

[0102] Please refer to the optical structure of Example 2. Figure 5 The specific parameters for Example 2 are shown in Tables 3 and 4 below. In Example 2, the focal length f' = 9.32 mm, the effective diameter of the first lens is 26.103 mm, and the target height is 16.426 mm.

[0103] Table 3 Example 2 Parameter Table

[0104]

[0105]

[0106] Table 4 Example 2 Aspherical Surface Parameter Table

[0107]

[0108]

[0109] Figure 6 The MTF curve for Example 2 shows that the MTF across the entire field of view is greater than 0.38 at 156 lp / mm. Figure 7 Example 2 shows the field curvature and distortion curves. The field curvature curves for each wavelength overlap, and the field curvature values ​​are all less than 0.06 mm. Figure 8 Example 2 shows the Lateral Color curve, with lens magnification chromatic aberration correction less than 4µm.

[0110] Please refer to the optical structure of Example 3. Figure 9 The specific parameters of Example 3 are shown in Tables 5 and 6 below. In Example 3, the lens focal length f' = 9.31 mm, the effective diameter of the first lens element is 26.464 mm, and the target height is 16.400 mm.

[0111] Table 5 Example 3 Parameter Table

[0112]

[0113] Table 6 Example 3 Aspherical Surface Parameter Table

[0114]

[0115]

[0116] Figure 10The MTF curve for Example 3 shows that the MTF across the entire field of view is greater than 0.38 at 156 lp / mm. Figure 11 Example 3 shows the field curvature and distortion curves. The field curvature curves for each wavelength overlap, and the field curvature values ​​are all less than 0.06 mm. Figure 12 Example 3 shows the Lateral Color curve, with lens magnification chromatic aberration correction less than 4µm.

[0117] Please refer to the optical structure of Example 4. Figure 13 The specific parameters of Example 4 are shown in Tables 7 and 8 below. In Example 4, the lens focal length f' = 9.31 mm, the effective diameter of the first lens element is 26.109 mm, and the target surface height is 16.384 mm.

[0118] Table 7 Example 4 Parameter Table

[0119]

[0120]

[0121] Table 8 Example 4 Aspherical Surface Parameter Table

[0122]

[0123] Figure 14 The MTF curve for Example 4 shows that the MTF across the entire field of view is greater than 0.38 at 156 lp / mm. Figure 15 Example 4 shows the field curvature and distortion curves. The field curvature curves for each wavelength overlap, and the field curvature values ​​are all less than 0.06 mm. Figure 16 Example 4 shows the Lateral Color curve, with lens magnification chromatic aberration correction less than 4µm.

[0124] Please refer to the optical structure of Example 5. Figure 17 The specific parameters of Example 5 are shown in Tables 9 and 10 below. In Example 5, the lens focal length f' = 9.26 mm, the effective diameter of the first lens element is 25.720 mm, and the target surface height is 16.448 mm.

[0125] Table 9 Example 5 Parameter Table

[0126]

[0127]

[0128] Table 10 Example 5 Aspherical Surface Parameter Table

[0129]

[0130]

[0131] Figure 18 Example 5 shows the MTF curve. The MTF across the entire field of view is greater than 0.38 at 156 lp / mm. Figure 19 Example 5 shows the field curvature and distortion curves. The field curvature curves for each wavelength overlap, and the field curvature values ​​are all less than 0.06 mm. Figure 20 Example 5 shows the Lateral Color curve, with lens magnification chromatic aberration correction less than 4µm.

[0132] Based on Examples 1 to 5, this invention offers the following advantages: Optimized lens effective diameter and system size: By limiting the effective lens diameter to less than φ26mm, this invention significantly reduces the physical size of the lens while ensuring the performance of the optical system. This design makes the lens more compact, meeting the miniaturization and lightweight requirements of UAVs. With a focal length F less than 10mm and a horizontal field of view (HFOV) of 85°, this invention achieves wide-angle imaging, covering a wider area, making it particularly suitable for applications such as aerial photography and surveillance. The total lens weight is less than 32g. Through a glass-plastic hybrid design, the number of glass lenses used is reduced, while the lightweight properties of the plastic lenses are utilized to significantly reduce the lens weight, improving the UAV's endurance and maneuverability. MTF performance: At a frequency of 156lp / mm, the modulation transfer function (MTF) value across the entire field of view is greater than 0.38, ensuring high imaging resolution and image sharpness. Target Height Matching: The target height is greater than or equal to 16.384mm, which can match a large 1 / 0.98-inch target sensor, ensuring that the imaging surface covers the entire sensor and improving image integrity and quality. Principal Ray Angle (CRA): The principal ray angle (CRA) of the imaging surface is 12°, matching the sensor, optimizing the light incident angle, reducing light deflection on the sensor, and improving image uniformity and color reproduction. Aperture F / NO is 1.4. The large aperture design significantly increases the amount of light entering the system, improving imaging performance in low-light environments, while also enhancing depth-of-field control capabilities, further improving image quality.

[0133] Through the above design, the present invention achieves significant technical progress in the following aspects:

[0134] Improved imaging quality: The high resolution, wide field of view, and large aperture design ensure high imaging quality of the optical system in various environments, meeting the high resolution requirements of over 50 million pixels.

[0135] System miniaturization and lightweighting: By optimizing lens materials and structural design, the number and size of lenses are reduced, effectively shortening the overall length of the optical system and reducing the weight of the lens, thus meeting the development trend of miniaturization and lightweighting of drone lenses.

[0136] Reduced production costs: The hybrid glass-plastic design and reasonable combination of high Abbe number and low Abbe number materials reduce the dependence on expensive optical materials, while improving production efficiency and yield, thus reducing overall production costs.

[0137] Color reproduction and uniformity: By optimizing the light path and correcting aberrations, color consistency and uniformity of the image are ensured, thus improving the visual effect of the image.

[0138] In summary, this invention solves the technical challenges of existing drone lenses in terms of chromatic aberration correction, image quality optimization, and miniaturization by precisely defining the refractive index and dispersion coefficient of each lens, combined with aspherical design and material optimization. It has significant innovation and practicality.

[0139] Example 6

[0140] For reference Figure 21 A description of an electronic device A according to Example 6 of the present invention will be given. Figure 21 This is a schematic diagram of an electronic device (drone camera) used for a camera optical system in any of the large-area high-resolution drone lenses according to Examples 1 to 5.

[0141] exist Figure 21 In the figures, reference numeral A2 indicates the main body of the electronic device, and reference numeral A1 indicates any of the camera optical systems (interchangeable lenses) including the large-area, high-resolution drone lenses according to Examples 1 to 6. Reference numeral A3 indicates an image sensor (photoelectric conversion element) such as a CMOS image sensor or a CCD image sensor, which is built into the camera body A2 and receives light (the optical image formed by the camera optical system 11) from the camera optical system A1 and performs photoelectric conversion.

[0142] By using a large-area, high-resolution drone lens according to any one of Examples 1 to 6 in electronic devices such as digital still cameras, electronic devices with high optical performance can be obtained.

[0143] Each example can provide electronic devices with high optical performance.

[0144] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims will be given the broadest interpretation to cover all such modifications and equivalent structures and functions.

Claims

1. A large-area, high-resolution UAV lens, characterized in that, The lens has nine lenses with diopter, which are arranged in the following order from the object side to the image side: first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens. The first lens has negative refractive power, the object side of the lens is convex, and the image side of the lens is concave. The second lens has negative refractive power, and the object side of the lens is concave, as is the image side of the lens. The third lens has positive refractive power, and the object-side surface of the lens is convex, as is the image-side surface of the lens. The fourth lens has positive refractive power, and the object-side surface of the lens is convex, as is the image-side surface of the lens. The fifth lens has negative refractive power. The object-side surface of the lens is concave, and the image-side surface of the lens is also concave. The sixth lens has positive refractive power, and the object-side surface of the lens is convex, as is the image-side surface of the lens. The seventh lens has negative refractive power. The object-side surface of the lens is convex, and the image-side surface of the lens is concave. The eighth lens has positive refractive power, and its object-side surface is convex while its image-side surface is concave. The ninth lens has positive refractive power, and its object-side surface is convex while its image-side surface is concave. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are glass lenses; the seventh lens, the eighth lens, and the ninth lens are plastic lenses. An aperture stop is provided between the third lens and the fourth lens, and the third lens is a glass aspherical lens; The fourth lens, the fifth lens, and the sixth lens together form a cemented three-layer lens; The lens satisfies the following condition: nd3>1.8 In the formula, nd3 is the refractive index of the third lens.

2. The large-area, high-resolution UAV lens as described in claim 1, characterized in that, The lens satisfies the following condition: |nd5-nd4|>0.30; |vd4-vd5|>65; |nd5-nd6|>0.25; |vd6-vd5|>45 In the formula, nd4 is the refractive index of the fourth lens, nd5 is the refractive index of the fifth lens, nd6 is the refractive index of the sixth lens, vd4 is the dispersion coefficient of the fourth lens, vd5 is the dispersion coefficient of the fifth lens, and vd6 is the dispersion coefficient of the sixth lens.

3. The large-area, high-resolution UAV lens as described in claim 1, characterized in that, The first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens are glass spherical lenses, the third lens is a glass aspherical lens, and the seventh lens, the eighth lens, and the ninth lens are plastic aspherical lenses.

4. The large-area, high-resolution UAV lens as described in claim 1, characterized in that, The lens satisfies the following condition: 2.1<|(f1 / f)|<2.5; 2.3<|(f2 / f)|<2.6; 1.8<|(f3 / f)|<2.2; 3.0<|(f4 / f)|<3.5; 1.2<|(f5 / f)|<1.4; 1.6<|(f6 / f)|<1.8; 3.8<|(f7 / f)|<6.1; 2.3<|(f8 / f)|<2.9; 12.0<|(f9 / f)|<145.0; In the formula, f is the focal length of the lens, and f1, f2, f3, f4, f5, f6, f7, f8, and f9 are the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens, respectively.

5. A large-area, high-resolution UAV lens as described in claim 1, characterized in that, The lens satisfies the following condition: 1.5 <nd1<1.7;60<vd1<80; 1.4 <nd2<1.6;75<vd2<95; 1.8 <nd3<1.9;35<vd3<45; 1.4 <nd4<1.6;60<vd4<95; 1.7 <nd5<1.9;20<vd5<30; 1.5 <nd6<1.6;60<vd6<80; 1.5 <nd7<1.7;20<vd7<60; 1.6 <nd8<1.7;20<vd8<30; 1.5 <nd9<1.7;20<vd9<60; In the formula, nd1 to nd9 are the refractive indices of the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens, respectively, and vd1 to vd9 are the dispersion coefficients of the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens, respectively.

6. An electronic device, characterized in that, A large-area, high-resolution UAV lens according to any one of claims 1-5; and An image sensor is configured to receive images formed by the large-area, high-resolution UAV lens.

Images