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

Abstract

The invention discloses a large-target-surface high-resolution unmanned aerial vehicle lens and electronic equipment. The lens sequentially comprises 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 diopter, 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 diopter, the object side surface of the lens is a concave surface, and the image side surface of the lens is a concave surface. The invention provides an innovative optical design for solving the problem that an existing unmanned aerial vehicle lens cannot give consideration to light weight, high definition, large target surface, large aperture and large field angle. Through the glass-plastic mixed design, the use number of glass lenses is reduced, and meanwhile, the unmanned aerial vehicle lens with a large target surface, a small size and high resolution is realized by matching with a sensor with a 1 / 0.98 inch target surface. The lens can meet the high resolution requirement of more than five million pixels, and the imaging quality is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of UAV lenses, and particularly to a large image circle and high-resolution UAV lens and an electronic device. Background Art

[0002] With the rapid development of UAV technology, UAVs have been widely used in multiple fields such as aerial photography, military reconnaissance, geographical surveying, crop monitoring, remote sensing mapping, communication, and electronic jamming. Compared with traditional large aircraft, UAVs have significant technical advantages: they are not restricted by terrain, are small and portable, and can flexibly select shooting angles and operation locations, thus significantly improving the efficiency of shooting and detection. However, there are still several deficiencies in the existing UAV lens technology, which limit its further application potential.

[0003] The existing UAV lens designs usually have the following problems: First, the lens structure is long, resulting in difficulty in further reducing the overall volume of the UAV and making it difficult to meet the development requirements of miniaturization; second, the optical resolution is low, and it is unable to effectively improve the clarity and detail performance of images; third, the chip image circle size that the lens can match is small, restricting the performance of the imaging sensor and thus affecting the image quality. These problems make it difficult for existing UAV lenses to meet the dual development trends of miniaturization and high imaging quality in the current industry. Especially in the context of the increasing demand for high-precision image acquisition, the limitations of the existing technology are becoming more prominent. Therefore, developing a UAV lens with a compact structure, high resolution, and compatible with large image circle chips has become a key direction to promote the progress of UAV technology. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a large image circle and high-resolution UAV lens and an electronic device. This lens can at least solve one of the technical drawbacks mentioned in the background art.

[0005] According to one aspect of the present invention, there is provided a large image circle and high-resolution UAV lens, which sequentially includes 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 the object side to the image side;

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

[0007] The second lens has a negative refractive power, the object side surface of this lens is concave, and the image side surface of this lens is concave;

[0008] The third lens has a positive refractive power, the object side surface of this lens is convex, and the image side surface of this lens is convex;

[0009] The fourth lens has a positive refractive power, the object side of the lens is convex, and the image side of the lens is convex;

[0010] The fifth lens has a negative refractive power, the object side of the lens is concave, and the image side of the lens is concave;

[0011] The sixth lens has a positive refractive power, the object side of the lens is convex, and the image side of the lens is convex;

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

[0013] The eighth lens has a positive refractive power, the object side of the lens is convex, and the image side of the lens is convex;

[0014] The ninth lens has a positive refractive power, the object side of the lens is convex, and the image side of the lens 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, the present invention aims at the problem that the existing UAV lenses cannot balance lightweight, high definition, large target surface, large aperture and large field of view, and proposes an innovative optical design. Through the hybrid glass and plastic design, the number of glass lenses is reduced, and at the same time, a sensor with a 1 / 0.98-inch target surface is matched to achieve a UAV lens with a large target surface, small volume and high resolution. This lens can meet the high resolution requirements of more than 50 million pixels, significantly improving the imaging quality. Specifically:

[0017] (1) The first lens and the second lens continuously use two lenses with negative refractive powers. By compressing the field of view angle and expanding the light beam, the light is gently deflected towards the optical axis direction, reducing the tolerance sensitivity, and at the same time effectively reducing the outer diameter size of the subsequent lenses, balancing the characteristics of a large field of view angle and a small volume;

[0018] (2) By comprehensively considering the hybrid glass and plastic design, optimized optical path and target surface adaptability, the present invention reduces the lens cost, shortens the total lens length, and reduces the 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, a diaphragm is provided between the third lens and the fourth lens, and the third lens is made of a glass aspherical lens with a high refractive index material.

[0020] In the above technical solution, the present invention further improves the performance of the UAV lens by optimizing the structural design of the optical system. Specifically, a diaphragm is disposed 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 diaphragm is disposed between the third lens and the fourth lens. This design can effectively control the incident angle and path of light, and optimize the distribution of light in the optical system. By adjusting the distance between the lens and the diaphragm, astigmatism can be corrected, and it is particularly excellent in correcting coma, distortion, and lateral aberration. This selection of the diaphragm position not only improves the imaging quality but also provides a greater optimization space for the design of subsequent lenses.

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

[0023] (3) Through the optimization of the diaphragm position and the application of the glass aspherical lens made of a high refractive index material, the lens spacing is reduced and the light path is optimized, significantly reducing the overall size of the lens and meeting the development requirements of the miniaturization of the UAV lens. It effectively corrects spherical aberration, coma, astigmatism, distortion, and lateral aberration, ensuring the high resolution and large target surface compatibility of the imaging system. The combined design of the high refractive index material and the aspherical lens reduces the dependence on complex lens groups, while improving the production efficiency and the yield rate.

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

[0025] nd3>1.8

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

[0027] In the above technical solution, the high refractive index material can effectively correct the spherical aberration, coma, and chromatic aberration of the optical system. Especially under the conditions of a large aperture and a large field of view angle, it can significantly improve the clarity and consistency of imaging. The high refractive index material allows the lens to be designed thinner, and at the same time, complex light correction functions can be achieved within a smaller lens spacing, thereby effectively shortening the total length of the optical system and meeting the development requirements of the miniaturization of the UAV lens. Combining with the design that the diaphragm is disposed between the third lens and the fourth lens, the application of the high refractive index material further enhances the performance of the optical system.

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

[0029] In the above technical solution, by reasonably matching materials with different refractive indices and dispersion coefficients, the triplet lens can effectively correct axial chromatic aberration and lateral chromatic aberration, ensuring color consistency and clarity of imaging. The design of the triplet lens can optimize the light convergence path, reduce spherical aberration and astigmatism, and improve the imaging uniformity and contrast. The cemented design reduces the air gap between the lenses, reduces the reflection and scattering of light at the interfaces, and improves the stability and reliability of the system. In addition, the eighth lens and the ninth lens are set to have positive optical power. The positive optical power design helps the convergence of light, ensuring that the incident light beams in each field of view can be accurately deflected and converged on the imaging surface after passing through the optical system, improving the clarity and resolution of imaging. The positive optical power lens can effectively suppress aberration phenomena such as spherical aberration, chromatic aberration, field curvature, and astigmatism, ensuring that the optical system achieves high-resolution and high-contrast imaging effects within the full field of view. The combined action of the triplet lens and the positive optical power lens ensures 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. By optimizing the lens combination and structural design, the total number and size of the lenses are reduced, effectively shortening the total length of the optical system, while reducing the weight of the lens, meeting the development requirements of miniaturization and light weight of the UAV lens.

[0030] In summary, the present invention designs the fourth lens, the fifth lens, and the sixth lens as a triplet lens, and sets the eighth lens and the ninth lens to have positive optical power, solving the technical problems of chromatic aberration correction, imaging quality optimization, and miniaturization in the existing UAV lenses, and having significant innovation and practicality.

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

[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 limitations 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 over 50 million pixels. The refractive index and dispersion coefficient of the fourth lens (positive focal 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 focal 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 focal power design, and reduce aberration. The refractive index and dispersion coefficient of the sixth lens (positive focal 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 focal 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 production costs, having 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 lens, seventh lens, eighth lens, and ninth lens, the present invention can significantly improve the performance of the optical system. Aspherical lenses can effectively correct aberration phenomena such as spherical aberration, coma, astigmatism, and distortion. Especially under the conditions of large field of view angle and large aperture, the imaging clarity and consistency are significantly improved. The application of aspherical lenses effectively corrects various aberrations, ensuring that the optical system achieves high-resolution and high-contrast imaging effects within the entire field of view, meeting the high resolution requirements of more than 50 million pixels. By increasing the order of the even aspherical surface, each aspherical lens can undertake more optical functions, thereby reducing the number of lenses used, making the optical system more compact, and meeting the development trend of miniaturization and lightweight of UAV lenses. Aspherical lenses can effectively control the deflection of light in the edge region, reduce edge distortion, and improve the imaging uniformity and overall quality. Glass lenses have the characteristics of high refractive index and low dispersion, which are suitable for correcting chromatic aberration and improving imaging quality; plastic lenses have the advantages of lightweight and low cost, and are suitable for aspherical design to further optimize aberration correction. The combined design of glass and plastic lenses reduces the total number and size of lenses, effectively shortens the total length of the optical system, and at the same time reduces the weight of the lens. The use of plastic aspherical lenses reduces the dependence on expensive glass materials, improves production efficiency and yield rate, and reduces the overall production cost.

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

[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, 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 proportional relationship between the focal lengths of each lens and the total focal length of the system, the present invention realizes a reasonable distribution of optical power. The design of the focal length ratio of each lens can effectively control the convergence and divergence paths of light rays, optimize the distribution of light rays in the optical system, thereby significantly improving the clarity and consistency of imaging. By reasonably distributing the optical power, each lens can cooperate effectively to correct aberration phenomena such as spherical aberration, coma, astigmatism, and distortion, ensuring that the optical system achieves high-resolution and high-contrast imaging effects within the full field of view. By reasonably distributing the optical power, the light rays can be deflected gently in the optical system, reducing the scattering and deflection angle of the light rays, thereby reducing the 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 ray correction functions within a smaller size, effectively shortening the total length of the optical system and reducing the weight of the lens, meeting the development requirements of miniaturization and lightweight of the UAV lens.

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

[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] Wherein, nd1 to nd9 are the refractive indices 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, and vd1 to vd9 are the dispersion coefficients 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.

[0053] In the above technical solution, the reasonable combination of the refractive index and dispersion coefficient of each lens ensures 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. By optimizing the lens material and structural design, the number and size of the lenses are reduced, effectively shortening the total length of the optical system, while reducing the weight of the lens, meeting the development trend of miniaturization and light weight of the UAV lens. The reasonable combination of high Abbe number and low Abbe number materials reduces the dependence on expensive optical materials, while improving production efficiency and product qualification rate, and reducing the overall production cost. Specifically.

[0054] According to another aspect of the present invention, there is provided an electronic device, including a large target surface high-resolution UAV lens according to the above; and an image sensor configured to receive an image formed by the large target surface high-resolution UAV lens.

[0055] In the above technical solution, the advantages of the electronic device depend on the large target surface high-resolution UAV lens, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0057] Figure 1 is a schematic structural diagram of Example 1 of the large target surface high-resolution UAV lens of the present invention;

[0058] Figure 2 is an MTF curve graph of Example 1 of the large target surface high-resolution UAV lens of the present invention;

[0059] Figure 3 is a field curvature & distortion curve graph of Example 1 of the large target surface high-resolution UAV lens of the present invention;

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

[0061] Figure 5 is a schematic structural diagram of Example 2 of the large target surface high-resolution UAV lens of the present invention;

[0062] Figure 6 is an MTF curve graph of Example 2 of the large target surface high-resolution UAV lens of the present invention;

[0063] Figure 7It is the field curvature & distortion curve graph of Example 2 of the large image circle and high-resolution UAV lens of the present invention;

[0064] Figure 8 It is the Lateral Color curve graph of Example 2 of the large image circle and high-resolution UAV lens of the present invention;

[0065] Figure 9 It is the structural schematic diagram of Example 3 of the large image circle and high-resolution UAV lens of the present invention;

[0066] Figure 10 It is the MTF curve graph of Example 3 of the large image circle and high-resolution UAV lens of the present invention;

[0067] Figure 11 It is the field curvature & distortion curve graph of Example 3 of the large image circle and high-resolution UAV lens of the present invention;

[0068] Figure 12 It is the Lateral Color curve graph of Example 3 of the large image circle and high-resolution UAV lens of the present invention;

[0069] Figure 13 It is the structural schematic diagram of Example 4 of the large image circle and high-resolution UAV lens of the present invention;

[0070] Figure 14 It is the MTF curve graph of Example 4 of the large image circle and high-resolution UAV lens of the present invention;

[0071] Figure 15 It is the field curvature & distortion curve graph of Example 4 of the large image circle and high-resolution UAV lens of the present invention;

[0072] Figure 16 It is the Lateral Color curve graph of Example 4 of the large image circle and high-resolution UAV lens of the present invention;

[0073] Figure 17 It is the structural schematic diagram of Example 5 of the large image circle and high-resolution UAV lens of the present invention;

[0074] Figure 18 It is the MTF curve graph of Example 5 of the large image circle and high-resolution UAV lens of the present invention;

[0075] Figure 19 It is the field curvature & distortion curve graph of Example 5 of the large image circle and high-resolution UAV lens of the present invention;

[0076] Figure 20 It is the Lateral Color curve graph of Example 5 of the large image circle and high-resolution UAV lens of the present invention;

[0077] Figure 21 It is the structural schematic diagram of Example 6 of the electronic device of the present invention. Detailed Implementation Modes

[0078] The following will further describe the present invention in detail in conjunction with the accompanying drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0079] The object of the present invention is to provide a large target surface high-resolution UAV lens and an electronic device with high optical performance. Embodiments according to the present invention will now be described in detail with reference to the accompanying drawings.

[0080] Figure 1 、 Figure 5 、 Figure 9 、 Figure 13 、 Figure 17 are cross-sectional views of large target surface high-resolution UAV lenses (optical systems) according to Examples 1 to 5, respectively. The large target surface high-resolution UAV lenses according to each example are used for a UAV camera with a replaceable lens or a UAV camera with a non-replaceable lens. 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 (fixed aperture or visible aperture), and G1 represents the protective glass & filter. IMA represents the image plane, and when the large target surface high-resolution UAV lenses 1 to 5 according to each example are used for a UAV camera with a replaceable lens or a UAV camera with a non-replaceable lens, a solid-state imaging element (photoelectric conversion element) such as a CMOS image sensor or a CCD image sensor is arranged on the imaging plane IMA.

[0081] For the large target surface high-resolution UAV lenses according to each example, from the object side to the image side in sequence are the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, and the ninth lens L9;

[0082] The first lens L1 has a negative refractive power. The object side of this lens is convex, and the image side of this lens is concave. The second lens L2 has a negative refractive power. The object side of this lens is concave, and the image side of this lens is concave. The third lens L3 has a positive refractive power. The object side of this lens is convex, and the image side of this lens is convex. The fourth lens L4 has a positive refractive power. The object side of this lens is convex, and the image side of this lens is convex. The fifth lens L5 has a negative refractive power. The object side of this lens is concave, and the image side of this lens is concave. The sixth lens L6 has a positive refractive power. The object side of this lens is convex, and the image side of this lens is convex. The seventh lens L7 has a negative refractive power. The object side of this lens is convex, and the image side of this lens is concave. The eighth lens L8 has a positive refractive power. The object side of this lens is convex, and the image side of this lens is convex. The ninth lens L9 has a positive refractive power. The object side of this lens is convex, and the image side of this 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 disposed between the third lens L3 and the fourth lens L4, and the third lens L3 is a glass aspherical lens made of a high refractive index material. 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 triple cemented lens.

[0084] The large target surface high-resolution UAV lens according to each example can satisfy at least one of the following setting conditions 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, and f1, f2, f3, f4, f5, f6, f7, f8, 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; 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.

[0094] Now, a detailed description of the large image plane high-resolution UAV lens according to each example will be given.

[0095] For the optical structure of Example 1, please refer to Figure 1 , and the specific parameters of this Example 1 are shown in Tables 1 and 2 below. In this Example 1, the lens focal length f' = 9.31 mm, the effective diameter of the first lens is 25.963 mm, and the image plane height is 16.384 mm.

[0096] Table 1 Parameter Table of Example 1

[0097]

[0098]

[0099] Table 2 Aspherical Parameter Table of Example 1

[0100]

[0101] Figure 2For the MTF curve graph of Example 1, the MTF of the full field of view is greater than 0.38 at 156 lp / mm. Figure 3 For the field curvature & distortion curve graph of Example 1, the field curvature curves of each wavelength coincide, and the field curvature values are all less than 0.06 mm. Figure 4 For the Lateral Color curve graph of Example 1, the correction of the lens magnification chromatic aberration is less than 4 μm.

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

[0103] Table 3 Parameter Table of Example 2

[0104]

[0105]

[0106] Table 4 Aspherical Parameter Table of Example 2

[0107]

[0108]

[0109] Figure 6 For the MTF curve graph of Example 2, the MTF of the full field of view is greater than 0.38 at 156 lp / mm. Figure 7 For the field curvature & distortion curve graph of Example 2, the field curvature curves of each wavelength coincide, and the field curvature values are all less than 0.06 mm. Figure 8 For the Lateral Color curve graph of Example 2, the correction of the lens magnification chromatic aberration is less than 4 μm.

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

[0111] Table 5 Parameter Table of Example 3

[0112]

[0113] Table 6 Aspherical Parameter Table of Example 3

[0114]

[0115]

[0116] Figure 10For the MTF curve graph of Example 3, the MTF of the full field of view is greater than 0.38 at 156 lp / mm. Figure 11 For the field curvature & distortion curve graph of Example 3, the field curvature curves of each wavelength coincide, and the field curvature values are all less than 0.06 mm. Figure 12 For the Lateral Color curve graph of Example 3, the correction of the lens magnification chromatic aberration is less than 4 μm.

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

[0118] Table 7 Parameters Table of Example 4

[0119]

[0120]

[0121] Table 8 Aspherical Parameter Table of Example 4

[0122]

[0123] Figure 14 For the MTF curve graph of Example 4, the MTF of the full field of view is greater than 0.38 at 156 lp / mm. Figure 15 For the field curvature & distortion curve graph of Example 4, the field curvature curves of each wavelength coincide, and the field curvature values are all less than 0.06 mm. Figure 16 For the Lateral Color curve graph of Example 4, the correction of the lens magnification chromatic aberration is less than 4 μm.

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

[0125] Table 9 Parameters Table of Example 5

[0126]

[0127]

[0128] Table 10 Aspherical Parameter Table of Example 5

[0129]

[0130]

[0131] Figure 18 For the MTF curve of Example 5, the MTF of the full field of view is greater than 0.38 at 156 lp / mm. Figure 19 For the field curvature & distortion curve of Example 5, the field curvature curves of each wavelength coincide, and the field curvature values are all less than 0.06 mm. Figure 20 For the Lateral Color curve of Example 5, the chromatic aberration correction of the lens magnification is less than 4 μm.

[0132] Based on Examples 1 to 5, the present case has the following specific advantages: The effective diameter of the lens and the system size are optimized. By limiting the effective diameter of the lens to less than φ26 mm, the present 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 requirements of drones for miniaturization and lightweight. The focal length F is less than 10 mm, and combined with a horizontal field of view (HFOV) of up to 85°, the present invention achieves large-angle imaging, capable of covering a wider area, especially suitable for applications such as aerial photography and monitoring. The total weight of the lens is less than 32 g. Through the hybrid glass-plastic design, the number of glass lenses used is reduced, and at the same time, by utilizing the lightweight characteristics of plastic lenses, the weight of the lens is significantly reduced, improving the endurance and mobility of the drone. MTF performance: At a frequency of 156 lp / mm, the modulation transfer function (MTF) values of the full field of view are all greater than 0.38, ensuring high imaging resolution and image clarity. Target plane height matching: The target plane height is greater than or equal to 16.384 mm, capable of matching a large target plane sensor of 1 / 0.98 inches, ensuring that the imaging plane covers the entire sensor, improving the integrity and quality of imaging. Chief ray angle (CRA): The chief ray angle (CRA) of the imaging plane is 12°, matching the sensor, optimizing the light incident angle, reducing the deflection of light on the sensor, and improving the imaging uniformity and color reproduction. The aperture F / NO is 1.4. The large aperture design significantly increases the light input of the system, improving the imaging effect in low-light environments, and at the same time enhancing the depth of field control ability, further improving the imaging quality.

[0133] Through the above design, the present invention has achieved significant technological progress in the following aspects:

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

[0135] System miniaturization and lightweight: By optimizing the lens material and structure design, the number and size of the lenses are reduced, effectively shortening the total length of the optical system, and at the same time reducing the weight of the lens, meeting the development trend of miniaturization and lightweight of drone lenses.

[0136] Cost reduction: The combination of glass-plastic hybrid design and rational matching of high Abbe number and low Abbe number materials reduces the dependence on expensive optical materials, improves production efficiency and yield rate, and lowers the overall production cost.

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

[0138] In summary, by precisely defining the refractive index and dispersion coefficient of each lens, and combining aspherical design and material optimization, the present invention solves the technical problems of chromatic aberration correction, imaging quality optimization, and miniaturization in existing UAV lenses, and has remarkable innovation and practicality.

[0139] Example 6

[0140] Reference is now made Figure 21 , and a description of electronic device A according to Example 6 of the present invention will be given. Figure 21 is a schematic diagram of an electronic device (UAV camera) that uses any one of the large-format high-resolution UAV lenses according to Examples 1 to 5 in a camera optical system.

[0141] In Figure 21 , reference numeral A2 denotes the electronic device body, and reference numeral A1 denotes a camera optical system (interchangeable lens) including any one of the large-format high-resolution UAV lenses according to Examples 1 to 6. Reference numeral A3 denotes 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 the large-format high-resolution UAV lens according to any one of Examples 1 to 6 in an electronic device such as a digital still camera, an electronic device with high optical performance can be obtained.

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

[0144] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present 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 target surface high-resolution UAV lens, characterized in that, From the object side to the image side, there are 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 in sequence; The first lens has a negative refractive power. The object side surface of this lens is convex, and the image side surface of this lens is concave; The second lens has a negative refractive power. The object side surface of this lens is concave, and the image side surface of this lens is concave; The third lens has a positive refractive power. The object side surface of this lens is convex, and the image side surface of this lens is convex; The fourth lens has a positive refractive power. The object side surface of this lens is convex, and the image side surface of this lens is convex; The fifth lens has a negative refractive power. The object side surface of this lens is concave, and the image side surface of this lens is concave; The sixth lens has a positive refractive power. The object side surface of this lens is convex, and the image side surface of this lens is convex; The seventh lens has a negative refractive power. The object side surface of this lens is convex, and the image side surface of this lens is concave; The eighth lens has a positive refractive power. The object side surface of this lens is convex, and the image side surface of this lens is convex; The ninth lens has a positive refractive power. The object side surface of this lens is convex, and the image side surface of this lens 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.

2. A large target surface high-resolution UAV lens according to claim 1, characterized in that, A diaphragm is provided between the third lens and the fourth lens, and the third lens is made of a glass aspherical lens with a high refractive index material.

3. A large target surface high-resolution UAV lens according to claim 2, characterized in that, The lens satisfies the following conditional formula: nd3>1.8 In the formula, nd3 is the refractive index of the third lens.

4. A large target surface high-resolution UAV lens according to claim 1, characterized in that, The fourth lens, the fifth lens, and the sixth lens form a three-glued lens.

5. A large target surface high-resolution UAV lens according to claim 4, characterized in that, The lens satisfies the following conditional formula: |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.

6. A large target surface high-resolution UAV lens according to 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, and the third lens is a glass aspherical lens; the seventh lens, the eighth lens, and the ninth lens are plastic aspherical lenses.

7. A large target surface high-resolution UAV lens according to claim 1, characterized in that, The lens satisfies the following conditional formula: 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; Wherein, f is the focal length of the lens, and f1, f2, f3, f4, f5, f6, f7, f8, 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.

8. A large target surface high-resolution UAV lens according to claim 1, wherein the lens satisfies the following conditional formula: 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; Wherein, nd1 to nd9 are the refractive indices 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, and vd1 to vd9 are the dispersion coefficients 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.

9. An electronic device, characterized in that, A large target surface high-resolution UAV lens according to any one of claims 1-8; and an image sensor configured to receive an image formed by the large target surface high-resolution UAV lens.

Images