Optical lens and electronic device

Abstract

The present disclosure belongs to the technical field of optics, and particularly relates to an optical lens and an electronic device. The optical lens comprises, in order 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, a ninth lens, a tenth lens and an eleventh lens. The first lens has positive refractive power. The second lens has negative refractive power. The third lens has negative refractive power. The fourth lens has positive refractive power. The fifth lens has positive refractive power. The sixth lens has positive refractive power. The seventh lens has negative refractive power. The eighth lens has positive refractive power. The ninth lens has positive refractive power. The tenth lens has positive refractive power. The eleventh lens has negative refractive power. The distortion curve of the optical lens changes monotonically in the full field of view. Compared with a non-monotonic distortion curve, a monotonic distortion curve is easier to be fitted with high precision, which helps to improve the detection precision.

Description

Technical Field

[0001] This disclosure relates to the field of optical technology, and in particular to an optical lens and electronic device. Background Technology

[0002] With the rapid development of image processing and computer technology, machine vision technology has been widely integrated into various fields such as industrial automation, intelligent manufacturing, and quality inspection. In this technological system, the lens, as a core optical component, directly affects image quality and recognition accuracy.

[0003] To meet the ever-evolving demands of precision manufacturing and intelligent inspection, optical lenses are gradually developing towards larger field of view, better resolution, higher stability, and smaller size. However, lenses with larger field of view suffer from issues such as low accuracy in 3D reconstruction fitting, resulting in poor lens precision. Summary of the Invention

[0004] This disclosure provides an optical lens and electronic device with high accuracy in three-dimensional reconstruction fitting.

[0005] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0006] The first aspect of this disclosure provides an optical lens, comprising:

[0007] An aperture stop and a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens arranged coaxially from the object side to the image side; the aperture stop is disposed between the fifth lens and the sixth lens;

[0008] The first lens has positive optical power; the second lens has negative optical power; the third lens has negative optical power; the fourth lens has positive optical power; the fifth lens has positive optical power; the sixth lens has positive optical power; the seventh lens has negative optical power; the eighth lens has positive optical power; the ninth lens has positive optical power; the tenth lens has positive optical power; and the eleventh lens has negative optical power.

[0009] The distortion curve of the optical lens exhibits a monotonic variation across the entire field of view.

[0010] Compared with the prior art, the optical lens provided by the first aspect of this disclosure has the following advantages:

[0011] The optical lens disclosed herein includes a first lens with positive optical power. The primary function of the first lens is to provide significant negative distortion to compensate for the large amount of positive distortion generated by other lenses. The second lens has negative optical power. Its primary function is to collect large-angle off-axis beams and bring them into the lens, thereby miniaturizing the optical path structure. The third and fourth lenses primarily function to deflect the light beam angle, working together with a fifth lens with positive optical power to ensure smooth light entry into the aperture. The sixth lens has positive optical power, and its primary function, along with the seventh and eighth lenses, is to smooth the path of light emitted from the aperture and to correct chromatic aberration to some extent. The ninth lens has positive optical power, and its primary function, along with the tenth and eleventh lenses, is to distribute optical power so that each lens possesses a certain converging capacity, and to significantly correct chromatic aberration through different glass combinations. This reduces the degree of light refraction after passing through the lenses, thereby reducing system tolerance sensitivity and converging light onto the image plane. The distortion curve of an optical lens exhibits a monotonic variation across the entire field of view. Compared to a non-monotonic distortion curve, a monotonic distortion curve is easier to fit with high precision, which helps improve detection accuracy.

[0012] As an improvement to the optical lens described above in this disclosure, the third lens and the fourth lens are cemented lenses and have positive optical power;

[0013] The seventh lens and the eighth lens are cemented lenses and have positive optical power;

[0014] The tenth and eleventh lenses are cemented lenses and have positive optical power.

[0015] As an improvement to the optical lens described above in this disclosure, the first lens is a convex-concave lens; the second lens is a convex-concave lens; the third lens is a biconcave lens; the fourth lens is a biconvex lens; the fifth lens is a convex-concave lens or a convex-concave lens; the sixth lens is a concave-convex lens; the seventh lens is a concave-convex lens; the eighth lens is a concave-convex lens; the ninth lens is a plano-convex lens or a concave-convex lens; the tenth lens is a biconvex lens; and the eleventh lens is a concave-convex lens.

[0016] As an improvement to the optical lens disclosed herein, the radius of curvature R11 of the incident surface of the first lens is 13.8 mm to 21.8 mm, and the radius of curvature R12 of the exit surface is 54.5 mm to 87.1 mm; the radius of curvature R21 of the incident surface of the second lens is 8.9 mm to 17.3 mm, and the radius of curvature R22 of the exit surface is 2.8 mm to 4.8 mm; the radius of curvature R31 of the incident surface of the third lens is -15.7 mm to -4.8 mm, and the radius of curvature R22 of the exit surface is 2.8 mm to 4.8 mm. The radius of curvature R32 of the fourth lens is 6.1mm to 10.7mm; the radius of curvature R41 of the incident surface of the fourth lens is 6.1mm to 10.7mm, and the radius of curvature R42 of the exit surface is -13.1mm to -5.9mm; the radius of curvature R51 of the incident surface of the fifth lens is 8.9mm to 10mm, and the radius of curvature R52 of the exit surface is less than or equal to -30.9mm, or the radius of curvature R52 of the exit surface is greater than or equal to 12.8mm; the radius of curvature R52 of the incident surface of the sixth lens is... The radius of curvature R61 of the seventh lens is -14mm to -4.7mm, and the radius of curvature R62 of the exit surface is -7.3mm to -3.6mm; the radius of curvature R71 of the incident surface of the seventh lens is -4.7mm to -2.7mm, and the radius of curvature R72 of the exit surface is -24.3mm to -13mm; the radius of curvature R81 of the incident surface of the eighth lens is -24.3mm to -13mm, and the radius of curvature R82 of the exit surface is -6.7mm to -3.9mm; the radius of curvature R61 of the incident surface of the ninth lens is -14mm to -4.7mm, and the radius of curvature R62 of the exit surface is -7.3mm to -3.6mm; the radius of curvature R71 of the incident surface of the eighth lens is -24.3mm to -13mm, and the radius of curvature R82 of the exit surface is -6.7mm to -3.9mm; the radius of curvature R61 of the incident surface of the ninth lens is -14mm to -4.7mm, and the radius of curvature R62 of the exit surface is -7.3mm to -3.6mm. The radius of curvature R91 of the incident surface of the lens is less than or equal to -190 mm, and the radius of curvature R92 of the exit surface is -14.6 mm to -9 mm; the radius of curvature R101 of the incident surface of the tenth lens is 8.7 mm to 16 mm, and the radius of curvature R102 of the exit surface is -8.5 mm to -4.2 mm; the radius of curvature R111 of the incident surface of the eleventh lens is -8.5 mm to -4.2 mm, and the radius of curvature R112 of the exit surface is -40 mm to -20.6 mm.

[0017] As an improvement to the optical lens disclosed herein, the first lens has a refractive index N1 of 1.75 and an Abbe number V1 of 52.3; the second lens has a refractive index N2 of 1.73–1.75 and an Abbe number V2 of 52.3–54.7; the third lens has a refractive index N3 of 1.92–1.95 and an Abbe number V3 of 17.9–18.9; the fourth lens has a refractive index N4 of 1.85–2.00 and an Abbe number V4 of 23.8–31.3; the fifth lens has a refractive index N5 of 1.95 and an Abbe number V5 of 17.9; and the sixth lens has a refractive index N1 of 1.75 and an Abbe number V1 of 52.3. The refractive index N6 is 1.88, and the Abbe number V6 is 39.2; the refractive index N7 of the seventh lens is 1.69–1.76, and the Abbe number V7 is 26.6–31.2; the refractive index N8 of the eighth lens is 1.73–1.88, and the Abbe number V8 is 39.2–54.7; the refractive index N9 of the ninth lens is 1.75, and the Abbe number V9 is 52.3; the refractive index N10 of the tenth lens is 1.5, and the Abbe number V10 is 81.6; the refractive index N11 of the eleventh lens is 1.81–1.85, and the Abbe number V11 is 23.8–25.5.

[0018] As an improvement to the optical lens disclosed herein, the center thickness GT1 of the first lens is 0.9 mm to 1.8 mm; the center thickness GT2 of the second lens is 0.5 mm to 1.9 mm; the center thickness GT3 of the third lens is 0.5 mm to 1.0 mm; the center thickness GT4 of the fourth lens is 1.1 mm to 2.6 mm; the center thickness GT5 of the fifth lens is 0.7 mm to 2.6 mm; the center thickness GT6 of the sixth lens is 0.6 mm to 1.0 mm; the center thickness GT7 of the seventh lens is 0.6 mm to 1.0 mm; the center thickness GT8 of the eighth lens is 0.9 mm to 1.6 mm; the center thickness GT9 of the ninth lens is 0.7 mm to 1.5 mm; the center thickness GT10 of the tenth lens is 1.7 mm to 3.0 mm; and the center thickness GT11 of the eleventh lens is 0.5 mm to 1.0 mm.

[0019] As an improvement to the optical lens disclosed herein, the air gap distance AT1 between the first lens and the second lens along the optical axis is 0.1 mm; the air gap distance AT2 between the second lens and the third lens along the optical axis is 2.2 mm to 3.6 mm; the air gap distance AT3 between the fourth lens and the fifth lens along the optical axis is 0.1 mm to 0.8 mm; the air gap distance AT4 between the fifth lens and the aperture stop along the optical axis is 1 mm to 1.6 mm; and the air gap distance A between the aperture stop and the sixth lens along the optical axis is... T5 is 0.7mm to 0.8mm; the air gap AT6 between the sixth and seventh lenses along the optical axis is 0.5mm to 1.6mm; the air gap AT7 between the eighth and ninth lenses along the optical axis is 0.1mm to 0.2mm; the air gap AT8 between the ninth and tenth lenses along the optical axis is 0.1mm to 0.2mm; the tenth and eleventh lenses are cemented lenses; the air gap BFL between the eleventh lens and the image plane along the optical axis is 4mm to 8mm.

[0020] As an improvement to the optical lens disclosed herein, the focal length f1 of the first lens is 24.2 mm to 42.8 mm; the focal length f2 of the second lens is -5.6 mm to -9.6 mm; the focal length f3 of the third lens is -16.6 mm to -3.4 mm; the focal length f4 of the fourth lens is 4.3 mm to 5.9 mm; the focal length f5 of the fifth lens is 7.3 mm to 27.8 mm; the focal length f6 of the sixth lens is 13.4 mm to 15.9 mm; the focal length f7 of the seventh lens is -6.6 mm to -4.9 mm; the focal length f8 of the eighth lens is 7 mm to 13.2 mm; the focal length f9 of the ninth lens is 11.9 mm to 20.9 mm; the focal length f10 of the tenth lens is 6 mm to 32.2 mm; and the focal length f11 of the eleventh lens is -13.5 mm to -6.3 mm.

[0021] As an improvement to the optical lens described above in this disclosure, the first lens and the second lens form a first lens group; the third lens, the fourth lens, and the fifth lens form a second lens group; the sixth lens, the seventh lens, and the eighth lens form a third lens group; and the ninth lens, the tenth lens, and the eleventh lens form a fourth lens group.

[0022] As an improvement to the optical lens disclosed herein, the focal length fa of the first lens group is -13.8mm to -8mm, the focal length fb of the second lens group is 7mm to 20mm, the focal length fc of the third lens group is 26.7mm to 33mm, and the focal length fd of the fourth lens group is 9.5mm to 15.6mm.

[0023] As an improvement to the optical lens described above, the axial distance d12 between the first lens group and the second lens group is 2.2 mm to 3.6 mm, the axial distance d23 between the second lens group and the third lens group is 1.8 mm to 2.3 mm, and the axial distance d34 between the third lens group and the fourth lens group is 0.1 mm.

[0024] As an improvement to the optical lens described above, the focal length fa of the first lens group satisfies |fa / f| = 1.8 to 2.1 with respect to the effective focal length f of the optical lens; the focal length fb of the second lens group satisfies fb / f = 1.8 to 2.8 with respect to the effective focal length f of the optical lens; the focal length fc of the third lens group satisfies fc / f = 3.7 to 7.6 with respect to the effective focal length f of the optical lens; and the focal length fd of the fourth lens group satisfies fd / f = 2.1 to 2.5 with respect to the effective focal length f of the optical lens.

[0025] As an improvement to the optical lens disclosed herein, the optical lens has an effective focal length f of 3.8 mm to 7.2 mm, an aperture number Fno of F / 1.7 to F / 9, an image-side target size IMG of 6 mm to 10.5 mm, an operating wavelength of 390 nm to 700 nm, a total system optical length TTL of 18 mm to 35 mm, and a system back focal length BFL of 4 mm to 8 mm.

[0026] As an improvement to the optical lens described in this disclosure, the distortion of the optical lens is less than 6%.

[0027] As an improvement to the optical lens described above, the contrast of the MTF of each field of view of the optical lens at a spatial frequency of 110 cycles / mm is greater than 0.3;

[0028] The relative illumination of the optical lens across the entire field of view is greater than 85%.

[0029] As an improvement to the optical lens described above, all lenses are made of glass and all lenses are spherical lenses.

[0030] A second aspect of this disclosure provides an electronic device that includes the optical lens described in the first aspect.

[0031] The electronic device provided in the second aspect of this disclosure, since it includes the optical lens described in the first aspect, also has the same advantages as the optical lens described in the first aspect.

[0032] In addition to the technical problems solved by this disclosure, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by the optical lenses and electronic devices provided by this disclosure, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments of this disclosure or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only a part of the embodiments of this disclosure. These drawings and text descriptions are not intended to limit the scope of the concept of this disclosure in any way, but to illustrate the concept of this disclosure to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of an optical lens provided in an embodiment of this disclosure;

[0035] Figure 2 This is a distortion diagram of an optical lens in related technologies;

[0036] Figure 3 A distortion diagram of an optical lens provided in an embodiment of this disclosure;

[0037] Figure 4 MTF curve of the optical lens provided in the embodiments of this disclosure;

[0038] Figure 5 A relative illumination curve of an optical lens provided in an embodiment of this disclosure. Detailed Implementation

[0039] With the rapid development of image processing and computer technology, machine vision technology has been widely integrated into various fields such as industrial automation, intelligent manufacturing, and quality inspection. The high precision, rapid response, and stable reliability of machine vision technology enable it to play a crucial role in improving production efficiency and reducing labor costs. In this technological system, the lens, as a core optical component, directly affects image quality and recognition accuracy.

[0040] As industrial lenses are increasingly used in applications such as inspection, measurement, and identification, they are gradually developing towards larger field of view, higher resolution, higher stability, and smaller size to meet the ever-evolving needs of precision manufacturing and intelligent inspection.

[0041] In related technologies, lenses often force edge vignetting to increase the field of view, resulting in lower uniformity of image illumination. Simultaneously, to reduce lens optical distortion, the distortion curve is compressed, making it non-monotonic and thus reducing the fitting accuracy during 3D reconstruction.

[0042] Increasing the complexity of the lens structure to achieve certain lens characteristics leads to higher assembly costs and lower lens stability, resulting in actual image performance of the finished lens being far lower than the design performance. Furthermore, using aspherical lenses to achieve certain performance targets results in excessively high manufacturing costs for aspherical glass lenses, and the complexity of surface shape control leads to insufficient mass production feasibility. Aspherical plastic lenses also suffer from large temperature drift and rapid aging, failing to meet the demands of changing application environments.

[0043] In view of this, the present disclosure provides a compact, high-precision wide-angle lens that can improve relative illumination and its uniformity while maintaining a wide field of view; simultaneously, it reduces the fitting error of 3D reconstruction based on the monotonic distortion curve. The lens of the present disclosure uses global surface glass material, ensuring low cost and stability.

[0044] The optical lens of this disclosure satisfies the requirement of clear imaging over a wide field of view, and simultaneously possesses the characteristics of high resolution, high uniformity, monotonic distortion, and low cost.

[0045] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0046] Example 1

[0047] This disclosure provides an optical lens, which includes: an aperture stop and a plurality of lenses with optical power arranged coaxially from the object side to the image side; the aperture stop has a plurality of lenses on the object side side and a plurality of lenses on the image side side.

[0048] The distortion curve of an optical lens exhibits a monotonic variation across the entire field of view. Compared to a non-monotonic distortion curve, a monotonic distortion curve is easier to fit with high precision, which helps improve detection accuracy.

[0049] Figure 1 This is a schematic diagram of the structure of an optical lens provided in an embodiment of this disclosure.

[0050] Combination Figure 1The optical lens of this embodiment includes a first lens G1, a second lens G2, a third lens G3, a fourth lens G4, a fifth lens G5, a sixth lens G6, a seventh lens G7, an eighth lens G8, a ninth lens G9, a tenth lens G10, and an eleventh lens G11 arranged coaxially from the object side to the image side; the aperture stop ST is disposed between the fifth lens G5 and the sixth lens G6.

[0051] like Figure 1 As shown, a cover glass 12 is provided on the rear side of the eleventh lens G11 and between the image plane 10.

[0052] The first lens G1 has positive optical power; the second lens G2 has negative optical power; the third lens G3 has negative optical power; the fourth lens G4 has positive optical power; the fifth lens G5 is adjacent to the aperture stop ST and is located on the object side of the aperture stop ST; the sixth lens G6 is adjacent to the aperture stop ST and is located on the image side of the aperture stop ST; the seventh lens G7 has negative optical power; the eighth lens G8 has positive optical power; the ninth lens G9 has positive optical power; the tenth lens G10 has positive optical power; and the eleventh lens G11 has negative optical power.

[0053] The first lens G1 has positive optical power. The main function of the first lens G1 is to provide a large negative distortion to compensate for the large amount of positive distortion produced by other lenses.

[0054] The second lens G2 has negative optical power. The main function of the second lens G2 is to collect large-angle off-axis beams and bring them into the lens, thereby achieving miniaturization of the optical path structure.

[0055] The third lens G3 and the fourth lens G4 are cemented lenses with positive optical power; their main function is to deflect the angle of light rays, and together with the fifth lens G5, which also has positive optical power, they enable light rays to smoothly enter the aperture.

[0056] The sixth lens G6 has positive optical power, while the seventh lens G7 and the eighth lens G8 are cemented lenses and also have positive optical power; their main function is to smooth the path of light emitted from the aperture and to correct chromatic aberration to a certain extent.

[0057] The ninth lens G9 has positive optical power, while the tenth and eleventh lenses G10 and G11 are cemented lenses and also have positive optical power. Their main function is to distribute optical power so that each lens has a certain converging ability, and to correct chromatic aberration to a great extent through different glass combinations. This reduces the degree of light refraction after passing through the lens, thereby reducing the system's tolerance sensitivity and converging the light onto the image plane.

[0058] Lenses can be made of colorless optical glass or optical plastic. Optical plastics are low-cost for mass production, easy to process into aspherical surfaces, and lightweight. Optical glass has stable mechanical and thermal properties, and chromatic aberration can be eliminated and image quality improved by combining different refractive indices and Abbe numbers. Industrial robots are used in diverse environments, requiring high environmental temperature stability.

[0059] In some embodiments, all lenses are made of glass, and all lenses are spherical lenses. Firstly, glass has higher transmittance and better image quality compared to plastic. Secondly, glass has far superior physical and chemical stability compared to plastic, making it better suited to various environments and resulting in a longer lifespan. Furthermore, spherical glass lenses are significantly less expensive than aspherical glass lenses.

[0060] In some embodiments of this disclosure, the optical lens includes a first lens group L1, a second lens group L2, a third lens group L3, and a fourth lens group L4 arranged sequentially along the optical path from the object plane to the image plane, which helps to optimize and adjust various parameters of the optical lens.

[0061] Each of the four lens groups consists of at least one lens, and may include split lenses and cemented lenses. They can be all spherical lenses, all aspherical lenses, or a combination of spherical and aspherical lenses.

[0062] In some embodiments, the first lens G1 and the second lens G2 form a first lens group L1; the third lens G3, the fourth lens G4 and the fifth lens G5 form a second lens group L2; the sixth lens G6, the seventh lens G7 and the eighth lens G8 form a third lens group L3; and the ninth lens G9, the tenth lens G10 and the eleventh lens G11 form a fourth lens group L4.

[0063] The focal length fa of the first lens group L1 is -13.8mm to -8mm, the focal length fb of the second lens group L2 is 7mm to 20mm, the focal length fc of the third lens group L3 is 26.7mm to 33mm, and the focal length fd of the fourth lens group L4 is 9.5mm to 15.6mm.

[0064] The axial distance d12 between the first lens group L1 and the second lens group L2 is 2.2mm to 3.6mm, the axial distance d23 between the second lens group L2 and the third lens group L3 is 1.8mm to 2.3mm, and the axial distance d34 between the third lens group L3 and the fourth lens group L4 is 0.1mm.

[0065] The focal length fa of the first lens group L1 satisfies |fa / f| = 1.8 to 2.1 with the effective focal length f of the optical lens; the focal length fb of the second lens group L2 satisfies fb / f = 1.8 to 2.8 with the effective focal length f of the optical lens; the focal length fc of the third lens group L3 satisfies fc / f = 3.7 to 7.6 with the effective focal length f of the optical lens; and the focal length fd of the fourth lens group L4 satisfies fd / f = 2.1 to 2.5 with the effective focal length f of the optical lens.

[0066] The effective focal length of the optical lens is 3.8mm to 7.2mm, the aperture number is F / 1.7 to F / 9, the image sensor size (IMG) is 6mm to 10.5mm, the working wavelength is 390nm to 700nm, the total optical length (TTL) of the optical lens system is 18mm to 35mm, and the back focal length (BFL) of the system is 4mm to 8mm.

[0067] In some embodiments, the first lens G1 is a convex-concave lens; the second lens G2 is a convex-concave lens; the third lens G3 is a biconcave lens; the fourth lens G4 is a biconvex lens; the fifth lens G5 is a convex-concave lens or a convex-concave lens; the sixth lens G6 is a concave-convex lens; the seventh lens is a concave-convex lens; the eighth lens is a concave-convex lens; the ninth lens G9 is a plano-convex lens or a concave-convex lens; the tenth lens G10 is a biconvex lens; and the eleventh lens G11 is a concave-convex lens; wherein the third lens G3 and the fourth lens G4 are cemented lenses; the sixth lens G6 and the seventh lens G7 are cemented lenses; and the tenth lens G10 and the eleventh lens G11 are cemented lenses.

[0068] Combination Figure 1 The optical lens of the present disclosure has a simple structure and good lens manufacturability while ensuring the size and volume of the lens optical path.

[0069] In some embodiments, the radius of curvature R11 of the incident surface of the first lens G1 is 13.8 mm to 21.8 mm, and the radius of curvature R12 of the exit surface is 54.5 mm to 87.1 mm; the radius of curvature R21 of the incident surface of the second lens G2 is 8.9 mm to 17.3 mm, and the radius of curvature R22 of the exit surface is 2.8 mm to 4.8 mm; the radius of curvature R31 of the incident surface of the third lens G3 is -15.7 mm to -4.8 mm, and the radius of curvature R32 of the exit surface is... The radius of curvature of the incident surface of the fourth lens G4 is 6.1mm to 10.7mm, and the radius of curvature of the exit surface R42 is -13.1mm to -5.9mm; the radius of curvature of the incident surface of the fifth lens G5 is 8.9mm to 10mm, and the radius of curvature of the exit surface R52 is less than or equal to -30.9mm, or the radius of curvature of the exit surface R52 is greater than or equal to 12.8mm; the radius of curvature of the incident surface of the sixth lens G6 is R... Lens 61 has an incident surface radius of -14mm to -4.7mm, and an exit surface radius of curvature R62 of -7.3mm to -3.6mm; the seventh lens G7 has an incident surface radius of curvature R71 of -4.7mm to -2.7mm, and an exit surface radius of curvature R72 of -24.3mm to -13mm; the eighth lens G8 has an incident surface radius of curvature R81 of -24.3mm to -13mm, and an exit surface radius of curvature R82 of -6.7mm to -3.9mm; the ninth lens G9 has an incident surface radius of -14mm to -4.7mm, and an exit surface radius of curvature R72 of -7.3mm to -3.6mm; the ninth lens G9 has an incident surface radius of -14mm to -4.7mm, and an exit surface radius of curvature R72 of -7.3mm to -3.6mm. The radius of curvature R91 of the incident surface is less than or equal to -190mm, and the radius of curvature R92 of the exit surface is -14.6mm to -9mm; the radius of curvature R101 of the incident surface of the tenth lens G10 is 8.7mm to 16mm, and the radius of curvature R102 of the exit surface is -8.5mm to -4.2mm; the radius of curvature R111 of the incident surface of the eleventh lens G11 is -8.5mm to -4.2mm, and the radius of curvature R112 of the exit surface is -40mm to -20.6mm.

[0070] Among them, combined with the appendix Figure 1 The incident surface of a lens is the surface of the lens facing the object; the exit surface of a lens is the surface of the lens facing the image.

[0071] In some embodiments, the first lens G1 has a refractive index N1 of 1.75 and an Abbe number V1 of 52.3; the second lens G2 has a refractive index N2 of 1.73–1.75 and an Abbe number V2 of 52.3–54.7; the third lens G3 has a refractive index N3 of 1.92–1.95 and an Abbe number V3 of 17.9–18.9; the fourth lens G4 has a refractive index N4 of 1.85–2.00 and an Abbe number V4 of 23.8–31.3; the fifth lens G5 has a refractive index N5 of 1.95 and an Abbe number V5 of 17.9; and the sixth lens G6 has a refractive index N6 of… The refractive index of the seventh lens G7 is 1.69–1.76, and the Abbe number V7 is 26.6–31.2; the refractive index of the eighth lens G8 is 1.73–1.88, and the Abbe number V8 is 39.2–54.7; the refractive index of the ninth lens G9 is 1.75, and the Abbe number V9 is 52.3; the refractive index of the tenth lens G10 is 1.5, and the Abbe number V10 is 81.6; the refractive index of the eleventh lens G11 is 1.81–1.85, and the Abbe number V11 is 23.8–25.5. This embodiment of the present disclosure defines the material properties of each lens by limiting the refractive index and Abbe number of each lens.

[0072] In some embodiments, the center thickness GT1 of the first lens G1 is 0.9 mm to 1.8 mm; the center thickness GT2 of the second lens G2 is 0.5 mm to 1.9 mm; the center thickness GT3 of the third lens G3 is 0.5 mm to 1.0 mm; the center thickness GT4 of the fourth lens G4 is 1.1 mm to 2.6 mm; the center thickness GT5 of the fifth lens G5 is 0.7 mm to 2.6 mm; the center thickness GT6 of the sixth lens G6 is 0.6 mm to 1.0 mm; the center thickness GT7 of the seventh lens G7 is 0.6 mm to 1.0 mm; the center thickness GT8 of the eighth lens G8 is 0.9 mm to 1.6 mm; the center thickness GT9 of the ninth lens G9 is 0.7 mm to 1.5 mm; the center thickness GT10 of the tenth lens G10 is 1.7 mm to 3.0 mm; and the center thickness GT11 of the eleventh lens G11 is 0.5 mm to 1.0 mm. Here, the center thickness of the lens refers to the thickness of the lens at its center along the optical axis.

[0073] In some embodiments, the air gap AT1 between the first lens G1 and the second lens G2 along the optical axis is 0.1 mm; the air gap AT2 between the second lens G2 and the third lens G3 along the optical axis is 2.2 mm to 3.6 mm; the air gap AT3 between the fourth lens G4 and the fifth lens G5 along the optical axis is 0.1 mm to 0.8 mm; the air gap AT4 between the fifth lens G5 and the aperture stop ST along the optical axis is 1 mm to 1.6 mm; and the air gap AT5 between the aperture stop ST and the sixth lens G6 along the optical axis is 0 mm. 0.7mm~0.8mm; the air gap AT6 between the sixth lens G6 and the seventh lens G7 along the optical axis is 0.5mm~1.6mm; the air gap AT7 between the eighth lens G8 and the ninth lens G9 along the optical axis is 0.1mm~0.2mm; the air gap AT8 between the ninth lens G9 and the tenth lens G10 along the optical axis is 0.1mm~0.2mm; the tenth lens G10 and the eleventh lens G11 are cemented lenses; the air gap BFL between the eleventh lens G11 and the image plane along the optical axis is 4mm~8mm.

[0074] Among them, the air gap distance AT3 between the fourth lens G4 and the aperture stop ST along the optical axis and the air gap distance AT4 between the aperture stop ST and the fifth lens G5 along the optical axis satisfy AT3+AT4=1.8mm~2.3mm.

[0075] In some embodiments, the focal length f1 of the first lens G1 is 24.2 mm to 42.8 mm; the focal length f2 of the second lens G2 is -5.6 mm to -9.6 mm; the focal length f3 of the third lens G3 is -16.6 mm to -3.4 mm; the focal length f4 of the fourth lens G4 is 4.3 mm to 5.9 mm; the focal length f5 of the fifth lens G5 is 7.3 mm to 27.8 mm; the focal length f6 of the sixth lens G6 is 13.4 mm to 15.9 mm; the focal length f7 of the seventh lens G7 is -6.6 mm to -4.9 mm; the focal length f8 of the eighth lens G8 is 7 mm to 13.2 mm; the focal length f9 of the ninth lens G9 is 11.9 mm to 20.9 mm; the focal length f10 of the tenth lens G10 is 6 mm to 32.2 mm; and the focal length f11 of the eleventh lens G11 is -13.5 mm to -6.3 mm.

[0076] The parameters of each lens in this embodiment can be calculated using optical design software or ray tracing algorithms, but this disclosure does not limit the design tools or design process.

[0077] In this disclosure, each lens or lens group of the optical lens has its own unique functional focus. Through reasonable allocation of optical power and material matching, various aberrations are balanced and kept within a range that does not affect accuracy.

[0078] The following is combined Figures 2 to 5 The performance of the optical lens according to embodiments of this disclosure is explained. Among them, Figure 2 This is a distortion diagram of an optical lens in related technologies; Figure 3 A distortion diagram of an optical lens provided in an embodiment of this disclosure; Figure 4 MTF curve of the optical lens provided in the embodiments of this disclosure; Figure 5 A relative illumination curve of an optical lens provided in an embodiment of this disclosure.

[0079] exist Figure 2 and Figure 3 In the distortion diagram, the vertical axis represents the field of view, and the horizontal axis represents the distortion value. Each curve represents the distortion value at different wavelengths within the working band.

[0080] exist Figure 2 In the distortion diagram shown, from the central field of view of 0° to the edge field of view of 37.5°, the distortion first increases from 0 to about 0.7, and then decreases to about 0.1. The distortion curve shows a curve that bulges to the left.

[0081] Combination Figure 3 The optical distortion curve of the optical lens in this embodiment is monotonic across the entire field of view. From the center field of view (0°) to the edge field of view (37.7°), the distortion gradually increases from 0 to 6%, exhibiting a monotonic change. Compared to a non-monotonic distortion curve, a monotonic distortion curve simplifies the correction process during 3D reconstruction, allows the algorithm to more accurately compensate for distortion, reduces errors, and facilitates high-precision fitting, enabling the 3D model to more realistically reproduce details.

[0082] In some possible embodiments, the optical lens distortion is less than 6%, resulting in less full-frame image distortion.

[0083] like Figure 4 The MTF (Modulation Transfer Function) curve shown is plotted with spatial frequency on the horizontal axis (linear period / mm) and contrast on the vertical axis (range 0-1). Solid and dashed lines represent the meridional and sagittal components of the MTF at different fields of view. The solid line represents the meridional contrast component, perpendicular to the optical axis; the dashed line represents the sagittal contrast component, along the optical axis. Higher curves and closer together indicate higher image quality. Figure 4 The contrast ratio of the MTF in each field of view of the optical lens is greater than 0.3 at a spatial frequency of 110 cycles / mm, resulting in high image quality.

[0084] Figure 5The relative illumination curve is shown on the horizontal axis, where the horizontal axis represents the field of view in degrees. 0° represents the central field of view, and 37.7° represents the edge field of view. The vertical axis represents relative illumination, ranging from 0 to 1. The optical lens of this embodiment has a relative illumination of 100% in the central field of view and greater than 85% in the edge field of view. Thus, the total relative illumination of the optical lens of this disclosure is greater than 85%, ensuring the uniformity of the overall image and preventing vignetting even at the edges of the image, with minimal difference between edge and center brightness.

[0085] The optical lens of this embodiment, under the condition of monotonic distortion curve, has a contrast greater than 0.3 at a spatial frequency of 110 cycles / mm for each field of view modulation transfer function, enabling high-resolution imaging, reducing image blur, making the image clearer, and improving image quality. Furthermore, the optical lens of this embodiment has a relative illumination greater than 85% across the entire field of view, reducing vignetting at image edges, making the brightness of the entire field of view more uniform, and reducing the need for post-processing brightness correction.

[0086] Therefore, the optical lens of this embodiment has high resolution and high relative illumination, resulting in high image quality; the monotonic distortion curve is easier to fit with high precision during three-dimensional reconstruction by combining with the algorithm, which can obtain a more realistic and more accurate three-dimensional model to meet the needs of precision measurement and detection.

[0087] Example 1

[0088] In this embodiment of the disclosure, the effective focal length f of the optical lens is 3.8 mm, the aperture number Fno is F / 1.7, the image target size IMG is 6 mm, the working wavelength is 390 nm to 700 nm, the total optical length TTL of the system is 18 mm, and the back focal length BFL of the system is 4 mm.

[0089] The focal length fa of the first lens group L1 is -8mm, the focal length fb of the second lens group L2 is 7mm, the focal length fc of the third lens group L3 is 29mm, and the focal length fd of the fourth lens group L4 is 9.5mm. The axial distance d12 between the first lens group L1 and the second lens group L2 is 2.2mm, the axial distance d23 between the second lens group L2 and the third lens group L3 is 2.1mm, and the axial distance d34 between the third lens group L3 and the fourth lens group L4 is 0.1mm.

[0090] The focal length fa of the first lens group L1 of the lens satisfies |fa / f|=2.1 with the effective focal length f of the lens; the focal length fb of the second lens group L2 satisfies fb / f=1.8 with the effective focal length f of the lens; the focal length fc of the third lens group L3 satisfies fc / f=7.6 with the effective focal length f of the lens; and the focal length fd of the fourth lens group L4 satisfies fd / f=2.5 with the effective focal length f of the lens.

[0091] The surface shapes of each lens in the lens group are as follows: the first lens G1 is a convex-concave lens, the second lens G2 is a convex-concave lens, the third lens G3 is a biconcave lens, the fourth lens G4 is a biconvex lens, the third lens G3 and the fourth lens G4 are cemented lenses, the fifth lens G5 is a biconvex lens, the sixth lens G6 is a concave-convex lens, the seventh lens G7 is a concave-convex lens, the eighth lens G8 is a concave-convex lens, the ninth lens G9 is a plano-convex lens, the tenth lens G10 is a biconvex lens, and the eleventh lens G11 is a concave-convex lens.

[0092] The radii of curvature of each lens are as follows: For the first lens G1, the radius of curvature R11 of the incident surface is 13.8 mm, and the radius of curvature R12 of the exit surface is 54.5 mm; for the second lens G2, the radius of curvature R21 of the incident surface is 8.9 mm, and the radius of curvature R22 of the exit surface is 2.8 mm; for the third lens G3, the radius of curvature R31 of the incident surface is -4.8 mm, and the radius of curvature R32 of the exit surface is 10.7 mm; for the fourth lens G4, the radius of curvature R41 of the incident surface is 10.7 mm, and the radius of curvature R42 of the exit surface is -5.9 mm; for the fifth lens G5, the radius of curvature R51 of the incident surface is 8.9 mm, and the radius of curvature R52 of the exit surface is -30.9 mm; for the sixth lens G6, the radius of curvature R6 of the incident surface is... The radius of curvature of the incident surface of lens G7 is -4.7mm, and the radius of curvature of the exit surface is -3.6mm; the radius of curvature of the incident surface of lens G7 is -2.7mm, and the radius of curvature of the exit surface is -13mm; the radius of curvature of the incident surface of lens G8 is -13mm, and the radius of curvature of the exit surface is -3.9mm; the radius of curvature of the incident surface of lens G9 is infinite, and the radius of curvature of the exit surface is -9mm; the radius of curvature of the incident surface of lens G10 is 8.7mm, and the radius of curvature of the exit surface is -4.2mm; the radius of curvature of the incident surface of lens G11 is -4.2mm, and the radius of curvature of the exit surface is -20.6mm.

[0093] The center thicknesses of each lens are as follows: the center thickness GT1 of the first lens G1 is 0.9 mm; the center thickness GT2 of the second lens G2 is 0.5 mm; the center thickness GT3 of the third lens G3 is 0.5 mm; the center thickness GT4 of the fourth lens G4 is 1.1 mm; the center thickness GT5 of the fifth lens G5 is 0.7 mm; the center thickness GT6 of the sixth lens G6 is 0.6 mm; the center thickness GT7 of the seventh lens G7 is 0.6 mm; the center thickness GT8 of the eighth lens G8 is 0.9 mm; the center thickness GT9 of the ninth lens G9 is 0.7 mm; the center thickness GT10 of the tenth lens G10 is 1.7 mm; and the center thickness GT11 of the eleventh lens G11 is 0.5 mm.

[0094] The air gaps between the lenses are as follows: the air gap AT1 between the first lens G1 and the second lens G2 along the optical axis is 0.1 mm; the air gap AT2 between the second lens G2 and the third lens G3 along the optical axis is 2.2 mm; the third lens G3 and the fourth lens G4 are cemented lenses; the air gap AT3 between the fourth lens G4 and the fifth lens G5 along the optical axis is 0.1 mm; the air gap AT4 between the fifth lens G5 and the aperture stop ST along the optical axis is 1.3 mm; the air gap between the aperture stop ST and the sixth lens G6 along the optical axis is... The air gap AT5 is 0.8 mm; the air gap AT6 between the sixth lens G6 and the seventh lens G7 along the optical axis is 0.5 mm; the seventh lens G7 and the eighth lens G8 are cemented lenses; the air gap AT7 between the eighth lens G8 and the ninth lens G9 along the optical axis is 0.1 mm; the air gap AT8 between the ninth lens G9 and the tenth lens G10 along the optical axis is 0.1 mm; the tenth lens G10 and the eleventh lens G11 are cemented lenses; the air gap BFL between the eleventh lens G11 and the image plane along the optical axis is 4 mm.

[0095] The air gap AT3 between the fourth lens G4 and the aperture stop ST along the optical axis satisfies AT3 + AT4 = 2.1 mm with the air gap AT4 between the aperture stop ST and the fifth lens G5 along the optical axis.

[0096] The focal lengths of the lenses are as follows: the focal length f1 of the first lens G1 is 24.2mm; the focal length f2 of the second lens G2 is -5.6mm; the focal length f3 of the third lens G3 is -3.4mm; the focal length f4 of the fourth lens G4 is 4.3mm; the focal length f5 of the fifth lens G5 is 7.3mm; the focal length f6 of the sixth lens G6 is 13.4mm; the focal length f7 of the seventh lens G7 is -4.9mm; the focal length f8 of the eighth lens G8 is 7mm; the focal length f9 of the ninth lens G9 is 11.9mm; the focal length f10 of the tenth lens G10 is 6mm; and the focal length f11 of the eleventh lens G11 is -6.3mm.

[0097] The optical material parameters of each lens are as follows: Lens G1 has a refractive index N1 of 1.75 and an Abbe number V1 of 52.3; Lens G2 has a refractive index N2 of 1.75 and an Abbe number V2 of 52.3; Lens G3 has a refractive index N3 of 1.95 and an Abbe number V3 of 17.9; Lens G4 has a refractive index N4 of 1.90 and an Abbe number V4 of 31.3; Lens G5 has a refractive index N5 of 1.95 and an Abbe number V5 of 17.9; Lens G6 has a refractive index... The refractive index of the seventh lens G7 is 1.88, and the Abbe number V6 is 39.2; the refractive index of the eighth lens G8 is 1.69, and the Abbe number V7 is 31.2; the refractive index of the ninth lens G9 is 1.75, and the Abbe number V8 is 52.3; the refractive index of the tenth lens G10 is 1.5, and the Abbe number V10 is 81.6; the refractive index of the eleventh lens G11 is 1.85, and the Abbe number V11 is 23.8.

[0098] Example 2

[0099] In this embodiment of the disclosure, the effective focal length f of the optical lens is 5.5mm, the aperture number Fno is F / 2.8, the image target size IMG is 8mm, the working wavelength is 390nm~700nm, the total optical length TTL of the system is 26.5mm, and the back focal length BFL of the system is 6mm.

[0100] The focal length fa of the first lens group L1 is -10mm, the focal length fb of the second lens group L2 is 12mm, the focal length fc of the third lens group L3 is 33mm, and the focal length fd of the fourth lens group L4 is 11.5mm. The axial distance d12 between the first lens group L1 and the second lens group L2 is 2.6mm, the axial distance d23 between the second lens group L2 and the third lens group L3 is 2.3mm, and the axial distance d34 between the third lens group L3 and the fourth lens group L4 is 0.1mm.

[0101] The focal length fa of the first lens group L1 of the lens satisfies |fa / f|=1.8 with the effective focal length f of the lens; the focal length fb of the second lens group L2 satisfies fb / f=2.2 with the effective focal length f of the lens; the focal length fc of the third lens group L3 satisfies fc / f=6 with the effective focal length f of the lens; and the focal length fd of the fourth lens group L4 satisfies fd / f=2.1 with the effective focal length f of the lens.

[0102] The surface shapes of each lens in the lens group are as follows: the first lens G1 is a convex-concave lens, the second lens G2 is a convex-concave lens, the third lens G3 is a biconcave lens, the fourth lens G4 is a biconvex lens, the third lens G3 and the fourth lens G4 are cemented lenses, the fifth lens G5 is a biconvex lens, the sixth lens G6 is a concave-convex lens, the seventh lens G7 is a concave-convex lens, the eighth lens G8 is a concave-convex lens, the ninth lens G9 is a plano-convex lens, the tenth lens G10 is a biconvex lens, and the eleventh lens G11 is a concave-convex lens.

[0103] The radii of curvature of each lens are as follows: For the first lens G1, the radius of curvature R11 of the incident surface is 21.1 mm, and the radius of curvature R12 of the exit surface is 87.1 mm; for the second lens G2, the radius of curvature R21 of the incident surface is 13.1 mm, and the radius of curvature R22 of the exit surface is 3.8 mm; for the third lens G3, the radius of curvature R31 of the incident surface is -15.7 mm, and the radius of curvature R32 of the exit surface is 10.1 mm; for the fourth lens G4, the radius of curvature R41 of the incident surface is 10.1 mm, and the radius of curvature R42 of the exit surface is -13.1 mm; for the fifth lens G5, the radius of curvature R51 of the incident surface is 10 mm, and the radius of curvature R52 of the exit surface is 20 mm; for the sixth lens G6, the radius of curvature R61 of the incident surface is 10 mm, 10 mm, 2 ... The radius of curvature of the incident surface of the seventh lens G7 is -8mm, and the radius of curvature of the exit surface R62 is -5.3mm; the radius of curvature of the incident surface of the eighth lens G8 is -24.3mm, and the radius of curvature of the exit surface R82 is -6.7mm; the radius of curvature of the incident surface of the ninth lens G9 is infinite, and the radius of curvature of the exit surface R92 is -11mm; the radius of curvature of the incident surface of the tenth lens G10 is 12.1mm, and the radius of curvature of the exit surface R102 is -6.2mm; the radius of curvature of the incident surface of the eleventh lens G11 is -6.2mm, and the radius of curvature of the exit surface R112 is -33.9mm.

[0104] The center thicknesses of each lens are as follows: the center thickness GT1 of the first lens G1 is 1.6mm; the center thickness GT2 of the second lens G2 is 0.9mm; the center thickness GT3 of the third lens G3 is 0.8mm; the center thickness GT4 of the fourth lens G4 is 1.8mm; the center thickness GT5 of the fifth lens G5 is 1mm; the center thickness GT6 of the sixth lens G6 is 1mm; the center thickness GT7 of the seventh lens G7 is 0.8mm; the center thickness GT8 of the eighth lens G8 is 1.5mm; the center thickness GT9 of the ninth lens G9 is 1.5mm; the center thickness GT10 of the tenth lens G10 is 3mm; and the center thickness GT11 of the eleventh lens G11 is 0.8mm.

[0105] The air gaps between the lenses are as follows: the air gap AT1 between the first lens G1 and the second lens G2 along the optical axis is 0.1 mm; the air gap AT2 between the second lens G2 and the third lens G3 along the optical axis is 2.6 mm; the third lens G3 and the fourth lens G4 are cemented lenses; the air gap AT3 between the fourth lens G4 and the fifth lens G5 along the optical axis is 0.1 mm; the air gap AT4 between the fifth lens G5 and the aperture stop ST along the optical axis is 1.6 mm; the air gap between the aperture stop ST and the sixth lens G6 along the optical axis is... The air gap AT5 is 0.7 mm; the air gap AT6 between the sixth lens G6 and the seventh lens G7 along the optical axis is 0.7 mm; the seventh lens G7 and the eighth lens G8 are cemented lenses; the air gap AT7 between the eighth lens G8 and the ninth lens G9 along the optical axis is 0.1 mm; the air gap AT8 between the ninth lens G9 and the tenth lens G10 along the optical axis is 0.1 mm; the tenth lens G10 and the eleventh lens G11 are cemented lenses; the air gap BFL between the eleventh lens G11 and the image plane along the optical axis is 6 mm.

[0106] The air gap AT3 between the fourth lens G4 and the aperture stop ST along the optical axis and the air gap AT4 between the aperture stop ST and the fifth lens G5 along the optical axis satisfy AT3+AT4=2.3mm.

[0107] The focal lengths of the lenses are as follows: the focal length f1 of the first lens G1 is 36.4 mm; the focal length f2 of the second lens G2 is -7.4 mm; the focal length f3 of the third lens G3 is -16.4 mm; the focal length f4 of the fourth lens G4 is 5.9 mm; the focal length f5 of the fifth lens G5 is 20 mm; the focal length f6 of the sixth lens G6 is 14.9 mm; the focal length f7 of the seventh lens G7 is -5.4 mm; the focal length f8 of the eighth lens G8 is 10 mm; the focal length f9 of the ninth lens G9 is 14.5 mm; the focal length f10 of the tenth lens G10 is 24.3 mm; and the focal length f11 of the eleventh lens G11 is -9.4 mm.

[0108] The optical material parameters of each lens are as follows: Lens G1 has a refractive index N1 of 1.75 and an Abbe number V1 of 52.3; Lens G2 has a refractive index N2 of 1.75 and an Abbe number V2 of 52.3; Lens G3 has a refractive index N3 of 1.95 and an Abbe number V3 of 17.9; Lens G4 has a refractive index N4 of 2.00 and an Abbe number V4 of 31.3; Lens G5 has a refractive index N5 of 1.95 and an Abbe number V5 of 17.9; Lens G6 has a refractive index... The refractive index of the seventh lens G7 is 1.88, and the Abbe number V6 is 39.2; the refractive index of the eighth lens G8 is 1.76, and the Abbe number V7 is 26.6; the refractive index of the ninth lens G9 is 1.75, and the Abbe number V9 is 52.3; the refractive index of the tenth lens G10 is 1.5, and the Abbe number V10 is 81.6; the refractive index of the eleventh lens G11 is 1.81, and the Abbe number V11 is 25.5.

[0109] Example 3

[0110] In this embodiment of the disclosure, the effective focal length f of the optical lens is 7.2mm, the aperture number Fno is F / 9, the image target size IMG is 10.5mm, the working wavelength is 390nm~700nm, the total optical length TTL of the system is 35mm, and the back focal length BFL of the system is 8mm.

[0111] The focal length fa of the first lens group L1 is -13.8mm, the focal length fb of the second lens group L2 is 20mm, the focal length fc of the third lens group L3 is 26.7mm, and the focal length fd of the fourth lens group L4 is 15.6mm. The axial distance d12 between the first lens group L1 and the second lens group L2 is 3.6mm, the axial distance d23 between the second lens group L2 and the third lens group L3 is 1.8mm, and the axial distance d34 between the third lens group L3 and the fourth lens group L4 is 0.1mm.

[0112] The focal length fa of the first lens group L1 of the lens satisfies |fa / f|=1.9 with the effective focal length f of the lens; the focal length fb of the second lens group L2 satisfies fb / f=2.8 with the effective focal length f of the lens; the focal length fc of the third lens group L3 satisfies fc / f=3.7 with the effective focal length f of the lens; and the focal length fd of the fourth lens group L4 satisfies fd / f=2.2 with the effective focal length f of the lens.

[0113] The surface shapes of each lens in the lens group are as follows: the first lens G1 is a convex-concave lens, the second lens G2 is a convex-concave lens, the third lens G3 is a biconcave lens, the fourth lens G4 is a biconvex lens, the third lens G3 and the fourth lens G4 are cemented lenses, the fifth lens G5 is a convex-concave lens, the sixth lens G6 is a concave-convex lens, the seventh lens G7 is a concave-convex lens, the eighth lens G8 is a concave-convex lens, the ninth lens G9 is a concave-convex lens, the tenth lens G10 is a biconvex lens, and the eleventh lens G11 is a concave-convex lens.

[0114] The radii of curvature of each lens are as follows: For the first lens G1, the radius of curvature R11 of the incident surface is 21.8 mm, and the radius of curvature R12 of the exit surface is 64.3 mm; for the second lens G2, the radius of curvature R21 of the incident surface is 17.3 mm, and the radius of curvature R22 of the exit surface is 4.8 mm; for the third lens G3, the radius of curvature R31 of the incident surface is -15.5 mm, and the radius of curvature R32 of the exit surface is 6.1 mm; for the fourth lens G4, the radius of curvature R41 of the incident surface is 6.1 mm, and the radius of curvature R42 of the exit surface is -11.8 mm; for the fifth lens G5, the radius of curvature R51 of the incident surface is 9.5 mm, and the radius of curvature R52 of the exit surface is 12.8 mm; for the sixth lens G6, the radius of curvature R61 of the incident surface is - The seventh lens G7 has an incident surface radius of curvature R71 of -4.7mm and an exit surface radius of curvature R72 of -18.3mm; the eighth lens G8 has an incident surface radius of curvature R81 of -18.3mm and an exit surface radius of curvature R82 of -6.6mm; the ninth lens G9 has an incident surface radius of curvature R91 of -190mm and an exit surface radius of curvature R92 of -14.6mm; the tenth lens G10 has an incident surface radius of curvature R101 of 16mm and an exit surface radius of curvature R102 of -8.5mm; the eleventh lens G11 has an incident surface radius of curvature R111 of -8.5mm and an exit surface radius of curvature R112 of -40mm.

[0115] The center thicknesses of each lens are as follows: the center thickness GT1 of the first lens G1 is 1.8mm; the center thickness GT2 of the second lens G2 is 1.9mm; the center thickness GT3 of the third lens G3 is 1mm; the center thickness GT4 of the fourth lens G4 is 2.6mm; the center thickness GT5 of the fifth lens G5 is 2.6mm; the center thickness GT6 of the sixth lens G6 is 1mm; the center thickness GT7 of the seventh lens G7 is 1mm; the center thickness GT8 of the eighth lens G8 is 1.6mm; the center thickness GT9 of the ninth lens G9 is 1.3mm; the center thickness GT10 of the tenth lens G10 is 2.7mm; and the center thickness GT11 of the eleventh lens G11 is 1mm.

[0116] The air gaps between the lenses are as follows: the air gap AT1 between the first lens G1 and the second lens G2 along the optical axis is 0.1 mm; the air gap AT2 between the second lens G2 and the third lens G3 along the optical axis is 3.6 mm; the third lens G3 and the fourth lens G4 are cemented lenses; the air gap AT3 between the fourth lens G4 and the fifth lens G5 along the optical axis is 0.8 mm; the air gap AT4 between the fifth lens G5 and the aperture stop ST along the optical axis is 1 mm; the air gap between the aperture stop ST and the sixth lens G6 along the optical axis is... The air gap AT5 is 0.8 mm; the air gap AT6 between the sixth lens G6 and the seventh lens G7 along the optical axis is 1.6 mm; the seventh lens G7 and the eighth lens G8 are cemented lenses; the air gap AT7 between the eighth lens G8 and the ninth lens G9 along the optical axis is 0.2 mm; the air gap AT8 between the ninth lens G9 and the tenth lens G10 along the optical axis is 0.2 mm; the tenth lens G10 and the eleventh lens G11 are cemented lenses; the air gap BFL between the eleventh lens G11 and the image plane along the optical axis is 8 mm.

[0117] The air gap AT3 between the fourth lens G4 and the aperture stop ST along the optical axis and the air gap AT4 between the aperture stop ST and the fifth lens G5 along the optical axis satisfy AT3+AT4=1.8mm.

[0118] The focal lengths of the lenses are as follows: the focal length f1 of the first lens G1 is 42.8 mm; the focal length f2 of the second lens G2 is -9.6 mm; the focal length f3 of the third lens G3 is -16.6 mm; the focal length f4 of the fourth lens G4 is 5.1 mm; the focal length f5 of the fifth lens G5 is 27.8 mm; the focal length f6 of the sixth lens G6 is 15.9 mm; the focal length f7 of the seventh lens G7 is -6.6 mm; the focal length f8 of the eighth lens G8 is 13.2 mm; the focal length f9 of the ninth lens G9 is 20.9 mm; the focal length f10 of the tenth lens G10 is 32.2 mm; and the focal length f11 of the eleventh lens G11 is -13.5 mm.

[0119] The optical material parameters of each lens are as follows: Lens G1 has a refractive index N1 of 1.75 and an Abbe number V1 of 52.3; Lens G2 has a refractive index N2 of 1.73 and an Abbe number V2 of 54.7; Lens G3 has a refractive index N3 of 1.92 and an Abbe number V3 of 18.9; Lens G4 has a refractive index N4 of 1.85 and an Abbe number V4 of 23.8; Lens G5 has a refractive index N5 of 1.95 and an Abbe number V5 of 17.9; Lens G6 has a refractive index... The refractive index of the seventh lens G7 is 1.88, and the Abbe number V6 is 39.2; the refractive index of the eighth lens G8 is 1.7, and the Abbe number V7 is 30.1; the refractive index of the ninth lens G9 is 1.75, and the Abbe number V9 is 52.3; the refractive index of the tenth lens G10 is 1.5, and the Abbe number V10 is 81.6; the refractive index of the eleventh lens G11 is 1.81, and the Abbe number V11 is 25.5.

[0120] Example 2

[0121] This disclosure also provides an electronic device that includes the optical lens described in the above embodiments. The structure, function, and effects of the optical lens provided in this embodiment are the same as those in the above embodiments, and specific details can be found in the above embodiments, which will not be repeated here.

[0122] In some embodiments of this disclosure, the electronic device is a camera. The camera may be a monocular camera, a binocular camera, or a 3D camera, etc.

[0123] In the above description, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. An optical lens, characterized in that, include: An aperture stop and a lens assembly, wherein the lens assembly consists of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens arranged coaxially from the object side to the image side; the aperture stop is disposed between the fifth lens and the sixth lens; The first lens has positive optical power; the second lens has negative optical power; the third lens has negative optical power; the fourth lens has positive optical power; and the fifth lens has positive optical power. The sixth lens has positive optical power; the seventh lens has negative optical power. The eighth lens has positive optical power; the ninth lens has positive optical power; The tenth lens has positive optical power; the eleventh lens has negative optical power; The distortion curve of the optical lens exhibits a monotonic variation across the entire field of view; The third and fourth lenses are cemented lenses and have positive optical power; The seventh lens and the eighth lens are cemented lenses and have positive optical power; The tenth and eleventh lenses are cemented lenses and have positive optical power.

2. The optical lens according to claim 1, characterized in that, The first lens is a convex-concave lens; the second lens is a convex-concave lens; the third lens is a biconcave lens; the fourth lens is a biconvex lens; the fifth lens is a convex-concave lens or a biconvex lens; the sixth lens is a concave-convex lens; the seventh lens is a concave-convex lens; the eighth lens is a concave-convex lens; the ninth lens is a plano-convex lens or a concave-convex lens; the tenth lens is a biconvex lens; and the eleventh lens is a concave-convex lens.

3. The optical lens according to claim 2, characterized in that, The first lens has an incident surface radius of curvature R11 of 13.8 mm to 21.8 mm and an exit surface radius of curvature R12 of 54.5 mm to 87.1 mm; the second lens has an incident surface radius of curvature R21 of 8.9 mm to 17.3 mm and an exit surface radius of curvature R22 of 2.8 mm to 4.8 mm; the third lens has an incident surface radius of curvature R31 of -15.7 mm to -4.8 mm and an exit surface radius of curvature R32 of 6.1 mm. ~10.7mm; the radius of curvature R41 of the incident surface of the fourth lens is 6.1mm~10.7mm, and the radius of curvature R42 of the exit surface is -13.1mm~-5.9mm; the radius of curvature R51 of the incident surface of the fifth lens is 8.9mm~10mm, and the radius of curvature R52 of the exit surface is less than or equal to -30.9mm, or the radius of curvature R52 of the exit surface is greater than or equal to 12.8mm; the radius of curvature R61 of the incident surface of the sixth lens is... The seventh lens has an incident surface radius of curvature R71 of -14mm to -4.7mm and an exit surface radius of curvature R72 of -7.3mm to -3.6mm; the eighth lens has an incident surface radius of curvature R81 of -24.3mm to -13mm and an exit surface radius of curvature R82 of -6.7mm to -3.9mm; the ninth lens has an incident surface radius of curvature R62 of -7.3mm to -3.9mm. The radius of curvature R91 of the incident surface is less than or equal to -190mm, and the radius of curvature R92 of the exit surface is -14.6mm to -9mm; the radius of curvature R101 of the incident surface of the tenth lens is 8.7mm to 16mm, and the radius of curvature R102 of the exit surface is -8.5mm to -4.2mm; the radius of curvature R111 of the incident surface of the eleventh lens is -8.5mm to -4.2mm, and the radius of curvature R112 of the exit surface is -40mm to -20.6mm.

4. The optical lens according to claim 2, characterized in that, The first lens has a refractive index N1 of 1.75 and an Abbe number V1 of 52.3; the second lens has a refractive index N2 of 1.73~1.75 and an Abbe number V2 of 52.3~54.7; the third lens has a refractive index N3 of 1.92~1.95 and an Abbe number V3 of 17.9~18.9; the fourth lens has a refractive index N4 of 1.85~2.00 and an Abbe number V4 of 23.8~31.3; the fifth lens has a refractive index N5 of 1.95 and an Abbe number V5 of 17.9; and the sixth lens has a refractive index N6 of 1.

8.

8. The Abbe number V6 is 39.2; the refractive index N7 of the seventh lens is 1.69~1.76, and the Abbe number V7 is 26.6~31.2; the refractive index N8 of the eighth lens is 1.73~1.88, and the Abbe number V8 is 39.2~54.7; the refractive index N9 of the ninth lens is 1.75, and the Abbe number V9 is 52.3; the refractive index N10 of the tenth lens is 1.5, and the Abbe number V10 is 81.6; the refractive index N11 of the eleventh lens is 1.81~1.85, and the Abbe number V11 is 23.8~25.

5.

5. The optical lens according to any one of claims 1-4, characterized in that, The optical lens has an effective focal length f of 3.8mm to 7.2mm, an aperture number Fno of F / 1.7 to F / 9, an image target size IMG of 6mm to 10.5mm, an operating wavelength of 390nm to 700nm, a total optical length TTL of 18mm to 35mm, and a back focal length BFL of 4mm to 8mm.

6. The optical lens according to any one of claims 1-4, characterized in that, The distortion of the optical lens is less than 6%.

7. The optical lens according to any one of claims 1-4, characterized in that, The contrast of the MTF of each field of view of the optical lens is greater than 0.3 at a spatial frequency of 110 cycles / mm; The relative illumination of the optical lens across the entire field of view is greater than 85%.

8. The optical lens according to any one of claims 1-4, characterized in that, All lenses are made of glass, and all lenses are spherical lenses.

9. An electronic device, characterized in that, The electronic device includes the optical lens according to any one of claims 1-8.

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