super wide-angle lens

Abstract

The present application relates to a kind of super wide-angle lenses, in the direction of optical axis from object side to image side, in turn include: the first lens of negative refractive power, the second lens of negative refractive power, the third lens of negative refractive power, the fourth lens of positive refractive power, the fifth lens, the sixth lens of positive refractive power, the seventh lens of positive refractive power, the eighth lens of negative refractive power and the ninth lens of positive refractive power, the optical total length TTL of super wide-angle lens, total focal length f and the image height H under maximum field angle satisfy the following relationship: 6.9≤TTL*f / H≤7.4.The super wide-angle lens of the present application at least has one of the following characteristics: large field FOV≥196 ° optical total length is short and thermal stability is good, high resolution, can be realized larger aperture (FNO≤1.8), high illumination, etc..

Description

Technical Field

[0001] This invention relates to the field of imaging lens technology, and in particular to an ultra-wide-angle lens that has one of the following characteristics: large field of view, large aperture, high resolution, high illumination, and low cost. Background Technology

[0002] With the development of optical imaging lenses, the demand for lenses is constantly increasing in fields such as panoramic surveillance, drones, action cameras, and automotive lenses, thus placing higher requirements on optical imaging lenses. Specifically:

[0003] 1. To obtain a wider target range, a large field of view is required for optical imaging lenses;

[0004] 2. In order to obtain more light transmission, a large aperture is required for optical imaging lenses;

[0005] 3. Existing lenses have the drawback of not being able to achieve high resolution while maintaining high brightness, thus requiring optical imaging lenses to have both high resolution and high illumination.

[0006] 4. Existing lenses use materials with stable coefficients of thermal expansion to ensure good thermal stability, resulting in high costs and poor market competitiveness. Therefore, there is a demand for low-cost optical imaging lenses.

[0007] Therefore, designing an ultra-wide-angle lens with one of the following characteristics—large field of view, large aperture, high resolution, high illumination, and low cost—has become a market trend. Summary of the Invention

[0008] To address the problems existing in the prior art, the present invention aims to provide an ultra-wide-angle lens that has at least one of the following characteristics: a large field of view (FOV) ≥ 196°, short total optical length, good thermal stability, high resolution, the ability to achieve a large aperture (FNO ≤ 1.8), and high illumination.

[0009] To achieve the aforementioned objectives, this invention provides an ultra-wide-angle lens, comprising, in sequence along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens, a sixth lens with positive optical power, a seventh lens with positive optical power, an eighth lens with negative optical power, and a ninth lens with positive optical power.

[0010] The total optical length TTL, total focal length f, and image height H at the maximum field of view of the ultra-wide-angle lens satisfy the following relationship: 6.9≤TTL*f / H≤7.4.

[0011] According to one technical solution of the present invention, a tenth lens is further located on the object side of the first lens, the tenth lens having negative optical power.

[0012] According to one technical solution of the present invention, the tenth lens is a convex-concave lens.

[0013] According to one technical solution of the present invention, the effective optical aperture D10 of the tenth lens and the effective focal length f10 of the tenth lens satisfy the following relationship: -0.3≤D10 / f10<0.

[0014] According to one technical solution of the present invention, the first lens is a convex-concave lens, the second lens is a convex-concave lens, and the object-side surface of the third lens is concave.

[0015] According to one technical solution of the present invention, the object-side surface of the sixth lens is convex, the seventh lens is a convex-convex lens, the object-side surface of the eighth lens is concave, and the object-side surface of the ninth lens is convex.

[0016] According to one technical solution of the present invention, the third lens is cemented to the fourth lens, or the fourth lens is cemented to the fifth lens.

[0017] According to one technical solution of the present invention, the seventh lens and the eighth lens form a cemented lens.

[0018] According to one technical solution of the present invention, the effective focal length f1 of the first lens and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: -6.3≤f1 / f≤-4.

[0019] According to one technical solution of the present invention, the effective focal length f12 of the combination of the first lens and the second lens and the effective focal length f of the ultra-wide-angle lens satisfy the following relationship: -1.8≤f12 / f≤-1.6.

[0020] According to one technical solution of the present invention, the effective focal length f2 of the second lens and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: -4≤f2 / f≤-2.6.

[0021] According to one technical solution of the present invention, the effective focal length f2 of the second lens and the radius of curvature R22 of the image side surface of the second lens satisfy the following relationship: -2.9≤f2 / R22≤-1.6.

[0022] According to one technical solution of the present invention, the effective focal length f3 of the third lens and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: -6.7≤f3 / f≤-3.8.

[0023] According to one technical solution of the present invention, the effective focal length f4 of the fourth lens and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: 2.1≤f4 / f≤7.

[0024] According to one technical solution of the present invention, the effective focal length f6 of the sixth lens and the effective focal length f5 of the fifth lens satisfy the following relationship: 0 < |f6 / f5| ≤ 1.2.

[0025] According to one technical solution of the present invention, the effective focal length f6 of the sixth lens and the effective focal length fb of the rear lens group satisfy the following relationship: 1.35≤f6 / fb≤3.

[0026] According to one technical solution of the present invention, the effective focal length f7 of the seventh lens and the effective focal length f8 of the eighth lens satisfy the following relationship: -1.67≤f7 / f8≤-0.8.

[0027] According to one technical solution of the present invention, the effective focal length f9 of the ninth lens and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: 2.7≤f9 / f≤5.

[0028] According to one technical solution of the present invention, the radius of curvature R92 of the image side surface of the ninth lens and the effective focal length f9 of the ninth lens satisfy the following relationship: 0.8≤|R92 / f9|≤2.5.

[0029] According to one technical solution of the present invention, the effective focal length fa of the front lens group and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: -5.6≤fa / f≤-3.4.

[0030] According to one technical solution of the present invention, the effective focal length fb of the rear lens group and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: 2.8≤fb / f≤3.2.

[0031] According to one technical solution of the present invention, the effective focal length fa of the front lens group and the effective focal length fb of the rear lens group satisfy the following relationship: -1.75≤fa / fb≤-1.2.

[0032] According to one technical solution of the present invention, the maximum field of view (FOV), the image height (H) at the maximum field of view, and the maximum aperture (D) of the ultra-wide-angle lens satisfy the following relationship: 3.4 ≤ FOV / H / D ≤ 3.75.

[0033] According to one technical solution of the present invention, the combined effective focal length f345 of the third lens to the fifth lens and the effective focal length fa of the front lens group satisfy the following relationship: -3≤f345 / fa≤-1.3.

[0034] According to one technical solution of the present invention, the back focal length BFL of the ultra-wide-angle lens and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: 1.3≤BFL / f≤1.5.

[0035] According to one technical solution of the present invention, the Abbe number Vd4 of the fourth lens and the Abbe number Vd5 of the fifth lens satisfy the following relationship: 1≤|Vd4-Vd5|≤15;

[0036] The Abbe number Vd7 of the seventh lens and the Abbe number Vd8 of the eighth lens satisfy the following relationship: 40≤|Vd7-Vd8|≤67.

[0037] According to one technical solution of the present invention, the image height H corresponding to the maximum field of view of the ultra-wide-angle lens is 4.5mm to 4.7mm.

[0038] According to one technical solution of the present invention, the ultra-wide-angle lens satisfies at least one of the following conditions:

[0039] -6.3≤f1 / f≤-4.2,

[0040] -3.9≤f² / f≤-2.8,

[0041] -1.75≤f12 / f≤-1.6,

[0042] -2.8≤f² / R²²≤-1.8,

[0043] -6.4≤f3 / f≤-4,

[0044] 2.15≤f4 / f≤6.8

[0045] 0.25≤|f6 / f5|≤1.05,

[0046] 1.4≤f6 / fb≤2.85,

[0047] -1.6≤f7 / f8≤-0.9,

[0048] 2.85≤f9 / f≤4.85

[0049] 0.9≤|R92 / f9|≤2.1,

[0050] -5.4≤fa / f≤-3.75,

[0051] 2.8 ≤ fb / f ≤ 3.2

[0052] -1.7≤fa / fb≤-1.25,

[0053] -3≤f345 / fa≤-1.3,

[0054] 3.4≤FOV / H / D≤3.7

[0055] 1.3≤BFL / f≤1.45

[0056] 6.95≤TTL*F / H≤7.4

[0057] 1≤|Vd4-Vd5|≤14,

[0058] 43.5≤|Vd7-Vd8|≤64.5,

[0059] Wherein, f1 is the effective focal length of the first lens; f is the total focal length of the ultra-wide-angle lens; f2 is the effective focal length of the second lens; f12 is the combined effective focal length of the first lens and the second lens; R22 is the radius of curvature of the image side surface of the second lens; f3 is the effective focal length of the third lens; f4 is the effective focal length of the fourth lens; f6 is the effective focal length of the sixth lens; f5 is the effective focal length of the fifth lens; fb is the effective focal length of the rear lens group; f7 is the effective focal length of the seventh lens; f8 is the effective focal length of the eighth lens; f9 is the effective focal length of the ninth lens; R92 is... The image-side radius of curvature of the ninth lens; fa is the effective focal length of the front lens group; f345 is the combined effective focal length of the third to fifth lenses; FOV is the maximum field of view of the ultra-wide-angle lens; H is the image height at the maximum field of view of the ultra-wide-angle lens; D is the maximum aperture of the ultra-wide-angle lens; TTL is the total optical length of the ultra-wide-angle lens; BFL is the back focal length of the ultra-wide-angle lens; Vd4 is the Abbe number of the fourth lens; Vd5 is the Abbe number of the fifth lens; Vd7 is the Abbe number of the seventh lens; Vd8 is the Abbe number of the eighth lens.

[0060] According to one technical solution of the present invention, the effective optical aperture D10 of the tenth lens and the effective focal length f10 of the tenth lens satisfy: -0.3≤D10 / F10≤-0.1.

[0061] According to the present invention, by setting the relationship between the number of ultra-wide-angle lenses and their optical power, the ultra-wide-angle lens can have at least one of the following characteristics: short total optical length and good thermal stability, large field of view (FOV) ≥ 196°, high resolution (25 million pixels) when paired with a camera, large aperture (FNO ≤ 1.8), and high illumination (relative illumination ≥ 63%). Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0063] Figure 1 This is a schematic diagram of the structure of the ultra-wide-angle lens in Embodiment 1 of the present invention;

[0064] Figure 2 This is a schematic diagram of the structure of the ultra-wide-angle lens in Embodiment 2 of the present invention;

[0065] Figure 3 This is a schematic diagram of the structure of the ultra-wide-angle lens in Embodiment 3 of the present invention;

[0066] Figure 4 This is a schematic diagram of the structure of the ultra-wide-angle lens in Embodiment 4 of the present invention. Detailed Implementation

[0067] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0068] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the first lens.

[0069] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0070] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0071] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0072] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0073] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. The following embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.

[0074] like Figures 1 to 4 As shown, an embodiment of the present invention provides an ultra-wide-angle lens, which, along the optical axis from the object side to the image side, sequentially includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a protective flat glass CG. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 form the front lens group, and the sixth lens L6, the seventh lens L7, the eighth lens L8, and the ninth lens L9 form the rear lens group.

[0075] The first lens L1 is a convex-concave lens with negative optical power, which can effectively converge light rays with a large field of view, reduce the incident angle of light on the object side of the second lens L2, effectively avoid subsequent optical lenses from producing advanced aberrations due to excessive incident angle, and improve the resolving performance of the lens.

[0076] The second lens L2 is a convex-concave lens with negative optical power, which helps to control the direction of light, make the light transition smoothly, and better correct aberrations in the central field of view, thereby improving the lens's resolving power.

[0077] The third lens L3 has negative optical power and its object side is concave. The fourth lens L4 has positive optical power and is preferably a glass lens. The cooperation between the negative optical power third lens L3 and the positive optical power fourth lens L4 helps to better correct spherical aberration of the optical system and improve the lens's resolving performance. The cooperation between the fourth lens L4 and the fifth lens L5 helps to better correct spherical aberration of the optical system, effectively corrects axial chromatic aberration, and also effectively reduces the tolerance sensitivity of the lenses, improving the lens's production yield.

[0078] The fifth lens L5 is preferably a glass lens, and the object-side surface of the sixth lens L6 is convex and has positive optical power. Through the cooperation of the fifth lens L5 and the sixth lens L6, axial chromatic aberration can be effectively corrected, and the path of light before and after the aperture can be controlled, allowing for a larger aperture (FNO ≤ 1.8) and effectively improving illumination. The sixth lens L6 can be a spherical or aspherical lens. When the sixth lens L6 is an aspherical lens, it is beneficial for correcting residual astigmatism and axial chromatic aberration in the front group; when the sixth lens L6 is a spherical lens, it is preferable to use a material with stable thermal expansion to facilitate thermal compensation of the optical lens.

[0079] The aperture stop STO is located between the fifth lens L5 and the sixth lens L6. By setting an aperture stop between the fifth lens L5 and the sixth lens L6 to limit the light beam, the imaging quality of the optical lens can be further improved, which is beneficial to gather the light entering the optical system, reduce the rear port diameter of the optical system, and reduce the assembly sensitivity of the system.

[0080] The seventh lens, L7, is a convex-convex lens with positive optical power, while the eighth lens, L8, has negative optical power and a concave object-side surface. The combination of the seventh lens L7 and the eighth lens L8 forms a cemented doublet lens, which facilitates smooth light transmission, reduces lens tolerance sensitivity, and effectively improves lens production yield. Simultaneously, the eighth lens L8 effectively corrects transverse chromatic aberration, enhancing image quality. The seventh lens L7 utilizes a low-refractive-index, high-Abbe-number material to effectively correct transverse chromatic aberration in the optical system, thus improving the lens's image quality.

[0081] The ninth lens L9 has positive optical power and its object side is convex, which can effectively control the light path and effectively reduce the exit angle of the light after passing through the ninth lens L9, thereby reducing the angle of the main ray to better match the chip and the chip CRA curve requirements.

[0082] In some embodiments of the present invention, the combined effective focal length f345 of the third lens L3 to the fifth lens L5 and the effective focal length fa of the front lens group satisfy the following relationship: -3 ≤ f345 / fa ≤ -1.3. By reasonably controlling the ratio of the combined effective focal length of the third lens L3 to the fifth lens L5 to the effective focal length of the front lens group of the ultra-wide-angle lens, the trend of light can be effectively controlled, which is beneficial to better correct the spherical aberration of the optical system, and can also effectively correct axial chromatic aberration; it is beneficial to the smooth transition of light, can effectively reduce the tolerance sensitivity of the lens, and improve the production yield of the lens.

[0083] In some embodiments of the present invention, a tenth lens L10 is also included, located on the object side of the first lens L1. The tenth lens L10 is a convex-concave lens with negative optical power, which helps to reduce the incident angle of the incident light on the object side of the first lens L1, so that the light enters the rear optical system smoothly and effectively corrects the aberrations of the rear group of the optical system. Furthermore, the lens material of the tenth lens L10 is glass, which can serve as a protective cover to protect the lens.

[0084] In some embodiments of the present invention, the effective optical aperture D10 and the effective focal length f10 of the tenth lens L10 satisfy the following relationship: -0.3 ≤ D10 / f10 < 0, preferably -0.3 ≤ D10 / f10 ≤ -0.1. A reasonable configuration of the ratio of the effective optical aperture D10 to the effective focal length f10 of the tenth lens L10 facilitates the entry of large-angle incident light into the optical system, effectively expanding the field of view (FOV) of the optical system to ≥ 196°, while also effectively avoiding aberrations.

[0085] In some embodiments of the present invention, the effective focal length f1 of the first lens L1 and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: -6.3 ≤ f1 / f ≤ -4, preferably -6.3 ≤ f1 / f ≤ -4.2. Reasonably controlling the effective focal length f1 of the first lens L1 can effectively collect light rays with a large field of view, reduce the incident angle of light on the object side of the second lens L2, and effectively avoid subsequent optical lenses from generating advanced aberrations due to excessive incident angles, thereby improving the resolving performance of the lens.

[0086] In some embodiments of the present invention, the combined effective focal length f12 of the first lens L1 and the second lens L2 and the effective focal length f of the ultra-wide-angle lens satisfy the following relationship: -1.8 ≤ f12 / f ≤ -1.6, preferably -1.75 ≤ f12 / f ≤ -1.6. A reasonable configuration of the combined effective focal length f12 of the first lens L1 and the second lens L2 can effectively control the direction of light, enabling the light to diverge, which is beneficial for allowing as much large-angle light as possible to enter the rear of the optical system, thereby improving the relative illumination of the lens.

[0087] In some embodiments of the present invention, the effective focal length f2 of the second lens L2 and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: -4≤f2 / f≤-2.6, preferably -3.9≤f2 / f≤-2.8. A reasonable configuration of the effective focal length f2 of the second lens L2 effectively controls the direction of light, enabling the light to diverge, which helps to allow as much large-angle light as possible to enter the rear of the optical system, thereby improving the relative illumination of the lens.

[0088] In some embodiments of the present invention, the effective focal length f2 of the second lens L2 and the radius of curvature R22 of the image-side surface of the second lens L2 satisfy the following relationship: -2.9 ≤ f2 / R22 ≤ -1.6, preferably -2.8 ≤ f2 / R22 ≤ -1.8. A reasonable configuration of the ratio of the effective focal length f2 of the second lens L2 to its radius of curvature R22 of the image-side surface is beneficial for controlling the direction of light rays, allowing the light rays to be incident smoothly onto the object-side surface of the third lens L3. This helps reduce the tolerance sensitivity of the optical lens and also helps to better correct aberrations in the central field of view, thereby improving the lens's resolving power.

[0089] In some embodiments of the present invention, the effective focal length f3 of the third lens L3 and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: -6.7 ≤ f3 / f ≤ -3.8, preferably -6.4 ≤ f3 / f ≤ -4. A reasonable configuration of the effective focal length f3 of the third lens L3 is beneficial for correcting spherical aberration in the optical system and improving the lens's resolving power.

[0090] In some embodiments of the present invention, the effective focal length f4 of the fourth lens L4 and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: 2.1 ≤ f4 / f ≤ 7, preferably 2.15 ≤ f4 / f ≤ 6.8. A reasonable configuration of the effective focal length f4 of the fourth lens L4 is beneficial for correcting spherical aberration and on-axis chromatic aberration in the optical system, thereby improving the lens's resolving power.

[0091] In some embodiments of the present invention, the effective focal length f6 of the sixth lens L6 and the effective focal length f5 of the fifth lens L5 satisfy the following relationship: 0 < |f6 / f5| ≤ 1.2, preferably 0.25 ≤ |f6 / f5| ≤ 1.05. Reasonably allocating the focal lengths of the fifth lens L5 and the sixth lens L6 can effectively correct spherical aberration and on-axis chromatic aberration, improving lens resolution; it can also control the light path before and after the aperture stop, helping to achieve a larger aperture, making the aperture FNO ≤ 1.8, effectively improving illumination; and it can also better achieve the characteristics of temperature drift reduction, helping to achieve thermal compensation of the optical lens, thus giving the optical lens good temperature performance.

[0092] In some embodiments of the present invention, the effective focal length f6 of the sixth lens L6 and the effective focal length fb of the rear lens group satisfy the following relationship: 1.35 ≤ f6 / fb ≤ 3, preferably 1.4 ≤ f6 / fb ≤ 2.85. A reasonable configuration of the ratio of the effective focal length f6 of the sixth lens L6 to the effective focal length fb of the rear lens group of the optical system is beneficial for smooth light transmission, reducing the tolerance sensitivity of the lens, and effectively improving the production yield of the lens.

[0093] In some embodiments of the present invention, the effective focal length f7 of the seventh lens L7 and the effective focal length f8 of the eighth lens L8 satisfy the following relationship: -1.67 ≤ f7 / f8 ≤ -0.8, preferably -1.6 ≤ f7 / f8 ≤ -0.9. A reasonable configuration of the focal length ratio of the seventh lens L7 and the eighth lens L8, using a positive and negative optical power pairing, helps to balance the astigmatism generated by the lens group behind the aperture stop, thereby improving resolving performance.

[0094] In some embodiments of the present invention, the effective focal length f9 of the ninth lens L9 and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: 2.7 ≤ f9 / f ≤ 5, preferably 2.85 ≤ f9 / f ≤ 4.85. Reasonably allocating the effective focal length f9 of the ninth lens L9 can effectively control the light trajectory, deflect the maximum field-of-view principal ray emitted from the eighth lens L8, and ensure better matching of chip requirements.

[0095] In some embodiments of the present invention, the image-side surface curvature radius R92 of the ninth lens L9 and the effective focal length f9 of the ninth lens L9 satisfy the following relationship: 0.8 ≤ |R92 / f9| ≤ 2.5, preferably 0.9 ≤ |R92 / f9| ≤ 2.1. By reasonably controlling the ratio of the image-side surface curvature radius R92 of the ninth lens L9 to its effective focal length f9, the exit angle of light passing through L9 can be effectively reduced, thus decreasing the principal ray angle. This allows for better matching with the chip and the chip's CRA curve requirements, resulting in stronger tolerance and manufacturability of the lens.

[0096] In some embodiments of the present invention, the effective focal length fa of the front lens group and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: -5.6 ≤ fa / f ≤ -3.4, preferably -5.4 ≤ fa / f ≤ -3.75. By rationally setting the effective focal length fa of the front lens group, the principal plane of the overall optical system can be brought closer to the imaging plane, achieving a reverse telephoto effect. This effectively increases the back focal length of the optical lens, which is beneficial for the assembly of the optical lens module. Furthermore, lengthening the back focal length also helps reduce the energy of ghost images generated by reflections from the center of the lens elements and color filters, thus improving lens quality.

[0097] In some embodiments of the present invention, the effective focal length fb of the rear lens group and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: 2.8 ≤ fb / f ≤ 3.2. Properly setting the effective focal length fb of the rear lens group can help achieve a larger aperture, making the aperture FNO ≤ 1.8.

[0098] In some embodiments of the present invention, the effective focal length fa of the front lens group and the effective focal length fb of the rear lens group satisfy the following relationship: -1.75≤fa / fb≤-1.2, preferably -1.7≤fa / fb≤-1.25. Reasonably allocating the effective focal lengths of the front and rear lens groups is beneficial for controlling the overall light path of the optical system, making the light transition smoother, reducing the system's sensitivity, and improving the system's imaging quality.

[0099] In some embodiments of the present invention, the maximum field of view (FOV), image height (H) at the maximum field of view, and maximum aperture (D) of the ultra-wide-angle lens satisfy the following relationship: 3.4 ≤ FOV / H / D ≤ 3.75, preferably 3.4 ≤ FOV / H / D ≤ 3.7. By controlling the ratio range of the maximum field of view (FOV), image height (H) at the maximum field of view, and maximum aperture (D) of the ultra-wide-angle lens, its viewpoint position can be effectively controlled, ensuring that the aperture meets design requirements. When the image height is fixed, the shorter the focal length, the larger the field of view, and vice versa. By controlling the ratio range between the field of view, focal length, and image height, the lens can have a reasonable field of view when corresponding to different sensors.

[0100] In some embodiments of the present invention, the total optical length (TTL), total focal length (f), and image height (H) of the ultra-wide-angle lens satisfy the following relationship: 6.9 ≤ TTL*f / H ≤ 7.4, preferably 6.95 ≤ TTL*f / H ≤ 7.4. By reasonably adjusting the total optical length (TTL), total focal length (f), and image height (H) of the optical lens, it is beneficial to make the entire optical lens more compact and achieve miniaturization.

[0101] In some embodiments of the present invention, the back focal length BFL of the ultra-wide-angle lens and the total focal length f of the ultra-wide-angle lens satisfy the following relationship: 1.3 ≤ BFL / f ≤ 1.5, preferably 1.3 ≤ BFL / f ≤ 1.45. Based on miniaturization, by controlling the system optical back focal length BFL, the back focal length of the lens is made longer, which helps to reserve space for the installation of optical components, facilitates the assembly of the optical lens, avoids interference, and improves the assembly yield of the optical lens.

[0102] In some embodiments of the present invention, the Abbe number Vd4 of the fourth lens L4 and the Abbe number Vd5 of the fifth lens L5 satisfy the following relationship: 1≤|Vd4-Vd5|≤15, preferably 1≤|Vd4-Vd5|≤14;

[0103] The Abbe number Vd7 of the seventh lens L7 and the Abbe number Vd8 of the eighth lens L8 satisfy the following relationship: 40 ≤ |Vd7 - Vd8| ≤ 67, preferably 43.5 ≤ |Vd7 - Vd8| ≤ 64.5. By rationally selecting the lens materials of the fourth lens L4, the fifth lens L5, the seventh lens L7, and the eighth lens L8, and using glass lenses for the fourth lens L4, the fifth lens L5, the seventh lens L7, and the eighth lens L8, the transverse chromatic aberration of the optical system can be effectively corrected, avoiding the generation of purple fringing in the lens and improving the image quality of the lens; at the same time, it can also suppress the shift of the back focus of the optical system caused by temperature changes, thereby improving the stability of the system and contributing to the improvement of lens quality.

[0104] In some embodiments of the present invention, the image height H corresponding to the maximum field of view of the ultra-wide-angle lens is 4.5mm to 4.7mm. Further, the image height H corresponding to the maximum field of view of the ultra-wide-angle lens can be 4.6mm.

[0105] In some embodiments of the present invention, at least the ninth lens L9 among the first lens L1 to the ninth lens L9 is an aspherical lens. Aspherical surfaces have better radius of curvature characteristics, offering advantages in improving distortion aberrations and general aberrations. Using an aspherical surface can minimize aberrations occurring during imaging, thereby improving the resolving power of a fixed-focus lens.

[0106] In some embodiments of the present invention, the first to ninth lenses may be glass-plastic hybrid lenses, or all may be glass lenses. Using glass lenses can effectively suppress the shift in the back focal length of a fixed-focus lens due to temperature changes, improving the stability of the fixed-focus lens. Simultaneously, glass lenses can effectively avoid image blurring caused by high or low temperature environments, ensuring the normal use of the fixed-focus lens, and better correct system chromatic aberration, improving the resolving power of the fixed-focus lens. Using plastic lenses can effectively reduce manufacturing costs. Furthermore, all-glass optical lenses have a wider temperature range, maintaining stable optical performance within the range of -40℃ to 85℃.

[0107] Specifically, when focusing on resolution and reliability, the first to ninth lenses can all be glass lenses; when considering manufacturing costs, the first to ninth lenses can be a combination of glass and plastic lenses.

[0108] The following describes four specific embodiments of the ultra-wide-angle lens according to the present invention, based on the above-described configuration. The ultra-wide-angle lens according to the present invention has ten lenses. Each cemented surface of the cemented lens is designated as one surface, plus the aperture stop STO, the protective glass CG, and the image plane IMA, totaling 21 surfaces. The aperture stop STO is located between the fifth lens L5 and the sixth lens L6. For ease of description, each lens surface, aperture stop STO, and protective glass CG is numbered S1, S2 to S21. The aspherical surface satisfies the following formula:

[0109]

[0110] In the above formula, z is the axial distance from the vertex to the surface at a position perpendicular to the optical axis at a height y; c represents the curvature at the vertex of the aspherical surface; k is the conic coefficient; A4, A6, A8, A 10 A 12 A 14 A 16 ...represent aspheric coefficients of the fourth, sixth, eighth, tenth, twelfth, fourteenth, and sixteenth orders, respectively.

[0111] The data for the four sets of examples are shown in Table 1 below:

[0112] Conditional expression Example 1 Example 2 Example 3 Example 4 -0.3≤D10 / F10<0 -0.22 -0.11 -0.11 -0.11 -6.3≤f1 / f≤-4 -6.28 -4.51 -4.25 -4.60 -4≤f² / f≤-2.6 -2.82 -3.60 -3.75 -3.85 -1.8 ≤ f12 / f ≤ -1.6 -1.63 -1.67 -1.65 -1.72 -2.9≤f² / R²²≤-1.6 -2.37 -2.00 -1.81 -2.76 -6.7≤f³ / f≤-3.8 -6.34 -4.66 -5.19 -4.09 2.1≤f4 / f≤7 2.18 4.89 6.75 2.62 0 < |f6 / f5| ≤ 1.2 1.02 0.30 0.60 0.87 1.35≤f6 / fb≤3 1.56 1.41 1.91 2.81 -1.67≤f7 / f8≤-0.8 -1.56 -1.57 -1.32 -0.94 2.7≤f9 / f≤5 2.89 3.08 3.06 4.82 0.8 ≤ |R92 / f9| ≤ 2.5 1.14 1.29 0.94 2.07 -5.6≤fa / f≤-3.4 -5.32 -4.32 -4.36 -3.78 2.8 ≤ fb / f ≤ 3.2 3.16 2.86 2.91 2.89 -1.75≤fa / fb≤-1.2 -1.68 -1.51 -1.50 -1.30 -3≤f345 / fa≤-1.3 -1.36 -1.92 -1.96 -2.89 3.4≤FOV / H / D≤3.75 3.65 3.47 3.44 3.44 1.3 ≤ BFL / f ≤ 1.5 1.43 1.36 1.35 1.40 6.9 ≤ TTL * F / H ≤ 7.4 6.99 7.34 7.24 7.09 1≤|Vd4-Vd5|≤15 1.02 13.82 13.74 1.02 40≤|Vd7-Vd8|≤67 43.57 64.47 43.57 43.57

[0113] Table 1

[0114] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described in detail here, but the embodiments of the present invention are not limited to the following embodiments.

[0115] Example 1

[0116] Figure 1 This is a schematic diagram of the structure of the ultra-wide-angle lens in Embodiment 1 of the present invention.

[0117] In Embodiment 1, the tenth lens L10 is a convex-concave lens with negative optical power, the first lens L1 is a convex-concave lens with negative optical power, the second lens L2 is a convex-concave lens with negative optical power, the third lens L3 is a concave-concave lens with negative optical power, the fourth lens L4 is a convex-convex lens with positive optical power, the fifth lens L5 is a concave-convex lens with negative optical power, the sixth lens L6 is a convex-convex lens with positive optical power, the seventh lens L7 is a convex-convex lens with positive optical power, the eighth lens L8 is a concave-concave lens with negative optical power, and the ninth lens L9 is a convex-convex lens with positive optical power.

[0118] The second lens L2, the third lens L3, the sixth lens L6, and the ninth lens L9 are aspherical lenses; the aperture stop STO is positioned between the fifth lens L5 and the sixth lens L6. The fourth lens L4, the fifth lens L5, the seventh lens L7, and the eighth lens L8 form a cemented lens.

[0119] Table 2 lists the relevant parameters of each lens in the ultra-wide-angle lens of this embodiment, including: surface type, radius of curvature R, thickness d, refractive index Nd of the material, and Abbe number Vd.

[0120]

[0121] Table 2

[0122] Table 3 lists the aspherical coefficients of each aspherical lens in the ultra-wide-angle lens of this embodiment, including: the quadratic surface constant K, the fourth-order aspherical coefficient A4, the sixth-order aspherical coefficient A6, the eighth-order aspherical coefficient A8, and the tenth-order aspherical coefficient A... 10 12th order aspherical coefficient A 12 Fourteenth-order aspherical coefficient A 14 and the sixteenth-order aspherical coefficient A 16 .

[0123]

[0124]

[0125] Table 3

[0126] Combination Figure 1 As shown in Tables 1 to 3 above, in Example 1, the total focal length f of the ultra-wide-angle lens is 1.42, the FNO is 1.8, and the relative illumination RI is ≥75%.

[0127] This embodiment is an ultra-wide-angle lens that has at least one of the following characteristics: short total optical length and good thermal stability, large field of view (FOV) ≥ 196°, can be paired with a camera to achieve high resolution (25 million pixels), can achieve a large aperture (FNO ≤ 1.8), and high illumination (relative illumination ≥ 63%).

[0128] Example 2

[0129] Figure 2 This is a schematic diagram of the structure of the ultra-wide-angle lens in Embodiment 2 of the present invention.

[0130] In Embodiment 2, the tenth lens L10 is a convex-concave lens with negative optical power, the first lens L1 is a convex-concave lens with negative optical power, the second lens L2 is a convex-concave lens with negative optical power, the third lens L3 is a concave-convex lens with negative optical power, the fourth lens L4 is a concave-convex lens with positive optical power, the fifth lens L5 is a convex-concave lens with positive optical power, the sixth lens L6 is a convex-convex lens with positive optical power, the seventh lens L7 is a convex-convex lens with positive optical power, the eighth lens L8 is a concave-concave lens with negative optical power, and the ninth lens L9 is a convex-convex lens with positive optical power.

[0131] The fifth lens L5, the sixth lens L6, and the ninth lens L9 are aspherical lenses; the aperture stop STO is located between the fifth lens L5 and the sixth lens L6; the third lens L3, the fourth lens L4, the seventh lens L7, and the eighth lens L8 form a cemented lens.

[0132] Table 4 lists the relevant parameters of each lens in the ultra-wide-angle lens of this embodiment, including: surface type, radius of curvature R, thickness d, refractive index Nd of the material, and Abbe number Vd.

[0133]

[0134]

[0135] Table 4

[0136] Table 5 lists the aspherical coefficients of each aspherical lens in the ultra-wide-angle lens of this embodiment, including: the quadratic surface constant K, the fourth-order aspherical coefficient A4, the sixth-order aspherical coefficient A6, the eighth-order aspherical coefficient A8, and the tenth-order aspherical coefficient A... 10 12th order aspherical coefficient A 12 Fourteenth-order aspherical coefficient A 14 and the sixteenth-order aspherical coefficient A 16 .

[0137] Face number K A4 A6 A8 A10 A12 A14 A16 S10 -3.29 1.17E-02 -1.13E-04 1.10E-05 -4.32E-05 6.32E-07 -1.13E-06 0.00E+00 S11 3.64 3.26E-03 7.15E-04 -2.16E-04 -2.21E-04 -4.23E-05 -8.14E-06 0.00E+00 S13 -21890.45 7.04E-04 -2.24E-03 2.44E-04 -7.35E-05 -8.21E-05 -6.89E-06 0.00E+00 S14 -4.54 -1.51E-02 2.97E-04 -4.30E-04 6.53E-05 -8.21E-06 -4.35E-06 0.00E+00 S18 0.54 -8.78E-03 1.13E-03 -7.09E-04 3.12E-04 -8.90E-05 1.27E-05 -7.59E-07 S19 -3.03 6.02E-03 -7.38E-05 1.32E-04 -1.77E-06 -9.06E-06 1.47E-06 -9.66E-08

[0138] Table 5

[0139] Combination Figure 2 As shown in Tables 1, 4 and 5 above, in Example 2, the total focal length f of the ultra-wide-angle lens is 1.48, the FNO is 1.8, and the relative illumination RI is ≥75%.

[0140] This embodiment 2 is an ultra-wide-angle lens that has at least one of the following characteristics: short total optical length and good thermal stability, large field of view (FOV) ≥ 196°, can be paired with a camera to achieve high resolution (25 million pixels), can achieve a large aperture (FNO ≤ 1.8), and high illumination (relative illumination ≥ 63%).

[0141] Example 3

[0142] Figure 3 This is a schematic diagram of the structure of the ultra-wide-angle lens in Embodiment 3 of the present invention.

[0143] In Embodiment 3, the tenth lens L10 is a convex-concave lens with negative optical power, the first lens L1 is a convex-concave lens with negative optical power, the second lens L2 is a convex-concave lens with negative optical power, the third lens L3 is a concave-convex lens with negative optical power, the fourth lens L4 is a concave-convex lens with positive optical power, the fifth lens L5 is a convex-concave lens with positive optical power, the sixth lens L6 is a convex-convex lens with positive optical power, the seventh lens L7 is a convex-convex lens with positive optical power, the eighth lens L8 is a concave-concave lens with negative optical power, and the ninth lens L9 is a convex-convex lens with positive optical power.

[0144] The second lens L2 and the ninth lens L9 are aspherical lenses; the aperture stop STO is positioned between the fifth lens L5 and the sixth lens L6. The third lens L3, the fourth lens L4, the seventh lens L7, and the eighth lens L8 form a cemented lens.

[0145] Table 6 lists the relevant parameters of each lens in the ultra-wide-angle lens of this embodiment, including: surface type, radius of curvature R, thickness d, refractive index Nd of the material, and Abbe number Vd.

[0146]

[0147] Table 6

[0148] Table 7 lists the aspherical coefficients of each aspherical lens in the ultra-wide-angle lens of this embodiment, including: the quadratic surface constant K, the fourth-order aspherical coefficient A4, the sixth-order aspherical coefficient A6, the eighth-order aspherical coefficient A8, and the tenth-order aspherical coefficient A... 10 12th order aspherical coefficient A 12 Fourteenth-order aspherical coefficient A 14 and the sixteenth-order aspherical coefficient A 16 .

[0149] Face number K <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> <![CDATA[A 12 ]]> <![CDATA[A 14 ]]> <![CDATA[A 16 ]]> S5 0.00 1.30E-02 -2.98E-03 4.46E-04 -3.79E-05 9.70E-07 8.98E-08 -5.27E-09 S6 -0.68 2.27E-02 -4.71E-03 3.09E-03 -2.18E-03 1.02E-03 -2.38E-04 2.24E-05 S18 0.78 -1.23E-02 -7.09E-05 -3.85E-04 2.05E-04 -8.02E-05 1.32E-05 -7.67E-07 S19 -0.33 8.07E-03 -1.99E-03 1.72E-04 1.13E-05 -1.47E-05 2.53E-06 -1.34E-07

[0150] Table 7

[0151] Combination Figure 3 As shown in Tables 1, 6 and 7 above, in Example 3, the total focal length f of the ultra-wide-angle lens is 1.48, the FNO is 1.8, and the relative illumination RI is ≥73%.

[0152] This embodiment three is an ultra-wide-angle lens that has at least one of the following characteristics: short total optical length and good thermal stability, large field of view (FOV) ≥ 196°, can be paired with a camera to achieve high resolution (25 million pixels), can achieve a large aperture (FNO ≤ 1.8), and high illumination (relative illumination ≥ 63%).

[0153] Example 4

[0154] Figure 4 This is a schematic diagram of the structure of the ultra-wide-angle lens in Embodiment 4 of the present invention.

[0155] In Embodiment 4, the tenth lens L10 is a convex-concave lens with negative optical power, the first lens L1 is a convex-concave lens with negative optical power, the second lens L2 is a convex-concave lens with negative optical power, the third lens L3 is a concave-concave lens with negative optical power, the fourth lens L4 is a convex-convex lens with positive optical power, the fifth lens L5 is a concave-convex lens with negative optical power, the sixth lens L6 is a convex-concave lens with positive optical power, the seventh lens L7 is a convex-convex lens with positive optical power, the eighth lens L8 is a concave-convex lens with negative optical power, and the ninth lens L9 is a convex-concave lens with positive optical power.

[0156] The second lens L2, the third lens L3, the sixth lens L6, and the ninth lens L9 are aspherical lenses; the aperture stop STO is positioned between the fifth lens L5 and the sixth lens L6. The fourth lens L4, the fifth lens L5, the seventh lens L7, and the eighth lens L8 form a cemented lens.

[0157] Table 8 lists the relevant parameters of each lens in the ultra-wide-angle lens of this embodiment, including: surface type, radius of curvature R, thickness d, refractive index Nd of the material, and Abbe number Vd.

[0158]

[0159]

[0160] Table 8

[0161] Table 9 lists the aspherical coefficients of each aspherical lens in the ultra-wide-angle lens of this embodiment, including: the quadratic surface constant K, the fourth-order aspherical coefficient A4, the sixth-order aspherical coefficient A6, the eighth-order aspherical coefficient A8, and the tenth-order aspherical coefficient A... 10 12th order aspherical coefficient A 12 Fourteenth-order aspherical coefficient A 14 and the sixteenth-order aspherical coefficient A 16 .

[0162] Face number K A4 A6 A8 A10 A12 A14 A16 S5 -2.76 8.72E-03 -2.17E-03 2.58E-04 -3.40E-05 2.73E-06 -8.02E-08 0.00E+00 S6 -0.53 2.08E-02 1.78E-03 -2.50E-03 1.21E-03 -2.01E-04 -1.31E-05 3.87E-06 S7 -6.12 2.76E-02 -3.75E-03 5.44E-04 -4.76E-05 2.67E-05 -1.13E-05 1.03E-06 S8 14.46 2.59E-02 -4.79E-03 5.09E-04 -1.44E-05 -6.81E-05 2.01E-05 -2.12E-06 S13 1.23 1.16E-02 2.07E-03 -8.25E-04 4.45E-04 -1.19E-04 2.17E-05 -1.96E-06 S14 0.00 1.23E-02 1.29E-04 1.73E-03 -8.35E-04 2.86E-04 -4.57E-05 4.65E-06 S18 -3.04 1.38E-02 -1.72E-03 3.77E-04 -1.06E-04 1.38E-05 -1.04E-06 0.00E+00 S19 0.00 1.58E-02 -9.03E-04 1.22E-04 -9.69E-05 6.21E-06 2.17E-07 -1.30E-08

[0163] Table 9

[0164] Combination Figure 4 As shown in Tables 1, 8 and 9 above, in Example 4, the total focal length f of the ultra-wide-angle lens is 1.44, the FNO is 1.8, and the relative illumination RI is ≥80%.

[0165] This fourth embodiment is an ultra-wide-angle lens with one of the following characteristics: short optical length and good thermal stability, large field of view (FOV) ≥ 196°, high resolution (25 million pixels) when paired with a camera, large aperture (FNO ≤ 1.8), and high illumination (relative illumination ≥ 63%).

[0166] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An ultra-wide-angle lens comprising, in order from the object side to the image side along the optical axis: The first lens (L1) with negative optical power, the second lens (L2) with negative optical power, the third lens (L3) with negative optical power, the fourth lens (L4) with positive optical power, the fifth lens (L5), the sixth lens (L6) with positive optical power, the seventh lens (L7) with positive optical power, the eighth lens (L8) with negative optical power and the ninth lens (L9) with positive optical power, further comprising a tenth lens (L10) located on the object side of the first lens (L1), the tenth lens (L10) has negative optical power, the super-wide-angle lens has a total of ten lenses with optical power, characterized in that The optical total length TTL, the total focal length f and the image height H under the maximum field of view of the super-wide-angle lens satisfy the following relationship: 6.9≤TTL*f / H≤7.4; The tenth lens (L10), the first lens (L1) and the second lens (L2) are convex-concave type lenses; the seventh lens (L7) is a convex-convex type lens; The object side of the third lens (L3) is concave; the image side of the fourth lens (L4) is convex; the object side of the sixth lens (L6) is convex; the object side of the eighth lens (L8) is concave, and the object side of the ninth lens (L7) is convex.

2. The ultra-wide-angle lens according to claim 1, characterized in that, The optical effective aperture D10 of the tenth lens (L10) and the effective focal length f10 of the tenth lens (L10) satisfy the following relationship: -0.3≤D10 / f10<0.

3. The ultra-wide-angle lens according to claim 1, characterized in that, The first lens (L1) is a convex-concave type lens, the second lens (L2) is a convex-concave type lens, and the object side of the third lens (L3) is concave.

4. The ultra-wide-angle lens according to claim 1, characterized in that, The object side of the sixth lens (L6) is convex, the seventh lens (L7) is a convex-convex type lens, the object side of the eighth lens (L8) is concave, and the object side of the ninth lens (L9) is convex.

5. The ultra-wide-angle lens according to any one of claims 1-4, characterized in that, The third lens and the fourth lens are cemented, or the fourth lens and the fifth lens are cemented.

6. The ultra-wide-angle lens according to any one of claims 1 to 4, characterized in that, The seventh lens and the eighth lens constitute a cemented lens.

7. The ultra-wide-angle lens according to any one of claims 1 to 4, characterized in that, The effective focal length f1 of the first lens (L1) and the total focal length f of the super-wide-angle lens satisfy the following relationship: -6.3≤f1 / f≤-4.

8. The ultra-wide-angle lens according to any one of claims 1-4, characterized in that, The combined effective focal length f12 of the first lens (L1) and the second lens (L2) and the effective focal length f of the super-wide-angle lens satisfy the following relationship: -1.8≤f12 / f≤-1.

6.

9. The ultra-wide-angle lens according to any one of claims 1-4, characterized in that, The effective focal length f2 of the second lens (L2) and the total focal length f of the super-wide-angle lens satisfy the following relationship: -4≤f2 / f≤-2.

6.

10. The ultra-wide-angle lens according to any one of claims 1-4, characterized in that, The effective focal length f2 of the second lens (L2) and the image side curvature radius R22 of the second lens (L2) satisfy the following relationship: -2.9≤f2 / R22≤-1.

6.

11. The ultra-wide-angle lens according to any one of claims 1-4, characterized in that, The effective focal length f3 of the third lens (L3) and the total focal length f of the super-wide-angle lens satisfy the following relationship: -6.7≤f3 / f≤-3.

8.

12. The ultra-wide-angle lens according to any one of claims 1-4, characterized in that, The effective focal length f4 of the fourth lens (L4) and the total focal length f of the super-wide-angle lens satisfy the following relationship: 2.1≤f4 / f≤7.

13. The ultra-wide-angle lens according to any one of claims 1-4, characterized in that, An effective focal length f6 of the sixth lens (L6) and an effective focal length f5 of the fifth lens (L5) satisfy the following relation: 0 < |f6 / f5| ≤ 1.

2.

14. The ultra-wide-angle lens according to any one of claims 1-4, wherein, An effective focal length f6 of the sixth lens (L6) and an effective focal length fb of the rear lens group satisfy the following relation: 1.35 ≤ f6 / fb ≤ 3.

15. The ultra-wide-angle lens according to any one of claims 1-4, wherein, An effective focal length f7 of the seventh lens (L7) and an effective focal length f8 of the eighth lens (L8) satisfy the following relation: -1.67 ≤ f7 / f8 ≤ -0.

8.

16. The ultra-wide-angle lens according to any one of claims 1-4, wherein An effective focal length f9 of the ninth lens (L9) and a total focal length f of the ultra-wide-angle lens satisfy the following relation: 2.7 ≤ f9 / f ≤ 5.

17. The ultra-wide-angle lens according to any one of claims 1-4, wherein An image-side surface curvature radius R92 of the ninth lens (L9) and an effective focal length f9 of the ninth lens (L9) satisfy the following relation: 0.8 ≤ |R92 / f9| ≤ 2.

5.

18. The ultra-wide-angle lens according to any one of claims 1-4, wherein, An effective focal length fa of the front lens group and a total focal length f of the ultra-wide-angle lens satisfy the following relation -5.6 ≤ fa / f ≤ -3.

4.

19. The ultra-wide-angle lens according to any one of claims 1-4, wherein, An effective focal length fb of the rear lens group and a total focal length f of the ultra-wide-angle lens satisfy the following relation: 2.8 ≤ fb / f ≤ 3.

2.

20. The ultra-wide-angle lens according to any one of claims 1-4, wherein, An effective focal length fa of the front lens group and an effective focal length fb of the rear lens group satisfy the following relation: -1.75 ≤ fa / fb ≤ -1.

2.

21. The ultra-wide-angle lens according to any one of claims 1-4, wherein, A maximum field angle FOV of the ultra-wide-angle lens, an image height H at the maximum field angle, and a maximum aperture D satisfy the following relation: 3.4 ≤ FOV / H / D ≤ 3.

75.

22. The ultra-wide-angle lens according to any one of claims 1-4, wherein, A combined effective focal length f345 of the third lens (L3) to the fifth lens (L5) and an effective focal length fa of the front lens group satisfy the following relation: -3 ≤ f345 / fa ≤ -1.

3.

23. The ultra-wide-angle lens according to any one of claims 1-4, wherein, A back focal length BFL of the ultra-wide-angle lens and a total focal length f of the ultra-wide-angle lens satisfy the following relation: 1.3 ≤ BFL / f ≤ 1.

5.

24. The ultra-wide-angle lens according to any one of claims 1-4, wherein, A lens Abbe number Vd4 of the fourth lens (L4) and a lens Abbe number Vd5 of the fifth lens (L5) satisfy the following relation: 1 ≤ |Vd4-Vd5| ≤ 15. A lens Abbe number Vd7 of the seventh lens (L7) and a lens Abbe number Vd8 of the eighth lens (L8) satisfy the following relation: 40 ≤ |Vd7-Vd8| ≤ 67.

25. The ultra-wide-angle lens according to any one of claims 1-4, wherein, An image height H corresponding to a maximum field angle of the ultra-wide-angle lens is 4.5 mm to 4.7 mm.

26. The ultra-wide-angle lens according to claim 1, characterized in that, The ultra-wide-angle lens at least satisfies one of the following conditions: -6.3 ≤ f1 / f ≤ -4.2, -3.9 ≤ f2 / f ≤ -2.8, -1.75 ≤ f12 / f ≤ -1.6, -2.8 ≤ f2 / R22 ≤ -1.8, -6.4 ≤ f3 / f ≤ -4, 2.15 ≤ f4 / f ≤ 6.8, 0.25 ≤ |f6 / f5| ≤ 1.05, 1.4 ≤ f6 / fb ≤ 2.85, -1.6 ≤ f7 / f8 ≤ -0.9, 2.85 ≤ f9 / f ≤ 4.85, 0.9 ≤ |R92 / f9| ≤ 2.1, -5.4 ≤ fa / f ≤ -3.75, 2.8 ≤ fb / f ≤ 3.2, -1.7 ≤ fa / fb ≤ -1.25, -3 ≤ f345 / fa ≤ -1.3, 3.4≤FOV / H / D≤3.7, 1.3≤BFL / f≤1.45, 6.95≤TTL*F / H≤7.4, 1≤|Vd4-Vd5|≤14, 43.5≤|Vd7-Vd8|≤64.5, wherein, f1 is an effective focal length of the first lens (L1); f is a total focal length of the super wide-angle lens; f2 is an effective focal length of the second lens (L2); f12 is a combined effective focal length of the first lens (L1) and the second lens (L2); R22 is an image-side radius of curvature of the second lens (L2); f3 is an effective focal length of the third lens (L3); f4 is an effective focal length of the fourth lens (L4); f6 is an effective focal length of the sixth lens (L6); f5 is an effective focal length of the fifth lens (L5); fb is an effective focal length of a rear lens group; f7 is an effective focal length of the seventh lens (L7); f8 is an effective focal length of the eighth lens (L8); f9 is an effective focal length of the ninth lens (L9); R92 is an image-side radius of curvature of the ninth lens (L9); fa is an effective focal length of a front lens group; f345 is a combined effective focal length of the third lens (L3) to the fifth lens (L5); FOV is a maximum field of view angle of the super wide-angle lens; H is an image height at the maximum field of view angle of the super wide-angle lens; D is a maximum entrance pupil diameter of the super wide-angle lens; TTL is an optical total track length of the super wide-angle lens; BFL is a back focal length of the super wide-angle lens; Vd4 is a lens Abbe number of the fourth lens (L4); Vd5 is a lens Abbe number of the fifth lens (L5); Vd7 is a lens Abbe number of the seventh lens (L7); Vd8 is a lens Abbe number of the eighth lens (L8) Vd8.

27. The ultra-wide-angle lens according to claim 1 or 26, characterized in that, An optical effective diameter D10 of the tenth lens (L10) and an effective focal length f10 of the tenth lens (L10) satisfy: -0.3≤D10 / F10≤-0.1.

Images