Ultra-wide angle imaging lens

Abstract

The application relates to an ultra-wide-angle imaging lens, comprising: 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 and a tenth lens arranged in sequence along an optical axis from an object side to an image side, the first lens, the second lens, the third lens and the eighth lens have negative focal lengths, the fourth lens, the sixth lens, the seventh lens and the ninth lens have positive focal lengths, the fifth lens and the tenth lens have positive focal lengths or negative focal lengths; a condition formula is met between a curvature radius R51 of an object side surface of the fifth lens and a curvature radius R52 of an image side surface of the fifth lens: -0.8 <= (R51-R52) / (R51+R52) <= 0.2.

Description

Technical Field

[0001] This invention relates to the field of optical imaging system technology, and more particularly to an ultra-wide-angle imaging lens. Background Technology

[0002] With the development of technology, wide-angle lenses are widely used in various fields, such as action cameras, video surveillance, and automotive lenses. Currently, people have higher requirements for the field of view and resolution capabilities of wide-angle lenses.

[0003] In order to obtain a larger imaging range, acquire more environmental information, and better identify the information collected by the camera, wide-angle lenses are required to have a large field of view, while also having higher requirements for their resolving power.

[0004] However, while existing wide-angle lenses can increase the field of view, it is difficult to obtain a clear image while maintaining a large field of view, resulting in insufficient image quality. For example, a wide-angle optical imaging lens disclosed in Chinese patent CN111190267A can only achieve a resolution of 4K. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention aims to provide an ultra-wide-angle imaging lens with a maximum field of view of 160° and a resolution of up to 35 million pixels.

[0006] To achieve the above-mentioned objective, the present invention provides an ultra-wide-angle imaging lens, comprising: 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, and a tenth lens arranged sequentially along the optical axis from the object side to the image side; wherein the first lens, the second lens, the third lens, and the eighth lens have negative optical power; the fourth lens, the sixth lens, the seventh lens, and the ninth lens have positive optical power; the fifth lens has either positive or negative optical power; and the tenth lens has either positive or negative optical power.

[0007] The radius of curvature R51 of the object side of the fifth lens and the radius of curvature R52 of the image side of the fifth lens satisfy the condition: -0.8≤(R51-R52) / (R51+R52)≤0.2.

[0008] According to one aspect of the invention, along the optical axis from the object side to the image side,

[0009] The first lens is a convex-concave lens;

[0010] The image-side surface of the second lens is concave;

[0011] The image-side surface of the third lens is concave;

[0012] The object-side surface of the fourth lens is convex.

[0013] The fifth lens is a concave-convex lens;

[0014] The sixth lens is a convex-convex lens;

[0015] The seventh lens is a convex-convex lens;

[0016] The object-side surface of the eighth lens is concave;

[0017] The ninth lens is a convex-convex lens;

[0018] The tenth lens is a concave-convex lens or a convex-concave lens.

[0019] According to one aspect of the invention, the ultra-wide-angle imaging lens further comprises a cemented doublet lens formed by cementing the seventh lens and the eighth lens together.

[0020] According to one aspect of the invention, the radius of curvature R of the cemented surface of the doublet lens and the maximum aperture Φ of the cemented surface satisfy the condition: 0.8≤|R| / (Φ / 2)≤1.8.

[0021] According to one aspect of the invention, the Abbe number Vd7 of the material used for the seventh lens and the Abbe number Vd8 of the material used for the eighth lens satisfy the condition: 40≤|Vd7-Vd8|≤60.

[0022] According to one aspect of the invention, the effective focal length F7 of the seventh lens and the effective focal length F8 of the eighth lens satisfy the condition: 0.9≤|F7 / F8|≤2.1.

[0023] According to one aspect of the invention, the total optical length TTL of the ultra-wide-angle imaging lens and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: 8.0≤TTL / F≤9.2.

[0024] According to one aspect of the invention, the maximum optical aperture D1 of the first lens and the total optical length TTL of the ultra-wide-angle imaging lens satisfy the condition: 0.2≤D1 / TTL≤0.8.

[0025] According to one aspect of the invention, the radius of curvature R11 of the object side of the first lens and the radius of curvature R12 of the image side of the first lens satisfy the condition: 3.1≤R11 / R12≤6.0.

[0026] According to one aspect of the invention, the effective focal length F1 of the first lens and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: -4.5≤F1 / F≤-1.8.

[0027] According to one aspect of the invention, the effective focal length F1 of the first lens and the center thickness d1 of the first lens on the optical axis satisfy the condition: -22.6≤F1 / d1≤-8.5.

[0028] According to one aspect of the invention, the back focal length BFL of the ultra-wide-angle imaging lens and the total optical length TTL of the ultra-wide-angle imaging lens satisfy the condition: 0.09≤BFL / TTL≤0.3.

[0029] According to one aspect of the invention, the radius of curvature R71 of the object side of the seventh lens and the radius of curvature R72 of the image side of the seventh lens satisfy the condition: 1.1≤|R71 / R72|≤2.8.

[0030] According to one aspect of the invention, the radius of curvature R51 of the object side of the fifth lens, the radius of curvature R52 of the image side of the fifth lens, and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: 0.4≤|F / R51|+|F / R52|≤1.6.

[0031] According to one aspect of the invention, the air gap C56 between the fifth lens and the sixth lens and the total optical length TTL of the ultra-wide-angle imaging lens satisfy the condition: 0.0≤C56 / TTL≤0.05.

[0032] According to one aspect of the invention, the combined focal length F12 of the first lens and the second lens and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: 0.7≤|F12 / F|≤1.5.

[0033] According to one aspect of the invention, the refractive index Nd3 and Abbe number Vd3 of the third lens satisfy the following conditions: 1.4≤Nd3≤1.6; 75≤Vd3≤100.

[0034] According to the present invention, the ultra-wide-angle imaging lens uses ten lenses. By matching the shape of each lens, the positive and negative optical power, and setting reasonable parameters, the lens can achieve a large field of view (FOV≥160°), high resolution (35 million pixels), while also taking into account miniaturization, small size, no defocusing at high and low temperatures, large target surface (the imaging target surface can reach 1 / 1.8”), and the angle CRA of the main ray incident on the imaging chip is less than 18°, which is compatible with a variety of large target surface imaging chips. Attached Figure Description

[0035] 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. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0036] Figure 1 This diagram schematically illustrates the optical architecture of the ultra-wide-angle imaging lens according to Embodiment 1 of the present invention.

[0037] Figure 2 A schematic diagram illustrating the optical architecture of the ultra-wide-angle imaging lens according to Embodiment 2 of the present invention;

[0038] Figure 3 A schematic diagram illustrating the optical architecture of the ultra-wide-angle imaging lens according to Embodiment 3 of the present invention;

[0039] Figure 4 A schematic diagram illustrating the optical architecture of the ultra-wide-angle imaging lens according to Embodiment 4 of the present invention;

[0040] Figure 5 The diagram illustrates the optical architecture of the ultra-wide-angle imaging lens according to Embodiment 5 of the present invention. Specific Implementation

[0041] The description of the embodiments in this specification should be taken in conjunction with the accompanying drawings, which should form part of the complete specification. In the drawings, the shape or thickness of the embodiments may be exaggerated and may be indicated in a simplified or convenient manner. Furthermore, parts of the various structures in the drawings will be described separately; it is worth noting that elements not shown in the figures or not described in words are in a form known to those skilled in the art.

[0042] The description of the embodiments herein, including any references to directions and orientations, is for ease of description only and should not be construed as limiting the scope of the invention. The following description of preferred embodiments involves combinations of features, which may exist independently or in combination; the invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims.

[0043] In the embodiments of this specification, 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 side is called the image-side surface of the lens.

[0044] For example Figure 1 This invention discloses an ultra-wide-angle imaging lens, comprising: 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 tenth lens L10 arranged sequentially along the optical axis from the object side to the image side. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has negative optical power, the fourth lens L4 has positive optical power, the fifth lens L5 has either positive or negative optical power, the sixth lens L6 has positive optical power, the seventh lens L7 has positive optical power, the eighth lens L8 has negative optical power, the ninth lens L9 has positive optical power, and the tenth lens L10 has either positive or negative optical power.

[0045] According to an embodiment of the present invention, the radius of curvature R51 of the object side of the fifth lens L5 and the radius of curvature R52 of the image side of the fifth lens L5 satisfy the condition: -0.8≤(R51-R52) / (R51+R52)≤0.2, which can make the light path of the fifth lens from the object side relatively smooth, which is beneficial to correcting the aberration of the optical lens.

[0046] According to an embodiment of the present invention, along the optical axis from the object side to the image side, the first lens L1 is a convex-concave lens, the image side of the second lens L2 is concave, the image side of the third lens L3 is concave, the object side of the fourth lens L4 is convex, the fifth lens L5 is a concave-convex lens, the sixth lens L6, the seventh lens L7 and the ninth lens L9 are convex-convex lenses, the object side of the eighth lens L8 is concave, and the tenth lens L10 is a convex-concave lens or a concave-convex lens. In some embodiments, the second lens L2, the fifth lens L5, and the tenth lens L10 are aspherical lenses; in other embodiments, the second lens L2, the sixth lens L6, and the tenth lens L10 are aspherical lenses; furthermore, in other embodiments, the second lens L2, the fifth lens L5, the sixth lens L6, and the tenth lens L10 are all aspherical lenses; alternatively, the second lens L2, the fourth lens L4, the sixth lens L6, the ninth lens L9, and the tenth lens L10 can all be aspherical lenses; or alternatively, the second lens L2, the fourth lens L4, the sixth lens L6, and the tenth lens L10 can all be aspherical lenses. All of the above-mentioned first lenses L1 to tenth lenses L10 are made of glass.

[0047] According to an embodiment of the present invention, the ultra-wide-angle imaging lens further includes a cemented doublet lens formed by cementing a seventh lens L7 and an eighth lens L8.

[0048] In the ultra-wide-angle imaging system described above, the first lens L1, with negative optical power and a convex-concave shape, helps to reduce the angle of incident light, thereby decreasing the incident angle of light from subsequent optical systems and facilitating aberration correction. The second lens L2, also with negative optical power, further collects light entering from the first lens L1, allowing for a smooth transition of light to the rear optical system. It also shares some of the optical power of the first lens L1, contributing to improved relative illumination of the lens. The third lens L3, with its image-side surface being concave, further compresses the incident light from subsequent optical systems, enabling a larger aperture. The fourth lens L4, with positive optical power, helps to compensate for aberrations such as chromatic aberration and field curvature generated by the three lenses L1, L2, and L3 located on the object side of this lens, reducing the burden on the rear optical system to correct aberrations. The use of the fifth lens L5 helps compensate for astigmatism caused by the object-side optical structure. The sixth lens L6, a positive power convex-convex lens, facilitates the smooth transition of large-angle light rays from the front (object-side) to the rear (image-side). Setting the surface of either the fifth lens L5 or the sixth lens L6 as an aspherical surface also helps correct aberrations in the central field of view and allows for a larger aperture. The seventh lens L7, with its positive power and biconvex structure, helps to lower the angle of light rays from the image-side at the aperture stop STO, allowing more light to enter the subsequent optical system and increasing the illumination of the image plane. The object-side surface of the eighth lens L8 is concave, forming a cemented lens with the seventh lens L7, which helps correct chromatic aberration and has low tolerance sensitivity. The ninth lens L9, with its positive power, helps compensate for field curvature caused by its object-side optical structure, improving image quality. Designing the tenth lens L10 as an aspherical surface is beneficial for correcting distortion at the edge of the field of view, resulting in better image quality. It also helps to control the angle at which the main ray is incident on the imaging chip to match the requirements of the chip's CRA curve.

[0049] Furthermore, the radius of curvature R of the cemented surface formed by the image-side surface of the seventh lens L7 and the object-side surface of the eighth lens L8, and the maximum aperture Φ of this cemented surface, satisfy the condition: 0.8 ≤ |R| / (Φ / 2) ≤ 1.8. By ensuring that the cemented surface between the seventh lens L7 and the eighth lens L8 satisfies the above relationship, the advanced aberrations generated by the cemented lens can be effectively controlled, thereby improving the imaging quality and resolving power of the optical lens.

[0050] Furthermore, the Abbe number Vd7 of the material used for the seventh lens L7 and the Abbe number Vd8 of the material used for the eighth lens L8 satisfy the condition: 40 ≤ |Vd7 - Vd8| ≤ 60. In the bonded assembly formed by the seventh positive lens and the eighth negative lens from the object side, the difference in Abbe number between the positive and negative lenses is greater than 40, which can effectively correct the chromatic aberration of the optical system and improve the image quality.

[0051] Furthermore, the effective focal length F7 of the seventh lens L7 and the effective focal length F8 of the eighth lens L8 satisfy the condition: 0.9 ≤ |F7 / F8| ≤ 2.1. In the adhesive body formed by the seventh positive lens and the eighth negative lens from the object side, the absolute values ​​of the focal lengths of the positive and negative lenses are similar, which helps to smooth the transition of light and is also beneficial to correct chromatic aberration and improve image quality.

[0052] According to an embodiment of the present invention, the total optical length (TTL) of the ultra-wide-angle imaging lens and the total effective focal length (F) of the ultra-wide-angle imaging lens satisfy the condition: 8.0 ≤ TTL / F ≤ 9.2. Furthermore, the maximum optical aperture (D1) of the first lens L1 and the total optical length (TTL) of the ultra-wide-angle imaging lens satisfy the condition: 0.2 ≤ D1 / TTL ≤ 0.8. By designing the total optical length (TTL) of the lens to satisfy the above conditions, it is beneficial to achieve miniaturization of the optical lens.

[0053] According to an embodiment of the present invention, the radius of curvature R11 of the object side of the first lens L1 and the radius of curvature R12 of the image side of the first lens L1 satisfy the condition: 3.1 ≤ R11 / R12 ≤ 6.0. This helps to reasonably control the shape of the first lens from the object side and collect light rays at a larger angle into the subsequent optical system.

[0054] According to an embodiment of the present invention, the effective focal length F1 of the first lens L1 and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: -4.5 ≤ F1 / F ≤ -1.8. By appropriately setting the focal length of the first lens from the object side, the first lens can provide sufficient refractive power to the optical imaging system while maintaining the large field of view characteristic of the entire optical imaging system.

[0055] According to an embodiment of the present invention, the effective focal length F1 of the first lens L1 and the center thickness d1 of the first lens L1 on the optical axis satisfy the condition: -22.6 ≤ F1 / d1 ≤ -8.5. This allows the optical lens to have a large field of view, while also facilitating lens miniaturization, thus achieving a balance between a large field of view and miniaturization.

[0056] According to an embodiment of the present invention, the back focal length (BFL) of the ultra-wide-angle imaging lens and the total optical length (TTL) of the ultra-wide-angle imaging lens satisfy the condition: 0.09 ≤ BFL / TTL ≤ 0.3. The aforementioned back focal length refers to the distance from the center of the image-side surface of the tenth lens L10 to the center of the image plane IMA. This design helps reduce the energy of ghost images generated by reflections between the optical lens and the filter G1, which is beneficial for the assembly of the image sensor.

[0057] According to an embodiment of the present invention, the radius of curvature R71 of the object side of the seventh lens L7 and the radius of curvature R72 of the image side of the seventh lens L7 satisfy the condition: 1.1 ≤ |R71 / R72| ≤ 2.8. This compresses the light collected by the sixth lens from the object side, resulting in a relatively smooth light path that transitions smoothly into the rear optical structure (i.e., the image side of the seventh lens L7). Simultaneously, this effectively reduces aberrations in the entire optical imaging system, thereby improving image quality.

[0058] According to an embodiment of the present invention, the radius of curvature R51 of the object side of the fifth lens L5, the radius of curvature R52 of the image side of the fifth lens L5, and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: 0.4 ≤ |F / R51| + |F / R52| ≤ 1.6. By effectively controlling the radius of curvature of the fifth lens from the object side, astigmatism can be corrected and the imaging quality of the optical lens can be improved.

[0059] According to an embodiment of the present invention, the air gap C56 between the fifth lens L5 and the sixth lens L6, and the total optical length TTL of the ultra-wide-angle imaging lens satisfy the condition: 0.0 ≤ C56 / TTL ≤ 0.05. Reasonably adjusting the air gap between the fifth and sixth lenses from the object side facilitates a smoother transition of light, thereby improving production yield and reducing production costs.

[0060] According to an embodiment of the present invention, the combined focal length F12 of the first lens L1 and the second lens L2, and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: 0.7 ≤ |F12 / F| ≤ 1.5. By rationally allocating the combined focal length of the first and second lenses from the object side, the light deflection angle can be effectively reduced, allowing the light to smoothly transition to the subsequent optical system and improving the lens resolution.

[0061] According to an embodiment of the present invention, the refractive index Nd3 and Abbe number Vd3 of the material used for the third lens L3 satisfy the following conditions: 1.4 ≤ Nd3 ≤ 1.6; 75 ≤ Vd3 ≤ 100. The use of a high-dispersion material for the third lens L3 can effectively compensate for chromatic aberration in the optical imaging system and improve image quality.

[0062] In summary, based on the above design scheme, the ultra-wide-angle imaging lens of this invention combines miniaturization, a large field of view, a large image area, and high imaging quality. Specifically, the lens of this ultra-wide-angle optical imaging system has a short overall length, small size, and a resolution of up to 35 million pixels. The maximum field of view can reach 160°, and the imaging target area can reach 1 / 1.8”. The angle of incidence (CRA) of the main ray on the imaging chip is less than 18°, making it compatible with a variety of large-area imaging chips. It has broad application prospects and high market competitiveness. Furthermore, through the reasonable combination of lens materials, high-quality imaging can be achieved within a temperature range of -40 to 80°C (within this range, the resolution can generally reach 35 million pixels).

[0063] The ultra-wide-angle imaging lens of the present invention will be specifically described below with reference to five embodiments, accompanying drawings, and tables. In the following embodiments, the aperture stop STO is referred to as one side, the filter G1 as two sides, the image plane IMA as one side, and the cemented surface as one side.

[0064] The parameters for each embodiment that meets the above conditions are shown in Table 1 below:

[0065]

[0066]

[0067] Table 1

[0068] In an embodiment of the present invention, the aspherical lens of the ultra-wide-angle imaging lens satisfies the following formula:

[0069]

[0070] 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 h; 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.

[0071] Example 1

[0072] See Figure 1 In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fifth lens L5, the eighth lens L8, and the tenth lens L10 all have negative optical power, while the fourth lens L4, the sixth lens L6, the seventh lens L7, and the ninth lens L9 all have positive optical power. The aperture stop STO is located between the fifth lens L5 and the sixth lens L6.

[0073] Along the optical axis from the object side to the image side, the first lens L1 and the second lens L2 are both convex-concave lenses, the third lens L3 is a concave-concave lens, the fourth lens L4, the sixth lens L6, the seventh lens L7 and the ninth lens L9 are all convex-convex lenses, and the fifth lens L5, the eighth lens L8 and the tenth lens L10 are all concave-convex lenses.

[0074] The second lens L2, the fifth lens L5, and the tenth lens L10 are all aspherical lenses.

[0075] This embodiment includes two cemented doublet lenses, one of which is cemented together by a third lens L3 and a fourth lens L4, and the other is cemented together by a seventh lens L7 and an eighth lens L8.

[0076] The relevant parameters of each lens in the ultra-wide-angle imaging lens of this embodiment include: surface number (Surf), surface type (Type), radius of curvature (Radius), thickness (Thickness), refractive index of the material (Nd), and Abbe number (Vd), as shown in Table 2 below.

[0077]

[0078] Table 2

[0079] The aspherical coefficients of each aspherical lens in the ultra-wide-angle imaging lens of this embodiment include: 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 A1. 10 and the twelfth-order aspherical coefficient A 12 As shown in Table 3 below.

[0080]

[0081] Table 3

[0082] Combination Figure 1 As shown in Tables 1 to 3 above, the ultra-wide-angle imaging lens of this embodiment combines miniaturization, a wide field of view, a large image plane, and high imaging quality. The maximum field of view can reach 160°, while the resolution reaches 35 million pixels.

[0083] Example 2

[0084] See Figure 2 In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fifth lens L5, the eighth lens L8, and the tenth lens L10 all have negative optical power, while the fourth lens L4, the sixth lens L6, the seventh lens L7, and the ninth lens L9 all have positive optical power. The aperture stop STO is located between the fifth lens L5 and the sixth lens L6.

[0085] Along the optical axis from the object side to the image side, the first lens L1 and the second lens L2 are both convex-concave lenses, the third lens L3 and the eighth lens L8 are both concave-concave lenses, the fourth lens L4, the sixth lens L6, the seventh lens L7 and the ninth lens L9 are all convex-convex lenses, and the fifth lens L5 and the tenth lens L10 are both concave-convex lenses.

[0086] The second lens L2, the fourth lens L4, the sixth lens L6, the ninth lens L9, and the tenth lens L10 are all aspherical lenses.

[0087] This embodiment includes a cemented doublet lens composed of a seventh lens L7 and an eighth lens L8 cemented together.

[0088] The relevant parameters of each lens in the ultra-wide-angle imaging lens of this embodiment include: surface number (Surf), surface type (Type), radius of curvature (Radius), thickness (Thickness), refractive index of the material (Nd), and Abbe number (Vd), as shown in Table 4 below.

[0089]

[0090] Table 4

[0091] The aspherical coefficients of each aspherical lens in the ultra-wide-angle imaging lens of this embodiment include: 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 A1. 10 12th order aspherical coefficient A 12 Fourteenth-order aspherical coefficient A 14 and the sixteenth-order aspherical coefficient A 16 As shown in Table 5 below.

[0092] Surf K <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> <![CDATA[A 12 ]]> <![CDATA[A 14 ]]> <![CDATA[A 16 ]]> 3 -5.4951 4.63E-03 -5.80E-04 4.65E-05 -2.06E-06 3.52E-08 3.26E-10 -7.59E-12 4 -0.3676 7.68E-04 -4.44E-04 -6.59E-05 1.46E-05 -1.12E-06 -6.43E-18 -7.90E-20 7 -1.9804 2.84E-03 1.58E-04 -1.52E-05 2.25E-06 -2.42E-07 -7.29E-18 -1.63E-19 8 -90.00 4.98E-03 2.89E-04 -6.77E-06 1.14E-05 -1.80E-06 -1.22E-18 -4.34E-21 12 -6.2262 3.40E-03 -6.36E-05 1.34E-05 -3.79E-06 4.10E-07 -1.89E-08 7.97E-20 13 0.2534 7.23E-04 -3.23E-05 2.20E-05 -4.98E-06 5.34E-07 -2.44E-08 -3.39E-20 17 -3.2191 -8.40E-04 4.99E-05 -8.25E-06 -9.00E-07 9.36E-08 9.57E-09 -6.66E-10 18 -0.1766 1.38E-03 -5.32E-05 8.68E-06 -1.97E-06 1.64E-07 -5.53E-10 -1.94E-10 19 90.00 -3.05E-03 -1.17E-04 -3.29E-06 1.03E-06 6.59E-08 2.71E-10 -4.52E-10 20 90.00 -1.29E-03 -1.71E-04 1.07E-05 1.91E-07 -2.14E-09 -2.64E-10 -4.61E-11

[0093] Table 5

[0094] Combination Figure 2 As shown in Tables 1, 4, and 5 above, the ultra-wide-angle imaging lens of this embodiment combines miniaturization, a wide field of view, a large image plane, and high imaging quality. The maximum field of view can reach 160°, while the resolution reaches 35 million pixels.

[0095] Example 3

[0096] See Figure 3 In this embodiment, the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 all have negative optical power, while the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the ninth lens L9, and the tenth lens L10 all have positive optical power. The aperture stop STO is located between the fifth lens L5 and the sixth lens L6.

[0097] Along the optical axis from the object side to the image side, the first lens L1, the second lens L2, the third lens L3 and the fourth lens L4 are all convex-concave lenses, the sixth lens L6, the seventh lens L7 and the ninth lens L9 are all convex-convex lenses, the eighth lens L8 is a concave-concave lens, and the fifth lens L5 and the tenth lens L10 are both concave-convex lenses.

[0098] The second lens L2, the fourth lens L4, the sixth lens L6, and the tenth lens L10 are all aspherical lenses.

[0099] This embodiment includes a cemented doublet lens composed of a seventh lens L7 and an eighth lens L8 cemented together.

[0100] The relevant parameters of each lens in the ultra-wide-angle imaging lens of this embodiment include: surface number (Surf), surface type (Type), radius of curvature (Radius), thickness (Thickness), refractive index of the material (Nd), and Abbe number (Vd), as shown in Table 6 below.

[0101]

[0102]

[0103] Table 6

[0104] The aspherical coefficients of each aspherical lens in the ultra-wide-angle imaging lens of this embodiment include: 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 A1. 10 12th order aspherical coefficient A 12 and the fourteenth-order aspherical coefficient A 14 As shown in Table 7 below.

[0105] Surf K <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> <![CDATA[A 12 ]]> <![CDATA[A 14 ]]> 3 -1.0379 5.91E-03 -6.45E-04 4.63E-05 -1.77E-06 3.30E-08 0.00E+00 4 -0.1507 5.78E-03 -7.58E-04 1.41E-05 2.62E-06 -2.03E-07 0.00E+00 7 -0.7748 3.04E-03 1.24E-04 -2.81E-05 2.96E-06 -3.40E-07 0.00E+00 8 40.2269 5.66E-03 1.90E-04 2.28E-05 -2.72E-06 -1.16E-06 0.00E+00 12 -70.0572 2.83E-03 -3.09E-05 4.24E-06 -1.11E-06 1.33E-07 -4.29E-09 13 0.2312 1.09E-03 2.00E-05 1.51E-05 -2.32E-06 2.24E-07 -5.59E-09 19 58.5743 -3.01E-03 -2.05E-04 -8.22E-06 1.40E-06 4.37E-09 0.00E+00 20 -16.5817 -9.20E-04 -2.87E-04 1.49E-05 -1.21E-07 1.17E-09 0.00E+00

[0106] Table 7

[0107] Combination Figure 3 As shown in Tables 1, 6, and 7 above, the ultra-wide-angle imaging lens of this embodiment combines miniaturization, a wide field of view, a large image plane, and high imaging quality. The maximum field of view can reach 160°, while the resolution reaches 35 million pixels.

[0108] Example 4

[0109] See Figure 4In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fifth lens L5, and the eighth lens L8 all have negative optical power, while the fourth lens L4, the sixth lens L6, the seventh lens L7, the ninth lens L9, and the tenth lens L10 all have positive optical power. The aperture stop STO is located between the fifth lens L5 and the sixth lens L6.

[0110] Along the optical axis from the object side to the image side, the first lens L1, the second lens L2, the third lens L3 and the tenth lens L10 are all convex-concave lenses, the fourth lens L4, the sixth lens L6, the seventh lens L7 and the ninth lens L9 are all convex-convex lenses, the eighth lens L8 is a concave-concave lens, and the fifth lens L5 is a concave-convex lens.

[0111] The second lens L2, the sixth lens L6, and the tenth lens L10 are all aspherical lenses.

[0112] This embodiment includes a cemented doublet lens composed of a seventh lens L7 and an eighth lens L8 cemented together.

[0113] The relevant parameters of each lens in the ultra-wide-angle imaging lens of this embodiment include: surface number (Surf), surface type (Type), radius of curvature (Radius), thickness (Thickness), refractive index of the material (Nd), and Abbe number (Vd), as shown in Table 8 below.

[0114]

[0115]

[0116] Table 8

[0117] The aspherical coefficients of each aspherical lens in the ultra-wide-angle imaging lens of this embodiment include: 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 A1. 10 12th order aspherical coefficient A 12 Fourteenth-order aspherical coefficient A 14 and the sixteenth-order aspherical coefficient A 16 As shown in Table 9 below.

[0118] Surf K <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> <![CDATA[A 12 ]]> <![CDATA[A 14 ]]> <![CDATA[A 16 ]]> 3 4.1795 9.25E-03 -9.87E-04 6.80E-05 -3.56E-06 1.72E-08 8.04E-09 -3.16E-10 4 -0.4964 1.31E-02 -6.31E-04 1.67E-05 4.39E-08 -7.77E-08 2.58E-09 -3.50E-18 12 -3.3824 3.32E-03 -9.72E-05 1.48E-05 -3.49E-06 4.29E-07 -2.61E-08 8.45E-20 13 5.4049 5.22E-04 -7.43E-05 2.83E-05 -7.22E-06 8.38E-07 -4.46E-08 -6.98E-19 19 1.9413 -5.03E-03 -1.13E-04 -5.96E-05 7.83E-06 -5.75E-07 2.02E-08 -6.68E-18 20 -28.5976 -2.89E-03 -2.10E-04 -8.26E-06 1.98E-06 -5.19E-08 -3.92E-09 1.98E-10

[0119] Table 9

[0120] Combination Figure 4 As shown in Tables 1, 8, and 9 above, the ultra-wide-angle imaging lens of this embodiment combines miniaturization, a wide field of view, a large image plane, and high imaging quality. The maximum field of view can reach 160°, while the resolution reaches 35 million pixels.

[0121] Example 5

[0122] See Figure 5 In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fifth lens L5, the eighth lens L8, and the tenth lens L10 all have negative optical power, while the fourth lens L4, the sixth lens L6, the seventh lens L7, and the ninth lens L9 all have positive optical power. The aperture stop STO is located between the fifth lens L5 and the sixth lens L6.

[0123] Along the optical axis from the object side to the image side, the first lens L1, the second lens L2, and the tenth lens L10 are all convex-concave lenses; the fourth lens L4, the sixth lens L6, the seventh lens L7, and the ninth lens L9 are all convex-convex lenses; the third lens L3 and the eighth lens L8 are concave-concave lenses; and the fifth lens L5 is a concave-convex lens.

[0124] The second lens L2, the fifth lens L5, the sixth lens L6, and the tenth lens L10 are all aspherical lenses.

[0125] This embodiment includes a cemented doublet lens composed of a seventh lens L7 and an eighth lens L8 cemented together.

[0126] The relevant parameters of each lens in the ultra-wide-angle imaging lens of this embodiment include: surface number (Surf), surface type (Type), radius of curvature (Radius), thickness (Thickness), refractive index of the material (Nd), and Abbe number (Vd), as shown in Table 10 below.

[0127]

[0128]

[0129] Table 10

[0130] The aspherical coefficients of each aspherical lens in the ultra-wide-angle imaging lens of this embodiment include: 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 A1. 10 and the twelfth-order aspherical coefficient A 12 As shown in Table 11 below.

[0131]

[0132]

[0133] Table 11

[0134] Combination Figure 5As shown in Tables 1, 10, and 11 above, the ultra-wide-angle imaging lens of this embodiment combines miniaturization, a wide field of view, a large image plane, and high imaging quality. The maximum field of view can reach 160°, while the resolution reaches 35 million pixels.

[0135] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ultra-wide-angle imaging lens, comprising: A first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), a seventh lens (L7), an eighth lens (L8), a ninth lens (L9), and a tenth lens (L10) are arranged sequentially along the optical axis from the object side to the image side, totaling ten lenses with optical power. The first lens (L1), the second lens (L2), the third lens (L3), and the eighth lens (L8) have negative optical power, while the fourth lens (L4), the sixth lens (L6), the seventh lens (L7), and the ninth lens (L9) have positive optical power. The fifth lens (L5) and the tenth lens (L10) have either positive or negative optical power. The radius of curvature R51 of the object side of the fifth lens (L5) and the radius of curvature R52 of the image side of the fifth lens (L5) satisfy the condition: -0.8≤(R51-R52) / (R51+R52)≤0.2; The radius of curvature R11 of the object side of the first lens (L1) and the radius of curvature R12 of the image side of the first lens (L1) satisfy the condition: 3.1≤R11 / R12≤6.

0.

2. The ultra-wide-angle imaging lens according to claim 1, characterized in that, Along the optical axis from the object side to the image side, The first lens (L1) is a convex-concave lens; The image-side surface of the second lens (L2) is concave; The image-side surface of the third lens (L3) is concave; The object-side surface of the fourth lens (L4) is convex. The fifth lens (L5) is a concave-convex lens; The sixth lens (L6) is a convex-convex lens; The seventh lens (L7) is a convex-convex lens; The object-side surface of the eighth lens (L8) is concave; The ninth lens (L9) is a convex-convex lens; The tenth lens (L10) is a concave-convex lens or a convex-concave lens.

3. The ultra-wide-angle imaging lens according to claim 1, characterized in that, The ultra-wide-angle imaging lens also includes a cemented doublet lens formed by cementing the seventh lens (L7) and the eighth lens (L8).

4. The ultra-wide-angle imaging lens according to claim 3, characterized in that, The radius of curvature R of the cemented surface of the doublet lens and the maximum aperture Φ of the cemented surface satisfy the condition: 0.8≤|R| / (Φ / 2)≤1.

8.

5. The ultra-wide-angle imaging lens according to claim 3, characterized in that, The Abbe number Vd7 of the seventh lens (L7) and the Abbe number Vd8 of the eighth lens (L8) satisfy the condition: 40≤|Vd7-Vd8|≤60.

6. The ultra-wide-angle imaging lens according to claim 3, characterized in that, The effective focal length F7 of the seventh lens (L7) and the effective focal length F8 of the eighth lens (L8) satisfy the condition: 0.9≤|F7 / F8|≤2.

1.

7. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The total optical length (TTL) of the ultra-wide-angle imaging lens and the total effective focal length (F) of the ultra-wide-angle imaging lens satisfy the condition: 8.0 ≤ TTL / F ≤ 9.

2.

8. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The maximum optical aperture D1 of the first lens (L1) and the total optical length TTL of the ultra-wide-angle imaging lens satisfy the condition: 0.2≤D1 / TTL≤0.

8.

9. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The effective focal length F1 of the first lens (L1) and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: -4.5≤F1 / F≤-1.

8.

10. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The effective focal length F1 of the first lens (L1) and the center thickness d1 of the first lens (L1) on the optical axis satisfy the condition: -22.6≤F1 / d1≤-8.

5.

11. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The back focal length BFL of the ultra-wide-angle imaging lens and the total optical length TTL of the ultra-wide-angle imaging lens satisfy the condition: 0.09≤BFL / TTL≤0.

3.

12. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The curvature radius R71 of the object side of the seventh lens (L7) and the curvature radius R72 of the image side of the seventh lens (L7) satisfy the condition: 1.1≤|R71 / R72|≤2.

8.

13. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The radius of curvature R51 of the object side of the fifth lens (L5), the radius of curvature R52 of the image side of the fifth lens (L5), and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: 0.4≤|F / R51|+|F / R52|≤1.

6.

14. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The air gap C56 between the fifth lens (L5) and the sixth lens (L6) and the total optical length TTL of the ultra-wide-angle imaging lens satisfy the condition: 0.0≤C56 / TTL≤0.

05.

15. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The combined focal length F12 of the first lens (L1) and the second lens (L2) and the total effective focal length F of the ultra-wide-angle imaging lens satisfy the condition: 0.7≤|F12 / F|≤1.

5.

16. The ultra-wide-angle imaging lens according to any one of claims 1 to 6, characterized in that, The refractive index Nd3 and Abbe number Vd3 of the third lens (L3) satisfy the following conditions: 1.4≤Nd3≤1.6; 75≤Vd3≤100.

Images