Optical lens and optical lens module for wide-angle camera

Abstract

The application discloses an optical lens and an optical lens module with a small head wide angle, and belongs to the technical field of optical imaging. The optical lens comprises, in sequence from the object side to the image side along the optical axis, a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power. The optical lens satisfies the following conditional expressions: 3.430 <= Tan(Semi-Fov) / CT1 <= 5.136; 7.657 <= (ET3+ET4) / T34 <= 30.002. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are combined and arranged as described above, which is favorable for reducing stray light generated in the first lens and improving the imaging quality of the optical lens. Meanwhile, the optical lens is favorable for meeting the characteristic of a small view depth and has a wide-angle characteristic, and the optical lens is convenient for miniaturization.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and in particular to a small-head wide-angle optical lens and an optical lens module. Background Technology

[0002] With the continuous updates and iterations of portable electronic devices such as smartphones and tablets, full-screen displays have become the mainstream development trend. However, as the market demands higher and higher pixel counts for lenses, the size of lenses is also increasing. Furthermore, previously small lenses often had a large depth of view, resulting in larger screen openings and difficulty in increasing the screen-to-body ratio, which makes it difficult to meet the market demand for full-screen displays.

[0003] Based on this, the present invention proposes a front-facing camera with a large field of view, small head, shallow viewing depth, and high imaging quality, which satisfies the need to increase the screen ratio, make the full screen more beautiful, and help improve the user experience. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is to propose a small-head wide-angle optical lens and camera module that meets the requirements of large field of view, small head, small viewpoint depth and high imaging quality.

[0005] In a first aspect, an optical lens comprises: arranged sequentially along the optical axis from the object side to the image side:

[0006] A first lens with positive optical power; its object-side surface is convex near the optical axis;

[0007] A second lens with positive optical power; its image-side surface is convex near the optical axis.

[0008] The third lens with negative optical power has a convex image-side surface near the optical axis;

[0009] A fourth lens with positive optical power, the object-side surface of which is convex near the optical axis; and

[0010] A fifth lens with negative optical power;

[0011] The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are all aspherical lenses; the optical lens satisfies the following condition:

[0012] 3.430≤Tan(Semi-Fov) / CT1≤5.136;

[0013] 7.657≤(ET3+ET4) / T34≤30.002;

[0014] Wherein, Semi-Fov is half of the maximum field of view of the optical lens; CT1 is the center thickness of the first lens on the optical axis; ET3 is the edge thickness of the third lens; ET4 is the edge thickness of the fourth lens; and T34 is the distance between the third lens and the fourth lens on the optical axis.

[0015] Optionally, the optical lens satisfies the following condition:

[0016] 1.181≤f / R11≤1.585;

[0017] Where f is the total effective focal length of the optical lens; R11 is the radius of curvature of the side surface of the first lens.

[0018] Optionally, the optical lens satisfies the following condition:

[0019] 0.970≤f345 / (f23-f34)≤0.996;

[0020] Wherein, f345 is the combined focal length of the third lens, the fourth lens, and the fifth lens; f23 is the combined focal length of the second lens and the third lens; and f34 is the combined focal length of the third lens and the fourth lens.

[0021] Optionally, the optical lens satisfies the following condition:

[0022] 11.326≤(DT11+DT12) / (SAG11-SAG12)≤29.998;

[0023] Wherein, DT11 is the maximum effective radius of the object side of the first lens; DT12 is the maximum effective radius of the image side of the first lens; SAG11 is the sag value SG of the object side of the first lens corresponding to the maximum field of view of the optical lens; and SAG12 is the sag value SG of the image side of the first lens corresponding to the maximum field of view of the optical lens.

[0024] Optionally, the optical lens satisfies the following condition:

[0025] -2.696≤(R41-R42) / f3≤-2.230;

[0026] Wherein, R41 is the radius of curvature of the object side of the fourth lens; R42 is the radius of curvature of the image side of the fourth lens; and f3 is the effective focal length of the third lens.

[0027] Optionally, the optical lens satisfies the following condition:

[0028] 0.608≤N3 / (CT2+CT4)≤2.689;

[0029] Wherein, N3 is the refractive index of the third lens; CT2 is the center thickness of the second lens on the optical axis; and CT4 is the center thickness of the fourth lens.

[0030] Optionally, the optical lens satisfies the following condition:

[0031] -0.500≤(SAG51+SAG52) / ET5≤0.373;

[0032] Wherein, SAG51 is the sagitta SG value of the object side of the fifth lens corresponding to the maximum field of view of the optical lens; SAG52 is the sagitta SG value of the image side of the fifth lens corresponding to the maximum field of view of the optical lens; and ET5 is the edge thickness of the fifth lens.

[0033] Optionally, the optical lens satisfies the following condition:

[0034] 2.239≤ImgH / (T12+T23)≤8.772;

[0035] Wherein, ImgH is the maximum image height of the optical lens, T12 is the air gap distance between the first lens and the second lens on the optical axis, and T23 is the air gap distance between the second lens and the third lens on the optical axis.

[0036] Secondly, an optical lens module is provided, characterized by including an optical lens that balances small head size, shallow depth of view, and wide angle. The beneficial effects of this invention are:

[0037] By reasonably allocating the ratio of half the tangent of the maximum field of view of the optical lens to the center thickness of the first lens on the optical axis within a reasonable range, it is beneficial to reduce stray light generated in the first lens and improve the imaging quality of the optical lens; at the same time, it is beneficial to meet the characteristics of small depth of view, while also having wide-angle characteristics, which facilitates the miniaturization of the optical lens.

[0038] By reasonably allocating the sum of the edge thicknesses of the third lens and the fourth lens, and constraining the ratio of this sum to the distance between the third and fourth lenses on the optical axis within a reasonable range, it is beneficial to make the optical lens structure more compact, shorten the total length of the optical lens, improve the assembly stability of the optical lens, and further facilitate the miniaturization of the optical lens.

[0039] Therefore, satisfying the above two conditions is beneficial to achieving at least one of the following: large field of view, small head, small viewpoint depth, and high imaging quality. Attached Figure Description

[0040] Figure 1This is a schematic structural diagram of the optical lens according to Embodiment 1 of this application;

[0041] Figures 2 to 5 The diagrams shown in order are the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the optical lens in Embodiment 1 of this application.

[0042] Figure 6 This is a schematic structural diagram of the optical lens according to Embodiment 2 of this application;

[0043] Figures 7 to 10 The following are, in order, the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the optical lens of Embodiment 2 of this application;

[0044] Figure 11 This is a schematic structural diagram of the optical lens according to Embodiment 3 of this application;

[0045] Figures 12 to 15 The following are, in order, the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the optical lens of Embodiment 3 of this application;

[0046] Figure 16 This is a schematic structural diagram of the optical lens of Embodiment 4 of this application;

[0047] Figures 17 to 20 The following are, in order, the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the optical lens of Embodiment 4 of this application;

[0048] Figure 21 This is a schematic structural diagram of the optical lens of Embodiment 5 of this application;

[0049] Figures 22 to 25 The diagrams shown in order are the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the optical lens in Embodiment 5 of this application.

[0050] In the diagram: 100, optical lens; 11, first lens; 12, second lens; 13, third lens; 14, fourth lens; 15, fifth lens; 16, filter; 17, image sensor. Detailed Implementation

[0051] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0052] It should be noted that, for ease of understanding and description, the embodiments of this application define the representation of relevant parameters of the optical lens. For example, TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens; ImgH represents the maximum image height of the optical lens. The letter representations in similar definitions are merely illustrative, and other forms can also be used. This application does not impose any limitations on these representations.

[0053] It should also be noted that the units of the parameters involving ratios in the following formulas are consistent. For example, the unit of the numerator is millimeters (mm), and the unit of the denominator is also millimeters (mm).

[0054] It should also be noted that the sign of the radius of curvature indicates whether the optical surface is convex to the object side or the image side. When the optical surface (including the object side or the image side) is convex to the object side, the radius of curvature of the optical surface is positive; when the optical surface (including the object side or the image side) is convex to the image side, it is equivalent to the optical surface being concave to the object side, and the radius of curvature of the optical surface is negative.

[0055] It should also be noted that the shape of the lens and the degree of concavity and convexity of the object side and image side in the accompanying drawings are merely schematic and do not limit the embodiments of this application. In this application, the lens material can be resin, plastic, or glass. Lenses include spherical lenses and aspherical lenses. The lens can be a fixed focal length lens, a zoom lens, a standard lens, a short focal length lens, or a long focal length lens.

[0056] like Figure 1 As shown, the optical lens 100 of this embodiment includes five lenses. For ease of description, the left side of the optical lens 100 is defined as the object side (hereinafter also referred to as the object side), and the surface of the lens facing the object side can be called the object-side surface, which can also be understood as the surface of the lens close to the object side. The right side of the optical lens 100 is defined as the image side (hereinafter also referred to as the image side), and the surface of the lens facing the image side can be called the image-side surface, which can also be understood as the surface of the lens close to the image side. From the object side to the image side, the optical lens 100 of this embodiment includes, in sequence, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15; a stop aperture can also be provided on the first lens 11. An image sensor 17, such as a CCD or CMOS, can also be provided after the fifth lens 15. A filter 16, such as a flat infrared cut-off filter, can also be provided between the fifth lens 15 and the image sensor 17. The optical lens 100 will be described in detail below.

[0057] refer to Figure 1 , Figure 1 The dashed line is used to indicate the optical axis of the lens.

[0058] The optical lens 100 of this embodiment includes, from the object side to the image side, the following components in sequence:

[0059] First lens 11, second lens 12, third lens 13, fourth lens 14, and fifth lens 15.

[0060] It should be understood that the "various lenses of the optical lens" mentioned above refer to the lenses that make up the optical lens, which in this application embodiment are the first lens, the second lens, the third lens, the fourth lens, and the fifth lens.

[0061] Optionally, in the embodiments of this application,

[0062] The first lens 11 can have positive optical power. The object side S1 of the first lens 11 is convex near the optical axis, and the image side S2 of the first lens 11 is concave near the optical axis.

[0063] The second lens 12 can have positive optical power. The object side S3 of the second lens 12 is convex near the optical axis, and the image side S4 of the second lens 12 can be convex near the optical axis.

[0064] The third lens 13 can have negative optical power. The object side S5 of the third lens 13 is concave near the optical axis, and the image side S6 of the third lens 13 is convex near the optical axis.

[0065] The fourth lens 14 can have positive optical power. The object side S7 of the fourth lens 14 is convex near the optical axis, and the image side S8 of the fourth lens 14 is convex near the optical axis.

[0066] The fifth lens 15 can have negative optical power. The object side S9 of the fifth lens 15 is convex near the optical axis, and the image side S10 of the fifth lens 15 is concave near the optical axis.

[0067] The optical lens 100 satisfies the following relationship:

[0068] 3.430≤Tan(Semi-Fov) / CT1≤5.136;

[0069] 7.657≤(ET3+ET4) / T34≤30.002;

[0070] Tan(Semi-Fov) / CT1 can be 3.430, 3.812, 4.192, 4.264, or 5.136. By reasonably allocating the ratio of half the tangent of the maximum field of view of the optical lens to the center thickness of the first lens on the optical axis within a reasonable range, it is beneficial to reduce stray light generated in the first lens and improve the imaging quality of the optical lens. At the same time, it is beneficial to meet the characteristics of small depth of view, while also having wide-angle characteristics, which facilitates the miniaturization of the optical lens.

[0071] (ET3+ET4) / T34 can be 7.657, 18.361, 25.233, 29.980, or 30.002. By reasonably allocating the sum of the edge thickness of the third lens and the edge thickness of the fourth lens, and on this basis constraining the ratio of its distance from the third lens to the distance between the third lens and the fourth lens on the optical axis to a reasonable range, it is beneficial to make the structure of the optical lens more compact, shorten the total length of the optical lens, improve the assembly stability of the optical lens, and further facilitate the miniaturization of the optical lens.

[0072] Therefore, satisfying the above two conditions is beneficial to achieving at least one of the following: large field of view, small head, small viewpoint depth, and high imaging quality.

[0073] In some implementations of the first aspect, the optical lens satisfies: 1.181 ≤ f / R11 ≤ 1.585; f / R11 can be 1.181, 1.262, 1.405, 1.477, or 1.585. By reasonably allocating the ratio of the total effective focal length of the optical lens to the radius of curvature of the object side of the first lens within a reasonable range, it is beneficial to correct the system chromatic aberration of the optical lens, improve astigmatism and distortion, and better improve the imaging quality of the optical lens.

[0074] In some implementations of the first aspect, the optical lens satisfies: 0.970 ≤ f345 / (f23-f34) ≤ 0.996;

[0075] f345 / (f23-f34) can be 0.970, 0.981, 0.983, 0.992, or 0.996. By reasonably allocating the combined focal length of the second and third lenses to the sum of the combined focal lengths of the third and fourth lenses, and constraining the ratio of the combined focal length of the third and fourth lenses to this sum within a reasonable range, it is beneficial to reduce the sensitivity of the processing technology, improve the imaging quality of the optical lens, and increase the production yield of the optical lens.

[0076] In some implementations of the first aspect, the optical lens satisfies: 11.326 ≤ (DT11+DT12) / (SAG11-SAG12) ≤ 29.998; (DT11+DT12) / (SAG11-SAG12) can be 11.326, 14.876, 15.841, 17.164, or 29.998. By reasonably allocating the sum of the maximum effective radius of the object side of the first lens and the maximum effective radius of the image side of the first lens, and simultaneously limiting the difference between the sag value SG of the object side of the first lens corresponding to the maximum field of view of the optical lens and the sag value SG of the image side of the first lens corresponding to the maximum field of view of the optical lens, the ratio of the two is constrained to a reasonable range, which is beneficial to improve the stray light generated by reflection entering the first lens, reduce the sensitivity of the optical lens system, and thus improve the imaging quality of the optical lens.

[0077] In some implementations of the first aspect, the optical lens satisfies: -2.696 ≤ (R41 - R42) / f3 ≤ -2.230;

[0078] (R41-R42) / f3 can be -2.696, -2.612, -2.588, -2.508, or -2.230. By reasonably allocating the sum of the curvature radius of the object side and the image side of the fourth lens, and constraining its ratio with the effective focal length of the third lens within a reasonable range, it is beneficial to further expand the field of view and realize the wide-angle characteristics of the optical lens. At the same time, the edge of the object side of the fourth lens of the optical lens forms a recurved structure, which is beneficial to improve the system chromatic aberration of the optical lens, astigmatism and distortion, and improve the edge resolution of the optical lens, thereby further improving the imaging quality of the optical lens.

[0079] In some implementations of the first aspect, the optical lens satisfies: 0.608 ≤ N3 / (CT2+CT4) ≤ 2.689; N3 / (CT2+CT4) can be 0.608, 1.271, 1.670, 1.871, or 2.689. By reasonably allocating the sum of the center thickness of the second lens and the center thickness of the fourth lens on the optical axis, and on this basis constraining the ratio of the refractive index of the third lens to that of the fourth lens within a reasonable range, it is beneficial to improve the astigmatism and distortion of the optical lens and enhance the imaging quality of the optical lens; at the same time, it is beneficial to improve the transverse chromatic aberration of the optical lens and enhance the resolving power of the optical lens.

[0080] In some implementations of the first aspect, the optical lens satisfies: -0.500≤(SAG51+SAG52) / ET5≤0.373;

[0081] (SAG51+SAG52) / ET5 can be -0.500, -0.303, 0.109, 0.236, or 0.373. By reasonably allocating the sum of the sag value SG of the object side of the fifth lens corresponding to the maximum field of view of the optical lens and the sag value SG of the image side of the fifth lens corresponding to the maximum field of view of the optical lens, and on this basis constraining the ratio of it to the edge thickness of the fifth lens within a reasonable range, it is beneficial to improve the processing characteristics of the fifth lens, while facilitating the assembly stability of the fifth lens, making the overall structure of the optical lens more compact, and thus improving the yield in the lens production process.

[0082] In some implementations of the first aspect, the optical lens satisfies: 2.239 ≤ ImgH / (T12+T23) ≤ 8.772; ImgH / (T12+T23) can be 2.239, 4.026, 4.690, 6.812, or 8.772. By reasonably allocating the sum of the air gap distance between the first lens and the second lens on the optical axis and the air gap distance between the second lens and the third lens on the optical axis, the ratio of the maximum image height of the optical lens to this distance is constrained to be within a reasonable range. This is beneficial for improving the ghosting caused by reflection between the first lens and the second lens, thereby improving the imaging quality of the optical lens. At the same time, it is beneficial for shortening the total optical length, further facilitating the miniaturization of the optical lens.

[0083] In a second aspect, an optical lens module is provided, including an optical lens in any possible implementation of the first aspect, and may also include an image sensor, an analog-to-digital converter, an image processor, and a memory, to realize the imaging function of the optical lens.

[0084] The following will combine Figures 1 to 25 Some specific, but not limiting, examples of embodiments of this application are described in more detail.

[0085] It should be noted that the embodiments of this application do not specifically limit the material of each lens of the optical lens 100.

[0086] Example 1

[0087] An embodiment of this application's optical lens 100 includes, from the object side to the image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15, as follows: Figure 1 As shown.

[0088] For ease of description, in the following embodiments, Stop represents the surface of the aperture stop, S1 represents the object-side surface of the first lens 11, S2 represents the image-side surface of the first lens 11, S3 represents the object-side surface of the second lens 12, S4 represents the image-side surface of the second lens 12, S5 represents the object-side surface of the third lens 13, S6 represents the image-side surface of the third lens 13, S7 represents the object-side surface of the fourth lens 14, S8 represents the image-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, S10 represents the image-side surface of the fifth lens 15, S11 represents the object-side surface of the filter, S12 represents the image-side surface of the filter, and S13 represents the imaging surface. The first lens 11 has positive optical power, and its object-side surface S1 is convex near the optical axis; its image-side surface S2 is concave near the optical axis. The second lens 12 has positive optical power, and its object-side surface S3 is convex near the optical axis; its image-side surface S4 is also convex near the optical axis. The third lens 13 has negative optical power, and its object-side surface S5 is concave near the optical axis; its image-side surface S6 is convex near the optical axis. The fourth lens 14 has positive optical power, and its object-side surface S7 is convex near the optical axis; its image-side surface S8 is convex near the optical axis. The fifth lens 15 has negative optical power, and its object-side surface S9 is convex near the optical axis; its image-side surface S10 is concave near the optical axis.

[0089] Let TTL represent the total optical length of optical lens 100, ImgH represent the maximum image height of optical lens 100, and EFL represent the effective focal length of optical lens 100. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, 14, 16, 18, 20, and K represent the cone coefficient.

[0090] Based on the above relationships, Table 1 shows the effective focal length (EFL), maximum field of view (Fov), total optical length (TTL), aperture (F.No.), surface type, radius of curvature, thickness, material refractive index, and conic coefficient of the optical lens 100 in Embodiment 1. The units for radius of curvature and thickness are millimeters (mm), as shown in Table 1.

[0091] Table 1

[0092]

[0093] Table 2 shows the aspherical coefficients of the optical lens 100 of Embodiment 1 of this application, as shown in Table 2:

[0094] Table 2

[0095] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.188E-01 -1.041E+00 5.986E+00 -3.224E+01 9.084E+01 -1.336E+02 8.313E+01 0.000E+00 0.000E+00 S2 -3.278E-01 7.111E-01 -1.923E+01 1.452E+02 -6.303E+02 1.458E+03 -1.405E+03 0.000E+00 0.000E+00 S3 -5.537E-02 -4.711E-02 -2.372E+00 1.186E+01 -3.519E+01 5.587E+01 -4.129E+01 0.000E+00 0.000E+00 S4 -1.051E+00 4.674E+00 -1.923E+01 4.891E+01 -7.747E+01 6.659E+01 -2.615E+01 0.000E+00 0.000E+00 S5 1.698E-01 -1.774E-01 6.285E-01 -1.030E+00 3.351E+00 -4.968E+00 3.692E+00 0.000E+00 0.000E+00 S6 -3.029E-01 6.216E-01 -1.139E+00 1.786E+00 -1.135E+00 2.361E-01 4.939E-02 0.000E+00 0.000E+00 S7 -2.203E-02 5.538E-02 -8.287E-02 4.757E-02 -1.492E-02 2.191E-03 -1.033E-04 6.582E-06 3.693E-06 S8 3.102E-01 -1.379E-01 -1.830E-02 4.004E-02 -1.572E-02 1.656E-03 5.722E-04 -1.840E-04 1.460E-05 S9 -3.048E-01 1.794E-01 -1.059E-01 4.668E-02 -1.304E-02 1.310E-03 4.126E-04 -1.416E-04 1.226E-05 S10 -5.984E-02 6.155E-03 3.741E-03 -2.113E-03 3.245E-04 1.187E-05 -6.493E-06 2.961E-07 1.265E-08

[0096] Among them, the non-curved surfaces of each lens of the camera optical mirror 100 satisfy:

[0097]

[0098] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 1 above); k is the conic constant (given in Table 1 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each lens surface S1-S10 are shown in Table 2.

[0099] It should be understood that the aspherical surfaces of each lens in the optical lens 100 can use the aspherical surface shown in the above aspherical surface formula, or other aspherical surface formulas, and this application does not limit them.

[0100] The above provides design data for the optical lens 100 of Embodiment 1 of this application, which has an effective focal length (EFL) of 2.518 mm, a maximum field of view (Fov) of 98.443 degrees, a total optical length (TTL) of 3.788 mm, and an aperture (F.No.) of 2.362.

[0101] In one embodiment provided in this application, Tan(Semi-Fov) / CT1 = 5.136.

[0102] In one embodiment provided in this application, (ET3+ET4) / T34 = 25.233.

[0103] In one embodiment provided in this application, f / R11 = 1.181.

[0104] In one embodiment provided in this application, f345 / (f23-f34) = 0.996.

[0105] In one embodiment provided in this application, (DT11+DT12) / (SAG11-SAG12)=29.998.

[0106] In one embodiment provided in this application, (R41-R42) / f3 = -2.612.

[0107] In one embodiment provided in this application, N3 / (CT2+CT4) = 1.670.

[0108] In one embodiment provided in this application, (SAG51+SAG52) / ET5=0.109.

[0109] In one embodiment provided in this application, ImgH / (T12+T23)=4.690.

[0110] Figures 2 to 5 The optical performance of an optical lens 100 designed with the lens combination method of Embodiment 1 is described.

[0111] In Example 1, the optical lens meets the requirements of small head size, wide-angle characteristics, shallow depth of view, and high imaging quality.

[0112] Example 2

[0113] An embodiment of this application's optical lens 100 includes, from the object side to the image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15, as follows: Figure 6 As shown.

[0114] For ease of description, in the following embodiments, Stop represents the surface of the aperture stop, S1 represents the object-side surface of the first lens 11, S2 represents the image-side surface of the first lens 11, S3 represents the object-side surface of the second lens 12, S4 represents the image-side surface of the second lens 12, S5 represents the object-side surface of the third lens 13, S6 represents the image-side surface of the third lens 13, S7 represents the object-side surface of the fourth lens 14, S8 represents the image-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, S10 represents the image-side surface of the fifth lens 15, S11 represents the object-side surface of the filter, S12 represents the image-side surface of the filter, and S13 represents the imaging surface. The first lens 11 has positive optical power, and its object-side surface S1 is convex near the optical axis; its image-side surface S2 is concave near the optical axis. The second lens 12 has positive optical power, and its object-side surface S3 is concave near the optical axis; its image-side surface S4 is convex near the optical axis. The third lens 13 has negative optical power, and its object-side surface S5 is concave near the optical axis; its image-side surface S6 is convex near the optical axis. The fourth lens 14 has positive optical power, and its object-side surface S7 is convex near the optical axis; its image-side surface S8 is convex near the optical axis. The fifth lens 15 has negative optical power, and its object-side surface S9 is convex near the optical axis; its image-side surface S10 is concave near the optical axis.

[0115] Let TTL represent the total optical length of optical lens 100, ImgH represent the maximum image height of optical lens 100, and EFL represent the effective focal length of optical lens 100. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, 14, 16, 18, 20, and K represent the cone coefficient.

[0116] Based on the above relationships, Table 3 shows the effective focal length (EFL), maximum field of view (Fov), total optical length (TTL), aperture (F.No.), surface type, radius of curvature, thickness, material refractive index, and conic coefficient of the optical lens 100 in Embodiment 2. The units for radius of curvature and thickness are millimeters (mm), as shown in Table 3.

[0117] Table 3

[0118]

[0119] Table 4 shows the aspherical coefficients of the optical lens 100 in Embodiment 2 of this application, as shown in Table 4:

[0120] Table 4

[0121] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -2.896E-02 -9.585E-01 6.334E+00 -3.291E+01 9.010E+01 -1.303E+02 7.651E+01 0.000E+00 0.000E+00 S2 -2.692E-01 9.259E-01 -1.882E+01 1.419E+02 -6.332E+02 1.486E+03 -1.443E+03 0.000E+00 0.000E+00 S3 -2.420E-01 -1.656E-01 -1.799E+00 1.077E+01 -3.785E+01 5.549E+01 -1.950E+01 0.000E+00 0.000E+00 S4 -1.108E+00 4.575E+00 -1.906E+01 4.903E+01 -7.778E+01 6.757E+01 -2.254E+01 0.000E+00 0.000E+00 S5 3.994E-01 -3.048E-01 5.819E-01 -8.825E-01 3.750E+00 -5.040E+00 1.900E+00 0.000E+00 0.000E+00 S6 -2.739E-01 6.953E-01 -1.133E+00 1.766E+00 -1.197E+00 1.739E-01 8.239E-02 0.000E+00 0.000E+00 S7 3.114E-02 5.263E-02 -8.585E-02 4.785E-02 -1.468E-02 2.187E-03 -9.676E-05 1.023E-05 -3.409E-06 S8 3.268E-01 -1.398E-01 -1.861E-02 4.001E-02 -1.570E-02 1.659E-03 5.720E-04 -1.838E-04 1.510E-05 S9 -3.043E-01 1.831E-01 -1.051E-01 4.657E-02 -1.309E-02 1.315E-03 4.146E-04 -1.415E-04 1.216E-05 S10 -5.984E-02 6.155E-03 3.741E-03 -2.113E-03 3.245E-04 1.187E-05 -6.493E-06 2.961E-07 1.265E-08

[0122] Among them, the non-curved surfaces of each lens of the camera optical mirror 100 satisfy:

[0123]

[0124] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 3 above); k is the conic constant (given in Table 3 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each lens surface S1-S10 are shown in Table 4.

[0125] It should be understood that the aspherical surfaces of each lens in the optical lens 100 can use the aspherical surface shown in the above aspherical surface formula, or other aspherical surface formulas, and this application does not limit them.

[0126] The above provides design data for the optical lens 100 of Embodiment 2 of this application, with an effective focal length (EFL) of 2.660 mm, a maximum field of view (Fov) of 95.322 degrees, a total optical length (TTL) of 3.799 mm, and an aperture (F.No.) of 2.471.

[0127] In one embodiment provided in this application, Tan(Semi-Fov) / CT1 = 4.192.

[0128] In one embodiment provided in this application, (ET3+ET4) / T34 = 7.657.

[0129] In one embodiment provided in this application, f / R11 = 1.477.

[0130] In one embodiment provided in this application, f345 / (f23-f34) = 0.983.

[0131] In one embodiment provided in this application, (DT11+DT12) / (SAG11-SAG12)=15.841.

[0132] In one embodiment provided in this application, (R41-R42) / f3 = -2.696.

[0133] In one embodiment provided in this application, N3 / (CT2+CT4)=2.689.

[0134] In one embodiment provided in this application, (SAG51+SAG52) / ET5=0.373.

[0135] In one embodiment provided in this application, ImgH / (T12+T23)=4.026.

[0136] Figures 7 to 10 The optical performance of the optical lens 100 designed with the lens combination method of Embodiment 2 is described.

[0137] In Example 2, the optical lens meets the requirements of small head size, wide-angle characteristics, shallow depth of view, and high imaging quality.

[0138] Example 3

[0139] An embodiment of this application's optical lens 100 includes, from the object side to the image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15, as follows: Figure 11 As shown.

[0140] For ease of description, in the following embodiments, Stop represents the surface of the aperture stop, S1 represents the object-side surface of the first lens 11, S2 represents the image-side surface of the first lens 11, S3 represents the object-side surface of the second lens 12, S4 represents the image-side surface of the second lens 12, S5 represents the object-side surface of the third lens 13, S6 represents the image-side surface of the third lens 13, S7 represents the object-side surface of the fourth lens 14, S8 represents the image-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, S10 represents the image-side surface of the fifth lens 15, S11 represents the object-side surface of the filter, S12 represents the image-side surface of the filter, and S13 represents the imaging surface. The first lens 11 has positive optical power, and its object-side surface S1 is convex near the optical axis; its image-side surface S2 is concave near the optical axis. The second lens 12 has positive optical power, and its object-side surface S3 is concave near the optical axis; its image-side surface S4 is convex near the optical axis. The third lens 13 has negative optical power, and its object-side surface S5 is concave near the optical axis; its image-side surface S6 is concave near the optical axis. The fourth lens 14 has positive optical power, and its object-side surface S7 is convex near the optical axis; its image-side surface S8 is convex near the optical axis. The fifth lens 15 has negative optical power, and its object-side surface S9 is convex near the optical axis; its image-side surface S10 is concave near the optical axis.

[0141] Let TTL represent the total optical length of optical lens 100, ImgH represent the maximum image height of optical lens 100, and EFL represent the effective focal length of optical lens 100. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, 14, 16, 18, 20, and K represent the cone coefficient.

[0142] Based on the above relationships, Table 5 shows the effective focal length (EFL), maximum field of view (Fov), total optical length (TTL), aperture (F.No.), surface type, radius of curvature, thickness, material refractive index, and conic coefficient of the optical lens 100 in Embodiment 3. The units for radius of curvature and thickness are millimeters (mm), as shown in Table 5.

[0143] Table 5

[0144]

[0145] Table 6 shows the aspherical coefficients of the optical lens 100 of Embodiment 3 of this application, as shown in Table 6:

[0146] Table 6

[0147] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 6.616E-02 -6.386E-01 6.047E+00 -3.210E+01 9.222E+01 -1.326E+02 7.235E+01 0.000E+00 0.000E+00 S2 -8.263E-03 1.145E+00 -1.952E+01 1.452E+02 -6.304E+02 1.453E+03 -1.446E+03 0.000E+00 0.000E+00 S3 -9.972E-02 3.446E-01 -3.568E+00 1.053E+01 -2.901E+01 7.736E+01 -1.420E+02 0.000E+00 0.000E+00 S4 -1.192E+00 4.825E+00 -1.909E+01 4.887E+01 -7.745E+01 6.751E+01 -2.445E+01 0.000E+00 0.000E+00 S5 1.039E-01 -1.327E-02 5.048E-01 -1.021E+00 3.728E+00 -4.763E+00 2.329E+00 0.000E+00 0.000E+00 S6 -2.545E-01 5.814E-01 -1.125E+00 1.777E+00 -1.183E+00 1.830E-01 6.921E-02 0.000E+00 0.000E+00 S7 -4.338E-02 4.711E-02 -7.487E-02 4.935E-02 -1.531E-02 1.884E-03 -2.549E-04 -7.900E-06 1.103E-05 S8 2.211E-01 -1.090E-01 -1.885E-02 3.932E-02 -1.581E-02 1.666E-03 5.784E-04 -1.825E-04 1.497E-05 S9 -2.642E-01 1.627E-01 -1.072E-01 4.672E-02 -1.298E-02 1.325E-03 4.155E-04 -1.413E-04 1.216E-05 S10 -5.984E-02 6.155E-03 3.741E-03 -2.113E-03 3.245E-04 1.187E-05 -6.493E-06 2.961E-07 1.265E-08

[0148] Among them, the non-curved surfaces of each lens of the camera optical mirror 100 satisfy:

[0149]

[0150] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 5 above); k is the conic constant (given in Table 5 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each lens surface S1-S10 are shown in Table 6.

[0151] It should be understood that the aspherical surfaces of each lens in the optical lens 100 can use the aspherical surface shown in the above aspherical surface formula, or other aspherical surface formulas, and this application does not limit them.

[0152] The above provides design data for the optical lens 100 of Embodiment 3 of this application, with an effective focal length (EFL) of 2.895 mm, a maximum field of view (Fov) of 90.456 degrees, a total optical length (TTL) of 5.199 mm, and an aperture (F.No.) of 2.595.

[0153] In one embodiment provided in this application, Tan(Semi-Fov) / CT1 = 3.430.

[0154] In one embodiment provided in this application, (ET3+ET4) / T34=30.002.

[0155] In one embodiment provided in this application, f / R11 = 1.405.

[0156] In one embodiment provided in this application, f345 / (f23-f34) = 0.981.

[0157] In one embodiment provided in this application, (DT11+DT12) / (SAG11-SAG12)=11.326.

[0158] In one embodiment provided in this application, (R41-R42) / f3 = -2.588.

[0159] In one embodiment provided in this application, N3 / (CT2+CT4)=0.608.

[0160] In one embodiment provided in this application, (SAG51+SAG52) / ET5=-0.500.

[0161] In one embodiment provided in this application, ImgH / (T12+T23)=6.812.

[0162] Figures 12 to 15 The optical performance of the optical lens 100 designed with the lens combination method of Embodiment 3 is described.

[0163] In Example 3, the optical lens meets the requirements of small head size, wide-angle characteristics, shallow depth of view, and high imaging quality.

[0164] Example 4

[0165] An embodiment of this application's optical lens 100 includes, from the object side to the image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15, as follows: Figure 16 As shown.

[0166] For ease of description, in the following embodiments, Stop represents the surface of the aperture stop, S1 represents the object-side surface of the first lens 11, S2 represents the image-side surface of the first lens 11, S3 represents the object-side surface of the second lens 12, S4 represents the image-side surface of the second lens 12, S5 represents the object-side surface of the third lens 13, S6 represents the image-side surface of the third lens 13, S7 represents the object-side surface of the fourth lens 14, S8 represents the image-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, S10 represents the image-side surface of the fifth lens 15, S11 represents the object-side surface of the filter, S12 represents the image-side surface of the filter, and S13 represents the imaging surface. The first lens 11 has positive optical power, and its object-side surface S1 is convex near the optical axis; its image-side surface S2 is concave near the optical axis. The second lens 12 has positive optical power, and its object-side surface S3 is convex near the optical axis; its image-side surface S4 is also convex near the optical axis. The third lens 13 has negative optical power, and its object-side surface S5 is concave near the optical axis; its image-side surface S6 is convex near the optical axis. The fourth lens 14 has positive optical power, and its object-side surface S7 is convex near the optical axis; its image-side surface S8 is convex near the optical axis. The fifth lens 15 has negative optical power, and its object-side surface S9 is convex near the optical axis; its image-side surface S10 is concave near the optical axis.

[0167] Let TTL represent the total optical length of optical lens 100, ImgH represent the maximum image height of optical lens 100, and EFL represent the effective focal length of optical lens 100. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, 14, 16, 18, 20, and K represent the cone coefficient.

[0168] Based on the above relationships, Table 7 shows the effective focal length (EFL), maximum field of view (Fov), total optical length (TTL), aperture (F.No.), surface type, radius of curvature, thickness, material refractive index, and conic coefficient of the optical lens 100 in Embodiment 4. The units for radius of curvature and thickness are millimeters (mm), as shown in Table 7.

[0169] Table 7

[0170]

[0171] Table 8 shows the aspherical coefficients of the optical lens 100 of Embodiment 4 of this application, as shown in Table 8:

[0172] Table 8

[0173] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.197E-02 -8.928E-01 6.553E+00 -3.251E+01 8.890E+01 -1.302E+02 7.607E+01 0.000E+00 0.000E+00 S2 -2.419E-01 1.050E+00 -1.974E+01 1.453E+02 -6.330E+02 1.450E+03 -1.375E+03 0.000E+00 0.000E+00 S3 -1.445E-01 1.441E-02 -2.114E+00 1.250E+01 -5.131E+01 1.027E+02 -7.528E+01 0.000E+00 0.000E+00 S4 -1.051E+00 4.690E+00 -1.894E+01 4.802E+01 -7.639E+01 6.878E+01 -2.601E+01 0.000E+00 0.000E+00 S5 2.371E-01 -6.204E-02 1.544E-02 -6.545E-01 3.293E+00 -3.500E+00 1.100E+00 0.000E+00 0.000E+00 S6 -2.661E-01 6.787E-01 -1.158E+00 1.732E+00 -1.175E+00 1.805E-01 7.841E-02 0.000E+00 0.000E+00 S7 -1.876E-02 5.203E-02 -8.641E-02 4.720E-02 -1.545E-02 1.922E-03 1.581E-04 1.656E-04 -1.341E-04 S8 3.013E-01 -1.426E-01 -1.746E-02 4.019E-02 -1.576E-02 1.641E-03 5.697E-04 -1.844E-04 1.537E-05 S9 -2.902E-01 1.676E-01 -1.039E-01 4.676E-02 -1.310E-02 1.303E-03 4.179E-04 -1.400E-04 1.148E-05 S10 -5.984E-02 6.155E-03 3.741E-03 -2.113E-03 3.245E-04 1.187E-05 -6.493E-06 2.961E-07 1.265E-08

[0174] Among them, the non-curved surfaces of each lens of the camera optical mirror 100 satisfy:

[0175]

[0176] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 7 above); k is the conic constant (given in Table 7 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each lens surface S1-S10 are shown in Table 8.

[0177] It should be understood that the aspherical surfaces of each lens in the optical lens 100 can use the aspherical surface shown in the above aspherical surface formula, or other aspherical surface formulas, and this application does not limit them.

[0178] The above provides design data for the optical lens 100 of Embodiment 4 of this application, with an effective focal length (EFL) of 2.487 mm, a maximum field of view (Fov) of 99.157 degrees, a total optical length (TTL) of 3.954 mm, and an aperture (F.No.) of 2.281.

[0179] In one embodiment provided in this application, Tan(Semi-Fov) / CT1 = 4.264.

[0180] In one embodiment provided in this application, (ET3+ET4) / T34 = 29.980.

[0181] In one embodiment provided in this application, f / R11 = 1.262.

[0182] In one embodiment provided in this application, f345 / (f23-f34) = 0.970.

[0183] In one embodiment provided in this application, (DT11+DT12) / (SAG11-SAG12)=14.876.

[0184] In one embodiment provided in this application, (R41-R42) / f3 = -2.230.

[0185] In one embodiment provided in this application, N3 / (CT2+CT4)=1.271.

[0186] In one embodiment provided in this application, (SAG51+SAG52) / ET5=0.236.

[0187] In one embodiment provided in this application, ImgH / (T12+T23)=8.772.

[0188] Figures 17 to 20 The optical performance of an optical lens 100 designed with the lens combination method of Embodiment 4 is described.

[0189] In Example 4, the optical lens meets the requirements of small head size, wide-angle characteristics, shallow depth of view, and high imaging quality.

[0190] Example 5

[0191] An embodiment of this application's optical lens 100 includes, from the object side to the image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15, as follows: Figure 21 As shown.

[0192] For ease of description, in the following embodiments, Stop represents the surface of the aperture stop, S1 represents the object-side surface of the first lens 11, S2 represents the image-side surface of the first lens 11, S3 represents the object-side surface of the second lens 12, S4 represents the image-side surface of the second lens 12, S5 represents the object-side surface of the third lens 13, S6 represents the image-side surface of the third lens 13, S7 represents the object-side surface of the fourth lens 14, S8 represents the image-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, S10 represents the image-side surface of the fifth lens 15, S11 represents the object-side surface of the filter, S12 represents the image-side surface of the filter, and S13 represents the imaging surface. The first lens 11 has positive optical power, and its object-side surface S1 is convex near the optical axis; its image-side surface S2 is concave near the optical axis. The second lens 12 has positive optical power, and its object-side surface S3 is concave near the optical axis; its image-side surface S4 is convex near the optical axis. The third lens 13 has negative optical power, and its object-side surface S5 is concave near the optical axis; its image-side surface S6 is convex near the optical axis. The fourth lens 14 has positive optical power, and its object-side surface S7 is concave near the optical axis; its image-side surface S8 is convex near the optical axis. The fifth lens 15 has negative optical power, and its object-side surface S9 is convex near the optical axis; its image-side surface S10 is concave near the optical axis.

[0193] Let TTL represent the total optical length of optical lens 100, ImgH represent the maximum image height of optical lens 100, and EFL represent the effective focal length of optical lens 100. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, 14, 16, 18, 20, and K represent the cone coefficient.

[0194] Based on the above relationships, Table 9 shows the effective focal length (EFL), maximum field of view (Fov), total optical length (TTL), aperture (F.No.), surface type, radius of curvature, thickness, material refractive index, and conic coefficient of the optical lens 100 in Embodiment 5. The units for radius of curvature and thickness are millimeters (mm), as shown in Table 9.

[0195] Table 9

[0196]

[0197] Table 10 shows the aspherical coefficients of the optical lens 100 of Embodiment 5 of this application, as shown in Table 10:

[0198] Table 10

[0199] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -5.163E-02 -9.965E-01 6.307E+00 -3.257E+01 8.920E+01 -1.296E+02 7.667E+01 0.000E+00 0.000E+00 S2 -3.188E-01 1.074E+00 -1.983E+01 1.462E+02 -6.319E+02 1.431E+03 -1.330E+03 0.000E+00 0.000E+00 S3 -3.469E-01 -2.909E-01 -1.773E+00 1.161E+01 -3.780E+01 5.227E+01 -2.129E+01 0.000E+00 0.000E+00 S4 -1.181E+00 4.564E+00 -1.905E+01 4.885E+01 -7.751E+01 6.755E+01 -2.332E+01 0.000E+00 0.000E+00 S5 -9.220E-02 -3.418E-01 5.730E-01 -7.991E-01 3.814E+00 -4.948E+00 2.043E+00 0.000E+00 0.000E+00 S6 -5.271E-01 6.257E-01 -1.106E+00 1.779E+00 -1.187E+00 1.798E-01 6.845E-02 0.000E+00 0.000E+00 S7 -1.039E-02 5.519E-02 -8.356E-02 4.720E-02 -1.487E-02 2.217E-03 -8.327E-05 8.973E-06 -3.632E-06 S8 3.088E-01 -1.403E-01 -1.826E-02 4.000E-02 -1.574E-02 1.655E-03 5.745E-04 -1.831E-04 1.497E-05 S9 -3.280E-01 1.987E-01 -1.084E-01 4.589E-02 -1.305E-02 1.339E-03 4.201E-04 -1.407E-04 1.183E-05 S10 -5.984E-02 6.155E-03 3.741E-03 -2.113E-03 3.245E-04 1.187E-05 -6.493E-06 2.961E-07 1.265E-08

[0200] Among them, the non-curved surfaces of each lens of the camera optical mirror 100 satisfy:

[0201]

[0202] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 9 above); k is the conic constant (given in Table 9 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each lens surface S1-S10 are shown in Table 10.

[0203] It should be understood that the aspherical surfaces of each lens in the optical lens 100 can use the aspherical surface shown in the above aspherical surface formula, or other aspherical surface formulas, and this application does not limit them.

[0204] The above provides design data for the optical lens 100 of Embodiment 5 of this application, with an effective focal length (EFL) of 2.945 mm, a maximum field of view (Fov) of 89.449 degrees, a total optical length (TTL) of 4.218 mm, and an aperture (F.No.) of 2.719.

[0205] In one embodiment provided in this application, Tan(Semi-Fov) / CT1 = 3.812.

[0206] In one embodiment provided in this application, (ET3+ET4) / T34=18.361.

[0207] In one embodiment provided in this application, f / R11 = 1.585.

[0208] In one embodiment provided in this application, f345 / (f23-f34) = 0.992.

[0209] In one embodiment provided in this application, (DT11+DT12) / (SAG11-SAG12)=17.164.

[0210] In one embodiment provided in this application, (R41-R42) / f3 = -2.508.

[0211] In one embodiment provided in this application, N3 / (CT2+CT4)=1.871.

[0212] In one embodiment provided in this application, (SAG51+SAG52) / ET5=-0.303.

[0213] In one embodiment provided in this application, ImgH / (T12+T23)=2.239.

[0214] Figures 22 to 25 The optical performance of an optical lens 100 designed with the lens combination method of Embodiment 5 is described.

[0215] In Example 5, the optical lens meets the requirements of small head size, wide-angle characteristics, shallow depth of view, and high imaging quality.

[0216] In addition, the Tan(Semi-Fov) / CT1 ratio, (ET3+ET4) / T34 ratio, f / R11 ratio, f345 / (f23-f34) ratio, (DT11+DT12) / (SAG11-SAG12) ratio, (R41-R42) / f3 ratio, N3 / (CT2+CT4) ratio, (SAG51+SAG52) / ET5 ratio, and ImgH / (T12+T23) ratio corresponding to Examples 1 to 5 are shown in Table 11:

[0217] Table 11

[0218]

[0219] This invention has been described by way of preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. The invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of the invention.

Claims

1. A small-head wide-angle optical lens, characterized in that, Along the optical axis from the object side to the image side, the following are included in sequence: A first lens with positive optical power; its object-side surface is convex near the optical axis; A second lens with positive optical power; its image-side surface is convex near the optical axis. The third lens with negative optical power has a convex image-side surface near the optical axis; A fourth lens with positive optical power, the object-side surface of which is convex near the optical axis; and A fifth lens with negative optical power; The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are all aspherical lenses, and the optical lens has 5 lenses with optical power. The optical lens satisfies the following condition: 3.430mm -1 ≤Tan(Semi-Fov) / CT1≤5.136mm -1 ; 7.657≤(ET3+ET4) / T34≤30.002; 1.181≤f / R11≤1.585; 0.970≤f345 / (f23-f34)≤0.996; 11.326≤(DT11+DT12) / (SAG11-SAG12)≤29.998; -2.696≤(R41-R42) / f3≤-2.230; 0.608mm -1 ≤N3 / (CT2+CT4)≤2.689mm -1 ; Wherein, Semi-Fov is half of the maximum field of view of the optical lens; CT1 is the center thickness of the first lens on the optical axis; ET3 is the edge thickness of the third lens; ET4 is the edge thickness of the fourth lens; T34 is the distance between the third and fourth lenses on the optical axis; f is the total effective focal length of the optical lens; R11 is the radius of curvature of the object side of the first lens; f345 is the combined focal length of the third, fourth, and fifth lenses; f23 is the combined focal length of the second and third lenses; f34 is the combined focal length of the third and fourth lenses; DT11 DT11 is the maximum effective radius of the object-side surface of the first lens; DT12 is the maximum effective radius of the image-side surface of the first lens; SAG11 is the sagitta (SG) value of the object-side surface of the first lens corresponding to the maximum field of view of the optical lens; SAG12 is the sagitta (SG) value of the image-side surface of the first lens corresponding to the maximum field of view of the optical lens; R41 is the radius of curvature of the object-side surface of the fourth lens; R42 is the radius of curvature of the image-side surface of the fourth lens; f3 is the effective focal length of the third lens; N3 is the refractive index of the third lens; CT2 is the center thickness of the second lens on the optical axis; CT4 is the center thickness of the fourth lens.

2. The small-head wide-angle optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: -0.500≤(SAG51+SAG52) / ET5≤0.373; Wherein, SAG51 is the sagitta SG value of the object side of the fifth lens corresponding to the maximum field of view of the optical lens; SAG52 is the sagitta SG value of the image side of the fifth lens corresponding to the maximum field of view of the optical lens; and ET5 is the edge thickness of the fifth lens.

3. The small-head wide-angle optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 2.239≤ImgH / (T12+T23)≤8.772; Wherein, ImgH is the maximum image height of the optical lens, T12 is the air gap distance between the first lens and the second lens on the optical axis, and T23 is the air gap distance between the second lens and the third lens on the optical axis.

4. An optical lens module, characterized in that, Including the small-head wide-angle optical lens as described in any one of claims 1 to 3.

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