Large-target-surface industrial lens and industrial lens module

Abstract

The invention discloses a large-target-surface industrial lens and an industrial lens module, and belongs to the technical field of optical imaging, and the large-target-surface industrial lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis, the second lens has positive focal power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; the large-target-surface industrial lens satisfies the following conditional expressions: ImgH / (SAG11-SAG12) is greater than or equal to-12.001 and less than or equal to-5.309; tTL / EPD is greater than or equal to 3.934 and less than or equal to 5.367. According to the combined configuration of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens, the illumination of the large-target-surface industrial lens is better improved, so that the large-aperture and large-target-surface requirements of the large-target-surface industrial lens are favorably realized, and the imaging quality of the large-target-surface industrial lens is also favorably improved.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to a large-surface industrial lens and an industrial lens module. Background Art

[0002] Industrial lenses, also known as industrial camera lenses or machine vision lenses, are high-quality optical lenses designed for industrial automation, machine vision, inspection and measurement applications. Compared with ordinary camera lenses, industrial lenses have higher precision, resolution and stability, and can meet the strict requirements for imaging quality and reliability in industrial applications. However, as the application fields of industrial lenses become more and more extensive, the market demand for industrial lenses is also increasing. However, existing industrial lenses generally have complex structures, small target surfaces, low pixels, and insufficient relative illumination at larger fields of view, making it difficult to meet the market demand for industrial lenses.

[0003] Based on this, the present invention proposes an industrial lens with large aperture, large target surface and high imaging quality, which can be applied in various application fields. Summary of the invention

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose a large-target-area industrial lens and an industrial lens module to meet the requirements of large aperture, large target area and high imaging quality.

[0005] In a first aspect, a large-image-area industrial lens includes:

[0006] A first lens having negative optical power; the object side surface of the first lens is concave near the optical axis;

[0007] A second lens having positive refractive power; its image side surface is convex near the optical axis;

[0008] The third lens has positive refractive power and its object side surface is concave near the optical axis;

[0009] a fourth lens element having negative optical power, whose object side surface is convex near the optical axis;

[0010] a fifth lens element having positive refractive power, whose object-side surface is convex near the optical axis; and

[0011] a sixth lens element having negative refractive power, whose image side surface is concave near the optical axis;

[0012] The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all aspherical lenses;

[0013] The large-surface industrial lens meets the following conditions:

[0014] -12.001≤ImgH / (SAG11-SAG12)≤-5.309;

[0015] 3.934≤TTL / EPD≤5.367;

[0016] Among them, ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the large target surface industrial lens; SAG11 is the sag SG value of the object side surface of the first lens corresponding to the maximum field of view of the large target surface industrial lens; SAG12 is the sag SG value of the image side surface of the first lens corresponding to the maximum field of view of the large target surface industrial lens; TTL is the distance from the object side surface of the first lens to the imaging surface of the large target surface industrial lens on the optical axis; EPD is the entrance pupil diameter of the large target surface industrial lens.

[0017] Optionally, the large-surface industrial lens satisfies the following conditional formula:

[0018] -0.923≤(R61+R62) / f6≤-0.713;

[0019] Among them, R61 is the curvature radius of the object side of the sixth lens; R62 is the curvature radius of the image side of the sixth lens; f6 is the effective focal length of the sixth lens.

[0020] Optionally, the large-surface industrial lens satisfies the following conditional formula:

[0021] 9.927≤∑CT / N1≤13.568;

[0022] Wherein, ΣCT is the sum of the center thicknesses of all lenses in the optical imaging system; N1 is the refractive index of the first lens.

[0023] Optionally, the large-surface industrial lens satisfies the following conditional formula:

[0024] -80.002≤(R11-R12) / Tan(Semi-FOV)≤-30.008;

[0025] Among them, R11 is the curvature radius of the object side of the first lens; R12 is the curvature radius of the image side of the first lens; Semi-Fov is half of the maximum field of view angle of the large target surface industrial lens.

[0026] Optionally, the large-surface industrial lens satisfies the following conditional formula:

[0027] 2.134≤(DT11+DT12) / ET1≤5.286;

[0028] Among them, 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; ET1 is the edge thickness of the first lens.

[0029] Optionally, the large-surface industrial lens satisfies the following conditional formula:

[0030] 0.523≤(CT1+CT2) / T12≤2.629;

[0031] Wherein, CT1 is the center thickness of the first lens on the optical axis; CT2 is the center thickness of the second lens on the optical axis; T12 is the spacing distance between the first lens and the second lens on the optical axis.

[0032] Optionally, the large-surface industrial lens satisfies the following conditional formula:

[0033] 0.691≤f / (DT61+DT62)≤0.865;

[0034] Among them, f is the total effective focal length of the large target surface industrial lens; DT61 is the maximum effective radius of the object side of the sixth lens; DT62 is the maximum effective radius of the image side of the sixth lens.

[0035] Optionally, the large-surface industrial lens satisfies the following conditional formula:

[0036] -2.813≤ET3 / (SAG31+SAG32)≤-1.989;

[0037] Among them, ET3 is the edge thickness of the third lens; SAG31 is the sag SG value of the object side of the third lens corresponding to the maximum field of view of the large target surface industrial lens; SAG32 is the sag SG value of the image side of the third lens corresponding to the maximum field of view of the large target surface industrial lens.

[0038] Optionally, the large-surface industrial lens satisfies the following conditional formula:

[0039] 64.504≤(R42+R51) / T45≤82.310;

[0040] Among them, R42 is the curvature radius of the image side surface of the fourth lens; R51 is the curvature radius of the object side surface of the fifth lens; T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis.

[0041] In the second aspect, an industrial lens module includes a large-image-surface industrial lens that has a large aperture, a large image surface, and high imaging quality. The beneficial effects of the invention are:

[0042] By reasonably allocating the difference between the sag SG value of the object side of the first lens corresponding to the maximum field angle of view of the large-target surface industrial lens and the sag SG value of the image side of the first lens corresponding to the maximum field angle of view of the large-target surface industrial lens, on this basis, constraining the ratio of half the diagonal length of the effective pixel area on the imaging surface of the large-target surface industrial lens to it within a reasonable range, matching a more suitable image surface on the basis of a larger depth of field range, improving the matching degree of the image sensor, which is beneficial to improving the imaging quality of the large-target surface industrial lens, and also beneficial to achieving the large-target surface requirement of the large-target surface industrial lens;

[0043] By reasonably allocating the distance between the object side of the first lens and the imaging surface of the large-target industrial lens on the optical axis and controlling the ratio of the entrance pupil diameter of the large-target industrial lens within a reasonable range, it is beneficial to increase the relative aperture of the large-target industrial lens, thereby increasing the light throughput of the large-target industrial lens, improving the illumination of the large-target industrial lens, and thus achieving the requirement of a large aperture of the large-target industrial lens. At the same time, better improving the illumination of the large-target industrial lens is beneficial to improving the imaging quality of the large-target industrial lens.

[0044] Therefore, satisfying the above two conditions is conducive to achieving at least one of large aperture, large target area, and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic structural diagram of a large target surface industrial lens according to the first embodiment of the present application;

[0046] Figures 2 to 5 The following are, in order, a spherical aberration curve diagram, an astigmatism curve diagram, a distortion diagram, and a magnification chromatic aberration diagram of a large-surface industrial lens according to an embodiment of the present application;

[0047] Figure 6 is a schematic structural diagram of a large target surface industrial lens according to the second embodiment of the present application;

[0048] Figures 7 to 10 The following are, in order, the spherical aberration curve diagram, the astigmatism curve diagram, the distortion diagram, and the magnification chromatic aberration diagram of the large target surface industrial lens of the second embodiment of the present application;

[0049] Fig.11 is a schematic structural diagram of a large-target-area industrial lens according to Embodiment 3 of the present application;

[0050] Figures 12 to 15 The following are the spherical aberration curve diagram, astigmatism curve diagram, distortion diagram and magnification chromatic aberration diagram of the three target surfaces of the industrial lens in the embodiment of the present application in order;

[0051] Fig.16 is a schematic structural diagram of a large-target-area industrial lens according to Embodiment 4 of the present application;

[0052] Figures 17 to 20The following are the spherical aberration curve diagram, astigmatism curve diagram, distortion diagram and magnification chromatic aberration diagram of the four target surfaces of the industrial lens in the embodiment of the present application in order;

[0053] Fig.21 is a schematic structural diagram of a large target surface industrial lens according to Embodiment 5 of the present application;

[0054] Figure 22 to Figure 25 In order, they are the spherical aberration curve diagram, astigmatism curve diagram, distortion diagram and magnification chromatic aberration diagram of the five large target surface industrial lenses in the embodiments of the present application.

[0055] In the figure: 100, large-target-area industrial lens; 11, first lens; 12, second lens; 13, third lens; 14, fourth lens; 15, fifth lens; 16, sixth lens; 17, filter; 18, image sensor. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0057] It should be noted that, for the convenience of understanding and description, the embodiments of the present application define the representation form of the relevant parameters of the large-target-area industrial lens. For example, TTL is used to represent the distance on the optical axis from the object side of the first lens to the imaging surface of the large-target-area industrial lens; ImgH represents the maximum image height of the large-target-area industrial lens. Similar defined letter representations are merely schematic and can of course be represented in other forms. This application does not impose any limitations thereon.

[0058] It should also be noted that the units of the parameters involving the ratio in the following relationship equations remain consistent. For example, the unit of the numerator is millimeter (mm), and the unit of the denominator is also millimeter (mm).

[0059] It should also be noted that the positive or negative value of the radius of curvature indicates that the optical surface is convex toward the object side or convex toward the image side. When the optical surface (including the object side surface or the image side surface) is convex toward the object side, the radius of curvature of the optical surface is a positive value; when the optical surface (including the object side surface or the image side surface) is convex toward the image side, it is equivalent to the optical surface being concave toward the object side, and the radius of curvature of the optical surface is a negative value.

[0060] It should also be noted that the shape of the lens, the degree of concave-convexity of the object side and the image side in the accompanying drawings are only schematic and do not impose any limitation on the embodiments of the present application. In the present application, the material of the lens can be resin, plastic, or glass. The lens includes a spherical lens and an aspherical lens. The lens can be a fixed focal length lens, a zoom lens, a standard lens, a short focus lens, or a telephoto lens.

[0061] like Figure 1As shown, the large-target-surface industrial lens 100 of the embodiment of the present application includes 6 lenses. For the convenience of description, the left side of the large-target-surface industrial lens 100 is defined as the scene side (hereinafter also referred to as the object side), the surface of the lens facing the object side can be called the object side surface, and the object side surface can also be understood as the surface of the lens close to the object side, and the right side of the large-target-surface industrial lens 100 is the image side (hereinafter also referred to as the image side), the surface of the lens facing the image side can be called the image side surface, and the image side surface can also be understood as the surface of the lens close to the image side. From the object side to the image side, the large-target-surface industrial lens 100 of the embodiment of the present application includes: a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16 in sequence from the object side to the image side; an aperture Stop can also be set between the first lens 11 and the second lens 12. An image sensor 18 such as CCD, CMOS, etc. can also be set after the sixth lens 16. A filter 17 such as a flat infrared cutoff filter can also be set between the sixth lens 16 and the image sensor 18. The large-target-surface industrial lens 100 is described in detail below.

[0062] refer to Figure 1 , Figure 1 The dashed line is used to represent the optical axis of the lens.

[0063] The large-image-area industrial lens 100 of the embodiment of the present application includes, from the object side to the image side, the following:

[0064] a first lens 11 , a second lens 12 , a third lens 13 , a fourth lens 14 , a fifth lens 15 , and a sixth lens 16 .

[0065] It should be understood that the above-mentioned “lenses of the large target surface industrial lens” refer to the lenses that make up the large target surface industrial lens, which in the embodiment of the present application are the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens.

[0066] Optionally, in the embodiments of the present application,

[0067] The first lens 11 may have negative optical power, and the object side surface S1 of the first lens 11 is concave near the optical axis; the image side surface S2 of the first lens 11 is concave near the optical axis;

[0068] The second lens 12 may have positive refractive power, the object side surface S3 of the second lens 12 may be a convex surface near the optical axis, and the image side surface S4 of the second lens 12 may be a convex surface near the optical axis;

[0069] The third lens 13 may have positive refractive power, an object-side surface S5 of the third lens 13 is concave near the optical axis, and an image-side surface S6 of the third lens 13 is convex near the optical axis;

[0070] The fourth lens 14 may have negative optical power, the object-side surface S7 of the fourth lens 14 is convex near the optical axis, and the image-side surface S8 of the fourth lens 14 is concave near the optical axis;

[0071] The fifth lens 15 may have positive refractive power, the object-side surface S9 of the fifth lens 15 is a convex surface near the optical axis, and the image-side surface S10 of the fifth lens 15 is a convex surface near the optical axis;

[0072] The sixth lens 16 may have negative refractive power, an object-side surface S11 of the sixth lens 16 is convex near the optical axis, and an image-side surface S12 of the sixth lens 16 is concave near the optical axis.

[0073] The large-surface industrial lens 100 satisfies the following relationship:

[0074] -12.001≤ImgH / (SAG11-SAG12)≤-5.309;

[0075] 3.934≤TTL / EPD≤5.367;

[0076] ImgH / (SAG11-SAG12) can be -12.001, -10.019, -8.431, -7.231, -5.309; by reasonably allocating the difference between the vector height SG value of the object side surface of the first lens corresponding to the maximum field angle of view of the large target surface industrial lens and the vector height SG value of the image side surface of the first lens corresponding to the maximum field angle of view of the large target surface industrial lens, on this basis, the ratio of half the diagonal length of the effective pixel area on the imaging surface of the large target surface industrial lens to it is constrained to be within a reasonable range, so as to match a more suitable image surface on the basis of a larger depth of field range, improve the matching degree of the image sensor, and be beneficial to improving the imaging quality of the large target surface industrial lens, and also to achieving the large target surface requirement of the large target surface industrial lens.

[0077] TTL / EPD can be 3.934, 4.823, 5.051, 5.231, 5.367; by reasonably allocating the distance from the object side of the first lens to the imaging surface of the large-target industrial lens on the optical axis and controlling the ratio of the entrance pupil diameter of the large-target industrial lens within a reasonable range, it is beneficial to increase the relative aperture of the large-target industrial lens, thereby increasing the light throughput of the large-target industrial lens, and improving the illumination of the large-target industrial lens, thereby achieving the requirement of a large aperture of the large-target industrial lens. At the same time, better improving the illumination of the large-target industrial lens is beneficial to improving the imaging quality of the large-target industrial lens.

[0078] Therefore, satisfying the above two conditions is conducive to achieving at least one of large aperture, large target area, and high imaging quality.

[0079] In certain implementations of the first aspect, the large-target-surface industrial lens satisfies: -0.923≤(R61+R62) / f6≤-0.713; (R61+R62) / f6 can be -0.923, -0.880, -0.845, -0.775, -0.713; by reasonably allocating the sum of the radius of curvature of the object side of the sixth lens and the radius of curvature of the image side of the sixth lens, and on this basis constraining the ratio of the effective focal length of the sixth lens to that of the sixth lens within a reasonable range, it is beneficial to control the contribution of the sixth lens to the spherical aberration of the large-target-surface industrial lens, thereby compensating for the spherical aberration generated by the sixth lens and improving the imaging quality of the large-target-surface industrial lens.

[0080] In certain implementations of the first aspect, the large-target-area industrial lens satisfies: 9.927≤∑CT / N1≤13.568; ∑CT / N1 can be 9.927, 10.616, 10.697, 12.494, or 13.568; by reasonably allocating the ratio of the sum of the center thicknesses of all lenses in the optical imaging system to the refractive index of the first lens within a reasonable range, it is beneficial to correct the system chromatic aberration of the large-target-area industrial lens, improve astigmatism and distortion, and better improve the imaging quality of the large-target-area industrial lens.

[0081] In certain implementations of the first aspect, the large-target-surface industrial lens satisfies: -80.002≤(R11-R12) / Tan(Semi-FOV)≤-30.008; (R11-R12) / Tan(Semi-FOV) can be -80.002, -75.990, -56.218, -48.399, -30.008; by reasonably allocating the difference between the radius of curvature of the object side of the first lens and the radius of curvature of the image side of the first lens, on this basis, constraining the ratio of the tangent value of the object side and the image side of the first lens to be within a reasonable range, the curvature of the object side and the image side of the first lens is controlled to be smaller, so that the light is refracted through the first lens and enters the second lens more gently, thereby reducing the sensitivity of the large-target-surface industrial lens system, thereby improving the stability of the imaging quality of the large-target-surface industrial lens.

[0082] In certain implementations of the first aspect, the large-target-area industrial lens satisfies: 2.134≤(DT11+DT12) / ET1≤5.286; (DT11+DT12) / ET1 can be 2.134, 2.494, 2.918, 3.615, or 5.286; 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 on this basis constraining the ratio of the edge thickness thereof to the first lens within a reasonable range, it is beneficial to improve the processing difficulty of the first lens, increase the assembly stability of the first lens, make the overall structure of the large-target-area industrial lens more compact, and thereby improve the yield rate in the lens production process.

[0083] In certain implementations of the first aspect, the large-target-area industrial lens satisfies: 0.523≤(CT1+CT2) / T12≤2.629; (CT1+CT2) / T12 can be 0.523, 1.091, 1.385, 1.595, or 2.629; by reasonably allocating the sum of the center thickness of the first lens on the optical axis and the center thickness of the second lens on the optical axis, and on this basis constraining the ratio of the center thickness of the first lens to the spacing distance between the first lens and the second lens on the optical axis within a reasonable range, the system chromatic aberration of the infrared lens can be effectively corrected, distortion and coma can be improved, the resolution of the infrared lens can be improved, and the imaging quality can be further improved.

[0084] In certain implementations of the first aspect, the large-target-surface industrial lens satisfies: 0.691≤f / (DT61+DT62)≤0.865; f / (DT61+DT62) can be 0.691, 0.812, 0.815, 0.821, 0.865; by reasonably allocating the sum of the maximum effective radius of the object side of the sixth lens and the maximum effective radius of the image side of the sixth lens, on this basis, constraining the ratio of the total effective focal length of the large-target-surface industrial lens to the sixth lens within a reasonable range, it is beneficial to improve the processing difficulty of the sixth lens, facilitate the assembly stability of the sixth lens, make the overall structure of the large-target-surface industrial lens more compact, and thus improve the yield rate in the lens production process. At the same time, constraining the total effective focal length of the large-target-surface industrial lens within a reasonable range is conducive to achieving the large-target-surface requirement of the large-target-surface industrial lens.

[0085] In certain implementations of the first aspect, the large-target-surface industrial lens satisfies: -2.813≤ET3 / (SAG31+SAG32)≤-1.989; ET3 / (SAG31+SAG32) can be -2.813, -2.361, -2.325, -2.009, or -1.989; by reasonably allocating the sum of the vector height SG value of the object side surface of the third lens corresponding to the maximum field of view of the large-target-surface industrial lens and the vector height SG value of the image side surface of the third lens corresponding to the maximum field of view of the large-target-surface industrial lens, and on this basis constraining the ratio of the edge thickness of the third lens to the edge thickness of the third lens to be within a reasonable range, it is beneficial to improve the stray light at both ends of the third lens, reduce the sensitivity of the large-target-surface industrial lens system, and thus improve the imaging quality of the large-target-surface industrial lens.

[0086] In certain implementations of the first aspect, the large-target-surface industrial lens satisfies: 64.504≤(R42+R51) / T45≤82.310; (R42+R51) / T45 can be 64.504, 70.868, 73.277, 76.882, 82.310; by reasonably allocating the sum of the radius of curvature of the image side surface of the fourth lens and the radius of curvature of the object side surface of the fifth lens, and on this basis constraining the ratio of the distance between the fourth lens and the fifth lens on the optical axis to be within a reasonable range, it is beneficial to correct the system chromatic aberration of the large-target-surface industrial lens, improve astigmatism and distortion, and better improve the imaging quality of the large-target-surface industrial lens.

[0087] In a second aspect, an industrial lens module is provided, comprising a large-target-area industrial lens in any possible implementation method of the first aspect, and may also include an image sensor, an analog-to-digital converter, an image processor, a memory, etc., to realize the camera function of the large-target-area industrial lens.

[0088] The following will be combined Figures 1 to 25 Some specific but non-limiting examples of the embodiments of the present application are described in more detail.

[0089] It should be noted that the embodiment of the present application does not specifically limit the material of each lens of the large-surface industrial lens 100 .

[0090] Embodiment 1

[0091] The large-image-surface industrial lens 100 of one embodiment of the present application 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, a fifth lens 15, and a sixth lens 16, as shown in FIG. Figure 1 shown.

[0092] For the convenience of description, in the following embodiments, Stop represents the surface of the aperture, 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 sixth lens 16, S12 represents the image side surface of the sixth lens 16, S13 represents the object side surface of the filter, S14 represents the image side surface of the filter, and S15 represents the imaging surface. The first lens 11 has negative power, and the object side surface S1 of the first lens 11 is concave near the optical axis; the image side surface S2 of the first lens 11 is concave near the optical axis; the second lens 12 has positive power, and the object side surface S3 of the second lens 12 is convex near the optical axis, and the image side surface S4 of the second lens 12 may be convex near the optical axis; the third lens 13 has positive power, and the object side surface S5 of the third lens 13 is concave near the optical axis, and the image side surface S6 of the third lens 13 is convex near the optical axis; The four lenses 14 have negative optical power, the object-side surface S7 of the fourth lens 14 is convex near the optical axis, and the image-side surface S8 of the fourth lens 14 is concave near the optical axis; the fifth lens 15 has positive optical power, the object-side surface S9 of the fifth lens 15 is convex near the optical axis, and the image-side surface S10 of the fifth lens 15 is convex near the optical axis; the sixth lens 16 has negative optical power, the object-side surface S11 of the sixth lens 16 is convex near the optical axis, and the image-side surface S12 of the sixth lens 16 is concave near the optical axis.

[0093] TTL represents the total optical length of the large-target industrial lens 100, ImgH represents the maximum image height of the large-target industrial lens 100, and EFL represents the effective focal length of the large-target industrial lens 100. Ai represents the correction coefficient of the in-th order of the aspheric surface, i=4, 6, 8, 10, 12, 14, 16, and k represents the cone coefficient.

[0094] According to the above relationship, Table 1 shows the effective focal length EFL, maximum field angle Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and cone coefficient of the large target surface industrial lens 100 in Example 1, wherein the units of the curvature radius and thickness are both millimeters (mm), as shown in Table 1:

[0095] Table 1

[0096]

[0097] Table 2 shows the aspheric coefficients of the large target surface industrial lens 100 of the first embodiment of the present application, as shown in Table 2:

[0098] Table 2

[0099]

[0100] The non-curved surfaces of the lenses of the camera optical lens 100 satisfy:

[0101]

[0102] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / r (that is, the paraxial curvature c is the reciprocal of the curvature radius r in Table 1 above); k is the cone coefficient (given in Table 1 above); Ai is the correction coefficient of the in-th order of the aspheric surface, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are as shown in Table 2.

[0103] It should be understood that the aspheric surface of each lens in the large target surface industrial lens 100 can use the aspheric surface shown in the above aspheric surface formula, or can use other aspheric surface formulas, which is not limited in this application.

[0104] The design data of the large-surface industrial lens 100 of the first embodiment of the present application are given above, the effective focal length EFL is 8.394 mm, the maximum field of view Fov is 73.491 degrees, the total optical length TTL is 29.218 mm, and the aperture F value F.No is 1.601.

[0105] In one embodiment provided in the present application, ImgH / (SAG11-SAG12)=-5.309.

[0106] In one embodiment provided in the present application, TTL / EPD=5.367.

[0107] In one embodiment provided in the present application, (R61+R62) / f6=-0.755.

[0108] In one embodiment provided in the present application, ΣCT / N1=12.494.

[0109] In one embodiment provided in the present application, (R11-R12) / Tan(Semi-FOV)=-48.399.

[0110] In one embodiment provided in the present application, (DT11+DT12) / ET1=2.134.

[0111] In one embodiment provided in the present application, (CT1+CT2) / T12=1.595.

[0112] In one embodiment provided in the present application, f / (DT61+DT62)=0.815.

[0113] In one embodiment provided in the present application, ET3 / (SAG31+SAG32)=-2.813.

[0114] In one embodiment provided in the present application, (R42+R51) / T45=73.277.

[0115] Figures 2 to 5 The optical performance of the large-surface industrial lens 100 designed in the lens combination mode of the first embodiment is described.

[0116] In the first embodiment, the large-target-area industrial lens meets the requirements of large aperture, large target area, and high imaging quality.

[0117] Embodiment 2

[0118] The large-image-surface industrial lens 100 of one embodiment of the present application 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, a fifth lens 15, and a sixth lens 16, as shown in FIG. Figure 6 shown.

[0119] For the convenience of description, in the following embodiments, Stop represents the surface of the aperture, 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 sixth lens 16, S12 represents the image side surface of the sixth lens 16, S13 represents the object side surface of the filter, S14 represents the image side surface of the filter, and S15 represents the imaging surface. The first lens 11 has negative power, and the object side surface S1 of the first lens 11 is concave near the optical axis; the image side surface S2 of the first lens 11 is concave near the optical axis; the second lens 12 has positive power, and the object side surface S3 of the second lens 12 is convex near the optical axis, and the image side surface S4 of the second lens 12 may be convex near the optical axis; the third lens 13 has positive power, and the object side surface S5 of the third lens 13 is concave near the optical axis, and the image side surface S6 of the third lens 13 is convex near the optical axis; The four lenses 14 have negative optical power, the object-side surface S7 of the fourth lens 14 is convex near the optical axis, and the image-side surface S8 of the fourth lens 14 is concave near the optical axis; the fifth lens 15 has positive optical power, the object-side surface S9 of the fifth lens 15 is convex near the optical axis, and the image-side surface S10 of the fifth lens 15 is convex near the optical axis; the sixth lens 16 has negative optical power, the object-side surface S11 of the sixth lens 16 is convex near the optical axis, and the image-side surface S12 of the sixth lens 16 is concave near the optical axis.

[0120] TTL represents the total optical length of the large-target industrial lens 100, ImgH represents the maximum image height of the large-target industrial lens 100, and EFL represents the effective focal length of the large-target industrial lens 100. Ai represents the correction coefficient of the in-th order of the aspheric surface, i=4, 6, 8, 10, 12, 14, 16, and k represents the cone coefficient.

[0121] According to the above relationship, Table 3 shows the effective focal length EFL, maximum field angle Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and cone coefficient of the large target surface industrial lens 100 in Example 2, wherein the units of the curvature radius and thickness are both millimeters (mm), as shown in Table 3:

[0122] Table 3

[0123]

[0124] Table 4 shows the aspheric coefficients of the large target surface industrial lens 100 of the second embodiment of the present application, as shown in Table 4:

[0125] Table 4

[0126] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.850E-03 -2.834E-04 2.075E-05 -1.336E-06 6.355E-08 -1.913E-09 2.643E-11 S2 5.473E-03 -2.408E-04 8.423E-06 2.947E-07 -6.057E-08 3.595E-09 -8.728E-11 S3 9.398E-04 -5.744E-05 2.542E-06 -7.768E-08 8.229E-11 4.151E-11 -7.257E-14 S4 9.151E-04 -2.451E-04 2.084E-05 -9.684E-07 2.294E-08 -2.009E-10 6.995E-14 S5 5.570E-04 -3.220E-04 1.777E-05 3.312E-07 -8.414E-08 3.792E-09 -5.714E-11 S6 4.113E-03 -8.394E-04 7.619E-05 -3.770E-06 9.937E-08 -1.162E-09 3.053E-12 S7 3.533E-03 -8.888E-04 9.103E-05 -4.762E-06 1.242E-07 -1.280E-09 -3.387E-14 S8 -6.844E-04 -2.871E-04 3.648E-05 -2.075E-06 5.450E-08 -5.122E-10 -1.246E-12 S9 1.540E-03 -2.143E-04 1.810E-05 -9.340E-07 2.599E-08 -3.291E-10 1.041E-12 S10 -1.533E-03 1.483E-04 -9.379E-06 3.911E-07 -1.068E-08 1.928E-10 -1.278E-12 S11 -6.068E-03 1.020E-04 6.036E-06 -8.493E-07 4.077E-08 -8.881E-10 7.293E-12 S12 -4.622E-03 2.913E-04 -1.666E-05 6.982E-07 -1.960E-08 3.211E-10 -2.295E-12

[0127] The non-curved surfaces of the lenses of the camera optical lens 100 satisfy:

[0128]

[0129] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / r (that is, the paraxial curvature c is the reciprocal of the curvature radius r in Table 3 above); k is the cone coefficient (given in Table 3 above); Ai is the correction coefficient of the in-th order of the aspheric surface, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are as shown in Table 4.

[0130] It should be understood that the aspheric surface of each lens in the large target surface industrial lens 100 can use the aspheric surface shown in the above aspheric surface formula, or can use other aspheric surface formulas, which is not limited in this application.

[0131] The design data of the large-surface industrial lens 100 of the second embodiment of the present application are given above, the effective focal length EFL is 9.089 mm, the maximum field of view Fov is 69.173 degrees, the total optical length TTL is 25.216 mm, and the aperture F value F.No is 1.478.

[0132] In one embodiment provided in the present application, ImgH / (SAG11-SAG12)=-12.001.

[0133] In one embodiment provided in the present application, TTL / EPD=3.934.

[0134] In one embodiment provided in the present application, (R61+R62) / f6=-0.923.

[0135] In one embodiment provided in the present application, ΣCT / N1=10.616.

[0136] In one embodiment provided in the present application, (R11-R12) / Tan(Semi-FOV)=-75.990.

[0137] In one embodiment provided in the present application, (DT11+DT12) / ET1=3.615.

[0138] In one embodiment provided in the present application, (CT1+CT2) / T12=1.385.

[0139] In one embodiment provided in the present application, f / (DT61+DT62)=0.865.

[0140] In one embodiment provided in the present application, ET3 / (SAG31+SAG32)=-2.361.

[0141] In one embodiment provided in the present application, (R42+R51) / T45=82.310.

[0142] Figures 7 to 10 The optical performance of the large-surface industrial lens 100 designed in the lens combination mode of the second embodiment is described.

[0143] In the second embodiment, the large target surface industrial lens meets the requirements of large aperture, large target surface and high imaging quality.

[0144] Embodiment 3

[0145] The large-image-surface industrial lens 100 of one embodiment of the present application 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, a fifth lens 15, and a sixth lens 16, as shown in FIG. Fig.11 shown.

[0146] For the convenience of description, in the following embodiments, Stop represents the surface of the aperture, 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 sixth lens 16, S12 represents the image side surface of the sixth lens 16, S13 represents the object side surface of the filter, S14 represents the image side surface of the filter, and S15 represents the imaging surface. The first lens 11 has negative power, and the object side surface S1 of the first lens 11 is concave near the optical axis; the image side surface S2 of the first lens 11 is concave near the optical axis; the second lens 12 has positive power, and the object side surface S3 of the second lens 12 is convex near the optical axis, and the image side surface S4 of the second lens 12 may be convex near the optical axis; the third lens 13 has positive power, and the object side surface S5 of the third lens 13 is concave near the optical axis, and the image side surface S6 of the third lens 13 is convex near the optical axis; The four lenses 14 have negative optical power, the object-side surface S7 of the fourth lens 14 is convex near the optical axis, and the image-side surface S8 of the fourth lens 14 is concave near the optical axis; the fifth lens 15 has positive optical power, the object-side surface S9 of the fifth lens 15 is convex near the optical axis, and the image-side surface S10 of the fifth lens 15 is convex near the optical axis; the sixth lens 16 has negative optical power, the object-side surface S11 of the sixth lens 16 is convex near the optical axis, and the image-side surface S12 of the sixth lens 16 is concave near the optical axis.

[0147] TTL represents the total optical length of the large-target industrial lens 100, ImgH represents the maximum image height of the large-target industrial lens 100, and EFL represents the effective focal length of the large-target industrial lens 100. Ai represents the correction coefficient of the in-th order of the aspheric surface, i=4, 6, 8, 10, 12, 14, 16, and k represents the cone coefficient.

[0148] According to the above relationship, Table 5 shows the effective focal length EFL, maximum field angle Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and cone coefficient of the large target surface industrial lens 100 in Example 3, wherein the units of the curvature radius and thickness are both millimeters (mm), as shown in Table 5:

[0149] Table 5

[0150]

[0151] Table 6 shows the aspheric coefficients of the large target surface industrial lens 100 of the third embodiment of the present application, as shown in Table 6:

[0152] Table 6

[0153]

[0154]

[0155] The non-curved surfaces of the lenses of the camera optical lens 100 satisfy:

[0156]

[0157] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / r (that is, the paraxial curvature c is the reciprocal of the curvature radius r in Table 5 above); k is the cone coefficient (given in Table 5 above); Ai is the correction coefficient of the in-th order of the aspheric surface, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are as shown in Table 6.

[0158] It should be understood that the aspheric surface of each lens in the large target surface industrial lens 100 can use the aspheric surface shown in the above aspheric surface formula, or can use other aspheric surface formulas, which is not limited in this application.

[0159] The design data of the large-surface industrial lens 100 of the third embodiment of the present application are given above, the effective focal length EFL is 7.230 mm, the maximum field of view Fov is 82.035 degrees, the total optical length TTL is 27.337 mm, and the aperture F value F.No is 1.442.

[0160] In one embodiment provided in the present application, ImgH / (SAG11-SAG12)=-7.231.

[0161] In one embodiment provided in the present application, TTL / EPD=5.051.

[0162] In one embodiment provided in the present application, (R61+R62) / f6=-0.713.

[0163] In one embodiment provided in the present application, ΣCT / N1=10.697.

[0164] In one embodiment provided in the present application, (R11-R12) / Tan(Semi-FOV)=-30.008.

[0165] In one embodiment provided in the present application, (DT11+DT12) / ET1=2.918.

[0166] In one embodiment provided in the present application, (CT1+CT2) / T12=1.091.

[0167] In one embodiment provided in the present application, f / (DT61+DT62)=0.691.

[0168] In one embodiment provided in the present application, ET3 / (SAG31+SAG32)=-2.009.

[0169] In one embodiment provided in the present application, (R42+R51) / T45=76.882.

[0170] Figures 12 to 15 The optical performance of the large-surface industrial lens 100 designed in the lens combination mode of the third embodiment is described.

[0171] In the third embodiment, the large-target-area industrial lens meets the requirements of large aperture, large target area, and high imaging quality.

[0172] Embodiment 4

[0173] The large-image-surface industrial lens 100 of one embodiment of the present application 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, a fifth lens 15, and a sixth lens 16, as shown in FIG. Fig.16 shown.

[0174] For the convenience of description, in the following embodiments, Stop represents the surface of the aperture, 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 sixth lens 16, S12 represents the image side surface of the sixth lens 16, S13 represents the object side surface of the filter, S14 represents the image side surface of the filter, and S15 represents the imaging surface. The first lens 11 has negative power, and the object side surface S1 of the first lens 11 is concave near the optical axis; the image side surface S2 of the first lens 11 is concave near the optical axis; the second lens 12 has positive power, and the object side surface S3 of the second lens 12 is convex near the optical axis, and the image side surface S4 of the second lens 12 may be convex near the optical axis; the third lens 13 has positive power, and the object side surface S5 of the third lens 13 is concave near the optical axis, and the image side surface S6 of the third lens 13 is convex near the optical axis; The four lenses 14 have negative optical power, the object-side surface S7 of the fourth lens 14 is convex near the optical axis, and the image-side surface S8 of the fourth lens 14 is concave near the optical axis; the fifth lens 15 has positive optical power, the object-side surface S9 of the fifth lens 15 is convex near the optical axis, and the image-side surface S10 of the fifth lens 15 is convex near the optical axis; the sixth lens 16 has negative optical power, the object-side surface S11 of the sixth lens 16 is convex near the optical axis, and the image-side surface S12 of the sixth lens 16 is concave near the optical axis.

[0175] TTL represents the total optical length of the large-target industrial lens 100, ImgH represents the maximum image height of the large-target industrial lens 100, and EFL represents the effective focal length of the large-target industrial lens 100. Ai represents the correction coefficient of the in-th order of the aspheric surface, i=4, 6, 8, 10, 12, 14, 16, and k represents the cone coefficient.

[0176] According to the above relationship, Table 7 shows the effective focal length EFL, maximum field angle Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and cone coefficient of the large target surface industrial lens 100 in Example 4, wherein the units of the curvature radius and thickness are both millimeters (mm), as shown in Table 7:

[0177] Table 7

[0178]

[0179] Table 8 shows the aspheric coefficients of the large target surface industrial lens 100 of the fourth embodiment of the present application, as shown in Table 8:

[0180] Table 8

[0181] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.260E-03 -3.392E-04 1.951E-05 -1.172E-06 6.642E-08 -2.223E-09 2.748E-11 S2 5.839E-03 -2.703E-04 1.940E-06 4.779E-07 -3.509E-08 3.526E-09 -1.594E-10 S3 7.611E-04 -5.469E-05 2.918E-06 -6.859E-08 2.993E-10 5.755E-11 1.651E-12 S4 9.608E-04 -2.442E-04 2.102E-05 -9.572E-07 2.337E-08 -1.832E-10 1.755E-12 S5 5.549E-04 -3.212E-04 1.772E-05 3.418E-07 -8.344E-08 3.783E-09 -6.050E-11 S6 4.066E-03 -8.402E-04 7.620E-05 -3.777E-06 9.928E-08 -1.156E-09 3.028E-12 S7 3.559E-03 -8.877E-04 9.093E-05 -4.762E-06 1.242E-07 -1.280E-09 1.910E-13 S8 -7.038E-04 -2.860E-04 3.655E-05 -2.076E-06 5.448E-08 -5.095E-10 -1.150E-12 S9 1.598E-03 -2.149E-04 1.802E-05 -9.343E-07 2.598E-08 -3.300E-10 1.074E-12 S10 -1.545E-03 1.426E-04 -9.565E-06 3.884E-07 -1.068E-08 1.905E-10 -1.556E-12 S11 -6.018E-03 9.453E-05 6.103E-06 -8.469E-07 3.903E-08 -9.397E-10 1.086E-11 S12 -4.883E-03 3.127E-04 -1.702E-05 6.901E-07 -1.926E-08 3.327E-10 -2.607E-12

[0182] The non-curved surfaces of the lenses of the camera optical lens 100 satisfy:

[0183]

[0184] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / r (that is, the paraxial curvature c is the reciprocal of the curvature radius r in Table 7 above); k is the cone coefficient (given in Table 7 above); Ai is the correction coefficient of the in-th order of the aspheric surface, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are as shown in Table 8.

[0185] It should be understood that the aspheric surface of each lens in the large target surface industrial lens 100 can use the aspheric surface shown in the above aspheric surface formula, or can use other aspheric surface formulas, which is not limited in this application.

[0186] The design data of the large-surface industrial lens 100 of the fourth embodiment of the present application are given above, the effective focal length EFL is 8.406 mm, the maximum field of view Fov is 73.413 degrees, the total optical length TTL is 27.177 mm, and the aperture F value F.No is 1.550.

[0187] In one embodiment provided in the present application, ImgH / (SAG11-SAG12)=-10.019.

[0188] In one embodiment provided in the present application, TTL / EPD=4.823.

[0189] In one embodiment provided in the present application, (R61+R62) / f6=-0.880.

[0190] In one embodiment provided in the present application, ΣCT / N1=9.927.

[0191] In one embodiment provided in the present application, (R11-R12) / Tan(Semi-FOV)=-56.218.

[0192] In one embodiment provided in the present application, (DT11+DT12) / ET1=5.286.

[0193] In one embodiment provided in the present application, (CT1+CT2) / T12=0.523.

[0194] In one embodiment provided in the present application, f / (DT61+DT62)=0.821.

[0195] In one embodiment provided in the present application, ET3 / (SAG31+SAG32)=-1.989.

[0196] In one embodiment provided in the present application, (R42+R51) / T45=70.868.

[0197] Figures 17 to 20 The optical performance of the large-surface industrial lens 100 designed in the lens combination mode of the fourth embodiment is described.

[0198] In the fourth embodiment, the large target surface industrial lens meets the requirements of large aperture, large target surface and high imaging quality.

[0199] Embodiment 5

[0200] The large-image-surface industrial lens 100 of one embodiment of the present application 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, a fifth lens 15, and a sixth lens 16, as shown in FIG. Fig.21 shown.

[0201] For the convenience of description, in the following embodiments, Stop represents the surface of the aperture, 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 sixth lens 16, S12 represents the image side surface of the sixth lens 16, S13 represents the object side surface of the filter, S14 represents the image side surface of the filter, and S15 represents the imaging surface. The first lens 11 has negative power, and the object side surface S1 of the first lens 11 is concave near the optical axis; the image side surface S2 of the first lens 11 is concave near the optical axis; the second lens 12 has positive power, and the object side surface S3 of the second lens 12 is convex near the optical axis, and the image side surface S4 of the second lens 12 may be convex near the optical axis; the third lens 13 has positive power, and the object side surface S5 of the third lens 13 is concave near the optical axis, and the image side surface S6 of the third lens 13 is convex near the optical axis; The four lenses 14 have negative optical power, the object-side surface S7 of the fourth lens 14 is convex near the optical axis, and the image-side surface S8 of the fourth lens 14 is concave near the optical axis; the fifth lens 15 has positive optical power, the object-side surface S9 of the fifth lens 15 is convex near the optical axis, and the image-side surface S10 of the fifth lens 15 is convex near the optical axis; the sixth lens 16 has negative optical power, the object-side surface S11 of the sixth lens 16 is convex near the optical axis, and the image-side surface S12 of the sixth lens 16 is concave near the optical axis.

[0202] TTL represents the total optical length of the large-target industrial lens 100, ImgH represents the maximum image height of the large-target industrial lens 100, and EFL represents the effective focal length of the large-target industrial lens 100. Ai represents the correction coefficient of the in-th order of the aspheric surface, i=4, 6, 8, 10, 12, 14, 16, and k represents the cone coefficient.

[0203] According to the above relationship, Table 9 shows the effective focal length EFL, maximum field angle Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and cone coefficient of the large target surface industrial lens 100 in Example 5, wherein the units of the curvature radius and thickness are both millimeters (mm), as shown in Table 9:

[0204] Table 9

[0205]

[0206]

[0207] Table 10 shows the aspheric coefficients of the large target surface industrial lens 100 of Example 5 of the present application, as shown in Table 10:

[0208] Table 10

[0209] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.751E-03 -2.569E-04 1.996E-05 -1.374E-06 6.502E-08 -1.775E-09 2.080E-11 S2 5.247E-03 -1.999E-04 8.496E-06 1.551E-07 -6.758E-08 3.846E-09 -5.414E-11 S3 1.041E-03 -6.157E-05 2.519E-06 -7.248E-08 3.792E-10 3.580E-11 -8.741E-13 S4 9.275E-04 -2.424E-04 2.075E-05 -9.705E-07 2.324E-08 -1.779E-10 -1.700E-12 S5 5.806E-04 -3.287E-04 1.755E-05 3.262E-07 -8.417E-08 3.786E-09 -5.726E-11 S6 4.112E-03 -8.413E-04 7.624E-05 -3.775E-06 9.903E-08 -1.168E-09 3.881E-12 S7 3.561E-03 -8.867E-04 9.088E-05 -4.768E-06 1.240E-07 -1.279E-09 4.885E-13 S8 -7.860E-04 -2.937E-04 3.641E-05 -2.075E-06 5.447E-08 -5.123E-10 -1.130E-12 S9 1.428E-03 -2.110E-04 1.803E-05 -9.367E-07 2.599E-08 -3.270E-10 1.066E-12 S10 -1.534E-03 1.489E-04 -9.457E-06 3.883E-07 -1.077E-08 1.884E-10 -1.514E-12 S11 -5.310E-03 9.603E-05 5.927E-06 -8.416E-07 3.994E-08 -9.136E-10 8.359E-12 S12 -3.815E-03 2.740E-04 -1.667E-05 7.071E-07 -1.970E-08 3.150E-10 -2.161E-12

[0210] The non-curved surfaces of the lenses of the camera optical lens 100 satisfy:

[0211]

[0212] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c=1 / r (that is, the paraxial curvature c is the reciprocal of the curvature radius r in Table 9 above); k is the cone coefficient (given in Table 9 above); Ai is the correction coefficient of the in-th order of the aspherical surface, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are as shown in Table 10.

[0213] It should be understood that the aspheric surface of each lens in the large target surface industrial lens 100 can use the aspheric surface shown in the above aspheric surface formula, or can use other aspheric surface formulas, which is not limited in this application.

[0214] The design data of the large-surface industrial lens 100 of the fifth embodiment of the present application are given above, the effective focal length EFL is 8.934 mm, the maximum field of view Fov is 70.099 degrees, the total optical length TTL is 30.483 mm, and the aperture F value F.No is 1.602.

[0215] In one embodiment provided in the present application, ImgH / (SAG11-SAG12)=-8.431.

[0216] In one embodiment provided in the present application, TTL / EPD=5.231.

[0217] In one embodiment provided in the present application, (R61+R62) / f6=-0.845.

[0218] In one embodiment provided in the present application, ΣCT / N1=13.568.

[0219] In one embodiment provided in the present application, (R11-R12) / Tan(Semi-FOV)=-80.002.

[0220] In one embodiment provided in the present application, (DT11+DT12) / ET1=2.494.

[0221] In one embodiment provided in the present application, (CT1+CT2) / T12=2.629.

[0222] In one embodiment provided in the present application, f / (DT61+DT62)=0.812.

[0223] In one embodiment provided in the present application, ET3 / (SAG31+SAG32)=-2.325.

[0224] In one embodiment provided in the present application, (R42+R51) / T45=64.504.

[0225] Figure 22 to Figure 25 The optical performance of the large-surface industrial lens 100 designed with the lens combination method of the fifth embodiment is described.

[0226] In the fifth embodiment, the large target surface industrial lens meets the requirements of large aperture, large target surface and high imaging quality.

[0227] In addition, the ImgH / (SAG11-SAG12) ratio, TTL / EPD ratio, (R61+R62) / f6 ratio, ∑CT / N1 ratio, (R11-R12) / Tan(Semi-FOV) ratio, (DT11+DT12) / ET1 ratio, (CT1+CT2) / T12 ratio, f / (DT61+DT62) ratio, ET3 / (SAG31+SAG32) ratio, and (R42+R51) / T45 ratio corresponding to Examples 1 to 5 are shown in Table 11:

[0228] Table 11

[0229] Conditional expression Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 ImgH / (SAG11-SAG12) -5.309 -12.001 -7.231 -10.019 -8.431 TTL / EPD 5.367 3.934 5.051 4.823 5.231 (R61+R62) / f6 -0.775 -0.923 -0.713 -0.880 -0.845 ∑CT / N1 12.494 10.616 10.697 9.927 13.568 (R11-R12) / Tan(Semi-FOV) -48.399 -75.990 -30.008 -56.218 -80.002 (DT11+DT12) / ET1 2.134 3.615 2.918 5.286 2.494 (CT1+CT2) / T12 1.595 1.385 1.091 0.523 2.629 f / (DT61+DT62) 0.815 0.865 0.691 0.821 0.812 ET3 / (SAG31+SAG32) -2.813 -2.361 -2.009 -1.989 -2.325 (R42+R51) / T45 73.277 82.310 76.882 70.868 64.504

[0230] The present invention is described by preferred embodiments. Those skilled in the art will appreciate that various changes or equivalent substitutions may 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, and other embodiments falling within the claims of this application are within the scope of protection of the invention.

Claims

1. A large-surface industrial lens, characterized in that: Along the optical axis from the object side to the image side, they include: A first lens having negative optical power; the object side surface of the first lens is concave near the optical axis; A second lens having positive refractive power; its image side surface is convex near the optical axis; The third lens has positive refractive power and its object side surface is concave near the optical axis; a fourth lens element having negative optical power, whose object side surface is convex near the optical axis; a fifth lens element having positive refractive power, whose object-side surface is convex near the optical axis; and a sixth lens element having negative refractive power, whose image side surface is concave near the optical axis; The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all aspherical lenses; The large-surface industrial lens meets the following conditions: -12.001≤ImgH / (SAG11-SAG12)≤-5.309; 3.934≤TTL / EPD≤5.367; Among them, ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the large target surface industrial lens; SAG11 is the sag SG value of the object side surface of the first lens corresponding to the maximum field of view of the large target surface industrial lens; SAG12 is the sag SG value of the image side surface of the first lens corresponding to the maximum field of view of the large target surface industrial lens; TTL is the distance from the object side surface of the first lens to the imaging surface of the large target surface industrial lens on the optical axis; EPD is the entrance pupil diameter of the large target surface industrial lens.

2. The large-surface industrial lens according to claim 1, characterized in that: The large-surface industrial lens meets the following conditions: -0.923≤(R61+R62) / f6≤-0.713; Among them, R61 is the curvature radius of the object side of the sixth lens; R62 is the curvature radius of the image side of the sixth lens; f6 is the effective focal length of the sixth lens.

3. The large-surface industrial lens according to claim 1, characterized in that: The large-surface industrial lens meets the following conditions: 9.927≤∑CT / N1≤13.568; Wherein, ΣCT is the sum of the center thicknesses of all lenses in the optical imaging system; N1 is the refractive index of the first lens.

4. The large-surface industrial lens according to claim 1, characterized in that: The large-surface industrial lens meets the following conditions: -80.002≤(R11-R12) / Tan(Semi-FOV)≤-30.008; Among them, R11 is the curvature radius of the object side of the first lens; R12 is the curvature radius of the image side of the first lens; Semi-Fov is half of the maximum field of view angle of the large target surface industrial lens.

5. The large-surface industrial lens according to claim 1, characterized in that: The large-surface industrial lens meets the following conditions: 2.134≤(DT11+DT12) / ET1≤5.286; Among them, 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; ET1 is the edge thickness of the first lens.

6. The large-surface industrial lens according to claim 1, characterized in that: The large-surface industrial lens meets the following conditions: 0.523≤(CT1+CT2) / T12≤2.629; Wherein, CT1 is the center thickness of the first lens on the optical axis; CT2 is the center thickness of the second lens on the optical axis; T12 is the spacing distance between the first lens and the second lens on the optical axis.

7. The large-surface industrial lens according to claim 1, characterized in that: The large-surface industrial lens meets the following conditions: 0.691≤f / (DT61+DT62)≤0.865; Among them, f is the total effective focal length of the large target surface industrial lens; DT61 is the maximum effective radius of the object side of the sixth lens; DT62 is the maximum effective radius of the image side of the sixth lens.

8. The large-surface industrial lens according to claim 1, characterized in that: The large-surface industrial lens meets the following conditions: -2.813≤ET3 / (SAG31+SAG32)≤-1.989; Among them, ET3 is the edge thickness of the third lens; SAG31 is the sag SG value of the object side of the third lens corresponding to the maximum field of view of the large target surface industrial lens; SAG32 is the sag SG value of the image side of the third lens corresponding to the maximum field of view of the large target surface industrial lens.

9. The large-surface industrial lens according to claim 1, characterized in that: The large-surface industrial lens meets the following conditions: 64.504≤(R42+R51) / T45≤82.310; Among them, R42 is the curvature radius of the image side surface of the fourth lens; R51 is the curvature radius of the object side surface of the fifth lens; T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis.

10. An industrial lens module, characterized in that: It comprises the large-surface industrial lens as claimed in any one of claims 1 to 9.

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