Large-area industrial lenses and industrial lens modules

Abstract

The present invention discloses a large-area industrial lens and an industrial lens module, belonging to the field of optical imaging technology. The lens comprises, in order from the object side to the image side along the optical axis, a first lens with negative optical power; a second lens with positive optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with positive optical power; and a sixth lens with negative optical power. The large-area industrial lens satisfies the following conditions: -12.001≤ImgH / (SAG11-SAG12)≤-5.309; and 3.934≤TTL / EPD≤5.367. The combination of the first, second, third, fourth, fifth, and sixth lenses improves the illumination of the large-area industrial lens, thereby facilitating the large aperture and large target surface requirements of the large-area industrial lens and improving the imaging quality of the large-area industrial lens.

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 to conventional camera lenses, industrial lenses offer higher precision, resolution, and stability, meeting the stringent requirements for image quality and reliability in industrial applications. However, as industrial lens applications expand, market demand for them is also increasing. However, existing industrial lenses often suffer from complex structures, small image areas, low pixel count, and insufficient relative illumination at larger fields of view, making them difficult to meet market demand.

[0003] Based on this, the present invention proposes an industrial lens with large aperture, large target area and high imaging quality, which can be used 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 that meet the requirements of large aperture, large target area, and high imaging quality.

[0005] In a first aspect, a large-area industrial lens includes the following components arranged in order from the object side to the image side along the optical axis:

[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 element 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, the object-side surface of which is convex near the optical axis;

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

[0011] a sixth lens element having negative optical power and a concave image-side surface 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-area industrial lens satisfies 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-area 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-area 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-area 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-surface industrial lens.

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

[0027] 2.134≤(DT11+DT12) / ET1≤5.286;

[0028] 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; and ET1 is the edge thickness of the first lens.

[0029] Optionally, the large-area 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 distance between the first lens and the second lens on the optical axis.

[0032] Optionally, the large-area 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-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-area 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-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-surface industrial lens.

[0038] Optionally, the large-area 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 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 height SG value of the object side surface of the first lens corresponding to the maximum field of view of the large-target industrial lens and the sag height SG value of the image side surface of the first lens corresponding to the maximum field of view of the large-target 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 industrial lens to it within a reasonable range, a more suitable image surface is matched on the basis of meeting a larger depth of field range, and the matching degree of the image sensor is improved, which is beneficial to improving the imaging quality of the large-target industrial lens and also beneficial to achieving the large-target surface requirement of the large-target industrial lens;

[0043] By rationally allocating the distance between the object side of the first lens and the imaging plane of the large-target-area industrial lens on the optical axis and controlling the ratio of the entrance pupil diameter of the large-target-area industrial lens within a reasonable range, it is beneficial to increase the relative aperture of the large-target-area industrial lens, thereby increasing the light throughput of the large-target-area industrial lens and improving the illumination of the large-target-area industrial lens, thereby achieving the large aperture requirement of the large-target-area industrial lens. At the same time, the illumination of the large-target-area industrial lens is further improved, which is conducive to improving the imaging quality of the large-target-area 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 This is a schematic structural diagram of a large-target-area industrial lens according to the first embodiment of the present application;

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

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

[0048] Figures 7 to 10 The following are the spherical aberration curve, astigmatism curve, distortion diagram and magnification chromatic aberration diagram of the large target surface industrial lens of Example 2 of the present application;

[0049] Figure 11 1 is a schematic structural diagram of a large-area industrial lens according to the third embodiment of the present application;

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

[0051] Figure 16 1 is a schematic structural diagram of a large-area industrial lens according to the fourth embodiment of the present application;

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

[0053] Figure 21 1 is a schematic structural diagram of a large-area industrial lens according to the fifth embodiment of the present application;

[0054] Figures 22 to 25 The following 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 this application.

[0055] In the figure: 100, large-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 with reference to 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 from the object side of the first lens to the imaging surface of the large-target-area industrial lens on the optical axis; 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.

[0058] It should also be noted that the units of the parameters involved in the ratio in the following relationship formula 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 whether 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 positive; 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 negative.

[0060] 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 surfaces in the accompanying drawings are merely illustrative and do not limit the embodiments of the present application. In the present application, the material of the lens can be resin, plastic, or glass. The lens includes spherical lenses and aspherical lenses. 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-area industrial lens 100 of the present embodiment comprises six lenses. For ease of description, the left side of the large-area industrial lens 100 is defined as the object side (hereinafter referred to as the object side). The surface of the lens facing the object side is referred to as the object side surface, which can also be understood as the surface of the lens closest to the object side. The right side of the large-area industrial lens 100 is defined as the image side (hereinafter referred to as the image side). The surface of the lens facing the image side is referred to as the image side surface, which can also be understood as the surface of the lens closest to the image side. From the object side to the image side, the large-area industrial lens 100 of the present embodiment comprises, in order: 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. A stop may be provided between the first lens 11 and the second lens 12. An image sensor 18, such as a CCD or CMOS, may be provided behind the sixth lens 16. A filter 17, such as a flat infrared cutoff filter, may also be provided between the sixth lens 16 and the image sensor 18. The large-area industrial lens 100 is described in detail below.

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

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

[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-area industrial lens” refer to the lenses that make up the large-target-area 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 embodiment 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 convex near the optical axis, and the image-side surface S4 of the second lens 12 may be convex near the optical axis;

[0069] The third lens 13 may have positive refractive power, 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;

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

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

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

[0073] The large-area 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 sag SG value of the object side surface of the first lens corresponding to the maximum field of view of the large-target industrial lens and the sag SG value of the image side surface of the first lens corresponding to the maximum field of view of the large-target 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 industrial lens to it within a reasonable range, meeting the requirements of a larger depth of field range for matching a more suitable image surface, improving the matching degree of the image sensor, and helping to improve the imaging quality of the large-target industrial lens, and also helping to achieve the large-target surface requirements of the large-target industrial lens.

[0077] TTL / EPD can be 3.934, 4.823, 5.051, 5.231, or 5.367. By rationally allocating the distance on the optical axis from the object side of the first lens to the imaging plane of the large-image-area industrial lens and controlling the ratio of the entrance pupil diameter of the large-image-area industrial lens within a reasonable range, it is beneficial to increase the relative aperture of the large-image-area industrial lens, thereby increasing the light throughput of the large-image-area industrial lens and improving the illumination of the large-image-area industrial lens, thereby achieving the large aperture requirement of the large-image-area industrial lens. At the same time, the illumination of the large-image-area industrial lens is further improved, which is conducive to improving the imaging quality of the large-image-area 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-area industrial lens satisfies: -0.923≤(R61+R62) / f6≤-0.713; (R61+R62) / f6 can be -0.923, -0.880, -0.845, -0.775, or -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 thereof to the effective focal length 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-area industrial lens, thereby compensating for the spherical aberration generated by the sixth lens, and improving the imaging quality of the large-target-area industrial lens.

[0080] In certain implementations of the first aspect, the large-target-area industrial lens satisfies the following conditions: 9.927≤∑CT / N1≤13.568; ∑CT / N1 can be 9.927, 10.616, 10.697, 12.494, or 13.568; by reasonably distributing 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, and on this basis constraining the ratio of the tangent value of the object side and the image side of the first lens to half of the maximum field of view of the large-target-surface industrial 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 smoothly, thereby reducing the sensitivity of the large-target-surface industrial lens system and 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 surface of the first lens and the maximum effective radius of the image side surface of the first lens, and on this basis constraining the ratio thereof to the edge thickness of 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 the following: 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 sum to the spacing distance between the first lens and the second lens on the optical axis within a reasonable range, the systematic 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-area industrial lens satisfies the following conditions: 0.691 ≤ f / (DT61 + DT62) ≤ 0.865; f / (DT61 + DT62) can be 0.691, 0.812, 0.815, 0.821, or 0.865. By rationally allocating the sum of the maximum effective radius of the object-side surface of the sixth lens and the maximum effective radius of the image-side surface of the sixth lens, and on this basis constraining the ratio of the total effective focal length of the large-target-area industrial lens to the sum of the maximum effective radius of the object-side surface of the sixth lens within a reasonable range, the processing difficulty of the sixth lens is improved, the assembly stability of the sixth lens is facilitated, the overall structure of the large-target-area industrial lens is made more compact, and the yield rate of the lens during production is improved. Furthermore, constraining the total effective focal length of the large-target-area industrial lens within a reasonable range is conducive to achieving the large-target-area requirement of the large-target-area industrial lens.

[0085] In certain implementations of the first aspect, the large-target-area 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 sag height SG value of the object side surface of the third lens corresponding to the maximum field of view of the large-target-area industrial lens and the sag height SG value of the image side surface of the third lens corresponding to the maximum field of view of the large-target-area industrial lens, and on this basis constraining the ratio of the edge thickness of the third lens thereto 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-area industrial lens system, and thus improve the imaging quality of the large-target-area industrial lens.

[0086] In certain implementations of the first aspect, the large-target-area industrial lens satisfies: 64.504≤(R42+R51) / T45≤82.310; (R42+R51) / T45 can be 64.504, 70.868, 73.277, 76.882, or 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 sum to the spacing distance between the fourth lens and the fifth lens on the optical axis 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.

[0087] In the second aspect, an industrial lens module is provided, which includes 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 and 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-area industrial lens 100.

[0090] Example 1

[0091] The large-area 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. Figure 1 shown.

[0092] For 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 fourth lens 14 has 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-area industrial lens 100, ImgH represents the maximum image height of the large-target-area industrial lens 100, and EFL represents the effective focal length of the large-target-area industrial lens 100. Ai represents the correction coefficient of the in-th order aspheric surface, where i = 4, 6, 8, 10, 12, 14, or 16, and k represents the conic coefficient.

[0094] Based on the above relationship, Table 1 shows the effective focal length EFL, maximum field of view Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and conic coefficient of the large target area industrial lens 100 in Example 1, where the units of 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-area industrial lens 100 according to 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 the following requirements:

[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 (i.e., the paraxial curvature c is the reciprocal of the curvature radius r in Table 1 above); k is the conic coefficient (given in Table 1 above); Ai is the correction coefficient of the i-th order of the aspheric surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are shown in Table 2.

[0103] It should be understood that the aspheric surface of each lens in the large target area 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 above gives the design data of the large-area industrial lens 100 of Example 1 of the present application, with an effective focal length EFL of 8.394 mm, a maximum field of view Fov of 73.491 degrees, a total optical length TTL of 29.218 mm, and an aperture F value F.No of 1.601.

[0105] In one embodiment provided herein, ImgH / (SAG11-SAG12)=-5.309.

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

[0107] In one embodiment provided herein, (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 herein, ET3 / (SAG31+SAG32)=-2.813.

[0114] In one embodiment provided herein, (R42+R51) / T45=73.277.

[0115] Figures 2 to 5 The optical performance of the large-surface industrial lens 100 designed with the lens combination 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] Example 2

[0118] The large-area 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. Figure 6 shown.

[0119] For 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 fourth lens 14 has 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-area industrial lens 100, ImgH represents the maximum image height of the large-target-area industrial lens 100, and EFL represents the effective focal length of the large-target-area industrial lens 100. Ai represents the correction coefficient of the in-th order aspheric surface, where i = 4, 6, 8, 10, 12, 14, or 16, and k represents the conic coefficient.

[0121] Based on the above relationship, Table 3 shows the effective focal length EFL, maximum field of view Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and conic coefficient of the large target area industrial lens 100 in Example 2, where the units of 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-surface industrial lens 100 according to the second embodiment of the present application.

[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 the following requirements:

[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 (i.e., the paraxial curvature c is the reciprocal of the curvature radius r in Table 3 above); k is the conic coefficient (given in Table 3 above); Ai is the correction coefficient of the i-th order of the aspheric surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are shown in Table 4.

[0130] It should be understood that the aspheric surface of each lens in the large target area 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 above gives the design data of the large-area industrial lens 100 of Example 2 of the present application, with an effective focal length EFL of 9.089 mm, a maximum field of view Fov of 69.173 degrees, a total optical length TTL of 25.216 mm, and an aperture F value F.No of 1.478.

[0132] In one embodiment provided herein, ImgH / (SAG11-SAG12)=-12.001.

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

[0134] In one embodiment provided herein, (R61+R62) / f6=-0.923.

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

[0136] In one embodiment provided in this 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 herein, ET3 / (SAG31+SAG32)=-2.361.

[0141] In one embodiment provided herein, (R42+R51) / T45=82.310.

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

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

[0144] Example 3

[0145] The large-area 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. Figure 11 shown.

[0146] For 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 fourth lens 14 has 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-area industrial lens 100, ImgH represents the maximum image height of the large-target-area industrial lens 100, and EFL represents the effective focal length of the large-target-area industrial lens 100. Ai represents the correction coefficient of the in-th order aspheric surface, where i = 4, 6, 8, 10, 12, 14, or 16, and k represents the conic coefficient.

[0148] Based on the above relationship, Table 5 shows the effective focal length EFL, maximum field of view Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and conic coefficient of the large target area industrial lens 100 in Example 3, where the units of 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-area industrial lens 100 according to 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 the following requirements:

[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 (i.e., the paraxial curvature c is the reciprocal of the curvature radius r in Table 5 above); k is the conic coefficient (given in Table 5 above); Ai is the correction coefficient of the i-th order of the aspheric surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are shown in Table 6.

[0158] It should be understood that the aspheric surface of each lens in the large target area 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 above gives the design data of the large-area industrial lens 100 of Example 3 of the present application, with an effective focal length EFL of 7.230 mm, a maximum field of view Fov of 82.035 degrees, a total optical length TTL of 27.337 mm, and an aperture F value F.No of 1.442.

[0160] In one embodiment provided herein, ImgH / (SAG11-SAG12)=-7.231.

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

[0162] In one embodiment provided herein, (R61+R62) / f6=-0.713.

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

[0164] In one embodiment provided in this 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 herein, ET3 / (SAG31+SAG32)=-2.009.

[0169] In one embodiment provided herein, (R42+R51) / T45=76.882.

[0170] Figures 12 to 15 The optical performance of the large-area industrial lens 100 designed with the lens combination 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] Example 4

[0173] The large-area 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. Figure 16 shown.

[0174] For 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 fourth lens 14 has 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-area industrial lens 100, ImgH represents the maximum image height of the large-target-area industrial lens 100, and EFL represents the effective focal length of the large-target-area industrial lens 100. Ai represents the correction coefficient of the in-th order aspheric surface, where i = 4, 6, 8, 10, 12, 14, or 16, and k represents the conic coefficient.

[0176] Based on the above relationship, Table 7 shows the effective focal length EFL, maximum field of view Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and conic coefficient of the large target area industrial lens 100 in Example 4, where the units of 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-surface industrial lens 100 according to 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 the following requirements:

[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 (i.e., the paraxial curvature c is the reciprocal of the curvature radius r in Table 7 above); k is the conic coefficient (given in Table 7 above); Ai is the correction coefficient of the i-th order of the aspheric surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are shown in Table 8.

[0185] It should be understood that the aspheric surface of each lens in the large target area 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 above gives the design data of the large-area industrial lens 100 of Example 4 of the present application, with an effective focal length EFL of 8.406 mm, a maximum field of view Fov of 73.413 degrees, a total optical length TTL of 27.177 mm, and an aperture F value F.No of 1.550.

[0187] In one embodiment provided herein, ImgH / (SAG11-SAG12)=-10.019.

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

[0189] In one embodiment provided herein, (R61+R62) / f6=-0.880.

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

[0191] In one embodiment provided in this 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 herein, ET3 / (SAG31+SAG32)=-1.989.

[0196] In one embodiment provided herein, (R42+R51) / T45=70.868.

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

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

[0199] Example 5

[0200] The large-area 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. Figure 21 shown.

[0201] For 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 fourth lens 14 has 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-area industrial lens 100, ImgH represents the maximum image height of the large-target-area industrial lens 100, and EFL represents the effective focal length of the large-target-area industrial lens 100. Ai represents the correction coefficient of the in-th order aspheric surface, where i = 4, 6, 8, 10, 12, 14, or 16, and k represents the conic coefficient.

[0203] Based on the above relationship, Table 9 shows the effective focal length EFL, maximum field of view Fov, total optical length TTL, aperture F value F.No, surface type, curvature radius, thickness, material refractive index and conic coefficient of the large target area industrial lens 100 in Example 5, where the units of 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-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 the following requirements:

[0211]

[0212] 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 (i.e., 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 i-th order of the aspheric surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S10 are shown in Table 10.

[0213] It should be understood that the aspheric surface of each lens in the large target area 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 above gives the design data of the large-area industrial lens 100 of Example 5 of the present application, with an effective focal length EFL of 8.934 mm, a maximum field of view Fov of 70.099 degrees, a total optical length TTL of 30.483 mm, and an aperture F value F.No of 1.602.

[0215] In one embodiment provided herein, ImgH / (SAG11-SAG12)=-8.431.

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

[0217] In one embodiment provided herein, (R61+R62) / f6=-0.845.

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

[0219] In one embodiment provided in this 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 herein, ET3 / (SAG31+SAG32)=-2.325.

[0224] In one embodiment provided herein, (R42+R51) / T45=64.504.

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

[0226] In the fifth embodiment, the large-target-area industrial lens meets the requirements of large aperture, large target area, 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 Example 1 Example 2 Example 3 Example 4 Example 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 through preferred embodiments. Those skilled in the art will appreciate that various modifications and 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; other embodiments falling within the scope of the claims of this application are intended to be protected by the invention.

Claims

1. A large-area industrial lens, characterized in that: Along the optical axis, from the object side to the image side, it consists of the following 6 lenses: A first lens having negative optical power; the object-side surface of the first lens is concave near the optical axis; A second lens element 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, the object-side surface of which is convex near the optical axis; a fifth lens element having positive refractive power, the object-side surface of which is convex near the optical axis; and a sixth lens element having negative optical power and a concave image-side surface 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-area industrial lens satisfies 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-area industrial lens according to claim 1, characterized in that: The large-area industrial lens satisfies 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-area industrial lens according to claim 1, characterized in that: The large-area industrial lens satisfies the following conditions: 9.927mm≤∑CT / N1≤13.568mm; Wherein, ΣCT is the sum of the center thicknesses of all lenses in the large-surface industrial lens; N1 is the refractive index of the first lens.

4. The large-area industrial lens according to claim 1, characterized in that: The large-area industrial lens satisfies the following conditions: -80.002mm≤(R11-R12) / Tan(Semi-FOV)≤-30.008mm; 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-surface industrial lens.

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

6. The large-area industrial lens according to claim 1, characterized in that: The large-area industrial lens satisfies 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 distance between the first lens and the second lens on the optical axis.

7. The large-area industrial lens according to claim 1, characterized in that: The large-area industrial lens satisfies the following conditions: 0.691≤f / (DT61+DT62)≤0.865; Among them, f is the total effective focal length of the large-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-area industrial lens according to claim 1, characterized in that: The large-area industrial lens satisfies 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-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-surface industrial lens.

9. The large-area industrial lens according to claim 1, characterized in that: The large-area industrial lens satisfies 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 distance between the fourth lens and the fifth lens on the optical axis.

10. An industrial lens module, characterized in that: The invention comprises the large-surface industrial lens according to any one of claims 1 to 9.

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