Vehicle-mounted side-view lens, camera device with same and driving tool

Abstract

The invention discloses a vehicle-mounted side view lens and a camera device and a driving tool with the same, the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side, the object side surface of the first lens is a convex surface, the image side surface of the first lens is a concave surface, the object side surface of the second lens is a concave surface, and the object side surface of the sixth lens is a convex surface. The object side surface of the third lens is a convex surface, the image side surface of the third lens is a convex surface, the image side surface of the fourth lens is a concave surface, the object side surface of the fifth lens is a convex surface, the image side surface of the fifth lens is a convex surface, and the fourth lens and the fifth lens are glued together; the image-side surface central region has a concave structure relative to the epitaxial region. In the temperature range of-40 DEG C to + 125 DEG C, stable imaging is still kept, the picture is clear, and the environmental requirements of vehicle regulations are met; and the structure is compact, the resolution is high, the distortion is small, and the imaging requirement of a 3 mega-pixel-level image sensor is met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of optical lenses, and particularly relates to a vehicle-mounted side-view lens, a camera device with the same, and a driving tool. BACKGROUND

[0002] The vehicle-mounted side-view system is an important visual device for assisting the driver to observe the side area of the vehicle under the working conditions of lane changing, turning, parking and the like, and is usually installed at the outside rearview mirror or fender of the vehicle body, and cooperates with the surround-view system, rear-view system and the like to build a whole vehicle visual perception system. The system collects image information of both sides of the vehicle through the side-view lens, effectively eliminates the visual blind area of the traditional mechanical outside rearview mirror, reduces the risk of side collision, and improves the driving safety and comfort.

[0003] At present, the mainstream vehicle-mounted side-view lens in the industry mostly adopts a small-sized plastic or large-volume all-glass lens structure, and generally has the following deficiencies: 1. Insufficient temperature resistance: the image clarity of the lens obviously decreases within the working interval of-40 DEG C to +95 DEG C, and the plastic material is prone to stress deformation; 2. Low relative luminance and resolution: the edge brightness is insufficient, and the imaging clarity is uneven, which affects the algorithm recognition accuracy; 3. Limited volume and complex structure: the number of lens groups in the traditional structure is large, and the machining and assembly tolerance control is difficult, resulting in poor consistency of the finished product. SUMMARY

[0004] In order to solve the problems in the prior art, the purpose of the present application is to provide a vehicle-mounted side-view lens, a camera device with the same, and a driving tool.

[0005] In order to achieve the above-mentioned purpose and achieve the above-mentioned technical effects, the technical scheme adopted by the present application is as follows: A vehicle-mounted side-view lens, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side, the first lens has a negative focal length, the object side is a convex surface, and the image side is a concave surface, the second lens has a positive focal length, the object side is a concave surface, and the image side is a convex surface, the third lens has a positive focal length, the object side is a convex surface, and the image side is a convex surface, the fourth lens has a negative focal length, and the image side is a concave surface, the fifth lens has a positive focal length, the object side is a convex surface, and the image side is a convex surface, the fourth lens and the fifth lens are cemented lenses, the sixth lens has a negative focal length, the outwardly extended region of the central region of the image side of the sixth lens protrudes towards the image side, and the central region of the image side of the sixth lens has a concave structure relative to the outwardly extended region.

[0006] Further, the vehicle-mounted side-view lens satisfies the following conditions: 8.60 < 1 / 2*FOV / Ym < 8.76 wherein, FOV is the horizontal field of view or the maximum field of view of the vehicle side mirror lens, and Ym is the image height of the vehicle side mirror lens corresponding to FOV.

[0007] Further, the vehicle side mirror lens satisfies the following condition: 5.178 < TTL / f < 5.330 wherein, TTL is the distance from the lens vertex of the first lens to the image plane, and f is the overall focal length of the vehicle side mirror lens.

[0008] Further, the vehicle side mirror lens satisfies the following condition: 2.49 < 2*D1 / f < 2.57 wherein, 2*D1 is the effective diameter of the first lens, and f is the overall focal length of the vehicle side mirror lens.

[0009] Further, the vehicle side mirror lens satisfies the following condition: Y1*180 / pi > 3.268 wherein, Y1 is the image height of the vehicle side mirror lens when the half field of view is 1°, and pi is the circular constant.

[0010] Further, the vehicle side mirror lens satisfies the following condition: 0.175 > BFL / TTL > 0.135 wherein, BFL is the distance from the center of the image side surface of the sixth lens of the vehicle side mirror lens to the imaging plane of the vehicle side mirror lens on the optical axis, and TTL is the distance from the lens vertex of the first lens to the image plane.

[0011] Further, the vehicle side mirror lens satisfies the following condition: -1.65 ≤ f1 / f ≤ -1.34 4.49 ≤ f2 / f ≤ 6.27 1.49 ≤ f3 / f ≤ 2.06 -1.94 ≤ f4 / f ≤ -1.31 1.11 ≤ f5 / f ≤ 1.71 -72.77 ≤ f6 / f ≤ -7.62 wherein, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f is the overall focal length of the vehicle side mirror lens.

[0012] Further, the material refractive index Nd1 of the first lens satisfies 1.57Nd1≤1.87, the material Abbe number Vd1 of the first lens satisfies 49.5Vd1≤55.45; the material refractive index Nd2 of the second lens satisfies 1.44Nd2≤1.74, the material Abbe number Vd2 of the second lens satisfies 22.6Vd2≤64.4; the material refractive index Nd3 of the third lens satisfies 1.52Nd3≤1.98, the material Abbe number Vd3 of the third lens satisfies 38.2Vd3≤64.48; the material refractive index Nd5 of the fifth lens satisfies 1.52Nd5≤1.84, the material Abbe number Vd5 of the fifth lens satisfies 49.20Vd5≤63.51; the material refractive index Nd5 of the sixth lens satisfies 1.44Nd5≤1.74, the material Abbe number Vd5 of the sixth lens satisfies 23.45Vd5≤56.15.

[0013] The application further discloses a vehicle-mounted side-view camera lens.

[0014] The application further discloses a driving tool, which comprises the vehicle-mounted side-view camera lens.

[0015] Compared with the prior art, the application has the following beneficial effects: 1) The imaging is stable and the picture is clear in the temperature range of -40 DEG C to +125 DEG C, and the vehicle regulation environment requirement is met; 2) The thermal stability and mechanical impact resistance are significantly improved through the glass-plastic hybrid lens structure and the optimized cemented lens design; 3) The system sensitivity is effectively reduced, the number of reflection surfaces is reduced, and the transmittance and relative luminance are improved through the double-cemented lens structure; 4) The structure is compact, the resolving power is high, and the distortion is small, and the imaging requirement of the 3 million pixel level image sensor is met. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a structural schematic diagram of embodiment 1 of the application; Figure 2 Fig. 2 is a -40 DEG C temperature analysis curve diagram of embodiment 1 of the application; Figure 3 Fig. 3 is a 25 DEG C temperature analysis curve diagram of embodiment 1 of the application; Figure 4 Fig. 4 is a 125 DEG C temperature analysis curve diagram of embodiment 1 of the application; Figure 5 Fig. 5 is an OTF VS Field curve diagram of embodiment 1 of the application; Figure 6 Fig. 6 is a relative luminance diagram of embodiment 1 of the application; Figure 7 Structure diagram of embodiment 2 of the present application; Figure 8 Temperature analysis curve graph of embodiment 2 of the present application at -40℃; Figure 9 Temperature analysis curve graph of embodiment 2 of the present application at 25℃; Figure 10 Temperature analysis curve graph of embodiment 2 of the present application at 125℃; Figure 11 OTF VS Field curve graph of embodiment 2 of the present application; Figure 12 Relative luminance graph of embodiment 2 of the present application; Figure 13 Structure diagram of embodiment 3 of the present application; Figure 14 Temperature analysis curve graph of embodiment 3 of the present application at -40℃; Figure 15 Temperature analysis curve graph of embodiment 3 of the present application at 25℃; Figure 16 Temperature analysis curve graph of embodiment 3 of the present application at 125℃; Figure 17 OTF VS Field curve graph of embodiment 3 of the present application; Figure 18 Relative luminance graph of embodiment 3 of the present application. DETAILED DESCRIPTION

[0017] The present application will be described in detail below so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the scope of protection of the present application can be more clearly defined.

[0018] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

[0019] As Figures 1-18 shown, the present application discloses a vehicle-mounted side mirror head, comprising a first lens 1, a second lens 2, a third lens 4, a fourth lens 5, a fifth lens 6 and a sixth lens 7 arranged in sequence from the object side to the image side, wherein a diaphragm 3 is arranged between the second lens 2 and the third lens 4, and a filter 8 and an image plane IMA 9 are arranged on the image side of the sixth lens 7.

[0020] In some embodiments, the first lens 1, the third lens 4, the fourth lens 5 and the fifth lens 6 are spherical lenses, and the second lens 2 and the sixth lens 7 are aspherical lenses.

[0021] In some embodiments, the first lens 1, the third lens 4, the fourth lens 5 and the fifth lens 6 are made of glass, and the second lens 2 and the sixth lens 7 are made of plastic.

[0022] In some embodiments, the first lens 1 has a negative focal power, the object side is convex, the image side is concave, and has a meniscus structure, which is used to diverge the incident light, correct the distortion of the image field edge and improve the field uniformity; the second lens 2 has a positive focal power and is an aspherical lens made of plastic, the object side is concave, the image side is convex, which is used to converge light, correct spherical aberration and coma, and the aspherical design helps to reduce the system length while maintaining high imaging quality; the third lens 4 has a positive focal power and is a spherical lens, the object side is convex, the image side is convex, which is mainly used to further converge light and improve the central field of view imaging clarity; the fourth lens 5 has a negative focal power, the object side is convex or concave, the image side is concave, the fifth lens 6 has a positive focal power, the object side is convex, the image side is convex, the fourth lens 5 and the fifth lens 6 are cemented lenses, which can effectively correct chromatic aberration, reduce ghost reflection and improve the assembly stability of the system; the sixth lens 7 has a negative focal power and is an aspherical lens made of plastic, the aspherical structure helps to correct the curvature and distortion of the image surface, further improves the edge imaging quality and reduces the system sensitivity.

[0023] In some embodiments, the material refractive index Nd1 of the first lens 1 satisfies 1.57 < Nd1 ≤ 1.87, and the material Abbe number Vd1 satisfies 49.5 < Vd1 ≤ 55.45; the material refractive index Nd2 of the second lens 2 satisfies 1.44 ≤ Nd2 ≤ 1.74, and the material Abbe number Vd2 satisfies 22.6 ≤ Vd2 ≤ 64.4; the material refractive index Nd3 of the third lens 4 satisfies 1.52 ≤ Nd3 ≤ 1.98, and the material Abbe number Vd3 satisfies 38.2 ≤ Vd3 ≤ 64.48; the material refractive index Nd5 of the fifth lens 6 satisfies 1.52 ≤ Nd5 ≤ 1.84, and the material Abbe number Vd5 satisfies 49.20 ≤ Vd5 ≤ 63.51; the material refractive index Nd5 of the sixth lens 7 satisfies 1.44 ≤ Nd5 ≤ 1.74, and the material Abbe number Vd5 satisfies 23.45 ≤ Vd5 ≤ 56.15.

[0024] In some embodiments, the vehicle-mounted side mirror lens of the present application satisfies the following conditions: -1.65 ≤ f1 / f ≤ -1.34 4.49 ≤ f2 / f ≤ 6.27 1.49 ≤ f3 / f ≤ 2.06 -1.94≤f4 / f≤-1.31 1.11≤f5 / f≤1.71 -72.77≤f6 / f≤-7.62 Wherein, f1 is the focal length of the first lens 1, f2 is the focal length of the second lens 2, f3 is the focal length of the third lens 4, f4 is the focal length of the fourth lens 5, f5 is the focal length of the fifth lens 6, f6 is the focal length of the sixth lens 7, and f is the overall focal length of the vehicle side-view lens.

[0025] In some embodiments, the vehicle side-view lens of the present application satisfies the following conditions: 8.60<1 / 2*FOV / Ym<8.76 Wherein, FOV is the horizontal field of view or the maximum field of view of the vehicle side-view lens, and Ym is the image height of the vehicle side-view lens corresponding to FOV.

[0026] In some embodiments, the vehicle side-view lens of the present application satisfies the following conditions: 5.178<TTL / f<5.330 Wherein, TTL is the distance from the lens vertex of the first lens 1 to the image plane.

[0027] In some embodiments, the vehicle side-view lens of the present application satisfies the following conditions: 2.49<2*D1 / f<2.57 Wherein, 2*D1 is the effective diameter of the first lens 1.

[0028] In some embodiments, the vehicle side-view lens of the present application satisfies the following conditions: Y1*180 / pi>3.268 Wherein, Y1 is the image height of the vehicle side-view lens when the half field of view is 1°, and pi is the circular constant.

[0029] In some embodiments, the vehicle side-view lens of the present application satisfies the following conditions: 0.175>BFL / TTL>0.135 Wherein, BFL is the distance from the center of the image side surface of the sixth lens to the imaging plane of the vehicle side-view lens on the optical axis, and TTL is the distance from the lens vertex of the first lens 1 to the image plane. Further, 0.175>BFL / TTL>0.139, which is beneficial to increase the optical back focal length of the lens and leave sufficient space for the module.

[0030] The defocus amount of the vehicle side-view lens of the present application is less than 9.61 μm at high temperature +125℃ and low temperature -40℃, which ensures that the lens can shoot high-definition pictures at high temperature +125℃ and low temperature -40℃.

[0031] Embodiment 1 As Figure 1 shown in FIG. 1, a vehicle-mounted side mirror head has six lenses, including first lens 1, second lens 2, third lens 4, fourth lens 5, fifth lens 6 and sixth lens 7 arranged in order from the object side to the image side, wherein a diaphragm 3 is arranged between the second lens 2 and the third lens 4, and a filter 8 and an image plane IMA 9 are arranged on the image side of the sixth lens 7.

[0032] In this embodiment, the first lens 1, the third lens 4, the fourth lens 5 and the fifth lens 6 are spherical lenses made of glass, and the second lens 2 and the sixth lens 7 are aspherical lenses made of plastic.

[0033] The first lens 1 has a negative focal power, the object side is convex, the image side is concave, and has a meniscus structure, which is used to diverge incident light, correct the distortion of the image field edge and improve the consistency of the field of view; the second lens 2 has a positive focal power and is an aspherical lens made of plastic, the object side is concave, and the image side is convex, which plays a role in converging light, correcting spherical aberration and coma, and the aspherical design helps to reduce the system length while maintaining high imaging quality; the third lens 4 has a positive focal power and is a spherical lens, the object side is convex, and the image side is convex, which is mainly used to further converge light and improve the imaging clarity of the central field of view; the fourth lens 5 has a negative focal power, and the image side is concave; the fifth lens 6 has a positive focal power, the object side is convex, and the image side is convex; the fourth lens 5 and the fifth lens 6 are cemented lenses, which can effectively correct chromatic aberration, reduce ghost reflection and improve the assembly stability of the system; the sixth lens 7 has a negative focal power and is an aspherical lens made of plastic, and the aspherical structure helps to correct the curvature and distortion of the image plane, further improves the edge imaging quality and reduces the sensitivity of the system.

[0034] In this embodiment, the optical parameters of each lens, diaphragm 3, filter 8 and image plane IMA 9 are shown in Table 1.

[0035] Table 1 In Table 1, when the radius of curvature is Infinity, it means that the surface is a plane.

[0036] In this embodiment, the lens focal length information table and other optical information table are shown in Table 2.

[0037] Table 2 The aspherical surface in the lens is described as follows: z=(cr 2 ) / {1+[1-(k+1)(c 2r 2 )]1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 wherein k is a conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance of a point on the aspherical curve from the optical axis, and z is the aspherical depth (the perpendicular distance between a point on the aspherical surface at a distance r from the optical axis and a tangent plane at the vertex of the aspherical surface). For convenience, the aspherical surface of each lens surface uses the aspherical surface shown in the above formula. However, the present application is not limited to the aspherical polynomial form represented by the formula.

[0038] The aspherical surface coefficient values of each surface are shown in Table 3.

[0039] Table 3 Figure 2 the -40℃ temperature analysis curve of Example 1, Figure 3 the 25℃ temperature analysis curve of Example 1, Figure 4 the 125℃ temperature analysis curve of Example 1. From the above Figures 2-4 it can be seen that the vehicle side mirror lens of Example 1 has a defocus amount of less than 9.61 μm at high temperature +125℃ and low temperature 40℃, and such a small defocus amount ensures that the lens can shoot high-definition pictures at high temperature +125℃ and low temperature 40℃.

[0040] Figure 5 the MTF VS Field curve of Example 1, the vertical coordinate is the MTF value, the horizontal coordinate is the field of view, and the unit is millimeter, reflecting the resolving power of the lens, and the curve MTF value of 100 LP / mm at 1.8 mm is greater than 0.6, which can reflect that the lens has high resolving power and clear imaging.

[0041] Figure 6 the relative luminance diagram of Example 1, indicating the relative luminance values corresponding to different fields of view, the vertical coordinate is the relative luminance, the horizontal coordinate is the field of view, and the unit is millimeter, 0 is the central field of view, and its relative luminance is 100%, 3.7 mm represents the edge field of view, and its relative luminance is greater than 45%, having a relatively high relative luminance, which can ensure the uniformity of the overall picture, and there will be no dark corners even at the edge of the picture.

[0042] Embodiment 2 As shown in Figures 7-12 Fig. 1, a vehicle-mounted side mirror head with six lenses includes, in order from the object side to the image side, a first lens 1, a second lens 2, a third lens 4, a fourth lens 5, a fifth lens 6, and a sixth lens 7, wherein a diaphragm 3 is arranged between the second lens 2 and the third lens 4, and a filter 8 and an image plane IMA 9 are arranged on the image side of the sixth lens 7.

[0043] In this embodiment, the first lens 1, the third lens 4, the fourth lens 5, and the fifth lens 6 are spherical lenses made of glass, and the second lens 2 and the sixth lens 7 are aspherical lenses made of plastic.

[0044] The first lens 1 has a negative focal power, with a convex object side and a concave image side, and has a meniscus structure, for diverging incident light, correcting the distortion of the image field edge, and improving the consistency of the field of view; the second lens 2 has a positive focal power and is an aspherical lens made of plastic, with a concave object side and a convex image side, for converging light, correcting spherical aberration and coma, and the aspherical design helps to reduce the system length while maintaining high imaging quality; the third lens 4 has a positive focal power and is a spherical lens, with a convex object side and a convex image side, mainly for further converging light and improving the imaging clarity of the central field of view; the fourth lens 5 has a negative focal power, with a concave object side and a concave image side, and the fifth lens 6 has a positive focal power, with a convex object side and a convex image side, and the fourth lens 5 and the fifth lens 6 are cemented lenses, which can effectively correct chromatic aberration, reduce ghost reflection surfaces, and improve the assembly stability of the system; the sixth lens 7 has a negative focal power and is an aspherical lens made of plastic, and the aspherical structure helps to correct the curvature and distortion of the image plane, further improves the edge imaging quality, and reduces the sensitivity of the system.

[0045] In this embodiment, the optical parameters of each lens, the diaphragm 3, the filter 8, and the image plane IMA 9 are shown in Table 4.

[0046] Table 4 In Table 4, when the radius of curvature is Infinity, it means that the surface is a plane.

[0047] In this embodiment, the lens focal length information table and other optical information table are shown in Table 5.

[0048] Table 5 The aspherical surface in the lens is described as follows: z=(cr 2 ) / {1+[1-(k+1)(c2 r 2 )]1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 wherein k is a conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance of a point on the aspherical curve from the optical axis, and z is the aspherical depth (the perpendicular distance between a point on the aspherical curve at a distance r from the optical axis and a tangent plane at the vertex of the aspherical surface). For convenience, the aspherical surface of each lens surface uses the aspherical surface shown in the above formula. However, the present application is not limited to the aspherical polynomial form represented by the formula.

[0049] The aspherical surface coefficient values of each surface are shown in Table 6.

[0050] Table 6 Figure 8 The -40℃ temperature analysis graph of Example 2, Figure 9 The 25℃ temperature analysis graph of Example 2, Figure 10 The 125℃ temperature analysis graph of Example 2. From Figures 8-10 It can be seen that the vehicle side mirror lens of Example 2 has a defocus amount of less than 9.61 μm at high temperature +125℃ and low temperature 40℃, and such a small defocus amount ensures that the lens can shoot high-definition pictures at high temperature +125℃ and low temperature 40℃.

[0051] Figure 11 The MTF VS Field graph of Example 2, the vertical coordinate is the MTF value, the horizontal coordinate is the field of view in millimeters, and reflects the resolving power of the lens. The curve MTF value of 100 LP / mm is greater than 0.6 at 1.8 mm, which can reflect that the resolving power of the lens is high and the image is clear.

[0052] Figure 12For the relative luminance diagram of Example 2, the relative luminance values corresponding to different fields of view are shown, the vertical coordinate is the relative luminance, the horizontal coordinate is the field of view, the unit is millimeter, 0 is the central field of view, the relative luminance thereof is 100%, 3.7mm represents the edge field of view, the relative luminance thereof is greater than 45%, has a higher relative luminance, and can ensure the uniformity of the overall picture, and there will be no dark corners even at the edge of the picture.

[0053] Example 3 As shown in Figures 13-18 A vehicle-mounted side mirror head, the number of lenses thereof is six, including first lens 1, second lens 2, third lens 4, fourth lens 5, fifth lens 6 and sixth lens 7 arranged in sequence from the object side to the image side, wherein the diaphragm 3 is arranged between the second lens 2 and the third lens 4, and the filter 8 and the image plane IMA 9 are arranged on the image side of the sixth lens 7.

[0054] In this embodiment, the first lens 1, the third lens 4, the fourth lens 5 and the fifth lens 6 are spherical lenses, which are made of glass material, and the second lens 2 and the sixth lens 7 are aspherical lenses, which are made of plastic material.

[0055] The first lens 1 has negative focal power, the object side thereof is a convex surface, and the image side thereof is a concave surface, which is in a meniscus structure, so as to diverge the incident light, correct the distortion of the image field edge and improve the consistency of the field of view; the second lens 2 has positive focal power, which is an aspherical lens made of plastic material, the object side thereof is a concave surface, and the image side thereof is a convex surface, which plays a role in converging light, correcting spherical aberration and coma, and the aspherical design thereof helps to reduce the system length while maintaining high imaging quality; the third lens 4 has positive focal power, which is a spherical lens, the object side thereof is a convex surface, and the image side thereof is a convex surface, which is mainly used for further converging light and improving the imaging clarity of the central field of view; the fourth lens 5 has negative focal power, the object side thereof is a convex surface, and the image side thereof is a concave surface, the fifth lens 6 has positive focal power, the object side thereof is a convex surface, and the image side thereof is a convex surface, the fourth lens 5 and the fifth lens 6 are cemented lenses, which can effectively correct chromatic aberration, reduce ghost reflection surface and improve the assembly stability of the system; the sixth lens 7 has negative focal power, which is an aspherical lens made of plastic material, and the aspherical structure thereof helps to correct the curvature and distortion of the image plane, further improves the edge imaging quality and reduces the system sensitivity.

[0056] In this embodiment, the optical parameters of each lens, diaphragm 3, filter 8 and image plane IMA 9 are shown in Table 7.

[0057] Table 7 In Table 7, when the radius of curvature is Infinity, it means that the surface is a plane.

[0058] In this embodiment, the lens focal length information table and other optical information table refer to Table 8.

[0059] Table 8 The aspheric surface in the lens is described as follows: z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )]1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 Wherein, k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the vertical distance of a point on the aspheric curve from the optical axis, and z is the aspheric depth (the vertical distance between the point on the aspheric surface with a distance of r from the optical axis and the tangent plane tangent to the vertex of the aspheric surface on the optical axis). For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the above formula. However, the present application is not limited to the aspheric polynomial form represented by the formula.

[0060] The aspheric coefficients of each surface are shown in Table 9.

[0061] Table 9 Figure 14 The -40℃ temperature analysis curve of Example 3 is shown in FIG. 1, Figure 15 The 25℃ temperature analysis curve of Example 3 is shown in FIG. 2, Figure 16 The 125℃ temperature analysis curve of Example 3 is shown in FIG. 3. It can be seen that the vehicle-mounted side mirror lens of Example 3 has a defocus amount of less than 9.61μm at high temperature +125℃ and low temperature Figures 14-16 40℃, and such a small defocus amount ensures that the lens can shoot high-definition pictures at high temperature +125℃ and low temperature 40℃.

[0062] Figure 17 The MTF VS Field curve of Example 3 is shown in FIG. 4, the vertical coordinate is the MTF value, the horizontal coordinate is the field of view, and the unit is millimeter. The curve reflects the resolving power of the lens, and the MTF value of 100LP / mm at 1.8mm is greater than 0.6, which can reflect that the resolving power of the lens is high and the imaging is clear.​

[0063] Figure 18 For the relative luminance diagram of Example 3, the relative luminance values corresponding to different fields of view are shown, the vertical coordinate is relative luminance, the horizontal coordinate is field of view, the unit is millimeter, 0 is the central field of view, the relative luminance thereof is 100%, 3.7mm represents the edge field of view, the relative luminance thereof is greater than 45%, has a higher relative luminance, and the uniformity of the overall picture can be ensured, and there is no dark corner even at the picture edge.

[0064] The parts or structures not specifically described in the present application can adopt the prior art or existing products, and will not be described here.

[0065] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A vehicle-mounted side-view camera, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side, wherein the first lens has negative optical power, its object-side surface is convex, and its image-side surface is concave; the second lens has positive optical power, its object-side surface is concave, and its image-side surface is convex; characterized in that... The third lens has positive optical power, and its object side and image side are convex. The fourth lens has negative optical power, and its image side is concave. The fifth lens has positive optical power, and its object side and image side are convex. The fourth and fifth lenses are cemented lenses. The sixth lens has negative optical power, and the outer region extending outward from the central region of the image side of the sixth lens convexes towards the image. The central region of the image side of the sixth lens has a concave structure relative to the outer region.

2. The vehicle-mounted side-view camera according to claim 1, characterized in that, The vehicle-mounted side-view camera meets the following conditions: 8.60<1 / 2*FOV / Y m <8.76 Wherein, FOV is the horizontal field of view or maximum field of view of the vehicle-mounted side-view camera, Y m This refers to the image height of the vehicle-mounted side-view camera corresponding to the field of view (FOV).

3. A vehicle-mounted side-view camera according to claim 1, characterized in that, The vehicle-mounted side-view camera meets the following conditions: 5.178 <TTL / f<5.330 Where TTL is the distance from the vertex of the first lens to the image plane, and f is the total focal length of the vehicle-mounted side-view lens.

4. A vehicle-mounted side-view camera according to claim 1, characterized in that, The vehicle-mounted side-view camera meets the following conditions: 2.49 < 2 * D1 / f < 2.57 Where 2*D1 is the effective diameter of the first lens, and f is the total focal length of the vehicle-mounted side-view lens.

5. A vehicle-mounted side-view camera according to claim 1, characterized in that, The vehicle-mounted side-view camera meets the following conditions: Y1*180 / pi>3.268 Where Y1 is the image height of the vehicle-mounted side-view camera when the half-field angle is 1°, and pi is pi.

6. A vehicle-mounted side-view camera according to claim 1, characterized in that, The vehicle-mounted side-view camera meets the following conditions: 0.175 > BFL / TTL > 0.135 Wherein, BFL is the distance on the optical axis from the center of the image side of the sixth lens of the vehicle side-view camera to the imaging surface of the vehicle side-view camera, and TTL is the distance from the vertex of the first lens to the image surface.

7. A vehicle-mounted side-view camera according to claim 1, characterized in that, The vehicle-mounted side-view camera meets the following conditions: -1.65≤f1 / f≤-1.34 4.49≤f² / f≤6.27 1.49≤f³ / f≤2.06 -1.94≤f4 / f≤-1.31 1.11≤f5 / f≤1.71 -72.77≤f6 / f≤-7.62 Where f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f is the total focal length of the vehicle side-view lens group.

8. A vehicle-mounted side-view camera according to claim 1, characterized in that, The first lens has a refractive index Nd1 satisfying 1.57 < Nd1 ≤ 1.87 and an Abbe constant Vd1 satisfying 49.5 < Vd1 ≤ 55.45; the second lens has a refractive index Nd satisfying 1.44 ≤ Nd2 ≤ 1.74 and an Abbe constant Vd2 satisfying 22.6 ≤ Vd2 ≤ 64.4; the third lens has a refractive index Nd satisfying 1.52 ≤ Nd3 ≤ 1.98 and an Abbe constant Vd4 satisfying 38.2 ≤ Vd3 ≤ 64.48; the fifth lens has a refractive index Nd satisfying 1.52 ≤ Nd5 ≤ 1.84 and an Abbe constant Vd5 satisfying 49.20 ≤ Vd5 ≤ 63.51; and the sixth lens has a refractive index Nd satisfying 1.44 ≤ Nd5 ≤ 1.74 and an Abbe constant Vd5 satisfying 23.45 ≤ Vd5 ≤ 56.

15.

9. A camera device, characterized in that, Including a vehicle-mounted side-view camera as described in any one of claims 1-8.

10. A driving tool, characterized in that, Includes a vehicle-mounted side-view camera as described in any one of claims 1-8, wherein the driving vehicle is a vehicle, ship, aircraft, or drone.

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