Broadband target detection optical lens, camera device and driving tool with same

Abstract

The utility model discloses a broadband detection target optical lens, camera device and driving tool with the camera device, the optical lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along the optical axis from the object side to the image side, the first lens has negative focal power, the object side surface of the first lens is a convex surface, the image side surface of the first lens is a concave surface, and the fifth lens has negative focal power. The second lens has positive focal power, the object side surface of which is a concave surface and the image side surface of which is a convex surface, the third lens has positive focal power, the object side surface of which is a convex surface and the image side surface of which is a convex surface, the fourth lens has negative focal power, the object side surface of which is a concave surface and the image side surface of which is a concave surface, and the fifth lens has positive focal power, the object side surface of which is a convex surface and the image side surface of which is a convex surface; the optical lens satisfies that TTL / f is greater than or equal to 8 and less than or equal to 20. The optical lens provided by the utility model has the advantages of high relative illumination, high resolution and clear imaging, can shoot high-definition pictures in a range of-40 DEG C to + 85 DEG C, and is suitable for popularization and application in the fields of automobiles and automatic driving.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical lenses, and in particular relates to a wide-band target detection optical lens, a camera device and a driving tool with the same. Background Art

[0002] To improve vehicle safety, in-vehicle cameras have proliferated in recent years, including front-view, surround-view, side-view, and rear-view cameras, significantly increasing the diversity of driver assistance functions. Real-time images transmitted by these cameras allow drivers to instantly detect obstacles in front, behind, to the left, and to the right of the vehicle, significantly reducing the risk of accidents.

[0003] However, the current wide-band wide-angle lens has a small aperture and low illumination. In dim conditions, it is not effective in detecting scenes. In addition, the field of view angle has not yet reached its limit, the resolution is low, and the subsequent chip algorithm development is highly complex. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a wide-band target detection optical lens, a camera device and a driving tool having the same.

[0005] In order to achieve the above purpose and the above technical effects, the technical solution adopted by the present invention is:

[0006] An optical lens for detecting a target in a wide band, comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side along an optical axis;

[0007] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0008] The second lens has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0009] The third lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex;

[0010] The fourth lens has negative optical power, and its object-side surface and image-side surface are concave;

[0011] The fifth lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex;

[0012] The wide-band detection target optical lens satisfies the following conditional formula:

[0013] 8≤TTL / f≤20;

[0014] Wherein, TTL is the distance on the optical axis from the center of the object-side surface of the first lens to the imaging surface of the wide-band detection target optical lens.

[0015] Furthermore, the wide-band detection target optical lens satisfies the following conditional formula:

[0016] 0.5≤|H / f1|≤2.1;

[0017] Wherein, H is the image height corresponding to the maximum field angle of the optical lens for wide-band detection of the target, and f1 is the focal length of the first lens.

[0018] Furthermore, the wide-band detection target optical lens satisfies the following conditional formula:

[0019] 0.02≤|f / R1|≤0.2;

[0020] Wherein, R1 is the curvature radius of the object side surface of the first lens.

[0021] Furthermore, the wide-band detection target optical lens satisfies the following conditional formula:

[0022] 1.3≤BFL / f≤3.2;

[0023] Wherein, BFL is the distance on the optical axis from the center of the image side surface of the fifth lens to the imaging surface of the wide-band detection target optical lens.

[0024] Furthermore, the wide-band detection target optical lens satisfies the following conditional formula:

[0025] 11≤2*D1 / f≤22;

[0026] Wherein, 2*D1 is the effective diameter of the first lens.

[0027] Furthermore, the wide-band detection target optical lens satisfies the following conditional formula:

[0028] 0.4≤Y1*180 / pi≤1.2;

[0029] Wherein, Y1 is the lens image height corresponding to a half field of view angle of 1°, and pi is the pi.

[0030] Furthermore, the first lens and the third lens are spherical lenses, and the second lens, the fourth lens and the fifth lens are aspherical lenses.

[0031] Furthermore, the fifth lens has a refractive index temperature coefficient not greater than -5.9*10 -6 / ℃ plastic material.

[0032] The utility model also discloses a camera device, comprising the above-mentioned wide-band target detection optical lens.

[0033] The utility model also discloses a driving tool, comprising the camera device as described above, wherein the driving tool is a vehicle, a ship, an airplane or a drone.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] The utility model discloses a wide-band target detection optical lens, a camera device, and a driving tool having the same. The wide-band target detection optical lens has a small head size, high relative illumination, and sufficient light input. At a full field angle of 166.9°, the relative illumination is greater than 0.58, and the resolution and clarity are high, with clear imaging. At a resolution spatial frequency of 60lp / mm, the MTF (Modulation Transfer Function) is greater than 0.7. High-definition images can be captured within the range of -40°C to +85°C, the temperature resistance is good, and the target detection and recognition capabilities are greatly improved. At the same time, by gluing the fourth lens and the fifth lens together, the sensitivity of the optical lens is reduced, and the tool is suitable for promotion and application in the fields of automobiles and autonomous driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0037] Figure 2 This is the OTF modulus curve of Example 1 of the present invention under the Y field of view at a temperature of -40°C;

[0038] Figure 3 This is the OTF modulus curve of Example 1 of the present invention under the Y field of view at a temperature of 25°C;

[0039] Figure 4 This is the OTF modulus curve of Example 1 of the present invention under the Y field of view at a temperature of 85°C;

[0040] Figure 5 This is a relative illumination diagram of Example 1 of the present utility model;

[0041] Figure 6 This is a schematic structural diagram of Example 2 of the present utility model;

[0042] Figure 7 This is the OTF modulus curve of Example 2 of the present invention under the Y field of view at a temperature of -40°C;

[0043] Figure 8 This is the OTF modulus curve of Example 2 of the present invention under the Y field of view at a temperature of 25°C;

[0044] Figure 9This is the OTF modulus curve of Example 2 of the present invention under the Y field of view at a temperature of 85°C;

[0045] Figure 10 This is a relative illumination diagram of Example 2 of the present utility model. DETAILED DESCRIPTION

[0046] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0047] The following is a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceivable aspects and is neither intended to identify key or critical elements of all aspects nor to define 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 will be provided later.

[0048] like Figure 1-10 As shown, a wide-band target detection optical lens has five lenses, including a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5 arranged in sequence from the object side to the image side along the optical axis. An aperture 6 can be set between the third lens 3 and the fourth lens 4 or between the second lens 2 and the third lens 3. A filter 7 and an imaging surface 8 are set on the image side of the fifth lens 5.

[0049] The first lens 1 has negative refractive power, and its object-side surface is convex and its image-side surface is concave.

[0050] The second lens 2 has positive refractive power, its object side surface is concave, and its image side surface is convex, which is conducive to smoother refracted light, reduced aberration, and lowered lens sensitivity.

[0051] The third lens 3 has positive refractive power, and its object-side surface and image-side surface are convex.

[0052] The fourth lens element 4 has negative refractive power, and its object-side surface and image-side surface are concave.

[0053] The fifth lens 5 has positive refractive power, and its object-side surface and image-side surface are convex, which is beneficial to increasing the solid angle of the imaging beam and improving the relative illumination of the imaging surface.

[0054] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0055] 8≤TTL / f≤20;

[0056] Wherein, TTL is the distance on the optical axis from the center of the object-side surface of the first lens to the imaging surface of the wide-band detection target optical lens.

[0057] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0058] 0.02≤|f / R1|≤0.2;

[0059] Wherein, R1 is the curvature radius of the object side surface of the first lens.

[0060] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0061] 1.3≤BFL / f≤3.2;

[0062] Wherein, BFL is the distance on the optical axis from the center of the image side surface of the fifth lens to the imaging surface of the wide-band detection target optical lens.

[0063] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0064] 11≤2*D1 / f≤22;

[0065] Wherein, 2*D1 is the effective diameter of the first lens.

[0066] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0067] 0.4≤Y1*180 / pi≤1.2;

[0068] Wherein, Y1 is the lens image height corresponding to a half field of view angle of 1°, and pi is the pi.

[0069] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0070] 0.5≤|H / f1|≤2.1;

[0071] Wherein, H is the image height corresponding to the maximum field angle of the optical lens for wide-band detection of the target, and f1 is the focal length of the first lens 1.

[0072] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0073] 0.05≤|H / f2|≤0.6;

[0074] Wherein, H is the image height corresponding to the maximum field angle of the wide-band detection target optical lens, and f2 is the focal length of the second lens 2.

[0075] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0076] 0.3≤|H / f3|≤1.5;

[0077] Wherein, H is the image height corresponding to the maximum field angle of the wide-band detection target optical lens, and f3 is the focal length of the third lens 3.

[0078] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0079] 1.5≤|H / f4|≤2.5;

[0080] Wherein, H is the image height corresponding to the maximum field angle of the wide-band detection target optical lens, and f4 is the focal length of the fourth lens 4.

[0081] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0082] 1.4≤|H / f5|≤2.5;

[0083] Wherein, H is the image height corresponding to the maximum field angle of the wide-band detection target optical lens, and f5 is the focal length of the fifth lens 5.

[0084] In some embodiments, the wide-band detection target optical lens satisfies the following conditional formula:

[0085] 54≤(FOV×f) / H≤66;

[0086] Among them, FOV is the maximum field of view angle of the wide-band detection target optical lens, and f is the total effective focal length of the wide-band detection target optical lens.

[0087] In some embodiments, the first lens 1 and the third lens 3 are spherical lenses, and the second lens 2 , the fourth lens 4 , and the fifth lens 5 are aspherical lenses.

[0088] In some embodiments, the fifth lens has a refractive index temperature coefficient not greater than -5.9*10 -6 / ℃ plastic material to offset the effect of high temperature focal plane deviation toward the object plane caused by the positive dn / dt refractive index temperature coefficient of high refractive index and high Abbe material.

[0089] The utility model also discloses a camera device, comprising the above-mentioned wide-band target detection optical lens.

[0090] The utility model also discloses a driving tool, comprising the camera device as described above, wherein the driving tool is a vehicle, a ship, an airplane or a drone.

[0091] Example 1

[0092] like Figure 1-5 As shown, a wide-band target detection optical lens has five lenses, including a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5 arranged in sequence from the object side to the image side along the optical axis.

[0093] The first lens 1 has a negative focal power, its object side surface is convex, and the image side surface is concave; the second lens 2 has a positive focal power, its object side surface is concave, and the image side surface is convex, which is conducive to smoother refracted light, reduced aberration, and lowered lens sensitivity; the third lens 3 has a positive focal power, its object side surface is convex, and the image side surface is convex; a stop 6 is provided between the third lens 3 and the fourth lens 4, which is conducive to reducing the lens aperture; the fourth lens 4 has a negative focal power, its object side surface is concave, and the image side surface is concave; the fifth lens 5 has a positive focal power, its object side surface is convex, and the image side surface is convex, which is conducive to increasing the solid angle of the imaging beam and improving the relative illumination of the imaging surface; the fourth lens 4 and the fifth lens 5 are a cemented lens, which is conducive to correcting chromatic aberration, reducing ghost reflections, reducing assembly sensitivity, and increasing the image surface size; the image side of the fifth lens 5 is provided with a filter 7 and an imaging surface 8.

[0094] Figure 1 , symbol S1 represents the object-side surface of the first lens 1, S2 represents the image-side surface of the first lens 1; S3 represents the object-side surface of the second lens 2, S4 represents the image-side surface of the second lens 2; S5 represents the object-side surface of the third lens 3, S6 represents the image-side surface of the third lens 3; S7 represents the surface of the aperture 6; S8 represents the object-side surface of the fourth lens 4, S9 represents the image-side surface of the fourth lens 4, and also represents the object-side surface of the fifth lens 5 cemented to the fourth lens 4, S10 represents the image-side surface of the fifth lens 5; S11 represents the object-side surface of the filter 7, S12 represents the image-side surface of the filter 7; S13 represents the surface where the imaging surface 8 is located.

[0095] The optical parameters of each lens, aperture 6, and filter 7 are shown in Table 1.

[0096] Table 1

[0097]

[0098] The focal lengths and other optical parameters of each lens are shown in Table 2.

[0099] Table 2

[0100]

[0101]

[0102] The description of the aspheric surface in the lens is as follows:

[0103] z=(cr2 ) / {1+[1-(k+1)(c 2 r 2 )]1 / 2}+A4r 4 +A6r 6 +A8r 8 +A 10 r 10 +A 12 r 12 +A 14 r 14 +A 16 r 16 +A 18 r 18 +A 20 r 20

[0104] Wherein, k is the conic coefficient, A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the vertical distance of the point on the aspherical curve from the optical axis, and z is the aspherical depth (the vertical distance between the point on the aspherical surface with a distance of r from the optical axis and the tangent plane tangent to the vertex on the optical axis 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 above formula.

[0105] The first lens 1 and the third lens 3 are spherical lenses, and the second lens 2, the fourth lens 4 and the fifth lens 5 are aspherical lenses.

[0106] The aspherical parameters are shown in Table 3.

[0107] Table 3

[0108] Surface number k <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> <![CDATA[A 12 ]]> A 14 ]]> <![CDATA[A 16 ]]> S3 -9.42E-01 1.50E-02 -1.29E-03 -1.43E-03 2.17E-04 0.00E+00 0.00E+00 0.00E+00 S4 -6.18E-01 2.91E-02 -2.65E-03 5.97E-04 -1.29E-05 0.00E+00 0.00E+00 0.00E+00 S8 4.73E+01 -9.42E-02 -1.21E-01 -1.93E-02 5.36E-01 0.00E+00 0.00E+00 0.00E+00 S9 -2.65E+00 6.48E-01 -1.55E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S10 -7.52E+00 -7.35E-01 1.73E+00 -3.97E+00 5.75E+00 -2.62E+00 0.00E+00 0.00E+00

[0109] Figure 2-4 The OTF modulus curves of Example 1 in the Y field of view at -40℃, 25℃ and 85℃ temperature environments are shown in the figure, the S1 line represents the sagittal field curvature, and the T1 line represents the meridional field curvature. It can be seen that the OTF modulus corresponding to the Y field angle of 16.69° reaches 80% or even more, the OTF modulus corresponding to the Y field angle of 50° reaches 70% or more, and the OTF modulus corresponding to the Y field angle of 80° reaches 75% or more, indicating that the optical lens of Example 1 can clearly image in the range of -40℃ to +85℃, and can shoot high-definition pictures.

[0110] Figure 5This is the relative illumination diagram of Example 1, the ordinate is the relative illumination value, and the abscissa is the Y field of view angle, i.e., the half field of view angle. This diagram can reflect the uniformity of the illumination of the optical lens. It can be seen that the relative illumination is greater than 0.8 when the Y field of view angle is 58.42°, the relative illumination is close to 0.7 when the Y field of view angle is 75.11°, and the relative illumination is close to 0.6 when the Y field of view angle is 83.46°, reflecting that the optical lens has a high relative illumination and sufficient light input, ensuring that there will be no dark corners at the edges of the actual picture even when the lens is used in a dim environment.

[0111] Example 2

[0112] like Figure 6-10 As shown, a wide-band target detection optical lens has five lenses, including a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5 arranged in sequence from the object side to the image side along the optical axis.

[0113] The first lens 1 has a negative focal power, its object side surface is convex, and the image side surface is concave; the second lens 2 has a positive focal power, its object side surface is concave, and the image side surface is convex, which is conducive to smoother refracted light, reduced aberration, and lowered lens sensitivity; the third lens 3 has a positive focal power, its object side surface is convex, and the image side surface is convex; a stop 6 is provided between the second lens 2 and the third lens 3, which is conducive to reducing the lens aperture; the fourth lens 4 has a negative focal power, its object side surface is concave, and the image side surface is concave; the fifth lens 5 has a positive focal power, its object side surface is convex, and the image side surface is convex, which is conducive to increasing the solid angle of the imaging beam and improving the relative illumination of the imaging surface; the fourth lens 4 and the fifth lens 5 are a cemented lens, which is conducive to correcting chromatic aberration, reducing ghost reflections, reducing assembly sensitivity, and increasing the image surface size; the image side of the fifth lens 5 is provided with a filter 7 and an imaging surface 8.

[0114] Figure 6 , symbol S1 represents the object-side surface of the first lens 1, S2 represents the image-side surface of the first lens 1; S3 represents the object-side surface of the second lens 2, S4 represents the image-side surface of the second lens 2; S5 represents the surface of the aperture 6; S6 represents the object-side surface of the third lens 3, S7 represents the image-side surface of the third lens 3; S8 represents the object-side surface of the fourth lens 4, S9 represents the image-side surface of the fourth lens 4, and also represents the object-side surface of the fifth lens 5 cemented to the fourth lens 4, S10 represents the image-side surface of the fifth lens 5; S11 represents the object-side surface of the filter 7, S12 represents the image-side surface of the filter 7; S13 represents the surface where the imaging surface 8 is located.

[0115] The optical parameters of each lens, aperture 6, and filter 7 are shown in Table 4.

[0116] Table 4

[0117]

[0118]

[0119] The focal lengths and other optical parameters of each lens are shown in Table 5.

[0120] Table 5

[0121] Numerical Focal length f1 of the first lens L1 -2.18 Focal length f2 of the second lens L2 19.24 Focal length f3 of the third lens L3 2.61 The focal length of the fourth lens L4 is f4 -1.38 The focal length of the fifth lens L5 is f5 1.34 Total effective focal length f 0.91 BFL 1.57 Maximum field of view FOV 171.5 Image height H corresponding to the maximum field of view 2.5 <![CDATA[D1]]> 6.1 <![CDATA[半视场角为1°时对应的镜头像高Y1]]> 0.016 TTL 10 (FOV×f) / H 62.43 TTL / f 10.99 <![CDATA[2*D1 / f]]> 13.41 <![CDATA[Y1*180 / pi]]> 0.92 BFL / f 1.73

[0122] The description of the aspheric surface in the lens is as follows:

[0123] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )]1 / 2}+A4r 4 +A6r 6 +A8r 8 +A 10 r 10 +A 12 r 12 +A 14 r 14 +A 16 r 16 +A 18 r 18 +A 20 r 20

[0124] Among them, k is the cone coefficient, A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 is the aspheric coefficient, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and a tangent plane tangent to the vertex on the aspheric surface). For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the above formula. However, the present invention is not limited to the aspheric surface polynomial form expressed in the above formula.

[0125] The first lens 1 and the third lens 3 are spherical lenses, respectively. The second lens 2 , the fourth lens 4 and the fifth lens 5 are aspherical lenses, respectively.

[0126] The aspheric parameters are shown in Table 6.

[0127] Table 6

[0128] Surface number k <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> <![CDATA[A 12 ]]> <![CDATA[A 14 ]]> <![CDATA[A 16 ]]> S3 -6.42E-01 -1.19E-02 6.47E-03 1.48E-03 -1.81E-03 0.00E+00 0.00E+00 0.00E+00 S4 -1.14E-01 1.16E-02 7.48E-03 -2.25E-03 -8.07E-04 0.00E+00 0.00E+00 0.00E+00 S8 -7.01E+01 -5.05E-03 -7.68E-03 -6.72E-02 4.59E-02 0.00E+00 0.00E+00 0.00E+00 S9 -2.36E+00 4.77E-01 -3.76E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S10 -6.31E+01 -2.80E-01 5.68E-01 -7.67E-01 5.91E-01 -1.70E-01 0.00E+00 0.00E+00

[0129] Figure 7The OTF modulus curves of Example 2 under the Y field of view at -40°C, 25°C, and 85°C temperatures are shown. The S1 line represents the sagittal field curvature, and the T1 line represents the meridional field curvature. It can be seen that the OTF modulus corresponding to a Y field of view angle of 25.72° is greater than 80%, the OTF modulus corresponding to a Y field of view angle of 60° is greater than 75%, and the OTF modulus corresponding to a Y field of view angle of 85° is greater than 60%, indicating that the optical lens of Example 1 can clearly form images within the range of -40°C to +85°C and can capture high-definition images.

[0130] Figure 10 This is the relative illumination diagram of Example 2, where the ordinate is the relative illumination value and the abscissa is the Y field of view angle, i.e., the half field of view angle. This diagram can reflect the uniformity of the illumination of the optical lens. It can be seen that the relative illumination is greater than 0.8 when the Y field of view angle is 51°, the relative illumination is greater than 0.7 when the Y field of view angle is 60°, and the relative illumination is greater than 0.6 when the Y field of view angle is 77°, reflecting that the optical lens has a high relative illumination and sufficient light input, ensuring that there will be no dark corners at the edges of the actual picture even when the lens is used in a dim environment.

[0131] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0132] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wide-band target detection optical lens, characterized in that: comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side along the optical axis; 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 refractive power, its object side surface is concave, and its image side surface is convex; The third lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex; The fourth lens has negative optical power, and its object-side surface and image-side surface are concave; The fifth lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex; The wide-band detection target optical lens satisfies the following conditional formula: 8≤TTL / f≤20; Wherein, TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the wide-band detection target optical lens on the optical axis, and f is the total effective focal length of the wide-band detection target optical lens.

2. The wide-band target detection optical lens according to claim 1, characterized in that: The wide-band detection target optical lens satisfies the following conditional formula: 0.5≤|H / f1|≤2.1; Wherein, H is the image height corresponding to the maximum field angle of the optical lens for wide-band detection of the target, and f1 is the focal length of the first lens.

3. The wide-band target detection optical lens according to claim 1, characterized in that: The wide-band detection target optical lens satisfies the following conditional formula: 0.02≤|f / R1|≤0.2; Wherein, R1 is the curvature radius of the object side surface of the first lens.

4. The wide-band target detection optical lens according to claim 1, characterized in that: The wide-band detection target optical lens satisfies the following conditional formula: 1.3≤BFL / f≤3.2; Wherein, BFL is the distance on the optical axis from the center of the image side surface of the fifth lens to the imaging surface of the wide-band detection target optical lens.

5. The wide-band target detection optical lens according to claim 1, characterized in that: The wide-band detection target optical lens satisfies the following conditional formula: 11≤2*D1 / f≤22; Wherein, 2*D1 is the effective diameter of the first lens.

6. The wide-band target detection optical lens according to claim 1, characterized in that: The wide-band detection target optical lens satisfies the following conditional formula: 0.4≤Y1*180 / pi≤1.2; Wherein, Y1 is the lens image height corresponding to a half field of view angle of 1°, and pi is the pi.

7. The wide-band target detection optical lens according to claim 1, characterized in that: The first lens and the third lens are spherical lenses, and the second lens, the fourth lens and the fifth lens are aspherical lenses.

8. The wide-band target detection optical lens according to claim 1, characterized in that: The fifth lens has a refractive index temperature coefficient not greater than -5.9*10 -6 / ℃ plastic material.

9. A camera device, characterized in that: The invention comprises the wide-band target detection optical lens described in any one of claims 1 to 8.

10. A driving tool, characterized in that: Including a camera device as described in claim 9, the driving tool is a vehicle, a ship, an airplane or a drone.

Images