A high-definition vehicle-mounted lens

Abstract

The present invention provides a high-definition vehicle-mounted lens, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a parallel flat plate and an image plane IMA are sequentially arranged along the incident direction of an optical axis; the first lens has a negative optical focal length, and its object side surface is a convex surface, and the image side surface is a concave surface; the second lens has a positive optical focal length, and its object side surface is a convex surface, and the image side surface is a convex surface or a concave surface; the third lens has a positive optical focal length, and its object side surface is a concave surface, and the image side surface is a convex surface; the fourth lens has a positive optical focal length, and its object side surface is a convex surface, and the image side surface is a convex surface or a concave surface; the fifth lens has a negative optical focal length, and its object side surface is a concave surface or a convex surface, and the image side surface is a concave surface or a convex surface; in this way, long-distance details can be clearly distinguished, and the high-definition vehicle-mounted lens has high resolution, small distortion, low cost, and can achieve clear imaging in a temperature range of ‑40° to 105°.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted lenses, and in particular to a high-definition vehicle-mounted lens. Background Art

[0002] In recent years, with the development of vehicle-mounted technology, the technical requirements for vehicle-mounted cameras for front view, side view, rear view, camera devices, automatic cruise control and driving recorders are getting higher and higher. Among them, side view and rear view vehicle-mounted lenses are important components of advanced driver assistance systems. Rear view and side view lenses can replace traditional car rearview mirrors and side view mirrors. Drivers can find obstacles on the side and back of the car through the display screen of the side view or rear view vehicle-mounted lens imaging to avoid driving accidents.

[0003] However, the images taken by traditional forward-looking cameras have low resolution, small depth of field, and cannot clearly distinguish details at a distance. The driving assistance system cannot accurately judge the information of vehicles at the side and rear in real time and make timely warnings or avoidance. In addition, the clarity of most on-board lenses will seriously decrease in high and low temperature environments, the temperature drift is large, the brightness around the imaging screen is not large enough, and the relative illumination is low, which will pose driving risks. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a high-definition vehicle-mounted lens that can clearly distinguish long-distance details. The high-definition vehicle-mounted lens has high resolution, small distortion, low cost, and can achieve clear imaging within a temperature range of -40° to 105°.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] The present invention provides a high-definition vehicle-mounted lens, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a parallel flat plate and an image plane IMA are sequentially arranged along the incident direction of 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 convex, and its image side surface is convex or concave;

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

[0010] The fourth lens has positive refractive power, its object side surface is convex, and its image side surface is convex or concave;

[0011] The fifth lens has negative optical power, and its object side surface is concave or convex, and its image side surface is concave or convex;

[0012] At the same time, the high-definition vehicle-mounted lens satisfies the following conditions: -2.2≤f1 / f≤-1.2, 1.1≤f3 / f≤13.5, -1.8≤f5 / f≤1.29, wherein f1 is the focal length value of the first lens, f3 is the focal length value of the third lens, f5 is the focal length value of the fifth lens, and f is the focal length value of the high-definition vehicle-mounted lens.

[0013] The present invention provides a high-definition vehicle-mounted lens, which can clearly distinguish long-distance details, and the high-definition vehicle-mounted lens has high resolution, small distortion, low cost, and can achieve clear imaging within a temperature range of -40° to 105°.

[0014] As a preferred technical solution, it includes: a sixth lens is further provided between the fifth lens and the parallel flat plate along the incident direction of the optical axis, the sixth lens has positive focal power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is convex or concave.

[0015] As a preferred technical solution, the fourth lens and the fifth lens are connected to form a cemented lens.

[0016] As a preferred technical solution, a separator lens is provided between the fourth lens and the fifth lens.

[0017] As a preferred technical solution, a stop is provided between the second lens and the third lens.

[0018] As a preferred technical solution, the first lens satisfies the following conditions: Nd1>1.40, Vd1>36, wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens;

[0019] The second lens satisfies the following conditions: Nd2>1.9, Vd2<35, wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens;

[0020] The third lens satisfies the following conditions: Nd3>1.50, Vd3>35, wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens;

[0021] The fourth lens satisfies the following conditions: Nd4>1.65, Vd4>16, wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens;

[0022] The fifth lens satisfies the following conditions: Nd5>1.3, Vd5<25, wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens.

[0023] As a preferred technical solution, the high-definition vehicle-mounted lens satisfies the following conditions: BFL / TTL>0.23, wherein BFL is the distance from the center of the image side of the last lens along the incident direction of the optical axis to the imaging surface of the high-definition vehicle-mounted lens on the optical axis; TTL is the distance from the center of the object side of the first lens to the imaging surface of the high-definition vehicle-mounted lens on the optical axis.

[0024] As a preferred technical solution, the high-definition vehicle-mounted lens meets the following conditions:

[0025] 0.79≤FOV / h / D≤0.85;

[0026] Wherein, FOV is the maximum field of view of the high-definition vehicle-mounted lens;

[0027] D is the maximum aperture of the first lens on the object side corresponding to the maximum field of view of the high-definition vehicle lens; and

[0028] h is the image height corresponding to the maximum field of view of the high-definition vehicle-mounted lens.

[0029] As an optimal technical solution, the maximum field of view angle FOV of the high-definition vehicle-mounted lens, the entire focal length value f of the high-definition vehicle-mounted lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle-mounted lens satisfy: 29.5≤(FOV×f) / h≤30.5.

[0030] As a preferred technical solution, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all glass spherical lens pieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A structural diagram of a high-definition vehicle-mounted lens provided in Example 1 of the present invention;

[0032] Figure 2 This is a field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 1 of the present invention;

[0033] Figure 3 A structural diagram of a high-definition vehicle-mounted lens provided in Example 2 of the present invention;

[0034] Figure 4 This is a field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 2 of the present invention;

[0035] Figure 5 A structural diagram of a high-definition vehicle-mounted lens provided in Example 3 of the present invention;

[0036] Figure 6 This is a field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 3 of the present invention;

[0037] Figure 7 A structural diagram of a high-definition vehicle-mounted lens provided in Example 4 of the present invention;

[0038] Figure 8 This is a field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 4 of the present invention;

[0039] Fig. 9 A structural diagram of a high-definition vehicle-mounted lens provided in Example 5 of the present invention;

[0040] Fig.10 This is a field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 5 of the present invention;

[0041] Among them: 1-first lens; 2-second lens; 3-third lens; 4-fourth lens; 5-fifth lens; 6-sixth lens; 7-parallel plate; 8-image plane IMA; 9-aperture. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] It can be understood that the present invention achieves the purpose of the present invention through some embodiments.

[0044] Example 1

[0045] like Figure 1 As shown, the present invention provides a high-definition vehicle-mounted lens, which is provided with a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a parallel plate 7 and an image plane IMA 8 in sequence along the incident direction of the optical axis.

[0046] The first lens 1 has negative optical power, its object side surface is convex, and its image side surface is concave;

[0047] The second lens 2 has positive refractive power, its object side surface is convex, and its image side surface is concave;

[0048] The third lens 3 has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0049] The fourth lens 4 has positive refractive power, and its object side surface is convex, and its image side surface is convex;

[0050] The fifth lens 5 has negative optical power, and its object side surface is concave, and its image side surface is concave;

[0051] The sixth lens 6 has positive refractive power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave;

[0052] A stop 9 is provided between the second lens 2 and the third lens 3;

[0053] The fourth lens 4 and the fifth lens 6 are connected to form a cemented lens;

[0054] At the same time, the high-definition vehicle-mounted lens satisfies the following conditions: -2.2≤f1 / f≤-1.2, 1.1≤f3 / f≤13.5, -1.8≤f5 / f≤1.29, wherein f1 is the focal length value of the first lens, f3 is the focal length value of the third lens, f5 is the focal length value of the fifth lens, and f is the focal length value of the high-definition vehicle-mounted lens. By reasonably matching the focal length values ​​of the lenses, it is beneficial to reduce the assembly sensitivity and control the low-temperature or high-temperature back focus drift of the lens within a very small range, thereby achieving clear imaging.

[0055] The first lens 1 has a negative optical focal length, and its object side is convex and its image side is concave. The first lens 1 is meniscus-shaped, which is conducive to collecting light, reducing distortion, and improving imaging quality; the aperture is set between the second lens 2 and the third lens 3, which is conducive to reducing the lens aperture; the second lens 2 is a meniscus positive lens and bends toward the aperture, which is conducive to receiving the refracted light more smoothly, reducing aberrations, reducing lens sensitivity, and also helping to reduce the lens aperture. The third lens 3 and the fourth lens 4 are positive lenses, which are conducive to refracting light and reducing the lens length; the fourth lens 4 and the fifth lens 5 form a cemented lens to reduce or eliminate chromatic aberration and improve imaging quality. The cemented lens improves the lens transmittance and reduces the difficulty of assembly. The fifth lens 5 is a negative lens, which is conducive to correcting field curvature and improving imaging quality. The optical parameters of the high-definition vehicle-mounted lens provided in Example 1 are as shown in Table 1 below:

[0056] Table 1 shows the optical parameters of the high-definition vehicle-mounted lens provided in this embodiment 1.

[0057]

[0058] From Table 1, we can observe that the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are all spherical lenses; the first lens 1 satisfies Nd1=1.61, Vd1=37, wherein Nd1 is the light refractive index of the first lens 1, and Vd1 is the Abbe constant of the first lens; the second lens 2 satisfies the following conditions: Nd2=1.95, Vd2=17.9, wherein Nd2 is the light refractive index of the second lens 2, and Vd2 is the Abbe constant of the second lens; the third lens 3 satisfies the following conditions: Nd3=1.59, Vd3=68.3, wherein In the figure, Nd3 is the refractive index of the third lens, and Vd3 is the Abbe constant of the third lens; the fourth lens 4 satisfies the following conditions: Nd4=2, Vd4=28.3, wherein Nd4 is the refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens; the fifth lens 5 satisfies the following conditions: Nd5=1.92, Vd5=18.9, wherein Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens; the sixth lens 6 satisfies the following conditions: Nd6=2, Vd6=28.3, wherein Nd6 is the refractive index of the sixth lens, and Vd6 is the Abbe constant of the sixth lens. The parallel plate 7 satisfies the following conditions: Nd7=1.52, Vd7=64.2, wherein Nd7 is the refractive index of the parallel plate, and Vd7 is the Abbe constant of the parallel plate. The measurement parameters of the high-definition vehicle-mounted lens provided in this embodiment are shown in the following Table 1.1:

[0059] Table 1.1 Measurement parameters of high-definition vehicle-mounted lens provided in this embodiment

[0060]

[0061] Substitute the high-definition vehicle-mounted lens measurement parameters provided in this embodiment of Table 1.1 into the formula BFL / TTL=0.2397, wherein BFL is the distance from the center of the image side surface of the sixth lens 6 along the incident direction of the optical axis to the imaging surface of the high-definition vehicle-mounted lens on the optical axis; TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the high-definition vehicle-mounted lens on the optical axis; the high-definition vehicle-mounted lens in this embodiment satisfies BFL / TTL>0.23, which is beneficial to increase the optical back focus of the lens and leave sufficient space for the module.

[0062] Substitute the high-definition vehicle-mounted lens measurement parameters provided in this embodiment of Table 1.1 into the formula FOV / h / D=0.7914;

[0063] Wherein, FOV is the maximum field of view of the high-definition vehicle-mounted lens;

[0064] D is the maximum aperture of the first lens on the object side corresponding to the maximum field of view of the high-definition vehicle lens; and

[0065] h is the image height corresponding to the maximum field of view of the high-definition vehicle-mounted lens; the high-definition vehicle-mounted lens in this embodiment satisfies 0.79≤FOV / h / D≤0.85, which is conducive to achieving a small aperture for the front-end lens.

[0066] Substitute the measurement parameters of the high-definition vehicle lens provided in this embodiment in Table 1.1 into the formula (FOV×f) / h=30.054. The maximum field of view angle FOV of the high-definition vehicle lens provided in this embodiment, the whole group focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens satisfy: 29.5≤(FOV×f) / h≤30.5; controlling the maximum field of view angle FOV of the high-definition vehicle lens, the whole group focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens to satisfy: 29.5≤(FOV×f) / h≤30.5 is beneficial to reducing lens distortion.

[0067] like Figure 2 As shown, the field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 1 of the present invention, wherein the left figure is a field curvature curve diagram, the ordinate of the field curvature diagram is the field angle, the abscissa is the distance of the image point from the paraxial image plane, T represents the meridian field curvature, S represents the sagittal field curvature, and the field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane as a function of the field coordinates, which is divided into meridian field curvature and sagittal field curvature. The right figure is a distortion curve diagram, the ordinate of the distortion diagram is the field angle, and the abscissa is the distortion percentage. Distortion belongs to the main ray aberration, which reflects the similarity of the object and the image. The optical lens in this specific embodiment has a small optical distortion and a clear image.

[0068] Example 2

[0069] like Figure 3 As shown, the present invention provides a high-definition vehicle-mounted lens, which is provided with a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a parallel plate 7 and an image plane IMA 8 in sequence along the incident direction of the optical axis.

[0070] The first lens 1 has negative optical power, its object side surface is convex, and its image side surface is concave;

[0071] The second lens 2 has positive refractive power, and its object side surface is convex, and its image side surface is convex;

[0072] The third lens 3 has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0073] The fourth lens 4 has positive refractive power, its object side surface is convex, and its image side surface is concave;

[0074] The fifth lens 5 has negative optical power, and its object side surface is convex, and its image side surface is convex;

[0075] The sixth lens 6 has positive refractive power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave;

[0076] The fourth lens 4 and the fifth lens 5 are connected to form a cemented lens;

[0077] At the same time, the high-definition vehicle-mounted lens satisfies the following conditions: -2.2≤f1 / f≤-1.2, 1.1≤f3 / f≤13.5, -1.8≤f5 / f≤1.29, wherein f1 is the focal length value of the first lens, f3 is the focal length value of the third lens, f5 is the focal length value of the fifth lens, and f is the focal length value of the high-definition vehicle-mounted lens. By reasonably matching the focal length values ​​of the lenses, it is beneficial to reduce the assembly sensitivity and control the low-temperature or high-temperature back focus drift of the lens within a very small range, thereby achieving clear imaging.

[0078] The first lens 1 has a negative focal power, and its object side is convex, and its image side is concave. The first lens 1 is meniscus-shaped, which is conducive to collecting light, reducing distortion, and improving imaging quality; the second lens 2 has a positive focal power, and its object side is convex, and its image side is convex. The second lens 2 is a meniscus-shaped positive lens, which is conducive to receiving and refracting light more smoothly, reducing aberrations, reducing lens sensitivity, and also helping to reduce the lens aperture; the third lens 3 has a positive focal power, and its object side is concave, and its image side is convex; the fourth lens 4 has a positive focal power, and its object side is convex, and its image side is concave; the third lens 3 and the fourth lens 4 are positive lenses, which are conducive to refracting light and reducing the length of the lens; the fourth lens 4 is connected with the fifth lens 5 to form a cemented lens, which reduces or eliminates chromatic aberration and improves imaging quality. The cemented lens improves the lens transmittance and reduces the difficulty of assembly. The fifth lens 5 is a negative lens, which is conducive to correcting field curvature and improving imaging quality; the optical parameters of the high-definition vehicle-mounted lens provided in Example 2 are as shown in Table 2:

[0079] Table 2 shows the optical parameters of the high-definition vehicle-mounted lens provided in Example 2.

[0080]

[0081]

[0082] From Table 2, we can observe that the first lens 1 satisfies the following conditions: Nd1=1.49, Vd1=70.4, wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens; the second lens 2 satisfies the following conditions: Nd2=2, Vd2=25.4, wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens; the third lens 3 satisfies the following conditions: Nd3=1.59, Vd3=68.3, wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens Abbe constant; the fourth lens 4 satisfies the following conditions: Nd4=1.95, Vd4=17.9, wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens; the fifth lens 5 satisfies the following conditions: Nd5=1.59, Vd5=18.3, wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens; the sixth lens 6 satisfies the following conditions: Nd6=2, Vd6=28.3, wherein Nd6 is the light refractive index of the sixth lens, and Vd6 is the Abbe constant of the sixth lens. The parallel plate 7 satisfies the following conditions: Nd7=1.52, Vd7=64.2, wherein Nd7 is the light refractive index of the parallel plate, and Vd7 is the Abbe constant of the parallel plate. The measurement parameters of the high-definition vehicle-mounted lens provided in this embodiment are shown in the following Table 2.1:

[0083] Table 2.1 Measurement parameters of high-definition vehicle-mounted lens provided in this embodiment

[0084]

[0085] Substitute the high-definition vehicle-mounted lens measurement parameters provided in this embodiment of Table 2.1 into the formula BFL / TTL=0.2580, wherein BFL is the distance from the center of the image side surface of the sixth lens 6 along the incident direction of the optical axis to the imaging surface of the high-definition vehicle-mounted lens on the optical axis; TTL is the distance from the center of the object side surface of the first lens 1 to the imaging surface of the high-definition vehicle-mounted lens on the optical axis; the high-definition vehicle-mounted lens in this embodiment satisfies BFL / TTL>0.23, which is conducive to increasing the optical back focus of the lens and leaving sufficient space for the module.

[0086] Substitute the high-definition vehicle-mounted lens measurement parameters provided in this embodiment of Table 2.1 into the formula FOV / h / D=0.7933;

[0087] Wherein, FOV is the maximum field of view of the high-definition vehicle-mounted lens;

[0088] D is the maximum aperture of the object side of the first lens 1 corresponding to the maximum field of view of the high-definition vehicle lens; and

[0089] h is the image height corresponding to the maximum field of view of the high-definition vehicle-mounted lens; the high-definition vehicle-mounted lens in this embodiment satisfies 0.79≤FOV / h / D≤0.85, which is conducive to achieving a small aperture for the front-end lens.

[0090] Substitute the measurement parameters of the high-definition vehicle lens provided in this embodiment in Table 2.1 into the formula (FOV×f) / h=30.120. The maximum field of view angle FOV of the high-definition vehicle lens provided in this embodiment, the whole set focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens satisfy: 29.5≤(FOV×f) / h≤30.5; controlling the maximum field of view angle FOV of the high-definition vehicle lens, the whole set focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens to satisfy: 29.5≤(FOV×f) / h≤30.5 is beneficial to reducing lens distortion.

[0091] like Figure 4 As shown, the field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 2 of the present invention, wherein the left figure is a field curvature curve diagram, the ordinate of the field curvature diagram is the field angle, the abscissa is the distance of the image point from the paraxial image plane, T represents the meridian field curvature, S represents the sagittal field curvature, and the field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane as a function of the field coordinates, which is divided into meridian field curvature and sagittal field curvature. The right figure is a distortion curve diagram, the ordinate of the distortion diagram is the field angle, and the abscissa is the distortion percentage. Distortion belongs to the main ray aberration, which reflects the similarity of the object and the image. The optical lens in this specific embodiment has small optical distortion and clear image.

[0092] Example 3

[0093] like Figure 5 As shown, the present invention provides a high-definition vehicle-mounted lens, comprising: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a parallel plate 7 and an image plane IMA 8 are sequentially arranged along the incident direction of the optical axis;

[0094] The first lens 1 has negative optical power, its object side surface is convex, and its image side surface is concave;

[0095] The second lens 2 has positive refractive power, its object side surface is convex, and its image side surface is concave;

[0096] The third lens 3 has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0097] The fourth lens 4 has positive refractive power, and its object side surface is convex, and its image side surface is convex;

[0098] The fifth lens 5 has negative optical power, its object side surface is concave, and its image side surface is convex;

[0099] A stop 9 is provided between the second lens 2 and the third lens 3;

[0100] The fourth lens 4 and the fifth lens 5 are connected to form a cemented lens;

[0101] At the same time, the high-definition vehicle-mounted lens satisfies the following conditions: -2.2≤f1 / f≤-1.2, 1.1≤f3 / f≤13.5, -1.8≤f5 / f≤1.29, wherein f1 is the focal length value of the first lens, f3 is the focal length value of the third lens, f5 is the focal length value of the fifth lens, and f is the focal length value of the high-definition vehicle-mounted lens. By reasonably matching the focal length values ​​of the lenses, it is beneficial to reduce the assembly sensitivity and control the low-temperature or high-temperature back focus drift of the lens within a very small range, thereby achieving clear imaging.

[0102] The first lens 1 has a negative optical focal length, and its object side is convex, and its image side is concave. The first lens 1 is meniscus-shaped, which is conducive to collecting light, reducing distortion, and improving imaging quality; the aperture 9 is arranged between the second lens 2 and the third lens 3, which is conducive to reducing the lens aperture; the second lens 2 is a meniscus-shaped positive lens and bends toward the aperture 9, which is conducive to receiving the refracted light more smoothly, reducing aberrations, reducing lens sensitivity, and also helping to reduce the lens aperture; the third lens 3 and the fourth lens 4 are positive lenses, which are conducive to refracting light and reducing the lens length; the fourth lens 4 and the fifth lens 5 form a cemented lens, which reduces or eliminates chromatic aberration and improves imaging quality. The cemented lens improves the lens transmittance and reduces the difficulty of assembly. The fifth lens is a negative lens, which is conducive to correcting field curvature and improving imaging quality; the optical parameters of the high-definition vehicle-mounted lens provided in Example 3 are as shown in Table 3 below:

[0103] Table 3 shows the optical parameters of the high-definition vehicle-mounted lens provided in this embodiment 3.

[0104]

[0105] From Table 3, we can observe that the first lens 1 satisfies the following conditions: Nd1=1.73, Vd1=54.7, wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens; the second lens 2 satisfies the following conditions: Nd2=1.64, Vd2=30.2, wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens; the third lens 3 satisfies the following conditions: Nd3=1.59, Vd3=68.5, wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens. Abbe constant of the lens; the fourth lens 4 satisfies the following conditions: Nd4=1.66, Vd4=50.9, wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens; the fifth lens 5 satisfies the following conditions: Nd5=1.85, Vd5=23.8, wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens; the parallel plate satisfies the following conditions: Nd7=1.52, Vd7=64.2, wherein Nd7 is the light refractive index of the parallel plate, and Vd7 is the Abbe constant of the parallel plate. The measurement parameters of the high-definition vehicle-mounted lens provided in this embodiment are shown in Table 3.1 below:

[0106] Table 3.1 Measurement parameters of high-definition vehicle-mounted lens provided in this embodiment

[0107]

[0108]

[0109] Substitute the measurement parameters of the high-definition vehicle lens provided in this embodiment in Table 3.1 into the formula BFL / TTL=0.2534, wherein BFL is the distance from the center of the image side surface of the fifth lens 5 along the incident direction of the optical axis to the imaging surface of the high-definition vehicle lens on the optical axis; TTL is the distance from the center of the object side surface of the first lens 1 to the imaging surface of the high-definition vehicle lens on the optical axis; the high-definition vehicle lens in this embodiment satisfies BFL / TTL>0.23, which is beneficial to increase the optical back focus of the lens and leave sufficient space for the module.

[0110] Substitute the high-definition vehicle-mounted lens measurement parameters provided in this embodiment of Table 3.1 into the formula FOV / h / D=0.8321;

[0111] Wherein, FOV is the maximum field of view of the high-definition vehicle-mounted lens;

[0112] D is the maximum aperture of the first lens on the object side corresponding to the maximum field of view of the high-definition vehicle lens; and

[0113] h is the image height corresponding to the maximum field of view of the high-definition vehicle-mounted lens; the high-definition vehicle-mounted lens in this embodiment satisfies 0.79≤FOV / h / D≤0.85, which is conducive to achieving a small aperture for the front-end lens.

[0114] Substitute the measurement parameters of the high-definition vehicle lens provided in this embodiment in Table 3.1 into the formula (FOV×f) / h=30.421. The maximum field of view angle FOV of the high-definition vehicle lens provided in this embodiment, the whole set focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens satisfy: 29.5≤(FOV×f) / h≤30.5; controlling the maximum field of view angle FOV of the high-definition vehicle lens, the whole set focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens to satisfy: 29.5≤(FOV×f) / h≤30.5 is beneficial to reducing lens distortion.

[0115] like Figure 6 As shown, the field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 3 of the present invention, wherein the left figure is a field curvature curve diagram, the ordinate of the field curvature diagram is the field angle, the abscissa is the distance of the image point from the paraxial image plane, T represents the meridian field curvature, S represents the sagittal field curvature, and the field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane as a function of the field coordinates, which is divided into meridian field curvature and sagittal field curvature. The right figure is a distortion curve diagram, the ordinate of the distortion diagram is the field angle, and the abscissa is the distortion percentage. Distortion belongs to the main ray aberration, which reflects the similarity of the object and the image. The optical lens in this specific embodiment has small optical distortion and clear image.

[0116] Example 4

[0117] like Figure 7 As shown, the present invention provides a high-definition vehicle-mounted lens, comprising: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a parallel plate 7 and an image plane IMA 8 are sequentially arranged along the incident direction of the optical axis;

[0118] The first lens 1 has negative optical power, its object side surface is convex, and its image side surface is concave;

[0119] The second lens 2 has positive refractive power, its object side surface is convex, and its image side surface is concave;

[0120] The third lens 3 has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0121] The fourth lens 4 has positive refractive power, and its object side surface is convex, and its image side surface is convex;

[0122] The fifth lens 5 has negative optical power, its object side surface is concave, and its image side surface is convex;

[0123] A stop 9 is provided between the second lens 2 and the third lens 3;

[0124] The fourth lens 4 and the fifth lens 5 are connected to form a cemented lens;

[0125] At the same time, the high-definition vehicle-mounted lens satisfies the following conditions: -2.2≤f1 / f≤-1.2, 1.1≤f3 / f≤13.5, -1.8≤f5 / f≤1.29, wherein f1 is the focal length value of the first lens, f3 is the focal length value of the third lens, f5 is the focal length value of the fifth lens, and f is the focal length value of the high-definition vehicle-mounted lens. By reasonably matching the focal length values ​​of the lenses, it is beneficial to reduce the assembly sensitivity and control the low-temperature or high-temperature back focus drift of the lens within a very small range, thereby achieving clear imaging.

[0126] The first lens 1 has a negative optical focal length, and its object side is convex, and its image side is concave. The first lens 1 is meniscus-shaped, which is conducive to collecting light, reducing distortion, and improving imaging quality; the aperture 9 is arranged between the second lens 2 and the third lens 3, which is conducive to reducing the lens aperture; the second lens 2 is a meniscus-shaped positive lens and bends toward the aperture 9, which is conducive to receiving the refracted light more smoothly, reducing aberrations, reducing lens sensitivity, and also helping to reduce the lens aperture; the third lens 3 and the fourth lens 4 are positive lenses, which are conducive to refracting light and reducing the length of the lens; the fourth lens 4 and the fifth lens 5 form a cemented lens, which reduces or eliminates chromatic aberration and improves imaging quality. The cemented lens improves the lens transmittance and reduces the difficulty of assembly. The fifth lens 5 is a negative lens, which is conducive to correcting field curvature and improving imaging quality; the optical parameters of the high-definition vehicle-mounted lens provided in Example 4 are as shown in Table 4 below:

[0127] Table 4 shows the optical parameters of the high-definition vehicle-mounted lens provided in this embodiment 4.

[0128]

[0129] From Table 4, we can observe that the first lens 1 satisfies the following conditions: Nd1=1.76, Vd1=52.3, wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens; the second lens 2 satisfies the following conditions: Nd2=1.92, Vd2=18.9, wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens; the third lens 3 satisfies the following conditions: Nd3=1.82, Vd3=46.6, wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens. The fourth lens 4 satisfies the following conditions: Nd4=1.69, Vd4=68.3, wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens; the fifth lens 5 satisfies the following conditions: Nd5=1.81, Vd5=22.7, wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens; the parallel plate 7 satisfies the following conditions: Nd7=1.52, Vd7=64.2, wherein Nd7 is the light refractive index of the parallel plate, and Vd7 is the Abbe constant of the parallel plate. The measurement parameters of the high-definition vehicle-mounted lens provided in this embodiment are shown in Table 4.1 below:

[0130] Table 4.1 Measurement parameters of high-definition vehicle-mounted lens provided in this embodiment

[0131]

[0132] Substitute the high-definition vehicle lens measurement parameters provided in this embodiment of Table 4.1 into the formula BFL / TTL=0.2668, wherein BFL is the distance from the center of the image side surface of the fifth lens 5 along the incident direction of the optical axis to the imaging surface of the high-definition vehicle lens on the optical axis; TTL is the distance from the center of the object side surface of the first lens 1 to the imaging surface of the high-definition vehicle lens on the optical axis; the high-definition vehicle lens in this embodiment satisfies BFL / TTL>0.23, which is beneficial to increase the optical back focus of the lens and leave sufficient space for the module.

[0133] Substitute the high-definition vehicle-mounted lens measurement parameters provided in this embodiment in Table 4.1 into the formula FOV / h / D=0.7980;

[0134] Wherein, FOV is the maximum field of view of the high-definition vehicle-mounted lens;

[0135] D is the maximum aperture of the first lens on the object side corresponding to the maximum field of view of the high-definition vehicle lens; and

[0136] h is the image height corresponding to the maximum field of view of the high-definition vehicle-mounted lens; the high-definition vehicle-mounted lens in this embodiment satisfies 0.79≤FOV / h / D≤0.85, which is conducive to achieving a small aperture for the front-end lens.

[0137] Substitute the measurement parameters of the high-definition vehicle lens provided in this embodiment in Table 4.1 into the formula (FOV×f) / h=29.687. The maximum field of view angle FOV of the high-definition vehicle lens provided in this embodiment, the whole set focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens satisfy: 29.5≤(FOV×f) / h≤30.5; controlling the maximum field of view angle FOV of the high-definition vehicle lens, the whole set focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens to satisfy: 29.5≤(FOV×f) / h≤30.5 is beneficial to reducing lens distortion.

[0138] like Figure 8 As shown, the field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 4 of the present invention, wherein the left figure is a field curvature curve diagram, the ordinate of the field curvature diagram is the field angle, the abscissa is the distance of the image point from the paraxial image plane, T represents the meridian field curvature, S represents the sagittal field curvature, and the field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane as a function of the field coordinates, which is divided into meridian field curvature and sagittal field curvature. The right figure is a distortion curve diagram, the ordinate of the distortion diagram is the field angle, and the abscissa is the distortion percentage. Distortion belongs to the main ray aberration, which reflects the similarity of the object and the image. The optical lens in this specific embodiment has a small optical distortion and a clear image.

[0139] Example 5

[0140] like Fig. 9 As shown, the present invention provides a high-definition vehicle-mounted lens, comprising: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a parallel plate 7 and an image plane IMA 8 are sequentially arranged along the incident direction of the optical axis;

[0141] The first lens 1 has negative optical power, its object side surface is convex, and its image side surface is concave;

[0142] The second lens 2 has positive refractive power, its object side surface is convex, and its image side surface is concave;

[0143] The third lens 3 has positive refractive power, its object side surface is concave, and its image side surface is convex;

[0144] The fourth lens 4 has positive refractive power, and its object side surface is convex, and its image side surface is convex;

[0145] The fifth lens 5 has negative optical power, its object side surface is concave, and its image side surface is convex;

[0146] A stop 9 is provided between the second lens 2 and the third lens 3;

[0147] The fourth lens 4 and the fifth lens 5 are connected to form a cemented lens;

[0148] At the same time, the high-definition vehicle-mounted lens satisfies the following conditions: -2.2≤f1 / f≤-1.2, 1.1≤f3 / f≤13.5, -1.8≤f5 / f≤1.29, wherein f1 is the focal length value of the first lens, f3 is the focal length value of the third lens, f5 is the focal length value of the fifth lens, and f is the focal length value of the high-definition vehicle-mounted lens; by reasonably matching the focal length values ​​of the lenses, it is helpful to reduce the assembly sensitivity and control the low-temperature or high-temperature back focus drift of the lens within a very small range, thereby ensuring clear imaging.

[0149] The first lens 1 has a negative optical focal length, and its object side is convex, and its image side is concave. The first lens 1 is meniscus-shaped, which is conducive to collecting light, reducing distortion, and improving imaging quality; the aperture is set between the second lens 2 and the third lens 3, which is conducive to reducing the lens aperture; the second lens is a meniscus positive lens and is bent toward the aperture 9, which can also be a double convex positive lens, which is conducive to receiving the refracted light more smoothly, reducing aberrations, reducing lens sensitivity, and also helping to reduce the lens aperture; the third lens 3 and the fourth lens 4 are positive lenses, which are conducive to refracting light and reducing the length of the lens; the fourth lens 4 and the fifth lens 5 form a cemented lens, which reduces or eliminates chromatic aberration and improves imaging quality. The cemented lens improves the lens transmittance and reduces the difficulty of assembly. The fifth lens 5 is a negative lens, which is conducive to correcting field curvature and improving imaging quality; the optical parameters of the high-definition vehicle-mounted lens provided in Example 5 are shown in Table 5 below:

[0150] Table 5 shows the optical parameters of the high-definition vehicle-mounted lens provided in this embodiment 5.

[0151]

[0152] It can be observed from Table 5 that the first lens 1 satisfies the following conditions: Nd1=1.67, Vd1=47.2, wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens; the second lens 2 satisfies the following conditions: Nd2=1.95, Vd2=32.3, wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens; the third lens 3 satisfies the following conditions: Nd3=1.88, Vd3=39.2, wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens. The Abbe constant of the three lenses; the fourth lens 4 satisfies the following conditions: Nd4=1.69, Vd4=54.6, wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens; the fifth lens 5 satisfies the following conditions: Nd5=1.92, Vd5=20.9, wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens; the flat plate satisfies the following conditions: Nd7=1.52, Vd7=64.2, wherein Nd7 is the light refractive index of the flat plate, and Vd7 is the Abbe constant of the flat plate. The measurement parameters of the high-definition vehicle-mounted lens provided in this embodiment are shown in Table 5.1 below:

[0153] Table 5.1 Measurement parameters of high-definition vehicle-mounted lens provided in this embodiment

[0154]

[0155] Substitute the high-definition vehicle lens measurement parameters provided in this embodiment of Table 5.1 into the formula BFL / TTL=0.3240, wherein BFL is the distance from the center of the image side surface of the fifth lens 5 along the incident direction of the optical axis to the imaging surface of the high-definition vehicle lens on the optical axis; TTL is the distance from the center of the object side surface of the first lens 1 to the imaging surface of the high-definition vehicle lens on the optical axis; the high-definition vehicle lens in this embodiment satisfies BFL / TTL>0.23, which is beneficial to increase the optical back focus of the lens and leave sufficient space for the module.

[0156] Substitute the high-definition vehicle-mounted lens measurement parameters provided in this embodiment of Table 5.1 into the formula FOV / h / D=0.8069;

[0157] Wherein, FOV is the maximum field of view of the high-definition vehicle-mounted lens;

[0158] D is the maximum aperture of the object side of the first lens 1 corresponding to the maximum field of view of the high-definition vehicle lens; and

[0159] h is the image height corresponding to the maximum field of view of the high-definition vehicle-mounted lens; the high-definition vehicle-mounted lens in this embodiment satisfies 0.79≤FOV / h / D≤0.85, which is conducive to achieving a small aperture for the front-end lens.

[0160] Substitute the measurement parameters of the high-definition vehicle lens provided in this embodiment in Table 5.1 into the formula (FOV×f) / h=29.814. The maximum field of view angle FOV of the high-definition vehicle lens provided in this embodiment, the whole set focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens satisfy: 29.5≤(FOV×f) / h≤30.5; controlling the maximum field of view angle FOV of the high-definition vehicle lens, the whole set focal length value f of the high-definition vehicle lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle lens to satisfy: 29.5≤(FOV×f) / h≤30.5 is beneficial to reducing lens distortion.

[0161] like Fig.10 As shown, the field curvature distortion diagram of the high-definition vehicle-mounted lens provided in Example 5 of the present invention, wherein the left figure is a field curvature curve diagram, the ordinate of the field curvature diagram is the field angle, the abscissa is the distance of the image point from the paraxial image plane, T represents the meridian field curvature, S represents the sagittal field curvature, and the field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane as a function of the field coordinates, which is divided into meridian field curvature and sagittal field curvature. The right figure is a distortion curve diagram, the ordinate of the distortion diagram is the field angle, and the abscissa is the distortion percentage. Distortion belongs to the main ray aberration, which reflects the similarity of the object and the image. The optical lens in this specific embodiment has a small optical distortion and a clear image.

[0162] The present invention provides a high-definition vehicle-mounted lens using 5 glass spherical lenses or 6 glass spherical lens pieces, which has good processability, high resolution, small distortion, low cost, and can achieve clear imaging within the range of -40° to 105°.

[0163] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all various changes or equivalent substitutions falling within the scope of the claims of the present application are included. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope protected by the present invention.

Claims

1. A high-definition vehicle-mounted lens, characterized in that: include: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, a parallel flat plate and an image plane IMA are sequentially arranged along the incident direction of 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 convex, and its image side surface is convex or concave; The third lens has positive refractive power, its object side surface is concave, and its image side surface is convex; The fourth lens has positive refractive power, its object side surface is convex, and its image side surface is convex or concave; The fifth lens has negative optical power, and its object side surface is concave or convex, and its image side surface is concave or convex; At the same time, the high-definition vehicle lens satisfies the following conditional formula: -2.2≤f1 / f≤-1.2, 1.1≤f3 / f≤13.5, -1.8≤f5 / f≤1.29, wherein f1 is the focal length of the first lens, f3 is the focal length of the third lens, f5 is the focal length of the fifth lens, and f is the focal length of the high-definition vehicle lens; The first lens satisfies the following conditions: Nd1>1.40, Vd1>36, wherein Nd1 is the light refractive index of the first lens, and Vd1 is the Abbe constant of the first lens; The second lens satisfies the following conditions: Nd2>1.9, Vd2<35, wherein Nd2 is the light refractive index of the second lens, and Vd2 is the Abbe constant of the second lens; The third lens satisfies the following conditions: Nd3>1.50, Vd3>35, wherein Nd3 is the light refractive index of the third lens, and Vd3 is the Abbe constant of the third lens; The fourth lens satisfies the following conditions: Nd4>1.65, Vd4>16, wherein Nd4 is the light refractive index of the fourth lens, and Vd4 is the Abbe constant of the fourth lens; The fifth lens satisfies the following conditions: Nd5>1.3, Vd5<25, wherein Nd5 is the light refractive index of the fifth lens, and Vd5 is the Abbe constant of the fifth lens; The high-definition vehicle-mounted lens satisfies the following conditions: BFL / TTL>0.23, wherein BFL is the distance from the center of the image side surface of the last lens along the incident direction of the optical axis to the imaging surface of the high-definition vehicle-mounted lens on the optical axis; TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the high-definition vehicle-mounted lens on the optical axis; The high-definition vehicle-mounted lens meets the following conditions: 0.79≤FOV / h / D≤0.85; Wherein, FOV is the maximum field of view of the high-definition vehicle-mounted lens; D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the high-definition vehicle lens; and h is the image height corresponding to the maximum field of view of the high-definition vehicle-mounted lens; The maximum field of view angle FOV of the high-definition vehicle-mounted lens, the entire focal length value f of the high-definition vehicle-mounted lens and the image height h corresponding to the maximum field of view angle of the high-definition vehicle-mounted lens satisfy the following: 29.5≤(FOV×f) / h≤30.

5.

2. The high-definition vehicle-mounted lens according to claim 1, characterized in that: include: A sixth lens is further provided between the fifth lens and the parallel flat plate along the incident direction of the optical axis. The sixth lens has positive focal power, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface or a concave surface.

3. The high-definition vehicle-mounted lens according to claim 1, characterized in that: The fourth lens and the fifth lens are connected to form a cemented lens.

4. The high-definition vehicle-mounted lens according to claim 1, characterized in that: A separator lens is located between the fourth lens and the fifth lens.

5. The high-definition vehicle-mounted lens according to claim 1, characterized in that: An aperture is provided between the second lens and the third lens.

6. The high-definition vehicle-mounted lens according to claim 2, characterized in that: The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all glass spherical lens sheets.

Images