Wide-angle lens and motor vehicle

Abstract

The application discloses a wide-angle lens and a motor vehicle, the wide-angle lens has an object side and an image side which are oppositely arranged along the optical axis direction, and the wide-angle lens comprises a first lens group with positive focal length, a second lens group with negative focal length and a photosensitive chip which are sequentially arranged from the object side to the image side; the first lens group, the second lens group and the wide-angle lens satisfy the following conditions: 2 < F11 / F < 5 and 1.8 < F22 / F < 4, the focal length ratio of the two lens groups is reasonably set, so that the maximum field angle of the wide-angle lens reaches more than 140 degrees, the image circle can reach 6.9 mm, and the total optical length TTL of the wide-angle lens is controlled within 18 mm, so as to provide a wide-angle lens with small volume, wide view angle and day-night focus.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical technology, in particular to a wide-angle lens and a motor vehicle. BACKGROUND

[0002] With the rapid development and wide application of intelligent safety auxiliary driving monitoring system, the requirements for wide-view vehicle-mounted lenses are continuously improved. Nowadays, wide-angle lenses are continuously developing towards miniaturization, wide view, low distortion, day and night co-focus, and temperature adaptability. Accordingly, the new architecture of wide-angle lenses also needs to be researched and developed.

[0003] Most of the existing day and night co-focus lenses on the market adopt a full glass structure, which has the defects of large volume, heavy weight, large distortion, and poor optical performance. SUMMARY

[0004] The main purpose of the present application is to provide a wide-angle lens and a motor vehicle, which aims to provide a wide-angle lens with larger variable magnification and larger aperture.

[0005] To achieve the above purpose, the present application provides a wide-angle lens, which has an object side and an image side arranged opposite along the optical axis direction, and comprises a first lens group with positive focal power, a second lens group with negative focal power, and a photosensitive chip arranged in sequence from the object side to the image side.

[0006] The first lens group, the second lens group and the wide-angle lens satisfy the following conditions:

[0007] 2<F11 / F<5, and 1.8<F22 / F<4;

[0008] Wherein, F11 is the focal length value of the first lens group, F22 is the focal length value of the second lens group, and F is the focal length value of the wide-angle lens.

[0009] Optionally, the first lens group comprises a first lens, a second lens and a third lens arranged in sequence from the object side to the image side, and the second lens group comprises a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side.

[0010] The focal power of the first lens is negative, and the object side surface of the first lens is convex and the image side surface is concave.

[0011] The focal power of the second lens is negative, and the object side surface of the second lens is convex and the image side surface is concave.

[0012] The focal power of the third lens is positive, and the object side surface of the third lens is convex and the image side surface is convex.

[0013] The fourth lens has positive power, and the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex.

[0014] The fifth lens has negative power, and the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is concave.

[0015] The sixth lens has positive power, and the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is convex.

[0016] Optionally, the first lens and the third lens are glass spherical lenses.

[0017] The second lens, the fourth lens, the fifth lens and the sixth lens are plastic aspherical lenses.

[0018] Optionally, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens satisfy the following conditions:

[0019] -5

[0020] 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, and F6 is the focal length of the sixth lens.

[0021] Optionally, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens satisfy the following conditions:

[0022] Nd1 is the refractive index of the first lens, Nd2 is the refractive index of the second lens, Nd3 is the refractive index of the third lens, Nd4 is the refractive index of the fourth lens, Nd5 is the refractive index of the fifth lens, and Nd6 is the refractive index of the sixth lens.

[0023] 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, and F6 is the focal length of the sixth lens.

[0024] Optionally, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens satisfy the following conditions:

[0025] 1.8 < D1 / r2 < 4, and -2.5 ≤ r3 / r4 ≤ -1.5, and -3 ≤ r6 / r5 ≤ -1.6, and -7 ≤ r8 / r9 ≤ -4, and -0.8 ≤ r9 / r10 ≤ -0.5, and -2 ≤ r11 / r12 ≤ -1;

[0026] wherein, D1 is an aperture of the first lens, r2 is a curvature radius of the first lens close to the image side; r3 is a curvature radius of the second lens close to the object side, r4 is a curvature radius of the second lens close to the image side; r5 is a curvature radius of the third lens close to the object side, r6 is a curvature radius of the third lens close to the image side; r8 is a curvature radius of the fourth lens close to the object side, r9 is a curvature radius of the fourth lens close to the image side; r10 is a curvature radius of the fifth lens close to the image side; r11 is a curvature radius of the sixth lens close to the object side; r12 is a curvature radius of the sixth lens close to the image side.

[0027] Optionally, the fourth lens and the fifth lens are glued to form a glued lens.

[0028] Optionally, a focal length value of the glued lens is F45, wherein -10.5 < F45 / F < -3.4.

[0029] Optionally, the wide-angle lens further comprises a diaphragm, a color filter and a protection glass arranged in sequence from the object side to the image side, the diaphragm is arranged between the first lens group and the second lens group, and the color filter and the protection glass are both arranged between the second lens group and the photosensitive chip.

[0030] The application further provides a motor vehicle, which comprises the above wide-angle lens, the wide-angle lens comprising a first lens group with positive focal length, a second lens group with negative focal length and a photosensitive chip arranged in sequence from the object side to the image side.

[0031] The first lens group, the second lens group and the wide-angle lens satisfy the following conditions:

[0032] 2 < F11 / F < 5, and 1.8 < F22 / F < 4;

[0033] wherein, F11 is a focal length value of the first lens group, F22 is a focal length value of the second lens group, and F is a focal length value of the wide-angle lens.

[0034] In the technical solution provided by the present invention, a first lens group, a second lens group, and a photosensitive chip are arranged sequentially from the object side to the image side. The focal length ratios of the first lens group, the second lens group, and the wide-angle lens satisfy: 2 < F11 / F < 5, and 1.8 < F22 / F < 4. Through the reasonable setting of the focal length ratios of the two lens groups, the maximum field of view of the wide-angle lens reaches more than 140°, the image circle can reach 6.9mm, and the total optical length (TTL) of the wide-angle lens is controlled within 18mm, so as to provide a small-sized, wide-angle lens with day and night confocality. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the wide-angle lens provided by the present invention;

[0037] Figure 2 for Figure 1 MTF curve of a wide-angle lens in the visible light band;

[0038] Figure 3 for Figure 1 MTF curve of the wide-angle lens in the infrared (940nm) band;

[0039] Figure 4 for Figure 1 Defocus curve of a wide-angle lens in the visible light band at an ambient temperature of 20℃;

[0040] Figure 5 for Figure 1 Defocus curve of the wide-angle lens in the infrared (940nm) band at an ambient temperature of 20℃;

[0041] Figure 6 for Figure 1 A diagram showing the lateral aperture fan curve of a wide-angle lens in a video.

[0042] Figure 7 for Figure 1 Field curvature and distortion diagrams of a wide-angle lens;

[0043] Figure 8 for Figure 1 Axial phase difference curve of a wide-angle lens in a video;

[0044] Figure 9 for Figure 1A vertical axis chromatic aberration curve of the wide-angle lens in the image.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] Reference Name Reference Name 10 First lens group 5 Fifth lens 1 First lens 6 Sixth lens 2 Second lens 30 Photosensitive chip 3 Third lens 40 Diaphragm 20 Second lens group 50 Color filter 4 Fourth lens 60 Protective glass

[0047] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0049] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0050] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0051] With the rapid development and wide application of intelligent safety auxiliary driving monitoring system, the requirements for wide-view vehicle-mounted lenses are continuously improved. Today's wide-angle lenses are continuously developing towards miniaturization, wide view, low distortion, day and night co-focus, and temperature adaptability. Accordingly, the new architecture of the wide-angle lens also needs to be researched and developed. Most of the existing day and night co-focus lenses on the market adopt a full glass structure, which has the defects of large size, heavy weight, large distortion and poor optical performance.

[0052] In order to solve the above problems, the present application provides a wide-angle lens,Figures 1 to 9 The specific embodiment of the wide-angle lens provided by the present application.

[0053] Please refer to Figure 1 The wide-angle lens has an object side and an image side arranged oppositely along the optical axis direction, and comprises, in sequence from the object side to the image side, a first lens group 10 with positive focal power, a second lens group 20 with positive focal power, and a photosensitive chip 30.

[0054] The first lens group 10, the second lens group 20 and the wide-angle lens satisfy the following conditions:

[0055] 2<F11 / F<5, and 1.8<F22 / F<4;

[0056] Wherein, F11 is the focal length value of the first lens group 10, F22 is the focal length value of the second lens group 20, and F is the focal length value of the wide-angle lens.

[0057] In the technical solution provided by the present application, the first lens group 10, the second lens group 20 and the photosensitive chip 30 are arranged in sequence from the object side to the image side, the focal length ratio of the first lens group 10, the second lens group 20 and the wide-angle lens satisfies 2<F11 / F<5, and 1.8<F22 / F<4, the focal length ratio of the two lens groups is reasonably set to effectively control the stray light, meet the shooting requirements of the wide-angle lens, and maintain the short, small and thin characteristics of the wide-angle lens as a whole, while correcting various aberrations of visible light and infrared light to maintain high resolution, so that higher imaging quality can be obtained in low-illumination or night environment, the maximum field of view of the wide-angle lens is more than 140°, the image circle is 6.9mm, and the total optical length TTL of the wide-angle lens is controlled within 18mm, so as to provide a wide-angle lens with small size, wide view angle and day and night focusing.

[0058] It should be noted that the total optical length TTL is the distance from the object side center vertex of the first lens 1 to the image surface of the photosensitive chip 30.

[0059] Specifically, in the embodiment, the first lens group 10 includes, sequentially from the object side to the image side, a first lens 1, a second lens 2, and a third lens 3, and the second lens group 20 includes, sequentially from the object side to the image side, a fourth lens 4, a fifth lens 5, and a sixth lens 6; the first lens 1 has a negative focal power, and the object side surface of the first lens 1 is convex, and the image side surface of the first lens 1 is concave; the second lens 2 has a negative focal power, and the object side surface of the second lens 2 is convex, and the image side surface of the second lens 2 is concave; the third lens 3 has a positive focal power, and the object side surface of the third lens 3 is convex, and the image side surface of the third lens 3 is convex; the fourth lens 4 has a positive focal power, and the object side surface of the fourth lens 4 is convex, and the image side surface of the fourth lens 4 is convex; the fifth lens 5 has a negative focal power, and the object side surface of the fifth lens 5 is concave, and the image side surface of the fifth lens 5 is concave; and the sixth lens 6 has a positive focal power, and the object side surface of the sixth lens 6 is convex, and the image side surface of the sixth lens 6 is convex.

[0060] Specifically, because the impact resistance of the resin lens is strong, the weight is light, and the cost is low, the second lens 2, the fourth lens 4, the fifth lens 5, and the sixth lens 6 are plastic aspheric lenses. The cost is effectively controlled by using the plastic aspheric lenses, and the chromatic aberration of the lens can be well corrected by the aspheric lenses, so that the spherical aberration and the sine aberration at the high magnification position are corrected while the purple edge control of the lens is ensured.

[0061] However, because the chemical properties of the plastic material are unstable under the influence of the environmental temperature, the refractive index is weaker than that of the all-glass lens, which leads to a lower picture restoration degree than that of the all-glass lens. In order to ensure the stability of the video lens under the influence of the temperature change, the first lens 1 and the third lens 3 are glass spherical lenses in the embodiment. Because the glass lens is not easily affected by the thermal expansion and contraction to cause the focus shift, the glass lens can well resist the problem of the deformation of the lens caused by the heat, and maintain the high precision of the lens for a long time. Because the reflection of the spherical lens obeys the reflection law of light, the light is converged or diverged, and the aspheric lens can correct the spherical aberration. Under the premise of ensuring the image quality and reliability, the cost is reduced, the assembly sensitivity is low, and the yield of the finished product is improved.

[0062] The wide-angle lens has a regular shape and a simple structure, so that the wide-angle lens is easy to process and assemble, and the wide-angle lens adopts a glass-plastic hybrid material, which not only saves the cost, but also has strong impact resistance, and ensures the stability and high-low temperature applicability of the system.

[0063] Specifically, in the embodiment, the first lens 1, the second lens 2, the third lens 3, the sixth lens 6 satisfy the following conditions: -5<F1 / F<-2.5, and -3<F2 / F<-2, and 1.8<F3 / F<2.7, and 1.4<F6 / F<2.5; 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 3, F4 is the focal length of the fourth lens 4; F5 is the focal length of the fifth lens 5, F6 is the focal length of the sixth lens 6. By limiting 1.8<F3 / F<2.7, the temperature adaptability can be effectively controlled, and the lens has better performance at high or low temperature.

[0064] Specifically, in the embodiment, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6 satisfy the following conditions: Nd1≥1.71, and 1.5≤Nd2≤1.6, and 1.64≤Nd3≤1.87, and 1.49≤Nd4≤1.63, and 1.6≤Nd5≤2, and 1.5≤Nd6≤1.6; wherein, Nd1 is the refractive index of the first lens 1, Nd2 is the refractive index of the second lens 2, Nd3 is the refractive index of the third lens 3, Nd4 is the refractive index of the fourth lens 4, Nd5 is the refractive index of the fifth lens 5, Nd6 is the refractive index of the sixth lens 6. By limiting the first lens 1 to satisfy: Nd1≥1.72, the light in a wide range of view angle can be effectively converged, the aperture of the first lens 1 L1 is reduced, and the optical lens is miniaturized.

[0065] Specifically, in the embodiment, the first lens 1, the fourth lens 4, the fifth lens 5, and the sixth lens 6 satisfy the following conditions: 1.8 < D1 / r2 < 4, and -7 ≤ r8 / r9 ≤ -4, and -0.8 ≤ r9 / r10 ≤ -0.5, and -2 ≤ r11 / r12 ≤ -1; wherein D1 is the aperture of the first lens 1, r2 is the curvature radius of the first lens 1 close to the image side; r8 is the curvature radius of the fourth lens 4 close to the object side, r9 is the curvature radius of the fourth lens 4 close to the image side; r10 is the curvature radius of the fifth lens 5 close to the image side; r11 is the curvature radius of the sixth lens 6 close to the object side; and r12 is the curvature radius of the sixth lens 6 close to the image side. By having a large aperture of the first lens 1, more light information can be collected under the same focal length, achieving the effect of clear imaging in low light, and effectively increasing the monitoring field of view. And by limiting 1.8 < D1 / r2 < 4, the risk of the first lens 1 being super-hemispherical can be effectively controlled, which is beneficial to the processing of the first lens 1; at the same time, the first lens 1 has a certain curvature, which can correct the optical system aberration to a certain extent.

[0066] Further, in order to improve the optical system image quality, reduce light energy loss, increase imaging clarity, protect the scale surface, further optimize the processing flow to meet the design requirements, in the embodiment, the fourth lens 4 and the fifth lens 5 are glued to form a glued lens.

[0067] Specifically, in the embodiment, the focal length value of the glued lens is F45, wherein -10.5 < F45 / F < -3.4.

[0068] Further, the wide-angle lens further comprises a diaphragm 40 arranged between the first lens group 10 and the second lens group 20, which limits the on-axis beam aperture to block part of the light during zooming, reduces the light spot, improves the image contrast, and helps to improve the image quality.

[0069] Further, the wide-angle lens further comprises a color filter 50 and a protective glass 60, both of which are arranged between the second lens group 20 and the photosensitive chip 30. The color filter 50 can effectively filter out stray light in the non-working waveband to reduce light noise, reduce the difficulty of subsequent optoelectronic module processing, and thus improve the imaging quality.

[0070] Specifically, the image side can be understood as the surface of the photosensitive chip 30 facing the object side, i.e. the surface of a CCD or CMOS image sensor, and it can be understood that the light carrying the object information can sequentially pass through the first lens 1, the second lens 2, the third lens 3, the diaphragm 40, the fourth lens 4, the fifth lens 5, the sixth lens 6, the protective glass 60, and finally form an image on the image side.

[0071] Specifically, in an embodiment, the face shape, radius of curvature and thickness of the lens are as shown in the following table:

[0072] Table 1

[0073]

[0074]

[0075] Further, in the present embodiment, the aspherical surface shape of the aspherical lens satisfies the following conditions:

[0076]

[0077] Wherein c is the curvature corresponding to the radius, y is the radial coordinate (its unit is the same as the unit of lens length), k is the conic quadratic curve coefficient, (when the k coefficient is less than -1, the surface curve is a hyperbola, when the k coefficient is equal to -1, it is a parabola, when the k coefficient is between -1 and 0, it is an ellipse, when the k coefficient is equal to 0, it is a circle, and when the k coefficient is greater than 0, it is a flat circle), a1 to a8 respectively represent the coefficients corresponding to each radial coordinate. Please refer to Table 1 and Table 2 below. The shape and size of the aspherical surface of the lens object side and image side can be set by the above parameters.

[0078] Table 2 Conic Coefficients and Aspherical Coefficients of Aspherical Lenses

[0079] a2 a3 a4 a5 a6 a7 a8 S3 4.57E-02 7.97E-02 5.67E-03 -1.34E-01 -1.56E-03 1.55E-02 -5.32E-02 S4 -1.09E-02 -2.11E-02 -4.04E-02 3.69E-03 8.02E-03 -1.15E-02 2.55E-02 S8 1.99E-03 4.71E-03 1.23E-01 5.71E-01 -6.86E-03 5.68E-03 -8.86E-03 S9 -2.52E-04 -9.04E-04 -2.09E-01 -1.14E+00 3.84E-03 -1.66E-03 2.05E-03 S10 2.01E-05 1.23E-04 1.97E-01 1.08E+00 -1.31E-03 2.92E-04 -2.94E-04 S11 -8.97E-07 -9.96E-06 -9.62E-02 -5.07E-01 2.39E-04 -2.79E-05 2.36E-05 S12 1.70E-08 3.51E-07 1.94E-02 9.50E-02 -1.80E-05 1.11E-06 -7.88E-07

[0080] Figure 2 is the MTF curve diagram of the wide-angle lens in the visible light wave band; wherein the abscissa is the spatial frequency, and the ordinate is the contrast; TSDiff.Limit is the diffraction limit in the meridional and sagittal directions, and TS 0.00(deg) represents the diffraction curve in the meridional and sagittal directions at 0.00 field of view on the image plane.

[0081] Figure 3 is the MTF curve diagram of the wide-angle lens in the infrared (940nm) wave band; wherein the abscissa is the spatial frequency, and the ordinate is the contrast; TSDiff.Limit is the diffraction limit in the meridional and sagittal directions, and TS 0.00(deg) represents the diffraction curve in the meridional and sagittal directions at 0.00 field of view on the image plane.

[0082] Figure 4 is a defocus curve diagram of the wide-angle lens at an ambient temperature of 20 DEG C in a visible light wave band, wherein the abscissa is defocus amount in millimeter, and the ordinate is contrast; TS 0.00(deg) represents diffraction curves in meridional and sagittal directions on an image surface of 0.00 field of view.

[0083] Figure 5 is a defocus curve diagram of the wide-angle lens at an ambient temperature of 20 DEG C in an infrared (940 nm) wave band; wherein the abscissa is defocus amount in millimeter, and the ordinate is contrast; TS 0.00(deg) represents diffraction curves in meridional and sagittal directions on an image surface of 0.00 field of view.

[0084] From the above Figure 2 , Figure 3 and Figure 4 , Figure 5 , it can be known that the resolving frequency of the wide-angle lens is 60 lp / mm, the MTF of the center (0, 0) field of view in a visible light wave band can be close to 0.9, the defocus curve is concentrated, and the resolution is high; the MTF of the center (0, 0) field of view in an infrared 940 nm wave band can be close to 0.85, the center (0, 0) field of view is offset from the focus surface of the center (0, 0) field of view in a visible light wave band within 5 um, and the defocus curve is relatively concentrated when FOV < 120 DEG, so it can be known that the infrared confocal degree of the wide-angle lens is better.

[0085] Figure 6 is a lateral light fan curve diagram of the wide-angle lens. Figure 7 is a field curvature and distortion of the wide-angle lens. Figure 8 is an axial difference curve diagram of the wide-angle lens. Figure 9 is a vertical axis chromatic aberration curve diagram of the wide-angle lens.

[0086] From the above Figures 6 to 9 , it can be known that the spherical aberration, field curvature and distortion of the wide-angle lens in the embodiment can be well corrected.

[0087] In summary, in the wide-angle lens, two glass spherical lenses are arranged to ensure good optical lenses, four aspherical lenses are arranged to realize miniaturization, small distortion and improved optical performance, so that the maximum field of view of the wide-angle lens at a wide-angle end is more than 140 DEG, the image circle can reach 6.9 mm, the total optical length is controlled within 18 mm, and the wide-angle lens has the advantages of small volume, wide view angle and day and night confocal performance.

[0088] The application further provides a motor vehicle comprising the wide-angle lens described in the technical solutions above, and the specific structure of the wide-angle lens is referred to the above embodiments. Since the wide-angle lens of the motor vehicle adopts all the technical solutions of the above embodiments, the motor vehicle at least has all the beneficial effects brought by the technical solutions of the above embodiments, and thus will not be described here.

[0089] The above only describes the preferred embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like made by referring to the content of the application specification and drawings within the inventive concept of the application is included in the patent protection scope of the application.

Claims

1. A wide-angle lens, characterized in that, The wide-angle lens has an object side and an image side arranged opposite to each other along the optical axis. The wide-angle lens includes a first lens group with positive optical power, a second lens group with positive optical power, and a photosensitive chip arranged sequentially from the object side to the image side. The first lens group, the second lens group, and the wide-angle lens satisfy the following conditions: 2 < F11 / F < 5, and 1.8 < F22 / F < 4; Wherein, F11 is the focal length of the first lens group, F22 is the focal length of the second lens group, and F is the focal length of the wide-angle lens; The first lens group includes a first lens, a second lens, and a third lens arranged sequentially from the object side to the image side; the second lens group includes a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side. The first lens has a negative optical power, and the object side of the first lens is convex and the image side is concave. The second lens has a negative optical power, and the object side of the second lens is convex and the image side is concave. The third lens has a positive optical power, and the object side and image side of the third lens are both convex. The fourth lens has a positive optical power, and the object side and image side of the fourth lens are both convex. The fifth lens has a negative optical power, and the object side and image side of the fifth lens are concave. The sixth lens has a positive optical power, and both its object-side and image-side surfaces are convex.

2. The wide-angle lens as described in claim 1, characterized in that, The first lens and the third lens are glass spherical lenses; The second lens, the fourth lens, the fifth lens, and the sixth lens are plastic aspherical lenses.

3. The wide-angle lens as described in claim 1, characterized in that, The first lens, the second lens, the third lens, and the sixth lens satisfy the following conditions: -5 < F1 / F < -2.5, and -3 < F2 / F < -2, and 1.8 < F3 / F < 2.7, and 1.4 < F6 / F < 2.5; 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, and F6 is the focal length of the sixth lens.

4. The wide-angle lens as described in claim 1, characterized in that, The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens satisfy the following conditions: Nd1 ≥ 1.71, and 1.5 ≤ Nd2 ≤ 1.6, and 1.64 ≤ Nd3 ≤ 1.87, and 1.49 ≤ Nd4 ≤ 1.63, and 1.6 ≤ Nd5 ≤ 2, and 1.5 ≤ Nd6 ≤ 1.6; Wherein, Nd1 is the refractive index of the first lens, Nd2 is the refractive index of the second lens, Nd3 is the refractive index of the third lens, Nd4 is the refractive index of the fourth lens, Nd5 is the refractive index of the fifth lens, and Nd6 is the refractive index of the sixth lens.

5. The wide-angle lens as described in claim 1, characterized in that, The first lens, the fourth lens, the fifth lens, and the sixth lens satisfy the following conditions: 1.8 < D1 / r2 < 4, and -7 ≤ r8 / r9 ≤ -4, and -0.8 ≤ r9 / r10 ≤ -0.5, and -2 ≤ r11 / r12 ≤ -1; Wherein, D1 is the aperture of the first lens, r2 is the radius of curvature of the first lens near the image side; r8 is the radius of curvature of the fourth lens near the object side; r9 is the radius of curvature of the fourth lens near the image side; r10 is the radius of curvature of the fifth lens near the image side; r11 is the radius of curvature of the sixth lens near the object side; and r12 is the radius of curvature of the sixth lens near the image side.

6. The wide-angle lens as described in claim 1, characterized in that, The fourth and fifth lenses are cemented together to form a cemented lens.

7. The wide-angle lens as described in claim 6, characterized in that, The focal length of the cemented lens is F45, where -10.5 < F45 / F < -3.

4.

8. The wide-angle lens as described in claim 1, characterized in that, The wide-angle lens also includes an aperture stop, a color filter, and a protective glass arranged sequentially from the object side to the image side. The aperture stop is located between the first lens group and the second lens group, and the color filter and the protective glass are both located between the second lens group and the photosensitive chip.

9. A motor vehicle, characterized in that, Including the wide-angle lens as described in any one of claims 1 to 8.

Images