Optical lenses, camera modules, electronic devices and vehicles

Abstract

The present invention discloses an optical lens, a camera module, an electronic device and a vehicle. The optical lens includes, from the object side to the image side, a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with positive refractive power, wherein the object side of the fourth lens is convex near the optical axis, a fifth lens with negative refractive power, and a sixth lens with positive refractive power; the optical imaging system also includes an aperture; the optical lens satisfies the following relationship: 12.6mm<2*f*tan(FOV / 2)<14.5mm, wherein f is the effective focal length of the optical lens, and FOV is the maximum field of view of the optical lens. The product of the effective focal length of the optical lens of the embodiment of the present invention and the tangent value of half the maximum field of view multiplied by 2 is between 12.6mm and 14.5mm, which is conducive to controlling the distortion of the entire optical lens, so that the distortion of the optical lens is small, thereby improving the resolution of the optical lens, reducing the distortion risk of the picture taken at a larger angle, and improving the imaging quality of the optical lens.

Description

Technical Field

[0001] The present invention relates to optical imaging technology, and in particular to an optical lens, a camera module, an electronic device and a vehicle. Background Art

[0002] With the rapid development of economy and technology, cars have become an essential means of transportation for every household. However, due to structural limitations, cars have multiple visual blind spots. Since drivers cannot see these blind spots while driving, the risk of traffic accidents is easily increased.

[0003] Existing cars are generally equipped with an on-board camera module, which can capture the environment around the car and transmit it to a display device so that users can more intuitively obtain the environment around the car to prevent traffic accidents caused by blind spots. In order to increase the shooting range of the camera module, how to reduce the distortion risk of the picture taken at a larger angle has become a research topic. Summary of the invention

[0004] In view of this, embodiments of the present invention provide an optical lens, a camera module, an electronic device and a vehicle.

[0005] The optical lens of the embodiment of the present invention comprises, from the object side to the image side, a first lens having negative refractive power, a second lens having negative refractive power, a third lens having positive refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, and a sixth lens having positive refractive power. The object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis. The object side surface of the second lens is convex near the optical axis, the object side surface of the fourth lens is convex near the optical axis, the image side surface of the fourth lens is convex near the optical axis, the object side surface of the fifth lens is concave near the optical axis, the image side surface of the fifth lens is concave near the optical axis, and the sixth lens is convex or concave near the optical axis. The optical imaging system further comprises an aperture, and the optical lens satisfies the following relationship: 12.6mm<2*f*tan(FOV / 2)<14.5mm, wherein f is the effective focal length of the optical lens, and FOV is the maximum field of view of the optical lens.

[0006] The product of the effective focal length of the optical lens of the embodiment of the present invention and the tangent value of half the maximum field of view angle multiplied by 2 is between 12.6 mm and 14.5 mm, which is beneficial to controlling the distortion of the entire optical lens, making the distortion of the optical lens smaller, thereby improving the resolution of the optical lens, reducing the distortion risk of images shot at larger angles, and improving the imaging quality of the optical lens.

[0007] In some embodiments, the optical lens can be used in both the visible light or infrared bands.

[0008] This can increase the number of application scenarios of the optical lens, which is beneficial to user use.

[0009] In some embodiments, both the object side and the image side of at least one lens of the optical lens are plastic aspherical surfaces, and the Abbe number of at least one lens in the optical lens satisfies the following relational expression:

[0010] Vd < 24.

[0011] When the above relational expression is satisfied, it is beneficial to the correction of chromatic aberration of the optical lens and improves the imaging quality of the optical lens.

[0012] In some embodiments, the optical lens satisfies the following relational expression:

[0013] 0.5 < Sagf2 / CT1 < 2.5;

[0014] Wherein, Sagf2 is the sagittal height of the image side of the first lens at the maximum effective aperture, and CT1 is the thickness of the first lens on the optical axis.

[0015] When the above relational expression is satisfied, it is possible to avoid the excessive central thickness or the overly curved image side of the first lens while meeting the refractive power requirement, which is beneficial to the processing of the first lens and reduces the production cost of the optical lens. Exceeding the lower limit of the conditional expression 0.5 < Sagf2 / CT1 < 2.5, the thickness value of the first lens is too large, which will increase the weight of the optical lens and is not conducive to the lightweight and miniaturization of the optical lens; exceeding the upper limit of the conditional expression 0.5 < Sagf2 / CT1 < 2.5, the image side of the first lens is overly curved, the processing difficulty of the first lens increases, and the production cost of the first lens increases. At the same time, the overly curved image side of the first lens is prone to produce marginal aberration, which is not conducive to the improvement of the imaging quality of the optical lens.

[0016] In some embodiments, the optical lens satisfies the following relational expression:

[0017] -7.7 < f2 / CT2 < -4.2;

[0018] Wherein, f2 is the focal length of the second lens, and CT2 is the thickness of the second lens on the optical axis.

[0019] When the above - mentioned relational expressions are satisfied, the tolerance sensitivity of the central thickness of the second lens can be reduced, the processing difficulty of a single lens can be decreased, which is beneficial to improving the assembly yield of the optical lens and further reducing the production cost. By satisfying the relational expression - 7.7 < f2 / CT2 < - 4.2, it is possible to avoid an overly large focal length of the second lens and avoid astigmatism that is difficult to correct in the optical lens, thereby reducing the imaging quality of the optical lens. At the same time, it is possible to avoid the central thickness of the second lens being too large or too small. The larger the central thickness of the second lens, the greater the weight of the second lens, which is not conducive to the lightweight feature of the optical lens. If the central thickness of the second lens is too small, the processing difficulty of the second lens is relatively high.

[0020] In some embodiments, the optical lens satisfies the following relational expression:

[0021] -3.4 < f5 / CT5 ≤ -1.8;

[0022] Wherein, f5 is the focal length of the fifth lens, and CT5 is the thickness of the fifth lens on the optical axis.

[0023] When the above - mentioned relational expressions are satisfied, it is possible to avoid an overly large focal length of the fifth lens and avoid astigmatism that is difficult to correct in the lens system, thereby reducing the imaging quality of the optical lens. At the same time, it is possible to avoid the central thickness of the fifth lens being too large or too small. The larger the central thickness of the fifth lens, the greater the weight of the fifth lens, which is not conducive to the lightweight feature of the optical lens. If the central thickness of the fifth lens is too small, the processing difficulty of the fifth lens is relatively high.

[0024] In some embodiments, the optical lens satisfies the following relational expression:

[0025] 1.8 < f6 / CT6 < 3;

[0026] Wherein, f6 is the focal length of the sixth lens, and CT6 is the thickness of the sixth lens on the optical axis.

[0027] When the above - mentioned relational expressions are satisfied, it is beneficial to reduce the exit angle of the light beam exiting the lens group, and then reduce the angle at which the light beam enters the photosensitive element, improve the photosensitive performance of the photosensitive element, and thus improve the imaging quality of the optical lens. If it exceeds the upper limit of the relational expression 1.8 < f6 / CT6 < 3, the focal length of the sixth lens is too long and the refractive power is insufficient, then the angle at which the light beam enters the photosensitive element is relatively large, resulting in insufficient recognition of the information of the object to be photographed by the photosensitive element and causing imaging distortion. If it exceeds the lower limit of the conditional expression 1.8 < f6 / CT6 < 3, on the premise of meeting the optical performance, the central thickness of the sixth lens is too large, and the plastic lens is sensitive to thermal deformation, resulting in a decrease in the thermal stability of the optical lens.

[0028] In some embodiments, the optical lens satisfies the following relational expression:

[0029] 4mm 2 <(f1 * f2 * f3) / f < 7.5mm 2 ;

[0030] Wherein, f1, f2, and f3 are the focal lengths of the first lens, the second lens, and the third lens respectively, and f is the effective focal length of the optical lens.

[0031] When the above relational expression is satisfied, it is beneficial to control the convergence of the light beam of the front lens group of the optical lens, enable light rays with a large angular field of view to enter the optical lens, ensure the wide-angle of the optical lens, and at the same time, the combination of positive and negative lenses in the lens group can correct each other's aberrations and improve the resolution, thereby improving the imaging quality of the optical lens.

[0032] In some embodiments, the optical lens satisfies the following relational expression:

[0033] 2.1 < f45 / f < 4.7;

[0034] Wherein, f45 is the combined focal length of the fourth lens and the fifth lens, and f is the effective focal length of the optical lens.

[0035] When the above relational expression is satisfied, it is beneficial to reduce the angle of the light beam exiting the optical system after being refracted by the lens group, thereby reducing the incident angle of the light rays entering the photosensitive element of the optical lens, improving the photosensitive performance of the photosensitive element, and improving the imaging quality of the optical lens. By setting a lens group including the fourth lens with a positive refractive power and the fifth lens with a negative refractive power, the aberration generated by the refraction of the light rays by the front lens is corrected, and the system resolution is improved; if it exceeds the upper limit of the relational expression 2.1 < f45 / f < 4.7, it is not easy to suppress the occurrence of high-order aberrations caused by the light beam in the peripheral part of the imaging region; if it exceeds the lower limit of the conditional expression 2.1 < f45 / f < 4.7 of the relational expression, it is not conducive to suppressing chromatic aberration and obtaining high-resolution performance.

[0036] In some embodiments, the optical lens satisfies the following relational expression:

[0037] 6.1 < TTL / f < 7.2;

[0038] Wherein, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and f is the effective focal length of the optical lens.

[0039] When the above relationship 6.1 < TTL / f < 7.2 is satisfied, by defining the relationship between the total length of the optical lens and the focal length of the optical lens, the total optical length of the optical lens is controlled to meet the characteristics of miniaturization of the optical lens. Exceeding the upper limit of the relationship 6.1 < TTL / f < 7.2, the total length of the optical lens is too long, which is not conducive to miniaturization; exceeding the lower limit of the relationship 6.1 < TTL / f < 7.2, the focal length of the optical lens is too long, which is not conducive to meeting the field of view angle range of the optical lens and cannot obtain sufficient object space information.

[0040] The camera module according to an embodiment of the present invention includes the optical lens and the photosensitive element according to any one of the above embodiments, and the photosensitive element is disposed on the image side of the optical lens.

[0041] In the camera module according to an embodiment of the present invention, the distortion of the optical lens is small, thereby improving the resolution ability of the optical lens, reducing the risk of distortion of the captured image at a large angle, and improving the imaging quality of the optical lens on the photosensitive element.

[0042] The electronic device according to an embodiment of the present invention includes a housing and the camera module described above, and the camera module is mounted on the housing.

[0043] The electronic device according to an embodiment of the present invention employs the above camera module. Since the distortion of the optical lens is small and the resolution ability is high, the electronic device has better shooting ability.

[0044] The vehicle according to an embodiment of the present application includes a vehicle body and the camera module described above, and the camera module is disposed on the vehicle body. By adopting the above camera module according to an embodiment of the present invention, a larger viewing angle range can be obtained, and it is ensured that high-quality images can be obtained through the above camera module.

[0045] The additional aspects and advantages of the embodiments of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0047] Figure 1 is a schematic structural diagram of the optical lens according to Embodiment 1 of the present invention;

[0048] Figure 2 is a longitudinal spherical aberration curve, astigmatism curve and distortion curve diagram of the optical lens disclosed in Embodiment 1 of the present invention;

[0049] Figure 3 is a schematic structural diagram of the optical lens according to Embodiment 2 of the present invention;

[0050] Figure 4 Graphs showing longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical lens disclosed in Embodiment 2 of the present invention;

[0051] Figure 5 is a schematic structural diagram of an optical lens according to a third embodiment of the present invention;

[0052] Figure 6 Graphs showing longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical lens disclosed in Embodiment 3 of the present invention;

[0053] Figure 7 is a schematic structural diagram of an optical lens according to a fourth embodiment of the present invention;

[0054] Figure 8 Graphs showing longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical lens disclosed in Embodiment 4 of the present invention;

[0055] Fig. 9 is a schematic structural diagram of an optical lens according to a fifth embodiment of the present invention;

[0056] Fig.10 Graphs showing longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical lens disclosed in Embodiment 5 of the present invention;

[0057] Fig.11 is a schematic structural diagram of an optical lens according to a sixth embodiment of the present invention;

[0058] Fig.12 Graphs showing longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical lens disclosed in Example 6 of the present invention;

[0059] Fig.13 is a schematic structural diagram of a camera module according to an embodiment of the present invention;

[0060] Fig.14 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;

[0061] Fig.15 It is a schematic plan view of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0062] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0066] See also Figure 1 The optical lens 10 of the embodiment of the present invention includes, from the object side to the image side, a first lens L1 with negative refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, and a sixth lens L6 with positive refractive power.

[0067] The first lens L1 has an object-side surface S1 and an image-side surface S2. The object-side surface S1 of the first lens L1 is a convex surface near the optical axis Z, and the image-side surface S2 of the first lens L1 is a concave surface near the optical axis Z. The second lens L2 has an object-side surface S3 and an image-side surface S4. The object-side surface S3 of the second lens L2 is a convex surface near the optical axis Z. The third lens L3 has an object-side surface S5 and an image-side surface S6. The image-side surface S6 of the third lens L3 is a concave surface or a convex surface near the optical axis Z. The fourth lens L4 has an object-side surface S7 and an image-side surface S8. The object-side surface S7 of the fourth lens L4 is a convex surface near the optical axis Z, and the image-side surface S8 of the fourth lens L4 is a convex surface near the optical axis Z. The fifth lens L5 has an object-side surface S9 and an image-side surface S10. The object-side surface S9 of the fifth lens L5 is a concave surface near the optical axis Z, and the image-side surface S10 of the fifth lens L5 is a concave surface near the optical axis Z. The sixth lens L6 has an object-side surface S11 and an image-side surface S12 . The image-side surface S12 of the sixth lens L6 is a convex surface or a concave surface near the optical axis Z.

[0068] In an embodiment of the present invention, the optical lens 10 also includes an aperture STO. Among them, the aperture STO can be an aperture aperture or a field aperture. The embodiment of the present invention is described by taking the aperture STO as an example. The aperture STO is arranged between the third lens L3 and the fourth lens L4. Of course, in other embodiments, the aperture STO can also be arranged at other positions. For example, in other embodiments, the aperture STO can be arranged on the surface of any lens, or between any two lenses, or between the sixth lens L6 and the protective glass L7. The specific position of the aperture STO can be set according to actual conditions, which is not limited here. The optical lens 10 can better control the amount of light entering, thereby improving the imaging effect and improving the imaging quality of the optical lens 10 through a reasonable aperture STO position setting.

[0069] Furthermore, in the embodiments of the present invention, a larger field of view angle and improved resolution can be achieved through reasonable lens configuration, thereby improving the quality of imaging and facilitating user use.

[0070] Furthermore, the optical lens 10 satisfies the following relationship:

[0071] 12.6mm<2*f*tan(FOV / 2)<14.5mm;……(1)

[0072] Wherein, f is the effective focal length of the optical lens 10 , and FOV is the maximum field of view of the optical lens 10 .

[0073] That is to say, 2*f*tan(FOV / 2) can be any value in the interval (12.6, 14.5), in mm, for example, 12.7, 12.8, 12.9, 13, 13.1, 13.2, 13.3, 13.5, 13.8, 13.9, 14, 14.2, 14.3, 14.4, etc.

[0074] The product of the effective focal length of the optical lens 10 of the embodiment of the present invention and the tangent value of half the maximum field of view multiplied by 2 is between 12.6 mm and 14.5 mm, which is beneficial to controlling the distortion of the entire optical lens 10, so that the distortion of the optical lens 10 is smaller, thereby improving the resolution of the optical lens 10, reducing the distortion risk of images shot at larger angles, and improving the imaging quality of the optical lens 10.

[0075] In some embodiments, the optical lens 10 can be used in both visible light and infrared bands.

[0076] This can increase the number of application scenarios of the optical lens 10, which is beneficial for users.

[0077] In some embodiments, the object side surface and the image side surface of at least one lens of the optical lens 10 are both plastic aspherical surfaces, and the Abbe number of at least one lens in the optical lens 10 satisfies the following relationship:

[0078] Vd<24; ……(2)

[0079] That is to say, Vd can be any value less than 24, for example, the value is 23, 22, 21, 18, 15, 12, 11, 9, 8, 7, 6, 4, 3, 2, 1, etc.

[0080] When the above relationship is satisfied, it is beneficial for the optical lens 10 to correct chromatic aberration, thereby improving the imaging quality of the optical lens 10 .

[0081] In addition, since the object side surface and the image side surface of at least one lens of the optical lens 10 are both plastic aspherical surfaces, the overall weight of the optical lens 10 can be reduced, making the optical lens 10 lighter and more convenient to use.

[0082] In some embodiments, the optical lens 10 satisfies the following relationship:

[0083] 0.5 <Sagf2 / CT1<2.5;……(3)

[0084] Wherein, Sagf2 is the sag height of the image side surface S2 of the first lens L1 at the maximum effective aperture, and the sag height is the distance from the center of the image side surface S2 of the first lens L1 to the maximum effective aperture of the surface in the direction parallel to the optical axis Z; when the value is positive, in the direction parallel to the optical axis of the optical lens 10, the maximum effective aperture of the surface is closer to the image side of the system than the center of the surface; when the value is negative, in the direction parallel to the optical axis Z of the system, the maximum effective aperture of the surface is closer to the object side of the system than the center of the surface. CT1 is the thickness of the first lens L1 on the optical axis Z.

[0085] That is to say, Sagf2 / CT1 can be any value in the interval (0.5, 2.5), for example, the value is 0.51, 0.52, 0.53, 0.54, 0.56, 0.58, 0.6, 0.7, 0.8, 0.9, 1.0, 1.2, 1.5, 1.6, 1.8, 2.0, 2.2, 2.4, etc.

[0086] When the above relationship (3) is satisfied, it is possible to avoid the first lens L1 having too large a central thickness or too much curvature of the image side surface S2 while meeting the refractive power requirement, which is beneficial to the processing of the first lens L1 and reduces the production cost of the optical lens 10. If the lower limit of the conditional formula (3) is exceeded, the thickness of the first lens L1 is too large, which will increase the weight of the optical lens 10, which is not conducive to the lightweight and miniaturization of the optical lens 10; if the upper limit of the conditional formula (3) is exceeded, the image side surface S2 of the first lens L1 is too curved, the processing difficulty of the first lens L1 increases, and the production cost of the first lens L1 increases. At the same time, the image side surface S2 of the first lens L1 is too curved, which is prone to edge aberration, which is not conducive to the improvement of the imaging quality of the optical lens 10.

[0087] In some embodiments, the optical lens 10 satisfies the following relationship:

[0088] -7.7 <f2 / CT2<-4.2;……(4)

[0089] Wherein, f2 is the focal length of the second lens L2, and CT2 is the thickness of the second lens L2 on the optical axis Z.

[0090] That is to say, f2 / CT2 can be any value in the range of (-7.7, -4.2), for example, the value is -7.6, -7.5, -7.4, -7.3, -7, -6, -5.5, -5.2, -4.8, -4.6, -4.4, -4.3, -4.25, etc.

[0091] When the relation (4) is satisfied, the tolerance sensitivity of the center thickness of the second lens L2 can be reduced, the difficulty of the processing of the single lens can be reduced, which is beneficial to improving the assembly yield of the optical lens 10 and further reducing the production cost. By satisfying the relation (4), the focal length of the second lens L2 can be prevented from being too large, and the optical lens 10 can be prevented from having a difficult-to-correct astigmatism, thereby reducing the imaging quality of the optical lens 10; at the same time, the center thickness of the second lens L2 can be prevented from being too large or too small. The larger the center thickness of the second lens L2, the heavier the weight of the second lens L2, which is not conducive to the lightweight feature of the optical lens 10. The smaller the center thickness of the second lens L2, the more difficult the processing of the second lens L2 is.

[0092] In some embodiments, the optical lens 10 satisfies the following relationship:

[0093] -3.4 <f5 / CT5≤-1.8;……(5)

[0094] Wherein, f5 is the focal length of the fifth lens L5, and CT5 is the thickness of the fifth lens L5 on the optical axis Z.

[0095] That is to say, f5 / CT5 can be any value in the range of (-3.4, -1.8), for example, the value can be -3.3, -3.2, -3.1, -3, -2.8, -2.7, -2.6, -2.5, -2.4, -2.3, -2.1, -2.0, -1.9, etc.

[0096] When the above relationship (5) is satisfied, the focal length of the fifth lens L5 should be prevented from being too large, and the lens system should be prevented from generating astigmatism that is difficult to correct, thereby reducing the imaging quality of the optical lens 10. At the same time, the center thickness of the fifth lens L5 should be prevented from being too large or too small. The larger the center thickness of the fifth lens L5, the heavier the weight of the fifth lens L5, which is not conducive to the lightweight feature of the optical lens 10. The smaller the center thickness of the fifth lens L5, the more difficult the processing technology of the fifth lens L5 is.

[0097] In some embodiments, the optical lens 10 satisfies the following relationship:

[0098] 1.8 <f6 / CT6<3;……(6)

[0099] Wherein, f6 is the focal length of the sixth lens L6, and CT6 is the thickness of the sixth lens L6 on the optical axis Z.

[0100] That is to say, f6 / CT6 can be any value in the interval (1.8, 3), for example, the value is 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, etc.

[0101] When the above relationship (6) is satisfied, it is beneficial to reduce the angle of the light beam exiting the lens group, thereby reducing the angle at which the light beam enters the photosensitive element 20, improving the photosensitivity of the photosensitive element 20, and thus improving the imaging quality of the optical lens 10. If the upper limit of the relationship (6) is exceeded, the focal length of the sixth lens L6 is too long, the refractive power is insufficient, and the angle at which the light beam enters the photosensitive element 20 is large, resulting in insufficient information about the subject to be recognized by the photosensitive element 20 and image distortion; if the lower limit of the conditional relationship (6) is exceeded, under the premise of satisfying the optical performance, the center thickness of the sixth lens L6 is too large, the plastic lens is sensitive to thermal deformation, and the thermal stability of the optical lens 10 is reduced.

[0102] In some embodiments, the optical lens 10 satisfies the following relationship:

[0103] 4mm 2 <(f1*f2*f3) / f<7.5mm 2 ; ……(7)

[0104] Wherein, f1*f2*f3 are the focal lengths of the first lens L1, the second lens L2 and the third lens L3 respectively, and f is the effective focal length of the optical lens 10.

[0105] That is to say, (f1*f2*f3) / f can be any value in the interval (4, 7.5), in mm 2 For example, the values ​​are 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.8, 5, 5.5, 5.6, 5.9, 6.2, 6.3, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, etc.

[0106] When the above relationship (7) is satisfied, it is beneficial to control the convergence of the light beam of the front lens group of the optical lens 10, so that the light beam with a large angle of view enters the optical lens 10, thereby ensuring the wide angle of the optical lens 10. At the same time, the positive and negative lens combinations in the lens group can correct the phase difference with each other, thereby improving the resolution and thus improving the imaging quality of the optical lens 10.

[0107] In some embodiments, the optical lens 10 satisfies the following relationship:

[0108] 2.1 <f45 / f<4.7;……(8)

[0109] Wherein, f45 is the combined focal length of the fourth lens L4 and the fifth lens L5, and f is the effective focal length of the optical lens 10.

[0110] That is to say, f45 / f can be any value in the interval (2.1, 4.7), for example, the value is 2.2, 2.3, 2.5, 2.8, 2.9, 3.2, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, etc.

[0111] When the above relational expression (8) is satisfied, it is beneficial to reduce the angle of the light emitted from the optical system after being refracted by the lens group, thereby reducing the incident angle of the light entering the photosensitive element 20 of the optical lens 10, improving the photosensitivity of the photosensitive element 20, and improving the imaging quality of the optical lens 10. By setting a lens group including a fourth lens L4 with positive refractive power and a fifth lens L5 with negative refractive power, the aberration generated by the refracted light by the front lens is corrected, and the system resolution is improved; if the upper limit of relational expression (8) is exceeded, it is not easy to suppress the occurrence of high-order aberrations caused by the light beam in the peripheral part of the imaging area; if the lower limit of relational expression condition (8) is exceeded, it is not conducive to suppressing achromatism and obtaining high resolution performance.

[0112] In some embodiments, the optical lens 10 satisfies the following relationship:

[0113] 6.1 <TTL / f<7.2;……(9)

[0114] Wherein, TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface S15 of the optical lens 10 on the optical axis Z, and f is the effective focal length of the optical lens 10 .

[0115] That is to say, TTL / f can be any value in the range of (6.1, 7.2), for example, the value is 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.15, 7.18, 7.19, etc.

[0116] When the above relation (9) is satisfied, the total optical length of the optical lens 10 is controlled by limiting the relationship between the total optical length of the optical lens 10 and the focal length of the optical lens 10, so as to satisfy the miniaturization feature of the optical lens 10. If the upper limit of relation (9) is exceeded, the total length of the optical lens 10 is too long, which is not conducive to miniaturization; if the lower limit of relation (9) is exceeded, the focal length of the optical lens 10 is too long, which is not conducive to satisfying the field of view angle range of the optical lens 10, and sufficient object space information cannot be obtained.

[0117] In some embodiments, the optical lens 10 further includes a protective glass L7. When the optical lens 10 is used for imaging, light emitted or reflected by the object enters the optical lens 10 from the object side, and sequentially passes through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the protective glass L7, and finally converges on the imaging surface.

[0118] In some embodiments, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may all be plastic lenses or glass lenses. The cost of plastic lenses is relatively low, which is conducive to reducing the cost of the entire optical lens 10; while glass lenses are not easily subject to thermal expansion and contraction due to changes in ambient temperature, making the imaging quality of the optical lens 10 relatively stable. In some embodiments, at least one surface of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 is an aspherical surface. The optical lens 10 can effectively reduce the total length of the optical lens 10 by adjusting the radius of curvature and the aspherical coefficient of each lens surface, and can effectively correct aberrations and improve imaging quality.

[0119] In the embodiment of the present invention, the object-side surface and the image-side surface of the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all aspherical surfaces and are made of plastic material to achieve the design of an ultra-thin infrared lens.

[0120] The shape of the aspheric surface is determined by the following formula (10): ...(10)Wherein, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, r is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula.

[0121] Specifically, the object-side surface S1 and the image-side surface S2 of the first lens L1 , and the object-side surface S13 and the image-side surface S14 of the protective glass L7 are all spherical surfaces, and the first lens L1 and the protective glass L7 are both made of glass.

[0122] Embodiment 1:

[0123] See also Figure 1 In Embodiment 1, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has positive refractive power.

[0124] The object side surface S1 is a convex surface near the optical axis Z, and the image side surface S2 is a concave surface near the optical axis Z. The object side surface S3 is a convex surface near the optical axis Z, and the image side surface S4 is a concave surface near the optical axis Z. The object side surface S5 is a convex surface near the optical axis Z, and the image side surface S6 is a concave surface near the optical axis Z. The object side surface S7 is a convex surface near the optical axis Z, and the image side surface S8 is a convex surface near the optical axis Z. The object side surface S9 is a concave surface near the optical axis Z, and the image side surface S10 is a concave surface near the optical axis Z. The object side surface S11 is a convex surface near the optical axis Z, and the image side surface S12 is a convex surface near the optical axis Z.

[0125] The optical lens 10 meets the conditions of the following table:

[0126] Table 1

[0127]

[0128]

[0129] In Table 1, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; the units of Y radius (curvature radius), thickness, and focal length are mm. The reference wavelength of the focal length is 632.8 nm; the reference wavelengths of the refractive index and the Abbe number are both 587.56 nm.

[0130] Table 2 below lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces (S3, S4, S5, S6, S7, S8, S9, S10, S11, S12) of the optical lens 10 of Example 1, and these coefficients are obtained by the above-mentioned aspheric surface formula (10).

[0131] Table 2

[0132] Surface number S3 S4 S5 S6 S7 K 0.000E+00 -1.704E+00 0.000E+00 0.000E+00 0.000E+00 A4 -3.530E-01 2.133E+00 3.713E-01 -8.954E-01 -1.225E+00 A6 -2.564E+00 -1.917E+01 -5.458E+00 3.041E+00 3.066E+00 A8 2.443E+00 9.380E+01 4.816E+01 -3.848E+00 -1.256E+01 A10 2.909E+00 -4.090E+02 -2.559E+02 2.445E+00 7.447E+01 A12 -5.644E+00 1.129E+03 6.085E+02 -7.817E-01 -3.826E+02 A14 3.055E+00 -1.557E+03 -5.209E+02 1.007E-01 9.408E+02 A16 -5.533E-01 8.301E+02 0.000E+00 0.000E+00 -8.061E+02 A18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 Surface number S8 S9 S10 S11 S12 K -3.605E-01 -2.382E-01 0.000E+00 -3.217E+00 0.000E+00 A4 -1.510E+00 -8.367E-01 -3.108E+00 -2.176E+00 4.800E-01 A6 1.592E+01 1.916E+01 2.409E+01 1.471E+01 -2.071E+00 A8 1.045E+01 -2.843E+01 -1.071E+02 -6.591E+01 3.424E+00 A10 -6.783E+02 -4.951E+02 3.090E+02 1.933E+02 -1.957E+00 A12 3.000E+03 2.369E+03 -6.023E+02 -3.435E+02 0.000E+00 A14 -5.200E+03 -3.962E+03 6.986E+02 3.271E+02 0.000E+00 A16 3.268E+03 2.314E+03 -3.469E+02 -1.279E+02 0.000E+00 A18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0133] Figure 2 A to Figure 2 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the first embodiment.

[0134] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 2 When the wavelengths given in A are 865.0000nm, 850.0000nm, 835.0000nm, 632.8000nm, 610.1809nm, 587.5618nm, 546.0740nm, and 479.9914nm, respectively, the focus shifts of different fields of view are all within ±0.05mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0135] The horizontal axis of the astigmatism curve graph represents the focus shift, and the vertical axis represents the field angle. Figure 2 The astigmatism curve given in B shows that when the wavelength is 632.8000nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.05mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0136] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the field of view angle. Figure 2The distortion curve given in C indicates that the distortion is within ±80% when the wavelength is 632.8000 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0137] Embodiment 2:

[0138] See also Figure 3 In the second embodiment, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has positive refractive power.

[0139] The object side surface S1 is a convex surface near the optical axis Z, and the image side surface S2 is a concave surface near the optical axis Z. The object side surface S3 is a convex surface near the optical axis Z, and the image side surface S4 is a concave surface near the optical axis Z. The object side surface S5 is a convex surface near the optical axis Z, and the image side surface S6 is a concave surface near the optical axis Z. The object side surface S7 is a convex surface near the optical axis Z, and the image side surface S8 is a convex surface near the optical axis Z. The object side surface S9 is a concave surface near the optical axis Z, and the image side surface S10 is a concave surface near the optical axis Z. The object side surface S11 is a convex surface near the optical axis Z, and the image side surface S12 is a convex surface near the optical axis Z.

[0140] The optical lens 10 meets the conditions of the following table:

[0141] Table 3

[0142]

[0143]

[0144] In Table 3, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; the units of Y radius (curvature radius), thickness, and focal length are mm. The reference wavelength of the focal length is 610.0 nm; the reference wavelengths of the refractive index and the Abbe number are both 587.56 nm.

[0145] Table 4 below lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface (S3, S4, S5, S6, S7, S8, S9, S10, S11, S12) of the optical lens 10 of Example 2, and these coefficients are obtained by the above-mentioned aspherical surface formula (10).

[0146] Table 4

[0147] Surface number S3 S4 S5 S6 S7 K 0.000E+00 -1.787E+00 0.000E+00 0.000E+00 0.000E+00 A4 -6.218E-01 1.803E+00 3.161E-01 -1.135E+00 -1.533E+00 A6 -1.966E+00 -1.905E+01 -5.662E+00 3.880E+00 4.255E+00 A8 3.092E+00 1.017E+02 4.598E+01 -5.495E+00 -1.908E+01 A10 -7.302E-01 -4.458E+02 -2.428E+02 4.096E+00 8.422E+01 A12 -1.233E+00 1.223E+03 5.916E+02 -1.586E+00 -2.847E+02 A14 8.881E-01 -1.702E+03 -5.214E+02 2.522E-01 5.813E+02 A16 -1.726E-01 9.258E+02 0.000E+00 0.000E+00 -4.735E+02 A18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 Surface number S8 S9 S10 S11 S12 K -5.968E-01 -3.433E-01 0.000E+00 -3.254E+00 0.000E+00 A4 -7.015E-01 -3.008E-01 -2.990E+00 -1.832E+00 5.143E-01 A6 -9.566E-01 7.305E+00 2.151E+01 1.165E+01 -1.805E+00 A8 1.474E+02 5.952E+01 -9.095E+01 -4.816E+01 2.745E+00 A10 -1.257E+03 -7.350E+02 2.652E+02 1.291E+02 -1.633E+00 A12 4.411E+03 2.499E+03 -5.538E+02 -2.095E+02 0.000E+00 A14 -7.114E+03 -3.571E+03 6.961E+02 1.823E+02 0.000E+00 A16 4.382E+03 1.870E+03 -3.689E+02 -6.523E+01 0.000E+00 A18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0148] Figure 4 A to Figure 4C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the second embodiment.

[0149] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 4 When the wavelengths given in A are 850.0000nm, 610.0000nm, 587.5618nm, 546.0740nm, and 479.9914nm, respectively, the focus shifts of different fields of view are all within ±0.05mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0150] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the field angle. Figure 4 The astigmatism curve given in B shows that when the wavelength is 610.0000nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.05mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0151] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the field of view angle. Figure 4 The distortion curve given in C shows that the distortion is within ±80% when the wavelength is 610.0000 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0152] Embodiment three:

[0153] See also Figure 5 In the third embodiment, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has positive refractive power.

[0154] The object side surface S1 is a convex surface near the optical axis Z, and the image side surface S2 is a concave surface near the optical axis Z. The object side surface S3 is a convex surface near the optical axis Z, and the image side surface S4 is a concave surface near the optical axis Z. The object side surface S5 is a convex surface near the optical axis Z, and the image side surface S6 is a concave surface near the optical axis Z. The object side surface S7 is a convex surface near the optical axis Z, and the image side surface S8 is a convex surface near the optical axis Z. The object side surface S9 is a concave surface near the optical axis Z, and the image side surface S10 is a concave surface near the optical axis Z. The object side surface S11 is a convex surface near the optical axis Z, and the image side surface S12 is a convex surface near the optical axis Z.

[0155] The optical lens 10 meets the conditions of the following table:

[0156] Table 5

[0157]

[0158] In Table 5, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; the units of Y radius (curvature radius), thickness, and focal length are mm. The reference wavelength of the focal length is 632.8 nm; the reference wavelengths of the refractive index and the Abbe number are both 587.56 nm.

[0159] Table 6 below lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface (S3, S4, S5, S6, S7, S8, S9, S10, S11, S12) of the optical lens 10 of Example 3, and these coefficients are obtained by the above-mentioned aspherical surface formula (10).

[0160] Table 6

[0161] Surface number S3 S4 S5 S6 S7 K 0.000E+00 -1.729E+00 0.000E+00 0.000E+00 0.000E+00 A4 -1.481E-01 2.275E+00 1.592E-01 -1.281E+00 -1.887E+00 A6 -3.900E+00 -2.014E+01 -1.836E+00 6.419E+00 1.432E+01 A8 6.228E+00 5.905E+01 6.882E+00 -1.978E+01 -2.527E+02 A10 2.456E+00 -9.935E+01 -6.228E+01 8.486E+01 3.205E+03 A12 -2.173E+01 6.329E+01 2.108E+02 -3.172E+02 -2.330E+04 A14 2.842E+01 1.619E+02 -2.134E+02 6.905E+02 8.722E+04 A16 -1.316E+01 -2.709E+02 0.000E+00 0.000E+00 -1.293E+05 A18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 Surface number S8 S9 S10 S11 S12 K -6.310E-01 -4.033E-01 0.000E+00 -3.508E+00 0.000E+00 A4 -1.394E+00 -1.603E+00 -4.111E+00 -2.359E+00 7.363E-01 A6 1.676E+01 4.101E+01 3.980E+01 1.734E+01 -2.301E+00 A8 1.851E+01 -2.807E+02 -2.477E+02 -8.905E+01 3.554E+00 A10 -1.100E+03 1.378E+03 1.127E+03 3.133E+02 -1.923E+00 A12 6.350E+03 -7.284E+03 -3.473E+03 -6.899E+02 0.000E+00 A14 -1.678E+04 2.611E+04 6.154E+03 8.477E+02 0.000E+00 A16 2.060E+04 -3.768E+04 -4.650E+03 -4.429E+02 0.000E+00 A18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0162] Figure 6 A to Figure 6 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the third embodiment.

[0163] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 6 When the wavelengths given in A are 850.0000nm, 632.8000nm, 587.5618nm, 546.0740nm, and 479.9914nm, respectively, the focus shifts of different fields of view are all within ±0.05mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0164] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the field angle. Figure 6 The astigmatism curve given in B shows that when the wavelength is 632.8000nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.1mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0165] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the field of view angle. Figure 6 The distortion curve given in C indicates that the distortion is within ±80% when the wavelength is 632.8000 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0166] Embodiment 4:

[0167] See also Figure 7In Example 4, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has positive refractive power.

[0168] The object side surface S1 is a convex surface near the optical axis Z, and the image side surface S2 is a concave surface near the optical axis Z. The object side surface S3 is a convex surface near the optical axis Z, and the image side surface S4 is a concave surface near the optical axis Z. The object side surface S5 is a convex surface near the optical axis, and the image side surface S6 is a concave surface near the optical axis Z. The object side surface S7 is a convex surface near the optical axis Z, and the image side surface S8 is a convex surface near the optical axis Z. The object side surface S9 is a concave surface near the optical axis Z, and the image side surface S10 is a concave surface near the optical axis Z. The object side surface S11 is a convex surface near the optical axis Z, and the image side surface S12 is a convex surface near the optical axis Z.

[0169] The optical lens 10 meets the conditions of the following table:

[0170] Table 7

[0171]

[0172] In Table 7, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; the units of Y radius (curvature radius), thickness, and focal length are mm. The reference wavelength of the focal length is 632.8 nm; the reference wavelengths of the refractive index and the Abbe number are both 587.56 nm.

[0173] Table 8 below lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface (S3, S4, S5, S6, S7, S8, S9, S10, S11, S12) of the optical lens 10 of Example 4, and these coefficients are obtained by the above-mentioned aspherical surface formula (10).

[0174] Table 8

[0175]

[0176]

[0177] Figure 8 A to Figure 8 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the fourth embodiment.

[0178] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Figure 8When the wavelengths given in A are 865.0000nm, 850.0000nm, 835.0000nm, 632.8000nm, 610.1809nm, 587.5618nm, 546.0740nm, and 479.9914nm, respectively, the focus shifts of different fields of view are all within ±0.05mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0179] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the field angle. Figure 8 The astigmatism curve given in B shows that when the wavelength is 632.8000nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.1mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0180] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the field of view angle. Figure 8 The distortion curve given in C indicates that the distortion is within ±80% when the wavelength is 632.8000 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0181] Embodiment five:

[0182] See also Fig. 9 In Example 5, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has positive refractive power.

[0183] The object side surface S1 is a convex surface near the optical axis, and the image side surface S2 is a concave surface near the optical axis Z. The object side surface S3 is a convex surface near the optical axis Z, and the image side surface S4 is a concave surface near the optical axis Z. The object side surface S5 is a convex surface near the optical axis Z, and the image side surface S6 is a convex surface near the optical axis Z. The object side surface S7 is a convex surface near the optical axis Z, and the image side surface S8 is a convex surface near the optical axis Z. The object side surface S9 is a concave surface near the optical axis Z, and the image side surface S10 is a concave surface near the optical axis Z. The object side surface S11 is a convex surface near the optical axis Z, and the image side surface S12 is a concave surface near the optical axis Z.

[0184] The optical lens 10 meets the conditions of the following table:

[0185] Table 9

[0186]

[0187] In Table 9, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; the units of Y radius (curvature radius), thickness, and focal length are mm. The reference wavelength of the focal length is 632.8 nm, and the reference wavelengths of the refractive index and Abbe number are both 587.56 nm.

[0188] Table 10 below lists the cone coefficient K and the high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface (S3, S4, S5, S6, S7, S8, S9, S10, S11, S12) of the optical lens 10 of Example 5, and these coefficients are obtained by the surface shape formula (10) of the above-mentioned aspherical surface.

[0189] Table 10

[0190]

[0191]

[0192] Fig.10 A to Fig.10 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the fifth embodiment.

[0193] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Fig.10 When the wavelengths given in A are 865.0000nm, 850.0000nm, 835.0000nm, 632.8000nm, 610.1809nm, 587.5618nm, 546.0740nm, and 479.9914nm, respectively, the focus shifts of different fields of view are all within ±0.05mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0194] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the field angle. Fig.10 The astigmatism curve given in B shows that when the wavelength is 632.8000nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.1mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0195] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the field of view angle. Fig.10 The distortion curve given in C indicates that the distortion is within ±80% when the wavelength is 632.8000 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0196] Embodiment six:

[0197] See also Fig.11 In Example 5, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has positive refractive power.

[0198] The object side surface S1 is a convex surface near the optical axis Z, and the image side surface S2 is a concave surface near the optical axis Z. The object side surface S3 is a convex surface near the optical axis Z, and the image side surface S4 is a concave surface near the optical axis Z. The object side surface S5 is a convex surface near the optical axis Z, and the image side surface S6 is a concave surface near the optical axis Z. The object side surface S7 is a convex surface near the optical axis Z, and the image side surface S8 is a convex surface near the optical axis Z. The object side surface S9 is a concave surface near the optical axis Z, and the image side surface S10 is a concave surface near the optical axis Z. The object side surface S11 is a convex surface near the optical axis Z, and the image side surface S12 is a convex surface near the optical Z axis.

[0199] The optical lens 10 meets the conditions of the following table:

[0200] Table 11

[0201]

[0202]

[0203] In Table 11, f is the effective focal length of the optical lens 10; FNO is the aperture number of the optical lens 10; FOV is the maximum field angle of the optical lens 10; the units of Y radius (curvature radius), thickness, and focal length are mm. The reference wavelength of the focal length is 632.8 nm; the reference wavelengths of the refractive index and the Abbe number are both 587.56 nm.

[0204] Table 12 below lists the cone coefficient K and high-order correction coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface (S3, S4, S5, S6, S7, S8, S9, S10, S11, S12) of the optical lens 10 of Example 6, and these coefficients are obtained by the surface shape formula (10) of the above-mentioned aspherical surface.

[0205] Table 12

[0206]

[0207]

[0208] Fig.12 A to Fig.12 C are respectively the spherical aberration curve diagram, the astigmatism curve diagram and the distortion curve diagram in the sixth embodiment.

[0209] The horizontal axis of the spherical aberration curve represents the focus offset, and the vertical axis represents the normalized field of view. Fig.12When the wavelengths given in A are 865.0000nm, 850.0000nm, 835.0000nm, 632.8000nm, 610.1809nm, 587.5618nm, 546.0740nm, and 479.9914nm, respectively, the focus shifts of different fields of view are all within ±0.025mm, indicating that the spherical aberration of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0210] The horizontal axis of the astigmatism curve represents the focus shift, and the vertical axis represents the field angle. Fig.12 The astigmatism curve given in B shows that when the wavelength is 632.8000nm, the focus shifts of the sagittal image plane and the meridional image plane are both within ±0.1mm, indicating that the astigmatism of the optical lens 10 in this embodiment is small and the imaging quality is good.

[0211] The horizontal axis of the distortion curve represents the distortion rate, and the vertical axis represents the field of view angle. Fig.12 The distortion curve given in C indicates that the distortion is within ±80% when the wavelength is 632.8000 nm, which means that the distortion of the optical lens 10 in this embodiment is well corrected and the imaging quality is good.

[0212] For the above relationship (1) and relationship (2)-(9), the values ​​in Examples 1 to 6 are shown in Table 13 below.

[0213] Table 13

[0214]

[0215] See also Fig.13 The camera module 100 of the embodiment of the present invention includes an optical lens 10 and a photosensitive element 20. The photosensitive element 20 is arranged on the image side of the optical lens 10.

[0216] The photosensitive element 20 may be a complementary metal oxide semiconductor (CMOS) photosensitive element 20 or a charge-coupled device (CCD) photosensitive element 20 .

[0217] In the camera module 100 of the embodiment of the present invention, the value of 2, which is the product of the effective focal length of the optical lens 10 and the tangent value of half the maximum field of view angle, is controlled to be between 12.6 mm and 14.5 mm. This is beneficial for controlling the distortion of the entire optical lens 10, so that the distortion of the optical lens 10 is smaller, thereby improving the resolution of the optical lens 10, reducing the risk of distortion of images shot at larger angles, and improving the imaging quality of the optical lens 10.

[0218] See also Fig.14 The electronic device 1000 of the embodiment of the present invention includes a housing 200 and a camera module 100. The camera module 100 is installed in the housing 200. The electronic device 1000 of the embodiment of the present invention includes but is not limited to information terminal devices such as smart phones, mobile phones, personal digital assistants (PDAs), game consoles, personal computers (PCs), cameras, smart watches, tablet computers, monitoring equipment, or home appliances with camera functions.

[0219] In the electronic device 1000 of the embodiment of the present invention, the value of 2, which is the product of the effective focal length of the optical lens 10 and the tangent value of half the maximum field of view angle, is controlled to be between 12.6 mm and 14.5 mm. This is beneficial for controlling the distortion of the entire optical lens 10, so that the distortion of the optical lens 10 is smaller, thereby improving the resolution of the optical lens 10, reducing the risk of distortion of images shot at a larger angle, and improving the imaging quality of the optical lens 10.

[0220] See also Fig.15 The embodiment of the present invention further provides a vehicle 500, which includes a vehicle body 510 and the camera module 100 described above, wherein the camera module 100 is disposed on the vehicle body 510. The camera module 100 described above can obtain a wider viewing angle range and ensure that a high-quality image can be obtained through the camera module 100.

[0221] The vehicle 500 includes a fuel vehicle and an electric vehicle. The embodiment of the present invention does not limit the specific type of the vehicle 500. The camera module 100 can be installed at the front of the vehicle and / or the parking space, etc., so as to collect the environment image around the vehicle.

[0222] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0223] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one feature. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0224] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An optical lens, characterized in that: The optical lens comprises, from the object side to the image side, the following: a first lens having negative refractive power, wherein the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; a second lens having negative refractive power, wherein the object side surface of the second lens is convex near the optical axis; a third lens element having positive refractive power; a fourth lens having positive refractive power, wherein the object-side surface of the fourth lens is convex near the optical axis, and the image-side surface of the fourth lens is convex near the optical axis; a fifth lens having negative refractive power, wherein the object-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the fifth lens is concave near the optical axis; a sixth lens element having positive refractive power; The optical imaging system further comprises an aperture; The object side surface and image side surface of at least one lens of the optical lens are both plastic aspherical surfaces; The optical lens satisfies the following relationship: 12.6mm<2*f*tan(FOV / 2)<14.5mm, -3.4 <f5 / CT5≤-1.8; Among them, f is the effective focal length of the optical lens, FOV is the maximum field of view angle of the optical lens, f5 is the focal length of the fifth lens, and CT5 is the thickness of the fifth lens on the optical axis.

2. The optical lens according to claim 1, characterized in that: The Abbe number of at least one lens in the optical lens satisfies the following relationship: Vd<24.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.5 <Sagf2 / CT1<2.5; Wherein, Sagf2 is the sag height of the image side of the first lens at the maximum effective aperture, CT1 is Thickness on the optical axis.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: -7.7 <f2 / CT2<-4.2; Wherein, f2 is the focal length of the second lens, and CT2 is the thickness of the second lens on the optical axis.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 1.8 <f6 / CT6<3; Wherein, f6 is the focal length of the sixth lens, and CT6 is the thickness of the sixth lens on the optical axis.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 4mm 2 <(f1*f2*f3) / f<7.5mm 2 ; Among them, f1, f2, f3 are the focal lengths of the first lens, the second lens and the third lens respectively, and f is the effective focal length of the optical lens.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 2.1 <f45 / f<4.7; Wherein, f45 is the combined focal length of the fourth lens and the fifth lens, and f is the effective focal length of the optical lens.

8. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 6.1 <TTL / f<7.2; Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, and f is the effective focal length of the optical lens.

9. A camera module, characterized in that: The camera module comprises: The optical lens according to any one of claims 1 to 8; and A photosensitive element is arranged on the image side of the optical lens.

10. An electronic device, characterized in that: include: case; and The camera module described in claim 9 is mounted on the housing.

11. A vehicle, characterized in that: include: Vehicle body; and The camera module described in claim 9 is arranged on the vehicle body.

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