Optical imaging lenses, imaging modules, electronic equipment and driving devices

Abstract

The present application relates to an optical imaging lens, an imaging module, an electronic device, and a driving device. The optical imaging lens comprises, in order from the object side to the image side along the optical axis, a first lens having negative refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having positive refractive power, and a sixth lens having refractive power. By grouping the lenses within the optical imaging lens and rationally configuring the number, refractive power, and surface shape of the lenses in the first, second, and third lens groups, the above-mentioned optical imaging lens improves its imaging resolution, enabling it to effectively capture detailed features of a subject at a distance, achieve high-quality imaging, and enhance image clarity.

Description

Technical Field

[0001] The present application relates to the field of optical imaging technology, and in particular to an optical imaging lens, an imaging module, an electronic device, and a driving device. Background Art

[0002] With the continuous development of various driving devices and technologies, such as assisted driving, autonomous driving, and unmanned driving, people's demand for driving safety has gradually increased, and the use of in-vehicle cameras has become increasingly popular. The function of in-vehicle cameras varies depending on their installation location. In order for the in-vehicle system to grasp the road conditions ahead in real time and provide a guarantee for safe driving, the forward-facing lens in the in-vehicle camera must have high imaging clarity, so that the in-vehicle system can predict and analyze road conditions in advance.

[0003] When existing front-view lenses capture and observe distant objects, it is difficult to ensure overall pixel quality and clarity. Therefore, there is an urgent need for a front-view lens that can have high clarity under normal conditions. Summary of the Invention

[0004] Based on this, it is necessary to provide an optical imaging lens, an imaging module, an electronic device and a driving device in order to improve the imaging clarity of the lens.

[0005] In a first aspect, an embodiment of the present application provides an optical imaging lens, which includes, in order from the object side to the image side of the optical axis: a first lens group, which includes, in order from the object side to the image side of the optical axis, a first lens and a second lens, the first lens having negative refractive power, the object-side surface and the image-side surface of the first lens being concave at the near optical axis, and the second lens having positive refractive power; a second lens group, which includes, in order from the object side to the image side of the optical axis, a third lens, a fourth lens, and a fifth lens, the third lens having negative refractive power, the object-side surface and the image-side surface of the third lens being concave at the near optical axis, the fourth lens having positive refractive power, the object-side surface and the image-side surface of the fourth lens being convex at the near optical axis, and the fifth lens having positive refractive power; and a third lens group, which includes a sixth lens, which has refractive power, and the object-side surface of the sixth lens being convex at the near optical axis.

[0006] Based on the optical imaging lens in the embodiment of the present application, by grouping the lenses in the optical imaging lens and rationally configuring the number, refractive power, and surface shape of the lenses in the first lens group, the second lens group, and the third lens group, it is beneficial to eliminate the aberrations of the optical imaging lens, achieve mutual correction of the aberrations between the lenses, and improve the imaging resolution of the optical imaging lens, enabling it to effectively capture the detailed features of the subject at a long distance, obtain high-quality images, and improve image clarity.

[0007] In one embodiment, the third lens group further includes a seventh lens. The seventh lens is located on the image side of the sixth lens along the optical axis. The seventh lens has a negative refractive power. Both the object side surface and the image side surface of the seventh lens are concave surfaces near the optical axis.

[0008] Based on the above embodiment, by adding the seventh lens in the third lens group, the aberration generated inside the optical imaging lens can be further corrected, the imaging resolution of the overall optical imaging lens can be improved, which is beneficial to improving the imaging clarity.

[0009] In one embodiment, the sixth lens and the seventh lens are cemented together.

[0010] Based on the above embodiment, cementing the sixth lens and the seventh lens in the third lens group can not only effectively reduce the assembly sensitivity of the optical imaging lens and shorten the overall length of the optical imaging lens, but also share the overall chromatic aberration of the optical imaging lens, which is beneficial to better correcting the chromatic aberration and further improving the imaging quality of the optical imaging lens.

[0011] In one embodiment, the third lens and the fourth lens are cemented together.

[0012] Based on the above embodiment, cementing the third lens and the fourth lens in the second lens group can not only further reduce the assembly sensitivity of the optical imaging lens and shorten the overall length of the optical imaging lens, but also further share the overall chromatic aberration of the optical imaging lens, which is beneficial to further correcting the chromatic aberration and further improving the imaging quality of the optical imaging lens.

[0013] In one embodiment, the optical imaging lens satisfies the following relationship: 1.5 < f12 / f < 2.5; where f12 is the combined focal length of the first lens group, and f is the effective focal length of the optical imaging lens.

[0014] Based on the above embodiments, by designing the relationship between the combined focal length f12 of the first lens group in the optical imaging lens and the effective focal length f of the optical imaging lens to satisfy the conditional formula: 1.5 < f12 / f < 2.5, in this way, the focal length of the first lens group is controlled within a reasonable range, which can avoid the excessive converging ability of the first lens group. On the one hand, it is beneficial to compress the field angle of the optical imaging lens to endow it with telephoto characteristics; on the other hand, it can also prevent the incident light beam from being greatly deflected, which is conducive to preventing the first lens group from generating large aberrations and ensuring that the field range of the optical imaging lens meets the usage requirements. At the same time, the first lens provides negative refractive power for the optical imaging lens, and the second lens provides positive refractive power for the optical imaging lens. The combination of positive and negative lenses can cancel out the aberrations generated by each other, improving the imaging resolution of the optical imaging lens and thus obtaining high-quality imaging. When the relationship between these two parameters does not satisfy the above conditional formula, it is difficult to balance the viewing range and imaging quality of the optical imaging lens and cannot well meet the usage requirements.

[0015] In one of the embodiments, the optical imaging lens satisfies the following relational formula: 8 < Rs1 / Sags1 < 10.5; where, Rs1 is the curvature radius of the object side of the first lens at the optical axis, and Sags1 is the sagitta of the object side of the first lens at the maximum effective aperture.

[0016] Based on the above embodiments, by designing the relationship between the curvature radius Rs1 of the object side of the first lens in the optical imaging lens at the optical axis and the sagitta Sags1 of the object side of the first lens at the maximum effective aperture to satisfy the conditional formula: 8 < Rs1 / Sags1 < 10.5, since the object side of the first lens is concave near the optical axis, the more curved the concave surface is, the more conducive it is to the contraction of the object-side light beam, and the light beam is refracted by the subsequent lens group and focused on the imaging surface, thereby realizing small-field-angle imaging and achieving the telephoto effect. By satisfying the relational conditional formula, it is beneficial to ensure the refractive power intensity of the first lens while avoiding the excessive bending of the object side of the first lens, which increases the processing difficulty of the lens. If it exceeds the upper limit of the relational formula, there will be a phenomenon of insufficient refractive power intensity of the first lens and insufficient aberration correction; conversely, if it exceeds the lower limit of the relational formula, the object side of the first lens is too curved, increasing the processing difficulty of the lens and resulting in problems such as lens breakage easily occurring during the forming process of the surface type process.

[0017] In one of the embodiments, the optical imaging lens satisfies the following relational formula: -16.5 < f34 / (CT4 - CT3) < -10; where, f34 is the combined focal length of the third lens and the fourth lens, CT4 is the thickness of the fourth lens on the optical axis, and CT3 is the thickness of the third lens on the optical axis.

[0018] Based on the above embodiments, by designing the relationship between the combined focal length f34 of the third lens and the fourth lens in the optical imaging lens, the thickness CT4 of the fourth lens on the optical axis, and the thickness CT3 of the third lens on the optical axis to satisfy the conditional formula: -16.5 < f34 / (CT4 - CT3) < -10, in this way, the thickness relationship between the third lens and the fourth lens is reasonably matched, so that the above two lenses with positive and negative refractive powers can be reasonably matched, thereby mutually correcting aberrations, which is beneficial to reducing the aberration contribution ratio provided by the third lens and the fourth lens to the optical imaging lens. If it exceeds the range of the conditional formula, the difference in the central thickness between the third lens and the fourth lens is too large, which is not conducive to the gluing process. And in an environment with large temperature changes between high and low temperatures, due to the large difference in the amount of thermal and cold deformation caused by the thickness difference, phenomena such as glue cracking or delamination are likely to occur. At the same time, if the combined focal length of the third lens and the fourth lens is too large, serious astigmatism phenomena are likely to occur, which is not conducive to improving the imaging quality.

[0019] In one of the embodiments, the optical imaging lens satisfies the following relational formula: 1 < f35 / f < 3; where f35 is the combined focal length of the second lens group, and f is the effective focal length of the optical imaging lens.

[0020] Based on the above embodiments, by designing the relationship between the combined focal length f35 of the second lens group in the optical imaging lens and the effective focal length f of the optical imaging lens to satisfy the conditional formula: 1 < f35 / f < 3, in this way, the refractive power distribution of the second lens group in the optical imaging lens is reasonably controlled. On the one hand, it is beneficial to control the exit light angle of the light beam when it exits the second lens group, thereby reducing the light angle of the marginal field beam entering the subsequent lens group, so as to reduce the high-order aberrations in the optical imaging lens and the outer diameter of the subsequent lens group. On the other hand, it can correct the field curvature generated by the first lens group, thereby reducing the influence on the imaging resolution of the optical imaging lens.

[0021] In one of the embodiments, the optical imaging lens satisfies the following relational formula: |f67| / f > 5; where |f67| is the absolute value of the combined focal length of the third lens group, and f is the effective focal length of the optical imaging lens.

[0022] Based on the above embodiment, by designing the relationship between the absolute value of the combined focal length |f67| of the third lens group in the optical imaging lens and the effective focal length f of the optical imaging lens to satisfy the conditional expression: |f67| / f>5, the third lens group in the optical imaging lens has sufficient refractive power, which helps reduce the angle of light beams emitted from the optical imaging lens after being refracted by the first and second lens groups through the third lens group. This, in turn, reduces the angle of incidence of light beams entering the image-side photosensitive element of the optical imaging lens, improving the photosensitivity of the photosensitive element and thus enhancing the imaging quality of the optical imaging lens. Furthermore, this helps lengthen the back focus of the optical imaging lens, providing sufficient assembly space for the lenses, reducing assembly sensitivity, and thus facilitating assembly of the optical imaging lens. In some embodiments, by cementing the sixth lens and the seventh lens together, chromatic aberration of the optical imaging lens is corrected, thereby improving the imaging resolution of the optical imaging lens.

[0023] In one embodiment, the optical imaging lens satisfies the following relationship: 2*Imgh / EPD<1; wherein Imgh is half of the image height corresponding to the maximum field angle of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

[0024] Based on the above embodiment, the relationship between the maximum field of view angle (Imgh), corresponding to half the image height, and the entrance pupil diameter (EPD) of the optical imaging lens is designed to satisfy the conditional expression: 2*Imgh / EPD<1. This allows the optical imaging lens to achieve a large image plane and a large aperture while also ensuring sufficient image brightness in the peripheral fields of view, preventing vignetting and thereby improving imaging quality. However, if the upper limit of the relationship is exceeded, the entrance pupil diameter becomes smaller, which is not conducive to a large aperture design for the optical imaging lens, resulting in reduced light throughput and an improvement in image brightness. Conversely, if the lower limit is exceeded, the entrance pupil diameter becomes larger, making it difficult for light from each field of view to converge on the imaging plane, resulting in an excessively curved image on the imaging plane and increased astigmatism. The astigmatism problem becomes more pronounced in the peripheral fields of view, thus hindering the improvement of the imaging resolution of the optical imaging lens.

[0025] In one embodiment, the optical imaging lens satisfies the following relationship: FNO≤1.6; wherein FNO is the aperture number of the optical imaging lens.

[0026] Based on the above embodiment, by designing the aperture number FNO of the optical imaging lens to satisfy the condition: FNO≤1.6, the amount of light passing through the optical imaging lens is limited, thereby achieving a large aperture, which helps to improve imaging quality and enable the optical imaging lens to have a large depth of field, which is conducive to bringing distant objects closer and enabling the vehicle system to predict and analyze road conditions in advance.

[0027] In one embodiment, the optical imaging lens satisfies the following relational expression: 2 < EPL / DOS < 3; where EPL is the distance from the aperture stop to the imaging surface of the optical imaging lens on the optical axis, and DOS is the distance from the object side surface of the first lens to the aperture stop on the optical axis.

[0028] Based on the above embodiment, by designing the relationship between the distance EPL from the aperture stop to the imaging surface of the optical imaging lens on the optical axis and the distance DOS from the object side surface of the first lens to the aperture stop on the optical axis in the optical imaging lens to satisfy the conditional expression: 2 < EPL / DOS < 3, in this way, the light rays will exit to the imaging surface at an angle close to perpendicular, so that the optical imaging lens has a telecentric characteristic, which can improve the photosensitivity of the photosensitive element.

[0029] In a second aspect, an embodiment of the present application provides an imaging module, including an optical imaging lens as in any one of the above embodiments; a photosensitive element disposed on the image side of the optical imaging lens.

[0030] Based on the imaging module in the embodiment of the present application, since the above optical imaging lens is adopted, by grouping the lenses in the optical imaging lens and reasonably configuring the number, refractive power, and their surface shapes of the lenses in the first lens group, the second lens group, and the third lens group, it is beneficial to eliminate the aberration of the optical imaging lens, realize the mutual correction of the aberrations between the lenses, improve the imaging resolution of the optical imaging lens, enable it to capture the detailed features of the photographed object well at a long distance, obtain high-quality imaging, and improve the imaging clarity.

[0031] In a third aspect, an embodiment of the present application provides an electronic device, which includes: a housing; an imaging module as described above, disposed on the housing.

[0032] Based on the electronic device in the embodiment of the present application, since the above imaging module is adopted, by grouping the lenses in the imaging module and reasonably configuring the number, refractive power, and their surface shapes of the lenses in the first lens group, the second lens group, and the third lens group, it is beneficial to eliminate the aberration of the imaging module, realize the mutual correction of the aberrations between the lenses, improve the imaging resolution of the imaging module, enable it to capture the detailed features of the photographed object well at a long distance, obtain high-quality imaging, and improve the imaging clarity.

[0033] In a fourth aspect, an embodiment of the present application provides a driving device, which includes: a vehicle body; an electronic device as described above, disposed on the vehicle body to obtain environmental information around the vehicle body.

[0034] Based on the driving device in the embodiment of the present application, since the above-mentioned electronic device is adopted, by grouping the lenses in the electronic device and reasonably configuring the number, refractive power and surface shape of the lenses in the first lens group, the second lens group and the third lens group, it is beneficial to eliminate the aberration of the imaging module, realize the mutual correction of the aberration between the lenses, and improve the imaging resolution of the imaging module, so that it can well capture the detailed features of the subject at a long distance, obtain high-quality imaging, and improve imaging clarity.

[0035] Based on the optical imaging lens, imaging module, electronic device, and driving device in the embodiments of the present application, by grouping the lenses and rationally configuring the number, refractive power, and surface shape of the lenses in the first lens group, the second lens group, and the third lens group, it is beneficial to eliminate the aberrations of the optical imaging lens, achieve mutual correction of the aberrations between the lenses, and improve the imaging resolution of the optical imaging lens, enabling it to well capture the detailed features of the subject at a long distance, obtain high-quality images, and improve image clarity. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic structural diagram of the optical imaging lens provided in Example 1 of the present application;

[0037] Figure 2 The spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical imaging lens provided in Example 1 of the present application;

[0038] Figure 3 A schematic structural diagram of the optical imaging lens provided in Example 2 of the present application;

[0039] Figure 4 The spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical imaging lens provided in Example 2 of the present application;

[0040] Figure 5 A schematic structural diagram of the optical imaging lens provided in Example 3 of the present application;

[0041] Figure 6 The spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical imaging lens provided in Example 3 of the present application;

[0042] Figure 7 A schematic structural diagram of the optical imaging lens provided in Example 4 of the present application;

[0043] Figure 8 The spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical imaging lens provided in Example 4 of the present application;

[0044] Figure 9 A schematic structural diagram of the optical imaging lens provided in Example 5 of the present application;

[0045] Figure 10The spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical imaging lens provided in Example 5 of the present application;

[0046] Figure 11 A schematic diagram of an imaging module provided in one embodiment of the present application;

[0047] Figure 12 A schematic diagram of an electronic device provided in one embodiment of the present application;

[0048] Figure 13 A schematic diagram of a driving device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0049] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0050] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0051] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0052] In this specification, terms such as first, second, and third are used solely to distinguish one feature from another and do not limit the features. Therefore, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application. For ease of explanation, the shapes of spherical or aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0053] In this specification, the side of an optical element where an object is located is referred to as the object side of the optical element. Correspondingly, the side of the optical element where the image of the object is located is referred to as the image side of the optical element. The surface of each lens closest to the object is called the object side, and the surface of each lens closest to the imaging plane is called the image side. The distance from the object side to the image side is defined as the positive direction.

[0054] In the following description, if a lens surface is convex and the location of the convex surface is not specified, it means that the lens surface is convex at least at the near optical axis; if a lens surface is concave and the location of the concave surface is not specified, it means that the lens surface is concave at least at the near optical axis. Here, the near optical axis refers to the area near the optical axis.

[0055] The following first explains the aberrations involved in the embodiments of the present application; aberration refers to the inconsistency between the results obtained by non-paraxial ray tracing and the results obtained by paraxial ray tracing in an optical system, and the deviation from the ideal condition of Gaussian optics (first-order approximation theory or paraxial rays). Aberrations are divided into two categories: chromatic aberration and monochromatic aberration. Chromatic aberration is caused by the refractive index of the lens material being a function of the wavelength. When light of different wavelengths passes through the lens, the aberration is caused by the different refractive indices. Chromatic aberration can be divided into positional chromatic aberration and magnification chromatic aberration. Chromatic aberration is a dispersion phenomenon. The so-called dispersion phenomenon refers to the phenomenon that the speed of light or the refractive index in the medium changes with the wavelength of the light wave. The dispersion in which the refractive index of light decreases with the increase of wavelength can be called normal dispersion, and the dispersion in which the refractive index increases with the increase of wavelength can be called negative dispersion (or negative anomalous dispersion). Monochromatic aberrations occur even with highly monochromatic light. Based on their effects, they are categorized as blurring the image and distorting it. The former includes spherical aberration (also known as spherical aberration and astigmatism), while the latter includes field curvature (also known as field curvature and distortion). Coma also includes coma, which occurs when a monochromatic conical beam of light emanating from an off-axis object point toward an optical system, after refraction through the system, fails to converge into a sharp point on an ideal plane, but instead forms a comet-shaped spot with a bright tail.

[0056] Please also refer to Figure 1 、 Figure 3 、 Figure 5 、 Figure 7 and Figure 9The present invention provides an optical imaging lens 100 with high imaging clarity. The optical imaging lens 100 includes, in order from the object side to the image side along an optical axis 110, a first lens group, a second lens group, and a third lens group. Each of the first lens group, the second lens group, and the third lens group includes at least one lens.

[0057] The first lens group includes, from the object side to the image side along the optical axis 110, a first lens L1 and a second lens L2. The first lens L1 has negative refractive power, and the object-side surface S1 and the image-side surface S2 of the first lens L1 are both concave near the optical axis 110. The second lens L2 has positive refractive power, and the object-side surface S3 and the image-side surface S4 of the second lens L2 can be concave, flat, or convex near the optical axis 110.

[0058] The second lens group includes, from the object side to the image side along the optical axis 110, a third lens L3, a fourth lens L4 and a fifth lens L5. The third lens L3 has negative refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens L3 are concave near the optical axis 110. The fourth lens L4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are convex near the optical axis 110. The fifth lens L5 has positive refractive power, and the object-side surface S9 and the image-side surface S10 of the fifth lens L5 can be concave, flat, or convex near the optical axis 110.

[0059] The third lens group includes a sixth lens L6, which has refractive power. The object-side surface S11 of the sixth lens L6 is convex near the optical axis 110. At least one lens in the first lens group and the second lens group has an aspherical surface on both the object-side surface and the image-side surface near the optical axis 110.

[0060] The optical imaging lens 100 may further include an aperture STO, which is disposed between two adjacent lenses in the optical imaging lens 100. The aperture STO can reduce stray light in the optical imaging lens 100 to improve imaging quality. The aperture STO may be an aperture aperture and / or a field aperture. The aperture STO is disposed between two adjacent lenses in the optical imaging lens 100. For example, the aperture STO may be located between the object plane of the optical imaging lens 100 and the object-side surface S1 of the first lens L1, between the image-side surface S2 of the first lens L1 and the object-side surface S3 of the second lens L2, between the image-side surface S4 of the second lens L2 and the object-side surface S5 of the third lens L3, etc. To save costs, the aperture STO may also be disposed on the object-side surface or the image-side surface of any lens. In this embodiment, the aperture STO is arranged between the image-side surface S4 of the second lens element L2 and the object-side surface S5 of the third lens element L3. By arranging the aperture STO in the middle of the optical imaging lens 100, it is possible for the optical imaging lens 100 to have a larger field of view, thereby effectively improving the image framing range.

[0061] Based on the above embodiment, the lenses in the optical imaging lens 100 are grouped, and the number, refractive power, and surface shape of the lenses in the first lens group, the second lens group, and the third lens group are rationally configured. This helps eliminate aberrations in the optical imaging lens 100, achieves mutual correction of aberrations between the lenses, and improves the imaging resolution of the optical imaging lens 100, enabling it to effectively capture detailed features of subjects at a distance, obtain high-quality images, and enhance image clarity.

[0062] Each lens can be made of a light-transmitting optical material. To reduce the cost of the optical imaging lens 100, each lens in the first lens group, the second lens group, and the third lens group can be made of plastic. The imaging quality of the optical imaging lens 100 is not only related to the coordination between the lenses within the lens, but also closely related to the materials used for each lens. Therefore, to improve the imaging quality of the optical imaging lens 100, each lens in the first lens group, the second lens group, and the third lens group can also be partially or entirely made of glass.

[0063] In some embodiments, the third lens group further includes a seventh lens element L7, which is located on the image side of the sixth lens element L6 along the optical axis 110. The seventh lens element L7 has negative refractive power, and both the object-side surface S13 and the image-side surface 14 of the seventh lens element L7 near the optical axis 110 are concave. The sixth lens element L6 and the seventh lens element L7 can be integrated into a single optical element, reducing production costs. The sixth lens element L6 and the seventh lens element L7 can also be cemented together to better correct chromatic aberration. Based on the above embodiment, the addition of the seventh lens element L7 to the third lens group can further correct aberrations generated within the optical imaging lens 100, improving the overall imaging resolution of the optical imaging lens 100 and enhancing image clarity.

[0064] As known to those skilled in the art, discrete lenses at the intersection of light rays are susceptible to sensitivity due to manufacturing errors and / or assembly errors. The use of cemented lenses can effectively reduce lens assembly sensitivity. Therefore, in this embodiment, the sixth lens L6 is cemented with the seventh lens L7. Based on the above embodiment, cementing the sixth lens L6 and the seventh lens L7 in the third lens group not only effectively reduces the assembly sensitivity of the optical imaging lens 100 and shortens the overall length of the optical imaging lens 100, but also reduces the overall chromatic aberration of the optical imaging lens 100, facilitating better correction of chromatic aberration and further improving the imaging quality of the optical imaging lens 100.

[0065] In one embodiment, the third lens L3 and the fourth lens L4 are cemented together. Cementing the third lens L3 and the fourth lens L4 in the second lens group can not only further reduce the assembly sensitivity of the optical imaging lens 100 and shorten the overall length of the optical imaging lens 100, but also further share the overall chromatic aberration of the optical imaging lens 100, which is beneficial to further correcting chromatic aberration and further improving the imaging quality of the optical imaging lens 100.

[0066] In one embodiment, the optical imaging lens 100 satisfies the following relationship: 1.5 < f12 / f < 2.5; where f12 is the combined focal length of the first lens group, and f is the effective focal length of the optical imaging lens 100. Based on the above embodiment, by designing the relationship between the combined focal length f12 of the first lens group in the optical imaging lens 100 and the effective focal length f of the optical imaging lens 100 to satisfy the conditional expression: 1.5 < f12 / f < 2.5, in this way, the focal length of the first lens group is controlled within a reasonable range, which can avoid the converging ability of the first lens group being too strong. On the one hand, it is beneficial to compress the field angle of the optical imaging lens 100 to give it a telephoto characteristic; on the other hand, it can also prevent the incident light beam from being greatly deflected, which is beneficial to preventing the first lens group from generating a large amount of aberration and ensuring that the field range of the optical imaging lens 100 meets the usage requirements. At the same time, the first lens L1 provides negative refractive power for the optical imaging lens 100, and the second lens L2 provides positive refractive power for the optical imaging lens 100. The positive and negative lens combination can cancel each other's generated aberration, improve the imaging resolution of the optical imaging lens 100, and thus obtain high-quality imaging. f12 / f can be any value within the range of (1.5, 2.5), for example, the values can be 1.52, 1.60, 1.75, 1.82, 1.94, 2.07, 2.13, 2.49, etc.

[0067] In one embodiment, the optical imaging lens 100 satisfies the following relational expression: 8 < Rs1 / Sags1 < 10.5; where Rs1 is the radius of curvature of the object side surface S1 of the first lens L1 at the optical axis 110, and Sags1 is the sagitta of the object side surface S1 of the first lens L1 at the maximum effective aperture. Based on the above embodiment, by designing the relationship between the radius of curvature Rs1 of the object side surface S1 of the first lens L1 in the optical imaging lens 100 at the optical axis 110 and the sagitta Sags1 of the object side surface S1 of the first lens L1 at the maximum effective aperture to satisfy the conditional expression: 8 < Rs1 / Sags1 < 10.5, since the object side surface S1 of the first lens L1 is concave near the optical axis 110, the more curved the concave surface is, the more conducive it is to the contraction of the object-side light beam, and the light beam is refracted by the subsequent lens group and focused on the imaging surface S19, thereby achieving small-field-angle imaging and achieving a telephoto effect. By satisfying the relational conditional expression, it is beneficial to ensure the refractive power intensity of the first lens L1 while avoiding excessive bending of the object side surface S1 of the first lens L1, which increases the processing difficulty of the lens. If it exceeds the upper limit of the relational expression, there will be a phenomenon of insufficient refractive power intensity of the first lens L1 and insufficient aberration correction; conversely, if it exceeds the lower limit of the relational expression, the object side surface S1 of the first lens L1 is too curved, increasing the processing difficulty of the lens and resulting in problems such as lens breakage during the surface shaping process. Rs1 / Sags1 can be any value within the range of (8, 10.5), such as 8.01, 8.57, 8.69, 9.11, 9.28, 9.90, 10.12, 10.49, etc.

[0068] In one embodiment, the optical imaging lens 100 satisfies the following relational expression: -16.5 < f34 / (CT4 - CT3) < -10; where f34 is the combined focal length of the third lens L3 and the fourth lens L4, CT4 is the thickness of the fourth lens L4 on the optical axis 110, and CT3 is the thickness of the third lens L3 on the optical axis 110. Based on the above embodiment, by designing the relationship between the combined focal length f34 of the third lens L3 and the fourth lens L4 in the optical imaging lens 100, the thickness CT4 of the fourth lens L4 on the optical axis 110, and the thickness CT3 of the third lens L3 on the optical axis 110 to satisfy the conditional expression: -16.5 < f34 / (CT4 - CT3) < -10, in this way, the thickness relationship between the third lens L3 and the fourth lens L4 is reasonably matched, so that the above two lenses with positive and negative refractive powers can be reasonably matched, thereby performing mutual correction of aberrations, which is beneficial for the third lens L3 and the fourth lens L4 to provide the smallest aberration contribution ratio for the optical imaging lens 100. If it exceeds the range of the conditional expression, the difference in the central thickness between the third lens L3 and the fourth lens L4 is too large, which is not conducive to the gluing process. And in an environment with a large temperature change between high and low temperatures, the difference in the amount of thermal and cold deformation due to the thickness difference is large, and phenomena such as glue cracking or delamination are likely to occur. At the same time, if the combined focal length of the third lens L3 and the fourth lens L4 is too large, serious astigmatism is likely to occur, which is not conducive to improving the imaging quality. f34 / (CT4 - CT3) can be any value within the range of (-16.5, -10), such as -16.49, -16.26, -16.13, -16.00, -15.78, -14.33, -13.14, -12.55, -10.01, etc.

[0069] In one embodiment, the optical imaging lens 100 satisfies the following relational expression: 1 < f35 / f < 3; where f35 is the combined focal length of the second lens group, and f is the effective focal length of the optical imaging lens 100. Based on the above embodiment, by designing the relationship between the combined focal length f35 of the second lens group in the optical imaging lens 100 and the effective focal length f of the optical imaging lens 100 to satisfy the conditional expression: 1 < f35 / f < 3, in this way, the distribution of the optical power of the second lens group is reasonably controlled. On the one hand, it is beneficial to control the exit light angle of the light beam when it exits the second lens group, thereby reducing the light angle of the marginal field beam entering the subsequent lens group, so as to reduce the high-order aberrations in the optical imaging lens 100 and the outer diameter of the subsequent lens group; on the other hand, it can correct the field curvature generated by the first lens group, thereby reducing the influence on the imaging resolution of the optical imaging lens 100. f35 / f can be any value within the range of (1, 3), such as 1.01, 1.56, 1.78, 2.05, 2.17, 2.68, 2.99, etc.

[0070] In one embodiment, the optical imaging lens 100 satisfies the following relationship: |f67| / f>5, where |f67| is the absolute value of the combined focal length of the third lens group, and f is the effective focal length of the optical imaging lens 100. Based on the above embodiment, by designing the relationship between the absolute value of the combined focal length of the third lens group in the optical imaging lens 100, |f67|, and the effective focal length f of the optical imaging lens 100 to satisfy the conditional equation: |f67| / f>5, the third lens group in the optical imaging lens 100 has sufficient refractive power, which helps reduce the angle of light beams emitted from the optical imaging lens 100 after being refracted by the first and second lens groups and then emitted through the third lens group. This, in turn, reduces the angle of incidence of light beams entering the image-side photosensitive element of the optical imaging lens 100, improves the photosensitivity of the photosensitive element, and thus enhances the imaging quality of the optical imaging lens 100. Furthermore, this helps extend the back focus of the optical imaging lens 100, providing sufficient assembly space for the lens, reducing assembly sensitivity, and facilitating assembly of the optical imaging lens 100. |f67| / f can be any value greater than 5, for example, 5.20, 5.64, 6.78, 7.15, 8.66, 9.73, 10.20, 15.97, etc.

[0071] In one embodiment, the optical imaging lens 100 satisfies the following relationship: 2*Imgh / EPD<1; where Imgh is half the image height corresponding to the maximum field of view of the optical imaging lens 100, and EPD is the entrance pupil diameter of the optical imaging lens 100. Based on the above embodiment, by designing the relationship between Imgh, half the image height corresponding to the maximum field of view of the optical imaging lens 100, and the entrance pupil diameter EPD of the optical imaging lens 100 to satisfy the conditional formula: 2*Imgh / EPD<1, the optical imaging lens 100 can achieve a large image area and a large aperture while also ensuring sufficient image brightness in the peripheral field of view, preventing vignetting and thereby improving imaging quality. If the upper limit of the relationship is exceeded, the entrance pupil diameter is small, which is not conducive to a large aperture design of the optical imaging lens 100, resulting in reduced light transmission through the optical imaging lens 100 and hindering improved image brightness within the optical imaging lens 100. Conversely, if the lower limit is exceeded, the entrance pupil diameter is large, making it difficult for light from various fields of view to converge on the imaging plane S19. This results in an excessively curved image on the imaging plane S19, increased astigmatism, and more pronounced astigmatism at the edges of the field of view, hindering improved imaging resolution of the optical imaging lens 100. 2*Imgh / EPD can be any value less than 1, such as 0.01, 0.28, 0.36, 0.45, 0.77, 0.81, 0.99, and the like.

[0072] In one embodiment, the optical imaging lens 100 satisfies the following relationship: FNO ≤ 1.6; where FNO is the aperture number of the optical imaging lens 100. Based on the above embodiment, by designing the aperture number FNO of the optical imaging lens 100 to satisfy the conditional expression: FNO ≤ 1.6, in this way, the light passing through the optical imaging lens 100 is limited, so that a large aperture can be achieved, which helps to improve the imaging quality, makes the optical imaging lens 100 have the characteristic of large depth of field, is conducive to bringing distant objects closer, and enables the vehicle-mounted system to predict and analyze the road conditions in advance. FNO can be any value less than or equal to 1.6, such as 1.03, 1.11, 1.29, 1.34, 1.46, 1.58, 1.60, etc.

[0073] In one embodiment, the optical imaging lens 100 satisfies the following relationship: 2 < EPL / DOS < 3; where EPL is the distance from the aperture stop STO to the imaging surface S19 of the optical imaging lens 100 on the optical axis 110, and DOS is the distance from the object side surface S1 of the first lens L1 to the aperture stop STO on the optical axis 110. Based on the above embodiment, by designing the relationship between the distance EPL from the aperture stop STO to the imaging surface S19 of the optical imaging lens 100 on the optical axis 110 and the distance DOS from the object side surface S1 of the first lens L1 to the aperture stop STO on the optical axis 110 to satisfy the conditional expression: 2 < EPL / DOS < 3, in this way, the light rays will be emitted to the imaging surface S19 at an angle close to perpendicular, so that the optical imaging lens 100 has a telecentric characteristic, which can improve the photosensitivity of the photosensitive element. EPL / DOS can be any value within the range of (2, 3), such as 2.01, 2.13, 2.22, 2.35, 2.47, 2.80, 2.99, etc.

[0074] Light emitted or reflected from the object being photographed passes sequentially from the object side through the first, second, and third lens groups of the optical imaging lens 100 before reaching the image side and forming an image on the image-side imaging surface S19. To ensure the clarity of the image of the object on the image-side imaging surface S19, the optical imaging lens 100 may further include an infrared filter 120, which may be positioned between the image-side surface of the third lens group and the image side of the optical imaging lens 100. By including the infrared filter 120 in the optical imaging lens 100, light passing through the infrared filter 120 after passing through the third lens group effectively filters infrared rays from the light, thereby ensuring clarity in the image of the object being photographed. Furthermore, the optical imaging lens 100 may further include a protective glass 130, positioned on the image side of the infrared filter 120 to protect the photosensitive element and prevent dust from contaminating the photosensitive element, further ensuring image quality. It should be noted that in a vehicle-mounted system, since each lens in the optical imaging lens 100 is preferably made of glass, in other embodiments, in order to reduce the weight of the optical imaging lens 100 or reduce the overall length of the lens, the protective glass 130 may be omitted. This application does not impose any restrictions on this.

[0075] The optical imaging lens 100 of the above-described embodiment of the present application can utilize multiple lenses, such as the six or seven lenses described above. By properly allocating the focal length, refractive power, surface shape, thickness, and on-axis spacing between the lenses, aberrations within the optical imaging lens 100 can be eliminated, aberrations between the lenses can be mutually corrected, and the imaging resolution of the optical imaging lens 100 can be improved. This allows the lens to capture detailed features of subjects at long distances, resulting in high-quality images and enhanced image clarity, thereby better meeting the application requirements of lenses for in-vehicle assistance systems, as well as lightweight electronic devices such as mobile phones and tablets. However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens 100 can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions of the present application.

[0076] Specific embodiments of the optical imaging lens 100 applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0077] Example 1

[0078] The following reference Figures 1 to 2 An optical imaging lens 100 according to a first embodiment of the present application is described.

[0079] Figure 1The structure of an optical imaging lens 100 in Example 1 is shown. The optical imaging lens 100 includes a first lens group, a second lens group, a third lens group, an infrared filter 120, a protective glass 130, and an imaging surface S19, arranged in sequence along the optical axis 110 from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5, with the third lens L3 cemented to the fourth lens L4; and the third lens group includes a sixth lens L6 and a seventh lens L7. An aperture stop STO is provided between the image-side surface S4 of the second lens and the object-side surface S5 of the third lens.

[0080] In the first lens group, the first lens L1 has negative refractive power, and its object-side surface S1 and image-side surface S2 are both spherical surfaces, with the object-side surface S1 being concave at the near optical axis 110, and the image-side surface S2 being concave at the near optical axis 110. The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces, with the object-side surface S3 being convex at the near optical axis 110, and the image-side surface S4 being convex at the near optical axis 110.

[0081] In the second lens group, the third lens element L3 has negative refractive power, with its object-side surface S5 and image-side surface S6 both spherical surfaces, with the object-side surface S5 being concave at the near optical axis 110, and the image-side surface S6 being concave at the near optical axis 110. The fourth lens element L4 has positive refractive power, with its object-side surface S7 and image-side surface S8 both spherical surfaces, with the object-side surface S7 being convex at the near optical axis 110, and the image-side surface S8 being convex at the near optical axis 110. The fifth lens element L5 has positive refractive power, with its object-side surface S9 and image-side surface S10 both aspherical surfaces, with the object-side surface S9 being convex at the near optical axis 110, and the image-side surface S10 being convex at the near optical axis 110.

[0082] In the third lens group, the sixth lens element L6 has positive refractive power. Its object-side surface S11 and image-side surface S12 are both spherical surfaces, with the object-side surface S11 being convex at the near optical axis 110, and the image-side surface S12 being convex at the near optical axis 110. The seventh lens element L7 has negative refractive power. Its object-side surface S13 and image-side surface S14 are both spherical surfaces, with the object-side surface S13 being concave at the near optical axis 110, and the image-side surface S14 being concave at the near optical axis 110.

[0083] In this embodiment, the refractive index, Abbe number, and focal length are based on light with a wavelength of 546.074 nm. Table 1 lists relevant parameters of the optical imaging lens 100, including lens surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient), and focal length. Here, f represents the effective focal length of the optical imaging lens 100, FNO represents the aperture value, and FOV represents the maximum field of view of the optical imaging lens 100. Note that the units for the radius of curvature, thickness, and effective focal length of the lens are all in millimeters (mm). Taking the first lens L1 as an example, the first value in the "Thickness" column for first lens L1 is the thickness of the lens along optical axis 110, and the second value is the distance from the image-side surface of the lens to the next surface following the image-side direction along optical axis 110. The value for stop ST0 in the "Thickness" column is the distance from stop ST0 to the vertex of the next surface following the image-side surface (the vertex refers to the intersection of the surface and the optical axis 110). By default, the direction from the object-side surface of first lens L1 to the image-side surface of the last lens is defined as the positive direction of optical axis 110. A negative value indicates that stop ST0 is located to the right of the vertex of the object-side surface of the lens. A positive value for stop ST0 indicates that stop ST0 is located to the left of the vertex of the object-side surface of the lens.

[0084] Table 1

[0085]

[0086] The aspheric surface shape of the lens can be defined by, but is not limited to, the following formula:

[0087]

[0088] Wherein, x is the distance vector height from the vertex of the aspheric surface at a height of h along the optical axis 110; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1); k is the conic coefficient; A i Table 2 lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspheric surfaces S3, S4, S9, and S10 of the lens in Example 1.

[0089] Table 2

[0090]

[0091]

[0092] The maximum field of view of the optical imaging lens 100 corresponds to half the image height Imgh of 4.6725 mm. The distance EPL from the aperture STO to the imaging plane S19 of the optical imaging lens 100 on the optical axis 110 is 24.864 mm. The distance DOS from the object-side surface S1 of the first lens L1 to the aperture STO on the optical axis 100 is 8.375 mm. Combining the data in Tables 1 and 2, it can be seen that the optical imaging lens 100 of Example 1 meets the following requirements:

[0093] f12 / f=1.908; where f12 is the combined focal length of the first lens group, and f is the effective focal length of the optical imaging lens 100. Satisfying this relationship helps prevent significant aberrations in the first lens group, ensuring that the field of view of the optical imaging lens 100 meets usage requirements and improving the imaging resolution of the optical imaging lens 100, thereby achieving high-quality images.

[0094] Rs1 / Sags1=8.397; where Rs1 is the radius of curvature of the object-side surface S1 of the first lens element L1 at the optical axis 110, and Sags1 is the sag height of the object-side surface S1 of the first lens element L1 at the maximum effective aperture. Satisfying this relationship helps ensure the refractive power of the first lens element while preventing excessive curvature of the object-side surface of the first lens element, which would increase the difficulty of lens manufacturing.

[0095] f34 / (CT4-CT3)=-13.996; where f34 is the combined focal length of the third lens element L3 and the fourth lens element L4, CT4 is the thickness of the fourth lens element L4 along the optical axis 110, and CT3 is the thickness of the third lens element L3 along the optical axis 110. Satisfying this relationship allows for a reasonable combination of the third lens element L3 and the fourth lens element L4, thereby mutually correcting aberrations and reducing the aberration contribution ratio of the third lens element L3 and the fourth lens element L4 to the optical imaging lens 100.

[0096] f35 / f=2.412; where f35 is the combined focal length of the second lens group, and f is the effective focal length of the optical imaging lens 100. Satisfying this relationship not only helps control the angle of light beams exiting the second lens group, but also reduces the angle of light beams from the edge of the field of view entering the subsequent lens group, thereby minimizing higher-order aberrations in the optical imaging lens 100 and the outer diameter of the subsequent lens group. It also corrects for the field curvature produced by the first lens group, thereby minimizing its impact on the imaging resolution of the optical imaging lens 100.

[0097] |f67| / f=31.210; where |f67| is the absolute value of the combined focal length of the third lens group, and f is the effective focal length of the optical imaging lens 100. Satisfying this relationship reduces the angle of incidence of light entering the image-side photosensitive element of the optical imaging lens 100, improving the photosensitive performance of the photosensitive element and, consequently, the imaging quality of the optical imaging lens 100. This also helps to lengthen the back focus of the optical imaging lens 100, providing sufficient assembly space for the lens, reducing assembly sensitivity, and facilitating assembly of the optical imaging lens 100.

[0098] 2*Imgh / EPD=0.977; where Imgh is half the image height corresponding to the maximum field of view of the optical imaging lens 100, and EPD is the entrance pupil diameter of the optical imaging lens 100. Satisfying this relationship allows the optical imaging lens 100 to achieve a large image plane and a large aperture while also ensuring sufficient image brightness at the edges of the field of view, preventing vignetting and thus improving imaging quality.

[0099] FNO=1.6, where FNO is the aperture number of the optical imaging lens 100. Satisfying the above relationship helps improve imaging quality and enables the optical imaging lens 100 to have a large depth of field.

[0100] EPL / DOS = 2.969; where EPL is the distance from the aperture STO to the imaging surface S19 of the optical imaging lens 100 on the optical axis 110, and DOS is the distance from the object-side surface S1 of the first lens L1 to the aperture STO on the optical axis 110. Satisfying this relationship provides the optical imaging lens 100 with telecentricity, thereby enhancing the photosensitivity of the photosensitive element.

[0101] Figure 2 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens 100 of the first embodiment are shown respectively. The reference wavelength of the optical imaging lens 100 is 546.074nm. The longitudinal spherical aberration curve shows the deviation of the light rays with wavelengths of 656.2725nm, 587.5618nm, 546.0740nm, 486.0000nm and 435.8343nm from the convergence point after passing through the optical imaging lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of the optical imaging lens 100; and the distortion curve shows the distortion of the optical imaging lens 100 at different image heights. Figure 2 It can be seen that the optical imaging lens 100 provided in the first embodiment can achieve good imaging quality.

[0102] Example 2

[0103] The following reference Figures 3 and 4 An optical imaging lens 100 according to a second embodiment of the present application is described.

[0104] Figure 3 The structure of an optical imaging lens 100 in Example 2 is shown. The optical imaging lens 100 includes a first lens group, a second lens group, a third lens group, an infrared filter 120, a protective glass 130, and an imaging surface S19, arranged in sequence along the optical axis 110 from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5, with the third lens L3 cemented with the fourth lens L4; and the third lens group includes a sixth lens L6 and a seventh lens L7. An aperture stop STO is provided between the image-side surface S4 of the second lens L2 and the object-side surface S5 of the third lens L3.

[0105] In the first lens group, the first lens L1 has negative refractive power, and its object-side surface S1 and image-side surface S2 are both spherical surfaces, with the object-side surface S1 being concave at the near optical axis 110, and the image-side surface S2 being concave at the near optical axis 110. The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces, with the object-side surface S3 being convex at the near optical axis 110, and the image-side surface S4 being convex at the near optical axis 110.

[0106] In the second lens group, the third lens element L3 has negative refractive power, with its object-side surface S5 and image-side surface S6 both spherical surfaces, with the object-side surface S5 being concave at the near optical axis 110, and the image-side surface S6 being concave at the near optical axis 110. The fourth lens element L4 has positive refractive power, with its object-side surface S7 and image-side surface S8 both spherical surfaces, with the object-side surface S7 being convex at the near optical axis 110, and the image-side surface S8 being convex at the near optical axis 110. The fifth lens element L5 has positive refractive power, with its object-side surface S9 and image-side surface S10 both aspherical surfaces, with the object-side surface S9 being convex at the near optical axis 110, and the image-side surface S10 being convex at the near optical axis 110.

[0107] In the third lens group, the sixth lens element L6 has positive refractive power. Its object-side surface S11 and image-side surface S12 are both spherical surfaces, with the object-side surface S11 being convex at the near optical axis 110, and the image-side surface S12 being convex at the near optical axis 110. The seventh lens element L7 has negative refractive power. Its object-side surface S13 and image-side surface S14 are both spherical surfaces, with the object-side surface S13 being concave at the near optical axis 110, and the image-side surface S14 being concave at the near optical axis 110.

[0108] In this embodiment, the parameters of each lens in the optical imaging lens 100 are given in Table 3 and Table 4, wherein the definitions of each structure and parameter can be obtained from the first embodiment and are not repeated here.

[0109] Table 3

[0110]

[0111]

[0112] Table 4

[0113]

[0114] Combining the data in Table 3 and Table 4, it can be seen that the optical imaging lens 100 in Example 2 meets the following requirements:

[0115] Table 5

[0116]

[0117] according to Figure 4 It can be seen that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 provided in the second embodiment are all well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

[0118] Example 3

[0119] The following reference Figures 5 and 6 The optical imaging lens 100 according to the third embodiment of the present application is described.

[0120] Figure 5 The structure of the optical imaging lens 100 in Example 3 is shown. The optical imaging lens 100 includes a first lens group, a second lens group, a third lens group, an infrared filter 120, a protective glass 130, and an imaging surface S19, which are arranged in sequence along the optical axis 110 from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2. The second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5. The third lens L3 and the fourth lens L4 are cemented together. The third lens group includes a sixth lens L6 and a seventh lens L7. The sixth lens L6 and the seventh lens L7 are cemented together. A stop STO is provided between the image-side surface S4 of the second lens L2 and the object-side surface S5 of the third lens L3.

[0121] In the first lens group, the first lens L1 has negative refractive power, and its object-side surface S1 and image-side surface S2 are both spherical surfaces, with the object-side surface S1 being concave at the near optical axis 110, and the image-side surface S2 being concave at the near optical axis 110. The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces, with the object-side surface S3 being convex at the near optical axis 110, and the image-side surface S4 being convex at the near optical axis 110.

[0122] In the second lens group, the third lens element L3 has negative refractive power, with its object-side surface S5 and image-side surface S6 both spherical surfaces, with the object-side surface S5 being concave at the near optical axis 110, and the image-side surface S6 being concave at the near optical axis 110. The fourth lens element L4 has positive refractive power, with its object-side surface S7 and image-side surface S8 both spherical surfaces, with the object-side surface S7 being convex at the near optical axis 110, and the image-side surface S8 being convex at the near optical axis 110. The fifth lens element L5 has positive refractive power, with its object-side surface S9 and image-side surface S10 both aspherical surfaces, with the object-side surface S9 being convex at the near optical axis 110, and the image-side surface S10 being convex at the near optical axis 110.

[0123] In the third lens group, the sixth lens element L6 has positive refractive power. Its object-side surface S11 and image-side surface S12 are both spherical surfaces, with the object-side surface S11 being convex at the near optical axis 110, and the image-side surface S12 being convex at the near optical axis 110. The seventh lens element L7 has negative refractive power. Its object-side surface S13 and image-side surface S14 are both spherical surfaces, with the object-side surface S13 being concave at the near optical axis 110, and the image-side surface S14 being concave at the near optical axis 110.

[0124] In this embodiment, the parameters of each lens in the optical imaging lens 100 are given in Table 6 and Table 7, wherein the definitions of each structure and parameter can be obtained from the first embodiment and are not repeated here.

[0125] Table 6

[0126]

[0127] Table 7

[0128]

[0129] Combining the data in Table 6 and Table 7, it can be seen that the optical imaging lens 100 in Example 3 meets the following requirements:

[0130] Table 8

[0131]

[0132]

[0133] according to Figure 6 It can be seen that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 provided in the third embodiment are all well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

[0134] Example 4

[0135] The following reference Figures 7 and 8 An optical imaging lens 100 according to a fourth embodiment of the present application is described.

[0136] Figure 7 The structure of an optical imaging lens 100 in Example 4 is shown. The optical imaging lens 100 includes a first lens group, a second lens group, a third lens group, an infrared filter 120, a protective glass 130, and an imaging surface S19, arranged in sequence along the optical axis 110 from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5, with the third lens L3 cemented with the fourth lens L4; and the third lens group includes a sixth lens L6. An aperture stop STO is disposed between the image-side surface S4 of the second lens L2 and the object-side surface S5 of the third lens L3.

[0137] In the first lens group, the first lens L1 has negative refractive power, and its object-side surface S1 and image-side surface S2 are both spherical surfaces, with the object-side surface S1 being concave at the near optical axis 110, and the image-side surface S2 being concave at the near optical axis 110. The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces, with the object-side surface S3 being convex at the near optical axis 110, and the image-side surface S4 being convex at the near optical axis 110.

[0138] In the second lens group, the third lens element L3 has negative refractive power, with its object-side surface S5 and image-side surface S6 both spherical surfaces, with the object-side surface S5 being concave at the near optical axis 110, and the image-side surface S6 being concave at the near optical axis 110. The fourth lens element L4 has positive refractive power, with its object-side surface S7 and image-side surface S8 both spherical surfaces, with the object-side surface S7 being convex at the near optical axis 110, and the image-side surface S8 being convex at the near optical axis 110. The fifth lens element L5 has positive refractive power, with its object-side surface S9 and image-side surface S10 both aspherical surfaces, with the object-side surface S9 being convex at the near optical axis 110, and the image-side surface S10 being convex at the near optical axis 110.

[0139] In the third lens group, the sixth lens L6 has negative refractive power. Its object-side surface S11 and image-side surface S12 are both spherical surfaces. The object-side surface S11 is convex near the optical axis 110 , and the image-side surface S12 is concave near the optical axis 110 .

[0140] In this embodiment, the parameters of each lens in the optical imaging lens 100 are given in Tables 9 and 10, wherein the definitions of each structure and parameter can be obtained from the first embodiment and are not repeated here.

[0141] Table 9

[0142]

[0143]

[0144] Table 10

[0145]

[0146] Combining the data in Table 9 and Table 10, it can be seen that the optical imaging lens 100 in Example 4 meets the following requirements:

[0147] Table 11

[0148]

[0149] according to Figure 8 It can be seen that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 provided in the fourth embodiment are all well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

[0150] Example 5

[0151] The following reference Figures 9 and 10 An optical imaging lens 100 according to a fifth embodiment of the present application is described.

[0152] Figure 9 The structure of an optical imaging lens 100 in Example 5 is shown. The optical imaging lens 100 includes a first lens group, a second lens group, a third lens group, an infrared filter 120, a protective glass 130, and an imaging surface S19, arranged in sequence along the optical axis 110 from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5, with the third lens L3 cemented with the fourth lens L4; and the third lens group includes a sixth lens L6. An aperture stop STO is provided between the image-side surface S4 of the second lens L2 and the object-side surface S5 of the third lens L3.

[0153] In the first lens group, the first lens L1 has negative refractive power, and its object-side surface S1 and image-side surface S2 are both spherical surfaces, with the object-side surface S1 being concave at the near optical axis 110, and the image-side surface S2 being concave at the near optical axis 110. The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces, with the object-side surface S3 being convex at the near optical axis 110, and the image-side surface S4 being convex at the near optical axis 110.

[0154] In the second lens group, the third lens element L3 has negative refractive power, with its object-side surface S5 and image-side surface S6 both spherical surfaces, with the object-side surface S5 being concave at the near optical axis 110, and the image-side surface S6 being concave at the near optical axis 110. The fourth lens element L4 has positive refractive power, with its object-side surface S7 and image-side surface S8 both spherical surfaces, with the object-side surface S7 being convex at the near optical axis 110, and the image-side surface S8 being convex at the near optical axis 110. The fifth lens element L5 has positive refractive power, with its object-side surface S9 and image-side surface S10 both aspherical surfaces, with the object-side surface S9 being convex at the near optical axis 110, and the image-side surface S10 being convex at the near optical axis 110.

[0155] In the third lens group, the sixth lens L6 has negative refractive power. Its object-side surface S11 and image-side surface S12 are both spherical surfaces. The object-side surface S11 is convex near the optical axis 110 , and the image-side surface S12 is concave near the optical axis 110 .

[0156] In this embodiment, the parameters of each lens in the optical imaging lens 100 are given in Table 12 and Table 13, wherein the definitions of each structure and parameter can be obtained from the first embodiment and are not repeated here.

[0157] Table 12

[0158]

[0159] Table 13

[0160]

[0161] Combining the data in Table 12 and Table 13, it can be seen that the optical imaging lens 100 in Example 5 meets the following requirements:

[0162] Table 14

[0163]

[0164] according to Figure 10 It can be seen that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 provided in the fifth embodiment are all well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

[0165] like Figure 11 As shown, the present application further provides an imaging module 200, comprising the optical imaging lens 100 as described above and a photosensitive element 210. The photosensitive element 210 is disposed on the image side of the optical imaging lens 100, and the photosensitive surface of the photosensitive element 210 coincides with the imaging surface S19. Specifically, the photosensitive element 210 can be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor.

[0166] The imaging module 200 in the embodiment of the present application utilizes the aforementioned optical imaging lens 100. By grouping the lenses in the optical imaging lens 100 and rationally configuring the number, refractive power, and surface shapes of the lenses in the first lens group, the second lens group, and the third lens group, it is advantageous to eliminate aberrations within the optical imaging lens 100, achieve mutual correction of aberrations between the lenses, and enhance the imaging resolution of the optical imaging lens 100, enabling it to effectively capture detailed features of subjects at long distances, obtain high-quality images, and improve image clarity.

[0167] like Figure 12 As shown, the present application also provides an electronic device 300, including a housing 310 and the imaging module 200 as described above, and the imaging module 200 is mounted on the housing 310. Specifically, the imaging module 200 is disposed in the housing 310 and exposed from the housing 310 to acquire images. The housing 310 can provide the imaging module 200 with protection such as dustproof, waterproof and drop-proof. A hole corresponding to the imaging module 200 is provided on the housing 310 to allow light to pass into or out of the housing 310 through the hole. The electronic device 300 is any device with an image acquisition function, for example, it can be any one of wearable devices such as a mobile phone, a tablet computer, a laptop computer, a personal digital assistant, a smart bracelet, a smart watch, etc. The imaging module 200 cooperates with the electronic device 300 to realize image acquisition and reproduction of the target object.

[0168] See also Figure 13 , the above-mentioned electronic device 300 can be applied to the driving device 400. The driving device 400 can be an autonomous driving car or a non-autonomous driving car. Specifically, the driving device 400 includes a vehicle body 410, and the electronic device 300 is installed at any position of the vehicle body 410 to obtain a clear environmental image around the vehicle body 410. In order to grasp the road conditions ahead in real time and provide protection for safe driving, the electronic device 300 can be used as a forward-looking camera device of the driving device 400 to obtain the scene information in front of the driving device 400. In addition, a display screen 420 is also provided in the driving device 400. The display screen 420 is installed in the vehicle body 410, and the electronic device 300 is communicatively connected to the display screen 420. The image information obtained by the electronic device 300 can be transmitted to the display screen 420 for display, so that the driver can obtain more complete surrounding image information and improve safety during driving. For autonomous driving cars, the imaging module 200 can also be installed on the top of the vehicle body. In this case, multiple electronic devices 300 are installed on the autonomous vehicle to obtain 360-degree environmental information around the vehicle. This information is then transmitted to the autonomous vehicle's analysis and processing unit for real-time analysis of road conditions around the vehicle 410. The use of electronic devices 300 improves the accuracy of the analysis performed by the analysis and processing unit, thereby enhancing the safety of autonomous driving.

[0169] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0170] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens comprises, in order from the object side to the image side along the optical axis: A first lens group includes, in order from the object side to the image side along the optical axis, a first lens and a second lens, the first lens having negative refractive power, the object-side surface and the image-side surface of the first lens being concave near the optical axis, and the second lens having positive refractive power; The second lens group includes, in order from the object side to the image side along the optical axis, a third lens, a fourth lens, and a fifth lens, wherein the third lens has negative refractive power, and both the object-side and image-side surfaces of the third lens are concave near the optical axis; the fourth lens has positive refractive power, and both the object-side and image-side surfaces of the fourth lens are convex near the optical axis; and the fifth lens has positive refractive power; A third lens group includes a sixth lens having refractive power, and an object-side surface of the sixth lens is convex near the optical axis; The optical imaging lens satisfies the following relationship: 8 <Rs1 / Sags1<10.5; Wherein, Rs1 is the radius of curvature of the object side surface of the first lens at the optical axis, and Sags1 is the sag height of the object side surface of the first lens at the maximum effective aperture; The optical imaging lens satisfies the following relationship: 1.5 <f12 / f<2.5; Wherein, f12 is the combined focal length of the first lens group, and f is the effective focal length of the optical imaging lens.

2. The optical imaging lens according to claim 1, wherein: The third lens group further includes a seventh lens. The seventh lens is located on the image side of the sixth lens along the optical axis. The seventh lens has negative refractive power. Both the object-side surface and the image-side surface of the seventh lens are concave near the optical axis.

3. The optical imaging lens according to claim 2, wherein: The sixth lens is cemented to the seventh lens.

4. The optical imaging lens according to claim 1, wherein: The third lens is cemented to the fourth lens.

5. The optical imaging lens according to any one of claims 1 to 4, wherein: The optical imaging lens satisfies the following relationship: -16.5 <f34 / (CT4-CT3)<-10; Wherein, f34 is the combined focal length of the third lens and the fourth lens, CT4 is the thickness of the fourth lens on the optical axis, and CT3 is the thickness of the third lens on the optical axis.

6. The optical imaging lens according to any one of claims 1 to 4, wherein: The optical imaging lens satisfies the following relationship: 1 <f35 / f<3; Among them, f35 is the combined focal length of the second lens group, and f is the effective focal length of the optical imaging lens.

7. The optical imaging lens according to any one of claims 1 to 4, wherein: The optical imaging lens satisfies the following relationship: |f67| / f>5; Wherein, |f67| is the absolute value of the combined focal length of the third lens group, and f is the effective focal length of the optical imaging lens.

8. The optical imaging lens according to any one of claims 1 to 4, wherein: The optical imaging lens satisfies the following relationship: 2*Imgh / EPD<1; Wherein, Imgh is half of the image height corresponding to the maximum field angle of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

9. The optical imaging lens according to any one of claims 1 to 4, wherein: The optical imaging lens satisfies the following relationship: FNO≤1.6; Wherein, FNO is the aperture number of the optical imaging lens.

10. The optical imaging lens according to any one of claims 1 to 4, wherein: The optical imaging lens satisfies the following relationship: 2 <EPL / DOS<3; Wherein, EPL is the distance from the aperture to the imaging surface of the optical imaging lens on the optical axis, and DOS is the distance from the object side surface of the first lens to the aperture on the optical axis.

11. An imaging module, characterized in that: include: The optical imaging lens according to any one of claims 1 to 10; The photosensitive element is arranged on the image side of the optical imaging lens.

12. An electronic device, characterized in that: include: case; The imaging module according to claim 11 is arranged on the housing.

13. A driving device, characterized in that: include: vehicle body; The electronic device according to claim 12, is arranged on the vehicle body to obtain environmental information around the vehicle body.

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