Optical lenses, imaging modules and electronic devices

Abstract

The present application relates to an optical lens, an imaging module and an electronic device. The optical lens includes, in order from the object side to the image side along the optical axis, a first lens with refractive power; a second lens with refractive power, whose object side surface is convex near the optical axis; a third lens with positive refractive power, whose image side surface is convex near the optical axis; a fourth lens with negative refractive power, whose image side surface is concave near the optical axis; a fifth lens with positive refractive power, whose object side surface is concave near the optical axis and whose image side surface is convex near the optical axis; a sixth lens with negative refractive power, whose object side surface is convex near the optical axis and whose image side surface is concave near the optical axis, the object side surface and the image side surface of the sixth lens are both aspherical, and at least one of the object side surface and the image side surface contains at least one inflection point. The above optical lens can take into account the imaging characteristics of large aperture, wide viewing angle and high pixel when meeting specific relationships, and also has the characteristics of miniaturization.

Description

Technical Field

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

[0002] With technological advancements and the continuous development of smartphone manufacturing technology, it has become increasingly common for a single phone to be equipped with multiple cameras with different functions. Furthermore, with advancements in semiconductor manufacturing technology, the pixel size of photosensitive elements has gradually decreased, allowing for an increasing number of pixels within a given sensor size. This has enabled the realization of higher-definition images within the same space. Therefore, to accommodate the space requirements of electronic devices such as mobile phones, tablets, smartwatches, and security cameras equipped with multiple cameras, lenses face the significant challenges of miniaturization, lightweighting, and achieving higher-definition images.

[0003] However, while traditional optical lenses with large apertures and high pixels improve image quality, they also make it difficult to miniaturize the lens due to the increased number of lenses that make up the device. Summary of the Invention

[0004] Based on this, it is necessary to provide an improved optical lens to address the problem that traditional optical lenses are difficult to achieve both high pixel image quality and miniaturization.

[0005] An optical lens, comprising, in order from the object side to the image side along the optical axis:

[0006] a first lens having refractive power;

[0007] a second lens having refractive power, wherein the object-side surface of the second lens is convex near the optical axis;

[0008] a third lens element having positive refractive power, wherein the image-side surface of the third lens element is convex near the optical axis;

[0009] a fourth lens element having negative refractive power, wherein the image-side surface of the fourth lens element is concave near the optical axis;

[0010] a fifth lens element having positive refractive power, wherein the object-side surface of the fifth lens element is concave near the optical axis and the image-side surface is convex near the optical axis;

[0011] a sixth lens element having negative refractive power, wherein the object-side surface of the sixth lens element is convex near the optical axis and the image-side surface is concave near the optical axis; both the object-side surface and the image-side surface of the sixth lens element are aspherical, and at least one of the object-side surface and the image-side surface contains at least one inflection point;

[0012] The optical lens satisfies the following relationship:

[0013] 2mm<TTL / tan(HFOV)<3mm;

[0014] Wherein, TTL represents the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, and HFOV represents half of the diagonal field of view of the optical lens.

[0015] By selecting an appropriate number of lenses and rationally allocating their refractive power, surface shape, and effective focal length, the above-mentioned optical lens can enhance its imaging resolution and effectively correct aberrations, thereby improving resolution and ensuring image clarity. Furthermore, when these relationships are met, the overall lens length can be shortened while achieving a wide angle, which also facilitates increasing the lens aperture and improving imaging in low-light conditions. However, when TTL / tan(HFOV) exceeds the upper limit, it becomes difficult to control the overall lens length within a small range, hindering lens miniaturization.

[0016] In one embodiment, the object-side surface and the image-side surface of each of the first to sixth lenses are aspherical surfaces.

[0017] Through the above-mentioned method, the flexibility of lens design can be improved, and aberrations can be effectively corrected to improve the imaging quality of the optical lens.

[0018] In one embodiment, the optical lens satisfies the following relationship: TTL / ∑AT<11; wherein ∑AT represents the sum of the distances on the optical axis from the image side surface of the preceding lens to the object side surface of the succeeding lens in each adjacent lens from the first lens to the sixth lens.

[0019] When the above relationship is satisfied, the ratio of the total lens length to the air gap between adjacent lenses can be reasonably configured, thereby reducing the air gap between adjacent lenses within the processable range, thereby reducing the total lens length and achieving ultra-thin characteristics. However, when TTL / ∑AT exceeds the upper limit, the air gap between adjacent lenses is too small, which tends to increase the sensitivity of the lens, hindering lens assembly and increasing the difficulty of processing.

[0020] In one embodiment, the optical lens satisfies the following relationship: 0.5<RS3 / f<3.5; wherein RS3 represents the curvature radius of the object side of the second lens at the optical axis, and f represents the effective focal length of the optical lens.

[0021] When the above relationship is met, the curvature radius of the object side of the second lens at the optical axis and the effective focal length of the lens can be reasonably configured, which is beneficial to correcting the aberrations of the middle and edge fields of view of the lens and improving the imaging quality.

[0022] In one embodiment, the optical lens satisfies the following relationship: TTL / ImgH≤1.5; wherein ImgH represents half of the diagonal length of the effective pixel area on the imaging surface of the optical lens.

[0023] When the above relationship is met, the overall lens length and imaging surface size can be kept within a reasonable range, thereby increasing the imaging surface and improving shooting effects, while also reducing the overall lens length and achieving miniaturization. However, when TTL / ImgH exceeds the upper limit, the overall lens length tends to be excessively long, hindering miniaturization and ultra-thinness of the lens.

[0024] In one embodiment, the optical lens satisfies the following relationship: -2<f / RS6<-0.5; wherein f represents the effective focal length of the optical lens, and RS6 represents the curvature radius of the image side surface of the third lens at the optical axis.

[0025] When the above relationship is satisfied, the effective focal length of the optical lens and the radius of curvature of the image side surface of the third lens at the optical axis can be properly configured, thereby improving the matching degree between the chief ray angle (CRA) of the off-axis field of view incident on the imaging surface and the photosensitive chip, further improving the photosensitivity of the photosensitive chip, thereby improving the image resolution and ensuring image quality. However, when f / RS6 is lower than the lower limit, the radius of curvature of the image side surface of the third lens at the optical axis is likely to be too small, and the image side surface of the third lens is too curved, which is not conducive to the processing of the image side surface of the third lens.

[0026] In one embodiment, the optical lens satisfies the following relationship: -2<f3 / RS6<-0.5; wherein f3 represents the effective focal length of the third lens, and RS6 represents the curvature radius of the image side surface of the third lens at the optical axis.

[0027] When the above relationship is satisfied, the effective focal length of the third lens element and the radius of curvature of the image side surface of the third lens element at the optical axis can be reasonably configured, thereby facilitating the correction of distortion in the paraxial region of the optical lens imaging surface and improving imaging quality. Furthermore, the positive refractive power provided by the third lens element also facilitates miniaturization of the lens. However, when f3 / RS6 falls below the lower limit, the radius of curvature of the image side surface of the third lens element at the optical axis is likely to be too small, resulting in excessive curvature of the image side surface of the third lens element, making it difficult to process the image side surface of the third lens element and increasing the difficulty of lens manufacturing.

[0028] In one embodiment, the optical lens satisfies the following relationship: 1.5<f / EPD<2.5; wherein f represents the effective focal length of the optical lens, and EPD represents the entrance pupil diameter of the optical lens.

[0029] When the above relationship is met, the effective focal length and entrance pupil diameter of the optical lens can be reasonably configured, thereby facilitating a larger aperture and a smaller overall length, while also maintaining the lens's wide-angle characteristics and achieving high-definition wide-angle photography. However, when f / EPD is higher than the upper limit, the lens aperture tends to be smaller, hindering sufficient light intake in darker shooting environments, resulting in reduced image brightness and poor image quality.

[0030] In one embodiment, the optical lens satisfies the following relationship:

[0031] (C65+C54+C43+C32+C21) / 5<0.3mm; wherein, C21 represents the difference between the maximum effective semi-diameter of the second lens objective side and the maximum effective semi-diameter of the first lens objective side, C32 represents the difference between the maximum effective semi-diameter of the third lens objective side and the maximum effective semi-diameter of the second lens objective side, C43 represents the difference between the maximum effective semi-diameter of the fourth lens objective side and the maximum effective semi-diameter of the third lens objective side, C54 represents the difference between the maximum effective semi-diameter of the fifth lens objective side and the maximum effective semi-diameter of the fourth lens objective side, and C65 represents the difference between the maximum effective semi-diameter of the sixth lens objective side and the maximum effective semi-diameter of the fifth lens objective side.

[0032] When the above relationship is satisfied, the average value of the difference in the maximum effective apertures of adjacent lens elements can be appropriately configured, thereby promoting a smooth transition of light between the lenses, reducing stray light, and lowering the probability of ghosting. However, when (C65+C54+C43+C32+C21) / 5 exceeds the upper limit, the average value of the difference in the maximum effective apertures of adjacent lens elements on the objective side is too large, which can easily lead to excessive light deflection angles between the lenses, increasing the probability of ghosting and reducing the lens's imaging quality.

[0033] In one embodiment, the optical lens satisfies the following relationship: 3.5<f12 / EPD<10; wherein f12 represents the combined focal length of the first lens and the second lens, and EPD represents the entrance pupil diameter of the optical lens.

[0034] When the above relationship is met, the combined focal length of the first lens and the second lens and the entrance pupil diameter of the optical lens can be reasonably configured, which is beneficial for shortening the total length of the lens while reducing the aberration of the edge field of view and further improving the imaging quality.

[0035] In one embodiment, the optical lens satisfies the following relationship:

[0036] 1.5<f3456 / EPD<4.5; wherein f3456 represents the combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens, and EPD represents the entrance pupil diameter of the optical lens.

[0037] When the above relationship is satisfied, the ratio of the combined focal length of the third, fourth, fifth, and sixth lenses to the entrance pupil diameter of the optical lens can be kept within a reasonable range. This helps to further shorten the overall lens length while ensuring sufficient light intake. It also balances the aberrations between the third, fourth, fifth, and sixth lenses, resulting in better image quality. However, when f3456 / EPD exceeds the upper limit, the entrance pupil diameter of the optical lens is too small, resulting in insufficient light throughput during shooting and a decrease in image quality.

[0038] In one embodiment, the optical lens satisfies the following relationship:

[0039] 0.5<f12 / f3456<4.5; wherein f12 represents the combined focal length of the first lens and the second lens, and f3456 represents the combined focal length of the third lens, the fourth lens, the fifth lens, and the sixth lens.

[0040] When the above relationship is satisfied, the combined focal length of the first and second lenses, as well as the combined focal lengths of the third, fourth, fifth, and sixth lenses, can be rationally distributed, thereby balancing the sensitivity of each lens and further reducing the overall length of the lens, ensuring miniaturization. However, when f12 / f3456 falls below the lower limit, the combined focal length of the first and second lenses is too small, resulting in excessive overall refractive power of the first and second lenses, which is not conducive to aberration correction.

[0041] In one embodiment, the optical lens satisfies the following relationship: 1.5<f12 / f<5.5; wherein f12 represents the combined focal length of the first lens and the second lens, and f represents the effective focal length of the optical lens.

[0042] When the above relationship is satisfied, the combined focal length of the first and second lenses, as well as the effective focal length of the optical lens, can be rationally configured, thereby improving the field curvature and distortion of the optical lens, reducing the difficulty of lens molding and processing, and also shortening the overall length of the lens, achieving miniaturization. However, when f12 / f exceeds the upper limit or falls below the lower limit, the overall refractive power of the first and second lenses can easily be too low or too high, which is not conducive to aberration correction.

[0043] In one embodiment, the optical lens satisfies the following relationship:

[0044] 1<f3456 / f<2; wherein, f3456 represents the combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens, and f represents the effective focal length of the optical lens.

[0045] When the above relationship is satisfied, the combined focal length of the third, fourth, fifth, and sixth lenses, as well as the effective focal length of the optical lens, can be rationally configured, thereby facilitating correction of chromatic aberration and field curvature. This also reduces the angle of light deflection between adjacent lenses, thereby reducing lens sensitivity and molding difficulty. However, when f3456 / f falls below the lower limit, the combined positive refractive power provided by the third, fourth, fifth, and sixth lenses is excessive, resulting in excessive light deflection between the lenses, hindering aberration correction and leading to reduced image quality.

[0046] In one embodiment, the optical lens satisfies the following relationship:

[0047] 0<SAG12 / SAG22<75; wherein, SAG12 represents the distance from the intersection of the image side surface of the first lens and the optical axis to the maximum effective aperture of the image side surface of the first lens in the direction of the optical axis, and SAG22 represents the distance from the intersection of the image side surface of the second lens and the optical axis to the maximum effective aperture of the image side surface of the second lens in the direction of the optical axis.

[0048] When the above relationship is satisfied, the image-side sag of the first lens element and the image-side sag of the second lens element can be properly configured, which facilitates correction of lens aberrations. It also keeps the curvature of the lens within a reasonable range, reducing the difficulty of lens manufacturing. However, when SAG12 / SAG22 exceeds the upper limit, the image-side surface of the second lens element becomes too smooth, making it difficult to correct aberrations.

[0049] In one embodiment, the optical lens satisfies the following relationship:

[0050] -5.5<SAG41 / SAG42<-1; wherein, SAG41 represents the distance from the intersection of the object side surface of the fourth lens and the optical axis to the maximum effective aperture of the object side surface of the fourth lens in the direction of the optical axis, and SAG42 represents the distance from the intersection of the image side surface of the fourth lens and the optical axis to the maximum effective aperture of the image side surface of the fourth lens in the direction of the optical axis.

[0051] When the above relationship is met, the object-side sag of the fourth lens element and the image-side sag of the fourth lens element can be reasonably configured, thereby facilitating the correction of spherical aberration and chromatic aberration generated by the front lens element. It can also reduce the degree of light deflection on the object-side and image-side surfaces of the fourth lens element, thereby reducing the overall sensitivity of the optical lens. However, when SAG41 / SAG42 is below the lower limit, the curvature of the object-side and image-side surfaces of the fourth lens element differs significantly, which can easily lead to excessive light deflection, making it difficult to balance aberrations and increasing the difficulty of lens processing and assembly.

[0052] In one embodiment, the optical lens satisfies the following relationship:

[0053] -1<SAG61 / SAG62<0; wherein, SAG61 represents the distance from the intersection of the object side surface of the sixth lens and the optical axis to the maximum effective aperture of the object side surface of the sixth lens in the direction of the optical axis, and SAG62 represents the distance from the intersection of the image side surface of the sixth lens and the optical axis to the maximum effective aperture of the image side surface of the sixth lens in the direction of the optical axis.

[0054] When the above relationship is satisfied, the object-side sag height of the sixth lens element and the image-side sag height of the sixth lens element can be reasonably configured, thereby suppressing the incident angle of the chief ray in the off-axis field of view on the lens imaging plane, ensuring better matching with the photosensitive chip, thereby enhancing the photosensitive performance of the photosensitive chip, ensuring illumination at the edge of the field of view, improving the lens resolution, and enhancing imaging quality. This also helps to reduce the rear end size of the lens and ensure miniaturization. However, when SAG61 / SAG62 is below the lower limit, the curvature of the object-side and image-side surfaces of the sixth lens element differs significantly, which is not conducive to lens processing and assembly.

[0055] In one embodiment, the optical lens satisfies the following relationship:

[0056] 0.5<(SAG61-SAG62) / (SAG41-SAG42)<2.5; wherein, SAG41 represents the distance from the intersection of the object side surface of the fourth lens and the optical axis to the maximum effective aperture of the object side surface of the fourth lens in the direction of the optical axis, SAG42 represents the distance from the intersection of the image side surface of the fourth lens and the optical axis to the maximum effective aperture of the image side surface of the fourth lens in the direction of the optical axis, SAG61 represents the distance from the intersection of the object side surface of the sixth lens and the optical axis to the maximum effective aperture of the object side surface of the sixth lens in the direction of the optical axis, SAG62 represents the distance from the intersection of the image side surface of the sixth lens and the optical axis to the maximum effective aperture of the image side surface of the sixth lens in the direction of the optical axis.

[0057] When the above relationship is satisfied, the object-side and image-side sags of the fourth and sixth lenses can be reasonably configured, thereby preventing the fourth and sixth lenses from being overbent, reducing the difficulty of lens processing, and also improving the stability of lens assembly.

[0058] In one embodiment, the optical lens satisfies the following relationship: -5<RS9 / f5<-1; wherein RS9 represents the curvature radius of the object side of the fifth lens at the optical axis, and f5 represents the effective focal length of the fifth lens.

[0059] When the above relationship is satisfied, the radius of curvature of the object side of the fifth lens element at the optical axis and the effective focal length of the fifth lens element can be appropriately configured to prevent excessive deflection of peripheral field light at the object side of the fifth lens element, thereby reducing the sensitivity of the optical lens. However, when RS9 / f5 exceeds the upper limit, the tilt angle at the edge of the object side of the fifth lens element can be too large, which can cause stray light and increase the probability of ghosting.

[0060] This application also provides an imaging module.

[0061] An imaging module comprises the above-mentioned optical lens and a photosensitive element, wherein the photosensitive element is arranged on the image side of the optical lens.

[0062] The above-mentioned imaging module, using the aforementioned optical lens, can capture images with high pixels and wide viewing angles. At the same time, the imaging module also has the characteristics of miniaturization and lightweight structure, which can be easily adapted to devices with limited size such as mobile phones, tablets and car lenses.

[0063] The present application also provides an electronic device.

[0064] An electronic device comprises a housing and the imaging module as described above, wherein the imaging module is mounted on the housing.

[0065] The electronic device mentioned above can capture images with a wide viewing angle and high pixels by utilizing the aforementioned imaging module, thereby improving the user's shooting experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 Schematic diagram of the structure of the optical lens of Example 1 of the present application is shown;

[0067] Figure 2 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 1 are shown respectively;

[0068] Figure 3 Schematic diagram of the structure of the optical lens of Example 2 of the present application is shown;

[0069] Figure 41. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 2 are respectively shown;

[0070] Figure 5 Schematic diagram of the structure of the optical lens of Example 3 of the present application is shown;

[0071] Figure 6 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 3 are shown respectively;

[0072] Figure 7 Schematic diagram of the structure of the optical lens of Example 4 of the present application is shown;

[0073] Figure 8 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 4 are respectively shown;

[0074] Figure 9 Schematic diagram of the structure of the optical lens of Example 5 of the present application is shown;

[0075] Figure 10 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 5 are shown respectively;

[0076] Figure 11 Schematic diagram of the structure of the optical lens of Example 6 of the present application is shown;

[0077] Figure 12 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 6 are shown respectively;

[0078] Figure 13 1 shows a schematic structural diagram of an optical lens according to Example 7 of the present application;

[0079] Figure 14 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 7 are shown respectively;

[0080] Figure 15 1 shows a schematic structural diagram of an optical lens according to Example 8 of the present application;

[0081] Figure 16 The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 8 are shown;

[0082] Figure 17 1 shows a schematic structural diagram of an optical lens according to Example 9 of the present application;

[0083] Figure 18 The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 9 are shown;

[0084] Figure 19 10 is a schematic structural diagram of an optical lens according to embodiment 10 of the present application;

[0085] Figure 20 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 10 are shown;

[0086] Figure 21 A schematic diagram of an imaging module according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0087] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0088] 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 also be an element centered thereon. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear", "circumferential" and similar expressions used herein are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0089] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0090] 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.

[0091] 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.

[0092] In the following description, if a lens surface is described as convex and the location of the convex surface is unspecified, it means that the lens surface is convex at least near the optical axis. If a lens surface is described as concave and the location of the concave surface is unspecified, it means that the lens surface is concave at least near the optical axis. Here, near the optical axis refers to the area near the optical axis. Specifically, the convexity or concavity of a lens surface area is determined by whether the intersection of a parallel ray passing through the area with the optical axis is on the image side or the object side. For example, if a parallel ray passing through the area focuses toward the image side and intersects the optical axis on the image side, the area is convex. Conversely, if a ray passing through the area diverges and its extension intersects the optical axis on the object side, the area is concave. Furthermore, a lens includes an area near the optical axis, an area near the circumference, and an extension for securing the lens. Ideally, imaging light does not pass through the extension. Therefore, the effective aperture of the lens can be defined as the area from the area near the optical axis to the area near the circumference. In the following embodiments, some extensions are omitted for simplicity. Further, the method for determining the range of the area near the optical axis, the area near the circumference, or multiple areas is as follows:

[0093] First, define a center point as the intersection of the lens surface and the optical axis. The distance from the center point to the edge of the lens's effective aperture is the lens's effective semi-aperture. An inflection point is a point on the lens surface where a tangent line passing through the inflection point is perpendicular to the optical axis. If the lens has multiple inflection points radially outward from the center point, they are designated as the first inflection point, the second inflection point, and the inflection point farthest from the center point within the lens's effective aperture is designated as the Nth inflection point. The area between the center point and the first inflection point is defined as the optical axis vicinity, the area radially outward from the Nth inflection point is defined as the circumferential vicinity, and the area between the first and Nth inflection points is divided into different regions based on the inflection points. If there are no inflection points on the lens surface, the optical axis vicinity is defined as the region corresponding to 0% to 50% of the effective semi-aperture, and the circumferential vicinity is defined as the region corresponding to 50% to 100% of the effective semi-aperture.

[0094] The features, principles and other aspects of the present application will be described in detail below.

[0095] Please also refer to Figure 1 、 Figure 3 、 Figure 5 、 Figure 7 、 Figure 9 、 Figure 11 、 Figure 13 、 Figure 15 、 Figure 17 and Figure 19 The embodiments of the present application provide an optical lens that achieves a wide viewing angle, high pixel count, and miniaturization. Specifically, the optical lens includes six lenses with refractive power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in sequence along the optical axis from the object side to the image side, with the imaging surface of the optical lens located on the image side of the sixth lens.

[0096] The first and second lenses can have positive or negative refractive power. Positive refractive power helps converge light and focus it on the imaging plane, shortening the overall length of the lens and achieving miniaturization and ultra-thinness. Negative refractive power allows light incident at wide angles to enter the lens, thereby expanding the optical lens's field of view and achieving wide-angle viewing. Furthermore, the second lens's object side, near the optical axis, is convex, correcting aberrations in the central and peripheral fields of view, improving the lens's imaging quality.

[0097] The third lens has positive refractive power, and its image-side surface near the optical axis is convex, which is beneficial for correcting the distortion in the paraxial area on the imaging surface of the optical lens, improving the imaging quality, and also conducive to the miniaturization of the lens.

[0098] The fourth lens element has negative refractive power, and its image-side surface near the optical axis is concave, which helps prevent excessive refracting of light, corrects lens aberrations, and further improves image quality.

[0099] The fifth lens element has positive refractive power, and its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex. This helps prevent excessive deflection of light at the edge of the field of view, which would increase the sensitivity of the lens. It also helps reduce the formation of stray light and the chance of ghosting.

[0100] The sixth lens has negative refractive power, and its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis, which is beneficial to further correct lens aberrations and ensure imaging quality. In addition, the object side surface and image side surface of the sixth lens are both set as aspherical surfaces, which is beneficial to improve the flexibility of lens design, and effectively correct aberrations and improve the imaging quality of the optical lens. Of course, the object side surface and image side surface of other lenses except the sixth lens can also be set as aspherical surfaces to better correct lens aberrations and improve imaging quality. Furthermore, at least one surface of the object side surface and / or image side surface of the sixth lens contains at least one inflection point, which is beneficial to suppress the incident angle of the main light of the off-axis field of view on the imaging plane, improve the photosensitivity of the pixel unit in the edge area of ​​the photosensitive chip, ensure the illumination of the edge field of view, and thus improve the imaging resolution capability of the lens.

[0101] The optical lens is also provided with an aperture, which is provided on the object side of the optical lens to better control the size of the incident light beam and improve the imaging quality of the optical lens. In addition, placing the aperture in front can further shorten the total length of the lens and meet the application requirements of miniaturization. Specifically, the aperture includes an aperture aperture and a field aperture. Preferably, the aperture is an aperture aperture. The aperture aperture can be located on the surface of the lens (for example, the object side and the image side) and form an operative relationship with the lens, for example, by coating a light-blocking coating on the surface of the lens to form an aperture aperture on the surface; or by fixing the surface of the lens with a clamp, the clamp structure located on the surface can limit the width of the imaging beam of the object point on the axis, thereby forming an aperture aperture on the surface.

[0102] Specifically, the optical lens satisfies the following relationship: 2mm<TTL / tan(HFOV)<3mm; wherein TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, and HFOV represents half of the diagonal field of view of the optical lens. TTL / tan(HFOV) can be 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm or 2.9mm. Under the condition that the above relationship is met, it is conducive to the reasonable configuration of the total length and field of view of the lens, so that the wide-angle characteristics can be achieved while reducing the total length of the lens. At the same time, it is also conducive to increasing the lens aperture and improving the low-light shooting capability of the lens. Taking into account the difficulty of the lens assembly process and the need to balance image quality and wide-angle characteristics, TTL will not be too small and tan(HFOV) will not be too large. That is, TTL / tan(HFOV) greater than 2mm can also achieve a better configuration of the optical lens. When TTL / tan(HFOV) is higher than the upper limit, it is not conducive to controlling the total length of the lens within a smaller range, and it is more difficult to balance the miniaturization and wide-angle of the lens.

[0103] When the above optical lens is used for imaging, light emitted or reflected by the subject enters the optical lens from the object side, passes through the first lens, second lens, third lens, fourth lens, fifth lens and sixth lens in sequence, and finally converges on the imaging surface.

[0104] The above-mentioned optical lens can enhance the imaging resolution capability of the lens and effectively correct aberrations by selecting an appropriate number of lenses and reasonably allocating the refractive power, surface shape and effective focal length of each lens, thereby improving the lens resolution and ensuring image clarity; at the same time, by controlling the total length of the lens and the field of view of the lens to meet the above-mentioned relationship, it is beneficial to take into account the miniaturization and wide-angle of the lens, and it is also beneficial to increase the aperture of the lens, which in turn helps to improve the brightness of the image surface and ensure the imaging quality of the lens in dark light environments.

[0105] In an exemplary embodiment, the optical lens satisfies the following relationship: TTL / ∑AT<11; wherein ∑AT represents the sum of the distances on the optical axis from the image side surface of the preceding lens to the object side surface of the succeeding lens in each adjacent lens from the first lens to the sixth lens. TTL / ∑AT can be 6, 6.5, 7, 7.5, 8, 8.5, 8.8, 9.1, 9.4, 9.7, 10, 10.3 or 10.6. Under the condition that the above relationship is satisfied, the ratio of the total length of the lens to the air gap between adjacent lenses can be reasonably configured, which is conducive to reducing the air gap between adjacent lenses within the processable range, thereby reducing the total length of the lens and achieving ultra-thin characteristics. However, when TTL / ∑AT is greater than or equal to 11, the air gap between adjacent lenses is too small, which easily increases the sensitivity of the lens, is not conducive to the assembly of the lens, and leads to increased processing difficulty.

[0106] In an exemplary embodiment, the optical lens satisfies the following relationship: 0.5<RS3 / f<3.5; wherein RS3 represents the radius of curvature of the object side of the second lens at the optical axis, and f represents the effective focal length of the optical lens. RS3 / f can be 0.6, 0.7, 0.8, 1, 1.1, 1.5, 2, 2.5, 3, 3.2 or 3.4. Under the condition that the above relationship is satisfied, the radius of curvature of the object side of the second lens at the optical axis and the effective focal length of the lens can be reasonably configured, which is beneficial to correct the aberrations of the middle and edge fields of view of the lens and improve the imaging quality. When RS3 / f is less than or equal to 0.5, the object side of the second lens is too curved, which is not conducive to the processing and molding of the lens; and when RS3 / f is greater than or equal to 3.5, the object side of the second lens is too smooth, which is not conducive to correcting the lens aberrations.

[0107] In an exemplary embodiment, the optical lens satisfies the following relationship: TTL / ImgH≤1.5; wherein ImgH represents half the diagonal length of the effective pixel area on the imaging surface of the optical lens. TTL / ImgH can be 1, 1.1, 1.2, 1.3, 1.35, 1.4, 1.42, 1.44, 1.46, 1.48, or 1.5. Under the condition that the above relationship is satisfied, the total length of the lens and the size of the imaging surface can be within a reasonable range, which is conducive to increasing the imaging surface and improving the shooting effect. At the same time, the total length of the lens can be reduced, and the miniaturization of the lens can be achieved. However, when TTL / ImgH is greater than 1.5, the total length of the lens is likely to be too long, which is not conducive to the miniaturization and ultra-thinness of the lens.

[0108] In an exemplary embodiment, the optical lens satisfies the following relationship: -2<f / RS6<-0.5; wherein f represents the effective focal length of the optical lens, and RS6 represents the radius of curvature of the image side surface of the third lens at the optical axis. f / RS6 can be -1.8, -1.6, -1.4, -1.2, -1, -0.9, -0.8, -0.7, or -0.6. Under the condition that the above relationship is satisfied, the effective focal length of the optical lens and the radius of curvature of the image side surface of the third lens at the optical axis can be reasonably configured, which is conducive to improving the matching degree between the incident angle of the main light incident on the off-axis field of view on the imaging surface and the photosensitive chip, further improving the photosensitivity of the photosensitive chip, and then improving the resolution of the imaging, thereby ensuring the imaging quality. When f / RS6 is less than or equal to -2, the curvature radius of the image side of the third lens at the optical axis is easily too small, and the image side of the third lens is too curved, which is not conducive to the processing of the image side of the third lens; when f / RS6 is greater than or equal to -0.5, the image side of the third lens is too smooth, which makes it difficult to suppress the incident angle of the main light in the off-axis field of view, and is not conducive to ensuring the imaging quality.

[0109] In an exemplary embodiment, the optical lens satisfies the following relationship: -2<f3 / RS6<-0.5; wherein f3 represents the effective focal length of the third lens, and RS6 represents the radius of curvature of the image side surface of the third lens at the optical axis. f3 / RS6 can be -1.95, -1.9, -1.85, -1.8, -1.6, -1.4, -1.2, -1, -0.8, or -0.6. Under the condition that the above relationship is satisfied, the effective focal length of the third lens and the radius of curvature of the image side surface of the third lens at the optical axis can be reasonably configured, which is beneficial for correcting the distortion of the paraxial area on the imaging surface of the optical lens and improving the imaging quality. At the same time, the positive refractive power provided by the third lens is also beneficial for miniaturization of the lens. When f3 / RS6 is less than or equal to -2, the curvature radius of the image side of the third lens at the optical axis is easily too small, and the image side of the third lens is too curved, which is not conducive to the processing of the image side of the third lens and increases the difficulty of the lens processing technology; and when f3 / RS6 is greater than or equal to -0.5, the refractive power of the third lens is easily too strong, which is not conducive to correcting lens distortion.

[0110] In an exemplary embodiment, the optical lens satisfies the following relationship: 1.5<f / EPD<2.5; wherein f represents the effective focal length of the optical lens, and EPD represents the entrance pupil diameter of the optical lens. f / EPD can be 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3 or 2.4. Under the condition that the above relationship is satisfied, the effective focal length of the optical lens and the entrance pupil diameter of the optical lens can be reasonably configured, which is conducive to making the lens have a larger aperture and a smaller total length, while also ensuring the wide-angle characteristics of the lens, thereby achieving a high-definition wide-angle shooting effect. When f / EPD is greater than or equal to 2.5, it is easy to cause the aperture of the lens to be smaller, which is not conducive to obtaining sufficient light input in a darker shooting environment, resulting in reduced image brightness and low imaging quality. When f / EPD is less than or equal to 1.5, it is more difficult to take into account both the wide-angle and miniaturization characteristics of the lens.

[0111] In an exemplary embodiment, the optical lens satisfies the following relationship:

[0112] (C65+C54+C43+C32+C21) / 5<0.3mm; wherein C21 represents the difference between the maximum effective semi-diameter of the second lens objective side and the maximum effective semi-diameter of the first lens objective side, C32 represents the difference between the maximum effective semi-diameter of the third lens objective side and the maximum effective semi-diameter of the second lens objective side, C43 represents the difference between the maximum effective semi-diameter of the fourth lens objective side and the maximum effective semi-diameter of the third lens objective side, C54 represents the difference between the maximum effective semi-diameter of the fifth lens objective side and the maximum effective semi-diameter of the fourth lens objective side, and C65 represents the difference between the maximum effective semi-diameter of the sixth lens objective side and the maximum effective semi-diameter of the fifth lens objective side. (C65+C54+C43+C32+C21) / 5 can be 0.1mm, 0.13mm, 0.16mm, 0.19mm, 0.22mm, 0.25mm, or 0.28mm. When the above relationship is satisfied, the average difference in the maximum effective apertures of adjacent lenses on the objective side can be reasonably configured, thereby promoting a smooth transition of light between the lenses, reducing stray light, and lowering the probability of ghosting. However, when (C65+C54+C43+C32+C21) / 5 is greater than or equal to 0.3mm, the average difference in the maximum effective apertures of adjacent lenses on the objective side is too large, which can easily lead to excessive light deflection angles between the lenses, increasing the probability of ghosting and reducing the lens' imaging quality.

[0113] In an exemplary embodiment, the optical lens satisfies the following relationship: 3.5 < f12 / EPD < 10; where f12 represents the combined focal length of the first and second lenses, and EPD represents the entrance pupil diameter of the optical lens. f12 / EPD can be 4, 4.5, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, or 9.5. Under the condition that the above relationship is satisfied, the combined focal length of the first and second lenses and the entrance pupil diameter of the optical lens can be reasonably configured, thereby reducing aberrations in the peripheral field of view while shortening the overall length of the lens, further improving imaging quality. However, when f12 / EPD is less than or equal to 3.5, the combined refractive power of the first and second lenses is too strong, which is not conducive to correcting peripheral field aberrations. When f12 / EPD is greater than or equal to 10, the entrance pupil diameter of the optical lens is too small, resulting in insufficient light flux during shooting, which leads to reduced imaging quality.

[0114] In an exemplary embodiment, the optical lens satisfies the following relationship:

[0115] 1.5<f3456 / EPD<4.5; where f3456 represents the combined focal length of the third, fourth, fifth, and sixth lenses, and EPD represents the entrance pupil diameter of the optical lens. f3456 / EPD can be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 3, 3.3, 3.6, 3.9, or 4.2. When this relationship is satisfied, the ratio of the combined focal length of the third, fourth, fifth, and sixth lenses to the entrance pupil diameter of the optical lens falls within a reasonable range. This helps to further shorten the overall lens length while ensuring sufficient light intake. It also balances the aberrations among the third, fourth, fifth, and sixth lenses, resulting in better imaging quality. When f3456 / EPD is greater than or equal to 4.5, the entrance pupil diameter of the optical lens is too small, and the luminous flux of the lens is insufficient during shooting, resulting in a decrease in image quality; when f3456 / EPD is less than or equal to 1.5, the overall refractive power of the rear lens group is too strong, which is not conducive to balancing aberrations.

[0116] In an exemplary embodiment, the optical lens satisfies the following relationship: 0.5 < f12 / f3456 < 4.5; where f12 represents the combined focal length of the first and second lenses, and f3456 represents the combined focal length of the third, fourth, fifth, and sixth lenses. f12 / f3456 can be 1, 1.3, 1.6, 1.9, 2.2, 2.5, 2.8, 3.1, 3.4, 3.7, 4, or 4.3. Under the condition that the above relationship is satisfied, the combined focal length of the first and second lenses and the combined focal lengths of the third, fourth, fifth, and sixth lenses can be reasonably distributed, thereby balancing the sensitivity of each lens and further reducing the overall length of the lens to ensure miniaturization. When f12 / f3456 is less than or equal to 0.5, the combined focal length of the first lens and the second lens is too small, resulting in an excessively large overall refractive power of the front lens group, which is not conducive to reducing the sensitivity of the lens; and when f12 / f3456 is greater than or equal to 4.5, it is easy to cause the overall refractive power of the rear lens group to be too large, which is also not conducive to reducing the sensitivity of the lens.

[0117] In an exemplary embodiment, the optical lens satisfies the following relationship: 1.5<f12 / f<5.5; wherein f12 represents the combined focal length of the first lens and the second lens, and f represents the effective focal length of the optical lens. f12 / f can be 1.6, 1.8, 2, 2.4, 2.8, 3.2, 3.6, 4, 4.4, 4.8 or 5.2. Under the condition that the above relationship is satisfied, the combined focal length of the first lens and the second lens and the effective focal length of the optical lens can be reasonably configured, which is beneficial to improving the field curvature and distortion of the optical lens, reducing the difficulty of lens molding and processing, and also beneficial to shortening the total length of the lens and achieving miniaturization. However, when f12 / f is less than or equal to 1.5, the overall refractive power of the first lens and the second lens is too strong, which is not conducive to correcting aberrations and reducing the difficulty of lens processing; and when f12 / f is greater than or equal to 5.5, the combined focal length of the first lens and the second lens is too large, resulting in the overall refractive power of the first lens and the second lens being too small, and the purpose of aberration correction cannot be achieved.

[0118] In an exemplary embodiment, the optical lens satisfies the following relationship: 1 < f3456 / f < 2; where f3456 represents the combined focal length of the third, fourth, fifth, and sixth lenses, and f represents the effective focal length of the optical lens. f3456 / f can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, or 1.9. When this relationship is satisfied, the combined focal length of the third, fourth, fifth, and sixth lenses, as well as the effective focal length of the optical lens, can be appropriately configured, thereby facilitating correction of lens chromatic aberration and field curvature. It can also mitigate the deflection angle of light between adjacent lenses, reducing the sensitivity and molding difficulty of the lens. When f3456 / f is less than or equal to 1, the positive refractive power provided to the lens by the third, fourth, fifth and sixth lenses as a whole is too large, causing excessive light deflection between the lenses, which is not conducive to aberration correction and leads to reduced image quality; and when f3456 / f is greater than or equal to 2, the positive refractive power provided to the lens by the third, fourth, fifth and sixth lenses as a whole is too small, which makes it difficult to meet the requirements for lens aberration correction.

[0119] In an exemplary embodiment, the optical lens satisfies the following relationship:

[0120] 0<SAG12 / SAG22<75; wherein, SAG12 represents the distance from the intersection of the image side surface of the first lens and the optical axis to the maximum effective aperture of the image side surface of the first lens in the direction of the optical axis, and SAG22 represents the distance from the intersection of the image side surface of the second lens and the optical axis to the maximum effective aperture of the image side surface of the second lens in the direction of the optical axis. SAG12 / SAG22 can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 28, 48, 68 or 73. Under the condition that the above relationship is satisfied, the image side sag of the first lens and the image side sag of the second lens can be reasonably configured, which is conducive to correcting lens aberrations. At the same time, the curvature of the lens can be controlled within a reasonable range, reducing the difficulty of lens processing and molding. When SAG12 / SAG22 is greater than or equal to 75, the image side surface of the second lens is too smooth, which is not conducive to correcting aberrations.

[0121] In an exemplary embodiment, the optical lens satisfies the following relationship: -5.5<SAG41 / SAG42<-1; wherein SAG41 represents the distance from the intersection of the object side surface of the fourth lens and the optical axis to the maximum effective aperture of the object side surface of the fourth lens in the direction of the optical axis, and SAG42 represents the distance from the intersection of the image side surface of the fourth lens and the optical axis to the maximum effective aperture of the image side surface of the fourth lens in the direction of the optical axis. SAG41 / SAG42 can be -5, -4.6, -4.2, -3.8, -3.4, -3, -2.6, -2.2, -1.8, -1.4 or -1.1. Under the condition that the above relationship is satisfied, the object side sag of the fourth lens and the image side sag of the fourth lens can be reasonably configured, which is beneficial to correcting the spherical aberration and chromatic aberration generated by the front lens of the lens, and at the same time can reduce the degree of deflection of light on the object side surface and image side surface of the fourth lens, thereby reducing the overall sensitivity of the optical lens. When SAG41 / SAG42 is less than or equal to -5.5 or greater than or equal to -1, the curvature of the object side and the image side of the fourth lens is quite different, which may easily lead to excessive deflection of light, which is not conducive to balancing aberrations and will also increase the difficulty of lens processing and assembly.

[0122] In an exemplary embodiment, the optical lens satisfies the following relationship: -1<SAG61 / SAG62<0; wherein SAG61 represents the distance along the optical axis from the intersection of the object-side surface of the sixth lens element and the optical axis to the maximum effective aperture of the object-side surface of the sixth lens element, and SAG62 represents the distance along the optical axis from the intersection of the image-side surface of the sixth lens element and the optical axis to the maximum effective aperture of the image-side surface of the sixth lens element. SAG61 / SAG62 can be -0.98, -0.9, -0.8, -0.7, -0.6, -0.5, -0.4, -0.3, -0.2, -0.1, -0.05, or -0.01. Under the condition that the above relationship is satisfied, the object-side sag height of the sixth lens element and the image-side sag height of the sixth lens element can be reasonably configured, thereby helping to suppress the incident angle of the chief ray in the off-axis field of view on the lens imaging plane, ensuring better matching with the photosensitive chip, thereby enhancing the photosensitive performance of the photosensitive chip, ensuring the illumination of the edge field of view, improving the lens resolution, and enhancing the imaging quality. It also helps to reduce the rear end size of the lens and ensure miniaturization. However, when SAG61 / SAG62 is less than or equal to -1, the curvature of the object-side and image-side surfaces of the sixth lens element differs significantly, which is not conducive to lens processing and assembly.

[0123] In an exemplary embodiment, the optical lens satisfies the following relationship:

[0124] 0.5<(SAG61-SAG62) / (SAG41-SAG42)<2.5; wherein SAG41 represents the distance from the intersection of the object-side surface of the fourth lens and the optical axis to the maximum effective aperture of the object-side surface of the fourth lens in the optical axis direction, SAG42 represents the distance from the intersection of the image-side surface of the fourth lens and the optical axis to the maximum effective aperture of the image-side surface of the fourth lens in the optical axis direction, SAG61 represents the distance from the intersection of the object-side surface of the sixth lens and the optical axis to the maximum effective aperture of the object-side surface of the sixth lens in the optical axis direction, and SAG62 represents the distance from the intersection of the image-side surface of the sixth lens and the optical axis to the maximum effective aperture of the image-side surface of the sixth lens in the optical axis direction. (SAG61-SAG62) / (SAG41-SAG42) can be 0.8, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0 or 2.4. Under the condition that the above relationship is satisfied, the object-side and image-side sag heights of the fourth and sixth lenses can be reasonably configured, thereby preventing the fourth and sixth lenses from overbending, reducing the difficulty of lens processing, and also improving the stability of lens assembly. However, when (SAG61-SAG62) / (SAG41-SAG42) is less than or equal to 0.5 or greater than or equal to 2.5, the fourth or sixth lens is likely to overbend, further increasing the difficulty of lens processing and reducing production yield.

[0125] In an exemplary embodiment, the optical lens satisfies the following relationship: -5<RS9 / f5<-1; wherein RS9 represents the radius of curvature of the object side of the fifth lens at the optical axis, and f5 represents the effective focal length of the fifth lens. RS9 / f5 can be -4.6, -4.2, -3.8, -3.4, -3, -2.6, -2.2, -1.8, -1.4 or -1.2. Under the condition that the above relationship is satisfied, the radius of curvature of the object side of the fifth lens at the optical axis and the effective focal length of the fifth lens can be reasonably configured, which is beneficial to prevent the edge field of view light from being deflected too much at the object side of the fifth lens, thereby reducing the sensitivity of the optical lens. When RS9 / f5 is less than or equal to -5, it is easy to cause the refractive power of the fifth lens to be too strong, resulting in a large deflection angle of the light at the object side of the fifth lens; and when RS9 / f5 is greater than or equal to -1, it is easy to cause the inclination angle at the edge of the object side of the fifth lens to be too large, thereby causing stray light to be generated and increasing the probability of ghosting.

[0126] In an exemplary embodiment, a filter is disposed between the sixth lens and the imaging surface of the optical lens to filter out light outside the operating wavelength band, thereby preventing false colors or moire caused by interference from non-operating wavelengths and avoiding color distortion in the image. Specifically, the filter can be an infrared filter made of glass.

[0127] In an exemplary embodiment, the material of each lens in the optical lens can be glass or plastic. Plastic lenses can reduce the weight of the optical lens and lower production costs, while glass lenses can provide the optical lens with better temperature tolerance and excellent optical performance. Furthermore, when the optical lens is used in electronic devices such as mobile phones and tablets, the material of each lens is preferably plastic to enable the electronic devices to meet the development needs of lightweight and thin electronic devices. It should be noted that the material of each lens in the optical lens can also be any combination of glass and plastic, and does not have to be glass or plastic.

[0128] In an exemplary embodiment, the optical lens may further include a protective glass. This protective glass is located on the image side of the sixth lens element or the image side of the filter to protect the photosensitive element and prevent dust from contaminating the photosensitive element, further ensuring image quality. It should be noted that when the optical lens is used in electronic devices such as mobile phones and tablets, the protective glass may not be provided to further reduce the weight of the electronic device.

[0129] The optical lens of the above embodiment of the present application may adopt multiple lenses, such as the six lenses described above. By reasonably allocating the focal length, refractive power, surface shape, thickness of each lens and the on-axis spacing between each lens, it is possible to ensure that the total length of the above optical lens is small, the weight is light and it has a high imaging resolution, while also having a large aperture (FNO can be 1.75) and a large field of view, so as to better meet the application requirements of lightweight electronic devices such as mobile phones and tablets. However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in this application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification.

[0130] Specific embodiments of the optical lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0131] Example 1

[0132] The following reference Figures 1 to 2 The optical lens 100 according to the first embodiment of the present application is described.

[0133] Figure 1 FIG. 1 shows a schematic structural diagram of the optical lens 100 of Example 1. Figure 1 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0134] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is convex at the optical axis and concave at the circumference, and the image-side surface S2 is concave at the optical axis and convex at the circumference.

[0135] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0136] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is convex at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0137] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and convex at the circumference, and the image-side surface S8 is concave at the optical axis and convex at the circumference.

[0138] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0139] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and convex at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0140] Setting the object-side surfaces and image-side surfaces of the first lens L1 to the sixth lens L6 as aspherical surfaces is beneficial for correcting aberrations and solving the problem of image distortion. It also enables the lenses to achieve excellent optical imaging effects while being smaller, thinner, and flatter, thereby making the optical lens 100 miniaturized.

[0141] The first lens L1 to the sixth lens L6 are all made of plastic. Using lenses made of plastic can reduce the weight of the optical lens 100 and lower the production cost.

[0142] The object side of the optical lens 100 is also provided with a stop STO to limit the size of the incident light beam, thereby further improving the imaging quality of the optical lens 100. The optical lens 100 also includes a filter 110 provided on the image side of the sixth lens L6 and having an object side surface S13 and an image side surface S14. The light from the object OBJ passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15. The filter 110 is used to filter out light in non-working bands, thereby preventing the generation of false colors or ripples due to interference from light in non-working bands, and avoiding color distortion of the imaging. Specifically, the filter 110 is an infrared filter made of glass.

[0143] Table 1 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of the lens of the optical lens 100 of Example 1, wherein the units of the radius of curvature, thickness, and effective focal length of the lens are all in millimeters (mm). In addition, taking the first lens L1 as an example, the first value in the "Thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis, and the second value is the distance from the image side of the lens to the object side of the next lens in the image side direction on the optical axis; the value of the aperture ST0 in the "Thickness" parameter column is the distance from the aperture ST0 to the vertex of the object side of the next lens (the vertex refers to the intersection of the lens surface and the optical axis) on the optical axis. We assume that the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When the value is negative, it indicates that the aperture ST0 is set at Figure 1 The aperture is on the right side of the object side vertex of the lens. If the thickness of the aperture stop STO is a positive value, the aperture stop is on the left side of the object side vertex of the lens.

[0144] Table 1

[0145]

[0146]

[0147] The aspheric surface shape in a lens is defined by the following formula:

[0148]

[0149] Where x is the distance vector from the vertex of the aspheric surface at a height h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., paraxial curvature c is the reciprocal of the curvature radius R in Table 1); k is the conic coefficient; and Ai is the i-th order coefficient of the aspheric surface. Table 2 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspheric surfaces S1-S12 of the lens in Example 1.

[0150] Table 2

[0151]

[0152]

[0153] Half the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical lens 100 is 2.3 mm. Combining the data in Table 1 and Table 2, it can be seen that the optical lens 100 in Example 1 meets the following requirements:

[0154] TTL / tan(HFOV)=2.97 mm, where TTL represents the distance on the optical axis from the object-side surface S1 of the first lens L1 to the imaging surface S15 of the optical lens 100, and HFOV represents half of the diagonal field of view of the optical lens 100.

[0155] TTL / ∑AT=8.03, where ∑AT represents the sum of the distances along the optical axis from the image-side surface of the preceding lens to the object-side surface of the succeeding lens among the first lens L1 to the sixth lens L6;

[0156] RS3 / f=0.718, where RS3 represents the radius of curvature of the object-side surface S3 of the second lens element L2 at the optical axis, and f represents the effective focal length of the optical lens element 100;

[0157] TTL / ImgH=1.5, where ImgH represents half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens 100;

[0158] f / RS6=−1.056, where f represents the effective focal length of the optical lens 100, and RS6 represents the radius of curvature of the image-side surface S6 of the third lens element L3 at the optical axis;

[0159] f3 / RS6=-1.232, where f3 represents the effective focal length of the third lens element L3, and RS6 represents the radius of curvature of the image-side surface S6 of the third lens element L3 at the optical axis.

[0160] f / EPD=1.744, where f represents the effective focal length of the optical lens 100 and EPD represents the entrance pupil diameter of the optical lens 100;

[0161] (C65+C54+C43+C32+C21) / 5=0.174mm, where C21 represents the difference between the maximum effective semi-aperture of the object-side surface S3 of the second lens element L2 and the maximum effective semi-aperture of the object-side surface S1 of the first lens element L1; C32 represents the difference between the maximum effective semi-aperture of the object-side surface S5 of the third lens element L3 and the maximum effective semi-aperture of the object-side surface S3 of the second lens element L2; C43 represents the difference between the maximum effective semi-aperture of the object-side surface S7 of the fourth lens element L4 and the maximum effective semi-aperture of the object-side surface S5 of the third lens element L3; C54 represents the difference between the maximum effective semi-aperture of the object-side surface S9 of the fifth lens element L5 and the maximum effective semi-aperture of the object-side surface S7 of the fourth lens element L4; and C65 represents the difference between the maximum effective semi-aperture of the object-side surface S11 of the sixth lens element L6 and the maximum effective semi-aperture of the object-side surface S9 of the fifth lens element L5.

[0162] f12 / EPD=5.159, where f12 represents the combined focal length of the first lens L1 and the second lens L2, and EPD represents the entrance pupil diameter of the optical lens 100;

[0163] f3456 / EPD=2.193, where f3456 represents the combined focal length of the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6, and EPD represents the entrance pupil diameter of the optical lens 100;

[0164] f12 / f3456=2.352, where f12 represents the combined focal length of first lens L1 and second lens L2, and f3456 represents the combined focal length of third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6;

[0165] f12 / f=2.959, where f12 represents the combined focal length of the first lens L1 and the second lens L2, and f represents the effective focal length of the optical lens 100;

[0166] f3456 / f=1.258, where f3456 represents the combined focal length of the third lens element L3, the fourth lens element L4, the fifth lens element L5, and the sixth lens element L6, and f represents the effective focal length of the optical lens 100;

[0167] SAG12 / SAG22=4.2, where SAG12 represents the distance along the optical axis from the intersection of the image-side surface S2 of the first lens L1 and the optical axis to the maximum effective aperture of the image-side surface S2 of the first lens L1. SAG22 represents the distance along the optical axis from the intersection of the image-side surface S4 of the second lens L2 and the optical axis to the maximum effective aperture of the image-side surface S4 of the second lens L2.

[0168] SAG41 / SAG42=-4.834, where SAG41 represents the distance along the optical axis from the intersection of the object-side surface S7 of the fourth lens L4 and the optical axis to the maximum effective aperture of the object-side surface S7 of the fourth lens L4; SAG42 represents the distance along the optical axis from the intersection of the image-side surface S8 of the fourth lens L4 and the optical axis to the maximum effective aperture of the image-side surface S8 of the fourth lens L4;

[0169] SAG61 / SAG62=-0.221, where SAG61 represents the distance along the optical axis from the intersection of the object-side surface S11 of the sixth lens L6 and the optical axis to the maximum effective aperture of the object-side surface S11 of the sixth lens L6; SAG62 represents the distance along the optical axis from the intersection of the image-side surface S12 of the sixth lens L6 and the optical axis to the maximum effective aperture of the image-side surface S12 of the sixth lens L6;

[0170] (SAG61-SAG62) / (SAG41-SAG42)=1.853, where SAG41 represents the distance along the optical axis from the intersection of the object-side surface S7 of the fourth lens L4 and the optical axis to the maximum effective aperture of the object-side surface S7 of the fourth lens L4; SAG42 represents the distance along the optical axis from the intersection of the image-side surface S8 of the fourth lens L4 and the optical axis to the maximum effective aperture of the image-side surface S8 of the fourth lens L4; SAG61 represents the distance along the optical axis from the intersection of the object-side surface S11 of the sixth lens L6 and the optical axis to the maximum effective aperture of the object-side surface S11 of the sixth lens L6; and SAG62 represents the distance along the optical axis from the intersection of the image-side surface S12 of the sixth lens L6 and the optical axis to the maximum effective aperture of the image-side surface S12 of the sixth lens L6.

[0171] RS9 / f5=−3.341, where RS9 represents the radius of curvature of the object-side surface S9 of the fifth lens element L5 at the optical axis, and f5 represents the effective focal length of the fifth lens element L5.

[0172] Figure 2 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 1 are shown respectively. The reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 2 It can be seen that the optical lens 100 provided in Example 1 can achieve good imaging quality.

[0173] Example 2

[0174] The following reference Figures 3 and 4 The optical lens 100 according to Example 2 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 3 A schematic structural diagram of an optical lens 100 according to embodiment 2 of the present application is shown.

[0175] like Figure 3 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0176] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is convex at the optical axis and concave at the circumference, and the image-side surface S2 is concave at the optical axis and concave at the circumference.

[0177] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0178] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is convex at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0179] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and convex at the circumference, and the image-side surface S8 is concave at the optical axis and convex at the circumference.

[0180] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0181] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and convex at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0182] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0183] Table 3 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 2, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 4 shows the high-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 2, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 5 shows the relevant parameter values ​​of the optical lens 100 given in Example 2.

[0184] Table 3

[0185]

[0186]

[0187] Table 4

[0188]

[0189]

[0190] Table 5

[0191]

[0192] Figure 4 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 2 are shown respectively, and the reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. According to Figure 4 It can be seen that the optical lens 100 provided in Example 2 can achieve good imaging quality.

[0193] Example 3

[0194] The following reference Figures 5 and 6 The optical lens 100 according to Example 3 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 5 A schematic structural diagram of an optical lens 100 according to embodiment 3 of the present application is shown.

[0195] like Figure 5 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0196] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is convex at the optical axis and concave at the circumference, and the image-side surface S2 is concave at the optical axis and convex at the circumference.

[0197] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0198] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is convex at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0199] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and convex at the circumference, and the image-side surface S8 is concave at the optical axis and convex at the circumference.

[0200] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0201] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and convex at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0202] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0203] Table 6 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 3, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 7 shows the high-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 3, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 8 shows the relevant parameter values ​​of the optical lens 100 given in Example 3.

[0204] Table 6

[0205]

[0206] Table 7

[0207]

[0208]

[0209] Table 8

[0210]

[0211] Figure 6 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 3 are shown respectively. The reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 6 It can be seen that the optical lens 100 provided in Example 3 can achieve good imaging quality.

[0212] Example 4

[0213] The following reference Figures 7 and 8The optical lens 100 according to Example 4 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 7 A schematic structural diagram of an optical lens 100 according to Example 4 of the present application is shown.

[0214] like Figure 7 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0215] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is convex at the optical axis and concave at the circumference, and the image-side surface S2 is concave at the optical axis and convex at the circumference.

[0216] The second lens L2 has negative refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0217] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is convex at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0218] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is concave at the optical axis and convex at the circumference.

[0219] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0220] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and convex at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0221] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0222] Table 9 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 4, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 10 shows the high-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 4, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 11 shows the relevant parameter values ​​of the optical lens 100 given in Example 4.

[0223] Table 9

[0224]

[0225]

[0226] Table 10

[0227]

[0228]

[0229] Table 11

[0230]

[0231] Figure 8 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 4 are shown respectively. The reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 8 It can be seen that the optical lens 100 provided in Example 4 can achieve good imaging quality.

[0232] Example 5

[0233] The following reference Figures 9 and 10 The optical lens 100 according to Example 5 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 9 A schematic structural diagram of an optical lens 100 according to embodiment 5 of the present application is shown.

[0234] like Figure 9 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0235] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is convex at the optical axis and concave at the circumference, and the image-side surface S2 is concave at the optical axis and convex at the circumference.

[0236] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0237] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is convex at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0238] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and convex at the circumference, and the image-side surface S8 is concave at the optical axis and concave at the circumference.

[0239] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0240] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and concave at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0241] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0242] Table 12 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 5, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 13 shows the high-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 5, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 14 shows the relevant parameter values ​​of the optical lens 100 given in Example 5.

[0243] Table 12

[0244]

[0245]

[0246] Table 13

[0247]

[0248] Table 14

[0249]

[0250]

[0251] Figure 10 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 5 are shown respectively. The reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 10 It can be seen that the optical lens 100 provided in Example 5 can achieve good imaging quality.

[0252] Example 6

[0253] The following reference Figures 11 to 12 The optical lens 100 according to Example 6 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 11 A schematic structural diagram of the optical lens 100 according to Example 6 of the present application is shown.

[0254] like Figure 11 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0255] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is convex at the optical axis and concave at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0256] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0257] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is convex at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0258] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and convex at the circumference, and the image-side surface S8 is concave at the optical axis and convex at the circumference.

[0259] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0260] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and convex at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0261] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0262] Table 15 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 6, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 16 shows the high-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 6, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 17 shows the relevant parameter values ​​of the optical lens 100 given in Example 6.

[0263] Table 15

[0264]

[0265] Table 16

[0266]

[0267]

[0268] Table 17

[0269]

[0270] Figure 12 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 6 are shown respectively, and the reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 12 It can be seen that the optical lens 100 provided in Example 6 can achieve good imaging quality.

[0271] Example 7

[0272] The following reference Figures 13 and 14The optical lens 100 according to Example 7 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 13 A structural schematic diagram of the optical lens 100 according to Example 7 of the present application is shown.

[0273] like Figure 13 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0274] The first lens L1 has negative refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is concave at the optical axis and concave at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0275] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0276] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is convex at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0277] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and convex at the circumference, and the image-side surface S8 is concave at the optical axis and concave at the circumference.

[0278] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0279] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and convex at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0280] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0281] Table 18 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 7, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 19 shows the high-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 7, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 20 shows the relevant parameter values ​​of the optical lens 100 given in Example 7.

[0282] Table 18

[0283]

[0284]

[0285] Table 19

[0286]

[0287] Table 20

[0288]

[0289] Figure 14 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 7 are shown respectively. The reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 14 It can be seen that the optical lens 100 provided in Example 7 can achieve good imaging quality.

[0290] Example 8

[0291] The following reference Figures 15 and 16The optical lens 100 according to Example 8 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 15 A schematic structural diagram of the optical lens 100 according to Example 8 of the present application is shown.

[0292] like Figure 15 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0293] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is concave at the optical axis and concave at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0294] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0295] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is convex at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0296] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is convex at the optical axis and convex at the circumference, and the image-side surface S8 is concave at the optical axis and convex at the circumference.

[0297] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0298] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and convex at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0299] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0300] Table 21 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 8, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 22 shows the high-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 8, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 23 shows the relevant parameter values ​​of the optical lens 100 given in Example 8.

[0301] Table 21

[0302]

[0303] Table 22

[0304]

[0305]

[0306] Table 23

[0307]

[0308] Figure 16 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 8 are shown respectively. The reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 16 It can be seen that the optical lens 100 provided in Example 8 can achieve good imaging quality.

[0309] Example 9

[0310] The following reference Figures 17 and 18The optical lens 100 according to Example 9 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 17 A schematic structural diagram of the optical lens 100 according to Example 9 of the present application is shown.

[0311] like Figure 17 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0312] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is convex at the optical axis and concave at the circumference, and the image-side surface S2 is concave at the optical axis and convex at the circumference.

[0313] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is concave at the optical axis and convex at the circumference.

[0314] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is concave at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0315] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is concave at the optical axis and convex at the circumference.

[0316] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0317] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and concave at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0318] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0319] Table 24 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 9, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 25 shows the higher-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 9, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 26 shows the relevant parameter values ​​of the optical lens 100 given in Example 9.

[0320] Table 24

[0321]

[0322]

[0323] Table 25

[0324]

[0325]

[0326] Table 26

[0327]

[0328] Figure 18 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 9 are shown respectively, and the reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 18 It can be seen that the optical lens 100 provided in Example 9 can achieve good imaging quality.

[0329] Example 10

[0330] The following reference Figures 19 to 20 The optical lens 100 according to Example 10 of the present application is described. In this embodiment, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 19 A schematic structural diagram of an optical lens 100 according to embodiment 10 of the present application is shown.

[0331] like Figure 19 As shown, the optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an imaging surface S15.

[0332] The first lens L1 has positive refractive power, and its object-side surface S1 and image-side surface S2 are both aspherical surfaces. The object-side surface S1 is convex at the optical axis and concave at the circumference, and the image-side surface S2 is concave at the optical axis and convex at the circumference.

[0333] The second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both aspherical surfaces. The object-side surface S3 is convex at the optical axis and concave at the circumference, and the image-side surface S4 is convex at the optical axis and convex at the circumference.

[0334] The third lens L3 has positive refractive power, and its object-side surface S5 and image-side surface S6 are both aspherical surfaces. The object-side surface S5 is concave at the optical axis and convex at the circumference, and the image-side surface S6 is convex at the optical axis and concave at the circumference.

[0335] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces. The object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is concave at the optical axis and convex at the circumference.

[0336] The fifth lens L5 has positive refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces. The object-side surface S9 is concave at the optical axis and concave at the circumference, and the image-side surface S10 is convex at the optical axis and concave at the circumference.

[0337] The sixth lens L6 has negative refractive power, and its object-side surface S11 and image-side surface S12 are both aspherical surfaces. The object-side surface S11 is convex at the optical axis and concave at the circumference, and the image-side surface S12 is concave at the optical axis and convex at the circumference.

[0338] The object-side and image-side surfaces of the first to sixth lenses L1 to L6 are all aspherical. The materials of the first to sixth lenses L1 to L6 are all plastic. A stop STO is also provided on the object side of the optical lens 100 to limit the size of the incident light beam, further improving the imaging quality of the optical lens 100. The optical lens 100 also includes an infrared filter 110 provided on the image side of the sixth lens L6 and having an object-side surface S13 and an image-side surface S14. Light from the object OBJ passes through each surface S1 to S14 in sequence and is ultimately imaged on the imaging surface S15.

[0339] Table 27 shows the surface type, radius of curvature, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient) and effective focal length of each lens of the optical lens 100 of Example 10, wherein the units of the radius of curvature, thickness, and effective focal length of each lens are all in millimeters (mm); Table 28 shows the higher-order coefficients of the aspheric surfaces S1-S12 of the lenses that can be used in Example 10, wherein the aspheric surface shape can be defined by formula (1) given in Example 1; Table 29 shows the relevant parameter values ​​of the optical lens 100 given in Example 10.

[0340] Table 27

[0341]

[0342] Table 28

[0343]

[0344] Table 29

[0345]

[0346]

[0347] Figure 20 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical lens 100 of Example 10 are shown respectively, and the reference wavelength of the optical lens 100 is 555nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 435nm, 470nm, 510nm, 555nm, 610nm and 650nm after passing through the optical lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 555nm after passing through the optical lens 100; the distortion curve shows the distortion of light with a wavelength of 555nm at different image heights after passing through the optical lens 100. Figure 20 It can be seen that the optical lens 100 provided in Example 10 can achieve good imaging quality.

[0348] like Figure 21As shown, the present application also provides an imaging module 200, comprising the optical lens 100 as described above (eg Figure 1 and a photosensitive element 210, which is disposed on the image side of the optical lens 100. The photosensitive surface of the photosensitive element 210 coincides with the imaging surface S15. Specifically, the photosensitive element 210 can be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor.

[0349] The imaging module 200 utilizes the aforementioned optical lens 100 to capture images with high resolution and a wide viewing angle. Furthermore, the imaging module 200 features a compact and lightweight structure. The imaging module 200 can be used in fields such as mobile phones, automobiles, surveillance, and medical applications. Specifically, it can be used as a mobile phone camera, an in-vehicle camera, a surveillance camera, or an endoscope.

[0350] The present application also provides an electronic device comprising a housing and an imaging module 200 as described above, wherein the imaging module 200 is mounted on the housing. Specifically, the imaging module 200 is disposed within the housing and exposed from the housing to capture images. The housing can provide the imaging module 200 with protection against dust, water, and drop. The housing has a hole corresponding to the imaging module 200, allowing light to enter or exit the housing through the hole.

[0351] The electronic device, utilizing the aforementioned imaging module 200, can capture images with a wide viewing angle and high pixel count, thereby enhancing the user's photography experience. In other embodiments, the electronic device is further provided with a corresponding processing system. After capturing an image of an object, the electronic device can promptly transmit the image to the corresponding processing system for accurate analysis and judgment.

[0352] In some other embodiments, the "electronic device" used may also include, but is not limited to, a device configured to receive or send communication signals via a wired line connection and / or via a wireless interface. An electronic device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radiotelephones with data processing, fax and data communication capabilities; personal digital assistants (PDAs) that can include radiotelephones, pagers, Internet / Intranet access, web browsers, notepads, calendars and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers.

[0353] 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.

[0354] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An optical lens, characterized in that: There are six lenses with refractive power. The optical lens includes the following in order from the object side to the image side along the optical axis: a first lens having refractive power; a second lens having 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, wherein the image-side surface of the third lens element is convex near the optical axis; a fourth lens element having negative refractive power, wherein the image-side surface of the fourth lens element is concave near the optical axis; a fifth lens element having positive refractive power, wherein the object-side surface of the fifth lens element is concave near the optical axis and the image-side surface is convex near the optical axis; a sixth lens element having negative refractive power, wherein the object-side surface of the sixth lens element is convex near the optical axis and the image-side surface is concave near the optical axis; both the object-side surface and the image-side surface of the sixth lens element are aspherical, and at least one of the object-side surface and the image-side surface contains at least one inflection point; The optical lens satisfies the following relationship: 2mm<TTL / tan(HFOV)<3mm; TTL / ImgH≤1.5; 0.5<f12 / f3456<4.5; Wherein, TTL represents the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, HFOV represents half of the diagonal field of view angle of the optical lens, ImgH represents half of the diagonal length of the effective pixel area on the imaging surface of the optical lens, f12 represents the combined focal length of the first lens and the second lens, and f3456 represents the combined focal length of the third lens, the fourth lens, the fifth lens, and the sixth lens.

2. The optical lens according to claim 1, wherein: Among the first to sixth lenses, the object-side surface and the image-side surface of each lens are aspherical surfaces.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 6.573≤TTL / ∑AT<11; Wherein, ΣAT represents the sum of the distances on the optical axis from the image side surface of the preceding lens to the object side surface of the succeeding lens among the adjacent lenses from the first lens to the sixth lens.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 0.5<RS3 / f<3.5; Wherein, RS3 represents the curvature radius of the object side of the second lens at the optical axis, and f represents the effective focal length of the optical lens.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.372≤TTL / ImgH≤1.

5.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -2<f / RS6<-0.5; Wherein, f represents the effective focal length of the optical lens, and RS6 represents the curvature radius of the image side surface of the third lens at the optical axis.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -2<f3 / RS6<-0.5; Wherein, f3 represents the effective focal length of the third lens element, and RS6 represents the curvature radius of the image side surface of the third lens element at the optical axis.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.5<f / EPD<2.5; Wherein, f represents the effective focal length of the optical lens, and EPD represents the entrance pupil diameter of the optical lens.

9. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: (C65+C54+C43+C32+C21) / 5<0.3mm; Among them, C21 represents the difference between the maximum effective semi-aperture of the second lens objective side and the maximum effective semi-aperture of the first lens objective side, C32 represents the difference between the maximum effective semi-aperture of the third lens objective side and the maximum effective semi-aperture of the second lens objective side, C43 represents the difference between the maximum effective semi-aperture of the fourth lens objective side and the maximum effective semi-aperture of the third lens objective side, C54 represents the difference between the maximum effective semi-aperture of the fifth lens objective side and the maximum effective semi-aperture of the fourth lens objective side, and C65 represents the difference between the maximum effective semi-aperture of the sixth lens objective side and the maximum effective semi-aperture of the fifth lens objective side.

10. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 3.5<f12 / EPD<10; Wherein, f12 represents the combined focal length of the first lens and the second lens, and EPD represents the entrance pupil diameter of the optical lens.

11. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.5<f3456 / EPD<4.5; Wherein, f3456 represents the combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens, and EPD represents the entrance pupil diameter of the optical lens.

12. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.093<f12 / f3456<4.

5.

13. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.5<f12 / f<5.5; Wherein, f12 represents the combined focal length of the first lens and the second lens, and f represents the effective focal length of the optical lens.

14. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1<f3456 / f<2; Wherein, f3456 represents the combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens, and f represents the effective focal length of the optical lens.

15. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 0<SAG12 / SAG22<75; Among them, SAG12 represents the distance from the intersection of the image side surface of the first lens and the optical axis to the maximum effective aperture of the image side surface of the first lens in the direction of the optical axis, and SAG22 represents the distance from the intersection of the image side surface of the second lens and the optical axis to the maximum effective aperture of the image side surface of the second lens in the direction of the optical axis.

16. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -5.5<SAG41 / SAG42<-1; Among them, SAG41 represents the distance from the intersection of the object side surface of the fourth lens and the optical axis to the maximum effective aperture of the object side surface of the fourth lens in the direction of the optical axis, and SAG42 represents the distance from the intersection of the image side surface of the fourth lens and the optical axis to the maximum effective aperture of the image side surface of the fourth lens in the direction of the optical axis.

17. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -1<SAG61 / SAG62<0; Among them, SAG61 represents the distance from the intersection of the object side surface of the sixth lens and the optical axis to the maximum effective aperture of the object side surface of the sixth lens in the direction of the optical axis, and SAG62 represents the distance from the intersection of the image side surface of the sixth lens and the optical axis to the maximum effective aperture of the image side surface of the sixth lens in the direction of the optical axis.

18. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 0.5<(SAG61-SAG62) / (SAG41-SAG42)<2.5; Among them, SAG41 represents the distance from the intersection of the object side surface of the fourth lens and the optical axis to the maximum effective aperture of the object side surface of the fourth lens in the direction of the optical axis, SAG42 represents the distance from the intersection of the image side surface of the fourth lens and the optical axis to the maximum effective aperture of the image side surface of the fourth lens in the direction of the optical axis, SAG61 represents the distance from the intersection of the object side surface of the sixth lens and the optical axis to the maximum effective aperture of the object side surface of the sixth lens in the direction of the optical axis, and SAG62 represents the distance from the intersection of the image side surface of the sixth lens and the optical axis to the maximum effective aperture of the image side surface of the sixth lens in the direction of the optical axis.

19. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -5<RS9 / f5<-1; RS9 represents the curvature radius of the object side of the fifth lens at the optical axis, and f5 represents the effective focal length of the fifth lens.

20. An imaging module, characterized in that: It comprises the optical lens according to any one of claims 1 to 19 and a photosensitive element, wherein the photosensitive element is arranged on the image side of the optical lens.

21. An electronic device, characterized in that: It comprises a shell and the imaging module as claimed in claim 20, wherein the imaging module is mounted on the shell.

Images