Camera lenses, imaging modules and electronic equipment

Abstract

The present application relates to a camera lens, an imaging module and an electronic device. The camera lens includes, in order from the object side to the image side along the optical axis, a first lens with positive optical power, whose object side surface is convex near the optical axis; a second lens with optical power; a third lens with optical power; a fourth lens with negative optical power, whose object side surface is concave near the optical axis and whose image side surface is convex near the optical axis; a fifth lens with optical power, whose object side surface and image side surface at least one surface contains at least one inflection point. The above-mentioned camera lens can reduce the head diameter and improve the full-screen effect when meeting specific relationships, and can also reasonably increase the total length of the lens while ensuring imaging quality to meet the application requirements of electronic devices of different specifications.

Description

Technical Field

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

[0002] In recent years, portable electronic products such as smartphones with camera functions have undergone rapid innovation, with screen configurations such as waterdrop notches and notch screens emerging one after another. This has placed higher demands on the supporting camera lenses. Furthermore, the photosensitive elements of lens modules include charge coupled devices (CCDs) and complementary metal-oxide semiconductor sensors (CMOS sensors). With the development of CMOS chip technology, the pixel size of the chip has become smaller and smaller, and the image quality requirements of the corresponding lenses have also become increasingly higher.

[0003] The traditional method is to improve the imaging quality of the lens by stacking the number of lenses, but this makes it difficult to control the total length of the lens and easily causes the lens to become larger. When the number of lenses is small, not only is it difficult to ensure the imaging quality, but the total length of the lens is also relatively small, making it difficult to match electronic equipment of different specifications. Summary of the Invention

[0004] Based on this, it is necessary to provide an improved camera lens to address the problem that traditional camera lenses are difficult to control the total length of the lens while ensuring imaging quality to match electronic devices of different specifications.

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

[0006] a first lens having positive refractive power, wherein the object-side surface of the first lens is convex near the optical axis;

[0007] a second lens having optical power;

[0008] a third lens having optical power;

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

[0010] a fifth lens having optical power, wherein at least one of the object-side surface and the image-side surface of the fifth lens includes at least one inflection point;

[0011] The camera lens satisfies the following relationship:

[0012] 1.3<TTL / f<1.5; wherein TTL represents the distance from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis, and f represents the effective focal length of the camera lens.

[0013] The above-mentioned camera lens can enhance the imaging resolution capability of the lens and effectively correct aberrations to ensure image clarity by selecting an appropriate number of lenses and reasonably allocating the optical focal length and surface shape of each lens. At the same time, by satisfying the above-mentioned relationship, the total length of the lens can be effectively increased within a reasonable range while ensuring imaging quality, thereby meeting the application requirements of electronic equipment of different specifications.

[0014] In one embodiment, the camera lens satisfies the following relationship:

[0015] 0.18≤CT1 / TTL≤0.22; wherein CT1 represents the thickness of the first lens on the optical axis.

[0016] When the above relationship is met, the camera lens has a thicker first lens, which is conducive to moving the mechanical support position of the first lens fully toward the image side to deepen the embedding depth of the lens. It is also conducive to reducing the diameter of the lens head, optimizing the external structure of the lens, and improving the design effect of the full screen.

[0017] In one embodiment, the camera lens satisfies the following relationship:

[0018] (FOV / 2) / f>8deg / mm; wherein FOV represents the maximum field of view of the camera lens.

[0019] For chips of the same specifications, increasing the field of view angle usually results in a decrease in focal length. By satisfying the above relationship, it is beneficial to rationally configure the optical focal length, curvature radius, and thickness of each lens, thereby increasing the total length of the lens while ensuring the viewing angle, and meeting the specification requirements of a long-focal-length lens. However, when (FOV / 2) / f is below the lower limit, the effective focal length of the lens is too long, and increasing the field of view angle becomes difficult.

[0020] In one embodiment, the camera lens satisfies the following relationship:

[0021] TTL / ImgH≥1.57; wherein ImgH represents half of the diagonal length of the effective pixel area on the imaging surface of the camera lens.

[0022] By satisfying the above relationship, it is beneficial to reasonably increase the total length of the lens to match electronic devices of different specifications when matching chips of the same size.

[0023] In one embodiment, the camera lens satisfies the following relationship: -5<RS7 / CT4<-3; wherein RS7 represents the curvature radius of the object side of the fourth lens at the optical axis, and CT4 represents the thickness of the fourth lens on the optical axis.

[0024] When the above relationship is satisfied, it is beneficial to reasonably configure the radius of curvature of the object-side surface of the fourth lens at the optical axis and the center thickness of the fourth lens, thereby facilitating correction of lens spherical aberration and improving imaging quality.

[0025] In one embodiment, the camera lens satisfies the following relationship: 2.2≤FNO≤3; wherein FNO represents the aperture number of the camera lens.

[0026] When the above relationship is met, the aperture number of the lens can be reasonably configured, which is conducive to reducing the head diameter of the lens and meeting the appearance requirements of a small head.

[0027] In one embodiment, the camera lens satisfies the following relationship: f / f4>-0.5; wherein f4 represents the effective focal length of the fourth lens.

[0028] When the above relationship is satisfied, the fourth lens element can provide a small amount of negative optical power to the lens, thereby facilitating the correction of spherical aberration and suppressing excessive increase of distortion.

[0029] In one embodiment, the camera lens satisfies the following relationship:

[0030] 1<(RS3-RS4) / (RS3+RS4)<7; wherein RS3 represents the curvature radius of the object side surface of the second lens at the optical axis, and RS4 represents the curvature radius of the image side surface of the second lens at the optical axis.

[0031] When the above relationship is met, the second lens can provide negative optical focal length for the lens, expanding the field of view of the lens. At the same time, it is also beneficial to fully optimize the shape of the second lens, avoid excessive bending of the second lens, facilitate the processing and molding of the second lens, and improve production yield.

[0032] In one embodiment, the camera lens satisfies the following relationship: -5<f5 / f<-2; wherein f5 represents the effective focal length of the fifth lens.

[0033] When the above relationship is satisfied, the fifth lens element can provide negative optical power for the lens, thereby facilitating controlling the lens to have a longer back focal length, ensuring a sufficient focusing range, and improving image clarity.

[0034] In one embodiment, the camera lens satisfies the following relationship: 30<v1-v2<40; wherein v1 represents the Abbe number of the first lens in d-light, and v2 represents the Abbe number of the second lens in d-light.

[0035] When the above relationship is satisfied, the Abbe numbers of the first lens and the second lens can be reasonably configured, which is beneficial to correcting lens chromatic aberration and ensuring imaging quality.

[0036] This application also provides an imaging module.

[0037] An imaging module comprises the aforementioned camera lens and a photosensitive element, wherein the photosensitive element is arranged on the image side of the camera lens.

[0038] The above-mentioned imaging module can be matched with electronic devices of different specifications, and uses the aforementioned camera lens to facilitate the shooting of distant objects with high image clarity. In addition, the imaging module also has the characteristics of a small head and lightweight structure, which is convenient for adaptation to devices with limited size such as mobile phones, tablets and car lenses.

[0039] The present application also provides an electronic device.

[0040] An electronic device comprises a housing and the imaging module as described above, wherein the imaging module is mounted on the housing.

[0041] The above-mentioned electronic device, using the aforementioned imaging module, is conducive to the realization of a full screen and can clearly capture distant objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic structural diagram of the camera lens of Example 1 of the present application is shown;

[0043] Figure 2 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 1 are shown respectively;

[0044] Figure 3 A schematic structural diagram of a camera lens according to Example 2 of the present application is shown;

[0045] Figure 4 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 2 are shown respectively;

[0046] Figure 5 A schematic structural diagram of a camera lens according to Example 3 of the present application is shown;

[0047] Figure 6 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 3 are shown respectively;

[0048] Figure 7 A schematic structural diagram of a camera lens according to Example 4 of the present application is shown;

[0049] Figure 8 1. The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the imaging lens of Example 4 are shown respectively;

[0050] Figure 9 A schematic structural diagram of a camera lens according to Example 5 of the present application is shown;

[0051] Figure 10 Graphs showing the longitudinal spherical aberration, astigmatism, and distortion of the imaging lens of Example 5 are shown respectively;

[0052] Figure 11 A schematic structural diagram of a camera lens according to Example 6 of the present application is shown;

[0053] Figure 12 Graphs showing the longitudinal spherical aberration, astigmatism, and distortion of the imaging lens of Example 6 are shown respectively;

[0054] Figure 13 A schematic diagram of an imaging module according to an embodiment of the present application is shown;

[0055] Figure 14 A schematic diagram of an electronic device using an imaging module according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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:

[0062] 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 that is not on the optical axis, where a tangent line passing through the inflection point is perpendicular to the optical axis (i.e., the surface shapes on either side of the inflection point are opposite). 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 each inflection point. 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.

[0063] The features, principles and other aspects of the present application will be described in detail below.

[0064] Please also refer to Figure 1 、 Figure 3 、 Figure 5 、 Figure 7 、 Figure 9 and Figure 11 The present invention provides a small head camera lens with a long focal length and a long overall length, and the camera lens has a large field of view and a high imaging resolution. The camera lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in order from the first lens to the fifth lens along the optical axis from the object side to the image side, and the imaging surface of the camera lens is located on the image side of the fifth lens.

[0065] Specifically, the first lens has positive optical power, and its object-side surface near the optical axis is convex, which facilitates appropriate adjustment of the positive optical power intensity of the first lens so that light is effectively transmitted and converged to the imaging surface, ensuring imaging quality. It is also beneficial to control the total length of the lens system to reduce the lens volume.

[0066] The second lens has optical power. When the second lens has negative optical power, it is beneficial to balance the positive optical power of the first lens and effectively correct the aberration generated by the first lens.

[0067] The third lens has optical power. When the third lens has positive optical power, it can be properly configured with the first lens to have a positive optical power distribution of the lens, thereby helping to reduce the sensitivity of the camera lens and making the camera lens have more stable imaging quality and manufacturing yield.

[0068] The fourth lens element has negative optical power, with a concave surface on the object side near the optical axis and a convex surface on the image side near the optical axis. This helps balance the optical power of the front lens group and effectively corrects the aberrations of the camera lens, further improving image quality.

[0069] The fifth lens has an optical power. When the fifth lens has a negative optical power, it is beneficial to correct astigmatism and effectively suppress the angle of light incident on the imaging surface to improve the imaging quality of the edge field of view. The object side surface of the fifth lens is convex near the optical axis, which can effectively reduce aberrations and field curvature and improve the imaging quality; on the contrary, if the object side surface is set to a concave surface near the optical axis, it is not conducive to aberration correction. At least one surface of the object side surface and the image side surface of the fifth lens includes at least one inflection point. In this way, the shape change of the surface of the fifth lens can be adjusted, which helps to receive peripheral light to avoid stray light caused by excessively large incident angles of light, and at the same time helps to suppress the angle of off-axis field light incident on the imaging surface to ensure the illumination of the edge field of view, further improving the imaging quality.

[0070] The camera lens is also provided with an aperture stop to better control the size of the incident light beam and improve the imaging quality of the camera lens. Furthermore, the aperture stop is provided on the object side of the first lens. Specifically, the aperture stop includes an aperture stop and a field stop. Preferably, the aperture stop is an aperture stop. The aperture stop can be located on the surface of the lens (e.g., 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 stop 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 stop on the surface.

[0071] Specifically, the camera lens satisfies the following relationship: 1.3<TTL / f<1.5; wherein TTL represents the distance from the object side of the first lens to the imaging plane of the camera lens on the optical axis, and f represents the effective focal length of the camera lens. TTL / f can be 1.31, 1.32, 1.35, 1.37, 1.39, 1.41, 1.43, 1.45 or 1.47. When the above relationship is met, the total length of the lens can be reasonably increased while ensuring the imaging quality to meet the application requirements of electronic devices of different specifications. When TTL / f is lower than the lower limit, the total length of the lens is small, which is not conducive to adapting to electronic devices of different specifications, and the effective focal length is too large, which is not conducive to increasing the lens angle of view; and when TTL / f is higher than the upper limit, the total length of the lens is too long and cannot meet the requirements of miniaturization.

[0072] When the above-mentioned camera lens is used for imaging, the light emitted or reflected by the subject enters the camera lens from the object side, passes through the first lens, the second lens, the third lens, the fourth lens and the fifth lens in sequence, and finally converges on the imaging surface.

[0073] The above-mentioned camera 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 optical power, surface shape and effective focal length of each lens, thereby improving the lens resolution and ensuring image clarity. At the same time, by satisfying the above-mentioned relationship, the total length of the lens can be effectively increased while ensuring imaging quality, so as to meet the application requirements of electronic equipment of different specifications.

[0074] In an exemplary embodiment, the object-side surface and / or image-side surface of at least one of the first through fifth lenses is aspherical. This approach improves the flexibility of lens design, effectively corrects aberrations, and enhances the imaging quality of the camera lens. Specifically, both the object-side surface and the image-side surface of the first through fifth lenses are aspherical, thereby better correcting aberrations generated during light transmission. It should be noted that the surfaces of each lens in the camera lens may also be any combination of spherical and aspherical surfaces, and this application does not impose any restrictions thereon.

[0075] In an exemplary embodiment, the camera lens satisfies the following relationship: 0.18 ≤ CT1 / TTL ≤ 0.22; where CT1 represents the thickness of the first lens on the optical axis. CT1 / TTL can be 0.18, 0.19, 0.192, 0.194, 0.196, 0.198, 0.2, 0.202, 0.206, or 0.208. When the above relationship is satisfied, the camera lens has a thicker first lens, which facilitates moving the mechanical support position of the first lens sufficiently toward the image side to deepen the lens's embedding depth. This also facilitates reducing the lens head diameter, optimizing the lens's external structure, and enhancing the full-screen design. When CT1 / TTL exceeds the upper limit, the first lens is too thick, resulting in a small spacing between lenses, which is not conducive to lens assembly. When CT1 / TTL is below the lower limit, it is not conducive to controlling the overall length and easily leads to an enlarged lens.

[0076] Furthermore, the camera lens meets the following requirements: 0.19<CT1 / TTL<0.21, which helps to better strike a balance between increasing depth, achieving a small head, and controlling the total length of the lens.

[0077] In an exemplary embodiment, the camera lens satisfies the following relationship: (FOV / 2) / f > 8 degrees / mm; where FOV represents the maximum field of view of the camera lens. (FOV / 2) / f can be 9, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, or 14, expressed in degrees / mm. For chips of the same specification, increasing the field of view typically results in a shorter focal length. Satisfying this relationship facilitates the proper configuration of the focal power, radius of curvature, and thickness of each lens, thereby increasing the overall lens length while maintaining the desired viewing angle, thus meeting the specifications of a telephoto lens. However, when (FOV / 2) / f falls below the lower limit, the effective focal length of the lens becomes excessively long, making it difficult to increase the field of view.

[0078] Furthermore, the camera lens satisfies: (FOV / 2) / f>10deg / mm, which helps to better strike a balance between ensuring the viewing angle and increasing the focal length of the lens.

[0079] In an exemplary embodiment, the camera lens satisfies the following relationship: TTL / ImgH ≥ 1.57; where ImgH represents half the diagonal length of the effective pixel area on the imaging plane of the camera lens. TTL / ImgH can be 1.57, 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, or 1.7. Meeting this relationship facilitates reasonably increasing the overall lens length to accommodate electronic devices of different specifications when matching chips of the same size. However, when TTL / ImgH falls below the lower limit, the overall lens length is too short for a given chip size, making it difficult to match electronic devices of different specifications.

[0080] In an exemplary embodiment, the camera lens satisfies the following relationship: -5<RS7 / CT4<-3; wherein RS7 represents the radius of curvature of the object side of the fourth lens at the optical axis, and CT4 represents the thickness of the fourth lens on the optical axis. RS7 / CT4 can be -4.8, -4.4, -4.0, -3.8, -3.6, -3.4 or -3.2. When the above relationship is met, it is beneficial to reasonably configure the radius of curvature of the object side of the fourth lens at the optical axis and the center thickness of the fourth lens, which is beneficial to correct the spherical aberration of the lens and improve the imaging quality. When RS7 / CT4 exceeds the upper limit, it is easy to cause the fourth lens to be too bent or too thick, which is not conducive to the molding and assembly of the lens, nor is it conducive to the control of the total length of the lens; and when RS7 / CT4 is lower than the lower limit, it is easy to cause the fourth lens to be too thin and the object side to be too flat, which is not conducive to correcting the spherical aberration of the lens and it is difficult to ensure the imaging quality.

[0081] In an exemplary embodiment, the camera lens satisfies the following relationship: 2.2 ≤ FNO ≤ 3; where FNO represents the aperture number of the camera lens. FNO can be 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, or 3.0. When this relationship is met, the lens aperture can be appropriately configured, thereby facilitating a reduction in lens head diameter and meeting the requirements for a small-head design. However, when the FNO exceeds an upper limit, the lens aperture is smaller, resulting in less light entering the lens and weaker illumination at the edges of the field of view, making it difficult to maintain image quality. When the FNO falls below a lower limit, it is difficult to reduce the lens head diameter, making it difficult to meet the requirements for a small-head design.

[0082] In an exemplary embodiment, the camera lens satisfies the following relationship: f / f4 > -0.5; where f4 represents the effective focal length of the fourth lens element. f / f4 can be -0.3, -0.25, -0.2, -0.15, -0.1, -0.05, -0.03, -0.02, -0.01, or -0.005. When this relationship is satisfied, the fourth lens element can provide a small amount of negative power to the lens, thereby facilitating correction of spherical aberration and suppressing excessive distortion. However, when f / f4 falls below a lower limit, it is difficult to provide the lens with sufficient negative power, which is detrimental to spherical aberration correction and distortion suppression.

[0083] In an exemplary embodiment, the camera lens satisfies the following relationship:

[0084] 1<(RS3-RS4) / (RS3+RS4)<7; wherein RS3 represents the radius of curvature of the object side surface of the second lens at the optical axis, and RS4 represents the radius of curvature of the image side surface of the second lens at the optical axis. (RS3-RS4) / (RS3+RS4) can be 1.2, 1.8, 2.5, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, or 6.8. When the above relationship is met, the second lens can provide negative optical power for the lens, expanding the field of view of the lens. It is also beneficial to fully optimize the shape of the second lens, avoid over-bending of the second lens, facilitate the processing and molding of the second lens, and improve production yield. When (RS3-RS4) / (RS3+RS4) is lower than the lower limit, the second lens is too flat and the curvatures of the two surfaces are similar, which makes it difficult to provide sufficient negative optical focal length for the lens, which is not conducive to expanding the field of view of the lens; and when (RS3-RS4) / (RS3+RS4) exceeds the upper limit, it is easy to cause the second lens to bend too much, which is not conducive to the processing and molding of the second lens, and reduces the production yield.

[0085] In an exemplary embodiment, the camera lens satisfies the following relationship: -5<f5 / f<-2; where f5 represents the effective focal length of the fifth lens. f5 / f can be -4.5, -4, -3.7, -3.5, -3, -2.5, or -2.4. When the above relationship is satisfied, the fifth lens can provide the lens with negative optical power, thereby facilitating a longer back focal length of the lens, ensuring a sufficient focusing range, and improving image clarity. However, when f5 / f is below the lower limit, the optical power of the fifth lens is too small, which is not conducive to correcting lens aberrations. When f5 / f exceeds the upper limit, the back focal length of the lens is short, which is not conducive to focusing.

[0086] In an exemplary embodiment, the camera lens satisfies the following relationship: 30 < v1 - v2 < 40; where v1 represents the Abbe number of the first lens element in d-light, and v2 represents the Abbe number of the second lens element in d-light. Specifically, d-light refers to yellow light with a wavelength of 587.56 nm. v1 - v2 can be 32, 32.2, 32.4, 32.6, 33, 34, 35, 36, 37, 38, or 39. When this relationship is met, the Abbe numbers of the first and second lenses can be appropriately configured, thereby facilitating correction of lens chromatic aberration and ensuring image quality.

[0087] In an exemplary embodiment, a filter is disposed between the fifth lens and the imaging surface of the camera lens to filter out light outside the operating wavelength band, thereby preventing false color or moire caused by interference from non-operating wavelength light and avoiding color distortion in the image. Specifically, the filter can be an infrared filter made of glass.

[0088] In an exemplary embodiment, each lens in a camera lens can be made entirely of glass or entirely of plastic. Plastic lenses can reduce the weight and production costs of the camera lens, while glass lenses can provide the camera lens with better temperature tolerance and excellent optical performance. Furthermore, when the camera lens is used in thin and lightweight electronic devices such as mobile phones and tablets, each lens is preferably made of plastic to reduce weight and production costs. It should be noted that the material of each lens in a camera lens can be any combination of glass and plastic, and does not necessarily have to be entirely glass or entirely plastic.

[0089] In an exemplary embodiment, the camera lens may further include a protective glass. This protective glass is located on the image side of the fifth 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 camera 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.

[0090] The camera lens of the above-mentioned embodiment of the present application can use multiple lenses, such as the five lenses described above. By reasonably allocating the focal length, optical power, surface shape, thickness of each lens, and the on-axis spacing between each lens, the total length of the above-mentioned camera lens can be effectively controlled and the total length of the lens can be increased within a reasonable range to match electronic devices of different specifications; in addition, the head diameter of the camera lens is small, and it has a large aperture (FNO can be 2.2) and a large field of view, and is also light in weight, so that it can better meet the application requirements of electronic devices such as mobile phones, tablets, and car lenses. However, those skilled in the art should understand that without departing from the technical solution claimed in this application, the number of lenses constituting the camera lens can be changed to obtain the various results and advantages described in this specification.

[0091] Specific embodiments of the imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0092] Example 1

[0093] The following reference Figures 1 to 2 An imaging lens 100 according to a first embodiment of the present application will be described.

[0094] Figure 1 FIG. 1 shows a schematic structural diagram of the camera lens 100 according to Example 1. Figure 1 As shown, the camera 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 and an imaging surface S13.

[0095] 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 convex at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0096] 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 concave at the optical axis and at the circumference, and the image-side surface S4 is concave at the optical axis and at the circumference.

[0097] 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 concave at the circumference, and the image-side surface S6 is convex at the optical axis and convex at the circumference.

[0098] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces, wherein the object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is convex at the optical axis and convex at the circumference.

[0099] The fifth lens L5 has negative refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces, wherein the object-side surface S9 is convex at the optical axis and convex at the circumference, and the image-side surface S10 is concave at the optical axis and convex at the circumference.

[0100] Setting the object-side surfaces and image-side surfaces of the first lens L1 to the fifth lens L5 to be aspherical 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 camera lens 100 miniaturized.

[0101] The first lens L1 to the fifth lens L5 are all made of plastic. Using lenses made of plastic can reduce the weight of the camera lens 100 and lower the production cost.

[0102] A stop STO is also provided on the object side of the first lens L1 to limit the size of the incident light beam, further improving the imaging quality of the camera lens 100. The camera lens 100 also includes a filter 110 provided on the image side of the fifth lens L5 and having an object-side surface S11 and an image-side surface S12. Light from the object OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13. 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 in the imaging. Specifically, the filter 110 is an infrared filter made of glass.

[0103] Table 1 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 camera lens 100 of Example 1. The reference wavelength of the data in the table is 587.56 nm, wherein the units of the radius of curvature, thickness, and effective focal length of the lens are all 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 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.

[0104] Table 1

[0105]

[0106] The aspheric surface shape in a lens is defined by the following formula:

[0107]

[0108] 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-S10 of the lens in Example 1.

[0109] Table 2

[0110]

[0111]

[0112] The distance TTL on the optical axis from the object-side surface S1 of the first lens L1 to the imaging surface S13 of the camera lens 100 is 4.6 mm, and half the diagonal length of the effective pixel area on the imaging surface S13 of the camera lens 100, ImgH, is 2.93 mm. Combining the data in Tables 1 and 2, it can be seen that the camera lens 100 in Example 1 meets the following requirements:

[0113] TTL / f=1.314, where f represents the effective focal length of the camera lens 100;

[0114] CT1 / TTL=0.193, where CT1 represents the thickness of the first lens element L1 along the optical axis;

[0115] (FOV / 2) / f=11.429 degrees / mm, where FOV represents the maximum field of view of the camera lens 100;

[0116] TTL / ImgH=1.57;

[0117] RS7 / CT4=-3.541, where RS7 represents the radius of curvature of the object-side surface S7 of the fourth lens element L4 at the optical axis, and CT4 represents the thickness of the fourth lens element L4 along the optical axis.

[0118] FNO=2.5, where FNO represents the aperture number of the camera lens 100;

[0119] f / f4=-0.209, where f4 represents the effective focal length of the fourth lens L4;

[0120] (RS3-RS4) / (RS3+RS4)=1.26, where RS3 represents the radius of curvature of the object-side surface S3 of the second lens element L2 at the optical axis, and RS4 represents the radius of curvature of the image-side surface S4 of the second lens element L2 at the optical axis.

[0121] f5 / f=-2.4, where f5 represents the effective focal length of the fifth lens L5;

[0122] v1-v2=35.744, where v1 represents the Abbe number of the first lens L1 in d-light, and v2 represents the Abbe number of the second lens L2 in d-light.

[0123] Figure 2 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the camera lens 100 of Example 1 are shown respectively. The reference wavelength of the camera lens 100 is 587.56nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 486.13nm, 587.56nm and 656.27nm passing through the camera lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 587.56nm passing through the camera lens 100; the distortion curve shows the distortion of light with a wavelength of 587.56nm at different image heights passing through the camera lens 100. Figure 2 It can be seen that the camera lens 100 provided in Example 1 can achieve good imaging quality.

[0124] Example 2

[0125] The following reference Figures 3 and 4 The camera lens 100 according to the second embodiment of the present application will be described. In this embodiment, for the sake of brevity, some descriptions similar to those in the first embodiment will be omitted. Figure 3 FIG2 shows a schematic structural diagram of a camera lens 100 according to Embodiment 2 of the present application.

[0126] like Figure 3 As shown, the camera 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 and an imaging surface S13.

[0127] 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 convex at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0128] 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 concave at the optical axis and at the circumference, and the image-side surface S4 is concave at the optical axis and at the circumference.

[0129] 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 concave at the circumference, and the image-side surface S6 is convex at the optical axis and convex at the circumference.

[0130] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces, wherein the object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is convex at the optical axis and convex at the circumference.

[0131] The fifth lens L5 has negative refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces, wherein the object-side surface S9 is convex at the optical axis and convex at the circumference, and the image-side surface S10 is concave at the optical axis and convex at the circumference.

[0132] The object side surfaces and image side surfaces of the first lens L1 to the fifth lens L5 are all configured as aspheric surfaces. The materials of the first lens L1 to the fifth lens L5 are all plastic. A stop STO is also provided on the object side of the first lens L1 to limit the size of the incident light beam, further improving the imaging quality of the camera lens 100. The camera lens 100 also includes a filter 110 provided on the image side of the fifth lens L5 and having an object side surface S11 and an image side surface S12. Light from the object OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0133] 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 camera lens 100 of Example 2. The reference wavelength of the data in the table is 587.56 nm, where 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-S10 of the lenses that can be used in Example 2, where the aspheric surface shape can be defined by formula (1) given in Example 1. Table 5 shows the relevant parameter values ​​of the camera lens 100 given in Example 2.

[0134] Table 3

[0135]

[0136]

[0137] Table 4

[0138]

[0139] Table 5

[0140]

[0141] Figure 4 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the camera lens 100 of Example 2 are shown respectively. The reference wavelength of the camera lens 100 is 587.56nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 486.13nm, 587.56nm and 656.27nm passing through the camera lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 587.56nm passing through the camera lens 100; the distortion curve shows the distortion of light with a wavelength of 587.56nm at different image heights passing through the camera lens 100. Figure 4 It can be seen that the camera lens 100 provided in Example 2 can achieve good imaging quality.

[0142] Example 3

[0143] The following reference Figures 5 and 6 The camera lens 100 according to the third embodiment of the present application will be described. In this embodiment, for the sake of brevity, some descriptions similar to those in the first embodiment will be omitted. Figure 5 FIG. 1 is a schematic structural diagram of an imaging lens 100 according to a third embodiment of the present application.

[0144] like Figure 5 As shown, the camera 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 and an imaging surface S13.

[0145] 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 convex at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0146] 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 concave at the optical axis and at the circumference, and the image-side surface S4 is concave at the optical axis and at the circumference.

[0147] 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 concave at the circumference, and the image-side surface S6 is convex at the optical axis and convex at the circumference.

[0148] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces, wherein the object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is convex at the optical axis and convex at the circumference.

[0149] The fifth lens L5 has negative refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces, wherein the object-side surface S9 is convex at the optical axis and convex at the circumference, and the image-side surface S10 is concave at the optical axis and convex at the circumference.

[0150] The object side surfaces and image side surfaces of the first lens L1 to the fifth lens L5 are all configured as aspheric surfaces. The materials of the first lens L1 to the fifth lens L5 are all plastic. A stop STO is also provided on the object side of the first lens L1 to limit the size of the incident light beam, further improving the imaging quality of the camera lens 100. The camera lens 100 also includes a filter 110 provided on the image side of the fifth lens L5 and having an object side surface S11 and an image side surface S12. Light from the object OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0151] 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 camera lens 100 of Example 3. The reference wavelength of the data in the table is 587.56 nm, where 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-S10 of the lenses that can be used in Example 3, where the aspheric surface shape can be defined by formula (1) given in Example 1; Table 8 shows the relevant parameter values ​​of the camera lens 100 given in Example 3.

[0152] Table 6

[0153]

[0154]

[0155] Table 7

[0156]

[0157] Table 8

[0158]

[0159] Figure 6The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the camera lens 100 of Example 3 are shown respectively. The reference wavelength of the camera lens 100 is 587.56nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 486.13nm, 587.56nm and 656.27nm after passing through the camera lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 587.56nm after passing through the camera lens 100; the distortion curve shows the distortion of light with a wavelength of 587.56nm at different image heights after passing through the camera lens 100. Figure 6 It can be seen that the camera lens 100 provided in Example 3 can achieve good imaging quality.

[0160] Example 4

[0161] The following reference Figures 7 and 8 The camera lens 100 according to the fourth embodiment of the present application will be described. In this embodiment, for the sake of brevity, some descriptions similar to those in the first embodiment will be omitted. Figure 7 FIG. 1 is a schematic structural diagram of an imaging lens 100 according to a fourth embodiment of the present application.

[0162] like Figure 7 As shown, the camera 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 and an imaging surface S13.

[0163] 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 convex at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0164] 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 concave at the optical axis and at the circumference, and the image-side surface S4 is concave at the optical axis and at the circumference.

[0165] 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 concave at the circumference, and the image-side surface S6 is convex at the optical axis and convex at the circumference.

[0166] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces, wherein the object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is convex at the optical axis and convex at the circumference.

[0167] The fifth lens L5 has negative refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces, wherein the object-side surface S9 is convex at the optical axis and convex at the circumference, and the image-side surface S10 is concave at the optical axis and convex at the circumference.

[0168] The object side surfaces and image side surfaces of the first lens L1 to the fifth lens L5 are all configured as aspheric surfaces. The materials of the first lens L1 to the fifth lens L5 are all plastic. A stop STO is also provided on the object side of the first lens L1 to limit the size of the incident light beam, further improving the imaging quality of the camera lens 100. The camera lens 100 also includes a filter 110 provided on the image side of the fifth lens L5 and having an object side surface S11 and an image side surface S12. Light from the object OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0169] Table 9 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient), and effective focal length of each lens of the camera lens 100 of Example 4. The reference wavelength of the data in the table is 587.56 nm, where the units of the curvature radius, 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-S10 of the lenses that can be used in Example 4, where the aspheric surface shape can be defined by formula (1) given in Example 1; Table 11 shows the relevant parameter values ​​of the camera lens 100 given in Example 4.

[0170] Table 9

[0171]

[0172]

[0173] Table 10

[0174]

[0175] Table 11

[0176]

[0177] Figure 8The longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the camera lens 100 of Example 4 are shown respectively. The reference wavelength of the camera lens 100 is 587.56nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 486.13nm, 587.56nm, and 656.27nm passing through the camera lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 587.56nm passing through the camera lens 100; and the distortion curve shows the distortion of light with a wavelength of 587.56nm at different image heights passing through the camera lens 100. Figure 8 It can be seen that the camera lens 100 provided in Example 4 can achieve good imaging quality.

[0178] Example 5

[0179] The following reference Figures 9 and 10 The imaging lens 100 according to the fifth embodiment of the present application will be described. In this embodiment, for the sake of brevity, some descriptions similar to those in the first embodiment will be omitted. Figure 9 FIG. 1 is a schematic structural diagram of an imaging lens 100 according to Embodiment 5 of the present application.

[0180] like Figure 9 As shown, the camera 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 and an imaging surface S13.

[0181] 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 convex at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0182] 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 concave at the optical axis and at the circumference, and the image-side surface S4 is concave at the optical axis and at the circumference.

[0183] 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 concave at the circumference, and the image-side surface S6 is convex at the optical axis and convex at the circumference.

[0184] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces, wherein the object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is convex at the optical axis and convex at the circumference.

[0185] The fifth lens L5 has negative refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces, wherein the object-side surface S9 is convex at the optical axis and convex at the circumference, and the image-side surface S10 is concave at the optical axis and convex at the circumference.

[0186] The object side surfaces and image side surfaces of the first lens L1 to the fifth lens L5 are all configured as aspheric surfaces. The materials of the first lens L1 to the fifth lens L5 are all plastic. A stop STO is also provided on the object side of the first lens L1 to limit the size of the incident light beam, further improving the imaging quality of the camera lens 100. The camera lens 100 also includes a filter 110 provided on the image side of the fifth lens L5 and having an object side surface S11 and an image side surface S12. Light from the object OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0187] 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 camera lens 100 of Example 5. The reference wavelength of the data in the table is 587.56 nm, where 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-S10 of the lenses that can be used in Example 5, where the aspheric surface shape can be defined by formula (1) given in Example 1; Table 14 shows the relevant parameter values ​​of the camera lens 100 given in Example 5.

[0188] Table 12

[0189]

[0190]

[0191] Table 13

[0192]

[0193] Table 14

[0194]

[0195] Figure 10The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the camera lens 100 of Example 5 are shown respectively. The reference wavelength of the camera lens 100 is 587.56nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 486.13nm, 587.56nm and 656.27nm passing through the camera lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 587.56nm passing through the camera lens 100; the distortion curve shows the distortion of light with a wavelength of 587.56nm at different image heights passing through the camera lens 100. Figure 10 It can be seen that the camera lens 100 provided in Example 5 can achieve good imaging quality.

[0196] Example 6

[0197] The following reference Figures 11 to 12 The camera lens 100 according to the sixth embodiment of the present application will be described. In this embodiment, for the sake of brevity, some descriptions similar to those in the first embodiment will be omitted. Figure 11 A structural schematic diagram of the camera lens 100 according to embodiment 6 of the present application is shown.

[0198] like Figure 11 As shown, the camera 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 and an imaging surface S13.

[0199] 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 convex at the circumference, and the image-side surface S2 is convex at the optical axis and convex at the circumference.

[0200] 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 concave at the optical axis and at the circumference, and the image-side surface S4 is concave at the optical axis and at the circumference.

[0201] 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 concave at the circumference, and the image-side surface S6 is convex at the optical axis and convex at the circumference.

[0202] The fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both aspherical surfaces, wherein the object-side surface S7 is concave at the optical axis and concave at the circumference, and the image-side surface S8 is convex at the optical axis and convex at the circumference.

[0203] The fifth lens L5 has negative refractive power, and its object-side surface S9 and image-side surface S10 are both aspherical surfaces, wherein the object-side surface S9 is convex at the optical axis and convex at the circumference, and the image-side surface S10 is concave at the optical axis and convex at the circumference.

[0204] The object side surfaces and image side surfaces of the first lens L1 to the fifth lens L5 are all configured as aspheric surfaces. The materials of the first lens L1 to the fifth lens L5 are all plastic. A stop STO is also provided on the object side of the first lens L1 to limit the size of the incident light beam, further improving the imaging quality of the camera lens 100. The camera lens 100 also includes a filter 110 provided on the image side of the fifth lens L5 and having an object side surface S11 and an image side surface S12. Light from the object OBJ passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13. Specifically, the filter 110 is an infrared filter, and its material is glass.

[0205] Table 15 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (i.e., dispersion coefficient), and effective focal length of each lens of the camera lens 100 of Example 6. The reference wavelength of the data in the table is 587.56 nm, where the units of curvature radius, 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-S10 of the lenses that can be used in Example 6, where the aspheric surface shape can be defined by formula (1) given in Example 1. Table 17 shows the relevant parameter values ​​of the camera lens 100 given in Example 6.

[0206] Table 15

[0207]

[0208]

[0209] Table 16

[0210]

[0211] Table 17

[0212]

[0213] Figure 12The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the camera lens 100 of Example 6 are shown respectively. The reference wavelength of the camera lens 100 is 587.56nm. The longitudinal spherical aberration curve shows the deviation of the focal point of light with wavelengths of 486.13nm, 587.56nm and 656.27nm passing through the camera lens 100; the astigmatism curve shows the meridional image curvature and sagittal image curvature of light with a wavelength of 587.56nm passing through the camera lens 100; the distortion curve shows the distortion of light with a wavelength of 587.56nm at different image heights passing through the camera lens 100. Figure 12 It can be seen that the camera lens 100 provided in Example 6 can achieve good imaging quality.

[0214] like Figure 13 As shown, the present application also provides an imaging module 200, including the camera lens 100 as described above (such as Figure 1 ); and a photosensitive element 210, which is disposed on the image side of the camera lens 100. The photosensitive surface of the photosensitive element 210 coincides with the imaging surface S13. Specifically, the photosensitive element 210 may be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor. Depending on the corresponding photosensitive element 210, the imaging surface S13 may be a flat surface or a curved surface with arbitrary curvature, particularly a surface with a concave surface facing toward the object side.

[0215] In some other embodiments, the imaging module 200 further includes a lens barrel (not shown) for carrying the camera lens 100 and a corresponding supporting device (not shown).

[0216] In addition, the imaging module 200 also includes a drive device (not shown) and an image stabilization module (not shown). The drive device may have an auto-focus function and may be driven by a drive system such as a voice coil motor (VCM), micro electro-mechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The drive device allows the camera lens 100 to achieve an optimal imaging position, thereby capturing clear images of the subject at various object distances. The image stabilization module may be an accelerometer, gyroscope, or Hall Effect Sensor. The driving device and the image stabilization module together serve as an optical image stabilization (OIS) device. By adjusting the displacement of the camera lens 100 on the optical axis to compensate for the blurred image caused by shaking at the moment of shooting, or utilizing the image compensation technology in the imaging software to provide an electronic image stabilization (EIS) function, further improving the image quality of dynamic and low-light scene shooting.

[0217] The imaging module 200 can be compatible with electronic devices of various specifications. Utilizing the aforementioned camera lens 100, it facilitates capturing distant objects with high image clarity. Furthermore, the imaging module 200 features a small head and lightweight structure, making it easily adaptable to devices with limited size, such as mobile phones, tablets, and vehicle cameras. Specifically, it can be used as a mobile phone camera, vehicle camera, surveillance camera, or endoscope.

[0218] like Figure 14 As shown, the present application further provides an electronic device 300, comprising a housing 310 and the imaging module 200 as described above, wherein the imaging module 200 is mounted on the housing 310. Specifically, the imaging module 200 is disposed within the housing 310 and exposed from the housing 310 to capture images. The housing 310 can provide the imaging module 200 with protection such as dustproof, waterproof, and drop-proof. The housing 310 is provided with a hole corresponding to the imaging module 200 to allow light to enter or exit the housing through the hole.

[0219] The electronic device 300 utilizes the aforementioned imaging module 200, which facilitates the realization of a full-screen display and enables clear capture of distant objects. In other embodiments, the electronic device 300 is further provided with a corresponding processing system. After capturing an image of an object, the electronic device 300 can promptly transmit the image to the corresponding processing system so that the system can make accurate analysis and judgment.

[0220] In other embodiments, the “electronic device” used may also include, but is not limited to, devices configured to receive or send communication signals via a wired connection and / or via a wireless interface. Electronic devices configured to communicate via a wireless interface may be referred to as “wireless communication terminals,” “wireless terminals,” or “mobile terminals.” 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 handheld receivers or other electronic devices that include radiotelephone transceivers. In addition, “electronic devices” may also include three-dimensional image capture devices, digital cameras, tablet computers, smart TVs, network monitoring devices, driving recorders, reversing imaging devices, multi-lens devices, recognition systems, somatosensory game consoles, and wearable devices. The above-mentioned electronic devices are merely exemplary examples of practical applications of the present invention and are not intended to limit the application scope of the imaging module of the present application.

[0221] 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.

[0222] 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. A camera lens, characterized in that: The number of lenses with optical power is five, and the camera lens includes, in order from the object side to the image side along the optical axis, a first lens having positive refractive power, wherein the object-side surface of the first lens is convex near the optical axis; a second lens having negative optical power; a third lens having positive optical power; a fourth lens element having negative optical power, wherein the object-side surface of the fourth lens element is concave near the optical axis and the image-side surface is convex near the optical axis; a fifth lens having negative optical power, wherein at least one of the object-side surface and the image-side surface of the fifth lens includes at least one inflection point; The camera lens satisfies the following relationship: 1.3<TTL / f<1.5, -5<RS7 / CT4<-3, 2.2≤FNO≤2.5, 1<(RS3-RS4) / (RS3+RS4)<7, 30<v1-v2<40, -5<f5 / f<-2; Among them, TTL represents the distance from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis, f represents the effective focal length of the camera lens, RS7 represents the curvature radius of the object side surface of the fourth lens at the optical axis, CT4 represents the thickness of the fourth lens on the optical axis, FNO represents the aperture number of the camera lens, RS3 represents the curvature radius of the object side surface of the second lens at the optical axis, RS4 represents the curvature radius of the image side surface of the second lens at the optical axis, v1 represents the d-light Abbe number of the first lens, v2 represents the d-light Abbe number of the second lens, and f5 represents the effective focal length of the fifth lens.

2. The imaging lens according to claim 1, wherein: The camera lens satisfies the following relationship: 0.18≤CT1 / TTL≤0.22; Wherein, CT1 represents the thickness of the first lens on the optical axis.

3. The camera lens according to claim 1, wherein: The camera lens satisfies the following relationship: (FOV / 2) / f>8deg / mm; Wherein, FOV represents the maximum field of view of the camera lens.

4. The imaging lens according to claim 1, wherein: The camera lens satisfies the following relationship: 1.638≥TTL / ImgH≥1.57; Wherein, ImgH represents half of the diagonal length of the effective pixel area on the imaging surface of the camera lens.

5. The imaging lens according to claim 1, wherein: The camera lens satisfies the following relationship: -0.007>f / f4>-0.5; Wherein, f4 represents the effective focal length of the fourth lens.

6. An imaging module, characterized in that: The invention comprises the camera lens according to any one of claims 1 to 5 and a photosensitive element, wherein the photosensitive element is arranged on the image side of the camera lens.

7. An electronic device, characterized in that: It comprises a shell and the imaging module as claimed in claim 6, wherein the imaging module is mounted on the shell.

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