Camera lens

Abstract

The utility model discloses a camera lens. The camera lens comprises a lens barrel, a six-piece lens group and a spacer group, wherein the six-piece lens group and the spacer group are arranged in the lens barrel; the six-piece type lens group comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with positive focal power and a sixth lens with negative focal power which are sequentially arranged from the object side to the image side along the optical axis; the spacer group comprises a fourth spacer and a fifth spacer; the camera lens satisfies: 2.7 lt; f / (f5 + f6) lt; -1.2,-2.0 lt,-1.2,-2.0 lt; f1 / f3lt; -1.7, 0.5 lt,-1.7, 0.5 lt; (EP45 + CP5) / (CT5 + T45) lt; 1, 1.4, 2.2 lt; cT5 / EP45lt; f is the total effective focal length of the pick-up lens, f1 is the effective focal length of the first lens, f3 is the effective focal length of the third lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, T45 is the air interval between the fourth lens and the fifth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and T6 is the center thickness of the fifth lens on the optical axis. EP45 is the interval between the fourth spacer and the fifth spacer along the optical axis, and CP5 is the maximum thickness of the fifth spacer.

Description

Technical Field

[0001] The present application relates to the field of optical devices, and in particular to a six-element camera lens. Background Art

[0002] In recent years, with the ever-changing consumer demand, the requirements for camera lenses have gradually become more complex and diversified. In different application scenarios, the performance of camera lenses is also different.

[0003] At present, six-element camera lenses have become the mainstream and are widely used in the fields of mobile phones, security, automobiles, drones, etc. The fifth lens in the six-element camera lens is designed to be thick in the middle and thin at the edges, which will cause the distance between the non-effective diameter part of the fifth lens and the non-effective diameter part of the sixth lens along the optical axis to be greater than the distance between the non-effective diameter parts of any two adjacent lenses from the first lens to the fifth lens along the optical axis. The fifth lens and the sixth lens are prone to abnormal problems such as tilt and deformation during the assembly process, thereby affecting the assembly stability of the camera lens. Utility Model Content

[0004] The present application provides a camera lens that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] One aspect of the present application provides a camera lens, which includes a lens barrel, a six-lens group, and a spacer group disposed within the lens barrel; the six-lens group includes a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, a fifth lens with a positive optical power, and a sixth lens with a negative optical power arranged in sequence from the object side to the image side along the optical axis; the spacer group includes a fourth spacer disposed on and in contact with the image side surface of the fourth lens and a fifth spacer disposed on and in contact with the image side surface of the fifth lens; wherein, the axial interval distance between the non-effective diameter portions of the fifth lens and the sixth lens is greater than the axial interval distance between the non-effective diameter portions of any two adjacent lenses among the first lens to the fifth lens; the effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: -2.0 < f1 / f3 < -1.7; the total effective focal length f of the camera lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -2.7 < f / (f5 + f6) < -1.2; the central thickness CT5 of the fifth lens on the optical axis and the axial interval EP45 between the fourth spacer and the fifth spacer satisfy: 2.2 < CT5 / EP45 < 3.4; the air interval T45 between the fourth lens and the fifth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the axial interval EP45 between the fourth spacer and the fifth spacer, and the maximum thickness CP5 of the fifth spacer satisfy: 0.5 < (EP45 + CP5) / (CT5 + T45) < 1.4.

[0006] According to an exemplary embodiment of the present application, the spacer group further includes a first spacer disposed on and in contact with the image side surface of the first lens; wherein, the axial interval EP01 between the object side end surface of the lens barrel and the first spacer, the central thickness CT1 of the first lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis satisfy: 1.0 < EP01 / (CT1 + T12) < 2.7.

[0007] According to an exemplary embodiment of the present application, the spacer group further includes a first spacer disposed on and in contact with the image side surface of the first lens; wherein, the effective focal length f1 of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 0.8 < f1 / R2 < 1.8; the inner diameter d1m of the image side surface of the first spacer and the outer diameter D1m of the image side surface of the first spacer satisfy: 1.8 < D1m / d1m < 2.6.

[0008] According to an exemplary embodiment of the present application, the spacer group also includes a second spacer placed on the image side surface of the second lens and in contact with the image side surface of the second lens; wherein the combined focal length f345 of the third lens, the fourth lens and the fifth lens, the inner diameter d2m of the image side surface of the second spacer and the inner diameter d5s of the object side surface of the fifth spacer satisfy: 1.1<(d5s-d2m) / f345<1.8.

[0009] According to an exemplary embodiment of the present application, the spacer group also includes a first spacer placed on the image side surface of the first lens and in contact with the image side surface of the first lens, and a second spacer placed on the image side surface of the second lens and in contact with the image side surface of the second lens; wherein the center thickness CT2 of the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, the gap EP12 between the first spacer and the second spacer along the optical axis, and the maximum thickness CP2 of the second spacer satisfy: 1.7<(CT2+T23) / (EP12+CP2)<3.3.

[0010] According to an exemplary embodiment of the present application, the spacer group also includes a second spacer placed on the image side surface of the second lens and in contact with the image side surface of the second lens, and a third spacer placed on the image side surface of the third lens and in contact with the image side surface of the third lens; wherein, the air gap T23 between the second lens and the third lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the interval EP23 between the second spacer and the third spacer along the optical axis satisfy: 1.0<(EP23+CT3) / (T23+T34)<2.3.

[0011] According to an exemplary embodiment of the present application, the spacer group also includes a second spacer placed on the image side surface of the second lens and in contact with the image side surface of the second lens, and a third spacer placed on the image side surface of the third lens and in contact with the image side surface of the third lens; wherein the inner diameter d2m of the image side surface of the second spacer, the outer diameter D2m of the image side surface of the second spacer, the inner diameter d3m of the image side surface of the third spacer, and the outer diameter D3m of the image side surface of the third spacer satisfy: 1.4<(D2m-d2m) / (D3m-d3m)<5.3.

[0012] According to an exemplary embodiment of the present application, the spacer group further includes a third spacer disposed on the image side of the third lens and in contact with the image side of the third lens; wherein the air gap T34 between the third lens and the fourth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis and the maximum thickness CP3 of the third spacer satisfy: 0.4 <CP3 / (T34+CT4)<0.8。

[0013] According to an exemplary embodiment of the present application, the spacer group further includes a third spacer disposed on the image side surface of the third lens and in contact with the image side surface of the third lens; wherein the central thickness CT3 of the third lens on the optical axis, the outer diameter D3m of the image side surface of the third spacer, and the interval EP34 between the third spacer and the fourth spacer along the optical axis satisfy: 3.0 <D3m / (EP34+CT3)<4.5。

[0014] According to an exemplary embodiment of the present application, the spacer group further includes a third spacer disposed on the image side surface of the third lens and in contact with the image side surface of the third lens; wherein the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the inner diameter d3s of the object side surface of the third spacer, and the inner diameter d4s of the object side surface of the fourth spacer satisfy: -2.0 <f4 / f3+d4s / d3s<-0.5。

[0015] According to an exemplary embodiment of the present application, the spacer group also includes a fifth auxiliary spacer disposed on the image side surface of the fifth spacer and in contact with the image side surface of the fifth spacer; wherein the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens and the inner diameter d5bs of the object side surface of the fifth auxiliary spacer satisfy: -0.5<(f5+f6) / d5bs<0.

[0016] According to an exemplary embodiment of the present application, the maximum length L of the lens barrel along the direction of the optical axis, the total effective focal length f of the camera lens and the aperture number FNO of the camera lens satisfy: 3.9 <L / f×FNO<4.8。

[0017] According to an exemplary embodiment of the present application, the maximum effective semi-aperture DT52 of the image side surface of the fifth lens, the maximum effective semi-aperture DT61 of the object side surface of the sixth lens, the inner diameter d5s of the object side surface of the fifth spacer, and the inner diameter d5m of the image side surface of the fifth spacer satisfy: 5.0 <d5s / DT52+d5m / DT61<6.0。

[0018] According to an exemplary embodiment of the present application, the on-axis distance SG52 between the intersection of the image side surface of the fifth lens and the optical axis to the object side surface of the fifth spacer, the on-axis distance SG61 between the intersection of the object side surface of the sixth lens and the optical axis to the image side surface of the fifth spacer, and the center thickness CT5 of the fifth lens on the optical axis satisfy: 0.6<(|SG52|+|SG61|) / CT5<1.1.

[0019] The camera lens provided by this application adopts six lenses. By controlling the optical power of each lens, the camera lens can meet the wide-angle characteristics, and the camera lens satisfies "-2.0 < f1 / f3 < -1.7" and "-2.7 < f / (f5 + f6) < -1.2", which can restrict the trend of light rays in the first lens, the third lens, the fifth lens and the sixth lens, and reduce the sensitivity of the lens. However, in this case, the fifth lens will be designed in a structure with a thick middle and thin edges, and the thickness ratio of the fifth lens satisfies "2.2 < CT5 / EP45 < 3.4", and the distance between the non-effective diameter parts of the fifth lens and the sixth lens along the optical axis direction is greater than the distance between the non-effective diameter parts of any two adjacent lenses from the first lens to the fifth lens along the optical axis direction, resulting in abnormal problems such as inclination and deformation of the fifth lens and the sixth lens during the assembly process, thus affecting the assembly stability of the camera lens. Therefore, by controlling the camera lens to satisfy "0.5 < (EP45 + CP5) / (CT5 + T45) < 1.4", the maximum thickness of the fifth spacer can be restricted within a reasonable range, indirectly controlling the overall shape of the sixth lens, so that the fifth lens and the sixth lens are evenly stressed during the assembly process, and while ensuring the formability of the fifth lens and the sixth lens, the assembly stability of the camera lens is improved. Description of the Drawings

[0020] Other features, objects and advantages of this application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Among them:

[0021] Figure 1A Shows a schematic diagram of a parameter annotation of the camera lens according to this application;

[0022] Figure 1B Shows another schematic diagram of a parameter annotation of the camera lens according to this application;

[0023] Figure 2A Is a schematic diagram of the stress distribution when the camera lens satisfies (EP45 + CP5) / (CT5 + T45) = 1.34;

[0024] Figure 2B Is a schematic diagram of the stress distribution when the camera lens satisfies (EP45 + CP5) / (CT5 + T45) = 0.2;

[0025] Figure 2C Is a schematic diagram of the stress distribution when the camera lens satisfies (EP45 + CP5) / (CT5 + T45) = 1.5;

[0026] Figure 3 Shows a schematic diagram of the structure of the camera lens according to Embodiment 1 of this application;

[0027] Figure 4 A schematic structural diagram of a camera lens according to Embodiment 2 of the present application is shown;

[0028] Figure 5 A schematic structural diagram of a camera lens according to Embodiment 3 of the present application is shown;

[0029] FIG. 6A to FIG. 6C The axial chromatic aberration curve, the astigmatism curve and the distortion curve of the camera lens according to Embodiment 1, 2 or 3 of the present application are respectively shown;

[0030] Figure 7 A schematic structural diagram of a camera lens according to Embodiment 4 of the present application is shown;

[0031] Figure 8 A schematic structural diagram of a camera lens according to Embodiment 5 of the present application is shown;

[0032] Fig. 9 A schematic structural diagram of a camera lens according to Embodiment 6 of the present application is shown;

[0033] FIG. 10A to FIG. 10C The axial chromatic aberration curve, the astigmatism curve and the distortion curve of the camera lens according to Embodiment 4, 5 or 6 of the present application are respectively shown;

[0034] Fig.11 A schematic structural diagram of a camera lens according to Embodiment 7 of the present application is shown;

[0035] Fig.12 A schematic structural diagram of a camera lens according to Embodiment 8 of the present application is shown;

[0036] Fig.13 A schematic structural diagram of a camera lens according to Embodiment 9 of the present application is shown; and

[0037] FIG. 14A to FIG. 14C The axial chromatic aberration curve, the astigmatism curve and the distortion curve of the camera lens according to Embodiment 7, 8 or 9 of the present application are respectively shown. DETAILED DESCRIPTION

[0038] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0039] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0040] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0041] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0042] It should also be understood that the terms "including" and / or "having", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when describing the embodiments of the present application, the term "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0043] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] Figure 1A Schematic diagram of the structural arrangement and some parameters of the camera lens according to an exemplary embodiment of the present application. Figure 1A, d1m represents the inner diameter of the image side surface of the first spacer, D1m represents the outer diameter of the image side surface of the first spacer, d2m represents the inner diameter of the image side surface of the second spacer, D2m represents the outer diameter of the image side surface of the second spacer, d3s represents the inner diameter of the object side surface of the third spacer, d3m represents the inner diameter of the image side surface of the third spacer, D3m represents the outer diameter of the image side surface of the third spacer, d4s represents the inner diameter of the object side surface of the fourth spacer, d5s represents the inner diameter of the object side surface of the fifth spacer, d5m represents the inner diameter of the image side surface of the fifth spacer, and d5bs represents the inner diameter of the fifth auxiliary spacer. The inner diameter of the object side, EP01 represents the interval between the object side end face of the lens barrel and the first spacer along the optical axis, EP12 represents the interval between the first spacer and the second spacer along the optical axis, CP2 represents the maximum thickness of the second spacer, EP23 represents the interval between the second spacer and the third spacer along the optical axis, CP3 represents the maximum thickness of the third spacer, EP34 represents the interval between the third spacer and the fourth spacer along the optical axis, EP45 represents the interval between the fourth spacer and the fifth spacer along the optical axis, CP5 represents the maximum thickness of the fifth spacer, and L represents the maximum length of the lens barrel along the direction of the optical axis.

[0046] refer to Figures 3 to 5 , Figures 7 to 9 as well as Figures 11 to 13 In a first aspect of the present application, a camera lens is provided. The camera lens may include a six-piece lens group. The six-piece lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Among the first lens to the sixth lens, any two adjacent lenses may have an air gap between them.

[0047] In an exemplary embodiment, the first lens may have a negative optical power. The second lens may have a positive optical power. The third lens may have a positive optical power. The fourth lens may have a negative optical power. The fifth lens may have a positive optical power. The sixth lens may have a negative optical power. Reasonable configuration of the optical power of each lens can enable the camera lens to meet the wide-angle feature.

[0048] In an exemplary embodiment, the object-side surface of the first lens is concave, and the image-side surface is convex.

[0049] In an exemplary embodiment, the object-side surface of the second lens is convex, and the image-side surface is concave.

[0050] In an exemplary embodiment, the object-side surface of the third lens is convex, and the image-side surface is convex.

[0051] In an exemplary embodiment, the object-side surface of the fourth lens is convex, and the image-side surface is concave.

[0052] In an exemplary embodiment, the object-side surface of the fifth lens is a convex surface or a concave surface, and the image-side surface is a convex surface.

[0053] In an exemplary embodiment, the object-side surface of the sixth lens is convex, and the image-side surface is concave.

[0054] In an exemplary embodiment, a distance between the non-effective diameter portion of the fifth lens and the non-effective diameter portion of the sixth lens along the optical axis direction is greater than a distance between the non-effective diameter portions of any two adjacent lenses of the first to fifth lenses along the optical axis direction.

[0055] In an exemplary embodiment, the camera lens may further include a spacer group, and the spacer group may include one or more of a first spacer, a second spacer, a third spacer, a fourth spacer, a fifth spacer, and a fifth auxiliary spacer. The first spacer may be placed on the image side of the first lens and at least partially contact the image side of the first lens. The second spacer may be placed on the image side of the second lens and at least partially contact the image side of the second lens. The third spacer may be placed on the image side of the third lens and at least partially contact the image side of the third lens. The fourth spacer may be placed on the image side of the fourth lens and at least partially contact the image side of the fourth lens. The fifth spacer may be placed on the image side of the fifth lens and at least partially contact the image side of the fifth lens. The fifth auxiliary spacer may be placed on the image side of the fifth spacer and at least partially contact the image side of the fifth spacer. The reasonable use of spacers can effectively avoid the risk of stray light, reduce interference with image quality, and thereby improve the imaging quality of the camera lens; at the same time, it can also ensure the bearing stability of the lens.

[0056] In an exemplary embodiment, the camera lens may further include a lens barrel, and the six-piece lens group and the spacer group are placed in the lens barrel. The lens barrel may include an object side end surface, an image side end surface, an outer annular surface, and an inner annular surface, wherein the end surface of the lens barrel closest to the object side is the object side end surface of the lens barrel, and the end surface of the lens barrel closest to the image side is the image side end surface of the lens barrel; in a direction perpendicular to the optical axis, the surface of the lens barrel farthest from the optical axis is the outer annular surface, and the surface of the lens barrel closest to the optical axis is the inner annular surface.

[0057] In an exemplary embodiment, the imaging lens may further include a stop disposed between the second lens and the third lens.

[0058] In an exemplary embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens may satisfy: -2.0 < f1 / f3 < -1.7; the total effective focal length f of the camera lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens may satisfy: -2.7 < f / (f5 + f6) < -1.2; the central thickness CT5 of the fifth lens on the optical axis and the interval EP45 between the fourth spacer and the fifth spacer along the optical axis may satisfy: 2.2 < CT5 / EP45 < 3.4; the air interval T45 between the fourth lens and the fifth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the interval EP45 between the fourth spacer and the fifth spacer along the optical axis, and the maximum thickness CP5 of the fifth spacer may satisfy: 0.5 < (EP45 + CP5) / (CT5 + T45) < 1.4.

[0059] Reasonably configuring the ratio of the total effective focal length of the camera lens to the sum of the effective focal lengths of the fifth lens and the sixth lens and the ratio of the effective focal length of the first lens to the effective focal length of the third lens can constrain the light path in the first lens, the third lens, the fifth lens, and the sixth lens, reducing the sensitivity of the lens. In this case, the fifth lens will be designed in a structure with a thicker middle and thinner edges, and the thickness ratio of the fifth lens satisfies "2.2 < CT5 / EP45 < 3.4". Moreover, the interval distance between the non-effective diameter parts of the fifth lens and the sixth lens along the optical axis is greater than the interval distance between the non-effective diameter parts of any two adjacent lenses from the first lens to the fifth lens along the optical axis, resulting in prone occurrence of abnormal problems such as tilting and deformation during the assembly process of the fifth lens and the sixth lens, thus affecting the assembly stability of the camera lens. Therefore, by controlling the camera lens to satisfy "0.5 < (EP45 + CP5) / (CT5 + T45) < 1.4", the maximum thickness of the fifth spacer can be constrained within a reasonable range, indirectly controlling the overall shape of the sixth lens, enabling the fifth lens and the sixth lens to be evenly stressed during the assembly process, and improving the assembly stability of the camera lens while ensuring the formability of the fifth lens and the sixth lens.

[0060] Table 1 shows the assembly states of three camera lenses (such as camera lens 1, camera lens 2, and camera lens 3).

[0061]

[0062]

[0063] Table 1

[0064] As shown in Table 1, Figure 2A , Figure 2B , Figure 2C shown, Figure 2ASchematic diagram of the stress distribution of the camera lens 1 when f1 / f3 = -1.8, f / (f5 + f6) = -2.6, CT5 / EP45 = 2.9, and (EP45 + CP5) / (CT5 + T45) = 1.34. Figure 2B Schematic diagram of the stress distribution of the camera lens 2 when f1 / f3 = -1.8, f / (f5 + f6) = -1.4, CT5 / EP45 = 2.3, and (EP45 + CP5) / (CT5 + T45) = 0.2. Figure 2C Schematic diagram of the stress distribution of the camera lens 3 when f1 / f3 = -1.8, f / (f5 + f6) = -1.7, CT5 / EP45 = 3.0, and (EP45 + CP5) / (CT5 + T45) = 1.5.

[0065] From Figure 2B the perspective, when (EP45 + CP5) / (CT5 + T45) = 0.2, the ratio of the edge thickness to the center thickness of the sixth lens is relatively large, the curvature of the non-effective diameter part and the transition part of the effective diameter of the sixth lens is relatively large, which is not conducive to the molding of the sixth lens, and there is an obvious stress concentration phenomenon at the position of the sixth lens for bearing against the fifth spacer, which will cause abnormal problems such as inclination and deformation of the sixth lens during assembly, and the assembly stability of the camera lens is relatively poor. From Figure 2C the perspective, when (EP45 + CP5) / (CT5 + T45) = 1.5, the edge thickness of the sixth lens is small, which is not conducive to the molding of the sixth lens, and there is an obvious stress concentration phenomenon at the position in the lens barrel corresponding to the bearing position of the sixth lens and the fifth spacer, which will cause abnormal problems such as inclination and deformation of the sixth lens during assembly, and the assembly stability of the camera lens is relatively poor. From Figure 2A the perspective, when (EP45 + CP5) / (CT5 + T45) = 1.34, the overall force on the sixth lens is uniform, the thickness ratio is conducive to molding, the stress concentration phenomenon of the sixth lens is reduced, and the assembly stability of the camera lens is improved.

[0066] It can be seen that when the camera lens satisfies "-2.7 < f / (f5 + f6) < -1.2, -2.0 < f1 / f3 < -1.7, 2.2 < CT5 / EP45 < 3.4", further regulating the camera lens to satisfy 0.5 < (EP45 + CP5) / (CT5 + T45) < 1.4 can effectively reduce the risk of inclination and deformation of the sixth lens during assembly and improve the assembly stability of the camera lens.

[0067] In an exemplary embodiment, the interval EP01 between the object-side end face of the lens barrel and the first spacer along the optical axis, the central thickness CT1 of the first lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis may satisfy: 1.0 < EP01 / (CT1 + T12) < 2.7. By controlling the above conditional expression, the interval between the object-side end face of the lens barrel and the first spacer along the optical axis can be constrained within a reasonable range, which is beneficial to restricting the thickness of the object-side end of the lens barrel, facilitating molding and filling, reducing the risk of stray light at the sharp corners of the light passing hole, and at the same time is also beneficial to restricting the edge thickness dimension of the non-effective diameter part of the first lens, meeting the molding requirements.

[0068] In an exemplary embodiment, the effective focal length f1 of the first lens and the curvature radius R2 of the image-side surface of the first lens may satisfy: 0.8 < f1 / R2 < 1.8; the inner diameter d1m of the image-side surface of the first spacer and the outer diameter D1m of the image-side surface of the first spacer may satisfy: 1.8 < D1m / d1m < 2.6. By controlling the ratio of the effective focal length of the first lens to the curvature radius of the image-side surface of the first lens, the overall shape of the first lens can be constrained, which is beneficial to the processing and molding of the first lens; at the same time, by restricting the ratio of the outer diameter to the inner diameter of the image-side surface of the first spacer, the first spacer can block the excess light transmitted through the edge of the first lens, improving the picture quality of the camera lens.

[0069] In an exemplary embodiment, the combined focal length f345 of the third lens, the fourth lens, and the fifth lens, the inner diameter d2m of the image-side surface of the second spacer, and the inner diameter d5s of the object-side surface of the fifth spacer may satisfy: 1.1 < (d5s - d2m) / f345 < 1.8. By controlling the above conditional expression, the combined focal length of the third lens, the fourth lens, and the fifth lens can be constrained within a certain range, effectively controlling the direction of light in these three lenses, and coordinating the overall optical length of the camera lens, leaving sufficient space for the design of the first lens, the second lens, and the sixth lens; at the same time, by restricting the inner diameters of the image-side surface of the second spacer and the object-side surface of the fifth spacer, it can be ensured that the second spacer and the fifth spacer block the non-imaging light, reducing the risk of stray light in the camera lens.

[0070] In an exemplary embodiment, the central thickness CT2 of the second lens on the optical axis, the air interval T23 between the second lens and the third lens on the optical axis, the interval EP12 between the first spacer and the second spacer along the optical axis, and the maximum thickness CP2 of the second spacer may satisfy: 1.7 < (CT2 + T23) / (EP12 + CP2) < 3.3. By controlling the above conditional expression, the edge thickness, central thickness of the second lens, and the air interval between the second lens and the third lens can be respectively constrained within a reasonable range, effectively restricting the uniformity of the overall surface shape structure of the second lens, which is beneficial to lens mold processing and injection molding.

[0071] In an exemplary embodiment, the air gap T23 between the second lens and the third lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the interval EP23 between the second spacer and the third spacer along the optical axis may satisfy: 1.0 < (EP23 + CT3) / (T23 + T34) < 2.3. By controlling the above conditional expression, the edge thickness and the central thickness of the third lens can be respectively constrained within a reasonable range, effectively restricting the overall structural uniformity of the third lens and reducing the risk of molding AS. At the same time, by cooperating with restricting the air gap between the second lens and the third lens and the air gap between the third lens and the fourth lens, the distribution uniformity of light can be adjusted, which is beneficial to improving the peak value of the camera lens.

[0072] In an exemplary embodiment, the inner diameter d2m of the image side surface of the second spacer, the outer diameter D2m of the image side surface of the second spacer, the inner diameter d3m of the image side surface of the third spacer, and the outer diameter D3m of the image side surface of the third spacer may satisfy: 1.4 < (D2m - d2m) / (D3m - d3m) < 5.3. By controlling the above conditional expression, the inner and outer diameters of the image side surface of the second spacer can be constrained within a reasonable range, ensuring that the second spacer can block the internally reflected stray light rays and the edge stray light rays of the second lens to prevent the above stray light rays from entering the third lens. At the same time, by cooperating with restricting the inner and outer diameters of the image side surface of the third spacer, the bearing position and size between it and the fourth lens can be determined, which is beneficial to improving the assembly stability of the camera lens and enhancing the assembly yield of the camera lens.

[0073] In an exemplary embodiment, the air gap T34 between the third lens and the fourth lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, and the maximum thickness CP3 of the third spacer may satisfy: 0.4 < CP3 / (T34 + CT4) < 0.8. By controlling the mutual relationship among the maximum thickness of the third spacer, the air gap between the third lens and the fourth lens on the optical axis, and the central thickness of the fourth lens on the optical axis, the overall structural uniformity of the fourth lens can be effectively restricted, which is beneficial to the processing and molding of the fourth lens and the improvement of stray light.

[0074] In an exemplary embodiment, the central thickness CT3 of the third lens on the optical axis, the outer diameter D3m of the image side surface of the third spacer, and the interval EP34 between the third spacer and the fourth spacer along the optical axis satisfy: 3.0 < D3m / (EP34 + CT3) < 4.5. By controlling the above conditional expression, the edge thickness of the fourth lens can be constrained, and the thickness ratio of the fourth lens can be limited within a reasonable range, reducing the molding risk; at the same time, in cooperation with restricting the central thickness of the third lens and the outer diameter of the image side surface of the third spacer, while ensuring the moldability of the third lens, it is beneficial to constrain the contact dimension between the third spacer and the fourth lens, improving the assembly stability of the imaging lens.

[0075] In an exemplary embodiment, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the inner diameter d3s of the object side surface of the third spacer, and the inner diameter d4s of the object side surface of the fourth spacer may satisfy: -2.0 < f4 / f3 + d4s / d3s < -0.5. By controlling the above conditional expression, the effective focal lengths of the third lens and the fourth lens can be restricted, effectively constraining the light path inside the third lens and the fourth lens; at the same time, in cooperation with restricting the inner diameters of the object side surfaces of the third spacer and the fourth spacer, the marginal rays of the third lens and the fourth lens can be controlled, avoiding non-spherical marginal ineffective rays and reflected rays from entering the subsequent lenses, reducing the number and intensity of stray light in the overall imaging lens, and improving the imaging quality of the imaging lens.

[0076] In an exemplary embodiment, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the inner diameter d5bs of the object side surface of the fifth auxiliary spacer may satisfy: -0.5 < (f5 + f6) / d5bs < 0. By controlling the above conditional expression, the effective focal lengths of the fifth lens and the sixth lens can be respectively restricted within a reasonable range, effectively constraining the overall shapes of the fifth lens and the sixth lens; at the same time, in cooperation with restricting the inner diameter of the object side surface of the fifth auxiliary spacer, the fifth auxiliary spacer can be used to block the reflected rays and marginal ineffective rays of the fifth spacer, reducing the stray light risk.

[0077] In an exemplary embodiment, the maximum length L of the lens barrel in the direction of the optical axis, the total effective focal length f of the imaging lens, and the f-number FNO of the imaging lens may satisfy: 3.9 < L / f × FNO < 4.8. By controlling the above conditional expression, the total effective focal length and the f-number of the imaging lens can be respectively constrained within a reasonable range, while restricting the reasonable distribution of each lens in the total length of the lens barrel.

[0078] In an exemplary embodiment, the maximum effective semi-aperture DT52 of the image side of the fifth lens, the maximum effective semi-aperture DT61 of the object side of the sixth lens, the inner diameter d5s of the object side of the fifth spacer, and the inner diameter d5m of the image side of the fifth spacer may satisfy: 5.0 < d5s / DT52 + d5m / DT61 < 6.0. By controlling the above conditional expression, it is possible to constrain the maximum effective semi-apertures of the image side of the fifth lens and the object side of the sixth lens, and effectively control the smoothness of the light rays at the edge between the fifth lens and the sixth lens. At the same time, by cooperating with restricting the inner diameters of the object side and the image side of the fifth spacer, it is possible to effectively constrain the misalignment amount of the two lens structures and the abutment misalignment amount between the fifth spacer and the front and rear lenses, and improve the assembly stability of the camera lens.

[0079] In an exemplary embodiment, the on-axis distance SG52 between the intersection of the image side of the fifth lens and the optical axis and the object side of the fifth spacer, the on-axis distance SG61 between the intersection of the object side of the sixth lens and the optical axis and the image side of the fifth spacer, and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 0.6 < (|SG52| + |SG61|) / CT5 < 1.1. By controlling the above conditional expression, it is possible to constrain the surface shape trend of the image side of the fifth lens and the object side of the sixth lens, which is beneficial to controlling the light ray trend at the rear end of the camera lens. At the same time, by cooperating with restricting the central thickness of the fifth lens, it is possible to reduce the forming difficulty of the fifth lens and is beneficial to the forming of the fifth lens.

[0080] In an exemplary embodiment, the f-number FNO of the camera lens may satisfy: 1.3 < FNO < 1.5. Reasonably configuring the f-number of the camera lens is beneficial for the camera lens to achieve a large aperture.

[0081] In an exemplary embodiment, half of the maximum field of view Semi-FOV of the camera lens may satisfy: 50° < Semi-FOV < 65°. Reasonably configuring half of the maximum field of view of the camera lens is beneficial for the camera lens to achieve a large field of view.

[0082] The camera lens according to the above embodiment of the present application may employ six lenses and at least one spacer. By reasonably allocating the parameters of each lens, barrel, and each spacer, it is beneficial for the processing and forming of the camera lens, and can reduce the stray light risk of the camera lens, improve the assembly stability, assembly yield, and imaging quality of the camera lens.

[0083] In an embodiment of the present application, at least one of the surfaces of each lens among the first lens to the sixth lens is an aspherical surface. The characteristic of an aspherical lens is that the curvature continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, both the object side surface and the image side surface of each lens among the first lens to the sixth lens are aspherical surfaces.

[0084] The second aspect of the present application provides a camera lens, which includes a lens barrel, a six-piece lens group, and a spacer group disposed in the lens barrel. The six-piece lens group includes a first lens with a negative focal power, a second lens with a positive focal power, a third lens with a positive focal power, a fourth lens with a negative focal power, a fifth lens with a positive focal power, and a sixth lens with a negative focal power arranged in sequence from the object side to the image side along the optical axis. The spacer group includes a fifth spacer disposed on the image side surface of the fifth lens and in contact with the image side surface of the fifth lens.

[0085] Among them, the maximum effective semi-aperture DT52 of the image side surface of the fifth lens, the maximum effective semi-aperture DT61 of the object side surface of the sixth lens, the inner diameter d5s of the object side surface of the fifth spacer, and the inner diameter d5m of the image side surface of the fifth spacer can satisfy: 5.0 < d5s / DT52 + d5m / DT61 < 6.0. By controlling the above conditional formula, it is possible to constrain the maximum effective semi-apertures of the image side surface of the fifth lens and the object side surface of the sixth lens, and effectively control the smoothness of the light rays at the edge between the fifth lens and the sixth lens; at the same time, by restricting the inner diameters of the object side surface and the image side surface of the fifth spacer, it is possible to effectively constrain the misalignment amount of the two lens structures and the misalignment amount of the fifth spacer in contact with the front and rear lenses, and improve the assembly stability of the camera lens.

[0086] The third aspect of the present application provides a camera lens, which includes a lens barrel, a six-piece lens group, and a spacer group disposed in the lens barrel. The six-piece lens group includes a first lens with a negative focal power, a second lens with a positive focal power, a third lens with a positive focal power, a fourth lens with a negative focal power, a fifth lens with a positive focal power, and a sixth lens with a negative focal power arranged in sequence from the object side to the image side along the optical axis. The spacer group includes a second spacer disposed on the image side surface of the second lens and in contact with the image side surface of the second lens, and a fifth spacer disposed on the image side surface of the fifth lens and in contact with the image side surface of the fifth lens.

[0087] Among them, the combined focal length f345 of the third lens, the fourth lens and the fifth lens, the inner diameter d2m of the image side of the second spacer and the inner diameter d5s of the object side of the fifth spacer can satisfy: 1.1<(d5s-d2m) / f345<1.8. By controlling the above conditional expression, the combined focal length of the third lens, the fourth lens and the fifth lens can be constrained within a certain range, the direction of light in these three lenses can be effectively controlled, and the total optical length of the camera lens can be coordinated to reserve enough space for the design of the first lens, the second lens and the sixth lens; at the same time, by limiting the inner diameter of the image side of the second spacer and the object side of the fifth spacer, it can be ensured that the second spacer and the fifth spacer block non-imaging light and reduce the risk of stray light in the camera lens.

[0088] Those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses and spacers constituting the camera lens can be changed to obtain the various results and advantages described in this specification.

[0089] Specific embodiments of the imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0090] Example 1

[0091] The following reference Figure 3 An imaging lens according to Embodiment 1 of the present application is described.

[0092] like Figure 3 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b. The spacer can block the excess light in the imaging process from entering the next lens, and at the same time make the lens and the lens barrel better supported, thereby enhancing the structural stability of the camera lens.

[0093] The first lens E1 has negative power, its object side surface S1 is concave, and the image side surface S2 is convex. The second lens E2 has positive power, its object side surface S3 is convex, and the image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and the image side surface S6 is convex. The fourth lens E4 has negative power, its object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive power, its object side surface S9 is convex, and the image side surface S10 is convex. The sixth lens E6 has negative power, its object side surface S11 is convex, and the image side surface S12 is concave. In the example, a filter may be further provided between the sixth lens E6 and the imaging surface S15 (not shown), and the filter has an object side surface S13 (not shown) and an image side surface S14 (not shown). The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0094] Table 2 shows the basic parameters of the camera lens of Example 1, wherein the units of the curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0095]

[0096]

[0097] Table 2

[0098] In this embodiment, the total effective focal length f of the camera lens is 2.63 mm, the aperture number FNO of the camera lens is 1.45, and the half of the maximum field of view angle Semi-FOV of the camera lens is 54.84°.

[0099] In this embodiment, the object side surface and the image side surface of any lens among the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0100]

[0101] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 2 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 3 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A26 , A 28 and A 30 .

[0102]

[0103]

[0104] Table 3

[0105] Example 2

[0106] The following reference Figure 4 An imaging lens according to Embodiment 2 of the present application is described.

[0107] like Figure 4 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b.

[0108] The structure of the lens of this embodiment is the same as that of the lens of Embodiment 1, that is, the basic parameter table of the camera lens of this embodiment is the same as Table 2, and the aspheric coefficient table is the same as Table 3. The difference between this embodiment and Embodiment 1 is that the structural dimensions of at least some of the elements in the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, the fifth spacer P5, and the fifth auxiliary spacer P5b are different.

[0109] Example 3

[0110] The following reference Figure 5 An imaging lens according to Embodiment 3 of the present application is described.

[0111] like Figure 5 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b.

[0112] The structure of the lens of this embodiment is the same as that of the lens of Embodiment 1, that is, the basic parameter table of the camera lens of this embodiment is the same as Table 2, and the aspheric coefficient table is the same as Table 3. The difference between this embodiment and Embodiment 1 is that the structural dimensions of at least some of the elements in the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, the fifth spacer P5, and the fifth auxiliary spacer P5b are different.

[0113] Fig. 6A The axial chromatic aberration curves of the camera lenses of Examples 1, 2, and 3 are shown, which indicate the deviation of the focusing point of light rays of different wavelengths after passing through the camera lenses. Figure 6B The astigmatism curves of the camera lenses of Examples 1, 2, and 3 are shown, which represent the meridional image curvature and sagittal image curvature corresponding to different field angles. Figure 6C The distortion curves of the camera lenses of Examples 1, 2, and 3 are shown, which represent the distortion values ​​corresponding to different field angles. FIG. 6A to FIG. 6C It can be seen that the camera lenses provided in Examples 1, 2 and 3 can achieve good imaging quality.

[0114] Example 4

[0115] The following reference Figure 7 An imaging lens according to Embodiment 4 of the present application is described.

[0116] like Figure 7 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b. The spacer can block the excess light in the imaging process from entering the next lens, and at the same time make the lens and the lens barrel better supported, thereby enhancing the structural stability of the camera lens.

[0117] The first lens E1 has negative power, its object side surface S1 is concave, and the image side surface S2 is convex. The second lens E2 has positive power, its object side surface S3 is convex, and the image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and the image side surface S6 is convex. The fourth lens E4 has negative power, its object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive power, its object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has negative power, its object side surface S11 is convex, and the image side surface S12 is concave. In the example, a filter may be further provided between the sixth lens E6 and the imaging surface S15 (not shown), and the filter has an object side surface S13 (not shown) and an image side surface S14 (not shown). The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0118] Table 4 shows the basic parameters of the camera lens of Example 4, wherein the units of the curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0119]

[0120] Table 4

[0121] In this embodiment, the total effective focal length f of the camera lens is 2.71 mm, the aperture number FNO of the camera lens is 1.44, and the half of the maximum field of view angle Semi-FOV of the camera lens is 54.64°.

[0122] In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces. Table 5 lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A2 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0123] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.57E-01 -1.72E-01 1.67E-01 -1.29E-01 7.83E-02 -3.64E-02 1.29E-02 S2 4.18E-01 -1.06E+00 2.32E+00 -3.87E+00 4.79E+00 -4.38E+00 2.95E+00 S3 2.10E-01 -6.46E-01 1.14E+00 -4.95E-01 -2.85E+00 8.46E+00 -1.29E+01 S4 2.58E-02 -7.63E-02 1.15E+00 -5.04E+00 6.16E+00 4.23E+01 -2.51E+02 S5 3.99E-02 -7.12E-01 7.37E+00 -4.64E+01 1.93E+02 -5.51E+02 1.12E+03 S6 -5.28E-02 -1.31E-01 1.20E+00 -5.01E+00 1.39E+01 -2.74E+01 3.87E+01 S7 -2.93E-01 3.89E-01 -1.11E+00 3.25E+00 -6.78E+00 9.82E+00 -1.02E+01 S8 -1.15E-01 2.46E-01 -7.21E-01 1.37E+00 -1.73E+00 1.58E+00 -1.08E+00 S9 1.35E-02 2.45E-01 -9.12E-01 1.60E+00 -1.76E+00 1.34E+00 -7.29E-01 S10 1.65E-01 -2.50E-01 2.48E-01 -1.60E-01 5.57E-02 2.61E-03 -1.42E-02 S11 7.93E-02 -1.31E-01 1.34E-01 -9.49E-02 4.72E-02 -1.69E-02 4.37E-03 S12 1.37E-03 -2.50E-03 2.48E-03 -4.03E-03 3.16E-03 -1.44E-03 4.29E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.44E-03 6.84E-04 -9.97E-05 1.03E-05 -7.11E-07 2.95E-08 -5.54E-10 S2 -1.47E+00 5.38E-01 -1.42E-01 2.63E-02 -3.22E-03 2.34E-04 -7.56E-06 S3 1.28E+01 -8.77E+00 4.22E+00 -1.40E+00 3.07E-01 -3.97E-02 2.31E-03 S4 6.84E+02 -1.15E+03 1.29E+03 -9.55E+02 4.53E+02 -1.25E+02 1.52E+01 S5 -1.64E+03 1.74E+03 -1.32E+03 6.99E+02 -2.45E+02 5.08E+01 -4.75E+00 S6 -3.98E+01 2.97E+01 -1.58E+01 5.90E+00 -1.45E+00 2.13E-01 -1.40E-02 S7 7.60E+00 -4.13E+00 1.61E+00 -4.38E-01 7.90E-02 -8.50E-03 4.13E-04 S8 5.64E-01 -2.24E-01 6.62E-02 -1.41E-02 2.02E-03 -1.75E-04 6.86E-06 S9 2.91E-01 -8.54E-02 1.82E-02 -2.75E-03 2.79E-04 -1.71E-05 4.77E-07 S10 8.24E-03 -2.74E-03 5.99E-04 -8.78E-05 8.33E-06 -4.64E-07 1.15E-08 S11 -8.31E-04 1.15E-04 -1.16E-05 8.11E-07 -3.78E-08 1.05E-09 -1.31E-11 S12 -8.77E-05 1.25E-05 -1.25E-06 8.54E-08 -3.80E-09 9.92E-11 -1.15E-12

[0124] Table 5

[0125] Example 5

[0126] The following reference Figure 8 An imaging lens according to Embodiment 5 of the present application is described.

[0127] like Figure 8 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b.

[0128] The structure of the lens of this embodiment is the same as that of the lens of Embodiment 4, that is, the basic parameter table of the camera lens of this embodiment is the same as Table 4, and the aspheric coefficient table is the same as Table 5. The difference between this embodiment and Embodiment 4 is that the structural dimensions of at least some of the elements in the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, the fifth spacer P5, and the fifth auxiliary spacer P5b are different.

[0129] Example 6

[0130] The following reference Fig. 9 An imaging lens according to Embodiment 6 of the present application is described.

[0131] like Fig. 9 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b.

[0132] The structure of the lens of this embodiment is the same as that of the lens of Embodiment 4, that is, the basic parameter table of the camera lens of this embodiment is the same as Table 4, and the aspheric coefficient table is the same as Table 5. The difference between this embodiment and Embodiment 4 is that the structural dimensions of at least some of the elements in the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, the fifth spacer P5, and the fifth auxiliary spacer P5b are different.

[0133] Fig. 10A The axial chromatic aberration curves of the camera lenses of Examples 4, 5, and 6 are shown, which indicate the deviation of the focusing point of light rays of different wavelengths after passing through the camera lenses. Fig. 10BThe astigmatism curves of the camera lenses of Examples 4, 5, and 6 are shown, which represent the meridional image curvature and sagittal image curvature corresponding to different field angles. Fig. 10C The distortion curves of the camera lenses of Examples 4, 5, and 6 are shown, which represent the distortion values ​​corresponding to different field angles. FIG. 10A to FIG. 10C It can be seen that the camera lenses provided in Examples 4, 5 and 6 can achieve good imaging quality.

[0134] Example 7

[0135] The following reference Fig.11 An imaging lens according to Embodiment 7 of the present application is described.

[0136] like Fig.11 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b. The spacer can block the excess light in the imaging process from entering the next lens, and at the same time make the lens and the lens barrel better supported, thereby enhancing the structural stability of the camera lens.

[0137] The first lens E1 has negative power, its object side surface S1 is concave, and the image side surface S2 is convex. The second lens E2 has positive power, its object side surface S3 is convex, and the image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and the image side surface S6 is convex. The fourth lens E4 has negative power, its object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive power, its object side surface S9 is convex, and the image side surface S10 is convex. The sixth lens E6 has negative power, its object side surface S11 is convex, and the image side surface S12 is concave. In the example, a filter may be further provided between the sixth lens E6 and the imaging surface S15 (not shown), and the filter has an object side surface S13 (not shown) and an image side surface S14 (not shown). The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0138] Table 6 shows the basic parameters of the camera lens of Example 7, wherein the units of the curvature radius, thickness / distance, and focal length are all millimeters (mm).

[0139]

[0140]

[0141] Table 6

[0142] In this embodiment, the total effective focal length f of the camera lens is 2.53 mm, the aperture number FNO of the camera lens is 1.45, and the half of the maximum field of view angle Semi-FOV of the camera lens is 57.00°.

[0143] In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces. Table 7 lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A2 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0144] Face number A4 A6 A8 A10 A12 A14 A16 S1 5.08E-02 -2.14E-02 8.14E-03 -2.60E-03 6.95E-04 -1.55E-04 2.85E-05 S2 1.73E-01 -1.02E-01 1.32E-02 1.14E-01 -2.30E-01 2.68E-01 -2.17E-01 S3 8.58E-02 -1.10E-01 7.98E-02 7.39E-02 -3.26E-01 5.12E-01 -4.91E-01 S4 5.67E-02 -4.83E-01 3.35E+00 -1.54E+01 4.87E+01 -1.09E+02 1.77E+02 S5 1.54E-02 -2.16E-01 1.37E+00 -5.42E+00 1.42E+01 -2.58E+01 3.31E+01 S6 -4.76E-02 -5.50E-02 5.22E-01 -2.15E+00 5.83E+00 -1.11E+01 1.52E+01 S7 -9.25E-02 5.13E-02 -3.70E-01 1.52E+00 -3.71E+00 6.11E+00 -7.10E+00 S8 -2.73E-02 -7.82E-02 1.45E-01 -1.52E-01 1.22E-01 -8.34E-02 4.93E-02 S9 4.53E-02 -8.76E-02 7.68E-02 -2.52E-02 -1.75E-02 2.77E-02 -1.84E-02 S10 1.08E-01 -1.14E-01 8.21E-02 -4.59E-02 2.26E-02 -1.17E-02 6.14E-03 S11 7.02E-02 -1.20E-01 1.14E-01 -7.83E-02 3.83E-02 -1.31E-02 3.07E-03 S12 -4.92E-03 -1.61E-02 1.99E-02 -1.70E-02 1.00E-02 -4.07E-03 1.16E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.20E-06 4.81E-07 -4.14E-08 2.57E-09 -1.08E-10 2.74E-12 -3.16E-14 S2 1.27E-01 -5.40E-02 1.66E-02 -3.58E-03 5.15E-04 -4.41E-05 1.70E-06 S3 3.15E-01 -1.39E-01 4.33E-02 -9.67E-03 1.59E-03 -1.86E-04 1.15E-05 S4 -2.09E+02 1.79E+02 -1.11E+02 4.82E+01 -1.39E+01 2.39E+00 -1.86E-01 S5 -3.03E+01 1.98E+01 -8.97E+00 2.72E+00 -5.07E-01 4.84E-02 -1.33E-03 S6 -1.51E+01 1.09E+01 -5.65E+00 2.05E+00 -4.94E-01 7.09E-02 -4.58E-03 S7 5.95E+00 -3.62E+00 1.58E+00 -4.84E-01 9.83E-02 -1.19E-02 6.50E-04 S8 -2.43E-02 9.42E-03 -2.72E-03 5.59E-04 -7.65E-05 6.24E-06 -2.30E-07 S9 7.83E-03 -2.31E-03 4.82E-04 -7.02E-05 6.82E-06 -3.98E-07 1.05E-08 S10 -2.70E-03 8.78E-04 -2.01E-04 3.14E-05 -3.17E-06 1.86E-07 -4.86E-09 S11 -4.59E-04 3.36E-05 1.46E-06 -6.18E-07 6.41E-08 -3.18E-09 6.45E-11 S12 -2.37E-04 3.46E-05 -3.58E-06 2.56E-07 -1.21E-08 3.38E-10 -4.23E-12

[0145] Table 7

[0146] Example 8

[0147] The following reference Fig.12 The imaging lens according to Embodiment 8 of the present application is described.

[0148] like Fig.12 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b.

[0149] The structure of the lens of this embodiment is the same as that of the lens of Embodiment 7, that is, the basic parameter table of the camera lens of this embodiment is the same as Table 6, and the aspheric coefficient table is the same as Table 7. The difference between this embodiment and Embodiment 7 is that the structural dimensions of at least some of the elements in the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, the fifth spacer P5, and the fifth auxiliary spacer P5b are different.

[0150] Example 9

[0151] The following reference Fig.13 An imaging lens according to Embodiment 9 of the present application is described.

[0152] like Fig.13 As shown, the camera lens includes a lens barrel and a six-piece lens group and a spacer group placed in the lens barrel. The six-piece lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. The aperture STO can be arranged between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5 and a fifth auxiliary spacer P5b.

[0153] The structure of the lens of this embodiment is the same as that of the lens of Embodiment 7, that is, the basic parameter table of the camera lens of this embodiment is the same as Table 6, and the aspheric coefficient table is the same as Table 7. The difference between this embodiment and Embodiment 7 is that the structural dimensions of at least some of the elements in the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, the fifth spacer P5, and the fifth auxiliary spacer P5b are different.

[0154] Fig.14A The axial chromatic aberration curves of the camera lenses of Examples 7, 8, and 9 are shown, which indicate the deviation of the focusing point of light rays of different wavelengths after passing through the camera lenses. Fig. 14B The astigmatism curves of the camera lenses of Examples 7, 8, and 9 are shown, which represent the meridional image curvature and sagittal image curvature corresponding to different field angles. Fig. 14C The distortion curves of the camera lenses of Examples 7, 8, and 9 are shown, which represent the distortion values ​​corresponding to different field angles. FIG. 14A to FIG. 14C It can be seen that the camera lenses provided in Examples 7, 8 and 9 can achieve good imaging quality.

[0155] Table 8 shows the values ​​of parameters such as d1m, D1m, d2m, D2m, d3s, d3m, D3m, d4s, d5s, d5m, d5bs, EP01, EP12, CP2, EP23, CP3, EP34, EP45, CP5, L, SG52, SG61, DT52, and DT61 in each of Examples 1 to 9. The above parameters can be calculated according to Figure 1A or Figure 1B The units of the parameters listed in Table 8 are all mm.

[0156]

[0157]

[0158] Table 8 and Table 9 show the values ​​of the conditional expressions of each embodiment in Embodiments 1 to 9.

[0159] Conditional / Example 1 2 3 4 5 6 7 8 9 f1 / f3 -1.87 -1.87 -1.87 -1.82 -1.82 -1.82 -1.89 -1.89 -1.89 f / (f5+f6) -1.68 -1.68 -1.68 -1.38 -1.38 -1.38 -2.64 -2.64 -2.64 (EP45+CP5) / (CT5+T45) 1.36 1.36 1.31 1.34 1.34 1.29 0.83 0.84 0.78 CT5 / EP45 3.16 2.86 3.25 2.35 2.23 2.41 3.00 2.91 2.89 (f5+f6) / d5bs -0.23 -0.23 -0.23 -0.30 -0.30 -0.30 -0.17 -0.17 -0.17 (d5s-d2m) / f345 1.27 1.71 1.67 1.27 1.38 1.45 1.53 1.69 1.71 (CT2+T23) / (EP12+CP2) 2.48 2.44 2.41 2.99 3.20 2.69 2.13 2.00 2.23 (EP23+CT3) / (T23+T34) 1.27 1.29 1.29 2.21 2.17 2.14 1.16 1.14 1.08 CP3 / (T34+CT4) 0.60 0.55 0.53 0.53 0.61 0.68 0.55 0.56 0.61 L / f×FNO 4.52 4.49 4.55 4.04 4.01 4.07 4.75 4.71 4.78 (D2m-d2m) / (D3m-d3m) 1.57 4.19 3.74 3.70 3.27 3.91 5.15 4.73 4.38 EP01 / (CT1+T12) 1.77 1.71 1.78 2.52 2.58 2.47 1.34 1.27 1.38 D3m / (EP34+CT3) 3.99 4.09 3.89 3.02 3.10 3.02 4.34 4.45 4.17 f1 / R2 0.96 0.96 0.96 1.64 1.64 1.64 0.99 0.99 0.99 D1m / d1m 2.15 2.16 2.15 2.00 1.99 2.04 2.55 2.49 2.53 f4 / f3+d4s / d3s -1.15 -1.15 -1.12 -0.66 -0.65 -0.65 -1.91 -1.92 -1.88 d5s / DT52+d5m / DT61 5.39 5.86 5.79 5.12 5.26 5.36 5.72 5.87 5.88 (|SG52|+|SG61|) / CT5 1.05 1.02 1.01 0.93 0.91 0.88 0.73 0.76 0.73

[0160] Table 9

[0161] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens described above.

[0162] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other.

Claims

1. A camera lens, characterized in that: Comprising: A six-piece lens group, including a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power, which are arranged in sequence from the object side to the image side along the optical axis; A spacer group, including a fourth spacer placed on and in contact with the image side surface of the fourth lens and a fifth spacer placed on and in contact with the image side surface of the fifth lens; And A lens barrel, in which the six-piece lens group and the spacer group are placed; Wherein, the axial interval distance between the non-effective diameter portions of the fifth lens and the sixth lens is greater than the axial interval distance between the non-effective diameter portions of any two adjacent lenses among the first lens to the fifth lens; The effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: -2.0 < f1 / f3 < -1.7; The total effective focal length f of the camera lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: -2.7 < f / (f5 + f6) < -1.2; The central thickness CT5 of the fifth lens on the optical axis and the axial interval EP45 between the fourth spacer and the fifth spacer satisfy: 2.2 < CT5 / EP45 < 3.4; and The air interval T45 between the fourth lens and the fifth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the axial interval EP45 between the fourth spacer and the fifth spacer, and the maximum thickness CP5 of the fifth spacer satisfy: 0.5 < (EP45 + CP5) / (CT5 + T45) < 1.

4.

2. The imaging lens according to claim 1, wherein: The spacer group further includes a first spacer placed on and in contact with the image side surface of the first lens; Wherein, the axial interval EP01 between the object side end surface of the lens barrel and the first spacer, the central thickness CT1 of the first lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis satisfy: 1.0 < EP01 / (CT1 + T12) < 2.

7.

3. The imaging lens according to claim 1, wherein: The spacer group further includes a first spacer placed on and in contact with the image side surface of the first lens; Wherein, the effective focal length f1 of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 0.8 < f1 / R2 < 1.8; the inner diameter d1m of the image side surface of the first spacer and the outer diameter D1m of the image side surface of the first spacer satisfy: 1.8 < D1m / d1m < 2.

6.

4. The imaging lens according to claim 1, wherein: The spacer group further includes a second spacer placed on and in contact with the image side surface of the second lens; Among them, the combined focal length f345 of the third lens, the fourth lens and the fifth lens, the inner diameter d2m of the image side surface of the second spacer and the inner diameter d5s of the object side surface of the fifth spacer satisfy: 1.1<(d5s-d2m) / f345<1.

8.

5. The imaging lens according to claim 1, wherein: The spacer group further includes a first spacer disposed on the image side surface of the first lens and in contact with the image side surface of the first lens, and a second spacer disposed on the image side surface of the second lens and in contact with the image side surface of the second lens; Among them, the center thickness CT2 of the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, the interval EP12 between the first spacer and the second spacer along the optical axis and the maximum thickness CP2 of the second spacer satisfy: 1.7<(CT2+T23) / (EP12+CP2)<3.

3.

6. The imaging lens according to claim 1, wherein: The spacer group further includes a second spacer disposed on the image side surface of the second lens and in contact with the image side surface of the second lens, and a third spacer disposed on the image side surface of the third lens and in contact with the image side surface of the third lens; Among them, the air gap T23 between the second lens and the third lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the interval EP23 between the second spacer and the third spacer along the optical axis satisfy: 1.0<(EP23+CT3) / (T23+T34)<2.

3.

7. The imaging lens according to claim 1, wherein: The spacer group further includes a second spacer disposed on the image side surface of the second lens and in contact with the image side surface of the second lens, and a third spacer disposed on the image side surface of the third lens and in contact with the image side surface of the third lens; Among them, the inner diameter d2m of the image side surface of the second spacer, the outer diameter D2m of the image side surface of the second spacer, the inner diameter d3m of the image side surface of the third spacer and the outer diameter D3m of the image side surface of the third spacer satisfy: 1.4<(D2m-d2m) / (D3m-d3m)<5.

3.

8. The imaging lens according to claim 1, wherein: The spacer group further includes a third spacer disposed on the image side surface of the third lens and in contact with the image side surface of the third lens; The air gap T34 between the third lens and the fourth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis and the maximum thickness CP3 of the third spacer satisfy: 0.4 <CP3 / (T34+CT4)<0.8。 9. The imaging lens according to claim 1, wherein: The spacer group further includes a third spacer disposed on the image side surface of the third lens and in contact with the image side surface of the third lens; The central thickness CT3 of the third lens on the optical axis, the outer diameter D3m of the image side surface of the third spacer, and the interval EP34 between the third spacer and the fourth spacer along the optical axis satisfy: 3.0 <D3m / (EP34+CT3)<4.5。 10. The imaging lens according to claim 1, wherein: The spacer group further includes a third spacer disposed on the image side surface of the third lens and in contact with the image side surface of the third lens; The effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the inner diameter d3s of the object side surface of the third spacer, and the inner diameter d4s of the object side surface of the fourth spacer satisfy: -2.0 <f4 / f3+d4s / d3s<-0.5。 11. The camera lens according to any one of claims 1 to 10, characterized in that: The spacer set further includes a fifth auxiliary spacer disposed on the image side surface of the fifth spacer and in contact with the image side surface of the fifth spacer; The effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the inner diameter d5bs of the object side surface of the fifth auxiliary spacer satisfy: -0.5<(f5+f6) / d5bs<0.

12. The camera lens according to any one of claims 1 to 10, characterized in that: The maximum length L of the lens barrel along the direction of the optical axis, the total effective focal length f of the camera lens and the aperture number FNO of the camera lens satisfy: 3.9 <L / f×FNO<4.8。 13. The camera lens according to any one of claims 1 to 10, characterized in that: The maximum effective half-aperture DT52 of the image side surface of the fifth lens, the maximum effective half-aperture DT61 of the object side surface of the sixth lens, the inner diameter d5s of the object side surface of the fifth spacer and the inner diameter d5m of the image side surface of the fifth spacer satisfy: 5.0 <d5s / DT52+d5m / DT61<6.0。 14. The camera lens according to any one of claims 1 to 10, characterized in that: The on-axis distance SG52 between the intersection of the image side surface of the fifth lens and the optical axis and the object side surface of the fifth spacer, the on-axis distance SG61 between the intersection of the object side surface of the sixth lens and the optical axis and the image side surface of the fifth spacer, and the center thickness CT5 of the fifth lens on the optical axis satisfy: 0.6<(|SG52|+|SG61|) / CT5<1.1.

Images