Camera lens

Abstract

The application discloses a camera lens, which comprises a lens barrel, a lens set and a plurality of spacer elements, the lens set comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from an object side to an image side along an optical axis, wherein the fifth lens has positive refractive power, and the sixth lens has negative refractive power; the opening diameter of the object side end surface of the lens barrel is smaller than the opening diameter of the image side end surface; the plurality of spacer elements comprises a fourth spacer element located on the image side of the fourth lens and in contact with the image side surface of the fourth lens. The effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the inner diameter d0m of the image side end surface of the lens barrel and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: 0.5<(f5+f6) / (d0m-d4s)<5.5.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to a camera lens. Background Technology

[0002] In recent years, with the development of science and technology, high-performance mobile phone lenses have become increasingly popular, and people's requirements for mobile phone photography have continued to rise. At the same time, the industry's requirements for camera lenses are also getting higher and higher.

[0003] Taking the widely used six-element lens as an example, in order to meet the market's high requirements for lens optical performance, the issue of how to further improve the assembly performance stability of a camera lens composed of six elements is becoming increasingly prominent; the presence of stray light between the elements also has a serious impact on the lens image quality, with stray light being particularly noticeable at the edges of the fifth and sixth elements located at the end; in addition, in order to achieve matching between different lens sizes, the lens head structure needs to be further miniaturized, while at the same time achieving a certain level of illumination to ensure image quality.

[0004] Therefore, in response to these current problems, those skilled in the art are dedicated to researching how to optimize lens design. This includes not only the rational design and matching of the relevant optical parameters of each optical element that makes up the lens, but also the optimization design of structural components that make up the camera lens, such as the lens barrel and spacer elements. The aim is to improve the problem of stray light generated in the vicinity of the fifth and sixth lens elements, while also achieving goals such as reducing the size of the lens end structure, improving the stability of lens assembly performance, and improving the image quality of the lens, so that the camera lens can meet the ever-evolving high demands of the market. Summary of the Invention

[0005] This application provides a camera lens, which may include a lens barrel and a lens group and a plurality of spacer elements housed within the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side, wherein the fifth lens has positive optical power and the sixth lens has negative optical power. The opening diameter of the object-side end face of the lens barrel is smaller than the opening diameter of its image-side end face. The plurality of spacer elements includes a fourth spacer element located on the image side of the fourth lens and in contact with the image-side surface of the fourth lens. The effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the inner diameter d0m of the image-side end face of the lens barrel, and the inner diameter d4s of the object-side surface of the fourth spacer element can satisfy: 0.5 < (f5 + f6) / (d0m - d4s) < 5.5.

[0006] In one embodiment, the outer diameter D4s of the object side of the fourth spacer element, the air gap T45 between the fourth lens and the fifth lens on the optical axis, and the refractive index N4 of the fourth lens can satisfy: 5 < (D4s - d4s) / (T45 × (N4 - 1)) < 10.

[0007] In one embodiment, the plurality of spacers further includes: a second spacer located on the image side of the second lens and in contact with the image side of the second lens; the effective focal length f2 of the second lens, the outer diameter D2m of the image side of the second spacer, and the inner diameter d2s of the object side of the second spacer can satisfy: -7.5≤f2 / (D2m-d2s)≤-1.5.

[0008] In one embodiment, the plurality of spacers further includes: a sixth spacer, located on the image side of the sixth lens and in contact with the image side of the sixth lens; the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the distance EP46 from the image side of the fourth spacer to the object side of the sixth spacer along the optical axis can satisfy: 7.5≤(f5-f6) / EP46<35.

[0009] In one embodiment, the maximum outer diameter D6 of the sixth spacer element, the air gap T56 between the fifth and sixth lenses on the optical axis, and the refractive index N5 of the fifth lens can satisfy: 3.5 < (D6 - d4s) / (T56 × (N5 - 1)) < 9.0.

[0010] In one embodiment, the maximum outer diameter D6 of the sixth spacer element can satisfy: 1.5 <f5 / (D6-d4s)<7.0。

[0011] In one embodiment, among the first to the fifth lenses, the object-side surface of the i-th lens is concave, and the radius of curvature R of the object-side surface of the i-th lens is... (2i-1) The radius of curvature R of the image-side surface of the i-th lens 2i The inner diameter dis of the object side of the i-th spacer element, located on the image side of the i-th lens and in contact with the image side of the i-th lens, can satisfy: -40 < (R (2i-1) +R 2i ) / dis<-1.0, where i is taken from 1, 2, 3, 4, 5.

[0012] In one embodiment, among the first to the fourth lenses, the air gap between any two adjacent lenses on the optical axis is less than 0.3 mm, and the j-th spacer element is a spacer element located on the image side of the j-th lens and in contact with the image side surface of the j-th lens, and the (j+1)-th spacer element is a spacer element located on the image side of the (j+1)-th lens and in contact with the image side surface of the (j+1)-th lens, and the distance EP along the optical axis from the image side surface of the j-th spacer element to the object side surface of the (j+1)-th spacer element is... j(j+1) The air gap T between the j-th lens and the (j+1)-th lens on the optical axis j(j+1) The center thickness CT of the (j+1)th lens on the optical axis (j+1) It can satisfy: 0.3 <EP j(j+1) / (T j(j+1) +CT (j+1) )<1.5, where j is taken from 1, 2, 3, 4.

[0013] In one embodiment, the maximum thickness L of the lens barrel along the optical axis, the entrance pupil diameter EPD of the camera lens, and the distance Td from the object side of the first lens to the image side of the sixth lens on the optical axis can satisfy: 2.5 < (d0m / EPD) × (L / Td) < 5.0.

[0014] In one embodiment, the outer diameter D0m of the image-side end face of the lens barrel, the inner diameter d0s of the object-side end face of the lens barrel, and the effective focal length f of the camera lens can satisfy: 0.9 < (D0m - d0s) / f < 2.0.

[0015] In one embodiment, the plurality of spacers further includes: a first spacer located on the image side of the first lens and in contact with the image side of the first lens; and a third spacer located on the image side of the third lens and in contact with the image side of the third lens; the effective focal length f of the camera lens, the distance EP12 from the image side of the first spacer to the object side of the second spacer along the optical axis, the distance EP23 from the image side of the second spacer to the object side of the third spacer along the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis can satisfy: 9.0 <f / (EP12+EP23-T23)<15。

[0016] In one embodiment, the outer diameter D3s of the object side of the third spacer, the maximum thickness CP3 of the third spacer along the direction parallel to the optical axis, the distance EP34 from the image side of the third spacer to the object side of the fourth spacer along the optical axis, and the center thickness CT4 of the fourth lens on the optical axis can satisfy: 10 <D3s / (CP3+EP34-CT4)<45。

[0017] In one embodiment, the plurality of spacers further includes: a fifth spacer located on the image side of the fifth lens and in contact with the image side of the fifth lens; and a sixth spacer located on the image side of the sixth lens and in contact with the image side of the sixth lens; wherein the inner diameter of the object side of the second spacer is the smallest among the inner diameters of the object side of each spacer from the first spacer to the sixth spacer.

[0018] The camera lens provided in this application includes a six-element imaging lens group, multiple spacer elements, and a lens barrel. The first to sixth lenses are arranged sequentially along the optical axis from the object side to the image side. The fifth lens has positive optical power, and the sixth lens has negative optical power. The opening diameter of the object-side end face of the lens barrel is smaller than the opening diameter of its image-side end face. A fourth spacer element is disposed on the image side of the fourth lens, contacting its image side. Furthermore, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the inner diameter d0m of the image-side end face of the lens barrel, and the inner diameter d4s of the object-side side face of the fourth spacer element satisfy the condition 0.5 < (f5 + f6) / (d0m - d4s) < 5.5. This arrangement of the camera lens helps control stray light generated at the edges of the fifth and sixth lenses or their adjacent spacer elements. Simultaneously, by increasing the light transmission through the inner diameter of the object-side side face of the fourth spacer element, the relative illumination of the off-axis field of view can be improved. This facilitates the reduction of the lens head structure while ensuring illumination, enabling the matching of different lens sizes. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0020] Figure 1 A schematic diagram showing the structure and some parameters of a camera lens according to an exemplary embodiment of this application is provided;

[0021] Figure 2 A schematic diagram of the lens group included in the camera lens according to Embodiment 1 of this application is shown;

[0022] Figures 3 to 5 Schematic diagrams of the camera lens according to Embodiment 1 of this application are shown in three different implementations.

[0023] Figures 6 to 9 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens of Embodiment 1 are shown respectively.

[0024] Figure 10 A schematic diagram of the lens group included in the camera lens according to Embodiment 2 of this application is shown;

[0025] Figures 11 to 13 Schematic diagrams of the camera lens according to Embodiment 2 of this application are shown in three different implementations.

[0026] Figures 14 to 17 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens in Example 2 are shown respectively.

[0027] Figure 18 A schematic diagram of the lens group included in the camera lens according to Embodiment 3 of this application is shown;

[0028] Figures 19 to 21 Schematic diagrams of the camera lens according to Embodiment 3 of this application are shown in three different implementations.

[0029] Figures 22 to 25 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens in Example 3 are shown respectively.

[0030] Figure 26 A schematic diagram of the lens group included in the camera lens according to Embodiment 4 of this application is shown;

[0031] Figures 27 to 29 Schematic diagrams of the camera lens according to Embodiment 4 of this application are shown in three different embodiments; and

[0032] Figures 30 to 33 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens of Example 4 are shown respectively. Detailed Implementation

[0033] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0034] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0035] In the accompanying 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 illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0036] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0037] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," 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. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0038] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] The features, principles and other aspects of this application are described in detail below.

[0041] A camera lens according to an exemplary embodiment of this application may include a lens barrel and a lens group and a plurality of spacers mounted within the lens barrel. The lens group may be a six-element lens group, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side. The plurality of spacers may include a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens.

[0042] In an exemplary embodiment, the fifth lens may have positive optical power and the sixth lens may have negative optical power.

[0043] In an exemplary embodiment, the opening diameter of the object-side end face of the lens barrel may be smaller than the opening diameter of its image-side end face.

[0044] In an exemplary embodiment, the camera lens of this application can satisfy the condition 0.5 < (f5 + f6) / (d0m - d4s) < 5.5, where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, d0m is the inner diameter of the image-side end face of the lens barrel, and d4s is the inner diameter of the object-side side face of the fourth spacer element.

[0045] The camera lens provided in this application includes a lens barrel and a lens group and multiple spacer elements mounted in the lens barrel. The lens group includes first to sixth lenses arranged sequentially from the object side to the image side along the optical axis. The fifth lens has positive optical power, and the sixth lens has negative optical power. The opening diameter of the object-side end face of the lens barrel is smaller than the opening diameter of its image-side end face. A fourth spacer element is disposed on the image side of the fourth lens, contacting its image side. The effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the inner diameter d0m of the image-side end face of the lens barrel, and the inner diameter d4s of the object-side side face of the fourth spacer element satisfy the condition 0.5 < (f5 + f6) / (d0m - d4s) < 5.5. This arrangement of the camera lens provided in this application helps control stray light generated at the edges of the fifth and sixth lenses or their adjacent spacer elements. Simultaneously, by increasing the light transmission through the inner diameter of the object-side side face of the fourth spacer element, the relative illumination of the off-axis field of view can be improved. This facilitates the reduction of the lens head structure while ensuring illumination, enabling the matching of different lens sizes.

[0046] In an exemplary embodiment, the plurality of spacer elements may further include: a first spacer element located on the image side of the first lens and in contact with the image side of the first lens; a second spacer element located on the image side of the second lens and in contact with the image side of the second lens; a third spacer element located on the image side of the third lens and in contact with the image side of the third lens; a fifth spacer element located on the image side of the fifth lens and in contact with the image side of the fifth lens; and a sixth spacer element located on the image side of the sixth lens and in contact with the image side of the sixth lens.

[0047] In an exemplary embodiment, the camera lens of this application can satisfy the condition 5<(D4s-d4s) / (T45×(N4-1))<10, where D4s is the outer diameter of the object-side surface of the fourth spacer element, d4s is the inner diameter of the object-side surface of the fourth spacer element, T45 is the air gap between the fourth and fifth lenses on the optical axis, and N4 is the refractive index of the fourth lens. By controlling the outer diameter of the object-side surface of the fourth spacer element, the inner diameter of the object-side surface of the fourth spacer element, the air gap between the fourth and fifth lenses on the optical axis, and the refractive index of the fourth lens to satisfy the condition 5<(D4s-d4s) / (T45×(N4-1))<10, the design values ​​of the lens structure can be reasonably controlled. While ensuring the compactness of the lens structure, there is enough space for the design of the rear lens, which is beneficial to reducing the sensitivity of the optical system.

[0048] In an exemplary embodiment, the camera lens of this application can satisfy the condition -7.5≤f2 / (D2m-d2s)≤-1.5, where f2 is the effective focal length of the second lens, D2m is the outer diameter of the image-side surface of the second spacer element, and d2s is the inner diameter of the object-side surface of the second spacer element. By controlling the ratio of the effective focal length of the second lens to the difference between the outer diameter of the image-side surface of the second spacer element and the inner diameter of the object-side surface of the second spacer element to be within this range, excess light between the lenses can be blocked, multiple reflections generated by the effective diameter and structural parts can be prevented, and ghost images and stray light can be avoided.

[0049] In an exemplary embodiment, the camera lens of this application can satisfy the condition 7.5≤(f5-f6) / EP46<35, where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, and EP46 is the distance along the optical axis from the image-side surface of the fourth spacer element to the object-side surface of the sixth spacer element. By controlling the ratio of the difference between the effective focal lengths of the fifth and sixth lenses to the distance along the optical axis from the image-side surface of the fourth spacer element to the object-side surface of the sixth spacer element within this range, the aberrations of the fifth and sixth lenses can be controlled, balancing the aberrations generated by the front-end lens. This helps ensure the imaging level of the optical system. Simultaneously, it helps to reasonably control the center thickness of the fifth and sixth lenses, adjust the coma performance of the system, and contributes to the compactness of the structure.

[0050] In an exemplary embodiment, the camera lens of this application can satisfy the condition 3.5 < (D6 - d4s) / (T56 × (N5 - 1)) < 9.0, where D6 is the maximum outer diameter of the sixth spacer element, d4s is the inner diameter of the object-side surface of the fourth spacer element, T56 is the air gap between the fifth and sixth lenses on the optical axis, and N5 is the refractive index of the fifth lens. By controlling the maximum outer diameter of the sixth spacer element, the inner diameter of the object-side surface of the fourth spacer element, the air gap between the fifth and sixth lenses on the optical axis, and the refractive index of the fifth lens to satisfy the condition 3.5 < (D6 - d4s) / (T56 × (N5 - 1)) < 9.0, the structure can be adjusted to a great extent to ensure that the lens structure has sufficient space during molding, while also effectively ensuring the spacing of the lenses on the central optical axis, thereby improving imaging performance.

[0051] In an exemplary embodiment, the camera lens of the present application can satisfy the condition 1.5 < f5 / (D6 - d4s) < 7.0, where f5 is the effective focal length of the fifth lens, D6 is the maximum outer diameter of the sixth spacer element, and d4s is the inner diameter of the object side surface of the fourth spacer element. By controlling the ratio of the effective focal length of the fifth lens to the difference between the maximum outer diameter of the sixth spacer element and the inner diameter of the object side surface of the fourth spacer element within this range, it is beneficial to meet the optical performance of the imaging system, ensure the light transmission amount while providing light to guarantee the imaging quality, and avoid the formation of ghost images and stray light caused by the reflection of excess light between lenses.

[0052] In an exemplary embodiment, the object side surface of the i-th lens among the first lens to the fifth lens is a concave surface, and the camera lens of the present application can satisfy the condition -40 < (R (2i-1) +R 2i ) / dis < -1.0, where R (2i-1) is the radius of curvature of the object side surface of the i-th lens, R 2i is the radius of curvature of the image side surface of the i-th lens, and dis is the inner diameter of the object side surface of the i-th spacer element located on the image side of the i-th lens and in contact with the image side surface of the i-th lens. i is taken from 1, 2, 3, 4, 5. By controlling the ratio of the sum of the radius of curvature of the object side surface of the i-th lens and the radius of curvature of the image side surface of the i-th lens to the inner diameter of the object side surface of the i-th spacer element within this range, it can ensure that the light transmission amount of the optical system meets the optical requirements, ensure the adjustability of the lens in terms of structure, can match lenses of different sizes, control the turning angle of the edge field surface, enable the lens to reduce the system sensitivity within a certain range, and at the same time avoid the generation of stray light ghost images while the spacer element blocks light.

[0053] In an exemplary embodiment, the air gap between any two adjacent lenses among the first lens to the fourth lens on the optical axis is less than 0.3 mm; among the first lens to the fourth lens, a j-th spacer element in contact with the image side surface of the j-th lens is provided on the image side of the j-th lens, and a (j + 1)-th spacer element in contact with the image side surface of the (j + 1)-th lens is provided on the image side of the (j + 1)-th lens; and the camera lens of the present application can satisfy the condition 0.3 < EP j(j+1) / (T j(j+1) +CT (j+1) ) < 1.5, where EP j(j+1) is the distance along the optical axis from the image side surface of the j-th spacer element to the object side surface of the (j + 1)-th spacer element, T j(j+1) is the air gap between the j-th lens and the (j + 1)-th lens on the optical axis, and CT (j+1)It is the center thickness of the (j+1)th lens on the optical axis, where j is taken from 1, 2, 3, or 4. By controlling the distance along the optical axis from the image side of the j-th spacer element to the object side of the (j+1)-th spacer element, and the ratio of this distance to the sum of the air gaps between the j-th and j+1-th lenses on the optical axis and the center thickness of the (j+1)-th lens on the optical axis, the positional offset of the spacer elements during assembly can be effectively controlled. This ensures that the light transmission of the optical system meets the requirements. At the same time, it can guarantee the variation in the lens field of view within a certain range, reduce the lens's optical sensitivity, and improve the lens's tolerance during assembly.

[0054] In an exemplary embodiment, the camera lens of this application can satisfy the condition 2.5 < (d0m / EPD) × (L / Td) < 5.0, where d0m is the inner diameter of the image-side end face of the lens barrel, EPD is the entrance pupil diameter of the camera lens, L is the maximum thickness of the lens barrel along the optical axis, and Td is the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens. By controlling the inner diameter of the image-side end face of the lens barrel, the entrance pupil diameter of the camera lens, the maximum thickness of the lens barrel along the optical axis, and the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens to satisfy the condition 2.5 < (d0m / EPD) × (L / Td) < 5.0, it can be ensured that the incident light transmission meets the requirements, that there is sufficient space for adjustment on the image-side end face of the lens barrel, that the forming and assembly of each lens component is stable during assembly, and that the lens structure is compact.

[0055] In an exemplary embodiment, the camera lens of this application can satisfy the condition 0.9 < (D0m - d0s) / f < 2.0, where D0m is the outer diameter of the image-side end face of the lens barrel, d0s is the inner diameter of the object-side end face of the lens barrel, and f is the effective focal length of the camera lens. By controlling the ratio of the difference between the outer diameter of the image-side end face of the lens barrel and the inner diameter of the object-side end face of the lens barrel to the effective focal length of the camera lens within this range, the molding and assembly appearance can be guaranteed, enabling the camera lens to meet the performance requirements of the optical system within a certain effective focal length, and ensuring the stability of the imaging system within the lens barrel.

[0056] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 9.0 < f / (EP12 + EP23 - T23) < 15, where f is the effective focal length of the camera lens, EP12 is the distance along the optical axis from the image side of the first spacer element to the object side of the second spacer element, EP23 is the distance along the optical axis from the image side of the second spacer element to the object side of the third spacer element, and T23 is the air gap between the second lens and the third lens on the optical axis. By controlling the effective focal length of the camera lens, the distance along the optical axis from the image side of the first spacer element to the object side of the second spacer element, the distance along the optical axis from the image side of the second spacer element to the object side of the third spacer element, and the air gap between the second lens and the third lens on the optical axis to satisfy the conditional formula 9.0 < f / (EP12 + EP23 - T23) < 15, while ensuring the light throughput, the lens aberration balance can be controlled, the stray light generated by the edge structure of the effective diameter of the camera lens can be avoided, and the imaging quality of the lens can be adjusted by adjusting the air gap, ensuring that the light can meet the requirements of the optical system during imaging.

[0057] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 10 < D3s / (CP3 + EP34 - CT4) < 45, where D3s is the outer diameter of the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element along the direction parallel to the optical axis, EP34 is the distance along the optical axis from the image side of the third spacer element to the object side of the fourth spacer element, and CT4 is the central thickness of the fourth lens on the optical axis. By controlling the outer diameter of the object side of the third spacer element, the maximum thickness of the third spacer element along the direction parallel to the optical axis, the distance along the optical axis from the image side of the third spacer element to the object side of the fourth spacer element, and the central thickness of the fourth lens on the optical axis to satisfy the conditional formula 10 < D3s / (CP3 + EP34 - CT4) < 45, the central thickness ratio of the lens can be ensured, thereby controlling its distortion within a reasonable range and ensuring a good imaging effect for the field of view on the optical axis of the system.

[0058] In an exemplary embodiment, among the inner diameters of the object sides of each spacer element from the first spacer element to the sixth spacer element, the inner diameter of the object side of the second spacer element is the smallest.

[0059] In an exemplary embodiment, the camera lens of the present application may include at least one aperture stop. The aperture stop can restrict the light path and control the light intensity. The aperture stop can be set at an appropriate position of the camera lens. For example, the aperture stop can be set between the object side and the first lens.

[0060] In an exemplary embodiment, optionally, the above camera lens may further include a filter for correcting chromatic aberration and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0061] The camera lens according to the above embodiments of this application may include a six-element imaging lens group, multiple spacers, and a lens barrel. The fifth and sixth lenses have positive and negative optical powers, respectively. The opening diameter of the object-side end face of the lens barrel is smaller than the opening diameter of its image-side end face. A fourth spacer is disposed on the image side of the fourth lens, contacting its image-side surface. Furthermore, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the inner diameter d0m of the image-side end face of the lens barrel, and the inner diameter d4s of the object-side surface of the fourth spacer satisfy the condition 0.5 < (f5 + f6) / (d0m - d4s) < 5.5. This helps control stray light generated at the edges of the fifth and sixth lenses or their adjacent spacers. Simultaneously, by increasing the light transmission through the inner diameter of the object-side surface of the fourth spacer, the relative illumination of the off-axis field of view can be improved. This facilitates the reduction of the lens head structure while ensuring illumination, enabling the matching of different lens sizes.

[0062] In embodiments of this application, the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens may have one or more aspherical mirror surfaces. Aspherical lenses have better radius of curvature characteristics and have the advantages of improving distortion aberrations and astigmatism aberrations. By using aspherical lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving image quality.

[0063] However, those skilled in the art will understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the camera lens and the number of spacers can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the camera lens is not limited to including six lenses. If desired, the camera lens may include other numbers of lenses. As another example, although the first to sixth spacers are described as an example in the embodiment, the camera lens is not limited to including the first to sixth spacers. If desired, the camera lens may include other numbers of spacers.

[0064] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the camera lens applicable to the above-described embodiments.

[0065] Example 1

[0066] The following is for reference Figures 2 to 9 The camera lens according to Embodiment 1 of this application is described. Figure 2 A schematic diagram of the lens group included in the camera lens according to Embodiment 1 of this application is shown, and Figure 3 , Figure 4 , Figure 5 The diagrams show the structure of the camera lens according to Embodiment 1 of this application in three different implementations.

[0067] Combination Figures 2 to 5 The camera lens includes a lens barrel P0 and six lenses arranged sequentially along the optical axis from the object side to the image side, which are mounted in the lens barrel P0: 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.

[0068] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex.

[0069] In this embodiment, the camera lens further includes a filter E7 located on the image side of the sixth lens E6, the filter E7 having an object-side surface S13 and an image-side surface S14. Additionally, the camera lens includes an imaging surface S15, on which light from the object can sequentially pass through surfaces S1 to S14 and ultimately be imaged.

[0070] Table 1 shows the basic parameters of the camera lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0071]

[0072]

[0073] Table 1

[0074] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0075]

[0076] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A14, A15, A16, A17, A18, A19 ... 10 A 12 A 14A 16 A 18 and A 20 .

[0077] Face number A4 A6 A8 A10 A12 S1 -2.0180E-03 2.7890E-02 -1.1869E-01 2.9927E-01 -4.5198E-01 S2 -5.1023E-02 3.1109E-02 -8.4325E-02 3.1091E-01 -7.1481E-01 S3 -2.9210E-02 5.6723E-02 7.3373E-01 -3.9379E+00 1.1722E+01 S4 -3.0835E-03 2.8218E-01 -8.4883E-01 4.1115E+00 -1.2484E+01 S5 -1.7708E-01 -3.5178E-02 1.6267E+00 -1.1089E+01 4.0814E+01 S6 -1.7823E-01 1.2970E-01 -4.8116E-01 1.6241E+00 -4.4512E+00 S7 -1.1339E-01 -2.9331E-01 1.6912E+00 -5.2038E+00 9.7592E+00 S8 -1.1746E-01 -8.7980E-02 5.5513E-01 -1.2111E+00 1.6289E+00 S9 -7.2892E-02 -1.0158E-01 1.1264E-01 -7.8286E-02 3.5207E-02 S10 1.0289E-03 -1.2137E-01 1.1044E-01 -6.3114E-02 2.3775E-02 S11 -6.8820E-02 4.0996E-02 -1.1078E-02 1.6374E-04 6.6049E-04 S12 -9.7471E-02 6.5546E-02 -2.2215E-02 3.7983E-03 -2.2991E-04

[0078] Table 2-1

[0079] Face number A14 A16 A18 A20 S1 3.7227E-01 -1.4261E-01 2.2864E-04 5.6602E-03 S2 8.4494E-01 -4.9001E-01 9.0917E-02 1.3569E-02 S3 -2.1599E+01 2.4154E+01 -1.4907E+01 3.8926E+00 S4 2.2465E+01 -2.1896E+01 9.5317E+00 -4.3345E-01 S5 -9.0412E+01 1.2016E+02 -8.8505E+01 2.7907E+01 S6 7.8009E+00 -8.1004E+00 4.4816E+00 -1.0114E+00 S7 -1.1292E+01 7.6707E+00 -2.6830E+00 3.0991E-01 S8 -1.3278E+00 6.3124E-01 -1.6122E-01 1.7122E-02 S9 -8.7135E-03 9.7339E-04 -9.5020E-06 -4.5107E-06 S10 -5.7665E-03 8.5410E-04 -6.9120E-05 2.3084E-06 S11 -1.7203E-04 2.0320E-05 -1.1991E-06 2.8718E-08 S12 -3.3144E-05 7.8256E-06 -6.1192E-07 1.7596E-08

[0080] Table 2-2

[0081] Figure 3 , Figure 4 and Figure 5 The diagrams show the structural schematics of the camera lens in three different embodiments: 1-1, 1-2, and 1-3. Figures 3 to 5 It can be seen that the camera lens may also include multiple spacer elements housed in the lens barrel P0.

[0082] Specifically, in embodiments 1-1 and 1-2, the plurality of spacer elements include: a first spacer element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second spacer element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third spacer element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth spacer element P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; a fifth spacer element P5 located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; and a sixth spacer element P6 located on the image side of the sixth lens E6 and in contact with the image side of the sixth lens E6.

[0083] In embodiments 1-3, the plurality of spacers include: a first spacer P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second spacer P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third spacer P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth spacer P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; and a sixth spacer P6 located on the image side of the sixth lens E6 and in contact with the image side of the sixth lens E6.

[0084] The relevant parameter values ​​in Examples 1-1, 1-2, and 1-3 are shown in Table 9, respectively. Figures 3 to 5 as well as Figure 1Wherein, d2s is the inner diameter of the object-side surface of the second spacer P2; D2m is the outer diameter of the image-side surface of the second spacer P2; D3s is the outer diameter of the object-side surface of the third spacer P3; d4s is the inner diameter of the object-side surface of the fourth spacer P4; D4s is the outer diameter of the object-side surface of the fourth spacer P4; D6 is the maximum outer diameter of the sixth spacer P6; d0s is the inner diameter of the object-side end face of the lens barrel P0; d0m is the inner diameter of the image-side end face of the lens barrel P0; D0m is the outer diameter of the image-side end face of the lens barrel P0; EP12 is the distance along the optical axis from the image-side surface of the first spacer P1 to the object-side surface of the second spacer P2. EP23 is the distance along the optical axis from the image-side surface of the second spacer P2 to the object-side surface of the third spacer P3; CP3 is the maximum thickness of the third spacer P3 along the direction parallel to the optical axis; EP34 is the distance along the optical axis from the image-side surface of the third spacer P3 to the object-side surface of the fourth spacer P4; EP46 is the distance along the optical axis from the image-side surface of the fourth spacer P4 to the object-side surface of the sixth spacer P6; and L is the maximum thickness of the lens barrel P0 along the optical axis, that is, the distance along the optical axis from the object-side end face (the end face closest to the object side) of the lens barrel P0 to the image-side end face (the end face closest to the image side) of the lens barrel P0. All parameters shown in Table 9 are in millimeters (mm).

[0085] Figure 6 The on-axis chromatic aberration curve of the camera lens of Embodiment 1 is shown, which represents the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 7 The astigmatism curve of the camera lens of Embodiment 1 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 8 The distortion curve of the camera lens in Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 9 The magnification chromatic aberration curve of the camera lens of Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 6 to 9 It can be seen that the camera lens given in Example 1 can achieve good imaging quality.

[0086] Example 2

[0087] The following is for reference Figures 10 to 17 A camera lens according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 10 A schematic diagram of the lens group included in the camera lens according to Embodiment 2 of this application is shown, and Figure 11 , Figure 12 , Figure 13 The diagrams show the structure of the camera lens according to Embodiment 2 of this application in three different implementations.

[0088] Combination Figures 10 to 13 The camera lens includes a lens barrel P0 and six lenses arranged sequentially along the optical axis from the object side to the image side, which are mounted in the lens barrel P0: 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.

[0089] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave.

[0090] In this embodiment, the camera lens also includes an imaging surface S13 located on the image side of the sixth lens E6, where light from the object can pass sequentially through each surface S1 to S12 and finally be imaged on the imaging surface S13.

[0091] Table 3 shows the basic parameters of the camera lens in Example 2, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 4-1 and 4-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S12 in Example 2. 10 A 12 A 14 A 16 A 18 and A 20 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0092]

[0093] Table 3

[0094] Face number A4 A6 A8 A10 A12 S1 -1.1404E-02 -8.3971E-02 7.0528E-01 -4.9061E+00 2.0551E+01 S2 -1.9290E-01 1.1415E+00 -2.8315E+00 1.0000E+00 1.8667E+01 S3 -2.6675E-01 2.1219E+00 -5.4296E+00 -3.0990E+00 7.6892E+01 S4 -1.1968E-01 1.3441E+00 -5.8432E+00 2.0162E+01 -6.4897E+01 S5 -4.0895E-02 -7.9121E-02 3.5247E+00 -3.3386E+01 1.7435E+02 S6 -3.8241E-01 1.2066E+00 -6.7543E+00 3.2319E+01 -1.1304E+02 S7 -5.3858E-01 1.3445E+00 -8.9989E+00 4.8737E+01 -1.8278E+02 S8 -1.9767E-01 1.9142E-01 -1.2078E+00 5.2071E+00 -1.3928E+01 S9 1.4617E-03 7.5620E-02 -7.4028E-01 3.4241E+00 -8.5197E+00 S10 2.2176E-02 -1.8330E-02 5.7198E-02 1.5074E-02 2.6310E-02 S11 2.0434E-01 -3.9631E-01 4.4969E-01 -3.2107E-01 1.4823E-01 S12 1.2889E-01 -2.5813E-01 2.3419E-01 -1.3091E-01 4.7024E-02

[0095] Table 4-1

[0096]

[0097]

[0098] Table 4-2

[0099] Figure 11 , Figure 12 and Figure 13 The diagrams show the structural schematics of the camera lens in three different embodiments, namely, Examples 2-1, 2-2, and 2-3. Figures 11 to 13 It can be seen that the camera lens may also include multiple spacer elements housed in the lens barrel P0.

[0100] Specifically, in embodiments 2-1, 2-2, and 2-3, the plurality of spacer elements include: a first spacer element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second spacer element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third spacer element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth spacer element P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; a fifth spacer element P5 located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; and a sixth spacer element P6 located on the image side of the sixth lens E6 and in contact with the image side of the sixth lens E6.

[0101] The relevant parameter values ​​in Examples 2-1, 2-2 and 2-3 are shown in Table 9. The meaning of each parameter is as described above and will not be repeated here. The unit of each parameter in Table 9 is millimeters (mm).

[0102] Figure 14 The on-axis chromatic aberration curve of the camera lens of Embodiment 2 is shown, which represents the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 15 The astigmatism curve of the camera lens of Embodiment 2 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 16 The distortion curve of the camera lens in Example 2 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 17 The magnification chromatic aberration curve of the camera lens in Embodiment 2 is shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 14 to 17 It can be seen that the camera lens given in Example 2 can achieve good imaging quality.

[0103] Example 3

[0104] The following is for reference Figures 18 to 25 A camera lens according to Embodiment 3 of this application is described. Figure 18 A schematic diagram of the lens group included in the camera lens according to Embodiment 3 of this application is shown, and Figure 19 , Figure 20 , Figure 21 Schematic diagrams of the camera lens according to Embodiment 3 of this application are shown in three different implementations.

[0105] Combination Figures 18 to 21The camera lens includes a lens barrel P0 and six lenses arranged sequentially along the optical axis from the object side to the image side, which are mounted in the lens barrel P0: 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.

[0106] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave.

[0107] In this embodiment, the camera lens further includes a filter E7 located on the image side of the sixth lens E6, the filter E7 having an object-side surface S13 and an image-side surface S14. Additionally, the camera lens includes an imaging surface S15, on which light from the object can sequentially pass through surfaces S1 to S14 and ultimately be imaged.

[0108] Table 5 shows the basic parameters of the camera lens in Example 3, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 6-1 and 6-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S12 in Example 3. 10 A 12 A 14 A 16 A 18 and A 20 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0109]

[0110] Table 5

[0111] Face number A4 A6 A8 A10 A12 S1 1.5007E-03 1.3884E-02 -1.2794E-01 5.9915E-01 -1.6371E+00 S2 -4.1546E-02 8.4231E-02 -6.4838E-01 3.0355E+00 -8.7291E+00 S3 -3.9923E-03 6.4190E-02 4.5743E-01 -2.9355E+00 9.9742E+00 S4 -2.1013E-02 4.8316E-01 -2.6605E+00 1.3907E+01 -4.8106E+01 S5 -1.7821E-01 3.0020E-01 -1.3462E+00 4.1648E+00 -9.8850E+00 S6 -1.7974E-01 3.9437E-01 -2.0880E+00 8.2117E+00 -2.2657E+01 S7 -1.8954E-01 8.4694E-02 6.4581E-01 -3.3352E+00 8.9834E+00 S8 -1.7666E-01 1.1677E-01 6.4821E-02 -3.2024E-01 5.7847E-01 S9 -9.4319E-02 -3.2186E-02 1.3627E-02 1.2095E-02 -2.6658E-02 S10 -1.3508E-02 -5.2810E-02 3.4111E-02 -1.4113E-02 3.4383E-03 S11 -6.1051E-02 4.0456E-02 -1.6401E-02 4.1212E-03 -6.4709E-04 S12 -5.0821E-02 1.7595E-02 -2.6890E-03 -1.0080E-04 1.0441E-04

[0112] Table 6-1

[0113]

[0114]

[0115] Table 6-2

[0116] Figure 19 , Figure 20 and Figure 21The diagrams show the structural schematics of the camera lens in three different embodiments, namely, 3-1, 3-2, and 3-3, in conjunction with... Figures 19 to 21 It can be seen that the camera lens may also include multiple spacer elements housed in the lens barrel P0.

[0117] Specifically, in embodiments 3-1, 3-2, and 3-3, the plurality of spacer elements include: a first spacer element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second spacer element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third spacer element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth spacer element P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; a fifth spacer element P5 located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; and a sixth spacer element P6 located on the image side of the sixth lens E6 and in contact with the image side of the sixth lens E6.

[0118] The relevant parameter values ​​in Examples 3-1, 3-2 and 3-3 are shown in Table 9. The meaning of each parameter is as described above and will not be repeated here. The unit of each parameter in Table 9 is millimeters (mm).

[0119] Figure 22 The on-axis chromatic aberration curve of the camera lens of Embodiment 3 is shown, which represents the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 23 The astigmatism curve of the camera lens of Embodiment 3 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 24 The distortion curve of the camera lens in Example 3 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 25 The magnification chromatic aberration curve of the camera lens in Embodiment 3 is shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 22 to 25 It can be seen that the camera lens given in Example 3 can achieve good imaging quality.

[0120] Example 4

[0121] The following is for reference Figures 26 to 33 A camera lens according to Embodiment 4 of this application is described. Figure 26 A schematic diagram of the lens group included in the camera lens according to Embodiment 4 of this application is shown, and Figure 27 , Figure 28 , Figure 29 Schematic diagrams of the camera lens according to Embodiment 4 of this application are shown in three different implementations.

[0122] Combination Figures 26 to 29 The camera lens includes a lens barrel P0 and six lenses arranged sequentially along the optical axis from the object side to the image side, which are mounted in the lens barrel P0: 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.

[0123] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex.

[0124] In this embodiment, the camera lens further includes a filter E7 located on the image side of the sixth lens E6, the filter E7 having an object-side surface S13 and an image-side surface S14. Additionally, the camera lens includes an imaging surface S15, on which light from the object can sequentially pass through surfaces S1 to S14 and ultimately be imaged.

[0125] Table 7 shows the basic parameters of the camera lens in Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 8-1 and 8-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S12 in Example 4. 10 A 12 A 14 A 16 A 18 and A 20 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0126]

[0127] Table 7

[0128] Face number A4 A6 A8 A10 A12 S1 1.7455E-03 -2.9099E-03 1.6142E-02 -3.8344E-02 4.5316E-02 S2 -5.0755E-02 2.4493E-02 -1.0701E-02 6.7689E-02 -1.3484E-01 S3 -3.3268E-02 6.7629E-02 3.8069E-01 -1.7930E+00 4.6240E+00 S4 -8.8165E-03 2.6018E-01 -9.1785E-01 4.3396E+00 -1.2958E+01 S5 -1.4974E-01 -5.7913E-02 1.5120E+00 -9.2312E+00 3.0978E+01 S6 -1.4504E-01 1.1168E-01 -3.0566E-01 7.8851E-01 -1.8500E+00 S7 -9.2141E-02 -1.3683E-01 9.4239E-01 -2.9088E+00 5.3768E+00 S8 -1.1241E-01 -3.6615E-03 2.2632E-01 -4.9767E-01 6.2658E-01 S9 -7.3363E-02 -3.9678E-02 4.4971E-02 -3.5771E-02 1.8228E-02 S10 -1.6423E-02 -4.6845E-02 3.4636E-02 -1.5774E-02 4.4486E-03 S11 -4.5264E-02 2.2277E-02 -5.9727E-03 6.7781E-04 3.4406E-05 S12 -5.4196E-02 2.6973E-02 -8.9893E-03 2.1013E-03 -3.5662E-04

[0129] Table 8-1

[0130]

[0131]

[0132] Table 8-2

[0133] Figure 27 , Figure 28 and Figure 29 The diagrams show the structural schematics of the camera lens in three different embodiments, namely 4-1, 4-2, and 4-3, respectively. Figures 27 to 29 It can be seen that the camera lens may also include multiple spacer elements housed in the lens barrel P0.

[0134] Specifically, in embodiments 4-1 and 4-2, the plurality of spacer elements include: a first spacer element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second spacer element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third spacer element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth spacer element P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; a fifth spacer element P5 located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; and a sixth spacer element P6 located on the image side of the sixth lens E6 and in contact with the image side of the sixth lens E6.

[0135] In embodiments 4-3, the plurality of spacers include: a first spacer P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second spacer P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third spacer P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth spacer P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; and a sixth spacer P6 located on the image side of the sixth lens E6 and in contact with the image side of the sixth lens E6.

[0136] The relevant parameter values ​​in Examples 4-1, 4-2 and 4-3 are shown in Table 9. The meaning of each parameter is as described above and will not be repeated here. The unit of each parameter in Table 9 is millimeters (mm).

[0137] Figure 30 The on-axis chromatic aberration curve of the camera lens of Embodiment 4 is shown, which represents the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 31 The astigmatism curve of the camera lens of Embodiment 4 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 32 The distortion curve of the camera lens in Example 4 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 33 The magnification chromatic aberration curve of the camera lens in Embodiment 4 is shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 30 to 33It can be seen that the camera lens given in Example 4 can achieve good imaging quality.

[0138]

[0139]

[0140] Table 9

[0141] Furthermore, in Examples 1 to 4, the effective focal length values ​​f1 to f6 of each lens, the effective focal length f of the camera lens, and the maximum field of view (FOV) of the camera lens are shown in Table 10.

[0142] Parameters / Examples 1 2 3 4 f1(mm) 3.05 2.42 3.12 3.25 f2 (mm) -8.60 -3.29 -7.92 -8.85 f3 (mm) -57.92 5.78 20555.33 -86.71 f4 (mm) 44.07 -35.17 -95.04 31.71 f5 (mm) 23.15 6.52 13.55 27.03 f6 (mm) -2.50 -3.34 -3.76 -3.37 f(mm) 4.58 3.45 4.58 4.58 FOV (°) 81.4 84.8 81.6 83.0

[0143] Table 10

[0144] Examples 1 to 4 satisfy the conditions shown in Tables 11-1 and 11-2, respectively.

[0145]

[0146] Table 11-1

[0147]

[0148]

[0149] Table 11-2

[0150] This application also provides an imaging device equipped with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device. The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the camera lens described above.

[0151] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of protection involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A camera lens, comprising a lens barrel and a lens group and a plurality of spacer elements housed within the lens barrel, characterized in that, The lens group comprises lenses arranged sequentially along the optical axis from the object side to the image side: The first lens with positive optical power has a convex object side and a concave image side. A second lens with negative optical power has a concave image-side surface; A third lens with optical power has a convex object side. The fourth lens with optical power has a concave object side and a convex image side. A fifth lens with positive optical power has an object-side surface that is convex and an image-side surface that is concave; or, an object-side surface that is concave and an image-side surface that is convex; and The sixth lens has negative optical power and its object side is concave. The third lens and the fourth lens have opposite positive and negative optical power properties; The camera lens has six lenses with optical power. The opening diameter of the object-side end face of the lens tube is smaller than the opening diameter of its image-side end face. The plurality of spacers include: a fourth spacer located on the image side of the fourth lens and in contact with the image side of the fourth lens; and a sixth spacer located on the image side of the sixth lens and in contact with the image side of the sixth lens. The camera lens satisfies: 0.69≤(f5+f6) / (d0m-d4s)≤5.11, 6.01≤(D4s-d4s) / (T45×(N4-1))≤9.30 and 3.74≤(D6-d4s) / (T56×(N5-1))≤8.86; Wherein, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, d0m is the inner diameter of the image-side end face of the lens barrel, d4s is the inner diameter of the object-side face of the fourth spacer element, D4s is the outer diameter of the object-side face of the fourth spacer element, T45 is the air gap between the fourth and fifth lenses on the optical axis, N4 is the refractive index of the fourth lens, D6 is the maximum outer diameter of the sixth spacer element, T56 is the air gap between the fifth and sixth lenses on the optical axis, and N5 is the refractive index of the fifth lens.

2. The camera lens according to claim 1, characterized in that, The plurality of spacers further includes: a second spacer, located on the image side of the second lens and in contact with the image side of the second lens; The effective focal length f2 of the second lens, the outer diameter D2m of the image side of the second spacer element, and the inner diameter d2s of the object side of the second spacer element satisfy the following: -7.5≤f2 / (D2m-d2s)≤-1.

5.

3. The camera lens according to claim 1, characterized in that, The effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the distance EP46 from the image side of the fourth spacer to the object side of the sixth spacer along the optical axis satisfy the following: 7.98≤(f5-f6) / EP46≤31.

10.

4. The camera lens according to claim 1, characterized in that, The maximum outer diameter D6 of the sixth spacer element satisfies: 1.66≤f5 / (D6-d4s)≤6.

78.

5. The camera lens according to claim 1, characterized in that, In the first to the fifth lenses, the object-side surface of the i-th lens is concave, and the radius of curvature R of the object-side surface of the i-th lens is... (2i-1) The radius of curvature R of the image-side surface of the i-th lens 2i The inner diameter dis of the object side of the i-th spacer element, located on the image side of the i-th lens and in contact with the image side of the i-th lens, satisfies: -36.88≤(R (2i-1) +R 2i ) / dis≤-1.21, where i is taken from 2, 4, 5.

6. The camera lens according to claim 1, characterized in that, In the first to the fourth lenses, the air gap between any two adjacent lenses on the optical axis is less than 0.3 mm. Furthermore, the j-th spacer element is located on the image side of the j-th lens and contacts the image side surface of the j-th lens, and the (j+1)-th spacer element is located on the image side of the (j+1)-th lens and contacts the image side surface of the (j+1)-th lens. The distance EP from the image side of the j-th spacer element to the object side of the (j+1)-th spacer element along the optical axis j(j+1) The air gap T between the j-th lens and the (j+1)-th lens on the optical axis j(j+1) The center thickness CT of the (j+1)th lens on the optical axis (j+1) satisfy: 0.3 <EP j(j+1) / (T j(j+1) +CT (j+1) )<1.5, where j is taken from 1, 2, 3.

7. The camera lens according to any one of claims 1 to 6, characterized in that, The maximum thickness L of the lens barrel along the optical axis, the entrance pupil diameter EPD of the camera lens, and the distance Td from the object side of the first lens to the image side of the sixth lens along the optical axis satisfy the following: 2.64≤(d0m / EPD)×(L / Td)≤4.

32.

8. The camera lens according to any one of claims 1 to 6, characterized in that, The outer diameter D0m of the image-side end face of the lens barrel, the inner diameter d0s of the object-side end face of the lens barrel, and the effective focal length f of the camera lens satisfy the following: 0.9 < (D0m - d0s) / f ≤ 1.

83.

9. The camera lens according to claim 2, characterized in that, The plurality of spacers further includes: a first spacer located on the image side of the first lens and in contact with the image side of the first lens; and a third spacer located on the image side of the third lens and in contact with the image side of the third lens. The effective focal length f of the camera lens, the distance EP12 from the image side of the first spacer element to the object side of the second spacer element along the optical axis, the distance EP23 from the image side of the second spacer element to the object side of the third spacer element along the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis satisfy the following: 9.12≤f / (EP12+EP23-T23)≤14.

00.

10. The camera lens according to claim 9, characterized in that, The outer diameter D3s of the object side of the third spacer, the maximum thickness CP3 of the third spacer along the direction parallel to the optical axis, the distance EP34 from the image side of the third spacer to the object side of the fourth spacer along the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy the following: 13.14≤D3s / (CP3+EP34-CT4)≤42.

26.

11. The camera lens according to claim 9, characterized in that, The plurality of spacers further includes: a fifth spacer, located on the image side of the fifth lens and in contact with the image side of the fifth lens; Among the inner diameters of the object side surfaces of each of the spacers from the first to the sixth spacer, the inner diameter of the object side surface of the second spacer is the smallest.

Images