Optical imaging lens

Abstract

The present application discloses an optical imaging lens comprising an optical lens group, a spacer group and a lens barrel; the optical lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are arranged in sequence from the object side to the image side along the optical axis; the spacer group comprises a fifth spacer and a sixth spacer, the fifth spacer is arranged between the fifth lens and the sixth lens and is in at least partial contact with the fifth lens; the sixth spacer is arranged between the sixth lens and the seventh lens and is in at least partial contact with the sixth lens; the optical lens group is arranged in the lens barrel; the maximum thickness CP6 of the sixth spacer along the optical axis direction is greater than the center thickness CT6 of the sixth lens on the optical axis; the inner diameter d5s of the object side surface of the fifth spacer and the inner diameter d6s of the object side surface of the sixth spacer, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis satisfies: 4.5<(d6s-d5s) / T56<8.0.

Description

Technical Field

[0001] The present application relates to the field of optical devices, and in particular to an optical imaging lens. Background Art

[0002] With the rapid development of diversified camera functions in portable devices such as smartphones, the requirements for optical lenses configured in portable devices such as smartphones are getting higher and higher to meet different camera needs, and the number of lenses in optical imaging lenses is increasing. For example, some mobile phone models are equipped with optical imaging lenses for shooting multiple scenes such as main camera, telephoto, wide angle and macro. As the number of lenses in optical imaging lenses increases, the imaging specifications of optical imaging lenses are also gradually becoming stricter, especially the shooting quality of the main optical imaging lens needs to meet various shooting scenes, and the assessment of stray light and ghost images is more stringent.

[0003] The more lenses a main camera with a large image plane has, the greater the probability of stray light and ghost images, which greatly increases the difficulty of design. At the same time, for locations with large step differences or large intervals inside the lens group, the risk of stray light reflected by the inner diameter surface of the spacer increases, affecting the overall shooting quality of the optical imaging lens. Summary of the invention

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

[0005] The present application provides an optical imaging lens, comprising an optical lens group, a spacer group and a lens barrel, wherein the optical lens group comprises, in order from the object side to the image side along the optical axis, a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with positive optical power and a seventh lens with negative optical power; the spacer group comprises a fifth spacer and a sixth spacer, wherein the fifth spacer is disposed between the fifth lens and the sixth lens and is in at least partial contact with the fifth lens; the sixth spacer is disposed between the sixth lens and the seventh lens and is in at least partial contact with the sixth lens; the lens barrel accommodates the optical lens group and the spacer group; wherein the maximum thickness CP6 of the sixth spacer along the optical axis is greater than the center thickness CT6 of the sixth lens on the optical axis; the inner diameter d5s of the object side surface of the fifth spacer and the inner diameter d6s of the object side surface of the sixth spacer, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis satisfies: 4.5<(d6s-d5s) / T56<8.0.

[0006] According to an exemplary embodiment of the present application, there is a spacing distance between adjacent lenses.

[0007] According to an exemplary embodiment of the present application, the spacer group further includes a fourth spacer, which is disposed between the fourth lens and the fifth lens and at least partially in contact with the fourth lens; wherein an inner diameter d4s of the object side surface of the fourth spacer and a maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 2.0 <d4s / DT42<2.8。

[0008] According to an exemplary embodiment of the present application, the spacer group further includes a fourth spacer, which is disposed between the fourth lens and the fifth lens and at least partially in contact with the fourth lens; wherein a spacing distance EP45 between the image side surface of the fourth spacer and the object side surface of the fifth spacer along the optical axis, an outer diameter D5s of the object side surface of the fifth spacer, and an outer diameter D4m of the image side surface of the fourth spacer satisfy: 0.1 <EP45 / (D5s-D4m)<0.6。

[0009] According to an exemplary embodiment of the present application, the spacer group further includes a second spacer and a third spacer, the second spacer is disposed between the second lens and the third lens and is in at least partial contact with the second lens, and the third spacer is disposed between the third lens and the fourth lens and is in at least partial contact with the third lens; wherein the spacing distance EP23 between the image side surface of the second spacer and the object side surface of the third spacer along the optical axis direction and the center thickness CT3 of the third lens on the optical axis satisfy: 1.0 <EP23 / CT3<2.0。

[0010] According to an exemplary embodiment of the present application, the spacer group also includes a first spacer, which is placed between the first lens and the second lens and at least partially contacts the first lens; the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, and the inner diameter d1s of the object side surface of the first spacer satisfy: 3.0<(R1+R2) / d1s<4.5.

[0011] According to an exemplary embodiment of the present application, the spacer group further includes a first spacer, which is disposed between the first lens and the second lens and at least partially contacts the first lens; wherein a spacing distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer along the optical axis and an axial distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens satisfy: 1.2 <EP01 / |SAG11|<2.0。

[0012] According to an exemplary embodiment of the present application, the spacer group further includes a fourth spacer, which is disposed between the fourth lens and the fifth lens and at least partially contacts the fourth lens; a spacing distance EP45 between the image side surface of the fourth spacer and the object side surface of the fifth spacer along the optical axis and an axial distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the effective radius vertex of the object side surface of the fifth lens satisfy: 0.5 <EP45 / |SAG51|<1.3。

[0013] According to an exemplary embodiment of the present application, the spacer group also includes a fourth spacer, which is placed between the fourth lens and the fifth lens and is at least partially in contact with the fourth lens; wherein an outer diameter D4s of the object side of the fourth spacer, a maximum effective radius DT32 of the image side of the third lens, and a maximum thickness CP4 of the fourth spacer along the optical axis direction satisfy: 11<(D4s-DT32) / CP4<20.5.

[0014] According to an exemplary embodiment of the present application, the inner diameter d6m of the image side surface of the sixth spacer, the curvature radius R12 of the image side surface of the sixth lens, the effective focal length f6 of the sixth lens, and the maximum thickness CP6 of the sixth spacer along the optical axis direction satisfy: 31 <d6m / R12*(f6 / CP6)<66。

[0015] According to an exemplary embodiment of the present application, the maximum thickness CP6 of the sixth spacer along the optical axis, the spacing distance T67 between the sixth lens and the seventh lens on the optical axis, the on-axis distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh lens, and the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens satisfy: 1.0≤(T67-CP6) / (|SAG71|-|SAG62|)<1.6.

[0016] According to an exemplary embodiment of the present application, an inner diameter d5m of the image side surface of the fifth spacer, an inner diameter d5s of the object side surface of the fifth spacer, and a curvature radius R11 of the object side surface of the sixth lens satisfy: 0.15<(d5m-d5s) / R11<0.6.

[0017] According to an exemplary embodiment of the present application, the inner diameter d5s of the object side surface of the fifth spacer and the curvature radius R11 of the object side surface of the sixth lens satisfy: 2.0 <d5s / R11<3.2。

[0018] According to an exemplary embodiment of the present application, the maximum thickness CP6 of the sixth spacer along the optical axis direction, the spacing distance T67 between the sixth lens and the seventh lens on the optical axis satisfies: 0.4 <CP6 / T67<0.7。

[0019] According to an exemplary embodiment of the present application, the combined focal length f56 of the fifth lens and the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, the center thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer along the optical axis direction satisfy: 1.3 <f56 / R12*(CP5 / CT5)<3.8。

[0020] According to an exemplary embodiment of the present application, an inner diameter d0s of the object-side surface of the lens barrel, an inner diameter d0m of the image-side surface of the lens barrel, and an effective focal length f7 of the seventh lens satisfy: -1.5<(d0m-d0s) / f7<-1.2.

[0021] The optical imaging lens provided in the present application includes an optical lens group, a spacer group and a lens barrel. The optical lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side along the optical axis. The spacer group includes a fifth spacer and a sixth spacer. The fifth spacer may be placed between the image side surface of the fifth lens and the sixth lens and at least partially contact the image side surface of the fifth lens. The sixth spacer may be placed between the image side surface of the sixth lens and the seventh lens and at least partially contact the image side surface of the sixth lens. The maximum thickness CP6 of the sixth spacer along the optical axis is greater than the center thickness CT6 of the sixth lens on the optical axis, thereby effectively enhancing the strength of the sixth lens and preventing the optical imaging lens from generating assembly deformation and other problems during the assembly process. However, such a setting will also cause the edge field light of the sixth lens to be too high, thereby causing poor stray light. Therefore, by controlling the inner diameter d5s of the object side surface of the fifth spacer and the inner diameter d6s of the object side surface of the sixth spacer, the spacing distance T56 between the fifth lens and the sixth lens on the optical axis satisfies: 4.5<(d6s-d5s) / T56<8.0, which can effectively improve the stray light deflected from the sixth lens to the fifth spacer and / or the sixth spacer, and improve the imaging quality of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings, in which:

[0023] Figure 1A A parameter annotation diagram of an optical imaging lens according to the present application is shown;

[0024] Figure 1B A stray light trend diagram of a sixth lens of the optical imaging lens system according to the present application at a position away from the optical axis is shown;

[0025] Figure 2A The total stray light spot diagram when the optical imaging lens satisfies (d6s-d5s) / T56=2.88 is shown;

[0026] Figure 2B The relevant optical path diagram of the maximum energy spot when the optical imaging lens satisfies (d6s-d5s) / T56=2.88 is shown;

[0027] Figure 2C The relevant optical path diagram of the sub-energy spot when the optical imaging lens satisfies (d6s-d5s) / T56=2.88 is shown;

[0028] Figure 2D The total stray light spot diagram when the optical imaging lens satisfies (d6s-d5s) / T56=8.31 ​​is shown;

[0029] Figure 2E The relevant optical path diagram of the maximum energy spot when the optical imaging lens satisfies (d6s-d5s) / T56=8.31 ​​is shown;

[0030] Figure 2F The relevant optical path diagram of the sub-energy spot when the optical imaging lens satisfies (d6s-d5s) / T56=8.31 ​​is shown;

[0031] Figure 2G The total stray light spot diagram when the optical imaging lens satisfies (d6s-d5s) / T56=6.72 is shown;

[0032] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0033] Figure 4 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0034] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0035] FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Embodiment 1, 2 or 3 of the present application are respectively shown;

[0036] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0037] Figure 8 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0038] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0039] FIG. 10A to FIG. 10DThe axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4, 5 or 6 of the present application are respectively shown;

[0040] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application is shown;

[0041] Fig.12 A schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application is shown;

[0042] Fig.13 A schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application is shown;

[0043] FIG. 14A to FIG. 14D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 7, 8 or 9 of the present application are respectively shown. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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 image plane is called the image side of the lens.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] refer to Figure 1A , Figure 1B , Figure 3-Figure 5 , Figure 7-Figure 9 as well as Figures 11 to 13 In a first aspect of the present application, an optical imaging lens is provided. The optical imaging lens may include an optical lens group. The optical lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence from the object side to the image side along the optical axis. The first lens to the seventh lens are arranged in sequence from the object side to the imaging surface side along the optical axis, and each lens has at least an object side surface facing the object side and an image side surface facing the imaging surface side.

[0052] There may be a spacing distance between any two adjacent lenses among the first to seventh lenses. For example, there may be an air space between any two adjacent lenses.

[0053] The number of lenses with optical power in the optical imaging lens is seven. In an exemplary embodiment, the first lens, the fourth lens, the fifth lens and the sixth lens have positive optical power; the second lens, the third lens and the seventh lens have negative optical power.

[0054] In an exemplary embodiment, the optical imaging lens may further include a spacer group. The spacer group includes one or more of a first spacer, a second spacer, a third spacer, a fourth spacer, a fifth spacer, and a sixth spacer. The first spacer may be placed between the image side surface of the first lens and the second lens and at least partially contact the image side surface of the second lens. The second spacer may be placed between the image side surface of the second lens and the third lens and at least partially contact the image side surface of the second lens. The third spacer may be placed between the image side surface of the third lens and the fourth lens and at least partially contact the image side surface of the third lens. The fourth spacer may be placed between the image side surface of the fourth lens and the fifth lens and at least partially contact the image side surface of the fourth lens. The fifth spacer may be placed between the image side surface of the fifth lens and the sixth lens and at least partially contact the image side surface of the fifth lens. The sixth spacer may be placed between the image side surface of the sixth lens and the seventh lens and at least partially contact the image side surface of the sixth lens. 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 optical imaging lens; while also ensuring the bearing stability of the lens.

[0055] In an exemplary embodiment, the optical imaging lens may further include a lens barrel for accommodating the optical lens group and the spacer group. The lens barrel includes an object side end surface, an image side end surface, an outer annular surface and an inner annular surface, and the inner annular surface is stepped.

[0056] In an exemplary embodiment, the maximum thickness CP6 of the sixth spacer along the optical axis is greater than the center thickness CT6 of the sixth lens on the optical axis, which can effectively enhance the strength of the sixth lens and prevent the optical imaging lens from generating assembly deformation and other problems during the assembly process. However, it will also cause the edge field light of the sixth lens to be too high, thereby causing poor stray light. Therefore, the inner diameter d5s of the object side of the fifth spacer and the inner diameter d6s of the object side of the sixth spacer are controlled, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis satisfies: 4.5<(d6s-d5s) / T56<8.0, which can effectively improve the stray light deflected from the sixth lens to the fifth spacer and / or the sixth spacer, and improve the imaging quality of the optical imaging lens. Reference Figure 1B In the stray light trend diagram of the sixth lens away from the optical axis, it satisfies: 4.5<(d6s-d5s) / T56<8.0, and the stray light is blocked at the position of the fifth spacer. The dotted line in the figure indicates the blocked stray light, which improves the stray light deflected by the sixth lens to the fifth spacer, thereby improving the imaging quality of the optical imaging lens.

[0057] The following combination Figures 2A to 2G Further explanation.

[0058] When (d6s-d5s) / T56<4.5 (e.g. (d6s-d5s) / T56=2.88), refer to FIG. 2A to FIG. 2C As shown, Figure 2A Total stray light spot diagram Figure 2B Optical path diagram related to the spot with the maximum energy Figure 2C Optical path diagram related to the spot with the secondary energy. From Figure 2B It can be seen that the maximum stray light energy intensity is approximately 0.000001772 lm / mm 2 , and the total energy intensity is approximately 0.000000448 lm; From Figure 2C It can be seen that the maximum stray light energy intensity is approximately 0.000002342 lm / mm 2 , and the total energy intensity is approximately 0.000000213 lm

[0059] When (d6s - d5s) / T56 > 8 (for example, (d6s - d5s) / T56 = 8.31), refer to FIG. 2D to FIG. 2F as shown Figure 2D Total stray light spot diagram Figure 2E Optical path diagram related to the spot with the maximum energy Figure 2F Optical path diagram related to the spot with the secondary energy. From Figure 2E It can be seen that the maximum stray light energy intensity is approximately 0.000009782 lm / mm 2 , and the total energy intensity is approximately 0.000000778 lm; From Figure 2F It can be seen that the maximum stray light energy intensity is approximately 0.000001231 lm / mm 2 , and the total energy intensity is approximately 0.000000133 lm

[0060] When 4.5 < (d6s - d5s) / T56 < 8.0 (for example, (d6s - d5s) / T56 = 6.72), refer to Figure 2G as shown Figure 2G Total stray light spot diagram. From Figure 2G it can be seen that the spots in the related optical path disappear, effectively reducing stray light and improving the imaging quality of the optical imaging lens

[0061] In an exemplary embodiment, when the spacer group includes a fourth spacer, the inner diameter d4s of the object side surface of the fourth spacer and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 2.0 < d4s / DT42 < 2.8. The inner diameter d4s of the object side surface of the fourth spacer can be understood as the inner diameter of the plane perpendicular to the optical axis of the object side surface of the fourth spacer. By controlling the ratio between the inner diameter of the object side surface of the fourth spacer and the maximum effective radius of the image side surface of the fourth lens within a reasonable range, the height of the light passing through the fourth lens can be effectively controlled. On the basis of ensuring the performance requirements of the optical system, the stray light deflected from the fourth lens to the fourth spacer can be avoided, and the imaging quality of the optical imaging lens can be improved

[0062] In an exemplary embodiment, when the spacer group includes a fourth spacer and a fifth spacer, the spacing distance EP45 between the image side surface of the fourth spacer and the object side surface of the fifth spacer in the optical axis direction, the outer diameter D5s of the object side surface of the fifth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy: 0.1 < EP45 / (D5s - D4m) < 0.6. The outer diameter of the object side surface of the fifth spacer can be understood as the outer diameter of the plane perpendicular to the optical axis of the object side surface of the fifth spacer, and the outer diameter of the image side surface of the fourth spacer can be understood as the outer diameter of the plane perpendicular to the optical axis of the image side surface of the fourth spacer. By controlling this condition, the difference between the outer diameter of the object side surface of the fifth spacer and the outer diameter of the image side surface of the fourth spacer can be effectively controlled within a reasonable range, ensuring that there is sufficient common bearing between the fifth spacer and the fourth spacer, while having the function of the fifth spacer and the lens barrel for auxiliary bearing, thereby improving the large step structure between the fifth lens and the sixth lens, improving the assembly stability, and enhancing the yield.

[0063] In an exemplary embodiment, when the spacer group includes a second spacer and a third spacer, the spacing distance EP23 between the image side surface of the second spacer and the object side surface of the third spacer in the optical axis direction and the central thickness CT3 of the third lens on the optical axis satisfy: 1.0 < EP23 / CT3 < 2.0. By controlling the ratio of the spacing distance between the image side surface of the second spacer and the object side surface of the third spacer in the optical axis direction to the central thickness of the third lens on the optical axis within a reasonable range, the uniformity of the overall thickness of the third lens can be ensured, the forming stability of the third lens can be improved, and the lens yield can be enhanced.

[0064] In an exemplary embodiment, when the spacer group includes a first spacer, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, and the inner diameter d1s of the object side surface of the first spacer satisfy: 3.0 < (R1 + R2) / d1s < 4.5. The inner diameter of the object side surface of the first spacer can be understood as the inner diameter of the plane perpendicular to the optical axis of the object side surface of the first spacer. By controlling this condition, it is possible to ensure that the light is quickly converged through the first lens and the light passing aperture is converged; at the same time, by controlling the inner diameter of the object side surface of the first spacer, the internal reflection stray light in the first lens can be effectively blocked, and the imaging quality of the lens can be improved.

[0065] In an exemplary embodiment, when the spacer group includes a first spacer, the axial distance EP01 from the object-side end face of the lens barrel to the object-side surface of the first spacer along the optical axis and the axial distance SAG11 between the intersection of the object-side surface of the first lens and the optical axis and the effective radius vertex of the object-side surface of the first lens satisfy: 1.2 < EP01 / |SAG11| < 2.0. By controlling this condition, it helps with the surface shapes of the object-side and image-side surfaces of the first lens, weakens the ghost image intensity generated by reflection from these two surfaces when the light beam at a specific incident angle passes through the lens, and improves the imaging quality of the optical system. At the same time, by controlling the axial distance from the object-side end face of the lens barrel to the object-side surface of the first spacer, it can also ensure that the object-side surface of the first lens does not protrude beyond the object-side end face of the lens barrel, avoiding scratches on the appearance of the lens and improving the appearance yield.

[0066] In an exemplary embodiment, when the spacer group includes a fifth spacer, the inner diameter d5m of the image-side surface of the fifth spacer, the inner diameter d5s of the object-side surface of the fifth spacer, and the curvature radius R11 of the object-side surface of the sixth lens satisfy: 0.15 < (d5m - d5s) / R11 < 0.6. The inner diameter of the image-side surface of the fifth spacer can be understood as the inner diameter of the plane perpendicular to the optical axis of the image-side surface of the fifth spacer; the inner diameter of the object-side surface of the fifth spacer can be understood as the inner diameter of the plane perpendicular to the optical axis of the object-side surface of the fifth spacer. By controlling the curvature radius of the object-side surface of the sixth lens, it helps to control the projection height of the light on the sixth lens, and thus control the aperture of the sixth lens. However, at the same time, it will also cause too large a deflection angle of the light between the fifth lens and the sixth lens, generating primary stray light deflected from the image-side surface of the fifth lens to the fifth spacer. By controlling the inner diameters of the object-side and image-side surfaces of the fifth spacer, it helps to avoid stray light and improve the imaging quality of the optical imaging lens.

[0067] In an exemplary embodiment, when the spacer group includes a fifth spacer, the inner diameter d5s of the object-side surface of the fifth spacer and the curvature radius R11 of the object-side surface of the sixth lens satisfy: 2.0 < d5s / R11 < 3.2. The inner diameter of the object-side surface of the fifth spacer can be understood as the inner diameter of the plane perpendicular to the optical axis of the object-side surface of the fifth spacer. By controlling the curvature radius of the object-side surface of the sixth lens, the deflection angle of the light can be reduced, improving the imaging quality of the optical imaging lens. In addition, by controlling the inner diameter of the fifth spacer near the image side, it can effectively control the bearing width and effectively block stray light, improving the imaging quality.

[0068] In an exemplary embodiment, when the spacer group includes a fourth spacer and a fifth spacer, the spacing distance EP45 between the image side surface of the fourth spacer and the object side surface of the fifth spacer in the optical axis direction and the axial distance SAG51 between the intersection point of the object side surface of the fifth lens and the optical axis and the effective radius vertex of the object side surface of the fifth lens satisfy: 0.5 < EP45 / |SAG51| < 1.3. By controlling this condition, the incident angle of the chief ray on the object side surface of the fifth lens can be effectively reduced, and the matching degree between the optical imaging lens and the chip can be improved. At the same time, by controlling the spacing distance between the image side surface of the fourth spacer and the object side surface of the fifth spacer in the optical axis direction, it helps to control the edge thickness of the fifth lens, helps to avoid stray light reflected from the edge of the effective diameter of the fifth lens to the fifth spacer, and improves the imaging quality of the optical system.

[0069] In an exemplary embodiment, when the spacer group includes a sixth spacer, the maximum thickness CP6 of the sixth spacer in the optical axis direction, and the spacing distance T67 between the sixth lens and the seventh lens on the optical axis satisfy: 0.4 < CP6 / T67 < 0.7. By controlling this condition, it helps to reasonably distribute the central thickness and edge thickness of the sixth lens and the seventh lens, helps to make the lens size distribution uniform, and is beneficial to reducing the lens processing and assembly difficulty.

[0070] In an exemplary embodiment, when the spacer group includes a fifth spacer, the combined focal length f56 of the fifth lens and the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, the central thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer in the optical axis direction satisfy: 1.3 < f56 / R12 * (CP5 / CT5) < 3.8. For example, 1.3 < f56 / R12 * (CP5 / CT5) < 2.5. By controlling the maximum thickness of the fifth spacer in the optical axis direction and the central thickness of the fifth lens on the optical axis, it helps to ensure the uniformity of the overall thickness of the fifth lens and improve the processability of the fifth lens. At the same time, by controlling the ratio between the combined focal length of the fifth lens and the sixth lens and the radius of curvature of the image side surface of the sixth lens, it helps to correct the chromatic aberration of the system and achieve the balance of various aberrations.

[0071] In an exemplary embodiment, the inner diameter d0s of the object side surface of the lens barrel, the inner diameter d0m of the image side surface of the lens barrel, and the effective focal length f7 of the seventh lens satisfy: -1.5 < (d0m - d0s) / f7 < -1.2. By controlling this condition, it helps to control the overall light height of the optical imaging lens, control the overall outer shape size of the lens barrel, and realize the miniaturization of the lens.

[0072] In an exemplary embodiment, when the spacer group includes a fourth spacer, the outer diameter D4s of the object side surface of the fourth spacer, the maximum effective radius DT32 of the image side surface of the third lens, and the maximum thickness CP4 of the fourth spacer along the optical axis direction satisfy: 11 < (D4s - DT32) / CP4 < 20.5. By controlling this condition, the strength of the fourth spacer can be ensured, and it can be ensured that the fourth spacer and the lens barrel jointly play an auxiliary supporting role during the assembly of the fifth lens, improving the assembly stability of the optical imaging lens and increasing the yield. At the same time, by controlling the maximum effective radius of the image side surface of the third lens, it helps to reduce the incident angle of marginal rays, eliminate the assembly step difference from the first lens to the fourth lens, and improve the assembly stability.

[0073] In an exemplary embodiment, when the spacer group includes a sixth spacer, the inner diameter d6m of the image side surface of the sixth spacer, the curvature radius R12 of the image side surface of the sixth lens, the effective focal length f6 of the sixth lens, and the maximum thickness CP6 of the sixth spacer along the optical axis direction satisfy: 31 < d6m / R12 * (f6 / CP6) < 66. By controlling the curvature radius of the image side surface of the sixth lens, the light ray angle of the marginal field of view can be controlled within a reasonable range, effectively reducing the sensitivity of the system. At the same time, reasonably controlling the sixth lens is beneficial to improving chromatic aberration, reducing the overall length of the system, and expanding the system aperture.

[0074] In an exemplary embodiment, when the spacer group includes a sixth spacer, the maximum thickness CP6 of the sixth spacer along the optical axis direction, the spacing distance T67 between the sixth lens and the seventh lens on the optical axis, the axial distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the vertex of the effective radius of the object side surface of the seventh lens, and the axial distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis and the vertex of the effective radius of the image side surface of the sixth lens satisfy: 1.0 ≤ (T67 - CP6) / (|SAG71| - |SAG62|) < 1.6. By controlling this condition, it helps to ensure that the lens has a large refractive power for the off-axis field of view, which is beneficial to shortening the overall length of the lens and improving the resolution of the system.

[0075] In an embodiment of the present application, at least one of the surfaces of each of the first lens to the seventh lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously 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 of the first lens to the eighth lens are aspherical surfaces.

[0076] According to the above-mentioned embodiment of the present application, the optical imaging lens can use seven lenses, a lens barrel and a spacer group. By reasonably allocating parameters such as each lens, lens barrel and each spacer, stray light can be reduced, and the miniaturization and large image surface characteristics of the optical imaging lens can be achieved, thereby improving the imaging quality and assembly stability of the optical imaging lens.

[0077] 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 optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0078] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0079] Example 1

[0080] The following reference Figure 3 An optical imaging lens according to Embodiment 1 of the present application is described.

[0081] like Figure 3 As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel.

[0082] The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence from the optical axis to the image side. The aperture STO ( Figure 3 (not shown) may be disposed on the object side of the object-side surface of the first lens E1.

[0083] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter or protective glass has an object side surface S15 (not shown) and an image side surface S16 (not shown). Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0084] 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 sixth spacer P6 placed in the lens barrel P0. In the example, 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 P0 better supported, thereby enhancing the structural stability of the optical imaging lens.

[0085] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0086]

[0087] Table 1

[0088] In this embodiment, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 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:

[0089]

[0090] 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 2 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, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 , A 30 .

[0091]

[0092]

[0093] Table 2

[0094] For other parameters of Example 1, please refer to Table 7 and Table 8.

[0095] Example 2

[0096] The following reference Figure 4 An optical imaging lens according to Embodiment 2 of the present application is described.

[0097] like Figure 4 As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence along the optical axis to the image side.

[0098] The basic parameter table of the optical imaging lens of this embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. The difference between this embodiment and Embodiment 1 is that the structural dimensions of at least some elements in the spacer group are different from those in Embodiment 1, for example, the structural dimension of the inner diameter d5s of the object side surface of the fifth spacer is different from that of Embodiment 1, and the structural dimension of the inner diameter d6s of the object side surface of the sixth spacer is different from that of Embodiment 1. For details, please refer to the data corresponding to Embodiment 2 in Table 8.

[0099] Example 3

[0100] The following reference Figure 5 An optical imaging lens according to Embodiment 3 of the present application is described.

[0101] like Figure 5 As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence along the optical axis to the image side.

[0102] The basic parameter table of the optical imaging lens of this embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. The difference between this embodiment and Embodiment 1 is that the structural dimensions of at least some elements in the spacer group are different from those in Embodiment 1, for example, the structural dimension of the inner diameter d5s of the object side surface of the fifth spacer is different from that in Embodiment 1, and the structural dimension of the inner diameter d6s of the object side surface of the sixth spacer is different from that in Embodiment 1. For details, please refer to the data corresponding to Embodiment 3 in Table 8.

[0103] refer to FIG. 6A to FIG. 6D As shown, Fig. 6A The axial chromatic aberration curve of the optical imaging lens of Example 1, 2 or 3 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical imaging lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 1, 2 or 3 is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 6CThe distortion curve of the optical imaging lens of Example 1, 2 or 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.6D The magnification chromatic aberration curve of the optical imaging lens of Example 1, 2 or 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6D It can be seen that the optical imaging lens of Example 1, 2 or 3 can achieve good imaging quality.

[0104] Example 4

[0105] The following reference Figure 7 An optical imaging lens according to Embodiment 4 of the present application is described.

[0106] like Figure 7 As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel.

[0107] The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence from the optical axis to the image side. The aperture STO ( Figure 7 (not shown) may be disposed on the object side of the object-side surface of the first lens E1.

[0108] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter or protective glass has an object side surface S15 (not shown) and an image side surface S16 (not shown). Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0109] 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 sixth spacer P6 placed in the lens barrel P0. In the example, 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 P0 better supported, thereby enhancing the structural stability of the optical imaging lens.

[0110] Table 3 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0111]

[0112]

[0113] Table 3

[0114] In this embodiment, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 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:

[0115]

[0116] 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 4 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, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 , A 30 .

[0117]

[0118]

[0119] Table 4

[0120] For other parameters of Example 4, please refer to Table 7 and Table 8.

[0121] Example 5

[0122] The following reference Figure 8 An optical imaging lens according to Embodiment 5 of the present application is described.

[0123] like Figure 8As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence along the optical axis to the image side.

[0124] The basic parameter table of the optical imaging lens of this embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. The difference between this embodiment and Embodiment 4 is that the structural dimensions of at least some elements in the spacer group are different from those in Embodiment 4, for example, the structural dimension of the inner diameter d5s of the object side surface of the fifth spacer is different from that of Embodiment 4, and the structural dimension of the inner diameter d6s of the object side surface of the sixth spacer is different from that of Embodiment 4. For details, please refer to the data corresponding to Embodiment 5 in Table 8.

[0125] Example 6

[0126] The following reference Fig. 9 An optical imaging lens according to Example 6 of the present application is described.

[0127] like Fig. 9 As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence along the optical axis to the image side.

[0128] The basic parameter table of the optical imaging lens of this embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. The difference between this embodiment and Embodiment 4 is that the structural dimensions of at least some elements in the spacer group are different from those in Embodiment 4, for example, the structural dimension of the inner diameter d5s of the object side surface of the fifth spacer is different from that in Embodiment 4, and the structural dimension of the inner diameter d6s of the object side surface of the sixth spacer is different from that in Embodiment 4. For details, please refer to the data corresponding to Embodiment 6 in Table 8.

[0129] refer to FIG. 10A to FIG. 10D As shown, Fig. 10A The axial chromatic aberration curve of the optical imaging lens of Example 4, 5 or 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig. 10B The astigmatism curve of the optical imaging lens of Example 4, 5 or 6 is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Fig. 10C The distortion curve of the optical imaging lens of Example 4, 5 or 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 10D The magnification chromatic aberration curve of the optical imaging lens of Example 4, 5 or 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 10D It can be seen that the optical imaging lens of Example 4, 5 or 6 can achieve good imaging quality.

[0130] Example 7

[0131] The following reference Fig.11 An optical imaging lens according to Embodiment 7 of the present application is described.

[0132] like Fig.11 As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel.

[0133] The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence from the optical axis to the image side. The aperture STO ( Fig.11 (not shown) may be disposed on the object side of the object-side surface of the first lens E1.

[0134] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter or protective glass has an object side surface S15 (not shown) and an image side surface S16 (not shown). Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0135] 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 sixth spacer P6 placed in the lens barrel P0. In the example, 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 P0 better supported, thereby enhancing the structural stability of the optical imaging lens.

[0136] Table 5 shows the basic parameters of the optical imaging lens of Example 7, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0137]

[0138] Table 5

[0139] In this embodiment, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 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:

[0140]

[0141] 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 6 gives 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, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 , A 30 .

[0142]

[0143] Table 6

[0144] For other parameters of Example 7, please refer to Table 7 and Table 8.

[0145] Example 8

[0146] The following reference Fig.12 An optical imaging lens according to Example 6 of the present application is described.

[0147] like Fig.12 As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence along the optical axis to the image side.

[0148] The basic parameter table of the optical imaging lens of this embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. The difference between this embodiment and Embodiment 7 is that the structural dimensions of at least some elements in the spacer group are different from those in Embodiment 7, for example, the structural dimension of the inner diameter d5s of the object side surface of the fifth spacer is different from that of Embodiment 7, and the structural dimension of the inner diameter d6s of the object side surface of the sixth spacer is different from that of Embodiment 7. For details, please refer to the data corresponding to Embodiment 8 in Table 8.

[0149] Example 9

[0150] The following reference Fig.13 An optical imaging lens according to Example 9 of the present application is described.

[0151] like Fig.13 As shown, the optical imaging lens includes an optical lens group, a spacer group and a lens barrel. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6 and the seventh lens E7 are arranged in sequence along the optical axis to the image side.

[0152] The basic parameter table of the optical imaging lens of this embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. The difference between this embodiment and Embodiment 7 is that: The structural dimensions of at least some elements in the spacer group are different from those in Embodiment 7, for example, the structural dimension of the inner diameter d5s of the object side surface of the fifth spacer is different from that of Embodiment 7, and the structural dimension of the inner diameter d6s of the object side surface of the sixth spacer is different from that of Embodiment 7. For details, please refer to the data corresponding to Embodiment 9 in Table 8.

[0153] refer to FIG. 14A to FIG. 14D As shown, Fig.14A The axial chromatic aberration curve of the optical imaging lens of Example 7, 8 or 9 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig. 14B The astigmatism curve of the optical imaging lens of Example 7, 8 or 9 is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Fig. 14C The distortion curve of the optical imaging lens of Example 7, 8 or 9 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.14D The magnification chromatic aberration curve of the optical imaging lens of Example 7, 8 or 9 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 14A to FIG. 14D It can be seen that the optical imaging lens of Example 7, 8 or 9 can achieve good imaging quality.

[0154] Table 7 shows the values ​​of optical parameters such as |SAG11|, |SAG51|, |SAG62|, |SAG71|, DT42, and DT32 of each of Examples 1 to 9.

[0155]

[0156] Table 7

[0157] Table 8 shows the values ​​of parameters such as d1s, d4s, D4s, D4m, d5s, d5m, D5s, d6s, d6m, d0s, d0m, EP01, EP23, EP45, CP5 and CP6 of each embodiment in Examples 1 to 9. Among them, some of the above parameters can be measured according to the marking method shown in Figure 1, and the units of the parameters listed in Table 8 are all mm.

[0158]

[0159]

[0160] Table 8

[0161] Table 9 shows the values ​​of the conditional expressions of each of Examples 1 to 9.

[0162] Table 9

[0163] 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 optical imaging lens described above.

[0164] 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 invention 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 this application (but not limited to) by each other.

Claims

1. An optical imaging lens, characterized in that: include: An optical lens group, comprising, in order from the object side to the image side along the optical axis, a first lens having positive power, a second lens having negative power, a third lens having negative power, a fourth lens having positive power, a fifth lens having positive power, a sixth lens having positive power, and a seventh lens having negative power; a spacer group, comprising a fifth spacer and a sixth spacer, wherein the fifth spacer is disposed between the fifth lens and the sixth lens and at least partially contacts the fifth lens, and the sixth spacer is disposed between the sixth lens and the seventh lens and at least partially contacts the sixth lens; A lens barrel, accommodating the optical lens group and the spacer group; The maximum thickness CP6 of the sixth spacer along the optical axis is greater than the center thickness CT6 of the sixth lens on the optical axis; An inner diameter d5s of the object side surface of the fifth spacer, an inner diameter d6s of the object side surface of the sixth spacer, and a spacing distance T56 between the fifth lens and the sixth lens on the optical axis satisfy: 4.5<(d6s-d5s) / T56<8.

0.

2. The optical imaging lens according to claim 1, wherein: The spacer set further includes a fourth spacer, the fourth spacer being disposed between the fourth lens and the fifth lens and at least partially in contact with the fourth lens; The inner diameter d4s of the object side surface of the fourth spacer and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 2.0 <d4s / DT42<2.8。 3. The optical imaging lens according to claim 1, wherein: The spacer set further includes a fourth spacer, the fourth spacer being disposed between the fourth lens and the fifth lens and at least partially in contact with the fourth lens; The distance EP45 between the image side surface of the fourth spacer and the object side surface of the fifth spacer along the optical axis, the outer diameter D5s of the object side surface of the fifth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy: 0.1 <EP45 / (D5s-D4m)<0.6。 4. The optical imaging lens according to claim 1, wherein: The spacer set further includes a second spacer and a third spacer, the second spacer being disposed between the second lens and the third lens and at least partially in contact with the second lens, the third spacer being disposed between the third lens and the fourth lens and at least partially in contact with the third lens; The distance EP23 between the image side surface of the second spacer and the object side surface of the third spacer along the optical axis and the center thickness CT3 of the third lens on the optical axis satisfy: 1.0 <EP23 / CT3<2.0。 5. The optical imaging lens according to claim 1, wherein: The spacer set further includes a first spacer disposed between the first lens and the second lens and at least partially in contact with the first lens; A curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, and an inner diameter d1s of the object-side surface of the first spacer satisfy: 3.0<(R1+R2) / d1s<4.

5.

6. The optical imaging lens according to claim 1, wherein: The spacer set further includes a first spacer disposed between the first lens and the second lens and at least partially in contact with the first lens; The distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer along the optical axis and the on-axis distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens satisfy: 1.2 <EP01 / |SAG11|<2.0。 7. The optical imaging lens according to claim 1, wherein: The spacer set further includes a fourth spacer, the fourth spacer being disposed between the fourth lens and the fifth lens and at least partially in contact with the fourth lens; The spacing distance EP45 between the image side surface of the fourth spacer and the object side surface of the fifth spacer along the optical axis and the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens satisfy: 0.5 <EP45 / |SAG51|<1.3。 8. The optical imaging lens according to claim 1, wherein: The spacer set further includes a fourth spacer, the fourth spacer being disposed between the fourth lens and the fifth lens and at least partially in contact with the fourth lens; The outer diameter D4s of the object side surface of the fourth spacer, the maximum effective radius DT32 of the image side surface of the third lens, and the maximum thickness CP4 of the fourth spacer along the optical axis direction satisfy: 11<(D4s-DT32) / CP4<20.

5.

9. The optical imaging lens according to any one of claims 1 to 8, characterized in that: The inner diameter d6m of the image side surface of the sixth spacer, the curvature radius R12 of the image side surface of the sixth lens, the effective focal length f6 of the sixth lens, and the maximum thickness CP6 of the sixth spacer along the optical axis direction satisfy: <d6m / R12*(f6 / CP6)<66。 10. The optical imaging lens according to any one of claims 1 to 8, characterized in that: The maximum thickness CP6 of the sixth spacer along the optical axis, the spacing distance T67 between the sixth lens and the seventh lens on the optical axis, the on-axis distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh lens, and the on-axis distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens satisfy: 1.0≤(T67-CP6) / (|SAG71|-|SAG62|)<1.

6.

11. The optical imaging lens according to any one of claims 1 to 8, characterized in that: An inner diameter d5m of the image side surface of the fifth spacer, an inner diameter d5s of the object side surface of the fifth spacer, and a curvature radius R11 of the object side surface of the sixth lens satisfy: 0.15<(d5m-d5s) / R11<0.

6.

12. The optical imaging lens according to any one of claims 1 to 8, characterized in that: The inner diameter d5s of the object side surface of the fifth spacer and the curvature radius R11 of the object side surface of the sixth lens satisfy: 2.0 <d5s / R11<3.2。 13. The optical imaging lens according to any one of claims 1 to 8, characterized in that: The maximum thickness CP6 of the sixth spacer along the optical axis direction, the spacing distance T67 between the sixth lens and the seventh lens on the optical axis satisfies: 0.4 <CP6 / T67<0.7。 14. The optical imaging lens according to any one of claims 1 to 8, characterized in that: The combined focal length f56 of the fifth lens and the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, the center thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer along the optical axis direction satisfy: 1.3 <f56 / R12*(CP5 / CT5)<3.8。 15. The optical imaging lens according to any one of claims 1 to 8, characterized in that: An inner diameter d0s of the object side surface of the lens barrel, an inner diameter d0m of the image side surface of the lens barrel, and an effective focal length f7 of the seventh lens satisfy: -1.5<(d0m-d0s) / f7<-1.2.

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