Optical imaging lens

Abstract

The utility model discloses an optical imaging lens, which comprises an optical lens group and a spacing element group, and the optical lens group sequentially comprises a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group and a sixth lens group from an object side to an image surface along an optical axis, the second lens group comprises a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with focal power and a sixth lens with positive focal power; a third lens group including a seventh lens having a negative refractive power; the spacing element group comprises a fourth spacing element in contact with the image side surface of the fourth lens and a fifth spacing element in contact with the image side surface of the fifth lens; the effective focal length F2 of the second lens group and the combined focal length f45 of the fourth lens and the fifth lens meet the formula:-7.5 < = f45 / F2lt; -4.5,-4.5; a center thickness CT5 of the fifth lens on the optical axis, an air interval T56 of the fifth lens and the sixth lens on the optical axis, and an interval EP45 of the fourth spacing element and the fifth spacing element along the optical axis satisfy: 1.0 lt; (CT5 + T56) / EP45lt; and 3.5.

Description

Technical Field

[0001] The present application relates to the field of optical devices, and particularly to an optical imaging lens composed of three lens groups. Background Art

[0002] In recent years, smart products have been updated and iterated rapidly, and among them, the lens for the functions of photographing and video recording is a key component for update and iteration. Taking a smart phone as an example, a smart phone usually is equipped with a front small head lens and rear telephoto, wide-angle, and ultra-wide-angle lenses to meet the shooting requirements of multiple scenarios and multiple focal lengths. The switching and zooming processes of different lenses in a smart phone often adopt the method of digital zoom. However, image quality loss will occur during the digital zoom process, thus affecting the overall imaging effect. Utility Model Content

[0003] 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.

[0004] On the one hand, the present application provides such an optical imaging lens, which includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel, a second lens barrel, and a third lens barrel arranged in sequence from the object side to the image plane along the optical axis; wherein, the optical lens group includes, in sequence from the object side to the image plane along the optical axis: a first lens group placed in the first lens barrel, including a first lens with a focal power; a second lens group placed in the second lens barrel and having a positive focal power, including a second lens with a positive focal power, a third lens with a negative focal power, a fourth lens with a negative focal power, a fifth lens with a focal power, and a sixth lens with a positive focal power; and a third lens group placed in the third lens barrel, including a seventh lens with a negative focal power; the positions of the first lens group and the third lens group on the optical axis relative to the image plane are fixed, and the distance of the second lens group on the optical axis relative to the first lens group is adjustable; the spacer element group includes a fourth spacer element placed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element placed on the image side surface of the fifth lens and in contact with the image side surface of the fifth lens; the effective focal length F2 of the second lens group and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -7.5 ≤ f45 / F2 < -4.5; the central thickness CT5 of the fifth lens on the optical axis, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the gap EP45 between the fourth spacer element and the fifth spacer element along the optical axis satisfy: 1.0 < (CT5 + T56) / EP45 < 3.5.

[0005] According to an exemplary embodiment of the present application, the spacer element group further includes a third spacer element disposed on and in contact with the image side surface of the third lens. Wherein, the central thickness CT4 of the fourth lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, and the spacer EP34 between the third spacer element and the fourth spacer element along the optical axis satisfy: 0.5 < EP34 / (CT4 + T45) < 1.5.

[0006] According to an exemplary embodiment of the present application, the inner diameter d4s of the object side surface of the fourth spacer element, the central thickness CT4 of the fourth lens on the optical axis, and the refractive index N4 of the fourth lens satisfy: 6.0 < d4s / (N4 × CT4) < 8.0.

[0007] According to an exemplary embodiment of the present application, the inner diameter d5s of the object side surface of the fifth spacer element, the central thickness CT5 of the fifth lens on the optical axis, and the refractive index N5 of the fifth lens satisfy: 4.0 < d5s / (N5 × CT5) ≤ 7.0.

[0008] According to an exemplary embodiment of the present application, the spacer element group further includes a second spacer element disposed on and in contact with the image side surface of the second lens and a third spacer element disposed on and in contact with the image side surface of the third lens. Wherein, the effective focal length F2 of the second lens group and the combined focal length f23 of the second lens and the third lens satisfy: 1.3 ≤ f23 / F2 ≤ 1.6; the central thickness CT3 of the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the spacer EP23 between the second spacer element and the third spacer element along the optical axis satisfy: 0.3 ≤ (T34 - EP23) / CT3 < 1.5.

[0009] According to an exemplary embodiment of the present application, the spacer element group further includes a second spacer element disposed on and in contact with the image side surface of the second lens. Wherein, the effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the spacer EP022 between the object side end surface of the second lens barrel and the second spacer element along the optical axis satisfy: 3.5 < (f2 / N2) / EP022 ≤ 5.0.

[0010] According to an exemplary embodiment of the present application, the spacer element group further includes a second spacer element disposed on and in contact with the image side surface of the second lens. Wherein, the central thickness CT2 of the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the spacer EP022 between the object side end surface of the second lens barrel and the second spacer element along the optical axis satisfy: 1.0 ≤ CT2 / (EP022 - T23) ≤ 1.3.

[0011] According to an exemplary embodiment of the present application, the effective focal length f6 of the sixth lens, the inner diameter d5s of the object side surface of the fifth spacer element, and the outer diameter D5m of the image side surface of the fifth spacer element satisfy: 2.0 < f6 / (D5m - d5s) < 4.0.

[0012] According to an exemplary embodiment of the present application, the combined focal length f45 of the fourth lens and the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer element, and the outer diameter D4m of the image side surface of the fourth spacer element satisfy: -27.5 < f45 / (D4m - d4s) < -11.

[0013] According to an exemplary embodiment of the present application, the inner diameter d02m of the image side end surface of the second lens barrel and the effective focal length F2 of the second lens group satisfy: 1.5 < d02m / F2 ≤ 1.8.

[0014] According to an exemplary embodiment of the present application, the inner diameter d02s of the object side end surface of the second lens barrel, the outer diameter D02m of the image side end surface of the second lens barrel, and the length L2 of the second lens barrel in the direction of the optical axis satisfy: 1.5 ≤ (D02m - d02s) / L2 < 1.7.

[0015] According to an exemplary embodiment of the present application, the outer diameter D02m of the image side end surface of the second lens barrel, the inner diameter d03s of the object side end surface of the third lens barrel, and the maximum movable distance ΔEP0 of the second lens barrel in the direction of the optical axis satisfy: 2.0 < (d03s - D02m) / ΔEP0 < 3.5.

[0016] According to an exemplary embodiment of the present application, the length L1 of the first lens barrel in the direction of the optical axis, the length L2 of the second lens barrel in the direction of the optical axis, the length L3 of the third lens barrel in the direction of the optical axis, and the maximum movable distance ΔEP0 of the second lens barrel in the direction of the optical axis satisfy: 25 < (L1 + L2 + L3) / ΔEP0 ≤ 31.

[0017] The optical imaging lens provided by the present application includes three lens groups, and the three lens groups are respectively assembled in three lens barrels. Zooming of the optical imaging lens can be achieved by moving the second lens group. In addition, by controlling the ratio of the combined focal length of the fourth lens and the fifth lens to the effective focal length of the second lens group, and by controlling the relationship between the central thickness of the fifth lens on the optical axis, the air gap between the fifth lens and the sixth lens on the optical axis, and the interval between the fourth spacer element and the fifth spacer element along the optical axis, while ensuring that the second lens group meets the spatial size requirements, the spatial allocation and processability of the fifth lens and the sixth lens can be ensured. Description of the Drawings

[0018] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings, in which:

[0019] Figure 1 Shows a parameter annotation diagram of an optical imaging lens according to the present application;

[0020] Figure 2 Shows a schematic structural diagram of an optical lens group according to Embodiment 1, 2 or 3 of the present application;

[0021] Figure 3 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application;

[0022] Figure 4 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application;

[0023] Figure 5 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application;

[0024] Figures 6A to 6C Respectively show the axial chromatic aberration curve, astigmatism curve and distortion curve of the long focal length state (for example, the distance between the object and the optical imaging lens is infinite) of the optical imaging lens according to Embodiment 1, 2 or 3 of the present application;

[0025] Figures 7A to 7C Respectively show the axial chromatic aberration curve, astigmatism curve and distortion curve of the short focal length state (for example, the distance between the object and the optical imaging lens is 150 mm) of the optical imaging lens according to Embodiment 1, 2 or 3 of the present application;

[0026] Figure 8 Shows a schematic structural diagram of an optical lens group according to Embodiment 4, 5 or 6 of the present application;

[0027] Figure 9 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application;

[0028] Figure 10 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application;

[0029] Figure 11 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application;

[0030] Figures 12A to 12C Respectively show the axial chromatic aberration curve, astigmatism curve and distortion curve of the long focal length state (for example, the distance between the object and the optical imaging lens is infinite) of the optical imaging lens according to Embodiment 4, 5 or 6 of the present application;

[0031] Figures 13A to 13CThe axial chromatic aberration curve, astigmatism curve, and distortion curve of the short focal length state of the optical imaging lens according to Embodiment 4, 5, or 6 of the present application are respectively shown (for example, the distance between the object and the optical imaging lens is 150 mm);

[0032] Figure 14 The structural schematic diagram of the optical lens group according to Embodiment 7, 8, or 9 of the present application is shown;

[0033] Figure 15 The structural schematic diagram of the optical imaging lens according to Embodiment 7 of the present application is shown;

[0034] Figure 16 The structural schematic diagram of the optical imaging lens according to Embodiment 8 of the present application is shown;

[0035] Figure 17 The structural schematic diagram of the optical imaging lens according to Embodiment 9 of the present application is shown;

[0036] Figures 18A to 18C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the long focal length state of the optical imaging lens according to Embodiment 7, 8, or 9 of the present application are respectively shown (for example, the distance between the object and the optical imaging lens is infinity); and

[0037] Figures 19A to 19C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the short focal length state of the optical imaging lens according to Embodiment 7, 8, or 9 of the present application are respectively shown (for example, the distance between the object and the optical imaging lens is 150 mm). Detailed Description of the Embodiments

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

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

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

[0041] In this text, 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 being photographed is called the object side surface of the lens, and the surface of each lens closest to the image plane is called the image side surface of the lens.

[0042] It should also be understood that the terms "comprising" 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 use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0043] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0044] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0045] Figure 1 It is a parameter annotation diagram of an optical imaging lens according to an exemplary embodiment of the present application. Refer to Figure 1 , L1 represents the length of the first lens barrel in the direction of the optical axis, L2 represents the length of the second lens barrel in the direction of the optical axis, L3 represents the length of the third lens barrel in the direction of the optical axis, d02s represents the inner diameter of the object side end face of the second lens barrel, d02m represents the inner diameter of the image side end face of the second lens barrel, D02m represents the outer diameter of the image side end face of the second lens barrel, d03s represents the inner diameter of the object side end face of the third lens barrel, d4s represents the inner diameter of the object side surface of the fourth spacer element, D4m represents the outer diameter of the image side surface of the fourth spacer element, d5s represents the inner diameter of the object side surface of the fifth spacer element, D5m represents the outer diameter of the image side surface of the fifth spacer element, ΔEP0 represents the maximum movable distance of the second lens barrel in the optical axis direction, EP022 represents the interval between the object side end face of the second lens barrel and the second spacer element along the optical axis, EP23 represents the interval between the second spacer element and the third spacer element along the optical axis, EP34 represents the interval between the third spacer element and the fourth spacer element along the optical axis, and EP45 represents the interval between the fourth spacer element and the fifth spacer element along the optical axis.

[0046] Reference Figures 2 to 5 、 Figures 8 to 11 and Figures 14 to 17 , a first aspect of the present application provides an optical imaging lens. The optical imaging lens may include an optical lens group, and the optical lens group may include a first lens group, a second lens group, and a third lens group arranged in sequence from the object side to the image plane along the optical axis. In the first lens group to the third lens group, there may be an air gap between any two adjacent lens groups.

[0047] Among them, the positions of the first lens group and the third lens group on the optical axis relative to the image plane are fixed. The second lens group is movable relative to the first lens group along the optical axis, that is, the distance between the second lens group and the first lens group on the optical axis is adjustable. When the distance between the object and the optical imaging lens changes from far to near, adjusting the distance between the second lens group and the first lens group on the optical axis can enable the optical imaging lens to switch between the telephoto state and the wide-angle state, realizing the zoom of the optical imaging lens.

[0048] In an exemplary embodiment, the optical imaging lens may further include a lens barrel assembly, and the lens barrel assembly may include a first lens barrel, a second lens barrel, and a third lens barrel arranged in sequence from the object side to the image plane along the optical axis. The first lens group may be disposed in the first lens barrel. The second lens group may be disposed in the second lens barrel. The third lens group may be disposed in the third lens barrel. Correspondingly, the first lens barrel and the third lens barrel are fixed components, and their positions relative to the image plane are fixed; the second lens barrel is a movable component, and it can move with the movement of the second lens group during the zooming process of the optical imaging lens.

[0049] In an exemplary embodiment, the first lens group may include a first lens having a focal power.

[0050] In an exemplary embodiment, the second lens group may have a positive focal power, and sequentially include a second lens having a positive focal power, a third lens having a negative focal power, a fourth lens having a negative focal power, a fifth lens having a focal power, and a sixth lens having a positive focal power from the object side to the image plane along the optical axis.

[0051] In an exemplary embodiment, the third lens group may include a seventh lens having a negative focal power.

[0052] In an exemplary embodiment, the optical imaging lens may further include one or more of a second spacer element, a third spacer element, a fourth spacer element, and a fifth spacer element. The second spacer element may be disposed on the image side of the second lens and at least partially in contact with the image side of the second lens. The third spacer element may be disposed on the image side of the third lens and at least partially in contact with the image side of the third lens. The fourth spacer element may be disposed on the image side of the fourth lens and at least partially in contact with the image side of the fourth lens. The fifth spacer element may be disposed on the image side of the fifth lens and at least partially in contact with the image side of the fifth lens. Reasonable use of the spacer elements can effectively avoid the risk of stray light, reduce the interference to the image quality, and thus improve the imaging quality of the optical imaging lens. In the example, the second spacer element, the third spacer element, the fourth spacer element, and the fifth spacer element may be disposed within the second lens barrel.

[0053] In an exemplary embodiment, the second lens group may further include a diaphragm, and the diaphragm is disposed between the object side and the second lens.

[0054] In an exemplary embodiment, the effective focal length F2 of the second lens group and the combined focal length f45 of the fourth lens and the fifth lens may satisfy: -7.5 ≤ f45 / F2 < -4.5. Reasonable configuration of the ratio of the effective focal length of the second lens group to the combined focal length of the fourth lens and the fifth lens is beneficial to balancing the spatial size of the second lens group and restricting the axial length of the main lens group part.

[0055] In an exemplary embodiment, the central thickness CT5 of the fifth lens on the optical axis, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the interval EP45 between the fourth spacer element and the fifth spacer element along the optical axis satisfy: 1.0 < (CT5 + T56) / EP45 < 3.5. Reasonable control of the relationship between the central thickness of the fifth lens on the optical axis, the air gap between the fifth lens and the sixth lens on the optical axis, and the interval between the fourth spacer element and the fifth spacer element along the optical axis is beneficial to ensuring the spatial distribution and processability of the fifth lens and the sixth lens while ensuring that the second lens group meets the spatial size requirements.

[0056] The relationship between (CT5 + T56) / EP45 and the yield rate of the optical imaging lens will be further described below with reference to Table A, Table B, and Table C.

[0057] Table a shows the yield rate of the optical imaging lens when f45 / F2 = -4.96 and (CT5 + T56) / EP45 = 1.20, that is, when the optical imaging lens satisfies 1.0 < (CT5 + T56) / EP45 < 3.5. When the optical imaging lens does not satisfy 1.0 < (CT5 + T56) / EP45 < 3.5, for example, Table b shows the yield rate of the optical imaging lens under the conditions of f45 / F2 = -4.79 and (CT5 + T56) / EP45 = 4.1, and Table c shows the yield rate of the optical imaging lens under the conditions of f45 / F2 = -7.5 and (CT5 + T56) / EP45 = 3.8.

[0058] Judging from Table b and Table c, the yield rate of the optical imaging lens is relatively low. While judging from Table a, the yield rate of the optical imaging lens is relatively high. It can be seen that when the optical imaging lens satisfies "-7.5 ≤ f45 / F2 < -4.5", by adjusting the optical imaging lens to satisfy "1.0 < (CT5 + T56) / EP45 < 3.5", the yield rate of the optical imaging lens can be improved.

[0059] Number of inspections Number of qualified items Yield rate First group 618 219 35.44％ Second group 685 231 33.72％ Third group 711 275 38.68％ Fourth group 631 208 32.96％

[0060] Table a

[0061] Number of inspections Number of qualified items Yield rate First group 468 128 27.35％ Second group 669 169 25.26％ Third group 683 173 25.33％ Fourth group 581 144 24.78％

[0062] Table b

[0063] Number of inspections Number of qualified items Yield rate First group 518 131 25.29％ Second group 598 147 24.58％ Third group 530 105 19.81％ Fourth group 477 119 24.95％

[0064] Table c

[0065] In an exemplary embodiment, the central thickness CT4 of the fourth lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, and the interval EP34 between the third spacer element and the fourth spacer element along the optical axis satisfy: 0.5 < EP34 / (CT4 + T45) < 1.5. Reasonably controlling the relationship between the central thickness of the fourth lens on the optical axis, the air gap between the fourth lens and the fifth lens on the optical axis, and the interval between the third spacer element and the fourth spacer element along the optical axis is beneficial to restricting the ratio of the central thickness to the edge thickness of the fourth lens, improving the processability of the fourth lens and the feasibility in assembly, and avoiding problems such as the inability to process and form due to the too thin edge of the fourth lens or the too large assembly step difference caused by the too thick edge, which affects the assembly of the fourth lens group.

[0066] In an exemplary embodiment, the inner diameter d4s of the object side surface of the fourth spacer element, the central thickness CT4 of the fourth lens on the optical axis, and the refractive index N4 of the fourth lens may satisfy: 6.0 < d4s / (N4 × CT4) < 8.0. By reasonably configuring the ratio of the inner diameter of the object side surface of the fourth spacer element to the product of the central thickness and the refractive index of the fourth lens, when light passes through the fourth lens for a certain optical path, the clear aperture of the fourth lens can be restricted within a certain range, avoiding problems such as vignetting caused by too small a clear aperture of the fourth lens or obvious stray light caused by too large a clear aperture, and improving the imaging effect of the optical imaging lens.

[0067] In an exemplary embodiment, the inner diameter d5s of the object side surface of the fifth spacer element, the central thickness CT5 of the fifth lens on the optical axis, and the refractive index N5 of the fifth lens may satisfy: 4.0 < d5s / (N5 × CT5) ≤ 7.0. By reasonably configuring the ratio of the inner diameter of the object side surface of the fifth spacer element to the product of the central thickness and the refractive index of the fifth lens, when light passes through the fifth lens for a certain optical path, the clear aperture of the fifth lens can be restricted within a certain range, avoiding problems such as vignetting caused by too small a clear aperture of the fifth lens or obvious stray light caused by too large a clear aperture, and improving the imaging effect of the optical imaging lens.

[0068] In an exemplary embodiment, the effective focal length F2 of the second lens group and the combined focal length f23 of the second lens and the third lens may satisfy: 1.3 ≤ f23 / F2 ≤ 1.6. By reasonably configuring the ratio of the combined focal length of the second lens and the third lens to the effective focal length of the second lens group, it is beneficial to control the degree of light convergence of the second lens and the third lens, and then restrict the field of view angle and the total effective focal length of the optical imaging lens within a reasonable range, so as to be more suitable for the second lens group to perform moving zoom.

[0069] In an exemplary embodiment, the central thickness CT3 of the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the interval EP23 between the second spacer element and the third spacer element along the optical axis satisfy: 0.3 ≤ (T34 - EP23) / CT3 < 1.5. By reasonably controlling the relationship between the central thickness of the third lens on the optical axis, the air gap between the third lens and the fourth lens on the optical axis, and the interval between the second spacer element and the third spacer element along the optical axis, it is beneficial to allocate the front and rear air gaps of the third lens and the thickness of the spacer element, and improve the processability and assembly stability of the third lens.

[0070] In an exemplary embodiment, the effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the distance EP022 along the optical axis between the object-side end face of the second lens barrel and the second spacer element may satisfy: 3.5 < (f2 / N2) / EP022 ≤ 5.0. By reasonably controlling the relationship among the effective focal length of the second lens, the refractive index of the second lens, and the distance along the optical axis between the object-side end face of the second lens barrel and the second spacer element, the effective focal length, the edge thickness of the second lens, and the bearing thickness of the second lens barrel can be constrained within a certain range, avoiding the problem of unprocessable molding caused by the thin edge of the second lens. At the same time, the plastic filling of the object-side end face of the second lens barrel can be ensured, improving the molding feasibility of the second lens barrel and the second lens.

[0071] In an exemplary embodiment, the central thickness CT2 of the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the distance EP022 along the optical axis between the object-side end face of the second lens barrel and the second spacer element may satisfy: 1.0 ≤ CT2 / (EP022 - T23) ≤ 1.3. By reasonably controlling the relationship among the central thickness of the second lens on the optical axis, the air gap between the second lens and the third lens on the optical axis, and the distance along the optical axis between the object-side end face of the second lens barrel and the second spacer element, the central thickness of the second lens can be constrained within the processable range; at the same time, the air gap between the second lens and the third lens on the optical axis and the distance along the optical axis between the object-side end face of the second lens barrel and the second spacer element can be restricted, well ensuring the connection between the second lens and the third lens and ensuring the stability of the intermediate air gap when the second lens and the third lens are assembled, thereby improving the imaging field curvature stability and imaging quality of the optical imaging lens.

[0072] In an exemplary embodiment, the effective focal length f6 of the sixth lens, the inner diameter d5s of the object-side surface of the fifth spacer element, and the outer diameter D5m of the image-side surface of the fifth spacer element may satisfy: 2.0 < f6 / (D5m - d5s) < 4.0. Reasonably configuring the ratio of the effective focal length of the sixth lens to the difference between the outer diameter of the image-side surface and the inner diameter of the object-side surface of the fifth spacer element is beneficial to restricting the exit angle and exit range of the light rays exiting from the second lens group, enabling the second lens group to better match the third lens group during the zooming process of the optical imaging lens; at the same time, it is also beneficial to make the bandwidth of the fifth spacer element wider, ensuring a better light-blocking effect of the fifth spacer element while ensuring its processability and avoiding affecting the overall illuminance of the optical imaging lens due to the too wide bandwidth of the fifth spacer element.

[0073] In an exemplary embodiment, the combined focal length f45 of the fourth lens and the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer element, and the outer diameter D4m of the image side surface of the fourth spacer element may satisfy: -27.5 < f45 / (D4m - d4s) < -11. By reasonably configuring the ratio of the combined focal length of the fourth lens and the fifth lens to the difference between the outer diameter of the image side surface and the inner diameter of the object side surface of the fourth spacer element, the combined focal length of the fourth lens and the fifth lens can be made negative, ensuring better transition of light in the outer field of view; at the same time, the difference between the outer diameter of the image side surface and the inner diameter of the object side surface of the fourth spacer element can be constrained within a certain range, avoiding a large step difference between the fourth lens and the fifth lens, and making the fourth lens and the fifth lens more stable during assembly.

[0074] In an exemplary embodiment, the inner diameter d02m of the image side end surface of the second lens barrel and the effective focal length F2 of the second lens group may satisfy: 1.5 < d02m / F2 ≤ 1.8. By reasonably configuring the ratio of the inner diameter of the image side end surface of the second lens barrel to the effective focal length of the second lens group, when the effective focal length of the second lens group is fixed, the second lens barrel can be made as small as possible without interfering with the effective light, ensuring miniaturization of the second lens group while improving the imaging quality of the second lens group; it can also make the second lens group have an appropriate effective focal length and improve the zoom feasibility of the second lens group.

[0075] In an exemplary embodiment, the inner diameter d02s of the object side end surface of the second lens barrel, the outer diameter D02m of the image side end surface of the second lens barrel, and the length L2 of the second lens barrel in the direction of the optical axis may satisfy: 1.5 ≤ (D02m - d02s) / L2 < 1.7. By reasonably configuring the ratio of the difference between the outer diameter of the image side end surface and the inner diameter of the object side end surface of the second lens barrel to the length of the second lens barrel in the direction of the optical axis, the axial dimension and the lateral dimension of the second lens group can be constrained within an appropriate range, and the step difference between the object side end dimension and the image side end dimension of the second lens group can be ensured to be appropriate, enabling the second lens barrel to fit better with the second lens group; at the same time, when the lateral space of the second lens group is fixed, the axial length of the optical imaging lens can be better compressed, ensuring miniaturization of the optical imaging lens.

[0076] In an exemplary embodiment, the outer diameter D02m of the image-side end face of the second lens barrel, the inner diameter d03s of the object-side end face of the third lens barrel, and the maximum movable distance ΔEP0 of the second lens barrel in the optical axis direction may satisfy: 2.0 < (d03s - D02m) / ΔEP0 < 3.5. By reasonably configuring the ratio of the difference between the inner diameter of the object-side end face of the third lens barrel and the outer diameter of the image-side end face of the second lens barrel to the maximum movable distance of the second lens barrel in the optical axis direction, the step difference between the object-side end face of the third lens barrel and the image-side end face of the second lens barrel can be constrained within a certain range, enabling the second lens group to be better matched with the seventh lens; at the same time, it can effectively regulate the axial zoom distance of the second lens group, prevent the second lens group from colliding with the first lens group or the third lens group during the zoom process of the optical imaging lens, and ensure that the optical imaging lens has good imaging resolution.

[0077] In an exemplary embodiment, the length L1 of the first lens barrel in the direction of the optical axis, the length L2 of the second lens barrel in the direction of the optical axis, the length L3 of the third lens barrel in the direction of the optical axis, and the maximum movable distance ΔEP0 of the second lens barrel in the optical axis direction may satisfy: 25 < (L1 + L2 + L3) / ΔEP0 ≤ 31. By reasonably configuring the ratio of the sum of the lengths of the first lens barrel, the second lens barrel, and the third lens in the direction of the optical axis to the maximum movable distance of the second lens barrel in the optical axis direction, it is beneficial to regulate the zoom range of the second lens group, and while ensuring that the second lens group has a sufficient zoom range, it can also ensure that the second lens barrel does not collide with the first lens barrel or the third lens barrel.

[0078] The optical imaging lens according to the above embodiment of the present application may employ seven lenses, three lens barrels, and at least one spacer element. By reasonably allocating the parameters of each lens, each lens barrel, and each spacer element, the zoom feasibility of the second lens group can be ensured, and the second lens group can be prevented from colliding with the first lens group and the third lens group during the zoom process of the optical imaging lens. At the same time, the processability, assembly stability, and imaging quality of the optical imaging lens can also be improved.

[0079] 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 continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, the aberration that appears during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, both the object side and the image side of each of the first lens to the seventh lens are aspherical surfaces.

[0080] A second aspect of the present application provides an optical imaging lens, which includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel, a second lens barrel, and a third lens barrel arranged in sequence from the object side to the image plane along the optical axis. The optical lens group includes, in sequence from the object side to the image plane along the optical axis: a first lens group disposed in the first lens barrel, including a first lens having a focal power; a second lens group disposed in the second lens barrel and having a positive focal power, including a second lens having a positive focal power, a third lens having a negative focal power, a fourth lens having a negative focal power, a fifth lens having a focal power, and a sixth lens having a positive focal power; and a third lens group disposed in the third lens barrel, including a seventh lens having a negative focal power. The positions of the first lens group and the third lens group relative to the image plane on the optical axis are fixed, and the distance of the second lens group relative to the first lens group on the optical axis is adjustable. The spacer element group includes a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side surface of the fifth lens and in contact with the image side surface of the fifth lens.

[0081] Wherein, the outer diameter D02m of the image side end surface of the second lens barrel, the inner diameter d03s of the object side end surface of the third lens barrel, and the maximum movable distance ΔEP0 of the second lens barrel in the optical axis direction may satisfy: 2.0 < (d03s - D02m) / ΔEP0 < 3.5. The optical imaging lens provided by the present application includes three lens groups, and the three lens groups are respectively assembled in three lens barrels. By moving the second lens group, zooming of the optical imaging lens can be achieved. Reasonably configuring the ratio of the difference between the inner diameter of the object side end surface of the third lens barrel and the outer diameter of the image side end surface of the second lens barrel to the maximum movable distance of the second lens barrel in the optical axis direction can constrain the step difference between the object side end surface of the third lens barrel and the image side end surface of the second lens barrel within a certain range, so that the second lens group can be better matched with the seventh lens; at the same time, it can also effectively regulate the axial zoom distance of the second lens group, prevent the second lens group from colliding with the first lens group or the third lens group during the zooming process of the optical imaging lens, and ensure that the optical imaging lens has good imaging resolution.

[0082] Those skilled in the art should understand that, without departing from the technical solutions claimed in the present application, the number of lenses and spacer elements constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0083] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings.

[0084] Example 1

[0085] The following refers to Figure 2 and Figure 3 Describe the optical imaging lens according to Embodiment 1 of the present application.

[0086] As Figure 2 and Figure 3 shown, the optical imaging lens includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02, and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane.

[0087] The optical lens group includes, in sequence along the optical axis from the object side to the image plane, a first lens group G1 disposed in the first lens barrel P01, a second lens group G2 disposed in the second lens barrel P02 and having a positive optical power, and a third lens group G3 disposed in the third lens barrel P03 and having a negative optical power. The positions of the first lens group G1 and the third lens group G3 on the optical axis relative to the image plane are fixed. The second lens group G2 is movable relative to the first lens group G1 along the optical axis. When the distance between the object and the optical imaging lens changes from far to near, by adjusting the distance between the second lens group G2 and the first lens group G1 on the optical axis, the optical imaging lens can be switched between the telephoto state and the wide-angle state, thereby realizing the zoom of the optical imaging lens. In the example, the first lens group G1 includes a first lens E1. The second lens group G2 includes, in sequence along the optical axis from the object side to the image plane, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The third lens group G3 includes a seventh lens E7. The second lens group G2 further includes a diaphragm STO, and the diaphragm STO is disposed between the object side and the second lens E2.

[0088] The first lens E1 has a negative optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a negative optical power, its object side S7 is convex, and its image side S8 is concave. The fifth lens E5 has a negative optical power, its object side S9 is convex, and its image side S10 is concave. The sixth lens E6 has a positive optical power, its object side S11 is convex, and its image side S12 is concave. The seventh lens E7 has a negative optical power, its object side S13 is convex, and its image side S14 is concave. A filter E8 is further disposed between the seventh lens E7 and the image plane S17, and the filter E8 has an object side S15 and an image side S16. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the image plane S17.

[0089] The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 disposed in the second lens barrel P02. The spacer elements can block the excess light during the imaging process from entering the next lens, and at the same time enable the lens to better bear against the second lens barrel P02, enhancing the structural stability of the optical imaging lens.

[0090] Table 1 shows the basic parameter table of the optical imaging lens of Example 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0091]

[0092]

[0093] Table 1

[0094] In this embodiment, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. The surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0095]

[0096] where x is the sagitta, the distance from the vertex of the aspherical surface when the aspherical surface is at a position with 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 constant; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 gives the higher-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0097]

[0098]

[0099] Table 2

[0100] In this embodiment, the total effective focal length f of the optical imaging lens is 8.60 mm.

[0101] Table 3 shows the distance U between the object to be photographed and the optical imaging lens, the air gap D1 on the optical axis between the first lens group and the second lens group, and the air gap D2 on the optical axis between the second lens group and the third lens group in Example 1, where the units of U, D1, and D2 are all millimeters (mm). When U is infinity, the optical imaging lens is in the telephoto state; when U is 150 mm, the optical imaging lens is in the wide-angle state.

[0102] Object distance U Infinity 150 D1 1.1643 0.7803 D2 2.1192 2.5032

[0103] Table 3

[0104] Example 2

[0105] Refer to the following Figure 2 and Figure 4 to describe the optical imaging lens according to Embodiment 2 of the present application.

[0106] As Figure 2 and Figure 4 shown, the optical imaging lens includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02, and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 1. The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 disposed in the second lens barrel P02.

[0107] The structure of the optical lens group in this embodiment is the same as that of the optical lens group in Embodiment 1, that is, the basic parameter table of the optical imaging lens in 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 lies in that the structural dimensions of the first lens barrel P01, the second lens barrel P02, the third lens barrel P03, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, and the fifth spacer element P5 are different. For example, parameters such as L1, L2, L3, d02s, d02m, D02m, d03s, d4s, D4m, d5s, D5m, ΔEP0, EP022, EP23, EP34, and EP45 are different.

[0108] Example 3

[0109] Refer to the following Figure 2 and Figure 5 to describe the optical imaging lens according to Embodiment 3 of the present application.

[0110] As Figure 2 and Figure 5 shown, the optical imaging lens includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02, and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 1. The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 disposed in the second lens barrel P02.

[0111] The structure of the optical lens group in this embodiment is the same as that of the optical lens group in Embodiment 1. That is, the basic parameter table of the optical imaging lens in 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 lies in that the structural dimensions of the first lens barrel P01, the second lens barrel P02, the third lens barrel P03, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, and the fifth spacer element P5 are different. For example, parameters such as L1, L2, L3, d02s, d02m, D02m, d03s, d4s, D4m, d5s, D5m, ΔEP0, EP022, EP23, EP34, and EP45 are different.

[0112] Figure 6A The axial chromatic aberration curve in the telephoto state of the optical imaging lens according to Embodiment 1, 2, or 3 is shown, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical imaging lens. Figure 6B The astigmatism curve in the telephoto state of the optical imaging lens according to Embodiment 1, 2, or 3 is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 6C The distortion curve in the telephoto state of the optical imaging lens according to Embodiment 1, 2, or 3 is shown, which represents the distortion magnitude values corresponding to different image heights. According to Figures 6A to 6C It can be known that the optical imaging lens according to Embodiment 1, 2, or 3 can achieve good imaging quality in the telephoto state.

[0113] Figure 7A The axial chromatic aberration curve in the wide-angle state of the optical imaging lens according to Embodiment 1, 2, or 3 is shown, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical imaging lens. Figure 7B The astigmatism curve in the wide-angle state of the optical imaging lens according to Embodiment 1, 2, or 3 is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 7C The distortion curve in the wide-angle state of the optical imaging lens according to Embodiment 1, 2, or 3 is shown, which represents the distortion magnitude values corresponding to different image heights. According to Figures 7A to 7C It can be known that the optical imaging lens according to Embodiment 1, 2, or 3 can achieve good imaging quality in the wide-angle state.

[0114] Example 4

[0115] The following refers to Figure 8 and Figure 9 Describe the optical imaging lens according to Embodiment 4 of the present application.

[0116] As Figure 8 and Figure 9As shown, the optical imaging lens includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02, and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane.

[0117] The optical lens group sequentially includes a first lens group G1 placed in the first lens barrel P01, a second lens group G2 placed in the second lens barrel P02 and having a positive optical power, and a third lens group G3 placed in the third lens barrel P03 and having a negative optical power along the optical axis from the object side to the image plane. The positions of the first lens group G1 and the third lens group G3 on the optical axis relative to the image plane are fixed. The second lens group G2 is movable relative to the first lens group G1 along the optical axis. When the distance between the object and the optical imaging lens changes from far to near, adjusting the distance between the second lens group G2 and the first lens group G1 on the optical axis can enable the optical imaging lens to switch between the telephoto state and the wide-angle state, thereby realizing the zoom of the optical imaging lens. In the example, the first lens group G1 includes a first lens E1. The second lens group G2 sequentially includes a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 along the optical axis from the object side to the image plane. The third lens group G3 includes a seventh lens E7. The second lens group G2 further includes a diaphragm STO, and the diaphragm STO is arranged between the object side and the second lens E2.

[0118] The first lens E1 has a positive optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a negative optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a negative optical power, its object side S7 is convex, and its image side S8 is concave. The fifth lens E5 has a positive optical power, its object side S9 is convex, and its image side S10 is concave. The sixth lens E6 has a positive optical power, its object side S11 is convex, and its image side S12 is concave. The seventh lens E7 has a negative optical power, its object side S13 is concave, and its image side S14 is concave. A filter E8 is further arranged between the seventh lens E7 and the image plane S17, and the filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the image plane S17.

[0119] The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 placed in the second lens barrel P02. The spacer elements can block the excess light during the imaging process from entering the next lens, and at the same time enable the lens to better bear against the second lens barrel P02, enhancing the structural stability of the optical imaging lens.

[0120] Table 4 shows the basic parameter table of the optical imaging lens of Embodiment 4, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0121]

[0122]

[0123] Table 4

[0124] In this embodiment, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 5 gives the higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 .

[0125] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.3894E-03 2.5770E-04 -2.7962E-04 1.2360E-04 -3.4380E-05 5.9784E-06 -6.2702E-07 S2 -3.1466E-03 1.4110E-04 -3.0542E-04 1.7472E-04 -6.1178E-05 1.3151E-05 -1.6823E-06 S3 1.4078E-03 3.2363E-04 -1.4625E-04 8.4555E-06 3.1109E-05 -1.5460E-05 3.3611E-06 S4 -8.0620E-03 8.7931E-03 -5.1845E-03 1.8686E-03 -4.0139E-04 4.7446E-05 -2.3476E-06 S5 -1.2737E-02 8.4356E-03 -3.8145E-03 5.2969E-04 4.3412E-04 -2.9171E-04 8.6624E-05 S6 -5.6327E-03 1.8047E-03 -7.2409E-04 7.1930E-04 -6.3275E-04 3.4199E-04 -1.0899E-04 S7 -8.0574E-03 4.6609E-03 -4.0876E-03 1.5839E-03 -2.3961E-04 -5.8929E-05 3.7471E-05 S8 -3.3362E-02 3.7358E-02 -3.3861E-02 2.2887E-02 -1.1520E-02 4.2473E-03 -1.1336E-03 S9 -5.0353E-02 3.5606E-02 -2.1852E-02 1.0316E-02 -3.4700E-03 7.8198E-04 -1.0782E-04 S10 -3.2334E-02 7.5806E-03 -7.2345E-04 -8.1169E-04 5.7483E-04 -1.9904E-04 4.2865E-05 S11 -1.2303E-02 1.7956E-03 -2.5083E-04 -1.5587E-05 2.3656E-05 -8.2464E-06 1.7169E-06 S12 1.2176E-03 1.8867E-04 -3.3373E-04 1.4744E-04 -3.9134E-05 6.8789E-06 -8.4172E-07 S13 -2.5607E-02 3.4503E-03 -3.9473E-04 4.1465E-05 -3.2824E-06 1.8294E-07 -7.2284E-09 S14 -2.4749E-02 3.8449E-03 -5.3926E-04 6.3117E-05 -5.9676E-06 4.4043E-07 -2.4698E-08 Face number A18 A20 A22 A24 A26 A28 A30 S1 3.6184E-08 -8.8110E-10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.1726E-07 -3.4236E-09 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -3.5563E-07 1.5271E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -1.4544E-05 1.3503E-06 -5.4724E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 2.0171E-05 -1.9947E-06 8.0661E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -8.3279E-06 9.3182E-07 -4.3505E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.1559E-04 -2.8383E-05 2.4503E-06 -1.2442E-07 2.8092E-09 0.0000E+00 0.0000E+00 S9 6.9485E-06 2.2692E-07 -7.5006E-08 5.0885E-09 -1.2175E-10 0.0000E+00 0.0000E+00 S10 -6.0022E-06 5.4515E-07 -3.0962E-08 9.9957E-10 -1.4011E-11 0.0000E+00 0.0000E+00 S11 -2.3864E-07 2.2835E-08 -1.5077E-09 6.7386E-11 -1.9443E-12 3.2650E-14 -2.4219E-16 S12 7.3355E-08 -4.5787E-09 2.0302E-10 -6.2383E-12 1.2624E-13 -1.5123E-15 8.1227E-18 S13 2.0912E-10 -4.6767E-12 8.6597E-14 -1.3588E-15 1.6548E-17 -1.2989E-19 4.6913E-22 S14 1.0330E-09 -3.1725E-11 7.0154E-13 -1.0829E-14 1.1048E-16 -6.6817E-19 1.8121E-21

[0126] Table 5

[0127] In this embodiment, the total effective focal length f of the optical imaging lens is 8.35 mm.

[0128] Table 6 shows the distance U between the object and the optical imaging lens, the air gap D1 on the optical axis between the first lens group and the second lens group, and the air gap D2 on the optical axis between the second lens group and the third lens group in Embodiment 4, where the units of U, D1, and D2 are all millimeters (mm). When U is infinity, the optical imaging lens is in the telephoto state; when U is 150 mm, the optical imaging lens is in the wide-angle state.

[0129] Object distance U Infinity 150 D1 0.9464 0.6276 D2 1.8073 2.1261

[0130] Table 6

[0131] Example 5

[0132] The following refers to Figure 8 and Figure 10 to describe the optical imaging lens according to Embodiment 5 of the present application.

[0133] As Figure 8 and Figure 10As shown in the figure, the optical imaging lens includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02, and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 4. The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 disposed in the second lens barrel P02.

[0134] The structure of the optical lens group in this embodiment is the same as that of the optical lens group in Embodiment 4, that is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 4, and the aspheric coefficient table is the same as Table 5. The difference between this embodiment and Embodiment 4 lies in that the structural dimensions of the first lens barrel P01, the second lens barrel P02, the third lens barrel P03, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, and the fifth spacer element P5 are different. For example, parameters such as L1, L2, L3, d02s, d02m, D02m, d03s, d4s, D4m, d5s, D5m, ΔEP0, EP022, EP23, EP34, and EP45 are different.

[0135] Example 6

[0136] The following refers to Figure 8 and Figure 11 describe the optical imaging lens according to Embodiment 6 of the present application.

[0137] As Figure 8 and Figure 11 shown in the figure, the optical imaging lens includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02, and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 4. The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 disposed in the second lens barrel P02.

[0138] The structure of the optical lens group in this embodiment is the same as that of the optical lens group in Embodiment 4, that is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 4, and the aspheric coefficient table is the same as Table 5. The difference between this embodiment and Embodiment 4 lies in that the structural dimensions of the first lens barrel P01, the second lens barrel P02, the third lens barrel P03, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, and the fifth spacer element P5 are different. For example, parameters such as L1, L2, L3, d02s, d02m, D02m, d03s, d4s, D4m, d5s, D5m, ΔEP0, EP022, EP23, EP34, and EP45 are different.

[0139] Figure 12A Shows the axial chromatic aberration curve of the telephoto state of the optical imaging lens according to Embodiment 4, 5 or 6, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the optical imaging lens. Figure 12B Shows the astigmatism curve of the telephoto state of the optical imaging lens according to Embodiment 4, 5 or 6, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 12C Shows the distortion curve of the telephoto state of the optical imaging lens according to Embodiment 4, 5 or 6, which represents the distortion magnitude values corresponding to different image heights. According to Figures 12A to 12C It can be seen that the optical imaging lens according to Embodiment 4, 5 or 6 can achieve good imaging quality in the telephoto state.

[0140] Figure 13A Shows the axial chromatic aberration curve of the wide-angle state of the optical imaging lens according to Embodiment 4, 5 or 6, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the optical imaging lens. Figure 13B Shows the astigmatism curve of the wide-angle state of the optical imaging lens according to Embodiment 4, 5 or 6, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 13C Shows the distortion curve of the wide-angle state of the optical imaging lens according to Embodiment 4, 5 or 6, which represents the distortion magnitude values corresponding to different image heights. According to Figures 13A to 13C It can be seen that the optical imaging lens according to Embodiment 4, 5 or 6 can achieve good imaging quality in the wide-angle state.

[0141] Example 7

[0142] The following refers to Figure 14 and Figure 15 Describe the optical imaging lens according to Embodiment 7 of the present application.

[0143] As Figure 14 and Figure 15 shown, the optical imaging lens includes a lens barrel assembly, an optical lens group and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02 and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane.

[0144] The optical lens group sequentially includes, along the optical axis from the object side to the image plane, a first lens group G1 placed in the first lens barrel P01, a second lens group G2 placed in the second lens barrel P02 and having a positive optical power, and a third lens group G3 placed in the third lens barrel P03 and having a negative optical power. The positions of the first lens group G1 and the third lens group G3 on the optical axis relative to the image plane are fixed. The second lens group G2 is movable relative to the first lens group G1 along the optical axis. When the distance between the object and the optical imaging lens changes from far to near, by adjusting the distance between the second lens group G2 and the first lens group G1 on the optical axis, the optical imaging lens can be switched between the telephoto state and the wide-angle state, thereby realizing the zoom of the optical imaging lens. In the example, the first lens group G1 includes a first lens E1. The second lens group G2 sequentially includes, along the optical axis from the object side to the image plane, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The third lens group G3 includes a seventh lens E7. The second lens group G2 further includes a diaphragm STO, and the diaphragm STO is disposed between the object side and the second lens E2.

[0145] The first lens E1 has a negative optical power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has a positive optical power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has a negative optical power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a negative optical power, its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has a positive optical power, its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has a positive optical power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a negative optical power, its object side surface S13 is concave, and its image side surface S14 is concave. A filter E8 is further disposed between the seventh lens E7 and the image plane S17, and the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the image plane S17.

[0146] The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 placed in the second lens barrel P02. The spacer elements can block the redundant light during the imaging process from entering the next lens, and at the same time enable the lens to better bear against the second lens barrel P02, enhancing the structural stability of the optical imaging lens.

[0147] Table 7 shows the basic parameter table of the optical imaging lens of Example 7, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0148]

[0149]

[0150] Table 7

[0151] In this embodiment, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 8 gives the higher-order term coefficients A4, A6, A8, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0152] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.0986E-03 -9.0180E-05 -1.1792E-04 7.5334E-05 -2.4660E-05 4.7946E-06 -5.4591E-07 S2 -3.7852E-03 -4.3857E-04 4.2444E-05 3.3296E-05 -2.2239E-05 6.3559E-06 -9.5880E-07 S3 1.8893E-03 -5.1684E-04 6.7108E-04 -5.2534E-04 2.5716E-04 -7.7492E-05 1.4007E-05 S4 3.6666E-04 2.2809E-03 -1.7677E-03 6.3751E-04 -5.8578E-05 -3.4479E-05 1.3175E-05 S5 -8.2280E-03 3.9690E-03 -2.1735E-03 7.2219E-04 -3.8114E-05 -5.7595E-05 2.1334E-05 S6 -7.9911E-03 1.6536E-03 5.4285E-04 -1.0434E-03 7.1415E-04 -2.7036E-04 6.0510E-05 S7 -4.9712E-03 -2.5460E-04 3.1231E-04 -1.4224E-03 1.2674E-03 -5.7289E-04 1.5147E-04 S8 -1.3004E-02 1.0000E-02 -8.7937E-03 5.7028E-03 -2.8528E-03 1.0651E-03 -2.8688E-04 S9 -2.6751E-02 1.3212E-02 -7.0085E-03 3.3391E-03 -1.3027E-03 3.8050E-04 -7.8128E-05 S10 -2.6589E-02 4.6863E-03 -5.9693E-04 -7.7625E-05 6.6452E-05 -1.5674E-05 1.4254E-06 S11 -6.3259E-03 -8.6966E-04 6.9024E-04 -2.7015E-04 7.0860E-05 -1.3620E-05 1.9615E-06 S12 6.0551E-03 -1.7197E-03 3.9849E-04 -7.2914E-05 7.5017E-06 -1.3037E-07 -7.6113E-08 S13 -1.9447E-02 8.5058E-04 2.8221E-04 -7.2245E-05 9.3428E-06 -7.8541E-07 4.5895E-08 S14 -1.8141E-02 1.3584E-03 5.3999E-06 -1.6172E-05 2.1801E-06 -1.6649E-07 8.4782E-09 Face number A18 A20 A22 A24 A26 A28 A30 S1 3.3528E-08 -8.5663E-10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 7.4261E-08 -2.3275E-09 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.3887E-06 5.8085E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.8489E-06 9.5950E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -3.3433E-06 2.3834E-07 -5.7504E-09 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -7.7492E-06 5.0440E-07 -1.1979E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -2.3795E-05 2.0739E-06 -7.7616E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 5.4438E-05 -7.0678E-06 5.9599E-07 -2.9342E-08 6.3876E-10 0.0000E+00 0.0000E+00 S9 1.0998E-05 -1.0431E-06 6.4210E-08 -2.3391E-09 3.8632E-11 0.0000E+00 0.0000E+00 S10 1.2196E-07 -4.5546E-08 4.8586E-09 -2.4047E-10 4.6907E-12 0.0000E+00 0.0000E+00 S11 -2.1132E-07 1.6807E-08 -9.6521E-10 3.8681E-11 -1.0214E-12 1.5916E-14 -1.1061E-16 S12 1.1907E-08 -9.6131E-10 4.8975E-11 -1.6298E-12 3.4506E-14 -4.2295E-16 2.2866E-18 S13 -1.9176E-09 5.7824E-11 -1.2506E-12 1.8942E-14 -1.9089E-16 1.1502E-18 -3.1359E-21 S14 -3.0246E-10 7.6725E-12 -1.3779E-13 1.7122E-15 -1.4002E-17 6.7835E-20 -1.4767E-22

[0153] Table 8

[0154] In this embodiment, the total effective focal length f of the optical imaging lens is 8.52 mm.

[0155] Table 9 shows the distance U between the object to be photographed and the optical imaging lens, the air gap D1 on the optical axis between the first lens group and the second lens group, and the air gap D2 on the optical axis between the second lens group and the third lens group in Embodiment 7. Here, the units of U, D1, and D2 are all millimeters (mm). When U is infinity, the optical imaging lens is in the telephoto state; when U is 150 mm, the optical imaging lens is in the wide-angle state.

[0156]

[0157]

[0158] Table 9

[0159] Example 8

[0160] The following refers to Figure 14 and Figure 16 to describe the optical imaging lens according to Embodiment 8 of the present application.

[0161] As Figure 14 and Figure 16As shown, the optical imaging lens includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02, and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 7. The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 disposed in the second lens barrel P02.

[0162] The structure of the optical lens group in this embodiment is the same as that of the optical lens group in Embodiment 7, that is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 7, and the aspherical coefficient table is the same as Table 8. The difference between this embodiment and Embodiment 7 lies in that the structural dimensions of the first lens barrel P01, the second lens barrel P02, the third lens barrel P03, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, and the fifth spacer element P5 are different. For example, parameters such as L1, L2, L3, d02s, d02m, D02m, d03s, d4s, D4m, d5s, D5m, ΔEP0, EP022, EP23, EP34, and EP45 are different.

[0163] Example 9

[0164] The following refers to Figure 14 and Figure 17 describe the optical imaging lens according to Embodiment 9 of the present application.

[0165] As Figure 14 and Figure 17 shown, the optical imaging lens includes a lens barrel assembly, an optical lens group, and a spacer element group. The lens barrel assembly includes a first lens barrel P01, a second lens barrel P02, and a third lens barrel P03 arranged in sequence along the optical axis from the object side to the image plane. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 7. The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5 disposed in the second lens barrel P02.

[0166] The structure of the optical lens group in this embodiment is the same as that of the optical lens group in Embodiment 7, that is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 7, and the aspherical coefficient table is the same as Table 8. The difference between this embodiment and Embodiment 7 lies in that the structural dimensions of the first lens barrel P01, the second lens barrel P02, the third lens barrel P03, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, and the fifth spacer element P5 are different. For example, parameters such as L1, L2, L3, d02s, d02m, D02m, d03s, d4s, D4m, d5s, D5m, ΔEP0, EP022, EP23, EP34, and EP45 are different.

[0167] Figure 18A Shows the axial chromatic aberration curve of the long focal length state of the optical imaging lens of Embodiment 7, 8 or 9, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the optical imaging lens. Figure 18B Shows the astigmatism curve of the long focal length state of the optical imaging lens of Embodiment 7, 8 or 9, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 18C Shows the distortion curve of the long focal length state of the optical imaging lens of Embodiment 7, 8 or 9, which represents the distortion magnitude values corresponding to different image heights. According to Figures 18A to 18C It can be seen that the optical imaging lens of Embodiment 7, 8 or 9 can achieve good imaging quality in the long focal length state.

[0168] Figure 19A Shows the axial chromatic aberration curve of the short focal length state of the optical imaging lens of Embodiment 7, 8 or 9, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the optical imaging lens. Figure 19B Shows the astigmatism curve of the short focal length state of the optical imaging lens of Embodiment 7, 8 or 9, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 19C Shows the distortion curve of the short focal length state of the optical imaging lens of Embodiment 7, 8 or 9, which represents the distortion magnitude values corresponding to different image heights. According to Figures 19A to 19C It can be seen that the optical imaging lens of Embodiment 7, 8 or 9 can achieve good imaging quality in the short focal length state.

[0169] Table 10 shows the values of parameters such as L1, L2, L3, d02s, d02m, D02m, d03s, d4s, D4m, d5s, D5m, ΔEP0, EP022, EP23, EP34, EP45 and F2 of each embodiment in Embodiments 1 - 9. Among them, some of the above parameters can be measured according to Figure 1 the marking method shown, and the units of the parameters listed in Table 10 are all mm.

[0170] Parameter / Example 1 2 3 4 5 6 7 8 9 d02s 5.0177 5.0177 5.0177 4.7738 4.7738 4.7738 4.5916 4.5916 4.5916 d02m 12.1234 12.1234 12.1234 11.9234 11.9234 11.9234 11.6234 11.6234 11.6234 D02m 12.96 12.96 12.96 12.7313 12.7313 12.7313 12.4313 12.4313 12.4313 d03s 14.0183 14.0183 14.0183 13.5183 13.5183 13.5183 13.5183 13.5183 13.5183 d4s 5.1176 5.3916 6.2597 5.3544 5.4687 5.4687 5.4372 5.4372 5.5424 D4m 8.1 8.3 9.1669 7.9114 8.1673 8.6941 7.9114 6.6573 8.336 d5s 7.9478 7.9478 8.6392 6.9026 7.1585 8.1322 6.9394 7.4003 8.3252 D5m 10.8244 11.1317 11.5376 10.8244 10.6123 11.1376 10.7268 10.7268 10.7508 EP022 1.1404 1.1156 1.2033 1.0838 1.0264 1.0892 1.1552 1.1145 1.152 EP23 0.7281 0.7786 0.8129 0.7281 0.8034 0.8021 0.7322 0.8404 0.7529 EP34 0.7197 0.794 0.9872 0.8424 0.8506 0.7892 0.8632 0.7957 0.8764 EP45 1.1035 1.0035 1.1427 0.6277 0.6476 1.2046 0.493 0.6165 1.1692 L1 1.0311 1.0311 1.0311 1.1301 1.1301 1.1301 1.0226 1.0226 1.0226 L2 5.2896 5.2896 5.2896 4.8595 4.8595 4.8595 4.8595 4.8595 4.8595 L3 3.672 3.672 3.672 3.7325 3.7325 3.7325 3.8832 3.8832 3.8832 ΔEP0 0.384 0.384 0.384 0.3188 0.3188 0.3188 0.3288 0.3288 0.3288 F2 7.0303 7.0303 7.0303 7.0598 7.0598 7.0598 6.9146 6.9146 6.9146

[0171] Table 10

[0172] Table 11 shows the values of the conditional expressions of each embodiment in Embodiments 1 - 9.

[0173] Condition / Example 1 2 3 4 5 6 7 8 9 f45 / F2 -4.96 -4.96 -4.96 -7.50 -7.50 -7.50 -4.79 -4.79 -4.79 (CT5 + T56) / EP45 1.20 1.32 1.16 2.86 2.78 1.49 3.30 2.64 1.39 EP34 / (CT4 + T45) 0.62 0.69 0.85 1.31 1.32 1.22 1.27 1.17 1.29 d4s / (N4 × CT4) 6.35 6.69 7.77 6.52 6.66 6.66 6.25 6.25 6.37 d5s / (N5 × CT5) 6.39 6.39 6.95 4.47 4.64 5.27 5.13 5.47 6.16 f23 / F2 1.38 1.38 1.38 1.56 1.56 1.56 1.45 1.45 1.45 (T34 - EP23) / CT3 0.53 0.40 0.31 0.63 0.43 0.44 1.32 1.00 1.26 (f2 / N2) / EP022 3.98 4.07 3.77 4.68 4.94 4.65 4.17 4.33 4.18 CT2 / (EP022 - T23) 1.24 1.27 1.17 1.09 1.15 1.08 1.05 1.09 1.05 f6 / (D5m - d5s) 3.52 3.18 3.50 2.44 2.77 3.19 2.33 2.65 3.64 f45 / (D4m - d4s) -11.69 -11.99 -11.99 -20.70 -19.61 -16.41 -13.39 -27.16 -11.86 d02m / F2 1.72 1.72 1.72 1.69 1.69 1.69 1.68 1.68 1.68 (D02m - d02s) / L2 1.50 1.50 1.50 1.64 1.64 1.64 1.61 1.61 1.61 (d03s - D02m) / ΔEP0 2.76 2.76 2.76 2.47 2.47 2.47 3.31 3.31 3.31 (L1 + L2 + L3) / ΔEP0 26.02 26.02 26.02 30.50 30.50 30.50 29.70 29.70 29.70

[0174] Table 11

[0175] The present application also provides an imaging device, the electronic photosensitive element of which may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The imaging device may 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.

[0176] The above description is only a preferred embodiment of the present application and an explanation of the technical principles applied. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and 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 technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that: The invention comprises a lens barrel assembly, an optical lens group and a spacer element group, wherein the lens barrel assembly comprises a first lens barrel, a second lens barrel and a third lens barrel which are arranged in sequence from the object side to the image plane along the optical axis; wherein, The optical lens group includes, in sequence from the object side to the image plane along the optical axis: A first lens group disposed in the first lens barrel includes a first lens having optical power; a second lens group disposed in the second lens barrel and having positive power, comprising a second lens having positive power, a third lens having negative power, a fourth lens having negative power, a fifth lens having power, and a sixth lens having positive power; and A third lens group disposed in the third lens barrel includes a seventh lens having negative optical power; The positions of the first lens group and the third lens group on the optical axis relative to the image plane are fixed, and the distance of the second lens group on the optical axis relative to the first lens group is adjustable; The optical imaging lens has seven lenses with optical power; The spacer element group includes a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side surface of the fifth lens and in contact with the image side surface of the fifth lens; The effective focal length F2 of the second lens group and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -7.50≤f45 / F2≤-4.79; The center thickness CT5 of the fifth lens on the optical axis, the air interval T56 between the fifth lens and the sixth lens on the optical axis, and the interval EP45 between the fourth spacing element and the fifth spacing element along the optical axis satisfy: 1.16≤(CT5+T56) / EP45≤3.

30.

2. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a third spacer element disposed on the image side surface of the third lens and in contact with the image side surface of the third lens. The center thickness CT4 of the fourth lens on the optical axis, the air interval T45 between the fourth lens and the fifth lens on the optical axis, and the interval EP34 between the third spacing element and the fourth spacing element along the optical axis satisfy: 0.62≤EP34 / (CT4+T45)≤1.

32.

3. The optical imaging lens according to claim 1, wherein: An inner diameter d4s of the object side surface of the fourth spacer element, a center thickness CT4 of the fourth lens on the optical axis and a refractive index N4 of the fourth lens satisfy: 6.25≤d4s / (N4×CT4)≤7.

77.

4. The optical imaging lens according to claim 1, wherein: An inner diameter d5s of the object side surface of the fifth spacer element, a center thickness CT5 of the fifth lens on the optical axis and a refractive index N5 of the fifth lens satisfy: 4.47≤d5s / (N5×CT5)≤6.

95.

5. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a second spacer element disposed on the image side surface of the second lens and in contact with the image side surface of the second lens, and a third spacer element disposed on the image side surface of the third lens and in contact with the image side surface of the third lens. Among them, the effective focal length F2 of the second lens group and the combined focal length f23 of the second lens and the third lens satisfy: 1.38≤f23 / F2<1.6; the center thickness CT3 of the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis and the gap EP23 between the second spacing element and the third spacing element along the optical axis satisfy: 0.3<(T34-EP23) / CT3≤1.

32.

6. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a second spacer element disposed on the image side surface of the second lens and in contact with the image side surface of the second lens, The effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the interval EP022 between the object side end surface of the second lens barrel and the second spacing element along the optical axis satisfy: 3.77≤(f2 / N2) / EP022≤4.

94.

7. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a second spacer element disposed on the image side surface of the second lens and in contact with the image side surface of the second lens, Among them, the center thickness CT2 of the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the gap EP022 between the object side end surface of the second lens barrel and the second spacing element along the optical axis satisfy: 1.05≤CT2 / (EP022-T23)<1.

3.

8. The optical imaging lens according to any one of claims 1 to 7, characterized in that: The effective focal length f6 of the sixth lens, the inner diameter d5s of the object side surface of the fifth spacing element, and the outer diameter D5m of the image side surface of the fifth spacing element satisfy: 2.33≤f6 / (D5m-d5s)≤3.

64.

9. The optical imaging lens according to any one of claims 1 to 7, characterized in that: The combined focal length f45 of the fourth lens and the fifth lens, the inner diameter d4s of the object side surface of the fourth spacing element, and the outer diameter D4m of the image side surface of the fourth spacing element satisfy: -27.16≤f45 / (D4m-d4s)≤-11.

69.

10. The optical imaging lens according to any one of claims 1 to 7, characterized in that: An inner diameter d02m of the image side end surface of the second lens barrel and an effective focal length F2 of the second lens group satisfy the following: 1.68≤d02m / F2≤1.

72.

11. The optical imaging lens according to any one of claims 1 to 7, characterized in that: The inner diameter d02s of the object side end surface of the second lens barrel, the outer diameter D02m of the image side end surface of the second lens barrel and the length L2 of the second lens barrel along the direction of the optical axis satisfy: 1.50≤(D02m-d02s) / L2≤1.

64.

12. The optical imaging lens according to any one of claims 1 to 7, characterized in that: The outer diameter D02m of the image side end surface of the second lens barrel, the inner diameter d03s of the object side end surface of the third lens barrel and the maximum movable distance of the second lens barrel along the optical axis direction EP0 satisfies: 2.47≤(d03s-D02m) / EP0≤3.

31.

13. The optical imaging lens according to any one of claims 1 to 7, characterized in that: The length L1 of the first lens barrel along the direction of the optical axis, the length L2 of the second lens barrel along the direction of the optical axis, the length L3 of the third lens barrel along the direction of the optical axis and the maximum movable distance of the second lens barrel along the direction of the optical axis EP0 satisfies: 26.02≤(L1+L2+L3) / EP0≤30.50.

Images