Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a first lens barrel, a second lens barrel, a first lens group, a second lens group and a plurality of spacers, wherein the first lens group sequentially comprises a first lens, a second lens and a third lens with positive focal power from an object side to an image side; the second lens group sequentially comprises a fourth lens and a fifth lens which have negative focal power from the object side to the image side, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the plurality of distance pieces at least comprise a first distance piece, a second distance piece and a fourth distance piece, and the inner diameter of the fourth distance piece is the smallest; when the following conditions are satisfied:-0.8 lt; d4s / F2lt; when 0, 0.1 lt is satisfied; ePB4 / LB-R7 / R8lt; and 0.5. The optical imaging lens solves the problem that stray light of an optical imaging lens in the prior art is difficult to improve.

Description

Technical Field

[0001] The utility model relates to the technical field of optical imaging devices, and more particularly to an optical imaging lens. Background Art

[0002] With the increasing demand of consumers for mobile phone photography, it is required that the optical imaging lens of the mobile phone can take pictures farther and clearer. At the same time, considering the length and volume of the optical imaging lens, a periscope telephoto lens needs to be designed to meet the requirements. The periscope lens usually uses a combination of multiple lenses to compensate for aberrations with each other to improve the imaging quality, and an internal focusing and grouping design is adopted to meet the shooting of objects at macro and infinity. At present, due to the large number of internal components in the optical imaging lens, stray light is easily generated by the reflection of light between the components, thus affecting the final imaging quality. Currently, a light-shielding element is usually added to the lens to intercept the stray light. Although this can intercept part of the stray light, the stray light of the light-shielding element itself cannot be avoided, and it is difficult to improve the stray light.

[0003] That is to say, there is a problem of difficult improvement of stray light in the optical imaging lens in the prior art. Summary of the Utility Model

[0004] The main object of the present utility model is to provide an optical imaging lens to solve the problem of difficult improvement of stray light in the optical imaging lens in the prior art.

[0005] To achieve the above object, according to one aspect of the present utility model, there is provided an optical imaging lens, including a first lens barrel, a second lens barrel, a first lens group, a second lens group and a plurality of spacers. The first lens group is disposed in the first lens barrel, and the first lens group sequentially includes a first lens, a second lens and a third lens with positive optical power from the object side to the image side; the second lens group is disposed in the second lens barrel, and the second lens group sequentially includes a fourth lens with negative optical power and a fifth lens from the object side to the image side, the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex; the plurality of spacers at least includes a first spacer, a second spacer and a fourth spacer. Among them, the inner diameter of the fourth spacer is the smallest, the first spacer is located on the image side of the first lens and partially abuts against the image side surface of the first lens, the second spacer is located on the image side of the second lens and partially abuts against the image side surface of the second lens, and the fourth spacer is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens; when the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the axial distance EPB4 from the object side end face of the second lens barrel to the object side surface of the fourth spacer, the maximum axial height LB of the second lens barrel, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy: 0.1 < EPB4 / LB - R7 / R8 < 0.5.

[0006] According to another aspect of the present utility model, an optical imaging lens is further provided. The optical imaging lens includes a first lens barrel, a second lens barrel, a first lens group, a second lens group, and a plurality of spacers. The first lens group is disposed in the first lens barrel. The first lens group sequentially includes a first lens, a second lens, and a third lens with a positive optical power from the object side to the image side. The second lens group is disposed in the second lens barrel. The second lens group sequentially includes a fourth lens with a negative optical power and a fifth lens from the object side to the image side. The object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The plurality of spacers at least includes a first spacer, a second spacer, and a fourth spacer. Among them, the inner diameter of the fourth spacer is the smallest. The first spacer is located on the image side of the first lens and partially abuts against the image side surface of the first lens. The second spacer is located on the image side of the second lens and partially abuts against the image side surface of the second lens. The fourth spacer is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. When the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the maximum axial height LA of the first lens barrel, the maximum axial height LB of the second lens barrel, the effective focal length F1 of the first lens group, and the effective focal length F2 of the second lens group satisfy: -0.2 < (LA - LB) / (F1 - F2) < 0.3.

[0007] According to another aspect of the present utility model, an optical imaging lens is further provided. The optical imaging lens includes a first lens barrel, a second lens barrel, a first lens group, a second lens group, and a plurality of spacers. The first lens group is disposed in the first lens barrel. The first lens group sequentially includes a first lens, a second lens, and a third lens with a positive optical power from the object side to the image side. The second lens group is disposed in the second lens barrel. The second lens group sequentially includes a fourth lens with a negative optical power and a fifth lens from the object side to the image side. The object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The plurality of spacers at least includes a first spacer, a second spacer, and a fourth spacer. Among them, the inner diameter of the fourth spacer is the smallest. The first spacer is located on the image side of the first lens and partially abuts against the image side surface of the first lens. The second spacer is located on the image side of the second lens and partially abuts against the image side surface of the second lens. The fourth spacer is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. The effective focal length f5 of the fifth lens, the Abbe number V5 of the fifth lens, and the image side outer diameter D4m of the fourth spacer satisfy: -0.1 < f5 / V5 / D4m < 0.3.

[0008] Further, the effective focal length f5 of the fifth lens, the Abbe number V5 of the fifth lens, and the image side outer diameter D4m of the fourth spacer satisfy: -0.1 < f5 / V5 / D4m < 0.3.

[0009] Further, the maximum axial height LA ​​of the first lens barrel, the maximum axial height LB of the second lens barrel, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy: -0.2<(LA-LB) / (F1-F2)<0.3.

[0010] Furthermore, the inner diameter d1m of the image side surface of the first spacer, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: <d1m / f1-d1m / f2<2。

[0011] Furthermore, an inner diameter d2m of the image side surface of the second spacer, an outer diameter D2m of the image side surface of the second spacer, a curvature radius R4 of the image side surface of the second lens and a curvature radius R5 of the object side surface of the third lens satisfy: -4<(D2m-d2m) / (R4+R5)<0.5.

[0012] Furthermore, the effective focal length f4 of the fourth lens, the on-axis distance EPB4 from the object-side end surface of the second lens barrel to the object-side surface of the fourth spacer, and the refractive index N4 of the fourth lens satisfy: -20 <f4 / EPB4 / N4<0。

[0013] Further, the plurality of spacers further include a first auxiliary spacer, the first auxiliary spacer is located between the first spacer and the second lens, the object side surface of the first auxiliary spacer is partially supported by the first spacer, and the inner diameter D1bm of the image side surface of the first auxiliary spacer, the inner diameter D1bs of the object side surface of the first auxiliary spacer, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R2 of the image side surface of the first lens satisfy: -3 <D1bm / R3+D1bs / R2<5。

[0014] Further, the plurality of spacers also include a first auxiliary spacer, a second auxiliary spacer and a fourth auxiliary spacer, the first auxiliary spacer is located between the first spacer and the second lens, the object side surface of the first auxiliary spacer is partially supported by the first spacer, the second auxiliary spacer is located between the second spacer and the third lens and the object side surface of the second auxiliary spacer is partially supported by the second spacer, the fourth auxiliary spacer is located between the fourth spacer and the fifth lens and the object side surface of the fourth auxiliary spacer is partially supported by the fourth spacer, and the thickness CP1b of the first auxiliary spacer, the thickness CP2b of the second auxiliary spacer, the thickness CP4b of the fourth auxiliary spacer, the air gap T12 between the first lens and the second lens, the air gap T23 between the second lens and the third lens, and the air gap T45 between the fourth lens and the fifth lens satisfy: 0.3<(CP1b+CP2b+CP4b) / (T12+T23+T45)<2.

[0015] Furthermore, the plurality of spacers also include a first auxiliary spacer, a second auxiliary spacer and a fourth auxiliary spacer, the first auxiliary spacer is located between the first spacer and the second lens, the object side surface of the first auxiliary spacer partially bears against the first spacer, the second auxiliary spacer is located between the second spacer and the third lens and the object side surface of the second auxiliary spacer partially bears against the second spacer, the fourth auxiliary spacer is located between the fourth spacer and the fifth lens and the object side surface of the fourth auxiliary spacer partially bears against the fourth spacer, the thickness CP1 of the first spacer and the thickness CP1b of the first auxiliary spacer satisfy the condition: CP1b>CP1; the thickness CP2 of the second spacer and the thickness CP2b of the second auxiliary spacer satisfy the condition: CP2b>CP2; the thickness CP4 of the fourth spacer and the thickness CP4b of the fourth auxiliary spacer satisfy the condition: CP4b>CP4.

[0016] Furthermore, the sum of the thicknesses of the plurality of spacers ∑CP and the effective focal length f of the optical imaging lens satisfy the following relationship: <f / ∑CP<12。

[0017] Furthermore, the object side inner diameter dAs of the first lens barrel, the object side inner diameter dBs of the second lens barrel, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy the following relationship: 1.5 <dAs / F1-dBs / F2<2。

[0018] Further, the effective focal length f3 of the third lens, the axial distance EP24 from the image side surface of the second spacer to the object side surface of the fourth spacer, and the axial distance EPB4 from the object side end surface of the second lens barrel to the object side surface of the fourth spacer satisfy: <f3 / (EP24-EPB4)<30。

[0019] Furthermore, the image side surface of the fifth lens is glued to the inner wall surface of the second lens barrel.

[0020] Furthermore, the air space between the third lens and the fourth lens is adjustable, and the focusing of the optical imaging lens is achieved by adjusting the air space between the third lens and the fourth lens.

[0021] Applying the technical solution of the present utility model, the optical imaging lens includes a first lens barrel, a second lens barrel, a first lens group, a second lens group and a plurality of spacers. The first lens group is disposed in the first lens barrel. The first lens group sequentially includes a first lens, a second lens and a third lens with positive optical power from the object side to the image side. The second lens group is disposed in the second lens barrel. The second lens group sequentially includes a fourth lens with negative optical power and a fifth lens from the object side to the image side. The object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The plurality of spacers at least include a first spacer, a second spacer and a fourth spacer. Among them, the inner diameter of the fourth spacer is the smallest. The first spacer is located on the image side of the first lens and partially abuts against the image side surface of the first lens. The second spacer is located on the image side of the second lens and partially abuts against the image side surface of the second lens. The fourth spacer is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. When the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the axial distance EPB4 from the object side end face of the second lens barrel to the object side surface of the fourth spacer, the maximum axial height LB of the second lens barrel, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy: 0.1 < EPB4 / LB - R7 / R8 < 0.5.

[0022] The optical imaging lens of this application is composed of a first lens barrel and a first lens group disposed therein, a second lens barrel and a second lens group disposed therein, and a plurality of spacers. The first lens group is composed of three lenses, and the second lens group is composed of two lenses. When it is constrained that the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the object side inner diameter of the fourth spacer is relatively small, resulting in tail-end stray light, which is not conducive to the improvement of stray light in the optical imaging lens. Therefore, by constraining 0.1 < EPB4 / LB - R7 / R8 < 0.5 in this application, the phenomenon of stray light can be effectively improved, and some stray light can be avoided through the compression of dimensions and the light-shielding effect of the spacers. The limitation of the maximum axial height of the second lens barrel can avoid tail-end stray light. The energy of this type of stray light is relatively strong and difficult to improve. By controlling the curvature radius of the fourth lens and the effective focal length of the second lens group, the divergence degree of light refraction can be improved, which is conducive to improving and avoiding the complex stray light generated by internal reflection in the mechanism diameter. The inner diameter size of the spacer is conducive to blocking the generated stray light. The limitation of EPB4 makes the structural space more compact, further avoiding the generation of stray light and ensuring that the spacer can effectively play the role of blocking light. Brief Description of the Drawings

[0023] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0024] Figure 1 A dimension diagram of an optical imaging lens of an optional embodiment of the utility model is shown;

[0025] Figure 2 Another dimensionally labeled diagram of an optical imaging lens of an optional embodiment of the utility model is shown;

[0026] Figure 3 A schematic structural diagram of an optical imaging lens in a first state according to a first embodiment of the utility model is shown;

[0027] Figure 4 A schematic structural diagram of an optical imaging lens in a second state according to a first embodiment of the utility model is shown;

[0028] Figure 5 A schematic structural diagram of an optical imaging lens in a third state according to a first embodiment of the present utility model is shown;

[0029] Figures 6 to 9 The magnification chromatic aberration curve, the axial chromatic aberration curve, the astigmatism curve and the distortion curve of the optical imaging lens of the first embodiment of the utility model are respectively shown;

[0030] Fig.10 A schematic structural diagram of an optical imaging lens in a first state according to a second embodiment of the present utility model is shown;

[0031] Fig.11 A schematic structural diagram of an optical imaging lens in a second state according to a second embodiment of the present utility model is shown;

[0032] Fig.12 A schematic structural diagram of an optical imaging lens in a third state according to a second embodiment of the present utility model is shown;

[0033] Figures 13 to 16 The magnification chromatic aberration curve, the axial chromatic aberration curve, the astigmatism curve and the distortion curve of the optical imaging lens of the second embodiment of the utility model are respectively shown;

[0034] Fig.17 A schematic structural diagram of an optical imaging lens in a first state according to a third embodiment of the present utility model is shown;

[0035] Fig.18 A schematic structural diagram of an optical imaging lens in a second state according to a third embodiment of the present utility model is shown;

[0036] Fig.19 A schematic structural diagram of an optical imaging lens in a third state according to a third embodiment of the present utility model is shown;

[0037] Figure 20 to Figure 23 The magnification chromatic aberration curve, the axial chromatic aberration curve, the astigmatism curve and the distortion curve of the optical imaging lens of the third embodiment of the utility model are respectively shown;

[0038] Fig.24 A stray light diagram is shown when an optical imaging lens according to an optional embodiment of the present invention satisfies d4s / F2=-0.51 and EPB4 / LB-R7 / R8=0.11;

[0039] Fig.25 A stray light diagram is shown when the optical imaging lens of an optional embodiment of the present invention satisfies d4s / F2=-0.51 and EPB4 / LB-R7 / R8=0.14;

[0040] Fig.26 A stray light diagram is shown when the optical imaging lens of an optional embodiment of the present invention satisfies d4s / F2=-0.51 and EPB4 / LB-R7 / R8=-1;

[0041] Fig. 27 A stray light diagram is shown when the optical imaging lens of an optional embodiment of the present invention satisfies d4s / F2=-0.51 and EPB4 / LB-R7 / R8=1.

[0042] The above drawings include the following reference numerals:

[0043] E1, first lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; E2, second lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; E3, third lens; S5, object-side surface of the third lens; S6, image-side surface of the third lens; E4, fourth lens; S7, object-side surface of the fourth lens; S8, image-side surface of the fourth lens; E5, fifth lens; S9, object-side surface of the fifth lens; S10, image-side surface of the fifth lens; PA, first lens barrel; PB, second lens barrel; P1, first spacer; P1b, first auxiliary spacer; P2, second spacer; P2b, second auxiliary spacer; P4, fourth spacer; P4b, fourth auxiliary spacer. DETAILED DESCRIPTION

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

[0045] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0046] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0047] 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.

[0048] 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.

[0049] In this article, the paraxial area refers to the area 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 area; 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 area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledgeable people in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the light incident side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the light exiting side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0050] In order to solve the problem that it is difficult to improve stray light in optical imaging lenses in the prior art, the utility model provides an optical imaging lens.

[0051] like Figures 1 to 27As shown, in an alternative embodiment of the present application, the optical imaging lens includes a first barrel, a second barrel, a first lens group, a second lens group, and a plurality of spacers. The first lens group is disposed in the first barrel and includes, in order from the object side to the image side, a first lens, a second lens, and a third lens with positive optical power. The second lens group is disposed in the second barrel and includes, in order from the object side to the image side, a fourth lens with negative optical power and a fifth lens. The object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The plurality of spacers includes at least a first spacer, a second spacer, and a fourth spacer. Among them, the inner diameter of the fourth spacer is the smallest. The first spacer is located on the image side of the first lens and partially abuts against the image side surface of the first lens. The second spacer is located on the image side of the second lens and partially abuts against the image side surface of the second lens. The fourth spacer is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. When the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the on-axis distance EPB4 from the object side end face of the second barrel to the object side surface of the fourth spacer, the maximum axial height LB of the second barrel, the curvature radius R7 of the object side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: 0.1 < EPB4 / LB - R7 / R8 < 0.5.

[0052] The optical imaging lens of the present application is composed of a first barrel and a first lens group disposed therein, a second barrel and a second lens group disposed therein, and a plurality of spacers. The first lens group is composed of three lenses, and the second lens group is composed of two lenses. When it is restricted that the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the object side inner diameter of the fourth spacer is relatively small, resulting in tail-end stray light, which is not conducive to improving the stray light of the optical imaging lens. Therefore, by restricting 0.1 < EPB4 / LB - R7 / R8 < 0.5, the stray light phenomenon can be effectively improved, and some stray light can be avoided through the size compression and the light-shielding effect of the spacers. The limitation of the maximum axial height of the second barrel can avoid tail-end stray light. The energy of this type of stray light is relatively strong and difficult to improve. By controlling the curvature radius of the fourth lens and the effective focal length of the second lens group, the divergence degree of light refraction can be improved, which is beneficial to improving and avoiding the complex stray light generated by the internal reflection of the mechanism diameter. The inner diameter size of the spacer is conducive to blocking the generated stray light. The limitation of EPB4 makes the structural space more compact, further avoiding the generation of stray light and ensuring that the spacer can effectively play the role of blocking light.

[0053] In addition, on the premise that the optical imaging lens satisfies d4s / F2 = -0.51, Fig.24 shows the stray light diagram of the optical imaging lens when EPB4 / LB - R7 / R8 = 0.11; Fig.25Shows the stray light diagram of the optical imaging lens when EPB4 / LB-R7 / R8 = 0.14;

[0054] Fig.26 Shows the stray light diagram of the optical imaging lens when EPB4 / LB-R7 / R8 = -1; Fig. 27 Shows the stray light diagram of the optical imaging lens when EPB4 / LB-R7 / R8 = 1. It can be seen that Figure 24 to Figure 27 when EPB4 / LB-R7 / R8 = -1 and EPB4 / LB-R7 / R8 = 1, the improvement of stray light is poor, and when EPB4 / LB-R7 / R8 = 0.11 and EPB4 / LB-R7 / R8 = 0.14, the improvement of stray light is better. It can be seen that when EPB4 / LB-R7 / R8 is in the range of 0.1 to 0.5, the improvement of stray light of the optical imaging lens is better. Therefore, in this application, by restricting 0.1 < EPB4 / LB-R7 / R8 < 0.5, while making the structural space more compact, the generation of stray light can be avoided, and the imaging quality of the optical imaging lens can be guaranteed.

[0055] In this embodiment, the effective focal length f5 of the fifth lens, the Abbe number V5 of the fifth lens and the image-side outer diameter D4m of the fourth spacer satisfy: -0.1 < f5 / V5 / D4m < 0.3. By controlling the above parameters, the chromatic aberration of the optical system can be effectively optimized, and the purple fringing phenomenon during imaging can be significantly improved.

[0056] In this embodiment, the maximum axial height LA of the first lens barrel, the maximum axial height LB of the second lens barrel, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy: -0.2 < (LA - LB) / (F1 - F2) < 0.3. By controlling the above parameters, the spatial volume size of the optical imaging lens and the divergence degree of light can be restricted, and the generation of complex stray light can be effectively avoided.

[0057] In this embodiment, the inner diameter d1m of the image side of the first spacer, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -2 < d1m / f1 - d1m / f2 < 2. By controlling the above parameters, the divergence of light can be effectively restricted, thereby avoiding the generation of some complex stray light, and the stray light generated by the spacer blocking mechanism can be blocked.

[0058] In this embodiment, the inner diameter d2m of the image side of the second spacer, the outer diameter D2m of the image side of the second spacer, the curvature radius R4 of the image side of the second lens and the curvature radius R5 of the object side of the third lens satisfy: -4 < (D2m - d2m) / (R4 + R5) < 0.5. By controlling the above parameters, under the condition of providing sufficient assembly bearing length, the generation of complex stray light can be effectively avoided, and the imaging quality can be improved.

[0059] In this embodiment, the effective focal length f4 of the fourth lens, the on-axis distance EPB4 from the object-side end face of the second lens barrel to the object-side surface of the fourth spacer, and the refractive index N4 of the fourth lens satisfy: -20 < f4 / EPB4 / N4 < 0. By controlling the above parameters, the chromatic aberration and the length of the optical imaging lens can be effectively limited, and the purple fringing phenomenon can be improved.

[0060] In this embodiment, the plurality of spacers further includes a first auxiliary spacer. The first auxiliary spacer is located between the first spacer and the second lens. The object-side surface of the first auxiliary spacer partially abuts against the first spacer. The inner diameter D1bm of the image-side surface of the first auxiliary spacer, the inner diameter D1bs of the object-side surface of the first auxiliary spacer, the curvature radius R3 of the object-side surface of the second lens, and the curvature radius R2 of the image-side surface of the first lens satisfy: -3 < D1bm / R3 + D1bs / R2 < 5. By controlling the above parameters, under the condition of providing sufficient assembly abutting length, the generation of complex stray light can be effectively avoided by means of the shielding function of the spacer, and the imaging quality can be improved.

[0061] In this embodiment, the plurality of spacers further includes a second auxiliary spacer and a fourth auxiliary spacer. The second auxiliary spacer is located between the second spacer and the third lens and the object-side surface of the second auxiliary spacer partially abuts against the second spacer. The fourth auxiliary spacer is located between the fourth spacer and the fifth lens and the object-side surface of the fourth auxiliary spacer partially abuts against the fourth spacer. The thickness CP1b of the first auxiliary spacer, the thickness CP2b of the second auxiliary spacer, the thickness CP4b of the fourth auxiliary spacer, the air gap T12 between the first lens and the second lens, the air gap T23 between the second lens and the third lens, and the air gap T45 between the fourth lens and the fifth lens satisfy: 0.3 < (CP1b + CP2b + CP4b) / (T12 + T23 + T45) < 2. By controlling the above parameters, on the premise of ensuring the assembly stability, the total length of the optical imaging lens can be effectively limited, thereby avoiding the influence of the performance being easily affected by the fluctuation due to too large an air gap.

[0062] In this embodiment, the thickness CP1 of the first spacer and the thickness CP1b of the first auxiliary spacer satisfy: CP1b > CP1; the thickness CP2 of the second spacer and the thickness CP2b of the second auxiliary spacer satisfy: CP2b > CP2; the thickness CP4 of the fourth spacer and the thickness CP4b of the fourth auxiliary spacer satisfy: CP4b > CP4. By controlling the above relationships, the limitation of the thickness helps to enhance the assembly stability of the optical imaging lens, improve the processability of the spacer, and obtain better component quality.

[0063] In this embodiment, the sum of the thicknesses of multiple spacers ∑CP and the effective focal length f of the optical imaging lens satisfy: 4 < f / ∑CP < 12. By controlling the above parameters, the overall optical length and the back focus of the optical imaging lens can be effectively limited, ensuring miniaturization while compressing the back focus.

[0064] In this embodiment, the object-side inner diameter dAs of the first lens barrel, the object-side inner diameter dBs of the second lens barrel, the effective focal length F1 of the first lens group, and the effective focal length F2 of the second lens group satisfy: 1.5 < dAs / F1 - dBs / F2 < 2. By controlling the above parameters, the distance from the imaging surface to the end of the optical imaging lens can be effectively limited, making the overall size and the back focus of the optical imaging lens smaller.

[0065] In this embodiment, the effective focal length f3 of the third lens, the on-axis distance EP24 from the image side surface of the second spacer to the object side surface of the fourth spacer, and the on-axis distance EPB4 from the object side end surface of the second lens barrel to the object side surface of the fourth spacer satisfy: 4 < f3 / (EP24 - EPB4) < 30. By controlling the above parameters, the travel length from the finite distance to the infinite distance during internal focusing can be limited.

[0066] In this embodiment, the image side surface of the fifth lens is adhesively bonded to the inner wall surface of the second lens barrel. The fixed connection between the two is achieved by applying adhesive to the image side surface of the fifth lens and the second lens barrel, which is beneficial to enhancing the reliability of the optical imaging lens and ensuring that its structural stability and overall performance are not affected under the drop condition.

[0067] In this embodiment, the air gap between the third lens and the fourth lens is adjustably arranged, and the focusing of the optical imaging lens is achieved by adjusting the air gap between the third lens and the fourth lens. By changing the air gap between the third lens and the fourth lens, the telephoto lens can achieve clear imaging of an object at a macro distance and at infinity.

[0068] As Figures 1 to 27As shown, in another alternative embodiment of the present application, the present application further provides an optical imaging lens. The optical imaging lens includes a first lens barrel, a second lens barrel, a first lens group, a second lens group, and a plurality of spacers. The first lens group is disposed in the first lens barrel. The first lens group sequentially includes a first lens, a second lens, and a third lens with positive optical power from the object side to the image side. The second lens group is disposed in the second lens barrel. The second lens group sequentially includes a fourth lens with negative optical power and a fifth lens from the object side to the image side. The object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The plurality of spacers at least includes a first spacer, a second spacer, and a fourth spacer. Among them, the inner diameter of the fourth spacer is the smallest. The first spacer is located on the image side of the first lens and partially abuts against the image side surface of the first lens. The second spacer is located on the image side of the second lens and partially abuts against the image side surface of the second lens. The fourth spacer is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. When the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the maximum axial height LA of the first lens barrel, the maximum axial height LB of the second lens barrel, the effective focal length F1 of the first lens group, and the effective focal length F2 of the second lens group satisfy: -0.2 < (LA - LB) / (F1 - F2) < 0.3.

[0069] The optical imaging lens of the present application is composed of a first lens barrel and a first lens group disposed therein, a second lens barrel and a second lens group disposed therein, and a plurality of spacers. The first lens group is composed of three lenses, and the second lens group is composed of two lenses. When it is restricted that the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the object side inner diameter of the fourth spacer is relatively small, resulting in tail-end stray light, which is not conducive to the improvement of stray light in the optical imaging lens. Therefore, by restricting -0.2 < (LA - LB) / (F1 - F2) < 0.3, the present application can limit the spatial volume size of the optical imaging lens and the divergence degree of light, effectively avoiding the generation of complex stray light.

[0070] Of course, other parametric formulas in the above embodiments may also be included in this embodiment, which will not be elaborated here one by one.

[0071] Such as Figures 1 to 27As shown, in another alternative embodiment of the present application, the present application further provides an optical imaging lens. The optical imaging lens includes a first lens barrel, a second lens barrel, a first lens group, a second lens group, and a plurality of spacers. The first lens group is disposed in the first lens barrel. The first lens group sequentially includes a first lens, a second lens, and a third lens with positive optical power from the object side to the image side. The second lens group is disposed in the second lens barrel. The second lens group sequentially includes a fourth lens with negative optical power and a fifth lens from the object side to the image side. The object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The plurality of spacers at least includes a first spacer, a second spacer, and a fourth spacer. Among them, the inner diameter of the fourth spacer is the smallest. The first spacer is located on the image side of the first lens and partially abuts against the image side surface of the first lens. The second spacer is located on the image side of the second lens and partially abuts against the image side surface of the second lens. The fourth spacer is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. The following relationship is satisfied among the effective focal length f5 of the fifth lens, the Abbe number V5 of the fifth lens, and the image side outer diameter D4m of the fourth spacer: -0.1 < f5 / V5 / D4m < 0.3.

[0072] The optical imaging lens of the present application is composed of a first lens barrel and a first lens group disposed therein, a second lens barrel and a second lens group disposed therein, and a plurality of spacers. The first lens group is composed of three lenses, and the second lens group is composed of two lenses. By restricting -0.1 < f5 / V5 / D4m < 0.3, the chromatic aberration of the optical system can be effectively optimized, the purple fringing phenomenon during imaging can be significantly improved, and the imaging quality can be guaranteed.

[0073] Of course, other parametric formulas in the above embodiments may also be included in this embodiment, which will not be elaborated one by one here.

[0074] Optionally, the above optical imaging lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0075] The optical imaging lens in the present application may employ multiple lenses, such as the five lenses mentioned above. In the present application, at least one of the lens surfaces of each 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.

[0076] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0077] Figure 1 FIG. 1 shows a schematic diagram of the structure of an optical imaging lens of the present application. Figure 2 A schematic diagram of the structure of another optical imaging lens of the present application is shown; wherein, Figure 1 The parameters of dAs, D2m, d2m, D1bm, d1bs, d1m, d4s, D4m, dBs, LA, LB, CP1, CP1b, CP2, CP2b, CP4, EP24, and EPB4 are marked to clearly and intuitively understand the meaning of the parameters. Figure 2 The parameters of CP4b are shown in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the optical imaging lens and the specific surface type, these parameters will no longer be reflected in the drawings when describing the specific embodiments later.

[0078] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0079] It should be noted that in the following embodiments, there are a first state, a second state and a third state, and in the first state, the second state and the third state of the same embodiment, the parameters such as the curvature radius, the center thickness of the first lens to the fifth lens, the spacing distance between the lenses and the coefficient of the higher order terms are the same, but the parameters such as the thickness, the inner diameter and the outer diameter of the first lens barrel, the second lens barrel, the first spacer, the second spacer and the fourth spacer, and the shapes of some lenses are different. In other words, the main structure for imaging is the same, but the auxiliary structure for imaging is different.

[0080] It should be noted that any one of the following embodiments 1 to 3 is applicable to all embodiments of the present application.

[0081] Embodiment 1

[0082] like Figures 3 to 9 As shown, the optical imaging lens of the first embodiment is described. Figure 3 FIG. 1 is a schematic diagram showing the structure of the optical imaging lens of Embodiment 1 in a first state. Figure 4 FIG. 4 is a schematic diagram showing the structure of the optical imaging lens in the second state according to the first embodiment. Figure 5A schematic structural diagram of the optical imaging lens of Embodiment 1 in a third state is shown.

[0083] like Figures 3 to 5 As shown, the optical imaging lens comprises a first lens barrel PA and a first lens group arranged therein, a second lens barrel PB and a second lens group arranged therein and a plurality of spacers, the second lens barrel PB is located on the image side of the first lens barrel PA, and the first lens barrel PA comprises, from the object side to the image side: a first lens E1, a first spacer P1, a first auxiliary spacer P1b, a second lens E2, a second spacer P2, a second auxiliary spacer P2b, and a third lens E3; the second lens barrel PB comprises, from the object side to the image side: a fourth lens E4, a fourth spacer P4 and a fifth lens E5.

[0084] like Figure 3 As shown, in the first state, the object side surface S1 of the first lens partially abuts against the first lens barrel PA. The object side surface and the image side surface of the first spacer P1 partially abut against the image side surface S2 of the first lens and the object side surface of the first auxiliary spacer P1b, respectively, and the image side surface of the first auxiliary spacer P1b partially abuts against the object side surface S3 of the second lens. The object side surface and the image side surface of the second spacer P2 partially abut against the image side surface S4 of the second lens and the object side surface of the second auxiliary spacer P2b, respectively, and the image side surface of the second auxiliary spacer P2b partially abuts against the object side surface S5 of the third lens. The object side surface and the image side surface of the fourth spacer P4 partially abut against the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively. The image side surface S10 of the fifth lens is fixed to the inner wall surface of the second lens barrel PB by glue.

[0085] like Figure 4 As shown, when the optical imaging lens is in the second state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0086] like Figure 5 As shown, when the optical imaging lens is in the third state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0087] In summary, the structural parameters of the optical imaging lens of Example 1 in the first state 1-1, the second state 1-2 and the third state 1-3 are shown in Table 1. (Unit: mm)

[0088]

[0089]

[0090] Table 1

[0091] In the first embodiment, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The object side surface S7 of the fourth lens is a concave surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a concave surface.

[0092] In Example 1, the effective focal length f1 of the first lens is 16.82 mm, the effective focal length f2 of the second lens is -9.43 mm, the effective focal length f3 of the third lens is 6.17 mm, the effective focal length f4 of the fourth lens is -50.84 mm, the effective focal length f5 of the fifth lens is -10.22 mm, the effective focal length F1 of the first lens group is 8.96 mm, the effective focal length F2 of the second lens group is -8.03 mm, the effective focal length f of the optical imaging lens is 14.21 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 16.86°, and the entrance pupil diameter EPD of the optical imaging lens is 7.69 mm.

[0093] Table 2 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0094]

[0095]

[0096] Table 2

[0097] In the first embodiment, the object side surface and the image side surface of the first lens to the fifth lens are all aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0098]

[0099] 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, that is, the paraxial curvature c is the reciprocal of the curvature radius R in the above Table 1; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 3 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspheric mirror surface S1-S10 in Example 1.

[0100] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.2052E-04 4.4064E-05 -4.9313E-05 3.5062E-05 -1.2985E-05 3.0095E-06 -4.6367E-07 S2 -1.8797E-04 -2.5126E-05 6.8255E-05 -1.7785E-05 2.7210E-06 -2.7592E-07 1.7595E-08 S3 2.9356E-02 -6.5101E-03 2.5510E-03 -9.9756E-04 2.8211E-04 -5.6567E-05 8.0843E-06 S4 1.6349E-02 8.7464E-04 -3.7075E-04 -9.6303E-06 1.5736E-05 -3.0835E-06 3.2479E-07 S5 -1.2967E-02 6.4527E-03 -2.4983E-03 7.6007E-04 -1.7930E-04 3.1538E-05 -4.0001E-06 S6 -1.0273E-03 6.1326E-04 -8.6624E-04 6.9113E-04 -3.3641E-04 1.0928E-04 -2.4793E-05 S7 5.1436E-03 -8.5428E-04 1.9749E-04 2.0978E-05 -4.0141E-05 1.6296E-05 -3.7716E-06 S8 4.7258E-03 -1.1499E-03 5.7333E-04 -2.5151E-04 7.6767E-05 -1.6546E-05 2.4748E-06 S9 -2.0533E-02 4.8568E-03 -3.2364E-03 1.9414E-03 -7.1764E-04 1.1584E-04 2.0609E-05 S10 -1.9546E-02 5.2819E-03 -2.6830E-03 1.2685E-03 -4.0606E-04 7.6180E-05 -4.8268E-06 Face number A18 A20 A22 A24 A26 A28 A30 S1 4.8244E-08 -3.3533E-09 1.4925E-10 -3.8476E-12 4.3702E-14 0.0000E+00 0.0000E+00 S2 -6.3725E-10 9.9932E-12 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -8.1936E-07 5.7613E-08 -2.6764E-09 7.3980E-11 -9.2289E-13 0.0000E+00 0.0000E+00 S4 -2.0309E-08 7.1038E-10 -1.0728E-11 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 3.5254E-07 -2.0278E-08 6.5302E-10 -4.8332E-12 -3.5582E-13 8.4763E-15 0.0000E+00 S6 4.0153E-06 -4.6717E-07 3.8750E-08 -2.2359E-09 8.5267E-11 -1.9316E-12 1.9679E-14 S7 5.6089E-07 -5.4576E-08 3.3660E-09 -1.1957E-10 1.8652E-12 0.0000E+00 0.0000E+00 S8 -2.4967E-07 1.6145E-08 -6.0306E-10 9.8858E-12 0.0000E+00 0.0000E+00 0.0000E+00 S9 -1.6410E-05 4.4403E-06 -7.0792E-07 7.1852E-08 -4.5789E-09 1.6765E-10 -2.6970E-12 S10 -1.3575E-06 4.2954E-07 -6.0458E-08 5.0701E-09 -2.5976E-10 7.5336E-12 -9.5065E-14

[0101] Table 3

[0102] Figure 6 The magnification chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens. Figure 7 The axial chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 8 The astigmatism curve of the optical imaging lens of the first embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 9 The distortion curve of the optical imaging lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0103] according to Figures 6 to 9 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0104] Embodiment 2

[0105] like Figures 10 to 16 As shown, the optical imaging lens of the second embodiment is described. Fig.10 FIG. 1 shows a schematic structural diagram of the optical imaging lens of Embodiment 2 in a first state. Fig.11 FIG. 2 shows a schematic structural diagram of the optical imaging lens of Embodiment 2 in a second state. Fig.12 A schematic structural diagram of the optical imaging lens of the second embodiment in a third state is shown.

[0106] like Figures 10 to 12 As shown, the optical imaging lens comprises a first lens barrel PA and a first lens group arranged therein, a second lens barrel PB and a second lens group arranged therein and a plurality of spacers, the second lens barrel PB is located on the image side of the first lens barrel PA, and the first lens barrel PA comprises, from the object side to the image side, a first lens E1, a first spacer P1, a first auxiliary spacer P1b, a second lens E2, a second spacer P2, and a third lens E3; the second lens barrel PB comprises, from the object side to the image side, a fourth lens E4, a fourth spacer P4, a fourth auxiliary spacer P4b and a fifth lens E5.

[0107] like Fig.10As shown, in the first state, the object side surface S1 of the first lens partially abuts against the first lens barrel PA. The object side surface and image side surface of the first spacer P1 partially abut against the image side surface S2 of the first lens and the object side surface of the first auxiliary spacer P1b, respectively, and the image side surface of the first auxiliary spacer P1b partially abuts against the object side surface S3 of the second lens. The object side surface and image side surface of the second spacer P2 partially abut against the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and image side surface of the fourth spacer P4 partially abut against the image side surface S8 of the fourth lens and the object side surface of the fourth auxiliary spacer P4b, respectively, and the image side surface of the fourth auxiliary spacer P4b partially abuts against the object side surface S9 of the fifth lens. The image side surface S10 of the fifth lens is fixed to the inner wall surface of the second lens barrel PB by glue.

[0108] like Fig.11 As shown, when the optical imaging lens is in the second state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0109] like Fig.12 As shown, when the optical imaging lens is in the third state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0110] In summary, the structural parameters of the optical imaging lens of the second embodiment in the first state 2-1, the second state 2-2 and the third state 2-3 are shown in Table 4. (Unit: mm)

[0111]

[0112]

[0113] Table 4

[0114] In the second embodiment, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a convex surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The object side surface S7 of the fourth lens is a concave surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a convex surface, and the image side surface S10 of the fifth lens is a concave surface.

[0115] In Example 2, the effective focal length f1 of the first lens is 18.93 mm, the effective focal length f2 of the second lens is -29.59 mm, the effective focal length f3 of the third lens is 9.93 mm, the effective focal length f4 of the fourth lens is -8.73 mm, the effective focal length f5 of the fifth lens is 18.27 mm, the effective focal length F1 of the first lens group is 9.55 mm, the effective focal length F2 of the second lens group is -12.65 mm, the effective focal length f of the optical imaging lens is 14.22 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 28.24°, and the entrance pupil diameter EPD of the optical imaging lens is 7.66 mm.

[0116] Table 5 shows a basic structural parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0117]

[0118] Table 5

[0119] Table 6 shows the polynomial coefficients that can be used for each aspheric mirror surface in the second embodiment, wherein each aspheric surface shape can be defined by the formula (1) given in the first embodiment above.

[0120] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.2052E-04 4.4064E-05 -4.9313E-05 3.5062E-05 -1.2985E-05 3.0095E-06 -4.6367E-07 S2 -1.8797E-04 -2.5126E-05 6.8255E-05 -1.7785E-05 2.7210E-06 -2.7592E-07 1.7595E-08 S3 2.9356E-02 -6.5101E-03 2.5510E-03 -9.9756E-04 2.8211E-04 -5.6567E-05 8.0843E-06 S4 1.6349E-02 8.7464E-04 -3.7075E-04 -9.6303E-06 1.5736E-05 -3.0835E-06 3.2479E-07 S5 -1.2967E-02 6.4527E-03 -2.4983E-03 7.6007E-04 -1.7930E-04 3.1538E-05 -4.0001E-06 S6 -1.0273E-03 6.1326E-04 -8.6624E-04 6.9113E-04 -3.3641E-04 1.0928E-04 -2.4793E-05 S7 5.1436E-03 -8.5428E-04 1.9749E-04 2.0978E-05 -4.0141E-05 1.6296E-05 -3.7716E-06 S8 4.7258E-03 -1.1499E-03 5.7333E-04 -2.5151E-04 7.6767E-05 -1.6546E-05 2.4748E-06 S9 -2.0533E-02 4.8568E-03 -3.2364E-03 1.9414E-03 -7.1764E-04 1.1584E-04 2.0609E-05 S10 -1.9546E-02 5.2819E-03 -2.6830E-03 1.2685E-03 -4.0606E-04 7.6180E-05 -4.8268E-06 Face number A18 A20 A22 A24 A26 A28 A30 S1 4.8244E-08 -3.3533E-09 1.4925E-10 -3.8476E-12 4.3702E-14 0.0000E+00 0.0000E+00 S2 -6.3725E-10 9.9932E-12 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -8.1936E-07 5.7613E-08 -2.6764E-09 7.3980E-11 -9.2289E-13 0.0000E+00 0.0000E+00 S4 -2.0309E-08 7.1038E-10 -1.0728E-11 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 3.5254E-07 -2.0278E-08 6.5302E-10 -4.8332E-12 -3.5582E-13 8.4763E-15 0.0000E+00 S6 4.0153E-06 -4.6717E-07 3.8750E-08 -2.2359E-09 8.5267E-11 -1.9316E-12 1.9679E-14 S7 5.6089E-07 -5.4576E-08 3.3660E-09 -1.1957E-10 1.8652E-12 0.0000E+00 0.0000E+00 S8 -2.4967E-07 1.6145E-08 -6.0306E-10 9.8858E-12 0.0000E+00 0.0000E+00 0.0000E+00 S9 -1.6410E-05 4.4403E-06 -7.0792E-07 7.1852E-08 -4.5789E-09 1.6765E-10 -2.6970E-12 S10 -1.3575E-06 4.2954E-07 -6.0458E-08 5.0701E-09 -2.5976E-10 7.5336E-12 -9.5065E-14

[0121] Table 6

[0122] Fig.13 The magnification chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens. Fig.14 The axial chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.15 The astigmatism curve of the optical imaging lens of the second embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.16 The distortion curve of the optical imaging lens of the second embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0123] according to Figures 13 to 16 It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0124] Embodiment 3

[0125] like Figures 17 to 23 As shown, the optical imaging lens of embodiment 3 is described. Fig.17 FIG. 1 shows a schematic structural diagram of the optical imaging lens of Embodiment 3 in a first state. Fig.18 FIG. 4 is a schematic diagram showing the structure of the optical imaging lens of Embodiment 3 in the second state. Fig.19 A schematic structural diagram of the optical imaging lens of Embodiment 3 in a third state is shown.

[0126] like Figures 17 to 19 As shown, the optical imaging lens comprises a first lens barrel PA and a first lens group arranged therein, a second lens barrel PB and a second lens group arranged therein and a plurality of spacers, the second lens barrel PB is located on the image side of the first lens barrel PA, and the first lens barrel PA comprises, from the object side to the image side, a first lens E1, a first spacer P1, a first auxiliary spacer P1b, a second lens E2, a second spacer P2, and a third lens E3; the second lens barrel PB comprises, from the object side to the image side, a fourth lens E4, a fourth spacer P4 and a fifth lens E5.

[0127] like Fig.17 As shown, in the first state of the optical imaging lens, the object side surface S1 of the first lens partially abuts against the first lens barrel PA. The object side surface and the image side surface of the first spacer P1 partially abut against the image side surface S2 of the first lens and the object side surface of the first auxiliary spacer P1b, respectively, and the image side surface of the first auxiliary spacer P1b partially abuts against the object side surface S3 of the second lens. The object side surface and the image side surface of the second spacer P2 partially abut against the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and the image side surface of the fourth spacer P4 partially abut against the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively. The image side surface S10 of the fifth lens is fixed to the inner wall surface of the second lens barrel PB by glue.

[0128] like Fig.18 As shown, when the optical imaging lens is in the second state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0129] like Fig.19 As shown, when the optical imaging lens is in the third state, the supporting and abutting manner of each spacer is the same as that in the first state. Please refer to the relevant description in the first state and will not be repeated here.

[0130] In summary, the structural parameters of the optical imaging lens of the third embodiment in the first state 3-1, the second state 3-2 and the third state 3-3 are shown in Table 7. (Unit: mm)

[0131] Parameters / Status 3-1 3-2 3-3 d1m 7.64 7.56 7.57 D1bs 9.01 8.48 8.97 D1b 8.97 8.88 8.89 d2m 6.79 6.43 6.79 D2m 10.2 9.9 10.2 d4s 5.71 5.71 5.71 D4m 8.4 8.4 8.4 dA 11.17 11.17 11.17 dBs 6.13 6.13 6.13 EPB4 1.2 1.2 1.2 EP24 3.49 3.21 3.49 LA 9.69 9.69 9.69 LB 6.3 6.3 6.3 CP1 0.03 0.03 0.03 CP1b 1.16 1.36 1.36 CP2 0.03 0.03 0.03 CP4 0.03 0.03 0.03

[0132] Table 7

[0133] In the third embodiment, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is convex. The object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is convex. The object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is convex. The object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave.

[0134] In Example 3, the effective focal length f1 of the first lens is -30.69 mm, the effective focal length f2 of the second lens is 7.65 mm, the effective focal length f3 of the third lens is 54.85 mm, the effective focal length f4 of the fourth lens is -10.34 mm, the effective focal length f5 of the fifth lens is 88.47 mm, the effective focal length F1 of the first lens group is 9.34 mm, the effective focal length F2 of the second lens group is -9.33 mm, the effective focal length f of the optical imaging lens is 14.22 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 16.50°, and the entrance pupil diameter EPD of the optical imaging lens is 7.63 mm.

[0135] Table 8 shows a basic structural parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0136]

[0137] Table 8

[0138] Table 9 shows the polynomial coefficients that can be used for each aspheric mirror surface in the third embodiment, wherein each aspheric surface shape can be defined by the formula (1) given in the first embodiment above.

[0139]

[0140]

[0141] Table 9

[0142] Fig. 20 The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens. Fig.21 The axial chromatic aberration curve of the optical imaging lens of the third embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig. 22 The astigmatism curve of the optical imaging lens of the third embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.23 The distortion curve of the optical imaging lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0143] according to Figure 20 to Figure 23 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0144] In summary, Embodiments 1 to 3 respectively satisfy the relationship shown in Table 10.

[0145]

[0146] Table 10

[0147] It should be noted that, in Table 10, 1-1 represents the optical imaging lens in Example 1 in the first state, 1-2 represents the optical imaging lens in Example 1 in the second state, 1-3 represents the optical imaging lens in Example 1 in the third state, 2-1 represents the optical imaging lens in Example 2 in the first state, 2-2 represents the optical imaging lens in Example 2 in the second state, 2-3 represents the optical imaging lens in Example 2 in the third state, 3-1 represents the optical imaging lens in Example 3 in the first state, 3-2 represents the optical imaging lens in Example 3 in the second state, and 3-3 represents the optical imaging lens in Example 3 in the third state.

[0148] 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.

[0149] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0150] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0151] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0152] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An optical imaging lens, characterized in that: It includes a first lens barrel, a second lens barrel, a first lens group, a second lens group and a plurality of spacers. The first lens group is arranged in the first lens barrel. The first lens group sequentially includes a first lens, a second lens and a third lens with positive optical power from the object side to the image side. The second lens group is arranged in the second lens barrel. The second lens group sequentially includes a fourth lens and a fifth lens with negative optical power from the object side to the image side. The object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The plurality of spacers at least includes a first spacer, a second spacer and a fourth spacer. Among them, the inner diameter of the fourth spacer is the smallest. The first spacer is located on the image side of the first lens and partially abuts against the image side surface of the first lens. The second spacer is located on the image side of the second lens and partially abuts against the image side surface of the second lens. The fourth spacer is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. When the object side inner diameter d4s of the fourth spacer and the effective focal length F2 of the second lens group satisfy: -0.8 < d4s / F2 < 0, the axial distance EPB4 from the object side end face of the second lens barrel to the object side surface of the fourth spacer, the maximum axial height LB of the second lens barrel, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy: 0.1 < EPB4 / LB - R7 / R8 < 0.

5.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens, the Abbe number V5 of the fifth lens and the image side outer diameter D4m of the fourth spacer satisfy: -0.1 < f5 / V5 / D4m < 0.

3.

3. The optical imaging lens according to claim 1, wherein: The maximum axial height LA of the first lens barrel, the maximum axial height LB of the second lens barrel, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy: -0.2 < (LA - LB) / (F1 - F2) < 0.

3.

4. The optical imaging lens according to claim 1, wherein: The inner diameter d1m of the image side surface of the first spacer, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -2 < d1m / f1 - d1m / f2 < 2.

5. The optical imaging lens according to claim 1, wherein: The inner diameter d2m of the image side surface of the second spacer, the outer diameter D2m of the image side surface of the second spacer, the curvature radius R4 of the image side surface of the second lens and the curvature radius R5 of the object side surface of the third lens satisfy: -4 < (D2m - d2m) / (R4 + R5) < 0.

5.

6. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens, the axial distance EPB4 from the object side end face of the second lens barrel to the object side surface of the fourth spacer and the refractive index N4 of the fourth lens satisfy: -20 < f4 / EPB4 / N4 < 0.

7. The optical imaging lens according to claim 1, wherein: The plurality of spacers further includes a first auxiliary spacer. The first auxiliary spacer is located between the first spacer and the second lens. The object side surface of the first auxiliary spacer partially abuts against the first spacer. The inner diameter D1bm of the image side surface of the first auxiliary spacer, the inner diameter D1bs of the object side surface of the first auxiliary spacer, the curvature radius R3 of the object side surface of the second lens and the curvature radius R2 of the image side surface of the first lens satisfy: <D1bm / R3+D1bs / R2<5。 8. The optical imaging lens according to claim 1, wherein: The plurality of spacers further include a first auxiliary spacer, a second auxiliary spacer, and a fourth auxiliary spacer, the first auxiliary spacer being located between the first spacer and the second lens, the object side surface of the first auxiliary spacer being partially supported by the first spacer, the second auxiliary spacer being located between the second spacer and the third lens, the object side surface of the second auxiliary spacer being partially supported by the second spacer, the fourth auxiliary spacer being located between the fourth spacer and the fifth lens, the object side surface of the fourth auxiliary spacer being partially supported by the fourth spacer, The thickness CP1b of the first auxiliary spacer, the thickness CP2b of the second auxiliary spacer, the thickness CP4b of the fourth auxiliary spacer, the air gap T12 between the first lens and the second lens, the air gap T23 between the second lens and the third lens, and the air gap T45 between the fourth lens and the fifth lens satisfy: 0.3<(CP1b+CP2b+CP4b) / (T12+T23+T45)<2.

9. The optical imaging lens according to claim 1, wherein: The plurality of spacers further include a first auxiliary spacer, a second auxiliary spacer, and a fourth auxiliary spacer, the first auxiliary spacer being located between the first spacer and the second lens, the object side surface of the first auxiliary spacer being partially supported by the first spacer, the second auxiliary spacer being located between the second spacer and the third lens, the object side surface of the second auxiliary spacer being partially supported by the second spacer, the fourth auxiliary spacer being located between the fourth spacer and the fifth lens, the object side surface of the fourth auxiliary spacer being partially supported by the fourth spacer, The thickness CP1 of the first spacer and the thickness CP1b of the first auxiliary spacer satisfy: CP1b>CP1; The thickness CP2 of the second spacer and the thickness CP2b of the second auxiliary spacer satisfy: CP2b>CP2; A thickness CP4 of the fourth spacer and a thickness CP4b of the fourth auxiliary spacer satisfy: CP4b>CP4.

10. The optical imaging lens according to claim 1, wherein: The sum of the thicknesses ∑CP of the plurality of spacers and the effective focal length f of the optical imaging lens satisfy the following relationship: <f / ∑CP<12。 11. The optical imaging lens according to claim 1, wherein: The object side inner diameter dAs of the first lens barrel, the object side inner diameter dBs of the second lens barrel, the effective focal length F1 of the first lens group and the effective focal length F2 of the second lens group satisfy: 1.5 <dAs / F1-dBs / F2<2。 12. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens, the axial distance EP24 from the image side surface of the second spacer to the object side surface of the fourth spacer, and the axial distance EPB4 from the object side end surface of the second lens barrel to the object side surface of the fourth spacer satisfy the following conditions: <f3 / (EP24-EPB4)<30。 13. The optical imaging lens according to any one of claims 1 to 12, characterized in that: The image side surface of the fifth lens is glued to the inner wall surface of the second lens barrel.

14. The optical imaging lens according to any one of claims 1 to 12, characterized in that: The air space between the third lens and the fourth lens is adjustable, and the focusing of the optical imaging lens is achieved by adjusting the air space between the third lens and the fourth lens.

Images