Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a lens barrel, a lens group and a spacing assembly, wherein the lens group and the spacing assembly are accommodated in the lens barrel; the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side along an optical axis, the second lens has positive focal power, and the object side surface and the image side surface of the second lens are convex surfaces; the third lens has focal power, and the object side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the object side surface and the image side surface of the fourth lens are convex surfaces; the fifth lens has negative focal power, and the object side surface and the image side surface of the fifth lens are concave surfaces; the optical lens satisfies the following conditions: TD * tan (HFOV) is more than 6.20 mm and less than 6.95 mm; and [sigma] EP / EP01 * R1 is greater than or equal to-10.50 mm and less than-5.75 mm.

Description

Technical Field

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

[0002] In recent years, with the rise of smart phones, the proportion of mobile phone camera functions in mobile phone usage has become increasingly larger. With the development of technology, users have higher and higher requirements for the camera effects of mobile phones in different scenarios. The quality of mobile phone photos has gradually become one of the important indicators for users to choose mobile phones.

[0003] At the same time, as the image surface of mobile phone lenses becomes larger and larger, the lenses used in mobile phones need a larger field of view and light intake to ensure image quality. In order to achieve the purpose of increasing the field of view and light intake, the optical effective diameter difference between different lenses becomes larger and larger during the design of the lenses in the lens, resulting in a large step difference and a decrease in assembly stability.

[0004] This shows that the lenses currently used in mobile phones are difficult to strike a balance between image quality and assembly stability. Summary of the invention

[0005] One advantage of the present application is that it provides an optical lens that can solve the problem that traditional fixed-focus lenses cannot take into account both imaging quality and assembly stability.

[0006] On the one hand, the present application provides an optical lens, including a lens barrel and a lens group and a spacer assembly contained in the lens barrel; the lens group includes the following lenses arranged in sequence from the object side to the image side along the optical axis: The first lens has negative optical power, and its object side surface and image side surface are concave; The second lens has positive power, and its object side surface and image side surface are convex; The third lens has optical power and a convex object side surface; The fourth lens has positive power, and its object-side surface and image-side surface are convex; The fifth lens has negative power, and its object side surface and image side surface are concave; The spacer assembly comprises a first spacer element, a second spacer element, a third spacer element and a fourth spacer element, the first spacer element is disposed on the image side of the first lens and in contact with the image side surface of the first lens, the second spacer element is disposed on the image side of the second lens and in contact with the image side surface of the second lens, the third spacer element is disposed on the image side of the third lens and in contact with the image side surface of the third lens, and the fourth spacer element is disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens; The optical lens meets the following requirements: 6.20 mm<TD×tan(HFOV)<6.95 mm; and -10.50mm≤∑EP / EP01×R1<-5.75mm; Among them, ∑EP=EP01+EP12+EP23+EP34, EP01 is the distance between the object side of the lens barrel and the object side of the first spacer element, EP12 is the distance between the image side of the first spacer element and the object side of the second spacer element, EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element, EP34 is the distance between the image side of the third spacer element and the object side of the fourth spacer element, TD is the distance between the object side of the first lens and the image side of the fifth lens, HFOV is half of the maximum field of view of the optical lens, and R1 is the radius of curvature of the object side of the first lens.

[0007] In some embodiments of the present application, the optical lens satisfies: -1.05<(d0s-d1s) / R1<-0.15; Wherein, d0s is the inner diameter of the object side of the lens barrel, d1s is the inner diameter of the object side of the first spacing element, and R1 is the radius of curvature of the object side of the first lens.

[0008] In some embodiments of the present application, the optical lens satisfies: 1.15<(EP01+CP1) / (CT1+T12) <2.20; Among them, CP1 is the maximum thickness of the first spacer element, CT1 is the center thickness of the first lens, and T12 is the center thickness of the air gap between the image side surface of the first lens and the object side surface of the second lens.

[0009] In some embodiments of the present application, the optical lens satisfies: 0.10≤(D1m-d1m) / R3<1.25; Wherein, D1m is the outer diameter of the image side surface of the first spacing element, d1m is the inner diameter of the image side surface of the first spacing element, and R3 is the radius of curvature of the object side surface of the second lens.

[0010] In some embodiments of the present application, the optical lens satisfies: -3.20<f1 / d1m≤-1.40; Wherein, f1 is the effective focal length of the first lens, and d1m is the inner diameter of the image side surface of the first spacing element.

[0011] In some embodiments of the present application, the optical lens satisfies: 2.90 mm<EP13 / (CT1+CT2)×f12<12.00 mm; Among them, EP13 is the distance between the image side of the first spacer element and the object side of the third spacer element, CT1 is the center thickness of the first lens, CT2 is the center thickness of the second lens, and f12 is the combined focal length of the first lens and the second lens.

[0012] In some embodiments of the present application, the optical lens satisfies: 0.30<(D1s-d1s) / (D2s-d2s)<1.70; Wherein, D1s is the outer diameter of the side surface of the first spacer element, d1s is the inner diameter of the side surface of the first spacer element, D2s is the outer diameter of the side surface of the second spacer element, and d2s is the inner diameter of the side surface of the second spacer element.

[0013] In some embodiments of the present application, the optical lens satisfies: 1.30<d2s / CT2<2.40; Wherein d2s is the inner diameter of the side surface of the second spacer element, and CT2 is the center thickness of the second lens.

[0014] In some embodiments of the present application, the optical lens satisfies: -5.60<R4 / (D2s-d2s)<-0.85; Among them, R4 is the curvature radius of the image side of the second lens, D2s is the outer diameter of the object side of the second spacer element, and d2s is the inner diameter of the object side of the second spacer element.

[0015] In some embodiments of the present application, the optical lens satisfies: 0.20<CT3 / CP3<0.75; Wherein, CT3 is the center thickness of the third lens, and CP3 is the maximum thickness of the third spacing element.

[0016] In some embodiments of the present application, the optical lens satisfies: 0.80<(D3s-d3s) / CP3<3.05; Wherein, D3s is the outer diameter of the side surface of the third spacer element, d3s is the inner diameter of the side surface of the third spacer element, and CP3 is the maximum thickness of the third spacer element.

[0017] In some embodiments of the present application, the optical lens satisfies: 0.65<CP3 / EP23<2.80; Wherein, CP3 is the maximum thickness of the third spacing element.

[0018] In some embodiments of the present application, the optical lens satisfies: 0.40<(D4m-d4m) / CT4<2.15; Wherein, D4m is the outer diameter of the image side surface of the fourth spacing element, d4m is the inner diameter of the image side surface of the fourth spacing element, and CT4 is the center thickness of the fourth lens.

[0019] In some embodiments of the present application, the optical lens satisfies: 1.85<CT4 / EP34×n4<5.00; Wherein, CT4 is the center thickness of the fourth lens.

[0020] In some embodiments of the present application, the optical lens satisfies: -2.75<(D0m-D4m) / f5<-0.80; Wherein, D0m is the outer diameter of the image side of the lens barrel, D4m is the outer diameter of the image side of the fourth spacing element, and f5 is the effective focal length of the fifth lens.

[0021] In some embodiments of the present application, the optical lens satisfies: 0.10≤CP3 / |R7-R6|≤1.35; Among them, CP3 is the maximum thickness of the third spacing element, R7 is the curvature radius of the object side of the fourth lens, and R6 is the curvature radius of the image side of the third lens.

[0022] In some embodiments of the present application, the optical lens satisfies: 0.95<d0s / f<1.85; Wherein, d0s is the inner diameter of the object side of the lens barrel, and f is the effective focal length of the optical lens.

[0023] In summary, the optical lens of the present application is based on the restriction condition of 6.20mm<TD×tan(HFOV)<6.95mm, which reduces the length of the optical lens and realizes the miniaturization of the optical lens. Then, on the basis of ensuring a large field of view angle and a high amount of light input, it limits the occurrence of large step difference and improves the assembly stability of the optical lens.

[0024] Furthermore, the optical lens of the present application can reasonably arrange the lenses and spacing elements based on the restriction condition of -10.50mm≤∑EP / EP01×R1<-5.75mm, and especially optimize the position and structure of the first lens, so as to ensure that the first lens does not protrude from the side of the lens barrel, reduce the pressure damage of the first lens, and improve the assembly yield. In addition, the first lens with negative optical power cooperates with the second lens with positive optical power, which can realize the reasonable distribution of optical power of the optical system and effectively reduce the influence of chromatic aberration, thereby improving the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of structural parameters of an optical lens according to an embodiment of the present application; Figure 2AThe modulation transfer function curve of the optical lens is shown when TD×tan(HFOV)=6.50mm and ∑EP / EP01×R1=-11mm are satisfied at the same time; Figure 2B The modulation transfer function curve of the optical lens is shown when TD×tan(HFOV)=6.50mm and ∑EP / EP01×R1=-10mm are satisfied at the same time; Figure 2C The modulation transfer function curve of the optical lens is shown when TD×tan(HFOV)=6.50mm and ∑EP / EP01×R1=-6mm are satisfied at the same time; Figure 2D The modulation transfer function curve of the optical lens is shown when TD×tan(HFOV)=6.50mm and ∑EP / EP01×R1=-5mm are satisfied at the same time; Figure 3 is a schematic structural diagram of an optical lens according to Embodiment 1 of the present application; Figure 4 is a schematic structural diagram of an optical lens according to Embodiment 2 of the present application; Figure 5 is a schematic structural diagram of an optical lens according to Embodiment 3 of the present application; Fig. 6A A schematic diagram of an axial chromatic aberration curve of the optical lens according to the first embodiment, the second embodiment and the third embodiment of the present application is shown; Figure 6B Schematic diagrams of astigmatism curves of the optical lenses according to the first, second and third embodiments of the present application are shown; Figure 6C Schematic diagrams of distortion curves of the optical lenses according to the first, second and third embodiments of the present application are shown; Fig.6D A schematic diagram of magnification chromatic aberration curves of the optical lenses according to the first embodiment, the second embodiment, and the third embodiment of the present application is shown; Figure 7 is a schematic structural diagram of an optical lens according to Embodiment 4 of the present application; Figure 8 is a schematic structural diagram of an optical lens according to Embodiment 5 of the present application; Fig. 9 is a schematic structural diagram of an optical lens according to Embodiment 6 of the present application; Fig. 10A A schematic diagram of an axial chromatic aberration curve of the optical lens according to the fourth embodiment, the fifth embodiment and the sixth embodiment of the present application is shown; Fig. 10BSchematic diagrams of astigmatism curves of the optical lenses according to the fourth embodiment, the fifth embodiment, and the sixth embodiment of the present application are shown; Fig. 10C Schematic diagrams of distortion curves of the optical lenses according to the fourth embodiment, the fifth embodiment and the sixth embodiment of the present application are shown; Fig. 10D A schematic diagram of magnification chromatic aberration curves of the optical lenses according to the fourth embodiment, the fifth embodiment and the sixth embodiment of the present application is shown; Fig.11 is a schematic structural diagram of an optical lens according to Embodiment 7 of the present application; Fig.12 is a schematic structural diagram of an optical lens according to Embodiment 8 of the present application; Fig.13 is a schematic structural diagram of an optical lens according to Embodiment 9 of the present application; Fig.14A Schematic diagrams of axial chromatic aberration curves of the optical lenses according to the seventh embodiment, the eighth embodiment, and the ninth embodiment of the present application are shown; Fig. 14B Schematic diagrams of astigmatism curves of the optical lenses according to the seventh embodiment, the eighth embodiment and the ninth embodiment of the present application are shown; Fig. 14C Schematic diagrams of distortion curves of the optical lenses according to the seventh embodiment, the eighth embodiment and the ninth embodiment of the present application are shown; Fig.14D A schematic diagram of the magnification chromatic aberration curve of the optical lens according to the seventh embodiment, the eighth embodiment and the ninth embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0027] 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.

[0028] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. 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 only examples and are not drawn strictly to scale.

[0029] 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 type in the paraxial area can be judged according to the general method in this field, for example, the positive and negative R value (R refers to the radius of curvature of the paraxial area) is used to judge the concave and convex. In this article, the surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens. For the object 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 image 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.

[0030] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0031] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0032] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0033] According to one aspect of the present application, Figure 1 As shown, an optical lens is provided in one embodiment of the present application, which may include a lens barrel and a lens group and a spacing component contained in the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side along the optical axis, wherein the first lens has a negative optical focal length, and the object side surface and the image side surface of the first lens are concave surfaces, the second lens has a positive optical focal length, and the object side surface and the image side surface of the second lens are convex surfaces, the third lens has an optical focal length, and the object side surface of the third lens is a convex surface, the fourth lens has a positive optical focal length, and the object side surface and the image side surface of the fourth lens are convex surfaces, and the fifth lens has a negative optical focal length, and the object side surface and the image side surface of the fifth lens are concave surfaces.

[0034] The spacing assembly includes a first spacing element, a second spacing element, a third spacing element and a fourth spacing element. The first spacing element is placed on the image side of the first lens and in contact with the image side surface of the first lens, the second spacing element is placed on the image side of the second lens and in contact with the image side surface of the second lens, the third spacing element is placed on the image side of the third lens and in contact with the image side surface of the third lens, and the fourth spacing element is placed on the image side of the fourth lens and in contact with the image side surface of the fourth lens.

[0035] In particular, the optical lens satisfies: 6.20 mm<TD×tan(HFOV)<6.95 mm; and -10.50mm≤∑EP / EP01×R1<-5.75mm; Among them, ∑EP=EP01+EP12+EP23+EP34, EP01 is the distance between the object side of the lens barrel and the object side of the first spacer element, EP12 is the distance between the image side of the first spacer element and the object side of the second spacer element, EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element, EP34 is the distance between the image side of the third spacer element and the object side of the fourth spacer element, TD is the distance between the object side of the first lens and the image side of the fifth lens, HFOV is half of the maximum field of view of the optical lens, and R1 is the radius of curvature of the object side of the first lens.

[0036] Further preferably, 6.22 mm ≤ TD×tan(HFOV) ≤ 6.94 mm, -10.50 mm ≤ ∑ EP / EP01×R1 ≤ -5.79 mm.

[0037] It is worth noting that the optical lens in the above-mentioned embodiment of the present application is based on the restriction condition of 6.20mm<TD×tan(HFOV)<6.95mm, which reduces the length of the optical lens and realizes the miniaturization of the optical lens. Then, on the basis of ensuring a large field of view and a high amount of light input, the occurrence of large step differences is limited, thereby improving the assembly stability of the optical lens. Furthermore, based on the restriction condition of -10.50mm≤∑EP / EP01×R1<-5.75mm, the above-mentioned optical lens can also reasonably arrange the lenses and spacing elements, especially optimize the position and structure of the first lens, to ensure that the first lens does not protrude from the side of the lens barrel, reduce the pressure damage of the first lens, and improve the assembly yield. In addition, the first lens with negative optical power cooperates with the second lens with positive optical power, which can realize the reasonable distribution of the optical power of the optical system and effectively reduce the influence of chromatic aberration, thereby improving the imaging quality.

[0038] For example, Figure 2A The modulation transfer function curve of the optical lens is shown when TD×tan(HFOV)=6.50mm and ∑EP / EP01×R1=-11mm are satisfied at the same time. Figure 2B The modulation transfer function curve of the optical lens is shown when TD×tan(HFOV)=6.50mm and ∑EP / EP01×R1=-10mm are satisfied at the same time. Figure 2C The modulation transfer function curve of the optical lens is shown when TD×tan(HFOV)=6.50mm and ∑EP / EP01×R1=-6mm are satisfied at the same time. Figure 2D The modulation transfer function curve of the optical lens is shown when TD×tan(HFOV)=6.50mm and ∑EP / EP01×R1=-5mm are satisfied at the same time. Figure 2AAs shown, at this time, ∑EP / EP01×R1<-10.50mm and the object side of the first lens protrudes from the object side of the lens barrel, which leads to the positive field curvature and the imaging discreteness of the optical lens is aggravated; Figure 2B and Figure 2C As shown, at this time, -10.50mm≤∑EP / EP01×R1<-5.75mm, and the defocus curve meets the use requirements of the optical lens; Figure 2D As shown, at this time ∑EP / EP01×R1≥-5.75mm, the center angle corresponding to the effective radius of the first lens is relatively large, the processing difficulty of the first lens is increased and stray light is prone to occur, resulting in increased imaging discreteness of the optical lens.

[0039] Preferably, the optical lens satisfies: -1.05<(d0s-d1s) / R1<-0.15; wherein d0s is the inner diameter of the object side of the lens barrel, d1s is the inner diameter of the object side of the first spacer element, and R1 is the radius of curvature of the object side of the first lens.

[0040] More preferably, -1.02≤(d0s-d1s) / R1≤-0.19.

[0041] In this way, by controlling the value range of (d0s-d1s) / R1, it is possible to ensure that the optical lens has sufficient light intake, while avoiding excessive bending of the object side of the first lens, reducing the occurrence of first lens breakage during assembly, and improving assembly yield. In addition, by controlling the value range of (d0s-d1s) / R1, it is also possible to avoid excessive sag, reduce the difficulty of molding the first lens, and improve the molding yield of the first lens.

[0042] Preferably, the optical lens satisfies: 1.15<(EP01+CP1) / (CT1+T12)<2.20; wherein CP1 is the maximum thickness of the first spacer element, CT1 is the center thickness of the first lens, and T12 is the center thickness of the air gap between the image side surface of the first lens and the object side surface of the second lens.

[0043] Further preferably, 1.16≤(EP01+CP1) / (CT1+T12)≤2.18.

[0044] In this way, by adjusting the value of (EP01+CP1) / (CT1+T12), the edge thickness and center thickness of the first lens can be controlled to ensure the molding feasibility of the first lens. By adjusting the value of (EP01+CP1) / (CT1+T12), the center thickness of the air gap between the first lens and the second lens can also be controlled at the same time, which helps to reduce the sensitivity of the first lens and the second lens.

[0045] Preferably, the optical lens satisfies: 0.10≤(D1m-d1m) / R3<1.25; wherein D1m is the outer diameter of the image side of the first spacing element, d1m is the inner diameter of the image side of the first spacing element, and R3 is the radius of curvature of the object side of the second lens.

[0046] More preferably, 0.10≤(D1m-d1m) / R3≤1.23.

[0047] In this way, by controlling the difference between the outer diameter of the image side surface of the first spacing element and the inner diameter of the image side surface of the first spacing element, it is possible to ensure that there is sufficient bearing area between the first spacing element and the second lens, thereby ensuring the bearing stability between the first spacing element and the second lens, and improving the assembly stability of the optical lens. Based on the condition of 0.10≤(D1m-d1m) / R3≤1.23, the curvature radius of the object side surface of the second lens is controlled, the surface shape of the second lens can be adjusted, the processing difficulty of the second lens can be reduced, and the molding yield of the second lens can be improved.

[0048] Preferably, the optical lens satisfies: -3.20<f1 / d1m≤-1.40; wherein f1 is the effective focal length of the first lens, and d1m is the inner diameter of the image side surface of the first spacing element.

[0049] Further preferably, -3.19≤f1 / d1m≤-1.40.

[0050] In this way, by controlling the effective focal length of the first lens based on -3.20<f1 / d1m≤-1.40, the direction of light at the first lens can be controlled, effectively reducing the influence of chromatic aberration of the optical system and improving the imaging resolution. Similarly, by controlling the inner diameter of the image side of the first spacing element based on -3.20<f1 / d1m≤-1.40, it is helpful to block excess light and reduce stray light, thereby improving the imaging quality of the lens.

[0051] Preferably, the optical lens satisfies: 2.90mm<EP13 / (CT1+CT2)×f12<12.00mm; wherein EP13 is the distance between the image side surface of the first spacer element and the object side surface of the third spacer element, CT1 is the center thickness of the first lens, CT2 is the center thickness of the second lens, and f12 is the combined focal length of the first lens and the second lens.

[0052] Further preferably, 2.91 mm≤EP13 / (CT1+CT2)×f12≤11.96 mm.

[0053] Among them, EP12 is the distance between the image side of the first spacer element and the object side of the second spacer element, EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element, CP2 is the maximum thickness of the second spacer element, and EP13=EP12+EP23+CP2.

[0054] In this way, based on the value control of EP13 / (CT1+CT2)×f12, the refraction of light between the first lens and the second lens can be effectively controlled, the internal stray light can be reduced, the imaging quality can be improved, and the compactness between the first lens and the second lens can be ensured, which helps to realize the miniaturization of the optical lens.

[0055] Preferably, the optical lens satisfies: 0.30<(D1s-d1s) / (D2s-d2s)<1.70; wherein D1s is the outer diameter of the side surface of the first spacer element object, d1s is the inner diameter of the side surface of the first spacer element object, D2s is the outer diameter of the side surface of the second spacer element object, and d2s is the inner diameter of the side surface of the second spacer element object.

[0056] More preferably, 0.32≤(D1s-d1s) / (D2s-d2s)≤1.66.

[0057] In this way, by controlling the ratio of the inner and outer diameter difference of the object side of the first spacer element to the inner and outer diameter difference of the object side of the second spacer element, the assembly stability between the first spacer element, the second lens and the second spacer element can be improved and the lens reliability risk can be reduced.

[0058] Preferably, the optical lens satisfies: 1.30<d2s / CT2<2.40; wherein d2s is the inner diameter of the side surface of the second spacer element, and CT2 is the center thickness of the second lens.

[0059] Further preferably, 1.33≤d2s / CT2≤2.38.

[0060] In this way, by controlling the inner diameter of the side surface of the second spacer element and the center thickness of the second lens, while ensuring that the second lens can be processed and formed, it helps to improve the assembly stability of the front-end lens, improve the low yield problem caused by the matching amount, ensure the assembly stability of the lens group, and improve the assembly yield of the optical lens.

[0061] Preferably, the optical lens satisfies: -5.60<R4 / (D2s-d2s)<-0.85; wherein R4 is the radius of curvature of the image side of the second lens, D2s is the outer diameter of the object side of the second spacer element, and d2s is the inner diameter of the object side of the second spacer element.

[0062] More preferably, -5.59≤R4 / (D2s-d2s)≤-0.86.

[0063] In this way, the curvature radius of the image side of the second lens determines the surface trend of the second lens. By controlling the outer diameter of the image side of the second spacer element and the inner diameter of the image side of the second spacer element, the shielding effect of the second spacer element between the second lens and the third lens can be ensured, the shielding area can be increased, and the reflected stray light between the second lens and the third lens can be reduced.

[0064] Preferably, the optical lens satisfies: 0.20<CT3 / CP3<0.75; wherein CT3 is the center thickness of the third lens, and CP3 is the maximum thickness of the third spacing element.

[0065] Further preferably, 0.24≤CT3 / CP3≤0.74.

[0066] In this way, by controlling the center thickness of the third lens and the maximum thickness of the third spacer element, the edge thickness of the third lens can be controlled and the overall thickness uniformity of the third lens can be improved, which is not only beneficial to the molding of the third lens, but also can improve the assembly stability and imaging quality of the optical lens.

[0067] Preferably, the optical lens satisfies: 0.80<(D3s-d3s) / CP3<3.05; wherein D3s is the outer diameter of the side surface of the third spacer element, d3s is the inner diameter of the side surface of the third spacer element, and CP3 is the maximum thickness of the third spacer element.

[0068] Further preferably, 0.84≤(D3s-d3s) / CP3≤3.01.

[0069] In this way, by controlling the outer diameter of the side surface of the third spacer element, the inner diameter of the side surface of the third spacer element, and the maximum thickness of the third spacer element, the third lens can be placed in a better supporting position, which helps to improve the assembly stability of the lens group and reduce the influence of the high temperature and high humidity environment on the external field curvature. In addition, under the premise that the third lens and the fourth lens can be molded, by controlling the value of (D3s-d3s) / CP3, the thickness of the air gap between the third lens and the fourth lens can also be controlled, and then the optical power of the third lens and the fourth lens in the optical system can be reasonably allocated, so that the imaging quality of the middle section of the optical system is uniform and stable, and then the problem of peak drop of the external field during assembly is improved, and the lens performance is improved.

[0070] Preferably, the optical lens satisfies: 0.65<CP3 / EP23<2.80; wherein CP3 is the maximum thickness of the third spacer element, and EP23 is the distance between the image side surface of the second spacer element and the object side surface of the third spacer element.

[0071] Further preferably, 0.67≤CP3 / EP23≤2.78.

[0072] In this way, by controlling the maximum thickness of the third spacer element and the distance between the image side of the second spacer element and the object side of the third spacer element, the edge thickness of the third lens can be controlled, which not only helps to shape the third lens, but also can avoid excessive internal reflected light due to excessive edge thickness of the third lens, which is beneficial to the enhancement and improvement of shooting effects.

[0073] Preferably, the optical lens satisfies: 0.40<(D4m-d4m) / CT4<2.15; wherein D4m is the outer diameter of the image side of the fourth spacer element, d4m is the inner diameter of the image side of the fourth spacer element, and CT4 is the center thickness of the fourth lens.

[0074] Further preferably, 0.41≤(D4m-d4m) / CT4≤2.13.

[0075] In this way, by controlling the ratio of the inner and outer diameter difference of the image side surface of the fourth spacer element to the center thickness of the fourth lens, the thickness of the fourth spacer element can be well controlled and the strength of the fourth lens can be improved. Similarly, by adjusting the inner and outer diameter difference of the image side surface of the fourth spacer element based on the relationship of 0.41≤(D4m-d4m) / CT4≤2.13, the contact area between the fourth spacer element and the fourth lens can be increased, thereby improving the assembly stability.

[0076] Preferably, the optical lens satisfies: 1.85<CT4 / EP34×n4<5.00; wherein CT4 is the center thickness of the fourth lens, EP34 is the distance between the image side surface of the third spacer element and the object side surface of the fourth spacer element, and n4 is the refractive index of the fourth lens.

[0077] Further preferably, 1.87≤CT4 / EP34×n4≤4.97.

[0078] In this way, the molding difficulty of the fourth lens can be reduced, while the focusing effect of the fourth lens can be improved, thereby improving the imaging quality of the optical lens.

[0079] Preferably, the optical lens satisfies: -2.75<(D0m-D4m) / f5<-0.80; wherein D0m is the outer diameter of the image side of the lens barrel, D4m is the outer diameter of the image side of the fourth spacing element, and f5 is the effective focal length of the fifth lens.

[0080] More preferably, -2.73≤(D0m-D4m) / f5≤-0.83.

[0081] In this way, by controlling the outer diameter of the image side of the lens barrel, the outer diameter of the image side of the fourth spacer element and the effective focal length of the fifth lens, the outer diameter of the lens can be effectively controlled, and the limit process during lens production can be improved. By using the restriction condition of -2.73≤(D0m-D4m) / f5≤-0.83, the thickness of the lens barrel can be controlled and the overall volume of the lens can be reduced, thereby improving the stability of the lens assembly.

[0082] Preferably, the optical lens satisfies: 0.10≤CP3 / |R7-R6|≤1.35; wherein CP3 is the maximum thickness of the third spacing element, R7 is the radius of curvature of the object side of the fourth lens, and R6 is the radius of curvature of the image side of the third lens.

[0083] In this way, by controlling the maximum thickness of the third spacer element, the curvature radius of the object side of the fourth lens, and the curvature radius of the image side of the third lens, the production cost of the optical lens can be reduced, and the stability of the optical lens assembly can be improved. Through the restriction condition of 0.10≤CP3 / |R7-R6|≤1.35, the adaptability of the curvature radius of the object side of the fourth lens and the curvature radius of the image side of the third lens can also be improved, ensuring the refraction effect of light in the air gap between the third lens and the fourth lens, and reducing internal reflection stray light.

[0084] Preferably, the optical lens satisfies: 0.95<d0s / f<1.85; wherein d0s is the inner diameter of the object side of the lens barrel, and f is the effective focal length of the optical lens.

[0085] More preferably, 0.96≤d0s / f≤1.83.

[0086] In this way, by controlling the inner diameter of the object side of the lens barrel and the effective focal length of the optical lens, the amount of light entering the optical lens can be ensured and the imaging quality can be improved.

[0087] It should be noted that those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of spacer elements constituting the optical lens can be changed to obtain the various results and advantages described in this specification, and the present application does not specifically limit this. For example, as required, the optical imaging lens may also include other numbers of spacer elements different from those described in the above embodiments.

[0088] Some specific but non-restrictive embodiments of the above-mentioned embodiments of the present application are described in more detail below with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ represents the object surface of the optical lens, STO represents the surface of the aperture, S1 represents the object side surface of the first lens E1, S2 represents the image side surface of the first lens E1, S3 represents the object side surface of the second lens E2, S4 represents the image side surface of the second lens E2, S5 represents the object side surface of the third lens E3, S6 represents the image side surface of the third lens E3, S7 represents the object side surface of the fourth lens E4, S8 represents the image side surface of the fourth lens E4, S9 represents the object side surface of the fifth lens E5, and S10 represents the image side surface of the fifth lens E5. In addition, Aj represents the j-th order aspheric coefficient, j=4, 6, 8, 10, 12, 14, 16, 18, 20.

[0089] Embodiment 1 like Figure 3 As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a negative focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a concave surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0090] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness are both millimeters (mm).

[0091] Table 1: Basic optical parameters of the optical lens of Example 1 In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape of each aspherical lens is x The following aspheric formulas can be used but are not limited to: ; in, x The aspheric surface is at a height of h When the position is , the distance vector height from the vertex of the aspherical surface; c is the paraxial curvature of the aspheric surface, c =1 / R (i.e., paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the cone coefficient; Ai Aspheric i Table 2 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspheric mirror surfaces S1 to S10 in the first embodiment.

[0092] Table 2: Aspheric coefficients of the optical lens of Example 1 Embodiment 2 like Figure 4 As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a negative focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a concave surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0093] It is worth noting that compared with the above-mentioned embodiment 1, the optical lens of the second embodiment has the same white object structure, that is, the basic optical parameter table of the optical lens of the second embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. However, the optical lens of the second embodiment has a different black object structure from the optical lens of the first embodiment, that is, the difference between the second embodiment and the first embodiment is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different.

[0094] Specifically, the values ​​of the various related structural parameters in the second embodiment and the above-mentioned first embodiment are respectively shown in Table 8 below, and the multiple black object parameters specifically include: the distance EP01 between the object side of the lens barrel P0 and the object side of the first spacing element P1, the distance EP12 between the image side of the first spacing element P1 and the object side of the second spacing element P2, the distance EP23 between the image side of the second spacing element P2 and the object side of the third spacing element P3, the distance EP34 between the image side of the third spacing element P3 and the object side of the fourth spacing element P4, the maximum thickness CP1 of the first spacing element P1, the maximum thickness CP2 of the second spacing element P2, the maximum thickness CP3 of the third spacing element P3, and the maximum thickness CP4 of the fourth spacing element P4. Large thickness CP4, the inner diameter d1s of the object side of the first spacing element P1, the inner diameter d1m of the image side of the first spacing element P1, the outer diameter D1s of the object side of the first spacing element P1, the outer diameter D1m of the image side of the first spacing element P1, the inner diameter d2s of the object side of the second spacing element P2, the outer diameter D2s of the object side of the second spacing element P2, the inner diameter d3s of the object side of the third spacing element P3, the inner diameter d4m of the image side of the fourth spacing element P4, the outer diameter D4m of the image side of the fourth spacing element P4, the inner diameter d0s of the object side of the lens barrel P0, the outer diameter D0m of the image side of the lens barrel P0, the spacing EP13 between the image side of the first spacing element P1 and the object side of the third spacing element P3, and the outer diameter D3s of the object side of the third spacing element P3.

[0095] Embodiment 3 like Figure 5As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a negative focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a concave surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0096] In this embodiment, the spacing assembly further comprises a third auxiliary spacing element P3b and a fourth auxiliary spacing element P4b, wherein the third auxiliary spacing element P3b is disposed on the image side of the third spacing element P3 and contacts the image side of the third spacing element P3, and the fourth auxiliary spacing element P4b is disposed on the image side of the fourth spacing element P4 and contacts the image side of the fourth spacing element P4.

[0097] It is worth noting that, compared with the above-mentioned embodiment 1, the optical lens of the embodiment 3 has the same white object structure, that is, the basic optical parameter table of the optical lens of the embodiment 3 is the same as Table 1, and the aspheric coefficient table is the same as Table 2. However, the optical lens of the embodiment 3 has a different black object structure from the optical lens of the above-mentioned embodiment 1, that is, the difference between the embodiment 3 and the above-mentioned embodiment 1 is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the values ​​of the various related structural parameters in the embodiment 3 are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the above-mentioned embodiment 2, which will not be repeated here.

[0098] After simulation test, the axial chromatic aberration curves of the optical lenses in Embodiment 1, Embodiment 2 and Embodiment 3 are as follows: Fig. 6A As shown, it indicates the degree of deviation of the focal point of light of different wavelengths after passing through the optical lens; the astigmatism curves of the optical lens in the first embodiment, the second embodiment and the third embodiment are as shown in Figure 6BAs shown, it represents the degree of meridian image curvature and sagittal image curvature; the distortion curves of the optical lens in Embodiment 1, Embodiment 2 and Embodiment 3 are as shown Figure 6C As shown; the magnification chromatic aberration curves of the optical lenses in Embodiment 1, Embodiment 2 and Embodiment 3 are as shown Fig.6D As shown. Fig. 6A , Figure 6B , Figure 6C and Fig.6D It can be seen that the optical lenses in the first embodiment, the second embodiment and the third embodiment can all achieve good imaging quality.

[0099] Embodiment 4 like Figure 7 As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a positive focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a convex surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0100] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature and thickness are both millimeters (mm).

[0101] Table 3: Basic optical parameters of the optical lens of Example 4 In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape of each aspherical lens can be defined by the aspherical surface formula given in the above embodiment 1. Table 4 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of each aspherical mirror surface S1 to S10 that can be used in embodiment 4.

[0102] Table 4: Aspheric coefficients of the optical lens of Example 4 Embodiment 5 like Figure 8 As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a positive focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a convex surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0103] It is worth noting that, compared with the above-mentioned fourth embodiment, the optical lens of the fifth embodiment has the same white object structure, that is, the basic optical parameter table of the optical lens of the fifth embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical lens of the fifth embodiment has a different black object structure from the optical lens of the fourth embodiment, that is, the difference between the fifth embodiment and the fourth embodiment is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the values ​​of the various related structural parameters in the fifth embodiment are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the second embodiment above, which will not be repeated here.

[0104] Embodiment 6 like Fig. 9 As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a positive focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a convex surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0105] It is worth noting that, compared with the above-mentioned fourth embodiment, the optical lens of the sixth embodiment has the same white object structure, that is, the basic optical parameter table of the optical lens of the sixth embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical lens of the sixth embodiment has a different black object structure from the optical lens of the fourth embodiment, that is, the difference between the sixth embodiment and the fourth embodiment is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the values ​​of the various related structural parameters in the sixth embodiment are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the second embodiment above, which will not be repeated here.

[0106] After simulation test, the axial chromatic aberration curves of the optical lenses in the fourth, fifth and sixth embodiments are as follows: Fig. 10A As shown, it indicates the degree of deviation of the focal point of light of different wavelengths after passing through the optical lens; the astigmatism curves of the optical lens in the fourth embodiment, the fifth embodiment and the sixth embodiment are as shown in Fig. 10B As shown, it represents the degree of meridian image curvature and sagittal image curvature; the distortion curves of the optical lens in the fourth embodiment, the fifth embodiment and the sixth embodiment are as shown Fig. 10C As shown; the magnification chromatic aberration curves of the optical lenses in the fourth embodiment, the fifth embodiment and the sixth embodiment are as shown Fig. 10D As shown. Fig. 10A , Fig. 10B , Fig. 10C and Fig. 10D It can be seen that the optical lenses in the fourth embodiment, the fifth embodiment and the sixth embodiment can all achieve good imaging quality.

[0107] Embodiment 7 like Fig.11 As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a negative focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a concave surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0108] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Example 7, wherein the units of the radius of curvature and thickness are both millimeters (mm).

[0109] Table 5: Aspheric coefficients of the optical lens of Example 7 In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape of each aspherical lens can be defined by the aspherical surface formula given in the above embodiment 1. The following Table 6 gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of each aspherical mirror surface S1 to S10 that can be used in embodiment 7.

[0110] Table 6: Aspheric coefficients of the optical lens of Example 7 Embodiment 8 like Fig.12 As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a negative focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a concave surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0111] It is worth noting that, compared with the above-mentioned embodiment 7, the optical lens of the embodiment 8 has the same white object structure, that is, the basic optical parameter table of the optical lens of the embodiment 8 is the same as Table 5, and the aspheric coefficient table is the same as Table 6. However, the optical lens of the embodiment 8 has a different black object structure from the optical lens of the embodiment 7, that is, the difference between the embodiment 8 and the embodiment 7 is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the values ​​of the various related structural parameters in the embodiment 8 are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the above-mentioned embodiment 2, which will not be repeated here.

[0112] Embodiment 9 like Fig.13As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0. The lens group comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1 has a negative focal power, and the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive focal power, and the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a negative focal power, and the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a concave surface, the fourth lens E4 has a positive focal power, and the object side surface and the image side surface of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative focal power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacing component includes a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4. The first spacing element P1 is disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, the second spacing element P2 is disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, the third spacing element P3 is disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and the fourth spacing element P4 is disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4.

[0113] In this embodiment, one of the spacer elements is a fourth auxiliary spacer element P4b, which is disposed on the image side of the fourth spacer element P4 and in contact with the image side of the fourth spacer element P4.

[0114] It is worth noting that, compared with the above-mentioned embodiment 7, the optical lens of the embodiment 9 has the same white object structure, that is, the basic optical parameter table of the optical lens of the embodiment 9 is the same as Table 5, and the aspheric coefficient table is the same as Table 6. However, the optical lens of the embodiment 9 has a different black object structure from the optical lens of the embodiment 7, that is, the difference between the embodiment 9 and the embodiment 7 is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the values ​​of the various related structural parameters in the embodiment 9 are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the above-mentioned embodiment 2, which will not be repeated here.

[0115] After simulation test, the axial chromatic aberration curves of the optical lenses in Embodiment 7, Embodiment 8 and Embodiment 9 are as follows: Fig.14A As shown, it indicates the degree of deviation of the focal point of light of different wavelengths after passing through the optical lens; the astigmatism curves of the optical lens in the seventh embodiment, the eighth embodiment and the ninth embodiment are as shown in Fig. 14B As shown, it represents the degree of meridian image curvature and sagittal image curvature; the distortion curves of the optical lenses in Embodiment 7, Embodiment 8 and Embodiment 9 are as shown Fig. 14C As shown; the magnification chromatic aberration curves of the optical lenses in the seventh embodiment, the eighth embodiment and the ninth embodiment are as shown Fig.14D As shown. Fig.14A , Fig. 14B , Fig. 14C and Fig.14D It can be seen that the optical lenses in the seventh embodiment, the eighth embodiment and the ninth embodiment can all achieve good imaging quality.

[0116] In summary, in Examples 1 to 9, half the diagonal length of the effective pixel area on the imaging plane ImgH, half the maximum field of view angle HFOV of the optical lens, the aperture coefficient Fno, the effective focal length f of the optical lens, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the combined focal length f12 of the first lens and the second lens are as shown in Table 7.

[0117] Table 7: System optical parameters of optical lens In addition, the black object structure parameters of the optical lens in Examples 1 to 9 are specifically shown in Table 8.

[0118] Table 8: Black object structure parameter table of optical lens In summary, the optical lenses in Embodiments 1 to 9 satisfy the relationship shown in Table 9, as shown in Table 9.

[0119] Table 9: Relationships satisfied by optical lenses It is worth mentioning that according to one aspect of the present application, an embodiment of the present application further provides a camera module, which may include the above-mentioned optical lens and a photosensitive element, and the photosensitive element is arranged on the image side of the optical lens to form an image. It is understandable that the photosensitive element mentioned in the present application may be implemented as a charge coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS), but is not limited to this, and the present application will not elaborate on this.

[0120] In addition, according to another aspect of the present application, an embodiment of the present application further provides an electronic device, which may include a camera module and a processor configured as described above, wherein the camera module is communicatively connected to the processor for acquiring image data and inputting the image data into the processor for processing. It is understood that the electronic device mentioned in the present application may be, but is not limited to, implemented as a device such as a mobile phone equipped with the camera module, and the present application will not elaborate on this.

[0121] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0122] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An optical lens, characterized in that: The invention comprises a lens barrel, a lens group and a spacer assembly contained in the lens barrel; the lens group comprises the following lens groups arranged in sequence from the object side to the image side along the optical axis: The first lens has negative optical power, and its object side surface and image side surface are concave; The second lens has positive power, and its object side surface and image side surface are convex; The third lens has optical power and a convex object side surface; The fourth lens has positive power, and its object-side surface and image-side surface are convex; The fifth lens has negative power, and its object side surface and image side surface are concave; The spacer assembly comprises a first spacer element, a second spacer element, a third spacer element and a fourth spacer element, the first spacer element is disposed on the image side of the first lens and in contact with the image side surface of the first lens, the second spacer element is disposed on the image side of the second lens and in contact with the image side surface of the second lens, the third spacer element is disposed on the image side of the third lens and in contact with the image side surface of the third lens, and the fourth spacer element is disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens; The optical lens meets the following requirements: 6.20 mm<TD×tan(HFOV)<6.95 mm; and -10.50mm≤∑EP / EP01×R1<-5.75mm; Among them, ∑EP=EP01+EP12+EP23+EP34, EP01 is the distance between the object side of the lens barrel and the object side of the first spacer element, EP12 is the distance between the image side of the first spacer element and the object side of the second spacer element, EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element, EP34 is the distance between the image side of the third spacer element and the object side of the fourth spacer element, TD is the distance between the object side of the first lens and the image side of the fifth lens, HFOV is half of the maximum field of view of the optical lens, and R1 is the radius of curvature of the object side of the first lens.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies: -1.05<(d0s-d1s) / R1<-0.15; Wherein, d0s is the inner diameter of the object side of the lens barrel, d1s is the inner diameter of the object side of the first spacing element, and R1 is the radius of curvature of the object side of the first lens.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 1.15<(EP01+CP1) / (CT1+T12) <2.20; Among them, CP1 is the maximum thickness of the first spacer element, CT1 is the center thickness of the first lens, and T12 is the center thickness of the air gap between the image side surface of the first lens and the object side surface of the second lens.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 0.10≤(D1m-d1m) / R3<1.25; Wherein, D1m is the outer diameter of the image side surface of the first spacing element, d1m is the inner diameter of the image side surface of the first spacing element, and R3 is the radius of curvature of the object side surface of the second lens.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies: -3.20<f1 / d1m≤-1.40; Wherein, f1 is the effective focal length of the first lens, and d1m is the inner diameter of the image side surface of the first spacing element.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 2.90mm<EP13 / (CT1+CT2)×f12<12.00mm; Among them, EP13 is the distance between the image side of the first spacer element and the object side of the third spacer element, CT1 is the center thickness of the first lens, CT2 is the center thickness of the second lens, and f12 is the combined focal length of the first lens and the second lens.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 0.30<(D1s-d1s) / (D2s-d2s)<1.70; Wherein, D1s is the outer diameter of the side surface of the first spacer element, d1s is the inner diameter of the side surface of the first spacer element, D2s is the outer diameter of the side surface of the second spacer element, and d2s is the inner diameter of the side surface of the second spacer element.

8. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 1.30<d2s / CT2<2.40; Wherein d2s is the inner diameter of the side surface of the second spacer element, and CT2 is the center thickness of the second lens.

9. The optical lens according to claim 1, characterized in that: The optical lens satisfies: -5.60<R4 / (D2s-d2s)<-0.85; Among them, R4 is the curvature radius of the image side of the second lens, D2s is the outer diameter of the object side of the second spacer element, and d2s is the inner diameter of the object side of the second spacer element.

10. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 0.20<CT3 / CP3<0.75; Wherein, CT3 is the center thickness of the third lens, and CP3 is the maximum thickness of the third spacing element.

11. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 0.80<(D3s-d3s) / CP3<3.05; Wherein, D3s is the outer diameter of the side surface of the third spacer element, d3s is the inner diameter of the side surface of the third spacer element, and CP3 is the maximum thickness of the third spacer element.

12. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 0.65<CP3 / EP23<2.80; Wherein, CP3 is the maximum thickness of the third spacing element.

13. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 0.40<(D4m-d4m) / CT4<2.15; Wherein, D4m is the outer diameter of the image side surface of the fourth spacing element, d4m is the inner diameter of the image side surface of the fourth spacing element, and CT4 is the center thickness of the fourth lens.

14. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 1.85<CT4 / EP34×n4<5.00; Wherein, CT4 is the center thickness of the fourth lens.

15. The optical lens according to claim 1, characterized in that: The optical lens satisfies: -2.75<(D0m-D4m) / f5<-0.80; Wherein, D0m is the outer diameter of the image side of the lens barrel, D4m is the outer diameter of the image side of the fourth spacing element, and f5 is the effective focal length of the fifth lens.

16. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 0.10≤CP3 / |R7-R6|≤1.35; Among them, CP3 is the maximum thickness of the third spacing element, R7 is the curvature radius of the object side of the fourth lens, and R6 is the curvature radius of the image side of the third lens.

17. The optical lens according to claim 1, characterized in that: The optical lens satisfies: 0.95<d0s / f<1.85; Wherein, d0s is the inner diameter of the object side of the lens barrel, and f is the effective focal length of the optical lens.

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