Optical lens

Abstract

The present application provides an optical lens, which includes a lens barrel, a lens group and a spacer component accommodated within the lens barrel; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens having a negative optical power, with the object side surface and the image side surface being concave surfaces; a second lens having a positive optical power, with the object side surface and the image side surface being convex surfaces; a third lens having an optical power, with the object side surface being a convex surface; a fourth lens having a positive optical power, with the object side surface and the image side surface being convex surfaces; a fifth lens having a negative optical power, with the object side surface and the image side surface being concave surfaces; the optical lens satisfies: 6.20 mm < TD × tan(HFOV) < 6.95 mm; and -10.50 mm ≤ ∑EP / EP01 × R1 < -5.75 mm.

Description

Technical Field

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

[0002] In recent years, with the rise of smart phones, the proportion of the mobile phone camera function in the use of mobile phones has become increasingly large. With the development of technology, users have higher and higher requirements for the camera effects of mobile phones in different scenarios, and the camera quality of mobile phones has gradually become an important indicator for users to choose mobile phones.

[0003] Meanwhile, as the image plane used by mobile phone lenses becomes larger and larger, the lenses used in mobile phones require a larger field of view angle and light incident amount to ensure imaging quality. In order to achieve the purpose of increasing the field of view angle and light incident amount, during the design of the lenses in the lens, the difference in the optical effective diameter between different lenses is also getting larger and larger, and then a large step difference appears, resulting in a decrease in the assembly stability.

[0004] It can be seen that the lenses used in mobile phones at the present stage are difficult to balance imaging quality and assembly stability. Summary of the Invention

[0005] An advantage of the present application is to provide an optical lens, which can solve the problem that traditional fixed-focus lenses cannot balance 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 accommodated in the lens barrel; the lens group includes, arranged in sequence from the object side to the image side along the optical axis:

[0007] A first lens, having a negative optical power, with the object side and the image side being concave surfaces;

[0008] A second lens, having a positive optical power, with the object side and the image side being convex surfaces;

[0009] A third lens, having an optical power, with the object side being a convex surface;

[0010] A fourth lens, having a positive optical power, with the object side and the image side being convex surfaces;

[0011] A fifth lens, having a negative optical power, with the object side and the image side being concave surfaces;

[0012] The spacer assembly includes 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 contacts the image side surface of the first lens. The second spacer element is disposed on the image side of the second lens and contacts the image side surface of the second lens. The third spacer element is disposed on the image side of the third lens and contacts the image side surface of the third lens. The fourth spacer element is disposed on the image side of the fourth lens and contacts the image side surface of the fourth lens;

[0013] The optical lens satisfies:

[0014] 6.20 mm < TD × tan(HFOV) < 6.95 mm; and

[0015] -10.50 mm ≤ ∑EP / EP01 × R1 < -5.75 mm;

[0016] wherein, ∑EP = EP01 + EP12 + EP23 + EP34, EP01 is the distance between the object side surface of the lens barrel and the object side surface of the first spacer element, EP12 is the distance between the image side surface of the first spacer element and the object side surface of the second spacer element, EP23 is the distance between the image side surface of the second spacer element and the object side surface of the third spacer element, EP34 is the distance between the image side surface of the third spacer element and the object side surface of the fourth spacer element, TD is the distance between the object side surface of the first lens and the image side surface of the fifth lens, HFOV is half of the maximum field of view angle of the optical lens, and R1 is the curvature radius of the object side surface of the first lens.

[0017] In some embodiments of the present application, the optical lens satisfies: -1.05 < (d0s - d1s) / R1 < -0.15;

[0018] wherein, d0s is the inner diameter of the object side surface of the lens barrel, d1s is the inner diameter of the object side surface of the first spacer element, and R1 is the curvature radius of the object side surface of the first lens.

[0019] In some embodiments of the present application, the optical lens satisfies: 1.15 < (EP01 + CP1) / (CT1 + T12) < 2.20;

[0020] wherein, CP1 is the maximum thickness of the first spacer element, CT1 is the central thickness of the first lens, and T12 is the central thickness of the air gap between the image side surface of the first lens and the object side surface of the second lens.

[0021] In some embodiments of the present application, the optical lens satisfies: 0.10 ≤ (D1m - d1m) / R3 < 1.25;

[0022] Wherein, D1m is the outer diameter of the image side surface of the first spacer element, d1m is the inner diameter of the image side surface of the first spacer element, and R3 is the curvature radius of the object side surface of the second lens.

[0023] In some embodiments of the present application, the optical lens satisfies: -3.20 < f1 / d1m ≤ -1.40;

[0024] 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 spacer element.

[0025] In some embodiments of the present application, the optical lens satisfies: 2.90 mm < EP13 / (CT1 + CT2) × f12 < 12.00 mm;

[0026] 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 central thickness of the first lens, CT2 is the central thickness of the second lens, and f12 is the combined focal length of the first lens and the second lens.

[0027] In some embodiments of the present application, the optical lens satisfies: 0.30 < (D1s - d1s) / (D2s - d2s) < 1.70;

[0028] Wherein, D1s is the outer diameter of the object side surface of the first spacer element, d1s is the inner diameter of the object side surface of the first spacer element, D2s is the outer diameter of the object side surface of the second spacer element, and d2s is the inner diameter of the object side surface of the second spacer element.

[0029] In some embodiments of the present application, the optical lens satisfies: 1.30 < d2s / CT2 < 2.40;

[0030] Where d2s is the inner diameter of the object side surface of the second spacer element, and CT2 is the central thickness of the second lens.

[0031] In some embodiments of the present application, the optical lens satisfies: -5.60 < R4 / (D2s - d2s) < -0.85;

[0032] Wherein, R4 is the curvature radius of the image side surface of the second lens, D2s is the outer diameter of the object side surface of the second spacer element, and d2s is the inner diameter of the object side surface of the second spacer element.

[0033] In some embodiments of the present application, the optical lens satisfies: 0.20 < CT3 / CP3 < 0.75;

[0034] Wherein, CT3 is the central thickness of the third lens, and CP3 is the maximum thickness of the third spacer element.

[0035] In some embodiments of the present application, the optical lens satisfies: 0.80 < (D3s - d3s) / CP3 < 3.05;

[0036] Wherein, D3s is the outer diameter of the object side surface of the third spacer element, d3s is the inner diameter of the object side surface of the third spacer element, and CP3 is the maximum thickness of the third spacer element.

[0037] In some embodiments of the present application, the optical lens satisfies: 0.65 < CP3 / EP23 < 2.80;

[0038] Wherein, CP3 is the maximum thickness of the third spacer element.

[0039] In some embodiments of the present application, the optical lens satisfies: 0.40 < (D4m - d4m) / CT4 < 2.15;

[0040] Wherein, D4m is the outer diameter of the image side surface of the fourth spacer element, d4m is the inner diameter of the image side surface of the fourth spacer element, and CT4 is the central thickness of the fourth lens.

[0041] In some embodiments of the present application, the optical lens satisfies: 1.85 < CT4 / EP34 × n4 < 5.00;

[0042] Wherein, CT4 is the central thickness of the fourth lens.

[0043] In some embodiments of the present application, the optical lens satisfies: -2.75 < (D0m - D4m) / f5 < -0.80;

[0044] Wherein, D0m is the outer diameter of the image side surface of the lens barrel, D4m is the outer diameter of the image side surface of the fourth spacer element, and f5 is the effective focal length of the fifth lens.

[0045] In some embodiments of the present application, the optical lens satisfies: 0.10 ≤ CP3 / |R7 - R6| ≤ 1.35;

[0046] Wherein, CP3 is the maximum thickness of the third spacer element, R7 is the curvature radius of the object side surface of the fourth lens, and R6 is the curvature radius of the image side surface of the third lens.

[0047] In some embodiments of the present application, the optical lens satisfies: 0.95 < d0s / f < 1.85;

[0048] Wherein, d0s is the inner diameter of the object side surface of the lens barrel, and f is the effective focal length of the optical lens.

[0049] In summary, based on the limitation condition of 6.20mm < TD×tan(HFOV) < 6.95mm, the optical lens of the present application reduces the length of the optical lens, realizes the miniaturization of the optical lens, and then limits the occurrence of large step differences on the basis of ensuring a large field of view angle and a high light input amount, improving the assembly stability of the optical lens.

[0050] Furthermore, based on the limitation condition of -10.50mm ≤ ∑EP / EP01×R1 < -5.75mm, the optical lens of the present application can reasonably arrange each lens and spacer element, especially optimize the position and structure of the first lens, which can ensure that the first lens does not protrude from the object side of the lens barrel, reduce the bruising 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 brought by chromatic aberration, improving the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic diagram of the structural parameters of an optical lens according to an embodiment of the present application;

[0052] Figure 2A shows the modulation transfer function curve of the optical lens when TD×tan(HFOV) = 6.50mm and ∑EP / EP01×R1 = -11mm are satisfied simultaneously;

[0053] Figure 2B shows the modulation transfer function curve of the optical lens when TD×tan(HFOV) = 6.50mm and ∑EP / EP01×R1 = -10mm are satisfied simultaneously;

[0054] Figure 2C shows the modulation transfer function curve of the optical lens when TD×tan(HFOV) = 6.50mm and ∑EP / EP01×R1 = -6mm are satisfied simultaneously;

[0055] Figure 2D shows the modulation transfer function curve of the optical lens when TD×tan(HFOV) = 6.50mm and ∑EP / EP01×R1 = -5mm are satisfied simultaneously;

[0056] Figure 3 is a schematic structural diagram of the optical lens according to Embodiment 1 of the present application;

[0057] Figure 4 is a schematic structural diagram of the optical lens according to Embodiment 2 of the present application;

[0058] Figure 5 is a schematic structural diagram of the optical lens according to Embodiment 3 of the present application;

[0059] Figure 6A Shows a schematic diagram of the axial chromatic aberration curve of the optical lens according to the first, second, and third embodiments of the present application;

[0060] Figure 6B Shows a schematic diagram of the astigmatism curve of the optical lens according to the first, second, and third embodiments of the present application;

[0061] Figure 6C Shows a schematic diagram of the distortion curve of the optical lens according to the first, second, and third embodiments of the present application;

[0062] Figure 6D Shows a schematic diagram of the lateral chromatic aberration curve of the optical lens according to the first, second, and third embodiments of the present application;

[0063] Figure 7 Is a schematic structural diagram of the optical lens according to the fourth embodiment of the present application;

[0064] Figure 8 Is a schematic structural diagram of the optical lens according to the fifth embodiment of the present application;

[0065] Figure 9 Is a schematic structural diagram of the optical lens according to the sixth embodiment of the present application;

[0066] Figure 10A Shows a schematic diagram of the axial chromatic aberration curve of the optical lens according to the fourth, fifth, and sixth embodiments of the present application;

[0067] Figure 10B Shows a schematic diagram of the astigmatism curve of the optical lens according to the fourth, fifth, and sixth embodiments of the present application;

[0068] Figure 10C Shows a schematic diagram of the distortion curve of the optical lens according to the fourth, fifth, and sixth embodiments of the present application;

[0069] Figure 10D Shows a schematic diagram of the lateral chromatic aberration curve of the optical lens according to the fourth, fifth, and sixth embodiments of the present application;

[0070] Figure 11 Is a schematic structural diagram of the optical lens according to the seventh embodiment of the present application;

[0071] Figure 12 Is a schematic structural diagram of the optical lens according to the eighth embodiment of the present application;

[0072] Figure 13 It is a schematic structural diagram of an optical lens according to Embodiment 9 of the present application;

[0073] Figure 14A It shows a schematic diagram of the axial chromatic aberration curve of the optical lens according to the above-mentioned Embodiment 7, the above-mentioned Embodiment 8, and the above-mentioned Embodiment 9 of the present application;

[0074] Figure 14B It shows a schematic diagram of the astigmatism curve of the optical lens according to the above-mentioned Embodiment 7, the above-mentioned Embodiment 8, and the above-mentioned Embodiment 9 of the present application;

[0075] Figure 14C It shows a schematic diagram of the distortion curve of the optical lens according to the above-mentioned Embodiment 7, the above-mentioned Embodiment 8, and the above-mentioned Embodiment 9 of the present application;

[0076] Figure 14D It shows a schematic diagram of the longitudinal chromatic aberration curve of the optical lens according to the above-mentioned Embodiment 7, the above-mentioned Embodiment 8, and the above-mentioned Embodiment 9 of the present application. Detailed Embodiments

[0077] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0078] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0079] In the drawings, for ease of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only for illustration and are not drawn strictly to scale.

[0080] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made according to the general methods in the art. For example, the convexity and concavity can be judged by the positive and negative values of the R value (R refers to the radius of curvature in the paraxial region). In this text, the surface of each lens closest to the object being photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens. For the object side surface, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the image side surface, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0081] It should also be understood that the terms "comprises", "comprising", "has", "including" and / or "including having", when used in this specification, denote the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. Further, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features rather than individual elements in the list. Further, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0082] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formalized sense unless expressly so defined herein.

[0083] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The following embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, 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 drawings and in combination with the embodiments.

[0084] According to one aspect of the present application, as Figure 1As shown in the figure, in an embodiment of the present application, an optical lens is provided, which may include a lens barrel and a lens group and a spacer assembly accommodated within 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. Among them, the first lens has a negative optical power, the object side and the image side of the first lens are concave surfaces, the second lens has a positive optical power, the object side and the image side of the second lens are convex surfaces, the third lens has an optical power, the object side of the third lens is a convex surface, the fourth lens has a positive optical power, the object side and the image side of the fourth lens are convex surfaces, and the fifth lens has a negative optical power, the object side and the image side of the fifth lens are concave surfaces.

[0085] The spacer assembly includes 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 contacts the image side of the first lens. The second spacer element is disposed on the image side of the second lens and contacts the image side of the second lens. The third spacer element is disposed on the image side of the third lens and contacts the image side of the third lens. The fourth spacer element is disposed on the image side of the fourth lens and contacts the image side of the fourth lens.

[0086] Specifically, the optical lens satisfies:

[0087] 6.20mm < TD × tan(HFOV) < 6.95mm; and

[0088] -10.50mm ≤ ∑EP / EP01 × R1 < -5.75mm;

[0089] Wherein, ∑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 angle of the optical lens, and R1 is the curvature radius of the object side of the first lens.

[0090] Further preferably, 6.22mm ≤ TD × tan(HFOV) ≤ 6.94mm, -10.50mm ≤ ∑EP / EP01 × R1 ≤ -5.79mm.

[0091] It should be noted that in the above embodiments of the present application, based on the limitation condition of 6.20mm < TD×tan(HFOV) < 6.95mm, the length of the optical lens is reduced, realizing the miniaturization of the optical lens. Subsequently, on the basis of ensuring a large field of view angle and a high light input, the occurrence of large step differences is restricted, and the assembly stability of the optical lens is improved. Further, based on the limitation condition of -10.50mm ≤ ∑EP / EP01×R1 < -5.75mm, the above optical lens can also reasonably arrange each lens and spacer element, especially optimize the position and structure of the first lens, which can ensure that the first lens does not protrude from the object side of the lens barrel, reduce the 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, improving the imaging quality.

[0092] Exemplarily, Figure 2A shows the modulation transfer function curve of the optical lens when TD×tan(HFOV) = 6.50mm and ∑EP / EP01×R1 = -11mm are satisfied simultaneously. Figure 2B shows the modulation transfer function curve of the optical lens when TD×tan(HFOV) = 6.50mm and ∑EP / EP01×R1 = -10mm are satisfied simultaneously. Figure 2C shows the modulation transfer function curve of the optical lens when TD×tan(HFOV) = 6.50mm and ∑EP / EP01×R1 = -6mm are satisfied simultaneously. Figure 2D shows the modulation transfer function curve of the optical lens when TD×tan(HFOV) = 6.50mm and ∑EP / EP01×R1 = -5mm are satisfied simultaneously. It is easy to know from the figure that: as Figure 2A 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, resulting in field curvature deviation and increased imaging dispersion of the optical lens; as Figure 2B and Figure 2C shown, at this time -10.50mm ≤ ∑EP / EP01×R1 < -5.75mm, and the defocus curve meets the usage requirements of the optical lens; as Figure 2D shown, at this time ∑EP / EP01×R1 ≥ -5.75mm, the central angle corresponding to the effective radius of the first lens is relatively large, the processing difficulty of the first lens increases and stray light is likely to occur, resulting in increased imaging dispersion of the optical lens.

[0093] Preferably, the optical lens satisfies: -1.05 < (d0s - d1s) / R1 < -0.15; where 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 curvature radius of the object side of the first lens.

[0094] More preferably, -1.02 ≤ (d0s - d1s) / R1 ≤ -0.19.

[0095] 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 surface of the first lens, reducing the occurrence of cracking of the first lens during the assembly process, and improving the assembly yield. Moreover, by controlling the value range of (d0s - d1s) / R1, it is also possible to avoid excessive sagittal height, reduce the forming difficulty of the first lens, and improve the forming yield of the first lens.

[0096] Preferably, the optical lens satisfies: 1.15 < (EP01 + CP1) / (CT1 + T12) < 2.20; where CP1 is the maximum thickness of the first spacer element, CT1 is the central thickness of the first lens, and T12 is the central thickness of the air gap between the image side surface of the first lens and the object side surface of the second lens.

[0097] More preferably, 1.16 ≤ (EP01 + CP1) / (CT1 + T12) ≤ 2.18.

[0098] In this way, by adjusting the value of (EP01 + CP1) / (CT1 + T12), the edge thickness and central thickness of the first lens can be controlled, ensuring the forming feasibility of the first lens. By adjusting the value of (EP01 + CP1) / (CT1 + T12), the central thickness of the air gap between the first lens and the second lens can also be controlled simultaneously, which helps to reduce the sensitivity of the first lens and the second lens.

[0099] Preferably, the optical lens satisfies: 0.10 ≤ (D1m - d1m) / R3 < 1.25; where D1m is the outer diameter of the image side surface of the first spacer element, d1m is the inner diameter of the image side surface of the first spacer element, and R3 is the curvature radius of the object side surface of the second lens.

[0100] More preferably, 0.10 ≤ (D1m - d1m) / R3 ≤ 1.23.

[0101] In this way, by controlling the difference between the outer diameter of the image side surface of the first spacer element and the inner diameter of the image side surface of the first spacer element, it is possible to ensure that there is sufficient bearing area between the first spacer element and the second lens, thereby ensuring the bearing stability between the first spacer 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 can be controlled to adjust the surface shape of the second lens, reduce the processing difficulty of the second lens, and improve the forming yield of the second lens.

[0102] Preferably, the optical lens satisfies: -3.20 < f1 / d1m ≤ -1.40; where f1 is the effective focal length of the first lens, and d1m is the inner diameter of the image side of the first spacer element.

[0103] More preferably, -3.19 ≤ f1 / d1m ≤ -1.40.

[0104] 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 chromatic aberration effect of the optical system and improving the imaging resolution. Similarly, by controlling the inner diameter of the image side of the first spacer element based on -3.20 < f1 / d1m ≤ -1.40, it helps to block excess light and reduce stray light, improving the imaging quality of the lens.

[0105] Preferably, the optical lens satisfies: 2.90 mm < EP13 / (CT1 + CT2) × f12 < 12.00 mm; where 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 central thickness of the first lens, CT2 is the central thickness of the second lens, and f12 is the combined focal length of the first lens and the second lens.

[0106] More preferably, 2.91 mm ≤ EP13 / (CT1 + CT2) × f12 ≤ 11.96 mm.

[0107] Where 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.

[0108] In this way, by controlling the value of EP13 / (CT1 + CT2) × f12, the refraction of light between the first lens and the second lens can be effectively controlled, reducing internal stray light and improving the imaging quality. Moreover, it can also ensure the compactness between the first lens and the second lens, which helps to miniaturize the optical lens.

[0109] Preferably, the optical lens satisfies: 0.30 < (D1s - d1s) / (D2s - d2s) < 1.70; where D1s is the outer diameter of the object side of the first spacer element, d1s is the inner diameter of the object side of the first spacer element, 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.

[0110] More preferably, 0.32 ≤ (D1s - d1s) / (D2s - d2s) ≤ 1.66.

[0111] In this way, by controlling the ratio of the difference between the outer and inner diameters of the side surface of the first spacer element to the difference between the outer and inner diameters of the side surface of the second spacer element, the assembly stability among the first spacer element, the second lens, and the second spacer element can be improved, and the risk of lens reliability can be reduced.

[0112] Preferably, the optical lens satisfies: 1.30 < d2s / CT2 < 2.40; where d2s is the inner diameter of the side surface of the second spacer element, and CT2 is the central thickness of the second lens.

[0113] More preferably, 1.33 ≤ d2s / CT2 ≤ 2.38.

[0114] In this way, by controlling the inner diameter of the side surface of the second spacer element and the central thickness of the second lens, under the condition of ensuring that the second lens can be processed and formed, it helps to improve the assembly stability of the front lens, improve the problem of low yield rate caused by the mating amount, ensure the assembly stability of the lens group, and improve the assembly yield rate of the optical lens.

[0115] Preferably, the optical lens satisfies: -5.60 < R4 / (D2s - d2s) < -0.85; where R4 is the curvature radius of the image side surface of the second lens, 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.

[0116] More preferably, -5.59 ≤ R4 / (D2s - d2s) ≤ -0.86.

[0117] In this way, the curvature radius of the image side surface of the second lens determines the surface shape trend of the second lens. By controlling the outer diameter of the side surface of the second spacer element and the inner diameter of the side surface of the second spacer element in cooperation, 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.

[0118] Preferably, the optical lens satisfies: 0.20 < CT3 / CP3 < 0.75; where CT3 is the central thickness of the third lens, and CP3 is the maximum thickness of the third spacer element.

[0119] More preferably, 0.24 ≤ CT3 / CP3 ≤ 0.74.

[0120] In this way, by controlling the central 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 forming of the third lens, but also can improve the assembly stability and imaging quality of the optical lens.

[0121] Preferably, the optical lens satisfies: 0.80 < (D3s - d3s) / CP3 < 3.05; where D3s is the outer diameter of the object side of the third spacer element, d3s is the inner diameter of the object side of the third spacer element, and CP3 is the maximum thickness of the third spacer element.

[0122] More preferably, 0.84 ≤ (D3s - d3s) / CP3 ≤ 3.01.

[0123] In this way, by controlling the outer diameter of the object side of the third spacer element, the inner diameter of the object side of the third spacer element, and the maximum thickness of the third spacer element, the third lens can be in a better bearing position, which helps to improve the assembly stability of the lens group and reduce the influence of high-temperature and high-humidity environments on the field curvature of the outer field of view. In addition, on the premise that the third lens and the fourth lens can be formed, 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 distributed, so that the imaging quality in the middle section of the optical system is uniform and stable, and then the problem of the peak drop of the outer field of view during assembly can be improved, and the lens performance can be enhanced.

[0124] Preferably, the optical lens satisfies: 0.65 < CP3 / EP23 < 2.80; where CP3 is the maximum thickness of the third spacer element, and EP23 is the distance between the image side of the second spacer element and the object side of the third spacer element.

[0125] More preferably, 0.67 ≤ CP3 / EP23 ≤ 2.78.

[0126] 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 the formation of the third lens, but also can avoid too much internal reflected light caused by too large edge thickness of the third lens, which is beneficial to the improvement of the shooting effect.

[0127] Preferably, the optical lens satisfies: 0.40 < (D4m - d4m) / CT4 < 2.15; where 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 central thickness of the fourth lens.

[0128] More preferably, 0.41 ≤ (D4m - d4m) / CT4 ≤ 2.13.

[0129] In this way, by controlling the ratio of the difference between the inner and outer diameters of the lateral surface of the fourth spacer element to the central thickness of the fourth lens, the thickness of the fourth spacer element can be better controlled and the strength of the fourth lens can be enhanced. Similarly, by adjusting the difference between the inner and outer diameters of the lateral 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, and the assembly stability can be improved.

[0130] Preferably, the optical lens satisfies: 1.85 < CT4 / EP34 × n4 < 5.00; where CT4 is the central thickness of the fourth lens, EP34 is the distance between the lateral image surface of the third spacer element and the object surface of the fourth spacer element, and n4 is the refractive index of the fourth lens.

[0131] More preferably, 1.87 ≤ CT4 / EP34 × n4 ≤ 4.97.

[0132] In this way, the molding difficulty of the fourth lens can be reduced, and at the same time, the light condensing effect of the fourth lens can be enhanced, thereby improving the imaging quality of the optical lens.

[0133] Preferably, the optical lens satisfies: -2.75 < (D0m - D4m) / f5 < -0.80; where D0m is the outer diameter of the lateral image surface of the lens barrel, D4m is the outer diameter of the lateral image surface of the fourth spacer element, and f5 is the effective focal length of the fifth lens.

[0134] More preferably, -2.73 ≤ (D0m - D4m) / f5 ≤ -0.83.

[0135] In this way, by controlling the outer diameter of the lateral image surface of the lens barrel, the outer diameter of the lateral image surface 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 extreme process during lens production can be improved. Through the limiting 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, and the assembly stability of the lens can be improved.

[0136] Preferably, the optical lens satisfies: 0.10 ≤ CP3 / |R7 - R6| ≤ 1.35; where CP3 is the maximum thickness of the third spacer element, R7 is the curvature radius of the object surface of the fourth lens, and R6 is the curvature radius of the lateral image surface of the third lens.

[0137] In this way, by controlling the maximum thickness of the third spacer element, the curvature radius of the object side surface of the fourth lens, and the curvature radius of the image side surface of the third lens, the production cost of the optical lens can be reduced, and at the same time, it is beneficial to improve the assembly stability of the optical lens group. Through the limiting condition of 0.10 ≤ CP3 / |R7 - R6| ≤ 1.35, the matching degree of the curvature radius of the object side surface of the fourth lens and the curvature radius of the image side surface 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.

[0138] Preferably, the optical lens satisfies: 0.95 < d0s / f < 1.85; where d0s is the inner diameter of the object side surface of the lens barrel, and f is the effective focal length of the optical lens.

[0139] More preferably, 0.96 ≤ d0s / f ≤ 1.83.

[0140] In this way, by controlling the inner diameter of the object side surface of the lens barrel and the effective focal length of the optical lens, the light incident amount of the optical lens can be ensured, and the imaging quality can be improved.

[0141] It should be noted that those skilled in the art should understand that without departing from the technical solution required to be protected by this application, the number of spacer elements constituting the intermediate element of the optical lens can be changed to obtain the various results and advantages described in this specification, and this application does not make specific limitations in this regard. For example, according to needs, the optical imaging lens may also include other numbers of spacer elements different from those described in the above embodiments.

[0142] The following will describe some specific but non-limiting embodiments of the above embodiments of the present application in more detail with reference to the accompanying drawings. For the convenience of description, in the following embodiments, OBJ represents the object surface of the optical lens, STO represents the surface of the aperture stop, 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 aspherical coefficient, where j = 4, 6, 8, 10, 12, 14, 16, 18, 20.

[0143] Embodiment 1

[0144] As Figure 3As shown, in this embodiment, the optical lens includes a lens barrel P0, and a lens group and a spacer assembly accommodated within the lens barrel P0. The lens group includes 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. Among them, the first lens E1 has a negative optical power, the object side and the image side of the first lens E1 are concave surfaces, the second lens E2 has a positive optical power, the object side and the image side of the second lens E2 are convex surfaces, the third lens E3 has a negative optical power, the object side of the third lens E3 is a convex surface, the image side of the third lens E3 is a concave surface, the fourth lens E4 has a positive optical power, the object side and the image side of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative optical power, the object side and the image side of the fifth lens E5 are concave surfaces. The spacer assembly includes a first spacer element P1, a second spacer element P2, a third spacer element P3, and a fourth spacer element P4. The first spacer element P1 is placed on the image side of the first lens E1 and contacts the image side of the first lens E1. The second spacer element P2 is placed on the image side of the second lens E2 and contacts the image side of the second lens E2. The third spacer element P3 is placed on the image side of the third lens E3 and contacts the image side of the third lens E3. The fourth spacer element P4 is placed on the image side of the fourth lens E4 and contacts the image side of the fourth lens E4.

[0145] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of the first embodiment. Among them, the unit of the radius of curvature and the thickness is millimeter (mm).

[0146] Table 1: Basic Optical Parameter Table of the Optical Lens of the First Embodiment

[0147]

[0148] In this embodiment, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface profiles of each aspherical lens x can be defined by, but not limited to, the following aspherical formula:

[0149] ;

[0150] where x is the distance sag from the vertex of the aspherical surface when the height of the aspherical surface along the optical axis is h ; c is the paraxial curvature of the aspherical surface, c =1 / R (that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the iCorrection coefficient of the order. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 that can be used for each aspherical mirror surface S1 to S10 in the first embodiment.

[0151] Table 2: Aspherical coefficient table of the optical lens in the first embodiment

[0152]

[0153] Second embodiment

[0154] As Figure 4 shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0. The lens group includes 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. Among them, the first lens E1 has a negative optical power, the object side and the image side of the first lens E1 are concave surfaces, the second lens E2 has a positive optical power, the object side and the image side of the second lens E2 are convex surfaces, the third lens E3 has a negative optical power, the object side of the third lens E3 is a convex surface, the image side of the third lens E3 is a concave surface, the fourth lens E4 has a positive optical power, the object side and the image side of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative optical power, the object side and the image side of the fifth lens E5 are concave surfaces. The spacer assembly includes a first spacer element P1, a second spacer element P2, a third spacer element P3, and a fourth spacer element P4. The first spacer element P1 is placed on the image side of the first lens E1 and is in contact with the image side of the first lens E1. The second spacer element P2 is placed on the image side of the second lens E2 and is in contact with the image side of the second lens E2. The third spacer element P3 is placed on the image side of the third lens E3 and is in contact with the image side of the third lens E3. The fourth spacer element P4 is placed on the image side of the fourth lens E4 and is in contact with the image side of the fourth lens E4.

[0155] It should be noted that compared with the above-mentioned first embodiment, the optical lens of this second embodiment has the same white object structure, that is, the basic optical parameter table of the optical lens of this second embodiment is the same as Table 1, and the aspherical coefficient table is the same as Table 2. And the optical lens of this second embodiment and the optical lens of the above-mentioned first embodiment have different black object structures, that is, the difference between this second embodiment and the above-mentioned first embodiment is that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different.

[0156] Specifically, the numerical values of the respective relevant structural parameters in the second embodiment and the first embodiment are shown in Table 8 below. 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 spacer element P1, the distance EP12 between the image side of the first spacer element P1 and the object side of the second spacer element P2, the distance EP23 between the image side of the second spacer element P2 and the object side of the third spacer element P3, the distance EP34 between the image side of the third spacer element P3 and the object side of the fourth spacer element P4, the maximum thickness CP1 of the first spacer element P1, the maximum thickness CP2 of the second spacer element P2, the maximum thickness CP3 of the third spacer element P3, the maximum thickness CP4 of the fourth spacer element P4, the inner diameter d1s of the object side of the first spacer element P1, the inner diameter d1m of the image side of the first spacer element P1, the outer diameter D1s of the object side of the first spacer element P1, the outer diameter D1m of the image side of the first spacer element P1, the inner diameter d2s of the object side of the second spacer element P2, the outer diameter D2s of the object side of the second spacer element P2, the inner diameter d3s of the object side of the third spacer element P3, the inner diameter d4m of the image side of the fourth spacer element P4, the outer diameter D4m of the image side of the fourth spacer 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 distance EP13 between the image side of the first spacer element P1 and the object side of the third spacer element P3, and the outer diameter D3s of the object side of the third spacer element P3.

[0157] Embodiment Three

[0158] As 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.

[0159] 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.

[0160] 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.

[0161] After simulation test, the axial chromatic aberration curves of the optical lenses in Embodiment 1, Embodiment 2 and Embodiment 3 are as follows: Figure 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 curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical lenses in Embodiment 1, Embodiment 2, and Embodiment 3 are as Figure 6C shown; the longitudinal chromatic aberration curves of the optical lenses in Embodiment 1, Embodiment 2, and Embodiment 3 are as Figure 6D shown. According to Figure 6A , Figure 6B , Figure 6C and Figure 6D , it can be seen that the optical lenses in Embodiment 1, Embodiment 2, and Embodiment 3 can all achieve good imaging quality.

[0162] Embodiment 4

[0163] As Figure 7 shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0. The lens group includes 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. Among them, the first lens E1 has a negative optical power, the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive optical power, the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a positive optical power, the object side surface of the third lens E3 is a convex surface, the image side surface of the third lens E3 is a convex surface, the fourth lens E4 has a positive optical power, 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 optical power, and the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacer assembly includes a first spacer element P1, a second spacer element P2, a third spacer element P3, and a fourth spacer element P4. The first spacer element P1 is placed on the image side of the first lens E1 and is in contact with the image side surface of the first lens E1. The second spacer element P2 is placed on the image side of the second lens E2 and is in contact with the image side surface of the second lens E2. The third spacer element P3 is placed on the image side of the third lens E3 and is in contact with the image side surface of the third lens E3. The fourth spacer element P4 is placed on the image side of the fourth lens E4 and is in contact with the image side surface of the fourth lens E4.

[0164] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Embodiment 4, where the unit of the radius of curvature and the thickness is millimeter (mm).

[0165] Table 3: Basic Optical Parameter Table of the Optical Lens of Embodiment 4

[0166]

[0167] In this embodiment, both the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by the aspherical formula given in the first embodiment above. Table 4 below gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspherical surfaces S1 to S10 in the fourth embodiment.

[0168] Table 4: Aspherical Coefficient Table of the Optical Lens in the Fourth Embodiment

[0169]

[0170] Embodiment Five

[0171] As Figure 8 shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0. The lens group includes 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. Among them, the first lens E1 has a negative optical power, the object side and the image side of the first lens E1 are concave surfaces, the second lens E2 has a positive optical power, the object side and the image side of the second lens E2 are convex surfaces, the third lens E3 has a positive optical power, the object side of the third lens E3 is a convex surface, the image side of the third lens E3 is a convex surface, the fourth lens E4 has a positive optical power, the object side and the image side of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative optical power, and the object side and the image side of the fifth lens E5 are concave surfaces. The spacer assembly includes a first spacer element P1, a second spacer element P2, a third spacer element P3, and a fourth spacer element P4. The first spacer element P1 is placed on the image side of the first lens E1 and is in contact with the image side of the first lens E1. The second spacer element P2 is placed on the image side of the second lens E2 and is in contact with the image side of the second lens E2. The third spacer element P3 is placed on the image side of the third lens E3 and is in contact with the image side of the third lens E3. The fourth spacer element P4 is placed on the image side of the fourth lens E4 and is in contact with the image side of the fourth lens E4.

[0172] It should be noted that, compared with the above-mentioned Embodiment 4, the optical lens of this Embodiment 5 has the same white object structure, that is, the basic optical parameter table of the optical lens of this Embodiment 5 is the same as Table 3, and the aspherical coefficient table is the same as Table 4. The optical lens of this Embodiment 5 has a different black object structure from the optical lens of the above-mentioned Embodiment 4, that is, the difference between this Embodiment 5 and the above-mentioned Embodiment 4 lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the values of each relevant structural parameter in this Embodiment 5 are shown in Table 8 below, and the specific descriptions of multiple black object parameters are the same as the relevant descriptions in Embodiment 2 above, which will not be elaborated here.

[0173] Embodiment 6

[0174] As Figure 9 shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0. The lens group includes 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. Among them, the first lens E1 has a negative optical power, the object side and the image side of the first lens E1 are concave surfaces, the second lens E2 has a positive optical power, the object side and the image side of the second lens E2 are convex surfaces, the third lens E3 has a positive optical power, the object side of the third lens E3 is a convex surface, the image side of the third lens E3 is a convex surface, the fourth lens E4 has a positive optical power, the object side and the image side of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative optical power, the object side and the image side of the fifth lens E5 are concave surfaces. The spacer assembly includes a first spacer element P1, a second spacer element P2, a third spacer element P3, and a fourth spacer element P4. The first spacer element P1 is placed on the image side of the first lens E1 and is in contact with the image side of the first lens E1. The second spacer element P2 is placed on the image side of the second lens E2 and is in contact with the image side of the second lens E2. The third spacer element P3 is placed on the image side of the third lens E3 and is in contact with the image side of the third lens E3. The fourth spacer element P4 is placed on the image side of the fourth lens E4 and is in contact with the image side of the fourth lens E4.

[0175] It should be noted that, compared with the above-mentioned Embodiment 4, the optical lens of this Embodiment 6 has the same white object structure, that is, the basic optical parameter table of the optical lens of this Embodiment 6 is the same as Table 3, and the aspherical coefficient table is the same as Table 4. The optical lens of this Embodiment 6 has a different black object structure from the optical lens of the above-mentioned Embodiment 4, that is, the difference between this Embodiment 6 and the above-mentioned Embodiment 4 lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the values of each relevant structural parameter in this Embodiment 6 are shown in Table 8 below, and the specific descriptions of multiple black object parameters are the same as the relevant descriptions in Embodiment 2 above, which will not be elaborated here.

[0176] After simulation tests: The axial chromatic aberration curves of the optical lenses in Embodiment 4, Embodiment 5, and Embodiment 6 are as shown in Figure 10A , which represents the degree of deviation of the focus points of light rays with different wavelengths after passing through the optical lens; the astigmatism curves of the optical lenses in Embodiment 4, Embodiment 5, and Embodiment 6 are as shown in Figure 10B , which represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical lenses in Embodiment 4, Embodiment 5, and Embodiment 6 are as shown in Figure 10C ; the longitudinal chromatic aberration curves of the optical lenses in Embodiment 4, Embodiment 5, and Embodiment 6 are as shown in Figure 10D . According to Figure 10A , Figure 10B , Figure 10C and Figure 10D , it can be seen that the optical lenses in Embodiment 4, Embodiment 5, and Embodiment 6 can all achieve good imaging quality.

[0177] Embodiment 7

[0178] As shown in Figure 11 , in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0. The lens group includes 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. Among them, the first lens E1 has a negative optical power, the object side surface and the image side surface of the first lens E1 are concave surfaces, the second lens E2 has a positive optical power, the object side surface and the image side surface of the second lens E2 are convex surfaces, the third lens E3 has a negative optical power, the object side surface of the third lens E3 is a convex surface, the image side surface of the third lens E3 is a concave surface, the fourth lens E4 has a positive optical power, 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 optical power, the object side surface and the image side surface of the fifth lens E5 are concave surfaces. The spacer assembly includes a first spacer element P1, a second spacer element P2, a third spacer element P3, and a fourth spacer element P4. The first spacer element P1 is placed on the image side of the first lens E1 and is in contact with the image side surface of the first lens E1. The second spacer element P2 is placed on the image side of the second lens E2 and is in contact with the image side surface of the second lens E2. The third spacer element P3 is placed on the image side of the third lens E3 and is in contact with the image side surface of the third lens E3. The fourth spacer element P4 is placed on the image side of the fourth lens E4 and is in contact with the image side surface of the fourth lens E4.

[0179] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Embodiment 7, where the units of the radius of curvature and the thickness are both millimeters (mm).

[0180] Table 5: Aspherical Coefficient Table of the Optical Lens in Embodiment Seven

[0181]

[0182] In this embodiment, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by the aspherical formula given in Embodiment One above. The following Table 6 gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 for each of the aspherical surfaces S1 to S10 in Embodiment Seven.

[0183] Table 6: Aspherical Coefficient Table of the Optical Lens in Embodiment Seven

[0184]

[0185] Embodiment Eight

[0186] As Figure 12 shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0. The lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged in sequence along the optical axis from the object side to the image side. Among them, the first lens E1 has a negative optical power, the object side and the image side of the first lens E1 are concave surfaces, the second lens E2 has a positive optical power, the object side and the image side of the second lens E2 are convex surfaces, the third lens E3 has a negative optical power, the object side of the third lens E3 is a convex surface, the image side of the third lens E3 is a concave surface, the fourth lens E4 has a positive optical power, the object side and the image side of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative optical power, the object side and the image side of the fifth lens E5 are concave surfaces. The spacer assembly includes a first spacer element P1, a second spacer element P2, a third spacer element P3, and a fourth spacer element P4. The first spacer element P1 is placed on the image side of the first lens E1 and is in contact with the image side of the first lens E1. The second spacer element P2 is placed on the image side of the second lens E2 and is in contact with the image side of the second lens E2. The third spacer element P3 is placed on the image side of the third lens E3 and is in contact with the image side of the third lens E3. The fourth spacer element P4 is placed on the image side of the fourth lens E4 and is in contact with the image side of the fourth lens E4.

[0187] It should be noted that, compared with the seventh embodiment above, the optical lens of this eighth embodiment has the same white object structure, that is, the basic optical parameter table of the optical lens of this eighth embodiment is the same as Table 5, and the aspherical coefficient table is the same as Table 6. However, the optical lens of this eighth embodiment and the optical lens of the seventh embodiment above have different black object structures, that is, the difference between this eighth embodiment and the seventh embodiment above lies in that the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the numerical values of each relevant structural parameter in this eighth embodiment are shown in Table 8 below. The specific descriptions of multiple black object parameters are the same as the relevant descriptions in the second embodiment above and will not be elaborated here.

[0188] Embodiment Nine

[0189] As Figure 13 shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0. The lens group includes 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. Among them, the first lens E1 has a negative optical power, the object side and the image side of the first lens E1 are concave surfaces, the second lens E2 has a positive optical power, the object side and the image side of the second lens E2 are convex surfaces, the third lens E3 has a negative optical power, the object side of the third lens E3 is a convex surface, the image side of the third lens E3 is a concave surface, the fourth lens E4 has a positive optical power, the object side and the image side of the fourth lens E4 are convex surfaces, and the fifth lens E5 has a negative optical power, the object side and the image side of the fifth lens E5 are concave surfaces. The spacer assembly includes a first spacer element P1, a second spacer element P2, a third spacer element P3, and a fourth spacer element P4. The first spacer element P1 is placed on the image side of the first lens E1 and is in contact with the image side of the first lens E1. The second spacer element P2 is placed on the image side of the second lens E2 and is in contact with the image side of the second lens E2. The third spacer element P3 is placed on the image side of the third lens E3 and is in contact with the image side of the third lens E3. The fourth spacer element P4 is placed on the image side of the fourth lens E4 and is in contact with the image side of the fourth lens E4.

[0190] In this embodiment, one of the spacer elements is a fourth auxiliary spacer element P4b, and the fourth auxiliary spacer element P4b is placed on the image side of the fourth spacer element P4 and is in contact with the image side of the fourth spacer element P4.

[0191] It should be noted that, compared with the seventh embodiment above, the optical lens of this ninth embodiment has the same white object structure, that is, the basic optical parameter table of the optical lens of this ninth embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. The optical lens of this ninth embodiment has a different black object structure from the optical lens of the seventh embodiment above, that is, the difference between this ninth embodiment and the seventh embodiment above lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical lens are different. Specifically, the numerical values of the relevant structural parameters in this ninth embodiment are respectively shown in Table 8 below. The specific descriptions of the multiple black object parameters are the same as the relevant descriptions in the second embodiment above and will not be elaborated here.

[0192] Through simulation tests: the axial chromatic aberration curves of the optical lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 14A shown, which represents the deviation degree of the convergence points of light rays with different wavelengths after passing through the optical lens; the astigmatism curves of the optical lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 14B shown, which represents the curvature degree of the meridional image plane and the curvature degree of the sagittal image plane; the distortion curves of the optical lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 14C shown; the lateral chromatic aberration curves of the optical lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 14D shown. According to Figure 14A , Figure 14B , Figure 14C and Figure 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.

[0193] In summary, in the first to ninth embodiments, half of the diagonal length of the effective pixel area on the imaging surface ImgH, half of the maximum field of view angle of the optical lens HFOV, 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 shown in Table 7.

[0194] Table 7: System Optical Parameter Table of the Optical Lens

[0195]

[0196] In addition, the black object structure parameters of the optical lenses in the first to ninth embodiments are specifically shown in Table 8.

[0197] Table 8: Black Object Structure Parameter Table of the Optical Lens

[0198]

[0199] In summary, the optical lenses in Embodiments 1 to 9 satisfy the relational expressions shown in Table 9, as specifically shown in Table 9.

[0200] Table 9: Table of Relational Expressions Satisfied by the Optical Lens

[0201]

[0202] It is worth mentioning that, according to one aspect of the present application, an embodiment of the present application further provides an imaging module, which may include the above optical lens and a photosensitive element, and the photosensitive element is disposed on the image side of the optical lens for imaging. It can be understood that the photosensitive element mentioned in the present application may be, but is not limited to, implemented as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) element, and the present application will not elaborate on this.

[0203] In addition, according to another aspect of the present application, an embodiment of the present application further provides an electronic device, which may include the above imaging module and a processor, and the imaging module is communicatively connected to the processor for acquiring image data and inputting the image data into the processor for processing. It can be 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 above imaging module, and the present application will not elaborate on this.

[0204] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as within the scope described in this specification.

[0205] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An optical lens, characterized in that: It includes a lens barrel, a lens group and a spacer assembly accommodated within the lens barrel; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: The first lens, having a negative optical power, with the object side and the image side being concave surfaces; The second lens, having a positive optical power, with the object side and the image side being convex surfaces; The third lens, having an optical power, with the object side being a convex surface; The fourth lens, having a positive optical power, with the object side and the image side being convex surfaces; The fifth lens, having a negative optical power, with the object side and the image side being concave surfaces; The spacer assembly includes a first spacer element, a second spacer element, a third spacer element and a fourth spacer element. The first spacer element is placed on the image side of the first lens and contacts the image side of the first lens. The second spacer element is placed on the image side of the second lens and contacts the image side of the second lens. The third spacer element is placed on the image side of the third lens and contacts the image side of the third lens. The fourth spacer element is placed on the image side of the fourth lens and contacts the image side of the fourth lens; The optical lens satisfies: 6.20mm < TD × tan(HFOV) < 6.95mm; and -10.50mm ≤ ∑EP / EP01 × R1 < -5.75mm; Wherein, ∑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 angle of the optical lens, and R1 is the curvature radius of the object side of the first lens.

2. The optical lens according to claim 1, wherein 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 curvature radius of the object side of the first lens.

3. The optical lens according to claim 1, wherein 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 central thickness of the first lens, and T12 is the central thickness of the air gap between the image side of the first lens and the object side 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 of the first spacer element, d1m is the inner diameter of the image side of the first spacer element, and R3 is the curvature radius of the object side of the second lens.

5. The optical lens according to claim 1, wherein 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 of the first spacer element.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies: 2.90mm < EP13 / (CT1 + CT2)×f12 < 12.00mm; Wherein, 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 central thickness of the first lens, CT2 is the central 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, wherein The optical lens satisfies: 0.30 < (D1s - d1s) / (D2s - d2s) < 1.70; Wherein, D1s is the outer diameter of the object side of the first spacer element, d1s is the inner diameter of the object side of the first spacer element, 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.

8. The optical lens according to claim 1, wherein The optical lens satisfies: 1.30 < d2s / CT2 < 2.40; Where d2s is the inner diameter of the object side of the second spacer element and CT2 is the central 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; 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.

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 central thickness of the third lens and CP3 is the maximum thickness of the third spacer 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 object side of the third spacer element, d3s is the inner diameter of the object side of the third spacer element, and CP3 is the maximum thickness of the third spacer element.

12. The optical lens according to claim 1, wherein The optical lens satisfies: 0.65 < CP3 / EP23 < 2.80; Wherein, CP3 is the maximum thickness of the third spacer 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 of the fourth spacer element, d4m is the inner diameter of the image side of the fourth spacer element, and CT4 is the central thickness of the fourth lens.

14. The optical lens according to claim 1, wherein, The optical lens satisfies: 1.85 < CT4 / EP34×n4 < 5.00; Wherein, CT4 is the central 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 spacer element, and f5 is the effective focal length of the fifth lens.

16. The optical lens according to claim 1, wherein, The optical lens satisfies: 0.10 ≤ CP3 / |R7 - R6| ≤ 1.35; Wherein, CP3 is the maximum thickness of the third spacer 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.

17. The optical lens according to claim 1, wherein 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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