Camera lens

Abstract

The utility model provides a pick-up lens. The pick-up 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 five lenses which are sequentially arranged from the object side to the image side along the optical axis, and the focal powers of the first four lenses are arranged according to positive-negative-positive-negative; the spacing assembly comprises a first spacing element which is arranged on the image side of the first lens and is in contact with the image side surface of the first lens, a second spacing element which is arranged on the image side of the second lens and is in contact with the image side surface of the second lens, and a third spacing element which is arranged on the image side of the third lens and is in contact with the image side surface of the third lens; a fourth spacer element disposed on an image side of the fourth lens and in contact with an image side surface of the fourth lens; the camera lens satisfies the following conditions:-1.73 lt; f3 / R6 / (N3-1) lt; -1.12,-1.12; 2.10 lt, 2.10 lt; (EP12 + EP23) / EP34lt; 2.75% of the total weight; the thickness is-10.20 mm < lt >; f4 / (CT4 / EP34) lt; and-4.80 mm.

Description

Technical Field

[0001] This application relates to the field of optical device technology, and in particular to a camera lens. Background Technology

[0002] Smart glasses are wearable eyewear devices with their own operating systems, similar to smartphones, capable of various functions through software installation. Key technologies for smart glasses include near-eye display technology, accelerated AI application, improved hardware / software performance, operating system platform support, and innovative interaction technologies. As the smart glasses market develops, optimizing user experience is a crucial trend. This optimization requires smart glasses designs to prioritize lightweight design and comfort. Furthermore, the lens assembly in near-eye display technology, a core component of smart glasses, also needs improvement to align with miniaturization and lightweight design trends.

[0003] To avoid compromising imaging performance during lens miniaturization, existing smart glasses lenses employ lens groups to optimize imaging. Although five-element lens group structures are available on the market, which can meet imaging performance and reduce stray light requirements to some extent, temperature drift issues exist during assembly and use of the multiple lenses and spacers in the lens group. A common solution is to use a certain number of glass lenses, but glass lenses are difficult to process and form. Inappropriate edge thickness can easily increase the risk of lens edges being crushed, leading to increased assembly difficulty. In particular, when processing lenses with curved surfaces, the yield rate is low, increasing the manufacturing cost of camera lens products. Utility Model Content

[0004] One advantage of this application is that it provides a camera lens that can solve the problem of high manufacturing difficulty caused by assembly issues due to temperature and lens forming in existing five-element lenses.

[0005] This application provides a camera lens, including a lens barrel and a lens group and a spacer assembly housed within the lens barrel; the inner diameter of the image-side surface of the lens barrel is larger than the inner diameter of the object-side surface; the lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with negative optical power, and a fifth lens with optical power, each lens having an effective diameter region for refracting light and a non-effective diameter region extending from the effective diameter region in a direction away from the optical axis; the spacer assembly includes a first spacer element placed on the image side of the first lens and in contact with the image-side surface of the first lens, a second spacer element placed on the image side of the second lens and in contact with the image-side surface of the second lens, a third spacer element placed on the image side of the third lens and in contact with the image-side surface of the third lens, and a fourth spacer element placed on the image side of the fourth lens and in contact with the image-side surface of the fourth lens; the camera lens satisfies:

[0006] -1.73 <f3 / R6 / (N3-1)<-1.12;

[0007] 2.10 < (EP12 + EP23) / EP34 < 2.75;

[0008] -10.20mm <f4 / (CT4 / EP34)<-4.80mm;

[0009] Wherein, f3 is the effective focal length of the third lens, R6 is the radius of curvature of the image side surface of the third lens, N3 is the refractive index of the third lens, EP12 is the distance between the first and second spacers in the optical axis direction, EP23 is the distance between the second and third spacers in the optical axis direction, EP34 is the distance between the third and fourth spacers in the optical axis direction, f4 is the effective focal length of the fourth lens, and CT4 is the center thickness of the fourth lens.

[0010] In some embodiments of this application, the object-side surface of the first lens is convex and its image-side surface is concave; the object-side surface of the second lens is convex and its image-side surface is concave.

[0011] In some embodiments of this application, the center thickness CT3 of the third lens, the spacing EP23 between the second spacer element and the third spacer element in the optical axis direction, and the refractive index N3 of the third lens satisfy the following:

[0012] 1.70 <N3<1.90;1.40<CT3 / EP23<1.80。

[0013] In some embodiments of this application, the inner diameter d0m of the image side of the lens barrel and the inner diameter d0s of the object side of the lens barrel satisfy the following:

[0014] 2.05 <d0m / d0s<2.65。

[0015] In some embodiments of this application, the effective focal length f3 of the third lens, the refractive index N3 of the third lens, and the spacing EP23 between the second spacer element and the third spacer element in the optical axis direction satisfy the following:

[0016] 2.30 <f3 / N3 / EP23<3.05。

[0017] In some embodiments of this application, the center thickness of the third lens is greater than the center thickness of the other lenses, and the maximum thickness of the non-effective diameter region of the third lens is greater than the maximum thickness of the non-effective diameter regions of the second lens and the fourth lens; the center thickness CT3 of the third lens, the center thickness CT2 of the second lens, and the center thickness CT4 of the fourth lens satisfy the following:

[0018] 1.35 <CT3 / (CT2+CT4)<2.05。

[0019] In some embodiments of this application, the outer diameter D3s of the side surface of the third spacer element and the inner diameter d2s of the side surface of the second spacer element satisfy the following:

[0020] 1.85 <D3s / d2s<2.60。

[0021] In some embodiments of this application, the outer diameter D3m of the image side of the third spacer element, the inner diameter d3s of the object side of the third spacer element, and the maximum thickness CP3 of the third spacer element satisfy the following:

[0022] 34.05 < (D3m-d3s) / CP3 < 85.15.

[0023] In some embodiments of this application, the outer diameter D3m of the image side of the third spacer element, the inner diameter d3s of the object side of the third spacer element, the outer diameter D4s of the object side of the fourth spacer element, and the inner diameter d4s of the object side of the fourth spacer element satisfy the following:

[0024] 0.50<(D3m-d3s) / d3m<0.83, 0.80<(D4s-d3s) / d4s<1.10.

[0025] In some embodiments of this application, the air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, the maximum thickness CP2 of the second spacer element, and the maximum thickness CP3 of the third spacer element satisfy the following:

[0026] 5.40≤(T23+T34) / (CP2+CP3)<9.80.

[0027] In some embodiments of this application, the spacing EP34 between the third spacer element and the fourth spacer element in the optical axis direction, the air gap T34 between the third lens and the fourth lens in the optical axis, the center thickness CT4 of the fourth lens, and the air gap T45 between the fourth lens and the fifth lens in the optical axis satisfy the following:

[0028] 0.73 <EP34 / (T34+CT4+T45)<0.93。

[0029] In some embodiments of this application, the outer diameter D0s of the lens barrel side surface, the effective focal length f of the camera lens, and half of the maximum field of view (Semi-FOV) of the camera lens satisfy the following:

[0030] 1.25 <D0s / (f*tan(Semi-FOV))<1.40。

[0031] In some embodiments of this application, the image-side surface of the third lens is convex; the object-side surface of the fourth lens is concave while the image-side surface is convex; the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R7 of the object-side surface of the fourth lens, and the inner diameter d3s of the object-side surface of the third spacer element satisfy the following:

[0032] -1.70<(R6+R7) / d3s<-1.25.

[0033] In some embodiments of this application, the object-side surface of the fifth lens is convex, its image-side surface is concave, and the fifth lens is meniscus in the region near the optical axis. Both the object-side and image-side surfaces of the fifth lens have at least one inflection point. The distance EP40 between the image-side surface of the fourth spacer element and the image-side surface of the lens barrel on the optical axis, and the center thickness CT5 of the fifth lens, satisfy the following:

[0034] 2.20 <EP40 / CT5<2.70。

[0035] In summary, for the camera lens of the present application, the optical powers of the first four lenses are distributed as positive-negative-positive-negative along the optical axis. The refractive index of the material of the third lens is relatively high, and the focal length f3 of the third lens, the curvature radius R6 of the image-side surface of the third lens, and the refractive index N3 of the third lens are constrained to satisfy the conditional formula. Due to the influence of the processing and shaping on the shape of the third lens, the transition between the effective diameter region and the non-effective diameter region is as smooth as possible. The edge thickness of the third lens is relatively thin, and there is a risk of being cracked during assembly. When determining the effective diameter region of the lens, simply increasing the thickness of the non-effective diameter region of the third lens easily causes an anti-curve at the edge of the side surface of the lens. When the surface profiles of the two opposite surfaces of two adjacent lenses are quite different, the degree of anti-curve at the lens edge also needs to be increased accordingly. This increases the difficulty of processing, post-processing, and detection of the lens, undoubtedly increasing the production cost, and also cannot guarantee the yield of lens production. Therefore, in the present application, the relationships between the distances EP12, EP23, EP34 between the first four lenses and the focal length f4 and the center thickness CT4 of the fourth lens are also constrained to ensure that the edge thickness of the third lens is within a reasonable range and the fourth lens does not interfere with the third lens, thereby reducing the risk of cracking of the third lens during assembly and reducing the processing difficulty of each lens in the lens group, which helps to improve the product yield and reduce the manufacturing cost.

[0036] According to another aspect of the present application, the present application also provides a camera lens, including a lens barrel and a lens group and a spacer assembly accommodated within the lens barrel; the inner diameter of the image side of the lens barrel is larger than the inner diameter of the object side; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens with a positive optical power, the object-side surface of the first lens is convex, and its image-side surface is concave; a second lens with a negative optical power, the object-side surface of the second lens is convex, and its image-side surface is concave; a third lens with a positive optical power, the image-side surface of the third lens is convex; a fourth lens with a negative optical power, the object-side surface of the fourth lens is concave, and its image-side surface is convex; a fifth lens with an optical power, the object-side surface of the fifth lens is convex, and its image-side surface is concave, and at least one anti-curve point is provided on each of the object-side surface and the image-side surface of the fifth lens;

[0037] The spacer assembly includes a plurality of spacer elements, and at least one of the spacer elements is disposed between two adjacent lenses in the lens group;

[0038] The camera lens also satisfies:

[0039] 2.0 < d0m / d0s < 2.61; and

[0040] 2.20 < EP40 / CT5 < 2.70;

[0041] Wherein, d0m is the inner diameter of the image side surface of the lens barrel, d0s is the inner diameter of the object side surface of the lens barrel, EP40 is the distance in the optical axis direction from the image side surface of the fourth spacer element, which is placed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens, to the image side surface of the lens barrel, and CT5 is the center thickness of the fifth lens.

[0042] In summary, the camera lens of this application, by distributing the optical power of the first four lenses in a positive-negative-positive-negative order along the optical axis, and simultaneously constraining the inner diameter of the image-side and object-side surfaces of the lens barrel to define the shape of the lens barrel, is beneficial to improving the extinction effect of imaging light in the non-effective area of ​​the fifth lens and avoiding the generation of stray light or light leakage that affects image quality. Furthermore, the object-side and image-side surfaces of the fifth lens need to be arranged with inflection points to ensure installation, which also brings difficulties to the processing and assembly of the fifth lens. By further constraining the relationship between the distance from the image-side surface of the fourth spacer element to the image-side surface of the lens barrel in the optical axis direction and the center thickness of the fifth lens, it is beneficial to reduce the processing difficulty of the fifth lens and ensure the adhesive fixation between the fifth lens and the lens barrel. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structural parameters of a camera lens according to one embodiment of this application;

[0044] Figure 2 This is a schematic diagram of the camera lens in working condition 1-1 according to Embodiment 1 of this application;

[0045] Figure 3 This is a schematic diagram of the camera lens structure in working conditions 1-2 of Embodiment 1 of this application;

[0046] Figure 4 This is a schematic diagram of the camera lens structure in working conditions 1-3 of Embodiment 1 of this application;

[0047] Figure 5A A schematic diagram of the on-axis chromatic aberration curves of the camera lens under three working conditions in Embodiment 1 of this application is shown.

[0048] Figure 5B A schematic diagram of the magnification chromatic aberration curves of the camera lens under three working conditions in Embodiment 1 of this application is shown.

[0049] Figure 6 This is a schematic diagram of the camera lens in working condition 2-1 according to Embodiment 2 of this application;

[0050] Figure 7 This is a schematic diagram of the camera lens in working condition 2-2 according to Embodiment 2 of this application;

[0051] Figure 8This is a schematic diagram of the camera lens structure in working conditions 2-3 of Embodiment 2 of this application;

[0052] Figure 9A A schematic diagram of the on-axis chromatic aberration curves of the camera lens under three working conditions in Embodiment 2 of this application is shown;

[0053] Figure 9B A schematic diagram of the magnification chromatic aberration curves of the camera lens under three working conditions in Embodiment 2 of this application is shown;

[0054] Figure 10 This is a schematic diagram of the camera lens in working condition 3-1 according to Embodiment 3 of this application;

[0055] Figure 11 This is a schematic diagram of the camera lens in working condition 3-2 according to Embodiment 3 of this application;

[0056] Figure 12 This is a schematic diagram of the camera lens in working condition 3-3 according to Embodiment 3 of this application;

[0057] Figure 13A A schematic diagram of the on-axis chromatic aberration curves of the camera lens under three working conditions in Embodiment 3 of this application is shown;

[0058] Figure 13B A schematic diagram of the magnification chromatic aberration curves of the camera lens under three working conditions in Embodiment 3 of this application is shown.

[0059] Figure 14 The diagram shows a magnified view of the camera lens when f3 / R6 / (N3-1)=-1.71; (EP12+EP23) / EP34=1.80; f4 / (CT4 / EP34)=-11.8mm.

[0060] Figure 15 The diagram shows a magnified view of the camera lens when f3 / R6 / (N3-1)=-1.71; (EP12+EP23) / EP34=2.16; f4 / (CT4 / EP34)=-10.19mm.

[0061] Figure 16 The diagram shows a magnified view of the camera lens when f3 / R6 / (N3-1)=-1.71; (EP12+EP23) / EP34=3.00; f4 / (CT4 / EP34)=-4.40mm.

[0062] Reference numerals: P0, lens barrel; P1, first spacer element; P2, second spacer element; P3, third spacer element; P4, fourth spacer element; E1, first lens; E2, second lens; E3, third lens; E4, fourth lens; E5, fifth lens. Detailed Implementation

[0063] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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.

[0064] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0065] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0066] In this paper, the effective diameter region of a lens refers to the portion of the lens used for imaging or light transmission, while the non-effective diameter region refers to the portion of the lens that does not participate in imaging or light transmission. This non-effective diameter region is mainly used to mate with the lens spacer and lens barrel to fix the lens's position within the lens. Generally, the object-side and image-side surfaces of the non-effective diameter region are parallel to each other for ease of assembly. In some lens designs, the object-side and image-side surfaces of the effective diameter region may have a curved design; the specific location of the curvature point needs to be determined according to the lens surface shape calculation formula.

[0067] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0068] It should also be understood that the terms "comprising," "including," "having," "containing," 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. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0069] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0070] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0071] It is worth noting that the measurement directions for thickness and maximum thickness in this application are both along the optical axis. For example, the center thickness of a lens represents the distance between the object side and the image side of the lens along the optical axis, the maximum thickness of the non-effective diameter region of the lens represents the distance between the object side and the image side of the non-effective diameter region along the optical axis, and the maximum thickness of a spacer element represents the distance between the object side and the image side of the spacer element along the optical axis.

[0072] According to one aspect of this application, such as Figure 1 As shown, one embodiment of this application proposes a camera lens, which may include a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the inner diameter of the image side of the lens barrel P0 is larger than the inner diameter of the object side; the lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens E1 with positive optical power, a second lens E2 with negative optical power, a third lens E3 with positive optical power, a fourth lens E4 with negative optical power, and a fifth lens E5 with optical power, each lens having an effective diameter region for refracting light and a region from the effective diameter region. The region is a non-effective diameter area extending in a direction away from the optical axis. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4; the camera lens satisfies:

[0073] -1.73 <f3 / R6 / (N3-1)<-1.12;

[0074] 2.10 < (EP12 + EP23) / EP34 < 2.75;

[0075] -10.20mm <f4 / (CT4 / EP34)<-4.80mm;

[0076] Where f3 is the effective focal length of the third lens E3, R6 is the radius of curvature of the image side of the third lens E3, N3 is the refractive index of the third lens E3, EP12 is the distance between the first spacer P1 and the second spacer P2 in the optical axis direction, EP23 is the distance between the second spacer P2 and the third spacer P3 in the optical axis direction, EP34 is the distance between the third spacer P3 and the fourth spacer P4 in the optical axis direction, f4 is the effective focal length of the fourth lens E4, and CT4 is the center thickness of the fourth lens E4.

[0077] It is worth noting that the camera lens of this application distributes the optical power of the first four lenses in a positive-negative-positive-negative order along the optical axis, and sets the third lens as a lens with a high refractive index, constraining the focal length f3, the image-side curvature radius R6, and the refractive index N3 of the third lens E3 to satisfy the aforementioned condition. Because the shape of the third lens E3 is affected by the processing and molding, the transition between the effective diameter region and the ineffective diameter region is made as smooth as possible. The thickness of the ineffective diameter region of the third lens E3 is relatively thin, posing a risk of cracking during assembly. When the effective diameter region of the lens is determined, simply increasing the thickness of the ineffective diameter region of the third lens E3 can easily lead to inversion at the side edges of the lens. When the surface shapes of two adjacent lenses facing each other differ significantly, the curvature of the lens edges also needs to be increased accordingly. This increases the difficulty of lens processing, post-processing, and inspection, undoubtedly increasing production costs and making it impossible to guarantee the yield of lens production. Therefore, in this application, the relationship between the spacing distances EP12, EP23, and EP34 between the first four lenses and the focal length f4 and median thickness CT4 of the fourth lens E4 is constrained to ensure that the edge thickness of the third lens E3 is within a reasonable range and that the fourth lens E4 does not interfere with the third lens E3. This reduces the risk of breakage of the third lens E3 during assembly and reduces the processing difficulty of each lens in the lens group, which helps to improve product yield and reduce manufacturing costs.

[0078] Furthermore, the first lens E1 has a convex object-side surface and a concave image-side surface; the second lens E2 has a convex object-side surface and a concave image-side surface; the third lens E3 has a convex image-side surface; the fourth lens E4 has a concave object-side surface and a convex image-side surface; and the fifth lens E5 has a convex object-side surface and a concave image-side surface. The first two lenses have convex object-side surfaces and concave image-side surfaces, which facilitates light convergence and provides a sufficient field of view for the lens. The latter two lenses have concave object-side surfaces and convex image-side surfaces, which facilitates light divergence. By rationally controlling the degree of concavity and convexity of the object and image sides, the light passing through the lens is perfectly imaged onto an image plane of the required size.

[0079] For example, Figure 14 The diagram shows a partial structural schematic of the camera lens when f3 / R6 / (N3-1)=-1.71; (EP12+EP23) / EP34=1.80; f4 / (CT4 / EP34)=-11.80mm. As can be seen from the diagram, when EP23 decreases and EP34 increases, the third spacer element P3 needs to be bent during the assembly of the camera lens to ensure a tight fit between the third lens E3 and the fourth lens E4. However, bending the third spacer element P3 requires a large compressive force, which can easily lead to the risk of cracking at the edge of the third lens E3. At the same time, it is also impossible to ensure that the fourth and fifth lenses E5 are assembled in place. Figure 15A partial structural diagram of a camera lens is shown when f3 / R6 / (N3-1)=-1.71; (EP12+EP23) / EP34=2.16; f4 / (CT4 / EP34)=-10.19mm is provided. This is a partial structural diagram of a camera lens that meets the condition range provided in this application. As can be seen from the figure, the third spacer element P3 does not need to be bent, and the edge of the third lens E3 does not need to be curved. This reduces the assembly difficulty and production cost while meeting the lens performance requirements. Figure 16 The diagram shows a partial structural schematic of the camera lens when f3 / R6 / (N3-1)=-1.71; (EP12+EP23) / EP34=3; f4 / (CT4 / EP34)=-4.40mm. As can be seen from the figure, when EP23 increases and EP34 decreases, the edge of the third lens E3 needs to be curved. This places high demands on the precision of the mold processing, poses a risk of tearing during demolding, and makes post-processing and inspection more difficult.

[0080] Preferably, the camera lens satisfies the following conditions: -1.71≤f3 / R6 / (N3-1)≤-1.14; 2.13≤(EP12+EP23) / EP34≤2.71; -10.19mm≤f4 / (CT4 / EP34)≤-4.82mm.

[0081] According to some embodiments of this application, the center thickness CT3 of the third lens E3, the spacing EP23 between the second spacer element P2 and the third spacer element P3 in the optical axis direction, and the refractive index N3 of the third lens E3 satisfy the following: 1.70 <N3<1.90;1.40<CT3 / EP23<1.80。

[0082] In this way, the third lens E3 is a glass lens with a relatively high refractive index, which can reduce the temperature drift in the central field of view. By controlling the refractive index of the third lens E3 and the ratio of the center thickness to the edge thickness within a suitable range, it helps to avoid the situation where the center thickness of the lens is too large and the edge diameter of the lens is too small, thereby reducing the processing difficulty and the risk of edge breakage.

[0083] Preferably, the camera lens satisfies: 1.77≤N3≤1.814; 1.43≤CT3 / EP23≤1.78.

[0084] According to some embodiments of this application, the inner diameter d0m of the image side surface of the lens barrel P0 and the inner diameter d0s of the object side surface of the lens barrel P0 satisfy the following condition: 2.05 <d0m / d0s<2.65。

[0085] In this way, by constraining the relationship between the inner diameter of the image side and the inner diameter of the object side of the lens barrel P0, it is helpful for the design of lens assembly and support fixtures; at the same time, it is very beneficial for the extinction of imaging light in the non-effective area of ​​the fifth lens E5, avoiding the generation of stray light or light leakage that affects image quality.

[0086] Preferably, the camera lens satisfies: 2.06≤d0m / d0s≤2.60.

[0087] According to some embodiments of this application, the effective focal length f3 of the third lens E3, the refractive index N3 of the third lens E3, and the spacing EP23 between the second spacer element P2 and the third spacer element P3 in the optical axis direction satisfy: 2.30 <f3 / N3 / EP23<3.05。

[0088] In this way, by constraining the effective focal length and refractive index of the third lens E3, it is helpful to control the light passing through the third lens E3 to ensure the overall machinability of the lens while satisfying the requirement of complementary optical power; at the same time, by controlling the spacing between the second spacer element P2 and the third spacer element P3 in the optical axis direction, it is helpful to control the edge thickness of the third lens E3 and reduce the molding difficulty of the third lens E3.

[0089] Preferably, the camera lens satisfies: 2.32≤f3 / N3 / EP23≤3.02.

[0090] According to some embodiments of this application, the center thickness of the third lens E3 is greater than the center thickness of the other lenses, and the maximum thickness of the non-effective diameter region of the third lens E3 is greater than the maximum thickness of the non-effective diameter regions of the second lens E2 and the fourth lens E4; the center thickness CT3 of the third lens E3, the center thickness CT2 of the second lens E2, and the center thickness CT4 of the fourth lens E4 satisfy the following condition: 1.35 <CT3 / (CT2+CT4)<2.05。

[0091] In this way, the third lens E3 is a lens with a thicker center and a higher refractive index, which is beneficial to reducing the temperature drift in the center field of view. The reasonable setting of the edge thickness and center thickness of the second lens E2, the third lens E3, and the fourth lens E4 is beneficial to the refraction of light and the shaping of the lens.

[0092] Preferably, the camera lens satisfies: 1.38≤CT3 / (CT2+CT4)≤2.04.

[0093] According to some embodiments of this application, the outer diameter D3s of the side surface of the third spacer element P3 and the inner diameter d2s of the side surface of the second spacer element P2 satisfy the following condition: 1.85 <D3s / d2s<2.60。

[0094] In this way, the light path can be effectively controlled by the conditional constraint, avoiding the problem of excessive sensitivity of the lens caused by excessively steep light. By controlling the size range of the inner diameter of the two spacer elements, excess light can be blocked, which helps to improve the overall stray light of the lens.

[0095] Preferably, the camera lens satisfies: 1.89≤D3s / d2s≤2.56.

[0096] According to some embodiments of this application, the outer diameter D3m of the image side of the third spacer element P3, the inner diameter d3s of the object side of the third spacer element P3, and the maximum thickness CP3 of the third spacer element P3 satisfy the following condition: 34.05 < (D3m - d3s) / CP3 < 85.15.

[0097] In this way, the third spacer element P3 and the third lens E3 are located in the same lens section. Controlling the outer diameter of the third spacer element P3 is beneficial to the processing and shaping of the third lens. At the same time, through the constraint of this conditional formula, it is beneficial to prevent the radial wobble of the spacer element in the lens, thereby improving the overall stray light performance of the lens.

[0098] Preferably, the camera lens satisfies: 34.07≤(D3m-d3s) / CP3≤85.13.

[0099] According to some embodiments of this application, the outer diameter D3m of the image side of the third spacer element P3, the inner diameter d3s of the object side of the third spacer element P3, the inner diameter d3m of the image side of the third spacer element P3, the outer diameter D4s of the object side of the fourth spacer element P4, and the inner diameter d4s of the object side of the fourth spacer element P4 satisfy the following: 0.50 < (D3m - d3s) / d3m < 0.83, 0.80 < (D4s - d3s) / d4s < 1.10.

[0100] In this way, by controlling the parameter relationship between the inner and outer diameters of the object side and the image side of the third spacer element P3 and the inner and outer diameters of the object side and the image side of the fourth spacer element P4 within a certain range, the total deflection angle of the edge field of view on the two surfaces can be reasonably controlled within a reasonable range, which can effectively reduce the sensitivity of the system. At the same time, it helps to control the bearing area between the image side of the third and fourth spacer elements P4 and the adjacent elements, thereby improving the assembly stability.

[0101] Preferably, the camera lens satisfies: 0.53≤(D3m-d3s) / d3m≤0.81, 0.83≤(D4s-d3s) / d4s≤1.06.

[0102] According to some embodiments of this application, the air gap T23 between the second lens E2 and the third lens E3 on the optical axis, the air gap T34 between the third lens E3 and the fourth lens E4 on the optical axis, the maximum thickness CP2 of the second spacer element P2, and the maximum thickness CP3 of the third spacer element P3 satisfy the following: 5.4≤(T23+T34) / (CP2+CP3)<9.8.

[0103] Thus, by constraining this condition, setting spacer elements of reasonable thickness between the second lens E2 and the third lens E3, and between the third lens E3 and the fourth lens E4, helps to reduce the impact of the spacer elements on the air gap, and the reasonable thickness of the spacer elements helps to constrain the thickness of the non-effective diameter region of the third lens E3, thereby reducing the difficulty of lens forming.

[0104] Preferably, the camera lens satisfies: 5.40≤(T23+T34) / (CP2+CP3)≤9.75.

[0105] According to some embodiments of this application, the spacing distance EP34 between the third spacer element P3 and the fourth spacer element P4 in the optical axis direction, the air gap T34 between the third lens E3 and the fourth lens E4 in the optical axis, the center thickness CT4 of the fourth lens E4, and the air gap T45 between the fourth lens E4 and the fifth lens E5 in the optical axis satisfy the following: 0.73 <EP34 / (T34+CT4+T45)<0.93。

[0106] Thus, this constraint helps control the edge thickness of the third lens E3, facilitating its fabrication and shaping. Furthermore, controlling the air gaps on the optical axis between the third lens E3 and the fourth lens E4, and between the fourth lens E4 and the fifth lens E5, allows for the selection of spacer elements of appropriate thickness to adjust the field curvature.

[0107] Preferably, the camera lens satisfies: 0.74≤EP34 / (T34+CT4+T45)≤0.91.

[0108] According to some embodiments of this application, the outer diameter D0s of the object side of the lens barrel P0, the effective focal length f of the camera lens, and half of the maximum field of view (Semi-FOV) of the camera lens satisfy the following: 1.25 <D0s / (f*tan(Semi-FOV))<1.40。

[0109] In this way, by controlling the relationship between the outer diameter of the front face of the lens barrel P0, the effective focal length, and the maximum field of view, the amount of light can be effectively controlled, and the light can be used to participate in imaging more efficiently. At the same time, the light angle of the edge field of view is kept within a reasonable range, which can effectively reduce the sensitivity of the system and obtain good image quality.

[0110] Preferably, the camera lens satisfies: 1.26≤D0s / (f*tan(Semi-FOV))≤1.36.

[0111] According to some embodiments of this application, the image-side surface of the third lens E3 is convex, the object-side surface of the fourth lens E4 is concave, and its image-side surface is convex. The radius of curvature of the image-side surface of the third lens E3 is R6, the radius of curvature of the object-side surface of the fourth lens E4 is R7, and the inner diameter d3s of the object-side surface of the third spacer element P3 satisfies: -1.70 < (R6 + R7) / d3s < -1.25.

[0112] In this way, by controlling this condition, it is beneficial to achieve a compact lens structure, while also helping to correct off-axis aberrations and improve the overall imaging quality of the system.

[0113] Preferably, the camera lens satisfies: -1.68≤(R6+R7) / d3s≤-1.27.

[0114] According to some embodiments of this application, the object-side surface of the fifth lens E5 is convex, its image-side surface is concave, and the optical axis of the fifth lens E5 is meniscus. Both the object-side and image-side surfaces of the fifth lens E5 have at least one inflection point. The distance EP40 between the image-side of the fourth spacer element P4 and the image-side of the lens barrel P0 on the optical axis, and the center thickness CT5 of the fifth lens E5, satisfy the following: 2.20. <EP40 / CT5<2.70。

[0115] In this way, by reasonably controlling the range of this condition, it is beneficial to ensure the feasibility of processing the fifth lens E5. At the same time, controlling the distance on the optical axis from the image side of the fourth spacer element P4 to the image side of the lens barrel P0 is beneficial to lens miniaturization and leaving enough space for adhesive application, so as to ensure that the last lens element, the fifth lens E5, is fixed to the lens with adhesive application.

[0116] Preferably, the camera lens satisfies: 2.24≤EP40 / CT5≤2.66.

[0117] According to another aspect of the present application, the present application further provides a camera lens, including a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the inner diameter of the image side of the lens barrel P0 is greater than the inner diameter of the object side; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens E1 with a positive optical power, the object side of the first lens E1 is convex, and its image side is concave; a second lens E2 with a negative optical power, the object side of the second lens E2 is convex, and its image side is concave; a third lens E3 with a positive optical power, the image side of the third lens E3 is convex; a fourth lens E4 with a negative optical power, the object side of the fourth lens E4 is concave, and its image side is convex; a fifth lens E5 with an optical power, the object side of the fifth lens E5 is convex, and its image side is concave, and at least one anastigmatic point is provided on each of the object side and the image side of the fifth lens E5;

[0118] The spacer assembly includes a plurality of spacer elements, and at least one of the spacer elements is provided between two adjacent lenses in the lens group;

[0119] The camera lens further satisfies:

[0120] 2.05 < d0m / d0s < 2.61; and

[0121] 2.20 < EP40 / CT5 < 2.70;

[0122] where, d0m is the inner diameter of the image side of the lens barrel P0, d0s is the inner diameter of the object side of the lens barrel P0, EP40 is the distance in the optical axis direction from the image side of the fourth spacer element P4 placed on the image side of the fourth lens E4 and in contact with the image side of the fourth lens E4 to the image side of the lens barrel P0, and CT5 is the central thickness of the fifth lens E5.

[0123] In this way, by distributing the optical powers of the first four lenses in a positive-negative-positive-negative manner on the optical axis, and at the same time restricting the inner diameter of the image side and the inner diameter of the object side of the lens barrel P0 to define the shape of the lens barrel P0, the present application's camera lens is beneficial to improving the extinction effect of the imaging light rays in the non-effective area of the fifth lens E5, avoiding the generation of stray light or light leakage that affects the image quality. Further, anastigmatic points need to be arranged on the object side and the image side of the fifth lens E5 to ensure installation, which also brings difficulties to the processing and assembly of the fifth lens E5. By further restricting the relationship between the distance in the optical axis direction from the image side of the fourth spacer element P4 to the image side of the lens barrel P0 and the central thickness of the fifth lens E5, it is beneficial to reduce the processing difficulty of the fifth lens E5 and ensure the glue fixation between the fifth lens E5 and the lens barrel P0.

[0124] It should be noted that those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of spacers constituting the camera lens can be changed to obtain the various results and advantages described in this specification, and this application does not impose specific limitations in this regard. For example, as needed, the optical imaging lens may also include other numbers of spacers than those described in the above embodiments.

[0125] The following describes in more detail, with reference to the accompanying drawings, some specific, but not limiting, embodiments of the above-described embodiments of this application. For ease of description, in the following embodiments, OBJ represents the object plane of the camera 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, S10 represents the image-side surface of the fifth lens E5, S11 and S12 represent the object-side surface and image-side surface of the filter in the sensing assembly, respectively, and S13 represents the receiving surface of the sensor in the sensing assembly. Furthermore, Aj represents the j-th order aspherical coefficient, j = 4, 6, 8, 10, 12, 14, 16, 18, 20.

[0126] Example 1

[0127] like Figures 2 to 4 As shown, in this embodiment, the camera lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens E1 with positive optical power, a second lens E2 with negative optical power, a third lens E3 with positive optical power, a fourth lens E4 with negative optical power, and a fifth lens E5 with negative optical power; the spacer assembly in operating conditions 2-1, 2-2, and 2-2 includes a first spacer element P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1, a second spacer element P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2, a third spacer element P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3, and a fourth spacer element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4.

[0128] In this embodiment, the object-side surface S1 and the image-side surface S2 of the first lens E1 are convex and concave, respectively; the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave, respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are both convex; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex, respectively; and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are convex and concave, respectively.

[0129] It is worth noting that the differences between the three operating conditions 1-1, 1-2, and 1-3 in Example 1 lie in the differences in the spacer element, the non-effective diameter region of the lens, and the lens barrel parameters. Specifically, these are the differences in the structural data in Table 8 (such as d2s, d3s, d3m, D3s, D3m, d4s, D4s, d0s, d0m, D0s, EP12, CP2, EP23, CP3, EP34, EP40). However, the shape and size data of the effective diameter region of the lens are the same, meaning that the optical parameters of the camera lens in the three operating conditions share the data in Tables 1 and 2.

[0130] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Embodiment 1, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0131] Table 1: Basic Optical Parameters of the Camera Lens in Example 1

[0132] Face number Face type Radius of curvature Thickness Material Conic constant OBJ Sphere Infinity 500 STO Sphere Infinity -0.0924 S1 Asphere 1.2776 0.3028 1.546,56.01 -8.4749 S2 Asphere 4.6510 0.2147 -1.3506 S3 Asphere 4.1767 0.2118 1.667,20.37 40.8214 S4 Asphere 1.8408 0.1129 -6.9713 S5 Asphere 6.3913 0.7161 1.814,40.99 -99.0000 S6 Asphere -2.3612 0.1789 0.7597 S7 Asphere -0.6409 0.2000 1.667,20.37 -3.4991 S8 Asphere -0.9635 0.0300 -2.5318 S9 Asphere 0.7516 0.4246 1.546,56.01 -2.5847 S10 Asphere 0.7143 0.3895 -2.0457 S11 Sphere Infinity 0.1500 1.517,64.2 S12 Sphere Infinity 0.4064 S13 Sphere Infinity

[0133] It should be noted that the materials in Table 1 include the refractive index and Abbe number of the lens at a wavelength of 555 nm. For example, in Table 1, the materials 1.546 and 56.01 for S1 respectively indicate that the refractive index of the first lens E1 is 1.546 and the Abbe number is 56.01. Furthermore, in this embodiment, the third lens E3 can be implemented as a glass lens, while the first lens E1, the second lens E2, the fourth lens E4, and the fifth lens E5 can be implemented as plastic lenses to reduce the weight of the lens and improve ease of use.

[0134] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0135]

[0136] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror S1 to S10 in Example 1.

[0137] Table 2: Aspherical coefficient table of the camera lens in Example 1

[0138] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.37E-01 1.21E+00 -4.61E+01 6.28E+02 -5.10E+03 2.56E+04 -7.82E+04 S2 -9.15E-02 -1.34E+00 3.09E+01 -4.29E+02 3.68E+03 -1.97E+04 6.35E+04 S3 -5.99E-01 2.10E+00 -2.91E+01 2.71E+02 -1.65E+03 6.50E+03 -1.60E+04 S4 -3.26E-01 1.40E+00 -8.57E+00 4.38E+01 -1.55E+02 3.74E+02 -5.84E+02 S5 -1.04E-01 5.56E-01 -2.89E+00 8.89E+00 -1.18E+01 -1.55E+01 8.03E+01 S6 -3.65E-01 -4.87E-02 -2.98E-01 1.11E+01 -4.14E+01 7.23E+01 -6.91E+01 S7 6.61E-01 -1.34E+01 7.62E+01 -2.26E+02 4.08E+02 -4.75E+02 3.54E+02 S8 1.07E-01 -4.24E+00 2.43E+01 -6.00E+01 7.99E+01 -5.87E+01 2.06E+01 S9 -1.57E+00 3.21E+00 -5.99E+00 9.16E+00 -1.18E+01 1.24E+01 -9.77E+00 S10 -7.39E-01 6.28E-01 3.02E-01 -1.58E+00 2.02E+00 -1.38E+00 5.50E-01 Face number A18 A20 S1 1.32E+05 -9.52E+04 S2 -1.13E+05 8.54E+04 S3 2.22E+04 -1.34E+04 S4 5.40E+02 -2.27E+02 S5 -1.05E+02 4.69E+01 S6 3.50E+01 -7.37E+00 S7 -1.56E+02 3.16E+01 S8 -9.70E-01 -9.08E-01 S9 4.83E+00 -1.05E+00 S10 -1.19E-01 1.08E-02

[0139] In the three operating conditions of Example 1, the on-axis chromatic aberration of the camera lens is as follows: Figure 5A As shown, this indicates the degree of deviation of the focal point of light of different wavelengths after passing through the camera lens; the magnification chromatic aberration curves of the camera lens in the three working conditions of Example 1 are as follows. Figure 5B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. According to... Figure 5A and Figure 5B It can be seen that the camera in the three working conditions of Example 1 can achieve good imaging quality.

[0140] Example 2

[0141] like Figures 6 to 8 As shown, in this embodiment, the camera lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens E1 with positive optical power, a second lens E2 with negative optical power, a third lens E3 with positive optical power, a fourth lens E4 with negative optical power, and a fifth lens E5 with positive optical power; the spacer assembly in operating conditions 2-1, 2-2, and 2-2 includes a first spacer element P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1, a second spacer element P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2, a third spacer element P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3, and a fourth spacer element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4.

[0142] In this embodiment, the object-side surface S1 and the image-side surface S2 of the first lens E1 are convex and concave, respectively; the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave, respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are both convex; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex, respectively; and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are convex and concave, respectively.

[0143] It is worth noting that the differences between the three operating conditions 2-1, 2-2, and 2-3 in Embodiment 2 lie in the differences in the spacing element, the non-effective diameter area of ​​the lens, and the size of the lens barrel. Specifically, these are the differences in the structural data in Table 8 (such as d2s, d3s, d3m, D3s, D3m, d4s, D4s, d0s, d0m, D0s, EP12, CP2, EP23, CP3, EP34, EP40). However, the number of lenses, the shape and size of the effective diameter area of ​​the lens are the same, meaning that the optical parameters of the camera lens in the three operating conditions share the data in Tables 3 and 4.

[0144] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Embodiment 2, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0145] Table 3: Basic optical parameters of the camera lens in Example 2

[0146] Face number Face type Radius of curvature Thickness Material Conic constant OBJ Sphere Infinity 500 STO Sphere Infinity -0.0882 S1 Asphere 1.2606 0.2901 1.546,56.01 0.1493 S2 Asphere 3.7775 0.1583 26.3282 S3 Asphere 2.2140 0.2000 1.619.25.97 9.3722 S4 Asphere 1.3521 0.1387 1.8454 S5 Asphere 5.6267 0.8150 1.77,49.61 8.3354 S6 Asphere -2.1520 0.1707 1.1225 S7 Asphere -0.6385 0.2000 1.678,19.24 -1.1268 S8 Asphere -1.0506 0.0300 -0.2711 S9 Asphere 0.6941 0.3811 1.537,19.24 -0.9812 S10 Asphere 0.7053 0.3676 -1.0420 S11 Sphere Infinity 0.1500 1.517,64.2 S12 Sphere Infinity 0.4289 S13 Sphere Infinity

[0147] It should be noted that the materials in Table 3 include the refractive index and Abbe number of the lens at a wavelength of 555 nm. For example, in Table 3, the materials 1.546 and 56.01 for S1 respectively indicate that the refractive index of the first lens E1 is 1.546 and the Abbe number is 56.01. Furthermore, in this embodiment, the third lens E3 can be implemented as a glass lens, while the first lens E1, the second lens E2, the fourth lens E4, and the fifth lens E5 can be implemented as plastic lenses, which helps to reduce the weight of the lens and improve ease of use.

[0148] Table 4 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror S1 to S10 in Example 2.

[0149] Table 4: Aspherical coefficient table of the camera lens in Example 2

[0150] Face number A4 A6 A8 A10 A12 A14 A16 S1 -7.86E-02 1.25E+00 -2.65E+01 3.33E+02 -2.59E+03 1.25E+04 -3.65E+04 S2 -3.54E-01 2.86E-01 4.01E+00 -1.01E+02 1.13E+03 -7.20E+03 2.65E+04 S3 -9.65E-01 4.08E+00 -5.63E+01 5.61E+02 -3.52E+03 1.39E+04 -3.40E+04 S4 -6.92E-01 7.18E-01 2.85E+00 -4.10E+01 2.64E+02 -9.81E+02 2.11E+03 S5 -7.02E-02 1.25E-01 7.30E-01 -1.25E+01 7.21E+01 -2.21E+02 3.78E+02 S6 -5.10E-01 2.27E+00 -1.08E+01 3.87E+01 -9.20E+01 1.42E+02 -1.38E+02 S7 -2.35E-01 5.37E+00 -3.27E+01 1.28E+02 -3.16E+02 4.88E+02 -4.57E+02 S8 -2.75E+00 2.74E+01 -1.38E+02 4.29E+02 -8.48E+02 1.06E+03 -8.19E+02 S9 -4.47E+00 2.86E+01 -1.33E+02 3.85E+02 -7.07E+02 8.24E+02 -5.90E+02 S10 -1.18E+00 1.69E+00 -2.36E+00 2.71E+00 -2.29E+00 1.32E+00 -4.79E-01 Face number A18 A20 S1 5.93E+04 -4.10E+04 S2 -5.24E+04 4.31E+04 S3 4.66E+04 -2.76E+04 S4 -2.43E+03 1.15E+03 S5 -3.32E+02 1.16E+02 S6 7.61E+01 -1.82E+01 S7 2.38E+02 -5.27E+01 S8 3.53E+02 -6.52E+01 S9 2.37E+02 -4.08E+01 S10 9.91E-02 -8.82E-03

[0151] In the three operating conditions of Example 2, the on-axis chromatic aberration of the camera lens is as follows: Figure 9AAs shown, this indicates the degree of deviation of the focal point of light of different wavelengths after passing through the camera lens; the magnification chromatic aberration curves of the camera lens in the three working conditions of Example 2 are as follows. Figure 9B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. According to... Figure 9A and Figure 9B It can be seen that the camera in the three working conditions of Embodiment 2 can achieve good imaging quality.

[0152] Example 3

[0153] like Figures 10 to 12 As shown, in this embodiment, the camera lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens E1 with positive optical power, a second lens E2 with negative optical power, a third lens E3 with positive optical power, a fourth lens E4 with negative optical power, and a fifth lens E5 with negative optical power; the spacer assembly in operating conditions 3-1, 3-2, and 3-2 includes a first spacer element P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1, a second spacer element P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2, a third spacer element P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3, and a fourth spacer element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4.

[0154] In this embodiment, the object-side surface S1 and the image-side surface S2 of the first lens E1 are convex and concave, respectively; the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave, respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are concave and convex, respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex, respectively; and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are convex and concave, respectively.

[0155] It is worth noting that the differences between the three operating conditions 3-1, 3-2, and 3-3 in Embodiment 3 lie in the size differences of the spacer element, the non-effective diameter area of ​​the lens, and the lens barrel. Specifically, these are the differences in the structural data in Table 8 (such as d2s, d3s, d3m, D3s, D3m, d4s, D4s, d0s, d0m, D0s, EP12, CP2, EP23, CP3, EP34, EP40). However, the number of lenses, the shape and size of the effective diameter area of ​​the lens are the same, meaning that the optical parameters of the camera lens in the three operating conditions share the data in Tables 5 and 6.

[0156] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Embodiment 3, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0157] Table 5: Basic optical parameters of the camera lens in Example 3

[0158] Face number Face type Radius of curvature Thickness Material Conic constant OBJ Sphere Infinity 500 S1 Asphere 1.4825 0.3909 1.546,56.11 -1.8349 S2 Asphere 36.5176 -0.0046 -99.0000 STO Sphere Infinity 0.0818 S3 Asphere 2.1475 0.2000 1.667,20.37 2.8451 S4 Asphere 1.4029 0.1503 0.3812 S5 Asphere -35.1374 0.6608 1.777,49.6 -99.0000 S6 Asphere -1.4307 0.1519 -0.7620 S7 Asphere -0.6080 0.2800 1.678,19.24 -0.4898 S8 Asphere -0.8214 0.0901 -2.5333 S9 Asphere 1.0730 0.3994 1.537,55.65 -1.1624 S10 Asphere 0.7031 0.3795 -4.4298 S11 Sphere Infinity 0.1500 1.517,64.2 S12 Sphere Infinity 0.4000 S13 Sphere Infinity

[0159] It should be noted that the materials in Table 5 include the refractive index and Abbe number of the lens at a wavelength of 555 nm. For example, in Table 5, the materials 1.546 and 56.01 for S1 respectively indicate that the refractive index of the first lens E1 is 1.546 and the Abbe number is 56.01. Furthermore, in this embodiment, the third lens E3 can be implemented as a glass lens, while the first lens E1, the second lens E2, the fourth lens E4, and the fifth lens E5 can be implemented as plastic lenses, which helps to reduce the weight of the lens and improve ease of use.

[0160] Table 6 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical mirror S1 to S10 in Example 3.

[0161] Table 6: Aspherical coefficient table of the camera lens in Example 3

[0162] Face number A4 A6 A8 A10 A12 A14 A16 S1 -9.93E-03 1.50E-01 -1.54E+00 4.65E+00 -8.54E+00 4.57E+00 0.00E+00 S2 -6.25E-01 3.08E+00 -1.77E+01 7.34E+01 -1.83E+02 1.88E+02 0.00E+00 S3 -9.16E-01 2.61E+00 -4.25E+00 -1.15E+01 6.51E+01 -9.30E+01 0.00E+00 S4 -6.07E-01 1.60E+00 -3.79E+00 5.00E+00 -6.55E+00 5.43E+00 0.00E+00 S5 -1.32E-01 -1.77E-01 2.03E+00 -9.31E+00 1.92E+01 -1.36E+01 0.00E+00 S6 -1.43E-02 -8.65E-01 5.60E+00 -1.74E+01 2.92E+01 -2.60E+01 1.00E+01 S7 1.67E+00 -6.04E+00 2.79E+01 -7.50E+01 1.19E+02 -1.04E+02 3.92E+01 S8 4.60E-02 -2.49E-01 2.59E+00 -6.51E+00 8.49E+00 -5.96E+00 1.72E+00 S9 -1.43E+00 2.10E+00 -2.57E+00 1.93E+00 -5.53E-01 -2.18E-01 1.42E-01 S10 -4.26E-01 4.70E-01 -3.84E-01 1.80E-01 -3.83E-02 -1.80E-03 1.51E-03

[0163] In the three operating conditions of Example 3, the on-axis chromatic aberration of the camera lens is as follows: Figure 13A As shown, this indicates the degree of deviation of the focal point of light of different wavelengths after passing through the camera lens; the magnification chromatic aberration curves of the camera lens in the three working conditions of Example 3 are as follows. Figure 13B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. According to... Figure 13A and Figure 13B It can be seen that the camera in the three working conditions of Embodiment 3 can achieve good imaging quality.

[0164] In summary, in Embodiments 1 to 3, the effective focal lengths f1 to f5 of the first lens E1 to the fifth lens E5 in the camera lens, the effective focal length f of the camera lens, and half of the maximum field of view (Semi-FOV) of the camera lens are shown in Table 7 below.

[0165] Table 7: System Optical Parameters of Camera Lens

[0166] Optical parameters Example one Example two Example three Semi-FOV (°) 40.387 39.785 38.918 f (mm) 2.303 2.302 2.323 f1 (mm) 3.129 3.327 2.819 f2 (mm) -5.122 -6.155 -6.795 f3 (mm) 2.200 2.100 1.904 f4 (mm) -3.818 -2.989 -7.355 f5 (mm) 8.736 6.308 -6.100

[0167] In addition, some structural parameters of the camera lens under various working conditions in Examples 1 to 3 are shown in Table 8.

[0168] Table 8: Partial Structural Parameters of Camera Lens

[0169] Parameter \ data 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 d2s 1.456 1.430 1.512 1.456 1.435 1.562 1.160 1.079 1.197 d3s 1.795 1.792 1.850 1.818 1.801 1.923 1.566 1.556 1.603 d3m 1.795 1.792 1.850 1.818 1.801 1.923 1.566 1.556 1.603 D3s 2.840 2.813 2.896 2.840 2.819 2.945 2.840 2.759 2.877 D3m 2.840 2.813 2.896 2.840 2.819 2.945 2.840 2.759 2.877 d4s 2.048 2.044 2.122 2.048 2.027 2.153 1.925 1.844 1.962 D4s 3.600 3.573 3.656 3.600 3.579 3.705 3.600 3.519 3.637 d0s 1.478 1.460 1.543 1.478 1.466 1.592 1.829 1.748 1.866 d0m 3.823 3.790 3.888 3.826 3.801 3.936 3.810 3.729 3.847 D0s 2.495 2.468 2.550 2.495 2.474 2.600 2.488 2.408 2.526 EP12 0.393 0.394 0.385 0.387 0.391 0.383 0.373 0.377 0.365 CP2 0.018 0.019 0.030 0.018 0.016 0.019 0.018 0.012 0.030 EP23 0.410 0.413 0.401 0.490 0.491 0.478 0.458 0.461 0.451 CP3 0.018 0.012 0.024 0.018 0.018 0.030 0.018 0.019 0.019 EP34 0.368 0.372 0.357 0.326 0.325 0.323 0.388 0.388 0.384 EP40 0.987 0.951 1.032 0.987 0.968 1.014 0.987 0.972 1.022

[0170] In summary, the camera lenses in each working condition of Examples 1 to 3 satisfy the relationship shown in Table 9, as detailed in Table 9.

[0171] Table 9: Relationships Satisfied by Camera Lenses

[0172] Conditional expression \ data 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 f3 / R6 / (N3-1) -1.14 -1.14 -1.14 -1.26 -1.26 -1.26 -1.71 -1.71 -1.71 CT3 / EP23 1.75 1.74 1.78 1.66 1.66 1.71 1.44 1.43 1.46 (EP12+EP23) / EP34 2.18 2.17 2.20 2.69 2.71 2.67 2.14 2.16 2.13 f4 / (CT4 / EP34) -7.02 -7.10 -6.82 -4.87 -4.86 -4.82 -10.18 -10.19 -10.09 d0m / d0s 2.59 2.60 2.52 2.59 2.59 2.47 2.08 2.13 2.06 f3 / N3 / EP23 2.96 2.94 3.02 2.41 2.41 2.47 2.34 2.32 2.37 CT3 / (CT2+CT4) 1.74 1.74 1.74 2.04 2.04 2.04 1.38 1.38 1.38 D3s / d2s 1.95 1.97 1.92 1.95 1.96 1.89 2.45 2.56 2.40 (D3m-d3s) / CP3 58.06 85.13 43.55 56.78 56.59 34.07 70.81 63.32 67.08 (D3m-d3s) / d3m 0.58 0.57 0.56 0.56 0.57 0.53 0.81 0.77 0.80 (D4s-d3s) / d4s 0.88 0.87 0.85 0.87 0.88 0.83 1.06 1.06 1.04 (T23+T34) / (CP2+CP3) 8.10 9.41 5.40 8.60 9.10 6.31 8.39 9.75 6.17 EP34 / (T34+CT4+T45) 0.90 0.91 0.87 0.81 0.81 0.81 0.74 0.74 0.74 D0s / (f*tan(Semi-FOV)) 1.27 1.26 1.30 1.30 1.29 1.36 1.33 1.28 1.35 (R6+R7) / d3s -1.67 -1.68 -1.62 -1.54 -1.55 -1.45 -1.30 -1.31 -1.27 EP40 / CT5 2.32 2.24 2.43 2.59 2.54 2.66 2.47 2.43 2.56

[0173] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0174] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A camera lens, characterized in that: The system includes a lens barrel and a lens group and a spacer assembly housed within the lens barrel; the inner diameter of the image-side surface of the lens barrel is larger than the inner diameter of the object-side surface; the lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with negative optical power, and a fifth lens with optical power, each lens having an effective diameter region for refracting light and a non-effective diameter region extending from the effective diameter region in a direction away from the optical axis; the spacer assembly includes a first spacer element placed on the image side of the first lens and in contact with the image-side surface of the first lens, a second spacer element placed on the image side of the second lens and in contact with the image-side surface of the second lens, a third spacer element placed on the image side of the third lens and in contact with the image-side surface of the third lens, and a fourth spacer element placed on the image side of the fourth lens and in contact with the image-side surface of the fourth lens; the camera lens satisfies: -1.73 <f3 / R6 / (N3-1)<-1.12; 2.10 < (EP12 + EP23) / EP34 < 2.75; -10.20mm <f4 / (CT4 / EP34)<-4.80mm; Wherein, f3 is the effective focal length of the third lens, R6 is the radius of curvature of the image side surface of the third lens, N3 is the refractive index of the third lens, EP12 is the distance between the first and second spacers in the optical axis direction, EP23 is the distance between the second and third spacers in the optical axis direction, EP34 is the distance between the third and fourth spacers in the optical axis direction, f4 is the effective focal length of the fourth lens, and CT4 is the center thickness of the fourth lens.

2. The camera lens according to claim 1, characterized in that, The object-side surface of the first lens is convex, and its image-side surface is concave; the object-side surface of the second lens is convex, and its image-side surface is concave.

3. The camera lens according to claim 1, characterized in that, The center thickness CT3 of the third lens, the spacing EP23 between the second spacer element and the third spacer element in the optical axis direction, and the refractive index N3 of the third lens satisfy the following: 1.70 <N3<1.90;1.40<CT3 / EP23<1.80。 4. The camera lens according to claim 1, characterized in that, The inner diameter d0m of the image side surface of the microscope tube and the inner diameter d0s of the object side surface of the microscope tube satisfy the following: 2.05 <d0m / d0s<2.65。 5. The camera lens according to claim 1, characterized in that, The effective focal length f3 of the third lens, the refractive index N3 of the third lens, and the spacing EP23 between the second spacer element and the third spacer element in the optical axis direction satisfy the following: 2.30 <f3 / N3 / EP23<3.05。 6. The camera lens according to claim 5, characterized in that, The center thickness of the third lens is greater than the center thickness of the other lenses, and the maximum thickness of the non-effective diameter region of the third lens is greater than the maximum thickness of the non-effective diameter regions of the second and fourth lenses; the center thickness CT3 of the third lens, the center thickness CT2 of the second lens, and the center thickness CT4 of the fourth lens satisfy the following: 1.35 <CT3 / (CT2+CT4)<2.05。 7. The camera lens according to claim 1, characterized in that, The outer diameter D3s of the third spacer element and the inner diameter d2s of the second spacer element satisfy the following: 1.85 <D3s / d2s<2.60。 8. The camera lens according to claim 1, characterized in that, The outer diameter D3m of the image side of the third spacer element, the inner diameter d3s of the object side of the third spacer element, and the maximum thickness CP3 of the third spacer element satisfy the following: 34.05 < (D3m-d3s) / CP3 < 85.

15.

9. The camera lens according to claim 1, characterized in that, The outer diameter D3m of the image side of the third spacer element, the inner diameter d3s of the object side of the third spacer element, the outer diameter D4s of the object side of the fourth spacer element, and the inner diameter d4s of the object side of the fourth spacer element satisfy the following: 0.50<(D3m-d3s) / d3m<0.83, 0.80<(D4s-d3s) / d4s<1.

10.

10. The camera lens according to claim 1, characterized in that, The air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, the maximum thickness CP2 of the second spacer element, and the maximum thickness CP3 of the third spacer element satisfy the following: 5.40≤(T23+T34) / (CP2+CP3)<9.

80.

11. The camera lens according to claim 1, characterized in that, The following conditions must be met: the optical axis spacing distance EP34 between the third and fourth spacer elements, the optical axis air gap T34 between the third and fourth lenses, the center thickness CT4 of the fourth lens, and the optical axis air gap T45 between the fourth and fifth lenses. 0.73 <EP34 / (T34+CT4+T45)<0.93。 12. The camera lens according to claim 1, characterized in that, The outer diameter D0s of the lens barrel, the effective focal length f of the camera lens, and half of the maximum field of view (Semi-FOV) of the camera lens satisfy the following: 1.25 <D0s / (f*tan(Semi-FOV))<1.40。 13. The camera lens according to claim 12, characterized in that, The image-side surface of the third lens is convex; the object-side surface of the fourth lens is concave, and its image-side surface is convex; the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R7 of the object-side surface of the fourth lens, and the inner diameter d3s of the object-side surface of the third spacer element satisfy the following: -1.70<(R6+R7) / d3s<-1.

25.

14. The camera lens according to any one of claims 1 to 13, characterized in that, The object-side surface of the fifth lens is convex, and its image-side surface is concave; the fifth lens is meniscus in the region near the optical axis, and both the object-side and image-side surfaces of the fifth lens have at least one inflection point; the distance EP40 between the image-side surface of the fourth spacer element and the image-side surface of the lens barrel on the optical axis, and the center thickness CT5 of the fifth lens satisfy the following: 2.20 <EP40 / CT5<2.70。

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