An optical imaging system

Abstract

The application relates to an optical imaging system, which comprises a first lens barrel and a second lens barrel arranged in sequence from an object side to an image side along an optical axis direction, wherein the first lens barrel comprises a first lens group, the second lens barrel comprises a second lens group, the first lens group comprises a first lens and a second lens, the second lens group comprises a third lens, a fourth lens, a fifth lens and a sixth lens, a first spacing element is arranged between the first lens and the second lens, and the first spacing element is arranged on an image side surface of the first lens; spacing elements are arranged between adjacent two lenses in the second lens group; an automatic focusing assembly is further arranged between the first lens group and the second lens group; and the optical imaging system further satisfies 1.65 <= La / (CT1+T12) <= 2.99; 2.95 <= Lb / EP45 <= 3.64.

Description

Technical Field

[0001] This invention relates to the field of optical device technology, and in particular to an optical imaging system. Background Technology

[0002] In the field of optical imaging, lens focusing technology has always been a key factor affecting image quality, device performance, and user experience. Traditional focusing technologies have many limitations: slow focusing speed, poor optical axis stability, and high power consumption. With the rapid development of consumer electronics, industrial automation, medical imaging, and other fields, higher demands are being placed on the efficiency and accuracy of focusing technology in imaging devices.

[0003] The autofocus assembly requires a liquid lens to achieve autofocus. Due to the variability of the shape of the liquid lens, space needs to be reserved in the compact layout inside the lens barrel. At the same time, the introduction of the autofocus assembly greatly restricts the freedom of lens design in the optical imaging system, and can easily cause a decrease in the stability of the lens assembly in the lens barrel when realizing the basic wide-angle function of the lens. Summary of the Invention

[0004] One advantage of this application is that it provides an optical imaging system that can ensure the stability of the lens assembly in the second lens barrel while accommodating a compact arrangement of the autofocus components and the second lens group.

[0005] According to one aspect of this application, an optical imaging system is provided, including a first lens barrel and a second lens barrel arranged sequentially from the object side to the image side along the optical axis.

[0006] The first lens barrel contains a first lens group, which includes a first lens with negative optical power and a second lens with positive optical power, wherein the object side of the second lens is convex and the image side is concave.

[0007] A first spacer element is provided between the first lens and the second lens, and the first spacer element abuts against the image side of the first lens;

[0008] The second lens barrel contains a second lens group, which includes a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power. The object-side surface of the third lens is convex and the image-side surface is concave. The object-side surface and the image-side surface of the fourth lens are both convex. The object-side surface of the fifth lens is convex and the image-side surface is concave. The image-side surface of the sixth lens is concave.

[0009] A third spacer element is provided between the third lens and the fourth lens, and the third spacer element abuts against the image side of the third lens;

[0010] A fourth spacer element is provided between the fourth lens and the fifth lens, and the fourth spacer element abuts against the image side of the fourth lens;

[0011] A fifth spacer element is provided between the fifth lens and the sixth lens, and the fifth spacer element abuts against the image side of the fifth lens;

[0012] An autofocus assembly is also provided between the first lens group and the second lens group;

[0013] The optical imaging system satisfies: 1.65≤La / (CT1+T12)≤2.99; 2.95≤Lb / EP45≤3.64; where La is the maximum height of the first lens barrel, CT1 is the center thickness of the first lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, Lb is the maximum height of the second lens barrel, and EP45 is the distance along the optical axis from the image side of the fourth spacer element to the object side of the fifth spacer element.

[0014] In some embodiments, the optical imaging system satisfies: 2.50 < f34 / (D3s-d3s) < 3.40, where f34 is the combined focal length of the third lens and the fourth lens, D3s is the outer diameter of the side surface of the third spacer element, and d3s is the inner diameter of the side surface of the third spacer element.

[0015] In some embodiments, the optical imaging system satisfies: 4.15 < f12 / (EP01+CP1) < 8.35, where f12 is the combined focal length of the first lens and the second lens, EP01 is the distance along the optical axis from the side of the first lens barrel to the side of the first spacer element, and CP1 is the maximum thickness of the first spacer element along the optical axis.

[0016] In some embodiments, the optical imaging system satisfies: -2.81≤(D1s+D1m) / f1≤-2.40, where D1s is the outer diameter of the object side of the first spacer element, D1m is the outer diameter of the image side of the first spacer element, and f1 is the effective focal length of the first lens.

[0017] In some embodiments, the optical imaging system satisfies: 2.65≤f2 / (Dam-dam)≤3.17, where f2 is the effective focal length of the second lens, Dam is the outer diameter of the image side of the first lens barrel, and dam is the inner diameter of the image side of the first lens barrel.

[0018] In some embodiments, the optical imaging system satisfies: 2.00 < d3m / CT4 < 3.20, where d3m is the inner diameter of the image side of the third spacer element and CT4 is the center thickness of the fourth lens on the optical axis.

[0019] In some embodiments, the optical imaging system satisfies: 1.35≤(D3m+D4m+D5m) / f3456≤3.21, where D3m is the outer diameter of the image-side surface of the third spacer element, D4m is the outer diameter of the image-side surface of the fourth spacer element, D5m is the outer diameter of the image-side surface of the fifth spacer element, and f3456 is the combined focal length of the third lens, the fourth lens, the fifth lens, and the sixth lens.

[0020] In some embodiments, the optical imaging system satisfies: -1.75 < (d4s + d4m) / R8 < -1.40, where d4s is the inner diameter of the object side of the fourth spacer element, d4m is the inner diameter of the image side of the fourth spacer element, and R8 is the radius of curvature of the image side of the fourth lens.

[0021] In some embodiments, the optical imaging system satisfies: 15.98≤dbs / CT3≤19.39, where dbs is the inner diameter of the side of the second lens barrel and CT3 is the center thickness of the third lens on the optical axis.

[0022] In some embodiments, the optical imaging system satisfies: 1.05 < (Dbm - dbm) / (Das - das) < 1.45, where Dbm is the outer diameter of the image side of the second lens barrel, dbm is the inner diameter of the image side of the second lens barrel, Das is the outer diameter of the object side of the first lens barrel, and das is the inner diameter of the object side of the first lens barrel.

[0023] In some embodiments, the optical imaging system satisfies: 3.77≤d1m / CT2≤4.80, where d1m is the inner diameter of the image side of the first spacer element and CT2 is the center thickness of the second lens on the optical axis.

[0024] In some embodiments, the optical imaging system satisfies: 3.41≤d5s / T56≤6.98, where d5s is the inner diameter of the side of the fifth spacer element and T56 is the air gap between the fifth lens and the sixth lens on the optical axis.

[0025] In some embodiments, the optical imaging system satisfies: 1.00 < Dbs / TD < 1.30, where Dbs is the outer diameter of the object side of the second lens barrel, and TD is the axial distance along the optical axis from the object side of the first lens to the image side of the sixth lens.

[0026] In some embodiments, the optical imaging system satisfies: 10.68≤D4s / (EP34+CP4)≤18.77, where D4s is the outer diameter of the object side of the fourth spacer element, EP34 is the distance from the image side of the third spacer element to the object side of the fourth spacer element along the optical axis, and CP4 is the maximum thickness of the fourth spacer element along the optical axis.

[0027] In summary, under the condition of 1.65≤La / (CT1+T12)≤2.99, the optical imaging system requires the first lens group to achieve a wide angle within a relatively compact space. This means that it needs to be compactly arranged with the autofocus assembly and the second lens group along the optical axis. This will cause an assembly misalignment problem within the second lens group, affecting assembly stability. Therefore, this application optimizes the assembly misalignment problem within the second lens group by constraining 2.95≤Lb / EP45≤3.64 and adjusting the height of the second lens barrel and the distance between the fourth and fifth spacers, thereby improving its structural stability and ultimately enhancing assembly stability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the dimensional parameters of an optical imaging system according to one embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the structural parameters of an optical imaging system according to one embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the structure of an optical imaging system according to Embodiment 1 of this application;

[0031] Figure 4 This is a schematic diagram of the structure of an optical imaging system according to Embodiment 2 of this application;

[0032] Figure 5 This is a schematic diagram of the structure of an optical imaging system according to Embodiment 3 of this application;

[0033] Figure 6A A schematic diagram of the on-axis chromatic aberration curves of the optical imaging systems of Embodiment 1, Embodiment 2 and Embodiment 3 according to this application is shown.

[0034] Figure 6B A schematic diagram of astigmatism curves of the optical imaging systems of Embodiment 1, Embodiment 2 and Embodiment 3 according to this application is shown.

[0035] Figure 6C The diagram shows the distortion curves of the optical imaging systems according to Embodiment 1, Embodiment 2 and Embodiment 3 of this application.

[0036] Figure 7 This is a schematic diagram of the structure of an optical imaging system according to Embodiment 4 of this application;

[0037] Figure 8 This is a schematic diagram of the structure of an optical imaging system according to Embodiment 5 of this application;

[0038] Figure 9 This is a schematic diagram of the structure of an optical imaging system according to Embodiment Six of this application;

[0039] Figure 10A A schematic diagram of the on-axis chromatic aberration curves of the optical imaging systems of Embodiments 4, 5, and 6 according to this application is shown.

[0040] Figure 10B A schematic diagram of astigmatism curves of the optical imaging systems of Embodiments 4, 5, and 6 according to this application is shown.

[0041] Figure 10C The diagram shows the distortion curves of the optical imaging systems of Embodiments 4, 5, and 6 according to this application.

[0042] Figure 11 This is a schematic diagram of the structure of an optical imaging system according to Embodiment Seven of this application;

[0043] Figure 12 This is a schematic diagram of the structure of an optical imaging system according to Embodiment 8 of this application;

[0044] Figure 13 This is a schematic diagram of the structure of an optical imaging system according to Embodiment Nine of this application;

[0045] Figure 14A A schematic diagram of the on-axis chromatic aberration curves of the optical imaging systems of Embodiments 7, 8, and 9 according to this application is shown.

[0046] Figure 14B A schematic diagram of astigmatism curves of the optical imaging systems of Embodiments 7, 8, and 9 according to this application is shown.

[0047] Figure 14C A schematic diagram of the distortion curves of the optical imaging systems of Embodiments 7, 8, and 9 according to this application is shown.

[0048] Figure 15 The stress distribution in the second lens barrel is shown when the optical imaging system satisfies La / (CT1+T12)=2.45 and Lb / EP45=3.40.

[0049] Figure 16The stress distribution in the second lens barrel is shown when the optical imaging system satisfies La / (CT1+T12)=2.45 and Lb / EP45=3.92.

[0050] Figure 17 The stress distribution diagram in the second lens barrel is shown when the optical imaging system satisfies La / (CT1+T12)=2.45 and Lb / EP45=2.51. Detailed Implementation

[0051] 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.

[0052] 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.

[0053] 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.

[0054] In this paper, the paraxial region refers to the area near the optical axis. If the lens surface is convex and its location is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and its location 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 by the sign of the R value (R refers to the radius of curvature of the paraxial region). In this paper, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface. For the object-side surface, when the R value is positive, it is considered convex, and when the R value is negative, it is considered concave; for the image-side surface, when the R value is positive, it is considered concave, and when the R value is negative, it is considered convex.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] Please see Figure 1 and Figure 2According to one aspect of this application, an optical imaging system is provided, which may include a first lens barrel and a second lens barrel arranged sequentially from the object side to the image side along the optical axis; the first lens barrel includes a first lens group, the first lens group including a first lens with negative optical power and a second lens with positive optical power, wherein the object side of the second lens is convex and the image side is concave; a first spacer element is provided between the first lens and the second lens, and the first spacer element abuts against the image side of the first lens; the second lens barrel includes a second lens group, the second lens group including a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power and a sixth lens with negative optical power, wherein the object side of the third lens is convex and the image side is concave, the object side of the fourth lens is convex and the image side is convex, the object side of the fifth lens is convex and the image side is concave, and the image side of the sixth lens is concave; in the third lens A third spacer element is provided between the first lens and the fourth lens, and the third spacer element abuts against the image-side surface of the third lens; a fourth spacer element is provided between the fourth lens and the fifth lens, and the fourth spacer element abuts against the image-side surface of the fourth lens; a fifth spacer element is provided between the fifth lens and the sixth lens, and the fifth spacer element abuts against the image-side surface of the fifth lens; an autofocus assembly is also provided between the first lens group and the second lens group; the optical imaging system satisfies: 1.65≤La / (CT1+T12)≤2.99; 2.95≤Lb / EP45≤3.64; where La is the maximum height of the first lens barrel, CT1 is the center thickness of the first lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, Lb is the maximum height of the second lens barrel, and EP45 is the distance from the image-side surface of the fourth spacer element to the object-side surface of the fifth spacer element along the optical axis.

[0059] In summary, under the condition of 1.65≤La / (CT1+T12)≤2.99, the optical imaging system requires the first lens group to achieve a wide angle within a relatively compact space. This means that it needs to be compactly arranged with the autofocus assembly and the second lens group along the optical axis. This will cause an assembly misalignment problem within the second lens group, affecting assembly stability. Therefore, this application optimizes the assembly misalignment problem within the second lens group by constraining 2.95≤Lb / EP45≤3.64 and adjusting the height of the second lens barrel and the distance between the fourth and fifth spacers, thereby improving its structural stability and ultimately enhancing assembly stability.

[0060] like Figure 15 As shown, Figure 15The figure shows the stress distribution in the second lens barrel when the optical imaging system satisfies La / (CT1+T12)=2.45 and Lb / EP45=3.40. The maximum stress in the second lens barrel is only 2.5715MPa. As can be seen from the figure, when the optical imaging system satisfies the constraints of 1.65≤La / (CT1+T12)≤2.99 and 2.95≤Lb / EP45≤3.64 provided in this application, the stress distribution in the second lens barrel is uniform, indicating that the assembly stability of the lens in the second lens barrel is good.

[0061] like Figure 16 As shown, Figure 16 The stress distribution diagram in the second lens barrel is shown when the optical imaging system satisfies La / (CT1+T12)=2.45 and Lb / EP45=3.92. The maximum stress in the second lens barrel is as high as 8.3552MPa. As can be seen from the figure, when the optical imaging system exceeds the upper limit of the above relationship, stress concentration occurs in the third lens and the fourth lens near the autofocus assembly in the second lens barrel, indicating that the assembly stability of the lenses in the second lens barrel is poor.

[0062] like Figure 17 As shown, Figure 17 The stress distribution diagram in the second lens barrel is shown when the optical imaging system satisfies La / (CT1+T12)=2.45 and Lb / EP45=2.51. The stress in the third and fourth lenses near the autofocus assembly in the second lens barrel can reach up to 5.1075 MPa. As can be seen from the figure, when the optical imaging system exceeds the lower limit of the above relationship, stress concentration also occurs inside the second lens barrel, indicating that the assembly stability of the lenses in the second lens barrel is poor.

[0063] According to some embodiments of this application, the optical imaging system satisfies: 2.50 < f34 / (D3s-d3s) < 3.40, where f34 is the combined focal length of the third lens and the fourth lens, D3s is the outer diameter of the object-side surface of the third spacer element, and d3s is the inner diameter of the object-side surface of the third spacer element. Designing the inner and outer diameters of the third spacer element based on the combined focal length of the third and fourth lenses, and reasonably controlling this conditional range, can effectively block stray light from affecting image quality, while minimizing the outer diameter and saving costs.

[0064] According to some embodiments of this application, the optical imaging system satisfies: 4.15 < f12 / (EP01+CP1) < 8.35, where f12 is the combined focal length of the first lens and the second lens, EP01 is the distance along the optical axis from the side of the first lens barrel to the side of the first spacer element, and CP1 is the maximum thickness of the first spacer element along the optical axis. By designing the thickness of the spacer element and the thickness from the top surface to the spacer element based on the combined focal length of the first and second lenses of the optical system, and reasonably controlling this conditional range, the uniformity of the thickness distribution of the lens and element structures can be maintained, improving assembly stability.

[0065] According to some embodiments of this application, the optical imaging system satisfies: -2.81 ≤ (D1s + D1m) / f1 ≤ -2.40, where D1s is the outer diameter of the object-side surface of the first spacer element, D1m is the outer diameter of the image-side surface of the first spacer element, and f1 is the effective focal length of the first lens. By reasonably controlling this conditional range and designing the outer diameter of adjacent spacer elements based on the effective focal length of the first lens, the structural shape can be effectively reduced, costs saved, and market competitiveness enhanced.

[0066] According to some embodiments of this application, the optical imaging system satisfies: 2.65 ≤ f2 / (Dam-dam) ≤ 3.17, where f2 is the effective focal length of the second lens, Dam is the outer diameter of the image-side surface of the first lens barrel, and dam is the inner diameter of the image-side surface of the first lens barrel. Reasonably controlling this conditional range allows for control of the support component length to avoid component deformation due to high temperature and humidity, which could cause variations in lens performance. Simultaneously, it reduces the overall size, thereby reducing the lens barrel's outer diameter and lowering costs.

[0067] According to some embodiments of this application, the optical imaging system satisfies: 2.00 < d3m / CT4 < 3.20, where d3m is the inner diameter of the image-side surface of the third spacer element, and CT4 is the center thickness of the fourth lens on the optical axis. By reasonably controlling this conditional range and designing the image-side inner diameter of adjacent supporting elements based on the center thickness of the fourth lens, space for improving stray light is provided without affecting the light emission of the optical system, thereby improving image quality.

[0068] According to some embodiments of this application, the optical imaging system satisfies: -1.75 < (d4s + d4m) / R8 < -1.40, where d4s is the inner diameter of the object-side surface of the fourth spacer element, d4m is the inner diameter of the image-side surface of the fourth spacer element, and R8 is the radius of curvature of the image-side surface of the fourth lens. By reasonably controlling this conditional range, the convergence and refraction angles of light rays in the fourth lens can be effectively controlled, meeting the system's good manufacturability and required specifications; simultaneously, it can block excess stray light as much as possible, improving image quality.

[0069] According to some embodiments of this application, the optical imaging system satisfies: 15.98 ≤ dbs / CT3 ≤ 19.39, where dbs is the inner diameter of the object side of the second lens barrel, and CT3 is the center thickness of the third lens on the optical axis. By reasonably controlling this conditional range and designing the image side inner diameter of the adjacent supporting lens barrels based on the center thickness of the third lens, space for improving stray light is provided without affecting the light emission of the optical system, thereby improving image quality.

[0070] According to some embodiments of this application, the optical imaging system satisfies: 1.05 < (Dbm - dbm) / (Das - das) < 1.45, where Dbm is the outer diameter of the image-side face of the second lens barrel, dbm is the inner diameter of the image-side face of the second lens barrel, Das is the outer diameter of the object-side face of the first lens barrel, and das is the inner diameter of the object-side face of the first lens barrel. Controlling the ratio of the inner and outer diameters of the lens barrel group, i.e., reasonably controlling the size of the object-side end face of the lens, minimizes the head size to the greatest extent while meeting the assembly and support requirements, resulting in a more compact overall structure that meets market demands.

[0071] According to some embodiments of this application, the optical imaging system satisfies: 3.77 ≤ d1m / CT2 ≤ 4.80, where d1m is the inner diameter of the image-side surface of the first spacer element, and CT2 is the center thickness of the second lens on the optical axis. By reasonably controlling this conditional range and designing the image-side inner diameter of adjacent supporting elements based on the center thickness of the second lens, space for improving stray light is provided without affecting the light emission of the optical system, thereby improving image quality.

[0072] According to some embodiments of this application, the optical imaging system satisfies: 3.41 ≤ d5s / T56 ≤ 6.98, where d5s is the inner diameter of the side surface of the fifth spacer element, and T56 is the air gap between the fifth lens and the sixth lens on the optical axis. By adjusting the inner diameter of the side surface of the fifth spacer element according to the air gap between the fifth and sixth lenses, the length of the fifth spacer element is controlled to avoid excessive deformation after assembly, which could affect lens parameters and yield.

[0073] According to some embodiments of this application, the optical imaging system satisfies: 1.00 < Dbs / TD < 1.30, where Dbs is the outer diameter of the object side of the second lens barrel, and TD is the axial distance along the optical axis from the object side of the first lens to the image side of the sixth lens. By reasonably controlling this conditional range, i.e., by selecting the outer diameter of the object side of the second lens barrel based on the axial distance from the first lens to the sixth lens, the outer diameter of the lens barrel can be reasonably reduced while ensuring a reasonable distribution of the lens components, thus saving costs.

[0074] According to some embodiments of this application, the optical imaging system satisfies: 10.68 ≤ D4s / (EP34+CP4) ≤ 18.77, where D4s is the outer diameter of the object side of the fourth spacer element, EP34 is the distance along the optical axis from the image side of the third spacer element to the object side of the fourth spacer element, and CP4 is the maximum thickness of the fourth spacer element along the optical axis. By reasonably controlling this conditional range, while ensuring the stability of the structural assembly thickness, the outer diameter of the spacer element structure can be reasonably reduced, the lens volume can be reduced, and miniaturization can be achieved.

[0075] According to another aspect of this application, an optical imaging system is provided, which may include a first lens barrel and a second lens barrel arranged sequentially from the object side to the image side along the optical axis; the first lens barrel includes a first lens group, the first lens group including a first lens with negative optical power and a second lens with positive optical power, wherein the object side of the second lens is convex and the image side is concave; a first spacer element is provided between the first lens and the second lens, and the first spacer element abuts against the image side of the first lens; the second lens barrel includes a second lens group, the second lens group including a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power and a sixth lens with negative optical power, wherein the object side of the third lens is convex and the image side is concave, the object side of the fourth lens is convex and the image side is convex, the object side of the fifth lens is convex and the image side is concave, and the image side of the sixth lens is concave; a third spacer element is provided between the third lens and the fourth lens, and the third spacer element abuts against the image side of the first lens. An image-side surface of the third lens is provided; a fourth spacer element is provided between the fourth and fifth lenses, and the fourth spacer element abuts against the image-side surface of the fourth lens; a fifth spacer element is provided between the fifth and sixth lenses, and the fifth spacer element abuts against the image-side surface of the fifth lens; an autofocus assembly is also provided between the first lens group and the second lens group; the optical imaging system satisfies: 1.65≤La / (CT1+T12)≤2.99; 1.35≤(D3m+D4m+D5m) / f3456≤3.21; where La is the maximum height of the first lens barrel, CT1 is the center thickness of the first lens on the optical axis, T12 is the air gap between the first and second lenses on the optical axis, D3m is the outer diameter of the image-side surface of the third spacer element, D4m is the outer diameter of the image-side surface of the fourth spacer element, D5m is the outer diameter of the image-side surface of the fifth spacer element, and f3456 is the combined focal length of the third, fourth, fifth, and sixth lenses.

[0076] In summary, under the premise of 1.65≤La / (CT1+T12)≤2.99, the optical imaging system indicates that the first lens group needs to achieve a wide angle within a relatively compact space. This means that it needs to be compactly arranged with the autofocus assembly and the second lens group in the axial direction. At this time, the size of the spacer element in the second lens barrel will also be large, resulting in a large overall shape of the second lens barrel. Therefore, this application also reasonably constrains 1.35≤(D3m+D4m+D5m) / f3456≤3.21, and designs the outer diameter of each spacer support element according to the combined focal length of the third, fourth, fifth and sixth lenses. This can effectively reduce the structural shape, save costs and provide market competitiveness.

[0077] 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 optical imaging system can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit this. For example, the optical imaging lens may also include a number of spacers other than those described in the above embodiments, as needed.

[0078] Some specific, non-limiting embodiments of the above-described implementations of this application are described in more detail below with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ represents the object plane of the optical imaging system, 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 is the first surface of the autofocus assembly ET, S6 is the second surface of the autofocus assembly ET, S7 is the third surface of the autofocus assembly ET, S8 is the fourth surface of the autofocus assembly ET, S9 represents the object-side surface of the third lens E3, S10 represents the image-side surface of the third lens E3, S11 represents the object-side surface of the fourth lens E4, S12 represents the image-side surface of the fourth lens E4, S13 represents the object-side surface of the fifth lens E5, S14 represents the image-side surface of the fifth lens E5, S15 represents the object-side surface of the sixth lens, S16 represents the image-side surface of the sixth lens E6, S17 represents the object-side surface of the filter E7, S18 represents the image-side surface of the filter E7, and S19 represents the image plane.

[0079] Example 1

[0080] like Figure 3As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0081] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0082] In this embodiment, the first lens E1 has negative optical power, and its object-side surface is convex and its image-side surface is concave; the second lens E2 has positive optical power, and its object-side surface is convex and its image-side surface is concave; the third lens E3 has negative optical power, and its object-side surface is convex and its image-side surface is concave; the fourth lens E4 has positive optical power, and its object-side surface is convex and its image-side surface is convex; the fifth lens E5 has positive optical power, and its object-side surface is convex and its image-side surface is concave; the sixth lens E6 has negative optical power, and its object-side surface is concave and its image-side surface is concave.

[0083] In addition, Table 1 shows the basic optical parameters of the optical imaging system of Embodiment 1, where the units of radius of curvature and thickness / distance are millimeters (mm).

[0084] Table 1

[0085]

[0086] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0087] ;

[0088] Where x is the distance vector from the vertex of the aspherical surface at a height 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 the aspherical mirrors S1 to S4 and S9 to S16 in Example 1.

[0089] Table 2

[0090]

[0091] In addition, Table 3 below shows the values ​​of RT1 and RT2 for the autofocus component ET in Table 1 above at three different object distances D1. The units for D1, RT1, and RT2 in the table are all (mm).

[0092] Table 3

[0093]

[0094] Example 2

[0095] like Figure 4 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0096] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0097] It is worth noting that, compared with Embodiment 1 above, the optical imaging system of Embodiment 2 has the same optical parameters. That is, the basic optical parameter table of the optical imaging system of Embodiment 2 is the same as Table 1, the aspherical coefficient table is the same as Table 2, and the basic optical parameters of the autofocus component ET at different object distances are the same as Table 3. However, the optical imaging system of Embodiment 2 has different structural parameters from the optical imaging system of Embodiment 1 above. That is, the difference between Embodiment 2 and Embodiment 1 is that the dimensional values ​​of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0098] Example 3

[0099] like Figure 5 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0100] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0101] It is worth noting that, compared with Embodiment 1 above, the optical imaging system of Embodiment 3 has the same optical parameters. That is, the basic optical parameter table of the optical imaging system of Embodiment 3 is the same as Table 1, the aspherical coefficient table is the same as Table 2, and the basic optical parameters of the autofocus component ET at different object distances are the same as Table 3. However, the optical imaging system of Embodiment 3 has different structural parameters than the optical imaging system of Embodiment 1 above. That is, the difference between Embodiment 3 and Embodiment 1 above lies in the different dimensional values ​​of some structural parameters of the lens barrel and the spacer element in the optical imaging system.

[0102] In summary, the on-axis chromatic aberration curves of the optical imaging systems in Embodiments 1, 2, and 3 are as follows: Figure 6A As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging system; the astigmatism curves of the optical imaging systems in Embodiments 1, 2, and 3 are shown below. 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 imaging systems in Embodiments 1, 2, and 3 are as follows: Figure 6C As shown, it represents the degree of distortion in the actual image. According to... Figure 6A , Figure 6B and Figure 6C It can be seen that the optical imaging systems in Embodiment 1, Embodiment 2 and Embodiment 3 can all achieve good imaging quality.

[0103] Example 4

[0104] like Figure 7 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0105] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0106] In this embodiment, the first lens E1 has negative optical power, and its object-side surface is convex and its image-side surface is concave; the second lens E2 has positive optical power, and its object-side surface is convex and its image-side surface is concave; the third lens E3 has negative optical power, and its object-side surface is convex and its image-side surface is concave; the fourth lens E4 has positive optical power, and its object-side surface is convex and its image-side surface is convex; the fifth lens E5 has positive optical power, and its object-side surface is convex and its image-side surface is concave; the sixth lens E6 has negative optical power, and its object-side surface is concave and its image-side surface is concave.

[0107] In addition, Table 4 shows the basic optical parameters of the optical imaging system of Embodiment 4, where the units of radius of curvature and thickness / distance are millimeters (mm).

[0108] Table 4

[0109]

[0110] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the aspherical formula of Embodiment 1.

[0111] Table 5 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror S1 to S4 and S9 to S16 in Example 4.

[0112] Table 5

[0113]

[0114] In addition, Table 6 below shows the values ​​of RT1 and RT2 for the autofocus component ET in Table 4 above at three different object distances D1. The units for D1, RT1, and RT2 in the table are all (mm).

[0115] Table 6

[0116]

[0117] Example 5

[0118] like Figure 8 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0119] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0120] It is worth noting that, compared with Embodiment 4 above, the optical imaging system of Embodiment 5 has the same optical parameters. That is, the basic optical parameter table of the optical imaging system of Embodiment 5 is the same as Table 4, the aspherical coefficient table is the same as Table 5, and the basic optical parameters of the autofocus component ET at different object distances are the same as Table 6. However, the optical imaging system of Embodiment 5 has different structural parameters from the optical imaging system of Embodiment 4 above. That is, the difference between Embodiment 5 and Embodiment 4 above lies in the fact that the dimensional values ​​of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0121] Example 6

[0122] like Figure 9 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0123] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0124] It is worth noting that, compared with Embodiment 4 above, the optical imaging system of Embodiment 6 has the same optical parameters. That is, the basic optical parameter table of the optical imaging system of Embodiment 6 is the same as Table 4, the aspherical coefficient table is the same as Table 5, and the basic optical parameters of the autofocus component ET at different object distances are the same as Table 6. However, the optical imaging system of Embodiment 6 has different structural parameters from the optical imaging system of Embodiment 4 above. That is, the difference between Embodiment 6 and Embodiment 4 above lies in the fact that the dimensional values ​​of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0125] In summary, the on-axis chromatic aberration curves of the optical imaging systems in Examples 4, 5, and 6 are as follows: Figure 10A As shown, it represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging system; the astigmatism curves of the optical imaging systems in Examples 4, 5, and 6 are shown below. Figure 10BAs shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. The distortion curves of the optical imaging systems in Examples 4, 5, and 6 are as follows: Figure 10C As shown, it represents the degree of distortion in the actual image. According to... Figure 10A , Figure 10B , Figure 10C It can be seen that the optical imaging systems in Embodiments 4, 5 and 6 can all achieve good imaging quality.

[0126] Example 7

[0127] like Figure 11 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0128] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0129] In this embodiment, the first lens E1 has negative optical power, with its object-side surface being concave and its image-side surface being convex; the second lens E2 has positive optical power, with its object-side surface being convex and its image-side surface being concave; the third lens E3 has negative optical power, with its object-side surface being convex and its image-side surface being concave; the fourth lens E4 has positive optical power, with its object-side surface being convex and its image-side surface being convex; the fifth lens E5 has positive optical power, with its object-side surface being convex and its image-side surface being concave; and the sixth lens E6 has negative optical power, with its object-side surface being convex and its image-side surface being concave.

[0130] In addition, Table 7 shows the basic optical parameters of the optical imaging system of Embodiment 7, where the units of radius of curvature and thickness / distance are millimeters (mm).

[0131] Table 7

[0132]

[0133] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the aspherical formula of Embodiment 1.

[0134] Table 8 below shows the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror S1 to S4 and S9 to S16 in Example 7.

[0135] Table 8

[0136]

[0137] In addition, Table 9 below shows the values ​​of RT1 and RT2 for the autofocus component ET in Table 7 above at three different object distances D1. The units for D1, RT1, and RT2 in the table are all (mm).

[0138] Table 9

[0139]

[0140] Example 8

[0141] like Figure 12 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0142] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0143] It is worth noting that, compared with Embodiment 7 above, the optical imaging system of Embodiment 8 has the same optical parameters. That is, the basic optical parameter table of the optical imaging system of Embodiment 8 is the same as Table 7, the aspherical coefficient table is the same as Table 8, and the basic optical parameters of the autofocus component ET at different object distances are the same as Table 9. However, the optical imaging system of Embodiment 8 has different structural parameters than the optical imaging system of Embodiment 7 above. That is, the difference between Embodiment 8 and Embodiment 7 is that the dimensional values ​​of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0144] Example 9

[0145] like Figure 13 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb arranged sequentially from the object side to the image side along the optical axis. The first lens barrel Pa contains a first lens group, which includes a first lens E1 and a second lens E2. The second lens barrel Pb contains a second lens group, which includes a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus component ET is also provided between the second lens E2 and the third lens E3.

[0146] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and abutting against the image side of the first lens E1. The second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and abutting against the image side of the third lens E3, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5 and abutting against the image side of the fourth lens E4, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and abutting against the image side of the fifth lens E5.

[0147] It is worth noting that, compared with Embodiment 7 above, the optical imaging system of Embodiment 9 has the same optical parameters. That is, the basic optical parameter table of the optical imaging system of Embodiment 9 is the same as Table 7, the aspherical coefficient table is the same as Table 8, and the basic optical parameters of the autofocus component ET at different object distances are the same as Table 9. However, the optical imaging system of Embodiment 9 has different structural parameters than the optical imaging system of Embodiment 7 above. That is, the difference between Embodiment 9 and Embodiment 7 is that the dimensional values ​​of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0148] In summary, the on-axis chromatic aberration curves of the optical imaging systems in Examples 7, 8, and 9 are as follows: Figure 14A As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging system; the astigmatism curves of the optical imaging systems in Examples 7, 8, and 9 are shown below. Figure 14BAs shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. The distortion curves of the optical imaging systems in Embodiments 7, 8, and 9 are as follows: Figure 14C As shown, it represents the degree of distortion in the actual image. According to... Figure 14A , Figure 14B , Figure 14C It can be seen that the optical imaging systems in Embodiments 7, 8 and 9 can all achieve good imaging quality.

[0149] In summary, in Embodiments 1 to 9, the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, the combined focal length f12 of the first lens E1 and the second lens E2, the combined focal length f34 of the third lens E3 and the fourth lens E4, the combined focal length f3456 of the third lens E3 to the sixth lens E6, and the on-axis distance TD from the object side of the first lens E1 to the image side of the sixth lens E6 along the optical axis are shown in Table 10 below.

[0150] Table 10

[0151]

[0152] Furthermore, the structural parameters of the optical imaging systems in Embodiments 1 to 9 are specifically shown in Table 11. The meanings of each parameter are as follows: d1m is the inner diameter of the image-side surface of the first spacer element P1; D1s is the outer diameter of the object-side surface of the first spacer element P1; D1m is the outer diameter of the image-side surface of the first spacer element P1; d3s is the inner diameter of the object-side surface of the third spacer element P3; d3m is the inner diameter of the image-side surface of the third spacer element P3; D3s is the outer diameter of the object-side surface of the third spacer element P3; D3m is the outer diameter of the image-side surface of the third spacer element P3; d4s is the inner diameter of the object-side surface of the fourth spacer element P4; d4m is the inner diameter of the image-side surface of the fourth spacer element P4; D4s is the outer diameter of the object-side surface of the fourth spacer element P4; D4m is the outer diameter of the image-side surface of the fourth spacer element P4; d5s is the inner diameter of the object-side surface of the fifth spacer element P5; D5m is the outer diameter of the image-side surface of the fifth spacer element P5; das is the inner diameter of the object-side surface of the first lens tube Pa. The inner diameters are: dam is the inner diameter of the image side of the first lens barrel Pa; Das is the outer diameter of the object side of the first lens barrel Pa; Dam is the outer diameter of the image side of the first lens barrel Pa; dbs is the inner diameter of the object side of the second lens barrel Pb; dbm is the inner diameter of the image side of the second lens barrel Pb; Dbs is the outer diameter of the object side of the second lens barrel Pb; Dbm is the outer diameter of the image side of the second lens barrel Pb; EP01 is the distance from the object side of the first lens barrel Pa to the object side of the first spacer element P1 along the optical axis; CP1 is the maximum thickness of the first spacer element P1 along the optical axis; EP34 is the distance from the image side of the third spacer element P3 to the object side of the fourth spacer element P4 along the optical axis; CP4 is the maximum thickness of the fourth spacer element P4 along the optical axis; EP45 is the distance from the image side of the fourth spacer element P4 to the object side of the fifth spacer element P5 along the optical axis; La is the maximum height of the first lens barrel Pa; and Lb is the maximum height of the second lens barrel Pb.

[0153] Table 11

[0154]

[0155] In summary, the optical imaging systems in Examples 1 to 9 satisfy the relationships shown in Table 12, as detailed in Table 12.

[0156] Table 12

[0157]

[0158] It is worth mentioning that, according to one aspect of this application, one embodiment of this application further provides a camera module, which may include the aforementioned optical imaging system and a photosensitive element, the photosensitive element being disposed on the image side of the optical imaging system for imaging. It is understood that the photosensitive element mentioned in this application may, but is not limited to, be implemented as a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device, and this application will not elaborate further on this.

[0159] Furthermore, according to another aspect of this application, one embodiment of this application provides an electronic device that may include a camera module and a processor as described above. The camera module is communicatively connected to the processor for acquiring image data and inputting the image data into the processor for processing. It is understood that the electronic device mentioned in this application may, but is not limited to, a device such as a mobile phone equipped with the camera module, and this application will not elaborate further on this.

[0160] 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.

[0161] 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. An optical imaging system, characterized in that, It includes a first lens tube and a second lens tube arranged sequentially from the object side to the image side along the optical axis; The first lens barrel contains a first lens group, which contains two lenses with optical power. The first lens group includes a first lens with negative optical power and a second lens with positive optical power, wherein the object side of the second lens is convex and the image side is concave. A first spacer element is provided between the first lens and the second lens, and the first spacer element abuts against the image side of the first lens; The second lens barrel contains a second lens group, which contains four lenses with optical power. The second lens group includes a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power. The object-side surface of the third lens is convex and the image-side surface is concave. The object-side surface of the fourth lens is convex and the image-side surface is convex. The object-side surface of the fifth lens is convex and the image-side surface is concave. The image-side surface of the sixth lens is concave. A third spacer element is provided between the third lens and the fourth lens, and the third spacer element abuts against the image side of the third lens; A fourth spacer element is provided between the fourth lens and the fifth lens, and the fourth spacer element abuts against the image side of the fourth lens; A fifth spacer element is provided between the fifth lens and the sixth lens, and the fifth spacer element abuts against the image side of the fifth lens; An autofocus assembly is also provided between the first lens group and the second lens group; The optical imaging system satisfies the following conditions: 1.65≤La / (CT1+T12)≤2.99; 2.95≤Lb / EP45≤3.64; 4.15<f12 / (EP01+CP1)<8.35; where La is the maximum height of the first lens barrel, CT1 is the center thickness of the first lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, Lb is the maximum height of the second lens barrel, EP45 is the distance from the image side of the fourth spacer element to the object side of the fifth spacer element along the optical axis, f12 is the combined focal length of the first lens and the second lens, EP01 is the distance from the object side of the first lens barrel to the object side of the first spacer element along the optical axis, and CP1 is the maximum thickness of the first spacer element along the optical axis.

2. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 2.50 < f34 / (D3s-d3s) < 3.40, where f34 is the combined focal length of the third lens and the fourth lens, D3s is the outer diameter of the side surface of the third spacer element, and d3s is the inner diameter of the side surface of the third spacer element.

3. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: -2.81≤(D1s+D1m) / f1≤-2.40, where D1s is the outer diameter of the object side of the first spacer element, D1m is the outer diameter of the image side of the first spacer element, and f1 is the effective focal length of the first lens.

4. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 2.65≤f2 / (Dam-dam)≤3.17, where f2 is the effective focal length of the second lens, Dam is the outer diameter of the image side of the first lens barrel, and dam is the inner diameter of the image side of the first lens barrel.

5. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 2.00 < d3m / CT4 < 3.20, where d3m is the inner diameter of the image side of the third spacer element, and CT4 is the center thickness of the fourth lens on the optical axis.

6. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 1.35≤(D3m+D4m+D5m) / f3456≤3.21, where D3m is the outer diameter of the image-side surface of the third spacer element, D4m is the outer diameter of the image-side surface of the fourth spacer element, D5m is the outer diameter of the image-side surface of the fifth spacer element, and f3456 is the combined focal length of the third lens, the fourth lens, the fifth lens, and the sixth lens.

7. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: -1.75 < (d4s + d4m) / R8 < -1.40, where d4s is the inner diameter of the object side of the fourth spacer element, d4m is the inner diameter of the image side of the fourth spacer element, and R8 is the radius of curvature of the image side of the fourth lens.

8. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 15.98≤dbs / CT3≤19.39, where dbs is the inner diameter of the side of the second lens barrel and CT3 is the center thickness of the third lens on the optical axis.

9. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 1.05 < (Dbm - dbm) / (Das - das) < 1.45, where Dbm is the outer diameter of the image side of the second lens tube, dbm is the inner diameter of the image side of the second lens tube, Das is the outer diameter of the object side of the first lens tube, and das is the inner diameter of the object side of the first lens tube.

10. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 3.77≤d1m / CT2≤4.80, where d1m is the inner diameter of the image side of the first spacer element and CT2 is the center thickness of the second lens on the optical axis.

11. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 3.41≤d5s / T56≤6.98, where d5s is the inner diameter of the side of the fifth spacer element, and T56 is the air gap between the fifth lens and the sixth lens on the optical axis.

12. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 1.00 < Dbs / TD < 1.30, where Dbs is the outer diameter of the object side of the second lens barrel, and TD is the axial distance from the object side of the first lens to the image side of the sixth lens along the optical axis.

13. The optical imaging system according to claim 1, characterized in that, The optical imaging system satisfies: 10.68≤D4s / (EP34+CP4)≤18.77, where D4s is the outer diameter of the object side of the fourth spacer element, EP34 is the distance from the image side of the third spacer element to the object side of the fourth spacer element along the optical axis, and CP4 is the maximum thickness of the fourth spacer element along the optical axis.

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