Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which comprises: a lens barrel, a lens group and a spacer element group disposed in the lens barrel, wherein the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in order from the object side to the image side along the optical axis; the spacer element group comprises: a first spacer element disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens. The first lens has a negative optical focal length, and the optical imaging lens satisfies: ‑0.15≤(R1‑R2) / (R1+R2)≤0.65 and 0.15<(DT11‑Yc11) / (d1s / 2)<0.65; wherein R1 is the radius of curvature of the object side surface of the first lens, R2 is the radius of curvature of the image side surface of the first lens, DT11 is the maximum effective radius of the object side surface of the first lens, Yc11 is the distance from the inflection point farthest from the optical axis in the effective diameter of the object side surface of the first lens to the optical axis, and d1s is the maximum inner diameter of the object side surface of the first spacer element in a direction perpendicular to the optical axis.

Description

Technical Field

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

[0002] With the innovation of technology, the update and iteration of consumer electronic devices such as mobile phones and tablets are accelerating, and the market requirements for product-side optical lenses are getting higher and higher. Imaging lenses are required to have high pixels, large image surfaces, and wide viewing angles, and to have smaller mechanical sizes to meet the needs of electronic design and to obtain a larger screen-to-body ratio.

[0003] In the current six-element optical imaging lens, the important indicators of wide viewing angle, large image area and ultra-thinness often restrict each other. For example, the superposition of the two indicators of wide viewing angle and ultra-thinness will increase the risk of stray light and MTF (modulation transfer function) performance. Therefore, how to design a lens that can achieve a wide viewing angle and meet the ultra-thin indicators, while minimizing the risk of edge field performance, is one of the contradictions that technicians in this field need to solve. Summary of the invention

[0004] In a first aspect, the present application provides an optical imaging lens, which includes: a lens barrel, and a lens group and a spacer element group disposed in the lens barrel, wherein the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in order from the object side to the image side along the optical axis. The number of lenses with optical power in the optical imaging lens is six. The spacer element group includes: a first spacer element disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens. The first lens has negative optical power, and the optical imaging lens satisfies: -0.15≤(R1-R2) / (R1+R2)≤0.65 and 0.15<(DT11-Yc11) / (d1s / 2)<0.65; wherein R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, DT11 is the maximum effective radius of the object side surface of the first lens, Yc11 is the distance from the inflection point farthest from the optical axis in the effective diameter of the object side surface of the first lens to the optical axis, and d1s is the maximum inner diameter of the object side surface of the first spacer element in a direction perpendicular to the optical axis.

[0005] In one embodiment, the spacer element group includes: a third spacer element, wherein the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the optical imaging lens satisfies: -1.10 < d3s / R6 - d3m / R7 < -0.65, where d3s is the maximum inner diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, d3m is the maximum inner diameter of the image side surface of the third spacer element in the direction perpendicular to the optical axis, R6 is the radius of curvature of the image side surface of the third lens, and R7 is the radius of curvature of the object side surface of the fourth lens.

[0006] In one embodiment, the optical imaging lens satisfies: 2.00 < EP01 / CT1 < 3.55, where EP01 is the distance from the object side end surface of the lens barrel to the object side surface of the first spacer element along the optical axis, and CT1 is the central thickness of the first lens on the optical axis.

[0007] In one embodiment, the spacer element group includes: a fifth spacer element, wherein the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the optical imaging lens satisfies: -1.70 < (d0m - d5m) / f5 < 1.45, where d0m is the maximum inner diameter of the image side end surface of the lens barrel in the direction perpendicular to the optical axis, d5m is the maximum inner diameter of the image side surface of the fifth spacer element in the direction perpendicular to the optical axis, and f5 is the effective focal length of the fifth lens.

[0008] In one embodiment, the optical imaging lens satisfies: 0.20 < (DT11 - DT12) / (d1s / 2) < 0.45, where DT11 is the maximum effective radius of the object side surface of the first lens, DT12 is the maximum effective radius of the image side surface of the first lens, and d1s is the maximum inner diameter of the object side surface of the first spacer element in the direction perpendicular to the optical axis.

[0009] In one embodiment, the spacer element group further includes: a second spacer element and a third spacer element, wherein the second spacer element is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens, and the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the optical imaging lens satisfies: 4.35 < (D3s - d3s) / EP23 < 5.95, where D3s is the maximum outer diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, d3s is the maximum inner diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, and EP23 is the distance between the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis.

[0010] In one embodiment, the spacer element group further includes: a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 4.50 < f45 / EP45 < 7.50, where f45 is the combined focal length of the fourth lens and the fifth lens, and EP45 is the distance along the optical axis between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element.

[0011] In one embodiment, the spacer element group further includes: a fourth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; the optical imaging lens satisfies: -0.65 < d4s / R8 < 1.15, where d4s is the maximum inner diameter of the object side surface of the fourth spacer element in a direction perpendicular to the optical axis, and R8 is the curvature radius of the image side surface of the fourth lens.

[0012] In one embodiment, the spacer element group includes: a third spacer element, wherein the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the optical imaging lens satisfies: 0.50 < d3s / R5 < 0.90, where d3s is the maximum inner diameter of the object side surface of the third spacer element in a direction perpendicular to the optical axis, and R5 is the curvature radius of the object side surface of the third lens.

[0013] In one embodiment, the spacer element group further includes: a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 1.15 < (D4m - d4m) / (D5m - d5m) < 1.40, where D4m is the maximum outer diameter of the image side surface of the fourth spacer element in a direction perpendicular to the optical axis, d4m is the maximum inner diameter of the image side surface of the fourth spacer element in a direction perpendicular to the optical axis, D5m is the maximum outer diameter of the image side surface of the fifth spacer element in a direction perpendicular to the optical axis, and d5m is the maximum inner diameter of the image side surface of the fifth spacer element in a direction perpendicular to the optical axis.

[0014] In one embodiment, the spacer element group further includes: a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 0.25 ≤ |SAG52| / EP45 < 1.50, where |SAG52| is the absolute value of the axial distance between the intersection point of the image side surface of the fifth lens and the optical axis and the vertex of the effective radius of the image side surface of the fifth lens, and EP45 is the distance between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis.

[0015] In one embodiment, the spacer element group further includes: a third spacer element and a fourth spacer element, wherein the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens, and the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; the optical imaging lens satisfies: 1.20 < (T34 + CT4 + T45) / EP34 < 1.65, where T34 is the air gap between the third lens and the fourth lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, and EP34 is the distance between the image side surface of the third spacer element and the object side surface of the fourth spacer element along the optical axis.

[0016] In one embodiment, the spacer element group includes: a fifth spacer element, wherein the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 0.25 < Yc62 / d5m < 0.55, where d5m is the maximum inner diameter of the image side surface of the fifth spacer element in the direction perpendicular to the optical axis, and Yc62 is the distance from the inflection point farthest from the optical axis among the effective diameters of the image side surface of the sixth lens to the optical axis.

[0017] In one embodiment, the optical imaging lens further includes an autofocus assembly disposed between the second lens and the third lens.

[0018] The second aspect of the present application provides an optical imaging lens, which includes: a lens barrel, and a lens group and a spacer element group disposed in the lens barrel, wherein the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in order from the object side to the image side along the optical axis. The number of lenses with optical power in the optical imaging lens is six. The spacer element group includes: a first spacer element disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens. The first lens has negative focal power, and the optical imaging lens satisfies: -0.15≤(R1-R2) / (R1+R2)≤0.65 and 0.20<(DT11-DT12) / (d1s / 2)<0.45; wherein R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, DT11 is the maximum effective radius of the object side surface of the first lens, DT12 is the maximum effective radius of the image side surface of the first lens, and d1s is the maximum inner diameter of the object side surface of the first spacer element in a direction perpendicular to the optical axis.

[0019] The present application provides a six-piece optical imaging lens, wherein the first lens has a negative optical focal length, and the optical imaging lens satisfies -0.15≤(R1-R2) / (R1+R2)≤0.65. By controlling the curvature radius of the object side and the image side of the first lens within a certain range, the off-axis aberration of the system can be effectively corrected, while ensuring that the lens achieves good wide-angle characteristics. However, while ensuring the wide-angle characteristics, the off-axis light performance will also be affected by the effective diameter and the inflection point position. Since the first lens has a negative optical focal length, the effective radius of the object side is often designed to be relatively large, and thus the effective radius and the inflection point position have a greater impact on the MTF performance. The present application designs a first spacer element on the image side of the first lens, and makes the optical imaging lens satisfy 0.15<(DT11-Yc11) / (d1s / 2)<0.65, thereby controlling the inner diameter of the object side of the first spacer element, and can intercept non-imaging light as much as possible. At the same time, by controlling the effective radius and inflection point position of the object side of the first lens, the influence of the effective radius and inflection point position of the object side of the first lens on off-axis light can be reduced, thereby ensuring the MTF performance of the lens and improving imaging stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 A schematic diagram showing a structural arrangement diagram of an optical imaging lens according to the present application and some parameters;

[0022] Figure 2 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0023] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0024] Figure 4 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0025] Figure 5 The axial chromatic aberration curve (A1), astigmatism curve (B1), distortion curve (C1) and magnification chromatic aberration curve (D1) of the optical imaging lenses of Examples 1 to 3 of the present application are shown;

[0026] Figure 6 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0027] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0028] Figure 8 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0029] Fig. 9 The axial chromatic aberration curve (A2), astigmatism curve (B2), distortion curve (C2) and magnification chromatic aberration curve (D2) of the optical imaging lenses of Examples 4 to 6 of the present application are shown;

[0030] Fig.10 A schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application is shown;

[0031] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application is shown;

[0032] Fig.12 A schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application is shown;

[0033] Fig.13 The axial chromatic aberration curve (A3), astigmatism curve (B3), distortion curve (C3) and magnification chromatic aberration curve (D3) of the optical imaging lenses of Examples 7 to 9 of the present application are shown;

[0034] Fig.14 The defocus curve diagram when the optical imaging lens satisfies (DT11-Yc11) / (d1s / 2)=0.3 is shown;

[0035] Fig.15 The defocus curve diagram when the optical imaging lens satisfies (DT11-Yc11) / (d1s / 2)=0.1 is shown;

[0036] Fig.16 The figure shows a defocus curve diagram when the optical imaging lens satisfies (DT11-Yc11) / (d1s / 2)=0.8. DETAILED DESCRIPTION

[0037] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0039] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0040] Those skilled in the art should understand that a lens is an optical component formed by two refractive surfaces surrounding a transparent medium. The refractive surface can be a spherical surface (including a plane, i.e. a spherical surface with an infinite radius of curvature) or an aspherical surface. The line connecting the centers of curvature of the two refractive surfaces is the optical axis of the lens. In this article, the surface of the two refractive surfaces close to the object is called the object side of the lens, and the surface close to the imaging surface is called the image side of the lens.

[0041] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface shape in the paraxial area can be judged according to the general method in this field, for example, judging the convexity and concavity by the positive or negative R value (R refers to the radius of curvature of the paraxial area). For the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0042] The solutions described in the embodiments of the present application can be simulated by software / tools such as ZEMAX and CODE V. The solutions described in some embodiments can be simulated by CODE V. In the process of simulation using the above software / tools, the surface shape of the lens can be appropriately adjusted according to the surface shape model provided by the software / tool ​​used.

[0043] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0044] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. For example, the lens groups, lens barrels, and spacer elements in the embodiments of the present application can be combined arbitrarily, and are not limited to the lens groups in one embodiment being only combined with the lens barrels, spacer elements, etc. of the embodiment.

[0046] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0047] For a six-element wide-angle lens, several important indicators such as wide viewing angle, large image surface and ultra-thinness often restrict each other. For example, the superposition of the two indicators of wide viewing angle and ultra-thinness will increase the risk of stray light and MTF performance. Usually, the first lens of a six-element wide-angle lens has a negative optical focal length, which helps to realize the design of a wide-angle optical system. By controlling the curvature radius of the object side and image side of the first lens within a certain range, it has a positive effect on correcting the off-axis aberration of the system. However, while ensuring the wide-angle characteristics, the off-axis light performance will also be affected by the effective diameter and the position of the inflection point. Specifically, since the first lens has a negative optical focal length, the effective radius of its object side is often designed to be relatively large, so the effective radius and the inflection point position have a greater impact on the MTF performance. When the inflection point is too close to the optical axis, the field curvature offset of the outer field of view will become serious. When the inflection point is too close to the maximum effective radius of the first lens, the outer field of view performance tends to drop seriously, resulting in blurred edge images.

[0048] The first aspect of the present application provides such an optical imaging lens, which may include a lens group, a spacer element group and a lens barrel, wherein the lens group and the spacer element group are arranged in the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis. The first lens has a negative optical focal length, and the optical imaging lens satisfies: -0.15≤(R1-R2) / (R1+R2)≤0.65. The optical imaging lens according to the present application effectively corrects the off-axis aberration of the system by controlling the curvature radius of the object side and the image side of the first lens within a certain range, while ensuring that the lens achieves good wide-angle characteristics.

[0049] In one embodiment, the spacer element group may include a first spacer element, which is placed on the image side of the first lens and at least partially in contact with the image side surface of the first lens. The optical imaging lens may satisfy: 0.15<(DT11-Yc11) / (d1s / 2)<0.65, wherein Yc11 is the distance from the inflection point farthest from the optical axis in the effective diameter of the object side surface of the first lens to the optical axis, and d1s is the maximum inner diameter of the object side surface of the first spacer element in a direction perpendicular to the optical axis. By controlling the inner diameter of the object side surface of the first spacer element, non-imaging light can be intercepted as much as possible. At the same time, by controlling the effective radius and inflection point position of the object side surface of the first lens, the influence of the effective radius and inflection point position of the object side surface of the first lens on off-axis light can be reduced, thereby ensuring the MTF performance of the lens and improving imaging stability.

[0050] The following combination Figures 14 to 16, further illustrating that the optical imaging lens of the present application has good imaging stability when -0.15≤(R1-R2) / (R1+R2)≤0.65 and 0.15<(DT11-Yc11) / (d1s / 2)<0.65, and can ensure the stability of the MTF peak. Exemplarily, when the first lens of the optical imaging lens has a negative optical power and satisfies -0.15≤(R1-R2) / (R1+R2)≤0.65, Fig.14 The defocus curve diagram when the optical imaging lens satisfies (DT11-Yc11) / (d1s / 2)=0.3 is shown. Fig.15 The defocus curve diagram when the optical imaging lens satisfies (DT11-Yc11) / (d1s / 2)=0.1 is shown. Fig.16 The figure shows a defocus curve diagram when the optical imaging lens satisfies (DT11-Yc11) / (d1s / 2)=0.8.

[0051] Depend on Figures 14 to 16 By comparison, Fig.14 The optical imaging lens meets the range of 0.15<(DT11-Yc11) / (d1s / 2)<0.65 of the present application, that is, the effective radius of the first lens and the distance from the inflection point of the effective radius to the optical axis are controlled within a reasonable range, the peak position of the defocus curve is relatively concentrated, the focus convergence is better, and good imaging quality can be obtained in each field of view. Fig.15 Optical imaging lenses and Fig.16 The optical imaging lens does not meet the range of 0.15<(DT11-Yc11) / (d1s / 2)<0.65 of the present application, the position of the peak of the defocus curve is relatively scattered, and the focus shift is relatively serious. Specifically, Fig.15 The inflection point of the optical imaging lens is too close to the effective radius of the first lens, which will intercept the light in the field of view outside 0.8F, resulting in poor performance of the corresponding field of view. Fig.16 The inflection point of the optical imaging lens is too close to the optical axis, which makes it impossible to intercept light outside the 0.6F field of view, resulting in a serious shift in the field curvature of the outer field of view, and the MTF performance cannot be guaranteed.

[0052] In one embodiment, the spacer element group may include a first spacer element, which is placed on the image side of the first lens and at least partially in contact with the image side surface of the first lens. The optical imaging lens can meet the following conditions: 0.20<(DT11-DT12) / (d1s / 2)<0.45; wherein DT11 is the maximum effective radius of the object side surface of the first lens, DT12 is the maximum effective radius of the image side surface of the first lens, and d1s is the maximum inner diameter of the object side surface of the first spacer element in a direction perpendicular to the optical axis. Satisfying 0.20<(DT11-DT12) / (d1s / 2)<0.45, by controlling the effective radius of the object side surface and the image side surface of the first lens, the molding difficulty of the first lens is reduced, and sufficient design space for the supporting structure is ensured, which is conducive to reducing the difficulty of assembly, and is also conducive to reducing the influence of the effective radius of the object side surface of the first lens on the off-axis light, ensuring the MTF performance of the lens and improving the imaging stability. At the same time, by controlling the inner diameter of the object side surface of the first spacer element, non-imaging light can be intercepted as much as possible.

[0053] In an exemplary embodiment, the optical imaging lens may further include an aperture. The aperture may be disposed between the second lens and the third lens. It should be noted that the position of the aperture disclosed herein is merely an example and not a limitation; in alternative embodiments, the aperture may also be disposed at other positions according to actual needs.

[0054] In an exemplary embodiment, the spacer element group may include one or more of a first spacer element, a second spacer element, a third spacer element, a fourth spacer element, a fifth spacer element, and a sixth spacer element. Among them, the first spacer element is placed on the image side of the first lens and at least partially contacts the image side surface of the first lens. The second spacer element is placed on the image side of the second lens and at least partially contacts the image side surface of the second lens. The third spacer element is placed on the image side of the third lens and at least partially contacts the image side surface of the third lens. The fourth spacer element is placed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens. The fifth spacer element is placed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens. The sixth spacer element is placed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. It should be understood that the present application does not specifically limit the number of spacer elements, and any number of spacer elements may be included between any two lenses, and the entire optical imaging lens may also include any number of spacer elements. Reasonable use of spacer elements can effectively avoid stray light risks, reduce interference with image quality, and thereby improve the imaging quality of the optical imaging lens.

[0055] In an exemplary embodiment, the lens barrel may include an object-side end face, an image-side end face, an outer annular surface, and an inner annular surface, wherein the end face of the lens barrel closest to the object side is the object-side end face of the lens barrel, and the end face of the lens barrel closest to the image side is the image-side end face of the lens barrel; in a direction perpendicular to the optical axis, the surface of the lens barrel farthest from the optical axis is the outer annular surface, and the surface of the lens barrel closest to the optical axis is the inner annular surface.

[0056] In an exemplary embodiment, the lens barrel may be an integrated lens barrel or a split lens barrel.

[0057] In an exemplary embodiment, the optical imaging lens may further include an autofocus component, which is exemplarily disposed between the second lens and the third lens. The autofocus component has the advantages of low power consumption, fast focusing, and miniaturization, and can eliminate temperature drift to ensure lens performance. It should be noted that the position of the autofocus component disclosed herein is only an example and not a limitation; in alternative embodiments, the autofocus component may also be disposed at other positions according to actual needs.

[0058] In an exemplary embodiment, the first lens may have negative optical power, the second lens may have positive optical power or negative optical power, the third lens may have positive optical power, the fourth lens may have positive optical power or negative optical power, the fifth lens may have positive optical power or negative optical power, and the sixth lens may have positive optical power or negative optical power.

[0059] In an exemplary embodiment, at least one trimmed lens may be included in the lens group. The outer peripheral surface of the trimmed lens may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the lens is smaller than the outer diameter of the non-trimmed portion of the lens. When the outer peripheral surface of the lens has a trimmed portion, the outer diameter of the lens generally refers to the outer diameter of the non-trimmed portion of the lens.

[0060] In an exemplary embodiment, at least one trimmed spacer element may be included in the spacer element group. The outer circumference of the trimmed spacer element may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the spacer element is smaller than the outer diameter of the non-trimmed portion of the spacer element. The outer diameter of the spacer element generally refers to the maximum outer diameter of the non-trimmed portion.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1.10 < d3s / R6 - d3m / R7 < -0.65, where d3s is the maximum inner diameter of the object side surface of the third spacer element in a direction perpendicular to the optical axis, d3m is the maximum inner diameter of the image side surface of the third spacer element in a direction perpendicular to the optical axis, R6 is the radius of curvature of the image side surface of the third lens, and R7 is the radius of curvature of the object side surface of the fourth lens. Satisfying -1.10 < d3s / R6 - d3m / R7 < -0.65 can effectively control the radii of curvature of the image side surface of the third lens and the object side surface of the fourth lens within a reasonable range, ensure that the light rays in the marginal field of view have a reasonable field angle, and cooperate with controlling the inner diameters of the object side surface and the image side surface of the third spacer element to correct off-axis aberration and improve the imaging quality of the system.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.00 < EP01 / CT1 < 3.55, where EP01 is the distance from the object side end face of the lens barrel to the object side surface of the first spacer element along the optical axis, and CT1 is the central thickness of the first lens on the optical axis. Satisfying 2.00 < EP01 / CT1 < 3.55 can effectively control the thickness ratio of the first lens within a reasonable range, ensure the molding stability of the first lens, and effectively avoid the assembly deformation amount of the first lens during the assembly process.

[0063] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1.70 < (d0m - d5m) / f5 < 1.45, where d0m is the maximum inner diameter of the image side end face of the lens barrel in a direction perpendicular to the optical axis, d5m is the maximum inner diameter of the image side surface of the fifth spacer element in a direction perpendicular to the optical axis, and f5 is the effective focal length of the fifth lens. Satisfying -1.70 < (d0m - d5m) / f5 < 1.45, controlling the inner diameter of the image side end face of the lens barrel and the outer diameter of the image side surface of the fifth spacer element can ensure the arrangement stability of the lens structure, ensure the connection of the front and rear imaging systems, and improve the assembly stability. Controlling the effective focal length of the fifth lens can ensure that the imaging system better images to the image plane and improve the imaging quality of the lens.

[0064] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 4.35 < (D3s - d3s) / EP23 < 5.95, where D3s is the maximum outer diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, d3s is the maximum inner diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, and EP23 is the distance between the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis. By satisfying 4.35 < (D3s - d3s) / EP23 < 5.95, the inner diameter and outer diameter of the object side surface of the third spacer element can be controlled to intercept non-imaging light as much as possible. At the same time, the contact area between the third lens and the third spacer element can be reasonably controlled to prevent the problem of poor assembly stability caused by excessive step difference between the lens and the contact member during the assembly process.

[0065] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 4.50 < f45 / EP45 < 7.50, where f45 is the combined focal length of the fourth lens and the fifth lens, and EP45 is the distance between the image side surface of the fourth spacer element and the object side surface of the fifth lens along the optical axis. By satisfying 4.50 < f45 / EP45 < 7.50, controlling the distance between the fourth spacer element and the fifth spacer element is beneficial to controlling the edge thickness of the fifth lens, facilitating the layout design of the lens flange mechanism, minimizing the assembly difficulty and risk. At the same time, restricting the combined focal length of the fourth lens and the fifth lens helps the light to be received by the fourth lens and the fifth lens, resulting in higher imaging quality and reducing imaging distortion.

[0066] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: -0.65 < d4s / R8 < 1.15, where d4s is the maximum inner diameter of the object side surface of the fourth spacer element in the direction perpendicular to the optical axis, and R8 is the curvature radius of the image side surface of the fourth lens. By satisfying -0.65 < d4s / R8 < 1.15, the curvature radius of the object side surface of the fourth lens can be effectively controlled within a reasonable range. At the same time, the light in the edge field of view can have a reasonable field angle. By cooperating with controlling the inner diameter of the object side surface of the fourth spacer element, off-axis aberration can be corrected and the imaging quality of the system can be improved.

[0067] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.50 < d3s / R5 < 0.90, where d3s is the maximum inner diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, and R5 is the curvature radius of the object side surface of the third lens. By satisfying 0.50 < d3s / R5 < 0.90, the curvature radius of the object side surface of the third lens can be effectively controlled within a reasonable range. At the same time, the light in the edge field of view can have a reasonable field angle. By cooperating with controlling the inner diameter of the object side surface of the third spacer element, off-axis aberration can be corrected and the imaging quality of the system can be improved.

[0068] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.15<(D4m-d4m) / (D5m-d5m)<1.40, wherein D4m is the maximum outer diameter of the image side surface of the fourth spacer element in a direction perpendicular to the optical axis, d4m is the maximum inner diameter of the image side surface of the fourth spacer element in a direction perpendicular to the optical axis, D5m is the maximum outer diameter of the image side surface of the fifth spacer element in a direction perpendicular to the optical axis, and d5m is the maximum inner diameter of the image side surface of the fifth spacer element in a direction perpendicular to the optical axis. Satisfying 1.15<(D4m-d4m) / (D5m-d5m)<1.40 ensures the uniformity of the transition of the lens barrel structure by controlling the inner and outer diameters of the image side surfaces of the fourth and fifth spacer elements, thereby reducing the difficulty of lens barrel molding; this helps ensure that the supporting structure has sufficient design space, thereby reducing the difficulty of assembly.

[0069] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.25≤|SAG52| / EP45<1.50, wherein |SAG52| is the absolute value of the on-axis distance between the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens, and EP45 is the distance between the image side surface of the fourth spacing element and the object side surface of the fifth spacing element along the optical axis. Satisfying 0.25≤|SAG52| / EP45<1.50 and reasonably designing the height loss of the image side surface of the fifth lens can effectively improve the vertical axis chromatic aberration, spherical aberration, astigmatism, field curvature, etc. of the system, and improve the overall imaging quality of the off-axis field of view. At the same time, controlling the spacing distance between the fourth spacing element and the fifth spacing element is conducive to controlling the edge thickness of the fifth lens, and is conducive to the arrangement design of the lens flange mechanism, so as to minimize the difficulty and risk of assembly.

[0070] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.20<(T34+CT4+T45) / EP34<1.65, wherein T34 is the air spacing between the third lens and the fourth lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, T45 is the air spacing between the fourth lens and the fifth lens on the optical axis, and EP34 is the distance between the image side surface of the third spacing element and the object side surface of the fourth spacing element along the optical axis. Satisfying 1.20<(T34+CT4+T45) / EP34<1.65 can effectively control the gaps between the third lens and the fourth lens, and between the fourth lens and the fifth lens within a reasonable range, ensuring the assembly stability of the lens under external conditions such as high humidity, high temperature, and falling, and controlling CT4 and EP34 at the same time helps to ensure the stability of the middle thickness and edge thickness of the fourth lens, so as to ensure that the imaging effect of the lens is less affected by external interference.

[0071] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.25 < Yc62 / d5m < 0.55, where d5m is the maximum inner diameter of the image side surface of the fifth spacer element in the direction perpendicular to the optical axis, and Yc62 is the distance from the inflection point farthest from the optical axis in the effective diameter of the image side surface of the sixth lens to the optical axis. Satisfying 0.25 < Yc62 / d5m < 0.55 controls the inner diameter of the image side surface of the fifth spacer element, ensures effective interception of unnecessary light while controlling the volume and weight of the spacer element, reduces the difficulty of mold processing and forming, and ensures imaging quality; and controlling the inflection point position of the effective diameter of the image side surface of the sixth lens can reduce the influence of the inflection point position of the effective diameter of the image side surface of the sixth lens on off-axis light, ensure the MTF performance of the lens, and improve imaging stability.

[0072] In an embodiment of the present application, at least one of the lens surfaces of each lens is an aspherical lens surface, that is, at least one of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical lens surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much aberration as possible during imaging, thereby improving imaging quality. Optionally, the object side surface and the image side surface of all the lenses from the first lens to the sixth lens are aspherical lens surfaces.

[0073] In an exemplary embodiment, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0074] In an exemplary embodiment, the image side surface of the second lens may be convex.

[0075] In an exemplary embodiment, the object side surface of the third lens may be convex.

[0076] In an exemplary embodiment, the object side surface of the fourth lens may be convex.

[0077] In an exemplary embodiment, the object side surface of the fifth lens may be concave.

[0078] In an exemplary embodiment, the image side surface of the sixth lens may be concave.

[0079] It should be understood that the present application is concerned with the performance optimization of the six-piece wide-angle lens. Specifically, the present application is concerned with how to overcome the problem that, for example, the effective radius of the object side of the first lens is often designed to be relatively large due to the negative optical power, and thus the effective radius and the position of the inflection point have a greater impact on the MTF performance, or the problem of poor assembly stability due to the excessive step difference between the lens and the supporting member. The specific optical power distribution of the six lenses and the surface configuration of each lens are not the focus of the present application, and these configurations can be adjusted accordingly as needed. That is to say, although several specific optical power distributions and surface configurations are shown for the imaging lens group in the embodiments of the present application, it should be understood that these embodiments are only exemplary, and the imaging lens group in the present application should not be limited to the several specific situations shown in the embodiments.

[0080] The optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the six lenses mentioned above. However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens may be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0081] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0082] Example 1

[0083] Figure 2 FIG. 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application. Figure 2 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The sixth lens E6 has an object side surface S11 and an image side surface S12.

[0084] The optical imaging lens further includes an autofocus assembly T disposed between the second lens E2 and the third lens E3. The optical imaging lens further includes an aperture STO (not shown) disposed between the second lens E2 and the third lens E3. More specifically, the aperture STO is disposed between the autofocus assembly T and the third lens E3.

[0085] Light from an object passes through the surfaces S1 to S12 in sequence and is finally imaged on an imaging surface (not shown).

[0086] Table 1 shows the basic parameters of the lens group of the optical imaging lens of Example 1, wherein the units of the curvature radius, thickness / distance and effective focal length are all millimeters (mm).

[0087] Table 1

[0088]

[0089] In Example 1, the object-side surface and the image-side surface of the first lens E1 to the sixth lens E6 are all aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0090] (1)

[0091] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is 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 curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical mirror surface S1-S12 in Example 1.

[0092] Table 2

[0093]

[0094] like Figure 2 As shown, the optical imaging lens further includes five spacing elements, namely, a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The first spacing element P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacing element P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacing element P3 is placed on the image side of the third lens and is in at least partial contact with the image side surface of the third lens. The fourth spacing element P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens; the fifth spacing element P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side surface of the fifth lens.

[0095] Example 2

[0096] Figure 3 The structure diagram of the optical imaging lens according to Embodiment 2 of the present application is shown. In this embodiment, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted.

[0097] like Figure 3 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens of Example 2 has the same structure as the lens group of the optical imaging lens of Example 1. The basic parameters and the high-order coefficient table of the aspheric surface are detailed in Table 1 and Table 2, which will not be repeated here.

[0098] like Figure 3 As shown, the optical imaging lens further includes five spacing elements, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The difference between this embodiment and embodiment 1 is that the lens barrel and at least some elements in the spacing element group have different structural dimensions.

[0099] Example 3

[0100] Figure 4 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0101] like Figure 4 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens of Example 3 has the same structure as the lens group of the optical imaging lens of Example 1. The basic parameters and the high-order coefficient table of the aspheric surface are detailed in Table 1 and Table 2, which will not be repeated here.

[0102] like Figure 4 As shown, the optical imaging lens further includes five spacing elements, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The difference between this embodiment and embodiment 1 is that the lens barrel and at least some elements in the spacing element group have different structural dimensions.

[0103] Figure 5 (A1) shows the axial chromatic aberration curves of the optical imaging lenses of Examples 1 to 3, which represent the deviation of light rays of different wavelengths from the focal point behind the lens. Figure 5 (B1) in FIG. 1 shows the astigmatism curves of the optical imaging lenses of Examples 1 to 3, which represent the meridional image curvature and the sagittal image curvature. Figure 5(C1) in FIG. 1 shows the distortion curves of the optical imaging lenses of Examples 1 to 3, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 5 (D1) in FIG. 1 shows the magnification chromatic aberration curves of the optical imaging lenses of Examples 1 to 3, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. Figure 5 It can be seen that the optical imaging lenses of Examples 1 to 3 can achieve good imaging quality.

[0104] Example 4

[0105] Figure 6 FIG. 4 shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application. Figure 6 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The sixth lens E6 has an object side surface S11 and an image side surface S12.

[0106] The optical imaging lens further includes an autofocus assembly T disposed between the second lens E2 and the third lens E3. The optical imaging lens further includes an aperture STO (not shown) disposed between the second lens E2 and the third lens E3. More specifically, the aperture STO is disposed between the autofocus assembly T and the third lens E3.

[0107] Light from an object passes through the surfaces S1 to S12 in sequence and is finally imaged on an imaging surface (not shown).

[0108] Table 3 shows the basic parameters of the lens group of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness / distance and effective focal length are all millimeters (mm).

[0109] Table 3

[0110]

[0111] Table 4 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein each aspherical surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0112] Table 4

[0113]

[0114] like Figure 6 As shown, the optical imaging lens further includes five spacing elements, namely, a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The first spacing element P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacing element P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacing element P3 is placed on the image side of the third lens and is in at least partial contact with the image side surface of the third lens. The fourth spacing element P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens; the fifth spacing element P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side surface of the fifth lens.

[0115] Example 5

[0116] Figure 7 The structure diagram of the optical imaging lens according to Embodiment 5 of the present application is shown. In this embodiment, for the sake of brevity, some descriptions similar to Embodiment 4 will be omitted.

[0117] like Figure 7 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens of Example 5 has the same structure as the lens group of the optical imaging lens of Example 4. The basic parameters and the high-order coefficient table of the aspheric surface are detailed in Table 3 and Table 4, which will not be repeated here.

[0118] like Figure 7 As shown, the optical imaging lens further includes five spacing elements, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The difference between this embodiment and embodiment 4 is that the lens barrel and at least some elements in the spacing element group have different structural dimensions.

[0119] Example 6

[0120] Figure 8 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0121] like Figure 8 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens of Example 6 has the same structure as the lens group of the optical imaging lens of Example 4. The basic parameters and the high-order coefficient table of the aspheric surface are detailed in Table 3 and Table 4, which will not be repeated here.

[0122] like Figure 8As shown, the optical imaging lens further includes five spacing elements, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The difference between this embodiment and embodiment 4 is that the lens barrel and at least some elements in the spacing element group have different structural dimensions.

[0123] Fig. 9 (A2) in FIG. 1 shows the axial chromatic aberration curves of the optical imaging lenses of Examples 4 to 6, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Fig. 9 (B2) in FIG. 1 shows the astigmatism curves of the optical imaging lenses of Examples 4 to 6, which represent the meridional image curvature and the sagittal image curvature. Fig. 9 (C2) in FIG. 5 shows the distortion curves of the optical imaging lenses of Examples 4 to 6, which represent the distortion magnitude values ​​corresponding to different image heights. Fig. 9 (D2) in FIG. 4 shows the magnification chromatic aberration curves of the optical imaging lenses of Examples 4 to 6, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. Fig. 9 It can be seen that the optical imaging lenses of Examples 4 to 6 can achieve good imaging quality.

[0124] Example 7

[0125] Fig.10 FIG. 2 shows a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application. Fig.10 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The sixth lens E6 has an object side surface S11 and an image side surface S12.

[0126] The optical imaging lens further includes an autofocus assembly T disposed between the second lens E2 and the third lens E3. The optical imaging lens further includes an aperture STO (not shown) disposed between the second lens E2 and the third lens E3. More specifically, the aperture STO is disposed between the autofocus assembly T and the third lens E3.

[0127] Light from an object passes through the surfaces S1 to S12 in sequence and is finally imaged on an imaging surface (not shown).

[0128] Table 5 shows a basic parameter table of the lens group of the optical imaging lens of Example 7, wherein the units of the curvature radius, thickness / distance and effective focal length are all millimeters (mm).

[0129] Table 5

[0130]

[0131] Table 6 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 7, wherein each aspherical surface shape can be defined by the formula (1) given in the above Example 1.

[0132] Table 6

[0133]

[0134] like Fig.10 As shown, the optical imaging lens further includes five spacing elements, namely, a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The first spacing element P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacing element P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacing element P3 is placed on the image side of the third lens and is in at least partial contact with the image side surface of the third lens. The fourth spacing element P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens; the fifth spacing element P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side surface of the fifth lens.

[0135] Example 8

[0136] Fig.11 The structure diagram of the optical imaging lens according to Embodiment 8 of the present application is shown. In this embodiment, for the sake of brevity, some descriptions similar to Embodiment 7 will be omitted.

[0137] like Fig.11 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens of Example 8 has the same structure as the lens group of the optical imaging lens of Example 7. The basic parameters and the high-order coefficient table of the aspheric surface are detailed in Table 5 and Table 6, which will not be repeated here.

[0138] like Fig.11 As shown, the optical imaging lens further includes five spacing elements, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The difference between this embodiment and embodiment 7 is that the lens barrel and at least some elements in the spacing element group have different structural dimensions.

[0139] Example 9

[0140] Fig.12 A schematic structural diagram of an optical imaging lens according to Example 9 of the present application is shown.

[0141] like Fig.12 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group. The lens barrel is a split lens barrel, comprising a first lens barrel J1 and a second lens barrel J2. The lens group of the optical imaging lens of Example 9 has the same structure as the lens group of the optical imaging lens of Example 7. The basic parameters and the high-order coefficient table of the aspheric surface are detailed in Table 5 and Table 6, which will not be repeated here.

[0142] like Fig.12 As shown, the optical imaging lens further includes five spacing elements, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5. The difference between this embodiment and embodiment 7 is that the lens barrel and at least some elements in the spacing element group have different structural dimensions.

[0143] Fig.13 (A3) in FIG. 1 shows the axial chromatic aberration curves of the optical imaging lenses of Examples 7 to 9, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Fig.13 (B3) in FIG. 1 shows the astigmatism curves of the optical imaging lenses of Examples 7 to 9, which represent the meridional image curvature and the sagittal image curvature. Fig.13 (C3) in FIG. 1 shows the distortion curves of the optical imaging lenses of Examples 7 to 9, which represent the distortion magnitude values ​​corresponding to different image heights. Fig.13 (D3) in FIG. 1 shows the magnification chromatic aberration curves of the optical imaging lenses of Examples 7 to 9, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. Fig.13 It can be seen that the optical imaging lenses of Examples 7 to 9 can achieve good imaging quality.

[0144] Table 7 shows some parameter values ​​of the optical imaging lenses of Examples 1 to 9. The unit of Semi-FOV is degree (°), and the units of other parameters are millimeters (mm).

[0145] Table 7

[0146]

[0147] Table 8 gives the parameter values ​​of at least some of the elements in the lens barrel and the spacer element group of the optical imaging lens of Examples 1 to 9, all in millimeters (mm). Among them, some parameters can be calculated according to Figure 1 The measurement is carried out using the marking method shown.

[0148] Table 8

[0149]

[0150] In summary, the optical imaging lenses of Examples 1 to 9 satisfy the relationship shown in Table 9.

[0151] Table 9

[0152]

[0153] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0154] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that: Comprising: A lens barrel, and a lens group and a spacer element group disposed within the lens barrel, wherein, The lens group sequentially includes, from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; The spacer element group includes: a first spacer element, wherein the first spacer element is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens; The number of lenses with optical power in the optical imaging lens is six; The first lens has a negative optical power; The third lens has a positive optical power; The optical imaging lens satisfies: -0.15 ≤ (R1 - R2) / (R1 + R2) ≤ 0.65 and 0.15 < (DT11 - Yc11) / (d1s / 2) < 0.65; where R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, DT11 is the maximum effective radius of the object side surface of the first lens, Yc11 is the distance from the inflection point farthest from the optical axis in the effective diameter of the object side surface of the first lens to the optical axis, and d1s is the maximum inner diameter of the object side surface of the first spacer element in the direction perpendicular to the optical axis.

2. The optical imaging lens according to claim 1, wherein The spacer element group includes: a third spacer element, wherein the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens; The optical imaging lens satisfies: -1.10 < d3s / R6 - d3m / R7 < -0.65, where d3s is the maximum inner diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, d3m is the maximum inner diameter of the image side surface of the third spacer element in the direction perpendicular to the optical axis, R6 is the curvature radius of the image side surface of the third lens, and R7 is the curvature radius of the object side surface of the fourth lens.

3. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 2.00 < EP01 / CT1 < 3.55, where EP01 is the distance along the optical axis from the object side end face of the lens barrel to the object side surface of the first spacer element, and CT1 is the central thickness of the first lens on the optical axis.

4. The optical imaging lens according to claim 1, wherein The spacer element group includes: a fifth spacer element, wherein the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; The optical imaging lens satisfies: -1.70 < (d0m - d5m) / f5 < 1.45, where d0m is the maximum inner diameter of the image side end face of the lens barrel in the direction perpendicular to the optical axis, d5m is the maximum inner diameter of the image side surface of the fifth spacer element in the direction perpendicular to the optical axis, and f5 is the effective focal length of the fifth lens.

5. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 0.20 < (DT11 - DT12) / (d1s / 2) < 0.45, where DT11 is the maximum effective radius of the object side surface of the first lens, DT12 is the maximum effective radius of the image side surface of the first lens, and d1s is the maximum inner diameter of the object side surface of the first spacer element in the direction perpendicular to the optical axis.

6. The optical imaging lens according to claim 1, wherein the spacer element group further includes: a second spacer element and a third spacer element, wherein the second spacer element is disposed on the image side of the second lens and is at least partially in contact with the image side surface of the second lens, and the third spacer element is disposed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; the optical imaging lens satisfies: 4.35 < (D3s - d3s) / EP23 < 5.95, where D3s is the maximum outer diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, d3s is the maximum inner diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, and EP23 is the distance between the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis.

7. The optical imaging lens according to any one of claims 1-3, 5, and 6, wherein the spacer element group further includes: a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and is at least partially in contact with the image side surface of the fifth lens; the optical imaging lens satisfies: 4.50 < f45 / EP45 < 7.50, where f45 is the combined focal length of the fourth lens and the fifth lens, and EP45 is the distance between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis.

8. The optical imaging lens according to any one of claims 1-6, wherein the spacer element group further includes: a fourth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens; the optical imaging lens satisfies: -0.65 < d4s / R8 < 1.15, where d4s is the maximum inner diameter of the object side surface of the fourth spacer element in the direction perpendicular to the optical axis, and R8 is the curvature radius of the image side surface of the fourth lens.

9. The optical imaging lens according to claim 1, wherein the spacer element group includes: a third spacer element, wherein the third spacer element is disposed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; the optical imaging lens satisfies: 0.50 < d3s / R5 < 0.90, where d3s is the maximum inner diameter of the object side surface of the third spacer element in the direction perpendicular to the optical axis, and R5 is the curvature radius of the object side surface of the third lens.

10. The optical imaging lens according to any one of claims 1 to 3, 5 and 6, characterized in that: The spacer element group further includes: a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; The optical imaging lens satisfies: 1.15<(D4m-d4m) / (D5m-d5m)<1.40, wherein D4m is the maximum outer diameter of the image side surface of the fourth spacer element in a direction perpendicular to the optical axis, d4m is the maximum inner diameter of the image side surface of the fourth spacer element in a direction perpendicular to the optical axis, D5m is the maximum outer diameter of the image side surface of the fifth spacer element in a direction perpendicular to the optical axis, and d5m is the maximum inner diameter of the image side surface of the fifth spacer element in a direction perpendicular to the optical axis.

11. The optical imaging lens according to any one of claims 1 to 3, 5 and 6, characterized in that: The spacer element group further includes: a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; The optical imaging lens satisfies: 0.25≤|SAG52| / EP45<1.50, wherein |SAG52| is the absolute value of the on-axis distance between the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens, and EP45 is the distance between the image side surface of the fourth spacing element and the object side surface of the fifth spacing element along the optical axis.

12. The optical imaging lens according to claim 1, wherein: The spacer element group further includes: a third spacer element and a fourth spacer element, wherein the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens, and the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; The optical imaging lens satisfies: 1.20<(T34+CT4+T45) / EP34<1.65, wherein T34 is the air spacing between the third lens and the fourth lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, T45 is the air spacing between the fourth lens and the fifth lens on the optical axis, and EP34 is the distance between the image side surface of the third spacing element and the object side surface of the fourth spacing element along the optical axis.

13. The optical imaging lens according to any one of claims 1 to 3, 5 and 6, characterized in that: The spacer element group includes: a fifth spacer element, wherein the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; The optical imaging lens satisfies: 0.25 < Yc62 / d5m < 0.55, where d5m is the maximum inner diameter of the image side of the fifth spacer element in the direction perpendicular to the optical axis, and Yc62 is the distance from the inflection point farthest from the optical axis among the effective diameters of the image side of the sixth lens to the optical axis.

14. The optical imaging lens according to any one of claims 1-6, characterized in that the optical imaging lens further includes an autofocus assembly disposed between the second lens and the third lens.

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