Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a lens barrel, a six-piece lens group and a spacer group arranged in the lens barrel; the six-piece lens group comprises, in order from the object side to the image side along the optical axis, a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power and a sixth lens with negative refractive power; the spacer group comprises a fifth spacer arranged on the image side of the fifth lens and in contact with the image side of the fifth lens; wherein the maximum field of view FOV of the optical imaging lens satisfies 100°≤FOV≤150°; the effective focal length f6 of the sixth lens and the outer diameter D5m of the image side of the fifth spacer satisfy 1.40<|f6 / D5m|<2.30; and the outer diameter D0s of the object side end surface of the lens barrel, the outer diameter D0m of the image side end surface of the lens barrel, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens satisfy 2.20<(D0s-D0m) / (R11-R12)<9.60.

Description

Technical Field

[0001] This application relates to the field of optical devices, specifically to a six-element optical imaging lens. Background Technology

[0002] With the technological innovation of electronic devices, more new requirements have been put forward for the imaging function of electronic devices. For example, the imaging lens of electronic devices is designed as a wide-angle lens to obtain a larger image range.

[0003] Currently, six-element imaging lenses have become the mainstream. In order to achieve a large field of view in a six-element imaging lens, the first lens usually has a larger outer diameter. This results in the outer diameter of the first lens being larger than that of the other lenses. During assembly, the central axis of the first lens is prone to deviation from the central axes of the other lenses, which affects the imaging quality of the optical imaging lens. Summary of the Invention

[0004] This application provides an optical imaging lens that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] One aspect of this application provides an optical imaging lens comprising a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel; the six-element lens group comprises, arranged sequentially along the optical axis from the object side to the image side, a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power; the image-side surface of the first lens is concave; the object-side surface of the second lens is concave, and the image-side surface is convex; the object-side surface and the image-side surface of the third lens are both convex; the object-side surface of the fourth lens is convex, and the image-side surface is concave; the object-side surface and the image-side surface of the fifth lens are both convex; the sixth lens… The object-side surface is convex, and the image-side surface is concave. The spacer assembly includes a fifth spacer placed on and in contact with the image-side surface of the fifth lens. The maximum field of view (FOV) of the optical imaging lens satisfies: 100°≤FOV≤150°. The effective focal length f6 of the sixth lens and the outer diameter D5m of the image-side surface of the fifth spacer satisfy: 1.40<|f6 / D5m|<2.30. The outer diameter D0s of the object-side end face of the lens barrel, the outer diameter D0m of the image-side end face of the lens barrel, the radius of curvature R11 of the object-side surface of the sixth lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: 2.20<(D0s-D0m) / (R11-R12)<9.60.

[0006] According to an exemplary embodiment of this application, the spacer assembly further includes a first spacer disposed on and in contact with the image-side surface of the first lens, wherein the inner diameter d0s of the object-side end face of the lens barrel, the inner diameter d0m of the image-side end face of the lens barrel, and the total effective focal length f of the optical imaging lens satisfy: 2.00 < (d0s - d0m) / f < 5.00; the inner diameter d1s of the object-side surface of the first spacer, the outer diameter D1s of the object-side surface of the first spacer, and the effective focal length f1 of the first lens satisfy: -2.80 < (D1s - d1s) / f1 < -0.70.

[0007] According to an exemplary embodiment of this application, the outer diameter D1s of the object side of the first spacer, the effective focal length f1 of the first lens, the outer diameter D5s of the object side of the fifth spacer, and the effective focal length f5 of the fifth lens satisfy: 0<|D1s / f1|-|D5s / f5|<2.15.

[0008] According to an exemplary embodiment of this application, the spacer group further includes a second spacer disposed on the image side of the second lens and in contact with the image side of the second lens, wherein the inner diameter d1s of the object side of the first spacer, the outer diameter D1s of the object side of the first spacer, the spacing EP12 of the first spacer and the second spacer along the optical axis and the relative F number Fno of the optical imaging lens satisfy: 1.8 < (D1s-d1s) / EP12×Fno < 9.00.

[0009] According to an exemplary embodiment of this application, the spacer group further includes a second spacer disposed on and in contact with the image side of the second lens, wherein the spacing EP12 between the first spacer and the second spacer along the optical axis, the combined focal length f12 of the first lens and the second lens, the Abbe number V1 of the first lens and the Abbe number V2 of the second lens satisfy: -3.80 < (V1-V2) × EP12 / f12 < -2.30.

[0010] According to an exemplary embodiment of this application, the spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens, wherein the distance EP01 between the object-side end face of the lens barrel and the first spacer along the optical axis and the distance EP12 between the first spacer and the second spacer along the optical axis satisfy: 1.00 <EP01 / EP12<2.20。

[0011] According to an exemplary embodiment of this application, the spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens, wherein the inner diameter d1s of the object-side surface of the first spacer, the outer diameter D2s of the object-side surface of the second spacer, the air gap T12 between the first and second lenses on the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy: 3.10 <d1s / T12×(D2s / CT2)<5.8。

[0012] According to an exemplary embodiment of this application, the spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens, wherein the inner diameter d1s of the object-side surface of the first spacer, the outer diameter D2s of the object-side surface of the second spacer, the center thickness CT1 of the first lens on the optical axis, and the radius of curvature R2 of the image-side surface of the first lens satisfy: 0.15 <d1s×CT1 / (D2s×R2)<0.60。

[0013] According to an exemplary embodiment of this application, the spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens, wherein the combined focal length f12 of the first and second lenses, the combined focal length f23 of the second and third lenses, the inner diameter d1s of the object-side surface of the first spacer, and the inner diameter d2s of the object-side surface of the second spacer satisfy: -9.65 <f12 / d1s+f23 / d2s<-5.80。

[0014] According to an exemplary embodiment of this application, the spacer group further includes a second spacer disposed on the image-side surface of the second lens and in contact with the image-side surface of the second lens, and a third spacer disposed on the image-side surface of the third lens and in contact with the image-side surface of the third lens, wherein the center thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the spacing EP23 of the second spacer and the third spacer along the optical axis satisfy: 6.00≤(CT1+T12+CT2) / EP23≤14.20.

[0015] According to an exemplary embodiment of this application, the spacer assembly further includes a third spacer disposed on and in contact with the image-side surface of the third lens, and a fourth spacer disposed on and in contact with the image-side surface of the fourth lens, wherein the spacing EP34 between the third and fourth spacers along the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the inner diameter d4s of the object-side surface of the fourth spacer, and the inner diameter d5s of the object-side surface of the fifth spacer satisfy: 0.70 <EP34 / CT4×(d4s / d5s)<2.60。

[0016] According to an exemplary embodiment of the present application, the spacer group further includes a first spacer disposed on the image side surface of the first lens and in contact with the image side surface of the first lens, and a second spacer disposed on the image side surface of the second lens and in contact with the image side surface of the second lens. The outer diameter D1m of the image side surface of the first spacer and the outer diameter D2m of the image side surface of the second spacer satisfy: 0.80 < D1m / D2m < 2.50; the length L of the lens barrel in the direction of the optical axis, the total effective focal length f of the optical imaging lens, the interval EP34 between the third spacer and the fourth spacer along the optical axis, and the interval EP45 between the fourth spacer and the fifth spacer along the optical axis satisfy: 5.80 < L / f + EP34 / EP45 < 7.90.

[0017] According to an exemplary embodiment of the present application, the outer diameter D0m of the image side end surface of the lens barrel and the outer diameter D5s of the object side surface of the fifth spacer satisfy: 1.30 < D0m / D5s < 2.20.

[0018] In some embodiments of the present application, by controlling the optical imaging lens to satisfy "100° ≤ FOV ≤ 150°" and "1.40 < |f6 / D5m| < 2.30", while ensuring that the optical imaging lens has a large field of view angle and a large imaging range, the field curvature of the edge field of view can be effectively corrected. However, the larger the field of view angle of the optical imaging lens, the larger the outer diameter of the first lens. During assembly, there is a deviation between the central axis of the first lens and the central axes of other lenses, which will affect the imaging quality of the optical imaging lens. Therefore, by controlling the mutual relationship between the outer diameter of the object side end surface of the lens barrel, the outer diameter of the image side end surface of the lens barrel, and the curvature radii of the object side surface and the image side surface of the sixth lens, the outer diameters of the first lens and the sixth lens can be constrained within a reasonable range, effectively ensuring that each lens has appropriate assembly stability in the optical axis direction, avoiding the phenomenon that the central axis deviation of each lens is too large due to excessive assembly step difference. At the same time, the difference between the curvature radii of the object side surface and the image side surface of the sixth lens is small, and the change in the surface shape of the sixth lens during the assembly process is also smaller, which is beneficial to reducing the light exit angle. Therefore, compared with the lens with a large surface shape difference, the performance loss and assembly yield problems caused by eccentricity are also smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings, in which:

[0020] Figure 1A shows a schematic structural diagram of an optical imaging lens according to the present application;

[0021] Figure 1BThe eccentricity sensitivity table of the first lens and the sixth lens is shown when the optical imaging lens according to this application satisfies (D0s-D0m) / (R11-R12)=9.01;

[0022] Figure 1C The eccentricity sensitivity table of the first lens and the sixth lens is shown when the optical imaging lens according to this application satisfies (D0s-D0m) / (R11-R12)=11.00;

[0023] Figure 1D The eccentricity sensitivity table of the first lens and the sixth lens is shown when the optical imaging lens according to this application satisfies (D0s-D0m) / (R11-R12)=1.85;

[0024] Figure 2 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown;

[0025] Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown;

[0026] Figure 4 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown;

[0027] Figures 5A to 5C The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiments 1, 2, or 3 of this application are shown respectively.

[0028] Figure 6 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0029] Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0030] Figure 8 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0031] Figures 9A to 9C The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiments 4, 5, or 6 of this application are shown respectively.

[0032] Figure 10 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown;

[0033] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown;

[0034] Figure 12A schematic diagram of the structure of an optical imaging lens according to Embodiment 9 of this application is shown; and

[0035] Figures 13A to 13C The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiments 7, 8, or 9 of this application are shown respectively. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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 drawn strictly to scale.

[0039] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0040] It should also be understood that the terms "comprising" and / or "having," 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 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.

[0041] 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 the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense, unless expressly so specified herein.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] Figure 1A This is a structural layout diagram and a schematic diagram of some parameters of an optical imaging lens according to an exemplary embodiment of this application. (Reference) Figure 1A d1s represents the inner diameter of the object-side surface of the first spacer, D1s represents the outer diameter of the object-side surface of the first spacer, D1m represents the outer diameter of the image-side surface of the first spacer, d2s represents the inner diameter of the object-side surface of the second spacer, D2s represents the outer diameter of the object-side surface of the second spacer, D2m represents the outer diameter of the image-side surface of the second spacer, d4s represents the inner diameter of the object-side surface of the fourth spacer, d5s represents the inner diameter of the object-side surface of the fifth spacer, D5s represents the outer diameter of the object-side surface of the fifth spacer, D5m represents the outer diameter of the image-side surface of the fifth spacer, and d0s represents the inner diameter of the object-side surface of the lens barrel. The inner diameter of the end face, d0m represents the inner diameter of the image-side end face of the lens barrel, D0s represents the outer diameter of the object-side end face of the lens barrel, EP01 represents the distance between the object-side end face of the lens barrel and the first spacer along the optical axis, EP12 represents the distance between the first and second spacers along the optical axis, EP23 represents the distance between the second and third spacers along the optical axis, EP34 represents the distance between the third and fourth spacers along the optical axis, EP45 represents the distance between the fourth and fifth spacers along the optical axis, and L represents the length of the lens barrel in the direction of the optical axis.

[0044] refer to Figures 2 to 4 , Figures 6 to 8 as well as Figures 10 to 12 The first aspect of this application provides an optical imaging lens that may include a six-element lens group, which may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side. An air gap may exist between any two adjacent lenses in the first to sixth lenses.

[0045] In an exemplary embodiment, the first lens may have negative optical power, and its image-side surface may be concave. The second lens may have positive optical power, its object-side surface may be concave, and its image-side surface may be convex. The third lens may have positive optical power, and both its object-side and image-side surfaces may be convex. The fourth lens may have negative optical power, its object-side surface may be convex, and its image-side surface may be concave. The fifth lens may have positive optical power, and both its object-side and image-side surfaces may be convex. The sixth lens may have negative optical power, its object-side surface may be convex, and its image-side surface may be concave.

[0046] In an exemplary embodiment, the optical imaging lens may further include a group of spacers, which may include one or more of a first spacer, a second spacer, a third spacer, a fourth spacer, and a fifth spacer. The first spacer may be positioned on the image-side surface of the first lens and at least partially in contact with it. The second spacer may be positioned on the image-side surface of the second lens and at least partially in contact with it. The third spacer may be positioned on the image-side surface of the third lens and at least partially in contact with it. The fourth spacer may be positioned on the image-side surface of the fourth lens and at least partially in contact with it. The fifth spacer may be positioned on the image-side surface of the fifth lens and at least partially in contact with it. Proper use of spacers can effectively mitigate stray light risks, reduce interference with image quality, and thus improve the imaging quality of the optical imaging lens.

[0047] In an exemplary embodiment, the optical imaging lens may further include a lens barrel, with a six-element lens group and a spacer group disposed within the lens barrel. The lens barrel may include an object-side end face, an image-side end face, an outer ring surface, and an inner ring 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 furthest from the optical axis is the outer ring surface, and the surface of the lens barrel closest to the optical axis is the inner ring surface. Furthermore, the inner ring surface of the lens barrel is stepped.

[0048] In an exemplary embodiment, the maximum field of view (FOV) of the optical imaging lens can satisfy: 100°≤FOV≤150°; the effective focal length f6 of the sixth lens and the outer diameter D5m of the image side of the fifth spacer can satisfy: 1.40<|f6 / D5m|<2.30; and the outer diameter D0s of the object side end face of the lens barrel, the outer diameter D0m of the image side end face of the lens barrel, the radius of curvature R11 of the object side face of the sixth lens and the radius of curvature R12 of the image side face of the sixth lens can satisfy: 2.20<(D0s-D0m) / (R11-R12)<9.60. By controlling the optical imaging lens to meet "100°≤FOV≤150°" and "1.40<|f6 / D5m|<2.30", the field curvature of the edge field of view can be effectively corrected while ensuring that the optical imaging lens has a large field of view and a large imaging range. However, the larger the field of view of the optical imaging lens, the larger the outer diameter of the first lens. During assembly, the central axis of the first lens deviates from the central axis of other lenses, which will affect the imaging quality of the optical imaging lens. Therefore, by controlling the relationship between the outer diameter of the object-side end face of the lens barrel, the outer diameter of the image-side end face of the lens barrel, and the curvature radii of the object-side and image-side faces of the sixth lens, the outer diameters of the first and sixth lenses can be constrained within a reasonable range. This effectively ensures that each lens has appropriate assembly stability in the optical axis direction, avoiding excessive deviation of the central axis of each lens due to excessive assembly stage differences. At the same time, the difference in curvature radii between the object-side and image-side faces of the sixth lens is small, resulting in less surface shape change during the assembly process of the sixth lens, which is beneficial for reducing the exit angle of light. Therefore, compared with lenses with large surface shape differences, the performance loss and assembly yield problems caused by its eccentricity are also smaller.

[0049] The following is combined Figures 1B to 1D This further illustrates the relationship between the lens's eccentricity and sensitivity. Figures 1B to 1D In the symbols "+" and "-" for +1μm and -1μm, the field curve shift of the MTF curve is indicated. The "F" in "0.1F", "0.2F", "0.3F", "0.4F", "0.5F", "0.6F", "0.7F", "0.8F", "0.9F" and "1.0F" indicates the field of view.

[0050] Figure 1BThe diagram illustrates the sensitivity of the eccentricity values ​​of the first and sixth lenses to the field curvature in the T-direction when (D0s-D0m) / (R11-R12) = 9.01, i.e., when the optical imaging lens satisfies 2.20 < (D0s-D0m) / (R11-R12) < 9.60. For example, at a field of view of 1.0, when the eccentricity value of the first lens deviates by +1 μm from the design value, the offset of the field curvature in the T-direction is -0.02 μm; when the eccentricity value of the first lens deviates by -1 μm from the design value, the offset of the field curvature in the T-direction is 0.05 μm. Similarly, when the eccentricity value of the sixth lens deviates by +1 μm from the design value, the offset of the field curvature in the T-direction is -7.16 μm; and when the eccentricity value of the sixth lens deviates by -1 μm from the design value, the offset of the field curvature in the T-direction is 7.26 μm.

[0051] Figure 1C The diagram illustrates the sensitivity of the eccentricity values ​​of the first and sixth lenses to the field curvature in the T-direction when (D0s-D0m) / (R11-R12) = 11.00, i.e., when the optical imaging lens does not satisfy 2.20 < (D0s-D0m) / (R11-R12) < 9.60. For example, at a field of view of 1.0, when the eccentricity value of the first lens deviates by +1 μm from the design value, the offset of the field curvature in the T-direction is -1.27 μm; when the eccentricity value of the first lens deviates by -1 μm from the design value, the offset of the field curvature in the T-direction is 1.26 μm. Similarly, when the eccentricity value of the sixth lens deviates by +1 μm from the design value, the offset of the field curvature in the T-direction is -10.61 μm; and when the eccentricity value of the sixth lens deviates by -1 μm from the design value, the offset of the field curvature in the T-direction is 11.79 μm.

[0052] Figure 1D The diagram illustrates the sensitivity of the eccentricity values ​​of the first and sixth lenses to the field curvature in the T-direction when (D0s-D0m) / (R11-R12) = 1.85, i.e., when the optical imaging lens does not satisfy 2.20 < (D0s-D0m) / (R11-R12) < 9.60. For example, at a field of view of 1.0, when the eccentricity value of the first lens deviates by +1 μm from the design value, the offset of the field curvature in the T-direction is -0.50 μm; when it deviates by -1 μm, the offset is 0.44 μm. Similarly, when the eccentricity value of the sixth lens deviates by +1 μm from the design value, the offset is 8.04 μm; and when it deviates by -1 μm, the offset is -8.67 μm.

[0053] from Figures 1B to 1DBased on the provided data, compared to (D0s-D0m) / (R11-R12)=11.00 and (D0s-D0m) / (R11-R12)=1.85, when the optical imaging lens satisfies (D0s-D0m) / (R11-R12)=9.01, the sensitivity of the eccentricity values ​​of the first and sixth lenses to the field curvature in the T direction is significantly reduced. It is evident that when the optical imaging lens satisfies "2.20<(D0s-D0m) / (R11-R12)<9.60", the sensitivity of the eccentricity values ​​of both the first and sixth lenses to the field curvature in the T direction is low, which can improve the MTF yield of the optical imaging lens.

[0054] In an exemplary embodiment, the maximum field of view (FOV) of the optical imaging lens can satisfy: 100°≤FOV≤150°; the inner diameter d0s of the object-side end face of the lens barrel, the inner diameter d0m of the image-side end face of the lens barrel, and the total effective focal length f of the optical imaging lens can satisfy: 2.00<(d0s-d0m) / f<5.00; the inner diameter d1s of the object-side surface of the first spacer, the outer diameter D1s of the object-side surface of the first spacer, and the effective focal length f1 of the first lens can satisfy: -2.80<(D1s-d1s) / f1<-0.70. By controlling the optical imaging lens to meet the requirements of "100°≤FOV≤150°" and "2.00<(d0s-d0m) / f<5.00", the length of the lens barrel along the optical axis can be reduced while ensuring a large field of view and a wide shooting range. However, the larger the field of view of the optical imaging lens, the larger the head size of the lens, which is not conducive to achieving a thinner and lighter design. Therefore, by controlling the relationship between the inner and outer diameters of the object-side surface of the first spacer and the effective focal length of the first lens, the head size of the optical imaging lens can be reduced as much as possible while ensuring its performance, which is beneficial for achieving a thinner and lighter optical imaging lens.

[0055] In an exemplary embodiment, the outer diameter D1s of the object side of the first spacer, the effective focal length f1 of the first lens, the outer diameter D5s of the object side of the fifth spacer, and the effective focal length f5 of the fifth lens can satisfy: 0 < |D1s / f1| - |D5s / f5| < 2.15. By controlling the relationship between the outer diameter of the object side of the first spacer, the effective focal length of the first lens, the outer diameter of the object side of the fifth spacer, and the effective focal length of the fifth lens, the shapes of the first and fifth lenses can be constrained, which is beneficial to the processing and shaping of the first and fifth lenses. At the same time, the outer diameters of the first and fifth lenses can be limited to a certain range, avoiding the phenomenon of excessive assembly differences between lenses due to excessive differences in outer diameter, thereby improving the assembly stability and yield of the optical imaging lens.

[0056] In an exemplary embodiment, the inner diameter d1s of the object side surface of the first spacer, the outer diameter D1s of the object side surface of the first spacer, the spacing EP12 between the first spacer and the second spacer along the optical axis, and the relative F-number Fno of the optical imaging lens may satisfy: 1.8 < (D1s - d1s) / EP12 × Fno < 9.00. By controlling the interrelationships among the inner and outer diameters of the object side surface of the first spacer, the spacing between the first spacer and the second spacer along the optical axis, and the relative F-number of the optical imaging lens, the size of the optical imaging lens can be reduced while ensuring a reasonable relative F-number for the optical imaging lens, thereby leaving sufficient debugging and compensation space for the assembly of the module end and the chip while ensuring high resolution of the imaging of the optical imaging lens.

[0057] In an exemplary embodiment, the spacing EP12 between the first spacer and the second spacer along the optical axis, the combined focal length f12 of the first lens and the second lens, the Abbe number V1 of the first lens, and the Abbe number V2 of the second lens may satisfy: -3.80 < (V1 - V2) × EP12 / f12 < -2.30. By controlling the interrelationships among the spacing between the first spacer and the second spacer along the optical axis, the combined focal length of the first lens and the second lens, the Abbe number of the first lens, and the Abbe number of the second lens, a relatively large difference in the Abbe numbers between the first lens and the second lens can be achieved, and the combined focal length of the first lens and the second lens is negative, which is beneficial to optimizing the chromatic aberration of the optical imaging lens, ensuring that the position of the back focal plane remains consistent when the optical imaging lens operates in the visible and infrared bands, and at the same time taking into account that the spacing between the first spacer and the second spacer along the optical axis is constrained within a reasonable range, which helps to stabilize the assembly stability of the first lens and the second lens and the emergence angle of light.

[0058] In an exemplary embodiment, the spacing EP01 between the object side end face of the lens barrel and the first spacer along the optical axis and the spacing EP12 between the first spacer and the second spacer along the optical axis may satisfy: 1.00 < EP01 / EP12 < 2.20. By controlling the interrelationship between the spacing between the object side end face of the lens barrel and the first spacer along the optical axis and the spacing between the first spacer and the second spacer along the optical axis, the edge thicknesses of the first lens and the second lens can be respectively constrained within a reasonable range, avoiding the problem of breakage of the edge of the second lens during the assembly process due to too small edge thickness of the second lens, and avoiding the problem of affecting the molding and surface shape of the first lens due to too large edge thickness of the first lens.

[0059] In an exemplary embodiment, the inner diameter d1s of the object side surface of the first spacer, the outer diameter D2s of the object side surface of the second spacer, the air gap T12 between the first lens and the second lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis may satisfy: 3.10 < d1s / T12 × (D2s / CT2) < 5.8. By controlling the interrelationships among the inner diameter of the object side surface of the first spacer, the outer diameter of the object side surface of the second spacer, the air gap between the first lens and the second lens on the optical axis, and the central thickness of the second lens on the optical axis, the air gap between the first lens and the second lens on the optical axis and the central thickness of the second lens on the optical axis can be respectively constrained within reasonable ranges, improving the assembly stability of the second lens. At the same time, it can also save space, reduce the size of the optical imaging lens, facilitate the realization of the lightness and thinness of the optical imaging lens, and reduce costs.

[0060] In an exemplary embodiment, the inner diameter d1s of the object side surface of the first spacer, the outer diameter D2s of the object side surface of the second spacer, the central thickness CT1 of the first lens on the optical axis, and the radius of curvature R2 of the image side surface of the first lens may satisfy: 0.15 < d1s × CT1 / (D2s × R2) < 0.60. By controlling the interrelationships among the inner diameter of the object side surface of the first spacer, the outer diameter of the object side surface of the second spacer, the central thickness of the first lens on the optical axis, and the radius of curvature of the image side surface of the first lens, the central thickness of the first lens on the optical axis can be constrained to avoid abnormal static aging performance of the optical imaging lens, which is beneficial to adjusting the field curvature of the optical imaging lens. At the same time, the radius of curvature of the image side surface of the first lens can also be constrained within a reasonable range, which is beneficial to optimizing the specular reflection ghost image of the optical imaging lens and avoiding abnormal demolding during the molding of the first lens.

[0061] In an exemplary embodiment, the combined focal length f12 of the first lens and the second lens, the combined focal length f23 of the second lens and the third lens, the inner diameter d1s of the object side surface of the first spacer, and the inner diameter d2s of the object side surface of the second spacer may satisfy: -9.65 < f12 / d1s + f23 / d2s < -5.80. By controlling the interrelationships among the combined focal length of the first lens and the second lens, the combined focal length of the second lens and the third lens, the inner diameter of the object side surface of the first spacer, and the inner diameter of the object side surface of the second spacer, the shapes of the first lens, the second lens, and the third lens can be constrained, which is beneficial to the processing and molding of the first lens, the second lens, and the third lens. At the same time, the inner diameters of the first spacer and the second spacer can also be constrained within reasonable ranges, avoiding problems such as light blocking by the spacer and low relative illumination of the optical imaging lens caused by too small inner diameters, and avoiding problems such as inability to limit the path of marginal rays of the lens and excessive stray light caused by too large inner diameters.

[0062] In an exemplary embodiment, the central thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, and the gap EP23 between the second spacer and the third spacer along the optical axis may satisfy: 6.00 ≤ (CT1 + T12 + CT2) / EP23 ≤ 14.20. By controlling the interrelationship among the central thickness of the first lens on the optical axis, the air gap between the first lens and the second lens on the optical axis, the central thickness of the second lens on the optical axis, and the gap between the second spacer and the third spacer along the optical axis, it is beneficial to increase the chief ray angle (CRA) of the optical imaging lens, achieve a large image plane of the optical imaging lens, and at the same time, the biconvex structure can ensure that the first lens and the second lens will not deform during the assembly process, improving the assembly stability of the optical imaging lens.

[0063] In an exemplary embodiment, the gap EP34 between the third spacer and the fourth spacer along the optical axis, the central thickness CT4 of the fourth lens on the optical axis, the inner diameter d4s of the object side of the fourth spacer, and the inner diameter d5s of the object side of the fifth spacer may satisfy: 0.70 < EP34 / CT4 × (d4s / d5s) < 2.60. By controlling the interrelationship among the gap between the third spacer and the fourth spacer along the optical axis, the central thickness of the fourth lens on the optical axis, the inner diameter of the object side of the fourth spacer, and the inner diameter of the object side of the fifth spacer, it is possible to make the effective diameter portions of the third lens and the fourth lens fit together, avoid stray light generated due to excessive difference in the effective diameters of the third lens and the fourth lens, and at the same time, ensure that the specifications of the spacer are appropriate, which is beneficial to adjusting the field curvature of the optical imaging lens during assembly.

[0064] In an exemplary embodiment, the outer diameter D1m of the image side surface of the first spacer and the outer diameter D2m of the image side surface of the second spacer may satisfy: 0.80 < D1m / D2m < 2.50; the length L of the lens barrel in the direction of the optical axis, the total effective focal length f of the optical imaging lens, the interval EP34 between the third spacer and the fourth spacer along the optical axis, and the interval EP45 between the fourth spacer and the fifth spacer along the optical axis may satisfy: 5.80 < L / f + EP34 / EP45 < 7.90. By controlling the ratio of the outer diameter of the image side surface of the first spacer to the outer diameter of the image side surface of the second spacer within the range of 0.80 to 2.50, the outer diameter size of the optical imaging lens can be constrained to meet the module requirements; at the same time, by reasonably controlling the mutual relationship among the length of the lens barrel in the direction of the optical axis, the total effective focal length of the optical imaging lens, the interval between the third spacer and the fourth spacer along the optical axis, and the interval between the fourth spacer and the fifth spacer along the optical axis, the length of the lens barrel in the direction of the optical axis, the edge thickness of the fourth lens, and the edge thickness of the fifth lens can be respectively constrained, effectively reducing the size of the optical imaging lens, thereby achieving miniaturization of the optical imaging lens.

[0065] In an exemplary embodiment, the outer diameter D0m of the image side end surface of the lens barrel and the outer diameter D5s of the object side surface of the fifth spacer may satisfy: 1.30 < D0m / D5s < 2.20. By constraining the ratio of the outer diameter of the image side end surface of the lens barrel to the outer diameter of the object side surface of the fifth spacer within the range of 1.30 to 2.20, the wall thickness of the lens barrel can be ensured to be within a reasonable range, avoiding problems such as poor true roundness and coaxiality of the inner diameter of the lens barrel during the molding process and easy eccentricity during lens assembly, and improving the overall yield of the optical imaging lens.

[0066] In an exemplary embodiment, the effective focal length f6 of the sixth lens and the outer diameter D5m of the image side surface of the fifth spacer may satisfy: 1.40 < |f6 / D5m| < 2.30. By controlling the ratio of the effective focal length of the sixth lens to the outer diameter of the image side surface of the fifth spacer within the range of 1.40 to 2.30, the shape of the sixth lens can be constrained, and at the same time, the outer diameter of the sixth lens can be constrained by using the outer diameter of the image side surface of the fifth spacer, which is beneficial to the processing and molding of the sixth lens and ensures the surface shape of the sixth lens.

[0067] In an exemplary embodiment, the optical imaging lens may further include an aperture disposed between the second lens and the third lens.

[0068] The optical imaging lens according to the above embodiment of the present application may employ six lenses and at least one spacer. By reasonably allocating the parameters of each lens and each spacer, miniaturization of the optical imaging lens can be achieved, the stray light phenomenon of the optical imaging lens can be improved, and the assembly stability and imaging quality of the optical imaging lens can be enhanced.

[0069] In embodiments of this application, at least one of the surfaces of the first to sixth lenses is an aspherical surface. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, both the object-side and image-side surfaces of the first to sixth lenses are aspherical surfaces.

[0070] A second aspect of this application provides an optical imaging lens comprising a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side. The spacer group may include a first spacer disposed on and in contact with the image side side of the first lens.

[0071] The maximum field of view (FOV) of the optical imaging lens can satisfy: 100°≤FOV≤150°; the inner diameter d0s of the object-side end face of the lens barrel, the inner diameter d0m of the image-side end face of the lens barrel, and the total effective focal length f of the optical imaging lens can satisfy: 2.00<(d0s-d0m) / f<5.00; the inner diameter d1s of the object-side surface of the first spacer, the outer diameter D1s of the object-side surface of the first spacer, and the effective focal length f1 of the first lens can satisfy: -2.80<(D1s-d1s) / f1<-0.70. By controlling the optical imaging lens to meet the requirements of "100°≤FOV≤150°" and "2.00<(d0s-d0m) / f<5.00", the length of the lens barrel along the optical axis can be reduced while ensuring a large field of view and a wide shooting range. However, the larger the field of view of the optical imaging lens, the larger the head size of the lens, which is not conducive to achieving a thinner and lighter design. Therefore, by controlling the relationship between the inner and outer diameters of the object-side surface of the first spacer and the effective focal length of the first lens, the head size of the optical imaging lens can be reduced as much as possible while ensuring its performance, which is beneficial for achieving a thinner and lighter optical imaging lens.

[0072] Those skilled in the art will understand that, without departing from the technical solutions claimed in this application, the number of lenses and spacers constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0073] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the optical imaging lens applicable to the above-described embodiments.

[0074] Example 1

[0075] The following is for reference Figure 2 Describes an optical imaging lens according to Embodiment 1 of this application.

[0076] like Figure 2 As shown, the optical imaging lens 100 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO may be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacer group also includes a second auxiliary spacer P2b disposed on the image-side surface of the second spacer P2 and at least partially in contact with the image-side surface of the second spacer P2. The spacers can block excess light during the imaging process from entering the next lens, while simultaneously allowing the lens to better contact the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0077] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane.

[0078] Table 1 shows the basic parameters of the optical imaging lens of Example 1, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0079]

[0080] Table 1

[0081] In this embodiment, the total effective focal length f of the optical imaging lens is 1.17 mm, the maximum field of view (FOV) of the optical imaging lens is 100.00°, the relative F-number (Fno) of the optical imaging lens is 1.79, the combined focal length f12 of the first lens and the second lens is -18.01 mm, and the combined focal length f23 of the second lens and the third lens is 1.41 mm.

[0082] 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 of each aspherical lens is... The following aspherical formulas can be used for limitation:

[0083] (1)

[0084] in, For an aspherical surface along the optical axis at a height of h When the position is such that the distance from the vertex of the non-spherical surface is the sag; c For the paraxial curvature of an aspherical surface, c =1 / R (i.e., paraxial curvature) c (The reciprocal of the radius of curvature R in Table 1 above). k The conic coefficient; Ai Is it an aspherical first i -th order correction coefficients. Table 2 gives the higher-order coefficients that can be used for the aspherical surfaces S1-S12 in Example 1. A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0085]

[0086] Table 2

[0087] Example 2

[0088] The following is for reference Figure 3 Describes an optical imaging lens according to Embodiment 2 of this application.

[0089] like Figure 3As shown, the optical imaging lens 200 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO can be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0090] The structure of the effective diameter portion of the lens in this embodiment is the same as that of the lens in Embodiment 1. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 1, and the aspherical coefficient table is the same as Table 2. The difference between this embodiment and Embodiment 1 is that the structural dimensions of the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, and the fifth spacer P5 are different. For example, the parameters d1s, D1s, D1m, d2s, D2s, D2m, d4s, d5s, D5s, D5m, d0s, d0m, D0s, D0m, EP01, EP12, EP23, EP34, EP45, and L are different.

[0091] Example 3

[0092] The following is for reference Figure 4 Describes an optical imaging lens according to Embodiment 3 of this application.

[0093] like Figure 4 As shown, the optical imaging lens 300 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO can be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0094] The structure of the effective diameter portion of the lens in this embodiment is the same as that of the lens in Embodiment 1. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 1, and the aspherical coefficient table is the same as Table 2. The difference between this embodiment and Embodiment 1 is that the structural dimensions of the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, and the fifth spacer P5 are different. For example, the parameters d1s, D1s, D1m, d2s, D2s, D2m, d4s, d5s, D5s, D5m, d0s, d0m, D0s, D0m, EP01, EP12, EP23, EP34, EP45, and L are different.

[0095] Figure 5A The on-axis chromatic aberration curves of the optical imaging lenses of Examples 1, 2, and 3 are shown, which represent the deviation of the focal point of light of different wavelengths after passing through the optical imaging lenses. Figure 5B The astigmatism curves of the optical imaging lenses of Examples 1, 2, and 3 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 5C The magnification chromatic aberration curves of the optical imaging lenses of Examples 1, 2, and 3 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to... Figures 5A to 5C It can be seen that the optical imaging lenses given in Examples 1, 2, and 3 can achieve good imaging quality.

[0096] Example 4

[0097] The following is for reference Figure 6 The optical imaging lens according to Embodiment 4 of this application is described.

[0098] like Figure 6 As shown, the optical imaging lens 400 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO can be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0099] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane.

[0100] Table 3 shows the basic parameters of the optical imaging lens of Example 4, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0101]

[0102] Table 3

[0103] In this embodiment, the total effective focal length f of the optical imaging lens is 1.17 mm, the maximum field of view (FOV) of the optical imaging lens is 140.00°, the relative F-number (Fno) of the optical imaging lens satisfies 1.79, the combined focal length f12 of the first lens and the second lens is -18.10 mm, and the combined focal length f23 of the second lens and the third lens is 1.37 mm.

[0104] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 4 shows the higher-order coefficients that can be used for each aspherical surface S1-S12 in Embodiment 4. A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A30 .

[0105]

[0106] Table 4

[0107] Example 5

[0108] The following is for reference Figure 7 Describes an optical imaging lens according to Embodiment 5 of this application.

[0109] like Figure 7 As shown, the optical imaging lens 500 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO may be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacer group may also include a third auxiliary spacer P3b disposed on the image-side surface of the third spacer P3 and at least partially in contact with the image-side surface of the third spacer P3. The spacers can block excess light during the imaging process from entering the next lens, while simultaneously allowing the lens to better contact the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0110] The structure of the effective diameter portion of the lens in this embodiment is the same as that of the lens in Embodiment 4. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 3, and the aspherical coefficient table is the same as Table 4. The difference between this embodiment and Embodiment 4 is that the structural dimensions of the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, and the fifth spacer P5 are different. For example, the parameters d1s, D1s, D1m, d2s, D2s, D2m, d4s, d5s, D5s, D5m, d0s, d0m, D0s, D0m, EP01, EP12, EP23, EP34, EP45, and L are different.

[0111] Example 6

[0112] The following is for reference Figure 8 Describes an optical imaging lens according to Embodiment 6 of this application.

[0113] like Figure 8As shown, the optical imaging lens 600 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO can be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0114] The structure of the effective diameter portion of the lens in this embodiment is the same as that of the lens in Embodiment 4. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 3, and the aspherical coefficient table is the same as Table 4. The difference between this embodiment and Embodiment 4 is that the structural dimensions of the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, and the fifth spacer P5 are different. For example, the parameters d1s, D1s, D1m, d2s, D2s, D2m, d4s, d5s, D5s, D5m, d0s, d0m, D0s, D0m, EP01, EP12, EP23, EP34, EP45, and L are different.

[0115] Figure 9A The on-axis chromatic aberration curves of the optical imaging lenses of Examples 4, 5, and 6 are shown, which represent the deviation of the focal point of light of different wavelengths after passing through the optical imaging lenses. Figure 9B The astigmatism curves of the optical imaging lenses of Examples 4, 5, and 6 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 9C The magnification chromatic aberration curves of the optical imaging lenses of Examples 4, 5, and 6 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 9A to 9C It can be seen that the optical imaging lenses given in Examples 4, 5, and 6 can achieve good imaging quality.

[0116] Example 7

[0117] The following is for reference Figure 10 Describes an optical imaging lens according to Embodiment 7 of this application.

[0118] like Figure 10As shown, the optical imaging lens 700 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO can be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0119] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane.

[0120] Table 5 shows the basic parameters of the optical imaging lens of Example 7, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0121]

[0122] Table 5

[0123] In this embodiment, the total effective focal length f of the optical imaging lens is 1.31 mm, the maximum field of view (FOV) of the optical imaging lens is 150.00°, the relative F-number (Fno) of the optical imaging lens satisfies 1.90, the combined focal length f12 of the first lens and the second lens is -14.17 mm, and the combined focal length f23 of the second lens and the third lens is 1.41 mm.

[0124] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 6 shows the higher-order coefficients of the aspherical surfaces S1-S12 that can be used in Embodiment 7. A 4 , A 6 , A 8 , A 10 , A12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0125]

[0126] Table 6

[0127] Example 8

[0128] The following is for reference Figure 11 Describes an optical imaging lens according to Embodiment 8 of this application.

[0129] like Figure 11 As shown, the optical imaging lens 800 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO may be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacer group may also include a third auxiliary spacer P3b disposed on the image-side surface of the third spacer P3 and at least partially in contact with the image-side surface of the third spacer P3. The spacers can block excess light during the imaging process from entering the next lens, while simultaneously allowing the lens to better contact the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0130] The structure of the effective diameter portion of the lens in this embodiment is the same as that of the lens in Embodiment 7. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 5, and the aspherical coefficient table is the same as Table 6. The difference between this embodiment and Embodiment 7 is that the structural dimensions of the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, and the fifth spacer P5 are different. For example, the parameters d1s, D1s, D1m, d2s, D2s, D2m, d4s, d5s, D5s, D5m, d0s, d0m, D0s, D0m, EP01, EP12, EP23, EP34, EP45, and L are different.

[0131] Example 9

[0132] The following is for reference Figure 12 Describes an optical imaging lens according to Embodiment 9 of this application.

[0133] like Figure 12 As shown, the optical imaging lens 900 includes a lens barrel and a six-element lens group and a spacer group disposed within the lens barrel. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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. An aperture stop STO may be disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The spacer group may also include a second auxiliary spacer P2b disposed on the image-side surface of the second spacer P2 and at least partially in contact with the image-side surface of the second spacer P2. The spacers can block excess light during the imaging process from entering the next lens, while simultaneously allowing the lens to better contact the lens barrel, thus enhancing the structural stability of the optical imaging lens.

[0134] The structure of the effective diameter portion of the lens in this embodiment is the same as that of the lens in Embodiment 7. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 5, and the aspherical coefficient table is the same as Table 6. The difference between this embodiment and Embodiment 7 is that the structural dimensions of the lens barrel, the first spacer P1, the second spacer P2, the third spacer P3, the fourth spacer P4, and the fifth spacer P5 are different. For example, the parameters d1s, D1s, D1m, d2s, D2s, D2m, d4s, d5s, D5s, D5m, d0s, d0m, D0s, D0m, EP01, EP12, EP23, EP34, EP45, and L are different.

[0135] Figure 13A The on-axis chromatic aberration curves of the optical imaging lenses of embodiments 7, 8, and 9 are shown, which represent the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 13B The astigmatism curves of the optical imaging lenses of Examples 7, 8, and 9 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 13C The magnification chromatic aberration curves of the optical imaging lenses of Examples 7, 8, and 9 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 13A to 13C It can be seen that the optical imaging lenses given in Examples 7, 8, and 9 can achieve good imaging quality.

[0136] Table 7 shows the values ​​of parameters d1s, D1s, D1m, d2s, D2s, D2m, d4s, d5s, D5s, D5m, d0s, d0m, D0s, D0m, EP01, EP12, EP23, EP34, EP45, and L for each embodiment in Examples 1-9. These parameters can be measured according to the annotation method shown in Figure 1, and the units for all parameters listed in Table 7 are in mm.

[0137]

[0138] Table 7

[0139] Table 8 shows the values ​​of the conditional expressions for each of the embodiments in Examples 1-9.

[0140]

[0141] Table 8

[0142] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an image acquisition module integrated into a mobile electronic device such as a mobile phone or VR. The imaging device is equipped with the optical imaging lens described above.

[0143] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that, include: A six-element lens group includes a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power, arranged sequentially along the optical axis from the object side to the image side. The image-side surface of the first lens is concave; the object-side surface of the second lens is concave, and the image-side surface is convex; the object-side surface and the image-side surface of the third lens are both convex; the object-side surface of the fourth lens is convex, and the image-side surface is concave; the object-side surface and the image-side surface of the fifth lens are both convex; and the object-side surface of the sixth lens is convex, and the image-side surface is concave. A spacer assembly includes a fifth spacer that is positioned on the image-side surface of the fifth lens and in contact with the image-side surface of the fifth lens; The lens barrel, the six-element lens group and the spacer group are placed in the lens barrel; The optical imaging lens contains six lenses with optical power. The maximum field of view (FOV) of the optical imaging lens satisfies: 100.00° ≤ FOV ≤ 150.00°; The effective focal length f6 of the sixth lens and the outer diameter D5m of the image-side surface of the fifth spacer satisfy: 1.40 < |f6 / D5m| ≤ 2.25; and The outer diameter D0s of the object-side end face of the lens barrel, the outer diameter D0m of the image-side end face of the lens barrel, the radius of curvature R11 of the object-side surface of the sixth lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: 2.28≤(D0s-D0m) / (R11-R12)≤9.

52.

2. The optical imaging lens according to claim 1, characterized in that, The spacer assembly further includes a first spacer disposed on and in contact with the image-side surface of the first lens. Wherein, the inner diameter d0s of the object-side end face of the lens barrel, the inner diameter d0m of the image-side end face of the lens barrel, and the total effective focal length f of the optical imaging lens satisfy: 2.20≤(d0s-d0m) / f≤4.89; the inner diameter d1s of the object-side surface of the first spacer, the outer diameter D1s of the object-side surface of the first spacer, and the effective focal length f1 of the first lens satisfy: -2.71≤(D1s-d1s) / f1<-0.

70.

3. The optical imaging lens according to claim 2, characterized in that, The outer diameter D1s of the object side of the first spacer, the effective focal length f1 of the first lens, the outer diameter D5s of the object side of the fifth spacer, and the effective focal length f5 of the fifth lens satisfy: 0 < |D1s / f1| - |D5s / f5| < 2.

15.

4. The optical imaging lens according to claim 2, characterized in that, The spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens. Wherein, the inner diameter d1s of the object side of the first spacer, the outer diameter D1s of the object side of the first spacer, the spacing EP12 of the first spacer and the second spacer along the optical axis and the relative F number Fno of the optical imaging lens satisfy: 1.8 < (D1s-d1s) / EP12×Fno < 9.

00.

5. The optical imaging lens according to claim 2, characterized in that, The spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens. Wherein, the spacing EP12 between the first spacer and the second spacer along the optical axis, the combined focal length f12 of the first lens and the second lens, and the Abbe number V1 of the first lens and the Abbe number V2 of the second lens satisfy: -3.80 < (V1-V2)×EP12 / f12 ≤ -2.

36.

6. The optical imaging lens according to claim 2, characterized in that, The spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens. Wherein, the distance EP01 between the object-side end face of the lens barrel and the first spacer along the optical axis and the distance EP12 between the first spacer and the second spacer along the optical axis satisfy: 1.09≤EP01 / EP12<2.

20.

7. The optical imaging lens according to claim 2, characterized in that, The spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens. Wherein, the inner diameter d1s of the object side of the first spacer, the outer diameter D2s of the object side of the second spacer, the air gap T12 between the first lens and the second lens on the optical axis and the center thickness CT2 of the second lens on the optical axis satisfy: 3.10 < d1s / T12 × (D2s / CT2) ≤ 5.

75.

8. The optical imaging lens according to claim 2, characterized in that, The spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens. Wherein, the inner diameter d1s of the object side of the first spacer, the outer diameter D2s of the object side of the second spacer, the center thickness CT1 of the first lens on the optical axis and the radius of curvature R2 of the image side of the first lens satisfy: 0.15 < d1s × CT1 / (D2s × R2) < 0.

60.

9. The optical imaging lens according to claim 2, characterized in that, The spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens. Wherein, the combined focal length f12 of the first lens and the second lens, the combined focal length f23 of the second lens and the third lens, the inner diameter d1s of the object side of the first spacer and the inner diameter d2s of the object side of the second spacer satisfy: -9.57≤f12 / d1s+f23 / d2s≤-5.

93.

10. The optical imaging lens according to claim 1, characterized in that, The spacer assembly further includes a second spacer disposed on and in contact with the image-side surface of the second lens, and a third spacer disposed on and in contact with the image-side surface of the third lens. Wherein, the center thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens on the optical axis and the gap EP23 between the second spacer and the third spacer along the optical axis satisfy: 6.00≤(CT1+T12+CT2) / EP23≤14.

14.

11. The optical imaging lens according to claim 1, characterized in that, The spacer assembly further includes a third spacer disposed on and in contact with the image-side surface of the third lens, and a fourth spacer disposed on and in contact with the image-side surface of the fourth lens. Wherein, the spacing EP34 between the third spacer and the fourth spacer along the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the inner diameter d4s of the object side of the fourth spacer and the inner diameter d5s of the object side of the fifth spacer satisfy: 0.76≤EP34 / CT4×(d4s / d5s)<2.

60.

12. The optical imaging lens according to claim 11, characterized in that, The spacer assembly further includes a first spacer disposed on and in contact with the image-side surface of the first lens, and a second spacer disposed on and in contact with the image-side surface of the second lens. Wherein, the outer diameter D1m of the image side of the first spacer and the outer diameter D2m of the image side of the second spacer satisfy: 0.90≤D1m / D2m<2.50; the length L of the lens barrel in the direction of the optical axis, the total effective focal length f of the optical imaging lens, the spacing EP34 of the third and fourth spacers along the optical axis and the spacing EP45 of the fourth and fifth spacers along the optical axis satisfy: 5.98≤L / f+EP34 / EP45≤7.

80.

13. The optical imaging lens according to any one of claims 1-12, characterized in that, The outer diameter D0m of the image-side end face of the lens tube and the outer diameter D5s of the object-side end face of the fifth spacer satisfy the following condition: 1.38≤D0m / D5s≤2.14.

Images