Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises, in sequence from the object side to the image side along the optical axis: a first lens with positive refractive power, the object side of which is a convex surface and the image side of which is a convex surface; a second lens with negative refractive power; a third lens with positive refractive power; and a fourth lens with negative refractive power, the object side of which is a concave surface and the image side of which is a convex surface; wherein the second lens can move along the optical axis to perform focusing by moving the second lens when the object distance of the optical imaging lens changes; and in a close-up shooting mode, the air gap T12 of the first lens and the second lens on the optical axis and the air gap T34 of the third lens and the fourth lens on the optical axis satisfy: 0.5 < T34 / T12 < 2.0.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical imaging lens comprising four lenses. Background Technology

[0002] With the development of science and technology, the semiconductor industry has developed rapidly, and the smartphone industry has also experienced rapid growth. Traditional optical imaging lenses focus by using a motor to drive the entire lens back and forth, aligning the image plane of the lens with the photosensitive surface of the chip.

[0003] However, the focusing method of the aforementioned traditional lenses requires a motor to drive the entire lens to move back and forth relative to the sensor for focusing. Therefore, a large motor thrust is required, and the motor size is also large. In addition, a large space needs to be reserved between the lens and the image plane during focusing, which conflicts with the miniaturization design of lenses. Summary of the Invention

[0004] This application provides an optical imaging lens, comprising, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, the object side being convex and the image side being convex; a second lens with negative optical power; a third lens with positive optical power; and a fourth lens with negative optical power, the object side being concave and the image side being convex; wherein the second lens is movable along the optical axis to perform focusing by moving the second lens when the object distance of the optical imaging lens changes; and in close-range shooting mode, the air gap T12 between the first and second lenses on the optical axis and the air gap T34 between the third and fourth lenses on the optical axis satisfy: 0.5 < T34 / T12 < 2.0.

[0005] In an exemplary embodiment, the object-side surface of the second lens is concave, and the image-side surface is concave; while the object-side surface of the third lens is concave, and the image-side surface is convex.

[0006] In an exemplary embodiment, in close-up shooting mode, the air gap T23 between the second and third lenses on the optical axis and the air gap T34 between the third and fourth lenses on the optical axis satisfy: 2.0 < T34 / T23 < 5.5.

[0007] In an exemplary embodiment, in close-up shooting mode, the air gap T12 between the first lens and the second lens on the optical axis and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 0.2 < T23 / T12 < 1.0.

[0008] In an exemplary embodiment, in close-up shooting mode, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the refractive index N1 of the first lens, the refractive index N2 of the second lens and the effective focal length f of the optical imaging lens satisfy: -1.1 < (f1*N1 + f2*N2) / f < -0.5.

[0009] In an exemplary embodiment, in close-up shooting mode, the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the first lens, half of the maximum field of view (Semi-FOV) of the optical imaging lens, and the relative F-number Fno of the optical imaging lens satisfy: 10.0 < Fno / TAN(Semi-FOV) + ​​|R2 / R1| < 16.0.

[0010] In an exemplary embodiment, in close-up shooting mode, the radius of curvature R7 of the object side of the fourth lens, the radius of curvature R8 of the image side of the fourth lens, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and the effective focal length f of the optical imaging lens satisfy: 6.5 < |R8 / R7 + TTL / f| < 53.0.

[0011] In an exemplary embodiment, in close-up shooting mode, the air gap T23 between the second and third lenses on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy the following: 0.5 < (T23 + T34) / CT3 < 2.0.

[0012] In an exemplary embodiment, in close-up shooting mode, the radius of curvature R5 of the object side of the third lens, the radius of curvature R6 of the image side of the third lens, and the effective focal length f of the optical imaging lens satisfy: -4.0 < R5 / f + R6 / f ≤ -2.0.

[0013] In an exemplary embodiment, in close-range shooting mode, the radius of curvature R3 of the object side of the second lens, the radius of curvature R4 of the image side of the second lens, and the effective focal length f of the optical imaging lens satisfy: -12.5 < R3 / f + R4 / f < -0.5.

[0014] In an exemplary embodiment, in close-up shooting mode, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, the combined focal length f34 of the third and fourth lenses and the effective focal length f of the optical imaging lens satisfy: 7.0 < ET4 / ET3 + f34 / f < 12.0.

[0015] In an exemplary embodiment, in close-up shooting mode, the air gap T34 between the third lens and the fourth lens on the optical axis, the distance SAG32 between the intersection of the image side surface of the third lens and the optical axis and the effective radius vertex of the image side surface of the third lens, and the distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the effective radius vertex of the object side surface of the fourth lens satisfy the following condition: 0.5 < T34 / |SAG32 + SAG41| < 1.5.

[0016] In an exemplary embodiment, in close-up shooting mode, the air gap T23 between the second lens and the third lens on the optical axis, the distance SAG22 between the intersection of the image-side surface of the second lens and the optical axis and the effective radius vertex of the image-side surface of the second lens, and the distance SAG31 between the intersection of the object-side surface of the third lens and the optical axis and the effective radius vertex of the object-side surface of the third lens satisfy the following condition: 2.5 < T23 / |SAG22+SAG31| < 8.5.

[0017] In an exemplary embodiment, in close-up shooting mode, the optical imaging lens has a center thickness CT1 on the optical axis, an edge thickness ET1 of the first lens, and a distance SAG11 along the optical axis between the intersection of the object side surface of the first lens and the optical axis and the effective radius vertex of the object side surface of the first lens, which satisfies: 4.0 < CT1 / ET1 + CT1 / SAG11 < 4.5.

[0018] In an exemplary embodiment, in close-up shooting mode, the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy: 3.5 < f34 / f12 < 7.0.

[0019] In an exemplary embodiment, in close-up shooting mode, the combined focal length f12 of the first lens and the second lens and the combined focal length f23 of the second lens and the third lens satisfy: 1.0 < f23 / f12 < 3.5.

[0020] Another aspect of this application provides an optical imaging lens, comprising, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, the object side being convex and the image side being convex; a second lens with negative optical power; a third lens with positive optical power; and a fourth lens with negative optical power, the object side being concave and the image side being convex; wherein the second lens is movable along the optical axis to perform focusing by moving the second lens when the object distance of the optical imaging lens changes; and in the telephoto shooting mode, the air gap T12 between the first and second lenses on the optical axis and the air gap T34 between the third and fourth lenses on the optical axis satisfy: 15 < T34 / T12 < 35.

[0021] In an exemplary embodiment, the object-side surface of the second lens is concave, and the image-side surface is concave; while the object-side surface of the third lens is concave, and the image-side surface is convex.

[0022] In an exemplary embodiment, in the telephoto shooting mode, the air gap T23 between the second and third lenses on the optical axis and the air gap T34 between the third and fourth lenses on the optical axis satisfy: 0.4 < T34 / T23 < 1.2.

[0023] In an exemplary embodiment, in the telephoto shooting mode, the air gap T12 between the first lens and the second lens on the optical axis and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 20.0 < T23 / T12 < 40.0.

[0024] In an exemplary embodiment, in the telephoto shooting mode, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the refractive index N1 of the first lens, the refractive index N2 of the second lens and the effective focal length f of the optical imaging lens satisfy: -1.0 < (f1*N1 + f2*N2) / f < -0.4.

[0025] In an exemplary embodiment, in the telephoto shooting mode, the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the first lens, half of the maximum field of view (Semi-FOV) of the optical imaging lens, and the relative F-number Fno of the optical imaging lens satisfy: 8.5 < Fno / TAN(Semi-FOV) + ​​|R2 / R1| < 14.5.

[0026] In an exemplary embodiment, in the telephoto shooting mode, the radius of curvature R7 of the object side of the fourth lens, the radius of curvature R8 of the image side of the fourth lens, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and the effective focal length f of the optical imaging lens satisfy: 6.0 < |R8 / R7 + TTL / f| < 52.5.

[0027] In an exemplary embodiment, in the telephoto shooting mode, the air gap T23 between the second and third lenses on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy: 1.9 < (T23 + T34) / CT3 < 3.0.

[0028] In an exemplary embodiment, in the telephoto shooting mode, the radius of curvature R5 of the object side of the third lens, the radius of curvature R6 of the image side of the third lens, and the effective focal length f of the optical imaging lens satisfy the following: -2.7 < R5 / f + R6 / f ≤ -1.5.

[0029] In an exemplary embodiment, in the telephoto shooting mode, the radius of curvature R3 of the object side of the second lens, the radius of curvature R4 of the image side of the second lens, and the effective focal length f of the optical imaging lens satisfy: -11.0 < R3 / f + R4 / f < -0.4.

[0030] In an exemplary embodiment, in the telephoto shooting mode, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, the combined focal length f34 of the third and fourth lenses and the effective focal length f of the optical imaging lens satisfy: 7.0 < ET4 / ET3 + f34 / f < 11.0.

[0031] In an exemplary embodiment, in telephoto shooting mode, the air gap T34 between the third lens and the fourth lens on the optical axis, the distance SAG32 between the intersection of the image side surface of the third lens and the optical axis and the effective radius vertex of the image side surface of the third lens, and the distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the effective radius vertex of the object side surface of the fourth lens satisfy the following: 0.5 < T34 / |SAG32 + SAG41| < 1.3.

[0032] In an exemplary embodiment, in the telephoto shooting mode, the air gap T23 between the second lens and the third lens on the optical axis, the distance SAG22 between the intersection of the image side surface of the second lens and the optical axis and the effective radius vertex of the image side surface of the second lens, and the distance SAG31 between the intersection of the object side surface of the third lens and the optical axis and the effective radius vertex of the object side surface of the third lens satisfy: 6.0 < T23 / |SAG22+SAG31| < 12.0.

[0033] In an exemplary embodiment, in the telephoto shooting mode, the optical imaging lens has a center thickness CT1 on the optical axis, an edge thickness ET1 of the first lens, and a distance SAG11 along the optical axis between the intersection of the object side surface of the first lens and the optical axis and the effective radius vertex of the object side surface of the first lens, which satisfies: 4.0 < CT1 / ET1 + CT1 / SAG11 < 4.5.

[0034] In an exemplary embodiment, in the telephoto shooting mode, the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy the following condition: 2.5 < f34 / f12 < 6.0.

[0035] In an exemplary embodiment, in the telephoto shooting mode, the combined focal length f12 of the first lens and the second lens and the combined focal length f23 of the second lens and the third lens satisfy the following condition: 0.5 < f23 / f12 < 1.2.

[0036] The optical imaging lens provided in this application includes four lenses. By controlling the movement of the second lens along the optical axis, focusing is achieved by ensuring that the image plane and the photosensitive surface of the chip coincide when the object distance of the optical imaging lens changes. This application, through reasonable allocation of the optical power of each lens, reasonable setting of the surface shape of the first and fourth lenses, and limiting the ratio of the air gap between the third and fourth lenses on the optical axis to the air gap between the first and second lenses on the optical axis, ensures that the second lens can move back and forth for focusing when the object distance changes, and maintains good image quality at different object distances. Furthermore, it shortens the lens travel during focusing and ensures that the total length of the optical imaging lens remains within a certain range, thereby meeting the miniaturization design requirements of the optical imaging lens. Attached Figure Description

[0037] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0038] Figure 1A A schematic diagram of the structure of the optical imaging lens according to Embodiment 1 of this application in the telephoto shooting mode is shown;

[0039] Figure 1B A schematic diagram of the optical imaging lens according to Embodiment 1 of this application in close-range shooting mode is shown; Figures 2A to 2D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 1 in telephoto shooting mode are shown respectively.

[0040] Figures 3A to 3D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 1 in close-range shooting mode are shown respectively.

[0041] Figure 4A A schematic diagram of the structure of the optical imaging lens according to Embodiment 2 of this application in the long-distance shooting mode is shown;

[0042] Figure 4B A schematic diagram of the structure of the optical imaging lens according to Embodiment 2 of this application in close-range shooting mode is shown; Figures 5A to 5D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 2 in long-distance shooting mode are shown respectively.

[0043] Figures 6A to 6D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 2 in close-range shooting mode are shown respectively.

[0044] Figure 7A A schematic diagram of the structure of the optical imaging lens according to Embodiment 3 of this application in the long-distance shooting mode is shown;

[0045] Figure 7B A schematic diagram of the optical imaging lens according to Embodiment 3 of this application in close-range shooting mode is shown; Figures 8A to 8D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 3 in long-distance shooting mode are shown respectively.

[0046] Figures 9A to 9D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 3 in close-range shooting mode are shown respectively.

[0047] Figure 10A A schematic diagram of the structure of the optical imaging lens according to Embodiment 4 of this application in the long-distance shooting mode is shown;

[0048] Figure 10B A schematic diagram of the structure of the optical imaging lens according to Embodiment 4 of this application in close-range shooting mode is shown; Figures 11A to 11D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 4 in long-distance shooting mode are shown respectively.

[0049] Figures 12A to 12D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 4 in close-range shooting mode are shown respectively.

[0050] Figure 13A A schematic diagram of the structure of the optical imaging lens according to Embodiment 5 of this application in the long-distance shooting mode is shown;

[0051] Figure 13B A schematic diagram of the optical imaging lens according to Embodiment 5 of this application in close-range shooting mode is shown; Figures 14A to 14D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 5 in telephoto shooting mode are shown respectively; and

[0052] Figures 15A to 15D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 5 in close-up shooting mode are shown respectively. Detailed Implementation

[0053] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0054] 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.

[0055] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0056] 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.

[0057] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0058] 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 formalized sense, unless expressly so specified herein.

[0059] 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.

[0060] The features, principles and other aspects of this application are described in detail below.

[0061] An optical imaging lens according to an exemplary embodiment of this application may include four lenses with optical power, namely a first lens, a second lens, a third lens, and a fourth lens arranged sequentially along the optical path. These four lenses are arranged sequentially from the object side to the image side along the optical axis. Any two adjacent lenses among the first to fourth lenses may have a gap between them.

[0062] In an exemplary embodiment, the first lens may have positive optical power, and its object-side surface may be convex, as may its image-side surface; the second lens may have negative optical power; the third lens may have positive optical power; and the fourth lens may have negative optical power, and its object-side surface may be concave, as may its image-side surface be convex. By rationally allocating the optical power of each lens and setting the surface shape of each lens, it is beneficial to reduce the on-axis field-of-view aberration of the optical imaging lens, thereby enabling the optical imaging lens to have good on-axis imaging performance.

[0063] In an exemplary embodiment, the optical imaging lens according to this application is an internal focusing lens, and the second lens is movable along the optical axis to perform focusing by moving the second lens when the object distance of the optical imaging lens changes. As the second lens moves along the optical axis, the optical imaging lens according to this application can switch between a close-up shooting mode and a long-distance shooting mode. In the example, the total effective focal length of the optical imaging lens according to this application can achieve zoom adjustment from approximately 2.8mm to approximately 4.5mm.

[0064] In an exemplary embodiment, the object-side surface of the second lens may be concave, and the image-side surface may be concave; the object-side surface of the third lens may be concave, and the image-side surface may be convex. Thus, by controlling the surface shapes of the object-side and image-side surfaces of the second and third lenses, it can be ensured that when focusing is performed by adjusting the position of the second lens after a change in object distance, focusing can proceed smoothly, and good image quality can be achieved in shooting modes with different object distances.

[0065] In an exemplary embodiment, the optical imaging lens according to this application may further include an aperture stop disposed between the object side and the first lens.

[0066] In an exemplary embodiment, the optical imaging lens according to this application may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0067] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: 0.5 < T34 / T12 < 2.0, where T12 is the air gap between the first and second lenses on the optical axis, and T34 is the air gap between the third and fourth lenses on the optical axis. By reasonably controlling the spacing between each lens, it can be ensured that when the object distance of the optical imaging lens changes, its position relative to the imaging plane can be adjusted by moving the second lens along the optical axis to focus the optical imaging lens, and good image quality is guaranteed in different object distance shooting modes. In addition, by controlling the ratio of the air gap between the first and second lenses on the optical axis and the air gap between the third and fourth lenses on the optical axis, the total length of the optical imaging lens can be kept within a certain range, shortening the total length of the optical imaging lens, and ensuring that the lens travel meets the motor's requirements when adjusting the position of the second lens for focusing.

[0068] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: 2.0 < T34 / T23 < 5.5, where T23 is the air gap between the second and third lenses on the optical axis, and T34 is the air gap between the third and fourth lenses on the optical axis. Satisfying 2.0 < T34 / T23 < 5.5 helps control the distance between the second and third lenses within a reasonable range, and in macro shooting mode, the second lens will not collide with the third lens when focusing. Furthermore, the distance between the third and fourth lenses can be controlled to ensure the total length of the optical imaging lens remains within a certain range, thus achieving miniaturization of the optical imaging lens.

[0069] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following condition in close-up shooting mode: 0.2 < T23 / T12 < 1.0, where T12 is the air gap between the first lens and the second lens on the optical axis, and T23 is the air gap between the second lens and the third lens on the optical axis. Satisfying 0.2 < T23 / T12 < 1.0 ensures that, in close-up shooting mode, the second lens will not collide with adjacent lenses when focusing.

[0070] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: -1.1 < (f1*N1 + f2*N2) / f < -0.5, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and f is the effective focal length of the optical imaging lens. Satisfying -1.1 < (f1*N1 + f2*N2) / f < -0.5 is beneficial in close-up shooting mode, resulting in smaller on-axis aberrations of the optical imaging lens, thereby ensuring better image quality in shooting mode.

[0071] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: 10.0 < Fno / TAN(Semi-FOV) + ​​|R2 / R1| < 16.0, where 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, Semi-FOV is half of the maximum field of view of the optical imaging lens, and Fno is the relative F-number of the optical imaging lens. Satisfying 10.0 < Fno / TAN(Semi-FOV) + ​​|R2 / R1| < 16.0 is beneficial for satisfying the characteristics of large-angle shooting in close-up shooting mode, and the relatively large aperture ensures the amount of light entering the image, making the captured image brighter.

[0072] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: 6.5 < |R8 / R7 + TTL / f| < 53.0, where R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, and TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical imaging lens. Satisfying 6.5 < |R8 / R7 + TTL / f| < 53.0 is beneficial for controlling the off-axis aberrations of the optical imaging lens, improving image quality, and controlling the shooting range for close-up shooting.

[0073] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: 0.5 < (T23 + T34) / CT3 < 2.0, where T23 is the air gap between the second and third lenses on the optical axis, T34 is the air gap between the third and fourth lenses on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. Satisfying 0.5 < (T23 + T34) / CT3 < 2.0 allows the gap between the second and third lenses to be controlled within a reasonable range, preventing interference during focusing. Furthermore, by controlling the distance from the center of the third lens to the fourth lens, the overall length of the optical imaging lens can be shortened.

[0074] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-range shooting mode: -4.0 < R5 / f + R6 / f ≤ -2.0, where R5 is the radius of curvature of the object-side surface of the third lens, R6 is the radius of curvature of the image-side surface of the third lens, and f is the effective focal length of the optical imaging lens. Satisfying -4.0 < R5 / f + R6 / f ≤ -2.0 allows control over the surface shape of the third lens, thereby controlling its optical power distribution, reducing the tolerance sensitivity of the optical imaging lens, and improving production yield.

[0075] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-range shooting mode: -12.5 < R3 / f + R4 / f < -0.5, where R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, and f is the effective focal length of the optical imaging lens. Satisfying -12.5 < R3 / f + R4 / f < -0.5 allows control over the surface shape of the second lens, thereby controlling its optical power distribution, reducing the tolerance sensitivity of the optical imaging lens, and improving production yield.

[0076] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-range shooting mode: 7.0 < ET4 / ET3 + f34 / f < 12.0, where ET3 is the edge thickness of the third lens, ET4 is the edge thickness of the fourth lens, f34 is the combined focal length of the third and fourth lenses, and f is the effective focal length of the optical imaging lens. Satisfying 7.0 < ET4 / ET3 + f34 / f < 12.0 allows for control of the edge thicknesses of the third and fourth lenses, ensuring their processing characteristics and preventing deformation during assembly, thus improving production yield. Furthermore, it allows for the reasonable allocation of the optical power of the third and fourth lenses, reducing off-axis aberrations of the optical imaging lens.

[0077] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: 0.5 < T34 / |SAG32+SAG41| < 1.5, where T34 is the air gap between the third and fourth lenses on the optical axis, SAG32 is the distance along the optical axis (also called the on-axis distance) between the intersection of the image-side surface of the third lens and the optical axis and the vertex of the effective radius of the image-side surface of the third lens, and SAG41 is the on-axis distance between the intersection of the object-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object-side surface of the fourth lens. Satisfying 0.5 < T34 / |SAG32+SAG41| < 1.5 allows for control of the shape of the third and fourth lenses, ensuring their processing and forming characteristics, reducing off-axis aberrations of the optical imaging lens, and improving image quality.

[0078] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-range shooting mode: 2.5 < T23 / |SAG22+SAG31| < 8.5, where T23 is the air gap between the second and third lenses on the optical axis, SAG22 is the axial distance between the intersection of the image-side surface of the second lens and the optical axis and the vertex of the effective radius of the image-side surface of the second lens, and SAG31 is the axial distance between the intersection of the object-side surface of the third lens and the optical axis and the vertex of the effective radius of the object-side surface of the third lens. Satisfying 2.5 < T23 / |SAG22+SAG31| < 8.5 allows for control of the shape of the second and third lenses, ensuring their processing and forming characteristics, reducing off-axis aberrations of the optical imaging lens, and improving image quality.

[0079] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following condition in both close-range and long-range shooting modes: 4.0 < CT1 / ET1 + CT1 / SAG11 < 4.5, where CT1 is the center thickness of the first lens on the optical axis, ET1 is the edge thickness of the first lens, and SAG11 is the axial distance between the intersection of the object side of the first lens and the optical axis and the vertex of the effective radius of the object side of the first lens. Satisfying 4.0 < CT1 / ET1 + CT1 / SAG11 < 4.5 allows for control of the optical power of the first lens, reduces the lens tolerance sensitivity of the first lens, and improves manufacturing yield.

[0080] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: 3.5 < f34 / f12 < 7.0, where f12 is the combined focal length of the first and second lenses, and f34 is the combined focal length of the third and fourth lenses. Satisfying 3.5 < f34 / f12 < 7.0 facilitates a reasonable allocation of the optical power distribution of the imaging lens, resulting in better image quality in close-up shooting mode.

[0081] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in close-up shooting mode: 1.0 < f23 / f12 < 3.5, where f23 is the combined focal length of the second and third lenses, and f12 is the combined focal length of the first and second lenses. Satisfying 1.0 < f23 / f12 < 3.5 facilitates the rational allocation of the optical imaging lens's power distribution, resulting in better image quality in close-up shooting mode.

[0082] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: 15 < T34 / T12 < 35, where T12 is the air gap between the first and second lenses on the optical axis, and T34 is the air gap between the third and fourth lenses on the optical axis. By reasonably controlling the spacing between each lens, it can be ensured that when the object distance of the optical imaging lens changes, its position relative to the imaging plane can be adjusted by moving the second lens along the optical axis to focus the optical imaging lens, and good image quality is guaranteed in different object distance shooting modes. In addition, by controlling the ratio of the air gap between the first and second lenses on the optical axis and the air gap between the third and fourth lenses on the optical axis, the total length of the optical imaging lens can be kept within a certain range, shortening the total length of the optical imaging lens, and ensuring that the lens travel meets the motor's requirements when adjusting the position of the second lens for focusing.

[0083] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following condition in long-distance shooting mode: 0.4 < T34 / T23 < 1.2, where T23 is the air gap between the second and third lenses on the optical axis, and T34 is the air gap between the third and fourth lenses on the optical axis. Satisfying 0.4 < T34 / T23 < 1.2 helps control the distance between the second and third lenses within a reasonable range, and in long-distance shooting mode, when moving the second lens for focusing, the distance between the second and third lenses will not be too far; furthermore, the distance between the third and fourth lenses can be controlled, thereby ensuring that the total length of the optical imaging lens remains within a certain range, achieving miniaturization of the optical imaging lens.

[0084] In an exemplary embodiment, the optical imaging lens according to this application can satisfy the following in long-distance shooting mode: 20.0 < T23 / T12 < 40.0, where T12 is the air gap between the first lens and the second lens on the optical axis, and T23 is the air gap between the second lens and the third lens on the optical axis. Satisfying 20.0 < T23 / T12 < 40.0 is beneficial for controlling the gaps between the first lens and the second lens, as well as between the second lens and the third lens, thereby ensuring that the total length of the optical imaging lens is within a certain range.

[0085] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: -1.0 < (f1*N1 + f2*N2) / f < -0.4, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and f is the effective focal length of the optical imaging lens. Satisfying -1.0 < (f1*N1 + f2*N2) / f < -0.4 is beneficial in long-distance shooting mode, resulting in smaller on-axis aberrations of the optical imaging lens, thereby ensuring better image quality in shooting mode.

[0086] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in telephoto shooting mode: 8.5 < Fno / TAN(Semi-FOV) + ​​|R2 / R1| < 14.5, where 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, Semi-FOV is half of the maximum field of view of the optical imaging lens, and Fno is the relative F-number of the optical imaging lens. Satisfying 8.5 < Fno / TAN(Semi-FOV) + ​​|R2 / R1| < 14.5 is beneficial for meeting the characteristics of telephoto shooting in telephoto shooting mode, and the relatively large aperture ensures the amount of light entering the image, making the captured image brighter.

[0087] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: 6.0 < |R8 / R7 + TTL / f| < 52.5, where R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, and TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical imaging lens. Satisfying 6.0 < |R8 / R7 + TTL / f| < 52.5 is beneficial for controlling the off-axis aberrations of the optical imaging lens, improving image quality, and controlling the total length of the optical imaging lens.

[0088] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: 1.9 < (T23 + T34) / CT3 < 3.0, where T23 is the air gap between the second and third lenses on the optical axis, T34 is the air gap between the third and fourth lenses on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. Satisfying 1.9 < (T23 + T34) / CT3 < 3.0 allows the gap between the second and third lenses to be controlled within a reasonable range, preventing interference during focusing. Furthermore, by controlling the distance from the center of the third lens to the fourth lens, the overall length of the optical imaging lens can be shortened, ensuring the molding and processing characteristics of the third lens.

[0089] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: -2.7 < R5 / f + R6 / f ≤ -1.5, where R5 is the radius of curvature of the object-side surface of the third lens, R6 is the radius of curvature of the image-side surface of the third lens, and f is the effective focal length of the optical imaging lens. Satisfying -2.7 < R5 / f + R6 / f ≤ -1.5 allows control over the surface shape of the third lens, thereby controlling its optical power distribution, reducing the tolerance sensitivity of the optical imaging lens, and improving production yield.

[0090] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: -11.0 < R3 / f + R4 / f < -0.4, where R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, and f is the effective focal length of the optical imaging lens. Satisfying -11.0 < R3 / f + R4 / f < -0.4 allows control over the surface shape of the second lens, thereby controlling its optical power distribution, reducing the tolerance sensitivity of the optical imaging lens, and improving production yield.

[0091] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: 7.0 < ET4 / ET3 + f34 / f < 11.0, where ET3 is the edge thickness of the third lens, ET4 is the edge thickness of the fourth lens, f34 is the combined focal length of the third and fourth lenses, and f is the effective focal length of the optical imaging lens. Satisfying 7.0 < ET4 / ET3 + f34 / f < 11.0 allows for control of the edge thicknesses of the third and fourth lenses, ensuring their processing characteristics and preventing deformation during assembly, thus improving production yield. Furthermore, it allows for reasonable allocation of the optical power of the third and fourth lenses, reducing off-axis aberrations of the optical imaging lens.

[0092] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: 0.5 < T34 / |SAG32+SAG41| < 1.3, where T34 is the air gap between the third lens and the fourth lens on the optical axis, SAG32 is the axial distance between the intersection of the image-side surface of the third lens and the optical axis and the vertex of the effective radius of the image-side surface of the third lens, and SAG41 is the axial distance between the intersection of the object-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object-side surface of the fourth lens. Satisfying 0.5 < T34 / |SAG32+SAG41| < 1.3 allows for control of the shape of the third and fourth lenses, ensuring their processing and forming characteristics, reducing off-axis aberrations of the optical imaging lens, and improving image quality.

[0093] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following condition in long-distance shooting mode: 6.0 < T23 / |SAG22+SAG31| < 12.0, where T23 is the air gap between the second lens and the third lens on the optical axis, SAG22 is the axial distance between the intersection of the image-side surface of the second lens and the optical axis and the vertex of the effective radius of the image-side surface of the second lens, and SAG31 is the axial distance between the intersection of the object-side surface of the third lens and the optical axis and the vertex of the effective radius of the object-side surface of the third lens. Satisfying 6.0 < T23 / |SAG22+SAG31| < 12.0 allows for control of the shape of the second and third lenses, ensuring their processing and forming characteristics, and can reduce the off-axis aberration of the optical imaging lens, thereby improving image quality.

[0094] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: 2.5 < f34 / f12 < 6.0, where f12 is the combined focal length of the first and second lenses, and f34 is the combined focal length of the third and fourth lenses. Satisfying 2.5 < f34 / f12 < 6.0 facilitates a reasonable allocation of the optical power distribution of the imaging lens, resulting in better image quality in long-distance shooting mode.

[0095] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following in long-distance shooting mode: 0.5 < f23 / f12 < 1.2, where f23 is the combined focal length of the second and third lenses, and f12 is the combined focal length of the first and second lenses. Satisfying 0.5 < f23 / f12 < 1.2 facilitates the rational allocation of the optical imaging lens's power distribution, resulting in better image quality in long-distance shooting mode.

[0096] In embodiments of this application, at least one of the mirror surfaces of the first to fourth lenses is an aspherical mirror 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 each of the first to fourth lenses are aspherical mirror surfaces.

[0097] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although four lenses are described as an example in the embodiments, the optical imaging lens is not limited to including four lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0098] Embodiments 1 to 5 of an optical imaging lens applicable to the above exemplary embodiments are further described below with reference to the accompanying drawings.

[0099] Example 1

[0100] The following is for reference Figures 1A to 3D Describes an optical imaging lens according to Embodiment 1 of this application. Figure 1A A schematic diagram of the optical imaging lens according to Embodiment 1 of this application in telephoto shooting mode is shown. Figure 1B A schematic diagram of the structure of the optical imaging lens according to Embodiment 1 of this application in close-up shooting mode is shown.

[0101] like Figure 1A and Figure 1B As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and imaging surface S11.

[0102] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The filter E5 has an object-side surface S9 and an image-side surface S10. Light from the object passes sequentially through each surface S1 to S10 and is finally imaged on the imaging surface S11.

[0103] Table 1 shows the basic parameters of the optical imaging lens of Example 1, where the units for radius of curvature and thickness are millimeters (mm).

[0104]

[0105] Table 1

[0106] In this embodiment, when the subject moves closer to the optical imaging lens from a distance, the second lens moves relative to the imaging surface to perform the focusing function. That is, by changing the distance of the second lens E2 relative to the imaging surface S11 on the optical axis, the focal length of the optical imaging lens can be changed with the distance from the subject, thereby realizing the autofocus function of the optical imaging lens.

[0107] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the fourth lens E4 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0108]

[0109] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A1, A2, A3, A4, A5, A6, A8, A1, A1, A2, A3, A4, A5, A6, A1, A2, A3, A4, A5, A6, A7, A8, A1, A1, A1, A1, A2, A1 ... 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0110]

[0111]

[0112] Table 2-1

[0113] Face number A18 A20 A22 A24 A26 A28 A30 S1 2.3689E-05 2.5220E-06 2.2382E-05 1.1795E-05 1.5166E-05 7.7263E-06 1.0796E-05 S2 -8.2097E-06 -4.2718E-06 -1.1772E-05 6.7294E-07 5.9309E-06 9.0101E-06 -6.0284E-06 S3 2.8056E-07 2.0768E-05 4.4227E-06 1.7822E-05 7.3240E-06 5.0581E-06 -9.0544E-06 S4 1.3207E-05 -1.6779E-05 -7.3348E-07 -1.1689E-05 -1.3259E-06 -2.0596E-06 1.2726E-06 S5 -4.0048E-06 -2.4493E-05 1.5429E-05 1.7351E-06 1.9524E-05 1.2859E-08 -1.4616E-05 S6 6.7076E-05 1.7228E-05 -2.9712E-06 1.9142E-05 -7.1917E-06 -2.2043E-05 -1.2841E-05 S7 -2.4114E-04 5.3649E-04 -3.5126E-04 1.9052E-04 -2.6918E-04 -1.8826E-05 2.2288E-05 S8 -1.0065E-03 1.0995E-03 -4.8694E-04 8.7880E-04 -4.4603E-04 2.9504E-04 -1.0405E-04

[0114] Table 2-2

[0115] Table 3 shows the parameter settings of an optical imaging lens according to an example of this application in both long-distance and close-range shooting modes.

[0116] In this example, the focal length of the first lens of the optical imaging lens is f1 = 2.56mm, the focal length of the second lens is f2 = -3.39mm, the focal length of the third lens is f3 = 3.36mm, and the focal length of the fourth lens is f4 = -2.86mm. The effective focal length of the optical imaging lens in telephoto shooting mode is f = 4.20mm, and the effective focal length in close-up shooting mode is f = 2.90mm.

[0117] state Long distance Close range OBJ 3000.0000 13.0000 TTL 4.99 5.00 Fno 2.43 2.73 Semi-FOV 24.82 20.52 f 4.20 2.90 T12 0.03 0.80 T23 0.96 0.19 ET1 0.35 0.34 ET3 0.37 0.51 ET4 0.69 0.64 SAG11 0.24 0.26 SAG22 0.10 0.10 SAG31 0.04 -0.02 SAG32 -0.32 -0.25 SAG41 -0.56 -0.46 f12 6.21 4.00 f23 7.01 13.29 f34 21.67 21.67

[0118] Table 3

[0119] Figure 2A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 in telephoto shooting mode is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Embodiment 1 in telephoto shooting mode is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C The distortion curve of the optical imaging lens of Embodiment 1 in long-distance shooting mode is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 2D The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens.

[0120] Figure 3A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 in close-up shooting mode is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 3B The astigmatism curve of the optical imaging lens of Embodiment 1 in close-up shooting mode is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 3C The distortion curve of the optical imaging lens of Embodiment 1 in close-range shooting mode is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 3D The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens.

[0121] according to Figures 2A to 2D ,as well as Figures 3A to 3D It can be seen that the optical imaging lens given in Example 1 can achieve good imaging quality in both long-distance and close-distance shooting modes.

[0122] Example 2

[0123] The following is for reference Figures 4A to 6D This paper describes an optical imaging lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figure 4A This diagram illustrates the structure of the optical imaging lens according to Embodiment 2 of this application in telephoto shooting mode. Figure 4B A schematic diagram of the structure of the optical imaging lens according to Embodiment 2 of this application in close-up shooting mode is shown.

[0124] like Figure 4A and Figure 4B As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and imaging surface S11.

[0125] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex.

[0126] Table 4 shows the basic parameters of the optical imaging lens of Example 2, where the units for radius of curvature and thickness are millimeters (mm).

[0127]

[0128]

[0129] Table 4

[0130] In this embodiment, as the subject moves closer to the optical imaging lens, the second lens moves relative to the imaging surface to perform focusing, so that the focal length of the optical imaging lens changes with the distance from the subject, thereby realizing the autofocus function of the optical imaging lens.

[0131] In Example 2, the object side and image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Tables 5-1 and 5-2 give the higher-order coefficients that can be used for each aspherical mirror S1-S8 in Example 2. The surface shape of each aspherical lens can be defined by the aspherical formula (1) in Example 1 above.

[0132] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.6745E-03 3.1749E-03 5.3844E-04 9.5388E-05 -5.4492E-05 -1.6486E-05 -3.0416E-05 S2 3.5537E-02 3.6518E-03 9.9449E-04 3.5301E-05 7.1632E-05 -3.9550E-05 3.5130E-06 S3 1.3180E-02 -6.2810E-04 1.6969E-04 -6.0394E-05 4.9311E-05 2.5794E-06 4.4089E-05 S4 9.4782E-03 -1.3106E-05 -1.2054E-04 4.8722E-05 -2.3644E-05 1.2378E-05 -6.9218E-06 S5 9.5008E-02 2.1552E-02 5.2385E-04 3.9796E-04 -1.4886E-04 5.1240E-05 -2.4855E-05 S6 2.1368E-01 2.9886E-02 7.3998E-03 1.9831E-03 7.8939E-04 1.6272E-04 6.2984E-05 S7 1.4898E-01 -4.8575E-02 9.0573E-03 -3.6374E-04 1.5984E-03 1.3873E-05 1.4418E-04 S8 -1.1680E-02 -9.7481E-02 1.8737E-02 -5.0652E-03 3.2134E-03 -7.5967E-04 5.6851E-04

[0133] Table 5-1

[0134] Face number A18 A20 A22 A24 A26 A28 A30 S1 -6.3462E-06 -7.5610E-06 7.5156E-06 6.1521E-06 1.0594E-05 3.9385E-06 2.5920E-06 S2 -5.1212E-05 -3.6537E-05 -6.5418E-05 -5.1140E-05 -4.8880E-05 -2.3174E-05 -1.4811E-05 S3 2.0810E-05 3.6976E-05 1.6172E-05 1.3231E-05 -2.0856E-06 6.8200E-07 -1.7853E-06 S4 2.6253E-06 -3.5962E-06 -2.4267E-07 -2.2794E-06 4.2872E-07 5.3505E-07 9.6180E-07 S5 4.6842E-05 -1.0716E-05 1.6080E-05 -1.0898E-05 7.9445E-06 -4.2355E-06 4.2943E-06 S6 -3.2644E-05 -2.6138E-05 -4.1489E-05 -1.0949E-05 -1.8449E-05 9.5005E-07 -7.0011E-06 S7 -8.8854E-05 -3.0329E-05 -3.1420E-05 8.8409E-07 -2.8698E-05 -9.9052E-06 -3.6516E-06 S8 -1.9131E-04 7.3293E-05 -5.8510E-05 2.1346E-05 -3.6682E-05 2.0314E-05 -2.4088E-05

[0135] Table 5-2

[0136] Table 6 shows the parameter settings of an optical imaging lens according to an example of this application in both long-distance and close-range shooting modes.

[0137] In this example, the focal length of the first lens of the optical imaging lens is f1 = 2.97mm, the focal length of the second lens is f2 = -5.03mm, the focal length of the third lens is f3 = 3.29mm, and the focal length of the fourth lens is f4 = -2.83mm. The effective focal length of the optical imaging lens in telephoto shooting mode is f = 4.09mm, and the effective focal length in close-up shooting mode is f = 3.59mm.

[0138]

[0139]

[0140] Table 6

[0141] Figures 5A to 5D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 2 in telephoto shooting mode are shown respectively.

[0142] Figures 6A to 6D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 2 in close-up shooting mode are shown respectively.

[0143] according to Figures 5A to 5D ,as well as Figures 6A to 6D It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality in both long-distance and close-distance shooting modes.

[0144] Example 3

[0145] The following is for reference Figures 7A to 9D Describes an optical imaging lens according to Embodiment 3 of this application. Figure 7A This diagram illustrates the structure of the optical imaging lens according to Embodiment 3 of this application in telephoto shooting mode. Figure 7B A schematic diagram of the optical imaging lens according to Embodiment 3 of this application in close-up shooting mode is shown.

[0146] like Figure 7A and Figure 7BAs shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and imaging surface S11.

[0147] In this embodiment, as the subject moves closer to the optical imaging lens, the second lens moves relative to the imaging surface to perform focusing, so that the focal length of the optical imaging lens changes with the distance from the subject, thereby realizing the autofocus function of the optical imaging lens.

[0148] Table 7 shows the basic parameters of the optical imaging lens of Example 3, where the units for radius of curvature and thickness are millimeters (mm).

[0149]

[0150]

[0151] Table 7

[0152] In Example 3, the object-side surface and image-side surface of any one of the first lens E1 to the fourth lens E4 are aspherical. Tables 8-1 and 8-2 give the higher-order coefficients that can be used for each aspherical mirror S1-S8 in Example 3, wherein the surface shape of each aspherical lens can be defined using the aspherical formula (1) in Example 1 above.

[0153] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.5146E-03 2.5066E-03 6.1423E-04 1.2923E-04 3.2072E-05 -5.0756E-07 -1.6771E-06 S2 3.9185E-02 3.5871E-03 9.9434E-04 1.3193E-04 7.8257E-05 -3.9778E-05 1.9402E-05 S3 1.3382E-02 -6.9757E-04 1.0112E-04 -3.8751E-05 2.6835E-05 -3.4176E-05 1.5738E-05 S4 9.4100E-03 -1.6321E-04 -1.2858E-04 3.5962E-05 -1.7626E-05 8.8262E-06 -4.3243E-06 S5 9.9119E-02 2.1185E-02 9.7639E-04 3.0483E-04 -9.4335E-05 2.1461E-06 -5.7813E-06 S6 2.3968E-01 3.3892E-02 8.2975E-03 2.1837E-03 6.5840E-04 1.7222E-04 6.0749E-05 S7 2.3475E-01 -7.2835E-02 1.7004E-02 -2.5516E-03 1.6917E-03 -2.1883E-04 1.7708E-04 S8 1.1888E-01 -1.0784E-01 3.0846E-02 -7.8491E-03 3.3311E-03 -8.5660E-04 4.4292E-04

[0154] Table 8-1

[0155] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.2963E-06 -2.0978E-07 4.4184E-06 5.3476E-06 7.6737E-07 -2.4532E-06 -3.6243E-06 S2 -2.1923E-05 -7.4767E-07 -2.0570E-06 8.7701E-06 3.4133E-06 2.3789E-06 -6.5113E-06 S3 -1.0718E-05 -2.6284E-06 -7.2904E-06 -1.8654E-06 1.7186E-06 8.5504E-06 1.8034E-06 S4 5.9950E-06 4.6940E-07 2.3973E-06 -1.3211E-06 -1.2367E-06 -1.9003E-07 1.7084E-07 S5 1.3380E-07 -1.6212E-05 8.6937E-06 -4.5042E-06 2.4537E-07 -9.6638E-07 4.4764E-07 S6 1.7767E-05 5.1469E-06 -1.5399E-05 -3.7194E-06 -4.7661E-06 -1.7126E-06 -8.8316E-06 S7 -1.0555E-04 4.4529E-05 -2.1235E-05 1.8995E-05 -4.0466E-05 9.6436E-06 7.8677E-07 S8 -2.1014E-04 1.0720E-04 -4.5399E-05 4.0851E-05 -6.8125E-05 3.7983E-05 -1.3981E-05

[0156] Table 8-2

[0157] Table 9 shows the parameter settings for an optical imaging lens according to an example of this application in both long-distance and close-range shooting modes.

[0158] In this example, the focal length of the first lens of the optical imaging lens is f1 = 2.72mm, the focal length of the second lens is f2 = -3.94mm, the focal length of the third lens is f3 = 3.18mm, and the focal length of the fourth lens is f4 = -2.73mm. The effective focal length of the optical imaging lens in telephoto shooting mode is f = 4.20mm, and the effective focal length in close-up shooting mode is f = 3.09mm.

[0159] state Long distance Close range OBJ 3000.0000 15.0000 TTL 4.99 5.00 Fno 2.43 2.73 Semi-FOV 24.48 20.78 f 4.20 3.09 T12 0.03 0.81 T23 1.00 0.22 ET1 0.35 0.35 ET3 0.36 0.47 ET4 0.71 0.67 SAG11 0.25 0.26 SAG22 0.10 0.10 SAG31 0.00 -0.04 SAG32 -0.35 -0.28 SAG41 -0.55 -0.46 f12 5.86 4.10 f23 5.22 7.73 f34 26.13 26.13

[0160] Table 9

[0161] Figures 8A to 8DThe on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 3 in long-distance shooting mode are shown respectively.

[0162] Figures 9A to 9D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 3 in close-up shooting mode are shown respectively.

[0163] according to Figures 8A to 8D ,as well as Figures 9A to 9D It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality in both long-distance and close-distance shooting modes.

[0164] Example 4

[0165] The following is for reference Figures 10A to 12D An optical imaging lens according to Embodiment 4 of this application is described. Figure 10A A schematic diagram of the optical imaging lens according to Embodiment 4 of this application in telephoto shooting mode is shown. Figure 10B A schematic diagram of the optical imaging lens according to Embodiment 4 of this application in close-up shooting mode is shown.

[0166] like Figure 10A and Figure 10B As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and imaging surface S11.

[0167] In this embodiment, as the subject moves closer to the optical imaging lens, the second lens moves relative to the imaging surface to perform focusing, so that the focal length of the optical imaging lens changes with the distance from the subject, thereby realizing the autofocus function of the optical imaging lens.

[0168] Table 10 shows the basic parameters of the optical imaging lens of Example 4, where the units for radius of curvature and thickness are millimeters (mm).

[0169]

[0170] Table 10

[0171] In Example 4, the object side and image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Tables 11-1 and 11-2 give the higher-order coefficients that can be used for each aspherical mirror S1-S8 in Example 4. The surface shape of each aspherical lens can be defined by the aspherical formula (1) in Example 1 above.

[0172] Face number A4 A6 A8 A10 A12 A14 A16 S1 -8.3234E-04 2.7104E-03 5.0550E-04 9.8299E-05 -5.6890E-05 -3.2956E-05 -4.7577E-05 S2 4.9236E-02 4.9570E-03 1.1499E-03 1.4746E-04 5.3321E-05 -2.9174E-05 -2.1984E-06 S3 1.7113E-02 -6.6811E-04 9.1617E-05 1.0267E-05 1.8127E-05 -1.1176E-05 -8.6230E-06 S4 2.6635E-02 -1.0045E-03 -1.1687E-04 8.7751E-05 -6.2158E-06 3.5675E-05 3.8972E-06 S5 6.7186E-02 1.5109E-02 2.6256E-03 1.5159E-03 -1.1383E-06 -5.3492E-05 0.0000E+00 S6 3.2764E-01 4.2850E-02 1.6542E-02 6.3452E-03 2.5535E-03 8.5939E-04 4.2054E-04 S7 4.5499E-01 2.4976E-02 3.4029E-02 1.3365E-02 7.1839E-03 3.4824E-03 1.8153E-03 S8 6.4075E-02 -8.9269E-02 1.7313E-02 -1.8929E-03 1.3931E-03 -4.9720E-05 1.2881E-04

[0173] Table 11-1

[0174] Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.1077E-05 -2.4621E-05 -1.2832E-05 -1.2020E-05 -5.4375E-06 -4.8942E-06 1.8814E-06 S2 -1.3315E-05 6.9206E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.3562E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.1815E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.1644E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 8.3115E-04 3.3248E-04 5.1593E-05 6.8747E-05 2.7027E-04 1.0528E-03 1.2984E-03 S8 1.2627E-05 4.2231E-05 -7.8028E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0175] Table 11-2

[0176] Table 12 shows the parameter settings of an optical imaging lens according to an example of this application in both long-distance and close-range shooting modes.

[0177] In this example, the focal length of the first lens of the optical imaging lens is f1, which is 2.83mm; the focal length of the second lens is f2, which is -4.26mm; the focal length of the third lens is f3, which is 2.85mm; and the focal length of the fourth lens is f4, which is -2.77mm. The effective focal length of the optical imaging lens in telephoto shooting mode is f4.36mm, and the effective focal length in close-up shooting mode is f3.35mm.

[0178] state Long distance Close range OBJ 3000.0000 15.2631 TTL 5.55 5.56 Fno 2.30 2.73 Semi-FOV 24.10 20.26 f 4.36 3.35 T12 0.03 0.86 T23 1.04 0.21 ET1 0.34 0.36 ET3 0.35 0.49 ET4 1.40 1.33 SAG11 0.27 0.24 SAG22 0.11 0.11 SAG31 -0.02 -0.04 SAG32 -0.48 -0.36 SAG41 -0.53 -0.43 f12 6.15 4.32 f23 3.80 5.13 f34 15.80 15.80

[0179] Table 12

[0180] Figures 11A to 11D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 4 in long-distance shooting mode are shown respectively.

[0181] Figures 12A to 12D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 4 in close-up shooting mode are shown respectively.

[0182] according to Figures 11A to 11D ,as well as Figures 12A to 12D It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality in both long-distance and close-distance shooting modes.

[0183] Example 5

[0184] The following is for reference Figures 13A to 15D An optical imaging lens according to Embodiment 5 of this application is described. Figure 13A A schematic diagram of the optical imaging lens according to Embodiment 5 of this application in telephoto shooting mode is shown. Figure 13B A schematic diagram of the structure of the optical imaging lens according to Embodiment 5 of this application in close-up shooting mode is shown.

[0185] like Figure 13A and Figure 13B As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, filter E5, and imaging surface S11.

[0186] In this embodiment, as the subject moves closer to the optical imaging lens, the second lens moves relative to the imaging surface to perform focusing, so that the focal length of the optical imaging lens changes with the distance from the subject, thereby realizing the autofocus function of the optical imaging lens.

[0187] Table 13 shows the basic parameters of the optical imaging lens of Example 5, where the units for radius of curvature and thickness are millimeters (mm).

[0188]

[0189] Table 13

[0190] In Example 5, the object-side surface and image-side surface of any one of the first lens E1 to the fourth lens E4 are aspherical. Tables 14-1 and 14-2 give the higher-order coefficients that can be used for each aspherical mirror S1-S8 in Example 5, wherein the surface shape of each aspherical lens can be defined using the aspherical formula (1) in Example 1 above.

[0191] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.8751E-04 4.0914E-03 9.8152E-04 2.7783E-04 3.8603E-05 3.0699E-05 -3.4879E-06 S2 6.5441E-02 7.4536E-03 1.9979E-03 5.7993E-04 3.4873E-04 2.3346E-04 2.0888E-04 S3 2.7665E-02 -1.8025E-03 6.9160E-05 5.2704E-05 1.3632E-04 1.4478E-04 1.1512E-04 S4 3.1691E-02 -2.9409E-03 -3.8171E-04 -5.2859E-05 -4.8238E-05 1.9827E-06 -1.9814E-05 S5 6.7696E-02 3.3608E-03 -2.5716E-04 4.1069E-04 4.0457E-06 1.4418E-05 0.0000E+00 S6 3.5566E-01 2.9128E-02 1.3052E-02 4.1494E-03 1.5286E-03 5.8628E-04 2.3284E-04 S7 1.9278E-01 -2.9649E-02 6.5642E-03 4.2472E-04 6.8795E-04 2.2055E-04 1.3911E-04 S8 -5.4945E-02 -6.3248E-02 1.1238E-02 -2.0955E-03 9.7772E-04 -3.5345E-04 -7.6642E-05

[0192] Table 14-1

[0193]

[0194]

[0195] Table 14-2

[0196] Table 15 shows the parameter settings for an optical imaging lens according to an example of this application in both long-distance and close-range shooting modes.

[0197] In this example, the focal length of the first lens of the optical imaging lens is f1, which is 3.04 mm; the focal length of the second lens is f2, which is -4.73 mm; the focal length of the third lens is f3, which is 2.85 mm; and the focal length of the fourth lens is f4, which is -2.64 mm. The effective focal length of the optical imaging lens in telephoto shooting mode is f4.89 mm, and the effective focal length in close-up shooting mode is f3.70 mm.

[0198] state Long distance Close range OBJ 3000.0000 16.8089 TTL 6.27 6.27 Fno 2.20 2.73 Semi-FOV 21.61 18.59 f 4.89 3.70 T12 0.03 0.92 T23 1.13 0.25 ET1 0.35 0.42 ET3 0.41 0.51 ET4 2.08 2.04 SAG11 0.35 0.27 SAG22 0.14 0.13 SAG31 -0.03 -0.04 SAG32 -0.47 -0.38 SAG41 -0.42 -0.36 f12 6.31 4.54 f23 3.58 4.68 f34 28.68 28.68

[0199] Table 15

[0200] Figures 14A to 14D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 5 in long-distance shooting mode are shown respectively.

[0201] Figures 15A to 15DThe on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 5 in close-up shooting mode are shown respectively.

[0202] according to Figures 14A to 14D ,as well as Figures 15A to 15D It can be seen that the optical imaging lens given in Example 5 can achieve good imaging quality in both long-distance and close-distance shooting modes.

[0203] In Examples 1 to 5, the optical imaging lens satisfies the conditions in Table 16 and Table 17 in close-up and long-distance shooting modes, respectively.

[0204]

[0205]

[0206] Table 16

[0207] Conditional / Example 1 2 3 4 5 T34 / T12 34.62 27.14 30.42 26.05 17.85 T34 / T23 1.08 1.11 0.99 0.75 0.47 T23 / T12 32.03 24.39 30.71 34.69 37.72 (f1*N1+f2*N2) / f -0.41 -0.94 -0.57 -0.64 -0.66 Fno / TAN(Semi-FOV)+|R2 / R1| 8.96 14.32 10.36 8.63 8.81 |R8 / R7+TTL / f| 52.01 8.00 6.28 10.27 14.40 (T23+T34) / CT3 2.73 2.27 2.80 2.26 1.96 R5 / f+R6 / f -2.62 -1.75 -1.55 -1.84 -1.63 R3 / f+R4 / f -1.23 -10.85 -2.84 -0.48 -0.69 ET4 / ET3+f34 / f 7.01 9.69 8.20 7.66 10.92 T34 / |SAG32+SAG41| 1.19 1.08 1.10 0.77 0.60 T23 / |SAG22+SAG31| 6.86 10.64 10.40 11.66 10.58 CT1 / ET1+CT1 / SAG11 4.33 4.09 4.15 4.23 4.14 f34 / f12 3.49 5.96 4.46 2.57 4.54 f23 / f12 1.13 0.92 0.89 0.62 0.57

[0208] Table 17

[0209] 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, comprises, in order from the object side to the image side along the optical axis: a first lens with positive refractive power, whose object side surface is a convex surface and whose image side surface is a convex surface; a second lens with negative refractive power, whose object side surface is a concave surface and whose image side surface is a concave surface; a third lens with positive refractive power, whose object side surface is a concave surface and whose image side surface is a convex surface; and a fourth lens with negative refractive power, whose object side surface is a concave surface and whose image side surface is a convex surface; wherein the number of lenses with refractive power in the optical imaging lens is four; the positions of the first lens, the third lens and the fourth lens on the optical axis are fixed, and the second lens is movable along the optical axis to perform focusing by moving the second lens when the object distance of the optical imaging lens changes; the optical imaging lens switches between a close-up shooting mode and a long-distance shooting mode as the second lens moves along the optical axis; in the close-up shooting mode of the optical imaging lens, the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy: 3.66≤f34 / f12≤6.94; and the air separation T12 of the first lens and the second lens on the optical axis and the air separation T34 of the third lens and the fourth lens on the optical axis satisfy: 0.91≤T34 / T12<2.

0.

2. The optical imaging lens according to claim 1, wherein, in the close-up shooting mode of the optical imaging lens, the air separation T23 of the second lens and the third lens on the optical axis and the air separation T34 of the third lens and the fourth lens on the optical axis satisfy: 2.28≤T34 / T23≤5.

36.

3. The optical imaging lens according to claim 1, wherein, in the close-up shooting mode of the optical imaging lens, the air separation T12 of the first lens and the second lens on the optical axis and the air separation T23 of the second lens and the third lens on the optical axis satisfy: 0.2<T23 / T12≤0.

88.

4. The optical imaging lens according to claim 1, wherein, in the close-up shooting mode of the optical imaging lens, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the refractive index N1 of the first lens, the refractive index N2 of the second lens and the effective focal length f of the optical imaging lens satisfy: -1.1 < (f1 N1+f2 N2) / f ≤ -0.

60.

5. The optical imaging lens according to claim 1, wherein, in the close-up shooting mode of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, half of the maximum field angle Semi-FOV of the optical imaging lens and the relative F number Fno of the optical imaging lens satisfy: 10.88≤Fno / TAN(Semi-FOV)+|R2 / R1|≤15.

50.

6. The optical imaging lens according to claim 1, wherein, in the close-up shooting mode of the optical imaging lens, the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the effective focal length f of the optical imaging lens satisfy: 6.71≤|R8 / R7+TTL / f|≤52.

55.

7. The optical imaging lens according to claim 1, wherein, in the close-up shooting mode of the optical imaging lens, An air separation T23 of the second lens and the third lens on the optical axis, an air separation T34 of the third lens and the fourth lens on the optical axis, and a central thickness CT3 of the third lens on the optical axis satisfy: 1.23≤(T23+T34) / CT3≤1.

72.

8. The optical imaging lens according to claim 1, wherein, The optical imaging lens in the close-up shooting mode, A radius of curvature R5 of an object side surface of the third lens, a radius of curvature R6 of an image side surface of the third lens, and an effective focal length f of the optical imaging lens satisfy: -3.79≤R5 / f+R6 / f≤-2.

0.

9. The optical imaging lens according to claim 1, wherein, The optical imaging lens in the close-up shooting mode, A radius of curvature R3 of an object side surface of the second lens, a radius of curvature R4 of an image side surface of the second lens, and an effective focal length f of the optical imaging lens satisfy: -12.37≤R3 / f+R4 / f≤-0.

62.

10. The optical imaging lens according to claim 1, wherein, The optical imaging lens in the close-up shooting mode, An edge thickness ET3 of the third lens, an edge thickness ET4 of the fourth lens, a combined focal length f34 of the third lens and the fourth lens, and an effective focal length f of the optical imaging lens satisfy: 7.42≤ET4 / ET3+f34 / f≤10.

64.

11. The optical imaging lens according to claim 1, wherein, The optical imaging lens in the close-up shooting mode, An air separation T34 of the third lens and the fourth lens on the optical axis, a distance SAG32 along the optical axis between an intersection of an image side surface of the third lens and the optical axis to an effective radius vertex of the image side surface of the third lens, and a distance SAG41 along the optical axis between an intersection of an object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens satisfy: 0.99≤T34 / |SAG32+SAG41|<1.

5.

12. The optical imaging lens according to claim 1, wherein, The optical imaging lens in the close-up shooting mode, An air separation T23 of the second lens and the third lens on the optical axis, a distance SAG22 along the optical axis between an intersection of an image side surface of the second lens and the optical axis to an effective radius vertex of the image side surface of the second lens, and a distance SAG31 along the optical axis between an intersection of an object side surface of the third lens and the optical axis to an effective radius vertex of the object side surface of the third lens satisfy: 2.5<T23 / |SAG22+SAG31|<8.

5.

13. The optical imaging lens according to claim 1, wherein, The optical imaging lens in the close-up shooting mode, A central thickness CT1 of the first lens on the optical axis, an edge thickness ET1 of the first lens, and a distance SAG11 along the optical axis between an intersection of an object side surface of the first lens and the optical axis to an effective radius vertex of the object side surface of the first lens satisfy: 4.10≤CT1 / ET1+CT1 / SAG11≤4.

33.

14. The optical imaging lens according to any of claims 1-13, wherein, The optical imaging lens in the close-up shooting mode, A combined focal length f12 of the first lens and the second lens, and a combined focal length f23 of the second lens and the third lens satisfy: 1.19≤f23 / f12≤3.

32.

15. An optical imaging lens characterized in that, comprises, in order from an object side to an image side along an optical axis, a first lens with positive refractive power, a convex object side surface and a convex image side surface; a second lens with negative refractive power, a concave object side surface and a concave image side surface; a third lens with positive refractive power, a concave object side surface and a convex image side surface; and a fourth lens with negative refractive power, a concave object side surface and a convex image side surface; wherein the number of lenses with refractive power in the optical imaging lens is four; the positions of the first lens, the third lens and the fourth lens on the optical axis are fixed, and the second lens is movable along the optical axis to perform focusing by moving the second lens when the object distance of the optical imaging lens changes; the optical imaging lens switches between a close-up shooting mode and a telephoto shooting mode as the second lens moves along the optical axis; in the telephoto shooting mode of the optical imaging lens, the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy: 2.57≤f34 / f12<6.0; and the air separation T12 of the first lens and the second lens on the optical axis and the air separation T34 of the third lens and the fourth lens on the optical axis satisfy: 26.05≤T34 / T12≤34.

62.

16. The optical imaging lens according to claim 15, wherein, in the telephoto shooting mode of the optical imaging lens, the air separation T23 of the second lens and the third lens on the optical axis and the air separation T34 of the third lens and the fourth lens on the optical axis satisfy: 0.75≤T34 / T23≤1.

11.

17. The optical imaging lens according to claim 15, wherein, in the telephoto shooting mode of the optical imaging lens, the air separation T12 of the first lens and the second lens on the optical axis and the air separation T23 of the second lens and the third lens on the optical axis satisfy: 24.39≤T23 / T12≤34.

69.

18. The optical imaging lens according to claim 15, wherein, in the telephoto shooting mode of the optical imaging lens, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the refractive index N1 of the first lens, the refractive index N2 of the second lens and the effective focal length f of the optical imaging lens satisfy: -0.94 < (f1 N1 + f2 N2) / f < -0.

4.

19. The optical imaging lens according to claim 15, wherein, in the telephoto shooting mode of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, half of the maximum field angle Semi-FOV of the optical imaging lens and the relative F number Fno of the optical imaging lens satisfy: 8.63≤Fno / TAN(Semi-FOV)+|R2 / R1|≤14.

32.

20. The optical imaging lens according to claim 15, wherein, in the telephoto shooting mode of the optical imaging lens, the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the effective focal length f of the optical imaging lens satisfy: 6.28≤|R8 / R7+TTL / f|≤52.

01.

21. The optical imaging lens according to claim 15, wherein, in the telephoto shooting mode of the optical imaging lens, The air separation T23 of the second lens and the third lens on the optical axis, the air separation T34 of the third lens and the fourth lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy: 2.26≤(T23+T34) / CT3≤2.

80.

22. The optical imaging lens according to claim 15, wherein, In the tele photographing mode of the optical imaging lens, The radius of curvature R5 of the object side surface of the third lens, the radius of curvature R6 of the image side surface of the third lens, and the effective focal length f of the optical imaging lens satisfy: -2.62≤R5 / f+R6 / f≤-1.

55.

23. The optical imaging lens according to claim 15, wherein, In the tele photographing mode of the optical imaging lens, The radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens, and the effective focal length f of the optical imaging lens satisfy: -10.85≤R3 / f+R4 / f≤-0.

48.

24. The optical imaging lens according to claim 15, wherein, In the tele photographing mode of the optical imaging lens, The radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens, and the effective focal length f of the optical imaging lens satisfy: -10.85≤R3 / f+R4 / f≤-0.

48.

25. The optical imaging lens according to claim 15, wherein, In the tele photographing mode of the optical imaging lens, The edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, the combined focal length f34 of the third lens and the fourth lens, and the effective focal length f of the optical imaging lens satisfy: 7.0<ET4 / ET3+f34 / f≤9.

69.

26. The optical imaging lens according to claim 15, wherein, In the tele photographing mode of the optical imaging lens, The air separation T34 of the third lens and the fourth lens on the optical axis, the distance SAG32 along the optical axis between the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens, and the distance SAG41 along the optical axis between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy: 0.77≤T34 / |SAG32+SAG41|≤1.

19.

27. The optical imaging lens according to claim 15, wherein, In the tele photographing mode of the optical imaging lens, The air separation T23 of the second lens and the third lens on the optical axis, the distance SAG22 along the optical axis between the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens, and the distance SAG31 along the optical axis between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens satisfy: 6.86≤T23 / |SAG22+SAG31|≤11.

66.

28. The optical imaging lens according to any of claims 15-27, wherein, In the tele photographing mode of the optical imaging lens, The center thickness CT1 of the first lens on the optical axis, the edge thickness ET1 of the first lens, and the distance SAG11 along the optical axis between the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens satisfy: 4.09≤CT1 / ET1+CT1 / SAG11≤4.

33. In the tele photographing mode of the optical imaging lens, The combined focal length f12 of the first lens and the second lens, and the combined focal length f23 of the second lens and the third lens satisfy: 0.62≤f23 / f12≤1.13.

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