Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a plurality of lenses and a plurality of spacers, the plurality of lenses comprise a first lens, a second lens, a third lens, a fourth lens and a fifth lens, the plurality of spacers comprise a first spacer and a second spacer, and the following conditions are satisfied: 10-degree lt; the method comprises the following steps: carrying out half-FOVlt; 15 degrees; the following conditions are satisfied: 0.5 lt; eP12 / (T12 + T23) lt; 3, 4, 5; the following conditions are satisfied: 49.4 lt; cT3 / CP2lt; 91.8, 91.8; a distance EP12 between the first spacer and the second spacer in the optical axis direction and a center thickness CT2 of the second lens satisfy: 1.4 lt; eP12 / CT2lt, EP12 / CT2lt; and 3.0. The long-focus optical imaging lens solves the problem that an optical imaging lens in the prior art is poor in bearing stability under the condition that the requirement for long focus is met.

Description

Technical Field

[0001] The utility model relates to the technical field of optical imaging, and particularly relates to an optical imaging lens. Background Art

[0002] At present, with the development of the mobile phone field, the photographing ability has gradually become one of the concerns of users, and imaging capabilities such as multi-object distances, full focal lengths, full scenarios, and high image quality have gradually become important selling points of mobile phones. In order to meet the diverse needs of users, the optical imaging lenses applied in mobile phones usually adopt a grouped structure. However, in the current optical imaging lenses with a grouped structure, the thickness ratio of the non-light-transmitting area to the light-transmitting area of some lenses is inappropriate, resulting in a large bending of some lenses, making it difficult to form the lenses and affecting the bearing stability of the lenses.

[0003] That is to say, the optical imaging lens in the prior art has the problem of poor bearing stability. Content of the Utility Model

[0004] The main purpose of the utility model is to provide an optical imaging lens to solve the problem of poor bearing stability of the optical imaging lens in the prior art.

[0005] To achieve the above purpose, according to one aspect of the utility model, an optical imaging lens is provided, which includes a lens barrel, a plurality of lenses and a plurality of spacers. The plurality of lenses and the plurality of spacers are both arranged in the lens barrel. The plurality of lenses include a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side. Each lens has a light-transmitting area and a non-light-transmitting area, and the non-light-transmitting area is located on the outer peripheral side of the light-transmitting area. The plurality of spacers at least include a first spacer and a second spacer. The first spacer is located on the image side of the first lens and contacts the image side surface of the first lens. The second spacer is located on the image side of the second lens and contacts the image side surface of the second lens. The spacer contacts the non-light-transmitting area of the lens. Half of the maximum field angle of view Semi-FOV of the optical imaging lens satisfies: 10° < Semi-FOV < 15°; the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, 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: 0.5 < EP12 / (T12 + T23) < 3.0; the center thickness CT3 of the third lens and the maximum thickness CP2 of the second spacer satisfy: 49.4 < CT3 / CP2 < 91.8; the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction and the center thickness CT2 of the second lens satisfy: 1.4 < EP12 / CT2 < 3.0.

[0006] According to another aspect of the present utility model, an optical imaging lens is further provided, which includes a lens barrel, a plurality of lenses and a plurality of spacers. The plurality of lenses and the plurality of spacers are both arranged in the lens barrel. The plurality of lenses include a first lens with a positive optical power, a second lens with a negative optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, and a fifth lens with an optical power, which are sequentially arranged from the object side to the image side. Each lens has a light-transmitting area and a non-light-transmitting area, and the non-light-transmitting area is located on the outer peripheral side of the light-transmitting area. The plurality of spacers at least include a first spacer and a second spacer. The first spacer is located on the image side of the first lens and contacts the image side surface of the first lens. The second spacer is located on the image side of the second lens and contacts the image side surface of the second lens. The spacer contacts the non-light-transmitting area of the lens. Half of the maximum field angle of the optical imaging lens, Semi-FOV, satisfies: 10° < Semi-FOV < 15°. The spacing distance EP01 between the object-side end surface of the lens barrel and the object-side surface of the first spacer in the optical axis direction, the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, and the central thickness CT3 of the third lens satisfy: 2.0 < (EP01 + EP12) / CT3 < 4.6.

[0007] Further, the spacing distance EP01 between the object-side end surface of the lens barrel and the object-side surface of the first spacer in the optical axis direction, the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, and the central thickness CT3 of the third lens satisfy: 2.0 < (EP01 + EP12) / CT3 < 4.6.

[0008] Further, the effective focal length f2 of the second lens, the curvature radius R3 of the object-side surface of the second lens, and the curvature radius R4 of the image-side surface of the second lens satisfy: 0 < |f2 / (R3 + R4)| < 1.2; the maximum thickness ETB2 of the non-light-transmitting area of the second lens and the central thickness CT2 of the second lens satisfy: 1.2 < ETB2 / CT2 < 3.0.

[0009] Further, the spacing distance EP01 between the object-side end surface of the lens barrel and the object-side surface of the first spacer in the optical axis direction and the central thickness CT1 of the first lens satisfy: 0.7 < EP01 / CT1 < 1.3.

[0010] Further, the effective focal length f2 of the second lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens satisfy: -0.5 < f2 / (f1 + f3) < -0.2; the image-side inner diameter d1m of the first spacer and the object-side inner diameter d2s of the second spacer satisfy: 1.0 < d1m / d2s < 1.5.

[0011] Furthermore, the following conditions are satisfied among the central thickness CT1 of the first lens, the air gap T12 between the first lens and the second lens on the optical axis, the central thickness CT3 of the third lens, and the air gap T23 between the second lens and the third lens on the optical axis: 1.0 < (CT1 + T12) / (CT3 + T23) < 1.8; and the following condition is satisfied between the central thickness CT1 of the first lens and the sum ∑CP1 of the maximum thicknesses of all the spacers between the first lens and the second lens: 2.4 < CT1 + ∑CP1 < 3.5.

[0012] Furthermore, the following condition is satisfied between the object-side outer diameter D1s of the first spacer and the maximum effective radius DT12 of the image side surface of the first lens: 2.0 < D1s / DT12 ≤ 2.5.

[0013] Furthermore, the following condition is satisfied between the image-side inner diameter D2m of the second spacer and the maximum effective semi-aperture DT31 of the object side surface of the third lens: 2.2 < D2m / DT31 < 3.3.

[0014] Furthermore, the following condition is satisfied among the curvature radius R3 of the object side surface of the second lens, the curvature radius R4 of the image side surface of the second lens, and the object-side inner diameter d2s of the second spacer: -3.0 < (R3 + R4) / d2s < 5.5.

[0015] Furthermore, the following condition is satisfied among the combined focal length f123 of the first lens, the second lens, and the third lens, the image-side inner diameter d1m of the first spacer, and the image-side inner diameter d2m of the second spacer: 7.2 < f123 / (d1m - d2m) < 30.5.

[0016] Furthermore, the plurality of spacers further includes a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens. The following condition is satisfied among the effective focal length f4 of the fourth lens, the effective focal length f3 of the third lens, the image-side inner diameter d2m of the second spacer, and the object-side inner diameter d4s of the fourth spacer: -3.5 < f4 / f3 / (d2m / d4s) < -0.5.

[0017] Furthermore, the following conditions are satisfied among the effective focal length f of the optical imaging lens, the effective focal length f2 of the second lens, and the refractive index N2 of the second lens: -3.7 < f / f2 * N2 < -3.0; and the minimum inner diameter Minds of the spacers between the first lens and the second lens and between the second lens and the third lens satisfies: 4.5 mm < Minds < 6.0 mm.

[0018] Further, the lens barrel includes a first lens barrel and a second lens barrel. The first lens, the second lens, and the third lens are disposed in the first lens barrel, and the fourth lens and the fifth lens are disposed in the second lens barrel. The air gap between the third lens and the fourth lens is adjustably set so that the optical imaging lens can be switched between two states, and the change amount of the focal length of the optical imaging lens between the two states is greater than 3.2 mm and less than 4.1 mm; the change amount of the air gap between the third lens and the fourth lens is less than or equal to 3 mm.

[0019] Further, the effective focal length f3 of the third lens, the radius of curvature R6 of the image side of the third lens, and the inner diameter d01m of the image side of the first lens barrel satisfy: -8.0 mm < f3 / R6 * d01m < -3.0 mm.

[0020] Applying the technical solution of the present invention, the optical imaging lens includes a lens barrel, a plurality of lenses, and a plurality of spacers. The plurality of lenses and the plurality of spacers are all disposed in the lens barrel. The plurality of lenses include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially arranged from the object side to the image side. Each lens has a light-transmitting region and a non-light-transmitting region, and the non-light-transmitting region is located on the outer peripheral side of the light-transmitting region; the plurality of spacers at least include a first spacer and a second spacer. The first spacer is located on the image side of the first lens and contacts the image side surface of the first lens, and the second spacer is located on the image side of the second lens and contacts the image side surface of the second lens. The spacer contacts the non-light-transmitting region of the lens; half of the maximum field angle Semi-FOV of the optical imaging lens satisfies: 10° < Semi-FOV < 15°; the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, 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: 0.5 < EP12 / (T12 + T23) < 3.0; the central thickness CT3 of the third lens and the maximum thickness CP2 of the second spacer satisfy: 49.4 < CT3 / CP2 < 91.8; the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction and the central thickness CT2 of the second lens satisfy: 1.4 < EP12 / CT2 < 3.0.

[0021] The optical imaging lens of the present application consists of a lens barrel, multiple lenses, and multiple spacers. By reasonably arranging the multiple lenses and multiple spacers, and when the optical imaging lens satisfies 10° < Semi-FOV < 15° and 0.5 < EP12 / (T12 + T23) < 3.0, it satisfies the characteristics of a small field of view angle, ensuring that the optical imaging lens can achieve long focal length characteristics. However, when satisfying the long focal length characteristics, it is easy to have the situation that the thickness ratio of some lenses is too large or too small. An excessively large or small thickness ratio will cause a large curvature in the transition region between the light-transmitting area and the non-light-transmitting area, which not only affects the molding of some lenses but also has an adverse impact on the later bearing stability. Therefore, in the present application, by restricting the central thickness CT3 of the third lens, the maximum thickness CP2 of the second spacer, and the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction and the central thickness CT2 of the second lens, the thickness ratios of the second lens and the third lens can be controlled. The second lens, as an intermediate lens, indirectly bears against the first lens and the third lens, which is beneficial to the molding manufacturing of the first lens, the second lens, and the third lens. A reasonable thickness ratio ensures more stable bearing of the three lenses, further ensuring that the optical imaging lens can have the best imaging quality when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specification drawings forming a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0023] Figure 1 A dimension marking diagram of an optical imaging lens according to an optional embodiment of the present utility model is shown;

[0024] Figure 2 A schematic structural diagram of the optical imaging lens of Embodiment 1 of the present utility model in the first configuration is shown;

[0025] Figure 3 A schematic structural diagram of the optical imaging lens of Embodiment 1 of the present utility model in the second configuration is shown;

[0026] Figure 4 A schematic structural diagram of the optical imaging lens of Embodiment 1 of the present utility model in the third configuration is shown;

[0027] Figures 5 to 8 The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 1 of the present utility model are respectively shown;

[0028] Figure 9 A schematic structural diagram of the optical imaging lens of Embodiment 2 of the present utility model in the first configuration is shown;

[0029] Figure 10 A schematic diagram of the structure of the optical imaging lens in the second configuration of Embodiment 2 of this utility model is shown;

[0030] Figure 11 A schematic diagram of the structure of the optical imaging lens in the third configuration of Embodiment 2 of this utility model is shown;

[0031] Figures 12 to 15 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 of this utility model are shown respectively.

[0032] Figure 16 A schematic diagram of the structure of the optical imaging lens in the first configuration of Embodiment 3 of this utility model is shown;

[0033] Figure 17 A schematic diagram of the structure of the optical imaging lens in the second configuration of Embodiment 3 of this utility model is shown;

[0034] Figure 18 A schematic diagram of the structure of the optical imaging lens in the third configuration of Embodiment 3 of this utility model is shown;

[0035] Figures 19 to 22 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 of this utility model are shown respectively.

[0036] Figure 23 An assembly stress diagram is shown for an optical imaging lens of an optional embodiment of the present invention when Semi-FOV = 12.2, EP12 / (T12+T23) = 2.55, CT3 / CP2 = 45, and EP12 / CT2 = 1.0.

[0037] Figure 24 The MTF curve of an optical imaging lens according to an optional embodiment of the present invention is shown when Semi-FOV = 12.2, EP12 / (T12+T23) = 2.55, CT3 / CP2 = 45, and EP12 / CT2 = 1.0.

[0038] Figure 25 An assembly stress diagram is shown for an optical imaging lens of an optional embodiment of the present invention when Semi-FOV = 12.2, EP12 / (T12+T23) = 2.55, CT3 / CP2 = 67.95, and EP12 / CT2 = 1.49.

[0039] Figure 26The MTF curve of an optical imaging lens according to an optional embodiment of the present invention is shown when Semi-FOV = 12.2, EP12 / (T12+T23) = 2.55, CT3 / CP2 = 67.95, and EP12 / CT2 = 1.49.

[0040] Figure 27 An assembly stress diagram is shown for an optical imaging lens of an optional embodiment of the present invention when Semi-FOV = 12.2, EP12 / (T12+T23) = 2.55, CT3 / CP2 = 95, and EP12 / CT2 = 3.5.

[0041] Figure 28 The MTF curve of an optical imaging lens according to an optional embodiment of the present invention is shown, which satisfies Semi-FOV = 12.2, EP12 / (T12+T23) = 2.55, CT3 / CP2 = 95, and EP12 / CT2 = 3.5.

[0042] The above figures include the following reference numerals:

[0043] PA, First lens barrel; PB, Second lens barrel; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; E3, Third lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; E4, Fourth lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; E5, Fifth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; P1, First spacer; P2, Second spacer; P3, Third spacer; P4, Fourth spacer; P1b, First auxiliary spacer; P2b, Second auxiliary spacer; P4b, Fourth auxiliary spacer. Detailed Implementation

[0044] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0046] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0047] 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.

[0048] 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.

[0049] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of that 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 that concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine convexity or concavity. For the incident light side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the emitting light side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0050] To address the problem of poor stability in existing optical imaging lenses, this invention provides an optical imaging lens.

[0051] like Figures 1 to 28As shown, in an optional embodiment of the present application, the optical imaging lens includes a lens barrel, a plurality of lenses and a plurality of spacers. The plurality of lenses and the plurality of spacers are both disposed in the lens barrel. The plurality of lenses include a first lens, a second lens, a third lens, a fourth lens and a fifth lens sequentially arranged from the object side to the image side. Each lens has a light-transmitting region and a non-light-transmitting region, and the non-light-transmitting region is located on the outer peripheral side of the light-transmitting region. The plurality of spacers at least include a first spacer and a second spacer. The first spacer is located on the image side of the first lens and contacts the image side surface of the first lens. The second spacer is located on the image side of the second lens and contacts the image side surface of the second lens. The spacer contacts the non-light-transmitting region of the lens. Half of the maximum field angle of the optical imaging lens, Semi-FOV, satisfies: 10° < Semi-FOV < 15°. The spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, 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: 0.5 < EP12 / (T12 + T23) < 3.0. The center thickness CT3 of the third lens and the maximum thickness CP2 of the second spacer satisfy: 49.4 < CT3 / CP2 < 91.8. The spacing distance EP12 between the first spacer and the second spacer in the optical axis direction and the center thickness CT2 of the second lens satisfy: 1.4 < EP12 / CT2 < 3.0.

[0052] The optical imaging lens of the present application is composed of a lens barrel, a plurality of lenses and a plurality of spacers. By reasonably arranging the plurality of lenses and the plurality of spacers, and when the optical imaging lens satisfies 10° < Semi-FOV < 15° and 0.5 < EP12 / (T12 + T23) < 3.0, it satisfies the characteristics of a small field angle and ensures that the optical imaging lens can achieve a telephoto characteristic. However, when satisfying the telephoto characteristic, it is easy to have a situation where the thickness ratio of some lenses is too large or too small. A too large or too small thickness ratio will cause a large curvature in the transition region between the light-transmitting region and the non-light-transmitting region, which not only affects the molding of some lenses but also has an adverse impact on the subsequent bearing stability. Therefore, in the present application, by restricting the center thickness CT3 of the third lens, the maximum thickness CP2 of the second spacer, the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, and the center thickness CT2 of the second lens, the thickness ratios of the second lens and the third lens can be controlled. The second lens, as an intermediate lens, indirectly bears against the first lens and the third lens, which is beneficial to the molding manufacture of the first lens, the second lens and the third lens. A reasonable thickness ratio ensures more stable bearing of the three lenses, and further ensures that the optical imaging lens can have the best imaging quality when in use.

[0053] In addition, when the optical imaging lens satisfies Semi-FOV = 12.2 and EP12 / (T12 + T23) = 2.55, Figure 23 and Figure 24The assembly stress diagram and MTF curve diagram of the optical imaging lens when CT3 / CP2 = 45 and EP12 / CT2 = 1.0 are shown respectively; Figure 25 and Figure 26 The assembly stress diagram and MTF curve diagram of the optical imaging lens when CT3 / CP2 = 67.95 and EP12 / CT2 = 1.49 are shown respectively; Figure 27 and Figure 28 The assembly stress diagram and MTF curve diagram of the optical imaging lens when CT3 / CP2 = 95 and EP12 / CT2 = 3.5 are shown respectively. As Figures 23 to 28 it can be seen, when the constraints Figure 23 、 24 and Figure 27 、 28 are within the corresponding condition ranges, by changing the central thickness of the second lens, most of the field peaks of its MTF curve diagram drop, and the edge contrast of the optical imaging lens decays severely; while when the optical imaging lens satisfies Figure 25 、 26 within the corresponding condition ranges, compared with Figure 23 、 24 and Figure 27 、 28 , the field peaks of the MTF curve diagram are high and consistent for each field, indicating that Figure 25 、 26 correspond to more concentrated fields and higher contrast transfer performance. Therefore, by constraining 49.4 < CT3 / CP2 < 91.8 and 1.4 < EP12 / CT2 < 3.0 in this application, it is beneficial to ensure more stable bearing of the first three lenses, better overall MTF curve performance, and further improve the problem of poor bearing stability under telephoto conditions.

[0054] In this embodiment, the distance EP01 between the object-side end face of the lens barrel and the object-side surface of the first spacer in the optical axis direction, the distance EP12 between the first spacer and the second spacer in the optical axis direction, and the central thickness CT3 of the third lens satisfy: 2.0 < (EP01 + EP12) / CT3 < 4.6. By constraining this conditional formula, by controlling the distance between the object-side end face of the lens barrel and the object-side surface of the first spacer in the optical axis direction, the stray light risk is reduced while ensuring that the lens does not protrude from the lens barrel; by controlling the central thickness of the third lens, the surface sensitivity of the system is improved, and at the same time, the radial height of the light when entering the second group is reduced, and the volume of the entire system is reduced.

[0055] In this embodiment, the following relationships are satisfied among the effective focal length f2 of the second lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens: 0 < |f2 / (R3 + R4)| < 1.2; the following relationship is satisfied between the maximum thickness ETB2 of the non-light-transmitting region of the second lens and the central thickness CT2 of the second lens: 1.2 < ETB2 / CT2 < 3.0. By constraining this conditional expression, the overall uniformity of the second lens can be ensured by controlling the effective focal length, the radii of curvature on both sides, the central thickness of the second lens, and the maximum thickness of the non-light-transmitting region, which is beneficial to the processing of the lens.

[0056] In this embodiment, the following relationship is satisfied between the spacing distance EP01 in the optical axis direction from the object side end face of the lens barrel to the object side surface of the first spacer and the central thickness CT1 of the first lens: 0.7 < EP01 / CT1 < 1.3. By constraining this conditional expression, it is beneficial to the ratio of the central thickness to the edge thickness of the first lens and is conducive to the shaping of the first lens; by controlling the spacing distance in the optical axis direction from the object side end face of the lens barrel to the object side surface of the first spacer, it is beneficial to avoiding stray light of the lens barrel and ensuring that the first lens does not protrude from the lens barrel.

[0057] In this embodiment, the following relationships are satisfied among the effective focal length f2 of the second lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens: -0.5 < f2 / (f1 + f3) < -0.2; the following relationship is satisfied between the inner diameter dIm of the image side surface of the first spacer and the inner diameter d2s of the object side surface of the second spacer: 1.0 < d1m / d2s < 1.5. By constraining this conditional expression, the surface sensitivity is reduced by controlling the effective focal lengths of the first three lenses, which is beneficial to the manufacture of the lens and at the same time ensures the spacing between the first group and the second group; the risk of stray light is avoided by controlling the inner diameter of the image side surface of the first spacer and the inner diameter of the object side surface of the second spacer.

[0058] In this embodiment, the following relationships are satisfied among the central thickness CT1 of the first lens, the air gap T12 between the first lens and the second lens on the optical axis, the central thickness CT3 of the third lens, and the air gap T23 between the second lens and the third lens on the optical axis: 1.0 < (CT1 + T12) / (CT3 + T23) < 1.8; the following relationship is satisfied between the central thickness CT1 of the first lens and the sum ∑CP1 of the maximum thicknesses of all spacers between the first lens and the second lens: 2.4 < CT1 + ∑CP1 < 3.5. By constraining this conditional expression, by reasonably allocating the spatial distribution of the first lens, the second lens, and the third lens and the air gaps between the lenses, sufficient space is given to each lens to avoid interference between the lenses.

[0059] In this embodiment, the following condition is satisfied between the object-side outer diameter D1s of the first spacer and the maximum effective radius DT12 of the image side surface of the first lens: 2.0 < D1s / DT12 ≤ 2.5. By restricting this conditional expression, it is ensured that the first lens has sufficient bearing positions, thus ensuring the stability of the assembly process.

[0060] In this embodiment, the following condition is satisfied between the image-side inner diameter D2m of the second spacer and the maximum effective semi-aperture DT31 of the object side surface of the third lens: 2.2 < D2m / DT31 < 3.3. By restricting this conditional expression, by controlling the ratio of the inner diameter of the image side surface of the second spacer to the maximum effective semi-aperture of the object side surface of the third lens, it is beneficial for the third lens to have sufficient non-light-transmitting areas to bear against the front components.

[0061] In this embodiment, the following condition is satisfied among the curvature radius R3 of the object side surface of the second lens, the curvature radius R4 of the image side surface of the second lens, and the inner diameter d2s of the object side surface of the second spacer: -3.0 < (R3 + R4) / d2s < 5.5. By restricting this conditional expression, by controlling the inner diameter of the object side surface of the second spacer, it is ensured the bearing area between the first lens and the second spacer, ensuring the stability of the system, while reducing the stray light risk of the inner inclined surface of the second spacer; by controlling the curvature radius of the second lens, while ensuring the molding of the second lens, the sensitivity of the system is reduced, the manufacturability is improved, and the ghost image of the second lens is reduced at the same time.

[0062] In this embodiment, the following condition is satisfied among the combined focal length f123 of the first lens, the second lens, and the third lens, the image-side inner diameter d1m of the first spacer, and the image-side inner diameter d2m of the second spacer: 7.2 < f123 / (d1m - d2m) < 30.5. By restricting this conditional expression, by controlling the combined focal length of the first lens, the second lens, and the third lens, it is beneficial to control the distance between the first lens group and the second lens group; by controlling the difference between the inner diameter of the image side surface of the first spacer and the inner diameter of the image side surface of the second spacer, the excess light passing through the edges of the first lens and the second lens can be effectively blocked.

[0063] In this embodiment, the plurality of spacers further includes a fourth spacer, which is located on the image side of the fourth lens and contacts the image side surface of the fourth lens. The following condition is satisfied among the effective focal length f4 of the fourth lens, the effective focal length f3 of the third lens, the inner diameter d2m of the image side surface of the second spacer, and the inner diameter d4s of the object side surface of the fourth spacer: -3.5 < f4 / f3 / (d2m / d4s) < -0.5. By restricting this conditional expression, by controlling the ratio of the effective focal lengths of the third lens and the fourth lens to the ratio of the inner diameter of the image side surface of the second spacer to the inner diameter of the object side surface of the fourth spacer, it is beneficial to reduce the risk of ghost images generated in the fourth lens.

[0064] In this embodiment, the effective focal length f of the optical imaging lens, the effective focal length f2 of the second lens, and the refractive index N2 of the second lens satisfy: -3.7 < f / f2 * N2 < -3.0; the minimum inner diameter Minds of the spacers between the first lens and the second lens and between the second lens and the third lens satisfies: 4.5 mm < Minds < 6.0 mm. The minimum inner diameter of the spacers between the first lens and the second lens and between the second lens and the third lens is controlled to reduce stray light of the first lens group, avoid light leakage, and ensure uniform illuminance of the system.

[0065] In this embodiment, the lens barrel includes a first lens barrel and a second lens barrel. The first lens, the second lens, and the third lens are disposed in the first lens barrel, and the fourth lens and the fifth lens are disposed in the second lens barrel. The air gap between the third lens and the fourth lens is adjustably disposed to enable the optical imaging lens to switch between two states. The change amount of the focal length of the optical imaging lens in the two states is greater than 3.2 mm and less than 4.1 mm; the change amount of the air gap between the third lens and the fourth lens is less than or equal to 3 mm. The optical imaging lens can achieve internal focusing by moving the lens group, meeting the shooting requirements in different situations.

[0066] In this embodiment, the effective focal length f3 of the third lens, the radius of curvature R6 of the image side of the third lens, and the inner diameter d01m of the image side of the first lens barrel satisfy: -8.0 mm < f3 / R6 * d01m < -3.0 mm. By constraining this conditional expression, by controlling the effective focal length and the radius of curvature of the third lens, the overall system focal length is lengthened, the infinity performance is improved, and the inner diameter of the image side of the first lens barrel is controlled to avoid stray light generated by the first lens barrel.

[0067] In addition, in another optional embodiment of the present application, an optical imaging lens is further provided, which includes a lens barrel, a plurality of lenses and a plurality of spacers. The plurality of lenses and the plurality of spacers are both disposed in the lens barrel. The plurality of lenses include a first lens with a positive optical power, a second lens with a negative optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, and a fifth lens with an optical power, which are sequentially arranged from the object side to the image side. Each lens has a light-transmitting region and a non-light-transmitting region, and the non-light-transmitting region is located on the outer peripheral side of the light-transmitting region. The plurality of spacers at least include a first spacer and a second spacer. The first spacer is located on the image side of the first lens and contacts the image side surface of the first lens. The second spacer is located on the image side of the second lens and contacts the image side surface of the second lens. The spacer contacts the non-light-transmitting region of the lens. Half of the maximum field angle of the optical imaging lens, Semi-FOV, satisfies: 10° < Semi-FOV < 15°. The distance EP01 between the object-side end face of the lens barrel and the object-side surface of the first spacer in the optical axis direction, the distance EP12 between the first spacer and the second spacer in the optical axis direction, and the central thickness CT3 of the third lens satisfy 2.0 < (EP01 + EP12) / CT3 < 4.6.

[0068] The optical imaging lens of the present application is composed of a lens barrel and multiple lenses and multiple spacers disposed in the lens barrel. On the premise of satisfying 10° < Semi-FOV < 15°, the long-focus property of the optical imaging lens is ensured. However, in the case of satisfying the long focus, the problem of poor bearing stability is likely to occur. Therefore, in the present application, by restricting 2.0 < (EP01 + EP12) / CT3 < 4.6, by controlling the distance EP01 between the object-side end face of the lens barrel and the object-side surface of the first spacer in the optical axis direction, the stray light risk is reduced while ensuring that the lens does not protrude from the lens barrel. By controlling the central thickness of the third lens, the surface sensitivity of the system is improved, and at the same time, the radial height of the light when entering the second group is reduced, and the volume of the entire system is reduced.

[0069] Optionally, the above optical imaging lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0070] In the optical imaging lens of the present application, multiple lenses can be used, such as the above five lenses. In the present application, at least one of the lens surfaces of each lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0071] 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 five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0072] Figure 1 A schematic diagram of the structure of an optical imaging lens of this application is shown, wherein Figure 1 The figures clearly indicate parameters such as CP1, CP1b, CP2, EP01, EP12, ETB2, d4s, d2s, d2m, d1m, d01m, and D2m to provide a clear and intuitive understanding of their meaning. For the sake of clarity regarding the optical imaging lens and specific surface shapes, these parameters will not be shown in the accompanying figures when describing specific embodiments.

[0073] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical imaging lenses applicable to the above embodiments.

[0074] It should be noted that the following embodiments include a first configuration, a second configuration, and a third configuration. In the first, second, and third configurations of the same embodiment, the curvature radius, center thickness, and other parameters of the first to fifth lenses, as well as the spacing distance and higher-order coefficients between the lenses, are the same. However, the thickness, inner diameter, and outer diameter of the lens barrel, the first to sixth spacers, and the shape of some lenses are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0075] It should be noted that any one of the following embodiments, from Embodiment 1 to Embodiment 3, is applicable to all embodiments of this application.

[0076] Of course, this embodiment may also include other parametric expressions as described in the above embodiments, which will not be elaborated here.

[0077] Example 1

[0078] like Figures 2 to 8 As shown, the optical imaging lens of Embodiment 1 is described. Figure 2 A schematic diagram of the optical imaging lens in the first configuration of Embodiment 1 is shown. Figure 3 A schematic diagram of the optical imaging lens of Embodiment 1 in the second configuration is shown. Figure 4 A schematic diagram of the optical imaging lens of Embodiment 1 in the third configuration is shown.

[0079] like Figures 2 to 4As shown, the optical imaging lens includes a first lens barrel PA and a second lens barrel PB. The second lens barrel PB is located on the image side of the first lens barrel PA. The first lens barrel PA includes, from the object side to the image side, the following components in sequence: a first lens E1, a first spacer P1, a first auxiliary spacer P1b, a second lens E2, a second spacer P2, and a third lens E3. The second lens barrel PB includes, from the object side to the image side, the following components in sequence: a fourth lens E4, a fourth spacer P4, and a fifth lens E5.

[0080] like Figure 2 As shown, in the first configuration, the optical imaging lens includes multiple spacers, including a second auxiliary spacer P2b. The object-side and image-side of the first spacer P1 abut against the image-side S2 of the first lens and the object-side of the first auxiliary spacer P1b, respectively. The object-side S3 and image-side S4 of the second lens abut against the image-side of the first auxiliary spacer P1b and the object-side of the second spacer P2, respectively. The object-side and image-side of the second auxiliary spacer P2b abut against the image-side of the second spacer P2 and the object-side S5 of the third lens, respectively. The image-side S6 of the third lens abuts against the PA portion of the first lens barrel. The object-side S7 of the fourth lens abuts against the PB portion of the second lens barrel. The object-side and image-side of the fourth spacer P4 abut against the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively.

[0081] like Figure 3 As shown, in the second configuration, the bearing and contact method of each spacer of the optical imaging lens is the same as that in the first configuration. Please refer to the relevant description in the first configuration, which will not be repeated here.

[0082] like Figure 4 As shown, in the third configuration, the optical imaging lens does not have a second auxiliary spacer P2b. The object-side and image-side of the first spacer P1 abut against the image-side S2 of the first lens and the object-side portion of the first auxiliary spacer P1b, respectively. The object-side S3 and image-side S4 of the second lens abut against the image-side of the first auxiliary spacer P1b and the object-side portion of the second spacer P2, respectively. The object-side S5 and image-side S6 of the third lens abut against the image-side of the second spacer P2 and a portion of the first lens barrel PA, respectively. The object-side S7 of the fourth lens abuts against a portion of the second lens barrel PB. The object-side and image-side of the fourth spacer P4 abut against portions of the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively.

[0083] In summary, the structural parameters of the optical imaging lens in Embodiment 1 in the first configuration 1-1, the second configuration 1-2, and the third configuration 1-3 are shown in Table 1. (Unit: mm)

[0084] Parameters / Status 1-1 1-2 1-3 d1m 6.610 6.354 6.858 d2s 5.969 5.965 5.960 d2m 5.969 5.965 5.960 D2m 7.320 7.300 7.338 d4s 4.327 5.646 4.286 EP01 1.631 1.633 1.649 EP12 1.789 1.747 1.795 CP2 0.020 0.020 0.018 ETB2 1.767 1.743 1.788 d01m 5.943 5.923 5.961 ∑CP1 1.016 1.016 1.011

[0085] Table 1

[0086] In Embodiment 1, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is convex. The object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is concave.

[0087] In Example 1, the effective focal length f of the optical imaging lens when it is at infinity is 18.00 mm, the effective focal length f1 of the first lens is 12.42 mm, the effective focal length f2 of the second lens is -9.15 mm, the effective focal length f3 of the third lens is 8.91 mm, the effective focal length f4 of the fourth lens is -21.09 mm, the effective focal length f5 of the fifth lens is -65.98 mm, the combined focal length f123 of the first, second, and third lenses is 11.81 mm, and half of the maximum field of view (Semi-FOV) of the optical imaging lens is 12.40°.

[0088] Table 2 shows the basic structural parameters of the optical imaging lens in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0089]

[0090]

[0091] Table 2

[0092] In Embodiment 1, the object-side and image-side surfaces of the first to fifth lenses are aspherical surfaces, and the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0093]

[0094] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 3 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror s1-s10 in Example 1.

[0095]

[0096]

[0097] Table 3

[0098] Figure 5 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 6 The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 7 The distortion curve of the optical imaging lens of Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 8 The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0099] according to Figures 5 to 8 As can be seen, the optical imaging lens given in Example 1 can achieve good imaging quality.

[0100] Example 2

[0101] like Figures 9 to 15 As shown, the optical imaging lens of Embodiment 2 is described. Figure 9 A schematic diagram of the optical imaging lens in the first configuration of Embodiment 2 is shown. Figure 10 A schematic diagram of the optical imaging lens in the second configuration of Embodiment 2 is shown. Figure 11 A schematic diagram of the optical imaging lens of Embodiment 2 in the third configuration is shown.

[0102] like Figures 9 to 11 As shown, the optical imaging lens includes a first lens barrel PA and a second lens barrel PB. The second lens barrel PB is located on the image side of the first lens barrel PA. The first lens barrel PA includes, from the object side to the image side, the following components in sequence: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, and a third lens E3. The second lens barrel PB includes, from the object side to the image side, the following components in sequence: a fourth lens E4, a fourth spacer P4, a fourth auxiliary spacer P4b, and a fifth lens E5.

[0103] like Figure 9 As shown, in the first configuration, the object-side and image-side surfaces of the first spacer P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side and image-side surfaces of the second spacer P2 abut against the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The image-side surface S6 of the third lens abuts against the first lens barrel PA. The object-side surface S7 of the fourth lens abuts against the second lens barrel PB. The object-side and image-side surfaces of the fourth spacer P4 abut against the image-side surface S8 of the fourth lens and the object-side surface of the fourth auxiliary spacer P4b, respectively. The object-side surface S9 of the fifth lens abuts against the image-side surface of the fourth auxiliary spacer P4b.

[0104] like Figure 10 As shown, in the second configuration, the bearing and contact method of each spacer of the optical imaging lens is the same as that in the first configuration. Please refer to the relevant description in the first configuration, which will not be repeated here.

[0105] like Figure 11 As shown, in the third configuration, the optical imaging lens includes multiple spacers, including a first auxiliary spacer P1b. The object-side and image-side of the first spacer P1b abut against the image-side S2 of the first lens and the object-side portion of the first auxiliary spacer P1b, respectively. The object-side S3 and image-side S4 of the second lens abut against the image-side of the first auxiliary spacer P1b and the object-side portion of the second spacer P2, respectively. The object-side S5 and image-side S6 of the third lens abut against the image-side of the second spacer P2 and a portion of the first lens barrel PA, respectively. The object-side S7 of the fourth lens abuts against a portion of the second lens barrel PB. The object-side and image-side of the fourth spacer P4 abut against the image-side S8 of the fourth lens and the object-side portion of the fourth auxiliary spacer P4b, respectively. The object-side S9 of the fifth lens abuts against the image-side portion of the fourth auxiliary spacer P4b.

[0106] In summary, the structural parameters of the optical imaging lens in Embodiment 2 in the first configuration 2-1, the second configuration 2-2, and the third configuration 2-3 are shown in Table 4. (Unit: mm)

[0107] Parameters / Status 2-1 2-2 2-3 d1m 6.588 6.169 6.223 d2s 5.543 5.542 5.543 d2m 5.543 5.542 5.543 D2m 7.420 7.420 7.420 d4s 4.539 5.518 5.204 EP01 3.132 3.389 3.174 EP12 1.943 2.132 1.925 CP2 0.022 0.020 0.018 ETB2 1.942 2.132 1.925 d01m 5.405 5.405 5.405 ∑CP1 0.486 0.020 0.444

[0108] Table 4

[0109] In Embodiment 2, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is concave, and the image-side surface S8 of the fourth lens is convex. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is concave.

[0110] In Example 2, the effective focal length f of the optical imaging lens when it is at infinity is 18.00 mm, the effective focal length f1 of the first lens is 28.25 mm, the effective focal length f2 of the second lens is -9.21 mm, the effective focal length f3 of the third lens is 5.91 mm, the effective focal length f4 of the fourth lens is -19.85 mm, the effective focal length f5 of the fifth lens is 189.42 mm, the combined focal length f123 of the first, second, and third lenses is 11.85 mm, and half of the maximum field of view (Semi-FOV) of the optical imaging lens is 12.20°.

[0111] Table 5 shows the basic structural parameters of the optical imaging lens in Embodiment 2, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0112]

[0113]

[0114] Table 5

[0115] Table 6 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror s1-s10 in Example 2.

[0116] Face number A4 A6 A8 A10 A12 A14 A16 s1 -8.43E-02 -1.59E-02 -9.72E-04 -8.49E-05 -2.06E-05 6.08E-06 -9.93E-06 s2 -2.00E-01 -1.31E-02 -4.84E-05 8.84E-04 -5.71E-04 3.09E-04 -8.34E-05 s3 -5.81E-01 5.45E-02 -6.56E-03 1.55E-03 -6.37E-04 3.73E-04 -6.52E-05 s4 -7.17E-01 7.89E-02 -8.92E-03 2.59E-03 2.48E-04 5.95E-04 -1.15E-05 s5 -4.32E-01 2.11E-02 3.86E-04 1.71E-03 1.21E-03 7.10E-04 7.43E-05 s6 4.68E-02 5.35E-03 9.68E-04 5.75E-04 4.65E-04 2.26E-04 5.05E-05 s7 6.21E-01 -4.86E-02 8.89E-03 -1.52E-03 3.31E-04 -8.56E-05 2.08E-05 s8 5.62E-01 -5.22E-02 9.95E-03 -2.11E-03 5.89E-04 -1.95E-04 5.13E-05 s9 -1.31E-01 -1.74E-02 5.40E-03 -1.80E-03 6.49E-04 -2.63E-04 7.43E-05 s10 -3.23E-01 8.24E-03 -1.64E-03 2.23E-04 -2.38E-05 -5.18E-05 1.16E-05 Face number A18 A20 A22 A24 A26 A28 A30 s1 6.10E-06 1.40E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s2 4.60E-05 -3.61E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s3 8.47E-06 -2.28E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s4 -1.70E-04 -1.67E-05 -1.00E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s5 -2.47E-04 -4.88E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s6 -4.62E-05 -5.77E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s7 -7.57E-06 2.08E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s8 -2.12E-05 6.63E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s9 -2.93E-05 1.46E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s10 1.17E-06 1.05E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0117] Table 6

[0118] Figure 12 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 13 The astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14 The distortion curve of the optical imaging lens of Embodiment 2 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 15 The magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0119] according to Figures 12 to 15 It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0120] Example 3

[0121] like Figures 16 to 22 As shown, the optical imaging lens of Embodiment 3 is described. Figure 16 A schematic diagram of the optical imaging lens in the first configuration of Embodiment 3 is shown. Figure 17 A schematic diagram of the optical imaging lens in the second configuration of Embodiment 3 is shown. Figure 18 A schematic diagram of the optical imaging lens in the third configuration of Embodiment 3 is shown.

[0122] like Figures 16 to 18As shown, the optical imaging lens includes a first lens barrel PA and a second lens barrel PB. The second lens barrel PB is located on the image side of the first lens barrel PA. The first lens barrel PA includes, from the object side to the image side, the following components in sequence: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, and a third lens E3. The second lens barrel PB includes, from the object side to the image side, the following components in sequence: a fourth lens E4, a fourth spacer P4, a fourth auxiliary spacer P4b, and a fifth lens E5.

[0123] like Figure 16 As shown, in the first configuration, the optical imaging lens includes multiple spacers, including a first auxiliary spacer P1b and a second auxiliary spacer P2b. The object-side and image-side of the first spacer P1b abut against the image-side S2 of the first lens and the object-side portion of the first auxiliary spacer P1b, respectively. The object-side S3 and image-side S4 of the second lens abut against the image-side of the first auxiliary spacer P1b and the object-side portion of the second spacer P2b, respectively. The object-side and image-side of the second auxiliary spacer P2b abut against the image-side of the second spacer P2 and the object-side S5 portion of the third lens, respectively. The image-side S6 of the third lens abuts against the PA portion of the first lens barrel. The object-side S7 of the fourth lens abuts against the PB portion of the second lens barrel. The object-side and image-side of the fourth spacer P4 abut against the image-side S8 of the fourth lens and the object-side portion of the fourth auxiliary spacer P4b, respectively. The object-side S9 of the fifth lens abuts against the image-side portion of the fourth auxiliary spacer P4b.

[0124] like Figure 17 As shown, in the second configuration, the optical imaging lens does not have the first auxiliary spacer P1b. The object-side and image-side of the first spacer P1 abut against the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer P2 abut against the image-side S4 of the second lens and the object-side of the second auxiliary spacer P2b, respectively. The object-side S5 and image-side S6 of the third lens abut against the image-side of the second auxiliary spacer P2b and the PA portion of the first lens barrel, respectively. The object-side S7 of the fourth lens abuts against the PB portion of the second lens barrel. The object-side and image-side of the fourth spacer P4 abut against the image-side S8 of the fourth lens and the object-side of the fourth auxiliary spacer P4b, respectively. The object-side S9 of the fifth lens abuts against the image-side of the fourth auxiliary spacer P4b.

[0125] like Figure 18As shown, in the third configuration, the optical imaging lens does not have the first auxiliary spacer P1b and the second auxiliary spacer P2b. The object-side and image-side of the first spacer P1 abut against the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer P2 abut against the image-side S4 of the second lens and the object-side S5 of the third lens, respectively. The image-side S6 of the third lens abuts against the PA portion of the first lens barrel. The object-side S7 of the fourth lens abuts against the PB portion of the second lens barrel. The object-side and image-side of the fourth spacer P4 abut against the image-side S8 of the fourth lens and the object-side of the fourth auxiliary spacer P4b, respectively. The object-side S9 of the fifth lens abuts against the image-side of the fourth auxiliary spacer P4b.

[0126] In summary, the structural parameters of the optical imaging lens in Embodiment 3 in the first configuration 3-1, the second configuration 3-2, and the third configuration 3-3 are shown in Table 7. (Unit: mm)

[0127]

[0128]

[0129] Table 7

[0130] In Embodiment 3, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is convex. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is concave, and the image-side surface S8 of the fourth lens is convex. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is concave.

[0131] In Example 3, the effective focal length f of the optical imaging lens when it is at infinity is 18.00 mm, the effective focal length f1 of the first lens is 7.32 mm, the effective focal length f2 of the second lens is -8.16 mm, the effective focal length f3 of the third lens is 16.96 mm, the effective focal length f4 of the fourth lens is -12.87 mm, the effective focal length f5 of the fifth lens is 45.53 mm, the combined focal length f123 of the first, second, and third lenses is 11.73 mm, and half of the maximum field of view (Semi-FOV) of the optical imaging lens is 12.23°.

[0132] Table 8 shows the basic structural parameters of the optical imaging lens in Embodiment 3, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0133]

[0134] Table 8

[0135] Table 9 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror s1-s10 in Example 3.

[0136] Face number A4 A6 A8 A10 A12 A14 A16 s1 -2.70E-02 -3.17E-03 -3.44E-04 -1.67E-04 -6.43E-05 -3.60E-05 -4.73E-06 s2 1.63E-01 -5.37E-03 -5.28E-04 -1.09E-03 3.86E-04 -3.20E-04 1.74E-04 s3 -1.43E-01 3.40E-02 -5.90E-03 -7.22E-04 3.83E-04 -3.45E-04 1.48E-04 s4 -2.03E-01 2.52E-02 -2.23E-03 -4.01E-04 -9.76E-06 -1.15E-04 8.94E-06 s5 2.38E-02 4.76E-03 1.74E-03 -1.97E-04 -3.49E-05 -2.65E-05 1.42E-05 s6 2.41E-02 2.26E-03 9.81E-04 -7.16E-05 -3.58E-06 -2.26E-05 1.63E-05 s7 4.23E-01 -3.67E-02 5.95E-03 -1.20E-03 2.72E-04 -7.19E-05 1.32E-05 s8 3.85E-01 -3.39E-02 5.52E-03 -1.14E-03 2.46E-04 -5.27E-05 1.71E-05 s9 -1.08E-01 -2.03E-03 2.58E-03 -1.02E-03 3.54E-04 -1.07E-04 3.10E-05 s10 -1.98E-01 3.92E-03 2.73E-04 -3.18E-04 1.46E-04 -3.85E-05 4.02E-06 Face number A18 A20 A22 A24 A26 A28 A30 s1 1.01E-05 1.14E-05 -1.19E-06 -7.04E-06 -5.08E-06 -1.64E-06 -6.53E-07 s2 -1.02E-04 3.01E-05 -6.26E-05 3.61E-06 -1.18E-05 -2.96E-06 2.12E-06 s3 -1.10E-04 -4.10E-07 -6.42E-05 -5.40E-06 -5.89E-06 -1.23E-05 -2.73E-07 s4 -3.57E-05 -2.49E-05 -3.15E-05 -1.77E-05 -1.62E-06 -3.48E-06 -5.38E-07 s5 -9.30E-06 -4.00E-06 -1.25E-05 -1.76E-06 -1.61E-06 1.18E-06 -1.39E-06 s6 -8.00E-07 6.00E-06 -3.80E-06 4.98E-07 -8.14E-07 -1.31E-06 -3.83E-07 s7 -9.82E-06 6.29E-06 -8.63E-07 1.76E-06 9.44E-07 4.44E-07 -9.21E-07 s8 -9.58E-06 6.17E-06 -3.49E-06 2.90E-06 -2.44E-06 2.35E-06 -1.67E-06 s9 -1.61E-05 3.75E-06 -3.16E-06 5.60E-06 -6.37E-07 4.09E-06 -2.81E-06 s10 -5.24E-06 -3.67E-06 6.47E-07 3.53E-06 2.41E-06 1.46E-06 -1.12E-06

[0137] Table 9

[0138] Figure 19 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 20 The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 21 The distortion curve of the optical imaging lens of Embodiment 3 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 22 The magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0139] according to Figures 19 to 22 It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0140] In summary, Examples 1 to 3 satisfy the relationships shown in Table 10.

[0141]

[0142]

[0143] Table 10

[0144] It should be noted that in Table 10, 1-1 represents the optical imaging lens in the first embodiment in the first configuration, 1-2 represents the optical imaging lens in the second configuration in the first embodiment, 1-3 represents the optical imaging lens in the third configuration in the first embodiment, 2-1 represents the optical imaging lens in the second embodiment in the first configuration, 2-2 represents the optical imaging lens in the second configuration in the second embodiment, 2-3 represents the optical imaging lens in the third configuration in the second embodiment, 3-1 represents the optical imaging lens in the third embodiment in the first configuration, 3-2 represents the optical imaging lens in the third embodiment in the second configuration, and 3-3 represents the optical imaging lens in the third configuration in the third embodiment.

[0145] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0146] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0147] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0148] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An optical imaging lens, characterized in that: It includes a lens barrel, a plurality of lenses and a plurality of spacers. The plurality of lenses and the plurality of spacers are both arranged in the lens barrel. The plurality of lenses include a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side. Each lens has a light-transmitting region and a non-light-transmitting region, and the non-light-transmitting region is located on the outer peripheral side of the light-transmitting region. The plurality of spacers at least include a first spacer and a second spacer. The first spacer is located on the image side of the first lens and contacts the image side surface of the first lens. The second spacer is located on the image side of the second lens and contacts the image side surface of the second lens. The spacer contacts the non-light-transmitting region of the lens. Half of the maximum field of view of the optical imaging lens, Semi-FOV, satisfies: 10° < Semi-FOV < 15°. The spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, 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: 0.5 < EP12 / (T12 + T23) < 3.

0. The central thickness CT3 of the third lens and the maximum thickness CP2 of the second spacer satisfy: 49.4 < CT3 / CP2 < 91.

8. The spacing distance EP12 between the first spacer and the second spacer in the optical axis direction and the central thickness CT2 of the second lens satisfy: 1.4 < EP12 / CT2 < 3.

0.

2. The optical imaging lens according to claim 1, wherein: The spacing distance EP01 between the object side end face of the lens barrel and the object side surface of the first spacer in the optical axis direction, the spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, and the central thickness CT3 of the third lens satisfy: 2.0 < (EP01 + EP12) / CT3 < 4.

6.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f2 of the second lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 0 < |f2 / (R3 + R4)| < 1.2; the maximum thickness ETB2 of the non-light-transmitting region of the second lens and the central thickness CT2 of the second lens satisfy: 1.2 < ETB2 / CT2 < 3.

0.

4. The optical imaging lens according to claim 1, wherein: The spacing distance EP01 between the object side end face of the lens barrel and the object side surface of the first spacer in the optical axis direction and the central thickness CT1 of the first lens satisfy: 0.7 < EP01 / CT1 < 1.

3.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f2 of the second lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens satisfy: -0.5 < f2 / (f1 + f3) < -0.2; the image side inner diameter d1m of the first spacer and the object side inner diameter d2s of the second spacer satisfy: 1.0 < d1m / d2s < 1.

5.

6. The optical imaging lens according to claim 1, wherein: The center thickness CT1 of the first lens, the air gap T12 between the first lens and the second lens on the optical axis, the center thickness CT3 of the third lens and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 1.0<(CT1+T12) / (CT3+T23)<1.8; the center thickness CT1 of the first lens and the sum ∑CP1 of the maximum thickness of all spacers between the first lens and the second lens satisfy: 2.4 <CT1+∑CP1<3.5。 7. The optical imaging lens according to claim 1, wherein: The object side outer diameter D1s of the first spacer and the maximum effective radius DT12 of the image side of the first lens satisfy: 2.0 <D1s / DT12≤2.5。 8. The optical imaging lens according to claim 1, wherein: The image side inner diameter D2m of the second spacer and the maximum effective half-aperture DT31 of the object side of the third lens satisfy: 2.2 <D2m / DT31<3.3。 9. The optical imaging lens according to claim 1, wherein: The curvature radius R3 of the object side surface of the second lens, the curvature radius R4 of the image side surface of the second lens, and the object side inner diameter d2s of the second spacer satisfy: -3.0<(R3+R4) / d2s<5.

5.

10. The optical imaging lens according to claim 1, wherein: The combined focal length f123 of the first lens, the second lens and the third lens, the image side inner diameter d1m of the first spacer and the image side inner diameter d2m of the second spacer satisfy: 7.2 <f123 / (d1m-d2m)<30.5。

Images