Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a prism and eight lenses with focal power, and the image side surface of the eighth lens is provided with at least one inflection point; the following conditions are satisfied: 2.9 lt; and TTL / Imgh * FNOlt is carried out; 6.4); the requirement of-10.0 lt is met; f1 / f2lt; -0.9;-0.9; the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens meet the following formula:-0.6 lt; f4 / f5lt; 0.2 part; the effective focal length f of the optical imaging lens and the effective focal length f3 of the third lens meet the following condition: 0.8 lt; f3 / flt; 1.5 parts; the distance P from the incident plane of the prism to the emergent plane of the prism on the optical axis meets Pgt; and the thickness is 7.0 mm. The optical imaging lens solves the problem that an optical imaging lens in the prior art is difficult to give consideration to large image surface and light weight at the same time.

Description

Technical Field

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

[0002] As users' requirements for mobile phone camera functions continue to increase, the demand for large image plane and high-performance optical imaging lenses is also growing. In order to meet users' diverse shooting needs, smartphones usually need to be equipped with multiple optical imaging lenses, especially high-end flagship models, which often need to be equipped with four or more optical imaging lenses to cover shooting needs of different focal lengths, and at the same time, it is necessary to ensure that multiple optical imaging lenses have less jitter when working. This means that more CMOS photosensitive chips need to be added, and higher-precision motors need to be equipped to meet the anti-shake requirements of optical imaging lenses, which not only increases production costs, but also increases the space it occupies, which is not conducive to the needs of lightweight models and cost reduction. Therefore, optical imaging lenses that can be used on mobile phones and have large image planes and zoom functions have become a major trend in the current industry.

[0003] That is to say, the optical imaging lens in the prior art has the problem that it is difficult to achieve both a large image surface and light weight at the same time. Utility Model Content

[0004] The main purpose of the utility model is to provide an optical imaging lens to solve the problem that the optical imaging lens in the prior art has a large image surface and is difficult to be lightweight at the same time.

[0005] To achieve the above object, according to one aspect of the present utility model, an optical imaging lens is provided, which includes a prism and eight lenses with optical power. The eight lenses with optical power sequentially include a first lens, a second lens, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens, a sixth lens, a seventh lens, and an eighth lens with negative optical power from the object side to the image side. The image side surface of the eighth lens has at least one inflection point, and there is an air gap between two adjacent lenses among the eight lenses; the prism is located between the first lens and the imaging surface of the optical imaging lens, and the prism has an incident surface, a reflecting surface, and an exit surface; the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis, half of the image height Imgh corresponding to the maximum field of view of the optical imaging lens, and the f-number FNO of the optical imaging lens satisfy: 2.9 < TTL / Imgh * FNO < 6.4; the ratio of the effective focal length f1 of the first lens to the effective focal length f2 of the second lens satisfies -10.0 < f1 / f2 < -0.9; the ratio of the effective focal length f4 of the fourth lens to the effective focal length f5 of the fifth lens satisfies: -0.6 < f4 / f5 < 0.2; the ratio of the effective focal length f3 of the third lens to the effective focal length f of the optical imaging lens satisfies: 0.8 < f3 / f < 1.5; the distance P from the incident surface of the prism to the exit surface of the prism on the optical axis satisfies: P > 7.0 mm.

[0006] Further, the ratio of the effective focal length f6 of the sixth lens to the effective focal length f7 of the seventh lens satisfies: -2.8 < f6 / f7 < 48.2.

[0007] Further, the optical imaging lens is configured to switch between infinity and macro, and the ratio of the effective focal length f6 of the sixth lens to the effective focal length f7 of the seventh lens satisfies: 35.2 < f6 / f7 < 48.2.

[0008] Further, the incident surface of the prism is a spherical surface or an aspherical surface, the exit surface of the prism is a spherical surface or an aspherical surface, and the distance P from the incident surface of the prism to the exit surface of the prism on the optical axis, the air gap PL between the prism and the lens closest to the incident surface of the prism on the optical axis, and the air gap PR between the prism and the lens closest to the exit surface of the prism on the optical axis satisfy: 3.4 < P / (PL + PR) < 16.8.

[0009] Further, the ratio of the central thickness CT7 of the seventh lens, the central thickness CT8 of the eighth lens, the central thickness CT5 of the fifth lens to the central thickness CT6 of the sixth lens satisfies: 1.4 < (CT7 + CT8) / (CT5 + CT6) < 2.6.

[0010] Furthermore, the distance TTL from the object side of the first lens to the imaging surface on the optical axis, the distance P from the incident surface of the prism to the exit surface of the prism on the optical axis and the refractive index NP of the prism satisfy: 1.2 <TTL / (P*NP)<2.0。

[0011] Further, the image side surface of the second lens is a convex surface, and a curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: -3.8<(R3+R4) / (R3-R4)<0.

[0012] Furthermore, the maximum effective half-aperture DT12 of the image side surface of the first lens and the maximum effective half-aperture DT22 of the image side surface of the second lens satisfy: 1.2 <DT12 / DT22<2.0。

[0013] Furthermore, when the optical imaging lens is at infinity, the air gap T78 between the seventh lens and the eighth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: 1.1<(T78+T67) / (T56+T45)<2.2.

[0014] Furthermore, the maximum effective half-aperture DT61 of the object side surface of the sixth lens, the maximum effective half-aperture DT62 of the image side surface of the sixth lens, the maximum effective half-aperture DT51 of the object side surface of the fifth lens and the maximum effective half-aperture DT52 of the image side surface of the fifth lens satisfy: 0.8<(DT61+DT62) / (DT51+DT52)<1.2.

[0015] Furthermore, the effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens satisfy 3.2<|f1 / f8|<7.5.

[0016] Furthermore, when the optical imaging lens is at infinity, the distance T28 on the optical axis from the object side of the second lens to the image side of the eighth lens and the distance P on the optical axis from the incident surface of the prism to the exit surface of the prism satisfy the following relationship: 1.0 <T28 / P<2.0。

[0017] Furthermore, the distance YC82 from the inflection point closest to the optical axis on the image side of the eighth lens to the optical axis and the center thickness CT8 of the eighth lens satisfy the following relationship: 1.8 <YC82 / CT8<4.4。

[0018] According to another aspect of the present utility model, an optical imaging lens is further provided, which includes a prism and eight lenses with optical power. The eight lenses with optical power sequentially include a first lens, a second lens, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens, a sixth lens, a seventh lens, and an eighth lens with negative optical power from the object side to the image side. The image side surface of the eighth lens has at least one inflection point, and there is an air gap between two adjacent lenses among the eight lenses; the prism is located between the first lens and the imaging surface of the optical imaging lens, and the prism has an incident surface, a reflecting surface, and an exit surface; the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis, half of the image height Imgh corresponding to the maximum field of view of the optical imaging lens, and the f-number FNO of the optical imaging lens satisfy: 2.9 < TTL / Imgh * FNO < 6.4; the ratio of the effective focal length f1 of the first lens to the effective focal length f2 of the second lens satisfies: -10.0 < f1 / f2 < -0.9; the incident surface of the prism is a spherical surface or an aspherical surface, the exit surface of the prism is a spherical surface or an aspherical surface, the distance P on the optical axis from the incident surface of the prism to the exit surface of the prism, the air gap PL on the optical axis between the prism and the lens closest to the incident surface of the prism, and the air gap PR on the optical axis between the prism and the lens closest to the exit surface of the prism satisfy: 3.4 < P / (PL + PR) < 16.8.

[0019] Applying the technical solution of the present utility model, the optical imaging lens includes a prism and eight lenses with optical power. The eight lenses with optical power sequentially include a first lens, a second lens, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens, a sixth lens, a seventh lens, and an eighth lens with negative optical power from the object side to the image side. The image side surface of the eighth lens has at least one inflection point, and there is an air gap between two adjacent lenses among the eight lenses; the prism is located between the first lens and the imaging surface of the optical imaging lens, and the prism has an incident surface, a reflecting surface, and an exit surface; the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis, half of the image height Imgh corresponding to the maximum field of view of the optical imaging lens, and the f-number FNO of the optical imaging lens satisfy: 2.9 < TTL / Imgh * FNO < 6.4; the ratio of the effective focal length f1 of the first lens to the effective focal length f2 of the second lens satisfies: -10.0 < f1 / f2 < -0.9; the ratio of the effective focal length f4 of the fourth lens to the effective focal length f5 of the fifth lens satisfies: -0.6 < f4 / f5 < 0.2; the ratio of the effective focal length f of the optical imaging lens to the effective focal length f3 of the third lens satisfies: 0.8 < f3 / f < 1.5; the distance P on the optical axis from the incident surface of the prism to the exit surface of the prism satisfies: P > 7.0 mm.

[0020] The optical imaging lens of the present application is composed of a prism and eight lenses with optical power. By reasonably matching the optical power of the eight lenses, reasonably setting the position of the prism, reasonably controlling the distance TTL from the object side of the first lens to the imaging surface on the optical axis, half the image height Imgh corresponding to the maximum field of view of the optical imaging lens, the aperture number FNO of the optical imaging lens, the focal length of the optical imaging lens, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens, it is beneficial to ensure good imaging quality while ensuring that the optical imaging lens meets the large image surface. At the same time, by reasonably allocating the first lens and the second lens The focal length of the lens can be increased to improve the aberration of the system, which is beneficial to improving the imaging quality. By placing a prism and reasonably constraining the thickness of the prism, the prism can realize the turning of the light path. The total length of the system is compressed by the turning of light, which is beneficial to reducing the overall size of the optical imaging lens and meeting the demand for lightweight. At the same time, the position of the prism is reasonably set, and the optical image stabilization function can be realized in conjunction with the lenses before and after the prism and the motor. The setting of the prism can cooperate with the large image surface and the larger aperture to ensure that the optical imaging lens can obtain sufficient light input. At the same time, while meeting the characteristics of the large image surface, it ensures that good imaging pictures can still be obtained under various shooting requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 A dimension diagram of an optical imaging lens according to an optional embodiment of the utility model is shown;

[0023] Figure 2 A schematic structural diagram of an optical imaging lens according to a first embodiment of the present utility model is shown;

[0024] Figures 3 to 6 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the first embodiment of the utility model are respectively shown;

[0025] Figure 7 A schematic structural diagram of an optical imaging lens according to a second embodiment of the present utility model is shown;

[0026] Figures 8 to 11 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the second embodiment of the utility model are respectively shown;

[0027] Fig.12 A schematic structural diagram of an optical imaging lens in a first state according to a third embodiment of the present utility model is shown;

[0028] Fig.13 A schematic structural diagram of an optical imaging lens in a second state according to a third embodiment of the present utility model is shown;

[0029] Figures 14 to 17 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the third embodiment of the utility model are respectively shown;

[0030] Fig.18 A schematic structural diagram of an optical imaging lens in a first state according to a fourth embodiment of the present utility model is shown;

[0031] Fig.19 A schematic structural diagram of an optical imaging lens in a second state according to a fourth embodiment of the present utility model is shown;

[0032] Figures 20 to 23 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the fourth embodiment of the utility model are respectively shown;

[0033] Fig.24 A schematic structural diagram of an optical imaging lens according to a fifth embodiment of the present utility model is shown;

[0034] Figures 25 to 28 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the fifth embodiment of the utility model are respectively shown;

[0035] Fig.29 A schematic structural diagram of an optical imaging lens according to a sixth embodiment of the present utility model is shown;

[0036] Figures 30 to 33 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the sixth embodiment of the utility model are respectively shown;

[0037] Fig.34 The figure shows a schematic structural diagram of an optical imaging lens according to a seventh embodiment of the present utility model;

[0038] Figures 35 to 38 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the seventh embodiment of the utility model are respectively shown;

[0039] Fig.39 A schematic structural diagram of an optical imaging lens according to an eighth embodiment of the present utility model is shown;

[0040] Figures 40 to 43 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the eighth embodiment of the utility model are respectively shown;

[0041] Fig.44 A schematic diagram of the optical path of an optical imaging lens of an optional embodiment of the utility model is shown.

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

[0043] E1, first lens; E2, second lens; E3, third lens; E4, fourth lens; E5, fifth lens; E6, sixth lens; E7, seventh lens; E8, eighth lens; E9, protective glass; P, prism. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model 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 meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0046] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0047] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0048] In the 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 shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0049] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the concavity and convexity are judged by the positive and negative values of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software). Taking the light-incident side as an example, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; taking the light-emitting side as an example, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0050] In order to solve the problem that it is difficult to simultaneously take into account a large image surface and light weight in the existing optical imaging lens, the present utility model provides an optical imaging lens.

[0051] As Figures 1 to 44 shown, in an optional embodiment of the present application, the optical imaging lens includes a prism and eight lenses with optical power. The eight lenses with optical power include a first lens, a second lens, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens, a sixth lens, a seventh lens, and an eighth lens with negative optical power in sequence from the object side to the image side. The image side of the eighth lens has at least one inflection point, and there is an air gap between two adjacent lenses among the eight lenses; the prism is located between the first lens and the imaging surface of the optical imaging lens, and the prism has an incident surface, a reflecting surface, and an exit surface; the distance TTL from the object side of the first lens to the imaging surface on the optical axis, half of the image height Imgh corresponding to the maximum field of view of the optical imaging lens, and the f-number FNO of the optical imaging lens satisfy: 2.9 < TTL / Imgh * FNO < 6.4; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy -10.0 < f1 / f2 < -0.9; the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: -0.6 < f4 / f5 < 0.2; the effective focal length f of the optical imaging lens and the effective focal length f3 of the third lens satisfy: 0.8 < f3 / f < 1.5; the distance P from the incident surface of the prism to the exit surface of the prism on the optical axis satisfies: P > 7.0 mm.

[0052] The optical imaging lens of the present application is composed of a prism and eight lenses with optical power. By reasonably matching the optical power of the eight lenses, reasonably setting the position of the prism, reasonably controlling the distance TTL from the object side of the first lens to the imaging surface on the optical axis, half the image height Imgh corresponding to the maximum field of view of the optical imaging lens, the aperture number FNO of the optical imaging lens, the focal length of the optical imaging lens, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens, it is beneficial to ensure good imaging quality while ensuring that the optical imaging lens meets the large image surface. At the same time, by reasonably allocating the first lens and the second lens The focal length of the lens can be increased to improve the aberration of the system, which is beneficial to improving the imaging quality. By placing a prism and reasonably constraining the thickness of the prism, the prism can realize the turning of the light path. The total length of the system is compressed by the turning of light, which is beneficial to reducing the overall size of the optical imaging lens and meeting the demand for lightweight. At the same time, the position of the prism is reasonably set, and the optical image stabilization function can be realized in conjunction with the lenses before and after the prism and the motor. The setting of the prism can cooperate with the large image surface and the larger aperture to ensure that the optical imaging lens can obtain sufficient light input. At the same time, while meeting the characteristics of the large image surface, it ensures that good imaging pictures can still be obtained under various shooting requirements.

[0053] also, Fig.44 A schematic diagram of the optical path of an optical imaging lens of an optional embodiment of the present application is shown, wherein a prism is located between the first lens and the second lens, the central axis of the first lens is perpendicular to the central axis of the group lens composed of the second lens to the seventh lens, the light deflection between the first lens and the second lens is achieved by the prism, the incident surface and the exit surface of the prism are respectively perpendicular to the central axis of the first lens and the central axis of the second lens, and the center of the reflection surface of the prism coincides with the intersection of the central axis of the first lens and the central axis of the second lens. After emitting from the light source, the light enters the optical imaging lens. Among them, the central light enters the second lens to the seventh lens after being reflected by the reflection surface of the prism and converges to the center of the imaging surface, and the edge light on the same side of the optical axis enters the rear lens after being reflected by the reflection surface of the prism.

[0054] It should be noted that the optical imaging lens of the present application can at least switch between the infinity state and the macro state by adjusting the gap size between the prism and the second lens on the optical axis and the gap size between the seventh lens and the eighth lens on the optical axis, while keeping the gaps between the other adjacent lenses unchanged, thereby realizing the zoom function and satisfying the macro and telephoto shooting functions.

[0055] In this embodiment, the object side surface of the first lens is convex; the image side surface of the second lens is convex; the object side surface of the third lens is convex and the image side surface is convex; the image side surface of the fourth lens is concave; the object side surface of the sixth lens is convex and the image side surface is concave; the image side surface of the seventh lens is convex; the image side surface of the eighth lens is concave. By reasonably constraining the shapes of the surfaces of each lens, it is beneficial to match the surface shape with the optical power, regulate the light path, facilitate the smooth transition of light, and ensure the reliability of imaging; at the same time, through the reasonable matching of the surface shapes, it is beneficial for adjacent lenses to cancel out aberrations with each other and improve the imaging quality.

[0056] In this embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -2.8 < f6 / f7 < 48.2. By constraining this conditional expression and controlling the ratio of the effective focal length of the sixth lens to the effective focal length of the seventh lens, it is beneficial to control aberrations and helps to obtain the best imaging quality.

[0057] In this embodiment, the optical imaging lens is capable of switching between infinity and macro, and the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: 35.2 < f6 / f7 < 48.2. By constraining this conditional expression, when the optical imaging lens realizes internal focusing, it can ensure that the changes in the gaps between the second lens and the prism and between the seventh lens and the eighth lens in the infinity state and the macro state are relatively small, reduce the implementation difficulty of other components such as the motor, and at the same time prevent excessive increase in aberrations during macro and improve the purple fringing phenomenon in macro.

[0058] In this embodiment, the incident surface of the prism is spherical or aspherical, the exit surface of the prism is spherical or aspherical, and the distance P on the optical axis from the incident surface of the prism to the exit surface of the prism, the air gap PL on the optical axis between the prism and the lens closest to the incident surface of the prism, and the air gap PR on the optical axis between the prism and the lens closest to the exit surface of the prism satisfy: 3.4 < P / (PL + PR) < 16.8. By constraining this conditional expression and controlling the position of the exit light of the prism on the exit surface of the prism, the ray height of the lens group composed of the lenses behind the prism can be effectively reduced, the overall size of the optical imaging lens can be reduced, which helps to meet the miniaturization requirements, and enables the optical imaging lens to ensure a larger image plane while meeting the miniaturization.

[0059] In this embodiment, the central thickness CT7 of the seventh lens, the central thickness CT8 of the eighth lens, the central thickness CT5 of the fifth lens, and the central thickness CT6 of the sixth lens satisfy: 1.4 < (CT7 + CT8) / (CT5 + CT6) < 2.6. By constraining this conditional expression and reasonably distributing the thicknesses of the fifth lens, the sixth lens, the seventh lens, and the eighth lens, the rear-end size of the optical imaging lens can be effectively controlled, and the volume of the optical imaging lens can be prevented from being too large.

[0060] In this embodiment, the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis, the distance P from the incident surface of the prism to the exit surface of the prism on the optical axis, and the refractive index NP of the prism satisfy: 1.2 < TTL / (P * NP) < 2.0. By constraining this conditional expression, the position of the exit light rays of the prism and the space occupancy of the prism within the optical imaging lens can be reasonably allocated. Meanwhile, by controlling the refractive index of the prism, appropriate reflection of light rays can be ensured.

[0061] In this embodiment, the image side surface of the second lens is convex, and 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: -3.8 < (R3 + R4) / (R3 - R4) < 0. By constraining this conditional expression, by constraining the curvature radii of the two side surfaces of the second lens, optical distortion can be reduced, ensuring better imaging quality.

[0062] In this embodiment, the maximum effective semi-aperture DT12 of the image side surface of the first lens and the maximum effective semi-aperture DT22 of the image side surface of the second lens satisfy: 1.2 < DT12 / DT22 < 2.0. By constraining this conditional expression, by controlling the ratio of the sizes of the first lens and the second lens, it is beneficial to reduce the size of the second lens, enabling smooth transition of light rays between the first lens and the second lens, avoiding the formation of ghost images by the reflected light rays between the first lens and the second lens, and thus ensuring imaging quality.

[0063] In this embodiment, when the optical imaging lens is at infinity, the air gap T78 between the seventh lens and the eighth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.1 < (T78 + T67) / (T56 + T45) < 2.2. By constraining this conditional expression, by reasonably allocating the air gaps between the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens on the optical axis, the rear end size of the optical imaging lens can be controlled, avoiding the optical imaging lens from being too large in volume.

[0064] In this embodiment, the following condition is satisfied among the maximum effective semi-aperture DT61 of the object side surface of the sixth lens, the maximum effective semi-aperture DT62 of the image side surface of the sixth lens, the maximum effective semi-aperture DT51 of the object side surface of the fifth lens, and the maximum effective semi-aperture DT52 of the image side surface of the fifth lens: 0.8 < (DT61 + DT62) / (DT51 + DT52) < 1.2. By constraining this conditional expression and controlling the sizes of the fifth lens and the sixth lens, the effective diameter segment difference between the fifth lens and the sixth lens and the radial size of the optical imaging lens are reasonably controlled, thereby improving the matching degree of the angle between the chief ray of the optical imaging lens and the chip, and at the same time facilitating the reduction of the optical sensitivity of the optical imaging lens.

[0065] In this embodiment, the following condition is satisfied between the effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens: 3.2 < |f1 / f8| < 7.5. By constraining this conditional expression and controlling the effective focal lengths of the first lens and the eighth lens, it helps to control the optical powers of the first lens and the last lens of the optical imaging lens, thereby constraining the sensitivities in field curvature and thickness and improving the MTF of the optical imaging lens.

[0066] In this embodiment, when the optical imaging lens is in the infinity state, the following condition is satisfied between the distance T28 on the optical axis from the object side surface of the second lens to the image side surface of the eighth lens and the distance P on the optical axis from the incident surface of the prism to the exit surface of the prism: 1.0 < T28 / P < 2.0. By constraining this conditional expression and controlling the overall size of the lens group composed of the second lens to the eighth lens, the spatial occupancy ratio of the prism in the optical imaging lens is controlled, thereby controlling the thickness of the prism under the condition of meeting the required reflection effect and controlling the weight of the prism within a reasonable range, which is beneficial to realizing the light weight of the optical imaging lens.

[0067] In this embodiment, the following condition is satisfied between the distance YC82 on the optical axis from the inflection point closest to the optical axis on the image side surface of the eighth lens and the central thickness CT8 of the eighth lens: 1.8 < YC82 / CT8 < 4.4. By constraining this conditional expression and controlling the inflection point position on the image side surface of the eighth lens and the thickness of the eighth lens, it is beneficial to reduce the magnitude of optical distortion, ensure good imaging quality, and at the same time facilitate the control of ghost images caused by internal reflection in the eighth lens.

[0068] As Figures 1 to 43As shown, in another alternative embodiment of the present application, the optical imaging lens includes a prism and eight lenses with optical power. The eight lenses with optical power sequentially include a first lens, a second lens, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens, a sixth lens, a seventh lens, and an eighth lens with negative optical power from the object side to the image side. The image side surface of the eighth lens has at least one inflection point, and there is an air gap between two adjacent lenses among the eight lenses; the prism is located between the first lens and the imaging surface of the optical imaging lens, and the prism has an incident surface, a reflection surface, and an exit surface; the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis, half of the image height Imgh corresponding to the maximum field of view of the optical imaging lens, and the f-number FNO of the optical imaging lens satisfy: 2.9 < TTL / Imgh * FNO < 6.4; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy -10.0 < f1 / f2 < -0.9; the incident surface of the prism is a spherical surface or an aspherical surface, the exit surface of the prism is a spherical surface or an aspherical surface, the distance P from the incident surface of the prism to the exit surface of the prism on the optical axis, the air gap PL between the prism and the lens closest to the incident surface of the prism on the optical axis, and the air gap PR between the prism and the lens closest to the exit surface of the prism on the optical axis satisfy: 3.4 < P / (PL + PR) < 16.8.

[0069] The optical imaging lens of the present application is composed of a prism and eight lenses with optical power. By reasonably matching the optical power of the eight lenses, reasonably setting the position of the prism, reasonably controlling the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis, half of the image height Imgh corresponding to the maximum field of view of the optical imaging lens, the f-number FNO of the optical imaging lens, the focal lengths of the first lens and the second lens, the thickness of the prism, and the air gaps before and after the prism, while ensuring that the optical imaging lens satisfies a large image plane, it can ensure a large light input amount, ensure good imaging quality, and at the same time improve the aberration of the system by reasonably distributing the optical power of the first lens and the second lens, which is beneficial to improving the imaging quality. At the same time, by controlling the position of the outgoing light of the prism on the exit surface of the prism, the light height of the lens group composed of the lenses behind the prism is effectively reduced, and the overall size of the optical imaging lens is reduced, which helps to meet the miniaturization requirements, so that the optical imaging lens can ensure a larger image plane while meeting the miniaturization.

[0070] Of course, this embodiment also includes other parametric formulas in the above embodiments, which will not be elaborated here one by one.

[0071] Optionally, the above optical imaging lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0072] The optical imaging lens in the present application may use multiple lenses, such as the eight lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0073] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although eight lenses are described as an example in the embodiments, the optical imaging lens is not limited to including eight lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0074] Figure 1 A schematic diagram of the dimensions of an optical imaging lens of the present application is shown, wherein Figure 1 Parameters such as DT12, DT51, DT52, DT61, DT62, DT22, and YC82 are marked in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the optical imaging lens and the specific surface shape, these parameters will no longer be reflected in the drawings when describing the specific embodiments later.

[0075] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0076] It should be noted that the optical imaging lens of the present application can selectively achieve zooming. That is to say, in some optional embodiments of the present application, the optical imaging lens may not be zoomed, that is, the optical imaging lens has only one state, which may be an infinite distance state. In another optional embodiment of the present application, the optical imaging lens can achieve zooming, that is, the optical imaging lens has only multiple states, and can achieve switching between multiple states. Optionally, when the optical lens can achieve zooming, the optical imaging lens has at least an infinite distance state and a macro state, and can achieve switching between the infinite distance state and the macro state.

[0077] It should be noted that in the following embodiments 3 and 4, there are infinite distance states and macro states. The optical imaging lenses of embodiments 3 and 4 can switch between the infinite distance state and the macro state, and the other embodiments are structures in the infinite distance state. It should be noted that any one of the following embodiments 1 to 8 is applicable to all implementation methods of the present application.

[0078] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0079] Embodiment 1

[0080] like Figures 2 to 6 As shown, the optical imaging lens of the first embodiment is described. Figure 2 A schematic structural diagram of an optical imaging lens according to Embodiment 1 is shown.

[0081] like Figure 2 As shown, the optical imaging lens includes: a first lens E1, a second lens E2, a prism P, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass E9 and an imaging surface S21, which are arranged in sequence from the object side to the image side along the optical axis.

[0082] In Embodiment 1, the first lens has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens has negative focal power, 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 prism is a plane, and the image side surface S6 of the prism is a plane. The third lens has positive focal power, the object side surface S7 of the third lens is convex, and the image side surface S8 of the third lens is convex. The fourth lens has negative focal power, the object side surface S9 of the fourth lens is convex, and the image side surface S10 of the fourth lens is concave. The fifth lens has negative focal power, the object side surface S11 of the fifth lens is convex, and the image side surface S12 of the fifth lens is concave. The sixth lens has negative focal power, the object side surface S13 of the sixth lens is convex, and the image side surface S14 of the sixth lens is concave. The seventh lens has positive power, the object side surface S15 of the seventh lens is convex, and the image side surface S16 of the seventh lens is convex. The eighth lens has negative power, the object side surface S17 of the eighth lens is convex, and the image side surface S18 of the eighth lens is concave.

[0083] Table 1 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0084]

[0085] Table 1

[0086] In the first embodiment, the object side surface and the image side surface of the first lens to the eighth lens are all aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0087]

[0088] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R, that is, the paraxial curvature c is the reciprocal of the curvature radius R in Table 2 above; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspheric mirror surface S1-S18 in Example 1.

[0089]

[0090]

[0091] Table 2

[0092] Figure 3 The axial chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 4 The astigmatism curve of the optical imaging lens of the first embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 5 The distortion curve of the optical imaging lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Figure 6 The magnification chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0093] according to Figures 3 to 6 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0094] Embodiment 2

[0095] like Figures 7 to 11 As shown, the optical imaging lens of the second embodiment is described. Figure 7 A schematic structural diagram of an optical imaging lens according to a second embodiment is shown.

[0096] like Figure 7 As shown, the optical imaging lens includes: a first lens E1, a prism P, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass E9 and an imaging surface S21, which are arranged in sequence from the object side to the image side along the optical axis.

[0097] In the second embodiment, the first lens has negative focal power, 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 prism is a plane, and the image side surface S4 of the prism is a plane. The second lens has positive focal power, the object side surface S5 of the second lens is convex, and the image side surface S6 of the second lens is convex. The third lens has positive focal power, the object side surface S7 of the third lens is convex, and the image side surface S8 of the third lens is convex. The fourth lens has negative focal power, the object side surface S9 of the fourth lens is concave, and the image side surface S10 of the fourth lens is concave. The fifth lens has positive focal power, the object side surface S11 of the fifth lens is concave, and the image side surface S12 of the fifth lens is convex. The sixth lens has positive focal power, the object side surface S13 of the sixth lens is convex, and the image side surface S14 of the sixth lens is concave. The seventh lens has negative power, the object side surface S15 of the seventh lens is concave, and the image side surface S16 of the seventh lens is convex. The eighth lens has negative power, the object side surface S17 of the eighth lens is convex, and the image side surface S18 of the eighth lens is concave.

[0098] Table 3 shows the basic structural parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0099]

[0100] Table 3

[0101] Table 4 below lists the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirror surfaces S1-S18 in the second embodiment.

[0102] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.91E-01 1.22E-02 1.83E-03 6.35E-06 0.00E+00 0.00E+00 0.00E+00 S2 4.79E-02 4.41E-03 -1.41E-04 1.27E-06 0.00E+00 0.00E+00 0.00E+00 S5 4.36E-02 1.54E-02 3.82E-03 4.67E-04 0.00E+00 0.00E+00 0.00E+00 S6 2.19E-01 9.70E-03 2.93E-03 -1.39E-04 0.00E+00 0.00E+00 0.00E+00 S7 7.77E-02 1.76E-02 2.06E-03 -8.12E-05 0.00E+00 0.00E+00 0.00E+00 S8 -1.23E-01 1.64E-02 -1.92E-03 4.80E-04 0.00E+00 0.00E+00 0.00E+00 S9 -5.56E-02 1.59E-03 -1.30E-03 5.47E-04 0.00E+00 0.00E+00 0.00E+00 S10 -4.96E-02 2.05E-04 -2.90E-04 1.26E-04 0.00E+00 0.00E+00 0.00E+00 S11 -1.95E-01 3.13E-03 1.71E-03 5.02E-04 0.00E+00 0.00E+00 0.00E+00 S12 -5.87E-02 9.95E-03 4.86E-03 6.12E-04 1.80E-05 0.00E+00 0.00E+00 S13 -5.95E-02 1.28E-02 3.45E-03 -1.32E-04 0.00E+00 0.00E+00 0.00E+00 S14 -2.71E-01 6.45E-03 3.65E-03 7.50E-04 0.00E+00 0.00E+00 0.00E+00 S15 2.10E-02 -3.63E-02 1.69E-03 2.62E-04 0.00E+00 0.00E+00 0.00E+00 S16 2.59E-01 -1.87E-02 1.87E-03 -1.22E-04 0.00E+00 0.00E+00 0.00E+00 S17 -1.25E+00 8.55E-02 -2.39E-02 7.86E-04 2.74E-05 3.98E-06 4.71E-07 S18 -3.76E+00 1.54E-01 -9.25E-02 1.84E-02 -6.57E-04 0.00E+00 0.00E+00

[0103] Table 4

[0104] Figure 8 The axial chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical imaging lens. Fig. 9 The astigmatism curve of the optical imaging lens of the second embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.10 The distortion curve of the optical imaging lens of the second embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.11 The magnification chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0105] according to Figures 8 to 11 It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0106] Embodiment 3

[0107] like Figures 12 to 17 As shown, the optical imaging lens of embodiment 3 is described. Fig.12 FIG. 1 shows a schematic diagram of the structure of the optical imaging lens of Embodiment 3 in an infinite distance state. Fig.13 A schematic structural diagram of the optical imaging lens of Embodiment 3 in a macro state is shown.

[0108] like Figure 12 to Figure 13 As shown, the optical imaging lens includes: a first lens E1, a prism P, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass E9 and an imaging surface S21, which are arranged in sequence from the object side to the image side along the optical axis.

[0109] Some parameters of the infinite distance state and the macro distance state of the third embodiment are shown in Table 5.

[0110] Status / Parameters f(mm) FNO Semi-FOV(°) Infinite distance state 10.86 1.59 32.13 Macro state 10.64 1.55 30.43

[0111] Table 5

[0112] In Embodiment 3, the first lens has negative focal power, 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 prism is a plane, and the image side surface S4 of the prism is a plane. The second lens has positive focal power, the object side surface S5 of the second lens is convex, and the image side surface S6 of the second lens is convex. The third lens has positive focal power, the object side surface S7 of the third lens is convex, and the image side surface S8 of the third lens is convex. The fourth lens has negative focal power, the object side surface S9 of the fourth lens is concave, and the image side surface S10 of the fourth lens is concave. The fifth lens has positive focal power, the object side surface S11 of the fifth lens is concave, and the image side surface S12 of the fifth lens is convex. The sixth lens has positive focal power, the object side surface S13 of the sixth lens is convex, and the image side surface S14 of the sixth lens is concave. The seventh lens has positive power, the object side surface S15 of the seventh lens is concave, and the image side surface S16 of the seventh lens is convex. The eighth lens has negative power, the object side surface S17 of the eighth lens is convex, and the image side surface S18 of the eighth lens is concave.

[0113] Table 6 shows a basic structural parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0114]

[0115] Table 6

[0116] Table 7 below gives the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface S1-S18 in Example 3.

[0117] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.60E-01 4.72E-02 -4.56E-03 2.77E-04 0.00E+00 0.00E+00 0.00E+00 S2 -1.70E-01 2.57E-02 -2.93E-03 1.61E-04 0.00E+00 0.00E+00 0.00E+00 S5 8.72E-02 1.50E-02 2.94E-03 3.89E-04 0.00E+00 0.00E+00 0.00E+00 S6 2.35E-01 9.34E-03 2.54E-03 -4.31E-05 0.00E+00 0.00E+00 0.00E+00 S7 3.89E-02 1.54E-02 2.25E-03 8.66E-05 0.00E+00 0.00E+00 0.00E+00 S8 -9.65E-02 1.46E-02 -5.10E-04 1.70E-04 0.00E+00 0.00E+00 0.00E+00 S9 -1.13E-01 6.01E-03 -1.72E-04 1.89E-04 0.00E+00 0.00E+00 0.00E+00 S10 -9.54E-02 1.10E-03 1.16E-04 1.39E-04 0.00E+00 0.00E+00 0.00E+00 S11 -1.11E-01 -9.37E-03 1.93E-03 3.72E-05 0.00E+00 0.00E+00 0.00E+00 S12 -9.55E-03 8.10E-04 1.72E-03 1.48E-04 1.32E-05 0.00E+00 0.00E+00 S13 -3.06E-01 4.68E-02 -6.24E-04 -8.68E-05 0.00E+00 0.00E+00 0.00E+00 S14 -4.53E-01 4.11E-02 1.50E-03 4.12E-04 0.00E+00 0.00E+00 0.00E+00 S15 6.92E-02 -3.95E-02 1.09E-03 9.67E-04 0.00E+00 0.00E+00 0.00E+00 S16 2.65E-01 -2.32E-02 2.99E-03 1.35E-03 0.00E+00 0.00E+00 0.00E+00 S17 -1.52E+00 6.98E-02 -2.00E-02 7.75E-04 2.46E-04 4.97E-05 5.09E-06 S18 -3.90E+00 1.44E-01 -9.29E-02 5.72E-03 -9.31E-04 0.00E+00 0.00E+00

[0118] Table 7

[0119] Fig.14 The axial chromatic aberration curve of the optical imaging lens of the third embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.15 The astigmatism curve of the optical imaging lens of the third embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.16 The distortion curve of the optical imaging lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.17 The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0120] according to Figures 14 to 17 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0121] Embodiment 4

[0122] like Figures 18 to 23 As shown, the optical imaging lens of Example 4 is described. Fig.18 FIG. 4 is a schematic diagram showing the structure of the optical imaging lens of the fourth embodiment in the infinite distance state. Fig.19 A schematic structural diagram of the optical imaging lens of Embodiment 4 in a macro state is shown.

[0123] like Figure 18 to Figure 19 As shown, the optical imaging lens includes: a first lens E1, a prism P, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass E9 and an imaging surface S21, which are arranged in sequence from the object side to the image side along the optical axis.

[0124] Some parameters of the infinite distance state and the macro distance state of the fourth embodiment are shown in Table 8.

[0125] Status / Parameters f(mm) FNO Semi-FOV(°) Infinite distance state 10.91 1.59 31.97 Macro state 10.68 1.55 30.29

[0126] Table 8

[0127] In Embodiment 4, the first lens has negative focal power, 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 prism is a plane, and the image side surface S4 of the prism is a plane. The second lens has positive focal power, the object side surface S5 of the second lens is convex, and the image side surface S6 of the second lens is convex. The third lens has positive focal power, the object side surface S7 of the third lens is convex, and the image side surface S8 of the third lens is convex. The fourth lens has negative focal power, the object side surface S9 of the fourth lens is concave, and the image side surface S10 of the fourth lens is concave. The fifth lens has positive focal power, the object side surface S11 of the fifth lens is concave, and the image side surface S12 of the fifth lens is convex. The sixth lens has positive focal power, the object side surface S13 of the sixth lens is convex, and the image side surface S14 of the sixth lens is concave. The seventh lens has positive power, the object side surface S15 of the seventh lens is concave, and the image side surface S16 of the seventh lens is convex. The eighth lens has negative power, the object side surface S17 of the eighth lens is convex, and the image side surface S18 of the eighth lens is concave.

[0128] Table 9 shows a basic structural parameter table of the optical imaging lens of Example 4, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0129]

[0130] Table 9

[0131] Table 10 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirror surfaces S1-S18 in Example 4.

[0132] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.59E-01 4.71E-02 -4.57E-03 2.90E-04 0.00E+00 0.00E+00 0.00E+00 S2 -1.72E-01 2.59E-02 -2.95E-03 1.62E-04 0.00E+00 0.00E+00 0.00E+00 S5 9.01E-02 1.58E-02 3.12E-03 4.09E-04 0.00E+00 0.00E+00 0.00E+00 S6 2.34E-01 9.30E-03 2.53E-03 -2.89E-05 0.00E+00 0.00E+00 0.00E+00 S7 3.93E-02 1.54E-02 2.26E-03 8.33E-05 0.00E+00 0.00E+00 0.00E+00 S8 -9.64E-02 1.45E-02 -5.25E-04 1.82E-04 0.00E+00 0.00E+00 0.00E+00 S9 -1.13E-01 6.03E-03 -1.83E-04 1.90E-04 0.00E+00 0.00E+00 0.00E+00 S10 -9.43E-02 1.00E-03 1.34E-04 1.34E-04 0.00E+00 0.00E+00 0.00E+00 S11 -1.12E-01 -9.45E-03 1.97E-03 2.92E-05 0.00E+00 0.00E+00 0.00E+00 S12 -9.80E-03 9.94E-04 1.75E-03 1.57E-04 1.39E-05 0.00E+00 0.00E+00 S13 -3.05E-01 4.67E-02 -5.64E-04 -9.68E-05 0.00E+00 0.00E+00 0.00E+00 S14 -4.52E-01 4.09E-02 1.43E-03 4.18E-04 0.00E+00 0.00E+00 0.00E+00 S15 6.84E-02 -3.93E-02 1.10E-03 9.56E-04 0.00E+00 0.00E+00 0.00E+00 S16 2.67E-01 -2.39E-02 3.14E-03 1.31E-03 0.00E+00 0.00E+00 0.00E+00 S17 -1.56E+00 7.14E-02 -2.11E-02 9.43E-04 2.90E-04 5.84E-05 5.96E-06 S18 -3.65E+00 1.56E-01 -8.37E-02 4.96E-03 -8.57E-04 0.00E+00 0.00E+00

[0133] Table 10

[0134] Fig. 20 The axial chromatic aberration curve of the optical imaging lens of the fourth embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.21 The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 22 The distortion curve of the optical imaging lens of the fourth embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.23 The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0135] according to Figure 20 to Figure 23 It can be seen that the optical imaging lens provided in the fourth embodiment can achieve good imaging quality.

[0136] Embodiment 5

[0137] like Figures 24 to 28 As shown, the optical imaging lens of Example 5 is described. Fig.24 A schematic structural diagram of an optical imaging lens according to a fifth embodiment is shown.

[0138] like Fig.24 As shown, the optical imaging lens includes: a first lens E1, a prism P, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass E9 and an imaging surface S21, which are arranged in sequence from the object side to the image side along the optical axis.

[0139] In Embodiment 5, the first lens has negative focal power, 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 prism is convex, and the image side surface S4 of the prism is concave. The second lens has positive focal power, the object side surface S5 of the second lens is convex, and the image side surface S6 of the second lens is convex. The third lens has positive focal power, the object side surface S7 of the third lens is convex, and the image side surface S8 of the third lens is convex. The fourth lens has negative focal power, the object side surface S9 of the fourth lens is convex, and the image side surface S10 of the fourth lens is concave. The fifth lens has positive focal power, the object side surface S11 of the fifth lens is concave, and the image side surface S12 of the fifth lens is convex. The sixth lens has positive focal power, the object side surface S13 of the sixth lens is convex, and the image side surface S14 of the sixth lens is concave. The seventh lens has negative power, the object side surface S15 of the seventh lens is concave, and the image side surface S16 of the seventh lens is convex. The eighth lens has negative power, the object side surface S17 of the eighth lens is concave, and the image side surface S18 of the eighth lens is concave.

[0140] Table 11 shows a basic structural parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0141]

[0142] Table 11

[0143] Table 12 below gives the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface S1-S18 in Example 5.

[0144]

[0145]

[0146] Table 12

[0147] Fig.25The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.26 The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 27 The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.28 The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0148] according to Figure 25 to Figure 28 It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0149] Embodiment 6

[0150] like Figure 29 to Figure 33 As shown, the optical imaging lens of Example 6 is described. Fig.29 A schematic structural diagram of an optical imaging lens according to a sixth embodiment is shown.

[0151] like Fig.29 As shown, the optical imaging lens includes: a first lens E1, a prism P, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass E9 and an imaging surface S21, which are arranged in sequence from the object side to the image side along the optical axis.

[0152] In Example 6, the first lens has negative focal power, 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 prism is concave, and the image side surface S4 of the prism is concave. The second lens has positive focal power, the object side surface S5 of the second lens is convex, and the image side surface S6 of the second lens is convex. The third lens has positive focal power, the object side surface S7 of the third lens is convex, and the image side surface S8 of the third lens is convex. The fourth lens has negative focal power, the object side surface S9 of the fourth lens is convex, and the image side surface S10 of the fourth lens is concave. The fifth lens has positive focal power, the object side surface S11 of the fifth lens is concave, and the image side surface S12 of the fifth lens is convex. The sixth lens has positive focal power, the object side surface S13 of the sixth lens is convex, and the image side surface S14 of the sixth lens is concave. The seventh lens has negative power, the object side surface S15 of the seventh lens is concave, and the image side surface S16 of the seventh lens is convex. The eighth lens has negative power, the object side surface S17 of the eighth lens is convex, and the image side surface S18 of the eighth lens is concave.

[0153] Table 13 shows a basic structural parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0154]

[0155]

[0156] Table 13

[0157] Table 14 below gives the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirror surfaces S1-S18 in Example 6.

[0158] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.77E-01 1.93E-02 1.56E-03 -2.18E-04 0.00E+00 0.00E+00 0.00E+00 S2 -3.23E-02 2.80E-04 2.97E-05 -8.56E-07 0.00E+00 0.00E+00 0.00E+00 S5 9.38E-03 1.45E-02 4.47E-03 5.19E-04 0.00E+00 0.00E+00 0.00E+00 S6 3.13E-01 1.42E-02 5.18E-03 -9.79E-06 0.00E+00 0.00E+00 0.00E+00 S7 3.28E-02 1.39E-02 1.03E-03 -1.11E-04 0.00E+00 0.00E+00 0.00E+00 S8 -2.13E-01 3.64E-02 -2.63E-03 6.50E-04 0.00E+00 0.00E+00 0.00E+00 S9 -7.18E-02 5.32E-03 -1.47E-03 2.69E-04 0.00E+00 0.00E+00 0.00E+00 S10 -1.39E-01 9.04E-03 -6.36E-04 4.67E-04 0.00E+00 0.00E+00 0.00E+00 S11 -1.75E-01 4.35E-03 1.48E-03 4.74E-04 0.00E+00 0.00E+00 0.00E+00 S12 -3.80E-02 1.45E-02 6.98E-03 1.22E-03 6.23E-05 0.00E+00 0.00E+00 S13 -1.10E-01 2.20E-02 3.68E-03 -4.74E-04 0.00E+00 0.00E+00 0.00E+00 S14 -2.83E-01 9.19E-03 5.26E-03 3.87E-04 0.00E+00 0.00E+00 0.00E+00 S15 9.87E-02 -5.43E-02 5.21E-03 -1.03E-05 0.00E+00 0.00E+00 0.00E+00 S16 2.43E-01 -2.62E-02 7.05E-03 -9.45E-04 0.00E+00 0.00E+00 0.00E+00 S17 -1.24E+00 8.06E-02 -1.75E-02 -1.30E-03 -5.33E-05 -1.78E-06 2.87E-08 S18 -3.21E+00 1.64E-01 -5.31E-02 9.01E-03 -1.67E-04 0.00E+00 0.00E+00

[0159] Table 14

[0160] Fig.30 The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical imaging lens. Fig.31 The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.32 The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.33 The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0161] according to Figure 30 to Figure 33 It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0162] Embodiment 7

[0163] like Figure 34 to Figure 38 As shown, the optical imaging lens of Example 7 is described. Fig.34 A schematic structural diagram of an optical imaging lens according to a seventh embodiment is shown.

[0164] like Fig.34 As shown, the optical imaging lens includes: a first lens E1, a prism P, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass E9 and an imaging surface S21, which are arranged in sequence from the object side to the image side along the optical axis.

[0165] In Embodiment 7, the first lens has negative focal power, 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 prism is concave, and the image side surface S4 of the prism is concave. The second lens has positive focal power, the object side surface S5 of the second lens is convex, and the image side surface S6 of the second lens is convex. The third lens has positive focal power, the object side surface S7 of the third lens is convex, and the image side surface S8 of the third lens is convex. The fourth lens has negative focal power, the object side surface S9 of the fourth lens is convex, and the image side surface S10 of the fourth lens is concave. The fifth lens has positive focal power, the object side surface S11 of the fifth lens is concave, and the image side surface S12 of the fifth lens is convex. The sixth lens has positive focal power, the object side surface S13 of the sixth lens is convex, and the image side surface S14 of the sixth lens is concave. The seventh lens has negative power, the object side surface S15 of the seventh lens is concave, and the image side surface S16 of the seventh lens is convex. The eighth lens has negative power, the object side surface S17 of the eighth lens is concave, and the image side surface S18 of the eighth lens is concave.

[0166] Table 15 shows a basic structural parameter table of the optical imaging lens of Example 7, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0167]

[0168]

[0169] Table 15

[0170] Table 16 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 that can be used for the aspheric mirror surfaces S1-S18 in Example 7.

[0171]

[0172]

[0173] Table 16

[0174] Fig.35 The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.36 The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.37 The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.38 The magnification chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0175] according to Figures 35 to 38 It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0176] Embodiment 8

[0177] like Figure 39 to Figure 43 As shown, the optical imaging lens of Example 8 is described. Fig.39 A schematic structural diagram of an optical imaging lens according to Embodiment 8 is shown.

[0178] like Fig.39 As shown, the optical imaging lens includes: a first lens E1, a prism P, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass E9 and an imaging surface S21, which are arranged in sequence from the object side to the image side along the optical axis.

[0179] In Embodiment 8, the first lens has negative focal power, 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 prism is concave, and the image side surface S4 of the prism is concave. The second lens has positive focal power, the object side surface S5 of the second lens is convex, and the image side surface S6 of the second lens is convex. The third lens has positive focal power, the object side surface S7 of the third lens is convex, and the image side surface S8 of the third lens is convex. The fourth lens has negative focal power, the object side surface S9 of the fourth lens is convex, and the image side surface S10 of the fourth lens is concave. The fifth lens has positive focal power, the object side surface S11 of the fifth lens is concave, and the image side surface S12 of the fifth lens is convex. The sixth lens has positive focal power, the object side surface S13 of the sixth lens is convex, and the image side surface S14 of the sixth lens is concave. The seventh lens has negative power, the object side surface S15 of the seventh lens is concave, and the image side surface S16 of the seventh lens is convex. The eighth lens has negative power, the object side surface S17 of the eighth lens is concave, and the image side surface S18 of the eighth lens is concave.

[0180] Table 17 shows a basic structural parameter table of the optical imaging lens of Example 8, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0181]

[0182]

[0183] Table 17

[0184] Table 18 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 that can be used for the aspheric mirror surfaces S1-S18 in Example 8.

[0185]

[0186]

[0187] Table 18

[0188] Fig.40 The axial chromatic aberration curve of the optical imaging lens of Example 8 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.41 The astigmatism curve of the optical imaging lens of Example 8 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.42 The distortion curve of the optical imaging lens of Example 8 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.43 The magnification chromatic aberration curve of the optical imaging lens of Example 8 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0189] according to Figure 40 to Figure 43 It can be seen that the optical imaging lens provided in Example 8 can achieve good imaging quality.

[0190] In summary, the structural parameters of the optical imaging lenses of Examples 1 to 8 are shown in Table 19. It should be noted that in Examples 3 and 4 in Table 19, f is the focal length of the optical imaging lens at infinity.

[0191] Optical parameters / Examples one two three Four five six seven eight Semi-FOV(°) 42.89 32.60 32.14 31.97 31.00 31.00 31.00 31.00 Imgh 8.20 6.75 6.95 6.95 6.36 6.34 6.44 6.56 Fno 1.20 1.57 1.59 1.59 1.60 1.60 1.60 1.60 f(mm) 8.50 10.50 10.86 10.91 10.50 10.50 10.66 10.83 f1(mm) 24.25 -83.39 -47.05 -46.89 -94.68 -94.84 -79.09 -77.90 f2(mm) -22.29 10.33 11.09 11.09 9.79 9.73 10.01 9.99 f3(mm) 7.73 12.15 12.13 12.11 13.56 13.69 12.66 12.49 f4(mm) -23.06 -7.54 -8.74 -8.73 -8.13 -8.16 -8.06 -7.90 f5(mm) -146.68 22.83 25.82 25.74 18.11 17.58 20.07 19.39 f6(mm) -17.73 56.86 6010.18 4334.49 100.25 165.04 71.12 62.14 f7(mm) 6.76 -69.83 124.93 122.65 -289.10 -184.60 -98.88 -91.34 f8(mm) -7.10 -14.05 -16.43 -16.07 -12.96 -13.56 -13.61 -13.64 YC82(mm) 2.61 3.73 3.89 3.87 3.28 3.27 3.29 3.24

[0192] Table 19

[0193] In summary, Embodiments 1 to 8 respectively satisfy the relationship shown in Table 20.

[0194] Conditional formula\Example one two three Four five six seven eight f6 / f7 -2.62 -0.81 48.11 35.34 -0.35 -0.89 -0.72 -0.68 TTL / Imgh*FNO 3.04 5.76 6.22 6.24 6.04 6.22 6.17 6.06 f3 / f 0.91 1.16 1.12 1.11 1.29 1.30 1.19 1.15 f4 / f5 0.16 -0.33 -0.34 -0.34 -0.45 -0.46 -0.40 -0.41 P / (PL+PR) 16.76 3.59 3.82 3.86 4.73 4.72 3.92 4.91 (CT7+CT8) / (CT5+CT6) 2.48 1.43 2.02 1.94 1.53 1.81 1.65 1.53 TTL / (P*NP) 1.37 1.76 1.89 1.89 1.72 1.72 1.73 1.73 (R3+R4) / (R3-R4) -3.72 -0.31 -0.39 -0.39 -0.26 -0.26 -0.24 -0.25 DT12 / DT22 1.31 1.75 1.66 1.66 1.64 1.62 1.63 1.63 (T78+T67) / (T56+T45) 1.58 2.11 1.24 1.24 1.96 1.86 1.88 1.96 (DT61+DT62) / (DT51+DT52) 1.10 1.13 0.94 0.95 0.95 0.94 0.95 0.96 |f1 / f8| 3.42 5.94 2.86 2.92 7.31 7.00 5.81 5.71 T28 / P 1.21 1.54 1.72 1.73 1.50 1.48 1.53 1.55 YC82 / CT8 4.29 2.22 2.66 2.64 2.06 2.01 1.95 1.90 f1 / f2 -1.09 -8.07 -4.24 -4.23 -9.67 -9.75 -7.90 -7.80

[0195] Table 20

[0196] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0197] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0198] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0199] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0200] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An optical imaging lens, It is characterized in that It consists of a prism and eight lenses with optical power. The eight lenses with optical power include, from the object side to the image side, a first lens, a second lens, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens, a sixth lens, a seventh lens and an eighth lens with negative optical power, the image side surface of the eighth lens has at least one inflection point, and an air gap is provided between two adjacent lenses of the eight lenses; The prism is located between the first lens and the imaging surface of the optical imaging lens, and the prism has an incident surface, a reflection surface and an exit surface; The distance TTL from the object side of the first lens to the imaging surface on the optical axis, half of the image height Imgh corresponding to the maximum field of view of the optical imaging lens, and the aperture number FNO of the optical imaging lens satisfy the following conditions: 2.9 <TTL / Imgh*FNO<6.4; The effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy -10.0 <f1 / f2<-0.9; The effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: -0.6 <f4 / f5<0.2; The effective focal length f of the optical imaging lens and the effective focal length f3 of the third lens satisfy: 0.8 <f3 / f<1.5; A distance P from the incident surface of the prism to the exit surface of the prism on the optical axis satisfies: P>7.0mm.

2. The optical imaging lens according to claim 1, It is characterized in that The effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -2.8 <f6 / f7<48.2。 3. The optical imaging lens according to claim 2, It is characterized in that The optical imaging lens can switch between infinity and macro, and the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy the following relationship: 35.2 <f6 / f7<48.2。 4. The optical imaging lens according to claim 1, It is characterized in that The incident surface of the prism is a spherical surface or an aspherical surface, and the exit surface of the prism is a spherical surface or an aspherical surface, The distance P from the incident surface of the prism to the exit surface of the prism on the optical axis, the air gap PL on the optical axis between the prism and the lens closest to the incident surface of the prism, and the air gap PR on the optical axis between the prism and the lens closest to the exit surface of the prism satisfy: 3.4 <P / (PL+PR)<16.8。 5. The optical imaging lens according to claim 1, It is characterized in that The center thickness CT7 of the seventh lens, the center thickness CT8 of the eighth lens, the center thickness CT5 of the fifth lens and the center thickness CT6 of the sixth lens satisfy the following: 1.4<(CT7+CT8) / (CT5+CT6)<2.

6.

6. The optical imaging lens according to claim 1, It is characterized in that The distance TTL from the object side of the first lens to the imaging surface on the optical axis, the distance P from the incident surface of the prism to the exit surface of the prism on the optical axis and the refractive index NP of the prism satisfy: 1.2 <TTL / (P*NP)<2.0。 7. The optical imaging lens according to claim 1, It is characterized in that The image side surface of the second lens is a convex surface, and 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: -3.8<(R3+R4) / (R3-R4)<0.

8. The optical imaging lens according to claim 1, It is characterized in that The maximum effective half-aperture DT12 of the image side of the first lens and the maximum effective half-aperture DT22 of the image side of the second lens satisfy: 1.2 <DT12 / DT22<2.0。 9. The optical imaging lens according to claim 1, It is characterized in that When the optical imaging lens is at infinity, the air gap T78 between the seventh lens and the eighth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following conditions: 1.1<(T78+T67) / (T56+T45)<2.

2.

10. The optical imaging lens according to claim 1, It is characterized in that The maximum effective half-aperture DT61 of the object side surface of the sixth lens, the maximum effective half-aperture DT62 of the image side surface of the sixth lens, the maximum effective half-aperture DT51 of the object side surface of the fifth lens and the maximum effective half-aperture DT52 of the image side surface of the fifth lens satisfy the following: 0.8<(DT61+DT62) / (DT51+DT52)<1.

2.

11. The optical imaging lens according to any one of claims 1 to 10, It is characterized in that The effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens satisfy 3.2<|f1 / f8|<7.

5.

12. The optical imaging lens according to any one of claims 1 to 10, It is characterized in that When the optical imaging lens is in the infinite distance state, the distance T28 from the object side of the second lens to the image side of the eighth lens on the optical axis and the distance P from the incident surface of the prism to the exit surface of the prism on the optical axis satisfy: 1.0 <T28 / P<2.0。 13. The optical imaging lens according to any one of claims 1 to 10, It is characterized in that The distance YC82 from the inflection point closest to the optical axis on the image side of the eighth lens to the optical axis and the center thickness CT8 of the eighth lens satisfy the following relationship: 1.8 <YC82 / CT8<4.4。

Images