Optical lens, camera module and electronic device

Abstract

An optical lens, a camera module and an electronic device are provided with five lenses with refractive power, and the five lenses include a first lens, a second lens, an optical element, a third lens, a fourth lens and a fifth lens in sequence from an object side to an image side along an optical axis. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region. The second lens element with negative refractive power has an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region. The third lens element has an object-side surface being concave in a paraxial region and an image-side surface being convex in a paraxial region. The fourth lens element has an object-side surface being concave in a paraxial region and an image-side surface being convex in a paraxial region. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. According to the optical lens, the imaging quality can be ensured while the miniaturization design is met, the characteristic of large aperture of the optical lens can be ensured, and the optical lens has the characteristics of high pixel and high definition.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and particularly to an optical lens, a camera module, and an electronic device. Background Art

[0002] With the development of optical imaging technology, optical lenses are widely used in mobile electronic devices. At the same time, as mobile electronic devices show a trend of miniaturization, thinness, and lightness, the requirements for the miniaturized design of optical lenses are also getting higher and higher. However, when the size of the electronic device becomes smaller, the light incident amount of the optical lens will also be limited, thus unable to ensure the imaging quality. Summary of the Invention

[0003] In view of the above, it is necessary to provide an optical lens, a camera module, and an electronic device to ensure the imaging quality while meeting the miniaturized design requirements.

[0004] In the first aspect of the embodiments of this application, an optical lens is provided. There are a total of five lenses with refractive power, which sequentially include a first lens, a second lens, an optical element, a third lens, a fourth lens, and a fifth lens along the optical axis from the object side to the image side; the first lens and the second lens form a first lens group, the third lens, the fourth lens, and the fifth lens form a second lens group, the first lens group and the optical element are fixed relative to the imaging surface of the optical lens, and the second lens group moves along the optical axis direction between the optical element and the imaging surface of the optical lens; the first lens has a positive refractive power, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis; the second lens has a negative refractive power, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis; the third lens has a refractive power, its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis; the fourth lens has a refractive power, its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis; the fifth lens has a negative refractive power, its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis; the optical lens satisfies the following relational expressions: 2.7 ≤ FNO < 3.4; 18° < FOV < 25°; where, FNO is the aperture number of the optical lens, and FOV is the maximum field of view angle of the optical lens.

[0005] The above optical lens is configured such that the first lens has a positive refractive power, with its object side being convex near the optical axis and its image side being concave near the optical axis, which is conducive to the incidence and convergence of light rays within a large field of view; the second lens has a negative refractive power, with its object side being convex near the optical axis and its image side being concave near the optical axis, which helps correct the aberration generated by the front lens; the third lens has a refractive power, with its object side being concave near the optical axis and its image side being convex near the optical axis, which is conducive to delaying the light rays incident from the front-end lens into the optical lens, thereby delaying the incident angle of the light rays; the fourth lens has a refractive power, with its object side being concave near the optical axis and its image side being convex near the optical axis, which can suppress the light ray exit angle and is also conducive to the incidence of light rays within a large range onto the imaging surface; the fifth lens has a negative refractive power, with its object side being concave near the optical axis and its image side being convex near the optical axis, which is conducive to enabling the optical lens to have a reasonable edge inclination angle, reducing the design pressure of the mechanical part, and avoiding the occurrence of stray light. By arranging the first lens group in front of the optical element, through the synergistic effect of the positive and negative refractive power lenses inside it, the incident light rays can be preliminarily converged and diverged, optimizing the beam angle and size entering the optical element; by arranging an optical element between the first lens group and the second lens group, and setting the second lens group to move along the optical axis direction between the optical element and the imaging surface of the optical lens, the focusing clarity of the optical lens can be adjusted, such that the total length of the optical lens remains unchanged during the focusing process, thereby achieving the focusing function of the optical lens while meeting the miniaturization design requirements of the optical lens and ensuring the imaging quality.

[0006] Furthermore, by making the optical lens satisfy 2.7 ≤ FNO < 3.4, the optical lens can be ensured to have the characteristic of a large aperture, allowing the optical lens to have sufficient light input, making the captured image clearer, and enabling the capture of object space scenes with low light brightness such as high-quality night scenes and starry skies. By making the optical lens satisfy 18° < FOV < 25°, the optical lens can be made to have a telephoto characteristic, thereby enabling the optical lens to have the characteristics of high pixels and high clarity, ensuring the imaging quality.

[0007] In the second aspect of the embodiments of the present application, a camera module is provided, including: the above optical lens; and an image sensor disposed on the image side of the optical lens.

[0008] In the above camera module, by incorporating the optical lens provided in the embodiments of the present invention and arranging the various lenses in the optical lens in a compact spatial layout, the imaging quality can be ensured while meeting the miniaturization design requirements.

[0009] In the third aspect of the embodiments of the present application, an electronic device is provided, including: a housing; and the above camera module, where the camera module is mounted on the housing.

[0010] By incorporating the camera module provided in the embodiments of the present invention into the above-mentioned electronic device, and by arranging the lenses in the optical lens of the camera module in a compact spatial manner, imaging quality can be guaranteed while satisfying miniaturization design. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an optical lens according to an embodiment of this application.

[0012] Figure 2 This is a schematic diagram of the optical lens in the telephoto state according to the first embodiment of this application.

[0013] Figure 3 These are the longitudinal spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens of the first embodiment of this application in the telephoto state.

[0014] Figure 4 This is a schematic diagram of the optical lens in the near-focus state according to the first embodiment of this application.

[0015] Figure 5 These are the longitudinal spherical aberration diagram, astigmatism curve diagram, and distortion curve diagram of the optical lens of the first embodiment of this application in a near-focus state.

[0016] Figure 6 This is a schematic diagram of the optical lens in the telephoto state according to the second embodiment of this application.

[0017] Figure 7 The diagrams show the longitudinal spherical aberration, astigmatism, and distortion of the optical lens in the telephoto state according to the second embodiment of this application.

[0018] Figure 8 This is a schematic diagram of the optical lens in the telephoto state according to the third embodiment of this application.

[0019] Figure 9 The diagrams show the longitudinal spherical aberration, astigmatism, and distortion of the optical lens in the telephoto state according to the third embodiment of this application.

[0020] Figure 10 This is a schematic diagram of the optical lens in the telephoto state according to the fourth embodiment of this application.

[0021] Figure 11 The diagrams show the longitudinal spherical aberration, astigmatism, and distortion of the optical lens in the telephoto state according to the fourth embodiment of this application.

[0022] Figure 12 This is a schematic diagram of the optical lens in the telephoto state according to the fifth embodiment of this application.

[0023] Figure 13 The diagrams show the longitudinal spherical aberration, astigmatism, and distortion of the optical lens in the telephoto state according to the fifth embodiment of this application.

[0024] Figure 14 This is a schematic diagram of the structure of the camera module according to an embodiment of this application.

[0025] Figure 15 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0026] Explanation of key component symbols: Optical lens 100, optical element PR, incident surface PR1, reflecting surface PR2, exit surface PR3, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, object side surface S1, S3, S5, S7, S9, image side surface S2, S4, S6, S8, S10, first lens group G1, second lens group G2, aperture STO, filter IR, imaging surface IMG, camera module 200, image sensor 201, electronic device 300, housing 301. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] Please see Figure 1 The first aspect of this application provides an optical lens 100, which has five lenses with refractive power, and includes a first lens L1, a second lens L2, an optical element PR, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence along the optical axis from the object side to the image side.

[0029] The first lens L1 and the second lens L2 constitute the first lens group G1, and the third lens L3, the fourth lens L4 and the fifth lens L5 constitute the second lens group G2. The first lens group G1 and the optical element PR are fixed relative to the imaging surface IMG of the optical lens 100, and the second lens group G2 moves along the optical axis between the optical element PR and the imaging surface IMG of the optical lens 100.

[0030] The first lens L1 has positive refractive power; its object-side surface S1 is convex near the optical axis, and its image-side surface S2 is concave near the optical axis. The second lens L2 has negative refractive power; its object-side surface S3 is convex near the optical axis, and its image-side surface S4 is concave near the optical axis. The third lens L3 has refractive power; its object-side surface S5 is concave near the optical axis, and its image-side surface S6 is convex near the optical axis. The fourth lens L4 has refractive power; its object-side surface S7 is concave near the optical axis, and its image-side surface S8 is convex near the optical axis. The fifth lens L5 has negative refractive power; its object-side surface S9 is concave near the optical axis, and its image-side surface S10 is convex near the optical axis.

[0031] The above optical lens 100 is configured such that the first lens L1 has a positive refractive power, with its object side S1 being convex near the optical axis and its image side S2 being concave near the optical axis, which is conducive to the incidence and convergence of light rays within a large field of view; the second lens L2 has a negative refractive power, with its object side S3 being convex near the optical axis and its image side S4 being concave near the optical axis, which helps to correct the aberration generated by the front lens; the third lens L3 has a refractive power, with its object side S5 being concave near the optical axis and its image side S6 being convex near the optical axis, which is beneficial for delaying the light rays incident from the front-end lens into the optical lens 100, thereby delaying the incident angle of the light rays; the fourth lens L4 has a refractive power, with its object side S7 being concave near the optical axis and its image side S8 being convex near the optical axis, which can suppress the light ray exit angle and is also conducive to the incidence of light rays within a large range onto the imaging surface IMG; the fifth lens L5 has a negative refractive power, with its object side S9 being concave near the optical axis and its image side S10 being convex near the optical axis, which is beneficial for enabling the optical lens 100 to have a reasonable edge inclination angle, reducing the design pressure of the mechanical part, and avoiding the occurrence of stray light. By arranging the first lens group G1 in front of the optical element PR, through the cooperative action of the positive and negative refractive power lenses inside it, the incident light rays can be preliminarily converged and diverged for regulation, optimizing the beam angle and size entering the optical element PR; by arranging the optical element PR between the first lens group G1 and the second lens group G2, and setting the second lens group G2 to move along the optical axis direction between the optical element PR and the imaging surface IMG of the optical lens 100, the focusing clarity of the optical lens 100 can be adjusted, such that the total length of the optical lens 100 remains unchanged during the focusing process, thereby achieving the focusing function of the optical lens 100 while meeting the miniaturization design requirements of the optical lens 100 and ensuring the imaging quality.

[0032] Furthermore, the optical lens 100 satisfies the following relationship: 2.7 ≤ FNO < 3.4; for example, FNO is 2.71, 2.91, 3.01, 3.21, 3.39, etc. Here, FNO is the f-number of the optical lens 100. By making the optical lens 100 satisfy the above relationship, it can be ensured that the optical lens 100 has the characteristic of a large aperture, enabling the optical lens 100 to have sufficient light input, making the captured images clearer, and achieving the shooting of object space scenes with low light brightness such as high-quality night scenes and starry skies.

[0033] At the same time, the optical lens 100 satisfies the following relationship: 18° < FOV < 25°; for example, FOV is 18.1°, 20.1°, 22.1°, 23.1°, 24.9°, etc. Here, FOV is the maximum field of view angle of the optical lens 100. By making the optical lens 100 satisfy the above relationship, the optical lens 100 can have the characteristic of a long focal length, thereby enabling the optical lens 100 to have the characteristics of high pixels and high clarity.

[0034] In some embodiments, the optical lens 100 satisfies the following relationship: 4.8 < TTL / ImgH < 5.9; for example, TTL / ImgH is 4.81, 5.1, 5.3, 5.7, 5.89, etc. Here, TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis, and ImgH is half of the image height corresponding to the maximum viewing angle of the optical lens 100. By making the optical lens 100 satisfy the above relationship, it is beneficial to improve the resolution of the optical lens 100 in the full viewing field and improve the imaging quality of the edge viewing field; at the same time, the optical lens 100 can have an ultra-thin characteristic, which is beneficial for the optical lens 100 to have a smaller optical length, and has more advantages in shooting medium focal length distance scenes and miniaturizing the camera module.

[0035] In some embodiments, the optical lens 100 satisfies the following relationship: 1.03 ≤ TTL / fz1 < 1.06; for example, TTL / fz1 is 1.03, 1.031, 1.035, 1.04, 1.045, 1.059, etc. Here, fz1 is the effective focal length of the optical lens 100 in the telephoto state. By making the optical lens 100 satisfy the above relationship, by reasonably configuring the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis and the effective focal length of the optical lens 100 in the telephoto state, the optical lens 100 can have a smaller optical length, achieve the characteristic of miniaturization, and also make the optical lens 100 have a better telephoto effect.

[0036] In some embodiments, the optical lens 100 satisfies the following relationship: 3.6 < TTL / P1 < 4.3; for example, TTL / P1 is 3.61, 3.81, 3.9, 4.15, 4.29, etc. Here, P1 is the distance from the incident surface PR1 to the exit surface PR3 of the optical element PR on the optical axis in the telephoto state. By making the optical lens 100 satisfy the above relationship, it is ensured that the size of the optical element PR is not too large, avoiding the increase of the total lens length due to the too long optical path of the optical element PR, which is beneficial to maintaining the miniaturized design; and, it can prevent the optical element PR from being too short and compressing the moving space of the second lens group G2, ensuring sufficient image distance adjustment margin during the zooming process, and at the same time avoiding the too large deflection angle of the optical path caused by the too short optical element PR resulting in the deterioration of astigmatism or distortion; further, this ratio range coordinates the layout of the front fixed part and the rear moving part, making the optical path folding of the optical element PR match the refractive power distribution of the lens group, taking into account the wide-angle characteristic and the focusing stability.

[0037] In some embodiments, the optical lens 100 satisfies the following relationship: 2.8 < TTL / fz1*FNOz1 < 3.4; for example, TTL / f*FNO is 2.81, 2.9, 3.1, 3.2, 3.39, etc. Here, FNOz1 is the aperture number of the optical lens 100 in the telephoto state. By making the optical lens 100 satisfy the above relationship, the collaborative design of the aperture size and focal length in the telephoto state is constrained, ensuring sufficient light intake while avoiding too large an aperture resulting in too shallow depth of field or increased aberration correction pressure, and also avoiding unbalanced distribution of lens refractive power due to excessive compression of the length of the optical lens 100, thus affecting aberration correction; and restricting the total length of the optical lens 100 to prevent it from being difficult to adapt to miniaturized devices due to a long structure, achieving an optimized balance among the volume, light intake, and imaging performance of the optical lens 100.

[0038] In some embodiments, the optical lens 100 satisfies the following relationship: 3.4 < fz1 / R11 < 4; for example, fz1 / R11 is 3.41, 3.5, 3.6, 3.8, 3.9, etc. Here, R11 is the curvature radius of the object side surface S1 of the first lens L1 at the optical axis. In some embodiments, the optical lens 100 satisfies the following relationship: 1 < R12 / fz1 < 1.8; for example, R12 / fz1 is 1.01, 1.2, 1.4, 1.6, 1.78, 1.79, etc. Here, R12 is the curvature radius of the image side surface S1 of the first lens L1 at the optical axis. By making the optical lens 100 satisfy at least one of the above relationships, it is beneficial to maintain the astigmatism of the first lens L1 within a reasonable range, enabling the optical lens 100 to have good imaging quality.

[0039] In some embodiments, the optical lens 100 satisfies the following relationship: 3.7 < fz1 / R21 < 5.4; for example, fz1 / R21 is 3.71, 3.9, 4.5, 5.1, 5.39, etc. Here, R21 is the curvature radius of the object side surface S3 of the second lens L2 at the optical axis. In some embodiments, the optical lens 100 satisfies the following relationship: 5.4 < fz1 / R22 < 6.7; for example, fz1 / R22 is 5.41, 5.7, 6.2, 6.45, 6.69, etc. Here, R22 is the curvature radius of the image side surface S4 of the second lens L2 at the optical axis. By making the optical lens 100 satisfy at least one of the above relationships, it is beneficial to maintain the astigmatism of the second lens L2 within a reasonable range and effectively balance the astigmatism generated by the first lens L1, enabling the optical lens 100 to have good imaging quality.

[0040] In some embodiments, the optical lens 100 satisfies the following relationship: 5.7 < fz1 / R31 < 7.1; for example, fz1 / R31 is 5.71, 5.9, 6.3, 6.6, 6.99, 7.0, etc. Here, R31 is the curvature radius of the object side surface S5 of the third lens L3 at the optical axis. In some embodiments, the optical lens 100 satisfies the following relationship: 4.4 < fz1 / R32 < 7.8; for example, fz1 / R32 is 4.401, 5.51, 6, 6.1, 6.3, 6.5, 6.6, 6.79, 7.79, etc. Here, R32 is the curvature radius of the image side surface S6 of the third lens L3 at the optical axis. By making the optical lens 100 satisfy at least one of the above relationships, it is beneficial to maintain the surface shape of the third lens L3 within a reasonable range and effectively balance the aberration generated by the first lens L1 and the second lens L2, so that the optical lens 100 has good imaging quality.

[0041] In some embodiments, the optical lens 100 satisfies the following relationship: 0.5 < fz1 / R41 < 4.4; for example, fz1 / R41 is 0.51, 1, 2, 3, 4.39, etc. Here, R41 is the curvature radius of the object side surface S7 of the fourth lens L4 at the optical axis. In some embodiments, the optical lens 100 satisfies the following relationship: 1.6 < fz1 / R42 < 4; for example, fz1 / R42 is 1.61, 2, 3, 3.5, 3.9, etc. Here, R42 is the curvature radius of the image side surface S8 of the fourth lens L4 at the optical axis. By making the optical lens 100 satisfy at least one of the above relationships, it is beneficial to maintain the surface shape of the fourth lens L4 within a reasonable range and balance the distortion generated by the first lens L1, the second lens L2 and the third lens L3, so that the optical lens 100 has good imaging quality.

[0042] In some embodiments, the optical lens 100 satisfies the following relationship: 1 < fz1 / R51 < 2.4; for example, fz1 / R51 is 1.1, 1.5, 2, 2.1, 2.39, etc. Here, R51 is the curvature radius of the object side surface S9 of the fifth lens L5 at the optical axis. In some embodiments, the optical lens 100 satisfies the following relationship: 0.6 < R52 / fz1 < 2.4; for example, R52 / fz1 is 0.61, 1, 1.5, 2, 2.39, etc. Here, R52 is the curvature radius of the image side surface S10 of the fifth lens L5 at the optical axis. Satisfying at least one of the above relationships is beneficial to maintaining the refractive power of the fifth lens L5 within a reasonable range, avoiding excessive refractive power of the fifth lens L5, gently receiving the light from the object side, so that the optical lens 100 has good imaging quality.

[0043] In some embodiments, the optical lens 100 satisfies the following relational expression: 4.1 < R12 / R11 < 6.4; for example, R12 / R11 is 4.11, 4.5, 5, 5.5, 6.39, etc. By making the optical lens 100 satisfy the above relational expression, it is beneficial to control the shape and curvature of the first lens L1, thereby effectively reducing the aberration introduction value of the incident light, promoting the aberration balance of the optical lens 100. At the same time, it can also reduce the processing difficulty of the first lens L1, which is beneficial to the manufacturing and shaping of the first lens L1, and improves the processing technology of the optical lens 100.

[0044] In some embodiments, the optical lens 100 satisfies the following relational expression: 1.2 < R21 / R22 < 1.5; for example, R21 / R22 is 1.21, 1.3, 1.4, 1.45, 1.49, etc. By making the optical lens 100 satisfy the above relational expression, by adjusting the curvature radius of the second lens L2, the spherical aberration and astigmatism of the optical lens 100 can be effectively corrected. At the same time, the sensitivity of the second lens L2 can be reduced, and the influence of the field curvature during the focusing process of the optical lens 100 at different object distances can be reduced, improving the imaging quality.

[0045] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.9 < R32 / R31 < 1.5; for example, R32 / R31 is 0.91, 1, 1.2, 1.4, 1.49, etc. By making the optical lens 100 satisfy the above relational expression, in combination with the surface shape of the third lens L3, the curvature radius and surface shape of the object side S5 and the image side S6 of the third lens L3 can be optimized, which is beneficial to the reasonable cooperation of the positive refractive power of the third lens L3 with the negative refractive power of the first lens L1 and the second lens L2. Thus, the on-axis spherical aberration of the entire optical lens 100 is reduced, and at the same time, it is beneficial to correct the optical path direction from the third lens L3 to the fourth lens L4, thereby reducing the generation of optical distortion.

[0046] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.6 < R41 / R42 < 5; for example, R41 / R42 is 0.61, 1, 2, 3, 4.9, etc. By making the optical lens 100 satisfy the above relational expression, it is beneficial to correct the aberration generated by the optical lens 100, making the refractive power configuration of each lens of the optical lens 100 uniform in the direction perpendicular to the optical axis, greatly correcting the distortion and aberration generated by the front lens, and at the same time avoiding excessive bending of the fourth lens L4, which is easy to form and manufacture.

[0047] In some embodiments, the optical lens 100 satisfies the following relationship: 1.5 < R52 / R51 < 3.8; for example, R52 / R51 is 1.51, 2, 3, 3.5, 3.79, etc. By making the optical lens 100 satisfy the above relationship, the surface shape of the fifth lens L5 can be reasonably controlled, the contribution of the astigmatism of the fifth lens L5 can be effectively controlled, the imaging quality of the middle field of view can be guaranteed, it is beneficial to correct the aberration of the optical lens 100, ensure the balance of the distortion amount of the optical lens 100. At the same time, it is avoided that the surface shapes of the object side S9 and the image side S10 of the fifth lens L5 are too curved at the optical axis, which is beneficial to reducing the processing difficulty of the fifth lens L5 and improving the yield rate of the fifth lens L5.

[0048] In some embodiments, the optical lens 100 satisfies the following relationship: 1.7 < fz1 / f1 < 2.8; for example, fz1 / f1 is 1.71, 1.9, 2.1, 2.5, 2.79, etc. Where, f1 is the effective focal length of the first lens L1. By making the optical lens 100 satisfy the above relationship, the ratio of the focal length of the first lens L1 to the focal length of the optical lens 100 in the telephoto state can be reasonably configured. For the entire optical lens 100, the refractive power of the first lens L1 is not too strong, avoiding introducing too much spherical aberration, and making the optical lens 100 have good imaging quality.

[0049] In some embodiments, the optical lens 100 satisfies the following relationship: 0.6 < fz1 / |f2| < 4.5; for example, fz1 / |f2| is 0.61, 1, 2, 3, 4.49, etc. Where, f2 is the effective focal length of the second lens L2. By making the optical lens 100 satisfy the above relationship, it is beneficial to reduce the deflection angle of the light rays in the second lens L2, and at the same time make the negative refractive power provided by the second lens L2 effectively balance the spherical aberration of the optical lens 100, effectively correct the aberration to achieve good imaging quality. At the same time, it is also beneficial to reasonably configure the central thickness of the second lens L2, thereby shortening the total length of the optical lens 100. In addition, it is beneficial to expand the field angle of the optical lens 100.

[0050] In some embodiments, the optical lens 100 satisfies the following relationship: 0.8 < |f3| / fz1 < 4.7; for example, |f3| / fz1 is 0.81, 1, 2.5, 3.5, 4.69, etc. Where, f3 is the effective focal length of the third lens L3. By making the optical lens 100 satisfy the above relationship, it is beneficial to balance the spherical aberration generated by the second lens L2, and can effectively correct the off-axis aberration of the optical lens 100, thereby improving the imaging quality.

[0051] In some embodiments, the optical lens 100 satisfies the following relationship: 0.6 < |f4| / fz1 < 6.4; for example, |f4| / fz1 is 0.61, 2, 4, 5.5, 6.39, etc. Here, f4 is the effective focal length of the fourth lens L4. By making the optical lens 100 satisfy the above relationship, it can be used to adjust the overall refractive power of the optical lens 100, balance the distortion generated by the first lens L1, the second lens L2, and the third lens L3, and avoid high-order aberrations caused by excessive refractive index, thereby improving the imaging quality of the optical lens 100.

[0052] In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < |f5| / fz1 < 2.7; for example, |f5| / fz1 is 1.21, 1.5, 2.1, 2.5, 2.69, etc. Here, f5 is the effective focal length of the fifth lens L5. By making the optical lens 100 satisfy the above relationship, the exit angle of the light after being refracted by the lens group can be reduced, so that the incident angle of the light entering the photosensitive chip on the image side of the optical lens 100 can be reduced, and further improve the photosensitive performance of the photosensitive chip.

[0053] In some embodiments, the optical lens 100 satisfies the following relationship: 13 < f12 / PrL < 16.4; for example, f12 / PrL is 13.1, 14, 15, 15.7, 16.39, etc. Here, f12 is the combined effective focal length of the first lens L1 and the second lens L2, and PrL is the distance on the optical axis from the exit surface PR3 of the optical element PR in the telephoto state to the object side surface S5 of the third lens L3. By making the optical lens 100 satisfy the above relationship, the connection distance between the exit light path of the optical element PR and the second lens group G2 is restricted, avoiding the limitation of the rear group focusing stroke caused by the excessive length of the optical element PR, or the steep increase of the light incident angle caused by the too short optical element PR, which increases astigmatism or distortion. While ensuring the clarity of the edge field of view during wide-angle shooting, it takes into account the image plane stability during the zoom process and the compactness of the overall structure.

[0054] In some embodiments, the optical lens 100 satisfies the following relationship: 1.3 < ImgH / SD52 < 1.9; for example, ImgH / SD52 is 1.31, 1.45, 1.6, 1.75, 1.89, etc. Here, SD52 is half of the maximum effective aperture of the image side surface S6 of the fifth lens L5. By making the optical lens 100 satisfy the above relationship, the fifth lens L5 matches the size of the half image height, thereby controlling the aperture of the fifth lens L5 to balance the illuminance, the field angle, and the overall optical length. If it exceeds the upper or lower limit of the above relationship, the maximum effective aperture of the fifth lens L5 is too large or too small, which will cause a large step difference between each lens and the imaging surface IMG, which is not conducive to the assembly of the optical lens 100 and the bearing design between each lens.

[0055] In some embodiments, the optical lens 100 satisfies the following relationship: 1.1 < SD11 / SD52 < 1.7; for example, SD11 / SD52 is 1.11, 1.3, 1.45, 1.55, 1.69, etc. Here, SD11 is half of the maximum effective aperture of the object side S1 of the first lens L1. By making the optical lens 100 satisfy the above relationship, it can ensure that the apertures of the object side S1 of the first lens L1 and the image side S10 of the fifth lens L5 are within a suitable range, thereby controlling the aperture of the first lens L1. While the optical lens 100 has a large viewing angle, it can also effectively reduce the depth of the viewpoint of the entire optical lens 100.

[0056] In some embodiments, the optical lens 100 satisfies the following relationship: 1.57 < SDmax / SDmin < 2.2; for example, SDmax / SDmin is 1.571, 1.7, 1.8, 2.0, 2.19, etc. Here, SDmax is the maximum effective semi-aperture of the optical lens 100, and SDmin is the minimum effective semi-aperture of the optical lens 100. By making the optical lens 100 satisfy the above relationship, the ratio of the maximum value to the minimum value of the maximum effective semi-apertures of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 is reasonably configured, avoiding too large differences in the apertures of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 of the optical lens 100, thereby increasing the forming sensitivity of the optical lens 100 and reducing the stability.

[0057] In some embodiments, the optical lens 100 satisfies the following relationship: 1.1 < ImgH / SDmax < 1.18; for example, ImgH / SDmax is 1.11, 1.13, 1.15, 1.16, 1.179, etc. By making the optical lens 100 satisfy the above relationship, the matching relationship between the image plane size and the lens aperture is constrained, enabling the light rays in the edge field of view to fully enter the imaging plane IMG, not only improving the resolution of the edge image, but also maintaining the uniformity of the overall image plane illuminance, avoiding vignetting or deterioration of the edge image quality. Moreover, a wider field of view coverage can be achieved without significantly increasing the lens aperture, especially suitable for meeting the requirements of balancing wide-angle shooting and imaging brightness in a limited space for miniaturized lenses.

[0058] In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < TDz1 / BLz1 < 2.1; for example, TDz1 / BLz1 is 1.21, 1.3, 1.5, 1.7, 1.85, 2.09, etc. Here, TDz1 is the distance on the optical axis from the object side surface S1 of the first lens L1 to the image side surface S10 of the fifth lens L5 in the telephoto state, and BLz1 is the distance on the optical axis from the image side surface S10 of the fifth lens L5 to the imaging surface IMG of the optical lens 100 in the telephoto state. By making the optical lens 100 satisfy the above relationship, it is beneficial to ensure that there is a sufficient focusing range for the assembly of the image side surface S10 of the fifth lens L5 and the image sensor while maintaining the miniaturization of the optical lens 100. When exceeding the upper limit of the relationship, the back focal length of the optical lens 100 is too large, and it is difficult to shorten the total length of the optical lens 100, which is not conducive to maintaining miniaturization; when lower than the lower limit of the relationship, the distance on the optical axis from the image side surface S of the fifth lens L5 to the imaging surface IMG of the optical lens 100 (i.e., the back focal length of the optical lens 100) is too short, which easily causes the incident angle of light reaching the imaging surface IMG to be too large, affecting the efficiency of the image sensor to receive light and reducing the imaging quality.

[0059] In some embodiments, the optical lens 100 satisfies the following relationship: 1.1 < TDz2 / TDz1 < 1.2; for example, TDz2 / TDz1 is 1.11, 1.13, 1.15, 1.17, 1.199, etc. Here, TDz2 is the distance on the optical axis from the object side surface S1 of the first lens L1 to the image side surface S10 of the fifth lens L5 in the near - focus state. By making the optical lens 100 satisfy the above relationship, it is beneficial to balance the distance on the optical axis from the object side surface S1 of the first lens L1 to the image side surface S10 of the fifth lens L5 in the near - focus state and the distance on the optical axis from the object side surface S1 of the first lens L1 to the image side surface S10 of the fifth lens L5 in the telephoto state, and can balance the aberrations of different fields of view and improve the full - frame clarity.

[0060] In some embodiments, the optical lens 100 satisfies the following relationship: 3.2 < TDz1 / ImgH < 3.4; for example, TDz1 / ImgH is 3.211, 3.25, 3.28, 3.35, 3.39, etc. By making the optical lens 100 satisfy the above relationship, it is beneficial to balance the distance on the optical axis from the object side surface S1 of the first lens L1 to the image side surface S10 of the fifth lens L5 and the semi - image height corresponding to the maximum field angle of the optical lens 100, and the optical lens 100 can obtain good thin - and - light properties, with good aberration balance and image quality improvement ability.

[0061] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.92 < GL2 / GL1 < 1.2; for example, GL2 / GL1 is 0.921, 0.98, 1, 1.1, 1.19, etc. Here, GL2 is the distance on the optical axis from the object side surface S5 of the third lens L3 to the image side surface S6 of the fifth lens L5, and GL1 is the distance on the optical axis from the object side surface S1 of the first lens L1 to the image side surface S4 of the second lens L2. By making the optical lens 100 satisfy the above relational expression, it is beneficial to balance the distance on the optical axis from the object side surface S1 of the first lens L1 to the image side surface S4 of the second lens L2 and the distance on the optical axis from the object side surface S5 of the third lens L3 to the image side surface S10 of the fifth lens L5, compress the distance between the first lens L1 and the fifth lens L5, make the layout of the optical lens 100 compact, and is beneficial to realizing the miniaturization of the optical lens 100.

[0062] In some embodiments, the optical lens 100 satisfies the following relational expression: 3.5 < CT1 / CT2 < 4.5; for example, CT1 / CT2 is 3.51, 3.8, 4.1, 4.3, 4.49, etc. Here, CT1 is the thickness of the first lens L1 on the optical axis, and CT2 is the thickness of the second lens L2 on the optical axis. By making the optical lens 100 satisfy the above relational expression, it is beneficial for the thickness of the second lens L2 on the optical axis to be thinner, making it the key lens for correcting the distortion of the marginal field of view and improving the imaging performance, and controlling the ratio of the thickness of the first lens L1 on the optical axis to the thickness of the second lens L2 on the optical axis within a reasonable range, which is beneficial to effectively balance the optical path difference of the optical lens 100, reduce the size of the optical lens 100, and maintain the ultra-thin characteristic of the second lens L2.

[0063] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.5 < CT4 / CT3 < 1.7; for example, CT4 / CT3 is 0.51, 0.9, 6.1, 1.2, 1.5, 1.69, etc. Here, CT3 is the thickness of the third lens L3 on the optical axis, and CT4 is the thickness of the fourth lens L4 on the optical axis. By making the optical lens 100 satisfy the above relational expression, the ratio of the thickness of the third lens L3 on the optical axis to the thickness of the fourth lens L4 on the optical axis can be controlled within a reasonable range, ensuring that when light is transmitted from the third lens L3 to the fourth lens L4, the refraction angle and the convergence path remain coherent and stable, and reducing the aberration superposition caused by the imbalance of the thickness ratio, especially the influence of spherical aberration and field curvature.

[0064] In some embodiments, the optical lens 100 satisfies the following relationship: 0.7 < CT4 / CT5 < 2.1; for example, CT4 / CT5 is 0.71, 0.8, 0.9, 2.0, 2.09, etc. Here, CT5 is the thickness of the fifth lens L5 on the optical axis. By making the optical lens 100 satisfy the above relationship, the ratio of the thickness of the fourth lens L4 on the optical axis to the thickness of the fifth lens L5 on the optical axis can be controlled within a reasonable range, ensuring that when light travels from the fourth lens L4 to the fifth lens L5, the refraction path remains coherent and stable, enhancing the reliability of the optical lens 100 under different working conditions, and enabling the optical lens 100 to always maintain high-definition imaging during the zoom process.

[0065] In some embodiments, the optical lens 100 satisfies the following relationship: 1 < (CT1 + CT2) / (CT3 + CT4 + CT5) < 1.2; for example, (CT1 + CT2) / (CT3 + CT4 + CT5) is 1.01, 1.05, 1.1, 1.15, 1.19, etc. By making the optical lens 100 satisfy the above relationship, the thickness ratio of the front and rear groups of lenses is restricted, enabling the thickness of the front group of lenses (the first lens L1 and the second lens L2) to be coordinated and matched with the thickness of the rear group of zoom lenses, avoiding sudden deflection of the optical path caused by thickness imbalance, thereby reducing the risk of aberrations such as spherical aberration and astigmatism. Moreover, it can ensure that the front group of lenses has a sufficient thickness ratio, avoiding unstable PR support of optical components or sensitivity to assembly tolerances due to the overly thin front group.

[0066] In some embodiments, the optical lens 100 satisfies the following relationship: 3.8 < (CT3 + CT4 + CT5) / (AT34 + AT45) < 10.1; for example, (CT3 + CT4 + CT5) / (AT34 + AT45) is 3.81, 5, 7, 8, 9.9, 10.099, etc. Here, AT34 is the distance on the optical axis between the image side S6 of the third lens L3 and the object side S7 of the fourth lens L4, and AT45 is the distance on the optical axis between the image side S8 of the fourth lens L4 and the object side S9 of the fifth lens L5. By making the optical lens 100 satisfy the above relationship, the movement range of the rear group can be optimized within a limited space, meeting the zoom requirements while avoiding a long structure. Moreover, the balance between the lens thickness and the air gap is restricted, making the power distribution of the rear group of lenses and the light transition smoother, effectively suppressing aberrations such as field curvature and astigmatism caused by sudden changes in the light angle during the zoom process, while maintaining the resolution of the marginal field of view.

[0067] In some embodiments, the optical lens 100 satisfies the following relationship: 1.07 < FOVz1 / FOVz2 < 1.2; for example, FOVz1 / FOVz2 is 1.071, 1.08, 1.11, 1.15, 1.19, etc. Here, FOVz1 is the maximum field of view angle of the optical lens 100 in the telephoto state, and FOVz2 is the maximum field of view angle of the optical lens 100 in the close-focus state. By making the optical lens 100 satisfy the above relationship, the telephoto end can provide a sufficiently wide field of view for shooting large scenes, while the close-focus end can naturally narrow the viewing angle to highlight the subject details, avoiding the compositional discomfort caused by sudden changes in the viewing angle. At the same time, this ratio range ensures that various aberrations of the optical lens 100 are effectively controlled during the zooming process, enabling excellent imaging sharpness and low distortion to be maintained throughout the focal length range, meeting the diverse shooting needs of users from long-distance views to close-ups, and ensuring the miniaturization and lightweight design of the optical lens 100.

[0068] In some embodiments, the optical lens 100 satisfies the following relationship: 1.02 < FNOz2 / FNOz1 < 1.06; for example, FNOz2 / FNOz1 is 1.021, 1.03, 1.04, 1.051, 1.059, etc. Here, FNOz2 is the f-number of the optical lens 100 in the close-focus state, and FNOz1 is the f-number of the optical lens 100 in the telephoto state. By making the optical lens 100 satisfy the above relationship, sufficient light flux can be ensured in both the long-focus and short-focus cases, thereby enabling the optical lens 100 to achieve high-definition imaging.

[0069] In some embodiments, the optical lens 100 satisfies the following relationship: 1.5 < R52 / BLz1 < 6.3; for example, R52 / BLz1 is 1.51, 2, 4, 5.5, 6.299, etc. Here, BLz1 is the distance on the optical axis from the image side S10 of the fifth lens L5 to the imaging surface IMG of the optical lens 100 in the telephoto state. By making the optical lens 100 satisfy the above relationship, the matching relationship between the curvature radius of the image side S10 of the fifth lens L5 and the image surface distance is restricted, enabling the back focal length of the optical lens 100 to adapt to the requirements of image sensor packaging while avoiding an excessive increase in the overall lens length due to an overly long back intercept. Moreover, it can reduce the extreme impact of the surface accuracy of the fifth lens L5 on image quality and improve the assembly tolerance.

[0070] In some embodiments, the optical lens 100 satisfies the following relationship: 7 < |f345| / BLz1 < 27; for example, |f345| / BLz1 is 7.1, 10, 15, 20, 26.9, etc. Here, f345 is the combined effective focal length of the third lens L3, the fourth lens L4, and the fifth lens L5. By making the optical lens 100 satisfy the above relationship, the dynamic balance between the converging ability of the third lens L3 to the fifth lens L5 and the back focal length is constrained, enabling the optical lens 100 to maintain a stable image plane position during the zooming process and effectively suppressing spherical aberration or field curvature caused by unbalanced light power distribution. Especially in the optical element PR folding structure, this design can compensate for the aberration introduced by the optical path deflection.

[0071] In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < BLz2 / BLz1 < 1.4; for example, BLz2 / BLz1 is 1.21, 1.25, 1.3, 1.35, 1.39, etc. Here, BLz2 is the distance from the image side surface S10 of the fifth lens L5 in the near-focus state to the imaging plane IMG of the optical lens 100 on the optical axis. By making the optical lens 100 satisfy the above relationship, the optical lens 100 can maintain a smooth movement of the image plane during the switch from the far focus to the near focus, reduce aberration fluctuations, and at the same time take into account the compactness of the mechanical structure, ultimately achieving high-resolution imaging across the entire focal length.

[0072] In some embodiments, the materials of the first lens L1, the second lens L2, the optical element PR, the third lens L3, the fourth lens L4, and the fifth lens L5 can all be glass, so that while the optical lens 100 has good optical effects, it can also reduce the influence of temperature on the above lenses. In some embodiments, among the first lens L1, the second lens L2, the optical element PR, the third lens L3, the fourth lens L4, and the fifth lens L5, a part can be made of glass material and the other part can be made of plastic material, so as to ensure reducing the influence of temperature on the lens to achieve better imaging effects, while also being able to reduce the processing cost of the lens and the weight of the lens, thereby reducing the processing cost of the optical lens 100 and reducing the overall weight of the optical lens 100. In some embodiments, the materials of the first lens L1, the second lens L2, the optical element PR, the third lens L3, the fourth lens L4, and the fifth lens L5 can all be plastic to reduce the weight of the optical lens 100 and lower the cost.

[0073] In some embodiments, the optical element PR can be a common prism or a right-angle prism. PR has an incident surface PR1, a reflection surface PR2, and an exit surface PR3.

[0074] In some embodiments, to increase the freedom of surface design, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 can all be aspherical, thus ensuring image quality. It is understood that in other embodiments, the surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 in the optical lens 100 can also be spherical.

[0075] In some embodiments, the optical lens 100 further includes an aperture stop STO, which may be an aperture stop and / or a field stop. For example, the aperture stop STO may be an aperture stop, or it may be a field stop, or it may be both an aperture stop and a field stop. In this embodiment, the aperture stop STO is disposed on the object side S1 of the first lens L1. It is understood that in other embodiments, the aperture stop STO may also be disposed between other lenses, and the setting may be adjusted according to the actual situation. This embodiment does not specifically limit this.

[0076] In some embodiments, the optical lens 100 further includes a filter IR, which is disposed between the fifth lens L5 and the imaging surface IMG of the optical lens 100. In this embodiment, the filter IR may be an infrared cutoff filter, which can filter out light of other wavelengths such as infrared light, while allowing only visible light to pass through, making the image more consistent with the visual experience of the human eye.

[0077] Of course, an infrared bandpass filter can also be used for the IR filter, which can filter out light of other wavelengths such as visible light and only allow infrared light to pass through. By filtering out light of other wavelengths such as visible light, the image quality is improved.

[0078] It is understood that the IR filter can be made of glass, optical glass with a coating, or other materials. The choice can be made according to actual needs, and no specific limitation is made in this embodiment.

[0079] The distance from the object side surface S1 to the object end of the first lens L1 is defined as the object distance of the optical lens 100. By adjusting the object distance of the optical lens 100, the optical lens 100 can capture different shooting ranges. The state where the object distance of the optical lens 100 is infinitely large is defined as the telephoto state of the optical lens 100, and the state where the object distance of the optical lens 100 is small (e.g., the object distance is less than or equal to 200mm) is defined as the near-focus state of the optical lens 100.

[0080] First Embodiment

[0081] Please see Figure 2 and Figure 4In this embodiment, the optical lens 100 sequentially comprises a first lens L1, a second lens L2, an optical element PR, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter IR along the optical axis from the object side to the image side. The first lens L1 and the second lens L2 constitute a first lens group G1, and the third lens L3, the fourth lens L4, and the fifth lens L5 constitute a second lens group G2. The first lens group G1 and the optical element PR are fixed relative to the imaging surface IMG of the optical lens 100, and the second lens group G2 moves along the optical axis between the optical element PR and the imaging surface IMG of the optical lens 100.

[0082] The first lens L1 has positive refractive power, with its object-side surface S1 being convex near the optical axis and its image-side surface S2 being concave near the optical axis. The second lens L2 has negative refractive power, with its object-side surface S3 being convex near the optical axis and its image-side surface S4 being concave near the optical axis. The third lens L3 has negative refractive power, with its object-side surface S5 being concave near the optical axis and its image-side surface S6 being convex near the optical axis. The fourth lens L4 has positive refractive power, with its object-side surface S7 being concave near the optical axis and its image-side surface S8 being convex near the optical axis. The fifth lens L5 has negative refractive power, with its object-side surface S9 being concave near the optical axis and its image-side surface S10 being convex near the optical axis. In this embodiment, the optical element PR is a prism.

[0083] Specifically, the parameters of the optical lens 100 are given in Table 1a. The elements along the optical axis of the optical lens 100, from the object side to the image side, are arranged sequentially from top to bottom according to Table 1a. In the same lens, the surface with the smaller surface number is the object-side surface of the lens, and the surface with the larger surface number is the image-side surface of the lens. For example, surface numbers 1 and 2 correspond to the object-side surface S1 and image-side surface S2 of the first lens L1, respectively. The Y-radius in Table 1a is the radius of curvature of the corresponding object-side or image-side surface at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens along the optical axis, and the second value is the distance from the image-side surface of the lens to the next surface along the optical axis. The value of the stop STO in the "Thickness" parameter column represents the distance on the optical axis from the stop STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis). By default, the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When this value is negative, it indicates that the stop STO is set on the image side of the next surface vertex. If the stop STO thickness is positive, the stop STO is on the object side of the next surface vertex. It is understood that the units for the Y-radius, thickness, and focal length in Table 1a are all mm. Furthermore, the refractive index, Abbe number, and focal length in Table 1a are all obtained at a reference wavelength of 555 nm. Considering that the optical lens 100 of this invention can achieve internal focusing, it has a telephoto state and a near-focus state. Therefore, it has different object distances A in the telephoto state and the near-focus state. At the same time, in the telephoto state and the near-focus state, the air gap in the optical axis direction between the exit surface PR3 of the optical element PR and the object side surface S5 of the third lens L3 (i.e., B in Table 1a) is different, and the air gap in the optical axis direction between the image side surface S8 of the fourth lens L4 and the object side surface of the filter IR (i.e., C in Table 1a) is also different.

[0084] In Table 1a, the thickness corresponding to surface number 5 refers to the distance on the optical axis from the incident surface PR1 of optical element PR to the reflecting surface PR2. The thickness corresponding to surface number 6 refers to the distance on the optical axis from the reflecting surface PR2 of optical element PR to the exit surface PR3.

[0085] Based on this, Table 1b was compiled, which gives the values ​​of A, B, C, FNO, TTL, FOV, ImgH, and f in both telephoto and near-photo modes. In Table 1b, the unit of FOV is deg, FNO has no unit, and the units of other parameters are mm.

[0086] Furthermore, in Tables 1a and 1c, surface numbers 1 and 2 correspond to the object-side surface S1 and image-side surface S2 of the first lens L1, respectively; surface numbers 3 and 4 correspond to the object-side surface S3 and image-side surface S4 of the second lens L2, respectively; surface numbers 5, 6, and 7 correspond to the incident surface PR1, reflecting surface PR2, and exit surface PR3 of the optical element PR, respectively; surface numbers 8 and 9 correspond to the object-side surface S8 and image-side surface S9 of the third lens L3, respectively; surface numbers 10 and 11 correspond to the object-side surface S7 and image-side surface S8 of the fourth lens L4, respectively; and surface numbers 12 and 13 correspond to the object-side surface S9 and image-side surface S10 of the fifth lens L5, respectively.

[0087] In the first embodiment, the object-side surface and image-side surface of any one of the second lens L2 to the fifth lens L5 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0088]

[0089] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. Table 1c gives the higher-order coefficients K, A4, A6, A8, A10, A12, A14, and A16 of the aspherical mirrors S3, S4, S8, S9, S10, S11, S12, and S13 that can be used in the first embodiment.

[0090] Table 1a

[0091]

[0092] Table 1b

[0093] parameter A(mm) B(mm) C(mm) FNO TTL(mm) FOV (°) ImgH(mm) f(mm) Telephoto mode (Z1) unlimited 0.856 4.814 3.000 17.100 22.200 3.277 16.600 Close-focus mode (Z2) 200.000 2.946 2.714 3.080 17.100 20.700 3.277 15.300

[0094] Table 1c

[0095]

[0096]

[0097] Please see Figure 3 , Figure 5 (A) in the middle Figure 3 , Figure 5Figure (A) shows the longitudinal spherical aberration diagrams of the optical lens 100 in the first embodiment at wavelengths of 650.0000 nm, 610.0000 nm, 555.0000 nm, 510.0000 nm, and 470.0000 nm, respectively, in both telephoto and near-focus states. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 3 , Figure 5 As can be seen from (A) in the figure, in the telephoto state (such as...) Figure 3 ) and close-focus states (such as Figure 5 Under the condition that the spherical aberration value of the optical lens 100 in the first embodiment is better, it indicates that the imaging quality of the optical lens 100 in this embodiment is better.

[0098] Please see Figure 3 , Figure 5 (B) in the middle Figure 3 , Figure 5 Figure (B) shows the astigmatism diagrams of the optical lens 100 in the first embodiment at wavelengths of 650.0000 nm, 610.0000 nm, 555.0000 nm, 510.0000 nm, and 470.0000 nm, respectively, in both telephoto and near-focus states. The horizontal axis along the X-axis represents the focus shift, and the vertical axis along the Y-axis represents the image height, in mm. In the astigmatism diagram, T represents the curvature of the imaging plane IMG in the meridional direction, and S represents the curvature of the imaging plane IMG in the sagittal direction. Figure 3 , Figure 5 As can be seen from (B) in the figure, at this wavelength, the telephoto state (such as...) Figure 3 ) and close-focus states (such as Figure 5 The astigmatism of the optical lens 100 was well compensated.

[0099] Please see Figure 3 and Figure 5 (C) in the middle, Figure 3 , Figure 5 Figure (C) shows the distortion curves of the optical lens 100 in the first embodiment at wavelengths of 650.0000 nm, 610.0000 nm, 555.0000 nm, 510.0000 nm, and 470.0000 nm, respectively, in both telephoto and near-focus states. The horizontal axis along the X-axis represents distortion, and the vertical axis along the Y-axis represents image height, in mm. Figure 3 and Figure 5 As can be seen from (C) in the figure, at this wavelength, the telephoto state (such as...) Figure 3 ) and close-focus states (such as Figure 5 The distortion of the optical lens 100 was well corrected.

[0100] Second Embodiment

[0101] Please see Figure 6 The difference between the structure of the second embodiment and the first embodiment is that the third lens L3 has positive refractive force; the other aspects can be referred to in the same way.

[0102] Table 2a shows the parameters of the optical lens 10 in this embodiment. The focal length, material refractive index and Abbe number are obtained using visible light with a reference wavelength of 555nm. The units for Y radius, thickness, focal length and effective half aperture are millimeters (mm). The meanings of the other parameters are the same as those in the first embodiment.

[0103] Table 2a

[0104]

[0105]

[0106] Table 2b is a supplementary parameter to Table 2a, specifically the values ​​corresponding to the parameter changes of optical lens 100 in telephoto (Z1) and near-focus (Z2) states.

[0107] Table 2b

[0108] parameter A(mm) B(mm) C(mm) FNO TTL(mm) FOV (°) ImgH(mm) f(mm) Telephoto mode (Z1) unlimited 0.917 6.500 3.100 18.400 21.000 3.277 17.500 Close-focus mode (Z2) 200.000 3.227 4.190 3.250 18.400 19.300 3.277 16.600

[0109] Table 2c gives the higher-order coefficients that can be used for each aspherical mirror in the second embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0110] Table 2c

[0111]

[0112] Please see Figure 7 ,Depend on Figure 7 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the telephoto state, the astigmatism and distortion of the optical lens 100 are well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 7 The wavelengths corresponding to curves (A), (B), and (C) in the figure can be referred to in the first embodiment regarding the wavelengths. Figure 3 and Figure 5 The contents described in (A) and (B) are not repeated here.

[0113] Third Embodiment

[0114] Please see Figure 8The difference between the structure of the third embodiment and the first embodiment is that the third lens L3 has positive refractive power and the fourth lens L4 has negative refractive power; the other aspects can be referred to in the same way.

[0115] Table 3a shows the parameters of the optical lens 10 in this embodiment. The focal length, material refractive index and Abbe number are obtained using visible light with a reference wavelength of 555nm. The units for Y radius, thickness, focal length and effective half aperture are millimeters (mm). The meanings of the other parameters are the same as those in the first embodiment.

[0116] Table 3a

[0117]

[0118] Table 3b is a supplementary parameter to Table 3a, specifically the values ​​corresponding to the parameter changes of optical lens 100 in telephoto (Z1) and near-focus (Z2) states.

[0119] Table 3b

[0120] parameter A(mm) B(mm) C(mm) FNO TTL(mm) FOV (°) ImgH(mm) f(mm) Telephoto mode (Z1) unlimited 0.865 4.883 2.800 16.840 23.000 3.277 16.100 Close-focus mode (Z2) 200.000 3.005 2.743 2.950 16.840 20.900 3.277 15.100

[0121] Table 3c gives the higher-order coefficients that can be used for each aspherical mirror in the third embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0122] Table 3c

[0123]

[0124]

[0125] Please see Figure 9 ,Depend on Figure 9 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the telephoto state, the astigmatism and distortion of the optical lens 100 are well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 9 The wavelengths corresponding to curves (A), (B), and (C) in the figure can be referred to in the first embodiment regarding the wavelengths. Figure 3 and Figure 5 The contents described in (A), (B), and (C) will not be repeated here.

[0126] Fourth embodiment

[0127] Please see Figure 10 The difference between the structure of the fourth embodiment and the first embodiment is that the third lens L3 has positive refractive power and the fourth lens L4 has negative refractive power; the rest can be referred to in the same way.

[0128] Table 4a shows the parameters of the optical lens 10 in this embodiment. The focal length, material refractive index and Abbe number are obtained using visible light with a reference wavelength of 555nm. The units for Y radius, thickness, focal length and effective half aperture are millimeters (mm). The meanings of the other parameters are the same as those in the first embodiment.

[0129] Table 4a

[0130]

[0131] Table 4b is a supplementary parameter to Table 4a, specifically the values ​​corresponding to the parameter changes of optical lens 100 in telephoto (Z1) and near-focus (Z2) states.

[0132] Table 4b

[0133] parameter A(mm) B(mm) C(mm) FNO TTL(mm) FOV (°) ImgH(mm) f(mm) Telephoto mode (Z1) unlimited 0.867 4.048 2.700 16.100 24.100 3.277 15.200 Close-focus mode (Z2) 200.000 2.947 1.968 2.850 16.100 21.800 3.277 14.300

[0134] Table 4c gives the higher-order coefficients that can be used for each aspherical mirror in the fourth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0135] Table 4c

[0136]

[0137]

[0138] Please see Figure 11 ,Depend on Figure 11 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the telephoto state, the astigmatism and distortion of the optical lens 100 are well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 11 The wavelengths corresponding to curves (A), (B), and (C) in the figure can be referred to in the first embodiment regarding the wavelengths. Figure 3 and Figure 5 The contents described in (A), (B), and (C) will not be repeated here.

[0139] Fifth Embodiment

[0140] Please see Figure 12 The difference between the structure of the fifth embodiment and the first embodiment is that the third lens L3 has positive refractive power and the fourth lens L4 has negative refractive power; the others can be referred to in the same way.

[0141] Table 5a shows the parameters of the optical lens 10 in this embodiment. The focal length, material refractive index and Abbe number are obtained using visible light with a reference wavelength of 555nm. The units for Y radius, thickness, focal length and effective half aperture are millimeters (mm). The meanings of the other parameters are the same as those in the first embodiment.

[0142] Table 5a

[0143]

[0144]

[0145] Table 5b is a supplementary parameter to Table 5a, specifically the values ​​corresponding to the parameter changes of optical lens 100 in telephoto (Z1) and near-focus (Z2) states.

[0146] Table 5b

[0147] parameter A(mm) B(mm) C(mm) FNO TTL(mm) FOV (°) ImgH(mm) f(mm) Telephoto mode (Z1) unlimited 0.895 7.067 3.2 18.9 20.3 3.277 18.2 Close-focus mode (Z2) 200.000 3.985 3.977 3.36 18.9 18.3 3.277 16.3

[0148] Table 5c gives the higher-order coefficients that can be used for each aspherical mirror in the fifth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0149] Table 5c

[0150]

[0151] Please see Figure 13 ,Depend on Figure 13 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the telephoto state, the astigmatism and distortion of the optical lens 100 are well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 13 The wavelengths corresponding to curves (A), (B), and (C) in the figure can be referred to in the first embodiment regarding the wavelengths. Figure 3 and Figure 5 The contents described in (A), (B), and (C) will not be repeated here.

[0152] Please refer to Table 6, which summarizes the ratios of the relationships in the first to fifth embodiments of this application.

[0153] Table 6

[0154]

[0155]

[0156] Please see Figure 14This application also provides a camera module 200. The camera module 200 includes an optical lens 100 and an image sensor 201 as described in any of the above embodiments. The image sensor 201 is disposed on the image side of the optical lens 100. The image sensor 201 may be a complementary metal-oxide-semiconductor (CMOS) image sensor or a charge-coupled device (CCD).

[0157] Please see Figure 15 This invention also provides an electronic device 300. The electronic device 300 includes a housing 301 and a camera module 200, the camera module 200 being mounted on the housing 301. The electronic device 300 in this application includes, but is not limited to, imaging-enabled electronic devices such as dashcams, smartphones, tablets, laptops, e-book readers, portable multimedia players (PMPs), portable telephones, video phones, mobile medical devices, and wearable devices.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. An optical lens, characterized in that, There are a total of five lenses with refractive power, which sequentially include a first lens, a second lens, an optical element, a third lens, a fourth lens, and a fifth lens along the optical axis from the object side to the image side; The first lens and the second lens form a first lens group, the third lens, the fourth lens, and the fifth lens form a second lens group, the first lens group and the optical element are fixed relative to the imaging surface of the optical lens, and the second lens group moves along the optical axis direction between the optical element and the imaging surface of the optical lens; The first lens has positive refractive power, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis; The second lens has negative refractive power, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis; The third lens has refractive power, its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis; The fourth lens has refractive power, its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis; The fifth lens has negative refractive power, its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis; The optical lens satisfies the following relationship: 2.7 ≤ FNO < 3.4; 18° < FOV < 25°; Where, FNO is the f-number of the optical lens, and FOV is the maximum field angle of the optical lens.

2. The optical lens as described in claim 1, characterized in that, The optical lens satisfies the following relationship: 4.8 < TTL / ImgH < 5.9, and / or, 1.03 ≤ TTL / fz1 < 1.06, and / or, 3.6 < TTL / P1 < 4.3, and / or, 2.8 < TTL / fz1*FNOz1 < 3.4; Where, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical lens, ImgH is half of the image height corresponding to the maximum field angle of the optical lens, fz1 is the effective focal length of the optical lens in the telephoto state, P1 is the distance on the optical axis from the incident surface of the optical element to the exit surface of the optical element in the telephoto state, and FNOz1 is the f-number of the optical lens in the telephoto state.

3. The optical lens as described in claim 1, characterized in that, The optical lens satisfies the following relationship: 3.4 < fz1 / R11 < 4, and / or, 1 < R12 / fz1 < 1.8, and / or, 3.7 < fz1 / R21 < 5.4, and / or, 5.4 < fz1 / R22 < 6.7, and / or, 5.7 < fz1 / R31 < 7.1, and / or, 4.4 < fz1 / R32 < 7.8, and / or, 0.5 < fz1 / R41 < 4.4, and / or, 1.6 < fz1 / R42 < 4, and / or, 1 < fz1 / R51 < 2.4, and / or, 0.6 < R52 / fz1 < 2.4, and / or, 4.1 < R12 / R11 < 6.4, and / or, 1.2 < R21 / R22 < 1.5, and / or, 0.9 < R32 / R31 < 1.5, and / or, 0.6 < R41 / R42 < 5, and / or, 1.5 < R52 / R51 < 3.8; Where, fz1 is the effective focal length of the optical lens in the telephoto state, R11 is the curvature radius of the object side surface of the first lens on the optical axis, R12 is the curvature radius of the image side surface of the first lens on the optical axis, R21 is the curvature radius of the object side surface of the second lens on the optical axis, R22 is the curvature radius of the image side surface of the second lens on the optical axis, R31 is the curvature radius of the object side surface of the third lens on the optical axis, R32 is the curvature radius of the image side surface of the third lens on the optical axis, R41 is the curvature radius of the object side surface of the fourth lens on the optical axis, R42 is the curvature radius of the image side surface of the fourth lens on the optical axis, R51 is the curvature radius of the object side surface of the fifth lens on the optical axis, and R52 is the curvature radius of the image side surface of the fifth lens on the optical axis.

4. The optical lens as described in claim 1, characterized in that, The optical lens satisfies the following relational expressions: 1.7 < fz1 / f1 < 2.8, and / or, 0.6 < fz1 / |f2| < 4.5, and / or, 0.8 < |f3| / fz1 < 4.7, and / or, 0.6 < |f4| / fz1 < 6.4, and / or, 1.2 < |f5| / fz1 < 2.7, and / or, 13 < f12 / PrL < 16.4; Where, fz1 is the effective focal length of the optical lens in the telephoto state, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f12 is the combined effective focal length of the first lens and the second lens, and PrL is the distance from the exit surface of the optical element in the telephoto state to the object side surface of the third lens on the optical axis.

5. The optical lens as described in claim 1, characterized in that, The optical lens satisfies the following relational expressions: 1.3 < ImgH / SD52 < 1.9, and / or, 1.1 < SD11 / SD52 < 1.7, and / or, 1.57 < SDmax / SDmin < 2.2, and / or, 1.1 < ImgH / SDmax < 1.18; Where, ImgH is half of the image height corresponding to the maximum field angle of the optical lens, SD52 is half of the maximum effective aperture of the image side surface of the fifth lens, SD11 is half of the maximum effective aperture of the object side surface of the first lens, SDmax is the maximum effective semi-aperture of the optical lens, and SDmin is the minimum effective semi-aperture of the optical lens.

6. The optical lens as described in claim 1, characterized in that, The optical lens satisfies the following relational expressions: 1.2 < TDz1 / BLz1 < 2.1, and / or, 1.1 < TDz2 / TDz1 < 1.2, and / or, 3.2 < TDz1 / ImgH < 3.4, and / or, 0.92 < GL2 / GL1 < 1.2; Where, TDz1 is the distance from the object side of the first lens to the image side of the fifth lens on the optical axis in the telephoto state, BLz1 is the distance from the image side of the fifth lens to the imaging surface of the optical lens on the optical axis in the telephoto state, TDz2 is the distance from the object side of the first lens to the image side of the fifth lens on the optical axis in the close-focus state, ImgH is half of the image height corresponding to the maximum field angle of the optical lens, GL2 is the distance from the object side of the third lens to the image side of the fifth lens on the optical axis, and GL1 is the distance from the object side of the first lens to the image side of the second lens on the optical axis.

7. The optical lens as described in claim 1, characterized in that, The optical lens satisfies the following conditional expressions: 3.5 < CT1 / CT2 < 4.5, and / or, 0.5 < CT4 / CT3 < 1.7, and / or, 0.7 < CT4 / CT5 < 2.1, and / or, 1 < (CT1 + CT2) / (CT3 + CT4 + CT5) < 1.2, and / or, 3.8 < (CT3 + CT4 + CT5) / (AT34 + AT45) < 10.1; Where, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, AT34 is the distance on the optical axis between the image side of the third lens and the object side of the fourth lens, and AT45 is the distance on the optical axis between the image side of the fourth lens and the object side of the fifth lens.

8. The optical lens as described in claim 1, characterized in that, The optical lens satisfies the following conditional expressions: 1.07 < FOVz1 / FOVz2 < 1.2, and / or, 1.02 < FNOz2 / FNOz1 < 1.06, and / or, 1.5 < R52 / BLz1 < 6.3, and / or, 7 < |f345| / BLz1| < 27, and / or, 1.2 < BLz2 / BLz1 < 1.4; Where, FOVz1 is the maximum field angle of the optical lens in the telephoto state, FOVz2 is the maximum field angle of the optical lens in the close-focus state, FNOz2 is the aperture number of the optical lens in the close-focus state, FNOz1 is the aperture number of the optical lens in the telephoto state, R52 is the curvature radius of the image side of the fifth lens at the optical axis, BLz1 is the distance from the image side of the fifth lens to the imaging surface of the optical lens on the optical axis in the telephoto state, f345 is the combined effective focal length of the third lens, the fourth lens and the fifth lens, and BLz2 is the distance from the image side of the fifth lens to the imaging surface of the optical lens on the optical axis in the close-focus state.

9. A camera module, characterized in that, Comprising: The optical lens according to any one of claims 1 to 8; And An image sensor disposed on the image side of the optical lens.

10. An electronic device, characterized in that, Comprising: A housing; And The imaging module according to claim 9, and the imaging module is mounted on the housing.

Images