Optical lenses, camera modules and terminal equipment

Abstract

This application discloses an optical lens, a camera module, and a terminal device. The optical lens comprises six lenses with refractive power, arranged sequentially along the optical axis from the object side to the image side as a first lens, a second lens, a third lens, a prism, a fourth lens, a fifth lens, and a sixth lens. The prism is used to redirect light rays. The first, second, and third lenses form a fixed lens group, while the fourth, fifth, and sixth lenses form a movable lens group. The movable lens group is movable relative to the imaging plane of the optical lens along the optical axis. The optical lens satisfies the following relationships: 19° < FOV < 25° and 2.7 < FNO < 3.3. Here, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens. This optical lens features miniaturization, high resolution, and fast zoom, enabling high-quality short-focus and long-focus shooting.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and in particular to an optical lens, camera module and terminal device. Background Technology

[0002] To achieve the trend of thinner and lighter personal electronic products, the internal components of these products need to be smaller. With the development of technology, especially the rapid development of optical imaging devices, periscope lenses, in order to achieve a smaller size, often become too long as the chip or focal length increases, leading to interference problems with other mobile phone components.

[0003] Currently, to achieve closer image capture, imaging devices in mobile phones and other electronic devices generally move the entire lens group or chip. However, in addition to poor image quality with a large field of view, this focusing method also has a large focusing distance. Moreover, whether moving the lens or the chip, the focusing distance will affect the overall optical height.

[0004] Therefore, there is a need in this field for an optical lens that features miniaturization, high resolution, and fast zoom. Summary of the Invention

[0005] This application discloses an optical lens, a camera module, and a terminal device. The optical lens features miniaturization, high resolution, and fast zoom, enabling it to meet the requirements of high-quality short-focus and long-focus shooting.

[0006] To achieve the above objectives, in a first aspect, this application discloses an optical lens comprising six lenses with refractive power, wherein the optical lens, from the object side to the image side, comprises:

[0007] The first lens has positive refractive power. The object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis.

[0008] The second lens has negative refractive power. The object side of the second lens is convex near the optical axis, and the image side of the second lens is concave near the optical axis.

[0009] The third lens has positive refractive power, and both the object-side and image-side surfaces of the third lens are convex near the optical axis.

[0010] A prism is used to redirect light rays;

[0011] The fourth lens has negative refractive power, and both the object-side and image-side surfaces of the fourth lens are concave near the optical axis.

[0012] The fifth lens has positive refractive power. The object-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the fifth lens is convex near the optical axis.

[0013] The sixth lens has positive refractive power, and both the object-side and image-side surfaces of the sixth lens are convex near the optical axis.

[0014] Wherein, the first lens to the third lens are a fixed lens group, the fourth lens to the sixth lens are a movable lens group, the fixed lens group is fixed relative to the imaging surface of the optical lens, and the movable lens group is movable along the optical axis between the prism and the imaging surface;

[0015] The optical lens satisfies the following relationship:

[0016] 19° < FOV < 25° and 2.7 < FNO < 3.3;

[0017] Wherein, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

[0018] The optical lens provided in this application comprises, from the object side to the image side, a first lens, a second lens, a third lens, a prism, a fourth lens, a fifth lens, and a sixth lens. The first, second, and third lenses constitute a fixed lens group, while the fourth, fifth, and sixth lenses constitute a movable lens group. By placing the prism between the fixed and movable lens groups, the optical axis is folded, thereby reducing the length and height of the optical lens. The first lens has positive refractive power, and its object-side surface is convex while its image-side surface is concave; that is, the first lens is a meniscus shape with its convex surface facing the object side. This effectively collects incident light rays with a large field of view, increasing the field of view of the fixed lens group, which is beneficial for converging incident light rays and improving the imaging performance of the optical lens. The second lens has negative refractive power, and its object-side surface is convex while its image-side surface is concave. This can initially correct the astigmatism of the optical lens and effectively control the light path, achieving a larger aperture. The third lens has positive optical power, and both its object-side and image-side surfaces are convex. This helps to lower the incident angle of light after passing through the second lens, allowing more light to enter the image-side optical lens and improving its illumination. The fourth lens has negative refractive power, and both its object-side and image-side surfaces are concave near the optical axis. This helps to eliminate chromatic aberration, correct astigmatism, improve resolution, and reduce the light deflection angle, thus lowering the sensitivity of the optical lens. The fifth lens's object-side and image-side surfaces are concave and convex near the optical axis, respectively, allowing light from the fifth lens to be further coupled into the optical lens. The sixth lens has positive optical power, and both its object-side and image-side surfaces are convex near the optical axis. This enables light convergence, reduces the overall optical length, and further facilitates the miniaturization of the optical lens. In this application, since the optical lens focuses only through the movement of the movable lens group, it not only improves the shooting quality of wide-field images but also effectively reduces the excessively long focusing distance, achieving rapid zoom.

[0019] The optical lens satisfies the relationship 19° < FOV < 25°. Within this range, the optical lens can have telephoto characteristics and provide an appropriate field of view to meet the needs of long-distance shooting and the characteristics of high pixel and high definition.

[0020] The optical lens satisfies the relationship 2.7 < FNO < 3.3. By constraining the aperture number of the optical lens, the light transmission capability of the optical lens can be improved, resulting in higher relative illumination and good image quality even in darker environments, thus meeting the requirements of large aperture and high resolution.

[0021] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0022] 1.5 < fi / f1 < 1.7, and / or, -1.3 < fi / f2 < -1.1, and / or, 1.3 < fi / f3 < 1.4, and / or, -2.2 < fi / f4 < -1.7, and / or, fi / f5 > 7, and / or, 1.73 < f6 / fi < 1.95;

[0023] Wherein, fi is the focal length of the optical lens in telephoto mode, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, and f6 is the focal length of the sixth lens.

[0024] When an optical lens satisfies the above relationship, it can reasonably control the ratio of the effective focal length of each lens to the effective focal length of the optical lens, so that the refractive power distribution of each lens in the optical lens is appropriate. This is beneficial for correcting advanced spherical aberrations and avoids excessive changes in the refractive power of a certain lens, which could cause image correction problems in the optical lens, thereby improving the imaging quality of the optical lens.

[0025] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0026] 2.9 < fi / R1 < 3.3, and / or, 1.1 < fi / R2 < 1.5, and / or, R3 / fi > 5, and / or, 1.9 < fi / R4 < 2.1, and / or, 0.2 < fi / |R5| < 2.2, and / or, -4.3 < R6 / fi < -1.3, and / or, 0.9 < fi / R7 < 1.3, and / or, -2.8 < fi / R8 < -2.2, and / or, 1.1 < R9 / fi < 2, and / or, 1.1 < R10 / fi < 1.5, and / or, -1.7 < R11 / fi < -1.4, and / or, 2.7 < R12 / fi < 3.3;

[0027] Wherein, fi is the focal length of the optical lens in telephoto mode, R1 is the radius of curvature of the object side of the first lens at the optical axis, R2 is the radius of curvature of the image side of the first lens at the optical axis, R3 is the radius of curvature of the object side of the second lens at the optical axis, R4 is the radius of curvature of the image side of the second lens at the optical axis, R5 is the radius of curvature of the object side of the third lens at the optical axis, R6 is the radius of curvature of the image side of the third lens at the optical axis, R7 is the radius of curvature of the object side of the fourth lens at the optical axis, R8 is the radius of curvature of the image side of the fourth lens at the optical axis, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, R10 is the radius of curvature of the image side of the fifth lens at the optical axis, R11 is the radius of curvature of the object side of the sixth lens at the optical axis, and R12 is the radius of curvature of the image side of the sixth lens at the optical axis.

[0028] When an optical lens satisfies the above relationship, it can reasonably match the ratio between the radius of curvature of the object side and image side of each lens at the optical axis and the focal length of the optical lens. This makes the surface shape difference of each lens set reasonably, which is conducive to controlling the shape of each lens, correcting the aberrations it produces, balancing astigmatism, and improving the image quality.

[0029] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0030] -1.6 < f456 / f123 < -1.3, and / or, 1.05 < fi / fm < 1.15;

[0031] Wherein, f123 is the focal length of the fixed lens group, f456 is the focal length of the movable lens group, fi is the focal length of the optical lens in the telephoto state, and fm is the focal length of the optical lens in the short focal state.

[0032] The optical lens satisfies the relationship -1.6 < f456 / f123 < -1.3. The focal lengths of the movable and fixed lens groups of the optical lens can be reasonably allocated, so that the telephoto lens can balance the image quality differences between long-distance shooting and macro shooting with a small assembly sensitivity, thus enabling the optical lens to have good imaging effect.

[0033] The optical lens satisfies the relationship 1.05 < fi / fm < 1.15. By reasonably controlling the ratio range of the focal length of the optical lens in the telephoto and short focal length states, the focal length difference between the telephoto and short focal length states can be appropriately reduced, the movement stroke of the movable lens group can be reduced, and thus the response time of the movable lens group when focusing can be shortened.

[0034] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship:

[0035] 5 < TTL / ImgH < 5.6, and / or, 1.05 < ImgH / SD1 < 1.2, and / or, 1.3 < ImgH / SD6 < 1.5;

[0036] Wherein, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, Imgh is half the image height corresponding to the maximum field of view of the optical lens, SD1 is the maximum effective half-aperture of the object side of the first lens, and SD6 is the maximum effective half-aperture of the image side of the third lens.

[0037] The optical lens satisfies the relationship 5 < TTL / ImgH < 5.6. By reasonably limiting the range of the ratio of the total optical length to the image height of the optical lens, the optical lens can have ultra-thin characteristics, which is more advantageous for shooting objects at medium focal distance and miniaturizing the camera device.

[0038] The optical lens satisfies the relationship 1.05 < ImgH / SD1 < 1.2, ensuring that the ratio of the effective half-aperture of the object side of the first lens to the image height corresponding to the maximum field of view is within a certain range. This can effectively reduce the sensitivity of the zoom system and ensure the imaging quality of the system.

[0039] The optical lens satisfies the relationship 1.3 < ImgH / SD6 < 1.5, ensuring that the ratio of the effective half-aperture of the image side of the third lens to the image height corresponding to the maximum field of view is within a certain range. This can effectively reduce the sensitivity of the zoom system and ensure the imaging quality of the system.

[0040] As an optional implementation, the optical lens satisfies the following relationship:

[0041] 1 < FOVi / FOVm < 1.1 and 1 < FNOi / FNOm < 1.05;

[0042] Wherein, FOVi is the maximum field of view of the optical lens in telephoto mode, FOVm is the maximum field of view of the optical lens in short focal length mode, FNOi is the aperture number of the optical lens in telephoto mode, and FNOm is the aperture number of the optical lens in short focal length mode.

[0043] An optical lens that satisfies the relationship 1 < FOVi / FOVm < 1.1 can possess telephoto characteristics while also meeting the requirements of high pixel count and high resolution.

[0044] The optical lens satisfies the relationship 1 < FNOi / FNOm < 1.05, which can also improve the light transmission capability of the optical lens, making the relative illumination of the optical lens higher, so that it has good image quality in darker environments, and meets the requirements of large aperture and high resolution.

[0045] As an optional implementation, the optical lens satisfies the following relationship:

[0046] 2.1 < CT1 / CT2 < 2.4, and / or, 0.7 < CT3 / CT4 < 1.3, and / or, 1.3 < CT5 / CT4 < 1.9, and / or, 0.8 < CT5 / CT6 < 1.1, and / or, 1.2 < CT3 / CT2 < 1.9, and / or, 1.1 < GL1 / GL2 < 1.3, and / or, 1.5 < AT12 / AT23 < 2.8;

[0047] Wherein, 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, CT6 is the thickness of the sixth lens on the optical axis, GL1 is the distance on the optical axis from the object side of the first lens to the image side of the third lens, GL2 is the distance on the optical axis from the object side of the fourth lens to the image side of the sixth lens, AT12 is the distance on the optical axis from the image side of the first lens to the object side of the second lens, and AT23 is the distance on the optical axis from the image side of the second lens to the object side of the third lens.

[0048] When an optical lens satisfies the above-mentioned relationships, it possesses better aberration correction capabilities, thus improving image quality. It also effectively optimizes the size and refractive power of each lens, preventing excessive spherical aberration and enhancing overall resolution while reducing the sensitivity of individual lenses. Furthermore, it allows for more rational changes in the relative positions of the fixed and movable lens groups when switching focal lengths, ensuring good image quality at both telephoto and focal lengths. In addition, this configuration helps optimize the lens's structural layout, making the entire lens more compact and stable.

[0049] As an optional implementation, the optical lens satisfies the following relationship:

[0050] 1.2 < SD1 / SD12 < 1.6, and / or, 1.4 < SD1 / SD10 < 1.8, and / or, 1.2 < SD12 / SD7 < 1.7, and / or, 1.1 < BLz1 / BLz2 < 1.2;

[0051] Wherein, SD1 is the maximum effective half-aperture of the object side of the first lens, SD7 is the maximum effective half-aperture of the object side of the fourth lens, SD10 is the maximum effective half-aperture of the image side of the fifth lens, SD12 is the maximum effective half-aperture of the image side of the sixth lens, BLz1 is the distance on the optical axis between the image side and the imaging plane of the sixth lens when the optical lens is in telephoto mode, and BLz2 is the distance on the optical axis between the image side and the imaging plane of the sixth lens when the optical lens is in short focal length mode.

[0052] Optical lenses satisfy the relationship 1.2 < SD1 / SD12 < 1.6, which can effectively reduce the deflection angle of light rays entering the imaging plane from the edge of the field of view, increase the matching degree between the optical lens and the imaging plane, improve off-axis field of view astigmatism, and enhance the overall imaging quality.

[0053] The optical lens satisfies the relationship 1.4 < SD1 / SD10 < 1.8, which can effectively reduce the deflection angle of edge field rays entering the sixth lens, increase the matching degree between the fixed lens group and the movable lens group, improve off-axis field astigmatism, and enhance the overall imaging quality.

[0054] The optical lens satisfies the relationship 1.2 < SD12 / SD7 < 1.7, which gives the movable lens group a small aperture characteristic, allowing for effective light convergence and enabling better light to enter the imaging plane of the optical lens.

[0055] The optical lens satisfies the relationship 1.1 < BLz1 / BLz2 < 1.2. By reasonably controlling the ratio of the distance between the image side surface and the imaging surface of the sixth lens on the optical axis in the telephoto and short focal length states, the focusing stroke of the movable lens group on the optical axis can be appropriately reduced, thereby reducing the focusing time of the optical lens.

[0056] Secondly, this application discloses a camera module, which includes an image sensor and the aforementioned optical lens, wherein the image sensor is disposed on the image side of the optical lens.

[0057] Thirdly, this application discloses a terminal device, including a housing and the aforementioned camera module, wherein the camera module is disposed in the housing.

[0058] Compared with the prior art, the beneficial effects of this application are as follows:

[0059] The optical lens provided in this application comprises, from the object side to the image side, a first lens, a second lens, a third lens, a right-angle prism, a fourth lens, a fifth lens, and a sixth lens. The first, second, and third lenses constitute a fixed lens group, while the fourth, fifth, and sixth lenses constitute a movable lens group. By placing the right-angle prism between the fixed and movable lens groups, the optical axis is folded, thereby reducing the length and height of the optical lens. The first lens has positive refractive power, and its object-side surface is convex while its image-side surface is concave; that is, the first lens is a meniscus shape with its convex surface facing the object side. This effectively collects incident light with a large field of view, increasing the field of view of the fixed-focus lens, which is beneficial for converging incident light and improving the imaging performance of the optical lens. The second lens has negative refractive power, and its object-side surface is convex while its image-side surface is concave. This can initially correct astigmatism in the optical lens and effectively control the direction of light, achieving a larger aperture. The third lens has positive optical power, and both its object-side and image-side surfaces are convex. This helps to lower the incident angle of light after passing through the second lens L2, allowing more light to enter the image-side optical lens and improving its illumination. The fourth lens has negative refractive power, and both its object-side and image-side surfaces are concave near the optical axis. This helps to eliminate chromatic aberration, correct astigmatism, improve resolution, and reduce the light deflection angle, thus lowering the sensitivity of the optical lens. The fifth lens's object-side and image-side surfaces are concave and convex near the optical axis, respectively, allowing light from the second lens to be further coupled into the optical lens. The sixth lens has positive optical power, and both its object-side and image-side surfaces are convex near the optical axis. This enables light convergence, reduces the overall optical length, and further facilitates the miniaturization of the optical lens. In this application, since the optical lens focuses only through the movement of the movable lens group, it not only improves the shooting quality of large-scale market images but also effectively reduces the excessively long focusing distance, achieving rapid zoom.

[0060] An optical lens that satisfies the relationship 19° < FOV < 25° can have telephoto characteristics and provide an appropriate field of view to meet the needs of long-distance shooting and the characteristics of high pixel and high definition.

[0061] The optical lens satisfies the relationship 2.7 < FNO < 3.3. By constraining the aperture number of the optical lens, the light transmission capability of the optical lens can be improved, resulting in higher relative illumination and good image quality even in darker environments, thus meeting the requirements of large aperture and high resolution. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 This is a schematic diagram of the optical lens in telephoto mode disclosed in Embodiment 1 of this application;

[0064] Figure 2 This is a schematic diagram of the optical lens disclosed in Embodiment 1 of this application in the short focal length state;

[0065] Figure 3 These are the field curvature and distortion diagrams of the optical lens in telephoto mode disclosed in Embodiment 1 of this application;

[0066] Figure 4 These are the field curvature and distortion diagrams of the optical lens in short focal length mode disclosed in Embodiment 1 of this application;

[0067] Figure 5 This is a schematic diagram of the optical lens in telephoto mode disclosed in Embodiment 2 of this application;

[0068] Figure 6 These are the field curvature and distortion diagrams of the optical lens in telephoto mode disclosed in Embodiment 2 of this application;

[0069] Figure 7 These are the field curvature and distortion diagrams of the optical lens in short focal length mode disclosed in Embodiment 2 of this application;

[0070] Figure 8 This is a schematic diagram of the optical lens in telephoto mode disclosed in Embodiment 3 of this application;

[0071] Figure 9 These are the field curvature and distortion diagrams of the optical lens in telephoto mode disclosed in Embodiment 3 of this application;

[0072] Figure 10 These are the field curvature and distortion diagrams of the optical lens in short focal length mode disclosed in Embodiment 3 of this application;

[0073] Figure 11 This is a schematic diagram of the optical lens in telephoto mode disclosed in Embodiment 4 of this application;

[0074] Figure 12 These are the field curvature and distortion diagrams of the optical lens in telephoto mode disclosed in Embodiment 4 of this application;

[0075] Figure 13These are the field curvature and distortion diagrams of the optical lens in short focal length mode disclosed in Embodiment 4 of this application;

[0076] Figure 14 This is a schematic diagram of the optical lens in telephoto mode disclosed in Embodiment 5 of this application;

[0077] Figure 15 These are the field curvature and distortion diagrams of the optical lens in telephoto mode disclosed in Embodiment 5 of this application;

[0078] Figure 16 These are the field curvature and distortion diagrams of the optical lens in short focal length mode disclosed in Embodiment 5 of this application;

[0079] Figure 17 This is a schematic diagram of the camera module disclosed in this application;

[0080] Figure 18 This is a structural diagram of the terminal device disclosed in this application when it is a smartphone. Detailed Implementation

[0081] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0082] In this application, the terms "upper," "front," "rear," "top," "inner," "outer," and "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0083] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0084] Furthermore, the term "setup" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection via an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0085] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0086] Periscope optical lenses fold the optical axis using light-folding elements such as prisms, which helps to achieve telephoto shooting in camera modules while avoiding increasing the thickness of electronic devices. Therefore, periscope optical lenses are widely used in electronic devices such as smartphones and tablets.

[0087] However, when periscope optical lenses employ a zoom design, interference may occur between the optical lens and other components within the electronic device. Furthermore, zooming of the camera module is typically achieved by moving the entire lens group or image sensor along the optical axis; however, this focusing method results in poor wide-field imaging and a large diagonal travel, leading to long focusing times and low response sensitivity.

[0088] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0089] Please see Figure 1 This application discloses an optical lens 100, which comprises six lenses with refractive power. The optical lens 100 is arranged along the optical axis from the object side to the image side as follows: a first lens L1, a second lens L2, a third lens L3, a prism P, a fourth lens L4, a fifth lens L5, and a sixth lens L6. 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 positive refractive power; both its object-side surface S5 and image-side surface S6 are convex near the optical axis. The prism P is used to deflect light rays. The fourth lens L4 has negative refractive power, and both its object-side surface S7 and image-side surface S8 are concave near the optical axis. The fifth lens L5 has positive refractive power, and both its object-side surface S9 and image-side surface S10 are convex near the optical axis. The sixth lens L6 has positive refractive power, and both its object-side surface S11 and image-side surface S12 are convex near the optical axis. During imaging, light rays sequentially enter the first lens L1, the second lens L2, the third lens L3, the prism P, the fourth lens L4, the fifth lens L5, and the sixth lens L6 from the object side of the first lens L1, and finally form an image on the imaging plane SI of the optical lens 100.

[0090] Optionally, the prism P can be a right-angle prism, a trapezoidal prism, or a freeform prism, etc. The following description uses a right-angle prism as an example, but it is not intended to imply that the following content applies only to this example.

[0091] The first lens L1 to the third lens L3 form a fixed lens group L123, and the fourth lens L4 to the sixth lens L6 form a movable lens group L456. The fixed lens group L123 is fixed relative to the imaging surface S1 of the optical lens 100, and the movable lens group L456 is movable along the optical axis between the right-angle prism P and the imaging surface S1. The incident surface P1 of the right-angle prism P is opposite to the image surface S6 of the third lens L3 along the optical axis. The reflecting surface P2 of the right-angle prism P is used to redirect the light rays entering the right-angle prism P from the incident surface P1 at a 90° angle and project them onto the exit surface P3 of the right-angle prism P. The exit surface P3 of the right-angle prism P is opposite to the object surface S7 of the fourth lens L4 along the optical axis. Understandably, since the right-angle prism P can fold the optical axis at a 90° angle, the optical axis of the optical lens 100 includes two mutually perpendicular segments; that is, the optical axis of the fixed lens group L123 is perpendicular to the optical axis of the movable lens group L456. Specifically, the image-side surface S6 of the third lens L3 is opposite to the incident surface P1 of the right-angle prism P in the direction of the optical axis of the fixed lens group L123, and the object-side surface S7 of the fourth lens L4 is opposite to the exit surface P3 of the right-angle prism P in the direction of the optical axis of the movable lens group L456.

[0092] Optionally, all lenses in the optical lens 100 may be made of glass, or all may be made of plastic, or some lenses may be made of glass and some of them may be made of plastic. Preferably, some lenses in the optical lens 100 are made of glass. Lenses made of glass can suppress the shift in the back focus of the optical lens 100 caused by temperature changes, thereby improving the stability of the optical lens 100. Some lenses are also made of plastic, which can reduce the weight of the optical lens 100. Furthermore, using plastic makes it easier to manufacture aspherical lenses, enabling the achievement of more ideal imaging performance with lower manufacturing difficulty.

[0093] Optionally, the first lens L1 can be a spherical lens, while the second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6 can be aspherical lenses. This can improve higher-order aberrations and thus enhance the imaging quality of the optical lens 100. By using specific surface shape combinations and reasonable power distribution, the imaging quality of the optical lens 100 can be improved, aberrations reduced, and the overall imaging quality enhanced.

[0094] In some embodiments, the optical lens 100 further includes an aperture stop 102, which may be an aperture stop and / or a field stop, and may be disposed on the object side of the first lens L1 of the optical lens 100. It is understood that in other embodiments, the aperture stop 102 may also be disposed between other lenses, and the setting may be adjusted according to the actual situation. This embodiment does not make specific limitations.

[0095] In some embodiments, the optical lens 100 further includes a filter 110, which can be disposed between the image-side surface S12 of the sixth lens L6 and the imaging surface S1 of the optical lens 100. The filter 110 is used to filter out stray light, enabling the optical lens 100 to form a clearer and more accurate image. Of course, in other embodiments, the filter 110 can also be disposed between other lenses, and the setting can be adjusted according to the actual situation. This embodiment does not make a specific limitation. Preferably, the filter 110 can be made of glass. Of course, in other embodiments, the filter 110 can also be made of optical glass with a coating, or a filter 110 of other materials. It can be selected according to actual needs, and this embodiment does not make a specific limitation.

[0096] In some embodiments, the optical lens 100 also includes a protective glass 120 disposed between the filter 110 and the imaging surface SI, so that it can be close to the imaging surface SI during subsequent assembly, thereby playing a protective role.

[0097] With the above configuration, the right-angle prism P is positioned between the fixed lens group L123 and the movable lens group L456, folding the optical axis so that the two lens groups are distributed in mutually perpendicular directions, thereby reducing the length and shoulder height of the optical lens 100. The first lens L1 has positive refractive power, and its object-side surface S1 is convex while its image-side surface S2 is concave. That is, the first lens L1 is a meniscus shape with the convex surface facing the object side, which can effectively collect incident light rays with a large field of view, increase the field of view of the fixed lens group L123, and facilitate the convergence of incident light rays, thereby improving the imaging performance of the optical lens 100. The second lens L2 has negative refractive power, its object-side surface S3 is convex while its image-side surface S4 is concave. It can initially correct the astigmatism of the optical lens 100, and at the same time effectively control the direction of light rays to achieve a larger aperture. The third lens L3 has positive optical power, and both its object-side surface S5 and image-side surface S6 are convex. This helps to lower the incident angle of light after passing through the second lens L2, allowing more light to enter the image-side optical lens 100 and improving the illumination of the optical lens 100. The fourth lens L4 has negative refractive power, and both its object-side surface S7 and image-side surface S8 are concave near the optical axis. This helps to eliminate chromatic aberration, correct astigmatism, improve resolution, and reduce the light deflection angle, thus lowering the sensitivity of the optical lens 100. The fifth lens L5 has an object-side surface S9 and an image-side surface S10 that are concave and convex near the optical axis, respectively, allowing the light from the fifth lens L5 to be further coupled into the optical lens 100. The sixth lens L6 has positive optical power, and both its object-side surface S11 and image-side surface S12 are convex near the optical axis. This enables light convergence, reduces the overall optical length, and further facilitates the miniaturization of the optical lens 100. In this application, since the optical lens 100 focuses only by moving the movable lens group L456, it can improve the shooting quality of wide field-of-view images and effectively reduce the excessively long focusing distance, thus achieving fast zoom.

[0098] In one embodiment, the optical lens 100 satisfies the relationship 19° < FOV < 25°, where FOV is the maximum field of view of the optical lens 100. Within this range, the optical lens 100 can have telephoto characteristics, providing an appropriate field of view to meet the long-distance shooting requirements and the characteristics of high pixel and high definition of the optical lens 100.

[0099] In one embodiment, the optical lens 100 satisfies the relationship 2.7 < FNO < 3.3, where FNO is the aperture number of the optical lens 100. By constraining the aperture number of the optical lens 100, the light transmission capability of the optical lens 100 can be improved, resulting in higher relative illumination of the optical lens 100. This enables it to have good imaging quality even in darker environments, meeting the requirements of large aperture and high resolution.

[0100] In one embodiment, the optical lens 100 also satisfies the relationship 1 < FOVi / FOVm < 1.1, where FOVi is the maximum field of view of the optical lens 100 in the telephoto state and FOVm is the maximum field of view of the optical lens 100 in the short focal state. Within this range, the optical lens 100 can have telephoto characteristics while also meeting the requirements of high pixel count and high resolution.

[0101] In one embodiment, the optical lens 100 also satisfies the relationship 1 < FNOi / FNOm < 1.05, where FNOi is the aperture number of the optical lens 100 in the telephoto state and FNOm is the aperture number of the optical lens 100 in the short focal state. In this way, the optical lens 100 can have telephoto characteristics while also meeting the requirements of high pixel count and high resolution.

[0102] In one embodiment, the optical lens 100 satisfies the relationship 1.5 < fi / f1 < 1.7, where fi is the focal length of the optical lens 100 in the telephoto state, and f1 is the focal length of the first lens L1.

[0103] In one embodiment, the optical lens 100 satisfies the relationship -1.3 < fi / f2 < -1.1, where f2 is the focal length of the second lens L2.

[0104] In one embodiment, the optical lens 100 satisfies the relationship 1.3 < fi / f3 < 1.4, where f3 is the focal length of the third lens L3.

[0105] In one embodiment, the optical lens 100 satisfies the relationship -2.2 < fi / f4 < -1.7, where f4 is the focal length of the fourth lens L4.

[0106] In one embodiment, the optical lens 100 satisfies the relationship fi / f5>7, where f5 is the focal length of the fifth lens L5.

[0107] In one embodiment, the optical lens 100 satisfies the relationship 1.73 < f6 / fi < 1.95, where f6 is the focal length of the sixth lens L6.

[0108] When the optical lens 100 satisfies the above relationship, it can reasonably control the ratio of the effective focal length of each lens to the effective focal length fi of the optical lens 100 in the telephoto state, so that the refractive power distribution of each lens in the optical lens 100 is appropriate, which is beneficial to correcting advanced spherical aberration and avoids excessive changes in the refractive power of a certain lens, which may cause problems in image correction of the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0109] In one embodiment, the optical lens 100 also satisfies the relationship -1.6 < f456 / f123 < -1.3, where f123 is the focal length of the fixed lens group L123 and f456 is the focal length of the movable lens group L456. In this way, the focal lengths of the movable lens group L456 and the fixed lens group L123 of the optical lens 100 can be reasonably allocated, so that the telephoto lens can balance the image quality differences between long-distance shooting and macro shooting with a small assembly sensitivity, thereby enabling the optical lens 100 to have good imaging effect.

[0110] In one embodiment, the optical lens 100 satisfies the relationship 1.05 < fi / fm < 1.15, where fm is the focal length of the optical lens 100 in the short focal length state. By reasonably controlling the ratio range of the focal length of the optical lens 100 in the telephoto and short focal length states, the focal length difference between the telephoto and short focal length states can be appropriately reduced, the movement stroke of the movable lens group L456 can be reduced, and the response time of the movable lens group L456 during focusing can be shortened.

[0111] In one embodiment, the optical lens 100 also satisfies the relationship 2.9 < fi / R1 < 3.3, where R1 is the radius of curvature of the object side surface S1 of the first lens L1 at the optical axis.

[0112] In one embodiment, the optical lens 100 also satisfies the relationship 1.1 < fi / R2 < 1.5, where R2 is the radius of curvature of the image side surface S2 of the first lens L1 at the optical axis.

[0113] In one embodiment, the optical lens 100 also satisfies the relationship R3 / fi>5, where R3 is the radius of curvature of the object side surface S3 of the second lens L2 at the optical axis.

[0114] In one embodiment, the optical lens 100 also satisfies the relationship 1.9 < fi / R4 < 2.1, where the radius of curvature of the image-side surface S4 of the second lens L2 at the optical axis is 2.1.

[0115] In one embodiment, the optical lens 100 also satisfies the relationship 0.2 < fi / |R5| < 2.2, where R5 is the radius of curvature of the object side surface S5 of the third lens L3 at the optical axis.

[0116] In one embodiment, the optical lens 100 also satisfies the relationship -4.3 < R6 / fi < -1.3, where R6 is the radius of curvature of the image-side surface S6 of the third lens L3 at the optical axis.

[0117] In one embodiment, the optical lens 100 also satisfies the relationship 0.9 < fi / R7 < 1.3, where R7 is the radius of curvature of the object side surface S7 of the fourth lens L4 at the optical axis.

[0118] In one embodiment, the optical lens 100 also satisfies the relationship -2.8 < fi / R8 < -2.2, where R8 is the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis.

[0119] In one embodiment, the optical lens 100 also satisfies the relationship 1.1 < R9 / fi < 2, where R9 is the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis.

[0120] In one embodiment, the optical lens 100 also satisfies the relationship 1.1 < R10 / fi < 1.5, where R10 is the radius of curvature of the image side surface S10 of the fifth lens L5 at the optical axis.

[0121] In one embodiment, the optical lens 100 also satisfies the relationship -1.7 < R11 / fi < -1.4, where R11 is the radius of curvature of the object side surface S11 of the sixth lens L6 at the optical axis.

[0122] In one embodiment, the optical lens 100 also satisfies the relationship 2.7 < R12 / fi < 3.3, where R12 is the radius of curvature of the image side surface S12 of the sixth lens L6 at the optical axis.

[0123] When the optical lens 100 satisfies the above relationship, it can reasonably match the ratio between the radius of curvature of the object side and image side of each lens at the optical axis and the focal length of the optical lens 100, so that the surface shape difference of each lens is reasonably set, which is conducive to controlling the shape of each lens, correcting the aberrations generated by itself and balancing astigmatism, and improving the imaging quality.

[0124] In one embodiment, the optical lens 100 also satisfies the relationship 2.1 < CT1 / CT2 < 2.4, where 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.

[0125] In one embodiment, the optical lens 100 also satisfies the relationship 0.7 < CT3 / CT4 < 1.3, where 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.

[0126] In one embodiment, the optical lens 100 satisfies the relationship 1.3 < CT5 / CT4 < 1.9, where CT5 is the thickness of the fifth lens L5 on the optical axis.

[0127] In one embodiment, the optical lens 100 satisfies the relationship 0.8 < CT5 / CT6 < 1.1, where CT6 is the thickness of the sixth lens L6 on the optical axis.

[0128] In one embodiment, the optical lens 100 also satisfies the relationship 1.2 < CT3 / CT2 < 1.9.

[0129] In one embodiment, the optical lens 100 also satisfies the relationship 1.1 < GL1 / GL2 < 1.3, where GL1 is the distance on the optical axis between the object side surface S1 of the first lens L1 and the image side surface S6 of the third lens L3, and GL2 is the distance on the optical axis between the object side surface S7 of the fourth lens L4 and the image side surface S12 of the sixth lens L6.

[0130] In one embodiment, the optical lens 100 also satisfies the relationship 1.5 < AT12 / AT23 < 2.8, where AT12 is the distance on the optical axis between the image-side surface S2 of the first lens L1 and the object-side surface S3 of the second lens L2, and AT23 is the distance on the optical axis between the image-side surface S4 of the second lens L2 and the object-side surface S5 of the third lens L3.

[0131] When the optical lens 100 satisfies the above-mentioned relationship, it can achieve better aberration correction capabilities, thus improving the image quality. It can also effectively optimize the size and refractive power of each lens, effectively avoiding excessive spherical aberration, thereby improving the overall resolving power of the optical lens 100 and reducing the sensitivity of each lens. Furthermore, it allows for a more reasonable change in the relative positions of the fixed lens group L123 and the movable lens group L456 when switching focal lengths, further ensuring good image quality in both telephoto and short-focal-length states. In addition, this configuration helps optimize the structural layout of the optical lens 100, making the entire optical lens 100 more compact and stable.

[0132] In one embodiment, the optical lens 100 also satisfies the relationship 5 < TTL / ImgH < 5.6, where TTL is the distance on the optical axis from the object side surface S1 of the first lens L1 to the imaging surface SI of the optical lens 100. By reasonably limiting the range of the ratio of the total optical length TTL to the image height ImgH of the optical lens 100, the optical lens 100 can have ultra-thin characteristics, which is more advantageous for shooting objects at mid-range focal distance and miniaturizing the camera device.

[0133] In one embodiment, the optical lens 100 also satisfies the relationship 1.05 < ImgH / SD1 < 1.2, where SD1 is the maximum effective half-aperture of the object side surface S1 of the first lens L1. Within the range defined by the relationship, the ratio of the effective half-aperture of the object side surface of the first lens L1 to the image height corresponding to the maximum field of view is guaranteed to be within a certain range, which can effectively reduce the sensitivity of the zoom system and ensure the imaging quality of the system.

[0134] In one embodiment, the optical lens 100 also satisfies the relationship 1.3 < ImgH / SD6 < 1.5, where SD6 is the maximum effective half-aperture of the image side surface S6 of the third lens L3. This ensures that the ratio of the effective half-aperture of the image side surface S6 of the third lens L3 to the image height corresponding to the maximum field of view is within a certain range, which can effectively reduce the sensitivity of the zoom system and ensure the imaging quality of the system.

[0135] In one embodiment, the optical lens 100 also satisfies the relationship 1.2 < SD1 / SD12 < 1.6, where SD12 is the maximum effective half-aperture of the image-side surface S12 of the sixth lens L6. By reasonably controlling the range of the ratio between the maximum effective aperture of the object-side surface S1 of the first lens L1 and the maximum effective half-aperture of the image-side surface S12 of the sixth lens L6, the deflection angle of the edge field of view rays entering the imaging plane SI can be effectively reduced, the matching degree between the optical lens and the imaging plane SI can be increased, and the off-axis field of view astigmatism can be improved, thereby enhancing the overall imaging quality.

[0136] In one embodiment, the optical lens 100 also satisfies the relationship 1.4 < SD1 / SD10 < 1.8, where SD10 is the maximum effective half-aperture of the image-side surface S10 of the fifth lens L5. By reasonably controlling the ratio of the maximum effective half-aperture of the object-side surface S1 of the first lens L1 to the maximum effective half-aperture of the image-side surface S16 of the eighth lens L8, the optical lens 100 has the characteristic of a small aperture, which can effectively concentrate light and allow light to enter the imaging surface of the optical lens 100 better.

[0137] In one embodiment, the optical lens 100 also satisfies the relationship 1.2 < SD12 / SD7 < 1.7, where SD7 is the maximum effective half-aperture of the object side surface S5 of the third lens L3. This makes the movable lens group L456 have the characteristic of small aperture, which can effectively concentrate the light and allow the light to enter the imaging surface SI of the optical lens 100 better.

[0138] In one embodiment, the optical lens 100 also satisfies the relationship 1.1 < BLz1 / BLz2 < 1.2, where BLz1 is the distance on the optical axis between the image-side surface S12 of the sixth lens L6 and the imaging surface SI when the optical lens 100 is in the telephoto state, and BLz2 is the distance on the optical axis between the image-side surface S16 of the sixth lens L6 and the imaging surface SI when the optical lens 100 is in the short focal state. By reasonably controlling the ratio of the distance on the optical axis between the image-side surface S12 of the sixth lens L6 and the imaging surface SI when the optical lens 100 is in the telephoto and short focal states, the focusing stroke of the movable lens group L456 on the optical axis can be appropriately reduced, thereby shortening the focusing time of the optical lens 100.

[0139] Example 1

[0140] Figure 1 This is a schematic diagram of the optical lens 100 disclosed in Embodiment 1 of this application in the telephoto state. Figure 2 for Figure 1 The diagram shows the structure of the optical lens 100 in its short focal length state. The optical lens 100 includes an aperture stop 102, a first lens L1, a second lens L2, a third lens L3, a right-angle prism P, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter 110, and a protective glass 120, arranged sequentially along the optical axis from the object side to the image side. In this configuration, the object-side surface S1 of the first lens L1 is convex near the optical axis, and the image-side surface S2 of the first lens L1 is concave near the optical axis; the object-side surface S3 of the second lens L2 is convex near the optical axis, and the image-side surface S4 of the second lens L2 is concave near the optical axis; the object-side surface S5 and the image-side surface S6 of the third lens L3 are both convex near the optical axis; the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are both concave near the optical axis; the object-side surface S9 of the fifth lens L5 is concave near the optical axis, and the image-side surface S10 of the fifth lens L5 is convex near the optical axis; and the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are both convex near the optical axis. A right-angle prism P is located between the third lens L3 and the fourth lens L4, folding the optical axis at a 90° angle.

[0141] Specifically, other parameters of the optical lens 100 are given in Table 1 below. 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 1. 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 1 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 aperture stop 102 in the "Thickness" parameter column represents the distance on the optical axis from the aperture stop 102 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 aperture stop 102 is set on the image side of the vertex of the next surface. If the thickness of the aperture stop 102 is positive, the aperture stop 102 is on the object side of the vertex of the next surface. It can be understood that the units of Y radius, thickness, and focal length in Table 1 are all mm. Moreover, the refractive index, Abbe number, etc. in Table 1 are all obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 555 nm.

[0142] Table 2 below shows the specific parameters of B, C, FNO, TTL, FOV, ImgH, and f of the optical lens 100 under different object distances A in Example 1. It should be understood that the unit of FOV in Table 2 is °, and the units of B, C, TTL, ImgH, and f are all mm. Wherein, FNO is the aperture number of the optical lens 100, TTL is the distance on the optical axis from the object side surface S1 of the first lens L1 to the imaging plane SI, FOV is the maximum aperture number of the optical lens 100, ImgH is half the image height corresponding to the maximum field of view of the optical lens 100, and f is the focal length of the optical lens 100.

[0143] Table 1

[0144] Table 2

[0145] telephoto mode Infinity 0.404 5.570 3.02 17.6 22.2 3.269 16.5 Close-focus state 200 1.234 4.740 3.09 17.6 21.1 3.269 15.1

[0146] In Example 1, the object-side surface S3 and image-side surface S4 of the second lens L2, the object-side surface S5 and image-side surface S6 of the third lens L3, the object-side surface S7 and image-side surface S8 of the fourth lens L4, the object-side surface S9 and image-side surface S10 of the fifth lens L5, and the object-side surface S11 and image-side surface S12 of the sixth lens L6 are all aspherical. Therefore, the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0147]

[0148] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the curvature of the aspherical surface at the optical axis, c = 1 / Y (i.e., the paraxial curvature c is the reciprocal of the radius of curvature Y in Table 1 above); K is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 3 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces from the first lens L1 to the sixth lens L6.

[0149] Table 3

[0150]

[0151]

[0152] Figure 3 and Figure 4 These are the field curvature (mm) and distortion (%) of the optical lens 100 disclosed in Embodiment 1 of this application in the telephoto and short focal length states, respectively. Figure 3(A) in the figure is the field curve diagram of optical lens 100 in telephoto mode at wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm. Figure 4 Figure (A) shows the field curvature diagrams of optical lens 100 in short focal length mode at wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm. The x-axis represents the focus shift in mm, and the y-axis represents the field of view in degrees. In the field curvature diagram, T represents the curvature of the imaging plane SI in the meridional direction, and S represents the curvature of the imaging plane SI in the sagittal direction. Figure 3 and Figure 4 As can be seen from (A) above, the field curvature of the optical lens 100 is small at the above wavelengths, the field curvature of each field of view is well corrected, and the center and edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.

[0153] Figure 3 (B) in the figure is the distortion diagram of the optical lens 100 in Example 1 at a wavelength of 470nm when in telephoto mode. Figure 4 (B) in the figure shows the distortion diagram of the optical lens 100 in Example 1 at a wavelength of 470nm in the short focal length state. The horizontal axis along the X-axis represents the distortion, and the vertical axis along the Y-axis represents the field of view, in degrees. Figure 3 and Figure 4 As can be seen from (B) in the figure, at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.

[0154] Example 2

[0155] Figure 5 This is a schematic diagram of the optical lens 100 in telephoto mode as disclosed in Embodiment 2 of this application. The surface shape of the lens and the positive and negative combination of the refractive power of the lens in Embodiment 2 are the same as those in Embodiment 1, and will not be described again.

[0156] Specifically, other parameters of the optical lens 100 are given in Table 4 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 4 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 555 nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in Embodiment 1 above, which will not be repeated here.

[0157] Table 4

[0158]

[0159]

[0160] Table 5

[0161] telephoto mode Infinity 0.438 6.170 3.10 18.2 20.1 3.269 17.5 Close-focus state 200 1.278 5.33 3.15 18.2 19.9 3.269 15.9

[0162] Table 6 provides the higher-order coefficients applicable to each aspherical mirror surface from the second lens L2 to the sixth lens L6 in Example 2, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0163] Table 6

[0164]

[0165] Please see Figure 6 and Figure 7 ,Depend on Figure 6 and Figure 7 As can be seen from the field curvature diagram (A) and distortion diagram (B) in the figure, the field curvature 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 6 and Figure 7 (A) Figure 6 and Figure 7 The wavelengths corresponding to the curves in (B) can be found in Example 1. Figure 3 (A) Figure 3 The content described in (B) will not be repeated here.

[0166] Example 3

[0167] Figure 8 This is a schematic diagram of the optical lens 100 in telephoto mode as disclosed in Embodiment 3 of this application. The surface shape of the lens and the positive and negative combination of the refractive power of the lens in Embodiment 3 are the same as the surface shape of the lens and the positive and negative combination of the refractive power of the lens in Embodiment 1, and will not be described again here.

[0168] Specifically, other parameters of the optical lens 100 are given in Table 7 below. The definitions of each parameter can be derived from the description of the foregoing embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 7 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 555 nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the foregoing Embodiment 1, which will not be repeated here.

[0169] Table 7

[0170]

[0171] Table 8

[0172] telephoto mode Infinity 0.362 5.327 2.9 17.3 22.9 3.269 16 Close-focus state 200 1.17 4.517 2.95 17.3 21.8 3.269 14.7

[0173] Table 9 provides the higher-order coefficients applicable to each aspherical mirror surface from the second lens L2 to the sixth lens L6 in Example 3, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0174] Table 9

[0175]

[0176]

[0177] Please see Figure 9 and Figure 10 ,Depend on Figure 9 and Figure 10 As can be seen from the field curvature diagram (A) and distortion diagram (B) in the figure, the field curvature 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 and Figure 10 (A) Figure 9 and Figure 10 The wavelengths corresponding to the curves in (B) can be found in Example 1. Figure 3 (A) Figure 3 The content described in (B) will not be repeated here.

[0178] Example 4

[0179] Figure 11 This is a schematic diagram of the optical lens 100 in telephoto mode as disclosed in Embodiment 4 of this application. The surface shape of the lens and the positive and negative combination of the refractive power of the lens in Embodiment 4 are the same as the surface shape of the lens and the positive and negative combination of the refractive power of the lens in Embodiment 1, and will not be described again here.

[0180] Specifically, other parameters of the optical lens 100 are given in Table 10 below. The definitions of each parameter can be derived from the description of the foregoing embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 10 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 555 nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the foregoing Embodiment 1, which will not be repeated here.

[0181] Table 10

[0182]

[0183]

[0184] Table 11

[0185] telephoto mode Infinity 0.260 5.183 2.8 16.7 23.8 3.269 15.5 Close-focus state 200 1.13 4.313 2.85 16.7 22.6 3.269 14.3

[0186] Table 12 gives the higher-order coefficients that can be used for each aspherical mirror surface from the second lens L2 to the sixth lens L6 in Example 4, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0187] Table 12

[0188]

[0189] Please see Figure 12 and Figure 13 ,Depend on Figure 12 and Figure 13 As can be seen from the field curvature diagram (A) and distortion diagram (B) in the figure, the field curvature 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 12 and Figure 13 (A) Figure 12 and Figure 13 The wavelengths corresponding to the curves in (B) can be found in Example 1. Figure 3 (A) Figure 3 The content described in (B) will not be repeated here.

[0190] Example 5

[0191] Figure 14 This is a schematic diagram of the optical lens 100 in telephoto mode as disclosed in Embodiment 5 of this application. The surface shape of the lens and the positive and negative combination of the refractive power of the lens in Embodiment 5 are the same as the surface shape of the lens and the positive and negative combination of the refractive power of the lens in Embodiment 1, and will not be described again here.

[0192] Specifically, other parameters of the optical lens 100 are given in Table 13 below. The definitions of each parameter can be derived from the description of the foregoing embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, etc., in Table 13 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 555 nm. In addition, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in the foregoing Embodiment 1, which will not be repeated here.

[0193] Table 13

[0194]

[0195] Table 14

[0196] telephoto mode Infinity 0.260 5.183 2.8 16.7 23.8 3.269 15.5 Close-focus state 200 1.13 4.313 2.85 16.7 22.6 3.269 14.3

[0197] Table 15 gives the higher-order coefficients that can be used for each aspherical mirror surface of the second lens L2 and the sixth lens L6 in Example 5, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0198] Table 15

[0199]

[0200]

[0201] Please see Figure 15 and Figure 16 ,Depend on Figure 15 and Figure 16 As can be seen from the field curvature diagram (A) and distortion diagram (B) in the figure, the field curvature 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 15 and Figure 16 (A) Figure 15 and Figure 16 The wavelengths corresponding to the curves in (B) can be found in Example 1. Figure 3 (A) Figure 3 The content described in (B) will not be repeated here.

[0202] Please refer to Table 16, which is a summary of the ratios of the various relationships in Embodiments 1 to 5 of this application.

[0203] Table 16

[0204]

[0205]

[0206] Please see Figure 17This application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any of the embodiments 1 to 5 above. The image sensor 201 is disposed on the image side of the optical lens 100. Specifically, the photosensitive surface of the image sensor 201 is located on the imaging surface 101 of the optical lens 100, and the light rays of an object incident on the photosensitive surface through the lens can be converted into an electrical signal of the image. The image sensor 201 can be a complementary metal-oxide-semiconductor (CMOS) or a charge-coupled device (CCD). The camera module 200 can be an imaging module integrated on the terminal device 300, or it can be a separate lens. It is understood that the camera module 200 with the above-described optical lens 100 has all the technical effects of the optical lens 100, that is, the camera module 200 can meet the requirements of a large field of view, high relative illumination, and miniaturized design. Since the above-mentioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0207] This application also discloses a terminal device 300, which includes a housing 301 and the aforementioned camera module 200, with the camera module 200 disposed within the housing 301. The terminal device 300 may include, but is not limited to, mobile phones, tablets, laptops, smartwatches, in-vehicle devices, drones, and surveillance cameras. Please refer to [link / reference]. Figure 18 Taking the terminal device 300 as a smartphone as an example, the housing 301 can be the back cover and / or mid-frame of the phone, and the camera module 200 can be set inside the housing 301.

[0208] It is understood that the terminal device 300 with the aforementioned camera module 200 also possesses all the technical effects of the aforementioned optical lens 100. That is, the terminal device 300 can meet the requirements of a large field of view, high relative illumination, and miniaturized design. Since the aforementioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0209] The optical lens, camera module, and terminal device disclosed in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the optical lens, camera module, and terminal device of this application and their core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An optical lens, characterized in that, There are six refractive lenses in total, and the optical lens comprises, from the object side to the image side: The first lens has positive refractive power. The object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis. The second lens has negative refractive power. The object side of the second lens is convex near the optical axis, and the image side of the second lens is concave near the optical axis. The third lens has positive refractive power, and both the object side and the image side of the third lens are convex near the optical axis. A prism is used to redirect light rays; The fourth lens has negative refractive power, and both the object-side and image-side surfaces of the fourth lens are concave near the optical axis. The fifth lens has positive refractive power. The object-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the fifth lens is convex near the optical axis. The sixth lens has positive refractive power, and both the object-side and image-side surfaces of the sixth lens are convex near the optical axis. Wherein, the first lens to the third lens are a fixed lens group, the fourth lens to the sixth lens are a movable lens group, the fixed lens group is fixed relative to the imaging surface of the optical lens, and the movable lens group is movable along the optical axis between the prism and the imaging surface; The optical lens satisfies the following relationship: 19° < FOV < 25° and 2.7 < FNO < 3.3; Wherein, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1.5 < fi / f1 < 1.7, and / or, -1.3 < fi / f2 < -1.1, and / or, 1.3 < fi / f3 < 1.4, and / or, -2.2 < fi / f4 < -1.7, and / or, fi / f5 > 7, and / or, 1.73 < f6 / fi < 1.95; Wherein, fi is the focal length of the optical lens in telephoto mode, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, and f6 is the focal length of the sixth lens.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 2.9 < fi / R1 < 3.3, and / or, 1.1 < fi / R2 < 1.5, and / or, R3 / fi > 5, and / or, 1.9 < fi / R4 < 2.1, and / or, 0.2 < fi / |R5| < 2.2, and / or, -4.3 < R6 / fi < -1.3, and / or, 0.9 < fi / R7 < 1.3, and / or, -2.8 < fi / R8 < -2.2, and / or, 1.1 < R9 / fi < 2, and / or, 1.1 < R10 / fi < 1.5, and / or, -1.7 < R11 / fi < -1.4, and / or, 2.7 < R12 / fi < 3.3; in, fi is the focal length of the optical lens in telephoto mode, R1 is the radius of curvature of the object side of the first lens at the optical axis, R2 is the radius of curvature of the image side of the first lens at the optical axis, R3 is the radius of curvature of the object side of the second lens at the optical axis, R4 is the radius of curvature of the image side of the second lens at the optical axis, R5 is the radius of curvature of the object side of the third lens at the optical axis, R6 is the radius of curvature of the image side of the third lens at the optical axis, R7 is the radius of curvature of the object side of the fourth lens at the optical axis, R8 is the radius of curvature of the image side of the fourth lens at the optical axis, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, R10 is the radius of curvature of the image side of the fifth lens at the optical axis, R11 is the radius of curvature of the object side of the sixth lens at the optical axis, and R12 is the radius of curvature of the image side of the sixth lens at the optical axis.

4. The optical lens according to claim 1, characterized in that the optical lens satisfies the following relationship: -1.6 < f456 / f123 < -1.3, and / or, 1.05 < fi / fm < 1.15; Wherein, f123 is the focal length of the fixed lens group, f456 is the focal length of the movable lens group, fi is the focal length of the optical lens in the telephoto state, and fm is the focal length of the optical lens in the short focal state.

5. The optical lens according to claim 1, characterized in that the optical lens satisfies the following relationship: 5 < TTL / ImgH < 5.6, and / or, 1.05 < 1 mg H / SD1 < 1.2, and / or, 1.3 < ImgH / SD6 < 1.5; Wherein, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, ImgH is half the image height corresponding to the maximum field of view of the optical lens, SD1 is the maximum effective half-aperture of the object side of the first lens, and SD6 is the maximum effective half-aperture of the image side of the third lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1 < FOVi / FOVm < 1.1 and 1 < FNOi / FNOm < 1.05; Wherein, FOVi is the maximum field of view of the optical lens in telephoto mode, FOVm is the maximum field of view of the optical lens in short focal length mode, FNOi is the aperture number of the optical lens in telephoto mode, and FNOm is the aperture number of the optical lens in short focal length mode.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 2.1 < CT1 / CT2 < 2.4, and / or, 0.7 < CT3 / CT4 < 1.3, and / or, 1.3 < CT5 / CT4 < 1.9, and / or, 0.8 < CT5 / CT6 < 1.1, and / or, 1.2 < CT3 / CT2 < 1.9, and / or, 1.1 < GL1 / GL2 < 1.3, and / or, 1.5 < AT12 / AT23 < 2.8; in, 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, CT6 is the thickness of the sixth lens on the optical axis, GL1 is the distance on the optical axis from the object side of the first lens to the image side of the third lens, GL2 is the distance on the optical axis from the object side of the fourth lens to the image side of the sixth lens, AT12 is the distance on the optical axis from the image side of the first lens to the object side of the second lens, and AT23 is the distance on the optical axis from the image side of the second lens to the object side of the third lens.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1.2 < SD1 / SD12 < 1.6, and / or, 1.4 < SD1 / SD10 < 1.8, and / or, 1.2 < SD12 / SD7 < 1.7, and / or, 1.1 < BLz1 / BLz2 < 1.2; in, SD1 is the maximum effective half-aperture of the object-side surface of the first lens, SD7 is the maximum effective half-aperture of the object-side surface of the fourth lens, SD10 is the maximum effective half-aperture of the image-side surface of the fifth lens, SD12 is the maximum effective half-aperture of the image-side surface of the sixth lens, BLz1 is the distance on the optical axis between the image-side surface and the imaging surface of the sixth lens when the optical lens is in telephoto mode, and BLz2 is the distance on the optical axis between the image-side surface and the imaging surface of the sixth lens when the optical lens is in short focal length mode.

9. A camera module, characterized in that, The camera module includes an image sensor and an optical lens as described in any one of claims 1-8, wherein the image sensor is disposed on the image side of the optical lens.

10. A terminal device, characterized in that, Includes the camera module as described in claim 9.

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