Optical lens, camera module and electronic equipment

Abstract

The invention relates to the technical field of optical lenses, provides an optical lens, a camera module and electronic equipment, and can solve the problem that the design difficulty of a focusing motor of a camera module in the related technology is relatively high. The optical lens comprises a front lens group and a rear lens group located on the image side of the front lens group. The front lens group comprises a first turning element and at least one positive lens located on the object side of the first turning element, the first turning element is provided with a first reflecting surface, the first reflecting surface is used for reflecting light beams penetrating through the at least one positive lens to the rear lens group, the rear lens group is a focusing lens group, and the focusing lens group is used for focusing the light beams penetrating through the at least one positive lens. The lens group can move relative to the front lens group along the optical axis of the rear lens group; the effective focal length fg0 of the front lens group and the effective focal length fA of the optical lens in a focusing long-shot state meet the following condition: fA / fg0lt; and 1.0. The method can be applied to electronic equipment such as a mobile phone.

Description

Technical Field

[0001] The present application relates to the technical field of optical lenses, and particularly relates to an optical lens, a camera module, and an electronic device. Background Art

[0002] Currently, the camera module has become one of the important components of electronic devices such as mobile phones and tablet computers. Through the camera module of the electronic device, the required photos can be easily obtained to meet people's photography needs. Among them, how to design the camera module has become an important topic in the industry.

[0003] For an optical lens of a camera module in the related art, when focusing, the entire optical lens is usually moved along the optical axis to make the imaging surface of the optical lens coincide with the photosensitive surface of the photosensitive element. However, when this optical lens switches between the state of focusing on a distant view and the state of focusing on a near view, the focusing stroke is slightly short, but the focusing motor needs to have extremely high focusing accuracy, resulting in a relatively large design difficulty for the focusing motor and being not conducive to reducing the cost of the camera module. Summary of the Invention

[0004] Embodiments of the present application provide an optical lens, a camera module, and an electronic device, which are used to solve the problem of relatively large design difficulty of the focusing motor of the camera module in the related art.

[0005] To achieve the above object, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides an optical lens, including a front lens group and a rear lens group located on the image side of the front lens group; the front lens group includes a first turning element and at least one positive lens located on the object side of the first turning element, the first turning element has a first reflection surface, and the first reflection surface is used to reflect the light beam passing through the at least one positive lens to the rear lens group, the rear lens group is a focusing lens group and can move relative to the front lens group along the optical axis of the rear lens group; the effective focal length f of the front lens group g0 and the effective focal length f of the optical lens in the state of focusing on a distant view A satisfy: f A / f g0 <1.0.

[0007] In the optical lens of the embodiment of the present application, by reasonably setting the ratio range of the effective focal length f of the optical lens A to the effective focal length f of the front lens group G0 g0 , that is, f A / f g0< 1.0, so that the focusing stroke compression ratio of the optical lens is relatively small, that is, the minimum value of the focusing stroke compression ratio of the optical lens is less than 1, which can make the focusing stroke of the optical lens relatively long when switching between the state of focusing on a near scene and the state of focusing on a far scene. In this way, the requirement for the focusing accuracy of the focusing motor can be reduced, thereby reducing the design difficulty of the focusing motor, and further facilitating the reduction of the cost of the camera module.

[0008] In some embodiments, f A / f g0 ≤ 0.38. With this setting, the optical lens can achieve a smaller object distance (that is, a smaller minimum macro distance) when in the state of focusing on a near scene.

[0009] In some embodiments, f A / f g0 ≥ 0.392. With this setting, the total length of the optical lens can be made smaller.

[0010] In some embodiments, the minimum value ξmin of the focusing stroke compression ratio of the rear lens group is ξmin = |1 - (f A / f g0 ) 2 |; ξmin satisfies: ξmin < 1.0. With this setting, it is beneficial to improve the focusing accuracy of the optical lens.

[0011] In some embodiments, ξmin ≥ 0.855. With this setting, while ensuring the focusing accuracy of the optical lens, it is beneficial to shorten the focusing stroke of the rear lens group.

[0012] In some embodiments, ξmin ≤ 0.846. With this setting, it is beneficial to further improve the focusing accuracy of the optical lens.

[0013] In some embodiments, the focusing stroke compression ratio ξ of the rear lens group satisfies: 0.74 ≤ ξ ≤ 1.15. With this setting, while ensuring the focusing accuracy of the optical lens, it is beneficial to shorten the focusing stroke of the rear lens group.

[0014] In some embodiments, when the optical lens is in the state of focusing on a near scene, ξ satisfies: ξ ≥ 0.9. With this setting, while ensuring the focusing accuracy, it is beneficial to shorten the focusing stroke when focusing on a near scene.

[0015] In some embodiments, the effective focal length f g1 of the rear lens group and the effective focal length f A of the optical lens in the state of focusing on a far scene satisfy: f A / f g1 ≥ 0.47. With this setting, the value of ξmin can be prevented from being too small, and thus the focusing stroke of the optical lens can be made smaller.

[0016] In some embodiments, f A / f g1 ≤ 1.5. With such a setting, the value of ξmin can be prevented from being too large, which is beneficial to ensuring the focusing accuracy requirements of the optical lens.

[0017] In some embodiments, the effective focal length f of the optical lens in the long-distance focusing state A and the effective focal length f of the optical lens in the short-distance focusing state B satisfy: (f A - f B ) / f A < 0.09. With such a setting, the overall length of the optical lens can be made smaller.

[0018] In some embodiments, both the front lens group and the rear lens group have positive optical power. With such a setting, it is beneficial to reduce the effective focal length of the optical lens, and thus the overall length of the optical lens can be reduced.

[0019] In some embodiments, the rear lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in the direction from the object side to the image side. The first lens has positive optical power, and the second lens has negative optical power; one of the third lens and the fourth lens has positive optical power, and the other of the third lens and the fourth lens has negative optical power; the fifth lens has negative or positive optical power. With such a setting, it is beneficial to reduce the aberration of the optical lens.

[0020] In some embodiments, the second lens includes a positive lens and a negative lens arranged at intervals. With such a setting, it is beneficial to increase the number of lens surfaces in the rear lens group, and thus beneficial to correcting the aberration of the optical lens.

[0021] In some embodiments, the first turning element is a mirror. With such a setting, the weight of the first turning element can be further reduced, and then the weight of the optical lens can be reduced. At the same time, the medium around the mirror is air, and the refractive index is relatively low compared with that of a prism. In this way, the overall length of the optical lens can be made smaller.

[0022] In some embodiments, the first turning element is a prism and has a first light incident surface and a first light exiting surface. The first light incident surface is arranged facing the side where the at least one positive lens is located, and the first light exiting surface is arranged facing the side where the rear lens group is located; among the at least one positive lens, the positive lens adjacent to the first turning element is arranged at intervals from the first light incident surface. With such a setting, the design freedom of the front lens group is increased, which is beneficial to correcting the aberration of the optical lens.

[0023] In some embodiments, the optical lens further includes a second turning element disposed on the image side of the rear lens group. The second turning element has a second reflecting surface for reflecting the light beam passing through the rear lens group to one side of the optical axis of the rear lens group. With such an arrangement, the optical path of the optical lens can be folded to reduce the size of the optical lens in the direction of the optical axis of the rear lens group.

[0024] In some embodiments, the second turning element is a mirror. With such an arrangement, the weight of the second turning element can be further reduced, and thus the weight of the optical lens can be reduced.

[0025] In some embodiments, the second turning element is a prism and has a second light incident surface and a second light exiting surface. The second light incident surface is arranged facing the side where the rear lens group is located, and the second light exiting surface is located on one side of the optical axis of the rear lens group. With such an arrangement, the prism can deflect stray light out of the photosensitive surface of the photosensitive element, which is beneficial to avoiding the formation of ghost images caused by stray light directly hitting the photosensitive surface of the photosensitive element.

[0026] Second, embodiments of the present application provide a camera module, including a photosensitive element and the optical lens described in the first aspect. The photosensitive element is disposed on the image side of the optical lens.

[0027] The beneficial effects of the camera module in the embodiments of the present application are the same as those of the optical lens in the first aspect, and will not be elaborated here.

[0028] Third, embodiments of the present application provide an electronic device, including a housing and the camera module described in the second aspect. The camera module is mounted on the housing.

[0029] The beneficial effects of the electronic device in the embodiments of the present application are the same as those of the optical lens in the first aspect, and will not be elaborated here. Description of the Drawings

[0030] Figure 1a Schematic diagram of the definition of the image-side principal plane and image-side principal point of the optical system;

[0031] Figure 1b Schematic diagram of the definition of the object-side principal plane and object-side principal point of the optical system;

[0032] Figure 1c Schematic diagram of the definition of the object distance and image distance of the optical system;

[0033] Figure 2 Schematic diagram of the back of the electronic device (mobile phone) in some embodiments of the present application;

[0034] Figure 3 ForFigure 2 A-A cross-sectional view of the electronic device in

[0035] Figure 4 Schematic diagram of the optical system of the camera module in the first embodiment of the present application;

[0036] Figure 5 Shows the principle diagrams of internal focusing and overall movement focusing of the optical lens in some embodiments of the present application;

[0037] Figure 6a For the f of the optical lens in some embodiments of the present application A / f g0 Relationship diagram with ξmin and ξ;

[0038] Figure 6b For the f of the optical lens in some embodiments of the present application A / f g0 Relationship diagram with ξmin, ξ, and the total length / effective focal length of the optical lens;

[0039] Figure 7 Schematic diagram of the optical system of the camera module in the second embodiment of the present application;

[0040] Figure 8 Schematic diagram of the optical system of the camera module in the third embodiment of the present application;

[0041] Figure 9a State diagram of the optical system of the camera module in the fourth embodiment of the present application when focusing on a distant view;

[0042] Figure 9b State diagram of the optical system of the camera module in the fourth embodiment of the present application when focusing on a near view;

[0043] Figure 9c Paraxial model diagram of the optical system of the camera module in the fourth embodiment of the present application during the focusing process;

[0044] Figure 9d Simulation effect diagram of the optical system of the camera module in the fourth embodiment of the present application when the object distance is infinite;

[0045] Figure 9e Simulation effect diagram of the optical system of the camera module in the fourth embodiment of the present application when the object distance is 250 mm;

[0046] Figure 9f Relationship curve of the effective focal length and the distance between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group of the optical lens in the fourth embodiment of the present application during the focusing process;

[0047] Figure 9gIt is the relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the fourth embodiment of the present application;

[0048] Figure 9h It is the relationship curve between the distance from the image-side principal plane of the rear lens group to the image plane and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the fourth embodiment of the present application;

[0049] Figure 9i It is the relationship curve between the focusing travel compression ratio and the object distance during the focusing process of the optical lens in the fourth embodiment of the present application;

[0050] Figure 10a It is the schematic diagram of the optical system of the camera module in the fifth embodiment of the present application;

[0051] Figure 10b It is the simulation effect diagram of the optical system of the camera module in the fifth embodiment of the present application when the object distance is infinity;

[0052] Figure 10c It is the simulation effect diagram of the optical system of the camera module in the fifth embodiment of the present application when the object distance is 250 mm;

[0053] Figure 10d It is the relationship curve between the effective focal length and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the fifth embodiment of the present application;

[0054] Figure 10e It is the relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the fifth embodiment of the present application;

[0055] Figure 10f It is the relationship curve between the distance from the image-side principal plane of the rear lens group to the image plane and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the fifth embodiment of the present application;

[0056] Figure 10g It is the relationship curve between the focusing travel compression ratio and the object distance during the focusing process of the optical lens in the fifth embodiment of the present application;

[0057] Figure 11a It is the schematic diagram of the optical system of the camera module in the sixth embodiment of the present application;

[0058] Figure 11b It is the relationship curve between the effective focal length and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the sixth embodiment of the present application;

[0059] Figure 11c It is the relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the sixth embodiment of the present application;

[0060] Figure 11d It is the relationship curve between the distance from the image-side principal plane of the rear lens group to the image plane and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the sixth embodiment of the present application;

[0061] Figure 11e It is the relationship curve between the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the sixth embodiment of the present application;

[0062] Figure 12a It is the schematic diagram of the optical system of the camera module in the seventh embodiment of the present application;

[0063] Figure 12b It is the relationship curve between the effective focal length and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the seventh embodiment of the present application;

[0064] Figure 12c It is the relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the seventh embodiment of the present application;

[0065] Figure 12d It is the relationship curve between the distance from the image-side principal plane of the rear lens group to the image plane and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the seventh embodiment of the present application;

[0066] Figure 12e It is the relationship curve between the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the seventh embodiment of the present application;

[0067] Figure 13a It is the schematic diagram of the optical system of the camera module in the eighth embodiment of the present application;

[0068] Figure 13b It is the relationship curve between the effective focal length and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the eighth embodiment of the present application;

[0069] Figure 13c It is the relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the eighth embodiment of the present application;

[0070] Figure 13d It is the relationship curve between the distance from the image-side principal plane of the rear lens group to the image plane and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the eighth embodiment of the present application;

[0071] Figure 13e It is the relationship curve between the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the eighth embodiment of the present application;

[0072] Figure 14a Schematic diagram of the optical system of the camera module in the ninth embodiment of the present application;

[0073] Figure 14b Relationship curve between the effective focal length and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the ninth embodiment of the present application;

[0074] Figure 14c Relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the ninth embodiment of the present application;

[0075] Figure 14d Relationship curve between the distance between the image-side principal plane of the rear lens group and the image plane and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the ninth embodiment of the present application;

[0076] Figure 14e Relationship curve between the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the ninth embodiment of the present application;

[0077] Figure 15a Schematic diagram of the optical system of the camera module in the tenth embodiment of the present application;

[0078] Figure 15b Relationship curve between the effective focal length and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the tenth embodiment of the present application;

[0079] Figure 15c Relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the tenth embodiment of the present application;

[0080] Figure 15d Relationship curve between the distance between the image-side principal plane of the rear lens group and the image plane and the distances between the image-side principal plane of the front lens group and the object-side principal plane of the rear lens group during the focusing process of the optical lens in the tenth embodiment of the present application;

[0081] Figure 15e Relationship curve between the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the tenth embodiment of the present application. Detailed implementation manners

[0082] The following explains and describes the relevant technical terms involved in the embodiments of the present application.

[0083] Focal power, expressed as the reciprocal of the image-space focal length (assuming the refractive index of air is approximately 1), characterizes the ability of an optical lens to deflect light rays. A lens or lens group with positive focal power has a positive focal length and has the effect of converging light rays. A lens or lens group with negative focal power has a negative focal length and has the effect of diverging light rays.

[0084] A positive lens, also known as a converging lens or convex lens, has the function of converging light rays. Convex lenses are divided into forms such as biconvex, plano-convex, and concave-convex (or positive meniscus).

[0085] A negative lens, also called a diverging lens or concave lens, has a diverging effect on light. Concave lenses are divided into forms such as biconcave, plano-concave, and convex-concave.

[0086] The optical axis refers to the axis of symmetry of an optical system. For example, the optical axis of an optical lens is the axis passing through the centers of each optical element of the optical lens; the optical axis also refers to the center line of a light beam (light column). The light beam rotates around this axis, and the optical characteristics do not change.

[0087] Focal length is a measure of the convergence or divergence of light in an optical system. Focal length is divided into image-space focal length and object-space focal length. The image-space focal length is the distance from the image-space principal plane to the image-space focus. Similarly, the object-space focal length is the distance from the object-space principal plane to the object-space focus. The focal length, effective focal length (EFL), and combined focal length described in the embodiments of this application all refer to the image-space focal length.

[0088] The principal plane of a lens (lens group), also known as the principal surface, includes the image-space principal plane and the object-space principal plane. When parallel light is incident on the lens (lens group), after refraction, the light rays will pass through the image-space focus. The refracted light rays are extended backward and intersect with the incident light rays at a point. The plane perpendicular to the optical axis passing through this point is the image-space principal plane. The intersection of the image-space principal plane and the optical axis of the optical lens is the image-space principal point; similarly, the light rays emitted from the object-space focus become parallel light after passing through the lens. The incident light rays are extended and intersect with the parallel light at a point. The plane perpendicular to the optical axis passing through this point is the object-space principal plane. The intersection of the object-space principal plane and the optical axis of the optical lens is the object-space principal point.

[0089] Such as Figure 1aAs shown in the figure, AB is an incident ray parallel to the optical axis. After passing through an optical system (which can be a single lens or a lens group formed by multiple lenses, etc.), the emerging ray E'F' intersects the optical axis at F'. According to the imaging theory of an ideal optical system, F' is the image point of an object point on the axis at infinity and is called the image-side focal point. If the incident ray AB and the emerging ray E'F' are extended in the opposite direction, the two rays will surely intersect at a point. Let this point be Q'. A plane perpendicular to the optical axis is drawn through Q' and intersects the optical axis at point H'. Then H' is called the image-side principal point, and the plane Q'H' is called the image-side principal plane. The distance between the principal point H' and the focal point F' is called the image-side focal length.

[0090] As Figure 1b shown in the figure, F is called the object-side focal point. Let the extension of the incident ray emitted from the focal point F intersect the extension of the corresponding emerging ray parallel to the optical axis at point Q. A plane perpendicular to the optical axis is drawn through point Q and intersects the optical axis at point H. Point H is called the object-side principal point of the optical system, and the plane QH is called the object-side principal plane. The distance from the object-side principal point H to the object-side focal point F is called the object-side focal length of the optical system.

[0091] The object distance, as Figure 1c shown in the figure, refers to the distance from the object plane to the object-side principal plane of the optical system and is represented by the English letter U. Among them, the optical system can be a single lens or a lens group formed by multiple lenses.

[0092] The image distance, as Figure 1c shown in the figure, refers to the distance from the image plane of the optical system to the image-side principal plane and is represented by the English letter V. Among them, the optical system can be a single lens or a lens group formed by multiple lenses.

[0093] Focusing specifically refers to adjusting the position of the lens group (i.e., the focusing lens group) in the optical lens to control the image distance, so that the image plane of the optical lens falls on the photosensitive element, making the imaging of the optical lens the clearest.

[0094] Internal Focusing (abbreviated as IF) means that when the optical lens is focusing, the focusing is completed by the movement of a focusing lens group inside the optical lens, and the total length (TTL) of the optical lens remains unchanged during focusing.

[0095] The focusing travel refers to the moving distance of the focusing lens group during the focusing process of the optical lens. For example, when the optical lens switches from focusing on a distant view to focusing on a near view, the distance that the focusing lens group moves along the optical axis is the focusing travel.

[0096] The image plane is located on the image side of all the lenses in the optical lens and is the position where the light forms an image after passing through each lens in the optical lens in turn.

[0097] A diaphragm refers to an entity that restricts the light beam in an optical system. The diaphragm can be the edge or frame of a lens or a specially set perforated screen. The functions of the diaphragm can be divided into two aspects: restricting the light beam or restricting the field of view (imaging range). The diaphragm that restricts the light beam the most in an optical system is called the aperture diaphragm, and the diaphragm that restricts the field of view (size) the most is called the field diaphragm.

[0098] The pupil is the image of the aperture diaphragm. The conjugate image of the aperture diaphragm formed by the optical system in front of the aperture diaphragm is called the entrance pupil, simply referred to as the epi; the entrance pupil diameter is the diameter of the entrance pupil.

[0099] The relative aperture is the ratio of the entrance pupil diameter D to the image-side focal length fˊ, denoted as RA, that is, RA = D / fˊ.

[0100] The F-number (Fno or F / #) is the reciprocal of the relative aperture, that is, F = fˊ / D; the smaller the F-number, the larger the aperture and the smaller the depth of field; conversely, the larger the F-number, the smaller the aperture and the larger the depth of field.

[0101] The total track length (TTL) refers to the total length from the surface of the optical lens closest to the object side to the image plane.

[0102] ImgH (Image Hight) represents half of the diagonal length of the effective photosensitive area on the photosensitive element, that is, the image height.

[0103] The Abbe number, that is, the dispersion coefficient, is the ratio of the difference in refractive indices of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0104] Aberration is the deviation between the image formed by an uncorrected optical system and the image formed by an ideal optical system. Aberrations include spherical aberration, coma, field curvature, astigmatism, distortion, and chromatic aberration.

[0105] Spherical aberration is an aberration of wide beams. The concentric light beam emitted from an on-axis point, after passing through the optical system, is no longer a concentric light beam. The light rays with different incident heights intersect the optical axis at different positions after passing through the optical system, and have different degrees of deviation from the paraxial image point (ideal image point). This deviation is called axial spherical aberration, simply referred to as spherical aberration. Due to the existence of spherical aberration, the image point on the Gaussian image plane is no longer a point but a circular blur spot, and the radius of the blur spot is called the lateral spherical aberration.

[0106] Coma belongs to the aberration of off-axis wide beams. In an optical system with coma, the image point formed by an off-axis object point on the ideal image plane is like a comet-shaped light spot. The thin light beam close to the chief ray intersects the chief ray to form a bright spot, while the image points formed by the light beam bundles with different apertures far from the chief ray are different rings far from the chief ray. Therefore, this imaging defect is called coma.

[0107] Chromatic Aberration (CA for short), optical materials have different refractive indices for light of different wavelengths. Therefore, for light rays of different colors passing through the same aperture, after passing through the optical system, they have different intersections with the optical axis. The intersections of light rays of different colors passing through different apertures with the optical axis are also different. As a result, at any image plane position, the image of an object point is a colored blurred spot. The differences in imaging position and imaging size between various colors of light are called chromatic aberration. Chromatic aberration is divided into two types: axial chromatic aberration and lateral chromatic aberration.

[0108] Axial chromatic aberration: The difference in imaging position of two colors of light for an on-axis point is called longitudinal chromatic aberration, also known as axial chromatic aberration.

[0109] Lateral chromatic aberration: The same medium has different refractive indices for different colors of light. Therefore, for off-axis object points, the lateral magnifications of different colors of light are not equal. This difference is called lateral chromatic aberration, also known as magnification chromatic aberration.

[0110] Distortion, also known as aberration, the height of the intersection of the chief ray of different fields of view with the Gaussian image plane after passing through the optical lens is not equal to the ideal image height. The difference between the two is the distortion.

[0111] Field curvature, which is used to represent the difference in the position of the sharpest image point of off-axis field light rays after passing through the optical lens group and the position of the sharpest image point of the central field in the optical axis direction. When there is field curvature, the image points beyond the paraxial region on the Gaussian plane will become blurred, and the image of a flat object becomes a rotating curved surface, and a perfect image of the object plane cannot be obtained at the image plane.

[0112] Astigmatism, the meridional image point and the sagittal image point of a thin beam of light do not coincide, and the axial distance between the two is called astigmatism.

[0113] The meridional plane is the plane formed by the chief ray emitted from an off-axis object point and the optical axis of the optical system. The light rays located in the meridional plane are collectively called meridional beams. The point formed by the meridional beams is called the meridional image point. The image plane where the meridional image point is located is called the meridional image plane.

[0114] The sagittal plane is the plane passing through the chief ray emitted from an off-axis object point and perpendicular to the meridional plane. The light rays located in the sagittal plane are collectively called sagittal beams. The point formed by the sagittal beams is called the sagittal image point. The image plane where the sagittal image point is located is called the sagittal image plane.

[0115] Next, the technical solutions in some embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings.

[0116] The present application provides an optical lens, a camera, and an electronic device. The optical lens includes a front lens group and a rear lens group, and the rear lens group is a focusing lens group. By reasonably distributing the optical power of the front lens group, the focusing accuracy of the optical lens can be improved.

[0117] The electronic device in the embodiments of the present application may be an electronic device with a camera module such as a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch), etc. Hereinafter, the electronic device in the embodiments of the present application will be specifically introduced by taking a mobile phone as an example. Other types of electronic devices may be specifically set with reference to the structure of the mobile phone embodiment, and will not be elaborated here one by one.

[0118] Figure 2 It is a schematic diagram of the back of the electronic device (mobile phone) in some embodiments of the present application. Figure 3 is Figure 2 the A-A cross-sectional view of the electronic device in Figure 4 It is a schematic diagram of the optical system of the camera module 100 in the first embodiment of the present application. As Figures 2 to 4 shown, the electronic device includes a housing 200, a display screen 300, and a camera module 100. The camera module 100 is installed on the housing 200.

[0119] In some embodiments, as Figure 3 shown, the housing 200 includes a middle frame 210 (also referred to as a front shell or a front frame) and a rear cover 220 (also referred to as a battery cover). The display screen 300 and the rear cover 220 are respectively installed on opposite sides of the middle frame 210. The rear cover 220 and the middle frame 210 enclose a first accommodation space 230. The camera module 100 is a rear camera module and is disposed in the first accommodation space 230. The light inlet of the camera module 100 is disposed opposite to the camera window 221 provided on the rear cover 220 to ensure that the camera module 100 can receive the light emitted by the object to be photographed outside the housing 200.

[0120] Among them, the camera window 221 can be directly provided on the rear cover 220; as Figure 3 shown, the camera window 221 can also be provided on the camera decorative member 222. Specifically, the camera decorative member 222 is provided on the rear cover 220. One side of the camera decorative member 222 has an opening, and a protective cover plate 223 is provided at the opening. The light-passing area of the protective cover plate 223 is the camera window 221. As Figure 3 shown, the camera decorative member 222 and the rear cover 220 may be an integral structure, but it is not limited thereto. The camera decorative member 222 may also be a split design from the rear cover 220.

[0121] The display screen 300 and the middle frame 210 enclose a second accommodation space 240, in which electronic components such as the main board 400 are arranged. The main board 400 is respectively connected to the display screen 300 and the camera module 100 through flexible circuit boards. A processor (not shown in the figure) is provided on the main board 400. The processor is used to obtain image data from the camera module 100, process the image data, and then transmit the processed signal to the display screen 300.

[0122] Among them, the middle frame 210 and the back cover 220 can be detachably connected or can be an integral structure, which is not specifically limited herein. The display screen 300 can be a liquid crystal display screen or an OLED (Organic Light-Emitting Diode) display screen, which is not specifically limited herein.

[0123] In the embodiments of the present application, the camera module 100 can be installed at the upper left corner, the middle of the upper part or the upper right corner on the back of the electronic device, which is not specifically limited herein. In addition to being installed on the back of the electronic device and used as a rear camera module, the camera module 100 can also be used as a front camera module of the electronic device.

[0124] In some embodiments, as Figure 3 and Figure 4 shown, the camera module 100 includes an optical lens 10, a photosensitive element 20, and a filter 30. The photosensitive element 20 is located on the image side of the optical lens 10. The filter 30 is located between the optical lens 10 and the photosensitive element 20, so that light can pass through the optical lens 10 and irradiate the photosensitive surface of the photosensitive element 20.

[0125] Among them, the optical lens 10 mainly uses the refraction principle of the lens to form an image, that is, the light of the photographed scene passes through the optical lens 10, forms a clear image on the focal plane of the optical lens 10, and the image of the scene is recorded by the photosensitive element 20 located at the focal plane position. The photosensitive element 20 converts the optical image into an electrical signal and transmits it to the processor, and the processor transmits the electrical signal to the display screen 300 to display the image of the photographed scene on the display screen 300.

[0126] The photosensitive element 20 (also called an image sensor) is a semiconductor chip, and the surface contains hundreds of thousands to millions of photodiodes. When irradiated by light, it will generate charges. The photosensitive element 20 can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor device (CMOS), which is not specifically limited herein.

[0127] The filter 30 is used to filter out the unnecessary wavelength bands in the light, preventing the photosensitive element 20 from generating false colors or ripples, so as to improve its effective resolution and color reducibility. In some embodiments, as Figure 3 shown, the filter 30 is an infrared filter.

[0128] Among them, as Figure 3 shown, the filter 30 can be set independently, or the filter 30 can be attached to the surface of one of the lenses or prisms of the optical lens 10 to achieve filtering, and no specific limitation is made here.

[0129] In some embodiments, as Figure 3 shown, the camera module 100 includes a camera housing 40, and the optical lens 10, the photosensitive element 20 and the filter 30 are arranged in the camera housing 40.

[0130] As Figure 4 shown, the optical lens includes a front lens group G0 and a rear lens group G1 located on the image side of the front lens group G0; the front lens group G0 includes a first turning element 14 and a positive lens ( Figure 4 the positive lens L01 in) located on the object side of the first turning element 14. The first turning element 14 has a first reflecting surface 141, and the first reflecting surface 141 is used to reflect the light beam passing through the positive lens to the rear lens group G1. The rear lens group G1 is a focusing lens group and can move relative to the front lens group G0 along the optical axis of the rear lens group G1 (the second optical axis 12 shown in the figure). The effective focal length f g0 of the front lens group G0 and the effective focal length f A of the optical lens in the long-distance focusing state satisfy: f A / f g0 <1.0.

[0131] Of course, the object side of the first turning element 14 is not limited to being provided with one positive lens, and two or more positive lenses can also be provided, or a combination of positive lenses and negative lenses can also be provided, which can be determined according to the actual situation.

[0132] In the optical lens of the embodiment of the present application, by reasonably setting the ratio range of the effective focal length f A of the optical lens to the effective focal length f g0 of the front lens group G0, that is, f A / f g0 <1.0, the focusing stroke compression ratio of the optical lens can be made relatively small, that is, the minimum value of the focusing stroke compression ratio of the optical lens is less than 1, so that the focusing stroke of the optical lens when switching between the near-distance focusing state and the long-distance focusing state can be relatively long. In this way, the requirement for the focusing accuracy of the focusing motor can be reduced, thereby reducing the design difficulty of the focusing motor, and further facilitating the reduction of the cost of the camera module.

[0133] The concept of the focusing stroke compression ratio of the optical lens will be specifically introduced below:

[0134] As Figure 5 shown, Figure 5 FIG. shows a schematic diagram for calculating the focusing stroke compression ratio of the optical lens in some embodiments of the present application. Among them, Figure 5 (2) in FIG. shows a state diagram of the optical lens in the present application embodiment when focusing on a distant view, Figure 5 (3) in FIG. shows a state diagram of the optical lens in the present application embodiment when focusing on a near view. The optical lens in the present application embodiment uses an internal focusing method for focusing.

[0135] As Figure 5 shown in (2) in FIG., d A is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens in the present application embodiment is in the state of focusing on a distant view. As Figure 5 shown in (3) in FIG., d B is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens in the present application embodiment is in the state of focusing on a near view.

[0136] Among them, d A satisfies: d A = f g0 + f g1 -(f g0 .f g1 / f A ); (1)

[0137] As Figure 5 shown in (1) in FIG., assuming that the optical lens in (2) in FIG. uses an overall moving focusing method, when the optical lens switches to the state of focusing on a near view, the focusing stroke ΔV Figure 5 of the optical lens satisfies: A

[0138] ΔV A = f A 2 / (U A0 ’ - f A ); (2)

[0139] Assuming that the optical lens in (3) in FIG. uses an overall moving focusing method, when the optical lens switches to the state of focusing on a distant view, as Figure 5 shown in (4) in FIG., at this time, the focusing stroke ΔV Figure 5 of the optical lens satisfies: B

[0140] ΔV​​B = f B 2 / (U B0 ’ - f B ); (3)

[0141] Among them, f in formula (3) B is the effective focal length of the optical lens in the present application embodiment in the near - focus state. U in formula (2) A0 ’ represents that when the distance between the image - side principal plane of the front lens group G0 and the object - side principal plane of the rear lens group G1 of the optical lens is d A , if the overall - movement focusing method is adopted, the object distance (i.e., the closest macro distance) when the optical lens enters the near - focus state. U in formula (3) B0 ’ represents that when the distance between the image - side principal plane of the front lens group G0 and the object - side principal plane of the rear lens group G1 of the optical lens is d B , if the overall - movement focusing method is adopted, the object distance (i.e., the closest macro distance) when the optical lens enters the near - focus state. Usually, U A0 ’ ≠ U B0 ’ , when the difference in the effective focal length of the optical lens is small, U A0 ’ and U B0 ’ are relatively close.

[0142] As Figure 5 shown in (3) therein, when the movement amount of the rear lens group G1 (i.e., the focusing stroke) when the optical lens enters the near - focus state is ΔX, then the focusing - stroke compression ratio ξ of the rear lens group G1 is defined as follows:

[0143] ξ = |ΔV A / ΔX|; (4)

[0144] As Figure 5 shown in (2) therein, the distance V from the image plane IMA to the image - side principal plane of the rear lens group G1 A1 satisfies:

[0145] V A1 = [(d A - f g0 ). f g1 / [(d A - f g0 ) - f g1 = f g1 - (f g1 . f A / f g0 ); (5)

[0146] As shown Figure 5 in (4) of [], the distance V from the image plane IMA to the image-side principal plane of the rear lens group G1 B1 satisfies:

[0147] V B1 = [(d B - f g0 ).f g1 / [(d B - f g0 ) - f g1 = f g1 - (f g1 .f B / f g0 ); (6)

[0148] According to the principle of keeping the image plane unchanged during the focusing process of the internal focusing optical lens from a long distance to a short distance, the movement amount ΔX of the rear lens group G1 can be calculated as follows:

[0149] ΔX = V A1 – V B1 - ΔV B ; (7)

[0150] According to the above formulas (1) to (7), through approximate processing and simplified calculation, it can be obtained that:

[0151] The minimum value ξmin of the focusing stroke compression ratio of the rear lens group G1 = |1 - (f A / f g0 ) 2 |; (8).

[0152] It can be seen from formula (8) that the minimum value ξmin of the focusing stroke compression ratio of the rear lens group G1 has a certain correlation with f A / f g0 . In the case of f A / f g0 < 1.0, the smaller f A / f g0 , the larger ξmin, and the larger ξ.

[0153] The larger the focusing stroke compression ratio ξ of the rear lens group G1 is, the smaller the focusing stroke of the rear lens group G1 is when the optical lens switches between the long-distance focusing state and the short-distance focusing state. This is beneficial for shortening the maximum moving stroke amount (Stroke) designed for the focusing motor of the rear lens group G1 (such as a voice coil motor VCM, a piezoelectric ceramic motor, a shape memory alloy motor SMA, etc.). At the same time, the structure of such an optical lens is more compact, which is conducive to the miniaturization design of the optical lens. Conversely, the smaller the focusing stroke compression ratio ξ of the rear lens group G1 is, the larger the focusing stroke of the rear lens group G1 is when the optical lens switches between the long-distance focusing state and the short-distance focusing state. The requirement for the focusing accuracy of the focusing motor can be reduced, which is conducive to reducing the design difficulty of the focusing motor.

[0154] In some embodiments, f A / f g0 ≤0.38. With such a setting, the minimum value ξmin of the focusing stroke compression ratio of the rear lens group G1 can be made larger, which is beneficial for shortening the focusing stroke of the rear lens group G1. In this way, when the optical lens is in the short-distance focusing state, a smaller object distance can be achieved (that is, the smallest macro distance is smaller). Specifically, as Figure 6a shown, Figure 6a shows the relationship diagram of f A / f g0 with ξmin and ξ in some embodiments of the present application. It can be seen from Figure 6a that when f A / f g0 is less than 0.38, the ξmin and ξ curves rise, and the left ends of the ξmin and ξ curves gradually approach 1. Thus, it can be seen that when f A / f g0 is less than 0.38, ξmin is larger.

[0155] In some embodiments, 1 > f A / f g0 ≥0.392. With such a setting, the TTL / EF curve drops, which can make the total length of the optical lens smaller, so that the structure of the optical lens is more compact, and thus is beneficial for the miniaturization of the optical lens and the camera module. Specifically, as Figure 6b shown, Figure 6b shows the relationship diagram of f A / f g0 with ξmin, ξ, and the total length (TTL) / effective focal length (EFL) of the optical lens in some embodiments of the present application. It can be seen from Figure 6b that the curve of the total length of the optical lens / effective focal length ratio gradually decreases as f A / f g0 increases. Thus, it can be seen that when 1 > f A / f g0When it is ≥0.392, the ratio of the total length of the optical lens to the effective focal length is smaller, and the total length of the optical lens is smaller.

[0156] In some embodiments, the minimum value ξmin of the focusing stroke compression ratio of the rear lens group G1 satisfies: ξmin < 1.0. With such a setting, ξmin can be reduced, and it is possible to avoid ξ being too large during the focusing process of the optical lens, which is beneficial to improving the focusing accuracy of the optical lens.

[0157] In some embodiments, ξmin ≤ 0.846. With such a setting, ξmin can be further reduced, and it is possible to avoid ξ being too large during the focusing process of the optical lens, which is beneficial to further improving the focusing accuracy of the optical lens.

[0158] In some embodiments, 1 > ξmin ≥ 0.855. With such a setting, ξmin can be made closer to 1, which is beneficial to shortening the focusing stroke of the rear lens group G1 while ensuring the focusing accuracy of the optical lens.

[0159] In some embodiments, the focusing stroke compression ratio ξ of the rear lens group G1 satisfies: 0.74 ≤ ξ ≤ 1.15. With such a setting, ξ is neither too large nor too small, which is beneficial to shortening the focusing stroke of the rear lens group G1 while ensuring the focusing accuracy of the optical lens.

[0160] In some embodiments, when the optical lens is in the near - focus state, ξ satisfies: ξ ≥ 0.9. With such a setting, it is not only beneficial to shortening the focusing stroke when focusing on a near - scene, but also ensures the focusing accuracy when the optical lens focuses on a near - scene, which is beneficial to improving the imaging quality and focusing efficiency of the camera when shooting a near - scene.

[0161] In some embodiments, the effective focal length f of the rear lens group G1 g1 and the effective focal length f of the optical lens in the far - focus state A satisfy: f A / f g1 ≥ 0.47. With such a setting, it is possible to avoid the value of f A / f g1 from being too small, thereby avoiding the value of ξmin from being too small, and further making the focusing stroke of the optical lens smaller.

[0162] Among them, f A / f g1 is related to f A / f g0 to a certain extent. The larger f A / f g1 , the smaller f A / f g0 , and the larger ξmin.

[0163] In some embodiments, fA / f g1 ≤ 1.5. With such a setting, it is possible to avoid A / f g1 from having too large a value, so that it is possible to avoid ξmin from having too large a value, which is conducive to ensuring the focusing accuracy of the optical lens.

[0164] In some embodiments, the effective focal length f of the optical lens in the long-distance focusing state A and the effective focal length f of the optical lens in the short-distance focusing state B satisfy: (f A - f B ) / f A < 0.09. With such a setting, it is possible to make the difference between the effective focal length f of the optical lens in the long-distance focusing state A and the effective focal length f of the optical lens in the short-distance focusing state B smaller, which is conducive to controlling the total length of the optical lens and making the total length of the optical lens smaller.

[0165] In some embodiments, as Figure 4 shown, the front lens group G0 and the rear lens group G1 both have positive optical powers. By setting the optical powers of the front lens group G0 and the rear lens group G1 to be positive and positive, both the front lens group G0 and the rear lens group G1 play a role in converging the light beam, which is conducive to reducing the effective focal length of the optical lens, thereby reducing the total length of the optical lens, and further conducive to miniaturizing the camera module 100.

[0166] Of course, in addition to both having positive optical powers, the optical powers of the front lens group G0 and the rear lens group G1 can also be set as follows: the front lens group G0 has a positive optical power and the rear lens group G1 has a negative optical power.

[0167] In some embodiments, as Figure 4 shown, the rear lens group G1 includes, in the direction from the object side to the image side, a first lens L11, a second lens L12, a third lens L13, a fourth lens L14, and a fifth lens L15. The first lens L11 has a positive optical power, the second lens L12 has a negative optical power, the third lens L13 has a positive optical power, the fourth lens L14 has a negative optical power, and the fifth lens L15 has a negative optical power.

[0168] By using a positive and negative combination of the optical powers of the lenses in the rear lens group G1, some aberrations can be cancelled, which is conducive to reducing the aberrations of the optical lens and ensuring the imaging quality of the optical lens. At the same time, it also avoids having too many lenses in the rear lens group G1, which is conducive to reducing the weight of the optical lens.

[0169] The above-mentioned rear lens group G1 is not limited to the above structure, and the rear lens group G1 may also include more than 5 lenses; the third lens L13, the fourth lens L14, and the fifth lens L15 are not limited to the above settings of optical power either, and may also be: the third lens L13 has a negative optical power, and the fourth lens L14 has a positive optical power. The fifth lens L15 is not limited to having a negative optical power either, and the fifth lens L15 may also have a positive optical power.

[0170] In some embodiments, as Figure 4 shown, the first turning element 14 is a prism and has a first incident surface 142 and a first exit surface 143. The first incident surface 142 is arranged facing the side where the positive lens L01 is located, and the first exit surface 143 is arranged facing the side where the rear lens group G1 is located.

[0171] Among them, the material of the prism can be a light-transmitting material such as glass or resin, and no specific limitation is made here.

[0172] In some embodiments, as Figure 4 shown, the first turning element 14 is a right-angled triangular prism, the first incident surface 142 and the first exit surface 143 are respectively the right-angled surfaces of the right-angled triangular prism, and the first reflection surface 141 is the inclined surface of the right-angled triangular prism. In addition to the right-angled triangular prism, the first turning element 14 can also be set as a prism of other shapes.

[0173] In some embodiments, as Figure 4 shown, the angle between the first reflection surface 141 and the optical axis of the rear lens group G1 (the second optical axis 12 shown in the figure) is 45°. At this time, the optical axis of the positive lens L01 (the first optical axis 11 shown in the figure) is perpendicular to the optical axis of the rear lens group G1. However, it is not limited to this, and the angle between the first reflection surface 141 and the optical axis of the rear lens group G1 can also be set to other angles according to actual needs.

[0174] In some embodiments, as Figure 4 shown, among at least one positive lens of the front lens group G0, the positive lens adjacent to the prism is arranged at a distance from the first incident surface 142, that is, the positive lens L01 is arranged at a distance from the first incident surface 142.

[0175] Compared with designing the image side surface of the positive lens L01 as a plane and attaching it to the first incident surface 142, arranging the positive lens L01 at a distance from the first incident surface 142 can increase the number of lens surfaces in the front lens group G0, increase the design freedom of the front lens group G0, and thus is beneficial to correcting the aberration of the optical lens.

[0176] In some embodiments, as Figure 4As shown, there is an air gap between the positive lens L01 and the first light incident surface 142. Of course, in addition to air, other media such as nitrogen, a transparent adhesive layer, etc. can also be between the positive lens and the first light incident surface 142, and specific limitations are not made here.

[0177] In some embodiments, the optical lens further includes a second turning element 15. The second turning element 15 is disposed on the image side of the rear lens group G1. The second turning element 15 has a second reflection surface 151, and the second reflection surface 151 is used to reflect the light beam passing through the rear lens group G1 to one side of the optical axis of the rear lens group G1. At this time, the optical lens has three optical axes, that is, the optical axis of the positive lens L01 on the object side of the first turning element 14 (the first optical axis 11), the optical axis of the rear lens group G1 (the second optical axis 12), and the optical axis of the outgoing light beam of the second turning element 15 (the third optical axis 13). The second optical axis 12 and the second optical axis 12 intersect on the second reflection surface 151, and the photosensitive element 20 and the second turning element 15 are arranged along the third optical axis 13.

[0178] By providing the second turning element 15, the optical path of the optical lens can be folded, so as to reduce the size of the optical lens in the direction of the second optical axis 12, thereby reducing the occupied space of the optical lens inside the electronic device; meanwhile, it is beneficial to control the size of the photosensitive surface (i.e., the image surface) of the photosensitive element 20 in the direction parallel to the second optical axis 12, and the photosensitive surface of the photosensitive element 20 can be designed to be larger, reducing the occupied space of the photosensitive element in the thickness direction of the electronic device.

[0179] In some embodiments, as Figure 4 shown, the second turning element 15 is a prism and has a second light incident surface 152 and a second light outgoing surface 153. The second light incident surface 152 is disposed toward the side where the rear lens group G1 is located, and the second light outgoing surface 153 is located on one side of the optical axis of the rear lens group G1 (for example Figure 4 as shown in the second light outgoing surface 153 is located below the second optical axis 12). By setting the second turning element 15 as a prism, the prism can deflect the stray light out of the photosensitive surface of the photosensitive element 20, thereby facilitating avoiding the formation of ghost images when the stray light directly irradiates on the photosensitive surface of the photosensitive element 20.

[0180] Among them, the material of the prism can be a light-transmitting material such as glass, resin, etc., and specific limitations are not made here.

[0181] In some embodiments, as Figure 4 shown, the second turning element 15 is a right-angled triangular prism. The second light incident surface 152 and the second light outgoing surface 153 are respectively the right-angled surfaces of the right-angled triangular prism, and the second reflection surface 151 is the inclined surface of the right-angled triangular prism. In addition to the right-angled triangular prism, the second turning element 15 can also be set as a prism of other shapes.

[0182] In some embodiments, as Figure 4 shown, the included angle between the second reflecting surface 151 and the second optical axis 12 is 45°, and at this time, the second optical axis 12 is perpendicular to the second optical axis 12. However, it is not limited thereto, and the included angle between the second reflecting surface 151 and the second optical axis 12 can also be set to other angles according to actual needs.

[0183] Of course, the second turning element 15 can also be a reflecting mirror. By setting the second turning element 15 as a reflecting mirror, the mass of the reflecting mirror is lighter, so that the weight of the entire optical lens can be reduced.

[0184] In some embodiments, as Figure 4 shown, the optical lens further includes a fixing cylinder 51, the rear lens group G1 is disposed in the fixing cylinder 51, and a spacer ring 52 is provided between any two adjacent ones of the first lens L11, the second lens L12, the third lens L13, the fourth lens L14, and the fifth lens L15.

[0185] Figure 7 This is a schematic diagram of the optical system of the camera module 100 in the second embodiment of the present application. Figure 7 The optical lens shown in Figure 4 is mainly different from the optical lens shown in Figure 7 in that the optical lens in

[0186] does not have the second turning element 15. In this way, the optical lens has two optical axes, namely the second optical axis 12 and the first optical axis 11, and the photosensitive element 20 is arranged along the second optical axis 12 with the optical lens. Figure 7 For the settings of other components shown in Figure 4 , specific reference can be made to the settings in

[0187] Figure 8 This is a schematic diagram of the optical system of the camera module in the third embodiment of the present application. Figure 8 The optical lens shown in Figure 7 is mainly different from the optical lens shown in Figure 7 in that the first turning element 14 in Figure 8 is a prism, and the first turning element 14 in

[0188] is a reflecting mirror, which is specifically described as follows: Figure 8 As shown in

[0189] , the first turning element 14 is a reflecting mirror. By setting the first turning element 14 as a reflecting mirror, the mass of the reflecting mirror is lighter, so that the weight of the entire optical lens can be reduced. At the same time, by setting the first turning element 14 as a reflecting mirror, the medium around the reflecting mirror is air, and the refractive index is relatively low compared with that of the prism. In this way, the total length of the optical lens can be smaller.Among them, the reflector includes a mirror body and a reflective film covering one side surface of the mirror body. Among them, the material of the mirror body can be glass, but it is not limited to this, and other materials are also possible. The reflective film can be a metal film, such as a silver film, an aluminum film, a gold film, etc.; the reflective film can also use a high-reflective dielectric film layer to achieve ultra-high reflectivity, and the reflective film can also be a hybrid reflective film of metal and dielectric.

[0190] In some embodiments, as Figure 8 shown, the angles between the first reflection surface 141 and the second optical axis 12, and between the first reflection surface 141 and the first optical axis 11 are both 45°. However, it is not limited to this, and the angles between the first reflection surface 141 and the second optical axis 12, and between the first reflection surface 141 and the first optical axis 11 can also be set to other angles according to actual needs.

[0191] Figure 9a is a state diagram of the optical system of the camera module in the fourth embodiment of the present application when focusing on a distant view, Figure 9b is a state diagram of the optical system of the camera module in the fourth embodiment of the present application when focusing on a near view. Figure 9a and Figure 9b The main difference between the optical lens shown in Figure 7 and the optical lens shown in

[0192] is as follows: the composition of the rear lens group G1 is different, which is specifically described as follows: Figure 9a and Figure 9b shown, the second lens L12 includes a positive lens L122 and a negative lens L121 arranged at intervals. Among them, the combined optical power of the positive lens L122 and the negative lens L121 is negative. With such a setting, it is equivalent to splitting the second lens L12 into the positive lens L122 and the negative lens L121, which is beneficial to increasing the number of lens surfaces in the rear lens group G1, increasing the design freedom of the rear lens group G1, and thus beneficial to correcting the aberration of the optical lens.

[0193] Among them, as Figure 9a and Figure 9b shown, the negative lens L121 can be arranged between the first lens L11 and the positive lens L122, but it is not limited to this, and the negative lens L121 can be arranged between the positive lens L122 and the third lens L13.

[0194] In some embodiments, as Figure 9a and Figure 9b shown, there is an air gap between the positive lens L122 and the negative lens L121. Of course, the medium between the positive lens L122 and the negative lens L121 is not limited to air, and it can also be other media, such as nitrogen, glue layer, etc.

[0195] Figure 9cThis is the paraxial model diagram of the optical system of the camera module in the fourth embodiment of the present application during the focusing process. As Figure 9c shown, when the optical lens switches from the state of focusing on a distant view to the state of focusing on a near view, the rear lens group G1 moves towards the direction close to the front lens group G0; when the optical lens switches from the state of focusing on a near view to the state of focusing on a distant view, the rear lens group G1 moves towards the direction away from the front lens group G0.

[0196] Next, the optical system of the camera module shown in Figure 9a and Figure 9b will be specifically described in combination with specific parameters and simulation results.

[0197] As shown in Table 4.1 and Table 4.2, Table 4.1 shows some main parameters of the optical system of the camera module in the fourth embodiment of the present application, and Table 4.2 shows the aspherical coefficients of each surface of the optical system of the camera module in the fourth embodiment of the present application.

[0198] Table 4.1

[0199]

[0200]

[0201] In the table, the unit of the parameter values of the radius of curvature, thickness, and clear aperture radius is mm. OBJ represents the object surface. The object distance is set to 1e+18 mm in the state of infinite object distance, and the object distance is set to 250 mm in the macro state. STO represents the stop, which is arranged on the first light-emitting surface 143 of the first turning element 14 and is used to limit the clear aperture size of the beam entering and control the light input amount of the optical system.

[0202] S1 represents the object-side surface of the positive lens L01, and S2 represents the image-side surface of the positive lens L01. PRISM represents the first turning element 14, which is a prism and has the function of deflecting light; S3 represents the first light-incident surface 142 of the first turning element 14, S4 represents the first reflecting surface 141 of the first turning element 14, and S5 represents the first light-emitting surface 143 of the first turning element 14; S6 represents the object-side surface of the first lens L11, and S7 represents the image-side surface of the first lens L11. S8 represents the object-side surface of the negative lens L121, and S9 represents the image-side surface of the negative lens L121. S10 represents the object-side surface of the positive lens L122, and S11 represents the image-side surface of the positive lens L122. S12 represents the object-side surface of the third lens L13, and S13 represents the image-side surface of the third lens L13. S14 represents the object-side surface of the fourth lens L14, and S15 represents the image-side surface of the fourth lens L14. S16 represents the object-side surface of the fifth lens L15, and S17 represents the image-side surface of the fifth lens L15. IRCF represents a filter, which is an infrared filter. S18 is the object-side surface of the filter, and S19 is the image-side surface of the filter. IMA represents the image plane IMAGE, and the image plane IMAGE can be the photosensitive surface of a photosensitive element.

[0203] In the table, the meaning of the value corresponding to the surface number S in the "thickness" parameter sequence n is the distance on the optical axis from the surface with surface number S n to the surface with surface number S n+1 ; the rules for the positive and negative signs in front of the thickness parameter are as follows: taking the vertex (the intersection with the optical axis) of the S n surface as the calculation origin, the vertex of the S n+1 surface is positive on the left, negative on the right, positive below, and negative above.

[0204] The radius of curvature in the table is the radius of curvature at the optical axis of the surface corresponding to the surface number; the rules for the positive and negative signs in front of the radius-of-curvature parameter are as follows: taking the vertex of the S n surface as the calculation origin, the center of the sphere is positive on the left, negative on the right, positive below, and negative above. When the radius of curvature is INF, it means that the surface corresponding to this parameter is a plane, and the radius of curvature is infinite.

[0205] The thickness parameter "-2.656" of the stop represents the distance on the optical axis between the object-side surface S6 of the first lens L11 and the stop STOP when the object distance is 1e+18 mm. The thickness parameter "-1.017" of the stop represents the distance on the optical axis between the object-side surface S6 of the first lens L11 and the stop STOP when the object distance is 250 mm. The thickness parameter "-1.936" of the fifth lens L15 represents the distance on the optical axis between the image-side surface S17 of the fifth lens L15 and the object-side surface S18 of the filter when the object distance is 1e+18 mm. The thickness parameter "-3.576" of the third lens L13 represents the distance on the optical axis between the image-side surface S17 of the fifth lens L15 and the object-side surface S18 of the filter when the object distance is 250 mm.

[0206] As can be seen from Table 4.1, for the camera in the fourth embodiment of the present application, when the object distance of the optical lens changes from infinity (distant view) to macro 250 mm (close view) of the object to be photographed, the focusing stroke of the rear lens group G1 is 1.639 mm.

[0207] In some embodiments, the aspheric surface in the optical lens can be defined by the following aspheric curve equation:

[0208]

[0209] where z is the relative distance between the point on the aspheric surface at a distance r from the optical axis and the tangent plane at the intersection of the aspheric surface and the optical axis; r is the perpendicular distance between the point on the aspheric curve and the optical axis; c is the curvature; K is the conic coefficient; A i is the i-th order aspheric coefficient, and specific values can be seen in Table 4.2.

[0210] Table 4.2

[0211] Plane number K <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 > S1 0.000E+00 -3.502E-04 4.926E-05 -4.585E-06 2.462E-07 S2 0.000E+00 -3.965E-04 5.222E-05 -4.567E-06 1.886E-07 S3 / / / / / S4 / / / / / STO / / / / / S6 0.000E+00 7.893E-04 -8.814E-05 2.331E-05 -3.458E-06 S7 0.000E+00 2.913E-03 -1.350E-03 4.990E-04 -8.192E-05 S8 0.000E+00 2.475E-03 -1.199E-03 9.091E-04 -2.140E-04 S9 0.000E+00 2.775E-03 1.473E-03 -8.319E-06 -4.999E-05 S10 0.000E+00 2.898E-03 2.475E-03 -7.360E-04 1.254E-04 S11 0.000E+00 1.644E-03 1.848E-03 -4.369E-04 7.272E-06 S12 0.000E+00 2.940E-03 8.017E-06 4.663E-05 -4.917E-05 S13 0.000E+00 3.436E-03 -2.090E-03 6.244E-04 -1.034E-04 S14 0.000E+00 -1.464E-02 -2.811E-03 1.669E-03 -3.782E-04 S15 0.000E+00 -1.720E-02 -7.932E-04 7.244E-04 -1.353E-04 S16 0.000E+00 1.003E-02 -1.415E-04 4.227E-05 -5.502E-05 S17 0.000E+00 1.460E-02 -1.027E-03 1.889E-05 2.034E-05

[0212]

[0213]

[0214] As shown in Table 4.3, Table 4.4, and Table 4.5, Table 4.3 shows some other main parameters of the optical system of the camera module in the fourth embodiment of the present application. Table 4.4 shows the focal length and ξ min value of the optical system of the camera module in the fourth embodiment of the present application when the object distance is infinity. Table 4.5 shows the focal length and ξ value of the optical system of the camera module in the fourth embodiment of the present application when the object distance is 250 mm.

[0215] Table 4.3

[0216] Parameter TTL ImgH EFL F / # f1 f2 f3 f4 f5 f6 f7 f34 Value 31.429 5.110 19.177 1.968 69.040 23.097 -7.493 9.036 13.190 -54.724 -21.136 -50.910 Unit mm mm mm / mm mm mm mm mm mm mm mm

[0217] Table 4.4 Object distance: INIFINITY

[0218] Parameter <![CDATA[f A > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d A > <![CDATA[ξ min > <![CDATA[f A / f g0 > <![CDATA[f A / f g1 > Value 19.177 69.038 24.324 5.7982 0.922 0.278 0.788 Unit mm mm mm mm

[0219] Table 4.5 Object distance: Macro = 250mm

[0220] Parameter <![CDATA[f B > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d B > ξ Value 18.8254 69.038 24.324 4.1591 0.974 Unit mm mm mm mm

[0221] In Tables 4.3 to 4.5, f1 is the focal length of the positive lens L01, f2 is the focal length of the first lens L11, f3 is the focal length of the negative lens L121, f4 is the focal length of the positive lens L122, f34 is the combined focal length of the negative lens L121 and the positive lens L122, f5 is the focal length of the third lens L13, f6 is the focal length of the fourth lens L14, f7 is the focal length of the fifth lens L15, f A is the effective focal length when the optical lens is in the state of focusing on a distant view; f B is the effective focal length when the optical lens is in the state of focusing on a near view, f g0 is the effective focal length of the front lens group G0, f g1 is the effective focal length of the rear lens group G1. d A is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a distant view (object distance is infinity); d B is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a near view (object distance is 250mm).

[0222] Among them, from the data in Tables 4.4 and 4.5, it can be obtained that: (f A - f B ) / f A = 0.0183.

[0223] Figure 9d This is the simulation effect diagram of the optical system of the camera module in the fourth embodiment of the present application when the object distance is infinity, Figure 9e This is the simulation effect diagram of the optical system of the camera module in the fourth embodiment of the present application when the object distance is 250mm. Figure 9d and Figure 9eThe longitudinal spherical aberration curve of the optical lens, the astigmatism and field curvature curves for each image height, and the distortion curve are shown. Among them, the longitudinal spherical aberration curve includes spherical aberration curves corresponding to different wavelength bands of the system (shown in the figure including 656.2725nm, 587.5618nm, 486.1327nm); its physical meaning is that the light of the corresponding wavelength emitted from the 0-degree field of view, after passing through the optical system, deviates from the ideal image point; its abscissa is the deviation value along the optical axis direction, and the ordinate is the normalized coordinate at the pupil. Figure 9d and Figure 9e The indicated values are all relatively small, and the correction of the longitudinal spherical aberration of the optical lens is relatively good. The astigmatism and field curvature diagram is used to indicate the deviation of the convergence point of the thin beam of different fields of view from the ideal imaging plane. x is the beam in the sagittal direction, y is the beam in the meridional direction, its abscissa is the deviation value along the optical axis direction, and the ordinate is the corresponding field of view. When a certain field of view value is too large, the image quality of that field of view is relatively poor or there are higher-order aberrations. Figure 9d and Figure 9e The field curvatures in the two directions shown are both relatively small, and the system has a relatively good depth of focus. The distortion diagram is used to characterize the relative deviation amount between the convergence point of the beam of different fields of view (actual image height) and the ideal image height. Figure 9d and Figure 9e The indicated deviation amount is relatively small, which can ensure that there is no obvious deformation in the picture. Therefore, the optical system of the camera module in the fourth embodiment of the present application realizes low light aberration control through reasonable surface type and gap design, etc., and obtains clear image quality.

[0224] Figure 9f This is the curve of the relationship between the effective focal length and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the fourth embodiment of the present application; as Figure 9f shown, during the process of the optical lens switching from the state of focusing on the near scene to the state of focusing on the far scene, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the effective focal length of the optical lens continuously becomes larger, and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 changes linearly with the effective focal length of the optical lens.

[0225] Figure 9g This is the curve of the relationship between the object distance and the effective focal length during the focusing process of the optical lens in the fourth embodiment of the present application. As Figure 9g shown, during the process of the optical lens switching from the state of focusing on the near scene to the state of focusing on the far scene, as the object distance increases, the effective focal length of the optical lens continuously becomes larger.

[0226] Figure 9hThis is the relationship curve of the distance between the image-side principal plane of the rear lens group G1 and the image plane IMA during the focusing process of the optical lens in the fourth embodiment of the present application, and the distances between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1. As Figure 9h shown, during the process of the optical lens switching from the state of focusing on a near scene to the state of focusing on a far scene, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the distance from the image-side principal plane of the rear lens group G1 to the image plane IMA continuously decreases, and the total length of the optical lens remains unchanged.

[0227] Figure 9i This is the relationship curve of the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the fourth embodiment of the present application. As Figure 9i shown, during the process of the optical lens switching from the state of focusing on a near scene to the state of focusing on a far scene, as the object distance increases, the focusing stroke compression ratio continuously decreases, and the lower side of the relationship curve between the focusing stroke compression ratio and the object distance approaches a line infinitely. The value corresponding to the intersection point of this line and the vertical axis is the minimum value ξ of the focusing stroke compression ratio min .

[0228] Figure 10a This is a schematic diagram of the optical system of the camera module in the fifth embodiment of the present application, Figure 10a The main difference between the optical lens shown in Figure 4 and the optical lens shown in Figure 10a is that the composition of the rear lens group G1 is different, that is: as Figure 10a shown, the second lens L12 includes a positive lens L122 and a negative lens L121 arranged at intervals. This is beneficial to increasing the number of surfaces of the lenses in the rear lens group G1, increasing the design freedom of the rear lens group G1, and thus being beneficial to correcting the aberration of the optical lens.

[0229] The following will specifically describe the optical system of the camera module shown in Figure 10a in combination with specific parameters and simulation results.

[0230] As shown in Table 5.1 and Table 5.2, Table 5.1 shows some main parameters of the optical system of the camera module in the fifth embodiment of the present application, and Table 5.2 shows the aspherical coefficients of each surface of the optical system of the camera in the fifth embodiment of the present application.

[0231] Table 5.1

[0232]

[0233]

[0234] In the table, S1 represents the object-side surface of the positive lens L01, and S2 represents the image-side surface of the positive lens L01. PRISM1 represents the first turning element 14, which is a prism and has the function of deflecting light. S3 represents the first light-incident surface 142 of the first turning element 14, S4 represents the first reflecting surface 141 of the first turning element 14, and S5 represents the first light-emitting surface 143 of the first turning element 14; S6 represents the object-side surface of the first lens L11, and S7 represents the image-side surface of the first lens L11. S8 represents the object-side surface of the negative lens L121, and S9 represents the image-side surface of the negative lens L121. S10 represents the object-side surface of the positive lens L122, and S11 represents the image-side surface of the positive lens L122. S12 represents the object-side surface of the third lens L13, and S13 represents the image-side surface of the third lens L13. S14 represents the object-side surface of the fourth lens L14, and S15 represents the image-side surface of the fourth lens L14. S16 represents the object-side surface of the fifth lens L15, and S17 represents the image-side surface of the fifth lens L15. PRISM2 represents the second turning element 15, which is a prism and has the function of deflecting light. S18 represents the second light-incident surface 152 of the second turning element 15, S19 represents the second reflecting surface 151 of the second turning element 15, and S20 represents the second light-emitting surface 153 of the second turning element 15; IRCF represents a filter, which is an infrared filter. S21 is the object-side surface of the filter, and S22 is the image-side surface of the filter. IMA represents the image plane IMAGE, and the image plane IMAGE can be the photosensitive surface of a photosensitive element.

[0235] In the table, for the "thickness" parameter sequence, the meaning of the value corresponding to the surface number S n is the distance on the optical axis from the surface with surface number S n to the surface with surface number S n+1 ; the rule for the plus or minus sign in front of the thickness parameter is as follows: taking the vertex (the intersection with the optical axis) of the S n surface as the calculation origin, if the vertex of the S n+1 surface is on the left, it is positive; if it is on the right, it is negative; if it is below, it is positive; if it is above, it is negative.

[0236] In the table, the radius of curvature is the radius of curvature of the corresponding surface number surface at the optical axis; the rule for the plus or minus sign in front of the radius of curvature parameter is as follows: taking the vertex of the S n surface as the calculation origin, if the center of the sphere is on the left, it is positive; if the center of the sphere is on the right, it is negative; if the center of the sphere is below, it is positive; if the center of the sphere is above, it is negative. When the radius of curvature is INF, it means that the surface corresponding to this parameter is a plane, and the radius of curvature is infinite.

[0237] The thickness parameter "-2.709" of the stop represents the distance on the optical axis between the object-side surface S6 of the first lens L11 and the stop STOP when the object distance is 1e+18 mm. The thickness parameter "-1.017" of the stop represents the distance on the optical axis between the object-side surface S6 of the first lens L11 and the stop STOP when the object distance is 250 mm. The thickness parameter "-1.555" of the fifth lens L15 represents the distance on the optical axis between the image-side surface S17 of the fifth lens L15 and the object-side surface S18 of the filter when the object distance is 1e+18 mm. The thickness parameter "-3.248" of the third lens L13 represents the distance on the optical axis between the image-side surface S17 of the fifth lens L15 and the second incident light surface 152 of the second turning element 15 when the object distance is 250 mm.

[0238] As can be seen from Table 5.1, for the camera in the fifth embodiment of the present application, when the object distance of the optical lens changes from infinity (distant view) to macro 250 mm (close view) of the object to be photographed, the focusing stroke of the rear lens group G1 is 1.699 mm.

[0239] Table 5.2

[0240]

[0241]

[0242] As shown in Table 5.3, Table 5.4, and Table 5.5, Table 5.3 shows some other main parameters of the optical system of the camera module in the fifth embodiment of the present application. Table 5.4 shows the focal length and ξ value of the optical system of the camera module in the fifth embodiment of the present application when the object distance is infinity. min value, and Table 5.5 shows the focal length and ξ value of the optical system of the camera module in the fifth embodiment of the present application when the object distance is 250 mm.

[0243] Table 5.3

[0244] Parameter TTL ImgH EFL F / # f1 f2 f3 f4 f5 f6 f7 f34 Value 31.508 5.110 19.112 1.950 58.350 22.520 -7.570 9.082 12.751 -47.042 -17.062 -44.294 Unit mm mm mm / mm mm mm mm mm mm mm mm

[0245] Table 5.4 Object distance: INIFINITY

[0246] Parameter <![CDATA[f A > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d A > <![CDATA[ξ min > <![CDATA[f A / f g0 > <![CDATA[f A / f g1 > Value 19.002 58.353 28.225 -0.0981 0.894 0.326 0.673 Unit mm mm mm mm

[0247] Table 5.5 Object distance: Macro = 250 mm

[0248] Parameter <![CDATA[f B > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d B > ξ Value 18.6366 58.353 28.225 -1.7975 0.921 Unit mm mm mm mm

[0249] In Tables 5.3 to 5.5, f1 is the focal length of the positive lens L01, f2 is the focal length of the first lens L11, f3 is the focal length of the negative lens L121, f4 is the focal length of the positive lens L122, f34 is the combined focal length of the negative lens L121 and the positive lens L122, f5 is the focal length of the third lens L13, f6 is the focal length of the fourth lens L14, f7 is the focal length of the fifth lens L15, f A is the effective focal length of the optical lens when focusing on a distant scene; f B is the effective focal length of the optical lens when focusing on a near scene, f g0 is the effective focal length of the front lens group G0, f g1 is the effective focal length of the rear lens group G1. d A is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a distant scene (the object distance is infinity); d B is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a near scene (the object distance is 250 mm).

[0250] Among them, from the data in Tables 5.4 and 5.5, it can be obtained that: (f A -f B ) / f A = 0.0192.

[0251] Figure 10b is the simulation effect diagram of the optical system of the camera module in the fifth embodiment of the present application when the object distance is infinity, Figure 10c is the simulation effect diagram of the optical system of the camera module in the fifth embodiment of the present application when the object distance is 250 mm. Figure 10b and Figure 10c show the longitudinal spherical aberration curve of the optical lens, the astigmatism and field curvature curves of each image height, and the distortion curve. Among them, the longitudinal spherical aberration curve includes spherical aberration curves corresponding to different wavelength bands of the system (the figure shows 656.2725 nm, 587.5618 nm, 486.1327 nm); its physical meaning is that the light of the corresponding wavelength emitted from the 0-degree field of view, after passing through the optical system, the deviation from the ideal image point; its abscissa is the deviation value along the optical axis direction, and the ordinate is the normalized coordinate at the pupil. Figure 10b and Figure 10cThe middle indicated values are all relatively small, and the correction of the axial spherical aberration of the optical lens is relatively good. The astigmatism field curvature diagram is used to indicate the deviation of the converging point of the thin beam in different fields of view from the ideal imaging plane. x is the beam in the sagittal direction, y is the beam in the meridional direction, the abscissa is the deviation value along the optical axis direction, and the ordinate is the corresponding field of view. When a certain field of view value is too large, the image quality of that field of view is relatively poor or there are high-order aberrations. Figure 10b and Figure 10c The field curvatures in the two directions shown are both relatively small, and the system has a relatively good depth of focus. The distortion diagram is used to characterize the relative deviation amount between the converging point (actual image height) of the beam in different fields of view and the ideal image height. Figure 10b and Figure 10c The indicated deviation amount is relatively small, which can ensure that there is no obvious deformation in the picture. Therefore, through reasonable surface shape and gap design, etc., the optical system of the camera module in the fifth embodiment of the present application realizes low control of light ray aberrations and obtains clear image quality.

[0252] Figure 10d This is the curve of the relationship between the effective focal length and the distances between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the fifth embodiment of the present application. As Figure 10d shown, during the process of the optical lens switching from the state of focusing on the near scene to the state of focusing on the far scene, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the effective focal length of the optical lens continuously becomes larger, and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 changes linearly with the effective focal length of the optical lens.

[0253] Figure 10e This is the curve of the relationship between the object distance and the effective focal length during the focusing process of the optical lens in the fifth embodiment of the present application. As Figure 10e shown, during the process of the optical lens switching from the state of focusing on the near scene to the state of focusing on the far scene, as the object distance increases, the effective focal length of the optical lens continuously becomes larger.

[0254] Figure 10f This is the curve of the relationship between the distance between the image-side principal plane of the rear lens group G1 and the image plane IMA and the distances between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the fifth embodiment of the present application. As Figure 10f shown, during the process of the optical lens switching from the state of focusing on the near scene to the state of focusing on the far scene, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the distance from the image-side principal plane of the rear lens group G1 to the image plane IMA continuously decreases, and the total length of the optical lens remains unchanged.

[0255] Figure 10g This is the curve of the relationship between the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the fifth embodiment of the present application. As Figure 10gAs shown, during the process of the optical lens switching from the state of focusing on the near scene to the state of focusing on the far scene, as the object distance increases, the focusing stroke compression ratio continuously decreases. The lower side of the curve of the focusing stroke compression ratio versus the object distance approaches a line infinitely. The value corresponding to the intersection of this line and the vertical axis is the minimum value ξ of the focusing stroke compression ratio. min .

[0256] Figure 11a It is a schematic diagram of the optical system of the camera module in the sixth embodiment of the present application. Figure 11a The first turning element and the second turning element in it are both prisms, and the prisms are equivalently replaced by parallel plates in the optical path. Figure 11a The optical lens shown in Figure 4 The main difference from the optical lens shown in

[0257] As Figure 11a shown, the rear lens group G1 includes a first lens L11, a second lens L12, a third lens L13, a fourth lens L14, and a fifth lens L15 in the direction from the object side to the image side. The first lens L11 has a positive optical power, the second lens L12 has a negative optical power; the third lens has a positive optical power, the fourth lens L14 has a negative optical power, and the fifth lens L15 has a negative optical power.

[0258] By combining the positive and negative optical powers of the lenses in the rear lens group G1 in this way, some aberrations can be canceled, which is beneficial to reducing the aberrations of the optical lens and ensuring the imaging quality of the optical lens. At the same time, it also avoids too many lenses in the rear lens group G1, which is beneficial to reducing the weight of the optical lens.

[0259] In some embodiments, as Figure 11a shown, the second lens L12 includes a positive lens L122 and a negative lens L121 arranged at intervals. With such a setting, it is beneficial to increase the number of surfaces of the lenses in the rear lens group G1, increase the design freedom of the rear lens group G1, and thus is beneficial to correcting the aberrations of the optical lens.

[0260] Next, the optical system of the camera module shown in Figure 11a will be specifically described in combination with specific parameters and simulation results.

[0261] As shown in Table 6.1 and Table 6.2, Table 6.1 shows some main parameters of the optical system of the camera module in the sixth embodiment of the present application, and Table 6.2 shows the aspherical coefficients of each surface of the optical system of the camera module in the sixth embodiment of the present application.

[0262] Table 6.1

[0263]

[0264]

[0265] In the table, S1 represents the object-side surface of the positive lens L01, and S2 represents the image-side surface of the positive lens L01. PRISM1 represents the first turning element 14, and the first turning element 14 is a prism with the function of deflecting light; S3 represents the first light-incident surface 142 of the first turning element 14, and S5 represents the first light-emitting surface 143 of the first turning element 14; S6 represents the object-side surface of the first lens L11, and S7 represents the image-side surface of the first lens L11. S8 represents the object-side surface of the negative lens L121, and S9 represents the image-side surface of the negative lens L121. S10 represents the object-side surface of the positive lens L122, and S11 represents the image-side surface of the positive lens L122. S12 represents the object-side surface of the third lens L13, and S13 represents the image-side surface of the third lens L13. S14 represents the object-side surface of the fourth lens L14, and S15 represents the image-side surface of the fourth lens L14. S16 represents the object-side surface of the fifth lens L15, and S17 represents the image-side surface of the fifth lens L15. PRISM2 represents the second turning element 15, and the second turning element 15 is a prism with the function of deflecting light; S18 represents the second light-incident surface 152 of the second turning element 15, and S19 represents the second light-emitting surface 153 of the second turning element 15; IRCF represents a filter, and the filter is an infrared filter. S20 is the object-side surface of the filter, and S21 is the image-side surface of the filter. IMA represents the image plane IMAGE, and the image plane IMAGE can be the photosensitive surface of a photosensitive element.

[0266] In the "thickness" parameter sequence in the table, the meaning of the value corresponding to the surface number S n is the distance on the optical axis from the surface with the surface number S n to the surface with the surface number S n+1 ; the rule for the plus or minus sign in front of the thickness parameter is as follows: taking the vertex (the intersection point with the optical axis) of the S n surface as the calculation origin, the vertex of the S n+1 surface is positive on the right and negative on the left.

[0267] The radius of curvature in the table is the radius of curvature of the surface corresponding to the surface number at the optical axis; the rule for the plus or minus sign in front of the radius of curvature parameter is as follows: taking the vertex of the S n surface as the calculation origin, the center of the sphere is positive on the right and negative on the left. When the radius of curvature is INF, it means that the surface corresponding to this parameter is a plane, and the radius of curvature is infinite.

[0268] Table 6.2

[0269]

[0270]

[0271] Plane number <![CDATA[A3]]> <![CDATA[A4]]> <![CDATA[A5]]> <![CDATA[A6]]> <![CDATA[A7]]> <![CDATA[A8]]> OBJ 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S1 -1.177E-03 1.027E-03 -2.939E-04 2.090E-04 0.000E+00 0.000E+00 S2 -1.340E-03 7.147E-04 -2.900E-04 8.702E-05 -9.448E-06 -1.514E-06 S3 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S4 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S5 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S6 5.302E-04 -2.265E-04 1.853E-04 -4.352E-05 1.252E-05 0.000E+00 S7 2.253E-03 -1.550E-03 7.961E-04 -8.462E-05 0.000E+00 0.000E+00 S8 -1.146E-03 -3.856E-04 6.182E-05 1.584E-04 -4.618E-05 0.000E+00 S9 -6.928E-03 2.679E-03 -9.164E-04 2.229E-04 -3.580E-05 0.000E+00 S10 -4.896E-03 2.364E-04 1.328E-03 -5.033E-04 3.568E-05 0.000E+00 S11 2.047E-03 -1.572E-03 3.901E-03 -2.129E-03 6.206E-04 0.000E+00 S12 1.791E-02 -1.496E-02 6.155E-03 -1.745E-03 4.216E-04 0.000E+00 S13 2.080E-03 -1.437E-03 2.636E-04 -6.083E-05 4.603E-05 0.000E+00 S14 -1.257E-02 1.097E-02 -4.250E-03 2.892E-03 -1.331E-03 0.000E+00 S15 1.954E-02 -6.304E-03 2.689E-03 -4.171E-03 -4.324E-03 0.000E+00 S16 2.086E-02 -1.292E-02 6.360E-03 -6.614E-04 1.689E-04 -8.284E-05 S17 8.374E-03 -6.669E-03 3.919E-03 -1.931E-03 5.561E-04 -1.610E-04 S18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S19 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S21 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S22 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0272] Table 6.3

[0273]

[0274] Table 6.4 Object distance: INIFINITY

[0275] Parameter <![CDATA[f A > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d A > <![CDATA[ξ min > <![CDATA[f A / f g0 > <![CDATA[f A / f g1 > Value 19.176 65.000 18.507 20.7738 0.913 0.295 1.036 Unit mm mm Mm mm

[0276] Table 6.5 Object distance: Macro = 59.385mm

[0277] Parameter <![CDATA[f B > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d B > ξ Value 17.502 65.000 18.507 14.7739 1.139 Unit mm mm mm mm

[0278] In Tables 6.3 to 6.5, f1 is the focal length of the positive lens L01, f2 is the focal length of the first lens L11, f3 is the focal length of the negative lens L121, f4 is the focal length of the positive lens L122, f34 is the combined focal length of the negative lens L121 and the positive lens L122, f5 is the focal length of the third lens L13, f6 is the focal length of the fourth lens L14, f7 is the focal length of the fifth lens L15, f A is the effective focal length when the optical lens is in the state of focusing on a distant view; f B is the effective focal length when the optical lens is in the state of focusing on a near view, f g0 is the effective focal length of the front lens group G0, f g1 is the effective focal length of the rear lens group G1. d A is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a distant view (object distance is infinity); d B is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a near view (object distance is 59.385mm).

[0279] Among them, from the data in Tables 6.4 and 6.5, it can be obtained that: (f A -f B ) / f A = 0.087.

[0280] Figure 11b This is the curve of the relationship between the effective focal length and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the sixth embodiment of the present application, as shown in Figure 11bAs shown, during the process of the optical lens switching from the state of focusing on a nearby scene to the state of focusing on a distant scene, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the effective focal length of the optical lens continuously becomes larger, and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 changes linearly with the effective focal length of the optical lens.

[0281] Figure 11c This is the relationship curve between the object distance and the effective focal length of the optical lens in the sixth embodiment of the present application during the focusing process. As Figure 11c shown, during the process of the optical lens switching from the state of focusing on a nearby scene to the state of focusing on a distant scene, as the object distance increases, the effective focal length of the optical lens continuously becomes larger.

[0282] Figure 11d This is the relationship curve between the distance between the image-side principal plane of the rear lens group G1 and the image plane IMA and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 of the optical lens in the sixth embodiment of the present application during the focusing process. As Figure 11d shown, during the process of the optical lens switching from the state of focusing on a nearby scene to the state of focusing on a distant scene, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the distance from the image-side principal plane of the rear lens group G1 to the image plane IMA continuously decreases, and the total length of the optical lens remains unchanged.

[0283] Figure 11e This is the relationship curve between the focusing stroke compression ratio and the object distance of the optical lens in the sixth embodiment of the present application during the focusing process. As Figure 11e shown, during the process of the optical lens switching from the state of focusing on a nearby scene to the state of focusing on a distant scene, as the object distance increases, the focusing stroke compression ratio continuously decreases, and the lower side of the relationship curve between the focusing stroke compression ratio and the object distance infinitely approaches a line, and the value corresponding to the intersection of this line and the vertical axis is the minimum value ξ of the focusing stroke compression ratio min .

[0284] Figure 12a This is a schematic diagram of the optical system of the camera module in the seventh embodiment of the present application. Figure 12a The first turning element in [[ ]] is a prism, and the prism is equivalently replaced by a parallel plate in the optical path. Figure 12a The main difference between the optical lens shown in [[ ]] and the optical lens shown in [[ ]] is that: Figure 11a The optical lens in [[ ]] does not have a second turning element 15, and the photosensitive element and the optical lens are arranged along the second optical axis 12. Figure 12a

[0285] The following will specifically describe the optical system of the camera module shown in [[ ]] in combination with specific parameters and simulation results. Figure 12a

[0286] ​​As shown in Table 7.1 and Table 7.2, Table 7.1 shows some main parameters of the optical system of the camera module in the seventh embodiment of the present application, and Table 7.2 shows the aspherical coefficients of each surface of the optical system of the camera module in the seventh embodiment of the present application.

[0287] Table 7.1

[0288]

[0289]

[0290] In the table, S1 represents the object-side surface of the positive lens L01, and S2 represents the image-side surface of the positive lens L01. PRISM represents the first turning element 14, and the first turning element 14 is a prism with a light-ray turning function; S3 represents the first light-incident surface 142 of the first turning element 14, and S5 represents the first light-emitting surface 143 of the first turning element 14; S7 represents the object-side surface of the first lens L11, and S8 represents the image-side surface of the first lens L11. S9 represents the object-side surface of the second lens L12, and S10 represents the image-side surface of the second lens L12. S11 represents the object-side surface of the third lens L13, and S12 represents the image-side surface of the third lens L13. S13 represents the object-side surface of the fourth lens L14, and S14 represents the image-side surface of the fourth lens L14. S15 represents the object-side surface of the fifth lens L15, and S16 represents the image-side surface of the fifth lens L15; IRCF represents a filter, and the filter is an infrared filter. S17 is the object-side surface of the filter, and S18 is the image-side surface of the filter. IMA represents the image plane IMAGE, and the image plane IMAGE can be the photosensitive surface of the photosensitive element.

[0291] In the table, the meaning of the value corresponding to the surface number S in the "thickness" parameter sequence is the distance on the optical axis from the surface with the surface number S to the surface with the surface number S. n The meaning of the value corresponding to the surface number S in the table is the distance on the optical axis from the surface with the surface number S to the surface with the surface number S. n from the surface with the surface number S n+1 to the surface with the surface number S. The rule for the positive and negative signs in front of the thickness parameter is as follows: taking the vertex (the intersection with the optical axis) of the S n surface as the calculation origin, the vertex of the S n+1 surface is positive on the right and negative on the left.

[0292] The radius of curvature in the table is the radius of curvature at the optical axis of the surface corresponding to the surface number. The rule for the positive and negative signs in front of the radius-of-curvature parameter is as follows: taking the vertex of the S n surface as the calculation origin, the center of the sphere is positive on the right and negative on the left. A radius of curvature of INF represents that the surface corresponding to this parameter is a plane, and the radius of curvature is infinite.

[0293] Table 7.2

[0294]

[0295]

[0296] Plane number <![CDATA[A 10 > <![CDATA[A 12 > <![CDATA[A 14 > <![CDATA[A 16 > OBJ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S1 -9.08E-05 9.71E-06 -5.40E-07 1.21E-08 S2 -1.94E-04 2.50E-05 -1.68E-06 4.57E-08 S3(STO) 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S4 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 4.08E-04 -1.13E-04 1.52E-05 -7.79E-07 S8 2.83E-03 -1.02E-03 1.91E-04 -1.39E-05 S9 1.03E-03 -4.73E-04 1.17E-04 -1.06E-05 S10 -8.66E-03 3.12E-03 -5.41E-04 3.43E-05 S11 -1.43E-02 2.90E-03 -2.18E-04 1.40E-06 S12 -8.77E-03 1.25E-03 1.17E-05 -1.16E-05 S13 9.26E-03 -2.67E-03 3.99E-04 -2.46E-05 S14 2.59E-03 -3.20E-04 -4.73E-06 3.65E-06 S15 1.40E-03 -4.10E-04 5.18E-05 -2.15E-06 S16 -7.03E-04 1.13E-04 -1.08E-05 1.06E-06 S17 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S19 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0297] Table 7.3

[0298] Parameter TTL ImgH EFL F / # f1 f2 f3 f4 f5 f6 Value 22.613 4 14.8913 2.6 39.4525 4.9041 -3.9892 -109.1950 6.4249 -8.6398 Unit mm mm mm / mm mm mm mm mm mm

[0299] Table 7.4 Object distance: INIFINITY

[0300] Parameter <![CDATA[f A > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d A > <![CDATA[ξ min > <![CDATA[f A / f g0 > <![CDATA[f A / f g1 > Value 14.8913 39.4525 20.2938 5.9806 0.858 0.377 0.734 Unit mm mm mm ​

[0301] Table 7.5 Object distance: Macro = 172.928mm

[0302] ​ <![CDATA[f B > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d B > ​ ​ 14.4811 39.4525 20.2938 4.4574 0.913 ​ ​ ​ ​ ​

[0303] In Tables 7.3 to 7.5, f1 is the focal length of the positive lens L01, f2 is the focal length of the first lens L11, f3 is the focal length of the second lens L12, f4 is the focal length of the third lens L13, f5 is the focal length of the fourth lens L14, f6 is the focal length of the fifth lens L15, f A is the effective focal length when the optical lens is in the state of focusing on a distant view; f B is the effective focal length when the optical lens is in the state of focusing on a near view, f g0 is the effective focal length of the front lens group G0, f g1 is the effective focal length of the rear lens group G1. d A is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a distant view (object distance is infinity); d B is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a near view (object distance is 172.928mm).

[0304] Among them, from the data in Tables 7.4 and 7.5, it can be obtained that: (f A - f B ) / f A = 0.0275.

[0305] ​ This is the curve of the relationship between the effective focal length and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the seventh embodiment of the present application, as ​As shown in the figure, during the process of the optical lens switching from the state of focusing on a near object to the state of focusing on a far object, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the effective focal length of the optical lens continuously becomes larger, and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 changes linearly with the effective focal length of the optical lens.

[0306] ​ This is the relationship curve between the object distance and the effective focal length of the optical lens in the seventh embodiment of the present application during the focusing process. As ​ shown, during the process of the optical lens switching from the state of focusing on a near object to the state of focusing on a far object, as the object distance increases, the effective focal length of the optical lens continuously becomes larger.

[0307] ​ This is the relationship curve between the distance between the image-side principal plane of the rear lens group G1 and the image plane IMA and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 of the optical lens in the seventh embodiment of the present application during the focusing process. As ​ shown, during the process of the optical lens switching from the state of focusing on a near object to the state of focusing on a far object, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the distance from the image-side principal plane of the rear lens group G1 to the image plane IMA continuously decreases, and the total length of the optical lens remains unchanged.

[0308] ​ This is the relationship curve between the focusing stroke compression ratio and the object distance of the optical lens in the seventh embodiment of the present application during the focusing process. As ​ shown, during the process of the optical lens switching from the state of focusing on a near object to the state of focusing on a far object, as the object distance increases, the focusing stroke compression ratio continuously decreases, and the lower side of the relationship curve between the focusing stroke compression ratio and the object distance approaches a line infinitely. The value corresponding to the intersection point of this line and the vertical axis is the minimum value ξ of the focusing stroke compression ratio min .

[0309] ​ This is a schematic diagram of the optical system of the camera module in the eighth embodiment of the present application. ​ The first turning element in ​ is a prism, and the prism is equivalently replaced by a parallel flat plate in the optical path. ​ The main difference between the optical lens shown in ​ and the optical lens shown in

[0310] is as follows: ​ The optical lens in

[0311] As shown in Table 8.1 and Table 8.2, Table 8.1 shows some main parameters of the optical system of the camera module in the eighth embodiment of the present application, and Table 8.2 shows the aspherical coefficients of each surface of the optical system of the camera module in the eighth embodiment of the present application.

[0312] Table 8.1

[0313]

[0314] In the table, S1 represents the object-side surface of the positive lens L01, and S2 represents the image-side surface of the positive lens L01. PRISM represents the first turning element 14, and the first turning element 14 is a prism with a function of deflecting light; S3 represents the first light-incident surface 142 of the first turning element 14, and S5 represents the first light-emitting surface 143 of the first turning element 14; S7 represents the object-side surface of the first lens L11, and S8 represents the image-side surface of the first lens L11. S9 represents the object-side surface of the second lens L12, and S10 represents the image-side surface of the second lens L12. S11 represents the object-side surface of the third lens L13, and S12 represents the image-side surface of the third lens L13. S13 represents the object-side surface of the fourth lens L14, and S14 represents the image-side surface of the fourth lens L14. S15 represents the object-side surface of the fifth lens L15, and S16 represents the image-side surface of the fifth lens L15; IRCF represents a filter, and the filter is an infrared filter. S17 is the object-side surface of the filter, and S18 is the image-side surface of the filter. IMA represents the image plane IMAGE, and the image plane IMAGE can be the photosensitive surface of the photosensitive element.

[0315] In the table, the meaning of the value corresponding to the surface number S in the "thickness" parameter sequence is the distance on the optical axis from the surface of surface number S to the surface of surface number S. The rule for the positive and negative signs in front of the thickness parameter is as follows: Taking the vertex (the intersection with the optical axis) of surface S as the calculation origin, if the vertex of surface S is on the right, it is positive, and if it is on the left, it is negative. n The meaning of the value corresponding to the surface number S in the table is the distance on the optical axis from the surface of surface number S to the surface of surface number S. n to the surface of surface number S n+1 The rule for the positive and negative signs in front of the thickness parameter is as follows: Taking the vertex (the intersection with the optical axis) of surface S n as the calculation origin, if the vertex of surface S n+1 is on the right, it is positive, and if it is on the left, it is negative.

[0316] The radius of curvature in the table is the radius of curvature at the optical axis of the surface corresponding to the surface number; the rule for the positive and negative signs in front of the radius of curvature parameter is as follows: Taking the vertex of surface S n as the calculation origin, if the center of the sphere is on the right, it is positive, and if the center of the sphere is on the left, it is negative. When the radius of curvature is INF, it means that the surface corresponding to this parameter is a plane, and the radius of curvature is infinite.

[0317] Table 8.2

[0318] ​ K <![CDATA[A2]]> <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> ​ 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S1 0.000E+00 0.000E+00 2.405E-03 -1.328E-03 4.750E-04 S2 0.000E+00 0.000E+00 2.920E-03 -1.888E-03 8.317E-04 ​ 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S4 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S5 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S6 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S7 0.000E+00 0.000E+00 1.780E-04 4.275E-04 -6.889E-04 S8 0.000E+00 0.000E+00 9.713E-04 4.327E-03 -4.593E-03 S9 0.000E+00 0.000E+00 -4.139E-03 2.999E-03 -1.889E-03 S10 0.000E+00 0.000E+00 1.130E-03 -7.871E-03 1.186E-02 S11 0.000E+00 0.000E+00 7.179E-03 -2.872E-02 3.051E-02 S12 0.000E+00 0.000E+00 2.153E-02 -2.980E-02 2.326E-02 S13 0.000E+00 0.000E+00 2.336E-02 6.096E-03 -1.587E-02 S14 0.000E+00 0.000E+00 2.630E-02 1.757E-03 -6.818E-03 S15 0.000E+00 0.000E+00 5.092E-03 -9.215E-03 -6.644E-05 S16 0.000E+00 0.000E+00 -1.474E-02 -4.646E-03 2.700E-03 S17 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S19 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0319]

[0320]

[0321] Table 8.3

[0322] ​ ​ ​ ​ F / # f1 f2 f3 f4 f5 f6 ​ 22.197 4 14.7892 2.6 37.7004 4.9243 -3.9875 -139.7923 6.2993 -7.9016 ​ ​ ​ ​ / ​ ​ ​ ​ ​ ​

[0323] Table 8.4 Object distance: INIFINITY

[0324] ​ <![CDATA[f A > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d A > <![CDATA[ξ min > <![CDATA[f A / f g0 > <![CDATA[f A / f g1 > ​ 14.7892 37.7004 21.577 4.2738 0.846 0.392 0.685 ​ ​ ​ ​ ​

[0325] Table 8.5 Object distance: Macro = 174.04 mm

[0326] ​ <![CDATA[f B > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d B > ​ ​ 14.3907 37.7004 21.5770 2.7506 0.900 ​ ​ ​ ​ ​

[0327] In Tables 8.3 to 8.5, f1 is the focal length of the positive lens L01, f2 is the focal length of the first lens L11, f3 is the focal length of the second lens L12, f4 is the focal length of the third lens L13, f5 is the focal length of the fourth lens L14, f6 is the focal length of the fifth lens L15, f A is the effective focal length when the optical lens is in the state of focusing on a distant view; f B is the effective focal length when the optical lens is in the state of focusing on a near view, f g0 is the effective focal length of the front lens group G0, f g1 is the effective focal length of the rear lens group G1. d A is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a distant view (object distance is infinity); d B is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a near view (object distance is 174.04 mm).

[0328] Among them, from the data in Tables 8.4 and 8.5, it can be obtained that: (f A - f B ) / f A = 0.0269.

[0329] ​ This is the curve of the relationship between the effective focal length and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the eighth embodiment of the present application. As ​ shown, during the process of the optical lens switching from the state of focusing on a near view to the state of focusing on a distant view, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the effective focal length of the optical lens continuously becomes larger, and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 changes linearly with the effective focal length of the optical lens.

[0330] ​ This is the relationship curve between the object distance and the effective focal length of the optical lens in the eighth embodiment of the present application during the focusing process. As ​ shown, when the optical lens switches from the state of focusing on the near scene to the state of focusing on the far scene, as the object distance increases, the effective focal length of the optical lens continuously increases.

[0331] ​ This is the relationship curve between the distance between the image-side principal plane of the rear lens group G1 and the image plane IMA and the distances between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 of the optical lens in the eighth embodiment of the present application during the focusing process. As ​ shown, when the optical lens switches from the state of focusing on the near scene to the state of focusing on the far scene, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, and the distance from the image-side principal plane of the rear lens group G1 to the image plane IMA continuously decreases, while the total length of the optical lens remains unchanged.

[0332] ​ This is the relationship curve between the focusing stroke compression ratio and the object distance of the optical lens in the eighth embodiment of the present application during the focusing process. As Figure 13e shown, when the optical lens switches from the state of focusing on the near scene to the state of focusing on the far scene, as the object distance increases, the focusing stroke compression ratio continuously decreases, and the lower side of the relationship curve between the focusing stroke compression ratio and the object distance infinitely approaches a line, and the value corresponding to the intersection of this line and the vertical axis is the minimum value ξ of the focusing stroke compression ratio min .

[0333] Figure 14a This is a schematic diagram of the optical system of the camera module in the ninth embodiment of the present application. Figure 14a The first turning element in Figure 14a is a prism, and the prism is equivalently replaced by a parallel flat plate in the optical path. Figure 11a The main difference between the optical lens shown in Figure 14a and the optical lens shown in

[0334] is as follows: Figure 14a The optical lens in

[0335] is not provided with a second turning element 15, and the photosensitive element 20 and the optical lens are arranged along the second optical axis 12.

[0336] Table 9.1

[0337]

[0338] In the table, S1 represents the object-side surface of the positive lens L01, and S2 represents the image-side surface of the positive lens L01. PRISM represents the first turning element 14, which is a prism and has the function of deflecting light; S3 represents the first light-incident surface 142 of the first turning element 14, and S5 represents the first light-emitting surface 143 of the first turning element 14; S7 represents the object-side surface of the first lens L11, and S8 represents the image-side surface of the first lens L11. S9 represents the object-side surface of the second lens L12, and S10 represents the image-side surface of the second lens L12. S11 represents the object-side surface of the third lens L13, and S12 represents the image-side surface of the third lens L13. S13 represents the object-side surface of the fourth lens L14, and S14 represents the image-side surface of the fourth lens L14. S15 represents the object-side surface of the fifth lens L15, and S16 represents the image-side surface of the fifth lens L15; IRCF represents a filter, which is an infrared filter, S17 is the object-side surface of the filter, and S18 is the image-side surface of the filter. IMA represents the image plane IMAGE, and the image plane IMAGE can be the photosensitive surface of a photosensitive element.

[0339] In the "thickness" parameter sequence in the table, the meaning of the value corresponding to the surface number S n is the distance on the optical axis from the surface with the surface number S n to the surface with the surface number S n+1 ; the rule for the plus or minus sign in front of the thickness parameter is as follows: taking the vertex (the intersection point with the optical axis) of the S n surface as the calculation origin, if the vertex of the S n+1 surface is on the right, it is positive, and if it is on the left, it is negative.

[0340] The radius of curvature in the table is the radius of curvature at the optical axis of the surface corresponding to the surface number; the rule for the plus or minus sign in front of the radius of curvature parameter is as follows: taking the vertex of the S n surface as the calculation origin, if the center of the sphere is on the right, it is positive, and if the center of the sphere is on the left, it is negative. When the radius of curvature is INF, it means that the surface corresponding to this parameter is a plane and the radius of curvature is infinite.

[0341] Table 9.2

[0342]

[0343]

[0344] Face number <![CDATA[A 10 > <![CDATA[A 12 > <![CDATA[A 14 > <![CDATA[A 16 > OBJ 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S1 -1.069E-04 1.183E-05 -6.820E-07 1.591E-08 S2 -2.278E-04 3.055E-05 -2.125E-06 5.968E-08 S3(STO) 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S4 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S5 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S6 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S7 4.759E-04 -1.390E-04 1.913E-05 -9.922E-07 S8 3.337E-03 -1.246E-03 2.404E-04 -1.828E-05 S9 1.210E-03 -5.765E-04 1.474E-04 -1.418E-05 S10 -1.016E-02 3.811E-03 -6.863E-04 4.209E-05 S11 -1.688E-02 3.527E-03 -2.696E-04 5.979E-06 S12 -1.027E-02 1.526E-03 1.442E-05 -1.448E-05 S13 1.086E-02 -3.261E-03 5.065E-04 -3.223E-05 S14 3.071E-03 -3.901E-04 -8.243E-06 4.755E-06 S15 1.542E-03 -5.109E-04 7.794E-05 -4.563E-06 S16 -7.959E-04 1.095E-04 -2.180E-05 2.750E-06 S17 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S18 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S19 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0345] Table 93

[0346] Parameter TTL ImgH EFL F / # f1 f2 f3 f4 f5 f6 Value 20.669 3.51 14.6592 2.7 28.8216 4.9028 -3.8949 -226.5383 6.1091 -6.8321 Unit mm mm mm / mm mm mm mm mm mm

[0347] Table 9.4 Object Distance: INIFINITY

[0348]

[0349]

[0350] Table 9.5 Object Distance: Macro = 170.191mm

[0351] Parameter <![CDATA[f B > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d B > ξ Value 14.2385 28.8216 30.2968 -2.2083 0.796 Unit mm mm mm mm

[0352] In Tables 9.3 to 9.5, f1 is the focal length of the positive lens L01, f2 is the focal length of the first lens L11, f3 is the focal length of the second lens L12, f4 is the focal length of the third lens L13, f5 is the focal length of the fourth lens L14, f6 is the focal length of the fifth lens L15, and f A is the effective focal length when the optical lens is in the state of focusing on a distant view; f B is the effective focal length when the optical lens is in the state of focusing on a near view, and f g0 is the effective focal length of the front lens group G0, and f g1 is the effective focal length of the rear lens group G1. d A is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a distant view (object distance is infinity); d B is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a near view (object distance is 170.191mm).

[0353] Among them, from the data in Tables 9.4 and 9.5, it can be obtained that: (f A - f B ) / f A = 0.0286.

[0354] Figure 14b is the relationship curve between the effective focal length and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the ninth embodiment of the present application. As Figure 14b shown, during the process of the optical lens switching from the state of focusing on a near view to the state of focusing on a distant view, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the effective focal length of the optical lens continuously becomes larger, and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 changes linearly with the effective focal length of the optical lens.

[0355] Figure 14c is the relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the ninth embodiment of the present application. As Figure 14cAs shown, during the process of the optical lens switching from the state of focusing on a near object to the state of focusing on a far object, as the object distance increases, the effective focal length of the optical lens continuously increases.

[0356] Figure 14d This is the relationship curve between the distance from the image-side principal plane of the rear lens group G1 to the image plane IMA and the distances between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the ninth embodiment of the present application. As Figure 14d shown, during the process of the optical lens switching from the state of focusing on a near object to the state of focusing on a far object, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, and the distance from the image-side principal plane of the rear lens group G1 to the image plane IMA continuously decreases, while the total length of the optical lens remains unchanged.

[0357] Figure 14e This is the relationship curve between the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the ninth embodiment of the present application. As Figure 14e shown, during the process of the optical lens switching from the state of focusing on a near object to the state of focusing on a far object, as the object distance increases, the focusing stroke compression ratio continuously decreases, and the lower side of the relationship curve between the focusing stroke compression ratio and the object distance infinitely approaches a line, and the value corresponding to the intersection point of this line and the vertical axis is the minimum value ξ of the focusing stroke compression ratio min .

[0358] Figure 15a This is a schematic diagram of the optical system of the camera module in the tenth embodiment of the present application, Figure 15a wherein the first turning element is a prism, and the prism is equivalently replaced by a parallel flat plate in the optical path. Figure 15a The main difference between the optical lens shown in Figure 11a and the optical lens shown in Figure 15a is that:

[0359] The optical lens in Figure 15a does not have a second turning element 15, and the photosensitive element and the optical lens are arranged along the second optical axis 12.

[0360] As shown in Table 10.1 and Table 10.2, Table 10.1 shows some main parameters of the optical system of the camera module in the tenth embodiment of the present application, and Table 10.2 shows the aspheric coefficients of each surface of the optical system of the camera module in the tenth embodiment of the present application.

[0361] Table 10.1

[0362]

[0363]

[0364] In the table, S1 represents the object-side surface of the positive lens L01, and S2 represents the image-side surface of the positive lens L01. PRISM represents the first turning element 14, which is a prism and has the function of deflecting light; S3 represents the first light-incident surface 142 of the first turning element 14, and S5 represents the first light-emitting surface 143 of the first turning element 14; S7 represents the object-side surface of the first lens L11, and S8 represents the image-side surface of the first lens L11. S9 represents the object-side surface of the second lens L12, and S10 represents the image-side surface of the second lens L12. S11 represents the object-side surface of the third lens L13, and S12 represents the image-side surface of the third lens L13. S13 represents the object-side surface of the fourth lens L14, and S14 represents the image-side surface of the fourth lens L14. S15 represents the object-side surface of the fifth lens L15, and S16 represents the image-side surface of the fifth lens L15; IRCF represents a filter, which is an infrared filter, S17 is the object-side surface of the filter, and S18 is the image-side surface of the filter. IMA represents the image plane IMAGE, and the image plane IMAGE can be the photosensitive surface of a photosensitive element.

[0365] In the "Thickness" parameter sequence in the table, the value corresponding to the surface number S n means the distance on the optical axis from the surface with surface number S n to the surface with surface number S n+1 ; the rule for the plus or minus sign in front of the thickness parameter is as follows: taking the vertex (the intersection with the optical axis) of the S n surface as the calculation origin, the vertex of the S n+1 surface is positive on the right and negative on the left.

[0366] The radius of curvature in the table is the radius of curvature at the optical axis of the surface corresponding to the surface number; the rule for the plus or minus sign in front of the radius of curvature parameter is as follows: taking the vertex of the S n surface as the calculation origin, the center of the sphere is positive on the right and negative on the left. A radius of curvature of INF means that the surface corresponding to this parameter is a plane, and the radius of curvature is infinite.

[0367] Table 10.2

[0368]

[0369]

[0370] Face number <![CDATA[A 10 > <![CDATA[A 12 > <![CDATA[A 14 > <![CDATA[A 16 > OBJ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S1 -2.87E-04 3.97E-05 -2.83E-06 8.46E-08 S2 -6.12E-04 1.02E-04 -8.80E-06 3.25E-07 S3(STO) 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S4 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 1.25E-03 -4.69E-04 7.98E-05 -4.80E-06 S8 8.97E-03 -4.16E-03 1.01E-03 -9.37E-05 S9 3.28E-03 -1.92E-03 6.16E-04 -7.18E-05 S10 -2.72E-02 1.27E-02 -2.87E-03 2.26E-04 S11 -4.54E-02 1.18E-02 -1.14E-03 1.74E-05 S12 -2.76E-02 5.08E-03 5.70E-05 -8.07E-05 S13 2.93E-02 -1.09E-02 2.11E-03 -1.68E-04 S14 8.25E-03 -1.31E-03 -3.63E-05 1.92E-05 S15 4.42E-03 -1.68E-03 2.70E-04 -1.56E-05 S16 -2.13E-03 4.79E-04 -5.71E-05 5.46E-06 S17 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S19 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0371] Table 10.3

[0372] Parameter TTL ImgH EFL F / # f1 f2 f3 f4 f5 f6 Value 25.921 3.51 14.6122 2.75 48.9535 3.6713 -2.7038 -11.2436 31.5748 6.7886 Unit mm mm mm / mm mm mm mm mm mm

[0373] Table 10.4 Object distance: INIFINITY

[0374] Parameter <![CDATA[f A > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d A > <![CDATA[ξ min > <![CDATA[f A / f g0 > <![CDATA[f A / f g1 > Value 14.6122 48.9535 10.1137 25.1844 0.911 0.298 1.445 Unit mm mm mm mm

[0375] Table 10.5 Object distance: Macro = 118.60 mm

[0376] Parameter <![CDATA[f B > <![CDATA[f g0 > <![CDATA[f g1 > <![CDATA[d B > ξ Value 13.9533 48.9535 10.1137 23.5844 1.008 Unit mm mm mm mm

[0377] In Tables 10.3 to 10.5, f1 is the focal length of the positive lens L01, f2 is the focal length of the first lens L11, f3 is the focal length of the second lens L12, f4 is the focal length of the third lens L13, f5 is the focal length of the fourth lens L14, f6 is the focal length of the fifth lens L15, f A is the effective focal length of the optical lens when focusing on a distant view; f B is the effective focal length of the optical lens when focusing on a near view, f g0 is the effective focal length of the front lens group G0, f g1 is the effective focal length of the rear lens group G1. d A is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a distant view (object distance is infinite); d B is the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 when the optical lens is in the state of focusing on a near view (object distance is 118.60 mm).

[0378] Among them, from the data in Tables 10.4 and 10.5, it can be obtained that: (f A - f B ) / f A = 0.045.

[0379] Figure 15b This is the relationship curve between the effective focal length and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 during the focusing process of the optical lens in the tenth embodiment of the present application. As Figure 15b shown, during the process of the optical lens switching from the state of focusing on a near view to the state of focusing on a distant view, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the effective focal length of the optical lens continuously becomes larger, and the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 changes linearly with the effective focal length of the optical lens.

[0380] Figure 15c This is the relationship curve between the object distance and the effective focal length during the focusing process of the optical lens in the tenth embodiment of the present application. As Figure 15c shown, during the process of the optical lens switching from the state of focusing on a near view to the state of focusing on a distant view, as the object distance increases, the effective focal length of the optical lens continuously becomes larger.

[0381] Figure 15dThis is a relationship curve of the distance between the image-side principal plane of the rear lens group G1 and the image plane IMA during the focusing process of the optical lens in the tenth embodiment of the present application, and the distances between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1. As Figure 15d shown, during the process of the optical lens switching from the near-focus state to the far-focus state, the distance between the image-side principal plane of the front lens group G0 and the object-side principal plane of the rear lens group G1 continuously increases, the distance from the image-side principal plane of the rear lens group G1 to the image plane IMA continuously decreases, and the total length of the optical lens remains unchanged.

[0382] Figure 15e This is a relationship curve of the focusing stroke compression ratio and the object distance during the focusing process of the optical lens in the tenth embodiment of the present application. As Figure 15e shown, during the process of the optical lens switching from the near-focus state to the far-focus state, as the object distance increases, the focusing stroke compression ratio continuously decreases, and the lower side of the relationship curve between the focusing stroke compression ratio and the object distance infinitely approaches a line, and the value corresponding to the intersection of this line and the vertical axis is the minimum value ξ of the focusing stroke compression ratio min .

[0383] The type of the cross-hatching in the drawings of the present application is for distinguishing different components and should not be construed as a limitation on the materials of the components. The drawings of the present application are for showing the structural composition and are not drawn to the scale of the actual product.

[0384] Although the description of the present application will be introduced in combination with some embodiments, this does not mean that the features of this application are limited to this implementation manner. On the contrary, the purpose of introducing the implementation manner in combination is to cover other alternatives or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the key points of the present application, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0385] In the embodiments of the present application, the terms "first", "second", "third", "fourth", "fifth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth", "fifth" may explicitly or implicitly include one or more of such features.

[0386] In the embodiments of the present application, "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this document, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0387] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The orientation terms mentioned in the embodiments of the present application, such as "upper", "lower", "left", "right", "inner", "outer", etc., are only references to the directions in the accompanying drawings. Therefore, the orientation terms are used to better and more clearly illustrate and understand the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present application. "Plurality" means at least two.

[0388] The reference to "one embodiment" or "some embodiments" etc. in this specification means that specific features, structures, or characteristics described in connection with that embodiment are included in one or more embodiments of the present application. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification are not necessarily all referring to the same embodiment, but rather mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0389] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical lens, characterized in that, It includes a front lens group (G0) and a rear lens group (G1) located on the image side of the front lens group (G0); The front lens group (G0) includes a first turning element (14) and at least one positive lens located on the object side of the first turning element (14). The first turning element (14) has a first reflecting surface (141) for reflecting the light beam passing through the at least one positive lens to the rear lens group (G1). The rear lens group (G1) is a focusing lens group and can move relative to the front lens group (G0) along the optical axis of the rear lens group (G1); The effective focal length f of the front lens group (G0) g0 and the effective focal length f of the optical lens in the far-focus state A satisfy: f A / f g0 < 1.

0.

2. The optical lens according to claim 1, wherein f A / f g0 ≤0.

38.

3. The optical lens according to claim 1, wherein f A / f g0 ≥0.392。 4. The optical lens according to any one of claims 1 to 3, wherein The minimum value ξmin of the focusing stroke compression ratio of the rear lens group (G1) = |1 - (f A / f g0 ) 2 |; ξmin satisfies: ξmin < 1.

0.

5. The optical lens according to claim 4, wherein ξmin ≥ 0.

855.

6. The optical lens according to claim 4, wherein ξmin ≤ 0.

846.

7. The optical lens according to any one of claims 1 to 6, wherein The focusing stroke compression ratio ξ of the rear lens group (G1) satisfies: 0.74 ≤ ξ ≤ 1.

15.

8. The optical lens according to claim 7, wherein When the optical lens is in the near - focus state, ξ satisfies: ξ ≥ 0.

9.

9. The optical lens according to any one of claims 1 to 8, wherein The effective focal length f of the rear lens group (G1) g1 and the effective focal length f of the optical lens in the far-focus state A satisfy the following relationship: f A / f g1 ≥0.

47.

10. The optical lens according to claim 9, wherein f A / f g1 ≤1.

5.

11. The optical lens according to any one of claims 1 to 10, wherein The effective focal length f of the optical lens in the far-focus state A and the effective focal length f of the optical lens in the near-focus state B satisfy: (f A - f B ) / f A < 0.

09.

12. The optical lens according to any one of claims 1 to 11, wherein Both the front lens group (G0) and the rear lens group (G1) have positive optical powers.

13. The optical lens according to claim 12, wherein The rear lens group (G1) includes a first lens (L11), a second lens (L12), a third lens (L13), a fourth lens (L14), and a fifth lens (L15) in the direction from the object side to the image side. The first lens (L11) has a positive optical power, and the second lens (L12) has a negative optical power; one of the third lens (L13) and the fourth lens (L14) has a positive optical power, and the other of the third lens (L13) and the fourth lens (L14) has a negative optical power; the fifth lens (L15) has a negative optical power or a positive optical power.

14. The optical lens according to claim 13, wherein The second lens (L12) includes a positive lens and a negative lens arranged at intervals.

15. The optical lens according to any one of claims 1 to 14, wherein The first turning element (14) is a reflecting mirror; Alternatively, the first turning element (14) is a prism and has a first light incident surface (142) and a first light exiting surface (143). The first light incident surface (142) is arranged facing the side where the at least one positive lens is located, and the first light exiting surface (143) is arranged facing the side where the rear lens group (G1) is located; among the at least one positive lens, the positive lens adjacent to the first turning element (14) is spaced apart from the first light incident surface (142).

16. The optical lens according to any one of claims 1 to 15, characterized in that the optical lens further includes a second turning element (15). The second turning element (15) is arranged on the image side of the rear lens group (G1). The second turning element (15) has a second reflecting surface (151), and the second reflecting surface (151) is configured to reflect the light beam passing through the rear lens group (G1) to one side of the optical axis of the rear lens group (G1).

17. The optical lens according to claim 16, characterized in that the second turning element (15) is a mirror; alternatively, the second turning element (15) is a prism and has a second light incident surface (152) and a second light exiting surface (153). The second light incident surface (152) is arranged facing the side where the rear lens group (G1) is located, and the second light exiting surface (153) is located on one side of the optical axis of the rear lens group (G1).

18. A camera module, characterized in that, comprising a photosensitive element (20) and the optical lens (10) according to any one of claims 1 to 17, wherein the photosensitive element (20) is arranged on the image side of the optical lens (10).

19. An electronic device, characterized in that, Comprising a housing (200) and the camera module (100) according to claim 18, wherein the camera module (100) is mounted on the housing (200).

Images