Optical lens, camera and electronic equipment

Abstract

The invention relates to the technical field of cameras, provides an optical lens, a camera and electronic equipment, and can solve the problem that the imaging quality of a camera is poor when the hand of a photographer shakes in the prior art. The optical lens comprises a front lens group and a rear lens group which are arranged along a direction from an object side to an image side; the front lens group comprises a first light path turning element and at least one positive lens located on the object side of the first light path turning element, the at least one positive lens is provided with a first optical axis, the rear lens group is provided with a second optical axis, and the first light path turning element is provided with a first reflecting surface; the second optical axis comprises an optical axis section, the end point of the optical axis section is located on the first reflecting surface, and the optical axis section extends towards the image side of the first reflecting surface; the front lens group is an anti-shake compensation lens group and can swing around a first rotating central shaft; the first rotating center shaft intersects with the optical axis section or is located at the position close to the optical axis section. The method can be applied to electronic equipment such as a mobile phone.

Description

Technical Field

[0001] The present application relates to the field of camera technology, and in particular to an optical lens, a camera and an electronic device. Background Art

[0002] At present, the camera has become one of the important components of electronic devices such as mobile phones and tablet computers. The camera of electronic devices can easily obtain the desired photos to meet people's needs for taking photos. With the development of electronic technology, the market demand for cameras with good imaging quality is increasing. Therefore, how to improve the imaging quality of cameras has become an important topic in the industry.

[0003] In the related art, when taking pictures, the photographer's hand will inevitably shake, which causes the projection point of the light entering the camera on the photosensitive element to deviate from the normal position, and the image on the camera's image plane is prone to drift, making the camera's image blurry, thereby reducing the camera's image quality. Summary of the invention

[0004] The embodiments of the present application provide an optical lens, a camera, and an electronic device for solving the problem of poor imaging quality of the camera in the related art when the photographer's hands are shaken.

[0005] To achieve the above objectives, 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, comprising a front lens group and a rear lens group arranged in a direction from the object side to the image side; the front lens group comprises a first optical path turning element, and at least one positive lens located on the object side of the first optical path turning element, the at least one positive lens having a first optical axis, the rear lens group having a second optical axis, the first optical path turning element having a first reflecting surface, and the angle between the first reflecting surface and the first optical axis and the angle between the first reflecting surface and the second optical axis being both acute angles; the second optical axis comprises an optical axis segment, the endpoint of the optical axis segment is located on the first reflecting surface, and the optical axis segment extends toward the image side of the first reflecting surface; the front lens group is an anti-shake compensation lens group, and can swing around a first rotation center axis; the first rotation center axis is perpendicular to the first optical axis and the second optical axis, and the first rotation center axis intersects with the optical axis segment, or is located close to the optical axis segment.

[0007] In the optical lens of the embodiment of the present application, when the electronic device takes a photo through the camera and the electronic device shakes slightly in the direction parallel to the first optical axis and the second optical axis, the front lens group swings around the first rotation center axis to compensate for the image drift on the image plane caused by the shaking of the electronic device, so that the camera can still ensure the image quality in a shaking environment. At the same time, in the process of rotating the front lens group around the first rotation center axis for anti-shake compensation, the loss of MTF of the optical lens can be reduced, thereby improving the image clarity of the optical lens.

[0008] In some embodiments, the first rotation center axis is located on the image side of the first reflective surface, and the first rotation center axis passes through an intersection point, or is located near the intersection point; wherein the intersection point is the intersection point of the first straight line and the optical axis segment, and the first straight line is parallel to the first optical axis and intersects with the bottom edge of the first reflective surface. Such an arrangement can reduce the loss of the MTF of the optical lens, thereby further improving the imaging clarity of the optical lens.

[0009] In some embodiments, the front lens group can swing around the second rotation center axis; the second rotation center axis coincides with the second optical axis; or the second rotation center axis is parallel to the second optical axis, and the second rotation center axis is located close to the second optical axis. Such an arrangement can compensate for the drift of the image plane caused by the shaking of the electronic device in the direction perpendicular to the second optical axis, so that the camera can still ensure the imaging quality in a shaking environment.

[0010] In some embodiments, the front lens group can swing around a second rotation center axis; the second rotation center axis coincides with the first optical axis; or the second rotation center axis is parallel to the first optical axis, and the second rotation center axis is located close to the first optical axis. Such an arrangement can compensate for the drift of the image plane caused by the shaking of the electronic device in a direction perpendicular to the first optical axis, so that the camera can still ensure the imaging quality in a shaking environment.

[0011] In some embodiments, the first optical path turning element is a reflector. With such an arrangement, the load of the driving device can be reduced during the swinging of the front lens group around the rotation center point.

[0012] In some embodiments, the first optical path turning element is a prism and has a first light incident surface and a first light exit surface, the first light incident surface is arranged toward the side where the at least one positive lens is located, and the first light exit surface is arranged toward the side where the rear lens group is located; in the at least one positive lens, the positive lens adjacent to the prism is arranged apart from the first light incident surface. Such an arrangement is conducive to correcting the aberration of the optical lens.

[0013] In some embodiments, in the at least one positive lens, an air gap is provided between the positive lens adjacent to the prism and the first light incident surface.

[0014] In some embodiments, the rear lens group includes a first lens group and a second lens group, the first lens group is located between the front lens group and the second lens group, and along the second optical axis, the positions of the second lens group and the front lens group are relatively fixed, and the first lens group is a focusing lens group and can be moved relative to the front lens group along the second optical axis.

[0015] In some embodiments, the focus sensitivity parameter of the optical lens is sens=[1-(fg01 / fg0) 2 ](f / fg01) 2 , where f is the effective focal length of the optical lens, fg0 is the effective focal length of the front lens group, and fg01 is the combined focal length of the front lens group and the first lens group; the focus sensitivity parameter sens satisfies: sens ≥ 1.7. Such a setting can not only shorten the focus stroke of the optical lens, but also reduce the volume of the focus motor, which is conducive to miniaturization of the camera.

[0016] In some embodiments, sens satisfies: sens≥2.3. Such a setting is conducive to further shortening the focusing stroke of the optical lens.

[0017] In some embodiments, when the optical lens is in a state of focusing on a distant view, sens satisfies: 2.3≤sens≤3. Such a setting is not only conducive to shortening the time for the optical lens to focus on a distant view, but also ensures the focusing accuracy of the optical lens when focusing on a distant view.

[0018] In some embodiments, the front lens group and the first lens group both have positive focal power, and the second lens group has negative focal power. This arrangement can ensure that when the optical lens switches from focusing on a near view to focusing on a far view, the sens gradually decreases; when the optical lens switches from focusing on a far view to focusing on a near view, the sens gradually increases; and the aberration of the optical lens is reduced.

[0019] In some embodiments, the first lens group includes a first lens, a second lens, and a third lens along the direction from the object side to the image side, the first lens and the third lens both have positive optical power, the second lens has positive optical power or negative optical power, and there is a gap between two adjacent lenses of the first lens, the second lens, and the third lens; the second lens group includes a fourth lens and a fifth lens along the direction from the object side to the image side, the fourth lens and the fifth lens both have negative optical power, and there is a gap between the fourth lens and the fifth lens. Such an arrangement is conducive to correcting the aberration of the optical lens.

[0020] In some embodiments, the second lens includes a positive lens and a negative lens that are spaced apart from each other. Such a configuration is beneficial for correcting the aberration of the optical lens.

[0021] In some embodiments, in the second lens, there is an air gap between a positive lens and a negative lens.

[0022] In some embodiments, the fifth lens includes a positive lens and a negative lens that are spaced apart from each other. Such a configuration is beneficial for correcting the aberration of the optical lens.

[0023] In some embodiments, in the fifth lens, an air gap is provided between a positive lens and a negative lens.

[0024] In some embodiments, the optical lens further comprises a second optical path turning element, the second optical path turning element is arranged on the image side of the rear lens group, the second optical path turning element has a second reflective surface, and the angle between the second reflective surface and the optical axis of the lens is an acute angle. Such an arrangement can reduce the space occupied by the optical lens inside the electronic device; at the same time, it is helpful to control the size of the photosensitive surface (i.e., the image plane) of the photosensitive element in the direction parallel to the second optical axis.

[0025] In some embodiments, the second light path turning element is a reflector.

[0026] In some embodiments, the second optical path turning element is a prism and has a second light incident surface and a second light emitting surface, the second light incident surface is arranged toward the side where the rear lens group is located, and the second light emitting surface is located on one side of the second optical axis. Such an arrangement is conducive to improving the imaging quality of the optical lens.

[0027] In a second aspect, an embodiment of the present application provides a camera, comprising a photosensitive element and the optical lens described in the first aspect, wherein the photosensitive element is arranged on the image side of the optical lens.

[0028] The beneficial effects of the camera module in the embodiment of the present application are the same as the beneficial effects of the optical lens in the first aspect, and will not be repeated here.

[0029] In a third aspect, an embodiment of the present application provides an electronic device, comprising a housing and the camera described in the second aspect, wherein the camera is mounted on the housing.

[0030] The beneficial effects of the electronic device in the embodiment of the present application are the same as the beneficial effects of the camera module in the second aspect, and will not be repeated here.

[0031] In some embodiments, the electronic device is a mobile phone. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1a Schematic diagram of the definition of the image side principal plane and image side principal point of the optical system;

[0033] Figure 1b Schematic diagram of the definition of the object principal surface and object principal point of the optical system;

[0034] Figure 1c Schematic diagram of the definition of object distance and image distance of an optical system;

[0035] Figure 1d A schematic diagram of an optical system of a camera in the related art;

[0036] Figure 2 A schematic diagram of the back side of an electronic device (mobile phone) in some embodiments of the present application;

[0037] Figure 3 for Figure 2 AA cross-sectional view of the electronic device in;

[0038] Figure 4 A schematic diagram of the optical system of a camera in the first embodiment of the present application;

[0039] Figure 5a for Figure 4 Schematic diagram of the first anti-shake compensation movement of the front lens group in FIG.

[0040] Figure 5b Schematic diagram 1 for setting the position range of the first rotation center axis in the front lens group;

[0041] Figure 5c for Figure 4 Schematic diagram of the second anti-shake compensation movement of the front lens group in FIG.

[0042] Figure 5d Schematic diagram of the position setting range of the first rotation center axis in the front lens group Figure 2 ;

[0043] Figure 5e for Figure 4 Schematic diagram of the third anti-shake compensation movement of the front lens group in FIG.

[0044] Figure 5f Schematic diagram 1 for setting the position range of the second rotation center axis in the front lens group;

[0045] Figure 5g for Figure 4 Schematic diagram of the fourth anti-shake compensation movement of the front lens group in FIG.

[0046] Figure 5h Schematic diagram of the setting range of the position of the second rotation center axis in the front lens group Figure 2 ;

[0047] Figure 6 for Figure 4 A simplified diagram of the focusing principle of the optical system of the camera shown in FIG.

[0048] Figure 7 A schematic diagram of an optical system of a camera in a second embodiment of the present application;

[0049] Figure 8 A schematic diagram of an optical system of a camera in a third embodiment of the present application;

[0050] Fig. 9 A schematic diagram of an optical system of a camera in a fourth embodiment of the present application;

[0051] Fig.10a for Fig. 9 Schematic diagram of the first anti-shake compensation movement of the front lens group in FIG.

[0052] Fig.10b for Fig. 9 Schematic diagram of the second anti-shake compensation movement of the front lens group in FIG.

[0053] Fig.10c for Fig. 9 Schematic diagram of the third anti-shake compensation movement of the front lens group in FIG.

[0054] Fig.10d for Fig. 9 Schematic diagram of the fourth anti-shake compensation movement of the front lens group in FIG.

[0055] Fig.11 A schematic diagram of an optical system of a camera in a fifth embodiment of the present application;

[0056] Fig.12 A schematic diagram of an optical system of a camera in a sixth embodiment of the present application;

[0057] Fig.13 This is a light path diagram of the optical system of the camera in the seventh embodiment of the present application;

[0058] Fig.14 This is a simulation effect diagram of the optical system of the camera in the seventh embodiment of the present application when the object distance is infinite;

[0059] Fig.15 This is a simulation effect diagram of the optical system of the camera in the seventh embodiment of the present application when the object distance is 100 mm;

[0060] Fig.16 This is a light path diagram of the optical system of the camera in the eighth embodiment of the present application;

[0061] Fig.17This is a simulation effect diagram of the optical system of the camera in the eighth embodiment of the present application when the object distance is infinite;

[0062] Fig.18 This is a simulation effect diagram of the optical system of the camera in the eighth embodiment of the present application when the object distance is 100 mm;

[0063] Fig.19 This is a light path diagram of the optical system of the camera in the ninth embodiment of the present application;

[0064] Fig. 20 This is a simulation effect diagram of the optical system of the camera in the ninth embodiment of the present application when the object distance is infinite;

[0065] Fig.21 This is a simulation effect diagram of the optical system of the camera in the ninth embodiment of the present application when the object distance is 100 mm;

[0066] Fig. 22 This is a light path diagram of the optical system of the camera in the tenth embodiment of the present application;

[0067] Fig.23 This is a simulation effect diagram of the optical system of the camera in the tenth embodiment of the present application when the object distance is infinite;

[0068] Fig.24 This is a simulation effect diagram of the optical system of the camera in the tenth embodiment of the present application when the object distance is 100 mm;

[0069] Fig.25 This is a light path diagram of the optical system of the camera in the eleventh embodiment of the present application;

[0070] Fig.26 This is a simulation effect diagram of the optical system of the camera in the eleventh embodiment of the present application when the object distance is infinite;

[0071] Fig. 27 This is a simulation effect diagram of the optical system of the camera in the eleventh embodiment of the present application when the object distance is 50 mm. DETAILED DESCRIPTION

[0072] The following is an explanation and description of the relevant technical terms involved in the embodiments of the present application.

[0073] Focal power, expressed as the reciprocal of the image focal length (assuming that the refractive index of air is approximately 1), characterizes the ability of an optical lens to deflect light. A lens or lens group with positive focal power has a positive focal length and has the effect of converging light. A lens or lens group with negative focal power has a negative focal length and has the effect of diverging light.

[0074] A positive lens, also known as a converging lens or convex lens, is a lens that is thicker in the middle and thinner at the edges. Convex lenses have the function of converging light. Convex lenses are divided into biconvex, plano-convex, and concave-convex (or positive meniscus) forms.

[0075] Negative lens, also called diverging lens or concave lens, is a lens that is thin in the middle and thick at the edges. Concave lens has a diverging effect on light. Concave lenses are divided into double concave, plano-concave, convex-concave and other forms.

[0076] 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 the optical elements of the optical lens. The optical axis also refers to the center line of a light beam (light column). When the light beam rotates around this axis, the optical properties do not change.

[0077] The object side surface, with the lens as the boundary, the side where the photographed object is located is called the object side, and the surface of the lens close to the object side is called the object side surface.

[0078] The image side surface, with the lens as the boundary, the side where the image of the object is located is called the image side, and the surface of the lens close to the image side is called the image side surface.

[0079] Focal length is a measurement method for measuring the convergence or divergence of light in an optical system. It refers to the distance from the optical center of the lens to the focus of light convergence when parallel light is incident. The focal length is divided into image-side focal length and object-side focal length. The image-side focal length is the distance from the image-side principal surface to the image-side focus. Similarly, the object-side focal length is the distance from the object-side principal surface to the object-side focus. The focal length, effective focal length (EFL), and combined focal length described in the embodiments of the present application all refer to the image-side focal length.

[0080] The principal plane of a lens (lens group), also called the principal plane, includes the image side principal plane and the object side principal plane. When parallel light is irradiated onto a lens (lens group), it will be refracted and pass through the focus of the image side. After refraction, the light will be extended in the opposite direction and intersect with the incident light at one point. The plane perpendicular to the optical axis made through this point is the image side principal plane, and the intersection of the image side principal plane and the optical axis of the optical lens is the image side principal point. Similarly, light emitted from the object side focus will be refracted by the lens and become parallel light. The incident light will be extended and intersect with the parallel light at one point. The plane perpendicular to the optical axis made through this point is the object side principal plane, and the intersection of the object side principal plane and the optical axis of the optical lens is the object side principal point.

[0081] like Figure 1aAs shown, AB is an incident light ray parallel to the optical axis. After passing through the optical system, the outgoing light ray E'F' intersects the optical axis at F'. According to the imaging theory of the ideal optical system, F' is the image point of the object point on the infinite axis, which is called the image side focus. If the incident light ray AB and the outgoing light ray E'F' are extended in the opposite direction, the two rays must intersect at one point. Let this point be Q'. A plane perpendicular to the optical axis is made through Q' and intersects the optical axis at point H'. Then H' is called the image side principal point, the Q'H' plane is called the image side principal plane, and the distance from the principal point H' to the focus F' is called the image side focal length.

[0082] like Figure 1b As shown, F is called the object focus. Suppose the extension line of the incident light emitted from the focus F intersects with the extension line of the corresponding outgoing light 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 principal point of the optical system, and the QH plane is called the object principal plane. The distance from the object principal point H to the object focus F is called the object focal length of the optical system.

[0083] Object distance, such as Figure 1c As shown, it refers to the distance from the object plane to the object principal plane of the optical system, represented by the English letter U; wherein the optical system can be a single lens or a lens group formed by multiple lenses.

[0084] Image distance, such as Figure 1c As shown, it refers to the distance from the image plane to the main surface of the image side of the optical system, which is represented by the English letter V; wherein the optical system can be a single lens or a lens group formed by multiple lenses.

[0085] Focusing specifically refers to adjusting the position of the lens group (i.e., 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 to make the image of the optical lens clearest.

[0086] Internal focusing (IF) means that when the optical lens is focusing, a focusing lens group inside the optical lens moves to complete the focusing, and the total length (TTL) of the optical lens remains unchanged during focusing.

[0087] The focus stroke refers to the distance that the focus lens group moves 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 close view, the distance that the focus lens group moves along the optical axis is the focus stroke.

[0088] The image plane is located on the image side of all lenses in the optical lens, and is the plane on which the image is formed after light passes through each lens in the optical lens in sequence.

[0089] MTF (Modulation Transfer Function) is the ratio of the contrast on the image plane to the contrast on the object plane, that is, MTF is the transfer of contrast. MTF = M / m; M = (Imax-Imin) / (Imax+Imin); where Imax is the maximum light intensity on the object plane and Imin is the minimum light intensity on the object plane; m = (imax-imin) / (imax+imin), where imax is the maximum light intensity on the image plane and imin is the minimum light intensity on the image plane; MTF is a quantitative description of the clarity of the optical lens, or more precisely, a quantitative description of the clarity of the optical lens imaging (including two factors: resolution and sharpness), and the MTF value satisfies 0≤MTF≤1.

[0090] An aperture is an entity that limits the light beam in an optical system. The aperture can be the edge of a lens, a frame, or a specially set screen with holes. The function of an aperture can be divided into two aspects: limiting the light beam or limiting the size of the field of view (imaging range). The aperture that limits the light beam the most in an optical system is called an aperture aperture, and the aperture that limits the field of view (size) the most is called a field aperture.

[0091] The pupil is the image of the aperture diaphragm. The image formed by the aperture diaphragm through the optical system in front of the aperture diaphragm is called the entrance pupil, or entrance pupil for short. The entrance pupil diameter is the diameter of the entrance pupil.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] ImgH (Image Hight) represents half of the diagonal length of the effective photosensitive area on the photosensitive element, that is, the image height.

[0096] The Abbe number, or dispersion coefficient, is the difference ratio of the refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0097] 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.

[0098] Spherical aberration is a wide beam aberration. After passing through the optical system, the concentric beams emitted from the on-axis point are no longer concentric beams. Light rays of 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, or spherical aberration for short. Due to the existence of spherical aberration, the image point on the Gaussian image plane is no longer a point, but a circular diffuse spot. The radius of the diffuse spot is called the vertical axis spherical aberration.

[0099] Coma is an aberration of wide beams of off-axis points. In an optical system with coma, the image point formed by the off-axis object point on the ideal image plane is like a comet-shaped spot, and the thin beams close to the main ray intersect with the main ray to form a bright spot, while the image points formed by beams of light with different apertures far away from the main ray are different circular rings far away from the main ray, so this imaging defect is called coma.

[0100] Chromatic Aberration (CA for short), optical materials have different refractive indices for different wavelengths of light, so light of different colors of the same aperture have different intersections with the optical axis after passing through the optical system. The intersections of light of different colors of different apertures with the optical axis are also different. As a result, at any position on the image plane, the image of the object point is a colorful diffuse spot. The difference in imaging position and imaging size between various colors of light is called chromatic aberration. There are two types of chromatic aberration: axial chromatic aberration and vertical chromatic aberration.

[0101] Axial chromatic aberration: The difference in the imaging position of two colors of light at a point on the axis is called positional chromatic aberration, also known as axial chromatic aberration.

[0102] Vertical chromatic aberration: The same medium has different refractive indices for different colors of light. Therefore, for off-axis object points, the vertical magnifications of different colors of light are also not equal. This difference is called vertical chromatic aberration, also called magnification chromatic aberration.

[0103] Distortion, also known as distortion, is the difference between the intersection of the main light of different fields of view and the Gaussian image plane after passing through the optical lens and the ideal image height.

[0104] Field curvature is used to indicate the difference between the clearest image point position of the non-central field of view after the light passes through the optical lens group and the clearest image point position of the central field of view on the optical axis. When field curvature exists, the image points beyond the paraxial area on the Gaussian plane will become blurred, the image of the plane object will become a rotating curved surface, and a perfect image of the object plane will not be obtained at the image plane.

[0105] Astigmatism: the meridional image point and sagittal image point of a thin beam of light do not coincide, and the axial distance separating the two is called astigmatism.

[0106] Meridian plane refers to the plane formed by the principal ray emitted by the object point outside the principal axis of the optical system and the principal axis of the optical system. The rays located in the meridian plane are collectively called meridian beams. The points formed by the meridian beams are called meridian image points. The image plane where the meridian image points are located is called the meridian image plane.

[0107] The sagittal plane refers to the plane that passes through the principal ray emitted by the object point outside the principal axis of the optical system and is perpendicular to the meridian plane. The rays in the sagittal plane are collectively called sagittal beams. The point formed by the sagittal beam is called the sagittal image point. The image plane where the sagittal image point is located is called the sagittal image plane.

[0108] The technical solutions in some embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0109] like Figure 1d As shown, Figure 1d A schematic diagram of an optical system of a camera in the related art, the camera includes an optical lens 01 and a photosensitive element 02, the optical lens 01 is a telephoto lens, and includes a front lens group G0, a first lens group G1 and a second lens group G2 along the direction from the object side to the image side, the front lens group G0 includes an optical path turning element 011 and a positive lens 012 located on the object side of the optical path turning element 011, and the optical path turning element 011 is a prism. The light beam emitted by the photographed scene passes through the front lens group G0, the first lens group G1 and the second lens group G2, and then forms an image on the photosensitive surface of the photosensitive element 02.

[0110] However, the photographer's hands will inevitably shake during handheld photography, which causes the projection point of the light entering the camera on the photosensitive element 02 to deviate from the normal position, and the image on the camera's image plane drifts, making the camera's image blurry, thereby reducing the camera's image quality.

[0111] To this end, the present application provides an optical lens, a camera and an electronic device. By setting the front lens group of the optical lens to be able to swing around a rotation center axis (i.e., nodding motion), it is possible to compensate for the drift of the image on the image plane caused by the jitter of the electronic device, so as to ensure that the camera can still maintain stable imaging in a jittering environment.

[0112] The electronic device in the embodiment of the present application may be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch), or other electronic device with a camera. The electronic device in the embodiment of the present application is specifically introduced using a mobile phone as an example. Other types of electronic devices may be specifically configured with reference to the structure of the mobile phone embodiment, and will not be described in detail here.

[0113] like Figure 2 to Figure 4 As shown, Figure 2 Schematic diagram of the back side of an electronic device (mobile phone) in some embodiments of the present application. Figure 3 for Figure 2 AA cross-sectional view of an electronic device in Figure 4 Schematic diagram of the optical system of the camera 100 in the first embodiment of the present application. The electronic device comprises a housing 200, a display screen 300 and the camera 100, wherein the camera 100 is mounted on the housing 200.

[0114] In some embodiments, Figure 3 As shown, the housing 200 includes a middle frame 210 (also called a front shell or a front frame) and a back cover 220 (also called a battery cover). The display screen 300 and the back cover 220 are respectively mounted on opposite sides of the middle frame 210. The back cover 220 and the middle frame 210 enclose a first accommodation space 230. The camera 100 is a rear camera and is disposed in the first accommodation space 230. The light inlet of the camera 100 is disposed opposite to the camera window 221 disposed on the back cover 220 to ensure that the camera 100 can receive light emitted by the object being photographed outside the housing 200.

[0115] Among them, the camera window 221 can be directly set on the back cover 220; Figure 3 As shown, the camera window 221 can also be arranged on the camera decoration 222. Specifically, the camera decoration 222 is arranged on the back cover 220. One side of the camera decoration 222 has an opening, and a protective cover 223 is arranged at the opening. The light-transmitting area of ​​the protective cover 223 is the camera window 221. Figure 3 As shown, the camera decoration 222 can be an integral structure with the back cover 220 , but it is not limited thereto. The camera decoration 222 can also be designed as a separate body from the back cover 220 .

[0116] The display screen 300 and the middle frame 210 form a second accommodating space 240, and the second accommodating space 240 is used to set electronic devices such as the main board 400. The main board 400 is connected to the display screen 300 and the camera 100 through flexible circuit boards. The main board 400 is provided with a processor (not shown in the figure), and the processor is used to obtain image data from the camera 100, process the image data, and then transmit the processed signal to the display screen 300.

[0117] The middle frame 210 and the back cover 220 may be detachably connected or may be an integrated structure, which is not specifically limited here. The display screen 300 may be a liquid crystal display screen or an OLED (Organic Light-Emitting Diode) display screen, which is not specifically limited here.

[0118] The camera 100 in the embodiment of the present application can be installed in the upper left corner, the middle of the upper part or the upper right corner of the back of the electronic device, which is not specifically limited here. In addition to being installed on the back of the electronic device and used as a rear camera, the camera 100 can also be used as a front camera of the electronic device.

[0119] In some embodiments, Figure 3 and Figure 4 As shown, the camera 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 illuminate the photosensitive surface of the photosensitive element 20.

[0120] 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, forming 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. The processor transmits the electrical signal to the display screen 300 to display the image of the photographed scene on the display screen 300.

[0121] The photosensitive element 20 (also called an image sensor) is a semiconductor chip with hundreds of thousands to millions of photodiodes on its surface. When exposed to light, it generates electric charge. The photosensitive element 20 can be a charge coupled device (CCD) or a complementary metal-oxide semiconductor device (CMOS), which is not specifically limited here.

[0122] The filter 30 is used to filter out unnecessary wavelengths in the light to prevent the photosensitive element 20 from generating false colors or ripples, thereby improving its effective resolution and color reproduction. Figure 3 As shown, the filter 30 is an infrared filter 30 .

[0123] Among them, Figure 3 As shown, the filter 30 can be independently provided, 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, which is not specifically limited here.

[0124] In some embodiments, Figure 3 As shown, the camera 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 .

[0125] like Figure 4As shown, the optical lens 10 includes a front lens group G0 and a rear lens group G10 arranged in a direction from the object side to the image side; the front lens group includes a first optical path turning element 14, and a positive lens L01 located on the object side of the first optical path turning element 14, the first optical path 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 L01 to the rear lens group G10. The positive lens L01 has a first optical axis 11, and the rear lens group G10 has a second optical axis 12, and the second optical axis 12 includes an optical axis segment 121, the end point O1 of the optical axis segment 121 is located on the first reflecting surface 141, and the optical axis segment 121 extends toward the image side of the first reflecting surface 141 (for example, Figure 4 The optical axis segment 121 is shown extending to the right side of the first reflecting surface 141).

[0126] like Figure 4 and Figure 5a As shown, Figure 5a for Figure 4 Schematic diagram of the first anti-shake compensation movement of the front lens group G0 in FIG. The front lens group G0 is an anti-shake compensation lens group, and can swing around the first rotation center axis m (i.e., nodding movement). The first rotation center axis m is perpendicular to the first optical axis 11 and the second optical axis 12, and the first rotation center axis m intersects with the optical axis segment 121, that is: the projection point of the first rotation center axis m on the first plane 2 is located on the optical axis segment 121, and the first plane 2 is a plane determined by the first optical axis 11 and the second optical axis 12. Among them, the above-mentioned "perpendicular" refers to both absolute verticality and approximate verticality, such as a deviation within 1°.

[0127] Of course, in addition to intersecting the optical axis segment 121, the first rotation center axis m may also be located near the optical axis segment 121. Specifically, Figure 5b As shown, the projection point of the first rotation center axis m on the first plane 2 is within the area 181 defined by the straight line k1, the straight line k2 and the semicircular arc p1p2 (including the boundary).

[0128] Wherein, the straight line k1 and the straight line k2 are both parallel to the second optical axis 12, the straight line k1 is arranged close to the positive lens L01, and the straight line k2 is arranged far away from the positive lens L01, the straight line k1 intersects with the first reflecting surface 141 at the point p1, the distances from the straight line k1 and the straight line k2 to the second optical axis 12 are both 3 mm, the radius of the semicircular arc p1p2 is 3 mm, and one end of the region 181 ( Figure 5b The left end of the region 181 is bounded by the semicircular arc p1p2, and the other end of the region 181 ( Figure 5b The right end in FIG. 1 may extend to the surface of the element farthest from the front lens group G0 in the optical lens 10, such as Figure 4 The second reflective surface 151 of the second optical path turning element 15 (will be described in detail later).

[0129] By setting the front lens group G0 as an anti-shake compensation lens group and allowing it to swing around the first rotation center axis m, when the electronic device takes a photo through the camera and the electronic device shakes slightly in a direction parallel to the first plane 2, the front lens group G0 is swung around the first rotation center axis m. This can compensate for the image drift on the image plane caused by the shaking of the electronic device, so that the camera can still ensure image quality in a shaking environment, thereby realizing the OIS (Optical Image Stabilization) function of the camera.

[0130] At the same time, compared with the solution in which the front lens group G0 only includes the first light path turning element 14 and the first light path turning element 14 swings, the front lens group G0 in the embodiment of the present application is the first light path turning element 14 and at least one positive lens on the object side that swings around the first rotation center axis m. In this way, in the process of the front lens group G0 rotating around the first rotation center axis m for anti-shake compensation, the MTF loss of the optical lens 10 can be reduced, thereby improving the imaging clarity of the optical lens 10.

[0131] In some embodiments, Figure 5a As shown, the first rotation center axis m passes through the end point O1 of the optical axis segment 121 located on the first reflective surface 141 .

[0132] In some embodiments, Figure 5c As shown, Figure 5c for Figure 4 Schematic diagram of the second anti-shake compensation movement of the front lens group G0 in FIG. The first rotation center axis m is located on the image side of the first reflection surface 141, and the first rotation center axis m passes through the intersection point O2, the intersection point O2 is the intersection point of the first straight line k3 and the optical axis segment 121, the first straight line k3 is parallel to the first optical axis 11, and intersects with the bottom edge 1411 of the first reflection surface 141. In this way, when the front lens group G0 rotates around the first rotation center axis m to perform anti-shake compensation, the loss of MTF of the optical lens 10 can be reduced, thereby further improving the imaging clarity of the optical lens 10.

[0133] The bottom edge 1411 of the first reflecting surface 141 is the edge line of one side of the first reflecting surface 141 away from the positive lens L01, or the bottom edge 1411 of the first reflecting surface 141 is the edge line of one side of the first reflecting surface 141 close to the rear lens group G10. The first straight line k3 intersects with the bottom edge 1411 of the first reflecting surface 141 at point O5, and intersects with the object side surface of the positive lens L01 at point O4. The first optical axis 11 intersects with the object side surface of the positive lens L01 at point O3. Points O1, O2, O3, O4, and O5 are all located in the first plane 2.

[0134] Of course, the first rotation center axis m may also be located near the intersection point O2, that is, the projection point of the first rotation center axis m on the first plane 2 is located near the intersection point O2. This arrangement can also reduce the loss of the MTF of the optical lens 10.

[0135] The first rotation center axis m is located near the intersection point O2, which specifically means: Figure 5d As shown, the projection point of the first rotation center axis m on the first plane 2 is located within the area 182 (including the boundary) defined by the straight line dg, the straight line ef, the straight line fg and the semicircular arc de, the straight line dg and the straight line ef are both parallel to the second optical axis 12, the straight line fg is perpendicular to the optical axis segment 121, the distances between the straight line dg and the straight line ef and the optical axis segment 121 are both 3 mm, and the radius of the semicircular arc de is 3 mm.

[0136] The length of the straight line dg may be within 20 mm.

[0137] Furthermore, the length of the straight line dg may also be within 10 mm.

[0138] In some embodiments, Figure 5e As shown, Figure 5e for Figure 4 Schematic diagram of the third anti-shake compensation movement of the front lens group G0 in FIG. The front lens group G0 can swing around the second rotation center axis n (i.e., head shaking movement), and the second rotation center axis n coincides with the second optical axis 12. In this way, the swing of the front lens group G0 around the second rotation center axis n can compensate for the drift of the image plane caused by the shaking of the electronic device in the direction perpendicular to the second optical axis 12, so that the camera can still ensure the image quality in a shaking environment.

[0139] Of course, the second rotation center axis n may also be parallel to the second optical axis 12, and the second rotation center axis n is located close to the second optical axis 12. Specifically, Figure 5f As shown, the second rotation center axis n is located in the first space 183 (including the boundary), and the first space 183 is a cylindrical space with the second optical axis 12 as the center axis and a radius r of 3 mm.

[0140] In some embodiments, Figure 5g As shown, Figure 5f for Figure 4 Schematic diagram of the fourth anti-shake compensation movement of the front lens group G0 in FIG. The front lens group G0 can swing around the second rotation center axis n (i.e., head shaking movement), and the second rotation center axis n coincides with the first optical axis 11. In this way, the swing of the front lens group G0 around the second rotation center axis n can compensate for the drift of the image plane caused by the shaking of the electronic device in the direction perpendicular to the first optical axis 11, so that the camera can still ensure the image quality in a shaking environment.

[0141] Of course, the second rotation center axis n may also be parallel to the first optical axis 11, and the second rotation center axis n is located close to the first optical axis 11. Specifically, Figure 5h As shown, the second rotation center axis n is located in the second space 184 (including the boundary), and the second space 184 is a cylindrical space with the first optical axis 11 as the center axis and a radius r of 3 mm.

[0142] In the embodiment of the present application, the front lens group G0 can swing around the first rotation center axis m and the second rotation center axis n. With such an arrangement, the front lens group G0 can compensate for the drift of the image plane caused by the shaking of the electronic device in multiple directions, so that the imaging of the camera can be more stable. In addition, the front lens group G0 can also swing around one of the first rotation center axis m and the second rotation center axis n.

[0143] In some embodiments, Figure 3 As shown, the positive lens L01 on the object side of the first optical path turning element 14 is located in the third accommodating space 224 surrounded by the camera decoration 222, and there is a gap between the positive lens L01 and the camera decoration 222 to prevent interference between the positive lens L01 and the camera decoration 222 when the front lens group G0 swings around the first rotation center axis m and the second rotation center axis n.

[0144] Of course, in addition to providing one positive lens, a plurality of positive lenses may be provided on the object side of the first optical path turning element 14 , and the plurality of positive lenses are all located in the third accommodating space 224 .

[0145] In some embodiments, Figure 4 As shown, the rear lens group G10 includes a first lens group G1 and a second lens group G2, the first lens group G1 is located between the front lens group G0 and the second lens group G2, the first lens group G1 is a focusing lens group and can move relative to the front lens group G0 along the second optical axis 12. Wherein, along the second optical axis 12, the positions of the second lens group G2 and the front lens group G0 are relatively fixed, specifically, during the focusing process of the optical lens 10, the distance between the second lens group G2 and the front lens group G0 on the second optical axis 12 remains unchanged.

[0146] The focus sensitivity parameter sens of the optical lens 10 satisfies: sens≥1.7.

[0147] Focus sensitivity parameter sens = [1-(fg01 / fg0) 2 ](f / fg01) 2 Formula (1);

[0148] Wherein, f is the effective focal length of the optical lens 10, fg0 is the effective focal length of the front lens group G0, and fg01 is the combined focal length of the front lens group G0 and the first lens group G1.

[0149] By setting sens to sens≥1.7, the focusing stroke of the optical lens 10 can be shortened, and the volume of the focusing motor can be reduced, which is beneficial to miniaturization of the camera.

[0150] In order to facilitate the understanding of the correlation between the focus sensitivity parameter sens and the focus stroke, the definition of sens and the derivation process of formula (1) are explained below:

[0151] like Figure 6 As shown, Figure 6 for Figure 4 The focusing principle diagram of the optical system of the camera shown in the figure is as follows: Figure 6 The light path in the figure is illustrated by taking the paths of two light rays emitted by an object point on an axis of the scene as an example.

[0152] Assume that the initial object distance of the scene photographed by the optical lens 10 is U, and the initial image distance is V. Figure 6 As shown in (b), when the positions of the front lens group G0, the first lens group G1, and the second lens group G2 remain unchanged, when the object distance change is △U, that is, the absolute value of the difference between the target object distance and the initial object distance, the corresponding image distance change is △V. Figure 6 As shown in (c), during the focusing process of the optical lens 10, the positions of the front lens group G0 and the second lens group G2 remain unchanged, the object distance changes by △U, and the moving distance of the first lens group G1 (i.e., the focusing stroke) is △X, so that the position of the image plane I remains unchanged.

[0153] Define sens as: sens = △V / △X (Formula 2);

[0154] Based on Newton's formula, it can be known that the relationship between the object distance, image distance and effective focal length of the optical lens 10 satisfies:

[0155] 1 / U+1 / V=1 / f (Formula 3);

[0156] like Figure 6 As shown in (a) and (b), when the object moves to the right by △U, the positions of the front lens group G0, the first lens group G1, and the second lens group G2 remain unchanged, and the image plane I (i.e., the focal plane) of the optical lens 10 moves to the right by △V;

[0157] 1 / (U-△U)+1 / (V+△V)=1 / f;

[0158] △V / △U=(V / U) 2 ≈(f / U) 2 ; Among them, (V / U) 2 ≈(f / U) 2The condition is that the absolute value of the object distance of the photographed scene is much larger than the absolute value of the focal length, that is, |U|>>|f|.

[0159] It can be obtained that the image plane I of the optical lens 10 moves rightward by △V=△U(f / U) 2 (Formula 4);

[0160] like Figure 6 As shown in (b), when the subject moves to the right by △U, the object distance from the subject to the principal surface of the front lens group G0 is U0, the positions of the front lens group G0, the first lens group G1, and the second lens group G2 remain unchanged, and the image m2 formed by the system composed of the front lens group G0 and the first lens group G1 moves to the right by a distance of:

[0161] △U(fg01 / U01) 2 =△U(fg0 / U0) 2 (fg1 / U1) 2 (Formula 5);

[0162] Among them, U1 represents the distance from the image m1 of the photographed scene after passing through the front lens group G0 to the principal surface of the first lens group G1; U01 represents the distance from the object surface of the photographed scene to the principal surface of the combined system of the front lens group G0 and the first lens group G1. Figure 6 As shown in (c), when the object moves to the right by △U, the positions of the front lens group G0, the second lens group G2 and the image plane I of the optical system remain unchanged, and the first lens group G1 moves to the left by △X;

[0163] The image m1 formed by the front lens group G0 moves to the right by △U(fg0 / U0) 2 ;

[0164] The image m2 formed by the image m1 through the first lens group G1 remains in a fixed position, that is:

[0165] [△U(fg0 / U0) 2 +△X]·(fg1 / U1) 2 - △X = 0 (Formula 6);

[0166] Under the premise that the object distance (absolute value) of the photographed scene is much greater than the focal length (absolute value), it is considered that U0≈U01≈U; from equations 2 to 6, we can get: Sens=△V / △X=[1-(fg01 / fg0) 2 ](f / fg01) 2 ;

[0167] It can be seen from the formula of sens that the size of sens is related to fg01, fg0, and f.

[0168] It can be seen from Formula 2 that the focus sensitivity parameter Sens is the change in image distance caused by the focus lens group moving a unit distance. The larger the focus sensitivity parameter Sens is, the larger the change in image distance caused by the focus lens group moving a unit distance is. During the focusing process of the optical lens 10, when the image distance change is constant, the larger the sens is, the smaller the focus stroke △X is; the smaller the sens is, the larger the focus stroke △X is. The physical meaning of the focus sensitivity parameter Sens value is to use a physical parameter to characterize the scheme of the first lens group G1 as the focus lens group (for example Figure 4 The value of the first lens group G1 as a focus lens group is that it has a shorter focus stroke than the solution of moving the front lens group G0, the first lens group G1, and the second lens group G2 as a group to focus. Usually, the sens value of the first lens group G1 as a focus lens group is greater than or equal to 1.

[0169] In some embodiments, sens satisfies: sens≥2.3. Such a setting is conducive to further shortening the focusing stroke of the optical lens.

[0170] In some embodiments, when the optical lens 10 is in a state of focusing on a distant view, sens satisfies: 2.3≤sens≤3. Such a setting is not only conducive to shortening the focusing stroke of the optical lens 10 when focusing on a distant view, but also ensures the focusing accuracy of the optical lens 10 when focusing on a distant view, thereby facilitating improving the imaging quality and focusing efficiency of the camera when shooting distant views.

[0171] Among them, there is a certain correlation between focusing accuracy and sens. If sens is set too large, the change in image distance caused by the movement of the focusing lens group per unit distance will be too large, which will reduce the focusing accuracy and make it difficult for the image plane I of the optical lens 10 to adjust to the position of the photosensitive surface of the photosensitive element 20.

[0172] In some embodiments, Figure 4 As shown, the front lens group G0 and the first lens group G1 both have positive refractive power, and the second lens group G2 has negative refractive power.

[0173] With such an arrangement, when the optical lens 10 switches from focusing on a near view to focusing on a distant view, the sens decreases, that is, the closer the focus of the optical lens 10 is to the distant view, the greater the change in image distance caused by the unit distance moved by the first lens group G1. This is beneficial to improving the focusing accuracy of the optical lens 10 when focusing on the distant view.

[0174] In the process of switching the optical lens 10 from focusing on the distant view to focusing on the near view, the sens increases, that is, the closer the focus of the optical lens 10 is to the near view, the greater the change in image distance caused by the unit distance moved by the first lens group G1. This helps to shorten the time for the optical lens 10 to focus on the near view, thereby improving the focusing efficiency of the camera for shooting near views.

[0175] In addition, the focal length of the front lens group G0 is set to be positive, so that the front lens group G0 focuses the light beam and reduces the diameter of the light beam, which is beneficial to reducing the diameter of the first lens group G1 and the second lens group G2. The focal lengths of the first lens group G1 and the second lens group G2 are set to be positive or negative, so that some aberrations can be offset, which is beneficial to reducing the aberrations of the optical lens 10 and ensuring the imaging quality of the optical lens 10.

[0176] In some embodiments, Figure 4 As shown, the first light path turning element 14 is a reflector. Compared with a prism, the first light path turning element 14 is set as a reflector, which is lighter in weight, and the load of the driving device can be reduced during the swinging of the front lens group G0 around the rotation center point P.

[0177] The reflector includes a mirror body and a reflective film covering a surface of one side of the mirror body. The mirror body may be made of glass, but is not limited thereto and may be made of other materials. The reflective film may be a metal film, such as a silver film, an aluminum film, a gold film, etc.; the reflective film may also use a dielectric high reflective film layer to achieve ultra-high reflectivity.

[0178] In some embodiments, Figure 4 As shown, the angle between the first reflecting surface 141 and the second optical axis 12, and the angle between the first reflecting surface 141 and the first optical axis 11 are both 45°. However, this is not limited thereto, and the angle between the first reflecting surface 141 and the second optical axis 12, and the angle between the first reflecting surface 141 and the first optical axis 11 can also be set to other angles according to actual needs.

[0179] In some embodiments, Figure 4 As shown, the first lens group G1 includes a first lens L11, a second lens L14 and a third lens L15 along the direction from the object side to the image side, the first lens L11, the second lens L14 and the third lens L15 all have positive refractive power, and there is a gap between two adjacent lenses of the first lens L11, the second lens L14 and the third lens L15. Such an arrangement not only increases the number of surfaces of the lenses in the first lens group G1, increases the degree of freedom in the design of the first lens group G1, and is beneficial to correcting the aberration of the optical lens 10, but also avoids an excessive number of lenses in the first lens group G1, thereby helping to reduce the weight of the optical lens 10.

[0180] Of course, the second lens L14 may also have a negative optical power. In this way, the optical power of the lenses in the first lens group G1 is combined in a positive, negative, and positive manner, which is more conducive to correcting the aberration of the optical lens 10. In some embodiments, Figure 4 As shown, the second lens group G2 includes a fourth lens L21 and a fifth lens L24 along the direction from the object side to the image side, the fourth lens L21 and the fifth lens L24 both have negative optical power, and there is a gap between the fourth lens L21 and the fifth lens L24. Such an arrangement not only increases the number of surfaces of the lenses in the second lens group G2, increases the degree of freedom in the design of the second lens group G2, and is beneficial to correcting the aberration of the optical lens 10, but also avoids an excessive number of lenses in the second lens group G2, thereby balancing the optical power of the optical lens 10 and reducing the weight of the optical lens 10.

[0181] The first lens group G1 is not limited to the above structure, and the first lens group G1 may include more than 4 lenses; the second lens group G2 is not limited to the above structure, and the second lens group G2 may include more than 3 lenses.

[0182] In some embodiments, Figure 4 As shown, the optical lens 10 also includes a first fixed barrel 41, the first lens group G1 is arranged in the first fixed barrel 41, and a spacer ring 51 is provided between two adjacent ones of the first lens L11, the second lens L14 and the third lens L15. A limiting flange 411 is provided at one end of the first fixed barrel 41, and a pressing ring 52 is provided at the other end. The limiting flange 411 and the pressing ring 52 limit the first lens group G1 in the first fixed barrel 41.

[0183] In some embodiments, Figure 4 As shown, a light shielding ring 53 is provided at the edge of at least one of the first lens L11, the second lens L14 and the third lens L15 to eliminate stray light at the edge of the first lens group G1. The light shielding ring 53 can be provided at the edge of the second lens L14.

[0184] In some embodiments, Figure 4 As shown, the optical lens 10 further includes a second fixed barrel 42, the second lens group G2 is disposed in the second fixed barrel 42, and a spacer ring 51 is disposed between the fourth lens L21 and the fifth lens L24.

[0185] In some embodiments, Figure 4 As shown, a light shielding ring 53 is provided at the edge of at least one of the fourth lens L21 and the fifth lens L24 to eliminate stray light at the edge of the second lens group G2. For example, the light shielding ring 53 can be provided at the edge of the fourth lens L21 and the fifth lens L24, respectively.

[0186] In some embodiments, Figure 4 As shown, the optical lens 10 further includes a second optical path turning element 15, which is disposed on the image side of the focusing lens group (specifically, on the image side of the second lens group G2), and has a second reflecting surface 151, which is used to reflect the light beam passing through the rear lens group G10 toward one side of the second optical axis 12. At this time, the optical lens 10 has three optical axes, namely the first optical axis 11, the second optical axis 12, and the second optical axis 13, the second optical axis 13 and the second optical axis 12 intersect on the second reflecting surface 151, and the photosensitive element 20 and the second optical path turning element 15 are arranged along the second optical axis 13.

[0187] By setting the second optical path turning element 15, the optical path of the optical lens 10 can be folded to reduce the size of the optical lens 10 along the second optical axis 12, thereby reducing the space occupied by the optical lens 10 inside the electronic device; at the same time, it is helpful to control the size of the photosensitive surface (i.e., the image plane) 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, thereby reducing the space occupied by the photosensitive element 20 in the thickness direction of the electronic device.

[0188] In some embodiments, Figure 4 As shown, the second optical path turning element 15 is a prism and has a second light incident surface 152 and a second light emitting surface 153. The second light incident surface 152 is arranged toward the side where the rear lens group G10 is located, and the second light emitting surface 153 is located on one side of the second optical axis 12 (for example, Figure 4 The second light emitting surface 153 is located at the lower side of the second optical axis 12). By setting the second light path turning element 15 as a prism, the second reflecting surface 151 is located inside the prism, which is less affected by external interference (such as dust) and has less light energy loss, thereby facilitating improving the imaging quality of the optical lens 10.

[0189] The material of the prism can be glass, resin or other light-transmitting materials, which is not specifically limited here.

[0190] In some embodiments, Figure 4 As shown, the second light path turning element 15 is a right-angle prism, the second light incident surface 152 and the second light exit surface 153 are right-angle surfaces of the right-angle prism respectively, and the second reflection surface 151 is the inclined surface of the right-angle prism. In addition to the right-angle prism, the second light path turning element 15 can also be set as a prism of other shapes.

[0191] In some embodiments, Figure 4As shown, the angle between the second reflective surface 151 and the second optical axis 12 is 45°, and the second optical axis 12 is perpendicular to the second optical axis 13. However, it is not limited thereto, and the angle between the second reflective surface 151 and the second optical axis 12 can also be set to other angles according to actual needs.

[0192] like Figure 7 As shown, Figure 7 Schematic diagram of the optical system of the camera in the second embodiment of the present application. Figure 7 The optical lens 10 shown is Figure 4 The main differences of the optical lens 10 shown are: Figure 7 Two positive lenses are provided on the object side of the first optical path turning element 14, as described in detail as follows:

[0193] Two positive lenses, namely positive lens L01 and positive lens L02, are arranged on the object side of the first optical path turning element 14. By arranging two positive lenses on the object side of the first optical path turning element 14, the degree of freedom of design of the front lens group G0 is increased, which is conducive to correcting the aberration of the optical lens 10.

[0194] Of course, the number of positive lenses arranged on the object side of the first optical path turning element 14 is not limited to two, and can also be more than two, such as three, four, five, etc., and can be set according to actual needs.

[0195] As for Figure 7 For details on the settings of other components shown in Figure 4 The settings will not be described in detail here.

[0196] like Figure 8 As shown, Figure 8 It is a schematic diagram of the optical system of the camera in the third embodiment of the present application. Figure 8 The optical lens 10 shown is Figure 4 The main differences of the optical lens 10 shown are: Figure 8 The optical lens 10 is not provided with the second optical path turning element 15 , so the optical lens 10 has two optical axes, namely the second optical axis 12 and the first optical axis 11 , and the photosensitive element 20 and the optical lens 10 are arranged along the second optical axis 12 .

[0197] As for Figure 8 For details on the settings of other components shown in Figure 4 The settings will not be described in detail here.

[0198] like Fig. 9 As shown, Fig. 9 This is a schematic diagram of the optical system of the camera in the fourth embodiment of the present application. Fig. 9 The optical lens 10 shown is Figure 4 The main differences of the optical lens 10 shown are: Figure 4 The first optical path turning element 14 is a reflector. Fig. 9 The first optical path turning element 14 is a prism, which is described in detail as follows:

[0199] like Fig. 9 As shown, the first optical path turning element 14 is a prism and has a first light incident surface 142 and a first light emitting surface 143. The first light incident surface 142 is arranged toward the side where the positive lens L01 is located, and the first light emitting surface 143 is arranged toward the side where the rear lens group G10 is located.

[0200] The material of the prism can be glass, resin or other light-transmitting materials, which is not specifically limited here.

[0201] In some embodiments, Fig. 9 As shown, the first light path turning element 14 is a right-angle prism, the first light incident surface 142 and the first light exit surface 143 are respectively right-angle surfaces of the right-angle prism, and the first reflection surface 141 is the inclined surface of the right-angle prism. In addition to the right-angle prism, the first light path turning element 14 can also be set as a prism of other shapes.

[0202] In some embodiments, Fig. 9 As shown, the angle between the first reflective surface 141 and the second optical axis 12 is 45°, and the second optical axis 12 is perpendicular to the first optical axis 11. However, it is not limited thereto, and the angle between the first reflective surface 141 and the second optical axis 12 can also be set to other angles according to actual needs.

[0203] In some embodiments, Fig. 9 As shown, in at least one positive lens of the front lens group G0 , the positive lens adjacent to the prism is disposed apart from the first light incident surface 142 , that is, the positive lens L01 is disposed apart from the first light incident surface 142 .

[0204] Compared with designing the image side surface of the positive lens L01 to be a plane and attached to the first light incident surface 142, the positive lens L01 is set apart from the first light incident surface 142. This can increase the number of lens surfaces in the front lens group G0 and increase the design freedom of the front lens group G0, which is beneficial to correcting the aberration of the optical lens 10.

[0205] In some embodiments, Fig. 9 As shown, there is an air gap between the positive lens L01 and the first light incident surface 142. Of course, in addition to air, there may also be other media between the positive lens L01 and the first light incident surface 142, such as nitrogen, a transparent adhesive layer, etc., which is not specifically limited here.

[0206] In some embodiments, Fig.10a As shown, Fig.10a for Fig. 9Schematic diagram of the first anti-shake compensation movement of the front lens group G0, the front lens group G0 can swing around the first rotation center axis m (i.e., nodding movement) to compensate for the drift of the image plane caused by the shaking of the electronic device.

[0207] In some embodiments, Fig.10a As shown, the first rotation center axis m passes through the end point O1 of the optical axis segment 121 located on the first reflective surface 141 .

[0208] In some embodiments, Fig.10b As shown, Fig.10b for Fig. 9 The first rotation center axis m passes through the intersection point O2, where the first straight line k3 intersects with the edge line of one side of the first reflection surface 141 close to the rear lens group G10 and is parallel to the first optical axis 11.

[0209] Of course, the first rotation center axis m may also be located near the intersection point O2. The specific position near the intersection point O2 can be referred to Figure 5d The settings are described in , and will not be repeated here.

[0210] Among them, Fig.10b As shown, the intersection point O2 is located on the first light emitting surface 143. Of course, this is not limited thereto, and the intersection point O2 may also be located inside the prism.

[0211] In some embodiments, Fig.10c As shown, Fig.10c for Fig. 9 Schematic diagram of the third anti-shake compensation motion of the front lens group G0 in FIG. The front lens group G0 can swing around the second rotation center axis n (i.e., head shaking motion), and the second rotation center axis n coincides with the second optical axis 12.

[0212] Of course, the second rotation center axis n may also be parallel to the second optical axis 12. The second rotation center axis n is located near the second optical axis 12. The specific position near the second optical axis 12 can be referred to in Figure 5f The settings are described in , and will not be repeated here.

[0213] In some embodiments, Fig.10d As shown, Fig.10d for Fig. 9 Schematic diagram of the fourth anti-shake compensation movement of the front lens group G0 in FIG. The front lens group G0 can swing around the second rotation center axis n, and the second rotation center axis n coincides with the first optical axis 11.

[0214] Of course, the second rotation center axis n may also be parallel to the first optical axis 11. The second rotation center axis n is located close to the first optical axis 11. The specific position close to the first optical axis 11 can be referred to Figure 5hThe settings are described in , and will not be repeated here.

[0215] As for Fig. 9 For details on the settings of other components shown in Figure 4 The settings will not be described in detail here.

[0216] like Fig.11 As shown, Fig.11 This is a schematic diagram of the optical system of the camera in the fifth embodiment of the present application. Fig.11 The optical lens 10 shown in Fig. 9 The main differences of the optical lens 10 shown in FIG. 1 are: Fig.11 The number of positive lenses disposed on the object side of the first light path deflection element 14 of the optical lens 10 is different, as described in detail as follows:

[0217] Two positive lenses are disposed on the object side of the first optical path turning element 14 , namely a positive lens L01 and a positive lens L02 . The positive lens L02 is located between the positive lens L01 and the first light incident surface 142 , and the positive lens L02 is spaced apart from the first light incident surface 142 .

[0218] Of course, the number of positive lenses arranged on the object side of the first optical path turning element 14 is not limited to two, and can also be more than two, such as three, four, five, etc., and can be specifically set according to actual needs.

[0219] As for Fig.11 For details on the settings of other components shown in Fig. 9 The settings will not be described in detail here.

[0220] like Fig.12 As shown, Fig.12 It is a schematic diagram of the optical system of the camera in the sixth embodiment of the present application. Fig.12 The optical lens 10 shown in Fig. 9 The main differences of the optical lens 10 shown in FIG. 1 are: Fig.12 The optical lens 10 is not provided with the second optical path turning element 15 , so the optical lens 10 has two optical axes, namely the first optical axis 11 and the second optical axis 12 , and the photosensitive element 20 and the optical lens 10 are arranged along the second optical axis 12 .

[0221] As for Fig.12 For details on the settings of other components shown in Fig. 9 The settings will not be described in detail here.

[0222] like Fig.13 As shown, Fig.13 This is a light path diagram of the optical system of the camera in the seventh embodiment of the present application. Fig.13 The optical lens 10 shown in Figure 4The main difference between the optical lens 10 shown in FIG. 1 and FIG. 2 is that the first lens group G1 has a different structure, as described below:

[0223] The second lens L14 includes a positive lens L12 and a negative lens L13 which are arranged at intervals. This arrangement is equivalent to splitting the second lens L14 into a positive lens L12 and a negative lens L13, which is beneficial to increase the number of lens surfaces in the first lens group G1, increase the degree of freedom in the design of the first lens group G1, and thus is beneficial to correct the aberration of the optical lens 10.

[0224] When the optical power of the second lens L14 is positive, the combined optical power of the positive lens L12 and the negative lens L13 is positive; when the optical power of the second lens L14 is negative, the combined optical power of the positive lens L12 and the negative lens L13 is negative.

[0225] Among them, Fig.13 As shown, the negative lens L12 may be disposed between the first lens L11 and the positive lens L13, but is not limited thereto. The negative lens L12 may be disposed between the positive lens L13 and the third lens L15.

[0226] In some embodiments, Fig.13 As shown, there is an air gap between the positive lens L12 and the negative lens L13. Of course, the medium between the positive lens L12 and the negative lens L13 is not limited to air, and can also be other media, such as nitrogen, a glue layer, etc.

[0227] The following is a combination of specific parameters and simulation results. Fig.13 The optical system of the camera shown in FIG. 1 is described in detail.

[0228] As shown in Table 7.1 and Table 7.2, Table 7.1 shows some main parameters of the optical system of the camera in the seventh embodiment of the present application, and Table 7.2 shows the aspheric coefficients of each surface of the optical system of the camera in the seventh embodiment of the present application.

[0229] Table 7.1

[0230]

[0231] The units of the parameters of the radius of curvature, thickness, and clear radius in the table are all in mm. OBJ represents the object plane. The object distance is set to 1e+18mm in the infinite distance state and 100mm in the macro state. STO represents the stop (STOP), which is set between the first optical path turning element 14 and the first lens group G0 to limit the size of the clear aperture of the light beam entering and control the amount of light entering the optical system.

[0232] S1 represents the object side surface of the positive lens L01, and S2 represents the image side surface of the positive lens L01. MIRROR represents the first optical path turning element 14, which is a reflector and has the function of refracting light; S5 represents the object side surface of the first lens L11, and S6 represents the image side surface of the first lens L11. S7 represents the object side surface of the negative lens L12, and S8 represents the image side surface of the negative lens L12. S9 represents the object side surface of the positive lens L13, and S10 represents the image side surface of the positive lens L13. S11 represents the object side surface of the third lens L15, and S12 represents the image side surface of the third lens L15. S13 represents the object side surface of the fourth lens L21, and S14 represents the image side surface of the fourth lens L21. S15 represents the object side surface of the fifth lens L24, and S16 represents the image side surface of the fifth lens L24. PRISM represents the second optical path turning element 15, which is a prism having three surfaces S17, S18, and S19, wherein S17 is the second light incident surface 152 close to the object side, S18 is the second reflection surface 151, and S19 is the second light exit surface 153 close to the image side. IRCF represents the filter 30, which is an infrared filter, S20 is the object side surface of the filter 30, and S21 is the image side surface S22 of the filter 30. IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element 20.

[0233] The surface number S in the "Thickness" parameter series in the table n The corresponding value means the surface number S n Surface to surface number S n+1 The distance of the surface on the optical axis; the rule of positive and negative signs in front of the thickness parameter is as follows: S n The vertex of the surface (the intersection with the optical axis) is the calculation origin, S n+1 The vertex of the surface is positive on the left, negative on the right, positive on the bottom, and negative on the top. The radius of curvature in the table is the radius of curvature of the surface with the corresponding surface number at the optical axis; the rule for the positive and negative signs in front of the radius of curvature parameter is as follows: S n The vertex of the surface is the calculation origin. The center of the sphere is positive on the left, negative on the right, positive on the bottom, and negative on the top. The curvature radius of INF means that the surface corresponding to this parameter is a plane, and the curvature radius is infinite.

[0234] The thickness parameter of the aperture "-2.800" represents the distance between the object side surface S5 of the first lens L11 and the aperture STOP on the optical axis when the object distance is 1e+18 mm, and the thickness parameter of the aperture "-1.613" represents the distance between the object side surface S5 of the first lens L11 and the aperture STOP on the optical axis when the object distance is 100 mm; the thickness parameter of the third lens L15 "-0.450" represents the distance between the image side surface S12 of the third lens L15 and the object side surface S13 of the fourth lens L21 on the optical axis when the object distance is 1e+18 mm; the thickness parameter of the third lens L15 "-1.637" represents the distance between the image side surface S12 of the third lens L15 and the object side surface S13 of the fourth lens L21 on the optical axis when the object distance is 100 mm.

[0235] The explanation of the rules for the positive and negative signs in front of the curvature radius and thickness parameters in the above Table 7.1 applies not only to Table 7.1, but also to other tables in the following text.

[0236] It can be seen from Table 7.1 that for the camera in the seventh embodiment of the present application, when the object distance of the photographed scene is switched from infinity (long view) to macro 100mm (close view), the focusing stroke of the focusing lens group (i.e., the first lens group G1) is 1.187mm.

[0237] In some embodiments, the aspheric surface in the optical lens 1 can be defined by the following aspheric curve equation:

[0238]

[0239] Where z is the relative distance between the point r from the optical axis on the aspherical surface and the tangent plane tangent to the optical axis of the aspherical surface; r is the vertical distance between the point on the aspherical curve and the optical axis; c is the curvature; K is the cone coefficient; A i is the i-th order aspheric coefficient, please refer to Table 7.2 for details.

[0240] Table 7.2

[0241] Face number K <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> S1 0.00E+00 -2.92E-04 -3.45E-06 -2.15E-08 -1.73E-09 S2 0.00E+00 -3.29E-04 -2.67E-06 -3.86E-08 -1.03E-09 S3 / / / / / S4 / / / / / STO / / / / / S5 0.00E+00 1.42E-04 3.10E-06 1.78E-07 5.53E-08 S6 0.00E+00 9.46E-04 2.47E-05 -7.33E-07 -7.65E-08 S7 0.00E+00 2.17E-03 1.67E-04 -2.06E-05 4.62E-07 S8 0.00E+00 4.75E-03 -3.98E-05 1.65E-06 1.35E-07 S9 0.00E+00 5.19E-03 -2.74E-04 2.80E-05 -1.21E-07 S10 0.00E+00 1.01E-03 -3.54E-05 -3.73E-06 1.08E-06 S11 0.00E+00 1.59E-03 2.20E-04 -1.64E-05 2.33E-06 S12 0.00E+00 7.77E-04 1.73E-04 -1.05E-05 1.34E-06 S13 0.00E+00 -1.77E-02 1.71E-03 -1.34E-04 4.17E-06 S14 0.00E+00 -1.89E-02 1.51E-03 -9.27E-05 1.25E-07 S15 0.00E+00 3.61E-03 4.17E-04 -4.98E-05 3.39E-06 S16 0.00E+00 6.13E-03 -1.87E-04 5.14E-06 8.33E-08

[0242] As shown in Table 7.3 and Table 7.4, Table 7.3 shows other main parameters of the optical system of the camera in the seventh embodiment of the present application, and Table 7.4 shows the focal length and sens value of the optical system of the camera in the seventh embodiment of the present application when the object distance is infinity.

[0243] Table 73

[0244] parameter TTL Ih f F / # f1 f2 f3 f4 f5 f6 f7 Numeric 30.56 5.11 19.0 1.95 65.83 20.212 -12.15 10.986 16.981 -28.139 -13.047 unit mm mm mm / mm mm mm mm mm mm mm

[0245] Table 7.4 Object distance: INIFINITY

[0246] parameter f fg0 fg1 fg2 fg01 Sens f34 Numeric 19.000 65.830 10.538 -8.305 11.063 2.866 294.653 unit mm mm mm mm mm / mm

[0247] Among them, 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 L12, f4 is the focal length of the positive lens L13, f5 is the focal length of the third lens L15, f6 is the focal length of the fourth lens L21, f7 is the focal length of the fifth lens L24, f34 is the combined focal length of the negative lens L12 and the positive lens L13, f is the effective focal length of the optical lens 10, fg0 is the effective focal length of the front lens group G0, fg1 is the effective focal length of the first lens group G1, fg2 is the effective focal length of the second lens group G2, and fg01 is the combined focal length of the front lens group G0 and the first lens group G1.

[0248] like Fig.14 and Fig.15 As shown, Fig.14 This is a simulation effect diagram of the optical system of the camera in the seventh embodiment of the present application when the object distance is infinite. Fig.15 This is a simulation effect diagram of the optical system of the camera in the seventh embodiment of the present application when the object distance is 100 mm. Fig.14 and Fig.15 The axial spherical aberration (LONGITUDINAL SPERICALABERRATION) curve, the astigmatism and field curvature curves of each image height, and the optical distortion (DISTORTION) curve of the optical lens 10 are shown. Among them, the axial spherical aberration curve includes spherical aberration curves corresponding to different bands of the system (including 656.2725nm, 587.5618nm, and 486.1327nm in the figure); its physical meaning is the deviation of the light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system; its abscissa is the deviation value along the optical axis direction, and its ordinate is the normalized coordinate at the pupil. Fig.14 and Fig.15 The values ​​shown in the figure are all small, and the correction of the axial spherical aberration of the optical lens 10 is better. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of the fine light beams in different fields of view from the ideal imaging surface. x is the sagittal direction light beam, y is the meridian direction light beam, the horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Fig.14 and Fig.15 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point (actual image height) of the light beam in different fields of view and the ideal image height. Fig.14 and Fig.15 The deviation is small, which can ensure that the image has no obvious deformation. Therefore, the optical system of the camera in the seventh embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and air gap design.

[0249] like Fig.16 As shown, Fig.16 This is a light path diagram of the optical system of the camera in the eighth embodiment of the present application. Fig.16 The optical lens 10 shown in Fig.13 The main differences of the optical lens 10 shown in FIG. 1 are: Fig.16 Two positive lenses are provided on the object side of the first optical path turning element 14, namely, a positive lens L01 and a positive lens L02.

[0250] The following is a combination of specific parameters and simulation results. Fig.16 The optical system of the camera shown in FIG. 1 is described in detail.

[0251] As shown in Table 8.1 and Table 8.2, Table 8.1 shows some main parameters of the optical system of the camera in the eighth embodiment of the present application, and Table 8.2 shows the aspheric coefficients of each surface of the optical system of the camera in the eighth embodiment of the present application.

[0252] Table 8.1

[0253]

[0254]

[0255] The meanings of the symbols in Table 8.1 above are explained as follows:

[0256] The unit of the parameter values ​​of curvature radius, thickness, and light transmission radius in the table is mm. OBJ represents the object plane. In the infinite object distance state, the object distance is set to 1e+18mm, and in the macro state, the object distance is set to 100mm. STO represents the aperture (STOP), which limits the size of the light aperture that the light beam enters and controls the amount of light entering the optical system.

[0257] S1 represents the object side surface of the positive lens L01, and S2 represents the image side surface of the positive lens L01. S3 represents the object side surface of the positive lens L02, and S4 represents the image side surface of the positive lens L02. MIRROR represents the first optical path turning element 14, which is a reflector and has the function of refracting light; 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 negative lens L12, and S10 represents the image side surface of the negative lens L12. S11 represents the object side surface of the positive lens L13, and S12 represents the image side surface of the positive lens L13. S13 represents the object side surface of the third lens L15, and S14 represents the image side surface of the third lens L15. S15 represents the object side surface of the fourth lens L21, and S16 represents the image side surface of the fourth lens L21. S17 represents the object side surface of the fifth lens L24, and S18 represents the image side surface of the fifth lens L24. PRISM represents the second optical path turning element 15, which is a prism and has three surfaces S19, S20, and S21, wherein S19 is the second light incident surface 152 close to the object side, S20 is the second reflection surface 151, and S21 is the second light exit surface 153 close to the image side. IRCF represents the filter 30, which is an infrared filter 30, S22 is the object side surface of the filter 30, and S23 is the image side surface S22 of the filter 30. IMA represents the image plane IMAGE.

[0258] The curvature radius of 1.00E+18 represents that the surface corresponding to the parameter is a plane, and the curvature radius is infinite; the thickness parameter of the aperture "-2.769" represents the distance between the object-side surface S7 of the first lens L11 and the aperture on the optical axis when the object distance is 1e+18 mm, and the thickness parameter of the aperture "-1.575" represents the distance between the object-side surface S7 of the first lens L11 and the aperture on the optical axis when the object distance is 100 mm; the thickness parameter of the third lens L15 "-0.450" represents the distance between the image-side surface S14 of the third lens L15 and the object-side surface S15 of the fourth lens L21 on the optical axis when the object distance is 1e+18 mm; the thickness parameter of the third lens L15 "-1.644" represents the distance between the image-side surface S14 of the third lens L15 and the object-side surface S15 of the fourth lens L21 on the optical axis when the object distance is 100 mm.

[0259] It can be seen from Table 8.1 that for the camera in the eighth embodiment of the present application, when the object distance of the photographed scene is switched from infinity (long view) to macro 100mm (close view), the focusing stroke of the focusing lens group (i.e., the first lens group G1) is 1.194mm.

[0260] Table 8.2

[0261] Face number K <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> S1 0.000E+00 -9.172E-06 3.039E-07 9.259E-09 5.104E-10 S2 0.000E+00 6.673E-06 -2.209E-08 1.353E-08 6.090E-10 S3 0.000E+00 -3.064E-04 -2.687E-06 -1.683E-08 -1.305E-09 S4 0.000E+00 -3.064E-04 -2.687E-06 -1.683E-08 -1.305E-09 S5 / / / / / S6 / / / / / STO / / / / / S7 0.000E+00 4.806E-04 -1.507E-04 3.386E-05 -2.640E-06 S8 0.000E+00 1.426E-03 -3.153E-04 1.414E-04 -3.782E-05 S9 0.000E+00 1.504E-03 1.021E-03 -4.743E-04 1.354E-04 S10 0.000E+00 3.050E-03 2.361E-03 -1.364E-03 3.921E-04 S11 0.000E+00 4.627E-03 9.218E-04 -6.824E-04 1.826E-04 S12 0.000E+00 9.900E-04 -3.543E-05 -3.730E-06 1.078E-06 S13 0.000E+00 1.490E-03 4.446E-04 -2.201E-04 8.840E-05 S14 0.000E+00 7.912E-04 4.931E-04 -2.560E-04 9.485E-05 S15 0.000E+00 -1.770E-02 1.543E-03 -1.190E-04 1.566E-05 S16 0.000E+00 -1.809E-02 1.152E-03 -1.987E-04 1.342E-04 S17 0.000E+00 4.252E-03 7.701E-04 -5.161E-04 2.340E-04 S18 0.000E+00 6.449E-03 -4.344E-04 8.767E-05 -1.817E-05 Face number <![CDATA[A 12 ]]> <![CDATA[A 14 ]]> <![CDATA[A 16 ]]> <![CDATA[A 18 ]]> <![CDATA[A 20 ]]> S1 2.984E-11 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S2 1.917E-11 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S3 1.336E-11 -9.326E-13 0.000E+00 0.000E+00 0.000E+00 S4 1.336E-11 -9.326E-13 0.000E+00 0.000E+00 0.000E+00 S5 / / / / / S6 / / / / / STO / / / / / S7 -4.395E-07 1.267E-07 -1.251E-08 5.758E-10 -1.030E-11 S8 6.219E-06 -6.287E-07 3.783E-08 -1.239E-09 1.698E-11 S9 -2.412E-05 2.621E-06 -1.685E-07 5.858E-09 -8.425E-11 S10 -5.910E-05 4.146E-06 -2.343E-08 -1.275E-08 4.971E-10 S11 -1.883E-05 -4.979E-07 2.828E-07 -2.294E-08 6.156E-10 S12 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S13 -2.046E-05 2.872E-06 -2.346E-07 1.019E-08 -1.773E-10 S14 -2.097E-05 2.868E-06 -2.349E-07 1.056E-08 -2.000E-10 S15 -5.666E-06 1.303E-06 -1.618E-07 1.044E-08 -2.777E-10 S16 -5.555E-05 1.270E-05 -1.666E-06 1.181E-07 -3.514E-09 S17 -6.458E-05 1.111E-05 -1.150E-06 6.533E-08 -1.528E-09 S18 2.828E-06 -2.908E-07 1.878E-08 -6.850E-10 1.072E-11

[0262] As shown in Table 8.3 and Table 8.4, Table 8.3 shows other main parameters of the optical system of the camera in the eighth embodiment of the present application, and Table 8.4 shows the focal length and sens value of the optical system of the camera in the eighth embodiment of the present application when the object distance is infinity.

[0263] Table 8.3

[0264] parameter TTL Ih f F / # f1 f2 f3 f4 f5 f6 f7 f8 Numeric 31.00 5.11 19.654 1.95 106.200 126.823 17.669 -11.227 11.504 16.464 -28.040 -11.926 unit mm mm mm / mm mm mm mm mm mm mm mm

[0265] Table 8.4 Object distance: INIFINITY

[0266] parameter f fg0 fg1 fg2 fg01 Sens f12 f45 Numeric 19.654 57.880 10.335 -7.790 11.216 2.955 57.87 -181.466 unit mm mm mm mm mm / mm mm

[0267] Among them, f1 is the focal length of the positive lens L01, f2 is the focal length of the positive lens L02, f3 is the focal length of the first lens L11, f4 is the focal length of the negative lens L12, f5 is the focal length of the positive lens L13, f6 is the focal length of the third lens L15, f7 is the focal length of the fourth lens L21, f8 is the focal length of the fifth lens L24, f12 is the combined focal length of the positive lens L01 and the positive lens L02, f45 is the combined focal length of the negative lens L12 and the positive lens L13, f is the effective focal length of the optical lens 10, fg0 is the effective focal length of the front lens group G0, fg1 is the effective focal length of the first lens group G1, fg2 is the effective focal length of the second lens group G2, and fg01 is the combined focal length of the front lens group G0 and the first lens group G1.

[0268] like Fig.17 and Fig.18 As shown, Fig.17 This is a simulation effect diagram of the optical system of the camera in the eighth embodiment of the present application when the object distance is infinite. Fig.18 This is a simulation effect diagram of the optical system of the camera in the eighth embodiment of the present application when the object distance is 100 mm. Fig.17 and Fig.18 The axial spherical aberration curve, the astigmatism and field curvature curves at each image height, and the optical distortion curve of the optical lens 10 are shown. The axial spherical aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (including 656.2725nm, 587.5618nm, and 486.1327nm in the figure); its physical meaning is the deviation of the light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system; its abscissa is the deviation value along the optical axis, and its ordinate is the normalized coordinate at the pupil. Fig.17 and Fig.18The values ​​shown in the figure are all small, and the correction of the axial spherical aberration of the optical lens 10 is better. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of the fine light beams in different fields of view from the ideal imaging surface. x is the sagittal direction light beam, y is the meridian direction light beam, the horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Fig.17 and Fig.18 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point (actual image height) of the light beam in different fields of view and the ideal image height. Fig.17 and Fig.18 The deviation is small, which can ensure that the image has no obvious deformation. Therefore, the optical system of the camera in the eighth embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and air gap design.

[0269] like Fig.19 As shown, Fig.19 This is a light path diagram of the optical system of the camera in the ninth embodiment of the present application. Fig.19 The optical lens 10 shown in Fig.13 The main differences of the optical lens 10 shown in FIG. 1 are: Fig.19 The first optical path turning element 14 is a prism.

[0270] The following is a combination of specific parameters and simulation results. Fig.19 The optical system of the camera shown in FIG. 1 is described in detail.

[0271] As shown in Table 9.1 and Table 9.2, Table 9.1 shows some main parameters of the optical system of the camera in the ninth embodiment of the present application, and Table 9.2 shows the aspheric coefficients of each surface of the optical system of the camera in the ninth embodiment of the present application.

[0272] Table 9.1

[0273]

[0274]

[0275] The meanings of the symbols in Table 9.1 above are explained as follows:

[0276] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm. OBJ represents the object plane. The object distance is set to 1e+18mm in the infinite object distance state and 100mm in the macro state.

[0277] 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 optical path turning element 14, which is a prism and has the function of refraction of light. It has three surfaces S3, S4, and S5, wherein S3 is the first light incident surface 142 close to the object side, S4 is the first reflection surface 141, and S5 is the first light exit surface 143 close to the image side. S6 represents the object side surface of the first lens L11, and S7 represents the image side surface of the first lens L11. STO represents the aperture (STOP), which limits the size of the aperture through which the light beam enters and affects the amount of light entering the optical system. STO is located on the object side surface S6 of the L11 lens. S8 represents the object side surface of the negative lens L12, and S9 represents the image side surface of the negative lens L12. S10 represents the object side surface of the positive lens L13, and S11 represents the image side surface of the positive lens L13. S12 represents the object side surface of the third lens L15, and S13 represents the image side surface of the third lens L15. S14 represents the object side surface of the fourth lens L21, and S15 represents the image side surface of the fourth lens L21. S16 represents the object side surface of the fifth lens L24, and S17 represents the image side surface of the fifth lens L24. PRISM2 represents the second optical path turning element 15, which is a prism and has three surfaces S18, S19, and S20, wherein S18 is the second light incident surface 152 close to the object side, S19 is the second reflection surface 151, and S20 is the second light exit surface 153 close to the image side. IRCF represents the filter 30, which is an infrared filter 30, S21 is the object side surface of the filter 30, and S22 is the image side surface S22 of the filter 30. IMA represents the image plane IMAGE.

[0278] The thickness parameter of the S5 surface "-3.817" represents the distance between the object-side surface S6 of the first lens L11 and the S5 surface of the prism on the optical axis when the object distance is 1e+18mm; the thickness parameter of the S5 surface "-2.401" represents the distance between the object-side surface S6 of the first lens L11 and the S5 surface of the prism on the optical axis when the object distance is 100mm; the thickness parameter of the third lens L15 "-1.019" represents the distance between the image-side surface S13 of the third lens L15 and the object-side surface S14 of the fourth lens L21 on the optical axis when the object distance is 1e+18mm; the thickness parameter of the third lens L15 "-2.436" represents the distance between the image-side surface S13 of the third lens L15 and the object-side surface S14 of the fourth lens L21 on the optical axis when the object distance is 100mm.

[0279] It can be seen from Table 9.1 that for the camera in the ninth embodiment of the present application, when the object distance of the photographed scene is switched from infinity (long view) to macro 100mm (close view), the focusing stroke of the focusing lens group (i.e., the first lens group G1) is 1.416mm.

[0280] Table 9.2

[0281]

[0282]

[0283] As shown in Table 9.3 and Table 9.4, Table 9.3 shows other main parameters of the optical system of the camera in the ninth embodiment of the present application, and Table 9.3 shows the focal length and sens value of the optical system of the camera in the ninth embodiment of the present application when the object distance is infinity.

[0284] Table 9.3

[0285] parameter TTL Ih f F / # f1 f2 f3 f4 f5 f6 f7 Numeric 30.9 5.11 19.0 1.96 58.467 17.569 -10.312 11.307 19.144 -31.091 -14.914 unit mm mm mm / mm mm mm mm mm mm mm

[0286] Table 9.4 Object distance: INIFINITY

[0287] parameter f fg0 fg1 fg2 fg01 Sens f34 Numeric 19.000 58.467 11.698 -9.479 11.884 2.450 -87.854 unit mm mm mm mm mm / mm

[0288] Among them, 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 L12, f4 is the focal length of the positive lens L13, f5 is the focal length of the third lens L15, f6 is the focal length of the fourth lens L21, f7 is the focal length of the fifth lens L24, f34 is the combined focal length of the negative lens L12 and the positive lens L13, f is the effective focal length of the optical lens 10, fg0 is the effective focal length of the front lens group G0, fg1 is the effective focal length of the first lens group G1, fg2 is the effective focal length of the second lens group G2, and fg01 is the combined focal length of the front lens group G0 and the first lens group G1.

[0289] like Fig. 20 and Fig.21 As shown, Fig. 20 This is a simulation effect diagram of the optical system of the camera in the ninth embodiment of the present application when the object distance is infinite. Fig.21 This is a simulation effect diagram of the optical system of the camera in the ninth embodiment of the present application when the object distance is 100 mm. Fig. 20 and Fig.21 The axial spherical aberration curve, the astigmatism and field curvature curves at each image height, and the optical distortion curve of the optical lens 10 are shown. The axial spherical aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (including 656.2725nm, 587.5618nm, and 486.1227nm in the figure); its physical meaning is the deviation of the light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system; its abscissa is the deviation value along the optical axis, and its ordinate is the normalized coordinate at the pupil. Fig. 20 and Fig.21The values ​​shown in the figure are all small, and the correction of the axial spherical aberration of the optical lens 10 is better. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of the fine light beams in different fields of view from the ideal imaging surface. x is the sagittal direction light beam, y is the meridian direction light beam, the horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Fig. 20 and Fig.21 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point (actual image height) of the light beam in different fields of view and the ideal image height. Fig. 20 and Fig.21 The deviation is small, which can ensure that the image has no obvious deformation. Therefore, the optical system of the camera in the ninth embodiment of the present application can achieve lower light aberration control and obtain clear image quality through reasonable surface shape and air gap design.

[0290] like Fig. 22 As shown, Fig. 22 This is a light path diagram of the optical system of the camera in the tenth embodiment of the present application. Fig. 22 The optical lens 10 shown in Fig.19 The main differences of the optical lens 10 shown in FIG. 1 are: Fig. 20 The composition of the second lens group G2 in is different, as described below:

[0291] The fifth lens L24 includes a positive lens L22 and a negative lens L23 which are arranged at intervals, and the combined optical power of the positive lens L22 and the negative lens L23 is negative. Such an arrangement can increase the number of surfaces of the lenses in the second lens group G2, increase the design freedom of the second lens group G2, and thus facilitate the correction of the aberrations of the optical lens 10.

[0292] Among them, Fig. 22 As shown, the positive lens L22 is disposed between the fourth lens L21 and the negative lens L23, but it is not limited thereto, and the negative lens L23 may also be disposed between the fourth lens L21 and the positive lens L22.

[0293] In some embodiments, Fig. 22 As shown, there is an air gap between the positive lens L22 and the negative lens L23. However, it is not limited thereto, and the medium between the positive lens L22 and the negative lens L23 may be other media besides air, such as nitrogen, a glue layer, etc.

[0294] The following is a combination of specific parameters and simulation results. Fig.12 The optical system of the camera shown in FIG. 1 is described in detail.

[0295] As shown in Table 10.1 and Table 10.2, Table 10.1 shows some main parameters of the optical system of the camera 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 in the tenth embodiment of the present application.

[0296] Table 10.1

[0297]

[0298] The meanings of the symbols in Table 10.1 above are explained as follows:

[0299] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm. OBJ represents the object plane. The object distance is set to 1e+18mm in the infinite object distance state and 100mm in the macro state.

[0300] 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 optical path turning element 14, which is a prism and has the function of refraction of light. It has three surfaces S3, S4, and S5, wherein S3 is the first light incident surface 142 close to the object side, S4 is the first reflection surface 141, and S5 is the first light exit surface 143 close to the image side. S6 represents the object side surface of the first lens L11, and S7 represents the image side surface of the first lens L11. STO represents the aperture (STOP), which limits the size of the aperture through which the light beam enters and affects the amount of light entering the optical system. STO is located on the object side surface S6 of the L11 lens. S8 represents the object side surface of the negative lens L12, and S9 represents the image side surface of the negative lens L12. S10 represents the object side surface of the positive lens L13, and S11 represents the image side surface of the positive lens L13. S12 represents the object-side surface of the third lens L15, and S13 represents the image-side surface of the third lens L15. S14 represents the object-side surface of the fourth lens L21, and S15 represents the image-side surface of the fourth lens L21. S16 represents the object-side surface of the negative lens L22, and S17 represents the image-side surface of the negative lens L22. S18 represents the object-side surface of the positive lens L23, and S19 represents the image-side surface of the positive lens L23. IRCF represents the filter 30, which is an infrared filter 30, S21 represents the object-side surface of the filter 30, and S22 represents the image-side surface S22 of the filter 30. IMA represents the image plane IMAGE.

[0301] The thickness parameter of the S5 surface "-3.817" represents the distance between the object-side surface S6 of the first lens L11 and the S5 surface of the prism on the optical axis when the object distance is 1e+18 mm; the thickness parameter of the S5 surface "-2.408" represents the distance between the object-side surface S6 of the first lens L11 and the S5 surface of the prism on the optical axis when the object distance is 100 mm; the thickness parameter of the third lens L15 "-1.250" represents the distance between the image-side surface S13 of the third lens L15 and the object-side surface S14 of the fourth lens L21 on the optical axis when the object distance is 1e+18 mm; the thickness parameter of the third lens L15 "-2.659" represents the distance between the image-side surface S13 of the third lens L15 and the object-side surface S14 of the fourth lens L21 on the optical axis when the object distance is 100 mm.

[0302] It can be seen from Table 10.1 that for the camera in the tenth embodiment of the present application, when the object distance of the photographed scene is switched from infinity (long view) to macro 100mm (close view), the focusing stroke of the focusing lens group (i.e., the first lens group G1) is 1.409mm.

[0303] Table 10.2

[0304] Face number K <![CDATA[A4]]> <![CDATA[A6]]> <![CDATA[A8]]> <![CDATA[A 10 ]]> S1 / / / / / S2 / / / / / S3 / / / / / S4 / / / / / S5 / / / / / S6 0.00E+00 1.09E-04 -8.19E-06 -7.38E-08 -2.27E-08 S7 0.00E+00 2.67E-03 -1.77E-05 -7.74E-07 1.93E-08 S8 0.00E+00 7.03E-03 2.14E-05 -2.69E-05 9.59E-07 S9 0.00E+00 7.17E-03 7.53E-05 8.93E-06 -8.13E-07 S10 0.00E+00 6.62E-03 1.37E-04 2.95E-05 -1.24E-06 S11 0.00E+00 3.41E-03 7.35E-05 -1.99E-05 2.44E-07 S12 0.00E+00 1.30E-03 1.72E-04 -2.63E-05 8.46E-07 S13 0.00E+00 3.70E-04 4.39E-05 -4.72E-06 3.15E-07 S14 0.00E+00 -2.06E-02 2.08E-03 -1.60E-04 4.41E-06 S15 0.00E+00 -2.06E-02 1.75E-03 -1.03E-04 -3.88E-07 S16 0.00E+00 5.38E-03 1.42E-04 -1.37E-05 1.64E-06 S17 0.00E+00 7.43E-03 -2.33E-04 1.14E-05 -1.58E-07 S18 0.00E+00 1.17E-03 -7.10E-05 3.11E-06 -5.22E-08 S19 0.00E+00 1.76E-03 -6.81E-05 -1.93E-07 3.16E-08

[0305] As shown in Tables 10.3 and 10.4, Table 21 shows other main parameters of the optical system of the camera in the tenth embodiment of the present application, Table 22 shows the focal length and sens value of the optical system of the camera in the tenth embodiment of the present application when the object distance is infinity, Table 23 shows the focal length and sens value of the optical system of the camera in the tenth embodiment of the present application when the object distance is 100mm, and Table 24 shows the focal length and sens value of the optical system of the camera in the tenth embodiment of the present application when the object distance is 50mm.

[0306] Table 10.3

[0307] parameter TTL Ih f F / # f1 f2 f3 f4 f5 f6 f7 f8 Numeric 30.9 5.11 19.0 1.96 94.078 17.538 -9.412 10.154 17.594 -30.841 -9.418 26.45 unit mm mm mm / mm mm mm mm mm mm mm mm

[0308] Table 10.4 Object distance: INIFINITY

[0309] parameter f fg0 fg1 fg2 fg01 Sens f34 f78 Numeric 19.000 94.080 11.589 -9.591 11.986 2.472 -99.603 -15.284 unit mm mm mm mm mm / mm mm

[0310] Among them, 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 L12, f4 is the focal length of the positive lens L13, f5 is the focal length of the third lens L15, f6 is the focal length of the fourth lens L21, f7 is the focal length of the negative lens L22, f8 is the focal length of the positive lens L23, f34 is the combined focal length of the negative lens L12 and the positive lens L13, f78 is the combined focal length of the negative lens L22 and the positive lens L23, f is the effective focal length of the optical lens 10, fg0 is the effective focal length of the front lens group G0, fg1 is the effective focal length of the first lens group G1, fg2 is the effective focal length of the second lens group G2, and fg01 is the combined focal length of the front lens group G0 and the first lens group G1.

[0311] like Fig.23 and Fig.24 As shown, Fig.23 This is a simulation effect diagram of the optical system of the camera in the tenth embodiment of the present application when the object distance is infinite. Fig.24 This is a simulation effect diagram of the optical system of the camera in the tenth embodiment of the present application when the object distance is 100 mm. Fig.23 and Fig.24 The axial spherical aberration curve, the astigmatism and field curvature curves at each image height, and the optical distortion curve of the optical lens 10 are shown. The axial spherical aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (including 656.2725nm, 587.5618nm, and 486.1327nm in the figure); its physical meaning is the deviation of the light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system; its abscissa is the deviation value along the optical axis, and its ordinate is the normalized coordinate at the pupil. Fig.23 and Fig.24 The values ​​shown in the figure are all small, and the correction of the axial spherical aberration of the optical lens 10 is better. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of the fine light beams in different fields of view from the ideal imaging surface. x is the sagittal direction light beam, y is the meridian direction light beam, the horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Fig.23 and Fig.24 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point (actual image height) of the light beam in different fields of view and the ideal image height. Fig.23 and Fig.24 The deviation is small, which can ensure that the image has no obvious deformation. Therefore, the optical system of the camera in the tenth embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and air gap design.

[0312] like Fig.25 As shown, Fig.25This is a light path diagram of the optical system of the camera in the eleventh embodiment of the present application. Fig.25 The optical lens 10 shown in Fig.16 The main difference between the optical lens 10 shown in FIG. 1 and FIG. 2 is that the focus sensitivity parameter sens value is different, as described below: Fig.16 The sens value of the optical lens 10 shown in FIG. 1 is 2.955 when the focus distance is infinite. Fig.25 The sens value corresponding to the scene of the optical lens 10 shown in FIG. 1 when the focusing object distance is infinite is 1.71.

[0313] The following is a combination of specific parameters and simulation results. Fig.25 The optical system of the camera shown in FIG. 1 is described in detail.

[0314] As shown in Table 11.1 and Table 11.2, Table 11.1 shows some main parameters of the optical system of the camera in the eleventh embodiment of the present application, and Table 11.2 shows the aspheric coefficients of each surface of the optical system of the camera in the eleventh embodiment of the present application.

[0315] Table 11.1

[0316]

[0317]

[0318] The meanings of the symbols in Table 11.1 above are explained as follows:

[0319] The unit of the parameter values ​​of curvature radius, thickness, and light-clearance radius in the table is mm. OBJ stands for object plane. The object distance is set to 1e+18mm in the infinite distance state and 50mm in the macro state. STO stands for aperture (STOP), which limits the size of the light aperture for the light beam to enter and controls the amount of light entering the optical system.

[0320] S1 represents the object side surface of the positive lens L01, and S2 represents the image side surface of the positive lens L01. S3 represents the object side surface of the positive lens L02, and S4 represents the image side surface of the positive lens L02. MIRROR represents the first optical path turning element 14, which is a reflector and has the function of refracting light; S8 represents the object side surface of the first lens L11, and S9 represents the image side surface of the first lens L11. S10 represents the object side surface of the negative lens L12, and S11 represents the image side surface of the negative lens L12. S12 represents the object side surface of the positive lens L13, and S13 represents the image side surface of the positive lens L13. S14 represents the object side surface of the third lens L15, and S15 represents the image side surface of the third lens L15. S16 represents the object side surface of the fourth lens L21, and S17 represents the image side surface of the fourth lens L21. S18 represents the object side surface of the fifth lens L24, and S19 represents the image side surface of the fifth lens L24. PRISM represents the second optical path turning element 15, which is a prism and has three surfaces S20, S21, and S23, wherein S20 is the second light incident surface 152 close to the object side, S21 is the second reflection surface 151, and S23 is the second light exit surface 153 close to the image side. IRCF represents the filter 30, which is an infrared filter 30, S24 is the object side surface of the filter 30, and S25 is the image side surface S22 of the filter 30. IMA represents the image plane IMAGE.

[0321] The radius of curvature of 1.00E+18 represents that the surface corresponding to the parameter is a plane, and the radius of curvature is infinite; the thickness parameter "-4.485" of the aperture STO represents the distance between the object side surface S8 of the first lens L11 and the aperture on the optical axis when the object distance is 1e+18mm, and the thickness parameter "-0.500" of the aperture represents the distance between the object side surface S8 of the first lens L11 and the aperture on the optical axis when the object distance is 50mm; the thickness parameter "-0.450" of the third lens L15 represents the distance between the image side surface S15 of the third lens L15 and the object side surface S16 of the fourth lens L21 on the optical axis when the object distance is 1e+18mm; the thickness parameter "-4.435 of the third lens L15 represents the distance between the image side surface S15 of the third lens L15 and the object side surface S16 of the fourth lens L21 on the optical axis when the object distance is 50mm.

[0322] It can be seen from Table 11.1 that for the camera in the eighth embodiment of the present application, when the object distance of the photographed scene is switched from infinity (long view) to macro 50mm (close view), the focusing stroke of the focusing lens group (i.e., the first lens group G1) of the optical lens 10 is 3.985mm.

[0323] Table 11.2

[0324]

[0325]

[0326] As shown in Table 11.3 and Table 11.4, Table 11.3 shows other main parameters of the optical system of the camera in the eleventh embodiment of the present application, and Table 11.4 shows the focal length and sens value of the optical system of the camera in the eleventh embodiment of the present application when the object distance is infinite.

[0327] Table 11.3

[0328] parameter TTL Ih f F / # f1 f2 f3 f4 f5 f6 f7 f8 Numeric 32.91 5.11 19.68 1.98 82.032 183.385 20.005 -11.083 12.218 23.447 68.273 -11.037 unit mm mm mm / mm mm mm mm mm mm mm mm

[0329] Table 11.4 Object distance: INIFINITY

[0330] parameter f fg0 fg1 fg2 fg01 Sens f12 f45 Numeric 19.680 56.660 13.780 -29.200 14.540 1.71 56.66 -100.062 unit mm mm mm mm mm / mm mm

[0331] Among them, f1 is the focal length of the positive lens L01, f2 is the focal length of the positive lens L02, f3 is the focal length of the first lens L11, f4 is the focal length of the negative lens L12, f5 is the focal length of the positive lens L13, f6 is the focal length of the third lens L15, f7 is the focal length of the fourth lens L21, f8 is the focal length of the fifth lens L24, f12 is the combined focal length of the positive lens L01 and the positive lens L02, f45 is the combined focal length of the negative lens L12 and the positive lens L13, f is the effective focal length of the optical lens 10, fg0 is the effective focal length of the front lens group G0, fg1 is the effective focal length of the first lens group G1, fg2 is the effective focal length of the second lens group G2, and fg01 is the combined focal length of the front lens group G0 and the first lens group G1.

[0332] like Fig.26 and Fig. 27 As shown, Fig.26 This is a simulation effect diagram of the optical system of the camera in the eleventh embodiment of the present application when the object distance is infinite. Fig. 27 This is a simulation effect diagram of the optical system of the camera in the eleventh embodiment of the present application when the object distance is 50 mm. Fig.26 and Fig. 27 The axial spherical aberration curve, the astigmatism and field curvature curves at each image height, and the optical distortion curve of the optical lens 10 are shown. The axial spherical aberration curve includes spherical aberration curves corresponding to different wavelengths of the system (including 656.2725nm, 587.5618nm, and 486.1327nm in the figure); its physical meaning is the deviation of the light of the corresponding wavelength emitted in the 0-degree field of view from the ideal image point after passing through the optical system; its abscissa is the deviation value along the optical axis, and its ordinate is the normalized coordinate at the pupil. Fig.26 and Fig. 27The values ​​shown in the figure are all small, and the correction of the axial spherical aberration of the optical lens 10 is better. The astigmatism field curvature diagram is used to illustrate the deviation of the convergence point of the fine light beams in different fields of view from the ideal imaging surface. x is the sagittal direction light beam, y is the meridian direction light beam, the horizontal axis is the deviation value along the optical axis, and the vertical axis is the corresponding field of view. When a field of view value is too large, the image quality of the field of view is poor or there are high-level aberrations. Fig.26 and Fig. 27 The field curvature in both directions is small, and the system has a good depth of focus. The distortion diagram is used to characterize the relative deviation between the convergence point (actual image height) of the light beam in different fields of view and the ideal image height. Fig.26 and Fig. 27 The deviation is small, which can ensure that the image has no obvious deformation. Therefore, the optical system of the camera in the eleventh embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and air gap design.

[0333] The types of section lines in the drawings of this application are to distinguish different components and should not be understood as limiting the materials of the components. The drawings of this application are to illustrate the structural composition and are not shown in proportion to the actual product.

[0334] Although the description of this application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation mode. On the contrary, the purpose of introducing the application in conjunction with the implementation mode is to cover other options or modifications that may be extended based on the claims of this application. In order to provide a deep understanding of this application, many specific details will be included in the following description. This application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of this application, some specific details will be omitted in the description. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

[0335] In the embodiments of the present application, the terms "first", "second", "third", "fourth", and "fifth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", "fourth", and "fifth" may explicitly or implicitly include one or more of the features.

[0336] In the embodiments of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0337] 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 directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "left", "right", "inside", "outside", etc., are only reference directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of 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 therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two.

[0338] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0339] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, 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: The invention comprises a front lens group (G0) and a rear lens group (G10) arranged in a direction from the object side to the image side; the front lens group (G0) comprises a first optical path turning element (14) and at least one positive lens located on the object side of the first optical path turning element (14); the first optical path turning element (14) has a first reflecting surface (141); the first reflecting surface (141) is used to reflect a light beam passing through the at least one positive lens to the rear lens group (G10); The at least one positive lens has a first optical axis (11), the rear lens group (G10) has a second optical axis (12), the second optical axis (12) comprises an optical axis segment (121), an end point (O1) of the optical axis segment (121) is located on the first reflecting surface (141), and the optical axis segment (121) extends toward the image side of the first reflecting surface (141); The front lens group (G0) is an anti-shake compensation lens group and can swing around a first rotation center axis (m); the first rotation center axis (m) is perpendicular to the first optical axis (11) and the second optical axis (12), and the first rotation center axis (m) intersects with the optical axis segment (121) or is located close to the optical axis segment (121).

2. The optical lens according to claim 1, characterized in that: The first rotation center axis (m) is located on the image side of the first reflection surface (141), and the first rotation center axis (m) passes through the intersection point (O2) or is located close to the intersection point (O2); The intersection point (O2) is the intersection point of the first straight line (k3) and the optical axis segment (121), and the first straight line (k3) is parallel to the first optical axis (11) and intersects with the bottom edge (1411) of the first reflecting surface (141).

3. The optical lens according to claim 1 or 2, characterized in that: The front lens group (G0) can swing around the second rotation center axis (n); The second rotation center axis (n) coincides with the second optical axis (12); or, the second rotation center axis (n) is parallel to the second optical axis (12), and the second rotation center axis (n) is located close to the second optical axis (12).

4. The optical lens according to claim 1 or 2, characterized in that: The front lens group (G0) can swing around the second rotation center axis (n); The second rotation center axis (n) coincides with the first optical axis (11); or, the second rotation center axis (n) is parallel to the first optical axis (11), and the second rotation center axis (n) is located close to the first optical axis (11).

5. The optical lens according to any one of claims 1 to 4, characterized in that: The first optical path turning element (14) is a reflector; Alternatively, the first optical path turning element (14) is a prism and has a first light incident surface (142) and a first light emitting surface (143), wherein the first light incident surface (142) is arranged toward the side where the at least one positive lens is located, and the first light emitting surface (143) is arranged toward the side where the rear lens group (G10) is located; among the at least one positive lens, the positive lens adjacent to the prism is arranged to be separated from the first light incident surface (142).

6. The optical lens according to any one of claims 1 to 5, characterized in that: The rear lens group (G10) includes a first lens group (G1) and a second lens group (G2), the first lens group (G1) is located between the front lens group (G0) and the second lens group (G2), the first lens group (G1) is a focusing lens group, and can move relative to the front lens group (G0) along the second optical axis (12).

7. The optical lens according to claim 6, characterized in that: The focus sensitivity parameter of the optical lens is sens=[1-(fg01 / fg0) 2 ](f / fg01) 2 , wherein f is the effective focal length of the optical lens, fg0 is the effective focal length of the front lens group (G0), and fg01 is the combined focal length of the front lens group (G0) and the first lens group (G1); the focus sensitivity parameter sens satisfies: sens≥1.

7.

8. The optical lens according to claim 7, characterized in that: Sens meets the following requirements: sens ≥ 2.

3.

9. The optical lens according to claim 7 or 8, characterized in that: When the optical lens is in a state of focusing on a distant view, sens satisfies: 2.3≤sens≤3.

10. The optical lens according to any one of claims 6 to 9, characterized in that: The front lens group (G0) and the first lens group (G1) both have positive refractive power, and the second lens group (G2) has negative refractive power.

11. The optical lens according to claim 10, characterized in that: The first lens group (G1) includes a first lens (L11), a second lens (L14) and a third lens (L15) along the direction from the object side to the image side, the first lens (L11) and the third lens (L15) both have positive refractive power, the second lens (L14) has positive refractive power or negative refractive power, and there is a gap between two adjacent ones of the first lens (L11), the second lens (L14) and the third lens (L15); The second lens group (G2) includes a fourth lens (L21) and a fifth lens (L24) along the direction from the object side to the image side, the fourth lens (L21) and the fifth lens (L24) both have negative optical power, and there is a gap between the fourth lens (L21) and the fifth lens (L24).

12. The optical lens according to claim 11, characterized in that: The second lens (L14) includes a positive lens and a negative lens which are arranged apart from each other.

13. The optical lens according to claim 11 or 12, characterized in that: The fifth lens (L24) includes a positive lens and a negative lens which are arranged apart from each other.

14. The optical lens according to any one of claims 1 to 13, characterized in that: The optical lens further comprises a second optical path turning element (15), which is arranged on the image side of the rear lens group (G10), and the second optical path turning element (15) has a second reflecting surface (151), and the second reflecting surface (151) is used to reflect the light beam passing through the rear lens group (G10) toward one side of the second optical axis (12).

15. The optical lens according to claim 14, characterized in that: The second optical path turning element (15) is a reflector; Alternatively, the second optical path turning element (15) is a prism and has a second light incident surface (152) and a second light emitting surface (153), wherein the second light incident surface (152) is arranged toward the side where the rear lens group (G10) is located, and the second light emitting surface (153) is located on one side of the second optical axis (12).

16. A camera, characterized in that: The optical lens (10) comprises a photosensitive element (20) and any one of claims 1 to 15, wherein the photosensitive element (20) is arranged on the image side of the optical lens (10).

17. An electronic device, characterized in that: It comprises a housing (200) and the camera (100) described in claim 16, wherein the camera (100) is mounted on the housing (200).

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