Optical lens, camera module and electronic equipment

Abstract

The invention relates to the technical field of optical lenses, provides an optical lens, a camera module and electronic equipment, and can solve the problem that the thickness of the electronic equipment is large due to the fact that the camera module occupies a large space in the prior art. The optical lens comprises a front lens group, a first turning element, a first rear lens group and a second rear lens group, the front lens group comprises a first front lens group and a second front lens group; when the first turning element is located at the first position, the first turning element is located at the image side of the first front lens group and is used for reflecting an emergent light beam of the first front lens group to the first rear lens group, and the optical lens has a first effective focal length; when the first turning element is located at the second position, the first turning element is located at the image side of the second front lens group and is used for reflecting an emergent light beam of the second front lens group to the first rear lens group, the optical lens has a second effective focal length F2, and the second effective focal length is larger than the first effective focal length F1. The method can be applied to electronic equipment such as a mobile phone.

Description

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on February 28, 2024, with application number 202410224770.8 and application name “Motor, camera module and electronic device”, all contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the technical field of optical lenses, and in particular to an optical lens, a camera module and an electronic device. Background Art

[0003] At present, camera modules have become one of the important components of electronic devices such as mobile phones and tablets. The camera modules of electronic devices can easily obtain the desired photos to meet people's needs for taking photos. As electronic devices tend to be thinner and lighter, it is necessary to save space inside electronic devices while achieving high imaging performance of camera modules. Therefore, how to design camera modules to reduce the internal space occupied by electronic devices has become an important topic in the industry. Summary of the invention

[0004] The embodiments of the present application provide an optical lens, a camera module and an electronic device, which are used to solve the problem in the related art that the camera module occupies a large space, resulting in a large thickness of the electronic device.

[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 G0, a first turning element, a first rear lens group G1, and a second rear lens group G2 arranged along a direction from an object side to an image side; the front lens group G0 comprises a first front lens group G01 and a second front lens group G02 arranged along a first direction, the first direction being parallel to the optical axis of the first rear lens group G1; the first turning element can move between a first position and a second position along the first direction; when the first turning element is located at the first position, the first turning element is located at the image side of the first front lens group G01, and the first turning element is used to reflect the outgoing light beam of the first front lens group G01 to the first rear lens group G1, and the optical lens has a first effective focal length F 1 When the first turning element is located at the second position, the first turning element is located at the image side of the second front lens group G02, and the first turning element is used to reflect the outgoing light beam of the second front lens group G02 to the first rear lens group G1, and the optical lens has a second effective focal length F 2 , second effective focal length F 2 Greater than the first effective focal length F 1 .

[0007] The optical lens in the embodiment of the present application can move the first turning element along the first direction so that the first turning element can be moved to the image side of the first front lens group G01 and the second front lens group G02 respectively, so that an optical system with different effective focal lengths can be formed to achieve zooming of the optical lens. In the process of the first turning element moving along the first direction, no additional space is added in the light-incoming direction of the optical lens, which is conducive to reducing the space occupied by the camera module in the thickness direction of the electronic device, and further conducive to achieving lightweight and thin electronic devices.

[0008] In some embodiments of the first aspect, the movement stroke L of the first turning element between the first position and the second position satisfies: L≤23 mm. Such a configuration can prevent the movement stroke L of the first turning element from being too large, so that the actuator of the first turning element can be designed to be more compact, thereby making the structure of the camera module more compact.

[0009] In some embodiments of the first aspect, when the first turning element is at the first position, the first front lens group G01, the first turning element, the first rear lens group G1 and the second rear lens group G2 constitute a first optical system, and the total length of the first optical system is TTL 1 When the first turning element is in the second position, the second front lens group G02, the first turning element, the first rear lens group G1 and the second rear lens group G2 constitute a second optical system, and the total length of the second optical system is TTL 2 ; When the first turning element moves between the first position and the second position, the image plane position of the optical lens remains unchanged; TTL 1 、TTL 2 Meets: TTL 2 -TTL 1 ≤23mm. By reasonably setting the difference between the total lengths of the first optical system and the second optical system, it is possible to avoid the movement stroke L of the first turning element being too large, so that the actuator of the first turning element can be designed to be more compact, thereby making the structure of the camera module more compact.

[0010] In some embodiments of the first aspect, the effective focal length f of the first front lens group G01 is g01 , the effective focal length f of the second front lens group G02 g02 and the effective focal length f of the first rear lens group G1 g1 Meets: TTL 2 -TTL 1 =|f g02 -f g01 +k·f g1|; wherein k satisfies: 0≤|k|<1. Such a configuration can prevent the movement stroke L of the first turning element from being too large, thereby making the structure of the camera module more compact, which is beneficial to reducing the space occupied by the camera module.

[0011] In some embodiments of the first aspect, the effective focal length f of the first front lens group G01 is g01 , the effective focal length f of the second front lens group G02 g02 , the combined focal length f of the first front lens group G01 and the first rear lens group G1 g011 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 Satisfies: k = [(β 1 -1) 2 / β 1 ]-[(β 2 -1) 2 / β 2 ]; β 1 =f g011 / f g01 β 2 =f g021 / f g02 By setting the first focal length distribution ratio β 1 , the second focal length distribution ratio β 2 The size of the coefficient k can be controlled, and then the size of the moving stroke L of the first turning element can be controlled.

[0012] In some embodiments of the first aspect, k satisfies: 0.28≤k≤0.46. This configuration can not only reduce the space occupied by the camera module, but also help reduce the cost of the camera module.

[0013] In some embodiments of the first aspect, k=0. In this way, by properly setting the effective focal length f of the first front lens group G01 g01 , the effective focal length f of the second front lens group G02 g02 The difference can control the size of the moving stroke L of the first turning element.

[0014] In some embodiments of the first aspect, k is approximately equal to 0, that is, 0<k≤0.005. In this way, by properly setting the effective focal length f of the first front lens group G01 g01 , the effective focal length f of the second front lens group G02 g02 The difference can control the size of the moving stroke L of the first turning element.

[0015] In some embodiments of the first aspect, the effective focal length f of the first front lens group G01 is g01 The effective focal length f of the second front lens group G02g02 Satisfy: 4.5mm≤|f g02 -f g01 |≤12.9mm. Such a setting can not only reduce the space occupied by the camera module, but also help reduce the cost of the camera module.

[0016] In some embodiments of the first aspect, the TTL 1 、TTL 2 Meets: TTL 2 -TTL 1 Such an arrangement can avoid the difference between the effective focal lengths of the first optical system and the second optical system being too small, thereby facilitating the improvement of the zoom ratio (or zoom range) of the optical lens.

[0017] In some embodiments of the first aspect, the effective focal length f of the second front lens group G02 is g02 Greater than the effective focal length f of the first front lens group G01 g01 Such an arrangement can enable the optical lens to obtain a larger zoom range, thereby facilitating the improvement of the zoom performance of the optical lens.

[0018] In some embodiments of the first aspect, a light shielding device is provided on the object side of the first turning element, and when the first turning element is located at the first position, the light shielding device is used to shield the light beam directed to the image side of the second front lens group G02; when the first turning element is located at the second position, the light shielding device is used to shield the light beam directed to the image side of the first front lens group G01. This arrangement can avoid the generation of stray light to affect the imaging quality of the optical lens.

[0019] In some embodiments of the first aspect, the shading device includes a first variable aperture diaphragm and a second variable aperture diaphragm, the first variable aperture diaphragm is arranged on the object side or the image side of the first front lens group G01, and the second variable aperture diaphragm is arranged on the object side or the image side of the second front lens group G02. In this way, when the first turning element is located at the first position or the second position, the shading device can accurately control the amount of light passing through the optical lens, thereby facilitating improving the imaging quality of the optical lens.

[0020] In some embodiments of the first aspect, the shading device includes a first variable aperture diaphragm and a second variable aperture diaphragm, the first variable aperture diaphragm is arranged between the lenses of the first front lens group G01, and the second variable aperture diaphragm is arranged between the lenses of the second front lens group G02. In this way, when the first turning element is located at the first position or the second position, the shading device can accurately control the amount of light passing through the optical lens, thereby facilitating improving the imaging quality of the optical lens.

[0021] In some embodiments of the first aspect, the shading device includes a shielding plate; the shielding plate is arranged on the image side of the front lens group G0 and can move relative to the front lens group G0, when the first turning element is located at the first position, the shielding plate moves to the image side of the second front lens group G02; when the first turning element is located at the second position, the shielding plate moves to the image side of the first front lens group G01. Such an arrangement is conducive to simplifying the structure of the shading device, thereby helping to reduce the cost of the optical lens.

[0022] In some embodiments of the first aspect, the shading device includes a shielding plate; the shielding plate is disposed on the object side of the front lens group G0 and can move relative to the front lens group G0, when the first turning element is located at the first position, the shielding plate moves to the object side of the second front lens group G02; when the first turning element is located at the second position, the shielding plate moves to the object side of the first front lens group G01. Such a configuration is conducive to simplifying the structure of the shading device, thereby helping to reduce the cost of the optical lens.

[0023] In some embodiments of the first aspect, the first rear lens group G1 is a movable lens group and can move relative to the front lens group G0 along the first direction, and the second rear lens group G2 is a fixed lens group and is relatively fixed to the front lens group G0 along the first direction. In this way, when the first turning element is in the first position or the second position, the first rear lens group G1 can move along the first direction, thereby achieving precise focusing of the image plane IMA.

[0024] In some embodiments of the first aspect, when the first turning element is located at the first position, the effective focal length f of the first front lens group G01 is g01 , the combined focal length f of the first front lens group G01 and the first rear lens group G1 g011 , first effective focal length F 1 Satisfy: 1 =[1-β 1 2 ]α 1 2 , β 1 =f g011 / f g01 , α 1 =F 1 / f g011 , and 0<ξ 1 ≤3. Such an arrangement can not only reduce the focus stroke of the first rear lens group G1, which is beneficial to reducing the volume of the focus motor, but also avoid the focus stroke of the first rear lens group G1 being too short, reducing the accuracy requirement for the focus motor.

[0025] In some embodiments of the first aspect, when the first turning element is located at the second position, the effective focal length f of the second front lens group G02 is g02, the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 , Second effective focal length F 2 Satisfy: 2 =[1-β 2 2 ]α 2 2 , β 2 =f g021 / f g02 , α 2 =F 2 / f g021 , and 0<ξ 2 ≤3. Such an arrangement can not only reduce the focus stroke of the first rear lens group G1, which is beneficial to reducing the volume of the focus motor, but also avoid the focus stroke of the first rear lens group G1 being too short, reducing the accuracy requirement for the focus motor.

[0026] In some embodiments of the first aspect, the effective focal length f of the first front lens group G01 is g01 , the combined focal length f of the first front lens group G01 and the first rear lens group G1 g011 Satisfies: 0<β 1 ≤0.5; where β 1 =f g011 / f g01 This setting can avoid the stroke compression ratio coefficient ξ 1 Too small, which helps to reduce the focusing stroke of the first rear lens group G1.

[0027] In some embodiments of the first aspect, the effective focal length f of the second front lens group G02 is g02 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 Satisfies: 0<β 2 ≤0.5; where β 2 =f g021 / f g02 This setting can avoid the stroke compression ratio coefficient ξ 2 Too small, which helps to reduce the focusing stroke of the first rear lens group G1.

[0028] In some embodiments of the first aspect, the effective focal length f of the first front lens group G01 is g01 , the combined focal length f of the first front lens group G01 and the first rear lens group G1 g011 Satisfies: 0.75≤1-β 1 2 <1; where β 1 =f g011 / f g01Such an arrangement can not only reduce the focus stroke of the first rear lens group G1, which is beneficial to reducing the volume of the focus motor, but also avoid the focus stroke of the first rear lens group G1 being too short, reducing the accuracy requirements for the focus motor.

[0029] In some embodiments of the first aspect, the effective focal length f of the second front lens group G02 is g02 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 Satisfies: 0.75≤1-β 2 2 <1; where β 2 =f g021 / f g02 Such an arrangement can not only reduce the focus stroke of the first rear lens group G1, which is beneficial to reducing the volume of the focus motor, but also avoid the focus stroke of the first rear lens group G1 being too short, reducing the accuracy requirements for the focus motor.

[0030] In some embodiments of the first aspect, the combined focal length f of the first front lens group G01 and the first rear lens group G1 is g011 , first effective focal length F 1 Satisfies: 0<α 1 ≤2; where α 1 =F 1 / f g011 This setting can avoid the stroke compression ratio coefficient ξ 1 Too large, which can reduce the accuracy requirements for the focus motor.

[0031] In some embodiments of the first aspect, the combined focal length f of the second front lens group G02 and the first rear lens group G1 is g021 , Second effective focal length F 2 Satisfies: 0<α 2 ≤2; where α 2 =F 2 / f g021 This setting avoids the stroke compression ratio coefficient ξ 2 Too large, which can reduce the accuracy requirements for the focus motor.

[0032] In some embodiments of the first aspect, the optical power of the first front lens group G01, the second front lens group G02, and the first rear lens group G1 are all positive, and the optical power of the second rear lens group G2 is negative. This arrangement can offset some aberrations, thereby facilitating the reduction of aberrations of the optical lens.

[0033] In some embodiments of the first aspect, the first front lens group G01 and the second front lens group G02 each include at least one positive lens; the first rear lens group G1 includes a first lens L11, a second lens L12 and a third lens L13 along the direction from the object side to the image side, the first lens L11 and the third lens L13 both have positive optical power, the second lens L12 has negative optical power, and there is a gap between two adjacent lenses of the first lens L11, the second lens L12 and the third lens L13; the second rear lens group G2 includes a fourth lens L21 and a fifth lens L22 along the direction from the object side to the image side, the fourth lens L21 has negative optical power or positive optical power, the fifth lens L22 has negative optical power, and there is a gap between the fourth lens L21 and the fifth lens L22. Such an arrangement is conducive to correcting the aberration of the optical lens.

[0034] In some embodiments of the first aspect, the second lens L12 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.

[0035] In some embodiments of the first aspect, the fifth lens L22 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.

[0036] In some embodiments of the first aspect, the fifth lens L22 includes two negative lenses arranged at a distance from each other. Such an arrangement is conducive to correcting the aberration of the optical lens.

[0037] In some embodiments of the first aspect, the first turning element is a prism, and the first turning element includes a first incident surface and a first exit surface, the first incident surface is arranged toward the side where the front lens group is located, and the first exit surface is arranged toward the side where the first rear lens group is located.

[0038] In some embodiments of the first aspect, the first turning element is a reflector.

[0039] In some embodiments of the first aspect, the optical lens further comprises a second turning element disposed on the image side of the second rear lens group G2, the second turning element is a prism, and has a prism incident surface and a prism exit surface, the prism incident surface is disposed toward the side where the second rear lens group G2 is located, the prism exit surface is disposed toward the side where the image plane of the optical lens is located, and the prism exit surface is disposed at an angle relative to the optical axis of the second rear lens group G2. Such an arrangement can make the structure of the camera module more compact, which is conducive to reducing the thickness of the electronic device.

[0040] In some embodiments of the first aspect, the optical lens also includes a second turning element arranged on the image side of the second rear lens group G2, the second turning element is a prism, and has a prism incident surface and a prism exit surface, the prism incident surface is arranged toward the side where the second rear lens group G2 is located, and the prism exit surface is arranged toward the side of the image plane of the optical lens, the angle between the prism incident surface and the prism exit surface is a right angle, and the prism exit surface is parallel to the optical axis of the second rear lens group G2.

[0041] In some embodiments of the first aspect, the optical lens further includes a second folding element disposed on the image side of the second rear lens group G2, and the second folding element is a reflector.

[0042] In a second aspect, an embodiment of the present application provides a camera module, 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.

[0043] 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.

[0044] In a third aspect, an embodiment of the present application provides an electronic device, comprising a housing and the camera module described in the second aspect, wherein the camera module is mounted on the housing.

[0045] The beneficial effects of the electronic device 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1a Schematic diagram of the definition of the image side principal plane and image side principal point of the optical system;

[0047] Figure 1b Schematic diagram of the definition of the object principal surface and object principal point of the optical system;

[0048] Figure 1c Schematic diagram of the definition of object distance and image distance of an optical system;

[0049] Figure 2a A schematic structural diagram of an optical lens of a camera module installed in an electronic device in the related art in a first state;

[0050] Figure 2b A schematic diagram of the structure of an optical lens of a camera module in the related art in a second state;

[0051] Figure 3 A schematic diagram of the back side of an electronic device (mobile phone) in some embodiments of the present application;

[0052] Figure 4 for Figure 3 AA cross-sectional view of the electronic device in;

[0053] Figure 5 for Figure 4 A schematic diagram of the structure of the electronic device in another state;

[0054] Figure 6 This is a schematic structural diagram of the optical lens in the first embodiment of the present application when it is in a short-focus state;

[0055] Figure 7 This is a schematic structural diagram of the optical lens in the first embodiment of the present application when it is in a telephoto state;

[0056] Figure 8 It is a principle diagram of the optical lens in the first embodiment of the present application when it is in a short-focus state and a long-focus state;

[0057] Fig. 9 This is a focusing principle diagram of the optical lens in the first embodiment of the present application when it is in a short-focus state;

[0058] Fig.10 This is a schematic structural diagram of the optical lens in the second embodiment of the present application when it is in a telephoto state;

[0059] Fig.11 This is a schematic structural diagram of the optical lens in the third embodiment of the present application when it is in a telephoto state;

[0060] Fig.12 This is a schematic structural diagram of the optical lens in the fourth embodiment of the present application when it is in a telephoto state;

[0061] Fig.13 This is a schematic structural diagram of the optical lens in the fourth embodiment of the present application when it is in a telephoto state;

[0062] Fig.14a This is a schematic structural diagram of the optical lens in the fifth embodiment of the present application when it is in a short-focus state;

[0063] Fig.14b Schematic diagram of the structure of the optical lens in the fifth embodiment of the present application when it is in a telephoto state;

[0064] Fig.14c Schematic diagram of the structure of the optical lens in the sixth embodiment of the present application when it is in a short-focus state;

[0065] Fig.14d This is a schematic structural diagram of the optical lens in the sixth embodiment of the present application when it is in a telephoto state;

[0066] Fig.15a Schematic diagram of the structure of the optical lens in the seventh embodiment of the present application when it is in a short-focus state;

[0067] Fig.15b Schematic diagram of the structure of the optical lens in the seventh embodiment of the present application when it is in a telephoto state;

[0068] Fig.15c is an axial spherical aberration curve of the optical lens in the seventh embodiment of the present application when in a short focal state;

[0069] Fig.15d The field curvature curve and the distortion curve of the optical lens in the seventh embodiment of the present application when in a short-focus state;

[0070] Fig.15e is an axial spherical aberration curve of the optical lens in the seventh embodiment of the present application when in a telephoto state;

[0071] Fig.15f The field curvature curve and the distortion curve of the optical lens in the seventh embodiment of the present application when in a telephoto state;

[0072] Fig.16a Schematic diagram of the structure of the optical lens in the eighth embodiment of the present application when it is in a short-focus state;

[0073] Fig.16b Schematic diagram of the structure of the optical lens in the eighth embodiment of the present application when it is in a telephoto state;

[0074] Fig.16c axial spherical aberration curve, field curvature curve, and distortion curve of the optical lens in the eighth embodiment of the present application when in a short-focus state;

[0075] Fig.16d An axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens in the eighth embodiment of the present application when in a telephoto state;

[0076] Fig.17a Schematic diagram of the structure of the optical lens in the ninth embodiment of the present application when it is in a short-focus state;

[0077] Fig.17b Schematic diagram of the structure of the optical lens in the ninth embodiment of the present application when it is in a telephoto state;

[0078] Fig.17c is an axial spherical aberration curve of the optical lens in the ninth embodiment of the present application when in a short-focus state;

[0079] Fig.17d The field curvature curve and the distortion curve of the optical lens in the ninth embodiment of the present application when in a short-focus state;

[0080] Fig.17e is an axial spherical aberration curve of the optical lens in the ninth embodiment of the present application when in a telephoto state;

[0081] Fig.17f are the field curvature curve and the distortion curve of the optical lens in the ninth embodiment of the present application when in a telephoto state;

[0082] Fig.18a Schematic diagram of the structure of the optical lens in the tenth embodiment of the present application when it is in a short-focus state;

[0083] Fig.18b Schematic diagram of the structure of the optical lens in the tenth embodiment of the present application when it is in a telephoto state;

[0084] Fig.18c axial spherical aberration curve, field curvature curve, and distortion curve of the optical lens in the tenth embodiment of the present application when in a short-focus state;

[0085] Fig.18d axial spherical aberration curve, field curvature curve, and distortion curve of the optical lens in the tenth embodiment of the present application when in a telephoto state;

[0086] Fig.19a Schematic diagram of the structure of the optical lens in the eleventh embodiment of the present application when it is in a short-focus state;

[0087] Fig.19b is a schematic structural diagram of the optical lens in the eleventh embodiment of the present application when it is in a telephoto state;

[0088] Fig.19c axial spherical aberration curve, field curvature curve, and distortion curve of the optical lens in the eleventh embodiment of the present application when in a short-focus state;

[0089] Fig.19d axial spherical aberration curve, field curvature curve and distortion curve of the optical lens in the eleventh embodiment of the present application when in a telephoto state. DETAILED DESCRIPTION

[0090] The following is an explanation and description of the relevant technical terms involved in the embodiments of the present application.

[0091] 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.

[0092] Positive lens, also known as converging lens or convex lens, has the function of converging light. Convex lens is divided into biconvex, plano-convex and concave-convex (or positive meniscus) forms.

[0093] Negative lens, also called diverging lens or concave lens, has a diverging effect on light. Concave lens is divided into double concave, plano-concave, convex-concave and other forms.

[0094] 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.

[0095] Focal length is a measurement method for measuring the convergence or divergence of light in an optical system. Focal length is divided into image-side focal length and object-side focal length. Image-side focal length is the distance from the image-side principal surface to the image-side focus. Similarly, 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 image-side focal length.

[0096] 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.

[0097] like Figure 1a As shown, AB is an incident light ray parallel to the optical axis. After it passes through the optical system (the optical system can be a single lens or a lens group formed by multiple lenses, etc.), 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'. Through Q', a plane perpendicular to the optical axis is made to intersect 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] The image plane is located on the image side of all lenses in the optical lens, and is the position where the image is formed after the light passes through each lens in the optical lens in sequence.

[0105] 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.

[0106] A variable aperture diaphragm refers to an diaphragm that can change the size of its aperture.

[0107] The pupil is the image of the aperture stop. The conjugate image of the aperture stop through the optical system in front of the aperture stop is called the entrance pupil, or simply the entrance pupil. The entrance pupil diameter is the diameter of the entrance pupil.

[0108] 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.

[0109] 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.

[0110] Total track length (TTL) refers to the distance from the surface of the optical lens (or optical system) closest to the object side to the image plane.

[0111] ImgH (Image Hight) represents half of the diagonal length of the effective photosensitive area on the photosensitive element, that is, the image height.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] Figure 2a The present invention is a schematic structural diagram of an optical lens of a camera module installed in an electronic device in the related art in a first state. Figure 2b FIG. 1 is a schematic diagram of the structure of an optical lens of a camera module in the related art in the second state. Figure 2a and Figure 2b As shown, the optical lens includes a turning element 01 and a lens group 02 arranged from the object side to the image side, the turning element 01 includes a first prism 011 and a second prism 012, the first prism 011 includes a first incident surface 0111, a first reflection surface 0112 and a first exit surface 0113, the second prism 012 includes a second incident surface 0121, a second reflection surface 0122 and a second exit surface 0123, the first reflection surface 0112 and the second reflection surface 0122 are in contact with each other, and the first incident surface 0111 and the second incident surface 0121 have different curvatures.

[0125] The turning element 01 can rotate between a first position and a second position. Figure 2aAs shown, when the turning element 01 is in the first position, the first incident surface 0111 faces the object side, and the light of the scene enters the first prism 011 from the first incident surface 0111, passes through the lens group 02 and irradiates the photosensitive surface of the photosensitive element 03 after being turned by the first prism 011. At this time, the optical lens has a first focal length; Figure 2b As shown, when the turning element 01 is located at the second position, the second incident surface 0121 faces the object side, and the light of the scene enters the second prism 012 from the second incident surface 0121. After being turned by the second prism 012, it passes through the lens group 02 and shines onto the photosensitive surface of the photosensitive element 03. At this time, the optical lens has a second focal length, and the second focal length is different from the first focal length.

[0126] This optical lens in the related art can adjust the incident surfaces of different prisms in the turning element 01 to face the object side by rotating the turning element 01. Since the incident surfaces of different prisms have different curvatures, the focal length of the optical lens can be changed, thereby achieving zooming of the optical lens.

[0127] However, the zoom of the optical lens requires the rotation of the turning element 01, so a larger space needs to be set up inside the camera module to avoid the movement of the first prism 011 and the second prism 012, which results in the camera module being larger in the light input direction of the optical lens (the Y direction in the figure), and then the electronic device being larger in the thickness direction, which is not conducive to the thinness of the electronic device.

[0128] The present application provides an optical lens, a camera module and an electronic device, wherein the optical lens comprises a movable turning element, and by moving the turning element to the image side of different front lens groups, different optical systems can be formed to achieve zooming. The turning element does not increase the occupied space in the light input direction of the optical lens during the movement, thereby facilitating the reduction of the thickness of the electronic device.

[0129] The technical solutions in some embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0130] 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 module. 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.

[0131] Figure 3 Schematic diagram of the back side of an electronic device (mobile phone) in some embodiments of the present application. Figure 4 for Figure 3 AA cross-sectional view of an electronic device in Figure 5 for Figure 4A schematic diagram of the structure of an electronic device in another state. Figure 3 to Figure 5 As shown, the electronic device includes a housing 200 , a display screen 300 and a camera module 100 , and the camera module 100 is mounted on the housing 200 .

[0132] In some embodiments, Figure 4 and Figure 5 As shown, the housing 200 includes a middle frame 210 (also called a front shell or front frame) and a back cover 220 (also called a battery cover). The display screen 300 is arranged on one side of the middle frame 210, and the back cover 220 is arranged on the other side of the middle frame 210. The back cover 220 and the middle frame 210 enclose a first accommodation space 230, and the camera module 100 is arranged in the first accommodation space 230. The display screen 300 and the middle frame 210 enclose a second accommodation space 240, and the second accommodation space 240 is used to arrange electronic devices such as a mainboard 400. The mainboard 400 is connected to the display screen 300 and the camera module 100 through flexible circuit boards.

[0133] 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. In addition to being installed in the first accommodation space 230, the camera module 100 may also be installed in the second accommodation space 240 to serve as a front camera module of the electronic device.

[0134] In some embodiments, Figure 4 and Figure 5 As shown, the camera module 100 includes an optical lens 10, a photosensitive element 20 and a filter 30. The photosensitive element 20 is located on the image side of the optical lens 10. The filter 30 is located between the optical lens 10 and the photosensitive element 20, so that light can pass through the optical lens 10 and illuminate the photosensitive surface of the photosensitive element 20.

[0135] 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 on the main board 400. The processor transmits the electrical signal to the display screen 300 to display the image of the photographed scene on the display screen 300.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] In some embodiments, Figure 3 As shown, the camera module 100 includes a camera housing 40 , a portion of the optical lens 10 , a photosensitive element 20 and a filter 30 are disposed in the camera housing 40 .

[0140] Figure 6 Schematic diagram of the structure of the optical lens in the first embodiment of the present application when it is in a short-focus state. Figure 7 Schematic diagram of the structure of the optical lens in the first embodiment of the present application when it is in a telephoto state. Figure 6 and Figure 7 As shown, the optical lens 10 includes a front lens group G0, a first turning element 1, a first rear lens group G1, and a second rear lens group G2 arranged along the object side to the image side. The front lens group G0 includes a first front lens group G01 and a second front lens group G02 arranged along a first direction X, and the first direction X is parallel to the optical axis of the first rear lens group G1.

[0141] The first turning element 1 can move between a first position and a second position along a first direction X; Figure 6 As shown, when the first turning element 1 is located at the first position, the first turning element 1 is located at the image side of the first front lens group G01 and is used to reflect the outgoing light beam of the first front lens group G01 to the first rear lens group G1. The optical lens 10 has a first effective focal length F 1 .

[0142] like Figure 7As shown, when the first turning element 1 is located at the second position, the first turning element 1 is located at the image side of the second front lens group G02 and is used to reflect the outgoing light beam of the second front lens group G02 to the first rear lens group G1. The optical lens 10 has a second effective focal length F 2 , second effective focal length F 2 Greater than the first effective focal length F 1 That is, the optical lens 10 is in a short-focus state when the first turning element 1 is located at the first position, and the optical lens 10 is in a long-focus state when the first turning element 1 is located at the second position.

[0143] Among them, Figure 3 and Figure 4 As shown, the back cover 220 is provided with a first camera window 221 and a second camera window 222, and the first camera window 221 and the second camera window 222 are arranged along the first direction X. The first camera window 221 is arranged opposite to the first front lens group G01 to ensure that the optical lens 10 can receive the light emitted by the object being photographed outside the shell 200 when it is in a short-focus state; the second camera window 222 is arranged opposite to the second front lens group G02 to ensure that the optical lens 10 can receive the light emitted by the object being photographed outside the shell 200 when it is in a long-focus state.

[0144] The optical lens 10 in the embodiment of the present application is as follows: Figure 6 and Figure 7 As shown, by moving the first turning element 1 along the first direction X, the first turning element 1 can be moved to the image side of the first front lens group G01 and the second front lens group G02 respectively, so that an optical system with different effective focal lengths can be formed to achieve zooming of the optical lens 10. In the process of the first turning element 1 moving along the first direction X, the occupied space in the light input direction Y of the optical lens (i.e., the thickness direction of the electronic device) will not be increased, which is conducive to reducing the occupied space of the camera module 100 in the thickness direction of the electronic device, and further conducive to achieving lightweight and thin electronic devices.

[0145] like Figure 6 and Figure 7 As shown, the moving stroke L of the first turning element 1 between the first position and the second position satisfies: L≤23mm. For example, the moving stroke L can be 8.218mm, 8.956mm, 12.906mm, 13.719mm, 22.834mm, etc. In this way, the moving stroke L of the first turning element can be prevented from being too large, so that the actuator (such as the driving motor) of the first turning element 1 can be designed to be more compact, thereby making the structure of the camera module more compact.

[0146] Among them, Figure 6 and Figure 7As shown, the moving stroke L can be the distance between the optical axis of the first front lens group G01 and the optical axis of the second front lens group G02.

[0147] Figure 8 1 is a schematic diagram of the optical lens 10 in the first embodiment of the present application when it is in a short focus state and a long focus state. Figure 6 and Figure 8 As shown in (1), when the first turning element 1 is located at the first position, the first front lens group G01, the first turning element 1, the first rear lens group G1 and the second rear lens group G2 constitute a first optical system, and the total length of the first optical system is TTL 1 ;like Figure 7 and Figure 8 As shown in (2) in FIG. 1 , when the first turning element 1 is located at the second position, the second front lens group G02, the first turning element 1, the first rear lens group G1 and the second rear lens group G2 constitute a second optical system, and the total length of the second optical system is TTL 2 .

[0148] Among them, Figure 6 and Figure 7 As shown, TTL 1 =A 1 A 2 +A 2 O, that is TTL 1 For line segment A 1 A 2 With line segment A 2 The sum of the lengths of O; TTL 2 =B 1 B 2 +B 2 O, that is TTL 2 For line segment B 1 B 2 With line segment B 2 The sum of the lengths of O. A 1 A is the intersection of the optical axis of the first front lens group G01 and the lens surface of the first front lens group G01 closest to the object side; 2 B is the intersection of the optical axis of the first front lens group G01 and the reflection surface of the first turning element 1, O is the intersection of the optical axis of the first rear lens group G1 and the image plane (ie, the photosensitive surface of the photosensitive element 20); 1 B is the intersection of the optical axis of the second front lens group G02 and the lens surface of the second front lens group G02 closest to the object side; 2 It is the intersection of the optical axis of the second front lens group G02 and the reflecting surface of the first turning element 1.

[0149] like Figure 8As shown in (1) and (2), when the first turning element 1 moves between the first position and the second position, the position of the image plane IMA of the optical lens 10 remains unchanged; TTL 1 、TTL 2 Meets: TTL 2 -TTL 1 ≤23mm. For example: TTL 2 -TTL 1 It can be 8.218mm, 8.956mm, 12.906mm, 13.719mm, 22.834mm, etc.

[0150] like Figure 8 As shown in (1) and (2), when the first turning element 1 moves between the first position and the second position, the position of the image plane IMA of the optical lens 10 remains unchanged, so the moving stroke L of the first turning element 1 between the first position and the second position is L=TTL 2 -TTL 1 , by defining TTL 2 -TTL 1 ≤23mm, which can avoid the moving stroke L of the first turning element 1 being too large, so that the actuator of the first turning element 1 can be designed to be more compact, thereby making the structure of the camera module 100 more compact, which is beneficial to reducing the occupied space of the camera module 100.

[0151] In some embodiments, Figure 6 , Figure 7 and Figure 8 As shown, the first rear lens group G1 is a movable lens group and can move along the first direction X relative to the front lens group G0, and the second rear lens group G2 is a fixed lens group and its position along the first direction X relative to the front lens group G0 is fixed.

[0152] Since the first rear lens group G1 is a movable lens group, and the second rear lens group G2 is a fixed lens group, Figure 8 As shown, when the first turning element 1 moves between the first position and the second position, the first rear lens group G1 can move along the first direction X to prevent the image plane IMA of the optical lens 10 from drifting, so that the position of the image plane IMA of the optical lens 10 remains unchanged. In addition, when the optical lens 10 is in the first position or the second position, and switches between focusing on a distant view and focusing on a close view, the first rear lens group G1 can move along the first direction X, so as to achieve precise focusing of the image plane IMA of the optical lens 10.

[0153] Among them, Figure 4 and Figure 5As shown, the front lens group G0 is a fixed lens group, and the first front lens group G01 and the second front lens group G02 are both fixed relative to the housing 200 of the electronic device. The first rear lens group G1 can move relative to the front lens group G0 along the first direction X, specifically: the first rear lens group G1 can move relative to the first front lens group G01 or the second front lens group G02 along the first direction X. The second rear lens group G2 is relatively fixed to the front lens group G0 along the first direction X, specifically: the second rear lens group G2 is relatively fixed to the first front lens group G01 or the second front lens group G02 along the first direction X.

[0154] In some embodiments, Figure 8 As shown, the effective focal length f of the first front lens group G01 is g01 , the effective focal length f of the second front lens group G02 g02 and the effective focal length f of the first rear lens group G1 g1 satisfy:

[0155] TTL 2 -TTL 1 =|f g02 -f g01 +k·f g1 |.

[0156] Among them, the coefficient k satisfies: 0≤|k|<1.

[0157] By relational TTL 2 -TTL 1 =|f g02 -f g01 +k·f g1 | It can be seen that the moving stroke L of the first turning element 1 is related to the effective focal length f of the first front lens group G01 g01 , the effective focal length f of the second front lens group G02 g02 , the effective focal length f of the first rear lens group G1 g1 By limiting 0≤|k|<1, it is possible to avoid |k| being too large, thereby preventing the movement stroke L of the first turning element 1 from being too large, and further making the structure of the camera module 100 more compact, which is beneficial to reducing the space occupied by the camera module 100.

[0158] In some embodiments, Figure 8 As shown, the effective focal length f of the first front lens group G01 is g01 , the effective focal length f of the second front lens group G02 g02 , the combined focal length f of the first front lens group G01 and the first rear lens group G1 g011 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 satisfy:

[0159] Coefficient k = [(β 1 -1) 2 / β 1 ]-[(β 2 -1) 2 / β 2 ].

[0160] Among them, the first focal length distribution ratio β 1 =f g011 / f g01 ; Second focal length distribution ratio β 2 =f g021 / f g02 .

[0161] According to the relation k=[(β 1 -1) 2 / β 1 ]-[(β 2 -1) 2 / β 2 ] It can be seen that the coefficient k and the first focal length allocation ratio β 1 , the second focal length distribution ratio β 2 By reasonably setting the first focal length distribution ratio β 1 , the second focal length distribution ratio β 2 The size of the coefficient k can be controlled, and then the size of the moving stroke L of the first turning element 1 can be controlled.

[0162] Below Figure 8 The optical lens 10 shown in FIG. 1 is used as an example to illustrate the relationship TTL 2 -TTL 1 =|f g02 -f g01 +k·f g1 |The derivation process:

[0163] like Figure 8 As shown in (1), when the object is at infinity, the image of the object formed by the first front lens group G01 is m01, and the image distance is V 01 =f g01 , the image m01 forms an image m1 after passing through the first rear lens group G1, and the conjugate image plane formed by the image m1 passing through the second rear lens group G2 is IMA.

[0164] Under the condition of the paraxial optical path model, the gap between the image-side principal surface of the first front lens group G01 and the object-side principal surface of the first rear lens group G1 is defined as:

[0165] d 011 =f g01 +f g1 -f g01 f g1 / fg011 ;

[0166] The object distance U from the image m01 to the first rear lens group G1 1 =d 011 -V 01 . Calculate the image distance V of image m1 according to Gauss's formula 1 as follows:

[0167] V 1 =U 1 f g1 / (U 1 -f g1 ) = f g1 (f g01 -f g011 ) / f g01 ;

[0168] The total length of the first optical system is as follows:

[0169] TTL 1 =d 011 +V 1 +V 2 -U 2 =f g01 +2f g1 -f g1 (f g01 / f g011 +f g011 / f g01 )+V 2 -U 2 ;

[0170] Similarly, if Figure 8 As shown in (2), the total length of the second optical system is as follows:

[0171] TTL 2 =f g02 +2f g1 -f g1 (f g02 / f g012 +f g021 / f g02 )+V 2 -U 2 ;

[0172] like Figure 8 As shown in (1) and (2) in FIG. 1 , when the first turning element 1 moves between the first position and the second position, the positions of the image plane IMA of the optical lens 10 and the second rear lens group G2 remain unchanged, so the image distance V of the second rear lens group G2 is 2 , object distance U 2The same in the first optical system (ie, G01+first turning element 1+G1+G2) and the second optical system (ie, G02+first turning element 1+G1+G2), TTL 2 With TTL 1 The difference is equal to the movement distance L of the first turning element 1 between the first position and the second position, so it can be obtained that:

[0173] L=TTL 2 -TTL 1 =f g02 -f g01 +f g1 [(β 1 -1) 2 / β 1 -(β 2 -1) 2 / β 2 ];

[0174] That is, L = |f g02 -f g01 +f g1 [(β 1 -1) 2 / β 1 -(β 2 -1) 2 / β 2 ]|.

[0175] In some embodiments, the coefficient k=0; wherein the first focal length allocation ratio β 1 The second focal length distribution ratio β 2 In this way, the moving stroke L of the first turning element 1 is equal to TTL. 2 -TTL 1 =|f g02 -f g01 |, the movement stroke L of the first turning element 1 is only related to the effective focal length f of the first front lens group G01 g01 , the effective focal length f of the second front lens group G02 g02 By properly setting the effective focal length f of the first front lens group G01 g01 , the effective focal length f of the second front lens group G02 g02 The difference can control the size of the moving stroke L of the first turning element 1.

[0176] In some embodiments, the coefficient k is approximately equal to 0, that is, 0<k≤0.005, for example, k is equal to 0.005, 0.004, 0.003, 0.002, 0.001, etc. Among them, the first focal length allocation ratio β 1 The second focal length distribution ratio β 2 Approximately equal (for example, the difference is within 0.005), such as β1 is 0.447, β 2 =0.448. With this configuration, the travel distance L of the first turning element 1 is TTL 2 -TTL 1 ≈|f g02 -f g01 |, the movement stroke L of the first turning element 1 is only related to the effective focal length f of the first front lens group G01 g01 , the effective focal length f of the second front lens group G02 g02 By properly setting the effective focal length f of the first front lens group G01 g01 , the effective focal length f of the second front lens group G02 g02 The difference can control the size of the moving stroke L of the first turning element 1.

[0177] In some embodiments, the coefficient k satisfies: 0.28≤k≤0.46; for example, the coefficient k may be 0.291, 0.375, 0.411, 0.454, etc. Among them, the first focal length allocation ratio β 1 The second focal length distribution ratio β 2 Not equal and with large differences (e.g., the difference is greater than 0.005), such as β 1 is 0.370, β 2 is 0.453. Such a setting can prevent the coefficient k from being too large or too small, and further prevent the moving stroke L of the first turning element 1 from being too large or too small. If the moving stroke L of the first turning element 1 is too large, the volume of the actuator of the first turning element 1 is large, which is not conducive to reducing the occupied space of the camera module 100; if the moving stroke L of the first turning element 1 is too small, the precision requirement of the actuator of the first turning element 1 is high, which is not conducive to reducing the cost of the camera module 100. By setting the coefficient k to: 0.28≤k≤0.46, it can reduce the occupied space of the camera module 100 and help reduce the cost of the camera module 100.

[0178] In some embodiments, the effective focal length f of the first front lens group G01 is g01 The effective focal length f of the second front lens group G02 g02 Satisfy: 4.5mm≤|f g02 -f g01 |≤12.9mm, for example f g02 -f g01 It can be 4.609mm, 7.409mm, 8.021mm, 12.795mm, 8.153mm, etc. This setting can avoid |f g02 -f g01 |Too big and too small, if |f g02 -f g01| is too large, then the moving stroke L of the first turning element 1 is too large, which is not conducive to reducing the occupied space of the camera module 100; if | f g02 -f g01 | is too small, then the moving stroke L of the first turning element 1 is too small, and the precision requirement of the actuator of the first turning element 1 is high, which is not conducive to reducing the cost of the camera module 100. g02 -f g01 |Set to: 7.2mm≤|f g02 -f g01 |≤12.9mm, which can not only reduce the space occupied by the camera module 100, but also help reduce the cost of the camera module 100.

[0179] In some embodiments, Figure 8 As shown, TTL 1 、TTL 2 Meets: TTL 2 -TTL 1 ≥8.1mm. This setting can avoid TTL 2 -TTL 1 Too small, if TTL 2 -TTL 1 If the effective focal length of the first optical system (G01+first turning element 1+G1+G2) and the second optical system (G02+first turning element 1+G1+G2) is too small, it is not conducive to improving the zoom ratio (or zoom range) of the optical lens 10. 1 、TTL 2 Set to TTL 2 -TTL 1 ≥8.1mm, which is beneficial to improving the zoom ratio (or zoom range) of the optical lens 10.

[0180] In some embodiments, Figure 8 As shown, the effective focal length f of the second front lens group G02 is g02 Greater than the effective focal length f of the first front lens group G01 g01 Compared to f g02 =f g01 or g02 <f g01 , by changing f g02 、f g01 Set to f g02 >f g01 Thus, when the first turning element 1 moves between the first position and the second position, the optical lens 10 can obtain a larger zoom range, thereby facilitating improving the zoom performance of the optical lens 10.

[0181] In some embodiments, Figure 6 As shown, when the first turning element 1 is located at the first position, that is, the optical lens 10 is in a short focal state, the effective focal length f of the first front lens group G01 is g01 , the combined focal length f of the first front lens group G01 and the first rear lens group G1 g011 , first effective focal length F 1 Satisfies: stroke compression ratio coefficient ξ 1 =[1-β 1 2 ]α 1 2 , β 1 =f g011 / f g01 , α 1 =F 1 / f g011 , and 0<ξ 1 ≤3. For example, ξ 1 It can be 2.25, 2.518, 2.263, 2.264, 2.212, etc.

[0182] By changing the stroke compression ratio coefficient ξ 1 Set to 0<ξ 1 ≤3, which can not only reduce the focusing stroke of the first rear lens group G1, which is beneficial to reducing the size of the focusing motor; it can also avoid the focusing stroke of the first rear lens group G1 being too short, reduce the accuracy requirements for the focusing motor, and help reduce costs.

[0183] In some embodiments, Figure 7 As shown, when the first turning element 1 is located at the second position, that is, the optical lens 10 is in a telephoto state, the effective focal length f of the second front lens group G02 is g02 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 , Second effective focal length F 2 Satisfies: stroke compression ratio coefficient ξ 2 =[1-β 2 2 ]α 2 2 , β 2 =f g021 / f g02 , α 2 =F 2 / f g021 , and 0<ξ 2 ≤3. For example, ξ 2 It can be 2.263, 2.363, 2.192, 2.064, 2.212, etc.

[0184] By changing the stroke compression ratio coefficient ξ 2 Set to 0<ξ 2≤3, which can not only reduce the focusing stroke of the first rear lens group G1, which is beneficial to reducing the size of the focusing motor; it can also avoid the focusing stroke of the first rear lens group G1 being too short, reduce the accuracy requirements for the focusing motor, and help reduce costs.

[0185] In order to facilitate the understanding of the correlation between the stroke compression ratio coefficient and the focus stroke, the definition and derivation process of the stroke compression ratio coefficient are explained below by taking the optical lens 10 in the short focus state as an example:

[0186] like Fig. 9 As shown, Fig. 9 : is a focusing principle diagram of the optical lens 10 in the first embodiment of the present application when it is in a short-focus state. Fig. 9 The light path in the figure is explained by taking the paths of two light rays emitted from an object point on an axis of the object being photographed as an example.

[0187] Assume that the initial object distance of the object photographed by the optical lens 10 is U, and the initial image distance is V. Fig. 9 As shown in (2), when the positions of the first front lens group G01, the first rear lens group G1, and the second rear 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. Fig. 9 As shown in (3), during the focusing process of the optical lens 10, the positions of the first front lens group G01 and the second rear lens group G2 remain unchanged, the object distance changes by △U, and the moving distance of the first rear lens group G1 (i.e., the focusing stroke) is △X, so that the position of the image plane IMA remains unchanged.

[0188] Will 1 Defined as: 1 =△V / △X (Formula 2);

[0189] 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:

[0190] 1 / U+1 / V=1 / F 1 (Formula 3);

[0191] like Fig. 9 As shown in (1) and (2), when the object moves to the right by △U, the positions of the first front lens group G01, the first rear lens group G1, and the second rear lens group G2 remain unchanged, and the image plane IMA (i.e., the focal plane) of the optical lens 10 moves to the right by △V;

[0192] 1 / (U-△U)+1 / (V+△V)=1 / F 1 ;

[0193] △V / △U=(V / U) 2 ≈(F1 / U) 2 ; Among them, (V / U) 2 ≈(F 1 / U) 2 The condition is that the absolute value of the object distance of the object is much larger than the absolute value of the focal length, that is, |U|>>|F 1 |.

[0194] It can be seen that the image plane IMA of the optical lens 10 moves rightward by △V=△U(F 1 / U) 2 (Formula 4);

[0195] like Fig. 9 As shown in (2), when the object moves to the right by △U, the object distance from the object to the principal surface of the first front lens group G01 is U 0 , the positions of the first front lens group G0, the first rear lens group G1, and the second rear lens group G2 remain unchanged, and the image m1 formed by the system composed of the first front lens group G01 and the first rear lens group G1 moves to the right by a distance of:

[0196] △U(f g01 / U 01 ) 2 =△U(f g01 / U 0 ) 2 (f g1 / U 1 ) 2 (Formula 5);

[0197] Among them, U 1 U represents the distance from the image m01 of the object after passing through the first front lens group G01 to the principal surface of the first rear lens group G1; 01 It represents the distance from the object plane to the principal plane of the combined system of the first front lens group G01 and the first rear lens group G1. Fig. 9 As shown in (3), when the object moves to the right by △U, the positions of the first front lens group G01, the second rear lens group G2 and the image plane IMA of the optical system remain unchanged, and the first rear lens group G1 moves to the left by △X;

[0198] The image m01 of the object formed by the first front lens group G01 moves to the right by △U (f g01 / U 0 ) 2 ;

[0199] The position of the image m1 formed by the first rear lens group G1 remains unchanged, that is:

[0200] [△U(f g01 / U 0 ) 2+△X]·(f g1 / U 1 ) 2 - △X = 0 (Formula 6);

[0201] Under the premise that the object distance (absolute value) of the object being photographed is much greater than the focal length (absolute value), it is considered that U 0 ≈U 01 ≈U;

[0202] From equations 2 to 6, we can get: 1 =△V / △X=[1-(f g011 / f g01 ) 2 ](F 1 / f g011 ) 2 =[1-β 1 2 ]α 1 2 ;

[0203] From 1 It can be seen from the formula that ξ 1 The size of f g011 、f g01 、F 1 related.

[0204] It can be seen from Formula 2 that the stroke compression ratio coefficient is the change in image distance caused by the focus lens group moving a unit distance. The larger the stroke compression ratio coefficient, the larger the change in image distance caused by the focus lens group moving a unit distance. During the focusing process of the optical lens 10, when the image distance change is constant, the larger the stroke compression ratio coefficient, the smaller the focus stroke △X; the smaller the stroke compression ratio coefficient, the larger the focus stroke △X. The physical meaning of the stroke compression ratio coefficient is to use a physical parameter to characterize the scheme of the first rear lens group G1 as the focus lens group (for example Figure 6 and Figure 7 The value of the first rear lens group G1 as a focusing lens group is that it has a shorter focusing stroke than the solution in which the first front lens group G01, the first rear lens group G1, and the second rear lens group G2 move as a group to focus.

[0205] Similarly, when the optical lens 10 is in the telephoto state, the stroke compression ratio coefficient ξ 2 =[1-β 2 2 ]α 2 2 .

[0206] In some embodiments, Figure 6 As shown, the effective focal length f of the first front lens group G01 is g01 , the combined focal length f of the first front lens group G01 and the first rear lens group G1 g011 Satisfies: 0<β 1 ≤0.5; for example, β 1 It can be 0.364, 0.367, 0.370, 0.447, etc. Among them, β 1 =f g011 / f g01 .

[0207] According to the relation ξ 1 =[1-β 1 2 ]α 1 2 It can be seen that the stroke compression ratio coefficient ξ 1 With β 1 is inversely proportional to the size of 1 Set to 0<β 1 ≤0.5, can avoid β 1 Too large, thus avoiding the stroke compression ratio coefficient ξ 1 This is beneficial to reducing the focusing stroke of the first rear lens group G1 and the size of the focusing motor.

[0208] In some embodiments, Figure 7 As shown, the effective focal length f of the second front lens group G02 is g02 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 Satisfies: 0<β 2 ≤0.5; for example, β 2 It can be 0.416, 0.439, 0.453, 0.464, 0.448, etc. Among them, β 2 =f g021 / f g02 .

[0209] According to the relation ξ 2 =[1-β 2 2 ]α 2 2 It can be seen that the stroke compression ratio coefficient ξ 2 With β 2 is inversely proportional to the size of 2 Set to 0<β 2 ≤0.5, can avoid β 2 Too large, thus avoiding the stroke compression ratio coefficient ξ 2 This is beneficial to reducing the focusing stroke of the first rear lens group G1 and the size of the focusing motor.

[0210] In some embodiments, Figure 6 As shown, the effective focal length f of the first front lens group G01 is g01 , the combined focal length f of the first front lens group G01 and the first rear lens group G1 g011 Satisfies: 0.75≤1-β 1 2 <1; where β 1 =f g011 / f g01 .

[0211] According to the relation ξ 1 =[1-β 1 2 ]α 1 2 It can be seen that the stroke compression ratio coefficient ξ 1 With 1-β 1 2 is proportional to the size of 1 2 Set to 0.75≤1-β 1 2 <1, so as to avoid 1-β 1 2 Too large or too small, thus avoiding the stroke compression ratio coefficient ξ 1 Being too large or too small can reduce the focusing stroke of the first rear lens group G1, which is beneficial to reducing the size of the focusing motor; it can also avoid the focusing stroke of the first rear lens group G1 being too short, reducing the accuracy requirements for the focusing motor, which is beneficial to reducing costs.

[0212] In some embodiments, Figure 7 As shown, the effective focal length f of the second front lens group G02 is g02 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 Satisfies: 0.75≤1-β 2 2 <1; where β 2 =f g021 / f g02 .

[0213] According to the relation ξ 2 =[1-β 2 2 ]α 2 2 It can be seen that the stroke compression ratio coefficient ξ 2 With 1-β 2 2 is proportional to the size of 2 2 Set to 0.75≤1-β 22 <1, so as to avoid 1-β 2 2 Too large or too small, thus avoiding the stroke compression ratio coefficient ξ 2 Being too large or too small can reduce the focusing stroke of the first rear lens group G1, which is beneficial to reducing the size of the focusing motor; it can also avoid the focusing stroke of the first rear lens group G1 being too short, reducing the accuracy requirements for the focusing motor, which is beneficial to reducing costs.

[0214] In some embodiments, Figure 6 As shown, the combined focal length f of the first front lens group G01 and the first rear lens group G1 is g011 , first effective focal length F 1 Satisfies: 0<α 1 ≤2; for example, α 1 It can be 1.611, 1.706, 1.620, 1.620, 1.662, etc. Among them, α 1 =F 1 / f g011 .

[0215] According to the relation ξ 1 =[1-β 1 2 ]α 1 2 It can be seen that the stroke compression ratio coefficient ξ 1 With α 1 is proportional to α. 1 Set to 0<α 1 ≤2, which can avoid α 1 Too large, thus avoiding the stroke compression ratio coefficient ξ 1 Too large, which can reduce the accuracy requirements for the focus motor and help reduce costs.

[0216] In some embodiments, Figure 7 As shown, the combined focal length f of the second front lens group G02 and the first rear lens group G1 is g021 , Second effective focal length F 2 Satisfies: 0<α 2 ≤2; for example, α 2 It can be 1.655, 1.710, 1.661, 1.622, 1.663, etc. Among them, α 2 =F 2 / f g021 .

[0217] According to the relation ξ 2 =[1-β 2 2 ]α 2 2 It can be seen that the stroke compression ratio coefficient ξ2 With α 2 is proportional to α. 2 Set to 0<α 2 ≤2, which can avoid α 2 Too large, thus avoiding the stroke compression ratio coefficient ξ 2 Too large, which can reduce the accuracy requirements for the focus motor and help reduce costs.

[0218] In some embodiments, Figure 6 and Figure 7 As shown, the optical power of the first front lens group G01, the second front lens group G02, and the first rear lens group G1 are all positive; the optical power of the second rear lens group G2 is negative.

[0219] By setting the focal length of the first front lens group G01 and the second front lens group G02 to be positive, the first front lens group G01 and the second front lens group G02 can focus the light beam, reduce the diameter of the light beam, and thus help reduce the diameter of the first rear lens group G1 and the second rear lens group G2. By setting the focal length of the first rear lens group G1 and the second rear lens group G2 to be positive or negative, some aberrations can be offset, which helps reduce the aberration of the optical lens 10 and ensure the imaging quality of the optical lens 10.

[0220] Of course, the optical power of the first rear lens group G1 and the second rear lens group G2 are swapped with each other, that is, the optical power of the first rear lens group G1 is negative, and the optical power of the second rear lens group G2 is positive.

[0221] In some embodiments, Figure 6 and Figure 7 As shown, the first front lens group G01 and the second front lens group G02 each include a positive lens. Specifically, the first front lens group G01 includes a positive lens L011, and the second front lens group G02 includes a positive lens L021;

[0222] The first rear lens group G1 includes a first lens L11, a second lens L12 and a third lens L13 along the direction from the object side to the image side. The first lens L11 and the third lens L13 both have positive optical power, and the second lens L12 has negative optical power. There is a gap between adjacent first lens L11, second lens L12 and third lens L13.

[0223] The second rear lens group G2 includes a fourth lens L21 and a fifth lens L22 along a direction from the object side to the image side. Both the fourth lens L21 and the fifth lens L22 have negative refractive power, and there is a gap between the fourth lens L21 and the fifth lens L22.

[0224] By using the positive, negative, and positive combinations of the focal powers of the lenses in the first lens group G1, it is more conducive to correcting the aberrations of the optical lens 10. Since there is a gap between the first lens L11, the second lens L12, and the third lens L13, the number of surfaces of the lenses in the first rear lens group G1 is increased, the degree of freedom in the design of the first rear lens group G1 is increased, and it is conducive to correcting the aberrations of the optical lens 10.

[0225] By using a negative and negative combination of the focal lengths of the lenses in the second rear lens group G2, it is beneficial to balance the focal lengths of the optical lens 10. Since there is a gap between the fourth lens L21 and the fifth lens L22, the number of surfaces of the lenses in the second rear lens group G2 is increased, and the degree of freedom in the design of the second rear lens group G2 is increased, which is beneficial to correcting the aberrations of the optical lens 10.

[0226] Of course, in addition to having negative optical power, the fourth lens L21 can also have positive optical power. In this way, the optical power of the lenses in the second rear lens group G2 is combined in a positive and negative manner, which is beneficial to offset positive and negative aberrations, thereby facilitating the correction of the aberrations of the optical lens 10.

[0227] In some embodiments, Figure 6 and Figure 7 As shown, the first turning element 1 is a prism, and the first turning element 1 includes a first incident surface 11, a first exit surface 12, and a first reflection surface 13. The first incident surface 11 is arranged toward the side where the front lens group G0 is located, and the first exit surface 12 is arranged toward the side where the first rear lens group G1 is located. The first reflection surface 13 is used to reflect the light beam entering the first turning element 1 from the first incident surface 11 to the first exit surface 12.

[0228] In some embodiments, Figure 6 and Figure 7 As shown, the first turning element 1 is a right-angle prism, the angle between the first incident surface 11 and the first exit surface 12 is a right angle, and the angle between the first reflecting surface 13 and the optical axis of the first rear lens group G1 is an acute angle, such as 45°.

[0229] Of course, the first turning element 1 may be a reflector in addition to a prism.

[0230] In some embodiments, Figure 6 As shown, the optical lens 10 also includes a first fixed barrel 41, the first rear 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 L12 and the third lens L13. 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 rear lens group G1 in the first fixed barrel 41.

[0231] In some embodiments, Figure 6 As shown, a light shielding ring 53 is provided at the edge of at least one of the first lens L11, the second lens L12 and the third lens L13 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 L12.

[0232] In some embodiments, Figure 6 As shown, the optical lens 10 further includes a second fixed barrel 42, the second rear 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 L22.

[0233] In some embodiments, Figure 6 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 L22 to eliminate stray light at the edge of the second rear 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.

[0234] Fig.10 Schematic diagram of the structure of the optical lens 10 in the second embodiment of the present application when it is in a telephoto state. Fig.10 The optical lens 10 shown is Figure 7 The main differences of the optical lens 10 shown are: Fig.10 The optical lens 10 in the embodiment is provided with a second turning element 3, as described in detail as follows:

[0235] like Fig.10 As shown, the optical lens 10 also includes a second turning element 3, which is arranged on the image side of the second rear lens group G2. The second turning element 3 is a prism and has a prism incident surface 31, a prism exit surface 32, and a prism reflection surface 33. The prism incident surface 31 is arranged toward the side where the second rear lens group G2 is located, and the prism exit surface 32 is arranged toward the side where the image plane of the optical lens 10 is located. The prism exit surface 32 is parallel to the optical axis of the second rear lens group G2, and the prism reflection surface 33 is used to reflect the light beam entering the second turning element 3 from the prism incident surface 31 to the prism exit surface 32.

[0236] By setting the second turning element 3, the light path of the optical lens 10 can be folded to reduce the size of the optical lens 10 along the first direction X, 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 surface) of the photosensitive element 20 in the first direction X, 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 Y of the electronic device.

[0237] In some embodiments, Fig.10 As shown, the second turning element 3 is a right-angle prism, the angle between the prism incident surface 31 and the prism exit surface 32 is a right angle, and the angle between the prism reflection surface 33 and the optical axis of the second rear lens group G2 is an acute angle, such as 45°.

[0238] Of course, the second turning element 3 may be a reflector in addition to a prism.

[0239] Fig.11 Schematic diagram of the structure of the optical lens 10 in the third embodiment of the present application when it is in a telephoto state. Fig.11 The optical lens 10 shown is Fig.10 The main difference of the optical lens 10 shown is that the prism exit surface 32 of the second turning element 3 is tilted relative to the optical axis of the second rear lens group G2, as described below:

[0240] like Fig.11 As shown, the second turning element 3 is a prism, and has a prism incident surface 31 and a prism exit surface 32. The prism incident surface 31 is arranged toward the side where the second rear lens group G2 is located, and the prism exit surface 32 is arranged toward the side of the image plane of the optical lens 10, and the prism exit surface 32 is inclined relative to the optical axis of the second rear lens group G2. For example, the angle between the prism exit surface 32 and the optical axis of the second rear lens group G2 can be 45°.

[0241] By tilting the prism exit surface 32 relative to the optical axis of the second rear lens group G2, in order to receive the output light beam of the second turning element 3, the photosensitive element 3 also needs to be tilted relative to the optical axis of the second rear lens group G2. In this way, the size of the photosensitive element 3 in the second direction Y (i.e., the thickness direction of the electronic device) can be reduced, thereby making the structure of the camera module 100 more compact, which is beneficial to reducing the thickness of the electronic device.

[0242] In some embodiments, Fig.11 As shown, the second turning element 3 is a secondary reflection prism, and the second turning element 3 has a prism reflection surface 33, and the prism reflection surface 33 is connected between the prism incident surface 31 and the prism exit surface 32. The prism exit surface 32 is both a refractive surface and a reflective surface. The light beam entering the second turning element 3 from the prism incident surface 31 is reflected twice by the prism exit surface 32 and the prism reflection surface 33, and then exits the second turning element 3 from the prism exit surface 32.

[0243] Among them, Fig.11As shown, the first angle θ1 between the prism exit surface 32 and the prism incident surface 31 is an acute angle, for example, the first angle is 45°; the second angle θ2 between the prism exit surface 32 and the prism reflection surface 33 is an acute angle, for example, the second angle is 30°; the third angle θ3 between the prism incident surface 31 and the prism reflection surface 33 is an obtuse angle, for example, the third angle is 105°.

[0244] Of course, the second turning element 3 is not limited to being a secondary reflection prism, and may also be a cubic reflection prism, a quadri-reflection prism, etc., which is not specifically limited here.

[0245] Fig.12 Schematic diagram of the structure of the optical lens 10 in the fourth embodiment of the present application when it is in a telephoto state. Fig.12 The optical lens 10 shown is Figure 7 The main difference of the optical lens 10 shown is that the structure of the front lens group G0 is different, as described below:

[0246] like Fig.12 As shown, the front lens group G0 also includes a third front lens group G03, and the third front lens group G03 is arranged between the first front lens group G01 and the second front lens group G02. The first turning element 1 also has a third position. When the first turning element 1 is located at the third position, the first turning element 1 is located at the image side of the third front lens group G03, and the optical lens 10 has a third effective focal length F 3 , and F 1 <F 3 <F 2 , that is, the optical lens 10 is in the mid-focus state. With such a configuration, the zoom range of the optical lens 10 can be increased, thereby facilitating the improvement of the zoom performance of the optical lens 10.

[0247] In some embodiments, Fig.12 As shown, the first front lens group G01 includes a positive lens (i.e., positive lens L011), the second front lens group G02 includes two positive lenses (i.e., positive lens L021 and positive lens L022), the two positive lenses in the second front lens group G02 are arranged apart, and the third front lens group G03 includes a positive lens (i.e., positive lens L031).

[0248] Since the second front lens group G02 includes two positive lenses arranged at an interval, this is beneficial to increase the number of lens surfaces in the second front lens group G02, and increase the degree of freedom in the design of the second front lens group G02, which is beneficial to correcting the aberration of the optical lens 10.

[0249] Fig.13 Schematic diagram of the structure of the optical lens 10 in the fourth embodiment of the present application when it is in a telephoto state. Fig.13 The optical lens 10 shown is Fig.10The main difference of the optical lens 10 shown is that the movable lens group in the optical lens 10 is different, as described below:

[0250] like Fig.13 As shown, the second rear lens group G2 is relatively fixed to the first rear lens group G1 to form a rear lens group G10, which is a movable lens group and can move relative to the front lens group G0 along the first direction X. In this way, when the optical lens 10 switches between focusing on the distant view and focusing on the near view, the rear lens group G10 can move along the first direction X to achieve the internal focus of the optical lens 10. In addition, when the first turning element 1 moves between the first position and the second position, the rear lens group G10 can move along the first direction X, such as Figure 8 As shown, when the first turning element 1 moves from the first position to the second position, the rear lens group G10 moves away from the first turning element 1 to prevent the image plane IMA of the optical lens 10 from drifting, thereby keeping the position of the image plane IMA of the optical lens 10 unchanged.

[0251] Fig.14a Schematic diagram of the structure of the optical lens 10 in the fifth embodiment of the present application when it is in a short-focus state. Fig.14b Schematic diagram of the structure of the optical lens 10 in the fifth embodiment of the present application when it is in a telephoto state. Fig.14a , Fig.14b The optical lens 10 shown is Figure 6 , Figure 7 The main differences of the optical lens 10 shown are: Fig.14a , Fig.14b The optical lens 10 shown is additionally provided with a shading device 2, which is described in detail as follows:

[0252] like Fig.14a and Fig.14b As shown, a shading device 2 is provided on the object side of the first turning element 1. Fig.14a As shown, when the first turning element 1 is located at the first position, the shading device 2 is used to block the light beam (i.e., the first light beam) directed toward the image side of the second front lens group G02. The first light beam may be the incident light beam of the second front lens group G02 (i.e., Fig.14a As shown), it may also be the outgoing light beam of the second front lens group G02, or it may be the light beam between the lenses of the second front lens group G02;

[0253] like Fig.14b As shown, when the first turning element 1 is located at the second position, the shading device 2 is used to block the light beam directed to the image side of the first front lens group G01 (i.e., the second light beam), which can be the incident light beam of the first front lens group G01 (i.e., Fig.14bAs shown), it can also be the outgoing light beam of the first front lens group G01, or it can be the light beam between the lenses of the first front lens group G01.

[0254] By setting the shading device 2, Fig.14a As shown, when the first turning element 1 is located at the first position, the shading device 2 can prevent the light beam from the second front lens group G02 from entering the interior of the optical lens 1, thereby avoiding the generation of stray light to affect the imaging quality of the optical lens 10 when it is in a short-focus state; Fig.14b As shown, when the first turning element 1 is located at the second position, the shading device 2 can prevent the light beam from the first front lens group G01 from entering the interior of the optical lens 1, thereby avoiding the generation of stray light to affect the imaging quality of the optical lens 10 when it is in a telephoto state.

[0255] In some embodiments, Fig.14a and Fig.14b As shown, the shading device 2 includes a first variable aperture diaphragm 21 and a second variable aperture diaphragm 22. The first variable aperture diaphragm 21 is arranged on the object side of the first front lens group G01, and the second variable aperture diaphragm 22 is arranged on the object side of the second front lens group G02.

[0256] like Fig.14a As shown, when the first turning element 1 is located at the first position, the first variable aperture diaphragm 21 is in an open state, and the second variable aperture diaphragm 22 is in a closed state to block the incident light beam of the second front lens group G02; Fig.14b As shown, when the first turning element 1 is located at the second position, the first variable aperture diaphragm 21 is in a closed state to block the incident light beam of the first front lens group G01, and the second variable aperture diaphragm 22 is in an open state.

[0257] With such arrangement, the shading device 2 can not only prevent the optical lens 10 from generating stray light, but also when the first turning element 1 is located at the first position, the first variable aperture diaphragm 21 can accurately control the amount of light passing through the optical lens 10 according to the brightness of the photographed scene, thereby facilitating the improvement of the imaging quality of the optical lens 10 when it is in a short-focus state; when the first turning element 1 is located at the second position, the second variable aperture diaphragm 22 can accurately control the amount of light passing through the optical lens 10 according to the brightness of the photographed scene, thereby facilitating the improvement of the imaging quality of the optical lens 10 when it is in a long-focus state.

[0258] In addition to being disposed on the object side of the first front lens group G01, the above-mentioned first variable aperture diaphragm 21 may also be disposed on the image side of the first front lens group G01, or may also be disposed between the lenses of the first front lens group G01; in addition to being disposed on the object side of the second front lens group G02, the above-mentioned second variable aperture diaphragm 22 may also be disposed on the image side of the second front lens group G02, or may also be disposed between the lenses of the second front lens group G02.

[0259] Fig.14c Schematic diagram of the structure of the optical lens 10 in the sixth embodiment of the present application when it is in a short-focus state. Fig.14d Schematic diagram of the structure of the optical lens 10 in the sixth embodiment of the present application when it is in a telephoto state. Fig.14c , Fig.14d The optical lens 10 shown is Fig.14a , Fig.14b The main difference between the optical lens 10 shown is that the structure of the shading device 2 is different, as described below:

[0260] like Fig.14c and Fig.14d As shown, the shading device 2 includes a shielding plate 23; the shielding plate 23 is arranged on the image side of the front lens group G0 and can move relative to the front lens group G0, as shown in FIG. Fig.14c As shown, when the first turning element 1 is located at the first position, the shielding plate 23 moves to the image side of the second front lens group G02 to shield the outgoing light beam of the second front lens group G02; Fig.14d As shown, when the first turning element 1 is located at the second position, the shielding plate 23 moves to the image side of the first front lens group G01 to shield the outgoing light beam of the first front lens group G01.

[0261] By setting the shading device 2 as a movable shielding plate 23, the shielding plate 23 can be moved to block the outgoing light beam of the first front lens group G01 or the second front lens group G02. In this way, there is no need to respectively set the shielding plates 23 at the positions of the first front lens group G01 and the second front lens group G02, which is beneficial to simplify the structure of the shading device 2 and thus beneficial to reducing the cost of the optical lens 10.

[0262] In addition to being disposed on the image side of the front lens group G0, the baffle plate 23 can also be disposed on the object side of the front lens group G0. Specifically, the baffle plate 23 is disposed on the object side of the front lens group G0 and can be moved relative to the front lens group G0. When the first turning element 1 is located at the first position, the baffle plate 23 moves to the object side of the second front lens group G02 to block the incident light beam of the second front lens group G02; when the first turning element 1 is located at the second position, the baffle plate 23 moves to the object side of the first front lens group G01 to block the incident light beam of the first front lens group G01.

[0263] Fig.15a Schematic diagram of the structure of the optical lens 10 in the seventh embodiment of the present application when it is in a short-focus state. Fig.15b : is a schematic diagram of the structure of the optical lens 10 in the seventh embodiment of the present application when it is in a telephoto state, Fig.15a and Fig.15b The optical paths of the first turning element 1 and the second turning element 3 are both expanded and replaced by parallel plates. Fig.15a , Fig.15b The optical lens 10 shown is Fig.10 The main difference of the optical lens 10 shown is that the second rear lens group G2 has a different structure, as described below:

[0264] like Fig.15a and Fig.15b As shown, the fifth lens L22 includes a positive lens L221 and a negative lens L222 which are arranged at intervals. The combined optical power of the positive lens L221 and the negative lens L222 is negative. Such an arrangement is equivalent to splitting the fifth lens L22 into a positive lens L221 and a negative lens L222, which is beneficial to increase the number of lens surfaces in the second rear lens group G2, increase the degree of freedom in the design of the second rear lens group G2, and thus is beneficial to correct the aberration of the optical lens.

[0265] Among them, Fig.15a and Fig.15b As shown, the positive lens L221 may be disposed between the fourth lens L21 and the negative lens L222, but it is not limited thereto. The negative lens L222 may be disposed between the positive lens L221 and the fourth lens L21.

[0266] In some embodiments, Fig.15a and Fig.15b As shown, there is an air gap between the positive lens L221 and the negative lens L222. Of course, the medium between the positive lens L221 and the negative lens L222 is not limited to air, and can also be other media, such as nitrogen, a glue layer, etc.

[0267] In some embodiments, Fig.15a and Fig.15b As shown, the first front lens group G01 includes a positive lens L011, and the second front lens group G02 includes a positive lens L021 and a negative lens L022 along the direction from the object side to the image side. By using the positive and negative combinations of the focal lengths of the lenses in the second front lens group G02, the positive and negative aberrations can be offset, which is beneficial to improving the imaging quality of the optical lens 10.

[0268] The following is a combination of specific parameters and simulation results. Fig.15a and Fig.15b The optical lens 10 shown in FIG. 1 is specifically described.

[0269] As shown in Tables 1.1 to 1.4, Table 1.1 shows the main parameters of the optical lens 10 in the seventh embodiment of the present application when it is in a short-focus state, and Table 1.2 shows the main parameters of the optical lens 10 in the seventh embodiment of the present application when it is in a long-focus state; Table 1.3 shows the aspheric coefficients of the surfaces of the optical elements when the optical lens 10 in the seventh embodiment of the present application is in a short-focus state; Table 1.4 shows the aspheric coefficients of the surfaces of the optical elements when the optical lens 10 in the seventh embodiment of the present application is in a long-focus state.

[0270] Table 1.1 Main parameters of the optical lens 10 in the seventh embodiment of the present application when it is in a short-focus state

[0271]

[0272] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm.

[0273] S1 represents the object side surface of the positive lens L011, and S2 represents the image side surface of the positive lens L011. PRISM1 represents the first turning element 1, which is a prism and has the function of refracting light; S3 represents the first light incident surface 11 of the first turning element 1, and S4 represents the first light exit surface 12 of the first turning element 1; S6 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 second lens L12, and S11 represents the image side surface of the second lens L12. S12 represents the object side surface of the third lens L13, and S13 represents the image side surface of the third lens L13. S14 represents the object side surface of the fourth lens L21, and S15 represents the image side surface of the fourth lens L21. S16 represents the object side surface of the positive lens L221, and S17 represents the image side surface of the positive lens L221. S18 represents the object side surface of the negative lens L222, and S19 represents the image side surface of the negative lens L222. PRISM2 represents the second turning element 3, which is a prism and has the function of refracting light; S20 represents the prism incident surface 31 of the second turning element 3; S21 represents the prism exit surface 32 of the second turning element 3; IRCF represents a filter, which is an infrared filter, S22 is the object side surface of the filter, and S23 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0274] 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 nThe vertex of the surface (the intersection with the optical axis) is the calculation origin, S n+1 The vertices of the surface are positive on the right and negative on the left.

[0275] The curvature radius in the table is the curvature radius of the surface with the corresponding surface number at the optical axis; the rules for the positive and negative signs in front of the curvature radius parameter are as follows: S n The vertex of the surface is the calculation origin, the center of the sphere is on the right and the center of the sphere is on the left. The curvature radius of 0.00E+00 means that the surface corresponding to this parameter is a plane and the curvature radius is infinite.

[0276] It should be noted that: the rules for the positive and negative signs in front of the thickness parameters in this table, the rules for the positive and negative signs in front of the curvature radius parameters, and the surface number S in the "Thickness" parameter series in the table n The explanation of the meaning of the corresponding numerical values ​​also applies to the tables below.

[0277] Table 1.2 Main parameters of the optical lens 10 in the seventh embodiment of the present application when in telephoto state

[0278]

[0279]

[0280] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm.

[0281] S1 represents the object side surface of the positive lens L021, and S2 represents the image side surface of the positive lens L021; S3 represents the object side surface of the negative lens L022, and S4 represents the image side surface of the negative lens L022; PRISM1 represents the first turning element 1, which is a prism and has the function of refracting light; S5 represents the first light incident surface 11 of the first turning element 1, and S6 represents the first light exit surface 12 of the first turning element 1; 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 second lens L12, and S11 represents the image side surface of the second lens L12. S12 represents the object side surface of the third lens L13, and S13 represents the image side surface of the third lens L13. S14 represents the object side surface of the fourth lens L21, and S15 represents the image side surface of the fourth lens L21. S16 represents the object side surface of the positive lens L221, and S17 represents the image side surface of the positive lens L221. S18 represents the object side surface of the negative lens L222, and S19 represents the image side surface of the negative lens L222. PRISM2 represents the second turning element 3, which is a prism and has the function of refracting light; S20 represents the prism incident surface 31 of the second turning element 3; S21 represents the prism exit surface 32 of the second turning element 3; IRCF represents a filter, which is an infrared filter, S22 is the object side surface of the filter, and S23 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0282] In some embodiments, the aspheric surface in the optical lens 10 can be defined by the following aspheric curve equation:

[0283]

[0284] 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, which can be found in Table 1.3 and Table 1.4.

[0285] Table 1.3 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the seventh embodiment of the present application is in a short focal state

[0286]

[0287]

[0288] Table 1.4 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the seventh embodiment of the present application is in the telephoto state

[0289] Face number K <![CDATA[A 0 ]]> <![CDATA[A 1 ]]> <![CDATA[A 2 ]]> <![CDATA[A 3 ]]> <![CDATA[A 4 ]]> <![CDATA[A 5 ]]> <![CDATA[A 6 ]]> <![CDATA[A 7 ]]> 0 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1 0 -1.45E-01 -1.12E-01 -6.60E-02 6.52E-03 2.54E-02 1.75E-03 2.77E-03 0.00E+00 2 0 -7.56E-02 -6.40E-02 -4.99E-02 -6.21E-04 1.65E-02 -4.51E-03 2.18E-03 0.00E+00 3 0 3.68E-02 1.03E-01 5.06E-02 -1.42E-02 -1.78E-02 5.71E-03 -3.92E-03 0.00E+00 4 0 -7.08E-02 2.10E-02 -2.44E-02 -5.90E-02 -4.12E-02 -1.96E-03 -8.24E-03 0.00E+00 5 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 7 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 8 0 -6.75E-01 -1.92E-01 -1.66E-02 1.74E-04 2.49E-03 8.27E-04 4.59E-05 0.00E+00 9 0 -8.52E-01 -2.26E-01 5.60E-02 -8.09E-03 2.23E-03 -7.87E-04 6.33E-04 0.00E+00 10 0 -9.85E-01 6.42E-02 3.34E-02 -1.63E-02 4.40E-03 -5.90E-04 4.77E-04 0.00E+00 11 0 -1.55E+00 5.21E-02 4.76E-03 -1.14E-02 6.64E-04 1.49E-05 3.38E-04 0.00E+00 12 0 -5.30E-01 2.45E-02 4.09E-02 8.45E-03 -2.28E-03 4.70E-04 2.80E-04 0.00E+00 13 0 -1.17E-01 2.70E-02 1.83E-02 7.22E-03 1.11E-03 5.76E-04 2.29E-04 0.00E+00 14 0 2.50E+00 -4.34E-02 5.18E-02 5.54E-03 5.90E-03 1.04E-03 1.01E-03 0.00E+00 15 0 2.55E+00 -1.38E-02 3.88E-02 -3.19E-03 1.76E-03 -2.28E-03 6.37E-04 0.00E+00 16 0 -6.57E-01 2.12E-01 -1.11E-02 -1.89E-04 -1.35E-03 -4.64E-03 4.03E-04 0.00E+00 17 0 -7.20E-01 1.78E-01 -1.16E-02 6.62E-03 3.28E-03 -2.42E-03 3.89E-04 0.00E+00 18 0 -1.18E+00 4.49E-03 -3.04E-02 -1.25E-02 2.00E-04 -3.26E-03 5.11E-04 0.00E+00 19 0 -2.54E+00 1.56E-01 -4.93E-02 4.93E-03 1.75E-03 3.08E-05 8.61E-04 0.00E+00 20 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 21 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 22 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 23 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 24 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 25 0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0290] As shown in Table 1.5, Table 1.6 and Table 1.7, Table 1.5 shows the basic parameters of the optical path of the optical lens 10 in the seventh embodiment of the present application when it is in the short focus state, Table 1.6 shows the basic parameters of the optical path of the optical lens 10 in the seventh embodiment of the present application when it is in the long focus state, and Table 1.7 shows the relevant parameters and ξ values ​​of the optical lens 10 in the seventh embodiment of the present application;

[0291] Table 1.5 Basic parameters of the optical path of the optical lens 10 in the seventh embodiment of the present application in the short focus state

[0292] parameter Ih <![CDATA[F 1 ]]> F / # <![CDATA[f L011 ]]> <![CDATA[f L11 ]]> <![CDATA[f L12 ]]> <![CDATA[f L13 ]]> <![CDATA[f 21 ]]> <![CDATA[f L221 ]]> <![CDATA[f L222 ]]> Numeric 6.000 22.787 2.000 38.846 42.527 -17.547 9.777 51.856 48.207 -9.266 unit mm mm mm mm mm mm mm mm mm mm

[0293] Table 1.6 Basic parameters of the optical path in the seventh embodiment of the present application when the optical lens 10 is in the telephoto state

[0294] parameter Ih <![CDATA[F 2 ]]> F / # <![CDATA[f L021 ]]> <![CDATA[f L022 ]]> <![CDATA[f L11 ]]> <![CDATA[f L12 ]]> <![CDATA[f L13 ]]> <![CDATA[f L21 ]]> <![CDATA[f L221 ]]> <![CDATA[f L222 ]]> Numeric 3.000 29.947 3.080 35.015 -177.934 42.527 -17.547 9.777 51.856 48.207 -9.266 unit mm mm mm mm mm mm mm mm mm mm mm

[0295] Table 1.7 Related parameters and ξ values ​​of the optical lens 10 in the seventh embodiment of the present application; wherein the object distance is INIFINITY (infinity)

[0296]

[0297] In Tables 1.5 to 1.7, F 1 is the first effective focal length of the optical lens 10; F 2 is the second effective focal length of the optical lens 10; f L011 is the focal length of the positive lens L011; f L021 is the focal length of the positive lens L021; f L022 is the focal length of the negative lens L022; f L11 is the focal length of the first lens L11, f L12 is the focal length of the second lens L12, f L13 is the focal length of the third lens L13, f L21 is the focal length of the fourth lens L21, f L221 is the focal length of the positive lens L221, f L222 is the focal length of negative lens L222, f g01 is the effective focal length of the first front lens group G01, f g02 is the effective focal length of the second front lens group G02, f g1 is the effective focal length of the first rear lens group G1, f g2 is the effective focal length of the second rear lens group G2, f g011 is the combined focal length of the first front lens group G01 and the first rear lens group G1, f g021 is the combined focal length of the second front lens group G02 and the first rear lens group G1, β1 is the first focal length distribution ratio, β 1 =f g011 / f g01 , β 2 is the second focal length distribution ratio, β 2 =f g021 / f g02 , α 1 is the third focal length distribution ratio, α 1 =F 1 / f g011 ; α 2 is the fourth focal length distribution ratio, α 2 =F 2 / f g021 ξ 1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short focal state, ξ 2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the telephoto state; L is the moving stroke of the first turning element 1 between the first position and the second position; coefficient k=[(β 1 -1) 2 / β 1 ]-[(β 2 -1) 2 / β 2 ].

[0298] Fig.15c is the axial spherical aberration curve of the optical lens 10 in the seventh embodiment of the present application when it is in a short focal state, Fig.15d 1 is a field curvature curve and a distortion curve of the optical lens 10 in the seventh embodiment of the present application when it is in a short-focus state; Fig.15e is the axial spherical aberration curve of the optical lens 10 in the seventh embodiment of the present application when in a telephoto state, Fig.15f 1 is a field curvature curve and a distortion curve of the optical lens 10 in the seventh embodiment of the present application when it is in a telephoto state. Figure 15c to Figure 15f The graph shows axial spherical aberration curves, field curvature curves and distortion curves corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0299] The axial spherical aberration curve in the figure is used to illustrate the deviation of light of corresponding wavelength emitted in a 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.15c and Fig.15e The deviation values ​​are all small, and the axial spherical aberration of the optical lens is better corrected.

[0300] The field curvature curve in the figure 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 beam, y is the meridian beam, the abscissa is the deviation value along the optical axis, and the ordinate 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.15d and Fig.15f The field curvature in both directions is small, and the system has a good depth of focus.

[0301] The distortion curve in the figure is used to illustrate the relative deviation between the convergence point of the light beam in different fields of view (actual image height) and the ideal image height. Fig.15d and Fig.15f The deviation shown is small, ensuring that there is no noticeable distortion in the image.

[0302] Therefore, the optical lens 10 in the seventh embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and gap design, etc.

[0303] Fig.16a Schematic diagram of the structure of the optical lens 10 in the eighth embodiment of the present application when it is in a short-focus state. Fig.16b : is a schematic structural diagram of the optical lens 10 in the eighth embodiment of the present application when it is in a telephoto state. Fig.16a and Fig.16b The optical paths of the first turning element 1 and the second turning element 3 are both expanded and replaced by parallel plates. Fig.16a , Fig.16b The optical lens 10 shown is Fig.10 The main difference of the optical lens 10 shown is that the structure of the first rear lens group G1 is different, as described below:

[0304] like Fig.16a and Fig.16b As shown, the second lens L12 includes a positive lens L121 and a negative lens L122 which are arranged at intervals. The combined optical power of the positive lens L121 and the negative lens L122 is negative. Such an arrangement is equivalent to splitting the second lens L12 into the positive lens L121 and the negative lens L122, which is beneficial to increase the number of lens surfaces in the first rear lens group G1, increase the degree of freedom in the design of the first rear lens group G1, and thus is beneficial to correct the aberration of the optical lens.

[0305] Among them, Fig.16a and Fig.16b As shown, the positive lens L121 may be disposed between the first lens L11 and the negative lens L122, but the present invention is not limited thereto. The positive lens L121 may be disposed between the third lens L13 and the negative lens L122.

[0306] In some embodiments, Fig.16a and Fig.16bAs shown, there is an air gap between the positive lens L121 and the negative lens L122. Of course, the medium between the positive lens L121 and the negative lens L122 is not limited to air, and can also be other media, such as nitrogen, a glue layer, etc.

[0307] In some embodiments, Fig.16a and Fig.16b As shown, the first front lens group G01 includes a positive lens L011 and a negative lens L012 along the direction from the object side to the image side; the second front lens group G02 includes a positive lens L021 and a negative lens L022 along the direction from the object side to the image side. By using the positive and negative combinations of the focal lengths of the lenses in the second front lens group G02, the positive and negative aberrations can be offset, which is beneficial to improving the imaging quality of the optical lens 10.

[0308] The following is a combination of specific parameters and simulation results. Fig.16a and Fig.16b The optical lens 10 shown in FIG. 1 is specifically described.

[0309] As shown in Tables 2.1 to 2.4, Table 2.2 shows the main parameters of the optical lens 10 in the eighth embodiment of the present application when it is in a short-focus state, and Table 2.3 shows the main parameters of the optical lens 10 in the eighth embodiment of the present application when it is in a long-focus state; Table 2.3 shows the aspheric coefficients of the surfaces of the optical elements when the optical lens 10 in the eighth embodiment of the present application is in a short-focus state; Table 2.4 shows the aspheric coefficients of the surfaces of the optical elements when the optical lens 10 in the eighth embodiment of the present application is in a long-focus state.

[0310] Table 2.1 Main parameters of the optical lens 10 in the eighth embodiment of the present application when in a short-focus state

[0311]

[0312] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm. The curvature radius of INF means that the surface corresponding to the parameter is a plane and the curvature radius is infinite.

[0313] S1 represents the object side surface of the positive lens L011, S2 represents the image side surface of the positive lens L011, S3 represents the object side surface of the negative lens L012, S4 represents the image side surface of the negative lens L012, PRISM1 represents the first turning element 1, the first turning element 1 is a prism, and has the function of refracting light; S5 represents the first light incident surface 11 of the first turning element 1, S6 represents the first light exit surface 12 of the first turning element 1; S7 represents the object side surface of the first lens L11, S8 represents the image side surface of the first lens L11. S9 represents the object side surface of the positive lens L121, S10 represents the image side surface of the positive lens L121. S11 represents the object side surface of the negative lens L122, and S12 represents the image side surface of the negative lens L122. S13 represents the object side surface of the third lens L13, S14 represents the image side surface of the third lens L13, S15 represents the object side surface of the fourth lens L21, S16 represents the image side surface of the fourth lens L21, S17 represents the object side surface of the fifth lens L22, and S18 represents the image side surface of the fifth lens L22. PRISM2 represents the second inflection element 3, which is a prism and has the function of refracting light; S19 represents the prism incident surface 31 of the second inflection element 3; S20 represents the prism exit surface 32 of the second inflection element 3; IRCF represents a filter, which is an infrared filter, S21 is the object side surface of the filter, and S22 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0314] Table 2.2 Main parameters of the optical lens 10 in the eighth embodiment of the present application when in telephoto state

[0315]

[0316] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm. The curvature radius of INF means that the surface corresponding to the parameter is a plane and the curvature radius is infinite.

[0317] S1 represents the object side surface of the positive lens L021, S2 represents the image side surface of the positive lens L021, S3 represents the object side surface of the negative lens L022, S4 represents the image side surface of the negative lens L022, PRISM1 represents the first turning element 1, the first turning element 1 is a prism, and has the function of refracting light; S5 represents the first light incident surface 11 of the first turning element 1, S6 represents the first light exit surface 12 of the first turning element 1; S7 represents the object side surface of the first lens L11, S8 represents the image side surface of the first lens L11. S9 represents the object side surface of the positive lens L121, S10 represents the image side surface of the positive lens L121. S11 represents the object side surface of the negative lens L122, and S12 represents the image side surface of the negative lens L122. S13 represents the object side surface of the third lens L13, S14 represents the image side surface of the third lens L13, S15 represents the object side surface of the fourth lens L21, S16 represents the image side surface of the fourth lens L21, S17 represents the object side surface of the fifth lens L22, and S18 represents the image side surface of the fifth lens L22. PRISM2 represents the second inflection element 3, which is a prism and has the function of refracting light; S19 represents the prism incident surface 31 of the second inflection element 3; S20 represents the prism exit surface 32 of the second inflection element 3; IRCF represents a filter, which is an infrared filter, S21 is the object side surface of the filter, and S22 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0318] Table 2.3 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the eighth embodiment of the present application is in a short focal state

[0319]

[0320]

[0321] Table 2.4 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the eighth embodiment of the present application is in the telephoto state

[0322]

[0323]

[0324] As shown in Table 2.5, Table 2.6 and Table 2.7, Table 2.5 shows the basic parameters of the optical path of the optical lens 10 in the eighth embodiment of the present application when it is in the short focus state, Table 2.6 shows the basic parameters of the optical path of the optical lens 10 in the eighth embodiment of the present application when it is in the long focus state, and Table 2.7 shows the relevant parameters and ξ values ​​of the optical lens 10 in the eighth embodiment of the present application;

[0325] Table 2.5 Basic parameters of the optical path when the optical lens 10 is in the short focus state in the eighth embodiment of the present application

[0326] parameter Ih <![CDATA[F 1 ]]> F / # <![CDATA[f L011 ]]> <![CDATA[f L012 ]]> <![CDATA[f L11 ]]> <![CDATA[f L121 ]]> <![CDATA[f L122 ]]> <![CDATA[f L13 ]]> <![CDATA[f L21 ]]> <![CDATA[f L22 ]]> Numeric 6.000 22.9531 2.42 31.547 -219.945 28.655 -16.769 36.161 14.189 -31.394 -22.240 unit mm mm mm mm mm mm mm mm mm mm mm

[0327] Table 2.6 Basic parameters of the optical path when the optical lens 10 is in the telephoto state in the eighth embodiment of the present application

[0328] parameter Ih <![CDATA[F 2 ]]> F / # <![CDATA[f L021 ]]> <![CDATA[f L022 ]]> <![CDATA[f L11 ]]> <![CDATA[f L121 ]]> <![CDATA[f L122 ]]> <![CDATA[f L13 ]]> <![CDATA[f L21 ]]> <![CDATA[f L22 ]]> Numeric 3.000 33.0574 3.46 39.164 -337.319 28.655 -16.769 36.161 14.189 -31.394 -22.240 unit mm mm mm mm mm mm mm mm mm mm mm

[0329] Table 2.7 Related parameters and ξ values ​​of the optical lens 10 in the eighth embodiment of the present application; wherein the object distance is INIFINITY (infinity)

[0330]

[0331] In Tables 2.5 to 2.7, F 1 is the first effective focal length of the optical lens 10; F 2 is the second effective focal length of the optical lens 10; f L011 is the focal length of the positive lens L011; f L012 is the focal length of the negative lens L012; f L021 is the focal length of the positive lens L021; f L022 is the focal length of the negative lens L022; f L11 is the focal length of the first lens L11, f L12 is the focal length of the second lens L12, f L13 is the focal length of the third lens L13, f L21 is the focal length of the fourth lens L21, f L221 is the focal length of the positive lens L221, f L222 is the focal length of negative lens L222, f g01 is the effective focal length of the first front lens group G01, f g02 is the effective focal length of the second front lens group G02, f g1 is the effective focal length of the first rear lens group G1, f g2 is the effective focal length of the second rear lens group G2, f g011 is the combined focal length of the first front lens group G01 and the first rear lens group G1, f g021 is the combined focal length of the second front lens group G02 and the first rear lens group G1, β 1 is the first focal length distribution ratio, β 1 =f g011 / f g01 , β 2 is the second focal length distribution ratio, β 2 =f g021 / f g02 , α 1 is the third focal length distribution ratio, α1 =F 1 / f g011 ; α 2 is the fourth focal length distribution ratio, α 2 =F 2 / f g021 ξ 1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short focal state, ξ 2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the telephoto state; L is the moving stroke of the first turning element 1 between the first position and the second position; coefficient k=[(β 1 -1) 2 / β 1 ]-[(β 2 -1) 2 / β 2 ].

[0332] Fig.16c axial spherical aberration curve, field curvature curve and distortion curve of the optical lens 10 in the eighth embodiment of the present application when in a short focal state, Fig.16d axial spherical aberration curve, field curvature curve, and distortion curve of the optical lens 10 in the eighth embodiment of the present application when in a telephoto state; Fig.16c and Fig.16d The graph shows axial spherical aberration curves, field curvature curves and distortion curves corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0333] The axial spherical aberration curve in the figure is used to illustrate the deviation of light of corresponding wavelength emitted in a 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.16c and Fig.16d The deviation values ​​are all small, and the axial spherical aberration of the optical lens is better corrected.

[0334] The field curvature curve in the figure 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 beam, y is the meridian beam, the abscissa is the deviation value along the optical axis, and the ordinate 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.16c and Fig.16d The field curvature in both directions is small, and the system has a good depth of focus.

[0335] The distortion curve in the figure is used to illustrate the relative deviation between the convergence point of the light beam in different fields of view (actual image height) and the ideal image height. Fig.16c and Fig.16dThe deviation shown is small, ensuring that there is no noticeable distortion in the image.

[0336] Therefore, the optical lens 10 in the eighth embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and gap design, etc.

[0337] Fig.17a : is a schematic structural diagram of the optical lens 10 in the ninth embodiment of the present application when it is in a short-focus state. Fig.17b Schematic diagram of the structure of the optical lens 10 in the ninth embodiment of the present application when it is in a telephoto state. Fig.17a and Fig.17b The optical paths of the first turning element 1 and the second turning element 3 are both expanded and replaced by parallel plates. Fig.17a , Fig.17b The optical lens 10 shown is Fig.15a , Fig.15b The main differences between the optical lenses 10 shown are: the specific parameters of the optical lenses 10 are different;

[0338] The following is a combination of specific parameters and simulation results. Fig.17a and Fig.17b The optical lens 10 shown in FIG. 1 is specifically described.

[0339] As shown in Tables 3.1 to 3.4, Table 3.1 shows the main parameters of the optical lens 10 in the ninth embodiment of the present application when it is in a short-focus state, and Table 3.2 shows the main parameters of the optical lens 10 in the ninth embodiment of the present application when it is in a long-focus state; Table 3.3 shows the aspheric coefficients of the surfaces of the optical elements when the optical lens 10 in the ninth embodiment of the present application is in a short-focus state; Table 3.4 shows the aspheric coefficients of the surfaces of the optical elements when the optical lens 10 in the ninth embodiment of the present application is in a long-focus state.

[0340] Table 3.1 Main parameters of the optical lens 10 in the ninth embodiment of the present application when in a short-focus state

[0341]

[0342] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm. The curvature radius of INF means that the surface corresponding to the parameter is a plane and the curvature radius is infinite.

[0343] S1 represents the object side surface of the positive lens L011, S2 represents the image side surface of the positive lens L011, S3 represents the object side surface of the negative lens L012, S4 represents the image side surface of the negative lens L012, PRISM1 represents the first turning element 1, the first turning element 1 is a prism, and has the function of refracting light; S5 represents the first light incident surface 11 of the first turning element 1, S6 represents the first light exit surface 12 of the first turning element 1; S7 represents the object side surface of the first lens L11, S8 represents the image side surface of the first lens L11. S9 represents the object side surface of the positive lens L121, S10 represents the image side surface of the positive lens L121. S11 represents the object side surface of the negative lens L122, and S12 represents the image side surface of the negative lens L122. S13 represents the object side surface of the third lens L13, S14 represents the image side surface of the third lens L13, S15 represents the object side surface of the fourth lens L21, S16 represents the image side surface of the fourth lens L21, S17 represents the object side surface of the fifth lens L22, and S18 represents the image side surface of the fifth lens L22. PRISM2 represents the second inflection element 3, which is a prism and has the function of refracting light; S19 represents the prism incident surface 31 of the second inflection element 3; S20 represents the prism exit surface 32 of the second inflection element 3; IRCF represents a filter, which is an infrared filter, S21 is the object side surface of the filter, and S22 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0344] Table 3.2 Main parameters of the optical lens 10 in the ninth embodiment of the present application when in telephoto state

[0345]

[0346] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm. The curvature radius of INF means that the surface corresponding to the parameter is a plane and the curvature radius is infinite.

[0347] S1 represents the object side surface of the positive lens L021, S2 represents the image side surface of the positive lens L021, S3 represents the object side surface of the negative lens L022, S4 represents the image side surface of the negative lens L022, PRISM1 represents the first turning element 1, the first turning element 1 is a prism, and has the function of refracting light; S5 represents the first light incident surface 11 of the first turning element 1, S6 represents the first light exit surface 12 of the first turning element 1; S7 represents the object side surface of the first lens L11, S8 represents the image side surface of the first lens L11. S9 represents the object side surface of the positive lens L121, S10 represents the image side surface of the positive lens L121. S11 represents the object side surface of the negative lens L122, and S12 represents the image side surface of the negative lens L122. S13 represents the object side surface of the third lens L13, S14 represents the image side surface of the third lens L13, S15 represents the object side surface of the fourth lens L21, S16 represents the image side surface of the fourth lens L21, S17 represents the object side surface of the fifth lens L22, and S18 represents the image side surface of the fifth lens L22. PRISM2 represents the second inflection element 3, which is a prism and has the function of refracting light; S19 represents the prism incident surface 31 of the second inflection element 3; S20 represents the prism exit surface 32 of the second inflection element 3; IRCF represents a filter, which is an infrared filter, S21 is the object side surface of the filter, and S22 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0348] Table 3.3 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the ninth embodiment of the present application is in a short focal state

[0349]

[0350]

[0351] Table 3.4 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the ninth embodiment of the present application is in the telephoto state

[0352]

[0353]

[0354] Table 3.5 Basic parameters of the optical path of the optical lens 10 in the ninth embodiment of the present application in the short-focus state

[0355] parameter Ih <![CDATA[F 1 ]]> F / # <![CDATA[f L011 ]]> <![CDATA[f L012 ]]> <![CDATA[f L1 ]]> <![CDATA[f L121 ]]> <![CDATA[f L122 ]]> <![CDATA[f L13 ]]> <![CDATA[f L21 ]]> <![CDATA[f L22 ]]> Numeric 5.120 19.661 2.17 27.338 -159.450 29.999 -17.424 38.032 13.110 -32.994 -19.599 unit mm mm mm mm mm mm mm mm mm mm mm

[0356] Table 3.6 Basic parameters of the optical path in the ninth embodiment of the present application when the optical lens 10 is in the telephoto state

[0357] parameter Ih <![CDATA[F 2 ]]> F / # <![CDATA[f L021 ]]> <![CDATA[f L022 ]]> <![CDATA[f L11 ]]> <![CDATA[f L121 ]]> <![CDATA[f L122 ]]> <![CDATA[f L13 ]]> <![CDATA[f L21 ]]> <![CDATA[f L22 ]]> Numeric 2.567 30.720 3.76 35.103 -241.286 29.999 -17.424 38.032 13.110 -32.994 -19.599 unit mm mm mm mm mm mm mm mm mm mm mm

[0358] Table 3.7 Related parameters and ξ values ​​of the optical lens 10 in the ninth embodiment of the present application; wherein the object distance is INIFINITY (infinity)

[0359]

[0360] In Tables 3.5 to 3.7, F 1 is the first effective focal length of the optical lens 10; F 2 is the second effective focal length of the optical lens 10; f L011 is the focal length of the positive lens L011; f L012 is the focal length of the negative lens L012; f L021 is the focal length of the positive lens L021; f L022 is the focal length of the negative lens L022; f L11 is the focal length of the first lens L11, f L12 is the focal length of the second lens L12, f L13 is the focal length of the third lens L13, f L21 is the focal length of the fourth lens L21, f L221 is the focal length of the positive lens L221, f L222 is the focal length of negative lens L222, f g01 is the effective focal length of the first front lens group G01, f g02 is the effective focal length of the second front lens group G02, f g1 is the effective focal length of the first rear lens group G1, f g2 is the effective focal length of the second rear lens group G2, f g011 is the combined focal length of the first front lens group G01 and the first rear lens group G1, f g021 is the combined focal length of the second front lens group G02 and the first rear lens group G1, β 1 is the first focal length distribution ratio, β 1 =f g011 / f g01 , β 2 is the second focal length distribution ratio, β 2 =f g021 / f g02 , α 1 is the third focal length distribution ratio, α 1 =F 1 / f g011 ; α 2 is the fourth focal length distribution ratio, α 2 =F 2 / f g021 ξ 1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short focal state, ξ 2is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the telephoto state; L is the moving stroke of the first turning element 1 between the first position and the second position; coefficient k=[(β 1 -1) 2 / β 1 ]-[(β 2 -1) 2 / β 2 ].

[0361] Fig.17c is the axial spherical aberration curve of the optical lens 10 in the ninth embodiment of the present application when it is in a short focal state, Fig.17d 1 is a field curvature curve and a distortion curve of the optical lens 10 in the ninth embodiment of the present application when it is in a short-focus state; Fig.17e is the axial spherical aberration curve of the optical lens 10 in the ninth embodiment of the present application when in a telephoto state, Fig.17f 1 and 2 are the field curvature curve and distortion curve of the optical lens 10 in the ninth embodiment of the present application when it is in a telephoto state. Figure 17c to Figure 17f The graph shows axial spherical aberration curves, field curvature curves and distortion curves corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0362] The axial spherical aberration curve in the figure is used to illustrate the deviation of light of corresponding wavelength emitted in a 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.17c and Fig.17e The deviation values ​​are all small, and the axial spherical aberration of the optical lens is better corrected.

[0363] The field curvature curve in the figure 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 beam, y is the meridian beam, the abscissa is the deviation value along the optical axis, and the ordinate 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.17d and Fig.17f The field curvature in both directions is small, and the system has a good depth of focus.

[0364] The distortion curve in the figure is used to illustrate the relative deviation between the convergence point of the light beam in different fields of view (actual image height) and the ideal image height. Fig.17d and Fig.17f The deviation shown is small, ensuring that there is no noticeable distortion in the image.

[0365] Therefore, the optical lens 10 in the ninth embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and gap design, etc.

[0366] Fig.18a Schematic diagram of the structure of the optical lens 10 in the tenth embodiment of the present application when it is in a short-focus state. Fig.18b Schematic diagram of the structure of the optical lens 10 in the tenth embodiment of the present application when it is in a telephoto state. Fig.18a and Fig.18b The optical paths of the first turning element 1 and the second turning element 3 are both expanded and replaced by parallel plates. Fig.18a , Fig.18b The optical lens 10 shown is Fig.15a , Fig.15b The main differences between the optical lenses 10 shown are: the specific parameters of the optical lenses 10 are different;

[0367] The following is a combination of specific parameters and simulation results. Fig.18a and Fig.18b The optical lens 10 shown in FIG. 1 is specifically described.

[0368] Table 4.1 Main parameters of the optical lens 10 in the tenth embodiment of the present application when in a short-focus state

[0369]

[0370] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm. The curvature radius of INF means that the surface corresponding to the parameter is a plane and the curvature radius is infinite.

[0371] S1 represents the object side surface of the positive lens L011, S2 represents the image side surface of the positive lens L011, S3 represents the object side surface of the negative lens L012, S4 represents the image side surface of the negative lens L012, PRISM1 represents the first turning element 1, the first turning element 1 is a prism, and has the function of refracting light; S5 represents the first light incident surface 11 of the first turning element 1, S6 represents the first light exit surface 12 of the first turning element 1; S7 represents the object side surface of the first lens L11, S8 represents the image side surface of the first lens L11. S9 represents the object side surface of the positive lens L121, S10 represents the image side surface of the positive lens L121. S11 represents the object side surface of the negative lens L122, and S12 represents the image side surface of the negative lens L122. S13 represents the object side surface of the third lens L13, S14 represents the image side surface of the third lens L13, S15 represents the object side surface of the fourth lens L21, S16 represents the image side surface of the fourth lens L21, S17 represents the object side surface of the fifth lens L22, and S18 represents the image side surface of the fifth lens L22. PRISM2 represents the second inflection element 3, which is a prism and has the function of refracting light; S19 represents the prism incident surface 31 of the second inflection element 3; S20 represents the prism exit surface 32 of the second inflection element 3; IRCF represents a filter, which is an infrared filter, S21 is the object side surface of the filter, and S22 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0372] Table 4.2 Main parameters of the optical lens 10 in the tenth embodiment of the present application when in telephoto state

[0373]

[0374]

[0375] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm. The curvature radius of INF means that the surface corresponding to the parameter is a plane and the curvature radius is infinite.

[0376] S1 represents the object side surface of the positive lens L021, S2 represents the image side surface of the positive lens L021, S3 represents the object side surface of the negative lens L022, S4 represents the image side surface of the negative lens L022, PRISM1 represents the first turning element 1, the first turning element 1 is a prism, and has the function of refracting light; S5 represents the first light incident surface 11 of the first turning element 1, S6 represents the first light exit surface 12 of the first turning element 1; S7 represents the object side surface of the first lens L11, S8 represents the image side surface of the first lens L11. S9 represents the object side surface of the positive lens L121, S10 represents the image side surface of the positive lens L121. S11 represents the object side surface of the negative lens L122, and S12 represents the image side surface of the negative lens L122. S13 represents the object side surface of the third lens L13, S14 represents the image side surface of the third lens L13, S15 represents the object side surface of the fourth lens L21, S16 represents the image side surface of the fourth lens L21, S17 represents the object side surface of the fifth lens L22, and S18 represents the image side surface of the fifth lens L22. PRISM2 represents the second inflection element 3, which is a prism and has the function of refracting light; S19 represents the prism incident surface 31 of the second inflection element 3; S20 represents the prism exit surface 32 of the second inflection element 3; IRCF represents a filter, which is an infrared filter, S21 is the object side surface of the filter, and S22 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0377] Table 4.3 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the tenth embodiment of the present application is in a short focal state

[0378]

[0379]

[0380] Table 4.4 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the tenth embodiment of the present application is in the telephoto state

[0381]

[0382]

[0383] As shown in Table 4.5, Table 4.6 and Table 4.7, Table 4.5 shows the basic parameters of the optical path of the optical lens 10 in the short focus state in the tenth embodiment of the present application, Table 4.6 shows the basic parameters of the optical path of the optical lens 10 in the long focus state in the tenth embodiment of the present application, and Table 4.7 shows the relevant parameters and ξ values ​​of the optical lens 10 in the tenth embodiment of the present application;

[0384] Table 4.5 Basic parameters of the optical path in the tenth embodiment of the present application when the optical lens 10 is in the short focus state

[0385] parameter Ih <![CDATA[F 1 ]]> F / # <![CDATA[f L011 ]]> <![CDATA[f L012 ]]> <![CDATA[f L11 ]]> <![CDATA[f L121 ]]> <![CDATA[f L122 ]]> <![CDATA[f L3 ]]> <![CDATA[f L21 ]]> <![CDATA[f L22 ]]> Numeric 8.166 31.361 2.17 43.608 -254.310 47.854 -27.790 60.659 20.910 -52.622 -31.260 unit mm mm mm mm mm mm mm mm mm mm mm

[0386] Table 4.6 Basic parameters of the optical path in the tenth embodiment of the present application when the optical lens 10 is in the telephoto state

[0387] parameter Ih <![CDATA[F 2 ]]> F / # <![CDATA[f L021 ]]> <![CDATA[f L022 ]]> <![CDATA[f L11 ]]> <![CDATA[f L121 ]]> <![CDATA[f L122 ]]> <![CDATA[f L13 ]]> <![CDATA[f L21 ]]> <![CDATA[f L22 ]]> Numeric 4.094 49.002 3.76 55.995 -384.832 47.854 -27.790 60.659 20.910 -52.622 -31.260 unit mm mm mm mm mm mm mm mm mm mm mm

[0388] Table 4.7 Related parameters and ξ values ​​of the optical lens 10 in the tenth embodiment of the present application; wherein the object distance is INIFINITY (infinity)

[0389]

[0390] In Tables 4.5 to 4.7, F 1 is the first effective focal length of the optical lens 10; F 2 is the second effective focal length of the optical lens 10; f L011 is the focal length of the positive lens L011; f L012 is the focal length of the negative lens L012; f L021 is the focal length of the positive lens L021; f L022 is the focal length of the negative lens L022; f L11 is the focal length of the first lens L11, f L12 is the focal length of the second lens L12, f L13 is the focal length of the third lens L13, f L21 is the focal length of the fourth lens L21, f L221 is the focal length of the positive lens L221, f L222 is the focal length of negative lens L222, f g01 is the effective focal length of the first front lens group G01, f g02 is the effective focal length of the second front lens group G02, f g1 is the effective focal length of the first rear lens group G1, f g2 is the effective focal length of the second rear lens group G2, f g011 is the combined focal length of the first front lens group G01 and the first rear lens group G1, f g021 is the combined focal length of the second front lens group G02 and the first rear lens group G1, β 1 is the first focal length distribution ratio, β 1 =f g011 / f g01 , β 2 is the second focal length distribution ratio, β 2 =f g021 / f g02 , α 1 is the third focal length distribution ratio, α1 =F 1 / f g011 ; α 2 is the fourth focal length distribution ratio, α 2 =F 2 / f g021 ξ 1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short focal state, ξ 2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the telephoto state; L is the moving stroke of the first turning element 1 between the first position and the second position; coefficient k=[(β 1 -1) 2 / β 1 ]-[(β 2 -1) 2 / β 2 ].

[0391] Fig.18c axial spherical aberration curve, field curvature curve and distortion curve of the optical lens 10 in the tenth embodiment of the present application when in a short focal state, Fig.18d axial spherical aberration curve, field curvature curve, and distortion curve of the optical lens 10 in the tenth embodiment of the present application when in a telephoto state; Fig.18c and Fig.18d The graph shows axial spherical aberration curves, field curvature curves and distortion curves corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0392] The axial spherical aberration curve in the figure is used to illustrate the deviation of light of corresponding wavelength emitted in a 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.18c and Fig.18d The deviation values ​​are all small, and the axial spherical aberration of the optical lens is better corrected.

[0393] The field curvature curve in the figure 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 beam, y is the meridian beam, the abscissa is the deviation value along the optical axis, and the ordinate 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.18c and Fig.18d The field curvature in both directions is small, and the system has a good depth of focus.

[0394] The distortion curve in the figure is used to illustrate the relative deviation between the convergence point of the light beam in different fields of view (actual image height) and the ideal image height. Fig.18c and Fig.18dThe deviation shown is small, ensuring that there is no noticeable distortion in the image.

[0395] Therefore, the optical lens 10 in the tenth embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and gap design, etc.

[0396] Fig.19a Schematic diagram of the structure of the optical lens 10 in the eleventh embodiment of the present application when it is in a short-focus state. Fig.19b Schematic diagram of the structure of the optical lens 10 in the eleventh embodiment of the present application when it is in a telephoto state. Fig.19a and Fig.19b The optical paths of the first turning element 1 and the second turning element 3 are both expanded and replaced by parallel plates. Fig.19a , Fig.19b The optical lens 10 shown is Fig.15a , Fig.15b The main difference between the optical lens 10 shown in FIG. 1 and the optical lens 10 shown in FIG. 1 is that the configuration of the optical power of each lens in the second rear lens group G2 is different, as described in detail as follows:

[0397] like Fig.19a and Fig.19b As shown, the fifth lens L22 includes two negative lenses arranged at intervals, namely, negative lens L221 and negative lens L222. Such an arrangement is equivalent to splitting the fifth lens L22 into negative lens L221 and negative lens L222, which is beneficial to increase the number of lens surfaces in the second rear lens group G2, increase the degree of freedom in the design of the second rear lens group G2, and thus is beneficial to correct the aberration of the optical lens.

[0398] The following is a combination of specific parameters and simulation results. Fig.19a and Fig.19b The optical lens 10 shown in FIG. 1 is specifically described.

[0399] As shown in Tables 5.1 to 5.4, Table 5.1 shows the main parameters of the optical lens 10 in the eleventh embodiment of the present application when it is in a short-focus state, and Table 5.2 shows the main parameters of the optical lens 10 in the eleventh embodiment of the present application when it is in a long-focus state; Table 5.3 shows the aspheric coefficients of the surfaces of the optical elements when the optical lens 10 in the eleventh embodiment of the present application is in a short-focus state; Table 5.4 shows the aspheric coefficients of the surfaces of the optical elements when the optical lens 10 in the eleventh embodiment of the present application is in a long-focus state.

[0400] Table 5.1 Main parameters of the optical lens 10 in the eleventh embodiment of the present application when in a short-focus state

[0401]

[0402] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm.

[0403] 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 of the positive lens L01; S2 represents the object side surface of the positive lens L011, and S3 represents the image side surface of the positive lens L011. PRISM1 represents the first turning element 1, which is a prism and has the function of refracting light; S4 represents the first light incident surface 11 of the first turning element 1, and S6 represents the first light exit surface 12 of the first turning element 1; S7 represents the object side surface of the first lens L11, and S8 represents the image side surface of the first lens L11. S9 represents the object side surface of the second lens L12, and S10 represents the image side surface of the second lens L12. S11 represents the object side surface of the third lens L13, and S12 represents the image side surface of the third lens L13. S13 represents the object side surface of the fourth lens L21, and S14 represents the image side surface of the fourth lens L21. S15 represents the object side surface of the negative lens L221, and S16 represents the image side surface of the negative lens L221. S17 represents the object side surface of the negative lens L222, and S18 represents the image side surface of the negative lens L222. PRISM2 represents the second turning element 3, which is a prism and has the function of refraction of light; S19 represents the prism incident surface 31 of the second turning element 3; S20 represents the prism exit surface 32 of the second turning element 3; IRCF represents a filter, which is an infrared filter, S21 is the object side surface of the filter, and S22 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0404] Table 5.2 Main parameters of the optical lens 10 in the eleventh embodiment of the present application when in the telephoto state

[0405]

[0406]

[0407] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm.

[0408] 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 of the positive lens L01; S2 represents the object side surface of the positive lens L021, and S3 represents the image side surface of the positive lens L021; S4 represents the object side surface of the negative lens L022, and S5 represents the image side surface of the negative lens L022; PRISM1 represents the first turning element 1, which is a prism and has the function of refracting light; S6 represents the first light incident surface 11 of the first turning element 1, and S7 represents the first light exit surface 12 of the first turning element 1; 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 second lens L12, and S11 represents the image side surface of the second lens L12. S12 represents the object side surface of the third lens L13, and S13 represents the image side surface of the third lens L13. S14 represents the object side surface of the fourth lens L21, and S15 represents the image side surface of the fourth lens L21. S16 represents the object side surface of the negative lens L221, and S17 represents the image side surface of the negative lens L221. S18 represents the object side surface of the negative lens L222, and S19 represents the image side surface of the negative lens L222. PRISM2 represents the second turning element 3, which is a prism and has the function of refracting light; S20 represents the prism incident surface 31 of the second turning element 3; S21 represents the prism exit surface 32 of the second turning element 3; IRCF represents a filter, which is an infrared filter, S22 is the object side surface of the filter, and S23 is the image side surface of the filter; IMA represents the image plane IMAGE, which can be the photosensitive surface of the photosensitive element.

[0409] Table 5.3 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the eleventh embodiment of the present application is in a short focal state

[0410]

[0411]

[0412]

[0413] Table 5.4 Aspheric coefficients of various surfaces of the optical element when the optical lens 10 in the eleventh embodiment of the present application is in the telephoto state

[0414]

[0415]

[0416] As shown in Tables 5.5, 5.6 and 5.7, Table 5.5 shows the basic parameters of the light path when the optical lens 10 in the eleventh embodiment of the present application is in a short-focus state, Table 5.6 shows the basic parameters of the light path when the optical lens 10 in the eleventh embodiment of the present application is in a long-focus state, and Table 5.7 shows the relevant parameters and ξ values ​​of the optical lens 10 in the eleventh embodiment of the present application.

[0417] Table 5.5 Basic parameters of the optical path when the optical lens 10 in the eleventh embodiment of the present application is in the short-focus state

[0418] parameter Ih <![CDATA[F 1 ]]> F / # <![CDATA[f L01 ]]> <![CDATA[f L11 ]]> <![CDATA[f L12 ]]> <![CDATA[f L13 ]]> <![CDATA[f L21 ]]> <![CDATA[f L221 ]]> <![CDATA[f L222 ]]> Numeric 5.80 22.859 1.92 30.793 33.088 -20.714 11.788 -27.630 -178.074 -38.736 unit mm mm mm mm mm mm mm mm mm mm

[0419] Table 5.6 Basic parameters of the optical path when the optical lens 10 in the eleventh embodiment of the present application is in the telephoto state

[0420]

[0421] Table 5.7 Related parameters and ξ values ​​of the optical lens 10 in the eleventh embodiment of the present application; wherein the object distance is INIFINITY (infinity)

[0422]

[0423] In Tables 5.5 to 5.7, F 1 is the first effective focal length of the optical lens 10; F 2 is the second effective focal length of the optical lens 10; f L011 is the focal length of the positive lens L011; f L021 is the focal length of the positive lens L021; f L022 is the focal length of the negative lens L022; f L11 is the focal length of the first lens L11, f L12 is the focal length of the second lens L12, f L13 is the focal length of the third lens L13, f L21 is the focal length of the fourth lens L21, f L221 is the focal length of the negative lens L221, f L222 is the focal length of negative lens L222, f g01 is the effective focal length of the first front lens group G01, f g02 is the effective focal length of the second front lens group G02, f g1 is the effective focal length of the first rear lens group G1, f g2 is the effective focal length of the second rear lens group G2, f g011 is the combined focal length of the first front lens group G01 and the first rear lens group G1, f g021 β is the combined focal length of the second front lens group G02 and the first rear lens group G1; 1 is the first focal length distribution ratio, β2 is the second focal length distribution ratio, α 1 is the third focal length distribution ratio, α 1 =F 1 / f g011 ; α 2 is the fourth focal length distribution ratio, α 2 =F 2 / f g021 ξ 1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short focal state, ξ 2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the telephoto state; L is the moving stroke of the first turning element 1 between the first position and the second position; coefficient k=[(β 1 -1) 2 / β 1 ]-[(β 2 -1) 2 / β 2 ].

[0424] Fig.19c axial spherical aberration curve, field curvature curve and distortion curve of the optical lens 10 in the eleventh embodiment of the present application when in a short focal state, Fig.19d axial spherical aberration curve, field curvature curve, and distortion curve of the optical lens 10 in the eleventh embodiment of the present application when in a telephoto state; Fig.19c and Fig.19d The graph shows axial spherical aberration curves, field curvature curves and distortion curves corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm).

[0425] The axial spherical aberration curve in the figure is used to illustrate the deviation of light of corresponding wavelength emitted in a 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.19c and Fig.19d The deviation values ​​are all small, and the axial spherical aberration of the optical lens is better corrected.

[0426] The field curvature curve in the figure 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 beam, y is the meridian beam, the abscissa is the deviation value along the optical axis, and the ordinate 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.19c and Fig.19d The field curvature in both directions is small, and the system has a good depth of focus.

[0427] The distortion curve in the figure is used to illustrate the relative deviation between the convergence point of the light beam in different fields of view (actual image height) and the ideal image height. Fig.19c and Fig.19d The deviation shown is small, ensuring that there is no noticeable distortion in the image.

[0428] Therefore, the optical lens 10 in the eleventh embodiment of the present application achieves lower light aberration control and obtains clear image quality through reasonable surface shape and gap design, etc.

[0429] 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.

[0430] 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.

[0431] 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.

[0432] 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.

[0433] 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.

[0434] 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.

[0435] 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: It comprises a front lens group (G0), a first turning element (1), a first rear lens group (G1) and a second rear lens group (G2) arranged in a direction from the object side to the image side; The front lens group (G0) comprises a first front lens group (G01) and a second front lens group (G02) arranged along a first direction (X), the first direction (X) being parallel to the optical axis of the first rear lens group (G1); the first turning element (1) is movable along the first direction (X) between a first position and a second position; When the first turning element (1) is located at the first position, the first turning element (1) is located at the image side of the first front lens group (G01), the first turning element (1) is used to reflect the outgoing light beam of the first front lens group (G01) to the first rear lens group (G1), and the optical lens has a first effective focal length F1; When the first turning element (1) is located at the second position, the first turning element (1) is located at the image side of the second front lens group (G02), the first turning element (1) is used to reflect the outgoing light beam of the second front lens group (G02) to the first rear lens group (G1), the optical lens has a second effective focal length F2, the second effective focal length F2 is greater than the first effective focal length F1, and the moving stroke L of the first turning element (1) between the first position and the second position satisfies: L≤23mm.

2. The optical lens according to claim 1, characterized in that: When the first turning element (1) is located at the first position, the total length of the optical system formed by the first front lens group (G01), the first turning element (1), the first rear lens group (G1) and the second rear lens group (G2) is TTL1; When the first turning element (1) is located at the second position, the total length of the optical system formed by the second front lens group (G02), the first turning element (1), the first rear lens group (G1) and the second rear lens group (G2) is TTL2; When the first turning element (1) moves between the first position and the second position, the image plane position of the optical lens remains unchanged; TTL1 and TTL2 satisfy: TTL2-TTL1≤23mm.

3. The optical lens according to claim 2, characterized in that: The effective focal length f of the first front lens group (G01) is g01 , the effective focal length f of the second front lens group (G02) g02 and the effective focal length f of the first rear lens group (G1) g1 satisfy: TTL2-TTL1=|f g02 -f g01 +k·f g1 |; where k satisfies: 0≤|k|<1.

4. The optical lens according to claim 3, characterized in that: The effective focal length f of the first front lens group (G01) is g01 , the effective focal length f of the second front lens group (G02) g02 , the combined focal length f of the first front lens group (G01) and the first rear lens group (G1) g011 , the combined focal length f of the second front lens group (G02) and the first rear lens group (G1) g021 satisfy: k=[(β1-1) 2 / β1]-[(β2-1) 2 / β2];β1=f g011 / f g01 ;β2=f g021 / f g02 。 5. The optical lens according to claim 3 or 4, characterized in that: k satisfies: 0.28≤k≤0.46; or 0≤k≤0.

005.

6. The optical lens according to any one of claims 2 to 5, characterized in that: TTL1 and TTL2 satisfy: TTL2-TTL1≥8.1mm.

7. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length f of the first front lens group (G01) is g01 The effective focal length f of the second front lens group (G02) is g02 satisfy: 4.5mm≤|f g02 -f g01 |≤12.9mm。 8. The optical lens according to any one of claims 1 to 7, characterized in that: The effective focal length f of the second front lens group (G02) is g02 Greater than the effective focal length f of the first front lens group (G01) g01 .

9. The optical lens according to any one of claims 1 to 8, characterized in that: A shading device (2) is provided on the object side of the first turning element (1); when the first turning element (1) is located at the first position, the shading device (2) is used to block the light beam directed toward the image side of the second front lens group (G02); when the first turning element (1) is located at the second position, the shading device (2) is used to block the light beam directed toward the image side of the first front lens group (G01).

10. The optical lens according to claim 9, characterized in that: The shading device (2) comprises a first variable aperture diaphragm (21) and a second variable aperture diaphragm (22); The first variable aperture diaphragm (21) is arranged on the object side or the image side of the first front lens group (G01), or is arranged between the lenses of the first front lens group (G01); The second variable aperture stop (22) is arranged on the object side or the image side of the second front lens group (G02), or is arranged between the lenses of the second front lens group (G02).

11. The optical lens according to claim 9, characterized in that: The shading device (2) comprises a shielding plate (23); The shielding plate (23) is arranged on the image side of the front lens group (G0) and can move relative to the front lens group (G0); when the first turning element (1) is located at the first position, the shielding plate (23) moves to the image side of the second front lens group (G02); when the first turning element (1) is located at the second position, the shielding plate (23) moves to the image side of the first front lens group (G01); Alternatively, the baffle plate (23) is arranged on the object side of the front lens group (G0) and can be moved relative to the front lens group (G0); when the first turning element (1) is located at the first position, the baffle plate (23) moves to the object side of the second front lens group (G02); when the first turning element (1) is located at the second position, the baffle plate (23) moves to the object side of the first front lens group (G01).

12. The optical lens according to any one of claims 1 to 11, characterized in that: The first rear lens group (G1) is a movable lens group and can be moved relative to the front lens group (G0) along the first direction (X); the second rear lens group (G2) is a fixed lens group and is fixed relative to the front lens group (G0) along the first direction (X).

13. The optical lens according to claim 12, characterized in that: When the first turning element (1) is located at the first position, the effective focal length f of the first front lens group (G01) is g01 , the combined focal length f of the first front lens group (G01) and the first rear lens group (G1) g011 The first effective focal length F1 satisfies: ξ1=[1-β1 2 ]α1 2 , β1=f g011 / f g01 , α1=F1 / f g011 , and 0<ξ1≤3; When the first turning element (1) is located at the second position, the effective focal length f of the second front lens group (G02) is g02 , the combined focal length f of the second front lens group (G02) and the first rear lens group (G1) g021 The second effective focal length F2 satisfies: ξ2=[1-β2 2 ]α2 2 , β2=f g021 / f g02 , α2=F2 / f g021 , and 0<ξ2≤3.

14. The optical lens according to claim 12 or 13, characterized in that: The effective focal length f of the first front lens group (G01) is g01 , the combined focal length f of the first front lens group (G01) and the first rear lens group (G1) g011 Satisfies: 0<β1≤0.5; where β1=f g011 / f g01 ; The effective focal length f of the second front lens group (G02) is g02 , the combined focal length f of the second front lens group (G02) and the first rear lens group (G1) g021 Satisfies: 0<β2≤0.5; where β2=f g021 / f g02 .

15. The optical lens according to claim 12 or 13, characterized in that: The effective focal length f of the first front lens group (G01) is g01 , the combined focal length f of the first front lens group (G01) and the first rear lens group (G1) g011 Satisfies: 0.75≤1-β1 2 <1; where β1=f g011 / f g01 ; The effective focal length f of the second front lens group (G02) is g02 , the combined focal length f of the second front lens group (G02) and the first rear lens group (G1) g021 Satisfies: 0.75≤1-β2 2 <1; where β2=f g021 / f g02 .

16. The optical lens according to any one of claims 12 to 15, characterized in that: The combined focal length f of the first front lens group (G01) and the first rear lens group (G1) is g011 The first effective focal length F1 satisfies: 0<α1≤2; wherein, α1=F1 / f g011 ; The combined focal length f of the second front lens group (G02) and the first rear lens group (G1) is g021 The second effective focal length F2 satisfies: 0<α2≤2; wherein, α2=F2 / f g021 .

17. The optical lens according to any one of claims 1 to 16, characterized in that: The optical focal lengths of the first front lens group (G01), the second front lens group (G02), and the first rear lens group (G1) are all positive; the optical focal length of the second rear lens group (G2) is negative.

18. The optical lens according to claim 17, characterized in that: The first front lens group (G01) and the second front lens group (G02) each include at least one positive lens; The first rear lens group (G1) includes a first lens (L11), a second lens (L12) and a third lens (L13) along the direction from the object side to the image side, the first lens (L11) and the third lens (L13) both have positive refractive power, the second lens (L12) has negative refractive power, and there is a gap between two adjacent ones of the first lens (L11), the second lens (L12) and the third lens (L13); The second rear lens group (G2) includes a fourth lens (L21) and a fifth lens (L22) along the direction from the object side to the image side, the fourth lens (L21) has negative optical power or positive optical power, the fifth lens (L22) has negative optical power, and there is a gap between the fourth lens (L21) and the fifth lens (L22).

19. The optical lens according to claim 18, characterized in that: The second lens (L12) includes a positive lens and a negative lens which are arranged apart from each other.

20. The optical lens according to claim 18 or 19, characterized in that: The fifth lens (L22) includes a positive lens and a negative lens that are spaced apart; or, the fifth lens (L22) includes two negative lenses that are spaced apart.

21. The optical lens according to any one of claims 1 to 20, characterized in that: The optical lens further comprises a second turning element (3) arranged on the image side of the second rear lens group (G2); the second turning element (3) is a prism and has a prism incident surface (31) and a prism exit surface (32); the prism incident surface (31) is arranged toward the side where the second rear lens group (G2) is located, and the prism exit surface (32) is arranged toward the side of the image plane of the optical lens; the prism exit surface (32) is arranged to be inclined relative to the optical axis of the second rear lens group (G2).

22. A camera module, characterized in that: The optical lens (10) comprises a photosensitive element (20) and any one of claims 1 to 21, wherein the photosensitive element (20) is arranged on the image side of the optical lens (10).

23. An electronic device, characterized in that: It comprises a shell and the camera module (100) as claimed in claim 22, wherein the camera module (100) is mounted on the shell (200).

Images