Optical lens, camera module and electronic device

Abstract

The present application relates to the technical field of optical lenses. Provided are an optical lens, a camera module and an electronic device, which can solve the problem in the related art of relatively large thickness of an electronic device caused by the large amount of space occupied by a camera module. The optical lens comprises a front lens group, a first deflecting element, a first rear lens group and a second rear lens group, wherein the front lens group comprises a first front lens group and a second front lens group; when the first deflecting element is located at a first position, the first deflecting element is located on an image side of the first front lens group and configured to reflect 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; and when the first deflecting element is located at a second position, the first deflecting element is located on an image side of the second front lens group and is configured to reflect an emergent light beam of the second front lens group to the first rear lens group, and the optical lens has a second effective focal length F2, the second effective focal length being greater than the first effective focal length F1. The present application can be applied to electronic devices such as a mobile phone.

Description

Optical lenses, camera modules and electronic equipment

[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”, and the Chinese patent application filed with the State Intellectual Property Office on June 28, 2024, with application number 202410875013.7 and application name “Optical lens, camera module and electronic device”, all contents of which are incorporated by reference into this application. Technical Field

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

[0003] Camera modules have become a crucial component in electronic devices like mobile phones and tablets. They allow users to easily capture photos, satisfying their photography needs. As electronic devices become increasingly lightweight and thinner, there's a need to achieve high imaging performance while conserving internal space. Therefore, designing camera modules to minimize the space they occupy has become a key challenge within the industry.

[0004] Summary of the Invention

[0005] 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.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In the 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 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, the first direction being parallel to the optical axis of the first rear lens group G1; the first turning element is movable 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 F1; 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, 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 F2, which is greater than the first effective focal length F1.

[0008] In the optical lens of the present embodiment, by moving the first turning element along a first direction, 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. This allows the formation of optical systems with different effective focal lengths, thereby achieving zooming of the optical lens. During the movement of the first turning element along the first direction, no additional space is occupied by the optical lens in the direction of light entry, thereby facilitating a reduction in the space occupied by the camera module in the thickness direction of the electronic device, thereby further contributing to the realization of a thinner and lighter electronic device.

[0009] In some embodiments of the first aspect, a travel distance L of the first turning element between the first position and the second position satisfies the condition L ≤ 23 mm. This configuration prevents the travel distance L of the first turning element from being excessively large, thereby enabling a more compact design of the actuator of the first turning element and thus a more compact structure of the camera module.

[0010] In some embodiments of the first aspect, when the first turning element is in 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 TTL1; 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 TTL2; when the first turning element 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. By reasonably setting the difference in the total length of the first optical system and the second optical system, the movement stroke L of the first turning element can be avoided 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.

[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 and the effective focal length f of the first rear lens group G1 g1 Satisfies: TTL2-TTL1=|f g02 -f g01 +k·f g1 |; wherein k satisfies: 0≤|k|<1. Such an arrangement 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 and helping to reduce the space occupied by the camera module.

[0012] 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 is g011 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 g021 Satisfies: k = [(β1-1) 2 / β1]-[(β2-1) 2 / β2];β1=f g011 / f g01 β2=f g021 / f g02 In this way, by reasonably setting the first focal length distribution ratio β1 and the second focal length distribution ratio β2, the coefficient k can be controlled, and thus the movement stroke L of the first turning element can be controlled.

[0013] In some embodiments of the first aspect, k satisfies: 0.28≤k≤0.46. This configuration can reduce the space occupied by the camera module and help reduce the cost of the camera module.

[0014] 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.

[0015] In some embodiments of the first aspect, k is approximately equal to 0, that is, 0<k≤0.005. In this way, by reasonably 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.

[0016] 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 Satisfy: 4.5mm≤|f g02 -f g01 |≤12.9mm. This configuration can not only reduce the space occupied by the camera module, but also help reduce the cost of the camera module.

[0017] In some embodiments of the first aspect, TTL1 and TTL2 satisfy: TTL2-TTL1≥8.1 mm. This configuration can avoid a small difference in effective focal length between the first optical system and the second optical system, thereby facilitating an improvement in the zoom ratio (or zoom range) of the optical lens.

[0018] 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 helping to improve the zoom performance of the optical lens.

[0019] In some embodiments of the first aspect, a light shielding device is provided on the object side of the first deflection element. When the first deflection element is in a first position, the light shielding device is used to shield light beams directed toward the image side of the second front lens group G02. When the first deflection element is in a second position, the light shielding device is used to shield light beams directed toward the image side of the first front lens group G01. This arrangement can prevent stray light from affecting the imaging quality of the optical lens.

[0020] In some embodiments of the first aspect, the light shielding device includes a first variable aperture diaphragm and a second variable aperture diaphragm, the first variable aperture diaphragm being disposed on the object side or the image side of the first front lens group G01, and the second variable aperture diaphragm being disposed on the object side or the image side of the second front lens group G02. With this arrangement, when the first turning element is in the first position or the second position, the light shielding device can precisely control the amount of light passing through the optical lens, thereby facilitating improved imaging quality of the optical lens.

[0021] In some embodiments of the first aspect, the light shielding device includes a first variable aperture diaphragm and a second variable aperture diaphragm. The first variable aperture diaphragm is disposed between the lenses of the first front lens group G01, and the second variable aperture diaphragm is disposed between the lenses of the second front lens group G02. With this arrangement, when the first turning element is in the first position or the second position, the light shielding device can precisely control the amount of light passing through the optical lens, thereby improving the imaging quality of the optical lens.

[0022] In some embodiments of the first aspect, the light shielding device includes a shielding plate; the shielding plate is disposed on the image side of the front lens group G0 and is movable relative to the front lens group G0. When the first turning element is in a first position, the shielding plate moves to the image side of the second front lens group G02; when the first turning element is in a second position, the shielding plate moves to the image side of the first front lens group G01. This arrangement facilitates simplifying the structure of the light shielding device, thereby facilitating cost reduction of the optical lens.

[0023] In some embodiments of the first aspect, the light shielding device includes a shielding plate; the shielding plate is disposed on the object side of the front lens group G0 and is movable relative to the front lens group G0. When the first turning element is in a first position, the shielding plate moves to the object side of the second front lens group G02; when the first turning element is in a second position, the shielding plate moves to the object side of the first front lens group G01. This arrangement facilitates simplifying the structure of the light shielding device, thereby reducing the cost of the optical lens.

[0024] In some embodiments of the first aspect, the first rear lens group G1 is a movable lens group and is movable along a first direction relative to the front lens group G0, and 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. With this arrangement, when the first turning element is in the first position or the second position, the first rear lens group G1 is movable along the first direction, thereby achieving precise focusing of the image plane IMA.

[0025] 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 、The first effective focal length F1 satisfies: ξ1=[1-β12 ]α1 2 , β1=f g011 / f g01 , α1=F1 / f g011 , and 0<ξ1≤3. This arrangement can not only reduce the focus stroke of the first rear lens group G1, which is beneficial for reducing the size of the focus motor, but also prevent the focus stroke of the first rear lens group G1 from being too short, reducing the precision requirements for the focus motor.

[0026] 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 , 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. This arrangement can not only reduce the focus stroke of the first rear lens group G1, which is beneficial for reducing the size of the focus motor, but also prevent the focus stroke of the first rear lens group G1 from being too short, reducing the precision requirements of the focus motor.

[0027] 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<β1≤0.5; where β1=f g011 / f g01 Such an arrangement can prevent the stroke compression ratio coefficient ξ1 from being too small, which is beneficial to reducing 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 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 Such an arrangement can prevent the stroke compression ratio coefficient ξ2 from being too small, which is beneficial to reducing the focusing stroke of the first rear lens group G1.

[0029] 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-β1 2 <1; where β1 = fg011 / f g01 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, which reduces the precision requirements for the focus motor.

[0030] 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-β2 2 <1; where β2 = 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, which reduces the precision requirements for the focus motor.

[0031] 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 The first effective focal length F1 satisfies: 0<α1≤2; where α1=F1 / f g011 This configuration can prevent the stroke compression ratio coefficient ξ1 from being too large, thereby reducing the precision requirements for the focus motor.

[0032] 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 The second effective focal length F2 satisfies: 0<α2≤2; where α2=F2 / f g021 This configuration prevents the stroke compression ratio coefficient ξ2 from being too large, thereby reducing the precision requirements for the focus motor.

[0033] 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, while the optical power of the second rear lens group G2 is negative. This arrangement can offset some aberrations, thereby facilitating reduction of aberrations in the optical lens.

[0034] 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, along the object side to the image side, a first lens L11, a second lens L12, and a third lens L13; the first lens L11 and the third lens L13 each have positive optical power, the second lens L12 has negative optical power, and a gap is formed between adjacent lenses of the first lens L11, the second lens L12, and the third lens L13; the second rear lens group G2 includes, along the object side to the image side, a fourth lens L21 and a fifth lens L22; the fourth lens L21 has negative optical power or positive optical power, the fifth lens L22 has negative optical power, and a gap is formed between the fourth lens L21 and the fifth lens L22. Such an arrangement is conducive to correcting aberrations of the optical lens.

[0035] 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 aberrations of the optical lens.

[0036] 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 aberrations of the optical lens.

[0037] In some embodiments of the first aspect, the fifth lens L22 includes two negative lenses spaced apart from each other. Such a configuration is beneficial for correcting aberrations of the optical lens.

[0038] 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.

[0039] In some embodiments of the first aspect, the first turning element is a mirror.

[0040] 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 being a prism and having a prism incident surface and a prism exit surface, the prism incident surface being disposed toward the side where the second rear lens group G2 is located, the prism exit surface being disposed toward the side where the image plane of the optical lens is located, and the prism exit surface being 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, thereby facilitating a reduction in the thickness of the electronic device.

[0041] In some embodiments of the first aspect, the optical lens further includes a second turning element disposed on the image side of the second rear lens group G2, the second turning element being a prism and having a prism incident surface and a prism exit surface, the prism incident surface being disposed toward the side where the second rear lens group G2 is located, and the prism exit surface being disposed toward the side where the image plane of the optical lens is located, the angle between the prism incident surface and the prism exit surface being a right angle, and the prism exit surface being parallel to the optical axis of the second rear lens group G2.

[0042] 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 reflective mirror.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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

[0047] Figure 1a is a schematic diagram of the definition of the image side principal surface and image side principal point of an optical system;

[0048] Figure 1b is a schematic diagram of the definition of the object principal plane and object principal point of the optical system;

[0049] Figure 1c is a schematic diagram of the definition of object distance and image distance of an optical system;

[0050] FIG2a 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;

[0051] FIG2 b is a schematic structural diagram of an optical lens of a camera module in the related art in a second state;

[0052] FIG3 is a schematic diagram of the back side of an electronic device (mobile phone) in some embodiments of the present application;

[0053] FIG4 is a cross-sectional view taken along line AA of the electronic device in FIG3 ;

[0054] FIG5 is a schematic structural diagram of the electronic device in FIG4 in another state;

[0055] FIG6 is a schematic structural diagram of the optical lens in the first embodiment of the present application when in a short-focus state;

[0056] FIG7 is a schematic structural diagram of the optical lens in the first embodiment of the present application when in a telephoto state;

[0057] FIG8 is a schematic diagram of the optical lens in the first embodiment of the present application when in a short-focus state and a long-focus state;

[0058] FIG9 is a diagram illustrating the focusing principle of the optical lens in the first embodiment of the present application when in a short-focus state;

[0059] FIG10 is a schematic structural diagram of the optical lens in the second embodiment of the present application when in a telephoto state;

[0060] FIG11 is a schematic structural diagram of the optical lens in the third embodiment of the present application when in a telephoto state;

[0061] FIG12 is a schematic structural diagram of the optical lens in the fourth embodiment of the present application when in a telephoto state;

[0062] FIG13 is a schematic structural diagram of the optical lens in the fourth embodiment of the present application when in a telephoto state;

[0063] FIG14a is a schematic structural diagram of the optical lens in the fifth embodiment of the present application when in a short-focus state;

[0064] FIG14 b is a schematic structural diagram of the optical lens in the fifth embodiment of the present application when in a telephoto state;

[0065] FIG14c is a schematic structural diagram of the optical lens in the sixth embodiment of the present application when in a short-focus state;

[0066] FIG14 d is a schematic structural diagram of the optical lens in the sixth embodiment of the present application when in a telephoto state;

[0067] FIG15 a is a schematic structural diagram of the optical lens in the seventh embodiment of the present application when in a short-focus state;

[0068] FIG15 b is a schematic structural diagram of the optical lens in the seventh embodiment of the present application when in a telephoto state;

[0069] FIG15 c is an axial spherical aberration curve of the optical lens in the seventh embodiment of the present application when in a short-focus state;

[0070] FIG15 d is a field curvature curve and a distortion curve of the optical lens in the seventh embodiment of the present application when in a short-focus state;

[0071] FIG15e is an axial spherical aberration curve of the optical lens in the seventh embodiment of the present application when in a telephoto state;

[0072] FIG15 f is a field curvature curve and a distortion curve of the optical lens in the seventh embodiment of the present application when in a telephoto state;

[0073] FIG16 a is a schematic structural diagram of the optical lens in the eighth embodiment of the present application when in a short-focus state;

[0074] FIG16 b is a schematic structural diagram of the optical lens in the eighth embodiment of the present application when in a telephoto state;

[0075] FIG16 c is 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 short-focus state;

[0076] FIG16 d is 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;

[0077] FIG17 a is a schematic structural diagram of the optical lens in the ninth embodiment of the present application when in a short-focus state;

[0078] FIG17 b is a schematic structural diagram of the optical lens in the ninth embodiment of the present application when in a telephoto state;

[0079] FIG17 c is an axial spherical aberration curve of the optical lens in the ninth embodiment of the present application when in a short-focus state;

[0080] FIG17 d is a field curvature curve and a distortion curve of the optical lens in the ninth embodiment of the present application when in a short-focus state;

[0081] FIG17e is an axial spherical aberration curve of the optical lens in the ninth embodiment of the present application when in a telephoto state;

[0082] FIG17 f is a field curvature curve and a distortion curve of the optical lens in the ninth embodiment of the present application when in a telephoto state;

[0083] FIG18 a is a schematic structural diagram of the optical lens in the tenth embodiment of the present application when in a short-focus state;

[0084] FIG18 b is a schematic structural diagram of the optical lens in the tenth embodiment of the present application when in a telephoto state;

[0085] FIG18 c is an axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens in the tenth embodiment of the present application when in a short-focus state;

[0086] FIG18 d is an axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens in the tenth embodiment of the present application when in a telephoto state;

[0087] FIG19a is a schematic structural diagram of the optical lens in the eleventh embodiment of the present application when in a short-focus state;

[0088] FIG19 b is a schematic structural diagram of the optical lens in the eleventh embodiment of the present application when in a telephoto state;

[0089] FIG19 c is an axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens in the eleventh embodiment of the present application when in a short-focus state;

[0090] FIG19 d is an axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens in the eleventh embodiment of the present application when in a telephoto state. DETAILED DESCRIPTION

[0091] The following explains and describes the relevant technical terms involved in the embodiments of this application.

[0092] Focal power, expressed as the reciprocal of the image-side focal length (assuming 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.

[0093] A positive lens, also known as a converging lens or convex lens, has the function of converging light. Convex lenses are divided into biconvex, plano-convex, and concave-convex (or positive meniscus) forms.

[0094] Negative lens, also known as diverging lens or concave lens, has a diverging effect on light. Concave lenses are divided into biconcave, plano-concave, convex-concave and other forms.

[0095] 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.

[0096] Focal length is a measure of the convergence or divergence of light in an optical system. Focal length is divided into image-side focal length and object-side focal length. The image-side focal length is the distance from the image-side principal plane to the image-side focal point. Similarly, the object-side focal length is the distance from the object-side principal plane to the object-side focal point. The focal length, effective focal length (EFL), and combined focal length described in the embodiments of this application all refer to the image-side focal length.

[0097] The principal plane of a lens (lens group), also called the principal surface, includes the image side principal surface and the object side principal surface. When parallel light is irradiated on the 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 a point. The plane perpendicular to the optical axis made through this point is the image side principal surface, and the intersection of the image side principal surface and the optical axis of the optical lens is the image side principal point. Similarly, light emitted from the object side focus becomes parallel light after refraction through the lens. The incident light is extended and intersects with the parallel light at a point. The plane perpendicular to the optical axis made through this point is the object side principal surface, and the intersection of the object side principal surface and the optical axis of the optical lens is the object side principal point.

[0098] As shown in Figure 1a, AB is an incident light ray parallel to the optical axis. After passing through an optical system (which can be a single lens or a lens system formed by multiple lenses), the outgoing light ray E'F' intersects the optical axis at F'. Based on the imaging theory of ideal optical systems, F' is the image point of the object point on the axis at infinity, known as the image-side focal point. Extending the incident light ray AB and the outgoing light ray E'F' in opposite directions will result in the two rays intersecting at a single point, designated Q'. A plane perpendicular to the optical axis is drawn through Q', intersecting the optical axis at point H'. H' is then called the image-side principal point, and the plane Q'H' is called the image-side principal plane. The distance from the principal point H' to the focal point F' is called the image-side focal length.

[0099] As shown in Figure 1b, F is called the object focus. Suppose the extension line of the incident light emitted from the focus F and the extension line of the corresponding outgoing light parallel to the optical axis intersect 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, the QH plane is called the object principal plane, and the distance from the object principal point H to the object focus F is called the object focal length of the optical system.

[0100] The object distance, as shown in FIG1c , refers to the distance from the object plane to the object principal plane of the optical system, and is represented by the English letter U; wherein the optical system can be a single lens or a lens group formed by multiple lenses.

[0101] Image distance, as shown in FIG1c , refers to the distance from the image plane to the principal surface of the image side of the optical system, and is represented by the English letter V; wherein the optical system can be a single lens or a lens group formed by multiple lenses.

[0102] Focusing specifically refers to adjusting the position of the lens group (i.e., the focusing lens group) in the optical lens to control the image distance so that the image plane of the optical lens falls on the photosensitive element to make the image of the optical lens clearest.

[0103] 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.

[0104] The focus stroke refers to the distance the focus lens group moves during the focusing process of an optical lens. For example, when an optical lens switches from focusing on a distant view to focusing on a close view, the distance the focus lens group moves along the optical axis is the focus stroke.

[0105] 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.

[0106] An aperture is an entity that limits the light beam in an optical system. It can be the edge of a lens, a frame, or a specially designed screen with holes. The function of an aperture can be divided into two aspects: limiting the light beam or limiting the field of view (imaging range). The aperture that most limits the light beam in an optical system is called the aperture aperture, while the aperture that most limits the field of view (size) is called the field aperture.

[0107] A variable aperture diaphragm refers to an diaphragm that can change the size of the light-passing aperture.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] ImgH (Image Hight) represents half of the diagonal length of the effective photosensitive area on the photosensitive element, that is, the image height.

[0113] The Abbe number (Abbe), also known as the 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.

[0114] 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.

[0115] Spherical aberration is a wide-beam aberration. Concentric beams emitted from an on-axis point cease to be concentric after passing through an optical system. Light rays of varying incident heights intersect the optical axis at different positions after passing through the system, resulting in varying degrees of deviation from the paraxial image point (the ideal image point). This deviation is called axial spherical aberration, or simply spherical aberration. Due to spherical aberration, the image point on the Gaussian image plane is no longer a point but a circular diffuse spot. The radius of this diffuse spot is called vertical spherical aberration.

[0116] Coma is an aberration that occurs when a wide beam of light is viewed from an off-axis point. In an optical system with coma, the image of an off-axis object on the ideal image plane resembles a comet-like spot. Thin beams of light close to the principal ray intersect with it to form a bright spot, while beams of light of varying apertures farther from the principal ray form images of different circular rings. This imaging defect is therefore called coma.

[0117] Chromatic aberration (CA) occurs when optical materials have different refractive indices for different wavelengths of light. Consequently, light rays of different colors with the same aperture intersect the optical axis at different points after passing through an optical system. Light rays of different colors with different apertures also intersect the optical axis at different points. Consequently, at any position on the image plane, the image of an object point appears as a diffuse, colorful patch. The differences in image position and size between different colors are called chromatic aberration. There are two types of chromatic aberration: axial chromatic aberration and vertical chromatic aberration.

[0118] 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.

[0119] Vertical axis chromatic aberration: The same medium has different refractive indices for different colors of light. Therefore, for off-axis object points, the vertical axis magnification of different colors of light is also equal. This difference is called vertical axis chromatic aberration, also called magnification chromatic aberration.

[0120] 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.

[0121] Field curvature describes the difference between the sharpest image point position of non-central field rays after passing through an optical lens system and the sharpest image point position on the optical axis in the central field of view. When field curvature exists, image points beyond the paraxial region on a Gaussian plane become blurred, and the image of a flat object becomes a curved surface of rotation, resulting in a lack of a perfect image of the object plane at the image plane.

[0122] Astigmatism: The meridional image point and sagittal image point of a thin beam do not coincide, and the axial distance separating the two is called astigmatism.

[0123] The meridional plane is the plane formed by the principal ray emitted from an object point located outside the principal axis of an optical system and the principal axis of the optical system. Rays lying within this meridional plane are collectively referred to as meridional beams. The point formed by a meridional beam is called a meridional image point. The image plane in which the meridional image point resides is called the meridional image plane.

[0124] The sagittal plane is the plane perpendicular to the meridional plane and passes through the principal ray emitted by an object point located outside the principal axis of an optical system. Rays lying within the sagittal plane are collectively referred to as sagittal beams. The point formed by a sagittal beam is called a sagittal image point. The image plane containing the sagittal image point is called the sagittal image plane.

[0125] Figure 2a is a schematic diagram of the structure of an optical lens of a camera module installed in an electronic device in the related art in a first state, and Figure 2b is a schematic diagram of the structure of an optical lens of a camera module in the related art in a second state. As shown in Figures 2a and 2b, the optical lens includes a turning element 01 and a lens group 02 arranged in a direction 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 reflective surface 0112, and a first exit surface 0113. The second prism 012 includes a second incident surface 0121, a second reflective surface 0122, and a second exit surface 0123. The first reflective surface 0112 and the second reflective surface 0122 are in contact with each other, and the first incident surface 0111 and the second incident surface 0121 have different curvatures.

[0126] The turning element 01 can rotate between a first position and a second position. As shown in FIG2a , 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. After being turned by the first prism 011, it passes through the lens group 02 and is irradiated onto the photosensitive surface of the photosensitive element 03. At this time, the optical lens has a first focal length; as shown in FIG2b , when the turning element 01 is in the second position, the second incident surface 0121 faces the object side. 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 is irradiated 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.

[0127] 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 zoom of the optical lens.

[0128] 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 prisms in 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 lightweight and thinning of the electronic device.

[0129] The present application provides an optical lens, a camera module, and an electronic device. The optical lens includes a movable turning element. By moving the turning element to the image side of different front lens groups, different optical systems can be formed to achieve zoom. During movement, the turning element does not occupy additional space in the direction of light entry of the optical lens, thereby facilitating a reduction in the thickness of the electronic device.

[0130] The technical solutions in some embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0131] The electronic device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch), and other electronic devices 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 can be specifically set up with reference to the structure of the mobile phone embodiment, and will not be described one by one here.

[0132] Figure 3 is a schematic diagram of the back of an electronic device (mobile phone) in some embodiments of the present application, Figure 4 is a cross-sectional view taken along line AA of the electronic device in Figure 3, and Figure 5 is a schematic diagram of the structure of the electronic device in Figure 4 in another state. As shown in Figures 3 to 5, the electronic device includes a housing 200, a display screen 300, and a camera module 100, with the camera module 100 mounted on the housing 200.

[0133] In some embodiments, as shown in Figures 4 and 5, the housing 200 includes a middle frame 210 (also referred to as a front shell or front frame) and a back cover 220 (also referred to as a battery cover). The display screen 300 is disposed on one side of the middle frame 210, and the back cover 220 is disposed on the other side of the middle frame 210. The back cover 220 and the middle frame 210 enclose a first storage space 230, in which the camera module 100 is disposed. The display screen 300 and the middle frame 210 enclose a second storage space 240, which is used to accommodate electronic components such as a motherboard 400. The motherboard 400 is connected to the display screen 300 and the camera module 100 via flexible circuit boards.

[0134] The display screen 300 may be a liquid crystal display or an OLED (Organic Light-Emitting Diode) display, without specific limitation. In addition to being mounted in the first receiving space 230 , the camera module 100 may also be mounted in the second receiving space 240 to serve as a front-facing camera module for the electronic device.

[0135] In some embodiments, as shown in Figures 4 and 5, 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, allowing light to pass through the optical lens 10 and illuminate the photosensitive surface of the photosensitive element 20.

[0136] 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.

[0137] The photosensitive element 20 (also known as an image sensor) is a semiconductor chip with hundreds of thousands to millions of photodiodes on its surface. When exposed to light, these diodes generate an electrical charge. The photosensitive element 20 can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS), without further limitation.

[0138] The filter 30 is used to filter out unwanted wavelengths in the light, preventing the photosensitive element 20 from generating false colors or ripples, thereby improving its effective resolution and color reproduction. In some embodiments, as shown in FIG3 , the filter 30 is an infrared filter.

[0139] As shown in FIG3 , 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.

[0140] In some embodiments, as shown in FIG. 3 , the camera module 100 includes a camera housing 40 , in which a portion of the optical lens 10 , the photosensitive element 20 , and the filter 30 are disposed.

[0141] FIG6 is a schematic diagram of the structure of the optical lens in the first embodiment of the present application when in a short-focus state, and FIG7 is a schematic diagram of the structure of the optical lens in the first embodiment of the present application when in a long-focus state. As shown in FIG6 and FIG7, 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 in a direction from 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.

[0142] The first turning element 1 can move between a first position and a second position along a first direction X; as shown in Figure 6, when the first turning element 1 is in the first position, the first turning element 1 is located on 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, and the optical lens 10 has a first effective focal length F1.

[0143] As shown in Figure 7, when the first turning element 1 is located in the second position, the first turning element 1 is located on 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 F2, and the second effective focal length F2 is greater than the first effective focal length F1; that is, the optical lens 10 is in a short-focus state when the first turning element 1 is located in the first position, and the optical lens 10 is in a long-focus state when the first turning element 1 is located in the second position.

[0144] 3 and 4 , a first camera window 221 and a second camera window 222 are provided on the back cover 220. 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 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 light emitted by the object being photographed outside the shell 200 when it is in a long-focus state.

[0145] In the optical lens 10 of the embodiment of the present application, as shown in Figures 6 and 7 , the first turning element 1 can be moved along a first direction X to the image side of the first front lens group G01 and the second front lens group G02, respectively. This allows the formation of an optical system with different effective focal lengths, thereby achieving zooming of the optical lens 10. During the movement of the first turning element 1 along the first direction X, no additional space is added to the optical lens in the light-entry direction Y (i.e., the thickness direction of the electronic device). This helps reduce the space occupied by the camera module 100 in the thickness direction of the electronic device, thereby facilitating the thinning and lightweighting of the electronic device.

[0146] As shown in Figures 6 and 7 , the travel distance L of the first turning element 1 between the first and second positions satisfies the following condition: L ≤ 23 mm. For example, the travel distance L can be 8.218 mm, 8.956 mm, 12.906 mm, 13.719 mm, 22.834 mm, etc. This configuration prevents the travel distance L of the first turning element from being excessively large, allowing the actuator (e.g., the drive motor) of the first turning element 1 to be designed more compactly, thereby further enhancing the structure of the camera module.

[0147] As shown in FIG6 and FIG7 , the movement stroke L may 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 .

[0148] FIG8 is a schematic diagram of the optical lens 10 in the first embodiment of the present application in the short-focus state and the long-focus state. As shown in FIG6 and FIG8 (1), when the first turning element 1 is in 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 TTL1. As shown in FIG7 and FIG8 (2), when the first turning element 1 is in 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 TTL2.

[0149] As shown in Figures 6 and 7 , TTL1 = A1A2 + A2O, i.e., TTL1 is the sum of the lengths of line segments A1A2 and A2O; TTL2 = B1B2 + B2O, i.e., TTL2 is the sum of the lengths of line segments B1B2 and B2O. A1 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; A2 is the intersection of the optical axis of the first front lens group G01 and the reflective surface of the first inflection element 1; O is the intersection of the optical axis of the first rear lens group G1 and the image plane (i.e., the photosensitive surface of the photosensitive element 20); B1 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; and B2 is the intersection of the optical axis of the second front lens group G02 and the reflective surface of the first inflection element 1.

[0150] As shown in (1) and (2) in FIG8 , 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; TTL1 and TTL2 satisfy: TTL2-TTL1≤23mm. For example, TTL2-TTL1 can be 8.218mm, 8.956mm, 12.906mm, 13.719mm, 22.834mm, etc.

[0151] As shown in (1) and (2) in Figure 8, since the position of the image plane IMA of the optical lens 10 remains unchanged when the first turning element 1 moves between the first position and the second position, the moving stroke L of the first turning element 1 between the first position and the second position is L=TTL2-TTL1. By limiting TTL2-TTL1≤23mm, it is possible to avoid the moving stroke L of the first turning element 1 being too large. In this way, 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.

[0152] In some embodiments, as shown in Figures 6, 7 and 8, 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 X, 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.

[0153] Since the first rear lens group G1 is a movable lens group and the second rear lens group G2 is a fixed lens group, as shown in FIG8 , 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 positional drift of the image plane IMA of the optical lens 10, thereby maintaining the position of the image plane IMA of the optical lens 10. In addition, when the optical lens 10 switches between focusing on a distant view and focusing on a near view in the first position or the second position, the first rear lens group G1 can move along the first direction X, thereby achieving precise focusing of the image plane IMA of the optical lens 10.

[0154] As shown in Figures 4 and 5 , 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 fixed relative to the front lens group G0 along the first direction X, specifically: the second rear lens group G2 is fixed relative to the first front lens group G01 or the second front lens group G02 along the first direction X.

[0155] In some embodiments, as shown in FIG8 , 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:

[0156] TTL2-TTL1=|f g02 -f g01 +k·f g1 |.

[0157] Wherein, the coefficient k satisfies: 0≤|k|<1.

[0158] According to the relationship TTL2-TTL1=|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, thereby making the structure of the camera module 100 more compact, and helping to reduce the space occupied by the camera module 100.

[0159] In some embodiments, as shown in FIG8 , 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:

[0160] Coefficient k = [(β1-1) 2 / β1]-[(β2-1) 2 / β2].

[0161] Among them, the first focal length distribution ratio β1=f g011 / f g01 ; The second focal length distribution ratio β2 = f g021 / f g02 .

[0162] According to the relationship k=[(β1-1) 2 / β1]-[(β2-1) 2 / β2] It can be seen that the coefficient k is related to the first focal length distribution ratio β1 and the second focal length distribution ratio β2. By reasonably setting the size of the first focal length distribution ratio β1 and the second focal length distribution ratio β2, 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.

[0163] The following uses the optical lens 10 shown in FIG8 as an example to illustrate the relationship TTL2-TTL1=|f g02 -f g01 +k·f g1 |The derivation process:

[0164] As shown in (1) in FIG8 , 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 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.

[0165] 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 follows:

[0166] d 011 =f g01 +f g1 -f g01 f g1 / f g011 ;

[0167] The object distance from the image m01 to the first rear lens group G1 is U1 = d 011 -V 01 The image distance V1 of image m1 is calculated according to Gauss's formula as follows:

[0168] V1=U1f g1 / (U1-f g1 )=f g1 (f g01 -f g011 ) / f g01 ;

[0169] The total length of the first optical system is as follows:

[0170] TTL1=d 011 +V1+V2-U2=f g01 +2f g1 -f g1 (f g01 / f g011 +f g011 / f g01 )+V2-U2;

[0171] Similarly, as shown in (2) in Figure 8, the total length of the second optical system is as follows:

[0172] TTL2=f g02 +2f g1 -f g1 (f g02 / f g012 +f g021 / f g02 )+V2-U2;

[0173] As shown in (1) and (2) in FIG8 , since the positions of the image plane IMA of the optical lens 10 and the second rear lens group G2 remain unchanged when the first turning element 1 moves between the first position and the second position, the image distance V2 and the object distance U2 of the second rear lens group G2 are the same in the first optical system (i.e., G01+first turning element 1+G1+G2) and the second optical system (i.e., G02+first turning element 1+G1+G2), and the difference between TTL2 and TTL1 is equal to the moving stroke L of the first turning element 1 between the first position and the second position. Therefore, it can be concluded that:

[0174] L=TTL2-TTL1=f g02 -f g01 +f g1 [(β1-1) 2 / β1-(β2-1) 2 / β2];

[0175] That is, L=|f g02 -f g01 +f g1 [(β1-1) 2 / β1-(β2-1) 2 / β2]|.

[0176] In some embodiments, the coefficient k=0; wherein the first focal length distribution ratio β1 is equal to the second focal length distribution ratio β2. In this configuration, the moving stroke L of the first turning element 1 is L=TTL2-TTL1=|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 reasonably 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 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 distribution ratio β1 and the second focal length distribution ratio β2 are approximately equal (for example, the difference is within 0.005), for example, β1 is 0.447, and β2 is 0.448. With this configuration, the moving stroke L of the first turning element 1 = TTL2-TTL1≈|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 reasonably 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.

[0178] In some embodiments, the coefficient k satisfies: 0.28≤k≤0.46; for example, the coefficient k can be 0.291, 0.375, 0.411, 0.454, etc. The first focal length distribution ratio β1 and the second focal length distribution ratio β2 are not equal and differ greatly (for example, the difference is greater than 0.005), for example, β1 is 0.370 and β2 is 0.453. This configuration can prevent the coefficient k from being too large or too small, thereby preventing the movement stroke L of the first turning element 1 from being too large or too small. If the movement 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 movement stroke L of the first turning element 1 is too small, the precision requirement for 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 is possible to reduce the space occupied by the camera module 100 and reduce the cost of the camera module 100.

[0179] 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, such as 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 occupied space of the camera module 100, but also help reduce the cost of the camera module 100.

[0180] In some embodiments, as shown in FIG8 , TTL1 and TTL2 satisfy the following: TTL2-TTL1 ≥ 8.1 mm. This configuration prevents TTL2-TTL1 from being too small. If TTL2-TTL1 is too small, the difference in effective focal length between the first optical system (G01+first turning element 1+G1+G2) and the second optical system (G02+first turning element 1+G1+G2) will be too small, which is not conducive to improving the zoom ratio (or zoom range) of the optical lens 10. By setting TTL1 and TTL2 to TTL2-TTL1 ≥ 8.1 mm, the zoom ratio (or zoom range) of the optical lens 10 can be improved.

[0181] In some embodiments, as shown in FIG8 , 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 f g02 <f g01 , by changing f g02 、f g01 Set to f g02 >f g01 In this way, 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, which is beneficial to improving the zoom performance of the optical lens 10.

[0182] In some embodiments, as shown in FIG6 , when the first turning element 1 is located at the first position, that is, the optical lens 10 is in a short-focus 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 、The first effective focal length F1 satisfies: stroke compression ratio coefficient ξ1=[1-β1 2 ]α1 2 , β1=f g011 / f g01 , α1=F1 / f g011 , and 0<ξ1≤3. For example, ξ1 can be 2.25, 2.518, 2.263, 2.264, 2.212, etc.

[0183] By setting the stroke compression ratio coefficient ξ1 to 0<ξ1≤3, the focusing stroke of the first rear lens group G1 can be reduced, which is beneficial to reducing the volume of the focus motor; it can also avoid the focusing stroke of the first rear lens group G1 being too short, reducing the accuracy requirements for the focus motor, which is beneficial to reducing costs.

[0184] In some embodiments, as shown in FIG7 , when the first turning element 1 is located at the second position, that is, the optical lens 10 is in the 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 The second effective focal length F2 satisfies: stroke compression ratio coefficient ξ2 = [1-β2 2 ]α2 2 , β2=f g021 / f g02 , α2=F2 / f g021 , and 0<ξ2≤3. For example, ξ2 can be 2.263, 2.363, 2.192, 2.064, 2.212, etc.

[0185] By setting the stroke compression ratio coefficient ξ2 to 0<ξ2≤3, the focusing stroke of the first rear lens group G1 can be reduced, which is beneficial to reducing the volume 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.

[0186] To facilitate 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 described below using the optical lens 10 in the short focus state as an example:

[0187] As shown in FIG9 , FIG9 is a diagram illustrating the focusing principle of the optical lens 10 in the first embodiment of the present application when in a short-focus state. The optical path in FIG9 is illustrated by taking the paths of two light rays emitted from an on-axis object point of the subject as an example.

[0188] Assume that the initial object distance of the object photographed by the optical lens 10 is U, and the initial image distance is V. As shown in (2) in FIG9 , 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. As shown in (3) in FIG9 , 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 change is △U, and the moving distance of the first rear lens group G1 (that is, the focusing stroke) is △X, so that the position of the image plane IMA remains unchanged.

[0189] Define ξ1 as: ξ1 = △V / △X (Equation 2);

[0190] Based on Newton's formula, it can be seen that the relationship between the object distance, image distance and effective focal length of the optical lens 10 satisfies:

[0191] 1 / U+1 / V=1 / F1 (Formula 3);

[0192] As shown in (1) and (2) in FIG9 , when the object moves to the right by ΔU, 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 ΔV;

[0193] 1 / (U-△U)+1 / (V+△V)=1 / F1;

[0194] △V / △U=(V / U) 2 ≈(F1 / U) 2 ; Among them, (V / U) 2 ≈(F1 / U) 2 The condition is that the absolute value of the object distance to the object being photographed is much larger than the absolute value of the focal length, that is, |U|>>|F1|.

[0195] The image plane IMA of the optical lens 10 moves rightward by ΔV=ΔU(F1 / U) 2 (Formula 4);

[0196] As shown in (2) in FIG9 , when the object moves to the right by ΔU, the object distance from the object to the principal surface of the first front lens group G01 is U0, 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 distance to the right by which the image m1 formed by the system composed of the first front lens group G01 and the first rear lens group G1 moves is:

[0197] △U(f g01 / U 01 ) 2 =△U(f g01 / U0) 2 (f g1 / U1) 2 (Formula 5);

[0198] Wherein, U1 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; U 01 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. As shown in (3) of Figure 9, when the object moves rightward by ΔU, 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 leftward by ΔX;

[0199] The image m01 of the object formed by the first front lens group G01 moves to the right by △U(f g01 / U0) 2 ;

[0200] The image m1 formed by the first rear lens group G1 does not move, that is:

[0201] [△U(f g01 / U0) 2 +△X]·(f g1 / U1) 2 -ΔX=0 (Equation 6);

[0202] Under the premise that the object distance (absolute value) of the object is much greater than the focal length (absolute value), it is considered that U0≈U 01 ≈U;

[0203] From equations 2 to 6, we can get: ξ1=△V / △X=[1-(f g011 / f g01 ) 2 ](F1 / f g011 ) 2 =[1-β1 2 ]α1 2 ;

[0204] From the formula of ξ1, we can see that the size of ξ1 is closely related to f g011 、f g01 , F1 related.

[0205] As can be seen from Formula 2, the stroke compression ratio coefficient is the change in image distance caused by the movement of the focus lens group per unit distance. The larger the stroke compression ratio coefficient, the greater the change in image distance caused by the movement of the focus lens group per 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 ratio of the focus stroke of the solution in which the first rear lens group G1 is used as the focus lens group (such as the solution in Figures 6 and 7, that is, the internal focus solution) to the focus stroke of the solution in which the first front lens group G01, the first rear lens group G1, and the second rear lens group G2 are moved as a whole for focusing. The value of the solution in which the first rear lens group G1 is used as the focus lens group is that it has a shorter focus 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 are moved as a whole for focusing.

[0206] Similarly, when the optical lens 10 is in the telephoto state, the stroke compression ratio coefficient ξ2=[1-β2 2 ]α2 2 .

[0207] In some embodiments, as shown in FIG6 , 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; for example, β1 can be 0.364, 0.367, 0.370, 0.447, etc. Where, β1=f g011 / f g01 .

[0208] According to the relationship ξ1=[1-β1 2 ]α1 2 It can be seen that the stroke compression ratio coefficient ξ1 is inversely proportional to the size of β1. By setting β1 to 0<β1≤0.5, β1 can be avoided from being too large, thereby avoiding the stroke compression ratio coefficient ξ1 from being too small. This is beneficial to reducing the focusing stroke of the first rear lens group G1 and reducing the volume of the focusing motor.

[0209] In some embodiments, as shown in FIG7 , 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; for example, β2 can be 0.416, 0.439, 0.453, 0.464, 0.448, etc. Where, β2=f g021 / f g02 .

[0210] According to the relationship ξ2=[1-β2 2 ]α2 2 It can be seen that the stroke compression ratio coefficient ξ2 is inversely proportional to the size of β2. By setting β2 to 0<β2≤0.5, β2 can be avoided from being too large, thereby avoiding the stroke compression ratio coefficient ξ2 from being too small. This is beneficial to reducing the focusing stroke of the first rear lens group G1 and reducing the volume of the focusing motor.

[0211] In some embodiments, as shown in FIG6 , 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 .

[0212] According to the relationship ξ1=[1-β1 2 ]α1 2 It can be seen that the stroke compression ratio coefficient ξ1 and 1-β1 2 is proportional to the size of 2 Set to 0.75≤1-β12 <1, so as to avoid 1-β1 2 Too large or too small, so as to avoid the stroke compression ratio coefficient ξ1 being too large or too small, which can reduce the focusing stroke of the first rear lens group G1, which is beneficial to reducing the volume of the focusing motor; and avoid the focusing stroke of the first rear lens group G1 being too short, which reduces the accuracy requirements for the focusing motor and is beneficial to reducing costs.

[0213] In some embodiments, as shown in FIG7 , 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 .

[0214] According to the relationship ξ2=[1-β2 2 ]α2 2 It can be seen that the stroke compression ratio coefficient ξ2 is related to 1-β2 2 is proportional to the size of 2 Set to 0.75≤1-β2 2 <1, so as to avoid 1-β2 2 Too large or too small, so as to avoid the stroke compression ratio coefficient ξ2 being too large or too small, which can reduce the focusing stroke of the first rear lens group G1, which is beneficial to reducing the volume 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 of the focusing motor, and help reduce costs.

[0215] In some embodiments, as shown in FIG6 , 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; for example, α1 can be 1.611, 1.706, 1.620, 1.620, 1.662, etc. Wherein, α1=F1 / f g011 .

[0216] According to the relationship ξ1=[1-β1 2 ]α1 2 It can be seen that the stroke compression ratio coefficient ξ1 is proportional to α1. By setting α1 to 0<α1≤2, it is possible to avoid α1 being too large, thereby avoiding the stroke compression ratio coefficient ξ1 being too large, and then reducing the accuracy requirements for the focus motor, which is conducive to reducing costs.

[0217] In some embodiments, as shown in FIG7 , the combined focal length f of the second front lens group G02 and the first rear lens group G1 is g021The second effective focal length F2 satisfies: 0<α2≤2; for example, α2 can be 1.655, 1.710, 1.661, 1.622, 1.663, etc. Wherein, α2=F2 / f g021 .

[0218] According to the relationship ξ2=[1-β2 2 ]α2 2 It can be seen that the stroke compression ratio coefficient ξ2 is proportional to α2. By setting α2 to 0<α2≤2, it is possible to avoid α2 being too large, thereby avoiding the stroke compression ratio coefficient ξ2 being too large, and then reducing the accuracy requirements for the focus motor, which is conducive to reducing costs.

[0219] In some embodiments, as shown in FIG6 and FIG7 , 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.

[0220] By setting the optical power 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 focus the light beam, reducing the diameter of the light beam, thereby facilitating a reduction in the diameter of the first rear lens group G1 and the second rear lens group G2. By setting the optical power of the first rear lens group G1 and the second rear lens group G2 to be positive or negative, some aberrations can be offset, thereby facilitating a reduction in aberrations of the optical lens 10 and ensuring the imaging quality of the optical lens 10.

[0221] Of course, the focal powers of the first rear lens group G1 and the second rear lens group G2 are swapped with each other, that is, the focal power of the first rear lens group G1 is negative, and the focal power of the second rear lens group G2 is positive.

[0222] In some embodiments, as shown in FIG6 and FIG7 , 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.

[0223] 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, and the second lens L12 has negative refractive power. There is a gap between adjacent first lens L11, second lens L12 and third lens L13.

[0224] 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 and the fifth lens L22 both have negative refractive power, and there is a gap between the fourth lens L21 and the fifth lens L22.

[0225] By using a combination of positive, negative, and positive optical powers for the lenses in the first lens group G1, it is more advantageous to correct aberrations of the optical lens 10. Since there are gaps between adjacent first lens L11, second lens L12, and third lens L13, the number of lens surfaces in the first rear lens group G1 is increased, thereby increasing the design freedom of the first rear lens group G1 and facilitating the correction of aberrations of the optical lens 10.

[0226] By using a negative / negative combination of the optical powers of the lenses in the second rear lens group G2, it is advantageous to balance the optical powers of the optical lens 10. Due to the gap between the fourth lens L21 and the fifth lens L22, the number of lens surfaces in the second rear lens group G2 is increased, which increases the degree of freedom in the design of the second rear lens group G2, thereby facilitating the correction of aberrations in the optical lens 10.

[0227] 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 with positive and negative power, which is beneficial to offset positive and negative aberrations, thereby facilitating the correction of the aberrations of the optical lens 10.

[0228] In some embodiments, as shown in Figures 6 and 7, 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.

[0229] In some embodiments, as shown in Figures 6 and 7, 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°.

[0230] Of course, the first turning element 1 may be a reflector in addition to a prism.

[0231] In some embodiments, as shown in Figure 6, 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 each adjacent two 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 pressure ring 52 is provided at the other end. The limiting flange 411 and the pressure ring 52 confine the first rear lens group G1 within the first fixed barrel 41.

[0232] In some embodiments, as shown in FIG6 , 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 may be provided at the edge of the second lens L12.

[0233] In some embodiments, as shown in FIG6 , 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 .

[0234] In some embodiments, as shown in FIG6 , a light shielding ring 53 is provided at the edge of at least one of the fourth lens element L21 and the fifth lens element 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 element L21 and the fifth lens element L24, respectively.

[0235] FIG10 is a 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. The main difference between the optical lens 10 shown in FIG10 and the optical lens 10 shown in FIG7 is that the optical lens 10 in FIG10 is additionally provided with a second turning element 3, as described below:

[0236] As shown in Figure 10, 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. 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.

[0237] By providing the second turning element 3, the optical 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 beneficial 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.

[0238] In some embodiments, as shown in FIG10 , 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 reflecting surface 33 and the optical axis of the second rear lens group G2 is an acute angle, such as 45°.

[0239] Of course, the second turning element 3 may be a reflector in addition to a prism.

[0240] FIG11 is a schematic diagram of the structure of the optical lens 10 in the third embodiment of the present application when in a telephoto state. The main difference between the optical lens 10 shown in FIG11 and the optical lens 10 shown in FIG10 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:

[0241] As shown in Figure 11, 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°.

[0242] 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 conducive to reducing the thickness of the electronic device.

[0243] In some embodiments, as shown in FIG11 , second deflection element 3 is a secondary reflective prism having a prism reflective surface 33 connected between prism incident surface 31 and prism exit surface 32. Prism exit surface 32 is both a refractive and reflective surface. A light beam entering second deflection element 3 from prism incident surface 31 is reflected twice by prism exit surface 32 and prism reflective surface 33 before exiting second deflection element 3 from prism exit surface 32.

[0244] As shown in Figure 11, 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°.

[0245] 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 quadratic reflection prism, etc., which is not specifically limited here.

[0246] FIG12 is a 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. The main difference between the optical lens 10 shown in FIG12 and the optical lens 10 shown in FIG7 is that the structure of the front lens group G0 is different, as described below:

[0247] As shown in Figure 12, the front lens group G0 also includes a third front lens group G03, which is disposed 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 in the third position, it is located on the image side of the third front lens group G03. The optical lens 10 has a third effective focal length F3, and F1 < F3 < F2, indicating that the optical lens 10 is in a neutral focus state. This arrangement increases the zoom range of the optical lens 10, thereby improving the zoom performance of the optical lens 10.

[0248] In some embodiments, as shown in Figure 12, 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).

[0249] Since the second front lens group G02 includes two positive lenses arranged apart from each other, this is beneficial to increasing the number of lens surfaces in the second front lens group G02, increasing the freedom of design of the second front lens group G02, and thus facilitating the correction of aberrations of the optical lens 10.

[0250] FIG13 is a 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. The main difference between the optical lens 10 shown in FIG13 and the optical lens 10 shown in FIG10 is that the movable lens group in the optical lens 10 is different, as described below:

[0251] As shown in FIG13 , the second rear lens group G2 is fixed relative to the first rear lens group G1 to form a rear lens group G10. The rear lens group G10 is a movable lens group and can be moved relative to the front lens group G0 along the first direction X. With such an arrangement, when the optical lens 10 switches between focusing on a distant view and focusing on a near view, the rear lens group G10 can be moved along the first direction X to achieve internal focusing 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 be moved along the first direction X. For example, as shown in FIG8 , when the first turning element 1 moves from the first position to the second position, the rear lens group G10 moves in a direction 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.

[0252] FIG14a is a 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, and FIG14b is a schematic diagram of the structure of the optical lens 10 in the fifth embodiment of the present application when it is in a long-focus state. The main difference between the optical lens 10 shown in FIG14a and FIG14b and the optical lens 10 shown in FIG6 and FIG7 is that the optical lens 10 shown in FIG14a and FIG14b is additionally provided with a light shielding device 2, which is described in detail as follows:

[0253] As shown in FIG14a and FIG14b , a light shielding device 2 is provided on the object side of the first turning element 1. As shown in FIG14a , when the first turning element 1 is in the first position, the light shielding device 2 is used to shield 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 can be the incident light beam of the second front lens group G02 (as shown in FIG14a ), the outgoing light beam of the second front lens group G02, or the light beam between the lenses of the second front lens group G02.

[0254] As shown in Figure 14b, when the first turning element 1 is in the second position, the shading device 2 is used to block the light beam (i.e., the second light beam) directed toward the image side of the first front lens group G01. The second light beam can be the incident light beam of the first front lens group G01 (as shown in Figure 14b), or the outgoing light beam of the first front lens group G01, or the light beam between the lenses of the first front lens group G01.

[0255] By setting up the shading device 2, as shown in Figure 14a, when the first turning element 1 is located in 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; as shown in Figure 14b, when the first turning element 1 is located in 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 long-focus state.

[0256] In some embodiments, as shown in Figures 14a and 14b, 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.

[0257] As shown in Figure 14a, when the first turning element 1 is in the first position, the first variable aperture diaphragm 21 is in the open state, and the second variable aperture diaphragm 22 is in the closed state to block the incident light beam of the second front lens group G02; as shown in Figure 14b, when the first turning element 1 is in the second position, the first variable aperture diaphragm 21 is in the closed state to block the incident light beam of the first front lens group G01, and the second variable aperture diaphragm 22 is in the open state.

[0258] With such an 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 in 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 improvement in the imaging quality of the optical lens 10 when in a short-focus state; when the first turning element 1 is located in 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 improvement in the imaging quality of the optical lens 10 when in a long-focus state.

[0259] In addition to being set on the object side of the first front lens group G01, the above-mentioned first variable aperture diaphragm 21 can also be set on the image side of the first front lens group G01, or can be set between the lenses of the first front lens group G01; in addition to being set on the object side of the second front lens group G02, the above-mentioned second variable aperture diaphragm 22 can also be set on the image side of the second front lens group G02, or can be set between the lenses of the second front lens group G02.

[0260] FIG14c is a 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, and FIG14d is a schematic diagram of the structure of the optical lens 10 in the sixth embodiment of the present application when it is in a long-focus state. The main difference between the optical lens 10 shown in FIG14c and FIG14d and the optical lens 10 shown in FIG14a and FIG14b is that the structure of the light shielding device 2 is different, as described below:

[0261] As shown in Figures 14c and 14d, the shading device 2 includes a baffle 23; the baffle 23 is arranged on the image side of the front lens group G0 and can be moved relative to the front lens group G0. As shown in Figure 14c, when the first turning element 1 is located in the first position, the baffle 23 moves to the image side of the second front lens group G02 to block the outgoing light beam of the second front lens group G02; as shown in Figure 14d, when the first turning element 1 is located in the second position, the baffle 23 moves to the image side of the first front lens group G01 to block the outgoing light beam of the first front lens group G01.

[0262] 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 set shielding plates 23 respectively 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.

[0263] In addition to being set on the image side of the front lens group G0, the baffle 23 can also be set on the object side of the front lens group G0. Specifically, the baffle 23 is set 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 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 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.

[0264] Figure 15a 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 short-focus state, and Figure 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 long-focus state. The optical paths of the first turning element 1 and the second turning element 3 in Figures 15a and 15b are both expanded and replaced by parallel flat plates. The main difference between the optical lens 10 shown in Figures 15a and 15b and the optical lens 10 shown in Figure 10 is that the second rear lens group G2 is constructed differently, as described below:

[0265] As shown in Figures 15a and 15b, the fifth lens element L22 comprises a positive lens element L221 and a negative lens element L222, spaced apart from each other. The combined optical power of the positive lens element L221 and the negative lens element L222 is negative. This arrangement is equivalent to splitting the fifth lens element L22 into the positive lens element L221 and the negative lens element L222. This increases the number of lens surfaces in the second rear lens group G2, providing greater design freedom for the second rear lens group G2 and facilitating correction of optical lens aberrations.

[0266] As shown in FIG. 15 a and FIG. 15 b , the positive lens L221 may be disposed between the fourth lens L21 and the negative lens L222 , but the present invention is not limited thereto. The negative lens L222 may be disposed between the positive lens L221 and the fourth lens L21 .

[0267] In some embodiments, as shown in Figures 15a and 15b, an air gap is provided 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 may also be other media, such as nitrogen, a glue layer, etc.

[0268] In some embodiments, as shown in Figures 15a and 15b , 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 object-to-image direction. By combining the lenses in the second front lens group G02 with positive and negative optical powers, positive and negative aberrations can be offset, thereby improving the imaging quality of the optical lens 10.

[0269] The optical lens 10 shown in FIG. 15 a and FIG. 15 b is described in detail below with reference to specific parameters and simulation results.

[0270] 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 each surface of the optical element 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 each surface of the optical element when the optical lens 10 in the seventh embodiment of the present application is in a long-focus state.

[0271] Table 1.1 Main parameters of the optical lens 10 in the seventh embodiment of the present application when in the short focus state

[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 positive lens L011, and S2 represents the image-side surface of positive lens L011. PRISM1 represents first inflection element 1, which is a prism and has a light-reflecting function. S3 represents first light-incident surface 11 of first inflection element 1, and S4 represents first light-exit surface 12 of first inflection element 1. S6 represents the object-side surface of first lens L11, and S9 represents the image-side surface of first lens L11. S10 represents the object-side surface of second lens L12, and S11 represents the image-side surface of second lens L12. S12 represents the object-side surface of third lens L13, and S13 represents the image-side surface of third lens L13. S14 represents the object-side surface of fourth lens L21, and S15 represents the image-side surface of fourth lens L21. S16 represents the object-side surface of positive lens L221, and S17 represents the image-side surface of positive lens L221. S18 represents the object-side surface of negative lens L222, and S19 represents the image-side surface of negative lens L222. PRISM2 represents second inflection element 3, which is a prism and has the function of bending light. S20 represents prism entrance surface 31 of second inflection element 3. S21 represents prism exit surface 32 of second inflection element 3. IRCF represents an infrared filter, S22 represents the object-side surface of the filter, and S23 represents the image-side surface of the filter. IMA represents image plane IMAGE, which can be the photosensitive surface of a 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 rules of the positive and negative signs in front of the thickness parameter are as follows: S n The 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 parameters are as follows: S n The vertex of the surface is the origin of the calculation. The center of the sphere is positive on the right and negative on the left. A curvature radius of 0.00E+00 means that the surface corresponding to this parameter is flat 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] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm.

[0279] S1 represents the object-side surface of positive lens L021, and S2 represents the image-side surface of positive lens L021. S3 represents the object-side surface of negative lens L022, and S4 represents the image-side surface of negative lens L022. PRISM1 represents first inflection element 1, which is a prism and has the function of bending light. S5 represents the first light-incident surface 11 of first inflection element 1, and S6 represents the first light-exiting surface 12 of first inflection element 1. S8 represents the object-side surface of first lens L11, and S9 represents the image-side surface of first lens L11. S10 represents the object-side surface of second lens L12, and S11 represents the image-side surface of second lens L12. S12 represents the object-side surface of third lens L13, and S13 represents the image-side surface of third lens L13. S14 represents the object-side surface of fourth lens L21, and S15 represents the image-side surface of fourth lens L21. S16 represents the object-side surface of positive lens L221, and S17 represents the image-side surface of positive lens L221. S18 represents the object-side surface of negative lens L222, and S19 represents the image-side surface of negative lens L222. PRISM2 represents second inflection element 3, which is a prism and has the function of bending light. S20 represents prism entrance surface 31 of second inflection element 3. S21 represents prism exit surface 32 of second inflection element 3. IRCF represents an infrared filter, S22 represents the object-side surface of the filter, and S23 represents the image-side surface of the filter. IMA represents image plane IMAGE, which can be the photosensitive surface of a photosensitive element.

[0280] In some embodiments, the aspheric surface in the optical lens 10 can be defined using the following aspheric curve equation:

[0281] Where z is the relative distance between a point r from the optical axis on the aspheric surface and the tangent plane on the optical axis of the aspheric surface; r is the vertical distance between a point on the aspheric 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.

[0282] 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 the short focus state

[0283] 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

[0284] As shown in Tables 1.5, 1.6, and 1.7, Table 1.5 shows the basic parameters of the optical path of the optical lens 10 in the short-focus state in the seventh embodiment of the present application, Table 1.6 shows the basic parameters of the optical path of the optical lens 10 in the long-focus state in the seventh embodiment of the present application, and Table 1.7 shows the relevant parameters and ξ values ​​of the optical lens 10 in the seventh embodiment of the present application;

[0285] 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

[0286] Table 1.6 Basic parameters of the optical path when the optical lens 10 is in the telephoto state in the seventh embodiment of the present application

[0287] 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)

[0288] In Tables 1.5 to 1.7, F1 is the first effective focal length of the optical lens 10; F2 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 the 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, β1 = f g011 / f g01 , β2 is the second focal length distribution ratio, β2=f g021 / f g02, α1 is the third focal length distribution ratio, α1=F1 / f g011 ; α2 is the fourth focal length distribution ratio, α2=F2 / f g021 ξ1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short-focus state, ξ2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the long-focus state; L is the movement distance of the first turning element 1 between the first position and the second position; coefficient k = [(β1-1) 2 / β1]-[(β2-1) 2 / β2].

[0289] Figure 15c shows the axial spherical aberration curve of the optical lens 10 in the seventh embodiment of the present application when in the short-focus state, and Figure 15d shows the field curvature curve and distortion curve of the optical lens 10 in the seventh embodiment of the present application when in the short-focus state. Figure 15e shows the axial spherical aberration curve of the optical lens 10 in the seventh embodiment of the present application when in the long-focus state, and Figure 15f shows the field curvature curve and distortion curve of the optical lens 10 in the seventh embodiment of the present application when in the long-focus state. Figures 15c to 15f show the axial spherical aberration curve, field curvature curve, and distortion curve corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm in the illustration).

[0290] The axial spherical aberration curve in the figure illustrates the deviation of light of corresponding wavelengths emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The abscissa represents the deviation along the optical axis, and the ordinate represents the normalized coordinate at the pupil. The deviation values ​​in Figures 15c and 15e are both small, indicating that the optical lens has well corrected axial spherical aberration.

[0291] The field curvature curves in the figure illustrate the deviation of the convergence point of beamlets at different fields of view from the ideal imaging plane. x represents the sagittal beam, and y represents the meridional beam. The abscissa represents the deviation along the optical axis, and the ordinate represents the corresponding field of view. Excessive field curvature in a particular field indicates poor image quality or the presence of higher-order aberrations. Figures 15d and 15f show that both directions exhibit minimal field curvature, indicating a good depth of focus.

[0292] The distortion curves in the figure illustrate the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. Figures 15d and 15f show relatively small deviations, ensuring no noticeable distortion in the image.

[0293] 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.

[0294] Figure 16a is a 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, and Figure 16b is a schematic diagram of the structure of the optical lens 10 in the eighth embodiment of the present application when it is in a long-focus state. The optical paths of the first turning element 1 and the second turning element 3 in Figures 16a and 16b are both expanded and replaced by parallel flat plates. The main difference between the optical lens 10 shown in Figures 16a and 16b and the optical lens 10 shown in Figure 10 is that the composition of the first rear lens group G1 is different, as described below:

[0295] As shown in Figures 16a and 16b, the second lens element L12 comprises a positive lens element L121 and a negative lens element L122, spaced apart from each other. The combined optical power of the positive lens element L121 and the negative lens element L122 is negative. This arrangement is equivalent to splitting the second lens element L12 into the positive lens element L121 and the negative lens element L122. This increases the number of lens surfaces in the first rear lens group G1, providing greater design freedom for the first rear lens group G1 and facilitating correction of optical lens aberrations.

[0296] As shown in FIG. 16 a and FIG. 16 b , 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 .

[0297] In some embodiments, as shown in Figures 16a and 16b, an air gap is provided 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 may also be other media, such as nitrogen, a glue layer, etc.

[0298] In some embodiments, as shown in Figures 16a and 16b , the first front lens group G01 includes a positive lens L011 and a negative lens L012 along the object-to-image direction; the second front lens group G02 includes a positive lens L021 and a negative lens L022 along the object-to-image direction. By combining the lenses in the second front lens group G02 with positive and negative power, positive and negative aberrations can be offset, thereby improving the imaging quality of the optical lens 10.

[0299] The optical lens 10 shown in FIG. 16 a and FIG. 16 b is described in detail below with reference to specific parameters and simulation results.

[0300] 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 the short-focus state, and Table 2.2 shows the main parameters of the optical lens 10 in the eighth embodiment of the present application when it is in the telephoto state; Table 2.3 shows the aspheric coefficients of each surface of the optical element when the optical lens 10 in the eighth embodiment of the present application is in the short-focus state; Table 2.4 shows the aspheric coefficients of each surface of the optical element when the optical lens 10 in the eighth embodiment of the present application is in the telephoto state.

[0301] Table 2.1 Main parameters of the optical lens 10 in the eighth embodiment of the present application when in the short focus state

[0302] 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 flat and the curvature radius is infinite.

[0303] S1 represents the object-side surface of positive lens L011, S2 represents the image-side surface of positive lens L011, S3 represents the object-side surface of negative lens L012, and S4 represents the image-side surface of negative lens L012. PRISM1 represents first inflection element 1, which is a prism and has the function of bending light. S5 represents the first light-incident surface 11 of first inflection element 1, and S6 represents the first light-exiting surface 12 of first inflection element 1. S7 represents the object-side surface of first lens L11, and S8 represents the image-side surface of first lens L11. S9 represents the object-side surface of positive lens L121, and S10 represents the image-side surface of positive lens L121. S11 represents the object-side surface of negative lens L122, and S12 represents the image-side surface of negative lens L122. S13 represents the object-side surface of third lens L13, S14 represents the image-side surface of third lens L13, S15 represents the object-side surface of fourth lens L21, S16 represents the image-side surface of fourth lens L21, S17 represents the object-side surface of fifth lens L22, and S18 represents the image-side surface of fifth lens L22. PRISM2 represents second inflection element 3, which is a prism and has the function of bending light. S19 represents prism entrance surface 31 of second inflection element 3. S20 represents prism exit surface 32 of second inflection element 3. IRCF represents an infrared filter, S21 represents the object-side surface of the filter, and S22 represents the image-side surface of the filter. IMA represents image plane IMAGE, which can be the photosensitive surface of a photosensitive element.

[0304] Table 2.2 Main parameters of the optical lens 10 in the eighth embodiment of the present application when in telephoto state

[0305] 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 flat and the curvature radius is infinite.

[0306] S1 represents the object-side surface of positive lens L021, S2 represents the image-side surface of positive lens L021, S3 represents the object-side surface of negative lens L022, and S4 represents the image-side surface of negative lens L022. PRISM1 represents first inflection element 1, which is a prism and has the function of bending light. S5 represents the first light-incident surface 11 of first inflection element 1, and S6 represents the first light-exiting surface 12 of first inflection element 1. S7 represents the object-side surface of first lens L11, and S8 represents the image-side surface of first lens L11. S9 represents the object-side surface of positive lens L121, and S10 represents the image-side surface of positive lens L121. S11 represents the object-side surface of negative lens L122, and S12 represents the image-side surface of 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 a light-reflecting function. S19 represents the prism entrance surface 31 of the second inflection element 3. S20 represents the prism exit surface 32 of the second inflection element 3. IRCF represents an infrared filter, S21 represents the object-side surface of the filter, and S22 represents the image-side surface of the filter. IMA represents the image plane IMAGE, which can be the photosensitive surface of a photosensitive element.

[0307] 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 the short focus state

[0308] 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

[0309] As shown in Tables 2.5, 2.6, and 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;

[0310] 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

[0311] 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

[0312] 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)

[0313] In Tables 2.5 to 2.7, F1 is the first effective focal length of the optical lens 10; F2 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 the 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, β1 = f g011 / f g01 , β2 is the second focal length distribution ratio, β2=f g021 / f g02 , α1 is the third focal length distribution ratio, α1=F1 / f g011 ; α2 is the fourth focal length distribution ratio, α2=F2 / f g021 ξ1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short-focus state, ξ2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the long-focus state; L is the movement distance of the first turning element 1 between the first position and the second position; coefficient k = [(β1-1)2 / β1]-[(β2-1) 2 / β2].

[0314] Figure 16c shows the 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 the short-focus state. Figure 16d shows the 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 the telephoto state. Figures 16c and 16d show the axial spherical aberration curve, field curvature curve, and distortion curve corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm in the illustration).

[0315] The axial spherical aberration curve in the figure illustrates the deviation of light of corresponding wavelengths emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The abscissa represents the deviation along the optical axis, and the ordinate represents the normalized coordinate at the pupil. The deviation values ​​in Figures 16c and 16d are both small, indicating that the optical lens has well corrected axial spherical aberration.

[0316] The field curvature curves in the figure illustrate the deviation of the convergence point of beamlets at different fields of view from the ideal imaging plane. x represents the sagittal beam, and y represents the meridional beam. The abscissa represents the deviation along the optical axis, and the ordinate represents the corresponding field of view. Excessive field curvature in a particular field indicates poor image quality or the presence of higher-order aberrations. Figures 16c and 16d show that both directions exhibit minimal field curvature, indicating a good depth of focus.

[0317] The distortion curves in the figure illustrate the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. The deviations shown in Figures 16c and 16d are relatively small, ensuring no noticeable distortion in the image.

[0318] 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.

[0319] Figure 17a is a schematic diagram of the structure of the optical lens 10 in the ninth embodiment of the present application when it is in a short-focus state, and Figure 17b is a schematic diagram of the structure of the optical lens 10 in the ninth embodiment of the present application when it is in a long-focus state. The optical paths of the first inflection element 1 and the second inflection element 3 in Figures 17a and 17b are both expanded and replaced by parallel flat plates. The main difference between the optical lens 10 shown in Figures 17a and 17b and the optical lens 10 shown in Figures 15a and 15b is that the specific parameters of the optical lens 10 are different;

[0320] The optical lens 10 shown in FIG. 17 a and FIG. 17 b is described in detail below in combination with specific parameters and simulation results.

[0321] 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 each surface of the optical element 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 each surface of the optical element when the optical lens 10 in the ninth embodiment of the present application is in a long-focus state.

[0322] Table 3.1 Main parameters of the optical lens 10 in the ninth embodiment of the present application when in a short-focus state

[0323] 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 flat and the curvature radius is infinite.

[0324] S1 represents the object-side surface of positive lens L011, S2 represents the image-side surface of positive lens L011, S3 represents the object-side surface of negative lens L012, and S4 represents the image-side surface of negative lens L012. PRISM1 represents first inflection element 1, which is a prism and has the function of bending light. S5 represents the first light-incident surface 11 of first inflection element 1, and S6 represents the first light-exiting surface 12 of first inflection element 1. S7 represents the object-side surface of first lens L11, and S8 represents the image-side surface of first lens L11. S9 represents the object-side surface of positive lens L121, and S10 represents the image-side surface of positive lens L121. S11 represents the object-side surface of negative lens L122, and S12 represents the image-side surface of negative lens L122. S13 represents the object-side surface of third lens L13, S14 represents the image-side surface of third lens L13, S15 represents the object-side surface of fourth lens L21, S16 represents the image-side surface of fourth lens L21, S17 represents the object-side surface of fifth lens L22, and S18 represents the image-side surface of fifth lens L22. PRISM2 represents second inflection element 3, which is a prism and has the function of bending light. S19 represents prism entrance surface 31 of second inflection element 3. S20 represents prism exit surface 32 of second inflection element 3. IRCF represents an infrared filter, S21 represents the object-side surface of the filter, and S22 represents the image-side surface of the filter. IMA represents image plane IMAGE, which can be the photosensitive surface of a photosensitive element.

[0325] Table 3.2 Main parameters of the optical lens 10 in the ninth embodiment of the present application when in telephoto state

[0326] 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 flat and the curvature radius is infinite.

[0327] S1 represents the object-side surface of positive lens L021, S2 represents the image-side surface of positive lens L021, S3 represents the object-side surface of negative lens L022, and S4 represents the image-side surface of negative lens L022. PRISM1 represents first inflection element 1, which is a prism and has the function of bending light. S5 represents the first light-incident surface 11 of first inflection element 1, and S6 represents the first light-exiting surface 12 of first inflection element 1. S7 represents the object-side surface of first lens L11, and S8 represents the image-side surface of first lens L11. S9 represents the object-side surface of positive lens L121, and S10 represents the image-side surface of positive lens L121. S11 represents the object-side surface of negative lens L122, and S12 represents the image-side surface of negative lens L122. S13 represents the object-side surface of third lens L13, S14 represents the image-side surface of third lens L13, S15 represents the object-side surface of fourth lens L21, S16 represents the image-side surface of fourth lens L21, S17 represents the object-side surface of fifth lens L22, and S18 represents the image-side surface of fifth lens L22. PRISM2 represents second inflection element 3, which is a prism and has the function of bending light. S19 represents prism entrance surface 31 of second inflection element 3. S20 represents prism exit surface 32 of second inflection element 3. IRCF represents an infrared filter, S21 represents the object-side surface of the filter, and S22 represents the image-side surface of the filter. IMA represents image plane IMAGE, which can be the photosensitive surface of a photosensitive element.

[0328] 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 the short focus state

[0329] 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

[0330] 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

[0331] 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

[0332] 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)

[0333] In Tables 3.5 to 3.7, F1 is the first effective focal length of the optical lens 10; F2 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 the 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, β1 = f g011 / f g01 , β2 is the second focal length distribution ratio, β2=f g021 / f g02 , α1 is the third focal length distribution ratio, α1=F1 / f g011 ; α2 is the fourth focal length distribution ratio, α2=F2 / f g021 ξ1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short-focus state, ξ2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the long-focus state; L is the movement distance of the first turning element 1 between the first position and the second position; coefficient k = [(β1-1) 2 / β1]-[(β2-1) 2 / β2].

[0334] Figure 17c shows the axial spherical aberration curve of the optical lens 10 in the ninth embodiment of the present application when in the short-focus state, and Figure 17d shows the field curvature curve and distortion curve of the optical lens 10 in the ninth embodiment of the present application when in the short-focus state. Figure 17e shows the axial spherical aberration curve of the optical lens 10 in the ninth embodiment of the present application when in the long-focus state, and Figure 17f shows the field curvature curve and distortion curve of the optical lens 10 in the ninth embodiment of the present application when in the long-focus state. Figures 17c to 17f show the axial spherical aberration curve, field curvature curve, and distortion curve corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm in the illustration).

[0335] The axial spherical aberration curve in the figure illustrates the deviation of light of corresponding wavelengths emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The abscissa represents the deviation along the optical axis, and the ordinate represents the normalized coordinate at the pupil. The deviation values ​​in Figures 17c and 17e are both small, indicating that the optical lens has well corrected axial spherical aberration.

[0336] The field curvature curves in the figure illustrate the deviation of the convergence point of beamlets at different fields of view from the ideal imaging plane. x represents the sagittal beam, and y represents the meridional beam. The abscissa represents the deviation along the optical axis, and the ordinate represents the corresponding field of view. Excessive field curvature in a particular field indicates poor image quality or the presence of higher-order aberrations. Figures 17d and 17f show that both directions exhibit minimal field curvature, indicating a good depth of focus.

[0337] The distortion curves in the figure illustrate the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. Figures 17d and 17f show relatively small deviations, ensuring no noticeable distortion in the image.

[0338] 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.

[0339] Figure 18a is a 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, and Figure 18b is a schematic diagram of the structure of the optical lens 10 in the tenth embodiment of the present application when it is in a long-focus state. The optical paths of the first inflection element 1 and the second inflection element 3 in Figures 18a and 18b are both expanded and replaced by parallel flat plates. The main difference between the optical lens 10 shown in Figures 18a and 18b and the optical lens 10 shown in Figures 15a and 15b is that the specific parameters of the optical lens 10 are different;

[0340] The optical lens 10 shown in FIG. 18 a and FIG. 18 b is described in detail below with reference to specific parameters and simulation results.

[0341] Table 4.1 Main parameters of the optical lens 10 in the tenth embodiment of the present application when in a short-focus state

[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 flat and the curvature radius is infinite.

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

[0344] Table 4.2 Main parameters of the optical lens 10 in the tenth embodiment of the present application when in telephoto state

[0345] 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 flat and the curvature radius is infinite.

[0346] S1 represents the object-side surface of positive lens L021, S2 represents the image-side surface of positive lens L021, S3 represents the object-side surface of negative lens L022, and S4 represents the image-side surface of negative lens L022. PRISM1 represents first inflection element 1, which is a prism and has the function of bending light. S5 represents the first light-incident surface 11 of first inflection element 1, and S6 represents the first light-exiting surface 12 of first inflection element 1. S7 represents the object-side surface of first lens L11, and S8 represents the image-side surface of first lens L11. S9 represents the object-side surface of positive lens L121, and S10 represents the image-side surface of positive lens L121. S11 represents the object-side surface of negative lens L122, and S12 represents the image-side surface of negative lens L122. S13 represents the object-side surface of third lens L13, S14 represents the image-side surface of third lens L13, S15 represents the object-side surface of fourth lens L21, S16 represents the image-side surface of fourth lens L21, S17 represents the object-side surface of fifth lens L22, and S18 represents the image-side surface of fifth lens L22. PRISM2 represents second inflection element 3, which is a prism and has the function of bending light. S19 represents prism entrance surface 31 of second inflection element 3. S20 represents prism exit surface 32 of second inflection element 3. IRCF represents an infrared filter, S21 represents the object-side surface of the filter, and S22 represents the image-side surface of the filter. IMA represents image plane IMAGE, which can be the photosensitive surface of a photosensitive element.

[0347] 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 the short focus state

[0348] 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

[0349] As shown in Tables 4.5, 4.6, and 4.7, Table 4.5 shows the basic parameters of the optical path of the optical lens 10 in the tenth embodiment of the present application when in the short-focus state, Table 4.6 shows the basic parameters of the optical path of the optical lens 10 in the tenth embodiment of the present application when in the long-focus state, and Table 4.7 shows the relevant parameters and ξ values ​​of the optical lens 10 in the tenth embodiment of the present application;

[0350] 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

[0351] 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

[0352] 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)

[0353] In Tables 4.5 to 4.7, F1 is the first effective focal length of the optical lens 10; F2 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 the 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, β1 = f g011 / f g01 , β2 is the second focal length distribution ratio, β2=f g021 / f g02 , α1 is the third focal length distribution ratio, α1=F1 / f g011 ; α2 is the fourth focal length distribution ratio, α2=F2 / f g021 ξ1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short-focus state, ξ2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the long-focus state; L is the movement distance of the first turning element 1 between the first position and the second position; coefficient k = [(β1-1) 2 / β1]-[(β2-1) 2 / β2].

[0354] Figure 18c is an axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens 10 in the tenth embodiment of the present application when in a short-focus state. Figure 18d is an axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens 10 in the tenth embodiment of the present application when in a long-focus state. Figures 18c and 18d show the axial spherical aberration curve, field curvature curve, and distortion curve corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm in the illustration).

[0355] The axial spherical aberration curve in the figure illustrates the deviation of light of corresponding wavelengths emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The abscissa represents the deviation along the optical axis, and the ordinate represents the normalized coordinate at the pupil. The deviation values ​​in Figures 18c and 18d are both small, indicating that the optical lens has well corrected axial spherical aberration.

[0356] The field curvature curves in the figure illustrate the deviation of the convergence point of beamlets from the ideal imaging plane at different fields of view. x represents the sagittal beam, and y represents the meridional beam. The abscissa represents the deviation along the optical axis, and the ordinate represents the corresponding field of view. Excessive field curvature in a particular field indicates poor image quality or the presence of higher-order aberrations. Figures 18c and 18d show that both directions exhibit minimal field curvature, indicating a good depth of focus.

[0357] The distortion curves in the figure illustrate the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. The deviations shown in Figures 18c and 18d are relatively small, ensuring no noticeable distortion in the image.

[0358] 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.

[0359] Figure 19a is a 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, and Figure 19b is a schematic diagram of the structure of the optical lens 10 in the eleventh embodiment of the present application when it is in a long-focus state. The optical paths of the first inflection element 1 and the second inflection element 3 in Figures 19a and 19b are both expanded and replaced by parallel flat plates. The main difference between the optical lens 10 shown in Figures 19a and 19b and the optical lens 10 shown in Figures 15a and 15b is that the optical power configuration of each lens in the second rear lens group G2 is different, as described below:

[0360] As shown in Figures 19a and 19b, the fifth lens element L22 comprises two spaced-apart negative lenses, namely, negative lens L221 and negative lens L222. This arrangement is equivalent to splitting the fifth lens element L22 into negative lens L221 and negative lens L222. This increases the number of lens surfaces in the second rear lens group G2, providing greater freedom in the design of the second rear lens group G2 and facilitating correction of optical lens aberrations.

[0361] The optical lens 10 shown in FIG. 19 a and FIG. 19 b is described in detail below in combination with specific parameters and simulation results.

[0362] 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 the 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 the telephoto state; Table 5.3 shows the aspheric coefficients of each surface of the optical element when the optical lens 10 in the eleventh embodiment of the present application is in the short-focus state; Table 5.4 shows the aspheric coefficients of each surface of the optical element when the optical lens 10 in the eleventh embodiment of the present application is in the telephoto state.

[0363] Table 5.1 Main parameters of the optical lens 10 in the eleventh embodiment of the present application when in the short focus state

[0364] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm.

[0365] STO stands for stop (STOP), which limits the size of the clear aperture through which light enters the optical system and affects the amount of light entering the optical system. STO is located on the object side of positive lens L01. S2 represents the object-side surface of positive lens L011, and S3 represents the image-side surface of positive lens L011. PRISM1 represents first inflection element 1, which is a prism and has the function of bending light. S4 represents the first light-entering surface 11 of first inflection element 1, and S6 represents the first light-exiting surface 12 of first inflection element 1. S7 represents the object-side surface of first lens L11, and S8 represents the image-side surface of first lens L11. S9 represents the object-side surface of second lens L12, and S10 represents the image-side surface of second lens L12. S11 represents the object-side surface of third lens L13, and S12 represents the image-side surface of third lens L13. S13 represents the object-side surface of fourth lens L21, and S14 represents the image-side surface of fourth lens L21. S15 represents the object-side surface of negative lens L221, and S16 represents the image-side surface of negative lens L221. S17 represents the object-side surface of negative lens L222, and S18 represents the image-side surface of negative lens L222. PRISM2 represents the second inflection element 3, which is a prism and has light-reflecting function. 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 represents the object-side surface of the filter, and S22 represents the image-side surface of the filter. IMA represents the image plane IMAGE, which can be the photosensitive surface of a photosensitive element.

[0366] Table 5.2 Main parameters of the optical lens 10 in the eleventh embodiment of the present application when in the telephoto state

[0367] The unit of the parameter values ​​of curvature radius, thickness and light transmission radius in the table is mm.

[0368] STO stands for aperture (STOP), which limits the size of the clear aperture through which light enters, affecting the amount of light entering the optical system. STO is located on the object side of positive lens L01. S2 represents the object-side surface of positive lens L021, and S3 represents the image-side surface of positive lens L021. S4 represents the object-side surface of negative lens L022, and S5 represents the image-side surface of negative lens L022. PRISM1 represents first inflection element 1, which is a prism and has the function of bending light. S6 represents the first light-entering surface 11 of first inflection element 1, and S7 represents the first light-exiting surface 12 of first inflection element 1. S8 represents the object-side surface of first lens L11, and S9 represents the image-side surface of first lens L11. S10 represents the object-side surface of second lens L12, and S11 represents the image-side surface of second lens L12. S12 represents the object-side surface of third lens L13, and S13 represents the image-side surface of third lens L13. S14 represents the object-side surface of fourth lens L21, and S15 represents the image-side surface of fourth lens L21. S16 represents the object-side surface of negative lens L221, and S17 represents the image-side surface of negative lens L221. S18 represents the object-side surface of negative lens L222, and S19 represents the image-side surface of negative lens L222. PRISM2 represents second inflection element 3, which is a prism and has the function of bending light. S20 represents the prism entrance surface 31 of second inflection element 3. S21 represents the prism exit surface 32 of second inflection element 3. IRCF represents an infrared filter, S22 represents the object-side surface of the filter, and S23 represents the image-side surface of the filter. IMA represents image plane IMAGE, which can be the photosensitive surface of a photosensitive element.

[0369] 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 the short focus state

[0370] 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

[0371] 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 the 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 the 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.

[0372] 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

[0373] 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

[0374] 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)

[0375] In Tables 5.5 to 5.7, F1 is the first effective focal length of the optical lens 10; F2 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 the 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, β2 is the second focal length distribution ratio, α1 is the third focal length distribution ratio, α1=F1 / f g011 ; α2 is the fourth focal length distribution ratio, α2=F2 / f g021 ξ1 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the short-focus state, ξ2 is the stroke compression ratio coefficient of the first rear lens group G1 when the optical lens 10 is in the long-focus state; L is the movement distance of the first turning element 1 between the first position and the second position; coefficient k = [(β1-1) 2 / β1]-[(β2-1) 2 / β2].

[0376] Figure 19c is an axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens 10 in the eleventh embodiment of the present application when in a short-focus state. Figure 19d is an axial spherical aberration curve, a field curvature curve, and a distortion curve of the optical lens 10 in the eleventh embodiment of the present application when in a long-focus state. Figures 19c and 19d show the axial spherical aberration curve, field curvature curve, and distortion curve corresponding to different wavelength bands of the system (including 650nm, 610nm, 555nm, 510nm, 470nm, and 435nm in the figure).

[0377] The axial spherical aberration curve in the figure illustrates the deviation of light of corresponding wavelengths emitted at a 0-degree field of view from the ideal image point after passing through the optical system. The abscissa represents the deviation along the optical axis, and the ordinate represents the normalized coordinate at the pupil. The deviation values ​​in Figures 19c and 19d are both small, indicating that the optical lens has well corrected axial spherical aberration.

[0378] The field curvature curves in the figure illustrate the deviation of the convergence point of beamlets at different fields of view from the ideal imaging plane. x represents the sagittal beam, and y represents the meridional beam. The abscissa represents the deviation along the optical axis, and the ordinate represents the corresponding field of view. Excessive field curvature in a particular field indicates poor image quality or the presence of higher-order aberrations. Figures 19c and 19d show that both directions exhibit minimal field curvature, indicating a good depth of focus.

[0379] The distortion curves in the figure illustrate the relative deviation between the beam convergence point (actual image height) and the ideal image height for different fields of view. Figures 19c and 19d show relatively small deviations, ensuring no noticeable distortion in the image.

[0380] 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.

[0381] The types of hatching in the drawings of this application are for the purpose of distinguishing different components and should not be understood as limiting the materials of the components. The drawings of this application are for the purpose of illustrating the structural composition and are not shown to scale with the actual product.

[0382] 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 these embodiments. On the contrary, the purpose of introducing the application in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of this application. In order to provide an in-depth understanding of this application, the following description will contain many specific details. 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 unless there is a conflict.

[0383] In the embodiments of this application, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," "fourth," or "fifth" may explicitly or implicitly include one or more of the features.

[0384] In the embodiments of this application, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0385] 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 "up", "down", "left", "right", "inside", "outside", etc., are only reference to the 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.

[0386] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0387] 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 them. 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. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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), wherein the first direction (X) is 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 on 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 on 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, wherein: When the first turning element (1) is located at the first position, the total length of the optical system composed of 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 composed of 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, wherein: 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 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, wherein: 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 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, wherein: TTL1 and TTL2 meet the following requirements: TTL2-TTL1≥8.1mm.

7. The optical lens according to any one of claims 1 to 6, wherein: 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 satisfy: 4.5mm≤|f g02 -f g01 |≤12.9mm。 8. The optical lens according to any one of claims 1 to 7, wherein: The effective focal length f of the second front lens group (G02) 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, wherein: 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, wherein: 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, wherein: 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 is movable 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 shielding plate (23) is arranged on the object side of the front lens group (G0) and is movable 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 object 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 object side of the first front lens group (G01).

12. The optical lens according to any one of claims 1 to 11, wherein: 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, wherein: 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) 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) 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) 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) 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, wherein: 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, wherein: 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, wherein: 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 having positive refractive power, the second lens (L12) having negative refractive power, and a gap between adjacent two 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, wherein: The second lens (L12) includes a positive lens and a negative lens that are spaced apart.

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, wherein: 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 at an angle 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 housing and the camera module (100) described in claim 22, wherein the camera module (100) is mounted on the housing (200).

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