Lens, camera module and electronic equipment

Abstract

The invention provides a lens, a camera module and electronic equipment, relates to the technical field of optics, and aims to solve the problem that the telephoto ratio of the lens is small. The lens provided by the invention comprises a first lens group, a first prism, a second lens group, a second prism, a third lens group and a third prism which are sequentially arranged from an object side to an image side, the first lens group has orthogonal focal power, and a first surface of the first prism is used for reflecting a light beam and transmitting the light beam to the second lens group; the second lens group has negative focal power, the second prism has at least two second surfaces, and the second surfaces are used for reflecting the light beam and transmitting the light beam to the third lens group; the third lens group has negative focal power, the third prism is provided with at least three third surfaces, and the third surfaces are used for reflecting the light beams and then transmitting the light beams outwards; the first surface is parallel to the first direction, the second surface and the third surface are parallel to the second direction, and the first direction is perpendicular to the second direction. According to the lens provided by the invention, a large telephoto ratio and miniaturization in size can be realized.

Description

Technical Field

[0001] This application relates to the field of optical technology, and more particularly to a lens, camera module, and electronic device. Background Technology

[0002] Currently, camera modules have become an essential component of electronic devices such as smartphones and tablets. Users can easily capture desired images through these modules, fulfilling their needs for taking photos and videos. Therefore, designing camera modules to enhance the user experience has become a crucial topic in the industry.

[0003] Telephoto lenses can effectively enhance the user's telephoto photography experience, improving clarity when shooting distant scenes and enhancing low-light shooting. However, current telephoto lenses suffer from a relatively small focal length ratio, resulting in excessively large lenses that are unsuitable for use in compact electronic devices such as smartphones and tablets. Therefore, improving the focal length ratio of lenses has become a pressing technical challenge. Summary of the Invention

[0004] This application provides a lens, camera module, and electronic device with a large field of view, which facilitates miniaturization design.

[0005] In a first aspect, this application provides a lens comprising a first lens group, a first prism, a second lens group, a second prism, a third lens group, and a third prism arranged sequentially from the object side to the image side. The first lens group has orthogonal optical power and is used to converge an object-side light beam before transmitting it to the first prism. The first prism has a first surface used to refract the light beam before transmitting it to the second lens group. The second lens group has negative optical power and is used to diverge the light beam before transmitting it to the second prism. The second prism has at least two second surfaces used to sequentially refract the light beam before transmitting it to the third lens group. The third lens group has negative optical power and is used to diverge the light beam before transmitting it to the third prism. The third prism has at least three third surfaces used to sequentially refract the light beam outwards. The first surface is parallel to a first direction, the second and third surfaces are both parallel to a second direction, and the first and second directions are perpendicular to each other.

[0006] In the lens provided in this application, a large focal length ratio can be achieved by employing a first lens group, a second lens group, and a third lens group, and by rationally matching the positive and negative optical powers of each lens group. In addition, combining the first prism, the second prism, and the third prism can effectively reduce the physical length of the lens, which is beneficial for achieving a large focal length ratio and a miniaturized design.

[0007] In one example, the optical axis of the second lens group is parallel to a third direction. The third direction is perpendicular to both the first and second directions. That is, the first, second, and third surfaces can deflect the light beam in a plane perpendicular to the third direction, which helps to reduce the length of the lens in the third direction and can also increase the lens's telephoto ratio.

[0008] In one example, the optical axis of the third lens group forms an angle with the optical axis of the second lens group. This helps to reduce the length dimension of the lens (i.e., the dimension in the third direction) and ensures that the second prism has a larger size to provide more reflective surfaces.

[0009] In one example, the optical axis of the first lens group is perpendicular to the optical axes of the second and third lens groups. Alternatively, it can be understood that the lens can be configured in a periscope style, allowing the lens size to be used efficiently in all three directions. This helps to reduce the size of the lens in any single direction, which is beneficial for miniaturizing the lens design.

[0010] In one example, the second prism includes a first incident surface and a first exit surface. At least two second surfaces of the second prism include a first reflecting surface, and the first reflecting surface and the first exit surface are the same surface of the second prism.

[0011] In a specific configuration, the angle θ1 between the first incident surface and the first exit surface satisfies: 40°≤θ1≤60°, so that the first reflecting surface is a total reflection surface, that is, the light beam can achieve total reflection when passing through the first reflecting surface.

[0012] In the specific configuration, the refractive index N1 of the second prism satisfies the following: This makes the first reflecting surface a total reflection surface. In addition, by properly matching the angle between the first incident surface and the first exit surface and the refractive index of the second prism, it is also helpful to reduce the size of the second prism, which is beneficial to achieving lens miniaturization and a higher field of view ratio.

[0013] In a specific configuration, at least two surfaces of the second prism also include a second reflecting surface, with an angle of θ2 between the second reflecting surface and the first exiting surface, where θ1 = 2*θ2, so that the light reflected from the second reflecting surface can pass through the first exiting surface perpendicularly, thereby improving the beam quality and avoiding adverse problems such as chromatic aberration.

[0014] In one example, the first incident surface faces the second group of mirrors, and the first exit surface faces the third group of mirrors. The light beam passing through the first incident surface passes through the first reflecting surface and the second reflecting surface respectively before exiting through the first exit surface, so as to improve the quality of the light beam and avoid adverse problems such as chromatic aberration.

[0015] In specific settings, the first incident surface is perpendicular to the optical axis of the second mirror group in order to improve beam quality and avoid adverse problems such as chromatic aberration.

[0016] In specific settings, the first exit surface is perpendicular to the optical axis of the third mirror group in order to improve beam quality and avoid problems such as chromatic aberration.

[0017] In one example, the third prism includes a second incident surface and a second exit surface. The second prism has at least three third surfaces, including a third reflecting surface, which is the same surface as the second exit surface.

[0018] In a specific configuration, the angle θ3 between the second incident surface and the second exit surface satisfies: 40°≤θ3≤60°, so that the third reflecting surface is a total reflection surface, that is, the light beam can achieve total reflection when passing through the third reflecting surface.

[0019] In specific configurations, the refractive index N2 of the second prism satisfies the following conditions: This makes the third reflecting surface a total reflection surface. In addition, by properly matching the angle between the second incident surface and the second exit surface and the refractive index of the third prism, it is also helpful to reduce the size of the third prism, which is beneficial to achieving lens miniaturization and a higher field of view ratio.

[0020] In one example, the third prism includes a second incident surface and a second exit surface, with an angle of θ3 between the second incident surface and the second exit surface, where θ1 and θ3 are equal, in order to effectively reduce the length of the lens.

[0021] In one example, the third prism also includes a fourth reflecting surface among its at least three third surfaces, and the fourth reflecting surface and the second incident surface are the same surface of the third prism.

[0022] In a specific configuration, the third prism includes a fifth reflecting surface among its at least three surfaces. The angle between the fifth reflecting surface and the second exiting surface is equal to the angle between the fifth reflecting surface and the second incident surface, so that the fourth reflecting surface is a total reflection surface, meaning that the light beam can achieve total internal reflection when passing through the fourth reflecting surface.

[0023] In one example, the second incident surface faces the third group of mirrors. The light beam passing through the second incident surface passes through the third, fifth, and fourth reflecting surfaces before exiting through the second exit surface. That is, the light beam is reflected three times in the third prism before exiting, which effectively increases the propagation path of the light beam.

[0024] In one example, the second incident surface is perpendicular to the optical axis of the third mirror group.

[0025] In specific configuration, the first prism is a right-angle prism, which gives the first prism a better deflection effect on the light beam and has advantages such as small size.

[0026] In one example, the lens also includes a fourth prism located on the image side of the third prism. The fourth prism is either a right-angle prism or a Schmidt prism. Configuring the fourth prism can further enhance the beam propagation path and allows for flexible adjustment of the beam transmission direction, thus improving the lens's design flexibility.

[0027] In one example, the second lens group can move along its optical axis, enabling the lens to have a focal length adjustment function, which can improve the focusing effect of the lens at different focal lengths.

[0028] Secondly, this application provides a camera module, including a photosensitive element and any of the aforementioned lenses, wherein the photosensitive element is disposed on the image side of the lens. By equipping the camera module with the aforementioned lens, it achieves a high field-to-view ratio and has the advantage of a small size.

[0029] Thirdly, this application provides an electronic device, including a housing and the aforementioned camera module, the camera module being disposed within the housing. By equipping the electronic device with the aforementioned camera module, the electronic device possesses better long-distance shooting performance, and it also facilitates the realization of a thinner and smaller design for the electronic device. Attached Figure Description

[0030] Figure 1 A schematic diagram of the back structure of a mobile phone provided in an embodiment of this application;

[0031] Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure along the central AA direction;

[0032] Figure 3 A schematic diagram of the structure of a lens provided in an embodiment of this application;

[0033] Figure 4 A schematic diagram of a lens provided for an embodiment of this application;

[0034] Figure 5 A schematic diagram of another lens provided in an embodiment of this application;

[0035] Figure 6 A schematic diagram of the structure of a lens provided in an embodiment of this application;

[0036] Figure 7 This is a structural schematic diagram of a lens from another perspective, provided in an embodiment of this application.

[0037] Figure 8 for Figure 7 A schematic diagram of the structure of the second prism in the diagram;

[0038] Figure 9 for Figure 7A schematic diagram of the structure of the third prism in the diagram;

[0039] Figure 10 This is a schematic diagram of another lens structure provided in an embodiment of this application;

[0040] Figure 11 This is a structural schematic diagram of another lens from another perspective provided in an embodiment of this application;

[0041] Figure 12 A schematic diagram of the MTF curve of a lens provided in an embodiment of this application;

[0042] Figure 13 This is a schematic diagram of another MTF curve of a lens provided in an embodiment of this application;

[0043] Figure 14 This is a schematic diagram of another lens structure provided in an embodiment of this application;

[0044] Figure 15 This is a schematic diagram of another lens structure provided in an embodiment of this application. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0046] To facilitate understanding of the lens and lens module provided in the embodiments of this application, their application scenarios will be introduced first below.

[0047] The lens and camera module provided in this application embodiment can be applied to electronic devices with shooting functions, such as cameras, mobile phones, tablets, laptops, and wearable devices (e.g., smartwatches). The following description uses a mobile phone as an example. When the lens and camera module are applied to other types of electronic devices, the settings of the lens and camera module can be the same or similar to those in the mobile phone embodiment, and will not be repeated here.

[0048] Figure 1 The image shows a schematic diagram of the back of the phone. Figure 2 It shows Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0049] For details, please refer to the following: Figure 1 and Figure 2The mobile phone includes a housing 01, a display screen 02, and a camera module 100. The housing 01 may include a mid-frame 011 and a back cover 012. The display screen 02 and the back cover 012 are respectively mounted on opposite sides of the mid-frame 011, and the back cover 012 and the mid-frame 011 can form a space for accommodating the camera module 100. The light-receiving side (or object side) of the camera module 100 is positioned opposite to the camera window 0121 provided on the back cover 012 to ensure that the camera module 100 can receive light emitted or reflected by the subject outside the housing 01.

[0050] The camera window 0121 has a protective cover 0122 at its opening. The protective cover 0122 is typically made of materials with good light transmittance and structural strength, such as glass or sapphire. The protective cover 0122 ensures the airtightness of the camera window 0121, preventing external dust and other impurities from entering the housing 01 and damaging the camera module 100 and other components inside the housing 01.

[0051] The space enclosed by the display screen 02 and the middle frame 011 can be used to accommodate components such as the circuit board 03 and the processor (not shown in the figure).

[0052] The camera module 100 includes a lens 10 and a photosensitive element 101. The lens 10 includes multiple lenses, enabling it to converge, diverge, or refract light beams. The photosensitive element 101 is located on the light-emitting side (or image side) of the lens 10, and its photosensitive surface coincides with the focal plane of the lens 10. The photosensitive element 101, also known as an image sensor, is a semiconductor chip used to convert light signals into electrical signals. The photosensitive surface of the photosensitive element 101 contains hundreds of thousands to millions of photodiodes, which generate electrical charges when exposed to light. The photosensitive element 101 can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) device; this application does not limit the specific type of the photosensitive element 101.

[0053] In practical applications, external light beams can be converged, diverged, or refracted by the lens 10 before being transmitted to the photosensitive surface of the photosensitive element 101. The photosensitive element 101 converts the light signal into an electrical signal and transmits it to the processor, which can process and store the electrical signal. Alternatively, the processor can transmit the electrical signal to the display screen 02 for display. This application does not limit the specific processing method of the electrical signal.

[0054] The camera module 100 in this embodiment can be installed in the upper left corner, upper middle, or upper right corner of the back of the mobile phone, without specific limitations. In addition to being installed on the back of the mobile phone as a rear camera module, the camera module 100 can also be installed on the front of the mobile phone as a front camera module.

[0055] In summary, in practical applications, a mobile phone may include one or more camera modules 100. Alternatively, a camera module 100 may include one or more lenses 10, and the photosensitive element 101 may be multiple or a single element. Furthermore, the camera module 100 or the lens 10 may be located on the back or front of the mobile phone. In specific configurations, the configuration method, number, and position of the camera module 100 can be reasonably selected according to actual needs, and this application does not impose any limitations in this regard.

[0056] Telephoto lenses have a longer focal length, which can effectively improve the sharpness when shooting distant scenes. Therefore, more and more mobile phones are now equipped with telephoto lenses to achieve better performance in shooting distant scenes.

[0057] Current telephoto lenses suffer from a relatively small telephoto ratio, resulting in an excessively large lens size that is unsuitable for use in space-constrained electronic devices such as mobile phones and tablets.

[0058] Therefore, embodiments of this application provide a lens with a large field-to-view ratio, which is beneficial for achieving miniaturization design.

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] like Figure 3As shown, in one example provided in this application, the camera module 100 includes a lens 10 and a photosensitive element 101. The lens 10 includes a first lens group 11, a first prism 12, a second lens group 13, a second prism 14, a third lens group 15, and a third prism 16 arranged sequentially from the object side to the image side. The first lens group 11 has orthogonal optical power and is used to converge the light beam from the object side and transmit it to the first prism 12. The first prism 12 is used to refract the light beam and transmit it to the second lens group 13. The second lens group 13 has negative optical power and is used to diverge the light beam and transmit it to the second prism 14. The second prism 14 is used to refract the light beam and transmit it to the third lens group 15. The third lens group 15 has negative optical power and is used to diverge the light beam and transmit it to the third prism 16. The third prism 16 is used to refract the light beam and transmit it to the photosensitive surface of the photosensitive element 101. The lens group in lens 10 is mainly used to converge and diverge the light beam, thereby optimizing the beam quality. The prism is mainly used to refract the light beam, thereby changing its propagation direction. In addition, the light beam can undergo at least one reflection within the prism, which increases the propagation path of the light beam and helps to reduce the size of lens 10. The photosensitive element 101 is used to convert the light signal carrying image information into an electrical signal, so as to facilitate the processing, storage, and transmission of the image information.

[0061] In the example provided in this application, by employing a first lens group 11, a second lens group 13, and a third lens group 15, and by rationally matching the positive and negative optical powers of each lens group, a large focal length ratio can be achieved. In addition, combining the first prism 12, the second prism 14, and the third prism 16 can effectively reduce the physical length of the lens 10, which is beneficial for achieving a large focal length ratio and a miniaturized design of the lens 10.

[0062] To facilitate understanding, some technical terms of lens 10 will be explained and described below.

[0063] Optical power, expressed as the reciprocal of the image-side focal length (approximately assuming the refractive index of air is 1), characterizes a lens's ability to deflect light by 10 decimal places. Lenses or lens groups with positive optical power have a positive focal length and converge beams of light. Lenses or lens groups with negative optical power diverge beams of light.

[0064] A positive lens, also known as a converging lens or convex lens, has the function of converging light beams. Convex lenses are classified into biconvex, plano-convex, and concave-convex types.

[0065] A negative lens, also known as a diverging lens or concave lens, has the effect of diverging light. Concave lenses are classified into biconcave, plano-concave, and convex-concave types.

[0066] For example, such as Figure 3As shown in the example provided in this application, the first lens group 11 includes a positive lens. In practical applications, the positive lens in the first lens group 11 can be any type of positive lens described above. Alternatively, the first lens group 11 may also include multiple lenses, which may include both positive and negative lenses. That is, when the first lens group 11 includes multiple lenses, the multiple lenses can together form a lens group with positive optical power.

[0067] The second lens group 13 includes two negative lenses, namely negative lens 131 and negative lens 132. In practical applications, the negative lenses in the second lens group 13 can be any type of negative lens mentioned above. Alternatively, the second lens group 13 may also include one or more lenses, which may include both positive and negative lenses. That is, when the second lens group 13 includes multiple lenses, the multiple lenses can together form a lens group with negative optical power.

[0068] The third lens group 15 includes two negative lenses, namely negative lens 151 and negative lens 152. In practical applications, the negative lenses in the third lens group 15 can be any type of negative lens mentioned above. Alternatively, the third lens group 15 may also include one or more lenses, which may include both positive and negative lenses. That is, when the third lens group 15 includes multiple lenses, the multiple lenses can together form a lens group with negative optical power.

[0069] In summary, in practical applications, the number and type of lenses contained in the first lens group 11, the second lens group 13, and the third lens group 14 can be reasonably set according to actual needs, so that the first lens group 11 has positive optical power, the second lens group 13 has negative optical power, and the third lens group 14 has negative optical power, which will not be elaborated here.

[0070] The optical axis refers to the axis of symmetry of an optical system. For example, the optical axis 110 of the first lens group 11 is the axis that passes through the center of each lens of the first lens group 11.

[0071] 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. Image-side focal length is the distance from the image-side principal plane to the image-side focal point; similarly, object-side focal length is the distance from the object-side principal plane to the object-side focal point. Unless otherwise specified, the focal length in the embodiments of this application refers to the image-side focal length.

[0072] The image plane is located on the image side of all the mirror groups and prisms in lens 10, and is the position where light rays pass through each mirror group and prism in lens 10 in sequence to form an image.

[0073] Total track length (TTL) refers to the optical path length from the surface of lens 10 closest to the object side to the image plane.

[0074] Focusing specifically refers to adjusting the position of the lens group in the lens 10 to control the image distance, so that the image plane of the lens 10 falls on the photosensitive element 101, so that the image of the camera module 100 is as clear as possible.

[0075] Internal focusing (IF) refers to the process where, during focusing, a focusing lens group inside the optical lens 10 moves to achieve focusing, while the total length (TTL) of the optical lens 10 remains constant.

[0076] In the example provided in this application, the second lens group 13 can move along its optical axis 130 to achieve the aforementioned focusing effect. It is understood that, in specific settings, the second lens group 13 can be moved using a driving device such as a voice coil motor. In specific settings, the focusing effect can be achieved according to currently commonly used structures and methods, which will not be elaborated upon here.

[0077] Effective focal length (EFFL) refers to the length of the optical path from the point of convergence of the lens to the principal plane. The principal plane is the plane where the backward extension of the outgoing light intersects with the incident light, and this plane is perpendicular to the optical axis.

[0078] The telephoto ratio refers to the ratio of the effective focal length to the total focal length, or EFFL / TTL. The telephoto ratio is an important indicator of the telephoto performance of an optical system. The higher the telephoto ratio, the stronger the lens's telephoto capability, enabling it to capture objects at greater distances.

[0079] For example, such as Figure 4 As shown, in one example provided in this application, the lens 10 includes two lenses, G0 and G1. Lens G0 has positive optical power, and lens G1 has negative optical power. In the figure, the dotted line represents the optical axis of the lens 10. A beam S0 parallel to the optical axis is converged by lens G0 and then transmitted as beam S1. Beam S1 is diverged by lens G1 and then transmitted as beam S2, finally reaching the image plane IMA.

[0080] exist Figure 4 In this context, TTL represents the total length of lens 10. In the above definition of effective focal length, beam S0 can be considered the incident light, and beam S2 can be considered the outgoing light. The intersection of S2 and the optical axis is the convergence point of the lens. The dashed line represents the backward extension of beam S2, and the plane perpendicular to the optical axis where this backward extension intersects with beam S0 is the principal plane.

[0081] like Figure 5As shown, in another example provided in this application, the lens 10 includes three lenses: G0, G1, and G2. Lens G0 has positive optical power, lens G1 has negative optical power, and lens G2 has negative optical power. In the figure, the dotted line represents the optical axis of the lens 10. A beam S0 parallel to the optical axis is converged by lens G0 and then transmitted as beam S1. Beam S1 is diverged by lens G1 and then transmitted as beam S2. Beam S2 is diverged by lens G2 and then transmitted as beam S3, finally reaching the image plane IMA.

[0082] exist Figure 5 In the diagram, TTL represents the total length of lens 10. The dashed line is the backward extension of beam S3, and the intersection of this backward extension with beam S0 indicates the focusing position of lens 10. Therefore, EFFL is the effective focal length of lens 10.

[0083] By comparison Figure 4 and Figure 5 It is obvious that Figure 5 The field of view of the medium lens 10 is significantly greater than that of EFFL / TTL. Figure 4 The 10-lens camera has a greater shooting range than EFFL / TTL.

[0084] like Figure 3 As shown in the example provided in this application, the lens 10 includes a first lens group 11, a second lens group 13, and a third lens group 15 arranged sequentially from the object side to the image side. The first lens group 11 has positive optical power, the second lens group 13 has negative optical power, and the third lens group 15 has negative optical power. This gives the lens 10 a large telephoto ratio and strong telephoto capability, enabling it to capture objects at greater distances.

[0085] In addition, in the example provided in this application, configuring the first prism 12, the second prism 14 and the third prism 16 also helps to reduce the size of the lens 10 and the camera module 100, which is beneficial to achieving a large field-to-view ratio and miniaturized design of the lens 10.

[0086] For ease of understanding, the following example will use a spatial rectangular coordinate system to illustrate the spatial positions of the components in the lens 10.

[0087] like Figure 1 and Figure 2 and Figure 3 As shown, the length direction of the phone is consistent with the Y-axis (or third direction), the width direction is consistent with the X-axis (or first direction), and the thickness direction is consistent with the Z-axis (second direction).

[0088] To achieve a better user experience, current mobile phones are typically quite thin, resulting in limited space inside the phone along the Z-axis.

[0089] In the example provided in this application, the optical axis 110 of the first mirror group 11 is aligned with the Z-axis, enabling external light beams to be effectively transmitted to the first mirror group 11. Furthermore, by configuring the first prism 12, the light beam transmitted through the first mirror group 11 can be refracted by approximately 90°, allowing the light beam to propagate within the XOY plane perpendicular to the Z-axis.

[0090] For details, please refer to the following: Figure 6 and Figure 7 The first prism 12 has an incident surface 121, a reflecting surface 122 (or first surface), and an exit surface 123. The optical axis 110 of the first mirror group 11 is aligned with the Z-axis, and the optical axis 130 of the second mirror group 13 is aligned with the Y-axis; that is, the optical axes 110 of the first mirror group 11 and 130 of the second mirror group 13 are perpendicular to each other. Specifically, the first prism 12 is a right-angle prism. The angle between the incident surface 121 and the exit surface 123 is 90°. Furthermore, to achieve total internal reflection by the reflecting surface 122 and to ensure that the light beam can pass through perpendicularly to the exit surface 123, the angle between the reflecting surface 122 and both the incident surface 121 and the exit surface 123 is 45°.

[0091] Furthermore, to ensure that the light beam passing through the first mirror group 11 enters the first prism 12 perpendicularly to the incident surface 121, the incident surface 121 faces the first mirror group 11, and the incident surface 121 is perpendicular to the optical axis 110 of the first mirror group 11 to prevent chromatic aberration and other defects. Correspondingly, to ensure that the light beam passing through the first prism 12 can be effectively transmitted to the second mirror group 13, the exit surface 123 is perpendicular to the optical axis 130 of the second mirror group 13 to prevent chromatic aberration and other defects.

[0092] In summary, in the example provided in this application, by equipping the first prism 12, the light beam can be effectively transmitted from the first lens group 11 to the second lens group 13. Furthermore, the optical axis 110 of the first lens group 11 is aligned with the Z-axis, thus enabling effective utilization of a larger area of ​​the back panel in the mobile phone. This helps to increase the light-receiving area of ​​the first lens group 11, thereby ensuring the amount of light received by the lens 10. Additionally, the optical axis 130 of the second lens group 13 is perpendicular to the Z-axis, allowing the lens 10 to effectively utilize the length and width dimensions of the mobile phone, facilitating the efficient configuration of the lens 10 within the phone.

[0093] like Figure 7As shown, the light beam is diffused by the second mirror group 13 and then transmitted to the second prism 14. The second prism 14 has multiple second surfaces for reflecting the light beam. These second surfaces effectively improve the path of the light beam propagation within the second prism 14, thereby helping to reduce the distance between the second mirror group 13 and the third mirror group 15. Alternatively, it can be understood that without the second prism 14, to ensure the diffusion effect of the second mirror group 13 on the light beam or the field of view ratio, the distance between the second mirror group 13 and the third mirror group 15 needs to be reasonably increased. However, increasing the distance between the second mirror group 13 and the third mirror group 15 would significantly increase the size of the lens 10, which is detrimental to the miniaturization design of the lens 10.

[0094] In the example provided in this application, by configuring a second prism 14 between the second lens group 13 and the third lens group 15, and by having at least two second surfaces for reflection in the second prism 14, the propagation path of the light beam in the second prism 14 can be effectively increased. This helps to reduce the distance between the second lens group 13 and the third lens group 15, and effectively balances the large field of view and miniaturization of the lens 10. In addition, the second prism 14 can also deflect the light beam, which can improve the flexibility of the positional arrangement of the second lens group 13 and the third lens group 15, which also contributes to the miniaturization design of the lens 10.

[0095] Specifically, the second prism 14 includes a first incident surface 141, a reflecting surface 142, a reflecting surface 143, and a first exit surface 144. The first incident surface 141 faces the second mirror group 13, and is perpendicular to the optical axis 130 of the second mirror group 13, so that the light beam transmitted from the second mirror group 13 can be effectively transmitted into the second prism 14 to prevent chromatic aberration and other defects. The first exit surface 144 faces the third mirror group 15, and is perpendicular to the optical axis 150 of the third mirror group 15, so that the light beam transmitted from the second prism 14 can be effectively transmitted into the third mirror group 15 to prevent chromatic aberration and other defects.

[0096] In this process, the light beam enters the second prism 14 through the first incident surface 141, is reflected by the reflecting surface 142, and then shines on the reflecting surface 143. After being reflected by the reflecting surface 143, it shines on the first exit surface 144. The first exit surface 144 and the reflecting surface 142 are the same surface of the second prism 14. Therefore, in order for this surface to achieve good reflection and transmission functions at the same time, it needs to meet the condition of total internal reflection.

[0097] For example, the included angle θ1 between the first incident surface 141 and the first exit surface 144 (reflecting surface 142) satisfies: 40° ≤ θ1 ≤ 60°. It should be noted that the smaller the angle θ1, the smaller the dimension of the second prism 14 in the Y-axis direction. Conversely, the larger the angle θ1, the larger the dimension of the second prism 14 in the Y-axis direction. Therefore, when setting the second prism 14, the specific value of the included angle θ1 can be reasonably set according to the actual spatial requirements, which will not be elaborated here.

[0098] Furthermore, in practical applications, the refractive index of the second prism 14 is also related to its ability to refract light beams. In one example, the refractive index N1 of the second prism 14 can satisfy...

[0099] In other words, in order to make the reflecting surface 142 a total reflection surface, the angle θ1 and the refractive index of the second prism 14 can be reasonably set.

[0100] In one example, to ensure that the reflecting surface 143 can effectively reflect the light beam, a reflective film can be configured on the reflecting surface 143 in a specific application. The reflective film 143 can be configured according to currently commonly used types, and this application does not impose any restrictions on it.

[0101] In addition, such as Figure 7 and Figure 8 As shown, in order to ensure that the beam can pass through perpendicularly to the exit surface, the angle θ2 between the reflecting surfaces must satisfy θ1=2*θ2.

[0102] It should be noted that, in Figure 7 The example provided illustrates the concept of a second prism 14 comprising two reflecting surfaces. In other examples, the second prism 14 may also be configured with three or more reflecting surfaces. Alternatively, it can be understood that the light beam may undergo at least two reflections within the second prism 14, thereby increasing the propagation path of the light beam within the second prism 14.

[0103] In some embodiments, the first incident surface 141, the reflecting surface 142, and the reflecting surface 143 of the second prism 14 can be connected in pairs; in other words, the second prism 14 is formed as a triangular prism. In other embodiments, the second prism 14 is formed as a polygonal prism after the triangular prism has been chamfered, such as... Figure 8 As shown, the reflecting surface 142 and the reflecting surface 143 are not directly connected. The second prism 14 has a chamfered corner at the connection between the reflecting surface 142 and the reflecting surface 143, which helps to further reduce the space occupied by the second prism 14. In some other embodiments, the second prism 14 has a chamfered corner at the connection between the first incident surface 141 and the reflecting surface 142.

[0104] In addition, Figure 7 In the example provided, the first incident surface 141, reflecting surface 142, reflecting surface 143, and first exit surface 144 of the second prism 14 are all parallel to a second direction, which is consistent with the Z-axis. That is to say, the first incident surface 141, reflecting surface 142, and reflecting surface 143 are all perpendicular to the plane XOY. Therefore, the length dimension (Y-axis) and width dimension (X-axis) of the mobile phone can be effectively utilized, while avoiding the use of the thickness dimension (Z-axis) which has limited space.

[0105] In one example, the optical axis 130 of the second lens group 13 and the optical axis 150 of the third lens group 15 are set at an angle, which helps to reduce the length dimension of the lens 10 (i.e., the dimension in the Y-axis direction) and ensure that the second prism 14 has a larger dimension to provide more reflective surfaces.

[0106] Alternatively, it can be understood that if the optical axis 150 of the third lens group 15 is parallel to the optical axis 130 of the second lens group 13, the first incident surface 141 is perpendicular to the optical axis 130, and the first exit surface 144 is perpendicular to the optical axis 130, then the first incident surface 141 and the first exit surface 141 of the second prism 14 need to be parallel to each other, and the second prism 14 needs to be positioned between the second lens group 13 and the third lens group 15. Therefore, the distance between the second lens group 13 and the third lens group 15 needs to be large enough to provide sufficient space for installing the second prism 14, which increases the length of the lens 10. Furthermore, the parallelism of the optical axis 150 of the third lens group 15 to the optical axis 130 of the second lens group 13 significantly restricts the structure of the second prism 14, which is detrimental to improving the flexibility of the second prism 14.

[0107] Therefore, in the example provided in this application, the optical axis 130 of the second lens group 13 and the optical axis 150 of the third lens group 15 are set at an angle, which helps to reduce the length of the lens 10 and ensures that the second prism 14 has a larger size to provide more reflective surfaces. Furthermore, the second prism 14 has better flexibility in its structural arrangement.

[0108] In addition, in the example provided in this application, the structure of the second prism 14 extends along the X-axis direction, which can reduce the space occupied by the second prism 14 in the Y-axis direction, which is also beneficial to reducing the length of the lens 10.

[0109] In specific settings, the angle between the optical axis 130 of the second mirror group 13 and the optical axis 150 of the third mirror group 15 can be determined according to actual needs, which will not be elaborated here.

[0110] like Figure 6 and Figure 7As shown, in one example provided in this application, the lens 10 also includes a third prism 16. The third prism 16 has at least three third surfaces for reflecting the light beam. The at least three third surfaces effectively increase the propagation path of the light beam in the third prism 16, which helps to reduce the distance between the third lens group 15 and the photosensitive element 101, effectively balancing the large focal length ratio and miniaturization of the lens 10. Furthermore, the third prism 16 can also deflect the light beam, improving the flexibility of the photosensitive element 101 in terms of its positional layout.

[0111] Specifically, the third prism 16 includes a second incident surface 161, a reflecting surface 162, a reflecting surface 163, a reflecting surface 164, and a second exiting surface 165. The second incident surface 161 faces the third mirror group 15 and is perpendicular to the optical axis 150 of the third mirror group 15, so that the light beam transmitted from the third mirror group 15 can be effectively transmitted into the third prism 16 to prevent chromatic aberration and other defects. The second exiting surface 165 faces the photosensitive element 101 and is parallel to the photosensitive surface of the photosensitive element 101, so that the light beam transmitted from the third prism 16 can be effectively transmitted into the photosensitive element 101 to prevent chromatic aberration and other defects.

[0112] In this process, the light beam enters the third prism 16 through the second incident surface 161, is reflected by the reflecting surface 162, then shines on the reflecting surface 163, is reflected by the reflecting surface 163, shines on the reflecting surface 164, and is then reflected by the reflecting surface 164 before shining on the exit surface 165. The second exit surface 165 and the reflecting surface 162 are the same surface of the third prism 16. Therefore, in order for this surface to simultaneously achieve reflection and transmission functions, it needs to satisfy the condition of total internal reflection.

[0113] For example, the included angle θ3 between the second incident surface 161 and the second exit surface 165 (reflecting surface 162) satisfies: 40°≤θ3≤60°.

[0114] Furthermore, since the second incident surface 161 and the reflecting surface 164 are the same surface of the third prism 16, in order for this surface to simultaneously achieve reflection and transmission functions, it needs to satisfy the condition of total internal reflection.

[0115] For example, in one embodiment provided in this application, the cross-section of the third prism 16 is an isosceles triangle, wherein the second incident surface 161 (reflecting surface 164) and the second exiting surface 165 (reflecting surface 162) are the two legs of the triangle, and the reflecting surface 163 is the base of the triangle. This allows the light beam to undergo total internal reflection after being reflected from the reflecting surface 163 to the reflecting surface 164.

[0116] Furthermore, in practical applications, the refractive index of the third prism 16 is also related to its ability to refract light beams. In one example, the refractive index N2 of the third prism 16 can satisfy...

[0117] In other words, in order to make the reflecting surfaces 162 and 164 total reflection surfaces, the angle θ3 and the refractive index of the third prism 16 can be reasonably set.

[0118] In addition, to ensure that the reflecting surface 163 can effectively reflect the light beam, a reflective film can be configured on the reflecting surface 163 in specific applications. The reflective film can be configured according to currently commonly used types, and this application does not impose any restrictions on it.

[0119] In addition, such as Figure 7 and Figure 9 As shown, in specific settings, θ1 and θ3 can be equal or unequal.

[0120] When θ1 and θ3 are equal, the length of lens 10 can also be effectively reduced.

[0121] Specifically, such as Figure 7 As shown, in specific settings, to ensure beam quality and prevent chromatic aberration, the first exit surface 144 and the second incident surface 161 can be made parallel to each other and both perpendicular to the optical axis 150 of the third lens group 15. After θ1 and θ3 are equal, the first incident surface 141 and the second exit surface 165 are made parallel to each other and both perpendicular to the Y-axis. The Y-axis direction is the length direction of the lens 10, thus effectively reducing the length of the lens 10.

[0122] It should be noted that, in Figure 7 The example provided illustrates the concept by using a third prism 16 with three reflecting surfaces. In other examples, the third prism 16 may also be configured with four or more reflecting surfaces. Alternatively, it can be understood that the light beam can undergo at least three reflections within the third prism 16 to increase the propagation path of the light beam within the third prism 16.

[0123] In addition, Figure 7 In the example provided, the second incident surface 161, reflecting surface 162, reflecting surface 163, reflecting surface 164, and second exit surface 165 of the third prism 16 are all parallel to a second direction, which is consistent with the Z-axis. In other words, the second incident surface 161, reflecting surface 162, reflecting surface 163, reflecting surface 164, and second exit surface 165 are all perpendicular to the XOY plane. Therefore, the length (Y-axis) and width (X-axis) dimensions of the phone can be effectively utilized, while avoiding the use of the thickness dimension (Z-axis), which has limited space.

[0124] In one example, the optical axis 150 of the third lens group 15 and the photosensitive surface of the photosensitive element 101 are set at an angle of less than 90°. This helps to reduce the length of the lens 10 and ensures that the third prism 16 has a larger size to provide more reflective surfaces.

[0125] Alternatively, it can be understood that if the photosensitive surface of the photosensitive element 101 is perpendicular to the optical axis 150 of the third lens group 15, then the second incident surface and the second exit surface of the third prism 16 need to be parallel to each other. Furthermore, the third prism 16 needs to be positioned between the third lens group 15 and the photosensitive element 101. Therefore, the distance between the third lens group 15 and the photosensitive element 101 needs to be large enough to allow sufficient space for the installation of the third prism 16, which increases the length of the lens 10. In addition, the perpendicularity between the photosensitive surface of the photosensitive element 101 and the optical axis 150 of the third lens group 15 significantly restricts the structure of the third prism 16, hindering its flexibility.

[0126] Therefore, in the example provided in this application, the optical axis 150 of the third lens group 15 and the photosensitive surface of the photosensitive element 101 are set at an angle, which helps to reduce the length of the lens 10 and ensures that the third prism 16 has a larger size to provide more reflective surfaces. Furthermore, the third prism 16 has better flexibility in its structural arrangement.

[0127] In addition, in the example provided in this application, the structure of the third prism 16 extends along the X-axis direction, which can reduce the space occupied by the third prism 16 in the Y-axis direction, which is also beneficial to reducing the length of the lens 10.

[0128] In specific settings, the angle between the optical axis 150 of the third lens group 15 and the photosensitive surface of the photosensitive element 101 can be determined according to actual needs, which will not be elaborated here.

[0129] Alternatively, it can be understood that, in the example provided in this application, the reflecting surface 122 of the first prism 12 is parallel to the first direction (X-axis), and the reflecting surfaces of the second prism 14 and the third prism 16 are both parallel to the second direction (Z-axis). Therefore, the dimensions along the X-axis, Y-axis and Z-axis in space can be effectively utilized.

[0130] In addition, in some examples, lens 10 may be equipped with more prisms.

[0131] For example, such as Figure 10 and Figure 11 As shown, in another example provided in this application, the lens 10 also includes a fourth prism 17, which is located on the image side of the third prism 16. The fourth prism 17 is used to refract the light beam transmitted from the third prism 16 and then transmit it to the photosensitive surface of the photosensitive element 101.

[0132] In specific configurations, the type of the fourth prism 17 can vary.

[0133] For example, such as Figure 10 and Figure 11 As shown, in one example provided in this application, the fourth prism 17 is specifically a Schmidt prism. By configuring this fourth prism 17, the height dimension of the rear (image side) of the camera module 100 can be reduced. This height dimension is consistent with the Z-axis.

[0134] Specifically, the fourth prism 17 includes an incident surface 171, a reflecting surface 172, a reflecting surface 173, and an exit surface 174. The incident surface 171 faces the second exit surface 165 of the third prism 16, and the second exit surface 165 is parallel to the incident surface 171, so that the light beam transmitted from the third prism 16 can be effectively transmitted into the fourth prism 17, preventing chromatic aberration and other defects. The exit surface 174 faces the photosensitive element 101, and the exit surface 174 is parallel to the photosensitive surface of the photosensitive element 101, so that the light beam transmitted from the fourth prism 17 can be effectively transmitted into the photosensitive element 101, preventing chromatic aberration and other defects.

[0135] In this process, the light beam enters the fourth prism 17 through the incident surface 171, is reflected by the reflecting surface 172, and then shines on the reflecting surface 173. After being reflected by the reflecting surface 173, it shines on the exit surface 174. The exit surface 174 and the reflecting surface 172 are the same surface of the fourth prism 17. Therefore, in order for this surface to simultaneously achieve reflection and transmission functions, it needs to meet the condition of total internal reflection.

[0136] For example, the angle θ4 between the incident surface 171 and the exit surface 174 (reflecting surface 172) satisfies: 45° < θ4. It should be noted that the smaller the angle θ4, the smaller the dimension of the fourth prism 17 in the Z-axis direction. Conversely, the larger the angle θ4, the larger the dimension of the fourth prism 17 in the Z-axis direction. Therefore, when setting the fourth prism 17, the specific value of the angle θ4 can be reasonably set according to the actual spatial requirements, which will not be elaborated here.

[0137] Furthermore, in practical applications, the refractive index of the fourth prism 17 is also related to its ability to refract light beams. In one example, the refractive index N1 of the fourth prism 17 can satisfy...

[0138] In other words, in order to make the reflecting surface 172 a total reflection surface, the angle θ4 and the refractive index of the fourth prism 17 can be reasonably set.

[0139] In addition, to ensure that the reflecting surface 173 can effectively reflect the light beam, a reflective film can be configured on the reflecting surface 173 in specific applications. The reflective film can be configured according to currently commonly used types, and this application does not impose any restrictions on it.

[0140] It should be noted that the example provided in the figure is illustrative, using the example of a fourth prism 17 including two reflecting surfaces. In other examples, the fourth prism 17 may also be configured with three or more reflecting surfaces. Alternatively, it can be understood that the light beam can produce at least two reflections in the fourth prism 17, thereby increasing the propagation path of the light beam in the fourth prism 17.

[0141] In addition, Figure 10 and Figure 11 In the example provided, the incident surface 171, reflecting surface 172, reflecting surface 173, and exit surface 174 of the fourth prism 17 are all parallel to a first direction, which is aligned with the X-axis. In other words, the incident surface 171, reflecting surface 172, reflecting surface 173, and exit surface 174 are all perpendicular to the ZOY plane, thus enabling effective utilization of the phone's thickness dimension (Z-axis).

[0142] Please refer to the following: Figure 6 and Figure 10 .exist Figure 10 In this process, by configuring the fourth prism 17, the propagation direction of the light beam can be deflected, so that the light beam can be folded in the Z-axis direction and then pass through. Therefore, the photosensitive surface of the photosensitive element 101 can be tilted in the Z-axis direction.

[0143] Or it can be understood that, Figure 6 In this case, the photosensitive surface of the photosensitive element 101 is parallel to the Z-axis direction. Therefore, the space in the Z-axis direction will restrict the area of ​​the photosensitive surface, which is not conducive to configuring a larger area of ​​photosensitive surface in the confined Z-axis direction.

[0144] exist Figure 10 In the example provided, the photosensitive surface of the photosensitive element 101 is tilted in the Z-axis direction. Therefore, it is helpful to reasonably increase the area of ​​the photosensitive surface by relying on the larger X-axis and Y-axis space. At the same time, it can also reduce the space occupied by the photosensitive element 101 in the Z-axis direction, which is beneficial to reduce the height of the rear of the camera module 100 and improve the light-sensing performance of the camera module 100.

[0145] Modulation transfer function (MTF) is one of the metrics used to evaluate the imaging quality of an optical system. A higher MTF indicates better imaging quality.

[0146] Therefore, embodiments of this application also provide Figure 10The MTF curve of lens 10 shown.

[0147] exist Figure 12 and Figure 13 In the diagram, the horizontal axis represents the defocus amount in mm, and the vertical axis represents the modulation contrast.

[0148] exist Figure 12 The diagram in the image shows the MTF defocus curve of the lens at infinity with a central field of view of 125 lp / mm. Figure 12 The different curves in the figure represent the relationship between modulation contrast and defocus at different image height positions.

[0149] exist Figure 13 The image shows a schematic diagram of the lens's MTF defocus curve at 1m with a central field of view of 125 lp / mm. Figure 13 The different curves in the figure represent the relationship between modulation contrast and defocus at different image height positions.

[0150] from Figure 12 and Figure 13 As can be clearly seen, the lens 10 provided in this application embodiment has good imaging effect in both near-focus and far-focus.

[0151] Or, such as Figure 14 and Figure 15 As shown, in another example provided in this application, the fourth prism 17 is specifically a right-angle prism. By configuring a right-angle prism, the length of the lens 10 can be effectively reduced. It should be noted that... Figure 14 and Figure 15 In this configuration, the fourth prism 17 is arranged in the opposite direction along the Z-axis to allow for better flexibility in the positional layout of the photosensitive element 101.

[0152] Specifically, the fourth prism 17 includes an incident surface 175, a reflecting surface 176, and an exit surface 177. The incident surface 175 faces the second exit surface 165 of the third prism 16, and the second exit surface 165 is parallel to the incident surface 175, so that the light beam transmitted from the third prism 16 can be effectively transmitted into the fourth prism 17, preventing adverse problems such as chromatic aberration. The exit surface 177 faces the photosensitive element 101, and the exit surface 177 is parallel to the photosensitive surface of the photosensitive element 101, so that the light beam transmitted from the fourth prism 17 can be effectively transmitted into the photosensitive element 101, preventing adverse problems such as chromatic aberration.

[0153] The angle between the incident surface 175 and the exit surface 177 is 90°. In addition, in order to achieve total internal reflection by the reflecting surface 176 and to allow the light beam to pass through perpendicularly to the exit surface 177, the angle between the reflecting surface 176 and both the incident surface 175 and the exit surface 177 is 45°.

[0154] exist Figure 14 and Figure 15 In this process, by configuring the fourth prism 17, the propagation direction of the light beam can be deflected, allowing the light beam to pass through along the Z-axis direction. Therefore, the size of the lens 10 in the Y-axis direction can be reduced.

[0155] In addition, the photosensitive surface of the photosensitive element can be perpendicular to the Z-axis direction. Therefore, the space in the Z-axis direction will not restrict the area of ​​the photosensitive surface, which is conducive to configuring a larger area of ​​photosensitive surface in the limited Z-axis direction and improving the light sensitivity performance of the camera module.

[0156] It should be noted that the above example uses a Schmidt prism and a right-angle prism as examples. In practical applications, the fourth prism 17 can also be other types of prisms. Alternatively, other prisms can be configured on the image side of the fourth prism 17. Further details will not be provided here.

[0157] Furthermore, the terms "parallel" and "perpendicular" mentioned above refer to approximate parallelism or perpendicularity, meaning that dimensional deviations are permissible. Similarly, the descriptions of parameters such as angles or refractive indices are also approximate values; in practical applications, dimensional deviations may exist.

[0158] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0159] In this application, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural.

[0160] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A lens characterized by comprising: The first mirror group, the first prism, the second mirror group, the second prism, the third mirror group and the third prism are arranged in sequence from the object side to the image side; The first mirror group has positive optical power, the second mirror group has negative optical power, and the third mirror group has negative optical power; The first prism has a first surface for reflecting a light beam passing through the first mirror group to the second mirror group; The second prism has at least two second surfaces for reflecting a light beam passing through the second mirror group to the third mirror group; The third prism has at least three third surfaces; The first surface is parallel to a first direction, the second surface and the third surface are parallel to a second direction, and the first direction and the second direction are perpendicular to each other.

2. The lens according to claim 1, characterized in that, An optical axis of the second mirror group is parallel to a third direction; The third direction is perpendicular to the first direction and the second direction.

3. The lens according to claim 1 or 2, characterized in that, An optical axis of the third mirror group forms an angle with the optical axis of the second mirror group.

4. The lens according to claim 3, characterized in that, An optical axis of the first mirror group is perpendicular to the optical axis of the second mirror group and the optical axis of the third mirror group.

5. The lens barrel according to any one of claims 1 to 4, characterized in that, The second prism includes a first incident surface and a first exit surface, the first incident surface faces the second mirror group, and the first exit surface faces the third mirror group; The at least two second surfaces of the second prism include a first reflection surface and a second reflection surface, a light beam passing through the first incident surface transmits through the first reflection surface and the second reflection surface and then transmits from the first exit surface; The first reflection surface and the first exit surface are the same surface of the second prism.

6. The lens of claim 5, wherein, An included angle θ1 between the first incident surface and the first exit surface satisfies 40°≤θ1≤60°.

7. The lens of claim 6, wherein, The refractive index N1 of the second prism satisfies, 8. The lens according to any one of claims 5 to 7, characterized in that, An included angle between the second reflection surface and the first exit surface is θ2, and θ1=2*θ2.

9. The lens according to any one of claims 5 to 8, characterized in that, The first incident surface is perpendicular to the optical axis of the second mirror group.

10. The lens according to any one of claims 5 to 9, characterized in that, The first exit surface is perpendicular to the optical axis of the third mirror group.

11. The lens barrel according to any one of claims 1 to 10, characterized in that, The third prism includes a second incident surface and a second exit surface, and the second incident surface faces the third mirror group; The at least three third surfaces of the third prism include a third reflection surface, a fourth reflection surface and a fifth reflection surface, a light beam passing through the second incident surface transmits through the third reflection surface, the fifth reflection surface and the fourth reflection surface and then transmits from the second exit surface; The third reflection surface and the second exit surface are the same surface of the third prism.

12. The lens according to claim 11, characterized in that, An included angle θ3 between the second incident surface and the second exit surface satisfies 40°≤θ3≤60°.

13. The lens of claim 12, wherein, The refractive index N2 of the third prism satisfies, 14. The lens barrel according to any one of claims 5 to 13, characterized by The third prism includes a second incident surface and a second exit surface, an included angle between the second incident surface and the second exit surface is θ3, and an included angle between the first incident surface and the first exit surface is θ1; θ1 and θ3 are equal.

15. The lens according to any one of claims 11 to 14, characterized in that The fourth reflection surface and the second incident surface are the same surface of the third prism.

16. The lens of claim 15, wherein, An included angle between the fifth reflection surface and the second incident surface is equal to an included angle between the fifth reflection surface and the second exit surface.

17. The lens according to any one of claims 11 to 16, characterized in that, The second incident surface is perpendicular to the optical axis of the third mirror group.

18. The lens barrel according to any one of claims 1 to 17, characterized in that, The first prism is a right-angle prism.

19. The lens barrel according to any one of claims 1 to 18, characterized by The lens further comprises a fourth prism, which is located on the image side of the third prism. The fourth prism is a right-angle prism or a Schmidt prism.

20. The lens barrel according to any one of claims 1 to 19, characterized by, The second lens group is movable along its optical axis.

21. An image capture module, comprising: A camera module comprising a light-receiving element and the lens according to any one of claims 1 to 20, the light-receiving element being disposed on the image side of the lens.

22. An electronic device, comprising: A camera module comprising a housing and the camera module according to claim 21, the camera module being disposed in the housing.

Images