Optical lens, packaging structure thereof, camera module and electronic equipment

Abstract

The embodiment of the utility model provides an optical lens, a packaging structure thereof, a camera module and electronic equipment, relates to the technical field of camera shooting, and aims to reduce the size of the optical lens. The optical lens comprises a lens with positive focal power, a first refraction part comprising a free-form surface, a second refraction part comprising a free-form surface and a third refraction part comprising a free-form surface which are arranged in sequence from an object side to an image side. The first refraction piece is used for reflecting light rays from the lens for multiple times and transmitting the reflected light rays to the second refraction piece. The second refraction piece is used for transmitting the light from the first refraction piece to the third refraction piece. And the third refraction piece is used for reflecting the light from the second refraction piece for multiple times and transmitting the reflected light. Light emitted from the lens sequentially passes through the free-form surface of the first refraction piece, the free-form surface of the second refraction piece and the free-form surface of the third refraction piece and then is transmitted.

Description

Technical Field

[0001] This application relates to the field of imaging technology, and in particular, to an optical lens and its packaging structure, an imaging module, and an electronic device. Background Art

[0002] With the development of electronic devices, people's requirements for photography are also getting higher and higher. In order to meet people's photography experience, telephoto lenses are gradually applied to electronic devices.

[0003] However, due to the large size of the telephoto lens and the size limitation of the electronic device, the application of the telephoto lens is restricted. Summary of the Utility Model

[0004] Embodiments of this application provide an optical lens and its packaging structure, an imaging module, and an electronic device, which are used to reduce the size of the optical lens.

[0005] To achieve the above object, this application adopts the following technical solutions:

[0006] In the first aspect of the embodiments of this application, an optical lens is provided, which includes a lens with a positive optical power arranged in sequence from the object side to the image side, a first refractive element including a free-form surface, a second refractive element including a free-form surface, and a third refractive element including a free-form surface. The first refractive element is used to reflect the light from the lens multiple times and transmit the reflected light to the second refractive element. The second refractive element is used to transmit the light from the first refractive element to the third refractive element. The third refractive element is used to reflect the light from the second refractive element multiple times and transmit the reflected light. Among them, the light emitted from the lens passes through the free-form surface of the first refractive element, the free-form surface of the second refractive element, and the free-form surface of the third refractive element in sequence and then is transmitted.

[0007] For the optical lens provided by the embodiments of this application, the light is output from the lens and then incident on the first refractive element. The light is reflected multiple times in the first refractive element and then incident on the second refractive element. After passing through the second refractive element by transmission, it is transmitted to the third refractive element and is output after being reflected multiple times in the third refractive element. When the light is transmitted in the first refractive element and the third refractive element, it is reflected multiple times, which can fold the optical path, reduce the size of the optical lens, and realize the miniaturization of the optical lens. The optical lens provided by the embodiments of this application includes multiple free-form surfaces. The transmission of the light through multiple free-form surfaces can increase the degree of freedom of aberration correction, and thus, on the premise of ensuring the imaging quality, a larger light transmission amount can be achieved, and the imaging size of the optical lens can be increased.

[0008] In a possible implementation, the first refractive element includes a first incident surface, a first exit surface, and a first reflective surface; the first incident surface faces the lens, and the first exit surface faces the second refractive element; the first incident surface, the first exit surface, and the first reflective surface all intersect; at least one of the first incident surface, the first exit surface, and the first reflective surface is a free-form surface; the first incident surface is configured to transmit light from the lens to the first reflective surface; the first reflective surface is configured to reflect at least part of the light from the first incident surface back to the first incident surface; the first incident surface is further configured to reflect at least part of the light from the first reflective surface to the first exit surface; the first exit surface is configured to transmit at least part of the light from the first incident surface to the second refractive element. In this way, the light can be refracted multiple times within the first refractive element, thereby reducing the size of the optical lens.

[0009] In a possible implementation, the second refractive element includes a second incident surface and a second exit surface; the second incident surface faces the first refractive element, and the second exit surface faces the third refractive element; either the second incident surface or the second exit surface is a free-form surface; the second incident surface is configured to transmit light from the first refractive element to the second exit surface; the second exit surface is configured to transmit at least part of the light from the second incident surface to the third refractive element. In this way, when the light passes through the free-form surface, the chromatic aberration and field curvature of the optical lens can be well balanced.

[0010] In a possible implementation, the third refractive element includes a third incident surface, a third exit surface, and a third reflective surface; the third incident surface faces the second refractive element; the third incident surface, the third exit surface, and the third reflective surface all intersect; at least one of the third incident surface, the third exit surface, and the third reflective surface is a free-form surface; the third incident surface is configured to transmit light from the second refractive element to the third exit surface; the third exit surface is configured to reflect at least part of the light from the third incident surface to the third reflective surface; the third reflective surface is configured to reflect at least part of the light from the third exit surface back to the third exit surface; the third exit surface is further configured to transmit at least part of the light from the third reflective surface. In this way, the light can be refracted multiple times within the third refractive element, thereby reducing the size of the optical lens.

[0011] In a possible implementation, all surfaces of the first refractive element are free-form surfaces. In this way, the chromatic aberration and field curvature of the optical lens can be further balanced.

[0012] In a possible implementation, all surfaces of the second refractive element are free-form surfaces. In this way, the chromatic aberration and field curvature of the optical lens can be further balanced.

[0013] In a possible implementation, all surfaces of the third refractive element are free-form surfaces. In this way, the chromatic aberration and field curvature of the optical lens can be further balanced.

[0014] In a possible implementation, at least one surface of the first refractive element is an off-axis non-rotationally symmetric freeform surface. In this way, aberration can be corrected and the design freedom can be improved.

[0015] In a possible implementation, at least one surface of the second refractive element is an off-axis non-rotationally symmetric freeform surface. In this way, aberration can be corrected and the design freedom can be improved.

[0016] In a possible implementation, at least one surface of the third refractive element is an off-axis non-rotationally symmetric freeform surface. In this way, aberration can be corrected and the design freedom can be improved.

[0017] In a possible implementation, the refractive index n0 of light in the lens, the refractive index n1 of light in the first refractive element, the refractive index n2 of light in the second refractive element, and the refractive index n3 of light in the third refractive element satisfy: n1 < n2 < n0 < n3. In this way, chromatic aberration and field curvature can be balanced, the aperture of the optical lens can be increased, and the size of the optical lens can be reduced.

[0018] In a possible implementation, both the object side and the image side of the lens are aspherical surfaces. In this way, aberration can be balanced, the incident angle of light can be adjusted, the design freedom of the optical lens can be increased, and the imaging effect can be improved.

[0019] In a possible implementation, both the object side and the image side of the lens are rotationally symmetric surfaces. In this way, the imaging effect can be improved and the aberration can be reduced.

[0020] In a possible implementation, the object side of the lens is a convex surface. In this way, the imaging effect is good and the imaging quality can be improved.

[0021] In a possible implementation, the first refractive element includes a first incident surface, a first exit surface, and a first reflection surface; the first incident surface faces the lens, and the first exit surface faces the second refractive element; the second refractive element includes a second incident surface and a second exit surface; the second incident surface faces the first refractive element, and the second exit surface faces the third refractive element; the third refractive element includes a third incident surface, a third exit surface, and a third reflection surface; the third incident surface faces the second refractive element; the first exit surface and the second incident surface are joined, and the second exit surface and the third incident surface are joined. In this way, the assembly difficulty can be reduced.

[0022] In a possible implementation, the first refractive element includes a prism. In this way, an implementation manner of an optical lens is provided.

[0023] In a possible implementation, the second refractive element includes a prism. In this way, an implementation manner of an optical lens is provided.

[0024] In a possible implementation, the third refractive member includes a prism. In this way, an implementation of an optical lens is provided.

[0025] The optical lens provided in the second aspect of the embodiments of the present application includes a lens with positive optical power, a first refractive member with a free-form surface, and a third refractive member with a free-form surface, which are arranged in sequence from the object side to the image side. Among them, the first refractive member is configured to reflect the light from the lens multiple times and transmit the reflected light to the third refractive member. The third refractive member is configured to reflect the light from the first refractive member multiple times and transmit the reflected light. Among them, the first refractive member and the third refractive member are adhered to each other; the light emitted from the lens is transmitted after passing through the free-form surface of the first refractive member and the free-form surface of the third refractive member in sequence.

[0026] For the optical lens provided in the embodiments of the present application, the light is incident on the first refractive member after being output from the lens, and is incident on the third refractive member after being reflected multiple times in the first refractive member, and then is output after being reflected multiple times by the third refractive member. When the light is transmitted in the first refractive member and the third refractive member, it is reflected multiple times, which can fold the optical path, reduce the size of the optical lens, and realize the miniaturization of the optical lens. In addition, the adhesion of the first refractive member and the third refractive member can further reduce the size of the optical lens and reduce the assembly difficulty. The optical lens provided in the embodiments of the present application includes multiple free-form surfaces. The transmission of the light through the multiple free-form surfaces can increase the degree of freedom of aberration correction, and thus, on the premise of ensuring the imaging quality, a larger light transmission amount can be achieved, and the imaging size of the optical lens can be increased.

[0027] In a possible implementation, the first refractive element includes a first incident surface, a first exit surface, and a first reflection surface; the first incident surface faces the lens, the first exit surface faces the third refractive element, and the first incident surface, the first exit surface, and the first reflection surface all intersect; at least one of the first incident surface, the first exit surface, and the first reflection surface is a free-form surface; the first incident surface is configured to transmit light rays from the lens to the first reflection surface; the first reflection surface is configured to reflect at least part of the light rays from the first incident surface to the first incident surface; the first incident surface is further configured to reflect at least part of the light rays from the first reflection surface to the first exit surface; the first exit surface is configured to transmit at least part of the light rays from the first incident surface to the third refractive element. The third refractive element includes a third incident surface, a third exit surface, and a third reflection surface; the third incident surface faces the first refractive element; the third incident surface, the third exit surface, and the third reflection surface all intersect; at least one of the third incident surface, the third exit surface, and the third reflection surface is a free-form surface; the third incident surface is configured to transmit light rays from the first refractive element to the third exit surface; the third exit surface is configured to reflect at least part of the light rays from the third incident surface to the third reflection surface; the third reflection surface is configured to reflect at least part of the light rays from the third exit surface to the third exit surface; the third exit surface is further configured to transmit at least part of the light rays from the third reflection surface. Among them, the first exit surface and the third incident surface are attached. In this way, the assembly difficulty can be reduced.

[0028] In a possible implementation, the refractive index n0 of light rays in the lens, the refractive index n1 of light rays in the first refractive element, and the refractive index n3 of light rays in the third refractive element satisfy: n1 < n0 < n3. In this way, chromatic aberration and field curvature can be balanced, the aperture of the optical lens can be increased, and the size of the optical lens can be reduced.

[0029] The imaging module provided in the third aspect of the embodiments of the present application includes a packaging structure, an optical sensor, and an optical lens according to any one of the first aspect and the second aspect; the optical sensor is disposed on the image side of the optical lens; the optical lens is disposed within the packaging structure. Among them, the packaging structure includes a lens barrel provided with an accommodation cavity and a guide rail disposed inside the lens barrel. Among them, a limiting hole is opened on the side wall of the lens barrel, the limiting hole penetrates the side wall of the lens barrel and communicates with the accommodation cavity. The accommodation cavity is used to place the refractive element of the optical lens, and the limiting hole is used to place the lens of the optical lens. The guide rail is used to connect the refractive elements so that the refractive elements can move along the extending direction of the lens barrel.

[0030] The imaging module provided in the third aspect of the embodiments of the present application includes the optical lens according to any one of the first aspect and the second aspect, and its beneficial effects are the same as those of the optical lens, which will not be elaborated here. In addition, the packaging structure of the embodiments of the present application is simple in structure. The refractive elements are fixed to the lens barrel through the guide rail, which is convenient for assembly and has strong applicability.

[0031] In a possible implementation, the encapsulation structure further includes a light shield; the light shield is disposed outside the lens barrel. In this way, interference with the incident light to the optical lens is avoided.

[0032] In a possible implementation, a light exit hole is further provided on the side wall of the lens barrel; the encapsulation structure further includes a filter; the filter is disposed in the light exit hole. In this way, the unnecessary wavelength bands in the light are filtered out, preventing the photosensitive element from generating false colors or ripples, so as to improve the effective resolution and color reproducibility.

[0033] In a fourth aspect of the embodiments of the present application, an electronic device is provided, including the imaging module of the third aspect and a printed circuit board; the imaging module and the printed circuit board are electrically connected.

[0034] The electronic device provided in the fourth aspect of the embodiments of the present application includes the imaging module of the third aspect, and its beneficial effects are the same as those of the imaging module, and will not be elaborated here.

[0035] The encapsulation structure provided in the fifth aspect of the embodiments of the present application includes a lens barrel having an accommodation cavity and a guide rail disposed inside the lens barrel. Wherein, a limiting hole is opened on the side wall of the lens barrel, the limiting hole penetrates through the side wall of the lens barrel and communicates with the accommodation cavity. The accommodation cavity is used to place the refractive member of the optical lens, and the limiting hole is used to place the lens of the optical lens. The guide rail is used to connect the refractive member so that the refractive member can move along the extending direction of the lens barrel.

[0036] The encapsulation structure provided in the embodiments of the present application has a simple structure. The refractive member is fixed on the lens barrel through the guide rail, which is convenient for assembly and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1A is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0038] Figure 1B is a schematic structural diagram of an imaging module provided in an embodiment of the present application;

[0039] Figure 2A is a schematic diagram of an imaging of an imaging module provided in an embodiment of the present application;

[0040] Figure 2B is a schematic diagram of another imaging of an imaging module provided in an embodiment of the present application;

[0041] Figure 3A is a schematic structural diagram of an optical lens provided in an embodiment of the present application;

[0042] Figure 3B is a schematic structural diagram of another electronic device provided in an embodiment of the present application;

[0043] Figure 4Schematic diagram of a periscope optical path structure illustrated in an embodiment of the present application;

[0044] Figure 5 Schematic diagram of another optical lens structure provided by an embodiment of the present application;

[0045] Figure 6 Schematic diagram of yet another optical lens structure provided by an embodiment of the present application;

[0046] Figure 7 Schematic diagram of yet another optical lens structure provided by an embodiment of the present application;

[0047] Figure 8A is Figure 6 Modulation transfer function curve graph of the optical lens shown;

[0048] Figure 8B is Figure 6 Distortion grid graph of the optical lens shown;

[0049] Figure 9 Schematic diagram of yet another optical lens structure provided by an embodiment of the present application;

[0050] Figure 10 Schematic diagram of yet another optical lens structure provided by an embodiment of the present application;

[0051] Figure 11A is Figure 9 Modulation transfer function curve graph of the optical lens shown;

[0052] Figure 11B is Figure 9 Distortion grid graph of the optical lens shown;

[0053] Figure 12A Schematic diagram of a packaging structure of an optical lens provided by an embodiment of the present application;

[0054] Figure 12B is Figure 12A An exploded view of;

[0055] Figure 13 Flow chart of a packaging method of an optical lens provided by an embodiment of the present application.

[0056] Reference numerals

[0057] 1 - Electronic device; 2 - Display module; 3 - Middle frame; 4 - Housing; 5 - Cover plate; 10 - Camera module; 20 - Photosensitive element; 30 - Filter; 100 - Optical lens; 110 - Lens; 210 - First refractive member; 211 - First incident surface; 212 - First exit surface; 213 - First reflection surface; 220 - Second refractive member; 221 - Second incident surface; 222 - Second exit surface; 230 - Third refractive member; 231 - Third incident surface; 232 - Third exit surface; 233 - Third reflection surface; 200 - Encapsulation structure of the optical lens; 310 - Lens barrel; 311 - Accommodation cavity; 312 - Limiting hole; 313 - Light exit hole; 320 - Guide rail; 330 - Light shielding sheet; 340 - Filter. Detailed implementation manners

[0058] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0059] Hereinafter, terms such as "second" and "first" are only for convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "second", "first", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0060] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left", "right", etc. may include but are not limited to being defined relative to the schematic placement orientation of the components in the drawings. It should be understood that these directional terms may be relative concepts, which are used for relative description and clarification, and they may change correspondingly according to the change of the orientation of the components in the drawings.

[0061] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium. In addition, the term "coupled" may be a direct electrical connection, or an indirect electrical connection through an intermediate medium. The term "contact" may be direct contact, or indirect contact through an intermediate medium.

[0062] In the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0063] For the convenience of understanding the technical solution, the technical terms involved in this application are explained below.

[0064] Image side, object side: The range through which the imaging light passes. Among them, the imaging light includes the chief ray and the marginal ray. The image side is the surface facing the image, and the object side is the surface facing the object.

[0065] Focal power: It is equal to the difference between the convergence degree of the image-side light beam and the convergence degree of the object-side light beam, and characterizes the refractive ability of the optical system for the incident parallel light beam. The focal power is generally represented by φ. The larger the value of φ, the more severely the parallel light beam is refracted. When φ > 0, the refraction is convergent; when φ < 0, the refraction is divergent. When φ = 0, it is plane refraction, that is, the on-axis parallel light beam remains an on-axis parallel light beam after refraction, without refraction phenomenon.

[0066] Thickness of the lens: The thickness of the lens on the optical axis is the thickness of the lens.

[0067] Focal length (focal length, f), also known as the focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the perpendicular distance from the optical center of the lens or lens group to the imaging plane when an infinitely distant scene forms a clear image on the imaging plane through the lens or lens group.

[0068] Effective focal length (effective focal length, EFL): The distance between the rear principal plane of the lens or lens group and the imaging plane. For a thin lens, the focal length is the distance from the center of the lens to the imaging plane; for a thick lens or lens group, the focal length is equal to the effective focal length.

[0069] Back focal length (back focal length, BFL): Also known as the back focal length, it refers to the distance from the lens closest to the image side in the lens or lens group to the imaging plane of the optical lens.

[0070] Telephoto ratio: The ratio of the overall optical length to the focal length. The smaller the telephoto ratio, the longer the focal length the optical system can achieve in a shorter size.

[0071] Optical axis: A ray of light that vertically passes through the center of an ideal lens. When a ray of light parallel to the optical axis enters a convex lens, an ideal convex lens should be such that all the rays converge at a point behind the lens. The point where all the rays converge is the focal point.

[0072] Positive focal power: The lens or lens group has a positive focal length and has the effect of converging light rays.

[0073] Negative focal power: The lens or lens group has a negative focal length and has the effect of diverging light rays.

[0074] Chief ray: The ray passing through the center of the entrance pupil and the exit pupil of the lens.

[0075] Optical axis is a ray perpendicular to the center of the ideal lens. When a ray parallel to the optical axis enters a convex lens, an ideal convex lens should converge all the rays at a point behind the lens, and this point where all the rays converge is the focal point.

[0076] Freeform surface: A surface whose shape cannot be continuously machined and has the arbitrariness characteristics of traditional machining and forming.

[0077] Aspherical surface: A surface whose curvature changes continuously.

[0078] Mirror center axis: The axis passing through the geometric center of the mirror and parallel to the axis of rotational symmetry.

[0079] Off-axis: It means that the optical axis does not coincide with the center axis.

[0080] Axis of rotational symmetry: A straight line that can make a geometric figure form axial symmetry or rotational symmetry. The geometric figure formed by rotating 360° along this straight line is a rotationally symmetric figure, and this straight line is the axis of rotational symmetry.

[0081] Rotationally symmetric structure: A structure formed by a geometric figure rotating 360° around the axis of rotational symmetry.

[0082] Non-rotationally symmetric structure: A structure that cannot be obtained by line rotation.

[0083] Clear aperture: Along the direction of the mirror center axis, the projection aperture of the incident light beam on the mirror.

[0084] Mirror off-axis amount: Also known as the mirror offset amount, it is the distance between the geometric center of the mirror and the axis of rotational symmetry. That is, the distance between the mirror center axis and the axis of rotational symmetry.

[0085] Total track length (TTL) of the lens: The length on the optical axis from the object side surface of the first optical element facing the object side in the lens to the imaging surface is the total optical length. That is, the total length from the head of the lens barrel to the imaging surface, which is the main factor forming the height of the camera. The total optical length is used to characterize the size of the lens.

[0086] Aperture (aperture stop): A device used to control the amount of light passing through the lens and entering the photosensitive surface inside the camera body. The aperture number F# is the relative value obtained by dividing the focal length of the lens by the clear aperture diameter of the lens (the reciprocal of the relative aperture). The smaller the value of the aperture number F#, the more light enters in the same unit time, enabling the lens to have good performance in low-light environments. The larger the value of the aperture number F#, the smaller the depth of field, and the background of the photo will be blurred.

[0087] The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0088] The embodiments of the present application provide an electronic device. The electronic device can be, for example, a consumer electronic product, a home electronic product, or a vehicle-mounted electronic product, etc., which are electronic products with a photographing or video recording function. Among them, consumer electronic products such as mobile phones, tablets, laptop computers, personal computers (PCs), personal digital assistants (PDAs), desktop monitors, smart wearable products (such as smart watches, smart bracelets), virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, drones, etc. Home electronic products such as smart door locks, TVs, etc. Vehicle-mounted electronic products such as vehicle navigation devices, in-vehicle DVDs, etc. The embodiments of the present application do not make special restrictions on the specific forms of the above-mentioned electronic devices. For the convenience of description in the following embodiments, the electronic device is taken as an example of a mobile phone.

[0089] An example of the structure of an electronic device is as Figure 1A shown. The electronic device 1 mainly includes a display module 2, a middle frame 3, a housing (or called a battery cover, a rear cover) 4, and a cover plate 5.

[0090] The display module 2 has a light-emitting side where the display screen can be seen and a non-light-emitting side disposed opposite to the light-emitting side. The back surface of the display module 2 is close to the middle frame 3, and the cover plate 5 is disposed on the light-emitting side of the display module 2.

[0091] The above display module 2 includes a display panel (DP).

[0092] In a possible embodiment of the present application, the display module 2 is a liquid crystal display module. In this case, the above display screen is a liquid crystal display (LCD). Based on this, the display module 2 further includes a backlight module (BLU) located on the back surface of the liquid crystal display screen (the side far from the side of the LCD for displaying the picture).

[0093] The backlight module can provide light (also called backlight) to the liquid crystal display screen, and each sub-pixel in the liquid crystal display screen can control the light transmittance to realize image display.

[0094] Alternatively, in another possible embodiment of the present application, the display module 2 is an organic light-emitting diode display module. In this case, the above display screen is an organic light-emitting diode (OLED) display screen. Since an electroluminescent layer is provided in each sub-pixel of the OLED display screen, the OLED display screen can achieve self-luminescence after receiving the working voltage. In this case, the above backlight module does not need to be provided in the display module 2 with the OLED display screen.

[0095] The cover plate 5 is located on the side of the display module 2 away from the middle frame 3. The cover plate 5 can be, for example, a cover glass (CG), and the cover glass can have a certain toughness.

[0096] The middle frame 3 is located between the display module 2 and the housing 4. The surface of the middle frame 3 away from the display module 2 is used to mount internal components such as a battery, a printed circuit board (PCB), a camera, and an antenna. After the housing 4 is covered with the middle frame 3, the above internal components are located between the housing 4 and the middle frame 3.

[0097] In some embodiments, the above electronic device 1 further includes electronic devices such as a processor (central processing unit, CPU) chip, a radio frequency chip, a radio frequency power amplifier (power amplifier, PA), a system-on-a-chip (SOC), a power management chip (power management integrated circuits, PMIC), a storage chip (such as a high bandwidth memory (HBM)), an audio processor, a touch screen controller, a NAND flash (flash memory), an image processor, a camera, and a microphone, etc., which are arranged on the printed circuit board. The printed circuit board is used to carry the above electronic devices and complete signal interaction with the above electronic devices.

[0098] Exemplarily, the image processor is communicatively connected to the camera, and the image processor is used to obtain image data from the camera and process the image data. Among them, the communication connection between the camera and the image processor can include data transmission through electrical connection methods such as routing, or data transmission can be achieved through coupling and other means. It can be understood that the camera and the image processor can also be communicatively connected through other means capable of realizing data transmission.

[0099] The image processor optimizes the digital image signal and transmits the processed signal to the display module 2. The image processor can be an image processing chip or a digital signal processing chip. Its function is to timely and quickly transfer the data obtained by the photosensitive chip to the processor chip and refresh the photosensitive chip. Therefore, the performance of the image processor directly affects the picture quality (such as color saturation, clarity, etc.).

[0100] The camera is an indispensable part of the current electronic device 1. In some embodiments, the camera of the electronic device 1 includes a first camera and a second camera. Exemplarily, the first camera is the front camera of the electronic device and is disposed on one side of the printed circuit board close to the display module 2. The second camera is the rear camera of the electronic device 1 and is disposed on one side of the printed circuit board close to the housing 4. In the embodiments of the present application, the number and the setting position of the cameras are not limited and can be reasonably set according to the actual situation.

[0101] Based on this, the embodiments of the present application further provide an imaging module, which is any one of the cameras included in the above-mentioned electronic device 1. As Figure 1B shown, the imaging module 10 includes an optical lens 100, a photosensitive element 20, and a filter 30.

[0102] As Figure 1B shown, the photosensitive element 20 is disposed on the image side of the optical lens 100. Exemplarily, the photosensitive element 20 is disposed on the focal plane of the optical lens 100 to present a clear image.

[0103] Exemplarily, the photosensitive element 20 may include an optical sensor. For example, the optical sensor is an image sensor.

[0104] In some embodiments, as Figure 1B shown, the imaging module 10 further includes a filter 30. The filter 30 is disposed between the optical lens 100 and the photosensitive element 20.

[0105] Exemplarily, the filter 30 is used to filter out the unnecessary wavelength bands in the light to prevent the photosensitive element 20 from generating false colors or ripples, so as to improve the effective resolution and color reducibility.

[0106] The optical lens 100 mainly uses the refraction principle of the lens to form an image, that is, the light forms a clear image on the focal plane through the optical lens, and forms an image through the photosensitive element 20 located on the focal plane.

[0107] In order to enable the electronic device 1 to photograph objects at different distances, the camera of the electronic device 1 may include a short-focus optical lens (the main camera of the electronic device 1) and a long-focus optical lens. The short-focus optical lens is used to photograph objects at a relatively short distance, and the long-focus optical lens is used to photograph objects at a relatively long distance.

[0108] Exemplarily, as Figure 2A shown, when the object to be photographed is relatively close, a short-focus optical lens (the main camera of the electronic device 1) is used for imaging. At this time, the effective focal length can be about 7 mm, for example. Or, exemplarily, as Figure 2B shown, when the object to be photographed is relatively far away, a long-focus optical lens is used for imaging. At this time, the effective focal length can be greater than 20 mm, for example. In this way, the imaging size of the same object can be made basically the same at different shooting distances.

[0109] As the user's requirements for the photographing performance of the electronic device 1 are getting higher and higher, setting a long-focus optical lens has become the development trend of the camera module. Based on this, as Figure 3A shown, an optical lens 100 is schematically shown, which can meet the medium and long-focus photography requirements.

[0110] However, since the imaging of the long-focus optical lens will stretch the axial length of the optical lens, increasing the size of the optical lens, resulting in a relatively large total track length (TTL) of the above optical lens and a relatively large size of the optical lens 100. The photosensitive element 20 is disposed on the focal plane of the optical lens 100, which will cause the size of the camera module 10 to be even larger.

[0111] At the same time, as the user's requirements for the performance and structure of the electronic device 1 are continuously increasing, in order to make the electronic device 1 thinner and lighter, the printed circuit board in the electronic device 1 needs to be disposed as close as possible to the display module 2 and the housing 4. However, since the existing electronic device 1 is gradually developing towards a narrow bezel or even a borderless design, the display module 2 and the housing 4 are very close to the contour edge of the middle frame 3. Therefore, applying the above camera module 10 to the electronic device 1 is contradictory to the current trend of the electronic device 1 towards being thinner and lighter.

[0112] In order to apply the camera module 10 to the thin and light electronic device 1, the increase in the size of the optical lens 100 will cause the camera module 10 of the electronic device 1 to protrude. As Figure 3B shown, the size of the camera module 10 protruding from the housing 4 is greater than 4 mm, which affects the appearance of the electronic device 1 and the user experience.

[0113] Based on this, in order to reduce the size of the camera module 10, the optical lens 100 can adopt a periscope design. Exemplarily, one or more reflectors can be disposed on the optical path to change the propagation direction of the light and fold the optical path. As Figure 4 shown, a reflector is placed on the optical path, and the angle between the reflector and the optical axis is 45°, which can make the transmission angle of the light turn 90°. In this way, the size of the optical lens 100 in the thickness direction of the electronic device 1 can be reduced.

[0114] In some embodiments, the optical lens 100 may include an upright lens and a periscope lens. Exemplarily, the above Figure 3A illustrates an upright lens. Among them, the optical axis direction of the upright lens is parallel to the thickness direction of the electronic device 1, while the optical axis direction of the periscope lens intersects the thickness direction of the electronic device 1, and the periscope lens can be better applied to the thin and light electronic device 1.

[0115] Illustrates a periscope optical lens. As Figure 5 shown, the optical lens 100 includes a prism and a plurality of lenses. The prism is respectively arranged on the object side and the image side of the plurality of lenses. The incident light is reflected by the prism and then incident on the plurality of lenses, and then is reflected by the prism and emitted.

[0116] It is explained here that the prism is used to fold the optical path to reduce the size of the optical lens 100 without generating optical power. The lens is used to generate optical power. In the embodiments of the present application, the number of lenses is not limited. For example, the optical power can be generated by 5, 6 or 7 lenses. The plurality of lenses are coaxially arranged. It is explained here that in actual situations, due to assembly reasons or lens manufacturing process reasons, the optical axes between the lenses may be slightly misaligned. At this time, the lenses can also be regarded as coaxially arranged.

[0117] In this way, the optical axis direction of the optical lens 100 can be changed through the prism, so that the optical axis of the incident light intersects the optical axes of the plurality of lenses, reducing the size of the optical lens 100.

[0118] With the development of technology, the optical lens 100 is gradually developing towards a larger clear aperture and a larger imaging size. Due to the presence of the mirror, the size and clear aperture of the periscope lens are close, resulting in difficulty in reducing the size of the optical lens 100 ( Figure 5 the size of the illustrated optical lens 100 is greater than 11 mm).

[0119] Based on this, in order to further reduce the size of the periscope optical lens, the embodiments of the present application provide an optical lens, which is applied to the above-mentioned imaging module 10. As Figure 6 shown, the optical lens 100 includes a lens 110, a first refractive member 210, a second refractive member 220, and a third refractive member 230 arranged in sequence from the object side to the image side.

[0120] Exemplarily, the lens 110 is used to converge light rays and transmit the converged light rays to the first refractive member 210. The first refractive member 210 is used to reflect the light rays from the lens 110 multiple times and transmit the reflected light rays to the second refractive member 220. The second refractive member 220 is used to transmit the light rays from the first refractive member 210 to the third refractive member 230. The third refractive member 230 is used to reflect the light rays from the second refractive member 220 multiple times and transmit the reflected light rays.

[0121] That is to say, after the light rays are incident on the lens 110, they are converged by the lens 110 and then transmitted to the first refractive member 210. Then the light rays are reflected multiple times within the first refractive member 210 and then transmitted to the second refractive member 220. Next, the light rays are transmitted through the second refractive member 220 and then transmitted to the third refractive member 230. Finally, the light rays are reflected multiple times within the third refractive member 230 and then transmitted.

[0122] The first refractive member 210, the second refractive member 220, and the third refractive member 230 all include free-form surfaces. The light rays emitted from the lens 110 are transmitted after passing through the free-form surfaces of the first refractive member 210, the free-form surface of the second refractive member 220, and the free-form surface of the third refractive member 230 in sequence.

[0123] It should be clarified here that a free-form surface is a surface whose surface shape cannot be continuously processed and has the arbitrariness characteristics of traditional processing and forming.

[0124] Among them, when the light rays are transmitted within the first refractive member 210 and the third refractive member 230, they are reflected multiple times, which can fold the optical path, reduce the size of the optical lens 100, and realize the miniaturization of the optical lens 100. For example, the size of the optical lens 100 can be reduced by more than 30%, reducing the size of the imaging module 10 protruding from the electronic device 1 or making the imaging module 10 flush with the housing of the electronic device 1, thereby improving the user experience of the electronic device 1.

[0125] Among them, the lens 110 has a positive optical power. That is to say, the lens 110 has the function of converging light rays. The lens 110 is used to collect light rays, converge the incident light rays, and make the aperture of the incident light rays gradually become smaller.

[0126] Exemplarily, as Figure 6 shown, the optical lens 100 may include one lens.

[0127] Alternatively, exemplarily, the optical lens 100 may include multiple lenses, that is, a lens group.

[0128] In the embodiments of the present application, the number of lenses included in the optical lens 100 is not limited and can be reasonably set according to actual situations.

[0129] In the embodiments of the present application, when the optical lens 100 includes a plurality of lenses, the lenses are coaxially arranged. Exemplarily, the plurality of lenses are arranged in sequence along the optical axis.

[0130] Each lens includes an object side surface facing the object side and an image side surface facing the image side.

[0131] It can be understood that the object side surface of any one of the plurality of lenses can be any one of a convex surface, a concave surface, or a flat surface. The image side surface of any one of the plurality of lenses can also be any one of a convex surface, a concave surface, or a flat surface. The embodiments of the present application do not make any limitations in this regard, and can be reasonably set according to the actual situation.

[0132] It is hereby clarified that in the embodiments of the present application, the optical power of each lens is not limited, as long as the lens 110 has a positive optical power.

[0133] The plurality of lenses in the embodiments of the present application are all lenses with positive or negative optical power. When a plane mirror is inserted between multiple lenses, the plane mirror is not regarded as a lens of the optical lens 100 of the present application.

[0134] For the convenience of illustration below, the optical lens 100 is described as including one lens.

[0135] Exemplarily, both the object side surface and the image side surface of the lens 110 are aspherical surfaces.

[0136] In this way, spherical aberration can be balanced, the incident angle of light can be adjusted, the design freedom of the optical lens 100 can be increased, and the imaging quality can be improved.

[0137] Exemplarily, both the object side surface and the image side surface of the lens 110 are rotationally symmetric surfaces.

[0138] For example, both the object side surface and the image side surface of the lens 110 are rotationally symmetric aspherical surfaces.

[0139] In this way, the imaging effect can be improved and spherical aberration can be reduced.

[0140] Exemplarily, the object side surface of the lens 110 is a convex surface.

[0141] In this way, the imaging effect is good and the imaging quality can be improved.

[0142] Regarding the first refractive member 210, continue to refer to Figure 6 , the first refractive member 210 includes a first incident surface 211, a first exit surface 212, and a first reflection surface 213. The first incident surface 211, the first exit surface 212, and the first reflection surface 213 all intersect.

[0143] Exemplarily, the first refractive member 210 may include a prism. For example, the prism may include any one of a triangular prism, a quadrangular prism, a pentagonal prism, etc. That is to say, the first incident surface 211, the first exit surface 212, and the first reflection surface 213 may be any three intersecting side surfaces of the prism.

[0144] Alternatively, exemplarily, the first refractive member 210 may be a combination of the first incident surface 211, the first exit surface 212, and the first reflection surface 213.

[0145] As Figure 6 shown, the first incident surface 211 is arranged facing the lens 110, and the first exit surface 212 is arranged facing the second refractive member 220.

[0146] Exemplarily, the first incident surface 211 is configured to transmit the light rays from the lens 110 to the first reflection surface 213. The first reflection surface 213 is configured to reflect at least part of the light rays from the first incident surface 211 to the first incident surface 211. The first incident surface 211 is further configured to reflect at least part of the light rays from the first reflection surface 213 to the first exit surface 212. The first exit surface 212 is configured to transmit at least part of the light rays from the first incident surface 211 to the second refractive member 220.

[0147] That is to say, as Figure 7 shown, the light rays exiting from the lens 110 are incident on the first incident surface 211 of the first refractive member 210. After being transmitted by the first incident surface 211, the light rays are transmitted to the first reflection surface 213 of the first refractive member 210. Then, after being reflected by the first reflection surface 213, the light rays are transmitted to the first incident surface 211 of the first refractive member 210. Then, after being reflected by the first incident surface 211, the light rays are transmitted to the first exit surface 212. Finally, the light rays are transmitted through the first exit surface 212.

[0148] Among them, the first reflection surface 213 may be configured to reflect part of the light rays from the first incident surface 211 to the first incident surface 211, or may reflect all of the light rays from the first incident surface 211 to the first incident surface 211, which is related to the incident angle of the light rays on the first reflection surface 213. The first incident surface 211 may be configured to reflect part of the light rays from the first reflection surface 213 to the first exit surface 212, or may reflect all of the light rays from the first incident surface 211 to the first exit surface 212, which is related to the incident angle of the light rays on the first incident surface 211.

[0149] It is hereby clarified that both the first reflecting surface 213 and the first incident surface 211 serve as reflecting surfaces, and the reflecting surface is a reflecting surface through which light can pass when irradiated at a preset angle. For example, when the incident angle of light is greater than or equal to the preset angle, total internal reflection (TIR) can occur, that is, all light passing through the reflecting surface is reflected. When the incident angle of light is less than the preset angle, the light is transmitted through the reflecting surface.

[0150] When the light is transmitted from the first incident surface 211 and then transmitted to the first reflecting surface 213, the incident angle of the light on the first reflecting surface 213 is greater than or equal to the preset angle, and the light is totally reflected by the first reflecting surface 213. When the light is reflected from the first reflecting surface 213 and then transmitted to the first incident surface 211, the incident angle of the light on the first incident surface 211 is greater than or equal to the preset angle, and the light is totally reflected by the first incident surface 211. When the light is reflected from the first incident surface 211 and then transmitted to the first exit surface 212, the incident angle of the light on the first exit surface 212 is less than the preset angle, and the light is transmitted through the first exit surface 212.

[0151] Therefore, as Figure 7 shown, the light undergoes at least two total internal reflections within the first refractive element 210, and the light is folded at least twice, which can increase the path of the light and reduce the size of the optical lens 100.

[0152] In the embodiment of the present application, the first refractive element 210 includes a free-form surface. For example, at least one of the surfaces of the first refractive element 210 is a free-form surface. That is to say, at least one of the first incident surface 211, the first exit surface 212, and the first reflecting surface 213 is a free-form surface.

[0153] In this way, the free-form surface can well balance the chromatic aberration and field curvature of the optical lens 100.

[0154] Exemplarily, the first incident surface 211 is a free-form surface. Or, the first exit surface 212 is a free-form surface. Or, the first reflecting surface 213 is a free-form surface.

[0155] Or, exemplarily, the first incident surface 211 and the first exit surface 212 are free-form surfaces. Or, the first incident surface 211 and the first reflecting surface 213 are free-form surfaces. Or, the first exit surface 212 and the first reflecting surface 213 are free-form surfaces.

[0156] Or, exemplarily, all the surfaces of the first refractive element 210 are free-form surfaces. That is, the first incident surface 211, the first exit surface 212, and the first reflecting surface 213 are all free-form surfaces.

[0157] In this way, the chromatic aberration and field curvature of the optical lens 100 can be further balanced.

[0158] In some embodiments, at least one surface of the first refractive member 210 is an off-axis non-rotationally symmetric freeform surface. That is, at least one of the first incident surface 211, the first exit surface 212, and the first reflection surface 213 is an off-axis non-rotationally symmetric freeform surface.

[0159] It should be clarified here that an off-axis non-rotationally symmetric freeform surface refers to a freeform surface whose several centers of the surface do not coincide with the optical axis and cannot be obtained by rotation. The off-axis non-rotationally symmetric freeform surface can provide design freedom, increase the optical field of view, and correct system aberrations.

[0160] Exemplarily, the first incident surface 211 is an off-axis non-rotationally symmetric freeform surface. Or, the first exit surface 212 is an off-axis non-rotationally symmetric freeform surface. Or, the first reflection surface 213 is an off-axis non-rotationally symmetric freeform surface.

[0161] Or, exemplarily, the first incident surface 211 and the first exit surface 212 are off-axis non-rotationally symmetric freeform surfaces. Or, the first incident surface 211 and the first reflection surface 213 are off-axis non-rotationally symmetric freeform surfaces. Or, the first exit surface 212 and the first reflection surface 213 are off-axis non-rotationally symmetric freeform surfaces.

[0162] Or, exemplarily, all surfaces of the first refractive member 210 are off-axis non-rotationally symmetric freeform surfaces. That is, the first incident surface 211, the first exit surface 212, and the first reflection surface 213 are all off-axis non-rotationally symmetric freeform surfaces.

[0163] In this way, the aberration can be further corrected, and the design freedom can be improved.

[0164] The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0165] Regarding the second refractive member 220, continue to refer to Figure 6 , the second refractive member 220 includes a second incident surface 221 and a second exit surface 222.

[0166] Exemplarily, the second refractive member 220 may include a prism. For example, the prism may include any one of a triangular prism, a quadrangular prism, or a pentagonal prism, etc. That is, the second incident surface 221 and the second exit surface 222 may be any intersecting side surfaces of the prism.

[0167] Or, exemplarily, the second refractive member 220 may be a combination of the second incident surface 221 and the second exit surface 222.

[0168] Such as Figure 6As shown, the second incident surface 221 is arranged facing the first refractive member 210, and the second exit surface 222 is arranged facing the third refractive member 230.

[0169] Exemplarily, the second incident surface 221 is configured to transmit light rays from the first refractive member 210 to the second exit surface 222, and the second exit surface 222 is configured to transmit at least part of the light rays from the second incident surface 221 to the third refractive member 230.

[0170] That is to say, as Figure 7 shown, the light rays exiting from the first refractive member 210 are incident on the second incident surface 221 of the second refractive member 220, and after being transmitted through the second incident surface 221, the light rays are transmitted to the second exit surface 222. Then the light rays are transmitted through the second exit surface 222.

[0171] Therefore, as Figure 7 shown, after the light rays from the first refractive member 210 are transmitted through the second refractive member 220, they are transmitted to the third refractive member 230.

[0172] It should be clarified here that the second refractive member 220 may further include a reflective surface so that the light rays are refracted multiple times within the second refractive member 220 and then exit. The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0173] In the embodiments of the present application, the second refractive member 220 includes a free-form surface. For example, at least one surface of the surfaces of the second refractive member 220 is a free-form surface. That is to say, the second incident surface 221 or the second exit surface 222 is a free-form surface.

[0174] In this way, the free-form surface can balance the chromatic aberration and field curvature of the optical lens 100.

[0175] Exemplarily, the second incident surface 221 is a free-form surface. Or, the second exit surface 222 is a free-form surface.

[0176] Or, exemplarily, all the surfaces of the second refractive member 220 are free-form surfaces. That is, both the second incident surface 221 and the second exit surface 222 are free-form surfaces.

[0177] In this way, the chromatic aberration and field curvature of the optical lens 100 can be further balanced.

[0178] In some embodiments, at least one surface of the surfaces of the second refractive member 220 is an off-axis non-rotationally symmetric free-form surface. That is to say, the second incident surface 221 or the second exit surface 222 is an off-axis non-rotationally symmetric free-form surface.

[0179] In this way, the aberration can be corrected and the design freedom can be improved.

[0180] Exemplarily, the second incident surface 221 is an off-axis non-rotationally symmetric free-form surface. Alternatively, the second exit surface 222 is an off-axis non-rotationally symmetric free-form surface.

[0181] Alternatively, exemplarily, all surfaces of the second refractive element 220 are off-axis non-rotationally symmetric free-form surfaces. That is, both the second incident surface 221 and the second exit surface 222 are off-axis non-rotationally symmetric free-form surfaces.

[0182] In this way, aberration can be further corrected and the design freedom can be improved.

[0183] The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0184] Regarding the third refractive element 230, continue to refer to Figure 6 , the third refractive element 230 includes a third incident surface 231, a third exit surface 232, and a third reflection surface 233. The third incident surface 231, the third exit surface 232, and the third reflection surface 233 all intersect.

[0185] Exemplarily, the third refractive element 230 may include a prism. For example, the prism may include any one of a triangular prism, a quadrangular prism, or a pentagonal prism, etc. That is to say, the third incident surface 231, the third exit surface 232, and the third reflection surface 233 may be any three intersecting side surfaces of the prism.

[0186] Alternatively, exemplarily, the third refractive element 230 may be a combination of the third incident surface 231, the third exit surface 232, and the third reflection surface 233.

[0187] Exemplarily, the third incident surface 231 is used to transmit the light from the second refractive element 220 to the third exit surface 232. The third exit surface 232 is used to reflect at least part of the light from the third incident surface 231 to the third reflection surface 233. The third reflection surface 233 is used to reflect at least part of the light from the third exit surface 232 to the third exit surface 232. The third exit surface 232 is also used to transmit at least part of the light from the third incident surface 231.

[0188] That is to say, as Figure 7 shown, the light exiting from the second refractive element 220 is incident on the third incident surface 231 of the third refractive element 230. After being transmitted through the third incident surface 231, the light is transmitted to the third exit surface 232 of the third refractive element 230. Then, after being reflected by the third exit surface 232, the light is transmitted to the third reflection surface 233 of the third refractive element 230. Then, after being reflected by the third reflection surface 233, the light is transmitted to the third exit surface 232. Finally, the light is transmitted through the third exit surface 232.

[0189] Among them, the third exit surface 232 can be used to reflect part of the light rays from the third entrance surface 231 to the third reflection surface 233, or all of the light rays from the third entrance surface 231 to the third reflection surface 233, which is related to the incident angle of the light rays incident on the third exit surface 232. The third reflection surface 233 can be used to reflect part of the light rays from the third exit surface 232 to the third exit surface 232, or all of the light rays from the third exit surface 232 to the third exit surface 232, which is related to the incident angle of the light rays incident on the third reflection surface 233.

[0190] It is explained here that both the third exit surface 232 and the third reflection surface 233 serve as reflection surfaces, and this reflection surface is a reflection surface through which light can pass when irradiated at a preset angle. For example, when the incident angle of the light rays is greater than or equal to the preset angle, total internal reflection of the light rays can occur, that is, all the light rays passing through this reflection surface are reflected. When the incident angle of the light rays is less than the preset angle, the light rays are transmitted through this reflection surface.

[0191] The light rays are transmitted from the third entrance surface 231 and then transmitted to the third exit surface 232. The incident angle of the light rays on the third exit surface 232 is greater than or equal to the preset angle, and the light rays are totally internally reflected by the third exit surface 232. The light rays are reflected from the third exit surface 232 and then transmitted to the third reflection surface 233. The incident angle of the light rays on the third reflection surface 233 is greater than or equal to the preset angle, and the light rays are totally internally reflected by the third reflection surface 233. When the light rays are reflected from the third reflection surface 233 and then transmitted to the third exit surface 232, the incident angle of the light rays on the third exit surface 232 is less than the preset angle, and the light rays are transmitted through the third exit surface 232.

[0192] Therefore, as Figure 7 shown, the light rays undergo at least two total internal reflections within the third refractive element 230, and the light rays are folded at least twice, which can increase the path of the light rays and reduce the size of the optical lens 100.

[0193] Exemplarily, as Figure 7 shown, a photosensitive element 20 is further provided on the image side of the optical lens 100.

[0194] The photosensitive element 20 can include, for example, a detector or a sensor, etc.

[0195] As Figure 7 shown, the photosensitive element 20 is disposed on the light-emitting side of the third refractive element 230. That is, the photosensitive element 20 is disposed outside the third exit surface 232 of the third refractive element 230. The light rays exiting from the third refractive element 230 converge on the photosensitive element 20.

[0196] In the embodiments of the present application, the third refractive element 230 includes a free-form surface. For example, at least one surface of the third refractive element 230 is a free-form surface. That is to say, at least one of the third incident surface 231, the third exit surface 232, and the third reflection surface 233 is a free-form surface.

[0197] In this way, the chromatic aberration and field curvature of the optical lens 100 can be balanced.

[0198] Exemplarily, the third incident surface 231 is a free-form surface. Or, the third exit surface 232 is a free-form surface. Or, the third reflection surface 233 is a free-form surface.

[0199] Or, exemplarily, the third incident surface 231 and the third exit surface 232 are free-form surfaces. Or, the third incident surface 231 and the third reflection surface 233 are free-form surfaces. Or, the third exit surface 232 and the third reflection surface 233 are free-form surfaces.

[0200] Or, exemplarily, all surfaces of the third refractive element 230 are free-form surfaces. That is, the third incident surface 231, the third exit surface 232, and the third reflection surface 233 are all free-form surfaces.

[0201] In this way, the chromatic aberration and field curvature of the optical lens 100 can be further balanced.

[0202] In some embodiments, at least one surface of the third refractive element 230 is an off-axis non-rotationally symmetric free-form surface. That is to say, at least one of the third incident surface 231, the third exit surface 232, and the third reflection surface 233 is an off-axis non-rotationally symmetric free-form surface.

[0203] In this way, the aberration can be corrected and the design freedom can be improved.

[0204] Exemplarily, the third incident surface 231 is an off-axis non-rotationally symmetric free-form surface. Or, the third exit surface 232 is an off-axis non-rotationally symmetric free-form surface. Or, the third reflection surface 233 is an off-axis non-rotationally symmetric free-form surface.

[0205] Or, exemplarily, the third incident surface 231 and the third exit surface 232 are off-axis non-rotationally symmetric free-form surfaces. Or, the third incident surface 231 and the third reflection surface 233 are off-axis non-rotationally symmetric free-form surfaces. Or, the third exit surface 232 and the third reflection surface 233 are off-axis non-rotationally symmetric free-form surfaces.

[0206] Or, exemplarily, all surfaces of the third refractive element 230 are off-axis non-rotationally symmetric free-form surfaces. That is, the third incident surface 231, the third exit surface 232, and the third reflection surface 233 are all off-axis non-rotationally symmetric free-form surfaces.

[0207] In this way, aberration can be further corrected and the design freedom can be improved.

[0208] The embodiments of the present application do not limit this, and it can be reasonably set according to the actual situation.

[0209] In the embodiments of the present application, the lens 110 has a focal power and can provide a focal power for the optical path. At least part of the surfaces of the first refractive member 210, the second refractive member 220, and the third refractive member 230 have a focal power and can provide a focal power for the optical path. The long-focus optical lens 100 is realized through the mutual cooperation of the lens 110 with the first refractive member 210, the second refractive member 220, and the third refractive member 230.

[0210] In some embodiments, the refractive index n0 of the light in the lens 110, the refractive index n1 of the light in the first refractive member 210, the refractive index n2 of the light in the second refractive member 220, and the refractive index n3 of the light in the third refractive member 230 satisfy: n1 < n2 < n0 < n3.

[0211] In this way, chromatic aberration and field curvature can be balanced, the aperture of the optical lens 100 can be increased, and the size of the optical lens 100 can be reduced.

[0212] Exemplarily, the first refractive member 210, the second refractive member 220, and the third refractive member 230 are arranged at intervals.

[0213] That is to say, there are gaps between the first refractive member 210 and the second refractive member 220 and between the second refractive member 220 and the third refractive member 230.

[0214] Or, exemplarily, the first refractive member 210, the second refractive member 220, and the third refractive member 230 are arranged in a fitting manner.

[0215] That is to say, the first exit surface 212 and the second entrance surface 221 are fitted, and the second exit surface 222 and the third entrance surface 231 are fitted. For example, they can be bonded using an adhesive.

[0216] To facilitate the understanding of the optical lens 100 provided by the embodiments of the present application, simulations are performed on it, and the simulation effects are described below.

[0217] The following Table 1 shows the optical parameters of the optical lens 100 provided by the embodiments of the present application.

[0218] Among them, FOV is the field of view angle of the optical lens 100; F# is the aperture value of the optical lens 100; CRA is the chief ray angle of the optical lens 100; MTF is the modulation transfer function of the optical lens 100; the frequency of MTF is 125lps / mm; PIH is the semi-image height of the optical lens 100.

[0219] Table 1

[0220] FOV 21.8x16.7° Focal length 20.31 mm Entrance pupil diameter 9.62 mm F# 2.1 Length 28.5 mm Thickness 7.79 mm CRA <6° Distortion DIS < 1% MTF >0.65 PIH 4.13x3.1

[0221] Figure 8A Shown is the structure of the optical lens 100 adopted Figure 6 and the modulation transfer function (MTF) curve graph of the optical lens 100. Figure 8A The abscissa is the spatial frequency, with the unit of line pairs per millimeter (Lp / mm), and the ordinate is the modulation transfer function. Each line in the figure represents the relationship between the modulation transfer function and the spatial frequency at different field angles.

[0222] From Figure 8A the MTF curve of the optical lens 100 shown, it can be seen that the MTF coefficient is above 0.6, the imaging of the optical lens 100 is clear, and a good imaging effect can be obtained.

[0223] Figure 8B Shown is the structure of the optical lens 100 adopted Figure 6 and the distortion grid graph of the optical lens 100. Figure 8B The abscissa is the horizontal FOV, with the unit of millimeter (mm), and the ordinate is the vertical FOV, with the unit of millimeter (mm).

[0224] From Table 1 and Figure 8B it can be seen that the distortion is less than 1%. The distortion of the optical lens 100 provided by the embodiment of the present application is well corrected, the imaging distortion is small, and the requirement of low distortion is met.

[0225] The optical lens 100 provided by the embodiment of the present application adopts three refractive components to cooperate with each other. The aperture can reach F2.1, the distortion can be effectively corrected, and better optical performance can be obtained. At the same time, it meets the requirements of large aperture, high reliability and low size. Exemplarily, the optical lens 100 provided by the embodiment of the present application can reduce the size by more than 4 mm, reduce the height by more than 3 mm, and double the imaging size, for example, the imaging size is more than 10 mm.

[0226] The optical lens 100 provided by the embodiments of the present application includes a lens 110 with a positive optical power, a first refractive member 210 with a free-form surface, a second refractive member 220 with a free-form surface, and a third refractive member 230 with a free-form surface, which are arranged in sequence from the object side to the image side. After the light is output from the lens 110, it is incident on the first refractive member 210. After the light is reflected multiple times in the first refractive member 210, it is incident on the second refractive member 220, and then transmitted through the second refractive member 220 and transmitted to the third refractive member 230, and is output after being reflected multiple times in the third refractive member 230. When the light is transmitted in the first refractive member 210 and the third refractive member 230, multiple reflections occur, which can fold the optical path, reduce the size of the optical lens 100, and realize the miniaturization of the optical lens 100. The optical lens 100 provided by the embodiments of the present application includes multiple free-form surfaces. When the light is transmitted through the multiple free-form surfaces, the degree of freedom for aberration correction can be increased. Furthermore, on the premise of ensuring the imaging quality, a larger light transmission amount can be realized, and the imaging size of the optical lens 100 can be increased.

[0227] The embodiments of the present application also provide an optical lens, as Figure 9 shown, including a lens 110, a first refractive member 210, and a third refractive member 230, which are arranged in sequence from the object side to the image side.

[0228] Among them, the lens 110 has a positive optical power, can converge the light, and transmit the converged light to the first refractive member 210. The first refractive member 210 is used to reflect the light from the lens 110 multiple times and transmit the reflected light to the third refractive member 230. The third refractive member 230 is used to reflect the light from the first refractive member 210 multiple times and transmit the reflected light.

[0229] That is to say, as Figure 10 shown, after the light is incident on the lens 110, it is converged by the lens 110 and then transmitted to the first refractive member 210. Then the light is reflected multiple times in the first refractive member 210 and then transmitted to the third refractive member 230. Finally, the light is reflected multiple times in the third refractive member 230 and then transmitted.

[0230] Among them, when the light is transmitted in the first refractive member 210 and the third refractive member 230, multiple reflections occur, which can fold the optical path. At the same time, the first refractive member 210 and the third refractive member 230 are attached to each other, reducing the size of the optical lens 100 and realizing the miniaturization of the optical lens 100. For example, the size of the optical lens 100 can be reduced by more than 7%.

[0231] The descriptions of the lens 110, the first refractive member 210, and the third refractive member 230 are the same as above, and reference can be made to the relevant descriptions of the lens 110, the first refractive member 210, and the third refractive member 230 above.

[0232] Among them, the first refractive element 210 includes a free-form surface, and the third refractive element 230 includes a free-form surface.

[0233] Exemplarily, the first refractive element 210 includes a first incident surface 211, a first exit surface 212, and a first reflection surface 213.

[0234] As Figure 10 shown, the first incident surface 211 is configured to transmit light rays from the lens 110 to the first reflection surface 213, the first reflection surface 213 is configured to reflect at least part of the light rays from the first incident surface 211 to the first incident surface 211, the first incident surface 211 is further configured to reflect at least part of the light rays from the first reflection surface 213 to the first exit surface 212, and the first exit surface 212 is configured to transmit at least part of the light rays from the first incident surface 211 to the third refractive element 230.

[0235] Exemplarily, the third refractive element 230 includes a third incident surface 231, a third exit surface 232, and a third reflection surface 233.

[0236] As Figure 10 shown, the third incident surface 231 is configured to transmit light rays from the first refractive element 210 to the third exit surface 232, the third exit surface 232 is configured to reflect at least part of the light rays from the third incident surface 231 to the third reflection surface 233, the third reflection surface 233 is configured to reflect at least part of the light rays from the third exit surface 232 to the third exit surface 232, and the third exit surface 232 is further configured to transmit at least part of the light rays from the third incident surface 231.

[0237] In the embodiments of the present application, the first refractive element 210 and the third refractive element 230 are disposed in a fitting manner.

[0238] Exemplarily, the first exit surface 212 and the third incident surface 231 are in contact. For example, they can be bonded using an adhesive.

[0239] It should be clarified here that the shape of the first exit surface 212 is opposite to the shape of the third incident surface 231, that is, the first exit surface 212 and the third incident surface 231 are complementary. For example, the first exit surface 212 is a convex surface and the third incident surface 231 is a concave surface. Or, the first exit surface 212 is a concave surface and the third incident surface 231 is a convex surface. In the embodiments of the present application, the shapes of the first exit surface 212 and the third incident surface 231 are not limited, as long as it is ensured that the first exit surface 212 and the third incident surface 231 can fit exactly.

[0240] In the embodiment of the present application, the lens 110 has optical power and can provide optical power for the optical path. At least part of the surface of the first refraction element 210 and the third refraction element 230 has optical power and can provide optical power for the optical path. The optical lens 100 with a long focus is realized by the cooperation between the lens 110, the first refraction element 210 and the third refraction element 230.

[0241] In some embodiments, the refractive index n0 of the light in the lens 110, the refractive index n1 of the light in the first refraction element 210, and the refractive index n3 of the light in the third refraction element 230 satisfy: n1 <n0<n3。

[0242] In this way, chromatic aberration and field curvature can be balanced, the aperture of the optical lens 100 can be increased, and the size of the optical lens 100 can be reduced.

[0243] To facilitate understanding of the optical lens 100 provided in the embodiment of the present application, a simulation is performed, and the simulation effect is described below.

[0244] The following Table 2 lists the optical parameters of the optical lens 100 provided in the embodiment of the present application.

[0245] Among them, FOV is the field of view of the optical lens 100; F# is the aperture value of the optical lens 100; CRA is the main light angle of the optical lens 100; MTF is the modulation transfer function of the optical lens 100; the frequency of MTF is 90lps / mm; PIH is the half image height of the optical lens 100.

[0246] Table 2

[0247] FOV 21.8x16.7° Focal length 20 mm Entrance pupil diameter 9 mm F# 2.22 Length 25.8 mm Thickness 7 mm CRA <20.0° Distortion DIS~0 MTF >0.55 PIH 4.00x3.00

[0248] Figure 11A The shown is the Figure 9 The structure of the optical lens 100 is shown, and a modulation transfer function (MTF) curve of the optical lens 100 is shown. Figure 11A The horizontal axis is the spatial frequency, in units of line pairs per millimeter (Lp / mm), and the vertical axis is the modulation transfer function. Each line in the figure represents the relationship between the modulation transfer function and the spatial frequency at different field angles.

[0249] from Figure 11A It can be seen from the MTF curve of the optical lens 100 that the MTF coefficient is above 0.5, and the imaging of the optical lens 100 is clear and has a good imaging effect.

[0250] Figure 11B The shown is the Figure 9 The structure of the optical lens 100 and the distortion grid diagram of the optical lens 100 are shown. Figure 11BThe abscissa is the horizontal FOV, with the unit of millimeter (mm), and the ordinate is the vertical FOV, with the unit of millimeter (mm).

[0251] From Table 2 and Figure 11B it can be seen that the distortion is approximately equal to 0. The distortion of the optical lens 100 provided by the embodiment of the present application is well corrected, with small imaging distortion, meeting the requirements of low distortion.

[0252] The optical lens 100 provided by the embodiment of the present application adopts two mutually attached refractive elements, the aperture can reach F2.22, the distortion can be effectively corrected, better optical performance can be obtained, and at the same time, large aperture, high reliability and small size are satisfied.

[0253] The optical lens 100 provided by the embodiment of the present application includes a lens 110 with positive optical power, a first refractive element 210 with a free-form surface, and a third refractive element 230 with a free-form surface, which are arranged in sequence from the object side to the image side. After the light exits from the lens 110, it is incident on the first refractive element 210, and after multiple reflections in the first refractive element 210, it is incident on the third refractive element 230, and after multiple reflections in the third refractive element 230, it exits. When the light is transmitted in the first refractive element 210 and the third refractive element 230, multiple reflections occur, which can fold the optical path, reduce the size of the optical lens 100, and realize the miniaturization of the optical lens 100. In addition, the fitting of the first refractive element 210 and the third refractive element 230 can further reduce the size of the optical lens 100 and at the same time reduce the assembly difficulty. The optical lens 100 provided by the embodiment of the present application includes multiple free-form surfaces. After the light passes through the transmission of multiple free-form surfaces, the degree of freedom of aberration correction can be increased, and then, on the premise of ensuring the imaging quality, a larger light passing amount can be realized, and the imaging size of the optical lens 100 can be increased.

[0254] The embodiment of the present application also provides a packaging structure of an optical lens, which can be used to package the above-mentioned optical lens 100. As Figure 12A and Figure 12B shown, the packaging structure 200 of the optical lens includes a lens barrel 310 provided with a receiving cavity 311 and a guide rail 320 arranged inside the lens barrel 310. Among them, a limiting hole 312 is opened on the side wall of the lens barrel 310. The limiting hole 312 penetrates the side wall of the lens barrel 310 and communicates with the receiving cavity 311.

[0255] Exemplarily, the receiving cavity 311 is used to place the refractive elements of the optical lens 100 (one or more of the above-mentioned first refractive element 210, second refractive element 220, and third refractive element 230)).

[0256] The guide rail 320 is used to connect the above-mentioned refractive elements so that the above-mentioned refractive elements can move along the extending direction of the lens barrel 310.

[0257] Among them, the refractive member is connected to the lens barrel 310 through the guide rail 320, and at the same time, the refractive member can be fixed inside the lens barrel 310 through the guide rail 320.

[0258] Exemplarily, the limiting hole 312 is used to place the lens 110 of the optical lens 100.

[0259] Among them, the limiting hole 312 is the light incident side (object side) of the optical lens 100.

[0260] The shape of the limiting hole 312 can be the same as the shape of the lens 110, for example. In the embodiments of the present application, the shape of the limiting hole 312 is not limited, and it can be reasonably set according to the actual situation.

[0261] In some embodiments, the encapsulation structure 200 further includes a light shielding sheet 330.

[0262] As Figure 12A shown, the light shielding sheet 330 is disposed outside the lens barrel 310.

[0263] The material of the light shielding sheet 330 can include a light shielding material, for example, to avoid interfering with the light incident into the optical lens 100.

[0264] In some embodiments, the side wall of the lens barrel 310 is further provided with a light outlet hole 313, and the encapsulation structure 200 further includes a filter 340.

[0265] As Figure 12A shown, the filter 340 is disposed in the light outlet hole 313.

[0266] The filter 30 is used to filter out unnecessary wavelength bands in the light, prevent the photosensitive element 20 from generating false colors or ripples, so as to improve the effective resolution and color reducibility.

[0267] The embodiments of the present application further provide a method for encapsulating an optical lens. As Figure 13 shown, the encapsulation method includes:

[0268] S1. Install the lens 110 in the limiting hole 312.

[0269] That is to say, the light incident side of the optical lens 100, that is, the object side, is determined.

[0270] S2. Fix the refractive member on the guide rail 320.

[0271] In some embodiments, the refractive members of the optical lens 100 include a first refractive member 210, a second refractive member 220, and a third refractive member 230.

[0272] Exemplarily, the first refractive element 210 and the third refractive element 230 can be fixed on the guide rail 320 first, and there is a gap between the first refractive element 210 and the third refractive element 230. Then, by means of active coupling, the position of the second refractive element 220 is adjusted according to the imaging quality to make the imaging quality better. Finally, the second refractive element 220 is fixed on the guide rail 320.

[0273] In some other embodiments, the refractive elements of the optical lens 100 include a first refractive element 210 and a third refractive element 230.

[0274] Exemplarily, the first exit surface 212 of the first refractive element 210 can be attached to the third entrance surface 231 of the third refractive element 230 first, and then the first refractive element 210 and the third refractive element 230 are fixed on the guide rail 320.

[0275] It should be clarified here that after the refractive element is fixed, the refractive element is placed in the lens barrel 310 through the guide rail 320.

[0276] S3. The light shielding sheet 330 is disposed outside the lens barrel 310.

[0277] S4. The filter 340 is disposed at the light exit hole 313 of the lens barrel 310.

[0278] S5. The photosensitive element 20 is disposed on the side of the filter 340 away from the refractive element.

[0279] The packaging structure 200 of the optical lens provided by the embodiment of the present application has a simple structure. The refractive element is fixed on the lens barrel 310 through the guide rail 320, which is convenient for assembly and has strong applicability.

[0280] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An optical lens, characterized in that, Comprising: A lens, a first refractive member, a second refractive member, and a third refractive member arranged in sequence from the object side to the image side; The lens has a positive optical power; The first refractive member includes a free-form surface; the first refractive member is configured to reflect light from the lens multiple times and transmit the reflected light to the second refractive member; The second refractive member includes a free-form surface; the second refractive member is configured to transmit light from the first refractive member to the third refractive member; The third refractive member includes a free-form surface; the third refractive member is configured to reflect light from the second refractive member multiple times and transmit the reflected light; Wherein, the light emitted from the lens is transmitted after passing through the free-form surface of the first refractive member, the free-form surface of the second refractive member, and the free-form surface of the third refractive member in sequence.

2. The optical lens according to claim 1, wherein The first refractive member includes a first incident surface, a first exit surface, and a first reflection surface; the first incident surface is disposed facing the lens, and the first exit surface is disposed facing the second refractive member; the first incident surface, the first exit surface, and the first reflection surface all intersect; at least one of the first incident surface, the first exit surface, and the first reflection surface is a free-form surface; The first incident surface is configured to transmit light from the lens to the first reflection surface; The first reflection surface is configured to reflect at least part of the light from the first incident surface to the first incident surface; The first incident surface is further configured to reflect at least part of the light from the first reflection surface to the first exit surface; The first exit surface is configured to transmit at least part of the light from the first incident surface to the second refractive member.

3. The optical lens according to claim 1 or 2, characterized in that, The second refractive member includes a second incident surface and a second exit surface; the second incident surface is disposed facing the first refractive member, and the second exit surface is disposed facing the third refractive member; the second incident surface or the second exit surface is a free-form surface; The second incident surface is configured to transmit light from the first refractive member to the second exit surface; The second exit surface is configured to transmit at least part of the light from the second incident surface to the third refractive member.

4. The optical lens according to claim 1, wherein The third refractive member includes a third incident surface, a third exit surface, and a third reflection surface; the third incident surface is disposed facing the second refractive member; the third incident surface, the third exit surface, and the third reflection surface all intersect; at least one of the third incident surface, the third exit surface, and the third reflection surface is a free-form surface; The third incident surface is configured to transmit light from the second refractive member to the third exit surface; The third exit surface is configured to reflect at least part of the light from the third incident surface to the third reflection surface; The third reflection surface is configured to reflect at least part of the light from the third exit surface to the third exit surface; The third exit surface is further configured to transmit at least part of the light from the third reflection surface.

5. The optical lens according to claim 1, wherein All surfaces of the first refractive member are free-form surfaces; And / or All surfaces of the second refractive element are free-form surfaces; and / or, All surfaces of the third refractive element are free-form surfaces.

6. The optical lens according to claim 1, wherein At least one surface of the first refractive element is an off-axis non-rotationally symmetric free-form surface; and / or, At least one surface of the second refractive element is an off-axis non-rotationally symmetric free-form surface; and / or, At least one surface of the third refractive element is an off-axis non-rotationally symmetric free-form surface.

7. The optical lens according to claim 1, wherein The refractive index n0 of the light in the lens, the refractive index n1 of the light in the first refractive element, the refractive index n2 of the light in the second refractive element, and the refractive index n3 of the light in the third refractive element satisfy: n1 < n2 < n0 < n3.

8. The optical lens according to claim 1, characterized in that, Both the object side and the image side of the lens are aspherical surfaces.

9. The optical lens according to claim 1, characterized in that, Both the object side and the image side of the lens are rotationally symmetric surfaces.

10. The optical lens according to claim 1, characterized in that, The object side of the lens is a convex surface.

11. The optical lens according to claim 1, characterized in that, The first refractive element includes a first incident surface, a first exit surface, and a first reflection surface; the first incident surface faces the lens, and the first exit surface faces the second refractive element; the second refractive element includes a second incident surface and a second exit surface; the second incident surface faces the first refractive element, and the second exit surface faces the third refractive element; the third refractive element includes a third incident surface, a third exit surface, and a third reflection surface; the third incident surface faces the second refractive element; the first exit surface and the second incident surface are in contact, and the second exit surface and the third incident surface are in contact.

12. The optical lens according to claim 1, wherein The first refractive element includes a prism; and / or, The second refractive element includes a prism; and / or, The third refractive element includes a prism.

13. An optical lens, characterized in that, Comprising: A lens, a first refractive element, and a third refractive element arranged in sequence from the object side to the image side; The lens has a positive optical power; The first refractive element includes a free-form surface; the first refractive element is configured to reflect the light from the lens multiple times and transmit the reflected light to the third refractive element; The third refractive element includes a free-form surface; the third refractive element is configured to reflect the light from the first refractive element multiple times and transmit the reflected light; Wherein, the first refractive element and the third refractive element are in contact; the light emitted from the lens is transmitted after passing through the free-form surface of the first refractive element and the free-form surface of the third refractive element in sequence.

14. The optical lens according to claim 13, wherein The first refractive element includes a first incident surface, a first exit surface, and a first reflection surface; the first incident surface faces the lens, the first exit surface faces the third refractive element, and the first incident surface, the first exit surface, and the first reflection surface all intersect; at least one of the first incident surface, the first exit surface, and the first reflection surface is a free-form surface; The first incident surface is configured to transmit the light from the lens to the first reflection surface; The first reflecting surface is configured to reflect at least part of the light rays from the first incident surface back to the first incident surface; The first incident surface is further configured to reflect at least part of the light rays from the first reflecting surface to the first exit surface; The first exit surface is configured to transmit at least part of the light rays from the first incident surface to the third refractive element; The third refractive element includes a third incident surface, a third exit surface, and a third reflecting surface; the third incident surface faces the first refractive element; the third incident surface, the third exit surface, and the third reflecting surface all intersect; at least one of the third incident surface, the third exit surface, and the third reflecting surface is a free-form surface; The third incident surface is configured to transmit the light rays from the first refractive element to the third exit surface; The third exit surface is configured to reflect at least part of the light rays from the third incident surface to the third reflecting surface; The third reflecting surface is configured to reflect at least part of the light rays from the third exit surface back to the third exit surface; The third exit surface is further configured to transmit at least part of the light rays from the third reflecting surface; Wherein, the first exit surface and the third incident surface are in contact.

15. The optical lens according to claim 13 or 14, characterized in that, The refractive index n0 of the light rays in the lens, the refractive index n1 of the light rays in the first refractive element, and the refractive index n3 of the light rays in the third refractive element satisfy: n1 < n0 < n3.

16. An imaging module, characterized in that, Comprising a packaging structure, an optical sensor, and an optical lens according to any one of claims 1-15; the optical sensor is disposed on the image side of the optical lens; the optical lens is disposed within the packaging structure; The packaging structure includes a lens barrel and a guide rail; An accommodation cavity is provided inside the lens barrel; a limiting hole is formed in the side wall of the lens barrel, the limiting hole penetrates through the side wall of the lens barrel and communicates with the accommodation cavity; the accommodation cavity is used for placing the refractive elements of the optical lens, and the limiting hole is used for placing the lens of the optical lens; The guide rail is disposed inside the lens barrel; the guide rail is used to connect the refractive elements so that the refractive elements can move along the extending direction of the lens barrel.

17. The imaging module according to claim 16, wherein, The packaging structure further includes a light shield; the light shield is disposed outside the lens barrel.

18. The camera module according to claim 16 or 17, characterized in that, An exit hole is further provided on the side wall of the lens barrel; the packaging structure further includes a filter; the filter is disposed within the exit hole.

19. An electronic device, characterized in that, Comprising a camera module according to any one of claims 16-18 and a printed circuit board; the camera module and the printed circuit board are electrically connected.

20. An encapsulation structure, characterized in that, Comprising: A lens barrel, inside which an accommodation cavity is provided; a limiting hole is formed in the side wall of the lens barrel, the limiting hole penetrates through the side wall of the lens barrel and communicates with the accommodation cavity; the accommodation cavity is used for placing the refractive elements of the optical lens, and the limiting hole is used for placing the lens of the optical lens; A guide rail, disposed inside the lens barrel; the guide rail is used to connect the refractive elements so that the refractive elements can move along the extending direction of the lens barrel.

Images