Camera module and electronic equipment

Abstract

The invention provides a camera module and electronic equipment. The camera module is applied to the electronic equipment, and the camera module sequentially comprises, from an object side to an image side, a lens group used for receiving light from a shot object, the light from the shot object propagating along a first direction, the first direction being the thickness direction of the electronic equipment; the prism is used for receiving and reflecting the light rays from the lens group, and the light rays from the lens group are reflected twice in the prism and then are emitted out; and the image sensor is used for receiving the light from the prism so as to carry out imaging. According to the technical scheme, the long focus can be realized in the light and thin electronic equipment, the imaging quality and the assembly yield are improved, and the balance of the light and thin performance, the shooting performance and the quality cost of the electronic equipment is favorably realized.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and more particularly, to an imaging module and an electronic device. Background Art

[0002] With the continuous development of electronic device technology, the shooting function has become an important feature of electronic devices (such as mobile phones, tablets, etc.) and a main indicator for evaluating the performance of electronic devices. To meet the diverse needs of users, such as achieving a camera-like shooting experience or meeting the shooting requirements in different scenarios, long-focus lenses are often configured on electronic devices.

[0003] The long-focus lens has a relatively long focal length. Limited by the thickness of the electronic device, a periscope structure with a prism is usually used to turn the optical path to achieve long focus. However, the existing periscope imaging module has problems of complex structure and large volume. The complex structure makes the optical path complex, which in turn affects the imaging quality and assembly yield. The large volume increases the thickness and weight of the electronic device and reduces the priority of the thin and light design. Summary of the Invention

[0004] This application provides an imaging module and an electronic device, which can achieve long focus in a thin and light electronic device while improving the imaging quality and assembly yield, and is conducive to achieving the balance of thinness, shooting performance, and quality cost of the electronic device.

[0005] In a first aspect, an imaging module is provided, which is applied to an electronic device. The imaging module sequentially includes, from the object side to the image side: a lens group for receiving light from an object to be photographed, and the light from the object to be photographed propagates in a first direction, which is the thickness direction of the electronic device; a prism for receiving and reflecting the light from the lens group, and the light from the lens group is emitted after being turned twice in the prism; and an image sensor for receiving the light from the prism to perform imaging.

[0006] In the embodiments of this application, the imaging module uses a prism to fold the optical path, so as to achieve long focus in a small-size space. The imaging module uses one prism to fold the optical path, with a simple and compact overall structure, light weight, and small occupied space, and can be applied to a thinner and lighter electronic device. In addition, the volume of the imaging module is reduced and the optical path is simple, reducing the structural complexity and the module tolerance chain, and improving the assembly yield. In addition, during the process from the incidence to the projection of the imaging light beam onto the image sensor, the number of medium interfaces passed through is small. The imaging light beam is only turned twice in the prism and both are total reflections, reducing the energy loss. In this way, it can be ensured that the image sensor receives sufficient incident light, thereby improving the imaging quality. The imaging module can be arranged in the thickness direction of the electronic device and does not occupy the space of other components.

[0007] In summary, the camera module provided by the embodiments of the present application can achieve a long focal length in a thin and light electronic device while improving the imaging quality and assembly yield rate, which is beneficial to achieving the balance of the thinness and lightness, shooting performance, and quality cost of the electronic device.

[0008] In combination with the first aspect, in some implementation manners of the first aspect, the prism includes: an incident surface for receiving light from the lens group, and the light from the lens group propagates along the first direction; a first reflection surface for receiving the light from the incident surface and deflecting the propagation direction of the light from the incident surface from the first direction to a second direction, where the second direction is perpendicular to the first direction; a second reflection surface for receiving the light from the first reflection surface and deflecting the propagation direction of the light from the first reflection surface from the second direction to a third direction, where the third direction is perpendicular to the second direction; and an exit surface for receiving the light from the second reflection surface, and the light from the second reflection surface exits the exit surface along the third direction.

[0009] In combination with the first aspect, in some implementation manners of the first aspect, the third direction is the same as the first direction.

[0010] In combination with the first aspect, in some implementation manners of the first aspect, the incident surface is parallel to the exit surface, and the first reflection surface is parallel to the second reflection surface.

[0011] In combination with the first aspect, in some implementation manners of the first aspect, the incident surface, the first reflection surface, the exit surface, and the second reflection surface are sequentially connected end to end in order.

[0012] In combination with the first aspect, in some implementation manners of the first aspect, the prism is a parallelogram prism.

[0013] In combination with the first aspect, in some implementation manners of the first aspect, the lens group and the image sensor are respectively located on two sides of the prism on the axis parallel to the first direction.

[0014] There will be no lateral interference between the lens group and the image sensor in the direction perpendicular to the first direction, which can increase the degree of freedom in the design of the module and is beneficial to the design of structural components such as motors. In addition, when the camera module is installed on an electronic device, the size of the image sensor will not be limited by the thickness of the electronic device, and its specifications can be improved. In this way, a larger light range can be captured, better light and shadow details can be obtained, thereby improving the imaging quality, and it can also take into account the advantages of improving the specifications of the image sensor and the thinness and lightness of the electronic device.

[0015] In combination with the first aspect, in some implementation manners of the first aspect, the third direction is opposite to the first direction.

[0016] In combination with the first aspect, in some implementations of the first aspect, the incident surface is parallel to the exit surface, or the incident surface and the exit surface are in the same plane; the first reflecting surface is perpendicular to the second reflecting surface.

[0017] In combination with the first aspect, in some implementations of the first aspect, the incident surface and the exit surface are in the same plane, and the two ends of the incident surface in the second direction are respectively connected to the first reflecting surface and the second reflecting surface.

[0018] In combination with the first aspect, in some implementations of the first aspect, the prism is a trapezoidal prism.

[0019] In combination with the first aspect, in some implementations of the first aspect, the lens group and the image sensor are on the same side of the prism on the axis parallel to the first direction.

[0020] This can further reduce the size of the camera module in the first direction. Alternatively, the space and size saved by the image sensor can be used to improve the aperture, such as increasing the aperture size, which can increase the amount of incident light and improve the imaging quality. In addition, when the camera module is installed on an electronic device, the size of the image sensor is not limited by the thickness of the electronic device, and its specifications can be improved, thereby improving the imaging quality and also taking into account the advantages of improving the specifications of the image sensor and the thinness and lightness of the electronic device.

[0021] In combination with the first aspect, in some implementations of the first aspect, the third direction is perpendicular to the first direction.

[0022] In combination with the first aspect, in some implementations of the first aspect, the incident surface is perpendicular to the exit surface, and the first reflecting surface and the second reflecting surface are oppositely arranged.

[0023] In combination with the first aspect, in some implementations of the first aspect, the exit surface is respectively connected to the first reflecting surface and the second reflecting surface, and the incident surface is respectively connected to the first reflecting surface, the second reflecting surface and the exit surface.

[0024] In combination with the first aspect, in some implementations of the first aspect, the lens group is located on the side of the prism facing the object to be photographed, and the image sensor is located on the side surface of the prism.

[0025] This can further reduce the size of the camera module in the first direction. Alternatively, the space and size saved by the image sensor can be used to improve the aperture, such as increasing the aperture size, which helps to improve the imaging quality. In addition, there will be no lateral interference between the image sensor and the lens group in the direction perpendicular to the first direction, which is beneficial to solving the problem of interference in the motor design space of the lens group.

[0026] In combination with the first aspect, in some implementations of the first aspect, the angle between the first reflecting surface and the incident surface is 45°, and the angle between the second reflecting surface and the exit surface is 45°.

[0027] In combination with the first aspect, in some implementations of the first aspect, the prism is a hexahedron. Adopting a hexahedron structure is beneficial to processes such as the processing and coating of the prism.

[0028] In combination with the first aspect, in some implementations of the first aspect, the lens group includes a first lens group and a second lens group arranged in sequence from the object side to the image side. The combined focal length of the first lens group is greater than or equal to 8 mm and less than or equal to 10 mm, and the combined focal length of the second lens group is greater than or equal to -14 mm and less than or equal to -12 mm.

[0029] In combination with the first aspect, in some implementations of the first aspect, the effective focal length of the lens group is greater than or equal to 15 mm and less than or equal to 18 mm.

[0030] In combination with the first aspect, in some implementations of the first aspect, the aperture value of the camera module is greater than or equal to 1.8 and less than or equal to 4.

[0031] In combination with the first aspect, in some implementations of the first aspect, the equivalent focal length of the camera module is greater than or equal to 85 mm and less than or equal to 100 mm.

[0032] In combination with the first aspect, in some implementations of the first aspect, the field of view angle of the camera module is greater than or equal to 12° and less than or equal to 15°.

[0033] In a second aspect, there is provided an electronic device, including the camera module in the above first aspect and any implementation of the first aspect, wherein the incident direction of the incident light received by the lens group is consistent with the thickness direction of the electronic device.

[0034] In combination with the second aspect, in some implementations of the second aspect, the electronic device further includes a processor. The camera module is used to acquire image data; the processor is used to obtain the image data from the camera module and process the image data. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of an electronic device applicable to an embodiment of the present application.

[0036] Figure 2 It is a schematic structural diagram of a camera module provided by an embodiment of the present application.

[0037] Figure 3 It is a schematic structural diagram of a camera module provided by an embodiment of the present application.

[0038] Figure 4 is Figure 3 A schematic diagram of the light propagation paths under different fields of view of the camera module in

[0039] Figure 5 is a schematic structural diagram of a camera module provided by an embodiment of the present application.

[0040] Figure 6 is a schematic structural diagram of a camera module provided by an embodiment of the present application.

[0041] Figure 7 is Figure 6 A schematic diagram of the light propagation paths under different fields of view of the camera module in

[0042] Figure 8 is a schematic structural diagram of a lens group in the camera module provided by an embodiment of the present application. Detailed implementation manners

[0043] Next, the technical solutions in the present application will be described in conjunction with the accompanying drawings.

[0044] It should be noted that in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may represent A or B; herein, "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0045] In the embodiments of the present application, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. Additionally, in the description of the embodiments of the present application, "a plurality" means two or more than two, "at least one" and "one or more" mean one, two, or more than two. The singular forms "a", "one kind", "the", "above-mentioned", "this", and "this one" are also intended to include, for example, the expression form of "one or more", unless there is a clear contrary indication in the context.

[0046] References to "one embodiment" or "some embodiments" or the like described in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc., which appear in different places in this specification, do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants mean "including but not limited to", unless otherwise specifically emphasized.

[0047] In the description of the embodiments of the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. is defined with respect to the orientation or position in which the components in the drawings are schematically placed. It should be understood that these directional terms are relative concepts, which are used for relative description and clarification, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. It can change accordingly with the change of the orientation in which the components in the drawings are placed, and therefore cannot be understood as a limitation to the present application. In addition, the "vertical" involved in the present application is not strictly vertical, but within the allowable error range. The "parallel" is not strictly parallel, but within the allowable error range.

[0048] In the embodiments of the present application, the same reference numeral is used to represent the same component or the same part. For the same parts in the embodiments of the present application, only one of the parts or components may be marked with the reference numeral in the drawings. It should be understood that the reference numeral also applies to other identical parts or components. In addition, the components in the drawings are not drawn to actual scale, and the sizes and dimensions of the components shown in the drawings are only exemplary and should not be understood as a limitation to the present application.

[0049] For ease of understanding, the technical terms involved in the present application will be explained and described below.

[0050] The optical axis is an imaginary line in an optical system and can be understood as the direction in which the optical system conducts light. For a symmetric transmission system, the optical axis generally coincides with the rotation center line of the optical system. If the light ray coincides with the optical axis, the light will be transmitted along the optical axis in the optical system.

[0051] The object space is the space where the object to be photographed is located, bounded by the lens.

[0052] The image space is the space where the image formed behind the lens by the light emitted by the object to be photographed passing through the lens is located, bounded by the lens.

[0053] Taking the lens as the boundary, the side where the object to be photographed is located is the object side, and the surface of the lens close to the object side can be called the object side surface; taking the lens as the boundary, the side where the image of the object to be photographed is located is the image side, and the surface of the lens close to the image side can be called the image side surface.

[0054] Focal length refers to the perpendicular distance from the optical center of a lens or lens group to the focus (or focal plane) when a scene at infinity forms a clear image through the lens or lens group on the focal plane.

[0055] A telephoto lens is a photographic lens with a focal length longer than that of a standard lens. Generally, the angle of view of a standard lens is about 30 degrees, and the focal length is close to the length of the diagonal of the camera frame; the angle of view of a telephoto lens is within 20 degrees, and the focal length can reach dozens of millimeters (e.g., 70mm) or hundreds of millimeters (e.g., 500mm).

[0056] The effective focal length refers to the actual focal length of the lens, specifically the distance from the front end of the lens to the imaging plane.

[0057] The equivalent focal length refers to the angle of view obtained when using the same lens on different cameras or sensors. The equivalent focal length is equal to the actual focal length of the lens multiplied by the crop factor of the camera or sensor.

[0058] The field of view refers to the area included in the visible image formed by the object to be photographed through the lens on the focal plane, that is, the part of the object that fills the camera acquisition chip.

[0059] The field of view angle (FOV) is the angle formed by taking the lens as the vertex and the two edges of the maximum imaging range of the measured object passing through the lens. The size of the field of view angle determines the field of view of the lens. Generally, the longer the focal length, the narrower the field of view angle; the shorter the focal length, the wider the field of view angle.

[0060] The central field of view refers to the center of the image plane. The peripheral field of view refers to the edge of the image plane.

[0061] The optical power is equal to the difference between the convergence of the image-side light beam and the convergence of the object-side light beam, and it characterizes the ability of the optical system to deflect light rays.

[0062] The aperture is a device used to control the amount of light passing through the lens and entering the photosensitive surface inside the camera body. The size of the aperture controls the amount of light entering and also controls the degree of background blurring (i.e., controls the depth of field of the picture). The larger the aperture, the more light enters, and the brighter the picture. The smaller the aperture, the less light enters, and the darker the picture. The larger the aperture, the shallower the depth of field, and the more obvious the background blurring (i.e., the more blurred the background). The smaller the aperture, the deeper the depth of field, and the clearer the background.

[0063] The aperture F value is the relative value obtained by dividing the focal length of the lens by the clear aperture diameter of the lens. The smaller the aperture F value, the more light enters in the same unit time.

[0064] The Abbe number, that is, the dispersion coefficient, is the ratio of the difference in refractive indices of an optical material at different wavelengths, representing the degree of material dispersion.

[0065] Figure 1 A schematic structural diagram of an electronic device to which the embodiments of the present application are applicable is shown.

[0066] In the embodiments of the present application, the electronic device 100 is an electronic device with an imaging function (such as shooting or taking pictures), such as a mobile phone, a personal digital assistant (PDA) computer, a tablet computer, a laptop computer, a laptop computer, a video camera, a video recorder, a camera, a smart watch, a smart wristband, an in-vehicle computer, a television (or smart screen), a wearable device, etc.

[0067] The embodiments of the present application do not impose special restrictions on the specific form of the electronic device 100. For the convenience of description and understanding below, the electronic device 100 is taken as an example of a mobile phone. Exemplarily, Figure 1 Figures (a) and (b) respectively schematically show the front and back of the electronic device 100.

[0068] As Figure 1 shown, the electronic device 100 may include a housing 101, a display panel (DP) 102, and a camera compact module (CCM) 103.

[0069] The housing 101 forms a receiving space for housing the components of the electronic device 100. The housing 101 can also play a role in protecting the electronic device 100 and supporting the whole machine. The display screen 102 and the camera module 103 are disposed in the receiving space of the housing 101 and are connected to the housing 101. The material of the housing 101 can be metal, plastic, ceramic, or glass.

[0070] In some embodiments, the housing 101 may include a rear cover disposed opposite to the display screen 102 and a middle frame disposed inside the electronic device 100, and the display screen 102 and the camera module 103 may be fixed to the middle frame.

[0071] The display screen 102 is used to display images, such as the images captured by the camera module 103. The display screen 102 can be a liquid crystal display (LCD) screen, an organic light emitting diode (OLED) display screen, etc., where the OLED display screen can be a flexible display screen or a rigid display screen. The display screen 102 can be a regular screen, or an irregular screen, a foldable screen, etc. The display screen 102 can be disposed on the front and / or the back of the electronic device 100. Here, the front of the electronic device 100 can be understood as the side facing the user when the user uses the electronic device 100, and the back of the electronic device 100 can be understood as the side facing away from the user when the user uses the electronic device 100.

[0072] The camera module 103 is used to capture still images or videos. The camera module 103 can be disposed on the front and / or the back of the electronic device 100. When the camera module 103 is disposed on the front of the electronic device 100, it can be used to capture the scene on the front side of the electronic device 100, such as for selfies, and can be referred to as a front camera in some embodiments. When the camera module 103 is disposed on the back of the electronic device 100, it can be used to capture the scene on the back side of the electronic device 100, and can be referred to as a rear camera in some embodiments. When shooting, the user can select the corresponding camera module according to the shooting requirements. It can be understood that Figure 1 the installation position of the camera module 103 in the figure is only illustrative.

[0073] In some embodiments, when the camera module 103 is used as a front camera, it can be installed at any position on the front of the electronic device 100 except the display screen 102, such as the left side of the earpiece, the middle of the upper part of the electronic device 100, the lower part (or chin) of the electronic device 100, or the four corners of the electronic device 100, etc. The camera module 103 can also be disposed in the cut-out area on the display screen 102. When the camera module 103 is used as a rear camera, it can be installed at any position on the back of the electronic device 100, such as the upper left corner, the upper right corner, or the middle of the upper part.

[0074] In some other embodiments, the camera module 103 may not be disposed on the main body of the electronic device 100, but on an edge protruding from the main body of the electronic device 100, or on a component that is movable or rotatable relative to the electronic device 100, where the component can be telescoped or rotated from the main body of the electronic device 100 so that the camera module 103 can be hidden inside the electronic device 100 or at least partially popped out of the electronic device 100, etc. When the camera module 103 is rotatable relative to the electronic device 100, the camera module 103 is equivalent to a front camera and a rear camera, that is, by rotating the same camera module 103, the scene on the front side of the electronic device 100 and the scene on the back side of the electronic device 100 can be captured.

[0075] In some other embodiments, when the display screen 102 is foldable, the camera module 103 can serve as a front camera or a rear camera along with the folding of the display screen 102.

[0076] The embodiments of the present application do not limit the number of camera modules 103 provided, which can be one, two, four or even more. For example, one or more camera modules 103 can be provided on the front of the electronic device 100, and / or one or more camera modules 103 can be provided on the back of the electronic device 100. When multiple camera modules 103 are provided, the multiple camera modules 103 can be completely the same or different. For example, the lens optical parameters of the multiple camera modules 103 are different, the installation positions of the lenses are different, the shapes of the lenses are different, etc. The embodiments of the present application do not make any limitation on the relative positions of the multiple camera modules when they are provided.

[0077] In some embodiments, the electronic device 100 may further include a protective lens 104 for protecting the camera module 103. The protective lens 104 is disposed on the housing 101 and covers the camera module 103.

[0078] In some embodiments, when the protective lens 104 is used to protect the front camera, the protective lens 104 can only cover the front camera module or cover the entire front of the electronic device 100. When the protective lens 104 covers the entire front of the electronic device 100, it can be used to protect the front camera module and the display screen 102 at the same time, and the protective lens 104 is the cover glass (CG).

[0079] In some embodiments, when the protective lens 104 is used to protect the rear camera, the protective lens 104 can cover the entire back of the electronic device 100, or can only be disposed at the position corresponding to the rear camera module.

[0080] The material of the protective lens 104 can be glass, sapphire, ceramic, etc., which is not particularly limited in the present embodiment. In some embodiments, the protective lens 104 is transparent, and light outside the electronic device 100 can enter the camera module 103 through the protective lens 104.

[0081] It should be understood that Figure 1 The structure illustrated in the figure does not constitute a specific limitation on the electronic device 100. The electronic device 100 may include more or fewer components than those shown in the figure. For example, the electronic device 100 may also include one or more components such as a battery, a flash, a fingerprint recognition module, an earpiece, buttons, and a sensor. The electronic device 100 may also be provided with a component arrangement different from that shown in the figure.

[0082] With the continuous development of electronic device technology, the shooting function has become an important feature of electronic devices (such as mobile phones, tablets, etc.) and a major indicator for evaluating the performance of electronic devices. In order to meet the diverse needs of users, such as achieving a camera-like shooting experience or meeting shooting needs in different scenarios, electronic devices are often equipped with telephoto lenses.

[0083] Telephoto lenses have a relatively long focal length. Due to the thickness of electronic devices, telephoto is usually achieved by adding a periscope structure with a prism to bend the optical path. However, existing periscope camera modules have problems with complex structure and large size. The complex structure makes the optical path complex, which in turn affects the image quality and assembly yield. The large size increases the thickness and weight of the electronic device, reducing the priority of lightweight design.

[0084] In view of this, an embodiment of the present application provides a periscope camera module, which is applied to electronic devices and can achieve telephoto while taking into account assembly yield and improving imaging quality.

[0085] Figure 2 A schematic structural diagram of a camera module provided in an embodiment of the present application is shown. Figure 2 The camera module 200 shown can be applied to Figure 1 In the electronic device 100 shown, for example, Figure 1 An example of the camera module 103 shown. In the embodiment of the present application, the camera module 200 is a periscope camera module.

[0086] like Figure 2 As shown, the camera module 200 includes a lens group 20, a prism 30 and an image sensor 40 which are sequentially arranged along the optical path.

[0087] Here, the optical path is the propagation path of light, which is schematically represented by the transmission direction of the imaging light beam 201 in the figure. The imaging light beam 201 is a light beam formed by the light rays incident on the periscope camera module 200. In the embodiments of the present application, taking the lens group 20 as the boundary, the side where the object to be photographed is located is the object side, and the side where the image of the object to be photographed is located is the image side. Therefore, the lens group 20, the prism 30, and the image sensor 40 are sequentially arranged from the object side to the image side.

[0088] Since the camera module 200 is a periscope camera module, the camera module 200 has a folded optical axis. For convenience of description, the axis where the optical axis part corresponding to the lens group 20 is located is defined as the Z-axis hereinafter. For example, Figure 2 the vertical direction of the paper surface shown; the axis where the transmission direction of the light ray after being incident on the prism 30 and being refracted by the prism 30 for the first time is located is defined as the X-axis. For example, Figure 2 the horizontal direction of the paper surface shown, and the X-axis is perpendicular to the Z-axis; the axis perpendicular to the Z-axis and perpendicular to the X-axis is defined as the Y-axis. For example, Figure 2 the direction perpendicular to the paper surface shown.

[0089] More specifically, the direction towards the lens group 20 of the Z-axis is defined as the positive direction of the Z-axis, and the opposite direction is the negative direction of the Z-axis. The direction towards the transmission direction of the light ray after being refracted by the prism 30 for the first time of the X-axis is defined as the positive direction of the X-axis, and the opposite direction is the negative direction of the X-axis. Looking from the positive direction of the Z-axis, the positive direction of the Y-axis is the direction of clockwise rotation of the positive direction of the X-axis, and the negative direction of the Y-axis is the direction of counterclockwise rotation of the positive direction of the X-axis.

[0090] Similarly, the definitions of the X, Y, and Z axes and each direction are also applicable to each of the following figures to be described. It should be noted that the above definitions of the X, Y, and Z axes and each direction are only for the convenience of describing the positional relationship and connection relationship between the various components in the embodiments of the present application, and should not be construed as a limitation on the embodiments of the present application.

[0091] The lens group 20 is used to receive the light rays from the object to be photographed. Taking the imaging light beam 201 as an example, specifically, the lens group 20 is used to transmit the received imaging light beam 201 to the prism 30. In some embodiments, the lens group 20 can also perform certain processing on the received imaging light beam 201, such as aberration correction, chromatic aberration elimination, etc. The lens group 20 can include one or more lenses (or called lens elements). When the lens group 20 includes multiple lenses, the materials of the multiple lenses can be different or the same. In the embodiments of the present application, the number of lenses included in the lens group 20 and the lens materials are not specifically limited. Those skilled in the art can set the number of lenses and lens materials according to actual needs, or set a combination of a solid lens (whose lens parameters are fixed) and / or a liquid lens (whose lens parameters can be dynamically adjusted), etc., and no more description will be made here.

[0092] The lens group 20 may further include a lens barrel for accommodating the one or more lenses. In some embodiments, the imaging module 200 has a zoom function. To achieve zooming, the lens barrel may be an integral body, and multiple lenses are accommodated in the integral lens barrel, and the relative positions between the lenses can be adjusted by other structures. Alternatively, the lens barrel may include multiple lens barrel parts, the multiple lenses are grouped and arranged in the multiple lens barrel parts, and the relative positions between the multiple lens barrel parts can be adjusted, so as to adjust the relative positions between the lenses.

[0093] In the embodiments of the present application, the light from the object to be photographed (taking the imaging light beam 201 as an example) is incident on the lens group 20 along a first direction (for example Figure 2 the negative Z-axis direction shown). Here, the first direction may be the thickness direction of the electronic device 100 when the imaging module 200 is applied to the electronic device 100.

[0094] The prism 30 is used to receive and reflect the light from the lens group 20. Specifically, the prism 30 receives the imaging light beam 201 from the lens group 20, folds the optical path of the received imaging light beam 201, and then transmits it to the image sensor 40. The folding of the optical path is also called the turning of the optical path, which means changing the transmission path of the light. In the embodiments of the present application, the light from the lens group 20 is emitted after passing through two turns in the prism 30.

[0095] In some embodiments, the light from the lens group 20 is emitted after passing through two 90° turns in the prism 30. This facilitates the layout of the various components of the imaging module 200 along the thickness direction of the electronic device 100 and / or perpendicular to the thickness direction of the electronic device 100.

[0096] In some embodiments, the prism 30 may include an incident surface 31, a first reflection surface 32, a second reflection surface 33, and an exit surface 34.

[0097] The incident surface 31 is used to receive the light from the lens group 20. Correspondingly, taking the imaging light beam 201 as an example, after the imaging light beam 201 exits from the lens group 20, it is incident on the incident surface 31 of the prism 30 along a first direction (for example Figure 2 the negative Z-axis direction shown). The incident surface 31 is perpendicular to the first direction.

[0098] The first reflection surface 32 is used to receive the light from the incident surface 31 and deflect the propagation direction of the light from the incident surface 31 from the first direction to a second direction, and the second direction is perpendicular to the first direction. Specifically, the first reflection surface 32 can deflect and reflect the imaging light beam 201 from the incident surface 31 by 90° to the second reflection surface 33. Correspondingly, after the imaging light beam 201 is incident on the first reflection surface 32 along the first direction, it is reflected by the first reflection surface 32 and then propagates along the second direction (for exampleFigure 2 is incident on the second reflecting surface 33 in the positive X-axis direction shown.

[0099] The second reflecting surface 33 is configured to receive the light beam from the first reflecting surface 32, and deflect the propagation direction of the light beam from the first reflecting surface 32 from a second direction to a third direction, where the third direction is perpendicular to the second direction. Specifically, the second reflecting surface 33 can deflect the imaging light beam from the first reflecting surface 32 by 90° again and reflect it to the exit surface 34. Correspondingly, after the imaging light beam 201 is incident on the second reflecting surface 33 in the second direction, it is reflected by the second reflecting surface 33 and then incident on the exit surface 34 in a direction perpendicular to the second direction (i.e., the third direction).

[0100] In the embodiments of the present application, the first reflecting surface 32 and the second reflecting surface are 45° reflecting surfaces.

[0101] The exit surface 34 is configured to receive the light beam from the second reflecting surface 33, and the light beam from the second reflecting surface 33 exits the exit surface in the third direction. Specifically, the exit surface 34 can receive the imaging light beam 201 from the second reflecting surface 33 and project it onto the image sensor 40. The exit surface 34 is perpendicular to the direction perpendicular to the second direction, that is, the exit surface 34 is parallel to the second direction, or the exit surface 34 is perpendicular to the third direction.

[0102] The image sensor 40 is configured to receive the light beam from the prism 30 for imaging. Specifically, the image sensor 40 has an image acquisition area (also referred to as a photosensitive area or a photosensitive surface or a target surface), and the image sensor 40 acquires the received imaging light beam 201 through the image acquisition area. The image sensor 40 is a device with a photoelectric conversion function, and can convert the optical signal of the imaging light beam 201 acquired on the image acquisition area into an electrical signal in a corresponding proportional relationship with the optical signal. In some embodiments, the image sensor 40 can be a CCD image sensor composed of a charged coupled device (CCD) or a CMOS image sensor composed of a complementary metal oxide semiconductor (CMOS).

[0103] In some embodiments, the camera module 200 may further include a housing for accommodating the entire camera module, a connector, a filter, a circuit board, a driving motor, and peripheral electronic components, etc., which will not be elaborated one by one here. It can be understood that in order to more clearly show the optical path, Figure 2 other structures of the shown camera module 200 are omitted.

[0104] In the embodiments of the present application, the 45° reflecting surface can be understood as a reflecting surface that forms a 45° angle with the incident light. It should be noted that the "45° angle" involved here is not an angle in the strict sense, but within the allowable error range. For example, when the included angle between the incident light and the reflecting surface is within the range of 45° ± 0.05°, the reflecting surface can be considered as a 45° reflecting surface.

[0105] In the embodiments of the present application, the 90° deflection can be understood as the included angle between the reflected light and the incident light being 90°. It should be noted that the "90° included angle" involved here is not an angle in the strict sense, but within the allowable error range. For example, when the included angle between the reflected light and the incident light is within the range of 90° ± 0.05°, it can be considered that the light beam undergoes a 90° deflection.

[0106] The perpendicularity involved in the embodiments of the present application is not perpendicularity in the strict sense, but within the allowable error range. For example, when the included angle between the two is within the range of 90° ± 0.05°, the two can be considered perpendicular. The parallelism involved in the embodiments of the present application is not parallelism in the strict sense, but within the allowable error range. For example, when the included angle between the two is within the range of 0° ± 0.05°, the two can be considered parallel.

[0107] Refer to Figure 2 As shown, the imaging principle of the imaging module 200 is as follows: The light entering the imaging module 200 from the object side first passes through the lens group 20 and then is incident on the prism 30, and after being deflected by the prism 30, it is projected onto the image sensor 40 to achieve imaging of the object.

[0108] In the embodiments of the present application, the imaging module 200 uses the prism 30 to fold the optical path, so as to achieve a long focal length in a small-size space. The imaging module 200 uses one prism to fold the optical path, with a simple, compact overall structure, light weight, and small occupied space, and can be applied to thinner and lighter electronic devices. In addition, the imaging module has a reduced volume and a simple optical path, which reduces the structural complexity and the module tolerance chain and can improve the assembly yield. Moreover, during the process from the incidence of the imaging light beam to its projection onto the image sensor 40, the number of medium interfaces (such as the interface between air and the prism 30, the interface between air and the lens group 20, etc.) passed through is small, reducing the energy loss caused by refraction. The imaging light beam is only deflected twice in the prism 30 and both are total reflections, reducing the energy loss caused by reflection. In this way, it can be ensured that the image sensor 40 receives sufficient incident light, thereby improving the imaging quality. The imaging module 200 can be arranged in the thickness direction of the electronic device and does not occupy the space of other components.

[0109] In summary, the imaging module 200 provided by the embodiments of the present application can achieve a long focal length in a thin and light electronic device while improving the imaging quality and the assembly yield, which is conducive to achieving the balance of the thinness, shooting performance, and quality cost of the electronic device.

[0110] In the embodiment of the present application, the included angle between the first reflecting surface 32 and the incident surface 31 is 45°; the included angle between the second reflecting surface 33 and the exit surface 34 is 45°.

[0111] In the embodiment of the present application, there are various setting manners for the relative position relationship among the incident surface 31, the first reflecting surface 32, the second reflecting surface 33, and the exit surface 34.

[0112] As an example, referring to Figure 3 as shown, the first reflecting surface 32 is parallel to the second reflecting surface 33, and the incident surface 31 is parallel to the exit surface 34. Correspondingly, the third direction is the same as the first direction, or in other words, the third direction and the first direction are the same direction.

[0113] In this way, the lens group 20, the prism 30, and the image sensor 40 are arranged in sequence along the initial direction when the imaging light beam 201 is incident on the imaging module 200, where the initial direction of the imaging light beam 201 is the aforementioned first direction, for example Figure 3 as shown in the negative Z-axis direction. Specifically, the lens group 20 and the image sensor 40 are respectively located on both sides of the prism 30 on the axis parallel to the first direction. It can be understood that Figure 3 the propagation path of the imaging light beam is described by taking the chief ray of the central field of view as an example. Exemplarily, Figure 4 shows Figure 3 the schematic diagram of the light propagation paths of the imaging module at different fields of view as shown.

[0114] The optical path of the imaging light beam 201 in the imaging module 200 is as follows: The imaging light beam 201 is incident on the lens group 20 along the first direction (for example Figure 3 the negative Z-axis direction as shown) and exits from the lens group 20 along the first direction; the imaging light beam 201 exiting from the lens group 20 is incident on the incident surface 31 along the first direction and enters the prism 30 to propagate inside through the incident surface 31; the imaging light beam 201 passing through the incident surface 31 is incident on the first reflecting surface 32 along the first direction, and after being reflected by the first reflecting surface 32, it is refracted to propagate along the second direction (for example Figure 3 the positive X-axis direction as shown); the imaging light beam 201 reflected by the first reflecting surface 32 is incident on the second reflecting surface 33 along the second direction, and after being reflected by the second reflecting surface 33, it is refracted to continue to propagate along the first direction (for example Figure 3 the negative Z-axis direction as shown); the imaging light beam 20 reflected by the second reflecting surface 33 is incident on the exit surface 34 along the first direction and is projected onto the image sensor 40 through the exit surface 34.

[0115] In this way, the first reflecting surface 32 and the second reflecting surface 33 are arranged such that the imaging light beam 201 is reflected twice inside the prism 30, which can fold the optical path and shorten the size of the imaging module 200 in the first direction. Moreover, since the lens group 20 and the image sensor 40 are respectively located on both sides of the prism 30 in the first direction, there will be no lateral interference between them in the direction perpendicular to the first direction, increasing the degree of freedom in the design of the magnification module and facilitating the design of structural components such as motors (such as autofocus motors or optical image stabilization motors).

[0116] In addition, when the imaging module 200 is installed on an electronic device, the main plane of the image sensor 40 is parallel to the plane where the display screen of the electronic device is located (or the main plane of the electronic device), that is, perpendicular to the thickness direction of the electronic device. In this way, the size of the image sensor 40 is not limited by the thickness of the electronic device, and its specifications can be improved, such as having a larger size. Thus, a larger light range can be captured, better light and shadow details can be obtained, thereby improving the imaging quality, and the advantages of both improving the specifications of the image sensor and making the electronic device thinner and lighter can be achieved at the same time.

[0117] It should be noted that the main plane involved here can be understood as the surface with the largest area on the corresponding component.

[0118] In some embodiments, the incident surface 31 and the exit surface 34 are arranged opposite to each other, the first reflecting surface 32 and the second reflecting surface 33 are arranged opposite to each other, the incident surface 31 is respectively connected (or intersects) with the first reflecting surface 32 and the second reflecting surface 33, and the exit surface 34 is respectively connected with the first reflecting surface 32 and the second reflecting surface 33. Or rather, the incident surface 31, the first reflecting surface 32, the exit surface 34, and the second reflecting surface 33 are sequentially connected end to end in order.

[0119] In some embodiments, the prism 30 is a prism with a parallelogram main cross-section, or is called a parallelogram prism. The main cross-section involved here can be understood as the plane where the corresponding optical axis part of the prism 30 is located (for example Figure 3 the XZ plane shown).

[0120] As another example, referring to Figure 5 shown, the first reflecting surface 32 is perpendicular to the second reflecting surface 33, and the incident surface 31 is parallel to the exit surface 34. Correspondingly, the third direction is opposite to the first direction, or rather, the third direction is the reverse direction of the first direction.

[0121] In this way, the lens group 20 and the image sensor 40 are located on the same side of the prism 30 on the axis parallel to the first direction.

[0122] Figure 5 The optical path shown is the same as that in Figure 3Unlike the optical path shown, the transmission path of the imaging light beam 201 after being reflected by the second reflecting surface 33 is different. Specifically, the imaging light beam 201 reflected by the first reflecting surface 32 is incident on the second reflecting surface 33 along the second direction (e.g., Figure 5 the positive X-axis direction shown), and after being reflected by the second reflecting surface 33, it is refracted to be transmitted along the opposite direction of the first direction (e.g., Figure 5 the positive Z-axis direction shown); the imaging light beam 201 reflected by the second reflecting surface 33 is incident on the exit surface 34 along the opposite direction of the first direction, and passes through the exit surface 34 and is projected onto the image sensor 40.

[0123] In this way, the arrangement of the first reflecting surface 32 and the second reflecting surface 33 enables the lens group 20 and the image sensor 40 to be on the same side of the prism 30, which is equivalent to saving the space and size occupied by the image sensor 40 in the first direction. Therefore, the size of the imaging module 200 in the first direction can be further reduced. Alternatively, the space and size saved by the image sensor 40 can be used to improve the aperture, for example, increasing the aperture size, which can increase the amount of incident light and improve the imaging quality.

[0124] In addition, when the imaging module 200 is installed on an electronic device, the main plane of the image sensor 40 is parallel to the plane where the display screen of the electronic device is located. In this way, the size of the image sensor 40 is not limited by the thickness of the electronic device, and its specifications can be improved, for example, having a larger size, so as to improve the imaging quality and also take into account the advantages of improving the specifications of the image sensor and the thinness and lightness of the electronic device.

[0125] In some embodiments, the first reflecting surface 32 and the second reflecting surface 33 are oppositely arranged, the incident surface 31 and the exit surface 34 are in the same plane (i.e., the incident surface 31 and the exit surface 34 are the same surface of the prism 30), and both ends of the incident surface 31 (i.e., the exit surface 34) on the axis of the second direction are connected to the first reflecting surface 32 and the second reflecting surface 33 respectively.

[0126] In some embodiments, the prism 30 is a prism with a trapezoidal main cross-section, or is called a trapezoidal prism.

[0127] As another example, referring to Figure 6 shown, the first reflecting surface 32 and the second reflecting surface 33 are oppositely arranged, and the incident surface 31 and the exit surface 34 are perpendicular to each other. Correspondingly, the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0128] In this way, the lens group 20 can be located on the side of the prism 30 facing the object to be photographed (such as the top of the prism 30), and the image sensor 40 can be located on the side of the prism 30 in the direction perpendicular to the first direction (such as the side of the prism 30). It can be understood that, Figure 6Taking the chief ray of the central field of view as an example, the propagation path of the imaging beam is described. Exemplarily, Figure 7 shows Figure 6 a schematic structural diagram of the camera module shown at different angles and a schematic diagram of the light propagation path under different fields of view.

[0129] Figure 6 The difference between the shown optical path and Figure 3 the shown optical path is that the transmission path of the imaging beam 201 after being reflected by the second reflecting surface 33 is different. Specifically, the imaging beam 201 reflected by the first reflecting surface 32 is incident on the second reflecting surface 33 along the second direction (for example, Figure 6 the positive X-axis direction shown), and after being reflected by the second reflecting surface 33, it is refracted to be transmitted along the third direction (for example, Figure 6 the negative Y-axis direction or the positive Y-axis direction shown); the imaging beam 201 reflected by the second reflecting surface 33 is incident on the exit surface 34 along the third direction and passes through the exit surface 34 and is projected onto the image sensor 40.

[0130] In this way, the arrangement of the first reflecting surface 32 and the second reflecting surface 33 enables the image sensor 40 to be arranged on the side surface of the prism 30, which is equivalent to saving the space and size occupied by the image sensor 40 in the first direction. Therefore, the size of the camera module 200 in the first direction can be further reduced. Or, the space and size saved by the image sensor 40 can be used to improve the aperture, for example, increasing the aperture size, which helps to improve the imaging quality.

[0131] In addition, there will be no lateral interference between the image sensor 40 and the lens group 20 in the direction perpendicular to the first direction, which is beneficial to solving the problem of interference in the motor design space of the lens group 20.

[0132] In some embodiments, the first reflecting surface 32 and the second reflecting surface 33 are oppositely arranged, the entrance surface 31 and the exit surface 34 are connected and perpendicular to each other, the exit surface 34 is respectively connected to the first reflecting surface 32 and the second reflecting surface 33, and the entrance surface 31 is respectively connected to the first reflecting surface 32, the second reflecting surface 33 and the exit surface 34.

[0133] In some embodiments, the prism 30 is a special-shaped prism.

[0134] In some embodiments, the prism 30 is a hexahedron.

[0135] In some embodiments, an anti-reflective coating (AR) layer, such as calcium fluoride, magnesium fluoride, diamond, titanium oxide, etc., is plated on the entrance surface 31 and the exit surface 34 to increase the intensity of transmitted light by reducing the intensity of reflected light and improve the imaging quality of the camera module 200.

[0136] In some embodiments, an anti-reflection film layer, such as a metal film layer, is coated on the first reflecting surface 32 and the second reflecting surface 33 to increase the reflected light energy and improve the imaging quality of the imaging module 200.

[0137] Figure 8 Fig. shows a schematic structural diagram of the lens group 20 involved in the foregoing embodiments.

[0138] Referring Figure 8 As shown, the lens group 20 may include a first lens group 21 and a second lens group 22 arranged in sequence from the object side to the image side. The first lens group 21 has a positive combined focal length (i.e., positive optical power), and the second lens group 22 has a negative combined focal length (i.e., negative optical power).

[0139] In some embodiments, the combined focal length of the first lens group 21 is greater than or equal to 8 mm and less than or equal to 10 mm. Exemplarily, the combined focal length of the first lens group 21 may be 9 mm, 9.3 mm, 9.5 mm, 9.8 mm, etc.

[0140] In some embodiments, the combined focal length of the second lens group 22 is greater than or equal to -14 mm and less than or equal to -12 mm. Exemplarily, the combined focal length of the second lens group 22 may be -12.6 mm, -13 mm, -13.8 mm, etc.

[0141] In some embodiments, the effective focal length of the lens group 20 (i.e., the effective focal length of the imaging module 200) is greater than or equal to 15 mm and less than or equal to 18 mm. Exemplarily, the effective focal length of the lens group 20 may be 16 mm, 16.5 mm, 17 mm, 17.5 mm, etc.

[0142] In some embodiments, the equivalent focal length of the lens group 20 (i.e., the equivalent focal length of the imaging module 200) is greater than or equal to 80 mm and less than or equal to 100 mm. Exemplarily, the equivalent focal length of the lens group 20 may be 85 mm, 90 mm, 95 mm, etc. Thus, the imaging module 200 can achieve a medium and long focal length shooting effect. For example, when shooting a person, it can compress the space and blur the background to highlight the main subject of the person.

[0143] In some embodiments, the first lens group 21 includes one lens, and the second lens group 22 includes P lenses, where P is greater than or equal to 1 and less than or equal to 3.

[0144] In some embodiments, the imaging module 200 has an optical zoom of 3 times (i.e., 3X) or 3.5 times (i.e., 3.5X).

[0145] In some embodiments, the aperture F value of the camera module 200 is greater than or equal to 1.8 and less than or equal to 4. Exemplarily, the aperture F value of the camera module 200 can be 2.0, 2.5, 3, 3.5, etc. In the embodiments of the present application, the camera module 200 can achieve a long focal length in a small-size space while having a large aperture, so as to reduce the light requirement, increase the exposure speed, and improve the picture quality, etc.

[0146] In some embodiments, the field of view angle of the camera module 200 is greater than or equal to 12° and less than or equal to 15°. Exemplarily, the field of view angle of the camera module 200 can be 13°, 13.5°, 14°, 14.5°, etc.

[0147] In some embodiments, the diagonal size of the image sensor 40 in the camera module 200 is greater than or equal to 7 mm and less than or equal to 11 mm. Exemplarily, the diagonal size of the image sensor 40 can be 7.2 mm, 10.24 mm, etc. In the embodiments of the present application, the camera module 200 can achieve a long focal length in a small-size space while having a large target surface size, so as to have higher optical resolution ability and generate higher-resolution images.

[0148] In some embodiments, the first lens group 21 includes a first lens 211, and the refractive index of the first lens 211 is greater than or equal to 1.6 and less than or equal to 2.0. Exemplarily, the refractive index of the first lens 211 is greater than or equal to 1.5 and less than or equal to 1.7.

[0149] In some embodiments, the Abbe number of the first lens 211 is greater than or equal to 20 and less than or equal to 80. Exemplarily, the Abbe number of the first lens 211 is greater than or equal to 18 and less than or equal to 56.

[0150] In some embodiments, the first lens 211 is made of glass or plastic.

[0151] In some embodiments, the object side surface S1 and / or the image side surface S2 of the first lens 211 is a spherical surface; or the object side surface S1 and / or the image side surface S2 of the first lens 211 is an aspherical surface.

[0152] In some embodiments, the second lens group 22 includes a second lens 221 and a third lens 222, and the refractive index of the second lens 221 and / or the third lens 222 is greater than or equal to 1.5 and less than or equal to 1.7.

[0153] In some embodiments, the Abbe number of the second lens 221 and / or the third lens 222 is greater than or equal to 18 and less than or equal to 56.

[0154] In some embodiments, the second lens 221 and / or the third lens 222 is made of plastic.

[0155] In some embodiments, the object side surface S3 and / or the image side surface S4 of the second lens 221 are aspherical surfaces.

[0156] In some embodiments, the object side surface S5 and / or the image side surface S6 of the third lens 222 are aspherical surfaces.

[0157] Since the refractive index and Abbe number range of plastic materials are limited and their optical performance is not good, while the refractive index and Abbe number of glass materials have a relatively larger selectable range compared with plastic materials, it is easier to obtain ultra-thin lenses with strong aberration correction ability. The embodiments of the present application can adopt a hybrid design of glass and plastic lenses, and utilize the more choices of refractive index and Abbe number of glass to achieve a larger aperture.

[0158] In some embodiments, the lens group 20 includes a first lens 211, a second lens 221, and a third lens 222 arranged in sequence from the object side to the image side, where the first lens 211 has a positive optical power, and the superimposed value of the optical power of the second lens 221 and the optical power of the third lens 222 is negative. Exemplarily, the second lens 221 has a negative optical power and the third lens 222 has a negative optical power; or, the second lens 221 has a positive optical power and the third lens 222 has a negative optical power; or the second lens 221 has a negative optical power and the third lens 222 has a positive optical power.

[0159] According to the ranges given in the embodiments of the present application, through the configuration of the lenses and the combination of lenses with specific optical designs, the imaging module 200 can achieve a long focal length in a small-size space, and can obtain a larger aperture and / or target surface size, thereby obtaining high imaging performance. For ease of understanding, some specific but non-limiting examples of the embodiments of the present application are described in more detail below.

[0160] Example 1

[0161] The lens group 20 of an embodiment of the present application sequentially includes from the object side to the image side: a first lens 211, a second lens 221, and a third lens 222. In this embodiment, the effective focal length of the imaging module is 16.6 mm, and the aperture F value is 2.00. The corresponding design parameters are shown in Tables 1 and 2.

[0162] Table 1

[0163]

[0164] Table 2

[0165]

[0166] It should be noted that the focal length of -14.19 mm in Table 1 is the combined focal length of the second lens and the third lens. For the radius of curvature R of an optical surface, if it is a positive number, it means that the optical surface bulges towards the object side near the optical axis; if it is a negative number, it means that the optical surface bulges towards the image side near the optical axis.

[0167] It should also be noted that the axial distance between the object side surface S1 of the first lens and the subsequent optical surface refers to the axial distance between the object side surface S1 and the image side surface S2, that is, the axial thickness of the first lens. The axial distance between the image side surface S2 of the first lens and the subsequent optical surface refers to the axial distance between the image side surface S2 of the first lens and the object side surface S3 of the second lens, that is, the axial gap between the first lens and the second lens. The axial distance between the object side surface S3 of the second lens and the subsequent optical surface refers to the axial distance between the object side surface S3 and the image side surface S4, that is, the axial thickness of the second lens, and so on. The axial distance between the image side surface S6 of the third lens and the subsequent optical surface refers to the axial distance between the third lens and the incident surface of the prism, that is, the axial gap between the third lens and the prism.

[0168] In some other embodiments, the first lens can also be a glass aspherical surface or a plastic aspherical surface.

[0169] The surface profile description formula of the spherical surface (also called the standard surface) adopted in the embodiments of the present application is as follows, Formula (1):

[0170]

[0171] In Formula (1), z is the surface profile sag; c is the curvature; r is the radial coordinate in lens units; k is the conic coefficient.

[0172] The surface profile description formula of the aspherical surface (specifically, the extended aspherical surface) adopted in the embodiments of the present application is as follows, Formula (2):

[0173]

[0174] In Formula (2), the first expression is the same as Formula (1). Specifically, z is the surface profile sag, c is the curvature, r is the radial coordinate in lens units, and k is the conic coefficient. The second expression is the sum of the normalized coordinate power series. Since all the coefficients αi are expressed in lens units, the normalized radial coordinate ρ is used.

[0175] It can be understood that the above Formula (2) is merely exemplary. In other embodiments, other aspherical surface profile description formulas can also be adopted, which will not be elaborated here.

[0176] Example 2

[0177] The lens group 20 of an embodiment of the present application sequentially includes, from the object side to the image side: a first lens 211, a second lens 221, and a third lens 222. In this embodiment, the effective focal length of the imaging module 200 is 16.9 mm, and the aperture F value is 2.26. The corresponding design parameters are shown in Tables 3 and 4.

[0178] Table 3

[0179]

[0180] Table 4

[0181]

[0182] In some other embodiments, the first lens can also be a glass aspherical lens or a plastic aspherical lens.

[0183] Example 3

[0184] The lens group 20 of an embodiment of the present application sequentially includes, from the object side to the image side: a first lens 211 and a second lens 221. In this embodiment, the effective focal length of the imaging module 200 is 14.1 mm, and the aperture F value is 2.8. The corresponding design parameters are shown in Tables 5 and 6.

[0185] Table 5

[0186]

[0187] Table 6

[0188]

[0189] In some other embodiments, the first lens can also be a glass spherical lens or a plastic aspherical lens. The second lens can also be a glass aspherical lens.

[0190] The above are only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all of them should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. An imaging module, characterized in that, Applied to an electronic device, the camera module sequentially includes, from the object side to the image side: A lens group for receiving light from an object to be photographed, the light from the object to be photographed propagating in a first direction, and the first direction being the thickness direction of the electronic device; A prism for receiving and reflecting the light from the lens group, and the light from the lens group being emitted after undergoing two deflections in the prism; An image sensor for receiving the light from the prism to perform imaging.

2. The camera module according to claim 1, wherein The prism includes: An incident surface for receiving the light from the lens group, and the light from the lens group propagating in the first direction; A first reflecting surface for receiving the light from the incident surface and deflecting the propagation direction of the light from the incident surface from the first direction to a second direction, and the second direction being perpendicular to the first direction; A second reflecting surface for receiving the light from the first reflecting surface and deflecting the propagation direction of the light from the first reflecting surface from the second direction to a third direction, and the third direction being perpendicular to the second direction; An exit surface for receiving the light from the second reflecting surface, and the light from the second reflecting surface being emitted from the exit surface in the third direction.

3. The camera module according to claim 2, wherein The third direction is the same as the first direction.

4. The camera module according to claim 3, wherein, The incident surface is parallel to the exit surface, and the first reflecting surface is parallel to the second reflecting surface.

5. The camera module according to claim 4, wherein The incident surface, the first reflecting surface, the exit surface, and the second reflecting surface are sequentially connected end to end in sequence.

6. The imaging module according to claim 4 or 5, characterized in that, The prism is a parallelogram prism.

7. The camera module according to any one of claims 3 to 6, characterized in that The lens group and the image sensor are respectively located on both sides of the prism on the axis parallel to the first direction.

8. The camera module according to claim 2, characterized in that, The third direction is opposite to the first direction.

9. The camera module according to claim 8, wherein The incident surface is parallel to the exit surface, or the incident surface and the exit surface are located in the same plane; The first reflecting surface is perpendicular to the second reflecting surface.

10. The camera module according to claim 9, wherein, The incident surface and the exit surface are located in the same plane, and both ends of the incident surface in the second direction are respectively connected to the first reflecting surface and the second reflecting surface.

11. The camera module according to claim 9 or 10, characterized in that, The prism is a trapezoidal prism.

12. The camera module according to any one of claims 8 to 11, wherein The lens group and the image sensor are located on the same side of the prism on the axis parallel to the first direction.

13. The imaging module according to claim 2, wherein The third direction is perpendicular to the first direction.

14. The camera module according to claim 13, wherein The incident surface is perpendicular to the exit surface, and the first reflecting surface and the second reflecting surface are oppositely arranged.

15. The camera module according to claim 14, wherein The exit surface is respectively connected to the first reflecting surface and the second reflecting surface, and the incident surface is respectively connected to the first reflecting surface, the second reflecting surface, and the exit surface.

16. The camera module according to any one of claims 13 to 15, characterized in that, The lens group is located on the side of the prism facing the object to be photographed, and the image sensor is located on the side surface of the prism.

17. The imaging module according to any one of claims 2 to 16, characterized in that, The included angle between the first reflecting surface and the incident surface is 45°, and the included angle between the second reflecting surface and the exit surface is 45°.

18. The camera module according to any one of claims 1 to 17, characterized in that, The lens group includes a first lens group and a second lens group arranged in sequence from the object side to the image side. The combined focal length of the first lens group is greater than or equal to 8 mm and less than or equal to 10 mm, and the combined focal length of the second lens group is greater than or equal to -14 mm and less than or equal to -12 mm.

19. The imaging module according to any one of claims 1 to 18, wherein the aperture value of the imaging module is greater than or equal to 1.8 and less than or equal to 4; and / or the equivalent focal length of the imaging module is greater than or equal to 80 mm and less than or equal to 100 mm.

20. An electronic device, characterized in that, An imaging module includes any one of the imaging modules according to claims 1 to 19, wherein the incident direction of the incident light received by the lens group is consistent with the thickness direction of the electronic device.

Images