Camera module and electronic equipment

Abstract

The invention discloses a camera module and electronic equipment, and belongs to the technical field of camera modules, and the camera module comprises a lens assembly, a first reflection part, a second reflection part and a photosensitive part; the first reflecting part is arranged on the light incident side of the lens assembly; the second reflecting piece is arranged on the light emitting side of the lens assembly and comprises a first face, a second face and a third face, the first face is arranged opposite to the lens assembly, and the included angle between the second face and the first face is a first included angle which is an acute angle; the photosensitive component is opposite to the second surface; after passing through the first reflecting part and the lens assembly, light is transmitted into the second reflecting part from the first surface, is reflected by the second surface, the third surface and the first surface, is transmitted to the outside of the second reflecting part from the second surface, and is transmitted to the photosensitive part.

Description

Technical Field

[0001] The present application belongs to the technical field of camera modules, and specifically relates to a camera module and an electronic device. Background Art

[0002] In related art, electronic devices are equipped with camera modules equipped with telephoto lens assemblies, allowing the electronic devices to capture distant scenes through the telephoto lens assembly of the camera module. However, due to the long optical path of the telephoto lens assembly, the telephoto lens assembly occupies a large amount of internal space in the electronic device, hindering the miniaturization of the electronic device. Summary of the Invention

[0003] The present application aims to provide a camera module and electronic equipment, which at least solves the problem that the telephoto lens assembly occupies a large amount of internal space of the electronic equipment, which is not conducive to the miniaturization of the electronic equipment.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In the first aspect, an embodiment of the present application proposes a camera module, comprising a lens assembly, a first reflector, a second reflector and a photosensitive component; the first reflector is arranged on the light incident side of the lens assembly; the second reflector is arranged on the light exit side of the lens assembly, the second reflector comprises a first surface, a second surface and a third surface, the first surface is arranged opposite to the lens assembly, the angle between the second surface and the first surface is a first angle, and the first angle is an acute angle; the photosensitive component is opposite to the second surface; wherein, after passing through the first reflector and the lens assembly, the light is transmitted from the first surface to the second reflector, and then reflected by the second surface, the third surface and the first surface, and is transmitted from the second surface to the outside of the second reflector, and is transmitted to the photosensitive component.

[0006] In a second aspect, an embodiment of the present application proposes an electronic device, comprising a camera module as described in any of the above technical solutions.

[0007] In an embodiment of the present application, the second reflector includes a first surface, a second surface and a third surface. After the light passes through the first reflector and the lens assembly, it is transmitted from the first surface to the second reflector, and then reflected by the second surface, the third surface and the first surface, and is transmitted from the second surface to the outside of the second reflector and transmitted to the photosensitive component. The light is reflected three times in the second reflector by the second surface, the third surface and the first surface in sequence, which extends the transmission path of the light in the camera module, thereby increasing the focal length of the camera module, and thereby improving the telephoto shooting effect of the camera module; and because the optical path of the camera module is lengthened by setting the second reflector, while ensuring that the camera module has a larger focal length, the volume and length of the camera module are reduced, reducing the occupation of the internal space of the electronic device by the camera module, thereby reducing the influence of the volume and length of the camera module on the internal space and thickness of the electronic device, which is conducive to the miniaturization and thinness of the electronic device.

[0008] The angle between the second surface and the first surface is a first angle, and the first angle is an acute angle, so that the first surface can be used as an incident surface for light and as a reflection surface for light, and the second surface can be used as a reflection surface for light and as an exit surface for light, thereby realizing the reuse of the first surface and the second surface, simplifying the structure of the second reflector, and reducing the cost of the second reflector.

[0009] The angle between the second surface and the first surface is a first angle. The first angle is an acute angle, which allows light to be reflected three times within the second reflector, effectively increasing the focal length of the camera module and improving the camera module's telephoto shooting effect. The photosensitive component is opposite the second surface, allowing light to pass through the second reflector to form a clearer image on the photosensitive component, further improving the camera module's shooting effect.

[0010] The electronic device includes a camera module as in any of the above technical solutions, and thus the electronic device has all the beneficial effects of the camera module as in any of the above technical solutions.

[0011] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0013] Figure 1 1 is a schematic structural diagram (top view) of a camera module according to an embodiment of the present invention;

[0014] Figure 2 1 is a schematic structural diagram (cross-sectional view) of a camera module according to an embodiment of the present invention;

[0015] Figure 3 2 is a schematic structural diagram (top view) of a camera module according to an embodiment of the present invention;

[0016] Figure 4 2 is a second structural schematic diagram (cross-sectional view) of a camera module according to an embodiment of the present invention;

[0017] Figure 5 3 is a schematic structural diagram (top view) of a camera module according to an embodiment of the present invention;

[0018] Figure 6 FIG3 is a third structural schematic diagram (cross-sectional view) of a camera module according to an embodiment of the present invention;

[0019] Figure 7 FIG4 is a fourth structural diagram (top view) of a camera module according to an embodiment of the present invention;

[0020] Figure 8 FIG4 is a fourth structural schematic diagram (cross-sectional view) of a camera module according to an embodiment of the present invention;

[0021] Figure 9 FIG5 is a fifth structural diagram (top view) of a camera module according to an embodiment of the present invention;

[0022] Figure 10 FIG5 is a fifth structural schematic diagram (cross-sectional view) of a camera module according to an embodiment of the present invention;

[0023] Figure 11 FIG6 is a sixth structural diagram (top view) of a camera module according to an embodiment of the present invention;

[0024] Figure 12 FIG6 is a sixth structural schematic diagram (cross-sectional view) of a camera module according to an embodiment of the present invention;

[0025] Figure 13 is one of the axial chromatic aberration diagrams of the camera module according to an embodiment of the present invention;

[0026] Figure 14 is one of the defocus modulation transfer function curves of the camera module according to an embodiment of the present invention;

[0027] Figure 15 This is a second axial chromatic aberration diagram of the camera module according to an embodiment of the present invention;

[0028] Figure 16 This is the second defocus modulation transfer function curve diagram of the camera module according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] 100 lens assembly, 110 lens, 112 second lens, 114 third lens, 120 first lens, 130 second lens, 140 third lens, 150 fourth lens, 160 fixed lens assembly, 170 autofocus lens assembly, 200 first reflector, 210 fourth surface, 220 fifth surface, 230 sixth surface, 300 second reflector, 310 first surface, 320 second surface, 330 third surface, 400 photosensitive component, 500 first lens, 600 filter. DETAILED DESCRIPTION

[0031] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of this application.

[0032] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Furthermore, the term "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] The following combination Figures 1 to 16 A camera module and an electronic device according to an embodiment of the present invention are described.

[0036] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the camera module includes a lens assembly 100, a first reflector 200, a second reflector 300 and a photosensitive component 400; the first reflector 200 is arranged on the light incident side of the lens assembly 100; the second reflector 300 is arranged on the light exit side of the lens assembly 100, the second reflector 300 includes a first surface 310, a second surface 320 and a third surface 330, the first surface 310 is arranged opposite to the lens assembly 100, the angle between the second surface 320 and the first surface 310 is a first angle a, and the first angle a is an acute angle; the photosensitive component 400 is opposite to the second surface 320; wherein, as shown in FIG. Figure 2 As shown, the light along Figure 2 The light propagates in the direction indicated by the middle arrow. After passing through the first reflector 200 and the lens assembly 100, the light is transmitted from the first surface 310 to the inside of the second reflector 300. After being reflected by the second surface 320, the third surface 330 and the first surface 310, the light is transmitted from the second surface 320 to the outside of the second reflector 300 and is transmitted to the photosensitive component 400.

[0037] According to the camera module provided in the embodiment of the present application, it includes a lens assembly 100, a first reflector 200, a second reflector 300 and a photosensitive component 400. The first reflector 200, the lens assembly 100 and the second reflector 300 are arranged in sequence along the direction of light transmission. When the electronic device is shooting through the camera module, the light passes through the first reflector 200, the lens assembly 100 and the second reflector 300 in sequence, and is imaged on the photosensitive component 400, thereby realizing the shooting function of the camera module.

[0038] The second reflector 300 includes a first surface 310, a second surface 320, and a third surface 330. After passing through the first reflector 200 and the lens assembly 100, the light is transmitted from the first surface 310 to the inside of the second reflector 300, and then reflected by the second surface 320, the third surface 330, and the first surface 310. Then, the light is transmitted from the second surface 320 to the outside of the second reflector 300 and transmitted to the photosensitive component 400. The light is reflected three times in the second reflector 300 by the second surface 320, the third surface 330, and the first surface 310 in sequence. The second reflector 300 is provided to lengthen the optical path of the camera module, thereby increasing the focal length of the camera module and improving the telephoto shooting effect of the camera module. Furthermore, since the optical path of the camera module is lengthened by setting the second reflector 300, while ensuring that the camera module has a larger focal length, the volume and length of the camera module are reduced, and the occupation of the internal space of the electronic device by the camera module is reduced, thereby reducing the influence of the volume and length of the camera module on the internal space and thickness of the electronic device, which is conducive to the miniaturization and thinness of the electronic device.

[0039] The angle between the second surface 320 and the first surface 310 is a first angle a, which is an acute angle, so that the first surface 310 can be used as the incident surface of the light and the reflection surface of the light, and the second surface 320 can be used as the reflection surface of the light and the exit surface of the light, thereby realizing the reuse of the first surface 310 and the second surface 320, simplifying the structure of the second reflector 300, and reducing the cost of the second reflector 300.

[0040] The angle between the second surface 320 and the first surface 310 is a first angle a. This acute angle a allows light to be reflected three times within the second reflector 300, effectively increasing the focal length of the camera module and enhancing the camera module's telephoto shooting effect. The photosensitive component 400 faces the second surface 320, allowing light to pass through the second reflector 300 to form a clearer image on the photosensitive component 400, further enhancing the camera module's shooting effect.

[0041] The light first passes through the first reflector 200, which not only changes the light transmission path, but also further increases the focal length of the camera module. When the first reflector 200 changes the light transmission path, the arrangement direction of the first reflector 200, the lens assembly 100 and the second reflector 300 is also changed, thereby reducing the space restriction of the electronic device in the thickness direction on the camera module.

[0042] The camera module provided in the present application adopts a centrally placed lens assembly 100, and adds folding prisms in front and behind the lens assembly 100, thereby reducing the size of the camera module and increasing the portability of the electronic device.

[0043] Furthermore, the light is transmitted to the first reflector 200 along the first optical axis X, and is transmitted along the second optical axis Y after being reflected by the first reflector 200. The first reflector 200, the lens assembly 100 and the second reflector 300 are arranged side by side along the second optical axis Y.

[0044] The first optical axis X and the second optical axis Y are perpendicular to each other.

[0045] Furthermore, the first reflective element 200 may be a prism, a plane mirror, or other types of reflective components with a reflective surface.

[0046] The second reflective element 300 is a prism.

[0047] The photosensitive component 400 is a photosensitive chip, that is, an imaging surface and a light receiver. The object side light is refracted by the imaging lens and then imaged on the chip.

[0048] Furthermore, the second surface 320 is provided with a coating, thereby improving the light reflection effect of the second surface 320 .

[0049] Furthermore, the camera module also includes a filter 600, which is disposed between the second reflector 300 and the photosensitive component 400. The substrate is flat glass, and the surface is coated with an AR anti-reflective coating and an infrared (IR) cut-off film to filter near-infrared light.

[0050] Specifically, the focal length referred to in this application refers to a measure of the ability of an optical system to focus or diverge light. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane, when an infinitely distant scene is formed into a sharp image on the focal plane through the lens or lens group. It can also be understood as the distance from the center of lens assembly 100 to the imaging plane.

[0051] The optical power mentioned in this application represents the refractive power of a lens for an incident parallel light beam.

[0052] The field of view (FOV) mentioned in this application is the angle between the two edges of the lens, with the lens as the vertex, and the maximum range through which the image of the subject can pass. The size of the FOV determines the field of view of the lens. The larger the FOV, the wider the field of view.

[0053] The half field of view (HFOV) mentioned in this application refers to half of the field of view.

[0054] The aperture, as used in this application, is a device used to control the amount of light entering an electronic device through a lens. Typically, within a lens, the aperture size is expressed as an f-number. The f-number (F#) is a relative value calculated by dividing the focal length of the lens by the diameter of the lens (the inverse of the relative aperture). A smaller F# value means more light enters per unit time, resulting in a smaller depth of field, blurring the background in the photo, creating an effect similar to a telephoto lens.

[0055] The side of the lens assembly 100 where the object is located is the object side, and the side of the lens facing the object side is the object side surface of the lens.

[0056] The side of the lens assembly 100 where the image of the object is located is called the image side, and the side of the lens facing the image side is called the image side surface.

[0057] Specifically, if Figure 2 As shown, the light along Figure 2 The light propagates in the direction indicated by the middle arrow. By matching the dimensions of the first reflector 200, the lens assembly 100 and the second reflector 300, the light can be focused within a certain range, so that when the light is transmitted from the first surface 310 to the second reflector 300, the light can be transmitted to the second surface 320, so that the light can be transmitted along the Figure 2 The direction of the arrow in FIG. 1 is transmitted to the photosensitive member 400 .

[0058] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the angle between the third surface 330 and the second surface 320 is the second angle b, the angle between the third surface 330 and the first surface 310 is the third angle d, and the angle of the second angle b is equal to the angle of the third angle d.

[0059] In this embodiment, the angle of the second angle b is equal to the angle of the third angle d. After the light is reflected by the third surface 330 and transmitted to the first surface 310, it will still be totally reflected by the first surface 310, thereby reducing the loss of light during the transmission process in the second reflective element 300, improving the clarity of the image on the photosensitive component 400, and further improving the shooting effect of the camera module.

[0060] Specifically, the angle of the first angle a can be 45 degrees, and the angles of the second angle b and the third angle d can both be 67.5 degrees. The second reflector 300 with this structure enables the camera module to have a zoom ratio of more than 8 times. Compared with the camera module that can zoom 3 to 5 times in the related art, the zoom capability of the camera module is significantly improved, and the length of the camera module will not be too long, reducing the internal space occupied by the electronic device. The camera module provided in this application has a long equivalent focal length and can be used with an ultra-telephoto optical system of more than 8 times. The telephoto capability of the camera module is enhanced, which improves the user experience.

[0061] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the light passing through the lens assembly 100 is perpendicular to the first surface 310 ; and / or the light reflected by the first surface 310 is perpendicular to the second surface 320 .

[0062] In this embodiment, the light passing through the lens assembly 100 is perpendicular to the first surface 310, allowing the light to pass through the first surface 310 and enter the interior of the second reflector 300, thereby reducing the loss of light during transmission within the second reflector 300, improving the clarity of the image on the photosensitive component 400, and further improving the shooting effect of the camera module. The light reflected from the first surface 310 is perpendicular to the second surface 320, allowing the light to pass through the second surface 320 and reach the photosensitive component 400, thereby reducing the loss of light during transmission within the second reflector 300, improving the clarity of the image on the photosensitive component 400, and further improving the shooting effect of the camera module.

[0063] Furthermore, the first surface 310 is perpendicular to the second optical axis Y.

[0064] According to some embodiments of the present invention, Figures 1 to 4 As shown, the first reflector 200 includes a fourth surface 210, a fifth surface 220 and a sixth surface 230. Light is transmitted through the fourth surface 210 to the interior of the first reflector 200, and after being reflected by the fifth surface 220, is transmitted through the sixth surface 230 to the lens assembly 100.

[0065] In this embodiment, the first reflector 200 includes a fourth surface 210, a fifth surface 220 and a sixth surface 230. The light is transmitted through the fourth surface 210 to the interior of the first reflector 200, and after being reflected by the fifth surface 220, it is transmitted through the sixth surface 230 to the lens assembly 100. While changing the light transmission path, the focal length of the camera module is further increased. When the first reflector 200 changes the light transmission path, the arrangement direction of the first reflector 200, the lens assembly 100 and the second reflector 300 is also changed, thereby reducing the space restriction of the electronic device in the thickness direction on the camera module.

[0066] Specifically, when the electronic device captures a scene through the camera module, light passes through the fourth surface 210 in a direction perpendicular to the fourth surface 210 and enters the interior of the first reflector 200. Inside the first reflector 200, the light passes through the fifth surface 220, where it is reflected by the fifth surface 220 to the sixth surface 230. The light then passes through the sixth surface 230 in a direction perpendicular to the sixth surface 230 and passes to the lens assembly 100. After passing through the lens assembly 100, the light passes through the first surface 310 in a direction perpendicular to the first surface 310 and into the second reflector 300. The light then reflects off the second surface 320, the third surface 330, and the first surface 310, and then passes through the second surface 320 in a direction perpendicular to the second surface 320 to the outside of the second reflector 300 and passes to the photosensitive component 400, where an image is formed on the photosensitive component 400.

[0067] Specifically, the angle between the fourth surface 210 and the fifth surface 220 is 45 degrees, the angle between the fifth surface 220 and the sixth surface 230 is 45 degrees, and the angle between the fourth surface 210 and the sixth surface 230 is 90 degrees.

[0068] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the fourth surface 210 is convex, and / or the sixth surface 230 is concave.

[0069] In this embodiment, the fourth surface 210 is convex and / or the sixth surface 230 is concave, which allows the first reflector 200 to have a certain optical power, reducing the size of the lens assembly 100 and the second reflector 300, thereby reducing the overall length of the camera module and improving the close-range shooting capability of the camera module. The first reflector 200 has a certain optical power, which can also reduce the anti-shake sensitivity of the first reflector 200, further improving the shooting effect of the camera module.

[0070] Specifically, the first reflector 200 has positive optical power, which can reduce the size of the lens assembly 100 and the second reflector 300. Furthermore, the optical power f1 of the first reflector 200 and the focal length efl of the camera module satisfy the relationship: 5≤f1 / efl, thereby reducing the sensitivity of the prism anti-shake function.

[0071] Specifically, the light along Figure 4 Propagates in the direction indicated by the arrow.

[0072] According to some embodiments of the present invention, Figure 5 and Figure 6 As shown, the camera module also includes a first lens 500 , which is arranged on the light incident side of the first reflector 200 , and the light is transmitted to the first reflector 200 after passing through the first lens 500 .

[0073] In this embodiment, the first lens 500 is disposed on the light-entering side of the first reflector 200. Light passes through the first lens 500 and is transmitted to the first reflector 200. The combination of the first lens 500 and the first reflector 200 provides the front reflective component with a certain optical power, thereby reducing the size of the lens assembly 100 and the second reflector 300, thereby reducing the overall length of the camera module and improving the close-range shooting capability of the camera module. The combination of the first lens 500 and the first reflector 200 provides the front reflective component with a certain optical power and can also reduce the anti-shake sensitivity of the first reflector 200, further improving the shooting effect of the camera module.

[0074] Specifically, the light along Figure 6 Propagates in the direction indicated by the arrow.

[0075] According to some embodiments of the present invention, Figure 3 、 Figure 4 、 Figure 7 and Figure 8 As shown, the lens assembly 100 includes a plurality of lenses 110, which are arranged along the light transmission direction. The plurality of lenses 110 include at least one second lens 112 with positive optical power and at least one third lens 114 with negative optical power.

[0076] In this embodiment, the multiple lenses 110 include at least one second lens 112 with positive optical power and at least one third lens 114 with negative optical power, which effectively improves the optical performance of the lens assembly 100, reduces aberrations, and thereby improves the clarity and quality of imaging of the camera module.

[0077] like Figure 3 and Figure 4 As shown, the multiple lenses 110 include three aspherical lenses 110, which are a first lens 120, a second lens 130, and a third lens 140 from the object side to the image side along the second optical axis Y. The first lens 120 has positive focal length, the object side surface of the first lens 120 is convex, and the Abbe number Vd1 of the object side surface of the first lens 120 satisfies Vd1>50; the second lens 130 has negative focal length, the image side surface of the second lens 130 is concave, and the Abbe number Vd2 of the image side surface of the second lens 130 satisfies Vd2<40; the third lens 140 has positive focal length, the object side surface of the third lens 140 is convex, and the image side surface of the third lens 140 is concave. Light rays along Figure 4 Propagates in the direction indicated by the arrow.

[0078] like Figure 7 and Figure 8As shown, the multiple lenses 110 include four aspherical lenses 110, which are the first lens 120, the second lens 130, the third lens 140, and the fourth lens 150 from the object side to the image side along the second optical axis Y. The first lens 120 has positive focal power, the object side surface of the first lens 120 is convex, and the Abbe number Vd1 of the object side surface of the first lens 120 satisfies Vd1>50; the second lens 130 has positive focal power, the object side surface of the second lens 130 is convex, and the image side surface of the second lens 130 is concave; the third lens 140 has negative focal power, the image side surface of the third lens 140 is concave, and the Abbe number of the image side surface of the third lens 140 satisfies Vd2<40, and the fourth lens 150 has positive focal power. Light rays are directed along Figure 8 Propagates in the direction indicated by the arrow.

[0079] According to some embodiments of the present invention, Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, the lens assembly 100 includes a fixed lens assembly 160 and an auto-focus lens assembly 170 . The auto-focus lens assembly 170 and the fixed lens assembly 160 are arranged along the light transmission direction, and the auto-focus lens assembly 170 is located on the light incident side or the light exit side of the fixed lens assembly 160 .

[0080] In this embodiment, the autofocus lens assembly 170 and the fixed lens assembly 160 are arranged along the direction of light transmission, and the autofocus lens assembly 170 is located on the light incident side or the light exit side of the fixed lens assembly 160, further improving the optical performance of the lens assembly 100, thereby improving the clarity and quality of imaging of the camera module.

[0081] Specifically, if Figure 9 and Figure 10 As shown, the lens assembly 100 includes a fixed lens assembly 160 and an autofocus lens assembly 170, the front group is the fixed lens assembly 160, the rear group is the autofocus (AF) lens 110 assembly, and the fixed lens assembly 160 and the autofocus lens assembly 170 are arranged along the second optical axis Y. Figure 10 Propagates in the direction indicated by the arrow.

[0082] Specifically, if Figure 11 and Figure 12 As shown, the lens assembly 100 includes a fixed lens assembly 160 and an auto-focus lens assembly 170, the rear group is the fixed lens assembly 160, the front group is the auto-focus lens assembly 170, and the fixed lens assembly 160 and the auto-focus lens assembly 170 are arranged along the second optical axis Y. Figure 12 Propagates in the direction indicated by the arrow.

[0083] According to some embodiments of the present invention, the first reflective element 200 is a front reflective element, and the second reflective element 300 is a rear reflective element.

[0084] The lens surfaces of the first reflector 200, the lens assembly 100, and the second reflector 300 are even aspherical surfaces, satisfying the aspherical surface formula describing aspherical surfaces:

[0085]

[0086] Among them, the parameter c = 1 / R, R is the radius of the lens surface, c is the curvature corresponding to the radius of the head and neck surface; r is the vertical distance from a point on the optical surface to the optical axis; z represents the sagittal height of the point along the optical axis; k is the quadratic surface coefficient of the surface, and Ai represents the i-th order aspheric coefficient.

[0087] The front reflector is a prism with optical power, the object side is convex, and the image side is concave. The light is incident along the first optical axis X, reflected by the reflective surface, and then emitted along the second optical axis Y.

[0088] The front reflector has positive optical power, which reduces the size of the lens and triangular prism. Furthermore, its optical power f1 and the system focal length efl satisfy the relationship of 5 ≤ f1 / efl, reducing the sensitivity of the prism image stabilization.

[0089] The lens assembly 100 includes three aspherical lenses 110, which are arranged along the second optical axis Y from the object side to the image side in order: a first lens 120, a second lens 130, and a third lens 140. The first lens 120 has positive optical power, its object side surface is convex, and its Abbe number Vd1 satisfies Vd1>50. The second lens 130 has negative optical power, its image side surface is concave, and its Abbe number Vd2 satisfies Vd2<40. The third lens 140 has positive optical power, its object side surface is convex, and its image side surface is concave.

[0090] The rear reflector is a triangular prism. One angle of the triangular prism is 45 degrees, and the other two angles are 67.5 degrees, forming two faces with a 45-degree angle. One of the faces is perpendicular to the second optical axis Y. Light is incident through this face, reflects three times in the triangular prism, and is emitted through the other face forming a 45-degree angle.

[0091] The basic specifications of the camera module provided in this embodiment are shown in Table 1.

[0092] Table 1

[0093] efl F# DFOV f1 f2 L 30.3mm 3.1 13.5° 199.9mm 32.7mm 31.3mm

[0094] Wherein efl is the focal length of the camera module, F# is the aperture of the camera module, DFOV is the field of view angle, f1 is the focal length of the front reflector, f2 is the focal length of the lens assembly 100, and L is the length of the camera module along the second optical axis Y direction.

[0095] Table 2 shows the surface type, curvature radius, thickness, refractive index and Abbe number of each lens of the camera module in this embodiment.

[0096] Table 2

[0097]

[0098]

[0099] Along the direction of light transmission, the surfaces of each component are numbered from S1 to S17. The thickness refers to the transmission distance of light between the two surfaces. The positive and negative conversion of the thickness represents the change of the light transmission direction.

[0100] Table 3 shows the aspheric high-order coefficients of the various lens surfaces in this embodiment.

[0101] Table 3

[0102] Surface number K A4 A6 A8 A10 A12 A14 A16 S1 0.00E+00 9.06E-06 4.80E-08 -1.68E-09 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S4 (stop) 0.00E+00 -2.27E-04 1.38E-05 -4.03E-08 3.72E-08 -9.52E-10 0.00E+00 0.00E+00 S5 0.00E+00 -3.83E-06 -2.17E-05 7.65E-06 -3.40E-07 2.87E-09 0.00E+00 0.00E+00 S6 0.00E+00 8.14E-03 -7.32E-04 3.95E-05 -9.29E-07 0.00E+00 0.00E+00 0.00E+00 S7 0.00E+00 1.37E-02 -1.26E-03 1.13E-04 -9.26E-06 7.69E-07 -3.96E-08 9.28E-10 S8 0.00E+00 5.67E-03 1.71E-04 2.21E-05 -6.97E-06 9.63E-07 -5.15E-08 9.73E-10 S9 0.00E+00 3.33E-03 2.70E-04 1.68E-05 -1.12E-05 1.95E-06 -1.45E-07 3.99E-09

[0103] like Figure 13 As shown, the five solid curves in the chromatic aberration diagram represent light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. It can be seen that the axial chromatic aberration of the lens of this embodiment is controlled within a very small range, and the chromatic aberration converges well. Figure 13 The horizontal axis represents the distance between a certain position in the optical axis direction and the photosensitive member 400, with the unit being millimeters. Figure 13 The middle vertical axis represents the height of the entrance pupil in millimeters.

[0104] like Figure 14 As shown in the graph of the defocus modulation transfer function (MTF), it can be seen that at a spatial frequency of 100 lp / mm, the full-field modulation transfer function (MTF) is greater than 0.6, which has extremely high resolution. Figure 14 The horizontal axis represents the distance between a certain position in the optical axis direction and the photosensitive member 400, with the unit being millimeters. Figure 14 The middle vertical axis represents contrast.

[0105] According to some embodiments of the present invention, the first reflective element 200 is a front reflective element, and the second reflective element 300 is a rear reflective element.

[0106] The front reflector is a right-angle prism and has no optical power.

[0107] The lens assembly 100 includes four aspherical lenses 110, which are arranged along the second optical axis Y from the object side to the image side in order: a first lens 120, a second lens 130, a third lens 140, and a fourth lens 150. The first lens 120 has positive focal power, the object side surface of the first lens 120 is convex, and the Abbe number Vd1 of the object side surface of the first lens 120 satisfies Vd1>50; the second lens 130 has positive focal power, the object side surface of the second lens 130 is convex, and the image side surface of the second lens 130 is concave; the third lens 140 has negative focal power, the image side surface of the third lens 140 is concave, and the Abbe number of the image side surface of the third lens 140 satisfies Vd2<40, and the fourth lens 150 has positive focal power.

[0108] The rear reflector is a triangular prism. One angle of the triangular prism is 45 degrees, and the other two angles are 67.5 degrees, forming two faces with a 45-degree angle. One of the faces is perpendicular to the second optical axis Y. Light is incident through this face, reflects three times in the triangular prism, and is emitted through the other face forming a 45-degree angle.

[0109] The basic specifications of the camera module provided in this embodiment are shown in Table 4.

[0110] Table 4

[0111] efl F# DFOV f1 f2 L 33.3 2.9 12.3 unlimited 33.3mm 36mm

[0112] Where efl is the system focal length, F# is the system aperture, DFOV is the field of view angle, f1 is the focal length of the front reflector, f2 is the focal length of the lens, and L is the length of the optical system along the second optical axis Y direction.

[0113] Table 5 shows the surface type, curvature radius, thickness, refractive index and Abbe number of each lens of the camera module in this embodiment.

[0114] Table 5

[0115]

[0116]

[0117] Along the direction of light transmission, the surfaces of each component are numbered from S1 to S19. The thickness refers to the transmission distance of light between the two surfaces. The positive and negative conversion of the thickness represents the change of the light transmission direction.

[0118] Table 6 shows the aspheric high-order coefficients of the various lens surfaces in this embodiment.

[0119] Table 6

[0120]

[0121] like Figure 15 As shown, the five solid curves in the chromatic aberration diagram represent light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. It can be seen that the axial chromatic aberration of the lens of this embodiment is controlled within a very small range, and the chromatic aberration converges well. Figure 15 The horizontal axis represents the distance between a certain position in the optical axis direction and the photosensitive member 400, with the unit being millimeters. Figure 15 The middle vertical axis represents the height of the entrance pupil in millimeters.

[0122] like Figure 16 As shown in the defocus diagram of the defocus modulation transfer function (Defocused MTF), it can be seen that at a spatial frequency of 100lp / mm, the full-field modulation transfer function (MTF) is greater than 0.6, which has extremely high resolution. Figure 16 The horizontal axis represents the distance between a certain position in the optical axis direction and the photosensitive member 400, with the unit being millimeters. Figure 16 The middle vertical axis represents contrast.

[0123] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the first angle a is greater than or equal to 35 degrees and less than or equal to 55 degrees.

[0124] In this embodiment, the first angle a is greater than or equal to 35 degrees, thereby preventing the second reflector 300 from being too large due to the third internal reflection of the light, thereby reducing the volume and length of the camera module and reducing the internal space occupied by the camera module in the electronic device. The first angle a is less than or equal to 55 degrees, so that after light passes through the first surface 310 and enters the interior of the second reflector 300, it can be totally reflected when passing to the second surface 320 and then to the first surface 310 again, thereby reducing the loss of light when passing through the interior of the second reflector 300, improving the clarity of the image on the photosensitive component 400, and improving the shooting effect of the camera module.

[0125] Specifically, the first angle a may be 35 degrees.

[0126] The first angle a may be 40 degrees.

[0127] The first angle a may be 45 degrees.

[0128] The first angle a may be 50 degrees.

[0129] The first angle a may be 55 degrees.

[0130] According to some embodiments of the present invention, the electronic device includes the camera module as described in any of the above embodiments. Therefore, the electronic device has all the beneficial effects of the camera module as described in any of the above embodiments.

[0131] Furthermore, the electronic device includes a mobile phone, a tablet computer, a smart wearable device, an e-book or a laptop computer.

[0132] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0133] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A camera module, characterized in that: include: lens assembly; a first reflector disposed on a light incident side of the lens assembly; a second reflector, the second reflector being disposed on a light-emitting side of the lens assembly, the second reflector comprising a first surface, a second surface, and a third surface, the first surface being disposed opposite the lens assembly, the second surface and the first surface having an angle of first angle, the first angle being an acute angle; a photosensitive member, the photosensitive member being opposite to the second surface; Among them, after passing through the first reflector and the lens assembly, the light is transmitted from the first surface to the second reflector, and then reflected by the second surface, the third surface and the first surface, and is transmitted from the second surface to the outside of the second reflector and transmitted to the photosensitive component.

2. The camera module according to claim 1, wherein: The angle between the third surface and the second surface is the second angle, the angle between the third surface and the first surface is the third angle, and the angle of the second angle is equal to the angle of the third angle.

3. The camera module according to claim 2, wherein: The light passing through the lens assembly is perpendicular to the first surface; and / or The light reflected by the first surface is perpendicular to the second surface.

4. The camera module according to claim 1, wherein: The first reflector includes a fourth surface, a fifth surface, and a sixth surface. Light is transmitted through the fourth surface to the interior of the first reflector, and after being reflected by the fifth surface, is transmitted through the sixth surface to the lens assembly.

5. The camera module according to claim 4, wherein: The fourth surface is a convex surface, and / or the sixth surface is a concave surface.

6. The camera module according to claim 1, wherein: Also includes: The first lens is disposed on the light incident side of the first reflector, and light is transmitted to the first reflector after passing through the first lens.

7. The camera module according to any one of claims 1 to 6, characterized in that: The lens assembly comprises: A plurality of lenses are arranged along a light transmission direction, and the plurality of lenses include at least one second lens with positive optical power and at least one third lens with negative optical power.

8. The camera module according to any one of claims 1 to 6, characterized in that: The lens assembly comprises: Fixed lens assembly; An autofocus lens assembly, wherein the autofocus lens assembly and the fixed lens assembly are arranged along a light transmission direction, and the autofocus lens assembly is located on a light incident side or a light exit side of the fixed lens assembly.

9. The camera module according to any one of claims 1 to 6, characterized in that: The first angle is greater than or equal to 35 degrees and less than or equal to 55 degrees.

10. An electronic device, characterized in that: Comprising a camera module as described in any one of claims 1 to 9.

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