Camera and electronic device

Abstract

This application discloses a camera and an electronic device, belonging to the field of camera technology. The camera includes: a lens and a photosensitive component, the photosensitive component being located on the image side of the lens, and the focal length of the lens being a first focal length; the lens, from the object side to the image side, includes: a first lens, a second lens, a third lens, a fourth lens, and a correction lens group; the first lens has negative optical power; the second lens has optical power, the focal length of the second lens being a second focal length, and the absolute value of the ratio of the second focal length to the first focal length being greater than or equal to 5; the third lens has positive optical power, the focal length of the third lens being a third focal length, and the ratio of the third focal length to the first focal length being greater than or equal to 1.2 and less than or equal to 2.0; the fourth lens has positive optical power, the focal length of the fourth lens being a fourth focal length, and the fourth focal length being greater than the third focal length; the total length of the lens from the object side to the image side is less than or equal to twice the half-image height.

Description

Technical Field

[0001] This application belongs to the field of camera technology, and more specifically relates to a camera and an electronic device. Background Technology

[0002] With the widespread use of smartphones, the camera function has become increasingly important and has become a key factor for consumers when choosing a device. Smartphones typically have multiple cameras.

[0003] However, the limited internal space of smartphones results in some cameras being smaller in size, and the matching light-sensing components are also smaller, which affects the shooting effect of smartphones. Summary of the Invention

[0004] This application aims to provide a camera and electronic device that can solve the technical problem of the excessively small photosensitive component of a small-sized camera.

[0005] In a first aspect, this application provides a camera, including: a lens and a photosensitive component, the photosensitive component being located on the image side of the lens, and the focal length of the lens being a first focal length;

[0006] The lens, from the object side to the image side, consists of: a first lens, a second lens, a third lens, a fourth lens, and a correction lens group.

[0007] The first lens has negative optical power;

[0008] The second lens has optical power, the focal length of the second lens is the second focal length, and the absolute value of the ratio of the second focal length to the first focal length is greater than or equal to 5.

[0009] The third lens has positive optical power, the focal length of the third lens is the third focal length, and the ratio of the third focal length to the first focal length is greater than or equal to 1.2 and less than or equal to 2.0.

[0010] The fourth lens has positive optical power, and its focal length is the fourth focal length, which is greater than the third focal length.

[0011] The correction lens group is used to correct the aberrations produced by the first lens, second lens, third lens and fourth lens;

[0012] Among them, the total length of the lens from the object side to the image side is less than or equal to twice the half-image height.

[0013] Secondly, this application provides an electronic device, comprising:

[0014] The camera provided in the first aspect embodiment.

[0015] The camera provided in this application includes a lens and a photosensitive component. The photosensitive component is located on the image side of the lens. Light passes through the lens and illuminates the photosensitive component to form an image. The focal length of the lens is a first focal length.

[0016] The lens consists of, from the object side to the image side, the following components: a first lens, a second lens, a third lens, a fourth lens, and a correction lens group. The correction lens group is mainly used to correct the aberrations caused by the refraction of light through the first, second, third, and fourth lenses.

[0017] The first lens has negative optical power, which allows it to receive light at a wide angle and change the direction of edge light, thus reducing distortion.

[0018] The second lens has optical power, and its focal length is the second focal length. The absolute value of the ratio of the second focal length to the first focal length is greater than or equal to 5. That is, the second lens has a lower degree of refraction. The second lens mainly plays the role of light transition, so that light can be better propagated to the third lens.

[0019] The third lens has positive optical power, and its focal length is the third focal length. The ratio of the third focal length to the first focal length is greater than or equal to 1.2 and less than or equal to 2.0. In other words, the third lens has a greater degree of refraction, thus converging the light and bearing the main optical power of the camera.

[0020] The fourth lens has positive optical power and its focal length is the fourth focal length, which is greater than the third focal length. The fourth lens mainly serves as a light transition, stabilizing the light path so that the light can better propagate to the correction lens group. The correction lens group can then correct aberrations and improve image quality.

[0021] Furthermore, the total length of the lens from the object side to the image side is less than or equal to twice the half-image height. Through the cooperation of the first lens, the second lens, the third lens, the fourth lens and the correction lens group, the size of the lens is reduced. Moreover, the total length of the lens from the object side to the image side is less than or equal to twice the half-image height, which helps to increase the target surface size of the photosensitive component. This allows the camera to have a large target surface size while maintaining a small size, thereby improving the imaging effect of the camera. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is one of the schematic diagrams of a camera according to an embodiment of this application;

[0024] Figure 2 This is a second schematic diagram of a camera according to an embodiment of this application;

[0025] Figure 3 Is it like this? Figure 2 A schematic diagram of the axial spherical aberration of the camera module shown;

[0026] Figure 4 Is it like this? Figure 2 The MTF diagram of the camera module shown;

[0027] Figure 5 This is a third schematic diagram of a camera according to an embodiment of this application;

[0028] Figure 6 Is it like this? Figure 5 A schematic diagram of the axial spherical aberration of the camera module shown;

[0029] Figure 7 Is it like this? Figure 5 The MTF diagram of the camera module shown;

[0030] Figure 8 This is a fourth schematic diagram of a camera according to an embodiment of this application;

[0031] Figure 9 Is it like this? Figure 8 A schematic diagram of the axial spherical aberration of the camera module shown;

[0032] Figure 10 Is it like this? Figure 8 The MTF diagram of the camera module shown;

[0033] Figure 11 This is the fifth schematic diagram of a camera according to an embodiment of this application;

[0034] Figure 12 This is a sixth schematic diagram of a camera according to an embodiment of this application.

[0035] Figure label:

[0036] 1. Camera, 11. Lens, L1 first lens, S1 first surface, S2 second surface, L2 second lens, S3 third surface, S4 fourth surface, L3 third lens, S5 fifth surface, S6 sixth surface, L4 fourth lens, S7 seventh surface, S8 eighth surface, 111 correction lens group, L5 fifth lens, S9 ninth surface, S10 tenth surface, L6 sixth lens, S11 eleventh surface, S12 twelfth surface, L7 seventh lens, S13 thirteenth surface, S14 fourteenth surface, L8 eighth lens, S15 fifteenth surface, S16 sixteenth surface, 12. Photosensitive element, 121. Filter, S17 seventeenth surface, S18 eighteenth surface, 122. Sensor, S19 nineteenth surface, 13. Aperture. Detailed Implementation

[0037] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0038] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0039] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] The following is combined with Figures 1 to 12 This application describes a camera 1 and an electronic device according to embodiments thereof.

[0042] Firstly, such as Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figure 11 and Figure 12As shown, this application provides a camera 1, including: a lens 11 and a photosensitive component 12, the photosensitive component 12 being located on the image side of the lens 11, and the focal length of the lens 11 being a first focal length efl; the lens 11 includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a correction lens group 111; the first lens L1 has negative optical power; the second lens L2 has optical power, the focal length of the second lens L2 being a second focal length, and the absolute value of the ratio of the second focal length to the first focal length being greater than or equal to... 5; the third lens L3 has positive optical power, the focal length of the third lens L3 is the third focal length, the ratio of the third focal length to the first focal length is greater than or equal to 1.2 and less than or equal to 2.0; the fourth lens L4 has positive optical power, the focal length of the fourth lens L4 is the fourth focal length, the fourth focal length is greater than the third focal length; the correction lens group 111 is used to correct the aberrations generated by the first lens L1, the second lens L2, the third lens L3 and the fourth lens L4; wherein, the total length of the lens 11 from the object side to the image side is less than or equal to 2 times the half-image height.

[0043] The camera 1 provided in this application includes a lens 11 and a photosensitive component 12. The photosensitive component 12 is located on the image side of the lens 11. Light passes through the lens 11 and illuminates the photosensitive component 12 to form an image. The focal length of the lens 11 is a first focal length.

[0044] The lens 11 includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a correction lens group 111. The correction lens group 111 is mainly used to correct the aberrations generated after light is refracted by the first lens L1, the second lens L2, the third lens L3, and the fourth lens L4.

[0045] The first lens L1 has negative optical power, which allows it to receive light at a wide angle and change the direction of edge light, thus reducing distortion.

[0046] The second lens L2 has optical power, and its focal length is the second focal length. The absolute value of the ratio of the second focal length to the first focal length is greater than or equal to 5, meaning that the second lens L2 has a lower degree of refraction. The second lens L2 mainly serves as a light transition, allowing light to propagate better to the third lens L3. The optical angle of the second lens L2 can be set to positive optical power or negative optical angle as needed.

[0047] The third lens L3 has positive optical power. The focal length of the third lens L3 is the third focal length. The ratio of the third focal length to the first focal length is greater than or equal to 1.2 and less than or equal to 2.0. That is, the third lens L3 has a large degree of refraction, thereby converging the light and undertaking the main optical power of the camera 1.

[0048] The fourth lens L4 has positive optical power and its focal length is the fourth focal length, which is greater than the third focal length. The fourth lens L4 mainly serves as a light transition, stabilizing the optical path so that the light can propagate better to the correction lens group 111. Then, the correction lens group 111 can correct aberrations and improve the image quality.

[0049] Furthermore, the total length of the lens 11 from the object side to the image side is less than or equal to twice the half-image height. Through the cooperation of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4 and the correction lens group 111, the size of the lens 11 is reduced. Moreover, the total length of the lens 11 from the object side to the image side is less than or equal to twice the half-image height, which helps to increase the target surface size of the photosensitive component 12. This allows the camera 1 to have a large target surface size while maintaining a small size, thereby improving the imaging effect of the camera 1.

[0050] like Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figure 11 and Figure 12 As shown, according to some embodiments of this application, the camera 1 further has at least one of the following: the object side of the first lens L1 is concave, and the image side of the first lens L1 is concave; the object side of the second lens L2 is convex, and the image side of the second lens L2 is concave; the object side of the third lens L3 is convex, and the image side of the third lens L3 is convex.

[0051] Specifically, the object side of the first lens L1 is concave, and the image side of the first lens L1 is also concave, making it more suitable for the wide-angle lens 11 and more conducive to the convergence of high-magnitude light rays, achieving a light path that first diverges and then converges. Of course, in other embodiments of this application, the image side of the first lens L1 can also be convex.

[0052] The object side of the second lens L2 is convex, and the image side is concave, which allows light to transition smoothly and can correct aberrations to a certain extent.

[0053] The object side of the third lens L3 is convex, and the image side of the third lens L3 is also convex, thus efficiently handling optical power and converging light to the maximum extent.

[0054] According to some embodiments of this application, the camera 1 also has at least one of the following: the refractive index of the third lens L3 is less than 1.6; the Abbe number of the third lens L3 is greater than or equal to 50.

[0055] Specifically, the refractive index of the third lens L3 is less than 1.6, and the Abbe number of the third lens L3 is greater than or equal to 50. By setting a low refractive index and a high Abbe number, the dispersion of the third lens L3 is reduced, thereby reducing the chromatic aberration in the image formed by the camera 1.

[0056] According to some embodiments of this application, the camera 1 also has at least one of the following: the half-image height of the camera 1 is greater than or equal to 5mm; the half-field angle of view of the camera 1 is greater than or equal to 50°; and the aperture of the camera 1 is less than or equal to 1.6.

[0057] Specifically, by improving the lens, the half-image height of camera 1 is greater than or equal to 5mm, and the half-field angle of view of camera 1 is greater than or equal to 50°, which greatly improves the half-image height and half-field angle of view of camera 1. In addition, the aperture of camera 1 is greater than or equal to 1.6, which increases the amount of light entering camera 1 and improves the shooting quality of camera 1.

[0058] The camera 1 provided in this application embodiment has a large light intake and can achieve a large aperture of f / 1.7, which significantly improves the low-light shooting experience.

[0059] like Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figure 11 and Figure 12 As shown, according to some embodiments of this application, the correction lens group 111 includes, from the object side to the image side, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8; the fifth lens L5 has negative optical power; the sixth lens L6 has positive optical power; the seventh lens L7 has optical power; and the eighth lens L8 has optical power.

[0060] Specifically, the correction lens group 111 includes, from the object side to the image side, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8.

[0061] The fifth lens L5 has negative optical power, and the sixth lens L6 has positive optical power. Thus, the fifth lens L5 makes the optical path smoother, and the sixth lens L6 trims the optical path, making the edge optical path clearer and reducing vignetting and distortion.

[0062] The seventh lens L7 and the eighth lens L8 each have optical power, thereby improving the optical path and allowing light to illuminate the photosensitive element 12 as perpendicularly as possible, thus improving off-axis aberration and transverse chromatic aberration. The seventh lens L7 and the eighth lens L8 can have one with positive optical power and the other with negative optical power, or both can have positive optical power, or both can have negative optical power.

[0063] The ultra-wide-angle camera 1 provided in this application embodiment has 8 lenses and is small in size.

[0064] like Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figure 11 and Figure 12 As shown, according to some embodiments of this application, the camera 1 further has at least one of the following: the object side of the fifth lens L5 is concave, and the image side of the fifth lens L5 is concave; the object side of the sixth lens L6 is concave, and the image side of the sixth lens L6 is convex; the object side of the seventh lens L7 is convex; the image side of the seventh lens L7 is concave; the object side of the eighth lens L8 is convex; and the image side of the eighth lens L8 is concave.

[0065] Specifically, the object side of the fifth lens L5 is concave, and the image side of the fifth lens L5 is also concave. This lengthens the distance between the fourth lens L4 and the fifth lens L5, allowing light to travel a longer distance after leaving the fourth lens L4, thereby optimizing the optical path and reducing interference between light beams. Of course, in other embodiments of this application, the image side of the fifth lens L5 may also be convex.

[0066] The object side of the sixth lens L6 is concave, and the image side is convex, thereby converging the light path and improving edge image quality. Of course, in other embodiments of this application, the object side of the fifth lens L5 may also be convex.

[0067] The object side of the seventh lens L7 is convex, and the image side of the seventh lens L7 is concave, which is responsible for correcting off-axis aberrations.

[0068] The object side of the eighth lens L8 is convex, and the image side of the eighth lens L8 is concave. This allows the incident angle of the principal ray to match that of the photosensitive component 12. The convexity of the object side of the eighth lens L8 allows for adjustment of the optical path height, and the concaveness of the image side allows for adjustment of the optical path angle.

[0069] According to some embodiments of this application, the focal length of the fifth lens L5 is the fifth focal length, the focal length of the sixth lens L6 is the sixth focal length, and the sixth focal length is less than the absolute value of the fifth focal length.

[0070] Specifically, the focal length of the fifth lens L5 is the fifth focal length, and the focal length of the sixth lens L6 is the sixth focal length. The sixth focal length is less than the absolute value of the fifth focal length, which makes the optical power of the sixth lens L6 weaker than that of the fifth lens L5. This achieves the effect of weak negative optical power and strong positive optical power, thereby realizing vertical chromatic aberration correction.

[0071] The focal length is the reciprocal of the optical power. Therefore, the absolute value of the sixth focal length being less than that of the fifth focal length indicates that the optical power of the sixth lens L6 is greater than that of the fifth lens L5.

[0072] like Figure 11 and Figure 12As shown, according to some embodiments of this application, the camera 1 further includes an aperture stop 13, which is disposed between any two adjacent lenses among the second lens L2, the third lens L3, and the fourth lens L4.

[0073] Specifically, the camera 1 also includes an aperture stop 13, which is positioned between the second lens L2 and the third lens L3, or between the third lens L3 and the fourth lens L4, thereby reducing the influence of the aperture stop 13 on the large-angle light refracted by the first lens L1, increasing the amount of light entering, making it more suitable for the wide-angle camera 1, and better compatible with wide-angle and large image height.

[0074] like Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figure 11 and Figure 12 As shown, according to some embodiments of this application, the photosensitive component 12 includes: a filter 121 disposed on the image side of the lens 11; and a sensor 122 disposed on the side of the filter 121 away from the lens 11, wherein the target surface size of the sensor 122 is greater than or equal to 16.28 mm.

[0075] Specifically, the photosensitive component 12 includes a filter 121 and a sensor 122. The filter 121 is disposed on the image side of the lens 11, and the sensor 122 is disposed on the side of the filter 121 away from the lens 11. The target surface size of the sensor 122 is greater than or equal to 16.28 mm, thereby increasing the target surface size of the sensor 122 and improving the imaging effect of the camera 1.

[0076] 16.28 millimeters can be understood as 1 / 1.56 inches.

[0077] The camera 1 provided in this application embodiment can be adapted to a sensor 122 with a large target surface such as 1 / 1.28 inch, thereby improving the resolution of the image. Here, 1 / 1.56 means 1 / 1.56 and 1 / 1.28 means 1 / 1.28.

[0078] From the perspective of optical system architecture, this application provides a small-volume, large-area ultra-wide-angle camera 1, which uses a large-area photosensitive component 12 to improve image quality.

[0079] like Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figure 11 and Figure 12As shown, according to some embodiments of the present application, the object side of the first lens L1 is the first surface S1, the image side of the first lens L1 is the second surface S2, the object side of the second lens L2 is the third surface S3, the image side of the second lens L2 is the fourth surface S4, the object side of the third lens L3 is the fifth surface S5, the image side of the third lens L3 is the sixth surface S6, the object side of the fourth lens L4 is the seventh surface S7, the image side of the fourth lens L4 is the eighth surface S8, the object side of the fifth lens L5 is the ninth surface S9, the image side of the fifth lens L5 is the tenth surface S10, the object side of the sixth lens L6 is the eleventh surface S11, the image side of the sixth lens L6 is the twelfth surface S12, the object side of the seventh lens L7 is the thirteenth surface S13, the image side of the seventh lens L7 is the fourteenth surface S14, the object side of the eighth lens L8 is the fifteenth surface S15, the image side of the eighth lens L8 is the sixteenth surface S16, the object side of the filter 121 is the seventeenth surface S17, the image side of the filter 121 is the eighteenth surface S18, and the target surface of the sensor 122 is the nineteenth surface S19.

[0080] According to some embodiments of the present application, the lens 11 includes 8 lenses with optical power. The camera 1 has characteristics such as a large target surface, ultra-wide angle, large aperture, and small volume. The focal length of the lens 11 is the first focal length efl. Specifically, the lens 11 sequentially includes, along the optical axis from the object side to the image side:

[0081] The first lens L1 with negative optical power, the object side is concave, and its main function is to collect light rays at large angles into the lens 11 and reduce the distortion of imaging.

[0082] The second lens L2 with optical power, the object side is convex, the image side is concave, the focal length is the second focal length f2, and it satisfies the relationship: |f2÷efl|>5.

[0083] The third lens L3 with positive optical power, both the object side and the image side are convex, the focal length is the third focal length f3, and it satisfies the relationship: 1.2<f3÷efl<2.0, the refractive index Nd satisfies Nd<1.6, and the Abbe number Vd satisfies 50<Vd. Its main function is to bear the main optical power of the lens 11 and eliminate chromatic aberration.

[0084] The fourth lens L4 with positive optical power, the focal length is the fourth focal length f4, and it satisfies the relationship f3<f4.

[0085] The fifth lens L5 with negative optical power, the object side is concave, and the focal length is the fifth focal length f5.

[0086] The sixth lens L6 with positive optical power, the image side is convex, the focal length is the sixth focal length f6, and it satisfies f6<|f5|.

[0087] The seventh lens L7 with optical power, the object side is convex, and the image side is concave.

[0088] The eighth lens L8, which has optical power, has a convex object side and a concave image side. The main functions of the seventh lens L7 and the eighth lens L8 are to eliminate the lens's 11-axis off-axis aberrations and transverse chromatic aberration.

[0089] The photosensitive component 12 includes a filter 121 and a sensor 122. The filter 121 may be an infrared cut-off filter, and the sensor 122 is an image sensor.

[0090] The focal length of lens 11 is the first focal length ehl. The half field of view HFOV of camera 1 satisfies the relationship: ehl×tan(HFOV)>5mm, that is, the half image height IH of camera 1>5mm, which is a large target area in the field of electronic devices; HFOV>50°, which is a wide field of view; the aperture Fno of camera 1 satisfies: 1.6≤Fno, which is a large aperture.

[0091] Focal length is a measure of an optical system's ability to focus or disperse light. It refers to the perpendicular distance from the optical center of the lens or lens 11 to the focal plane when a distant object is projected into a sharp image on the focal plane. From a practical perspective, it can be understood as the distance from the center of the lens (lens 11) to the imaging plane.

[0092] Optical power characterizes a lens's ability to refract an incident parallel beam of light.

[0093] The field of view (FOV) is the angle formed by the two edges of the lens 11, with the lens 11 as the vertex, representing the maximum range through which the image of the subject can be captured by the lens 11. The size of the FOV determines the field of view of the lens 11; the larger the FOV, the wider the field of view. The half field of view (HFOV) represents half of the FOV.

[0094] The aperture is a device used to control the amount of light passing through the lens 11 into the electronic device. It is usually expressed in F-number within the lens 11.

[0095] The aperture number F is a relative value derived from the focal length or the light-gathering diameter of lens 11 (the reciprocal of the relative aperture). The smaller the aperture number F, the more light enters in the same unit of time, the shallower the depth of field, and the background content of the photo will be blurred, producing an effect similar to that of telephoto lens 11.

[0096] The side of the object-side lens 11 where the object is located is called the object side, and the side of the lens facing the object side is called the object side surface of the lens.

[0097] The side of the image of the subject in the image-side lens 11 is called the image side, and the side of the lens facing the image side is called the image-side surface.

[0098] The substrate of the filter 121 is a flat glass, with an AR antireflection film and an IR cut-off film respectively coated on the surface to filter near-infrared light.

[0099] The sensor 122 is the imaging surface, a light receiver, and the object-side light is imaged on the chip after being refracted by the imaging lens 11.

[0100] According to some embodiments of the present application, the designed lens surface type is an even aspheric surface, satisfying the aspheric formula describing the aspheric surface: .

[0101] Among them, c represents the curvature of the optical surface, that is, the reciprocal of the radius of the optical surface; r represents the perpendicular distance from a point on the optical surface to the optical axis; Z represents the sagitta of a point along the optical axis direction; K represents the conic coefficient of the optical surface, and Ai represents the i-th order aspheric coefficient.

[0102] As Figure 2 shown, according to some embodiments of the present application, the lens 11 includes 8 lenses with optical power. The lens 11 includes, in order from the object side to the image side along the optical axis:

[0103] The first lens L1 with negative optical power, the object side is concave, and its main function is to collect large-angle light into the lens 11 and reduce the distortion of imaging.

[0104] The second lens L2 with optical power, the object side is convex, the image side is concave, and the focal length is the second focal length f2, satisfying the relationship: |f2÷efl|>5.

[0105] The third lens L3 with positive optical power, both the object side and the image side are convex, the focal length is the third focal length f3, satisfying the relationship: 1.2<f3÷efl<2.0, the refractive index Nd satisfies Nd<1.6, and the Abbe number Vd satisfies 50<Vd. The main function of the third lens L3 is to bear the main optical power of the lens 11 and eliminate chromatic aberration.

[0106] The fourth lens L4 with positive optical power, the focal length is the fourth focal length f4, satisfying the relationship f3<f4.

[0107] The fifth lens L5 with negative optical power, the object side is concave, and the focal length is the fifth focal length f5.

[0108] The sixth lens L6 with positive optical power, the image side is convex, the focal length is the sixth focal length f6, satisfying f6<|f5|.

[0109] The seventh lens L7 with optical power, the object side is convex, the image side is concave.

[0110] The eighth lens L8 with optical power, the object side is convex, the image side is concave.

[0111] The basic parameters of lens 11 are shown in Table 1 below:

[0112] Table 1

[0113]

[0114] Where efl represents the first focal length of lens 11, F represents the aperture of camera 1, IH represents the half image height, FOV represents the full field of view, and TTL represents the total length of lens 11 from the object side to the image side.

[0115] The parameters of each surface in camera 1 are shown in Table 2 below:

[0116] Table 2

[0117]

[0118] Infinity represents infinity.

[0119] The coefficients of the aspherical higher-order terms on each surface of camera 1 are shown in Table 3 below:

[0120] Table 3

[0121]

[0122] Where K represents the quadratic surface coefficient of the optical surface, and A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 represent the aspherical surface coefficients.

[0123] like Figure 3 As shown, the five solid curves in the color difference diagram represent wavelengths of light of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, and are represented by different colors. It can be seen that the axial color difference of the camera 1 and lens 11 provided in this embodiment is controlled within a very small range, and the color difference convergence is good.

[0124] like Figure 4 As shown in the MTF defocus plot, it can be seen that at a spatial frequency of 100 lp / mm, the MTF of the entire field of view is greater than 0.3, indicating high resolution. Here, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, and F11 represent the field of view; T and R represent the meridional and sagittal directions, respectively; RIH represents the relative image height; and Diff.Limit represents the diffraction limit.

[0125] like Figure 5 As shown, according to some embodiments of this application, lens 11 includes eight lenses with optical power, and lens 11 includes, from the object side to the image side, the following sequentially along the optical axis:

[0126] The first lens L1 with a negative focal power has a concave surface on the object side, and its main function is to collect large-angle light rays into the lens 11 and reduce the distortion of the image.

[0127] The second lens L2 with a focal power has a convex surface on the object side and a concave surface on the image side, and its focal length is the second focal length f2, satisfying the relation: |f2÷efl|>5.

[0128] The third lens L3 with a positive focal power has convex surfaces on both the object side and the image side, and its focal length is the third focal length f3, satisfying the relation: 1.2<f3÷efl<2.0, the refractive index Nd satisfies Nd<1.6, and the Abbe number Vd satisfies 50<Vd. The main function of the third lens L3 is to bear the main focal power of the lens 11 and eliminate chromatic aberration.

[0129] The fourth lens L4 with a positive focal power has a focal length of the fourth focal length f4, satisfying the relation f3<f4.

[0130] The fifth lens L5 with a negative focal power has a concave surface on the object side and a focal length of the fifth focal length f5.

[0131] The sixth lens L6 with a positive focal power has a convex surface on the image side and a focal length of the sixth focal length f6, satisfying f6<|f5|.

[0132] The seventh lens L7 with a focal power has a convex surface on the object side and a concave surface on the image side.

[0133] The eighth lens L8 with a focal power has a convex surface on the object side and a concave surface on the image side.

[0134] The aperture stop is arranged between the third lens L3 and the fourth lens L4.

[0135] Among them, the basic parameters of the lens 11 are shown in Table 4 below:

[0136] Table 4

[0137]

[0138] Among them, efl represents the first focal length of the lens 11, F represents the aperture of the camera 1, IH represents the semi-image height, FOV represents the full field of view angle, and TTL represents the total length of the lens 11 from the object side to the image side.

[0139] The parameters of each surface in the camera 1 are shown in Table 5 below:

[0140] Table 5

[0141]

[0142] Among them, Infinity represents infinity.

[0143] The aspheric high-order term coefficients of each surface in the camera 1 are shown in Table 6 below:

[0144] Table 6

[0145]

[0146] Among them, K represents the conic coefficient of the optical surface, and A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 represent aspheric coefficients.

[0147] As Figure 6 shown, the five solid curves in the chromatic aberration diagram are color lights with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, which are represented by different colors. It can be seen that for the camera 1 provided by the embodiments of the present application, the axial chromatic aberration of the lens 11 is controlled within a very small range, and the chromatic aberration converges well.

[0148] As Figure 7 shown, it can be seen from the MTF defocus diagram that at a spatial frequency of 100 lp / mm, the full-field MTF is greater than 0.3, indicating high resolution. Among them, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, and F11 represent fields of view, T and R respectively represent the meridional direction and the sagittal direction, RIH represents the relative image height, and Diff.Limit represents the diffraction limit.

[0149] As Figure 8 shown, according to some embodiments of the present application, the lens 11 includes 8 lenses with optical power. The lens 11 includes, in order from the object side to the image side along the optical axis:

[0150] The first lens L1 with negative optical power, the object side is concave, and its main function is to collect large-angle light rays into the lens 11 and reduce the distortion of imaging.

[0151] The second lens L2 with optical power, the object side is convex, the image side is concave, and the focal length is the second focal length f2, satisfying the relationship: |f2÷efl|>5.

[0152] The third lens L3 with positive optical power, both the object side and the image side are convex, the focal length is the third focal length f3, satisfying the relationship: 1.2<f3÷efl<2.0, the refractive index Nd satisfies Nd<1.6, and the Abbe number Vd satisfies 50<Vd. The main function of the third lens L3 is to bear the main optical power of the lens 11 and eliminate chromatic aberration.

[0153] The fourth lens L4 with positive optical power, the focal length is the fourth focal length f4, satisfying the relationship f3<f4.

[0154] The fifth lens L5 has negative optical power, a concave object side, and a focal length of the fifth focal length f5.

[0155] A sixth lens L6 with positive optical power has a convex image side and a focal length of the sixth focal length f6, satisfying f6 < |f5|.

[0156] The seventh lens L7 has optical power, with a convex object side and a concave image side.

[0157] The eighth lens L8 has optical power, with a convex object side and a concave image side.

[0158] The aperture is positioned between the second lens L2 and the third lens L3.

[0159] The basic parameters of lens 11 are shown in Table 7 below:

[0160] Table 7

[0161]

[0162] Where efl represents the first focal length of lens 11, F represents the aperture of camera 1, IH represents the half image height, FOV represents the full field of view, and TTL represents the total length of lens 11 from the object side to the image side.

[0163] The parameters of each surface in camera 1 are shown in Table 8 below:

[0164] Table 8

[0165]

[0166] Infinity represents infinity.

[0167] The coefficients of the aspherical higher-order terms on each surface of camera 1 are shown in Table 9 below:

[0168] Table 9

[0169]

[0170] Where K represents the quadratic surface coefficient of the optical surface, and A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 represent the aspherical surface coefficients.

[0171] like Figure 9 As shown, the five solid curves in the color difference diagram represent wavelengths of light of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, and are represented by different colors. It can be seen that the axial color difference of the camera 1 and lens 11 provided in this embodiment is controlled within a very small range, and the color difference convergence is good.

[0172] like Figure 10 As shown in the MTF defocus plot, it can be seen that at a spatial frequency of 100 lp / mm, the MTF of the entire field of view is greater than 0.3, indicating high resolution. Here, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, and F11 represent the field of view; T and R represent the meridional and sagittal directions, respectively; RIH represents the relative image height; and Diff.Limit represents the diffraction limit.

[0173] The sensor 122 in the camera 1 provided in this application embodiment can be adapted to an ultra-large target surface. A sensor 122 with a target surface of 1 / 1.56 inches or larger can be used, which greatly increases the amount of light intake and improves clarity and low-light capability. Furthermore, the small size of the camera 1 achieves a compact small-volume architecture while increasing the target surface size and aperture.

[0174] Secondly, this application provides an electronic device, including: a camera 1 as provided in the first aspect embodiment.

[0175] The electronic device provided in this application includes the camera 1 provided in the first aspect embodiment, and therefore has all the beneficial effects of the camera 1 provided in the first aspect embodiment, which will not be described in detail here.

[0176] The electronic device in this application embodiment can be a terminal, or it can be any other device besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. The embodiments of this application do not specifically limit it.

[0177] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0178] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A camera, characterized in that, include: A lens and a photosensitive component, wherein the photosensitive component is located on the image side of the lens, and the focal length of the lens is a first focal length; The lens, from the object side to the image side, comprises, in sequence: a first lens, a second lens, a third lens, a fourth lens, and a correction lens group; The first lens has negative optical power; The second lens has optical power, the focal length of the second lens is a second focal length, and the absolute value of the ratio of the second focal length to the first focal length is greater than or equal to 5; The third lens has positive optical power, the focal length of the third lens is the third focal length, and the ratio of the third focal length to the first focal length is greater than or equal to 1.2 and less than or equal to 2.

0. The fourth lens has positive optical power, and the focal length of the fourth lens is the fourth focal length, which is greater than the third focal length. The correction lens group is used to correct the aberrations generated by the first lens, the second lens, the third lens, and the fourth lens; Wherein, the total length of the lens from the object side to the image side is less than or equal to twice the half-image height.

2. The camera according to claim 1, characterized in that, The camera also has at least one of the following features: The object side of the first lens is concave, and the image side of the first lens is also concave. The object side of the second lens is convex, and the image side of the second lens is concave. The object side of the third lens is convex, and the image side of the third lens is also convex.

3. The camera according to claim 1, characterized in that, The camera also has at least one of the following features: The refractive index of the third lens is less than 1.6; The Abbe number of the third lens is greater than or equal to 50.

4. The camera according to claim 1, characterized in that, The camera also has at least one of the following features: The half-image height of the camera is greater than or equal to 5mm; The half-field-of-view angle of the camera is greater than or equal to 50°; The aperture of the camera is greater than or equal to 1.

6.

5. The camera according to any one of claims 1 to 4, characterized in that, The corrective lens group includes, from the object side to the image side, the fifth lens, the sixth lens, the seventh lens, and the eighth lens. The fifth lens has negative optical power; The sixth lens has positive optical power; The seventh lens has optical power; The eighth lens has optical power.

6. The camera according to claim 5, characterized in that, The camera also has at least one of the following features: The object side of the fifth lens is concave, and the image side of the fifth lens is concave; the object side of the sixth lens is concave, and the image side of the sixth lens is convex. The object side of the seventh lens is convex, and the image side of the seventh lens is concave. The object side of the eighth lens is convex, and the image side of the eighth lens is concave.

7. The camera according to claim 5, characterized in that, The fifth lens has a focal length of 5, the sixth lens has a focal length of 6, and the sixth focal length is less than the absolute value of the fifth focal length.

8. The camera according to claim 5, characterized in that, The camera also includes: An aperture stop is positioned between any two adjacent lenses among the second lens, the third lens, and the fourth lens.

9. The camera according to any one of claims 1 to 4, characterized in that, The photosensitive component includes: A filter is disposed on the image side of the lens; A sensor is disposed on the side of the filter facing away from the lens, and the target surface size of the sensor is greater than or equal to 16.28 mm.

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

Images