Ultra-wide lens, camera module and electronic device

Abstract

The application discloses an ultra-wide-angle lens, a camera module and an electronic device. The ultra-wide-angle lens comprises, in sequence from an object side to an image side, a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power and a fifth lens with refractive power. The ultra-wide-angle lens satisfies the following relationship: D / 2R2<0.93; wherein D is the effective diameter of the first lens, and R2 is the curvature radius of the image side surface of the first lens. The ultra-wide-angle lens, the camera module and the electronic device of the application achieve the wide-angle effect through the design of the first lens and the reasonable collocation of other lenses, the configuration of the first lens is reasonable, the manufacturing requirements are met, and therefore the yield can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to optical imaging technology, in particular to a super wide-angle lens, a camera module and an electronic device. BACKGROUND

[0002] In order to obtain a larger field of view, the super wide-angle lens is often assembled by multiple lenses, which has a large production and processing difficulty and a low yield. SUMMARY

[0003] The present application provides a super wide-angle lens, a camera module and an electronic device. The super wide-angle lens of the present application comprises, in order from the object side to the image side, a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, and a fifth lens having a refractive power. The super wide-angle lens satisfies the following relationship: D / 2R2<0.93; wherein D is the effective diameter of the first lens, and R2 is the radius of curvature of the image side surface of the first lens.

[0004] The super wide-angle lens of the present application realizes the wide-angle effect through the design of the first lens and the reasonable collocation of other lenses, and the configuration of the first lens is reasonable, which is beneficial to production and processing, meets the manufacturing requirements, and thus can improve the yield.

[0005] In some embodiments, the first lens is a meniscus lens, the object side surface of the first lens is a convex surface, the object side surface and the image side surface of the second lens are both concave surfaces, the image side surface of the third lens is a convex surface, and at least one surface of the fourth lens and the fifth lens is an aspherical surface.

[0006] In this way, the super wide-angle lens can effectively reduce the total length of the super wide-angle lens by adjusting the radius of curvature and the aspherical coefficient of the lens surface, and the use of diversified surface types can effectively correct the aberration of the super wide-angle lens and improve the imaging quality.

[0007] In some embodiments, the super wide-angle lens satisfies the following relationship: f / f1<-0.16; wherein f is the effective focal length of the super wide-angle lens, and f1 is the focal length of the first lens.

[0008] When the above relationship is satisfied, it is beneficial to balance the expansion of the field of view of the super wide-angle lens and the shortening of the total optical length of the super wide-angle lens.

[0009] In some embodiments, the super wide-angle lens further comprises a diaphragm, and the super wide-angle lens satisfies the following relationship: SL / TTL>0.34; wherein SL is the distance from the diaphragm to the imaging surface of the super wide-angle lens on the optical axis, and TTL is the distance from the object side surface of the first lens to the imaging surface on the optical axis.

[0010] When the above relationship is satisfied, the exit pupil of the ultra-wide-angle lens is far away from the imaging surface, so that light is incident on the photosensitive element in a manner close to perpendicular incidence, which is a telecentric characteristic on the image side, and the telecentric characteristic is extremely important for the photosensitive capability of the solid-state electronic photosensitive element, can improve the photosensitive sensitivity of the electronic photosensitive element, and reduce the possibility of dark corners of the ultra-wide-angle lens.

[0011] In some embodiments, the ultra-wide-angle lens satisfies the following relationship: 1 / 2H-FOV≥95 degrees; wherein H-FOV is the field of view angle along the horizontal direction of the imaging surface of the ultra-wide-angle lens.

[0012] When the above relationship is satisfied, the ultra-wide-angle lens has a large field of view angle to meet the requirements of electronic products such as mobile phones, cameras, vehicle-mounted lenses, monitoring lenses, medical lenses, etc. for a large field of view angle.

[0013] In some embodiments, the ultra-wide-angle lens satisfies the following relationship: f / f12<-0.5; wherein f is the effective focal length of the ultra-wide-angle lens, and f12 is the combined focal length of the first lens and the second lens.

[0014] When the above relationship is satisfied, the first lens and the second lens can effectively share the negative refractive power of the lens group, avoid the refractive power configuration of the third lens, the fourth lens, and the fifth lens being too large, and reduce the influence of sensitivity, manufacturing tolerance, and environmental factors on the ultra-wide-angle lens.

[0015] In some embodiments, the ultra-wide-angle lens satisfies the following relationship: -1<f / f3-f / f4<1; wherein f is the effective focal length of the ultra-wide-angle lens, f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens.

[0016] When the above relationship is satisfied, the refractive power of the third lens and the fourth lens is reasonable, which can effectively control the sensitivity of the ultra-wide-angle lens to errors and correct aberrations. At the same time, it can avoid the negative refractive power of the third lens being too small and the positive refractive power of the fourth lens being too large, thereby preventing the influence of thermal expansion and contraction caused by changes in environmental temperature on the lens, and finally ensuring the imaging clarity of the ultra-wide-angle lens within a temperature range of -40°C to +85°C.

[0017] In some embodiments, the ultra-wide-angle lens satisfies the following relationship: -3<R6 / R7<0; wherein R6 is the curvature radius of the image side surface of the third lens, and R7 is the curvature radius of the object side surface of the fourth lens.

[0018] When the above relationship is satisfied, it is beneficial for the fourth lens to correct aberrations from the third lens and the ultra-wide-angle lens, and to adjust appropriate refractive power to improve the resolving power of the ultra-wide-angle lens.

[0019] In some embodiments, the ultra-wide-angle lens satisfies the following relationship: CT4 / CT5<4; wherein CT4 is the thickness of the fourth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis.

[0020] When the above relationship is satisfied, the thicknesses of the fourth lens and the fifth lens are reasonable, which can help to configure the assembly space of the ultra-wide-angle lens.

[0021] The camera module of the embodiments of the present application comprises the ultra-wide-angle lens of any of the above embodiments and a photosensitive element, wherein the photosensitive element is arranged on the image side of the ultra-wide-angle lens.

[0022] The electronic device of the embodiments of the present application comprises a housing and the camera module of the above embodiments, wherein the camera module is mounted on the housing for acquiring images.

[0023] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application can become apparent and be easily understood from the description of the embodiments, given together with the accompanying drawings, in which:

[0025] Figure 1 is a structural schematic diagram of an infrared lens of a first embodiment of the present application;

[0026] Figures 2 to 4 are respectively a longitudinal aberration diagram (mm), a field curvature diagram (mm) and a distortion diagram (%) of the infrared lens in the first embodiment;

[0027] Figure 5 is a structural schematic diagram of an infrared lens of a second embodiment of the present application;

[0028] Figures 6 to 8 are respectively a longitudinal aberration diagram (mm), a field curvature diagram (mm) and a distortion diagram (%) of the infrared lens in the second embodiment;

[0029] Figure 9 is a structural schematic diagram of an infrared lens of a third embodiment of the present application;

[0030] Figures 10 to 12 are respectively a longitudinal aberration diagram (mm), a field curvature diagram (mm) and a distortion diagram (%) of the infrared lens in the third embodiment;

[0031] Figure 13 is a structural schematic diagram of an infrared lens of a fourth embodiment of the present application;

[0032] Figures 14 to 16are longitudinal aberration graph (mm), field curvature graph (mm) and distortion graph (%) of the infrared lens in the fourth embodiment, respectively;

[0033] Figure 17 is a structural schematic diagram of the infrared lens of the fifth embodiment of the present application;

[0034] Figures 18 to 20 are longitudinal aberration graph (mm), field curvature graph (mm) and distortion graph (%) of the infrared lens in the fifth embodiment, respectively;

[0035] Figure 21 is a structural schematic diagram of the infrared lens of the sixth embodiment of the present application;

[0036] Figures 22 to 24 are longitudinal aberration graph (mm), field curvature graph (mm) and distortion graph (%) of the infrared lens in the sixth embodiment, respectively;

[0037] Figure 25 is a structural schematic diagram of the infrared lens of the seventh embodiment of the present application;

[0038] Figures 26 to 28 are longitudinal aberration graph (mm), field curvature graph (mm) and distortion graph (%) of the infrared lens in the seventh embodiment, respectively;

[0039] Figure 29 is a structural schematic diagram of the infrared lens of the eighth embodiment of the present application;

[0040] Figures 30 to 32 are longitudinal aberration graph (mm), field curvature graph (mm) and distortion graph (%) of the infrared lens in the first embodiment, respectively;

[0041] Figure 33 is a structural schematic diagram of the camera module of the embodiment of the present application;

[0042] Figure 34 is a structural schematic diagram of the electronic device of the embodiment of the present application; and

[0043] Figure 35 is a structural schematic diagram of the electronic device of another embodiment of the present application. DETAILED DESCRIPTION

[0044] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout the drawings denote the same or similar elements or elements having the same or similar functions. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0045] In the description of this invention, 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," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly 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, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The disclosure that follows provides many different embodiments, or examples, for implementing different structures of the application. For the purpose of simplicity, the elements and settings of the various examples are described in the following detailed description with reference made to the drawings. Of course, those skilled in the art will recognize that changes can be made in the elements and settings described, which changes are "equivalents" within the scope and spirit of the application. In addition, the application provides examples of various specific processes and materials, but those skilled in the art will recognize that other processes and / or other materials can be used.

[0049] See also Figure 1 , Figure 5 , Figure 9 , Figure 13 , Figure 17 , Figure 21 , Figure 25 and Figure 29 , the ultra-wide-angle lens 10 of the embodiment of the present application sequentially includes, from the object side to the image side, a first lens L1 having a negative refractive power, a second lens L2 having a negative refractive power, a third lens L3 having a positive refractive power, a fourth lens L4 having a positive refractive power, and a fifth lens L5 having a refractive power.

[0050] The first lens L1 has an object side surface S1 and an image side surface S2, the second lens L2 has an object side surface S3 and an image side surface S4, the third lens L3 has an object side surface S5 and an image side surface S6, the fourth lens L4 has an object side surface S7 and an image side surface S8, and the fifth lens L5 has an object side surface S9 and an image side surface S10. The first lens L1 is a meniscus lens, and the object side surface S1 of the first lens L1 is a convex surface. The object side surface S3 and the image side surface S4 of the second lens L2 are both concave surfaces. The image side surface S5 of the third lens L3 is a convex surface. The ultra-wide-angle lens 10 satisfies the following relationship: D / 2R2≤0.93; where D is the effective diameter of the first lens L1, and R2 is the radius of curvature of the image side surface S2 of the first lens L1. That is, D / 2R2 can be any value less than or equal to 0.93, for example, the value can be 0.1, 0.15, 0.25, 0.3, 0.45, 0.5, 0.55, 0.62, 0.72, 0.84, 0.9, 0.91, 0.92, 0.93, etc. Preferably, D / 2R2<0.93, and D / 2R2 can be any value less than 0.93, for example, the value can be 0.1, 0.15, 0.25, 0.3, 0.45, 0.5, 0.55, 0.62, 0.72, 0.84, 0.9, 0.91, 0.92, etc.

[0051] When the ultra-wide-angle lens 10 is used for imaging, the light emitted or reflected by the object OBJ enters the ultra-wide-angle lens 10 from the object side and passes through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared filter L6 having the object side S11 and the image side S12 in sequence, and finally converges on the imaging surface S13. In other embodiments, the light passes through the infrared filter L6 and then passes through the protective glass L7 having the object side S14 and the image side S15, and finally converges on the imaging surface S13.

[0052] The ultra-wide-angle lens 10 of the embodiments of the present application achieves the wide-angle effect through the design of the first lens L1 and the reasonable collocation of other lenses, and the configuration of the first lens L1 is reasonable, which meets the manufacturing requirements, thereby improving the yield.

[0053] In some embodiments, the ultra-wide-angle lens 10 further includes a stop STO. The stop STO can be an aperture stop or a field stop. The embodiments of the present application are described by taking the stop STO as an aperture stop. The stop STO can be arranged on the surface of any one lens, or arranged before the first lens L1, or arranged between any two lenses, or arranged between the fifth lens L5 and the infrared filter L6. For example, in the first embodiment to the eighth embodiment, the stop STO is arranged between the third lens L3 and the fourth lens L4.

[0054] In some embodiments, the ultra-wide-angle lens 10 satisfies the following relationship: f / f1≤-0.16; wherein f1 is the focal length of the first lens L1. That is, f / f1 can be any value less than or equal to -0.16, for example, the value can be -30, -25, -10, -9, -8, -7, -0.17, -0.16, etc. Preferably, f / f1<-0.16, that is, f / f1 can be any value less than -0.16, for example, the value can be -30, -25, -10, -9, -8, -0.25, -0.21, -0.19, -0.17, etc.

[0055] When the above relationship is satisfied, it is beneficial to balance the expansion of the field angle of the ultra-wide-angle lens 10 and the shortening of the total optical length of the ultra-wide-angle lens 10.

[0056] In some embodiments, the ultra-wide-angle lens 10 satisfies the following relationship: SL / TTL≥0.34; where SL is the distance on the optical axis from the stop STO to the imaging surface S13 (i.e., the photosensitive element 20) of the ultra-wide-angle lens 10, and TTL is the distance on the optical axis from the object side surface S1 of the first lens L1 to the imaging surface S13. That is, SL / TTL can be any value greater than or equal to 0.34, for example, the value can be 0.34, 0.35, 0.36, 0.37, 0.52, 0.65, 0.7, 0.85, 0.9, 1, 2, 4, 7, 10, etc. Preferably, SL / TTL>0.34, that is, SL / TTL can be any value greater than 0.34, for example, the value can be 0.35, 0.42, 0.43, 0.52, 0.65, 0.7, 4, 7, 10, etc.

[0057] When the above relationship is satisfied, the exit pupil of the ultra-wide-angle lens 10 is far away from the imaging surface, so that light will be incident on the photosensitive element 20 in a nearly perpendicular manner, which is a telecentric characteristic on the image side. The telecentric characteristic is extremely important for the photosensitive capability of the solid-state electronic photosensitive element, and can improve the photosensitive sensitivity of the electronic photosensitive element and reduce the possibility of dark corners of the ultra-wide-angle lens 10.

[0058] In some embodiments, the ultra-wide-angle lens 10 satisfies the following relationship: 1 / 2H-FOV≥92.5 degrees; where H-FOV is the field of view angle in the horizontal direction of the imaging surface of the ultra-wide-angle lens 10. That is, 1 / 2H-FOV can be any angle greater than or equal to 92.5 degrees, for example, the value can be 92.5 degrees, 93 degrees, 93.5 degrees, 94 degrees, 95 degrees, 96 degrees, 97 degrees, 97.5 degrees, 98 degrees, 98.5 degrees, 99 degrees, etc. Preferably, 1 / 2H-FOV≥95 degrees, that is, 1 / 2H-FOV can be any angle greater than or equal to 95 degrees, for example, the value can be 95 degrees, 96 degrees, 97 degrees, 97.5 degrees, 98 degrees, 98.5 degrees, 99 degrees, etc.

[0059] When the above relationship is satisfied, the ultra-wide-angle lens 10 has a large field of view angle to meet the requirements of electronic products such as mobile phones, cameras, vehicle-mounted lenses, monitoring lenses, medical lenses, etc. for a large field of view angle.

[0060] In some embodiments, the ultra-wide-angle lens 10 satisfies the following relationship: f / f12<-0.5; where f12 is the combined focal length of the first lens L1 and the second lens L2. That is, f / f12 can be any value less than -0.5, for example, the value can be -30, -25, -0.58, -0.56, -0.55, -0.53, -0.51, etc.

[0061] When the above relationship is satisfied, the first lens L1 and the second lens L2 can effectively share the negative refractive power of the ultra-wide-angle lens 10, avoiding the third lens L3, the fourth lens L4, and the fifth lens L5 having too large refractive power, so as to reduce the sensitivity, manufacturing tolerance, and environmental factors of the ultra-wide-angle lens 10.

[0062] In some embodiments, the ultra-wide-angle lens 10 satisfies the following relationship: -1 < f / f3-f / f4 < 1; where f is the effective focal length of the ultra-wide-angle lens 10, f3 is the focal length of the third lens L3, and f4 is the focal length of the fourth lens L4. That is, f / f3-f / f4 can be any value between the interval (-1, 1), for example, the value can be -0.98, -0.95, -0.9, -0.8, -0.6, -0.5, -0.45, -0.4, 0.5, 0.55, 0.6, 0.7, 0.8, 0.9, 0.95, and the like.

[0063] When the above relationship is satisfied, the refractive power of the third lens L3 and the fourth lens L4 is reasonable, which can effectively control the sensitivity of the ultra-wide-angle lens 10 to errors and correct aberrations. At the same time, it can avoid the negative refractive power of the third lens L3 being too small and the positive refractive power of the fourth lens L4 being too large, thereby preventing the influence of thermal expansion and contraction caused by changes in environmental temperature on the lens, and finally ensuring the imaging clarity of the ultra-wide-angle lens 10 within the temperature range of -40°C to +85°C.

[0064] In some embodiments, the ultra-wide-angle lens 10 satisfies the following relationship: -3 < R6 / R7 < 0; where R6 is the curvature radius of the image side S6 of the third lens L3, and R7 is the curvature radius of the object side S7 of the fourth lens S4. That is, R6 / R7 can be any value between the interval (-3, 0), for example, the value can be -2.8, -2.5, -2.13, -2.03, -2, -1.98, -1.8, -0.65, -0.5, -0.2, -0.05, and the like.

[0065] When the above relationship is satisfied, it is beneficial for the fourth lens L4 to correct aberrations from the third lens L3 and the ultra-wide-angle lens 10, and to adjust the appropriate refractive power, so as to improve the resolving power of the ultra-wide-angle lens 10.

[0066] In some embodiments, the ultra-wide-angle lens 10 satisfies the following relationship: CT4 / CT5 < 4; where CT4 is the thickness of the fourth lens L4 on the optical axis, and CT5 is the thickness of the fifth lens L5 on the optical axis. That is, CT4 / CT5 can be any value less than 4, for example, the value can be 0.1, 0.3, 0.5, 3.5, 3.8, 3.9, and the like.

[0067] When the above relationship is satisfied, the thicknesses of the fourth lens L4 and the fifth lens L5 are reasonable, which can help to arrange the assembly space of the ultra-wide-angle lens 10.

[0068] In some embodiments, the ultra-wide-angle lens 10 satisfies the following relationship: FNO≤2.25; wherein FNO is the F-number (aperture value). That is, the FNO can be any value less than or equal to 2.25, for example, the value can be 0.1, 0.3, 0.5, 0.8, 1, 2.15, 2.22, 2.24, 2.25, etc. Preferably, FNO<2.25, that is, the FNO can be any value less than 2.25, for example, the value can be 0.1, 0.3, 0.5, 1.8, 2, 2.1, 2.2, 2.24, etc.

[0069] In this way, the ultra-wide-angle lens 10 has a larger aperture value and a larger amount of light.

[0070] In some embodiments, the material of the first lens L1 is glass, and the materials of the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are plastic.

[0071] Through the reasonable collocation of the materials of the first lens L1 to the fifth lens L5, the ultra-wide-angle lens 10 can achieve ultra-thin while effectively eliminating aberration and meeting the demand of high pixel, and the cost is relatively low.

[0072] In some embodiments, at least one surface of the fourth lens L4 and the fifth lens L5 in the ultra-wide-angle lens 10 is aspherical. For example, in the first embodiment, the object side surface and the image side surface of the fourth lens L4 and the fifth lens L5 are aspherical.

[0073] In some embodiments, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all aspherical lenses. The surface type of the aspherical surface is determined by the following formula: wherein Z is the longitudinal distance of any point on the aspherical surface from the vertex of the surface, r is the distance from the optical axis to any point on the aspherical surface, c is the vertex curvature (the reciprocal of the radius of curvature), k is the conic constant, and Ai is the correction coefficient of the i-th order of the aspherical surface.

[0074] In this way, the ultra-wide-angle lens 10 can effectively reduce the total length of the ultra-wide-angle lens 10 by adjusting the radius of curvature and the aspherical coefficient of each lens surface, and can effectively correct the aberration of the ultra-wide-angle lens 10 and improve the imaging quality. In addition, the use of diversified surface types can effectively correct the aberration of the ultra-wide-angle lens 10 and improve the imaging quality.

[0075] First embodiment

[0076] Please refer to Figures 1 to 4The first embodiment of the super wide-angle lens 10 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, a fifth lens L5, and an infrared filter L6.

[0077] The first lens L1 has a negative refractive power and is made of glass. The object side surface S1 is a convex surface, and the image side surface S2 is a concave surface, and both are spherical surfaces. The second lens L2 has a negative refractive power and is made of plastic. The object side surface S3 is a concave surface, and the image side surface S4 is a concave surface, and both are aspherical surfaces. The third lens L3 has a positive refractive power and is made of plastic. The object side surface S5 is a convex surface at the optical axis and is a flat surface at the periphery, and the image side surface S6 is a convex surface, and both are aspherical surfaces. The fourth lens L4 has a positive refractive power and is made of plastic. The object side surface S7 is a convex surface, and the image side surface S8 is a convex surface at the optical axis and is a concave surface at the periphery, and both are aspherical surfaces. The fifth lens L5 has a positive refractive power and is made of plastic. The object side surface S9 is a concave surface, and the image side surface S10 is a convex surface, and both are aspherical surfaces.

[0078] The diaphragm STO is disposed between the third lens L3 and the fourth lens L4. The super wide-angle lens 10 has an F number FNO = 2.25.

[0079] The infrared filter L6 is made of glass and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the super wide-angle lens 10.

[0080] In the first embodiment, the effective focal length of the super wide-angle lens 10 is f = 0.99, the F number of the super wide-angle lens 10 is FNO = 2.25, and the horizontal field of view H-FOV = 190 degrees in the horizontal direction of the imaging surface S13 of the super wide-angle lens 10. The super wide-angle lens 10 satisfies the following conditions: D / 2R2 = 0.93; f / f1 = -0.17; SL / TTL = 0.34; f / f12 = -071; f / f3-f / f4 = 0.11; R6 / R7 = -0.65; CT4 / CT5 = 0.7.

[0081] The super wide-angle lens 10 satisfies the conditions of the following table:

[0082] Table 1

[0083]

[0084]

[0085] Table 2

[0086]

[0087] Second Embodiment

[0088] See Figures 5 to 8In the ultra-wide-angle lens 10 of the second embodiment, from the object side to the image side, it includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an infrared filter L6.

[0089] The first lens L1 has negative refractive power and is made of glass. Its object-side surface S1 is convex, and its image-side surface S2 is concave; both are spherical. The second lens L2 has negative refractive power and is made of plastic. Its object-side surface S3 is concave, and its image-side surface S4 is concave; both are aspherical. The third lens L3 has positive refractive power and is made of plastic. Its object-side surface S5 is concave, and its image-side surface S6 is convex; both are aspherical. The fourth lens L4 has positive refractive power and is made of plastic. Its object-side surface S7 is convex, and its image-side surface S8 is convex; both are aspherical. The fifth lens L5 has negative refractive power and is made of plastic. Its object-side surface S9 is concave, and its image-side surface S10 is convex; both are aspherical.

[0090] The aperture stop STO is set between the third lens L3 and the fourth lens L4. The aperture number of the ultra-wide-angle lens 10 is FNO = 2.1.

[0091] The infrared filter L6 is made of glass and is positioned between the fifth lens L5 and the imaging plane S13 without affecting the focal length of the ultra-wide-angle lens 10. The ultra-wide-angle lens 10 meets the conditions in the table below:

[0092] Table 3

[0093]

[0094]

[0095] Table 4

[0096]

[0097] Based on Tables 3 and 4, the following data can be obtained:

[0098] f (mm) 1 SL / TTL 0.34 FNO 2.1 f / f12 -0.62 H-FOV (degrees) 190 f / f3-f / f4 -0.38 [D / 2R2] 0.92 [R6 / R7] -1.61 f / f1 -0.19 CT4 / CT5 2.06

[0099] Third Implementation Method

[0100] Please see Figures 9 to 12 In the ultra-wide-angle lens 10 of the third embodiment, from the object side to the image side, it includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an infrared filter L6.

[0101] The first lens L1 has a negative refractive power, is made of glass, has a convex object side surface S1 and a concave image side surface S2, and both surfaces are spherical. The second lens L2 has a negative refractive power, is made of plastic, has a concave object side surface S3 and a concave image side surface S4, and both surfaces are aspherical. The third lens L3 has a positive refractive power, is made of plastic, has a concave object side surface S5 and a convex image side surface S6, and both surfaces are aspherical. The fourth lens L4 has a positive refractive power, is made of plastic, has a convex object side surface S7 and a convex image side surface S8, and both surfaces are aspherical. The fifth lens L5 has a negative refractive power, is made of plastic, has a concave object side surface S9 and a convex image side surface S10, and both surfaces are aspherical.

[0102] The diaphragm STO is disposed between the third lens L3 and the fourth lens L4. The super wide-angle lens 10 has an F number FNO = 2.05.

[0103] The infrared filter L6 is made of glass, is disposed between the fifth lens L5 and the image plane S13, and does not affect the focal length of the super wide-angle lens 10. The super wide-angle lens 10 satisfies the conditions in the following table:

[0104] Table 5

[0105]

[0106] Table 6

[0107]

[0108]

[0109] According to Table 5 and Table 6, the following data can be obtained:

[0110] f (mm) 0.98 SL / TTL 0.37 FNO 2.05 f / f12 -0.67 H-FOV (degrees) 190 f / f3-f / f4 -0.4 [D / 2R2] 0.92 [R6 / R7] -1.46 f / f1 -0.17 CT4 / CT5 1.39

[0111] Fourth Embodiment

[0112] Please refer to Figures 13 to 16 , the super wide-angle lens 10 of the fourth embodiment includes, from the object side to the image side, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared filter L6.

[0113] The first lens L1 has a negative refractive power and is made of glass. Its object side surface S1 is convex, and its image side surface S2 is concave, both of which are spherical surfaces. The second lens L2 has a negative refractive power and is made of plastic. Its object side surface S3 is concave, and its image side surface S4 is concave, both of which are aspherical surfaces. The third lens L3 has a positive refractive power and is made of plastic. Its object side surface S5 is convex, and its image side surface S6 is convex, both of which are aspherical surfaces. The fourth lens L4 has a positive refractive power and is made of plastic. Its object side surface S7 is convex, and its image side surface S8 is convex, both of which are aspherical surfaces. The fifth lens L5 has a negative refractive power and is made of plastic. Its object side surface S9 is concave, and its image side surface S10 is convex, both of which are aspherical surfaces.

[0114] The diaphragm STO is disposed between the third lens L3 and the fourth lens L4. The F-number FNO of the super wide-angle lens 10 is 2.2.

[0115] The infrared filter L6 is made of glass and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the super wide-angle lens 10. The super wide-angle lens 10 satisfies the conditions in the following table:

[0116] Table 7

[0117]

[0118] Table 8

[0119]

[0120] The following data can be obtained according to Table 7 and Table 8:

[0121] f (mm) 0.98 SL / TTL 0.37 FNO 2.2 f / f12 -0.67 H-FOV (degrees) 190 f / f3-f / f4 -0.37 [D / 2R2] 0.92 [R6 / R7] -2.03 f / f1 -0.16 CT4 / CT5 3.25

[0122] Fifth Embodiment

[0123] Referring to Figures 17 to 20 In the super wide-angle lens 10 of the fifth embodiment, from the object side to the image side, there are the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared filter L6.

[0124] The first lens L1 has a negative refractive power and is made of glass. Its object side surface S1 is convex, and its image side surface S2 is concave, both of which are spherical surfaces. The second lens L2 has a negative refractive power and is made of plastic. Its object side surface S3 is concave, and its image side surface S4 is concave, both of which are aspherical surfaces. The third lens L3 has a positive refractive power and is made of plastic. Its object side surface S5 is convex, and its image side surface S6 is convex, both of which are aspherical surfaces. The fourth lens L4 has a positive refractive power and is made of plastic. Its object side surface S7 is convex, and its image side surface S8 is convex, both of which are aspherical surfaces. The fifth lens L5 has a negative refractive power and is made of plastic. Its object side surface S9 is concave, and its image side surface S10 is convex, both of which are aspherical surfaces.

[0125] The stop STO is disposed between the third lens L3 and the fourth lens L4. The F-number FNO of the super wide-angle lens 10 is 2.1.

[0126] The infrared filter L6 is made of glass and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the super wide-angle lens 10. The super wide-angle lens 10 satisfies the following table:

[0127] Table 9

[0128]

[0129] Table 10

[0130]

[0131] From the tables 9 and 10, the following data can be obtained:

[0132] f (mm) 0.98 SL / TTL 0.35 FNO 2.1 f / f12 -0.59 H-FOV (degrees) 190 f / f3-f / f4 -0.35 [D / 2R2] 0.92 [R6 / R7] -2.13 f / f1 -0.16 CT4 / CT5 2.83

[0133] Sixth Embodiment

[0134] Referring to Figures 21 to 24 In the super wide-angle lens 10 of the sixth embodiment, from the object side to the image side, there are the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the infrared filter L6.

[0135] The first lens L1 has a negative refractive power and is made of glass. The object side surface S1 is a convex surface, and the image side surface S2 is a concave surface, and both are spherical surfaces. The second lens L2 has a negative refractive power and is made of plastic. The object side surface S3 is a concave surface, and the image side surface S4 is a concave surface, and both are aspherical surfaces. The third lens L3 has a positive refractive power and is made of plastic. The object side surface S5 is a concave surface, and the image side surface S6 is a convex surface, and both are aspherical surfaces. The fourth lens L4 has a positive refractive power and is made of plastic. The object side surface S7 is a convex surface, and the image side surface S8 is a convex surface, and both are aspherical surfaces. The fifth lens L5 has a negative refractive power and is made of plastic. The object side surface S9 is a concave surface, and the image side surface S10 is a convex surface, and both are aspherical surfaces.

[0136] The stop STO is disposed between the third lens L3 and the fourth lens L4. The F-number FNO of the super wide-angle lens 10 is 2.1.

[0137] The infrared filter L6 is made of glass and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the super wide-angle lens 10. The super wide-angle lens 10 satisfies the following table:

[0138] Table 11

[0139]

[0140] Table 12

[0141]

[0142]

[0143] According to Table 11 and Table 12, the following data can be obtained:

[0144] f (mm) 0.98 SL / TTL 0.39 FNO 2.1 f / f12 -0.55 H-FOV (degrees) 185 f / f3-f / f4 -0.35 [D / 2R2] 0.8 [R6 / R7] -1.76 f / f1 -0.17 CT4 / CT5 2.48

[0145] Seventh Embodiment

[0146] Referring to Figures 25 to 28 In the seventh embodiment, the super wide-angle lens 10 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, a fifth lens L5, and an infrared filter L6.

[0147] The first lens L1 has a negative refractive power and is made of glass. The object side surface S1 is a convex surface, and the image side surface S2 is a concave surface, and both are spherical surfaces. The second lens L2 has a negative refractive power and is made of plastic. The object side surface S3 is a concave surface, and the image side surface S4 is a concave surface, and both are aspherical surfaces. The third lens L3 has a positive refractive power and is made of plastic. The object side surface S5 is a concave surface, and the image side surface S6 is a convex surface, and both are aspherical surfaces. The fourth lens L4 has a positive refractive power and is made of plastic. The object side surface S7 is a convex surface, and the image side surface S8 is a convex surface, and both are aspherical surfaces. The fifth lens L5 has a negative refractive power and is made of plastic. The object side surface S9 is a concave surface, and the image side surface S10 is a convex surface at the optical axis and is a concave surface at the circumference, and both are aspherical surfaces.

[0148] The stop STO is disposed between the third lens L3 and the fourth lens L4. The F-number FNO of the super wide-angle lens 10 is 2.1.

[0149] The infrared filter L6 is made of glass and is disposed between the fifth lens L5 and the image surface S13 without affecting the focal length of the super wide-angle lens 10. The super wide-angle lens 10 satisfies the following table:

[0150] Table 13

[0151]

[0152]

[0153] Table 14

[0154]

[0155] According to Table 13 and Table 14, the following data can be obtained:

[0156] f (mm) 0.97 SL / TTL 0.35 FNO 2.1 f / f12 -0.55 H-FOV (degrees) 185 f / f3-f / f4 -0.38 [D / 2R2] 0.92 [R6 / R7] -1.98 f / f1 -0.17 CT4 / CT5 1.4

[0157] Eighth embodiment

[0158] Referring to Figures 29 to 32 In the eighth embodiment, the super wide-angle lens 10 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, a fifth lens L5, and an infrared filter L6.

[0159] The first lens L1 has a negative refractive power and is made of glass. The object side surface S1 is a convex surface, and the image side surface S2 is a concave surface, and both are spherical surfaces. The second lens L2 has a negative refractive power and is made of plastic. The object side surface S3 is a concave surface, and the image side surface S4 is a concave surface, and both are aspherical surfaces. The third lens L3 has a positive refractive power and is made of plastic. The object side surface S5 is a concave surface, and the image side surface S6 is a convex surface, and both are aspherical surfaces. The fourth lens L4 has a positive refractive power and is made of plastic. The object side surface S7 is a convex surface, and the image side surface S8 is a convex surface, and both are aspherical surfaces. The fifth lens L5 has a negative refractive power and is made of plastic. The object side surface S9 is a concave surface, and the image side surface S8 is a convex surface, and both are aspherical surfaces.

[0160] The diaphragm STO is disposed between the third lens L3 and the fourth lens L4. The super wide-angle lens 10 has an F number FNO = 2.1.

[0161] The infrared filter L6 is made of glass and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the super wide-angle lens 10.

[0162] The protective glass L7 is made of glass and is disposed between the infrared filter L6 and the imaging surface S13.

[0163] The super wide-angle lens 10 satisfies the following table conditions:

[0164] Table 15

[0165]

[0166] Table 16

[0167]

[0168] According to the data in Tables 15 and 16, the following data can be obtained:

[0169] f (mm) 0.98 SL / TTL 0.36 FNO 2.1 f / f12 -0.56 H-FOV (degrees) 185 f / f3-f / f4 -0.28 [D / 2R2] 0.92 [R6 / R7] -1.25 f / f1 -0.17 CT4 / CT5 2.25

[0170] Referring to Figure 33 The camera module 100 according to the embodiment of the present application includes the super wide-angle lens 10 according to any one of the above embodiments and the photosensitive element 20, and the photosensitive element 20 is disposed on the image side of the super wide-angle lens 10.

[0171] Specifically, the light sensing element 20 can adopt a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor.

[0172] Referring to Figure 34 and Figure 35 , the electronic device 1000 of the embodiments of the present application includes a housing 200 and the camera module 100 of the above embodiments, the camera module 100 is mounted on the housing 200 for acquiring images.

[0173] The camera module 100 is arranged in the housing 200 and exposed from the housing 200 to acquire depth images, the housing 200 can provide the camera module 100 with protection against dust, water, falling, etc., and the housing 200 is provided with a hole corresponding to the camera module 100 to allow light to pass out of or into the housing 200. In other embodiments, the camera module 100 is housed in the housing 200 and can be extended out of the housing 200, at this time, the housing 200 does not need to be provided with a hole corresponding to the light entering direction of the camera module 100. When the camera module 100 needs to be used, the camera module 100 is extended out of the housing 200 to the outside of the housing 200; when the camera module 100 does not need to be used, the camera module 100 is housed in the housing 200 from the outside of the housing 200. In yet another embodiment, the camera module 100 is housed in the housing 200 and located below the display screen, at this time, the housing 200 also does not need to be provided with a hole corresponding to the light entering direction of the camera module 100.

[0174] The electronic device 1000 of the embodiments of the present application includes but is not limited to a car-mounted lens (such as Figure 34 ), a smart phone (such as Figure 35 shown), a mobile phone, a personal digital assistant (PDA), a game console, a personal computer (PC), a camera, a smart watch, etc. information terminal equipment or household appliances with a photographing function, etc.

[0175] In the description of the specification, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0176] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0177] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An ultra-wide-angle lens characterized by comprising: The super-wide-angle lens comprises, in order from the object side to the image side: a first lens having negative refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; and a fifth lens having refractive power, the lens having five pieces of refractive power; wherein the first lens is a meniscus lens, the object side surface of the first lens is convex, the object side surface and the image side surface of the second lens are both concave, the image side surface of the third lens is convex, at least one surface of the fourth lens and the fifth lens is aspherical, the object side surface and the image side surface of the fourth lens are both convex, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is convex; the super-wide-angle lens satisfies the following relationship: 0.8≤D / 2R2<0.93, 2.05≤FNO≤2.25; wherein D is the effective diameter of the first lens, R2 is the radius of curvature of the image side surface of the first lens, and FNO is the F-number.

2. The ultra-wide-angle lens according to claim 1, characterized in that, the super-wide-angle lens satisfies the following relationship: f / f1<-0.16; wherein f is the effective focal length of the super-wide-angle lens, and f1 is the focal length of the first lens.

3. The ultra-wide-angle lens according to claim 1, characterized in that, the super-wide-angle lens further comprises a diaphragm, and the super-wide-angle lens satisfies the following relationship: SL / TTL>0.34; wherein SL is the distance from the diaphragm to the imaging surface of the super-wide-angle lens on the optical axis, and TTL is the distance from the object side surface of the first lens to the imaging surface on the optical axis.

4. The ultra-wide-angle lens according to claim 1, characterized in that, the super-wide-angle lens satisfies the following relationship: 1 / 2H-FOV≥95 degrees; wherein H-FOV is the horizontal field of view angle of the imaging surface of the super-wide-angle lens.

5. The ultra-wide-angle lens according to claim 1, characterized in that, the super-wide-angle lens satisfies the following relationship: f / f12<-0.5; wherein f is the effective focal length of the super-wide-angle lens, and f12 is the combined focal length of the first lens and the second lens.

6. The ultra-wide-angle lens according to claim 1, characterized in that, the super-wide-angle lens satisfies the following relationship: -1<f / f3-f / f4<1; wherein f is the effective focal length of the super-wide-angle lens, f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens.

7. The ultra-wide-angle lens according to claim 1, characterized in that, the super-wide-angle lens satisfies the following relationship: -3<R6 / R7<0; wherein R6 is the radius of curvature of the image side surface of the third lens, and R7 is the radius of curvature of the object side surface of the fourth lens.

8. The ultra-wide-angle lens according to claim 1, characterized in that, the super-wide-angle lens satisfies the following relationship: CT4 / CT5<4; wherein CT4 is the thickness of the fourth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis.

9. A camera module, characterized by The camera module comprises: the super-wide-angle lens according to any one of claims 1-8; and a photosensitive element, which is arranged on the image side of the super-wide-angle lens.

10. An electronic device, characterized by comprising: The electronic device comprises: a housing; and the camera module according to claim 9, which is mounted on the housing for acquiring images. The electronic device comprises: a housing; and the camera module according to claim 9, which is mounted on the housing for acquiring images.

Images