Optical imaging lenses and electronic equipment

Abstract

The present invention discloses an optical imaging lens, wherein the first lens has positive refractive power, the second lens has negative refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis, the object side surface of the third lens is convex at the near optical axis, the fourth lens has positive refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis, the image side surface of the fifth lens is concave at the near optical axis, the sixth lens has positive refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is convex at the near optical axis, the seventh lens has negative refractive power, the object side surface thereof is concave at the near optical axis, and the image side surface thereof is concave at the near optical axis, and the image side surface thereof has at least one inflection point in a region far from the optical axis, and by reasonably configuring the ratio of the total optical length to the focal length and the relationship between the distance and thickness between the third lens and the fourth lens, a high imaging quality can be maintained and the overall length of the lens group can be effectively shortened. The present invention also discloses an electronic device.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging lenses, and in particular to an optical imaging lens. The present invention also relates to an electronic device. Background Art

[0002] In recent years, with the booming development of miniaturized camera lenses, the demand for small imaging modules has been increasing. With the advancement of semiconductor process technology, the pixel size of photosensitive elements has been reduced. In addition, the current trend of electronic products is to have good functions and a thin and short appearance. Therefore, miniaturized camera lenses with good imaging quality have become the mainstream in the current market.

[0003] With the rapid development of science and technology, the application scope of camera modules is becoming more and more diverse. At the same time, as portable electronic devices develop towards multifunctionality, the requirements for the image quality of the camera modules they carry have also increased, and the volume restrictions on camera modules have also become more stringent. However, the camera modules equipped with six lenses in the existing technology are difficult to meet the current market requirements for image quality, so there is a need for a camera module with seven lenses to meet the current high standards of image quality. However, the existing camera modules equipped with seven lenses are not easy to meet the volume restrictions of portable electronic devices. Summary of the invention

[0004] The object of the present invention is to provide an optical imaging lens that can simultaneously meet the requirements of high imaging quality and miniaturization. The present invention also provides an electronic device.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An optical imaging lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in order from the object side to the image side, each lens having an object side surface facing the object side and an image side surface facing the image side, wherein: the first lens has positive refractive power, the second lens has negative refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis, the object side surface of the third lens is convex at the near optical axis, the fourth lens has positive refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis, the image side surface of the fifth lens is concave at the near optical axis, the sixth lens has positive refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is convex at the near optical axis, the seventh lens has negative refractive power, the object side surface thereof is concave at the near optical axis, and the image side surface thereof is concave at the near optical axis, and the image side surface thereof has at least one inflection point in a region away from the optical axis, and satisfies the following conditional formula:

[0007] 1<TTL / f<1.55;

[0008] 0.1≤T 34 / (CT3+CT4)≤0.5;

[0009] Wherein, TTL represents the total optical length of the optical imaging lens, f represents the focal length of the optical imaging lens, T 34 represents the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis, CT3 represents the thickness of the third lens on the optical axis, and CT4 represents the thickness of the fourth lens on the optical axis.

[0010] Preferably, the object side surface of the first lens is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis.

[0011] Preferably, the following condition is also satisfied: 0.8<(R 32 +R 31 ) / (R 32 -R 31 )<4.4, where R 31 represents the radius of curvature of the object side of the third lens, R 32 represents the radius of curvature of the image-side surface of the third lens.

[0012] Preferably, the fifth lens has negative refractive power, and its object side surface is convex at the near optical axis, and also satisfies the following conditional formula: 0.4 <R 51 / R 52 <2.1, where R 51 represents the radius of curvature of the object side of the fifth lens, R 52 represents the radius of curvature of the image-side surface of the fifth lens.

[0013] Preferably, the object side surface of the sixth lens has at least one inflection point in a region far from the optical axis, and the image side surface thereof has at least one inflection point in a region far from the optical axis, and the following conditional formula is also satisfied: f6 / |R 61 |+f6 / |R 62 |<2.1, where f6 represents the focal length of the sixth lens, R 61 represents the radius of curvature of the object side of the sixth lens, R 62 represents the radius of curvature of the image-side surface of the sixth lens.

[0014] Preferably, the following condition is also satisfied: 1.6<|f2 / f|<3.3, wherein f2 represents the focal length of the second lens.

[0015] Preferably, the following condition is also satisfied: 0.35<f / ΣCT≤1.2, wherein ΣCT represents the sum of thicknesses of the first lens to the seventh lens on the optical axis.

[0016] Preferably, the following condition is also satisfied: 0.8<ET7 / CT7≤2.2, wherein ET7 represents the edge thickness of the seventh lens, and CT7 represents the thickness of the seventh lens on the optical axis.

[0017] Preferably, the following condition is also satisfied: 0.7≤LCT 15 / LCT 47 ≤1.7, where LCT 15 It represents the distance from the object side of the first lens to the image side of the fifth lens on the optical axis, LCT 47 Represents the distance from the object side of the fourth lens to the image side of the seventh lens on the optical axis.

[0018] Preferably, the following condition is also satisfied: 1.1<Fno<1.65, wherein Fno represents the aperture value of the optical imaging lens.

[0019] An electronic device comprises a camera device, wherein the camera device comprises an electronic photosensitive element and the above-mentioned optical imaging lens, and the electronic photosensitive element is arranged on the imaging surface of the optical imaging lens.

[0020] It can be seen from the above technical scheme that an optical imaging lens provided by the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side, and the object side light passes through each lens in sequence and is imaged onto an imaging surface located on the image side of the seventh lens. The optical imaging lens is a seven-piece lens structure, and can have good imaging quality by adopting a reasonable surface shape of each lens and an optimized range combination of optical parameters of each lens. Among them, by reasonably configuring the ratio of its total optical length to focal length, and by controlling the ratio of the distance from the image side of the third lens to the object side of the fourth lens on the optical axis to the sum of the thickness of the third lens on the optical axis and the thickness of the fourth lens on the optical axis, the overall structure of the lens is in a better thickness ratio, which helps to shorten the overall length of the optical lens. Therefore, the optical imaging lens of the present invention can effectively shorten the overall length of the lens group while maintaining a high imaging quality and having a large field of view, meeting application requirements.

[0021] The electronic device provided by the present invention can achieve the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of an optical imaging lens provided in Embodiment 1 of the present invention;

[0024] FIG. 2( a ) and FIG. 2( b ) are respectively an astigmatism curve diagram and a distortion curve diagram of the optical imaging lens in Example 1 of the present invention;

[0025] Figure 3 is a spherical aberration curve diagram of the optical imaging lens in Example 1 of the present invention;

[0026] Figure 4 A schematic diagram of an optical imaging lens provided in Embodiment 2 of the present invention;

[0027] FIG5(a) and FIG5(b) are respectively an astigmatism curve diagram and a distortion curve diagram of the optical imaging lens in Example 2 of the present invention;

[0028] Figure 6 is a spherical aberration curve diagram of the optical imaging lens in Example 2 of the present invention;

[0029] Figure 7 A schematic diagram of an optical imaging lens provided in Embodiment 3 of the present invention;

[0030] FIG8( a ) and FIG8( b ) are respectively an astigmatism curve diagram and a distortion curve diagram of the optical imaging lens in Example 3 of the present invention;

[0031] Fig. 9 is a spherical aberration curve diagram of the optical imaging lens in Example 3 of the present invention;

[0032] Fig.10 A schematic diagram of an optical imaging lens provided in Embodiment 4 of the present invention;

[0033] FIG. 11( a ) and FIG. 11( b ) are respectively an astigmatism curve diagram and a distortion curve diagram of the optical imaging lens in Example 4 of the present invention;

[0034] Fig.12 is a spherical aberration curve diagram of the optical imaging lens in Example 4 of the present invention;

[0035] Fig.13 A schematic diagram of an optical imaging lens provided in Example 5 of the present invention;

[0036] FIG. 14( a ) and FIG. 14( b ) are respectively an astigmatism curve diagram and a distortion curve diagram of the optical imaging lens in Example 5 of the present invention;

[0037] Fig.15 is a spherical aberration curve diagram of the optical imaging lens in Example 5 of the present invention;

[0038] Fig.16 A schematic diagram of an optical imaging lens provided in Example 6 of the present invention;

[0039] FIG. 17( a ) and FIG. 17( b ) are respectively an astigmatism curve diagram and a distortion curve diagram of the optical imaging lens in Example 6 of the present invention;

[0040] Fig.18 4 is a spherical aberration curve diagram of the optical imaging lens in Example 6 of the present invention. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0042] The present invention provides an optical imaging lens, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side, each lens having an object side surface facing the object side and an image side surface facing the image side.

[0043] The first lens has positive refractive power, and its object side surface may be convex at the near optical axis, and its image side surface may be concave at the near optical axis. The second lens has negative refractive power, its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The object side surface of the third lens is convex at the near optical axis. The fourth lens has positive refractive power, its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The fifth lens may have negative refractive power, its object side surface may be convex at the near optical axis, and its image side surface is concave at the near optical axis. The sixth lens has positive refractive power, its object side surface is convex at the near optical axis, its image side surface is convex at the near optical axis, its object side surface has at least one inflection point in a region far from the optical axis, and its image side surface has at least one inflection point in a region far from the optical axis. The seventh lens element has negative refractive power, the object side surface of the seventh lens element is concave near the optical axis, the image side surface of the seventh lens element is concave near the optical axis, and the image side surface has at least one inflection point in a region far from the optical axis.

[0044] The optical imaging lens is a seven-lens structure. By adopting a reasonable surface shape for each lens and combining the optical parameters of each lens in an optimized range, it can have good imaging quality. By controlling the aperture size, it can maintain a high imaging quality and have a large field of view while having a large amount of light entering. By reasonably configuring the ratio of its total optical length to focal length, and by controlling the ratio of the distance from the image side of the third lens to the object side of the fourth lens on the optical axis to the sum of the thickness of the third lens on the optical axis and the thickness of the fourth lens on the optical axis, the overall structure of the lens is in an optimal thickness ratio, which helps to shorten the overall length of the optical lens. Therefore, the optical imaging lens of the present invention can effectively shorten the overall length of the lens group while maintaining a high imaging quality and having a large field of view, thereby meeting application requirements.

[0045] Preferably, the optical imaging lens also satisfies the following condition: 0.8<(R 32 +R 31 ) / (R 32 -R 31 )<4.4, where R 31 represents the radius of curvature of the object side of the third lens, R 32 represents the radius of curvature of the image-side surface of the third lens.

[0046] Preferably, the optical imaging lens also satisfies the following condition: 0.4 <R 51 / R 52 <2.1, where R 51 represents the radius of curvature of the object side of the fifth lens, R 52 represents the radius of curvature of the image-side surface of the fifth lens.

[0047] Preferably, the optical imaging lens also satisfies the following condition: f6 / |R 61 |+f6 / |R 62 |<2.1, where f6 represents the focal length of the sixth lens, R 61 represents the radius of curvature of the object side of the sixth lens, R 62 represents the radius of curvature of the image-side surface of the sixth lens.

[0048] Preferably, the optical imaging lens further satisfies the following condition: 1.6<|f2 / f|<3.3, wherein f2 represents the focal length of the second lens.

[0049] Preferably, the optical imaging lens system further satisfies the following condition: 0.35<f / ∑CT≤1.2, wherein ∑CT represents the sum of the thicknesses of the first lens to the seventh lens on the optical axis.

[0050] Preferably, the optical imaging lens system further satisfies the following condition: 0.8<ET7 / CT7≤2.2, wherein ET7 represents the edge thickness of the seventh lens, and CT7 represents the thickness of the seventh lens on the optical axis.

[0051] Preferably, the optical imaging lens also satisfies the following condition: 0.7≤LCT 15 / LCT 47 ≤1.7, where LCT 15 It represents the distance from the object side of the first lens to the image side of the fifth lens on the optical axis, LCT 47 Represents the distance from the object side of the fourth lens to the image side of the seventh lens on the optical axis.

[0052] Preferably, the optical imaging lens further satisfies the following condition: 1.1<Fno<1.65, wherein Fno represents the aperture value of the optical imaging lens.

[0053] It should be noted that refractive power refers to the deflection of the propagation direction of parallel light through an optical system, which is used to characterize the refractive power of the optical system for incident parallel light beams. An optical system with positive refractive power indicates that the refraction of light is convergent; an optical system with negative refractive power indicates that the refraction of light is divergent. In the optical imaging lens of the present invention, if the refractive power or focal length of the lens does not define its regional position, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens at the near optical axis.

[0054] For the arrangement of each lens in the lens, when the object side to the image side is from left to right, the object side of the lens is convex, which means that when the object side of the lens is cut through any point on the surface, the surface is always on the right side of the cut surface, and its radius of curvature is positive. On the contrary, the object side is concave, and its radius of curvature is negative. The image side of the lens is convex, which means that when the image side of the lens is cut through any point on the surface, the surface is always on the left side of the cut surface, and its radius of curvature is negative. On the contrary, the image side is concave, and its radius of curvature is positive. If a section is made through any point on the object side or image side of the lens, the surface has both a part on the left side and a part on the right side of the cut surface, then there is an inflection point on the surface. The above judgment of convexity and concavity at the near optical axis of the object side and image side of the lens still applies. In addition, the near optical axis refers to the area near the optical axis. In the optical imaging lens of the present invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface.

[0055] In the optical imaging lens disclosed in the present invention, the lenses are all made of materials with high light transmittance and excellent processability. For example, plastic is used to make the lenses, which is conducive to the production and molding of the lenses, so as to improve the manufacturing yield and also help reduce production costs. In addition, the object side and image side of each lens can be aspherical surfaces (ASP), and the aspherical surface can be easily made into a shape other than a spherical surface, so as to obtain more control variables to reduce aberrations and thus reduce the number of lenses used, thereby effectively reducing the total length of the camera lens. In addition, any two adjacent lenses of the optical imaging lens can have a gap, which is conducive to the assembly of the lenses to improve the manufacturing yield.

[0056] In addition, in the optical imaging lens of the present invention, at least one aperture can be provided as required to reduce stray light and help improve the imaging quality. In the present invention, the aperture configuration can be a front aperture, that is, the aperture is provided between the object and the first lens. The front setting of the aperture can make the exit pupil of the optical imaging lens have a longer distance from the imaging surface, so that it has a telecentric effect, and can increase the efficiency of the CCD or CMOS of the electronic photosensitive element in receiving the image.

[0057] The optical imaging lens of the present invention is described in detail below with specific embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0058] [Example 1]

[0059] Please refer to Figure 1 , shows a schematic structural diagram of the optical imaging lens of Example 1. As can be seen from the figure, the optical imaging lens of this embodiment includes an aperture 10, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16 and a seventh lens 17 arranged in sequence from the object side to the image side along the optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and the object side surface and the image side surface of each lens are both aspherical surfaces.

[0060] The first lens 11 has positive refractive power, and its object side surface may be convex at the near optical axis, and its image side surface may be concave at the near optical axis. The second lens 12 has negative refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The object side surface of the third lens 13 is convex at the near optical axis. The fourth lens 14 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The fifth lens 15 may have negative refractive power, and its object side surface may be convex at the near optical axis, and its image side surface is concave at the near optical axis. The sixth lens 16 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is convex at the near optical axis, and its object side surface has at least one inflection point in a region far from the optical axis, and its image side surface has at least one inflection point in a region far from the optical axis. The seventh lens 17 has negative refractive power, its object side surface is concave near the optical axis, its image side surface is concave near the optical axis, and its image side surface has at least one inflection point in the area away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 18 placed between the seventh lens 17 and the imaging surface 19, and the infrared filter 18 filters out the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip and generating noise. The optional filter material is glass and does not affect the focal length.

[0061] Detailed optical data of Example 1 are shown in Table 1-1, where the units of the radius of curvature, thickness and focal length are in millimeters, f is the focal length of the optical imaging lens, Fno is the aperture value, HFOV is half of the maximum field of view, and surfaces 1-18 represent the surfaces from the object side to the image side in sequence. Among them, surfaces 1-15 represent the aperture, the first lens object side surface, the first lens image side surface, the second lens object side surface, the second lens image side surface, the third lens object side surface, the third lens image side surface, the fourth lens object side surface, the fourth lens image side surface, the fifth lens object side surface, the fifth lens image side surface, the sixth lens object side surface, the sixth lens image side surface, the seventh lens object side surface and the seventh lens image side surface in sequence.

[0062] Table 1-1

[0063]

[0064]

[0065] Each lens in this optical imaging lens adopts an aspherical design, and the curve equation of the aspherical surface is expressed as follows: Wherein, X represents the relative distance between a point on the aspheric surface at a distance Y from the optical axis and the tangent plane tangent to the vertex on the aspheric optical axis; R represents the radius of curvature; Y represents the vertical distance between the point on the aspheric curve and the optical axis; k represents the cone coefficient; Ai represents the i-th order aspheric coefficient.

[0066] The aspheric coefficients of each lens in this embodiment are shown in Table 1-2, k represents the cone coefficient in the aspheric curve equation, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface. The astigmatism curve, distortion curve and spherical aberration curve of the optical imaging lens in this embodiment are shown in Figures 2(a), 2(b) and Figure 3 As shown, the wavelength in the astigmatism curve and the distortion curve is 0.555μm, and the wavelength in the spherical aberration curve is 0.470μm, 0.510μm, 0.555μm, 0.610μm and 0.650μm. In addition, the following tables of the embodiments are the structural schematic diagrams, astigmatism curves, distortion curves and spherical aberration curves of the optical imaging lenses of the corresponding embodiments. The definitions of the data in the tables are the same as those in Table 1-1 and Table 1-2 of Example 1, and are not repeated here.

[0067] Table 1-2

[0068]

[0069] [Example 2]

[0070] Please refer to Figure 4 , shows a schematic structural diagram of the optical imaging lens of Example 2. As can be seen from the figure, the optical imaging lens of this embodiment includes an aperture 20, a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, a sixth lens 26 and a seventh lens 27 arranged in sequence from the object side to the image side along the optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and both the object side surface and the image side surface of each lens are aspherical surfaces.

[0071] The first lens 21 has positive refractive power, and its object side surface may be convex at the near optical axis, and its image side surface may be concave at the near optical axis. The second lens 22 has negative refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The object side surface of the third lens 23 is convex at the near optical axis. The fourth lens 24 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The fifth lens 25 may have negative refractive power, and its object side surface may be convex at the near optical axis, and its image side surface is concave at the near optical axis. The sixth lens 26 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is convex at the near optical axis, and its object side surface has at least one inflection point in a region far from the optical axis, and its image side surface has at least one inflection point in a region far from the optical axis. The seventh lens 27 has negative refractive power, its object side surface is concave near the optical axis, its image side surface is concave near the optical axis, and its image side surface has at least one inflection point in the area away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 28 placed between the seventh lens 27 and the imaging surface 29, and the infrared filter 28 filters out the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip and generating noise. The optional filter material is glass and does not affect the focal length.

[0072] Please refer to Table 2-1, Table 2-2 and Table 7 below. The corresponding astigmatism curve, distortion curve and spherical aberration curve are shown in Figure 5(a), Figure 5(b) and Figure 6 shown.

[0073] Table 2-1

[0074]

[0075]

[0076] Table 2-2

[0077]

[0078]

[0079] [Example 3]

[0080] Please refer to Figure 7 , shows a schematic structural diagram of an optical imaging lens of Example 3. As can be seen from the figure, the optical imaging lens of this embodiment includes an aperture 30, a first lens 31, a second lens 32, a third lens 33, a fourth lens 34, a fifth lens 35, a sixth lens 36 and a seventh lens 37 arranged in sequence from the object side to the image side along the optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and the object side surface and the image side surface of each lens are both aspherical surfaces.

[0081] The first lens 31 has positive refractive power, and its object side surface may be convex at the near optical axis, and its image side surface may be concave at the near optical axis. The second lens 32 has negative refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The object side surface of the third lens 33 is convex at the near optical axis. The fourth lens 34 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The fifth lens 35 may have negative refractive power, and its object side surface may be convex at the near optical axis, and its image side surface is concave at the near optical axis. The sixth lens 36 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is convex at the near optical axis, and its object side surface has at least one inflection point in a region far from the optical axis, and its image side surface has at least one inflection point in a region far from the optical axis. The seventh lens 37 has negative refractive power, its object side surface is concave near the optical axis, its image side surface is concave near the optical axis, and its image side surface has at least one inflection point in the area away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 38 placed between the seventh lens 37 and the imaging surface 39, and the infrared filter 38 filters out the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip and generating noise. The optional filter material is glass and does not affect the focal length.

[0082] Please refer to Table 3-1, Table 3-2 and Table 7 below. The corresponding astigmatism curve, distortion curve and spherical aberration curve are shown in Figure 8(a), Figure 8(b) and Fig. 9 shown.

[0083] Table 3-1

[0084]

[0085]

[0086] Table 3-2

[0087]

[0088]

[0089] [Example 4]

[0090] Please refer to Fig.10 , shows a schematic structural diagram of an optical imaging lens of Example 4. As can be seen from the figure, the optical imaging lens of this embodiment includes an aperture 40, a first lens 41, a second lens 42, a third lens 43, a fourth lens 44, a fifth lens 45, a sixth lens 46 and a seventh lens 47 arranged in sequence from the object side to the image side along the optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and both the object side surface and the image side surface of each lens are aspherical surfaces.

[0091] The first lens 41 has positive refractive power, and its object side surface may be convex at the near optical axis, and its image side surface may be concave at the near optical axis. The second lens 42 has negative refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The object side surface of the third lens 43 is convex at the near optical axis. The fourth lens 44 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The fifth lens 45 may have negative refractive power, and its object side surface may be convex at the near optical axis, and its image side surface is concave at the near optical axis. The sixth lens 46 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is convex at the near optical axis, and its object side surface has at least one inflection point in a region far from the optical axis, and its image side surface has at least one inflection point in a region far from the optical axis. The seventh lens 47 has negative refractive power, its object side surface is concave near the optical axis, its image side surface is concave near the optical axis, and its image side surface has at least one inflection point in the area away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 48 placed between the seventh lens 47 and the imaging surface 49, and the infrared filter 48 filters out the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip and generating noise. The optional filter material is glass and does not affect the focal length.

[0092] Please refer to Table 4-1, Table 4-2 and Table 7 below. The corresponding astigmatism curve, distortion curve and spherical aberration curve are shown in Figure 11(a), Figure 11(b) and Fig.12 shown.

[0093] Table 4-1

[0094]

[0095] Table 4-2

[0096]

[0097]

[0098] [Example 5]

[0099] Please refer to Fig.13 , shows a schematic structural diagram of an optical imaging lens of Example 5. As can be seen from the figure, the optical imaging lens of this embodiment includes an aperture 50, a first lens 51, a second lens 52, a third lens 53, a fourth lens 54, a fifth lens 55, a sixth lens 56 and a seventh lens 57 arranged in sequence from the object side to the image side along the optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and both the object side surface and the image side surface of each lens are aspherical surfaces.

[0100] The first lens 51 has positive refractive power, and its object side surface may be convex at the near optical axis, and its image side surface may be concave at the near optical axis. The second lens 52 has negative refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The object side surface of the third lens 53 is convex at the near optical axis. The fourth lens 54 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The fifth lens 55 may have negative refractive power, and its object side surface may be convex at the near optical axis, and its image side surface is concave at the near optical axis. The sixth lens 56 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is convex at the near optical axis, and its object side surface has at least one inflection point in the area far from the optical axis, and its image side surface has at least one inflection point in the area far from the optical axis. The seventh lens 57 has negative refractive power, its object side surface is concave near the optical axis, its image side surface is concave near the optical axis, and its image side surface has at least one inflection point in the area away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 58 placed between the seventh lens 57 and the imaging surface 59, and the infrared filter 58 filters out the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip and generating noise. The optional filter material is glass and does not affect the focal length.

[0101] Please refer to Table 5-1, Table 5-2 and Table 7 below. The corresponding astigmatism curve, distortion curve and spherical aberration curve are shown in Figure 14(a), Figure 14(b) and Fig.15 shown.

[0102] Table 5-1

[0103]

[0104]

[0105] Table 5-2

[0106]

[0107]

[0108] [Example 6]

[0109] Please refer to Fig.16 , shows a schematic structural diagram of an optical imaging lens of Example 6. As can be seen from the figure, the optical imaging lens of this embodiment includes an aperture 60, a first lens 61, a second lens 62, a third lens 63, a fourth lens 64, a fifth lens 65, a sixth lens 66 and a seventh lens 67 arranged in sequence from the object side to the image side along the optical axis, each lens has an object side surface facing the object side and an image side surface facing the image side, and both the object side surface and the image side surface of each lens are aspherical surfaces.

[0110] The first lens 61 has positive refractive power, and its object side surface may be convex at the near optical axis, and its image side surface may be concave at the near optical axis. The second lens 62 has negative refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The object side surface of the third lens 63 is convex at the near optical axis. The fourth lens 64 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis. The fifth lens 65 may have negative refractive power, and its object side surface may be convex at the near optical axis, and its image side surface is concave at the near optical axis. The sixth lens 66 has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is convex at the near optical axis. The seventh lens 67 has negative refractive power, and its object side surface is concave at the near optical axis, and its image side surface is concave at the near optical axis, and its image side surface has at least one inflection point in the area away from the optical axis. In addition, the optical imaging lens further includes an infrared filter 68 disposed between the seventh lens 67 and the imaging surface 69, and the infrared filter 68 filters out the infrared band light entering the lens to prevent the infrared light from irradiating the photosensitive chip and generating noise. The optional filter material is glass and does not affect the focal length.

[0111] Please refer to Table 6-1, Table 6-2 and Table 7 below. The corresponding astigmatism curve, distortion curve and spherical aberration curve are shown in Figure 17(a), Figure 17(b) and Fig.18 shown.

[0112] Table 6-1

[0113]

[0114] Table 6-2

[0115]

[0116]

[0117] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 7.

[0118] Table 7

[0119]

[0120]

[0121] Correspondingly, an embodiment of the present invention further provides an electronic device, including a camera device, wherein the camera device includes an electronic photosensitive element and the optical imaging lens described above, and the electronic photosensitive element is arranged on an imaging surface of the optical imaging lens.

[0122] The electronic device of this embodiment, whose camera device includes an optical imaging lens, can effectively shorten the overall length of the lens group while maintaining high imaging quality and a large field of view, thereby meeting application requirements.

[0123] The above is a detailed introduction to an optical imaging lens and an electronic device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An optical imaging lens, characterized in that: The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are arranged in order from the object side to the image side, each lens has an object side surface facing the object side and an image side surface facing the image side, wherein: the first lens has positive refractive power, the second lens has negative refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis, the third lens has positive refractive power, the object side surface of the third lens is convex at the near optical axis, the fourth lens has positive refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis. The side surface is concave at the near optical axis, the image side surface of the fifth lens is concave at the near optical axis, the sixth lens has positive refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is convex at the near optical axis, the object side surface of the sixth lens has at least one inflection point in a region far from the optical axis, and the image side surface thereof has at least one inflection point in a region far from the optical axis, the seventh lens has negative refractive power, the object side surface thereof is concave at the near optical axis, the image side surface thereof is concave at the near optical axis, and the image side surface thereof has at least one inflection point in a region far from the optical axis, and the following conditional formula is satisfied: 1<TTL / f<1.55; 0.1≤T 34 / (CT3+CT4)≤0.5; 0.8<ET7 / CT7≤2.2; Wherein, TTL represents the total optical length of the optical imaging lens, f represents the focal length of the optical imaging lens, T 34 represents the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis, CT3 represents the thickness of the third lens on the optical axis, CT4 represents the thickness of the fourth lens on the optical axis, ET7 represents the edge thickness of the seventh lens, and CT7 represents the thickness of the seventh lens on the optical axis.

2. The optical imaging lens according to claim 1, wherein: The object side surface of the first lens is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis.

3. The optical imaging lens according to claim 1, wherein: The following condition is also satisfied: 0.8<(R 32 +R 31 ) / (R 32 -R 31 )<4.4, where R 31 represents the radius of curvature of the object side of the third lens, R 32 represents the radius of curvature of the image-side surface of the third lens.

4. The optical imaging lens according to claim 1, wherein: The fifth lens has negative refractive power, and its object side surface is convex at the near optical axis, and also satisfies the following conditional formula: 0.4 <R 51 / R 52 <2.1, where R 51 represents the radius of curvature of the object side of the fifth lens, R 52 represents the radius of curvature of the image-side surface of the fifth lens.

5. The optical imaging lens according to claim 1, wherein: The following condition is also satisfied: f6 / |R 61 |+f6 / |R 62 |<2.1, where f6 represents the focal length of the sixth lens, R 61 represents the radius of curvature of the object side of the sixth lens, R 62 represents the radius of curvature of the image-side surface of the sixth lens.

6. The optical imaging lens according to claim 1, wherein: The following condition is also satisfied: 1.6<|f2 / f|<3.3, where f2 represents the focal length of the second lens.

7. The optical imaging lens according to claim 1, wherein: The following conditional formula is also satisfied: 0.35<f / ΣCT≤1.2, wherein ΣCT represents the total thickness of each lens from the first lens to the seventh lens on the optical axis.

8. The optical imaging lens according to claim 1, wherein: The following condition is also met: 0.7≤LCT 15 / LCT 47 ≤1.7, where LCT 15 LCT represents the distance from the object side of the first lens to the image side of the fifth lens on the optical axis. 47 It represents the distance from the object side of the fourth lens to the image side of the seventh lens on the optical axis.

9. The optical imaging lens according to claim 1, wherein: The following condition is also satisfied: 1.1<Fno<1.65, wherein Fno represents the aperture value of the optical imaging lens.

10. An electronic device, characterized in that: The imaging device comprises an electronic photosensitive element and the optical imaging lens according to any one of claims 1 to 9, wherein the electronic photosensitive element is arranged on an imaging surface of the optical imaging lens.

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