Optical imaging lens

Abstract

This invention discloses an optical imaging lens comprising, sequentially from the object side to the image side along the optical axis, a first to a seventh lens. Each lens has an object-side surface and an image-side surface. The optical imaging lens satisfies the following condition: EFL / (G12+G67)≦5.600. EFL is the system focal length of the optical imaging lens, G12 is the air gap between the first and second lenses on the optical axis, and G67 is the air gap between the sixth and seventh lenses on the optical axis. This optical imaging lens has a short lens length while simultaneously possessing good image quality.

Description

[0001] This invention is a divisional application with an application date of November 14, 2019, application number CN201911112827.0, and invention name: Optical Imaging Lens. Technical Field

[0002] The present invention relates to the field of optical imaging, and in particular to an optical imaging lens. Background Art

[0003] In recent years, optical imaging lenses have been evolving. In addition to requiring lenses to be thin, light, and short, it is becoming increasingly important to improve the imaging quality of lenses, such as aberrations and chromatic aberrations. However, in order to meet the demand, increasing the number of optical lenses will increase the distance from the object side of the first lens to the imaging surface on the optical axis, which is not conducive to the thinning of mobile phones and digital cameras. Therefore, providing an optical imaging lens that is thin, light, and short with good imaging quality has always been a design development goal. In addition, a small aperture value is conducive to increasing light flux, and a large field of view angle is gradually becoming a market trend. How to design an optical imaging lens with a small aperture value and a large field of view angle in addition to pursuing a thin, light, and short lens is also a research and development focus. Summary of the invention

[0004] The invention provides an optical imaging lens having a shorter lens length and good optical imaging quality.

[0005] An embodiment of the present invention provides an optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in order from the object side to the image side along the optical axis. Each lens has an object side surface facing the object side and allowing the imaging light to pass through, and an image side surface facing the image side and allowing the imaging light to pass through. The circumferential area of ​​the image side surface of the first lens is a concave surface. The circumferential area of ​​the image side surface of the second lens is a concave surface. The optical axis area of ​​the object side surface of the third lens is a convex surface, and the circumferential area of ​​the image side surface of the third lens is a convex surface. The optical axis area of ​​the image side surface of the fifth lens is a concave surface. The optical imaging lens has only the above-mentioned seven lenses, and the first lens has a positive refractive power or the third lens has a negative refractive power or the sixth lens has a positive refractive power or the seventh lens has a negative refractive power, and the second lens has a negative refractive power or the fourth lens has a positive refractive power; and EFL / (G12+G67)≦5.600 is satisfied.

[0006] An embodiment of the present invention provides an optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in order from the object side to the image side along the optical axis, each lens having an object side surface facing the object side and allowing the imaging light to pass through, and an image side surface facing the image side and allowing the imaging light to pass through. The first lens has a positive refractive power, and the circumferential area of ​​the image side surface of the first lens is a concave surface. The optical axis area of ​​the object side surface of the third lens is a convex surface, and the circumferential area of ​​the image side surface of the third lens is a convex surface. The optical axis area of ​​the image side surface of the fifth lens is a concave surface. The optical imaging lens has only the above-mentioned seven lenses, and the second lens has a negative refractive power or the fourth lens has a positive refractive power, and the third lens has a negative refractive power or the sixth lens has a positive refractive power or the seventh lens has a negative refractive power; and EFL / (G12+G67)≦5.600 is satisfied.

[0007] An embodiment of the present invention provides an optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in order from the object side to the image side along the optical axis, each lens having an object side surface facing the object side and allowing the imaging light to pass through and an image side surface facing the image side and allowing the imaging light to pass through. The optical axis area of ​​the image side surface of the first lens is a concave surface. The two lenses have negative refractive powers. The circumferential area of ​​the object side surface of the seventh lens is a convex surface. The optical imaging lens has only the above-mentioned seven lenses, and the first lens has a positive refractive power or the third lens has a negative refractive power or the fourth lens has a positive refractive power or the sixth lens has a positive refractive power or the seventh lens has a negative refractive power; and AAG / (G23+G34)≧3.500 is satisfied. And the sum of the air gap from the first lens to the second lens on the optical axis and the air gap from the third lens to the fourth lens on the optical axis is greater than the air gap from the fourth lens to the fifth lens on the optical axis.

[0008] An embodiment of the present invention provides an optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in order from the object side to the image side along the optical axis, each lens having an object side surface facing the object side and allowing the imaging light to pass through and an image side surface facing the image side and allowing the imaging light to pass through. The second lens has a negative refractive power, and the circumferential area of ​​the image side surface of the second lens is a concave surface. The optical axis area of ​​the object side surface of the fourth lens is a concave surface. The optical imaging lens has only the above-mentioned seven lenses, and the first lens has a positive refractive power or the third lens has a negative refractive power or the fourth lens has a positive refractive power or the sixth lens has a positive refractive power or the seventh lens has a negative refractive power; and AAG / (G23+G34)≧3.500. And the sum of the air gap on the optical axis from the first lens to the second lens and the air gap on the optical axis from the third lens to the fourth lens is greater than the air gap on the optical axis from the fourth lens to the fifth lens.

[0009] An embodiment of the present invention provides an optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in order from the object side to the image side along the optical axis, each lens having an object side surface facing the object side and allowing the imaging light to pass through and an image side surface facing the image side and allowing the imaging light to pass through. The first lens has a positive refractive power, and the optical axis area of ​​the image side surface of the first lens is a concave surface. The circumferential area of ​​the image side surface of the third lens is a convex surface. The circumferential area of ​​the object side surface of the seventh lens is a convex surface. The optical imaging lens has only the above-mentioned seven lenses, and the second lens has a negative refractive power or the third lens has a negative refractive power or the fourth lens has a positive refractive power or the sixth lens has a positive refractive power or the seventh lens has a negative refractive power; and AAG / (G23+G34)≧3.500 and ALT / (T5+G56)≦4.200 are satisfied.

[0010] An embodiment of the present invention provides an optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in order from the object side to the image side along the optical axis, each lens having an object side surface facing the object side and allowing the imaging light to pass through and an image side surface facing the image side and allowing the imaging light to pass through. The optical axis area of ​​the image side surface of the first lens is a concave surface. The second lens has a negative refractive power. The optical axis area of ​​the object side surface of the fourth lens is a concave surface. The sixth lens has a positive refractive power. The optical imaging lens has only the above-mentioned seven lenses, and the first lens has a positive refractive power or the third lens has a negative refractive power or the fourth lens has a positive refractive power or the seventh lens has a negative refractive power; and AAG / (G23+G34)≧3.500 and ALT / (T5+G56)≦4.200 are satisfied.

[0011] In the optical imaging lens of the present invention, the embodiment may also selectively meet any of the following conditions as required:

[0012] (G56+T6+G67) / (TG34+GT45)≧2.600

[0013] (G23+T4) / T3≦5.200,

[0014] V2+V3+V6≦110.000,

[0015] ALT / (T5+G56)≦4.200,

[0016] ALT / BFL≦5.500,

[0017] EFL / (G12+G67)≦5.600,

[0018] (T2+G23) / T7≦2.000,

[0019] (T3+T4+T5) / T6≦2.100,

[0020] AAG / T1≦4.000,

[0021] TL / (G12+T6+T7)≦4.700,

[0022] (T3+T4) / T2≧2.800,

[0023] (EFL+G12) / BFL≧4.400,

[0024] TTL / (G23+T4+G56)≦4.600,

[0025] (T2+T3+T5) / T4≦1.900,

[0026] AAG / (G23+G34)≧3.500,

[0027] ImgH / Fno≧2.500mm,

[0028] (T1+T4) / (T2+T3)≧1.900,

[0029] (T4+T6) / GT45≧2.800,

[0030] (G12+G23+G56) / TG34≧2.500,

[0031] Wherein G12 is the air gap between the first lens and the second lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, G67 is the air gap between the sixth lens and the seventh lens on the optical axis, TG34 is the distance from the object side surface of the third lens to the object side surface of the fourth lens on the optical axis, and GT45 is the distance from the image side surface of the fourth lens to the image side surface of the fifth lens on the optical axis.

[0032] T1 is the thickness of the first lens on the optical axis, T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, T6 is the thickness of the sixth lens on the optical axis, and T7 is the thickness of the seventh lens on the optical axis.

[0033] V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, and V6 is the Abbe number of the sixth lens.

[0034] TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, AAG is the sum of the six air gaps from the first lens to the seventh lens on the optical axis, ImgH is the image height of the optical imaging lens, Fno is the aperture value of the optical imaging lens, EFL is the system focal length of the optical imaging lens, BFL is the distance from the image side of the seventh lens to the imaging plane on the optical axis, TL is the distance from the object side of the first lens to the image side of the seventh lens on the optical axis, and ALT is the sum of the thicknesses of the seven lenses from the first lens to the seventh lens on the optical axis.

[0035] Based on the above, in the optical imaging lens of the embodiment of the present invention, it includes the first to seventh lenses in sequence from the object side to the image side along the optical axis. By controlling the arrangement design of the concave and convex surfaces of each lens and satisfying the corresponding conditional expression, the optical imaging lens has a short lens length and good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram illustrating the surface structure of a lens.

[0037] Figure 2 It is a schematic diagram illustrating the concave-convex structure of a lens surface and the focus of light.

[0038] Figure 3 is a schematic diagram illustrating the surface structure of a lens of Example 1.

[0039] Figure 4 is a schematic diagram illustrating the surface structure of a lens of Example 2.

[0040] Figure 5 is a schematic diagram illustrating the surface structure of a lens of Example 3.

[0041] Figure 6 It is a schematic diagram of an optical imaging lens according to a first embodiment of the present invention.

[0042] Figure 7 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the first embodiment.

[0043] Figure 8 It is a table diagram of detailed optical data of the optical imaging lens of the first embodiment of the present invention.

[0044] Fig. 9 It is a table diagram of aspherical parameters of the optical imaging lens according to the first embodiment of the present invention.

[0045] Fig.10 FIG. 4 is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention.

[0046] Fig.11 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the second embodiment.

[0047] Fig.12 Detailed optical data table of the optical imaging lens according to the second embodiment of the present invention.

[0048] Fig.13 It is a table diagram of aspherical parameters of the optical imaging lens according to the second embodiment of the present invention.

[0049] Fig.14 FIG. 4 is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention.

[0050] Fig.15 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the third embodiment.

[0051] Fig.16 Detailed optical data table of the optical imaging lens according to the third embodiment of the present invention.

[0052] Fig.17 It is a table diagram of aspherical parameters of the optical imaging lens according to the third embodiment of the present invention.

[0053] Fig.18 FIG. 4 is a schematic diagram of an optical imaging lens according to a fourth embodiment of the present invention.

[0054] Fig.19 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the fourth embodiment.

[0055] Fig. 20 Detailed optical data table of the optical imaging lens according to the fourth embodiment of the present invention.

[0056] Fig.21 It is a table diagram of aspherical parameters of the optical imaging lens according to the fourth embodiment of the present invention.

[0057] Fig. 22 FIG. 4 is a schematic diagram of an optical imaging lens according to a fifth embodiment of the present invention.

[0058] Fig.23 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the fifth embodiment.

[0059] Fig.24 Detailed optical data table of the optical imaging lens according to the fifth embodiment of the present invention.

[0060] Fig.25 It is a table diagram of aspherical parameters of the optical imaging lens according to the fifth embodiment of the present invention.

[0061] Fig.26 FIG. 4 is a schematic diagram of an optical imaging lens according to a sixth embodiment of the present invention.

[0062] Fig. 27 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the sixth embodiment.

[0063] Fig.28 Detailed optical data table of the optical imaging lens according to the sixth embodiment of the present invention.

[0064] Fig.29 It is a table diagram of aspherical parameters of the optical imaging lens according to the sixth embodiment of the present invention.

[0065] Fig.30 FIG. 4 is a schematic diagram of an optical imaging lens according to a seventh embodiment of the present invention.

[0066] Fig.31 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the seventh embodiment.

[0067] Fig.32 Detailed optical data table of the optical imaging lens according to the seventh embodiment of the present invention.

[0068] Fig.33 It is a table diagram of aspherical parameters of the optical imaging lens according to the seventh embodiment of the present invention.

[0069] Fig.34 is a schematic diagram of an optical imaging lens according to an eighth embodiment of the present invention.

[0070] Fig.35 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the eighth embodiment.

[0071] Fig.36 Detailed optical data table of the optical imaging lens according to the eighth embodiment of the present invention.

[0072] Fig.37 It is a table diagram of aspherical parameters of the optical imaging lens according to the eighth embodiment of the present invention.

[0073] Fig.38 is a schematic diagram of an optical imaging lens according to a ninth embodiment of the present invention.

[0074] Fig.39 Graphs showing longitudinal spherical aberration and various aberrations of the optical imaging lens of the ninth embodiment.

[0075] Fig.40 Detailed optical data table of the optical imaging lens of the ninth embodiment of the present invention.

[0076] Fig.41 It is a table diagram of aspherical parameters of the optical imaging lens according to the ninth embodiment of the present invention.

[0077] Fig.42 as well as Fig.44It is a numerical table diagram of important parameters and their relationship expressions of the optical imaging lenses of the first to fifth embodiments of the present invention.

[0078] Fig.43 as well as Fig.45 FIG. 4 is a numerical table diagram of important parameters and their relationship equations of the optical imaging lenses of the sixth to ninth embodiments of the present invention. DETAILED DESCRIPTION

[0079] Before describing the present invention in detail, the following explanations of the symbols in the drawings are provided: 100, 200, 300, 400, 500: lenses; 110, 25, 35, 45, 55, 65, 75, 95, 410, 510: object side surfaces; 120, 26, 36, 46, 56, 66, 76, 96, 320: image side surfaces; 130: assembly portion; 151, 162, 251, 262, 351, 362, 452, 461, 551, 562, 651, 652, 661, 752, 762, Z1: optical axis area; 153, 164, 253, 264, 354, 363, 453, 454, 46 3, 554, 563, 654, 663, 753, 754, 763, Z2: circular area; 211, 212: parallel light; 0: aperture; 1: first lens; 2: second lens; 3: third lens; 4: fourth lens; 5: fifth lens; 6: sixth lens; 7: seventh lens; 9: filter; 10: optical imaging lens; A1: object side; A2: image side; CP: center point; CP1: first center point; CP2: second center point; TP1: first transition point; TP2: second transition point; OB: optical boundary; I: optical axis; Lc: principal light; Lm: marginal light; EL: extension line; Z3: relay area; M, R: intersection points.

[0080] The terms "optical axis region", "circumferential region", "concave surface" and "convex surface" used in this specification and the claims should be interpreted based on the definitions listed in this specification.

[0081] The optical system of this specification includes at least one lens, which receives imaging light from the incident optical system that is parallel to the optical axis and within a half-field of view (HFOV) angle relative to the optical axis. The imaging light is imaged on the imaging plane through the optical system. The phrase "a lens has a positive refractive power (or a negative refractive power)" refers to the paraxial refractive power of the lens calculated by Gaussian optical theory being positive (or negative). The "object side (or image side) of the lens" is defined as a specific range where the imaging light passes through the lens surface. The imaging light includes at least two types of light: the chief ray Lc and the marginal ray Lm (such as Figure 1The object side (or image side) of the lens can be divided into different regions according to different positions, including an optical axis region, a circumferential region, or one or more intermediate regions in some embodiments. The description of these regions will be described in detail below.

[0082] Figure 1 is a radial cross-sectional view of the lens 100. Two reference points on the surface of the lens 100 are defined: a center point and a transition point. The center point of the lens surface is an intersection of the surface and the optical axis I. Figure 1 As shown in the example, the first center point CP1 is located at the object side surface 110 of the lens 100, and the second center point CP2 is located at the image side surface 120 of the lens 100. A conversion point is a point on the lens surface, and the tangent of the point is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All conversion points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, if a single lens surface has multiple conversion points, the conversion points are named in sequence from the first conversion point in the radial outward direction. For example, the first conversion point TP1 (closest to the optical axis I), the second conversion point TP2 (closest to the optical axis I), and the second conversion point TP2 (closest to the optical axis I). Figure 4 as shown) and the Nth conversion point (farthest from the optical axis I).

[0083] The range from the center point to the first transition point TP1 is defined as the optical axis area, wherein the optical axis area includes the center point. The area from the Nth transition point farthest from the optical axis I to the optical boundary OB is defined as the circumferential area. In some embodiments, a relay area between the optical axis area and the circumferential area may be further included, and the number of relay areas depends on the number of transition points.

[0084] When a light ray parallel to the optical axis I passes through an area, if the light ray is deflected toward the optical axis I and the intersection with the optical axis I is located at the image side A2 of the lens, then the area is convex. When a light ray parallel to the optical axis I passes through an area, if the intersection of the extended line of the light ray and the optical axis I is located at the object side A1 of the lens, then the area is concave.

[0085] In addition, see Figure 1 The lens 100 may further include an assembly portion 130 extending radially outward from the optical boundary OB. The assembly portion 130 is generally used for assembling the lens 100 to a corresponding component (not shown) of the optical system. The imaging light does not reach the assembly portion 130. The structure and shape of the assembly portion 130 are merely examples for illustrating the present invention and are not intended to limit the scope of the present invention. The assembly portion 130 of the lens discussed below may be partially or completely omitted in the drawings.

[0086] See also Figure 2, define the area between the center point CP and the first transition point TP1 as the optical axis area Z1. Define the area between the first transition point TP1 and the optical boundary OB of the lens surface as the circumferential area Z2. Figure 2 As shown, after passing through the optical axis region Z1, the parallel light 211 intersects with the optical axis I at the image side A2 of the lens 200, that is, the focus of the parallel light 211 passing through the optical axis region Z1 is located at point R on the image side A2 of the lens 200. Since the light intersects with the optical axis I at the image side A2 of the lens 200, the optical axis region Z1 is a convex surface. On the contrary, the parallel light 212 diverges after passing through the circumferential region Z2. Figure 2 As shown, the extended line EL of the parallel light 212 after passing through the circumferential area Z2 intersects with the optical axis I at the object side A1 of the lens 200, that is, the focus of the parallel light 212 passing through the circumferential area Z2 is located at point M on the object side A1 of the lens 200. Since the extended line EL of the light intersects with the optical axis I at the object side A1 of the lens 200, the circumferential area Z2 is a concave surface. Figure 2 In the lens 200 shown, the first transition point TP1 is the boundary between the optical axis area and the circumferential area, that is, the first transition point TP1 is the boundary point where the convex surface turns into the concave surface.

[0087] On the other hand, the surface convexity of the optical axis area can also be determined according to the judgment method of the general knowledgeable person in the field, that is, the convexity of the surface shape of the optical axis area of ​​the lens can be determined by the positive and negative signs of the curvature radius of the paraxial axis (abbreviated as R value). R value can be commonly used in optical design software, such as Zemax or CodeV. R value is also commonly found in the lens data sheet of optical design software. For the object side, when the R value is positive, the optical axis area of ​​the object side is determined to be convex; when the R value is negative, the optical axis area of ​​the object side is determined to be concave. On the contrary, for the image side, when the R value is positive, the optical axis area of ​​the image side is determined to be concave; when the R value is negative, the optical axis area of ​​the image side is determined to be convex. The result of this method is consistent with the result of the above-mentioned determination method by the intersection of the light ray / light extension line and the optical axis. The determination method of the intersection of the light ray / light extension line and the optical axis is to determine the surface convexity by the focus of a light ray parallel to the optical axis located on the object side or image side of the lens. The terms “a region is convex (or concave)”, “a region is convex (or concave)” or “a convex (or concave) region” described in this specification can be used interchangeably.

[0088] Figures 3 to 5 Examples are provided for determining the surface shape and area boundaries of lens areas in various situations, including the aforementioned optical axis area, circumferential area, and relay area.

[0089] Figure 3 is a radial cross-sectional view of the lens 300. Figure 3, the image side surface 320 of the lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis area Z1 and the circumferential area Z2 of the image side surface 320 of the lens 300 are as follows: Figure 3 The R value of the image-side surface 320 is positive (ie, R>0), and therefore, the optical axis region Z1 is a concave surface.

[0090] Generally speaking, the shapes of the areas bounded by the conversion point are opposite to those of the adjacent areas. Therefore, the conversion point can be used to define the transition of the surface shape, that is, from concave to convex or from convex to concave. Figure 3 In the figure, since the optical axis area Z1 is a concave surface, the surface shape changes at the transition point TP1, so the circumferential area Z2 is a convex surface.

[0091] Figure 4 is a radial cross-sectional view of the lens 400. Figure 4 , there is a first transition point TP1 and a second transition point TP2 on the object side surface 410 of the lens 400. The area between the optical axis I and the first transition point TP1 is defined as an optical axis region Z1 of the object side surface 410. The R value of the object side surface 410 is positive (ie, R>0), and therefore, the optical axis region Z1 is a convex surface.

[0092] The area between the second transition point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 is defined as a circumferential area Z2, and the circumferential area Z2 of the object side surface 410 is also a convex surface. In addition, the area between the first transition point TP1 and the second transition point TP2 is defined as a relay area Z3, and the relay area Z3 of the object side surface 410 is a concave surface. Figure 4 The object side surface 410 includes, radially outward from the optical axis I, an optical axis region Z1 between the optical axis I and the first conversion point TP1, a relay region Z3 between the first conversion point TP1 and the second conversion point TP2, and a circumferential region Z2 between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of the lens 400. Since the optical axis region Z1 is a convex surface, the surface shape changes from the first conversion point TP1 to a concave surface, so the relay region Z3 is a concave surface, and the surface shape changes from the second conversion point TP2 to a convex surface, so the circumferential region Z2 is a convex surface.

[0093] Figure 5 is a radial cross-sectional view of the lens 500. The object side surface 510 of the lens 500 has no transition point. For a lens surface without a transition point, such as the object side surface 510 of the lens 500, 0 to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis area, and 50 to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential area. Figure 5The lens 500 shown in the figure defines the optical axis region Z1 of the object side surface 510 as 50% of the distance from the optical axis I to the optical boundary OB of the lens 500 surface. The R value of the object side surface 510 is positive (i.e., R>0), so the optical axis region Z1 is a convex surface. Since the object side surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the object side surface 510 is also a convex surface. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0094] Figure 6 is a schematic diagram of an optical imaging lens according to a first embodiment of the present invention, and Figure 7 A to Figure 7 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the first embodiment. Please refer to Figure 6 The optical imaging lens 10 of the first embodiment of the present invention includes an aperture 0, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7 and a filter 9 in order from the object side A1 to the image side A2 along an optical axis I of the optical imaging lens 10. When light emitted by an object to be photographed enters the optical imaging lens 10 and passes through the aperture 0, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7 and the filter 9, an image is formed on an image plane 99. The filter 9 is, for example, an IR cut filter, which is used to prevent infrared rays of a certain wavelength band in the light from being transmitted to the image plane 100 and affecting the image quality. It should be noted that the object side A1 is the side facing the object to be photographed, and the image side A2 is the side facing the image plane 99.

[0095] The first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7 and the filter 9 each have an object-side surface 15, 25, 35, 45, 55, 65, 75, 95 facing the object side and allowing imaging light to pass therethrough, and an image-side surface 16, 26, 36, 46, 56, 66, 76, 96 facing the image side and allowing imaging light to pass therethrough.

[0096] The aperture 0 is disposed between the object side A1 and the first lens 1 .

[0097] The first lens 1 has a positive refractive power. The material of the first lens 1 is plastic. The optical axis region 151 of the object side surface 15 of the first lens 1 is a convex surface, and its circumferential region 153 is a convex surface. The optical axis region 162 of the image side surface 16 of the first lens 1 is a concave surface, and its circumferential region 164 is a concave surface. In the present embodiment, the object side surface 15 and the image side surface 16 of the first lens 1 are both aspheric surfaces, but the present invention is not limited thereto.

[0098] The second lens 2 has a negative refractive power. The material of the second lens 2 is plastic. The optical axis region 251 of the object side surface 25 of the second lens 2 is a convex surface, and its circumferential region 253 is a convex surface. The optical axis region 262 of the image side surface 26 of the second lens 2 is a concave surface, and its circumferential region 264 is a concave surface. In this embodiment, the object side surface 25 and the image side surface 26 of the second lens 2 are both aspherical surfaces, but the present invention is not limited thereto.

[0099] The third lens 3 has a negative refractive power. The material of the third lens 3 is plastic. The optical axis region 351 of the object side surface 35 of the third lens 3 is a convex surface, and its circumferential region 354 is a concave surface. The optical axis region 362 of the image side surface 36 of the third lens 3 is a concave surface, and its circumferential region 363 is a convex surface. In this embodiment, the object side surface 35 and the image side surface 36 of the third lens 3 are both aspherical surfaces, but the present invention is not limited thereto.

[0100] The fourth lens 4 has a positive refractive power. The material of the fourth lens 4 is plastic. The optical axis region 452 of the object side surface 45 of the fourth lens 4 is a concave surface, and the circumferential region 454 thereof is a concave surface. The optical axis region 461 of the image side surface 46 of the fourth lens 4 is a convex surface, and the circumferential region 463 thereof is a convex surface. In the present embodiment, the object side surface 45 and the image side surface 46 of the fourth lens 4 are both aspherical surfaces, but the present invention is not limited thereto.

[0101] The fifth lens 5 has a negative refractive power. The material of the fifth lens 5 is plastic. The optical axis region 551 of the object side surface 55 of the fifth lens 5 is a convex surface, and its circumferential region 554 is a concave surface. The optical axis region 562 of the image side surface 56 of the fifth lens 5 is a concave surface, and its circumferential region 563 is a convex surface. In this embodiment, the object side surface 55 and the image side surface 56 of the fifth lens 5 are both aspherical surfaces, but the present invention is not limited thereto.

[0102] The sixth lens 6 has a positive refractive power. The sixth lens 6 is made of plastic. The optical axis region 651 of the object side surface 65 of the sixth lens 6 is a convex surface, and its circumferential region 654 is a concave surface. The optical axis region 661 of the image side surface 66 of the sixth lens 6 is a convex surface, and its circumferential region 663 is a convex surface. In the present embodiment, the object side surface 65 and the image side surface 66 of the sixth lens 6 are both aspherical surfaces, but the present invention is not limited thereto.

[0103] The seventh lens 7 has a negative refractive power. The seventh lens 7 is made of plastic. The optical axis region 752 of the object side surface 75 of the seventh lens 7 is a concave surface, and the circumferential region 754 thereof is a concave surface. The optical axis region 762 of the image side surface 76 of the seventh lens 7 is a concave surface, and the circumferential region 763 thereof is a convex surface. In the present embodiment, the object side surface 75 and the image side surface 76 of the seventh lens 7 are both aspherical surfaces, but the present invention is not limited thereto.

[0104] The filter 9 is disposed between the seventh lens 7 and the imaging surface 99 .

[0105] In this embodiment, the optical imaging lens system 10 has only the seven lenses having refractive powers.

[0106] Other detailed optical data of the first embodiment are as follows Figure 8 As shown, the overall system focal length (EFL) of the optical imaging lens system 10 of the first embodiment is 4.576 millimeters (mm), the half field of view (HFOV) is 43.168 degrees, the aperture value (F-number, Fno) is 1.800, the system length is 5.748 mm, and the image height is 4.500 mm, wherein the system length refers to the distance from the object-side surface 15 of the first lens 1 to the imaging surface 99 on the optical axis I.

[0107] In addition, in this embodiment, the object-side surfaces 15, 25, 35, 45, 55, 65, 75 and the image-side surfaces 16, 26, 36, 46, 56, 66, 76 of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7, a total of fourteen surfaces, are aspheric surfaces, wherein the object-side surfaces 15, 25, 35, 45, 55, 65, 75 and the image-side surfaces 16, 26, 36, 46, 56, 66, 76 are general even aspheric surfaces. These aspheric surfaces are defined according to the following formulas:

[0108]

[0109] in:

[0110] R: radius of curvature of the lens surface at the near optical axis I;

[0111] Z: Depth of the aspherical surface (the vertical distance between the point on the aspherical surface that is Y away from the optical axis I and the tangent plane that is tangent to the vertex on the aspherical optical axis I);

[0112] Y: the distance between the point on the aspheric curve and the optical axis I;

[0113] K: conic constant;

[0114] a 2i : 2i-th order aspheric coefficient.

[0115] The aspheric coefficients of the various items from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are as follows: Fig. 9 As shown. Among them, Fig. 9The field number 15 in the middle indicates the aspheric coefficient of the object side surface 15 of the first lens 1, and the other fields are similar. In addition, for the sake of simplicity, the second-order aspheric coefficients a2 of the object side surfaces 15, 25, 35, 45, 55, 65, 75 and the image side surfaces 16, 26, 36, 46, 56, 66, 76 of each lens 1 to 7 of the optical imaging lens 10 in the embodiment of the present invention are all 0, and thus are omitted.

[0116] In addition, the relationship between the important parameters of the optical imaging lens 10 of the first embodiment is as follows: Fig.42 , 44 shown.

[0117] in,

[0118] EFL is the system focal length of the optical imaging lens 10;

[0119] HFOV is the half viewing angle of the optical imaging lens 10;

[0120] Fno is the aperture value of the optical imaging lens 10;

[0121] ImgH is the image height of the optical imaging lens 10;

[0122] T1 is the thickness of the first lens 1 on the optical axis I;

[0123] T2 is the thickness of the second lens 2 on the optical axis I;

[0124] T3 is the thickness of the third lens 3 on the optical axis I;

[0125] T4 is the thickness of the fourth lens 4 on the optical axis I;

[0126] T5 is the thickness of the fifth lens 5 on the optical axis I;

[0127] T6 is the thickness of the sixth lens 6 on the optical axis I;

[0128] T7 is the thickness of the seventh lens 7 on the optical axis I;

[0129] G12 is the distance between the image side surface 16 of the first lens 1 and the object side surface 25 of the second lens 2 on the optical axis I, that is, the air gap between the first lens 1 and the second lens 2 on the optical axis I;

[0130] G23 is the distance between the image side surface 26 of the second lens 2 and the object side surface 35 of the third lens 3 on the optical axis I, that is, the air gap between the second lens 2 and the third lens 3 on the optical axis I;

[0131] G34 is the distance between the image side surface 36 of the third lens 3 and the object side surface 45 of the fourth lens 4 on the optical axis I, that is, the air gap between the third lens 3 and the fourth lens 4 on the optical axis I;

[0132] G45 is the distance between the image side surface 46 of the fourth lens 4 and the object side surface 55 of the fifth lens 5 on the optical axis I, that is, the air gap between the fourth lens 4 and the fifth lens 5 on the optical axis I;

[0133] G56 is the distance between the image side surface 56 of the fifth lens 5 and the object side surface 65 of the sixth lens 6 on the optical axis I, that is, the air gap between the fifth lens 5 and the sixth lens 6 on the optical axis I;

[0134] G67 is the distance between the image side surface 66 of the sixth lens 6 and the object side surface 75 of the seventh lens 7 on the optical axis I, that is, the air gap between the sixth lens 6 and the seventh lens 7 on the optical axis I;

[0135] G7F is the distance between the image side surface 76 of the seventh lens 7 and the object side surface 95 of the filter 9 on the optical axis I, that is, the air gap between the seventh lens 7 and the filter 9 on the optical axis I;

[0136] TF is the thickness of the filter 9 on the optical axis I;

[0137] GFP is the distance from the image side surface 96 of the filter 9 to the imaging surface 99 on the optical axis I, that is, the air gap from the filter 9 to the imaging surface 99 on the optical axis I;

[0138] TTL is the distance from the object side surface 15 of the first lens 1 to the imaging surface 99 on the optical axis I;

[0139] BFL is the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I;

[0140] AAG is the sum of six air gaps of the first lens 1 to the seventh lens 7 on the optical axis I, that is, the sum of six air gaps G12, G23, G34, G45, G56, and G67;

[0141] ALT is the sum of the thicknesses of the first lens 1 to the seventh lens 7 on the optical axis I, that is, the sum of the thicknesses of the seven lenses T1, T2, T3, T4, T5, T6 and T7;

[0142] TL is the distance on the optical axis I from the object-side surface 15 of the first lens element 1 to the image-side surface 76 of the seventh lens element 7 .

[0143] TG34 is the distance between the object side surface 35 of the third lens 3 and the object side surface 45 of the fourth lens 4 on the optical axis I;

[0144] GT45 is the distance between the image side surface 46 of the fourth lens 4 and the image side surface 56 of the fifth lens 5 on the optical axis I;

[0145] In addition, define:

[0146] f1 is the focal length of the first lens 1;

[0147] f2 is the focal length of the second lens 2;

[0148] f3 is the focal length of the third lens 3;

[0149] f4 is the focal length of the fourth lens 4;

[0150] f5 is the focal length of the fifth lens 5;

[0151] f6 is the focal length of the sixth lens 6;

[0152] f7 is the focal length of the seventh lens 7;

[0153] n1 is the refractive index of the first lens 1;

[0154] n2 is the refractive index of the second lens 2;

[0155] n3 is the refractive index of the third lens 3;

[0156] n4 is the refractive index of the fourth lens 4;

[0157] n5 is the refractive index of the fifth lens 5;

[0158] n6 is the refractive index of the sixth lens 6;

[0159] n7 is the refractive index of the seventh lens 7;

[0160] V1 is the Abbe number of the first lens 1, which may also be called the dispersion coefficient;

[0161] V2 is the Abbe number of the second lens 2;

[0162] V3 is the Abbe number of the third lens 3;

[0163] V4 is the Abbe number of the fourth lens 4;

[0164] V5 is the Abbe number of the fifth lens 5;

[0165] V6 is the Abbe number of the sixth lens 6; and

[0166] V7 is the Abbe number of the seventh lens 7.

[0167] Also refer to Figure 7 A to Figure 7 D, Figure 7 The diagram of A illustrates the longitudinal spherical aberration (Longitudinal Spherical Aberration) of the first embodiment. Figure 7 B and Figure 7The diagrams of C respectively illustrate the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging surface 99 of the first embodiment when the wavelength is 470nm, 555nm and 650nm. Figure 7 The diagram of D illustrates the distortion aberration of the first embodiment on the imaging surface 99 when the wavelength is 470nm, 555nm and 650nm. Figure 7 In A, the curves formed by each wavelength are very close and close to the middle, indicating that the off-axis light rays of different heights of each wavelength are concentrated near the imaging point. It can be seen from the deflection amplitude of the curve of each wavelength that the imaging point deviation of the off-axis light rays of different heights is controlled within the range of ±0.03 mm. Therefore, the first embodiment does significantly improve the spherical aberration of the same wavelength. In addition, the distances between the three representative wavelengths are also very close to each other, representing that the imaging positions of the light rays of different wavelengths are already very concentrated, thereby significantly improving the chromatic aberration.

[0168] exist Figure 7 B and Figure 7 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.07 mm, indicating that the optical system of the first embodiment can effectively eliminate aberrations. Figure 7 The distortion diagram of D shows that the distortion of the first embodiment is maintained within the range of ±5%, indicating that the distortion of the first embodiment meets the imaging quality requirements of the optical system. This shows that compared with the existing optical lens, the first embodiment can still provide good imaging quality under the condition that the system length has been shortened to about 5.748 mm. Therefore, the first embodiment can shorten the lens length and have good imaging quality while maintaining good optical performance.

[0169] Fig.10 is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention, and Fig.11 A to Fig.11 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the second embodiment. Please refer to Fig.10 , a second embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses 1, 2, 3, 4, 5, 6 and 7 are more or less different. In addition, in this embodiment, the circumferential area 453 of the object side surface 45 of the fourth lens 4 is convex. The fifth lens 5 has a positive refractive power. The optical axis area 652 of the object side surface 65 of the sixth lens 6 is concave. It should be noted here that in order to clearly show the drawing, Fig.10Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0170] Detailed optical data of the optical imaging lens 10 of the second embodiment are as follows: Fig.12 As shown, the overall system length of the optical imaging lens 10 of the second embodiment is 5.500 mm, the system focal length is 4.331 mm, the half field of view (HFOV) is 44.660 degrees, the image height is 4.500 mm, and the aperture value (Fno) is 1.800.

[0171] like Fig.13 As shown, the aspheric coefficients of the second embodiment from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are shown.

[0172] In addition, the relationship between the important parameters of the optical imaging lens 10 of the second embodiment is as follows: Fig.42 , 44 shown.

[0173] The longitudinal spherical aberration of the second embodiment is as follows: Fig.11 As shown in A, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.03 mm. Fig.11 B and Fig.11 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.08 mm. Fig.11 The distortion diagram of D shows that the distortion of the second embodiment is maintained within the range of ±6%.

[0174] From the above description, it can be known that the system length of the second embodiment is smaller than that of the first embodiment. The half viewing angle of the second embodiment is larger than that of the first embodiment, so the second embodiment has a larger angle range for receiving images than the first embodiment. In addition, the longitudinal spherical aberration of the second embodiment is smaller than that of the first embodiment.

[0175] Fig.14 is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention, and Fig.15 A to Fig.15 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the third embodiment. Fig.14, a third embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients, and parameters between these lenses 1, 2, 3, 4, 5, 6, and 7 are more or less different. In addition, in this embodiment, the circumferential region 453 of the object side surface 45 of the fourth lens 4 is a convex surface. The fifth lens 5 has a positive refractive power. The optical axis region 652 of the object side surface 65 of the sixth lens 6 is a concave surface. The circumferential region 753 of the object side surface 75 of the seventh lens 7 is a convex surface. It should be noted here that in order to clearly display the drawings, Fig.14 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0176] Detailed optical data of the optical imaging lens 10 of the third embodiment are as follows: Fig.16 As shown, the overall system length of the optical imaging lens 10 of the third embodiment is 5.465 mm, the system focal length is 4.275 mm, the half field of view (HFOV) is 45.383 degrees, the image height is 4.500 mm, and the aperture value (Fno) is 1.795.

[0177] like Fig.17 As shown, the aspheric coefficients of the third embodiment from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are shown.

[0178] In addition, the relationship between the important parameters of the optical imaging lens 10 of the third embodiment is as follows: Fig.42 , 44 shown.

[0179] The longitudinal spherical aberration of the third embodiment is as follows: Fig.15 As shown in A, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.035 mm. Fig.15 B and Fig.15 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.12 mm. Fig.15 The distortion diagram of D shows that the distortion of the third embodiment is maintained within the range of ±4.5%.

[0180] It can be seen from the above description that the system length of the third embodiment is smaller than that of the first embodiment. The half viewing angle of the third embodiment is larger than that of the first embodiment, so the third embodiment has a larger angle range for receiving images than the first embodiment. The aperture value of the third embodiment is smaller than that of the first embodiment. In addition, the distortion aberration of the third embodiment is smaller than that of the first embodiment.

[0181] Fig.18 is a schematic diagram of an optical imaging lens according to a fourth embodiment of the present invention, and Fig.19 A to Fig.19 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the fourth embodiment. Please refer to Fig.18 , a fourth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients, and parameters of these lenses 1, 2, 3, 4, 5, 6, and 7 are more or less different. In addition, in this embodiment, the circumferential region 453 of the object side surface 45 of the fourth lens 4 is a convex surface. The optical axis region 652 of the object side surface 65 of the sixth lens 6 is a concave surface. The circumferential region 753 of the object side surface 75 of the seventh lens 7 is a convex surface. It should be noted here that in order to clearly display the drawings, Fig.18 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0182] Detailed optical data of the optical imaging lens 10 of the fourth embodiment are as follows: Fig. 20 As shown, the overall system length of the optical imaging lens 10 of the fourth embodiment is 5.503 meters, the system focal length is 4.300 millimeters, the half field of view (HFOV) is 45.381 degrees, the image height is 4.500 millimeters, and the aperture value (Fno) is 1.600.

[0183] like Fig.21 As shown, the aspheric coefficients of the fourth embodiment from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are shown.

[0184] In addition, the relationship between the important parameters of the optical imaging lens 10 of the fourth embodiment is as follows: Fig.42 , 44 shown.

[0185] The longitudinal spherical aberration of the fourth embodiment is as follows: Fig.19 As shown in A, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.035 mm. Fig.19 B and Fig.19 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths within the entire field of view falls within ±0.25 mm. Fig.19 The distortion diagram of D shows that the distortion of the fourth embodiment is maintained within the range of ±3.2%.

[0186] From the above description, it can be known that the system length of the fourth embodiment is smaller than that of the first embodiment. The half viewing angle of the fourth embodiment is larger than that of the first embodiment, so compared with the first embodiment, the fourth embodiment has a larger angle range for receiving images. The aperture value of the fourth embodiment is smaller than that of the first embodiment. In addition, the distortion aberration of the fourth embodiment is smaller than that of the first embodiment. Fig. 22 is a schematic diagram of an optical imaging lens according to a fifth embodiment of the present invention, and Fig.23 A to Fig.23 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the fifth embodiment. Fig. 22 , a fifth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: various optical data, aspheric coefficients, and parameters of these lenses 1, 2, 3, 4, 5, 6, and 7 are more or less different. In addition, in this embodiment, the circumferential area 753 of the object side surface 75 of the seventh lens 7 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig. 22 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0187] Detailed optical data of the optical imaging lens 10 of the fifth embodiment are as follows: Fig.24 As shown, the overall system length of the optical imaging lens 10 of the fifth embodiment is 5.497 mm, the system focal length is 4.164 mm, the half field of view (HFOV) is 46.541 degrees, the image height is 4.500 mm, and the aperture value (Fno) is 1.750.

[0188] like Fig.25 As shown, the aspheric coefficients of the fifth embodiment from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are shown.

[0189] In addition, the relationship between the important parameters of the optical imaging lens 10 of the fifth embodiment is as follows: Fig.42 , 44 shown.

[0190] The longitudinal spherical aberration of the fifth embodiment is as follows: Fig.23 As shown in A, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.02 mm. Fig.23 B and Fig.23 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.16 mm. Fig.23 The distortion diagram of D shows that the distortion of the fifth embodiment is maintained within the range of ±2.8%.

[0191] It can be known from the above description that the system length of the fifth embodiment is smaller than the system length of the first embodiment. The half viewing angle of the fifth embodiment is larger than the half viewing angle of the first embodiment, so compared with the first embodiment, the fifth embodiment has a larger angle range for receiving images. The aperture value of the fifth embodiment is smaller than the aperture value of the first embodiment. The longitudinal aberration of the fifth embodiment is smaller than the longitudinal aberration of the first embodiment. In addition, the distortion aberration of the fifth embodiment is smaller than the distortion aberration of the first embodiment.

[0192] Fig.26 is a schematic diagram of an optical imaging lens according to a sixth embodiment of the present invention, and Fig. 27 A to Fig. 27 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the sixth embodiment. Fig.26 , a sixth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: various optical data, aspheric coefficients, and the parameters of these lenses 1, 2, 3, 4, 5, 6, and 7 are more or less different. In addition, in this embodiment, the optical axis area 652 of the object side surface 65 of the sixth lens 6 is a concave surface. The circumferential area 753 of the object side surface 75 of the seventh lens 7 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig.26 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0193] Detailed optical data of the optical imaging lens 10 of the sixth embodiment are as follows: Fig.28 As shown, the overall system length of the optical imaging lens 10 of the sixth embodiment is 5.497 mm, the system focal length is 4.334 mm, the half field of view (HFOV) is 45.378 degrees, the image height is 4.500 mm, and the aperture value (Fno) is 1.784.

[0194] like Fig.29 As shown, the aspheric coefficients of the sixth embodiment from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are shown.

[0195] In addition, the relationship between the important parameters of the optical imaging lens 10 of the sixth embodiment is as follows: Fig.43 , 45 shown.

[0196] The longitudinal spherical aberration of the sixth embodiment is as follows: Fig. 27 As shown in A, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.02 mm. Fig. 27 B and Fig. 27 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.16 mm. Fig. 27The distortion diagram of D shows that the distortion of the sixth embodiment is maintained within the range of ±2.8%.

[0197] It can be seen from the above description that the system length of the sixth embodiment is smaller than that of the first embodiment. The half viewing angle of the sixth embodiment is larger than that of the first embodiment, so the sixth embodiment has a larger angle range for receiving images than the first embodiment. The aperture value of the sixth embodiment is smaller than that of the first embodiment. In addition, the distortion aberration of the sixth embodiment is smaller than that of the first embodiment.

[0198] Fig.30 is a schematic diagram of an optical imaging lens according to a seventh embodiment of the present invention, and Fig.31 A to Fig.31 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the seventh embodiment. Please refer to Fig.30 , a seventh embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients, and the parameters between these lenses 1, 2, 3, 4, 5, 6, and 7 are more or less different. In addition, in this embodiment, the circumferential region 453 of the object side surface 45 of the fourth lens 4 is a convex surface. The fifth lens 5 has a positive refractive power. The optical axis region 652 of the object side surface 65 of the sixth lens 6 is a concave surface. The circumferential region 753 of the object side surface 75 of the seventh lens 7 is a convex surface. It should be noted here that in order to clearly display the drawings, Fig.30 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0199] Detailed optical data of the optical imaging lens 10 of the seventh embodiment are as follows: Fig.32 As shown, the overall system length of the optical imaging lens 10 of the seventh embodiment is 5.498 mm, the system focal length is 4.311 mm, the half field of view (HFOV) is 45.378 degrees, the image height is 4.500 mm, and the aperture value (Fno) is 1.600.

[0200] like Fig.33 As shown, the aspheric coefficients of the seventh embodiment from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are shown.

[0201] In addition, the relationship between the important parameters of the optical imaging lens 10 of the seventh embodiment is as follows: Fig.43 , 45 shown.

[0202] The longitudinal spherical aberration of the seventh embodiment is as follows: Fig.31 As shown in A, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.03 mm. Fig.31 B and Fig.31 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.12 mm. Fig.31 The distortion diagram of D shows that the distortion of the seventh embodiment is maintained within the range of ±3.5%.

[0203] It can be seen from the above description that the system length of the seventh embodiment is smaller than that of the first embodiment. The half viewing angle of the seventh embodiment is larger than that of the first embodiment, so compared with the first embodiment, the seventh embodiment has a larger angle range for receiving images. The aperture value of the seventh embodiment is smaller than that of the first embodiment. In addition, the distortion aberration of the seventh embodiment is smaller than that of the first embodiment.

[0204] Fig.34 is a schematic diagram of an optical imaging lens according to an eighth embodiment of the present invention, and Fig.35 A to Fig.35 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the eighth embodiment. Please refer to Fig.30 , an eighth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: optical data, aspheric coefficients, and parameters of these lenses 1, 2, 3, 4, 5, 6, and 7 are more or less different. In addition, in this embodiment, the circumferential area 453 of the object side surface 45 of the fourth lens 4 is a convex surface. The circumferential area 753 of the object side surface 75 of the seventh lens 7 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig.34 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0205] Detailed optical data of the optical imaging lens 10 of the eighth embodiment are as follows: Fig.36 As shown, the overall system length of the optical imaging lens 10 of the eighth embodiment is 5.496 mm, the system focal length is 4.347 mm, the half field of view (HFOV) is 45.159 degrees, the image height is 4.500 mm, and the aperture value (Fno) is 1.650.

[0206] like Fig.37 As shown, the aspheric coefficients of the eighth embodiment from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are shown.

[0207] In addition, the relationship between the important parameters of the optical imaging lens 10 of the eighth embodiment is as follows: Fig.43 , 45 shown.

[0208] The longitudinal spherical aberration of the eighth embodiment is as follows: Fig.35As shown in A, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.025 mm. Fig.35 B and Fig.35 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.09 mm. Fig.35 The distortion diagram of D shows that the distortion of the eighth embodiment is maintained within the range of ±4.5%.

[0209] It can be known from the above description that the system length of the eighth embodiment is less than the system length of the first embodiment. The half viewing angle of the eighth embodiment is greater than the half viewing angle of the first embodiment, so compared with the first embodiment, the eighth embodiment has a larger angle range for receiving images. The aperture value of the eighth embodiment is less than the aperture value of the first embodiment. The longitudinal aberration of the eighth embodiment is less than the longitudinal aberration of the first embodiment. In addition, the distortion aberration of the eighth embodiment is less than the distortion aberration of the first embodiment.

[0210] Fig.38 is a schematic diagram of an optical imaging lens according to a ninth embodiment of the present invention, and Fig.39 A to Fig.39 D is the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the ninth embodiment. Fig.38 , a ninth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients, and the parameters of these lenses 1, 2, 3, 4, 5, 6, and 7 are more or less different. In addition, in this embodiment, the optical axis area 652 of the object side surface 65 of the sixth lens 6 is a concave surface. The circumferential area 753 of the object side surface 75 of the seventh lens 7 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig.38 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0211] Detailed optical data of the optical imaging lens 10 of the ninth embodiment are as follows: Fig.40 As shown, the overall system length of the optical imaging lens 10 of the ninth embodiment is 5.700 mm, the system focal length is 4.560 mm, the half field of view (HFOV) is 43.397 degrees, the image height is 4.500 mm, and the aperture value (Fno) is 1.800.

[0212] like Fig.41 As shown, the aspheric coefficients of the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in the formula (1) are shown in the ninth embodiment.

[0213] In addition, the relationship between the important parameters of the optical imaging lens 10 of the ninth embodiment is as follows: Fig.43 , 45shown.

[0214] The longitudinal spherical aberration of the ninth embodiment is as follows: Fig.39 As shown in A, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.025 mm. Fig.39 B and Fig.39 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.09 mm. Fig.39 The distortion diagram of D shows that the distortion of the ninth embodiment is maintained within the range of ±4.5%.

[0215] From the above description, it can be known that the system length of the ninth embodiment is shorter than that of the first embodiment. The half viewing angle of the ninth embodiment is longer than that of the first embodiment. Therefore, compared with the first embodiment, the ninth embodiment has a larger angle range for receiving images. The longitudinal aberration of the ninth embodiment is smaller than that of the first embodiment. In addition, the distortion aberration of the ninth embodiment is smaller than that of the first embodiment. Figure 42 to Figure 45 It is a table diagram of various optical parameters of the first embodiment to the ninth embodiment.

[0216] In order to shorten the system length of the optical imaging lens 10, the air gap between lenses or the thickness of the lenses can be adjusted appropriately. However, the difficulty of manufacturing and the image quality must be considered at the same time. Therefore, if the numerical limits of the following conditional expression are met, a better configuration can be achieved.

[0217] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (G23+T4) / T3≦5.200, wherein a preferred range is 3.200≦(G23+T4) / T3≦5.200.

[0218] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: ALT / (T5+G56)≦4.200, wherein a preferred range is 2.900≦ALT / (T5+G56)≦4.200.

[0219] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: ALT / BFL≦5.500, wherein a preferred range is 2.400≦ALT / BFL≦5.500.

[0220] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: EFL / (G12+G67)≦5.600, wherein a preferred range is 4.400≦EFL / (G12+G67)≦5.600.

[0221] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (T2+G23) / T7≦2.000, wherein a preferred range is 0.800≦(T2+G23) / T7≦2.000.

[0222] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (T3+T4+T5) / T6≦2.100, wherein a preferred range is 1.200≦(T3+T4+T5) / T6≦2.100.

[0223] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: AAG / T1≦4.000, wherein a preferred range is 2.300≦AAG / T1≦4.000.

[0224] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: TL / (G12+T6+T7)≦4.700, wherein a preferred range is 3.500≦TL / (G12+T6+T7)≦4.700.

[0225] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (T3+T4) / T2≧2.800, wherein a preferred range is 2.800≦(T3+T4) / T2≦4.700.

[0226] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (EFL+G12) / BFL≧4.400, wherein a preferred range is 4.400≦(EFL+G12) / BFL≦7.800.

[0227] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: TTL / (G23+T4+G56)≦4.600, wherein a preferred range is 3.000≦TTL / (G23+T4+G56)≦4.600.

[0228] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (T2+T3+T5) / T4≦1.900, wherein a preferred range is 0.800≦(T2+T3+T5) / T4≦1.900.

[0229] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: AAG / (G23+G34)≧3.500, wherein a preferred range is 3.500≦AAG / (G23+G34)≦5.400.

[0230] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (T1+T4) / (T2+T3)≧1.900, wherein a preferred range is 1.900≦(T1+T4) / (T2+T3)≦3.200.

[0231] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (T4+T6) / GT45≧2.800, wherein a preferred range is 2.800≦(T4+T6) / GT45≦4.300.

[0232] In the optical imaging lens 10 of the embodiment of the present invention, the following conditional expression may be further satisfied: (G12+G23+G56) / TG34≧2.500, wherein a preferred range is 2.500≦(G12+G23+G56) / TG34≦4.200.

[0233] In addition, any combination of parameters of the embodiment can be selected to increase lens restrictions, so as to facilitate the design of lenses with the same structure of the present invention. In view of the unpredictability of optical system design, under the structure of the present invention, meeting the above conditional formula can better shorten the depth of the optical imaging lens of the embodiment of the present invention, increase the available aperture, and improve the imaging quality, or improve the assembly yield to improve the shortcomings of the prior art.

[0234] The exemplary limiting relationships listed above can also be selectively combined in different quantities and applied to the implementation of the present invention, and are not limited thereto. When implementing the present invention, in addition to the aforementioned relationships, other detailed structures such as the arrangement of concave and convex surfaces of other lenses can also be designed for a single lens or for multiple lenses in a broad sense to enhance the control of system performance and / or resolution. It should be noted that these details need to be selectively combined and applied to other embodiments of the present invention without conflict.

[0235] In summary, the optical imaging lens 10 of the embodiment of the present invention can achieve the following effects and advantages:

[0236] 1. The longitudinal spherical aberration, astigmatism, and distortion of each embodiment of the present invention all meet the use specifications. In addition, the off-axis light rays of the three representative wavelengths of red, green, and blue at different heights are all concentrated near the imaging point. From the deflection amplitude of each curve, it can be seen that the imaging point deviations of the off-axis light rays at different heights are all controlled and have good spherical aberration, aberration, and distortion suppression capabilities. Further referring to the imaging quality data, the distances between the three representative wavelengths of red, green, and blue are also quite close to each other, indicating that the present invention has good concentration of light rays of different wavelengths under various conditions and has excellent dispersion suppression capabilities. In summary, the present invention can produce excellent imaging quality through the design and mutual matching of the lenses.

[0237] 2. In the optical imaging lens of the embodiment of the present invention, by designing the refractive power of the third lens element 3 to be negative, the optical axis region 452 of the object-side surface 45 of the fourth lens element 4 to be a concave surface, and the optical axis region 752 of the object-side surface 75 of the seventh lens element 7 to be a concave surface, and in combination with one of the following two conditions 1 and 2, condition 1: the refractive power of the second lens element 2 to be negative, or condition 2: the circumferential region 663 of the image-side surface 66 of the sixth lens element 6 to be convex, the purposes of correcting the spherical aberration and aberration of the optical system, reducing distortion, reducing the aperture value and expanding the field of view can be effectively achieved.

[0238] 3. In the optical imaging lens of the embodiment of the present invention, in addition to the design of the surface shape and the refractive index, when the condition (G56+T6+G67) / (TG34+GT45)≧2.600 is met, the system length of the optical imaging lens 10 can be effectively shortened, and the preferred range is 2.600≦(G56+T6+G67) / (TG34+GT45)≦3.500.

[0239] 4. In the optical imaging lens of the embodiment of the present invention, when the condition V2+V3+V6≦110.000 is met, the chromatic aberration can be effectively improved, and the preferred range is 90.000≦V2+V3+V6≦110.000.

[0240] 5. In the optical imaging lens of the embodiment of the present invention, when the conditional expression is met, ImgH / Fno≧2.500 mm, the purpose of reducing the aperture value can be achieved, and the preferred range is 2.500 mm≦ImgH / Fno≦2.900 mm.

[0241] The numerical ranges obtained by the combination ratio relationship of the optical parameters disclosed in each embodiment of the present invention, including the maximum and minimum values, can be implemented accordingly.

Claims

1. An optical imaging lens, comprising, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each lens having an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein: A circumferential area of ​​the image side surface of the first lens is a concave surface, an optical axis area of ​​the object side surface of the first lens is a convex surface, a circumferential area of ​​the object side surface of the first lens is a convex surface, and an optical axis area of ​​the image side surface of the first lens is a concave surface; A circumferential area of ​​the image side surface of the second lens is a concave surface, an optical axis area of ​​the object side surface of the second lens is a convex surface, a circumferential area of ​​the object side surface of the second lens is a convex surface, and an optical axis area of ​​the image side surface of the second lens is a concave surface; An optical axis region of the object side surface of the third lens is a convex surface, a circumferential region of the image side surface of the third lens is a convex surface, a circumferential region of the object side surface of the third lens is a concave surface, and an optical axis region of the image side surface of the third lens is a concave surface; An optical axis region of the object side surface of the fourth lens is a concave surface, an optical axis region of the image side surface of the fourth lens is a convex surface, and a circumferential region of the image side surface of the fourth lens is a convex surface; An optical axis region of the image-side surface of the fifth lens is a concave surface, an optical axis region of the object-side surface of the fifth lens is a convex surface, a circumferential region of the object-side surface of the fifth lens is a concave surface, and a circumferential region of the image-side surface of the fifth lens is a convex surface; A circumferential area of ​​the object side surface of the sixth lens is a concave surface, an optical axis area of ​​the image side surface of the sixth lens is a convex surface, and a circumferential area of ​​the image side surface of the sixth lens is a convex surface; An optical axis region of the object side surface of the seventh lens is a concave surface, an optical axis region of the image side surface of the seventh lens is a concave surface, and a circumferential region of the image side surface of the seventh lens is a convex surface; The optical imaging lens has only the above seven lenses, and the first lens has a positive refractive power, the second lens has a negative refractive power, the third lens has a negative refractive power, the fourth lens has a positive refractive power, the sixth lens has a positive refractive power, and the seventh lens has a negative refractive power; And meet EFL / (G12+G67)≦5.600, Wherein, EFL is a system focal length of the optical imaging lens, G12 is an air gap between the first lens and the second lens on the optical axis, and G67 is an air gap between the sixth lens and the seventh lens on the optical axis.

2. The optical imaging lens as claimed in claim 1 , wherein the optical imaging lens further satisfies that a sum of an air gap between the first lens and the second lens on the optical axis and an air gap between the third lens and the fourth lens on the optical axis is greater than an air gap between the fourth lens and the fifth lens on the optical axis.

3. The optical imaging lens of claim 1 , wherein the optical imaging lens further satisfies the following conditional expression: TL / (G12+T6+T7)≦4.700; wherein TL is a distance from the object-side surface of the first lens to the image-side surface of the seventh lens on the optical axis, T6 is a thickness of the sixth lens on the optical axis, and T7 is a thickness of the seventh lens on the optical axis.

4. The optical imaging lens of claim 1 , wherein the optical imaging lens further satisfies the following conditional formula: AAG / (G23+G34)≧3.500; wherein AAG is the sum of six air gaps between the first lens to the seventh lens on the optical axis, G23 is an air gap between the second lens to the third lens on the optical axis, and G34 is an air gap between the third lens to the fourth lens on the optical axis.

5. An optical imaging lens, comprising, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each lens having an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein: An optical axis region of the image side surface of the first lens is a concave surface, an optical axis region of the object side surface of the first lens is a convex surface, a circumferential region of the object side surface of the first lens is a convex surface, and a circumferential region of the image side surface of the first lens is a concave surface; The second lens has a negative refractive power, an optical axis region of the object side surface of the second lens is a convex surface, a circumferential region of the object side surface of the second lens is a convex surface, an optical axis region of the image side surface of the second lens is a concave surface, and a circumferential region of the image side surface of the second lens is a concave surface; An optical axis region of the object side surface of the third lens is a convex surface, a circumferential region of the object side surface of the third lens is a concave surface, an optical axis region of the image side surface of the third lens is a concave surface, and a circumferential region of the image side surface of the third lens is a convex surface; An optical axis region of the object side surface of the fourth lens is a concave surface, an optical axis region of the image side surface of the fourth lens is a convex surface, and a circumferential region of the image side surface of the fourth lens is a convex surface; An optical axis region of the object side surface of the fifth lens is a convex surface, a circumferential region of the object side surface of the fifth lens is a concave surface, an optical axis region of the image side surface of the fifth lens is a concave surface, and a circumferential region of the image side surface of the fifth lens is a convex surface; A circumferential area of ​​the object side surface of the sixth lens is a concave surface, an optical axis area of ​​the image side surface of the sixth lens is a convex surface, and a circumferential area of ​​the image side surface of the sixth lens is a convex surface; A circumferential area of ​​the object side surface of the seventh lens is a convex surface, an optical axis area of ​​the object side surface of the seventh lens is a concave surface, an optical axis area of ​​the image side surface of the seventh lens is a concave surface, and a circumferential area of ​​the image side surface of the seventh lens is a convex surface; The optical imaging lens has only the seven lenses mentioned above, and the first lens has a positive refractive power, the third lens has a negative refractive power, the fourth lens has a positive refractive power, the sixth lens has a positive refractive power, and the seventh lens has a negative refractive power; And satisfy AAG / (G23+G34)≧3.500; Wherein, AAG is the sum of six air gaps from the first lens to the seventh lens on the optical axis, G23 is an air gap from the second lens to the third lens on the optical axis, and G34 is an air gap from the third lens to the fourth lens on the optical axis; and The sum of an air gap between the first lens and the second lens on the optical axis and an air gap between the third lens and the fourth lens on the optical axis is greater than an air gap between the fourth lens and the fifth lens on the optical axis.

6. An optical imaging lens, comprising, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each lens having an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein: An optical axis region of the object side surface of the first lens is a convex surface, a circumferential region of the object side surface of the first lens is a convex surface, an optical axis region of the image side surface of the first lens is a concave surface, and a circumferential region of the image side surface of the first lens is a concave surface; The second lens has a negative refractive power, a circumferential area of ​​the image side surface of the second lens is a concave surface, an optical axis area of ​​the object side surface of the second lens is a convex surface, a circumferential area of ​​the object side surface of the second lens is a convex surface, and an optical axis area of ​​the image side surface of the second lens is a concave surface; An optical axis region of the object side surface of the third lens is a convex surface, a circumferential region of the object side surface of the third lens is a concave surface, an optical axis region of the image side surface of the third lens is a concave surface, and a circumferential region of the image side surface of the third lens is a convex surface; An optical axis region of the object side surface of the fourth lens is a concave surface, an optical axis region of the image side surface of the fourth lens is a convex surface, and a circumferential region of the image side surface of the fourth lens is a convex surface; An optical axis region of the object side surface of the fifth lens is a convex surface, a circumferential region of the object side surface of the fifth lens is a concave surface, an optical axis region of the image side surface of the fifth lens is a concave surface, and a circumferential region of the image side surface of the fifth lens is a convex surface; A circumferential area of ​​the object side surface of the sixth lens is a concave surface, an optical axis area of ​​the image side surface of the sixth lens is a convex surface, and a circumferential area of ​​the image side surface of the sixth lens is a convex surface; An optical axis region of the object side surface of the seventh lens is a concave surface, an optical axis region of the image side surface of the seventh lens is a concave surface, and a circumferential region of the image side surface of the seventh lens is a convex surface; The optical imaging lens has only the seven lenses mentioned above, and the first lens has a positive refractive power, the third lens has a negative refractive power, the fourth lens has a positive refractive power, the sixth lens has a positive refractive power, and the seventh lens has a negative refractive power; And satisfy AAG / (G23+G34)≧3.500; Wherein, AAG is the sum of six air gaps from the first lens to the seventh lens on the optical axis, G23 is an air gap from the second lens to the third lens on the optical axis, and G34 is an air gap from the third lens to the fourth lens on the optical axis; and The sum of an air gap between the first lens and the second lens on the optical axis and an air gap between the third lens and the fourth lens on the optical axis is greater than an air gap between the fourth lens and the fifth lens on the optical axis.

7. The optical imaging lens as claimed in claim 1 , 5 or 6 , wherein the optical imaging lens further satisfies the following condition: ALT / BFL≦5.500; wherein ALT is the sum of thicknesses of seven lenses from the first lens to the seventh lens on the optical axis, and BFL is a distance from the image-side surface of the seventh lens to an imaging plane on the optical axis.

8. The optical imaging lens as claimed in claim 1 , 5 or 6 , wherein the optical imaging lens further satisfies the following condition: (T3+T4+T5) / T6≦2.100; wherein T3 is a thickness of the third lens on the optical axis, T4 is a thickness of the fourth lens on the optical axis, T5 is a thickness of the fifth lens on the optical axis, and T6 is a thickness of the sixth lens on the optical axis.

9. The optical imaging lens of claim 1 , 5 or 6 , wherein the optical imaging lens further satisfies the following conditional formula: ALT / (T5+G56)≦4.200; wherein ALT is the sum of thicknesses of seven lenses from the first lens to the seventh lens on the optical axis, T5 is a thickness of the fifth lens on the optical axis, and G56 is an air gap from the fifth lens to the sixth lens on the optical axis.

10. 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 in order from an object side to an image side along an optical axis, each lens having an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein: The first lens has a positive refractive power, an optical axis region of the image side surface of the first lens is a concave surface; an optical axis region of the object side surface of the first lens is a convex surface, a circumferential region of the object side surface of the first lens is a convex surface, and a circumferential region of the image side surface of the first lens is a concave surface; An optical axis region of the object side surface of the second lens is a convex surface, a circumferential region of the object side surface of the second lens is a convex surface, an optical axis region of the image side surface of the second lens is a concave surface, and a circumferential region of the image side surface of the second lens is a concave surface; A circumferential area of ​​the image-side surface of the third lens is a convex surface, an optical axis area of ​​the object-side surface of the third lens is a convex surface, a circumferential area of ​​the object-side surface of the third lens is a concave surface, and an optical axis area of ​​the image-side surface of the third lens is a concave surface; An optical axis region of the object side surface of the fourth lens is a concave surface, an optical axis region of the image side surface of the fourth lens is a convex surface, and a circumferential region of the image side surface of the fourth lens is a convex surface; An optical axis region of the object side surface of the fifth lens is a convex surface, a circumferential region of the object side surface of the fifth lens is a concave surface, an optical axis region of the image side surface of the fifth lens is a concave surface, and a circumferential region of the image side surface of the fifth lens is a convex surface; A circumferential area of ​​the object side surface of the sixth lens is a concave surface, an optical axis area of ​​the image side surface of the sixth lens is a convex surface, and a circumferential area of ​​the image side surface of the sixth lens is a convex surface; A circumferential area of ​​the object side surface of the seventh lens is a convex surface, an optical axis area of ​​the object side surface of the seventh lens is a concave surface, an optical axis area of ​​the image side surface of the seventh lens is a concave surface, and a circumferential area of ​​the image side surface of the seventh lens is a convex surface; The optical imaging lens has only the seven lenses mentioned above, and the second lens has a negative refractive power, the third lens has a negative refractive power, the fourth lens has a positive refractive power, the sixth lens has a positive refractive power, and the seventh lens has a negative refractive power; And satisfy AAG / (G23+G34)≧3.500 and ALT / (T5+G56)≦4.200; Wherein, AAG is the sum of six air gaps from the first lens to the seventh lens on the optical axis, G23 is an air gap from the second lens to the third lens on the optical axis, G34 is an air gap from the third lens to the fourth lens on the optical axis, ALT is the sum of seven lens thicknesses from the first lens to the seventh lens on the optical axis, T5 is a thickness of the fifth lens on the optical axis, and G56 is an air gap from the fifth lens to the sixth lens on the optical axis.

11. An optical imaging lens, comprising, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each lens having an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein: An optical axis region of the image side surface of the first lens is a concave surface, an optical axis region of the object side surface of the first lens is a convex surface, a circumferential region of the object side surface of the first lens is a convex surface, and a circumferential region of the image side surface of the first lens is a concave surface; The second lens has a negative refractive power, an optical axis region of the object side surface of the second lens is a convex surface, a circumferential region of the object side surface of the second lens is a convex surface, an optical axis region of the image side surface of the second lens is a concave surface, and a circumferential region of the image side surface of the second lens is a concave surface; An optical axis region of the object side surface of the third lens is a convex surface, a circumferential region of the object side surface of the third lens is a concave surface, an optical axis region of the image side surface of the third lens is a concave surface, and a circumferential region of the image side surface of the third lens is a convex surface; An optical axis region of the object side surface of the fourth lens is a concave surface, an optical axis region of the image side surface of the fourth lens is a convex surface, and a circumferential region of the image side surface of the fourth lens is a convex surface; An optical axis region of the object side surface of the fifth lens is a convex surface, a circumferential region of the object side surface of the fifth lens is a concave surface, an optical axis region of the image side surface of the fifth lens is a concave surface, and a circumferential region of the image side surface of the fifth lens is a convex surface; The sixth lens has a positive refractive power, a circumferential area of ​​the object side surface of the sixth lens is a concave surface, an optical axis area of ​​the image side surface of the sixth lens is a convex surface, and a circumferential area of ​​the image side surface of the sixth lens is a convex surface; An optical axis region of the object side surface of the seventh lens is a concave surface, an optical axis region of the image side surface of the seventh lens is a concave surface, and a circumferential region of the image side surface of the seventh lens is a convex surface; The optical imaging lens has only the seven lenses mentioned above, and the first lens has a positive refractive power, the third lens has a negative refractive power, the fourth lens has a positive refractive power, and the seventh lens has a negative refractive power; And satisfy AAG / (G23+G34)≧3.500 and ALT / (T5+G56)≦4.200; Wherein, AAG is the sum of six air gaps from the first lens to the seventh lens on the optical axis, G23 is an air gap from the second lens to the third lens on the optical axis, G34 is an air gap from the third lens to the fourth lens on the optical axis, ALT is the sum of seven lens thicknesses from the first lens to the seventh lens on the optical axis, T5 is a thickness of the fifth lens on the optical axis, and G56 is an air gap from the fifth lens to the sixth lens on the optical axis.

12. The optical imaging lens of claim 5 or 6 or 10 or 11, wherein the optical imaging lens further satisfies the following condition: (G23+T4) / T3≦5.200; wherein T4 is a thickness of the fourth lens on the optical axis, and T3 is a thickness of the third lens on the optical axis.

13. The optical imaging lens as claimed in claim 5 or 6 or 10 or 11, wherein the optical imaging lens further satisfies the following condition: AAG / T1≦4.000; wherein T1 is a thickness of the first lens on the optical axis.

14. The optical imaging lens as claimed in claim 5 or 6 or 10 or 11, wherein the optical imaging lens further satisfies the following condition: (T2+G23) / T7≦2.000; wherein T2 is a thickness of the second lens on the optical axis, and T7 is a thickness of the seventh lens on the optical axis.

15. The optical imaging lens of claim 5 or 6 or 10 or 11, wherein the optical imaging lens further satisfies the following conditional formula: (EFL+G12) / BFL≧4.400; wherein EFL is a system focal length of the optical imaging lens, G12 is an air gap between the first lens and the second lens on the optical axis, and BFL is a distance between the image-side surface of the seventh lens and an imaging plane on the optical axis.

16. The optical imaging lens of claim 5 or 6 or 10 or 11, wherein the optical imaging lens further satisfies the following conditional formula: EFL / (G12+G67)≦5.600; wherein EFL is a system focal length of the optical imaging lens, G12 is an air gap between the first lens and the second lens on the optical axis, and G67 is an air gap between the sixth lens and the seventh lens on the optical axis.

17. The optical imaging lens as claimed in claim 1 or 5 or 6 or 10 or 11, wherein the optical imaging lens further satisfies the following condition: V2+V3+V6≦110.000; wherein V2 is an Abbe number of the second lens, V3 is an Abbe number of the third lens, and V6 is an Abbe number of the sixth lens.

18. The optical imaging lens of claim 1 or 5 or 6 or 10 or 11, wherein the optical imaging lens further satisfies the following condition: ImgH / Fno≧2.500 mm; wherein ImgH is an image height of the optical imaging lens, and Fno is an aperture value of the optical imaging lens.

19. The optical imaging lens of claim 1 or 5 or 6 or 10 or 11, wherein the optical imaging lens further satisfies the following condition: (T3+T4) / T2≧2.800; wherein T3 is a thickness of the third lens on the optical axis, T4 is a thickness of the fourth lens on the optical axis, and T2 is a thickness of the second lens on the optical axis.

Images