Optical imaging lens

Abstract

The present invention discloses an optical imaging lens, comprising a first lens to a seventh lens, each lens having an object side surface and an image side surface. The second lens has a negative refractive power, and a circumferential area of ​​the object side surface of the second lens is a convex surface, a circumferential area of ​​the object side surface of the third lens is a concave surface, the fourth lens has a negative refractive power, and an optical axis area of ​​the object side surface of the fourth lens is a concave surface, an optical axis area of ​​the image side surface of the fifth lens is a concave surface, and an optical axis area of ​​the image side surface of the sixth lens is a convex surface. The first lens has a positive refractive power or the sixth lens has a positive refractive power or the seventh lens has a negative refractive power. The optical imaging lens has only the above seven lenses and satisfies V2+V3+V5≧120.000 and (T1+L4IL7I) / (T2+G23+T3)≧3.000. The optical imaging lens has the characteristics of being light, thin, short, small, having a small aperture value, a large image height, and maintaining good imaging quality at the same time.

Description

Technical Field

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

[0002] In recent years, optical imaging lenses have been evolving. In addition to requiring the lenses to be thin, light, and short, in order to meet more applications, such as being able to shoot smoothly under low light, in addition to designing a small aperture value (Fno) to increase the light flux, the optical imaging lens can also be designed with a large image height to match a larger image sensor to receive imaging light. Under these increasingly stringent conditions, how to design an optical imaging lens that is thin, light, short, has a small aperture value, a large image height, and maintains good imaging quality has always been the development goal of the design. Summary of the invention

[0003] The object of the present invention is to provide an optical imaging lens which is light, thin, short, has a small aperture value, a large image height and maintains good imaging quality.

[0004] To achieve the purpose of the present invention, various embodiments of the present invention provide a seven-piece optical imaging lens. The seven-piece optical imaging lens of the present invention is arranged in sequence on the optical axis from the object side to the image side, with a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens each have an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through.

[0005] In one embodiment of the present invention, the second lens has a negative refractive power, and a circumferential area of ​​the object-side surface of the second lens is a convex surface, a circumferential area of ​​the object-side surface of the third lens is a concave surface, the fourth lens has a negative refractive power, and an optical axis area of ​​the object-side surface of the fourth lens is a concave surface, an optical axis area of ​​the image-side surface of the fifth lens is a concave surface, an optical axis area of ​​the image-side surface of the sixth lens is a convex surface, the first 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 the optical imaging lens has only the above seven lenses, and satisfies V2+V3+V5≧120.000 and (T1+L4IL7I) / (T2+G23+T3)≧3.000.

[0006] In another embodiment of the present invention, the second lens has a negative refractive power, a circumferential area of ​​the object-side surface of the third lens is concave, the fourth lens has a negative refractive power, and an optical axis area of ​​the object-side surface of the fourth lens is concave, an optical axis area of ​​the image-side surface of the fifth lens is concave, an optical axis area of ​​the object-side surface of the seventh lens is concave, the first lens has a positive refractive power or the sixth lens has a positive refractive power or the seventh lens has a negative refractive power, the optical imaging lens consists of only the above seven lenses, and satisfies V2+V3+V5≧120.000 and (T1+L4IL7I) / (T2+G23+T3)≧3.000.

[0007] In another embodiment of the present invention, the second lens has a negative refractive power, a circumferential area of ​​the object-side surface of the third lens is a concave surface, the fourth lens has a negative refractive power, the sixth lens has a positive refractive power and an optical axis area of ​​the image-side surface of the sixth lens is a convex surface, the circumferential area of ​​the object-side surface of the seventh lens is a convex surface, the first lens has a positive refractive power or the seventh lens has a negative refractive power, the optical imaging lens consists of only the above seven lenses, and V2+V3+V5≧120.000 and (T1+L4IL7I) / (T2+G23+T3)≧3.300.

[0008] In the optical imaging lens of the present invention, the embodiment may further selectively satisfy any of the following conditions:

[0009] ImgH / Fno≧3.200 mm;

[0010] (EFL+ImgH) / Fno≧6.500mm;

[0011] V2+V3+V7≧120.000;

[0012] V2+V5+V7≧120.000;

[0013] (G45+G56) / G34≧2.800;

[0014] (G34+G56) / G45≦2.800;

[0015] (T2+G45) / G34≦3.500;

[0016] (T5+G56+T6+G67) / (G12+G45)≧4.800;

[0017] AAG / (T1+G12)≦2.800;

[0018] ALT / (G56+T6+G67)≦2.600;

[0019] (G34+G45+G56) / (T2+G23)≦2.300;

[0020] (T7+BFL) / (T3+G34)≧1.500;

[0021] (G23+T3) / G56≦2.500;

[0022] (T4+T6) / (G12+G45)≧2.000;

[0023] TTL / (T1+G12+T2+G23)≦5.000;

[0024] TL / (T2+T3+T4)≧5.000; and

[0025] EFL / (G12+T2+G45)≧6.900.

[0026] Wherein, T1 is defined as the thickness of the first lens on the optical axis; T2 is defined as the thickness of the second lens on the optical axis; T3 is defined as the thickness of the third lens on the optical axis; T4 is defined as the thickness of the fourth lens on the optical axis; T5 is defined as the thickness of the fifth lens on the optical axis; T6 is defined as the thickness of the sixth lens on the optical axis; T7 is defined as the thickness of the seventh lens on the optical axis; G12 is defined as the air gap between the first lens and the second lens on the optical axis; G23 is defined as the air gap between the second lens and the third lens on the optical axis; G34 is defined as the air gap between the third lens and the fourth lens on the optical axis; G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis; G5 6 is defined as the air gap from the fifth lens to the sixth lens on the optical axis; G67 is defined as the air gap from the sixth lens to the seventh lens on the optical axis; ALT is defined as the sum of the thicknesses of the seven lenses from the first lens to the seventh lens on the optical axis; TL is defined as the distance from the object side of the first lens to the image side of the seventh lens on the optical axis; TTL is defined as the distance from the object side of the first lens to the imaging plane on the optical axis; BFL is defined as the distance from the image side of the seventh lens to the imaging plane on the optical axis; AAG is defined as the sum of the six air gaps from the first lens to the seventh lens on the optical axis; EFL is defined as the effective focal length of the optical imaging lens; ImgH is defined as the image height of the optical imaging lens.

[0027] In addition, V1 is the Abbe coefficient of the first lens 10; V2 is the Abbe coefficient of the second lens 20; V3 is the Abbe coefficient of the third lens 30; V4 is the Abbe coefficient of the fourth lens 40; V5 is the Abbe coefficient of the fifth lens 50; V6 is the Abbe coefficient of the sixth lens 60; and V7 is the Abbe coefficient of the seventh lens 70.

[0028] In the present invention, L4IL7I is further defined as the distance between the image side surface of the fourth lens and the image side surface of the seventh lens on the optical axis.

[0029] The optical imaging lens of the present invention is particularly directed to an optical imaging lens mainly used for photographic electronic devices such as shooting images and recording videos, for example, it can be applied to optical imaging lenses of portable electronic devices such as mobile phones, cameras, tablet computers and personal digital assistants (PDAs). BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figures 1 to 5 It is a schematic diagram of a method for determining the curvature shape of an optical imaging lens of the present invention.

[0031] Figure 6 FIG. 1 is a schematic diagram of a first embodiment of the optical imaging lens of the present invention.

[0032] Figure 7 FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the first embodiment on the imaging plane.

[0033] Figure 8 FIG. 2 is a schematic diagram of a second embodiment of the optical imaging lens of the present invention.

[0034] Fig. 9 FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the second embodiment on the imaging plane.

[0035] Fig.10 It is a schematic diagram of a third embodiment of the optical imaging lens of the present invention.

[0036] Fig.11 FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the third embodiment on the imaging plane.

[0037] Fig.12 It is a schematic diagram of a fourth embodiment of the optical imaging lens of the present invention.

[0038] Fig.13 FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the fourth embodiment on the imaging plane.

[0039] Fig.14 It is a schematic diagram of a fifth embodiment of the optical imaging lens of the present invention.

[0040] Fig.15 FIG. 5 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams on the imaging plane of the optical imaging lens of the fifth embodiment.

[0041] Fig.16 It is a schematic diagram of a sixth embodiment of the optical imaging lens of the present invention.

[0042] Fig.17FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the sixth embodiment on the imaging plane.

[0043] Fig.18 It is a schematic diagram of a seventh embodiment of the optical imaging lens of the present invention.

[0044] Fig.19 FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the seventh embodiment on the imaging plane.

[0045] Fig. 20 It is a schematic diagram of an eighth embodiment of the optical imaging lens of the present invention.

[0046] Fig.21 FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the eighth embodiment on the imaging plane.

[0047] Fig. 22 It is a schematic diagram of a ninth embodiment of the optical imaging lens of the present invention.

[0048] Fig.23 FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the ninth embodiment on the imaging plane.

[0049] Fig.24 2 is a schematic diagram of a tenth embodiment of the optical imaging lens of the present invention.

[0050] Fig.25 FIG. 1 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the tenth embodiment on the imaging plane. FIG.

[0051] Fig.26 It is a detailed optical data table diagram of the first embodiment.

[0052] Fig. 27 It is a table diagram of detailed aspheric surface data of the first embodiment.

[0053] Fig.28 It is a detailed optical data table diagram of the second embodiment.

[0054] Fig.29 It is a table diagram of detailed aspheric surface data of the second embodiment.

[0055] Fig.30 It is a detailed optical data table diagram of the third embodiment.

[0056] Fig.31 It is a detailed aspheric surface data table diagram of the third embodiment.

[0057] Fig.32 It is a detailed optical data table diagram of the fourth embodiment.

[0058] Fig.33It is a table diagram of detailed aspheric surface data of the fourth embodiment.

[0059] Fig.34 It is a detailed optical data table diagram of the fifth embodiment.

[0060] Fig.35 It is a detailed aspheric surface data table diagram of the fifth embodiment.

[0061] Fig.36 It is a detailed optical data table diagram of the sixth embodiment.

[0062] Fig.37 It is a table diagram of detailed aspheric surface data of the sixth embodiment.

[0063] Fig.38 It is a detailed optical data table diagram of the seventh embodiment.

[0064] Fig.39 It is a table diagram of detailed aspheric surface data of the seventh embodiment.

[0065] Fig.40 It is a detailed optical data table diagram of the eighth embodiment.

[0066] Fig.41 It is a detailed aspheric surface data table diagram of the eighth embodiment.

[0067] Fig.42 It is a detailed optical data table diagram of the ninth embodiment.

[0068] Fig.43 It is a table diagram of detailed aspheric surface data of the ninth embodiment.

[0069] Fig.44 It is a detailed optical data table diagram of the tenth embodiment.

[0070] Fig.45 It is a table diagram of detailed aspheric surface data of the tenth embodiment.

[0071] Fig.46 It is a table diagram of important parameters of each embodiment.

[0072] Fig.47 It is a table diagram of important parameters of each embodiment. DETAILED DESCRIPTION

[0073] Before describing the present invention in detail, the following are some symbols in the accompanying drawings: 1: optical imaging lens; 2: aperture; 3: filter; 4: imaging surface; 11, 21, 31, 41, 51, 61, 71, 110, 410, 510: object side; 12, 22, 32, 42, 52, 62, 72, 120, 320: image side; 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, 73, 76, Z1: optical axis area; 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, 74, 77, Z2: Circumferential area; 10: first lens; 20: second lens; 30: third lens; 40: fourth lens; 50: fifth lens; 60: sixth lens; 70: seventh lens; 100, 200, 300, 400, 500: lenses; 130: assembly part; 211, 212: parallel light rays; 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: main light ray; Lm: edge light ray; EL: extension line; Z3: relay area; M: intersection point; R: intersection point.

[0074] 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.

[0075] 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 1 The 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.

[0076] 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 1As shown in the example, the first center point CP1 is located on the object side 110 of the lens 100, and the second center point CP2 is located on the image side 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 with the lens surface. All conversion points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the surface of the lens 100 may have no conversion points or at least one conversion point. 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).

[0077] When the lens surface has at least one transition point, 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 radially outward from the transition point farthest from the optical axis I (the Nth transition point) 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. When the lens surface does not have a transition point, 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.

[0078] 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.

[0079] 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 element (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.

[0080] 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 2As 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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 5 The 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.

[0088] like Figure 6 As shown, the optical imaging lens 1 of the present invention is mainly composed of seven lenses along the optical axis I, from the object side A1 where the object (not shown) is placed to the image side A2 where the image is formed, including an aperture 2, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, a sixth lens 60, a seventh lens 70 and an image plane 4 in sequence. Generally speaking, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60 and the seventh lens 70 can all be made of transparent plastic materials, but the present invention is not limited thereto. Each lens has an appropriate refractive power. In the optical imaging lens 1 of the present invention, there are only seven lenses with refractive power, namely, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60 and the seventh lens 70. The optical axis I is the optical axis of the entire optical imaging lens 1, so the optical axis of each lens is the same as the optical axis of the optical imaging lens 1.

[0089] In addition, the aperture stop 2 of the optical imaging lens 1 is set at an appropriate position. Figure 6 In the embodiment, the aperture 2 is disposed on the side of the first lens 10 facing the object side A1. When the light (not shown) emitted by the object to be photographed (not shown) located on the object side A1 enters the optical imaging lens 1 of the present invention, it will sequentially pass through the aperture 2, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60, the seventh lens 70 and the filter 3, and then will be focused on the imaging plane 4 of the image side A2 to form a clear image. In each embodiment of the present invention, the filter 3 is disposed between the seventh lens 70 and the imaging plane 4, and it can be a filter with various suitable functions, such as an infrared cut-off filter, which is used to prevent infrared rays in the imaging light from being transmitted to the imaging plane 4 and affecting the imaging quality.

[0090] Each lens in the optical imaging lens 1 of the present invention has an object-side surface facing the object side A1 and allowing imaging light to pass through, and an image-side surface facing the image side A2 and allowing imaging light to pass through. In addition, each lens in the optical imaging lens 1 of the present invention also has an optical axis region and a circumferential region. For example, the first lens 10 has an object-side surface 11 and an image-side surface 12; the second lens 20 has an object-side surface 21 and an image-side surface 22; the third lens 30 has an object-side surface 31 and an image-side surface 32; the fourth lens 40 has an object-side surface 41 and an image-side surface 42; the fifth lens 50 has an object-side surface 51 and an image-side surface 52; the sixth lens 60 has an object-side surface 61 and an image-side surface 62; and the seventh lens 70 has an object-side surface 71 and an image-side surface 72. Each object-side surface and image-side surface has an optical axis region and a circumferential region, respectively.

[0091] Each lens in the optical imaging lens 1 of the present invention also has a thickness T on the optical axis I. For example, the first lens 10 has a first lens thickness T1, the second lens 20 has a second lens thickness T2, the third lens 30 has a third lens thickness T3, the fourth lens 40 has a fourth lens thickness T4, the fifth lens 50 has a fifth lens thickness T5, the sixth lens 60 has a sixth lens thickness T6, and the seventh lens 70 has a seventh lens thickness T7. Therefore, the sum of the thicknesses of the lenses in the optical imaging lens 1 of the present invention on the optical axis I is called ALT. That is, ALT=T1+T2+T3+T4+T5+T6+T7.

[0092] In addition, in the optical imaging lens 1 of the present invention, there are air gaps between the lenses on the optical axis I. For example, the air gap from the first lens 10 to the second lens 20 is called G12, the air gap from the second lens 20 to the third lens 30 is called G23, the air gap from the third lens 30 to the fourth lens 40 is called G34, the air gap from the fourth lens 40 to the fifth lens 50 is called G45, the air gap from the fifth lens 50 to the sixth lens 60 is called G56, and the air gap from the sixth lens 60 to the seventh lens 70 is called G67. Therefore, the sum of the six air gaps from the first lens 10 to the seventh lens 70 on the optical axis I is called AAG. That is, AAG=G12+G23+G34+G45+G56+G67.

[0093] In addition, the distance between the object side surface 11 of the first lens 10 and the imaging surface 4 on the optical axis I is the system length TTL of the optical imaging lens 1. The effective focal length of the optical imaging lens 1 is EFL, and the distance between the object side surface 11 of the first lens 10 and the image side surface 72 of the seventh lens 70 on the optical axis I is TL. The half field of view of the optical imaging lens 1 is HFOV, which is half of the maximum field of view, the image height of the optical imaging lens 1 is ImgH (image height), and the aperture value of the optical imaging lens 1 is Fno.

[0094] When the filter 3 is arranged between the seventh lens 70 and the imaging plane 4, G7F represents the air gap from the seventh lens 70 to the filter 3 on the optical axis I, TF represents the thickness of the filter 3 on the optical axis I, GFP represents the air gap from the filter 3 to the imaging plane 4 on the optical axis I, and BFL is the back focal length of the optical imaging lens 1, that is, the distance from the image side surface 72 of the seventh lens 70 to the imaging plane 4 on the optical axis I, that is, BFL=G7F+TF+GFP.

[0095] In addition, it is further defined that: f1 is the focal length of the first lens 10; f2 is the focal length of the second lens 20; f3 is the focal length of the third lens 30; f4 is the focal length of the fourth lens 40; f5 is the focal length of the fifth lens 50; f6 is the focal length of the sixth lens 60; f7 is the focal length of the seventh lens 70; n1 is the refractive index of the first lens 10; n2 is the refractive index of the second lens 20; n3 is the refractive index of the third lens 30; n4 is the refractive index of the fourth lens 40; n5 is the refractive index of the fifth lens 50; n6 is the refractive index of the sixth lens 60; n7 is the refractive index of the seventh lens 70; V1 is the Abbe coefficient of the first lens 10; V2 is the Abbe coefficient of the second lens 20; V3 is the Abbe coefficient of the third lens 30; V4 is the Abbe coefficient of the fourth lens 40; V5 is the Abbe coefficient of the fifth lens 50; V6 is the Abbe coefficient of the sixth lens 60; and V7 is the Abbe coefficient of the seventh lens 70.

[0096] In the present invention, it is further defined that: L4IL7I is the distance from the image side surface 42 of the fourth lens 40 to the image side surface 72 of the seventh lens 70 on the optical axis I, that is, G45+T5+G56+T6+G67+T7.

[0097] First embodiment

[0098] See also Figure 6 , illustrating the first embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration (longitudinal spherical aberration) on the imaging plane 4 of the first embodiment, please refer to Figure 7 A. For sagittal field curvature, please refer to Figure 7 For B and tangential field curvature, please refer to Figure 7 For C and distortion aberration, please refer to Figure 7 The Y axis of each spherical aberration diagram in all embodiments represents the field of view, and the highest point thereof is 1.0. The Y axis of each aberration diagram and distortion diagram in the embodiments represents the image height. The system image height (Image Height, ImgH) of the first embodiment is 5.700 mm.

[0099] The optical imaging lens 1 of the first embodiment is mainly composed of seven lenses with refractive powers, an aperture 2, and an imaging surface 4. The aperture 2 of the first embodiment is disposed on a side of the first lens 10 facing the object side A1.

[0100] The first lens 10 has a positive refractive power. The optical axis region 13 of the object side surface 11 of the first lens 10 is a convex surface and the circumferential region 14 thereof is a convex surface, and the optical axis region 16 of the image side surface 12 of the first lens 10 is a concave surface and the circumferential region 17 thereof is a concave surface. Both the object side surface 11 and the image side surface 12 of the first lens 10 are aspherical surfaces, but the present invention is not limited thereto.

[0101] The second lens 20 has a negative refractive power. The optical axis region 23 of the object side surface 21 of the second lens 20 is a convex surface and the circumferential region 24 thereof is a convex surface, and the optical axis region 26 of the image side surface 22 of the second lens 20 is a concave surface and the circumferential region 27 thereof is a concave surface. Both the object side surface 21 and the image side surface 22 of the second lens 20 are aspherical surfaces, but the present invention is not limited thereto.

[0102] The third lens 30 has a positive refractive power, an optical axis region 33 of an object side surface 31 of the third lens 30 is a convex surface and a circumferential region 34 thereof is a concave surface, an optical axis region 36 of an image side surface 32 of the third lens 30 is a concave surface and a circumferential region 37 thereof is a convex surface. Both the object side surface 31 and the image side surface 32 of the third lens 30 are aspherical surfaces, but the present invention is not limited thereto.

[0103] The fourth lens element 40 has a negative refractive power, an optical axis region 43 of an object-side surface 41 of the fourth lens element 40 is a concave surface and a circumferential region 44 thereof is a concave surface, an optical axis region 46 of an image-side surface 42 of the fourth lens element 40 is a convex surface and a circumferential region 47 thereof is a convex surface. Both the object-side surface 41 and the image-side surface 42 of the fourth lens element 40 are aspherical surfaces, but the present invention is not limited thereto.

[0104] The fifth lens element 50 has a negative refractive power, an optical axis region 53 of an object-side surface 51 of the fifth lens element 50 is a convex surface and a circumferential region 54 thereof is a concave surface, an optical axis region 56 of an image-side surface 52 of the fifth lens element 50 is a concave surface and a circumferential region 57 thereof is a convex surface. Both the object-side surface 51 and the image-side surface 52 of the fifth lens element 50 are aspherical surfaces, but the present invention is not limited thereto.

[0105] The sixth lens 60 has a positive refractive power, an optical axis region 63 of an object side surface 61 of the sixth lens 60 is a convex surface and a circumferential region 64 thereof is a concave surface, an optical axis region 66 of an image side surface 62 of the sixth lens 60 is a convex surface and a circumferential region 67 thereof is a convex surface. Both the object side surface 61 and the image side surface 62 of the sixth lens 60 are aspherical surfaces, but the present invention is not limited thereto.

[0106] The seventh lens element 70 has a negative refractive power, an optical axis region 73 of an object-side surface 71 of the seventh lens element 70 is a concave surface and a circumferential region 74 thereof is a convex surface, an optical axis region 76 of an image-side surface 72 of the seventh lens element 70 is a concave surface and a circumferential region 77 thereof is a convex surface. Both the object-side surface 71 and the image-side surface 72 of the seventh lens element 70 are aspherical surfaces, but the present invention is not limited thereto.

[0107] In the optical imaging lens 1 of the present invention, from the first lens 10 to the seventh lens 70, all of the object-side surfaces 11 / 21 / 31 / 41 / 51 / 61 / 71 and the image-side surfaces 12 / 22 / 32 / 42 / 52 / 62 / 72, a total of fourteen surfaces, are aspherical surfaces, but not limited thereto. If they are aspherical surfaces, they are defined by the following formulas:

[0108]

[0109] in:

[0110] Y represents the vertical distance between a point on the aspheric surface and the optical axis I; Z represents the depth of the aspheric surface (the vertical distance between a point on the aspheric surface that is Y away from the optical axis I and the tangent plane that is tangent to the vertex on the aspheric optical axis I); R represents the radius of curvature of the lens surface near the optical axis I;

[0111] K is the conic constant; a 2i is the 2i-th order aspheric coefficient.

[0112] First Embodiment The optical data of the optical imaging lens system are as follows: Fig.26 As shown, the aspheric data is as follows Fig. 27 As shown. In the optical imaging lens system of the following embodiments, the aperture value (f-number) of the overall optical imaging lens is Fno, the effective focal length is (EFL), and the half field of view (Half Field of View, referred to as HFOV) is half of the maximum field of view (Field of View) in the overall optical imaging lens, wherein the image height, radius of curvature, thickness and focal length of the optical imaging lens are all in millimeters (mm). In this embodiment, TTL = 9.322 mm; EFL = 7.938 mm; HFOV = 36.015 degrees; ImgH = 5.700 mm; Fno = 1.781.

[0113] Second embodiment

[0114] See also Figure 8 , illustrating the second embodiment of the optical imaging lens 1 of the present invention. Please note that starting from the second embodiment, in order to simplify and clearly express the diagram, only the optical axis area and the circumference area of ​​each lens that are different from the first embodiment are specially marked on the figure, while the optical axis area and the circumference area of ​​the other lens surfaces that are the same as the first embodiment, such as concave or convex surfaces, are not marked separately. For the longitudinal spherical aberration of the second embodiment on the imaging surface 4, please refer to Fig. 9 For A and sagittal field curvature aberration, please refer to Fig. 9 For B and field curvature aberration in the meridian direction, please refer to Fig. 9 For C and distortion, please refer to Fig. 9 The design of the second embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens asphericity coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the fifth lens 50 has a positive refractive power.

[0115] The detailed optical data of the second embodiment are as follows Fig.28 As shown, the aspheric data is as follows Fig.29 As shown. In this embodiment, TTL = 8.400 mm; EFL = 6.642 mm; HFOV = 39.451 degrees; ImgH = 5.700 mm; Fno = 1.500. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. The half field of view HFOV of this embodiment is larger than the half field of view HFOV of the first embodiment; 3. The longitudinal spherical aberration of this embodiment is smaller than the longitudinal spherical aberration of the first embodiment.

[0116] Third embodiment

[0117] See also Fig.10 , illustrating the third embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration of the third embodiment on the imaging plane 4, please refer to Fig.11 For A and sagittal field curvature aberration, please refer to Fig.11 For B and field curvature aberration in the meridian direction, please refer to Fig.11 For C and distortion, please refer to Fig.11 The design of the third embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the fifth lens 50 has a positive refractive power.

[0118] The detailed optical data of the third embodiment are as follows Fig.30 As shown, the aspheric data is as follows Fig.31As shown, in this embodiment, TTL = 8.430 mm; EFL = 6.568 mm; HFOV = 39.870 degrees; ImgH = 5.700 mm; Fno = 1.500. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. The half field angle HFOV of this embodiment is larger than the half field angle HFOV of the first embodiment; 3. The field curvature aberration in the sagittal direction of this embodiment is smaller than that of the first embodiment; 4. The distortion aberration of this embodiment is smaller than that of the first embodiment.

[0119] Fourth embodiment

[0120] See also Fig.12 , illustrating the fourth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration of the fourth embodiment on the imaging plane 4, please refer to Fig.13 For A and sagittal field curvature aberration, please refer to Fig.13 For B and field curvature aberration in the meridian direction, please refer to Fig.13 For C and distortion, please refer to Fig.13 The design of the fourth embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens asphericity coefficient or back focal length and other related parameters are different.

[0121] The detailed optical data of the fourth embodiment are as follows Fig.32 As shown, the aspheric data is as follows Fig.33 As shown. In this embodiment, TTL = 9.915 mm; EFL = 8.746 mm; HFOV = 37.782 degrees; ImgH = 6.700 mm; Fno = 2.036. In particular: 1. The half field angle HFOV of this embodiment is larger than the half field angle HFOV of the first embodiment; 2. The field curvature aberration in the sagittal direction of this embodiment is smaller than the field curvature aberration in the sagittal direction of the first embodiment; 3. The distortion aberration of this embodiment is smaller than the distortion aberration of the first embodiment.

[0122] Fifth embodiment

[0123] See also Fig.14 , illustrating the fifth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration of the fifth embodiment on the imaging plane 4, please refer to Fig.15 For A and sagittal field curvature aberration, please refer to Fig.15 For B and field curvature aberration in the meridian direction, please refer to Fig.15 For C and distortion, please refer to Fig.15 The design of the fifth embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens asphericity coefficient or back focal length and other related parameters are different.

[0124] The detailed optical data of the fifth embodiment are as follows Fig.34 As shown, the aspheric data is as follows Fig.35 As shown, in this embodiment, TTL = 9.386 mm; EFL = 7.861 mm; HFOV = 35.573 degrees; ImgH = 5.700 mm; Fno = 1.764. In particular: 1. The longitudinal spherical aberration of this embodiment is smaller than that of the first embodiment; 2. The field curvature aberration in the sagittal direction of this embodiment is smaller than that of the first embodiment; 3. The distortion aberration of this embodiment is smaller than that of the first embodiment.

[0125] Sixth embodiment

[0126] See also Fig.16 , illustrating the sixth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration of the sixth embodiment on the imaging plane 4, please refer to Fig.17 For A and sagittal field curvature aberration, please refer to Fig.17 For B and field curvature aberration in the meridian direction, please refer to Fig.17 For C and distortion, please refer to Fig.17 The design of the sixth embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens asphericity coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the fifth lens 50 has a positive refractive power.

[0127] The detailed optical data of the sixth embodiment are as follows Fig.36 As shown, the aspheric data is as follows Fig.37 As shown, in this embodiment, TTL = 8.983 mm; EFL = 7.227 mm; HFOV = 41.673 degrees; ImgH = 6.700 mm; Fno = 1.700. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. The half field angle HFOV of this embodiment is larger than the half field angle HFOV of the first embodiment; 3. The longitudinal spherical aberration of this embodiment is smaller than the longitudinal spherical aberration of the first embodiment; 4. The field curvature aberration in the sagittal direction of this embodiment is smaller than the field curvature aberration in the sagittal direction of the first embodiment.

[0128] Seventh embodiment

[0129] See also Fig.18 , illustrating the seventh embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration of the seventh embodiment on the imaging plane 4, please refer to Fig.19 For A and sagittal field curvature aberration, please refer to Fig.19 For B and field curvature aberration in the meridian direction, please refer to Fig.19 For C and distortion, please refer to Fig.19The design of the seventh embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens asphericity coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the fifth lens 50 has a positive refractive power.

[0130] The detailed optical data of the seventh embodiment are as follows Fig.38 As shown, the aspheric data is as follows Fig.39 As shown, in this embodiment, TTL = 8.317 mm; EFL = 6.559 mm; HFOV = 40.022 degrees; ImgH = 5.700 mm; Fno = 1.500. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. The half field of view HFOV of this embodiment is larger than the half field of view HFOV of the first embodiment; 3. The distortion aberration of this embodiment is smaller than the distortion aberration of the first embodiment.

[0131] Eighth embodiment

[0132] See also Fig. 20 , illustrating the eighth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration of the eighth embodiment on the imaging plane 4, please refer to Fig.21 For A and sagittal field curvature aberration, please refer to Fig.21 For B and field curvature aberration in the meridian direction, please refer to Fig.21 For C and distortion, please refer to Fig.21 The design of the eighth embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens asphericity coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the fifth lens 50 has a positive refractive power.

[0133] The detailed optical data of the eighth embodiment are as follows Fig.40 As shown, the aspheric data is as follows Fig.41 As shown, in this embodiment, TTL = 8.977 mm; EFL = 7.227 mm; HFOV = 41.727 degrees; ImgH = 6.700 mm; Fno = 1.700. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. The half field angle HFOV of this embodiment is larger than the half field angle HFOV of the first embodiment; 3. The longitudinal spherical aberration of this embodiment is smaller than the longitudinal spherical aberration of the first embodiment; 4. The field curvature aberration in the sagittal direction of this embodiment is smaller than the field curvature aberration in the sagittal direction of the first embodiment.

[0134] Ninth embodiment

[0135] See also Fig. 22 , illustrating the ninth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration of the ninth embodiment on the imaging plane 4, please refer to Fig.23For A and sagittal field curvature aberration, please refer to Fig.23 For B and field curvature aberration in the meridian direction, please refer to Fig.23 For C and distortion, please refer to Fig.23 The design of the ninth embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens asphericity coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the fifth lens 50 has a positive refractive power.

[0136] The detailed optical data of the ninth embodiment are as follows Fig.42 As shown, the aspheric data is as follows Fig.43 As shown, in this embodiment, TTL = 8.469 mm; EFL = 6.633 mm; HFOV = 39.545 degrees; ImgH = 5.700 mm; Fno = 1.500. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. The half field angle HFOV of this embodiment is larger than the half field angle HFOV of the first embodiment; 3. The longitudinal spherical aberration of this embodiment is smaller than the longitudinal spherical aberration of the first embodiment; 4. The field curvature aberration in the sagittal direction of this embodiment is smaller than the field curvature aberration in the sagittal direction of the first embodiment.

[0137] Tenth embodiment

[0138] See also Fig.24 , illustrating the ninth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 of the tenth embodiment, please refer to Fig.25 For A and sagittal field curvature aberration, please refer to Fig.25 For B and field curvature aberration in the meridian direction, please refer to Fig.25 For C and distortion, please refer to Fig.25 The design of the tenth embodiment is similar to that of the first embodiment, except that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the third lens 30 has a negative refractive power, the optical axis region 33 of the object side surface 31 of the third lens 30 is a concave surface, the optical axis region 36 of the image side surface 32 of the third lens 30 is a convex surface, and the fifth lens 50 has a positive refractive power.

[0139] The detailed optical data of the tenth embodiment are as follows Fig.44 As shown, the aspheric data is as follows Fig.45 As shown, in this embodiment, TTL = 8.651 mm; EFL = 6.911 mm; HFOV = 38.487 degrees; ImgH = 5.700 mm; Fno = 1.500. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. The half field of view HFOV of this embodiment is larger than the half field of view HFOV of the first embodiment.

[0140] In addition, the important parameters of each embodiment are summarized in Fig.46 and Fig.47 middle.

[0141] Each embodiment of the present invention provides an optical imaging lens with good imaging quality. For example, a concave-convex design that satisfies the following lens surface shape can effectively reduce field curvature and distortion rate, has the characteristics of optimizing the imaging quality of the optical imaging lens system, and can achieve corresponding effects:

[0142] 1. The embodiment of the present invention adopts the design of the refractive power and surface shape of the lens. For example, if the second lens has a negative refractive power and the circumferential area of ​​the object side surface of the third lens is a concave surface, the path of the light after passing through the first lens can be effectively corrected. If the circumferential area of ​​the object side surface of the second lens is a convex surface, the optical axis area of ​​the object side surface of the fourth lens is a concave surface, the fourth lens has a negative refractive power, the optical axis area of ​​the image side surface of the fifth lens is a concave surface, and the optical axis area of ​​the image side surface of the sixth lens is a convex surface, and the condition of V2+V3+V5≧120.000 is satisfied, the shapes of the fifth lens and the sixth lens can be made smoother. And effectively reduce the sensitivity of MTF (modulation transfer function) and thus control chromatic aberration, the preferred range is 120.000≦V2+V3+V5≦135.000, when the condition of (T1+L4IL7I) / (T2+G23+T3)≧3.000 is met, the advantages of reduced volume, small aperture value and good imaging quality can be obtained by allocating appropriate distances of thickness and air gap while designing an optical imaging lens with a large image height, the preferred range is 3.000≦(T1+L4IL7I) / (T2+G23+T3)≦5.500. Furthermore, if the first lens has a positive refractive power, the sixth lens has a positive refractive power, or the seventh lens has a negative refractive power, it is more helpful to reduce the system aberration and distortion rate of the optical imaging lens.

[0143] 2. The embodiment of the present invention adopts the design of the refractive power and surface shape of the lens. For example, if the second lens has a negative refractive power and the circumferential area of ​​the object side surface of the third lens is a concave surface, the path of the light after passing through the first lens can be effectively corrected. If the optical axis area of ​​the object side surface of the fourth lens is a concave surface, the fourth lens has a negative refractive power, the optical axis area of ​​the image side surface of the fifth lens is a concave surface, and the optical axis area of ​​the object side surface of the seventh lens is a concave surface, and the condition of V2+V3+V5≧120.000 is satisfied, the shapes of the fifth lens and the sixth lens can be made smoother and the MTF can be effectively reduced. The sensitivity of the (modulation transfer function) is used to control the chromatic aberration. The preferred range is 120.000≦V2+V3+V5≦135.000. When the condition of (T1+L4IL7I) / (T2+G23+T3)≧3.000 is met, the thickness and the air gap can be appropriately allocated to obtain the advantages of reduced volume, small aperture value and good imaging quality while designing an optical imaging lens with a large image height. The preferred range is 3.000≦(T1+L4IL7I) / (T2+G23+T3)≦5.500. Furthermore, if the first lens has a positive refractive power, the sixth lens has a positive refractive power, or the seventh lens has a negative refractive power, it is more helpful to reduce the system aberration and distortion rate of the optical imaging lens.

[0144] 3. The embodiment of the present invention adopts the design of the refractive power and surface shape of the lens. For example, if the second lens has a negative refractive power and the circumferential area of ​​the object side surface of the third lens is a concave surface, the path of the light after passing through the first lens can be effectively corrected. If the optical axis area of ​​the object side surface of the second lens is a convex surface, the optical axis area of ​​the image side surface of the sixth lens is a convex surface, and the circumferential area of ​​the object side surface of the seventh lens is a convex surface, and the condition of V2+V3+V5≧120.000 is satisfied, the shapes of the fifth lens and the sixth lens can be made smoother and the MTF (Modulation Transfer Function) can be effectively reduced. The sensitivity of the optical imaging function) is used to control the chromatic aberration. The optimal range is 120.000≦V2+V3+V5≦135.000. When the condition of (T1+L4IL7I) / (T2+G23+T3)≧3.300 is met, the advantages of reduced size, small aperture value and good imaging quality can be obtained while designing an optical imaging lens with a large image height by allocating appropriate distances of thickness and air gap. The optimal range is 3.300≦(T1+L4IL7I) / (T2+G23+T3)≦5.500. In addition, when (T1+L4IL7I) / (T2+G23+T3)≧3.300 is compared with the condition of (T1+L4IL7I) / (T2+G23+T3)≧3.000, the distance from the object side of the second lens to the image side of the third lens on the optical axis can be designed to be a little larger, which helps to make the turning of light smoother and improve the manufacturing yield.

[0145] 4. The embodiment of the present invention adopts the design of the refractive power and surface shape of the lens. For example, if the second lens has a negative refractive power and the circumferential area of ​​the object side surface of the third lens is a concave surface, the path of the light after passing through the first lens can be effectively corrected. If the fourth lens has a negative refractive power, the sixth lens has a positive refractive power, the optical axis area of ​​the image side surface of the sixth lens is a convex surface, and the circumferential area of ​​the object side surface of the seventh lens is a convex surface, and the condition of V2+V3+V5≧120.000 is satisfied, the shapes of the fifth lens and the sixth lens can be made smoother and the MTF (modulation factor) can be effectively reduced. The sensitivity of the optical transfer function (ATF) is used to control the chromatic aberration. The optimal range is 120.000≦V2+V3+V5≦135.000. When the condition of (T1+L4IL7I) / (T2+G23+T3)≧3.300 is met, the advantages of reduced size, small aperture value and good imaging quality can be obtained while designing an optical imaging lens with a large image height by allocating appropriate thickness and air gap distances. The optimal range is 3.300≦(T1+L4IL7I) / (T2+G23+T3)≦5.500. In addition, when (T1+L4IL7I) / (T2+G23+T3)≧3.300 is compared to the condition of (T1+L4IL7I) / (T2+G23+T3)≧3.000, the distance on the optical axis from the object side of the second lens to the image side of the third lens can be designed to be a little larger, which helps to make the light transition smoother and improve the manufacturing yield. Furthermore, if the first lens has a positive refractive power or the seventh lens has a negative refractive power, it is more helpful to reduce the system aberration and distortion rate of the optical imaging lens.

[0146] 5. In the embodiment of the present invention, at least one of the fifth lens, the sixth lens and the seventh lens has a negative refractive power, which is helpful for correcting the optical path, reducing the system aberration and distortion rate of the optical imaging lens, and expanding the image height.

[0147] 6. In the embodiment of the present invention, the first lens has a positive refractive power, so that the light can converge smoothly after passing through the first lens, and one of the following combinations is combined to make the light bend smoothly when entering the sixth lens and the seventh lens to obtain a larger image height:

[0148] (a) the refractive index of one of the fifth lens element and the seventh lens element is of opposite sign to the refractive index of the sixth lens element;

[0149] (b) The refractive power of the seventh lens and the sixth lens have opposite signs;

[0150] (c) The fifth lens has positive refractive power or the sixth lens has positive refractive power.

[0151] 7. In the embodiment of the present invention, at least one of the third lens, the sixth lens and the seventh lens has a positive refractive power, which is helpful for correcting the optical path and reducing the system aberration and distortion rate of the optical imaging lens.

[0152] 8. The embodiment of the present invention can also effectively increase the image height and the amount of light transmitted by satisfying ImgH / Fno≧3.200 mm or (EFL+ImgH) / Fno≧6.500 mm. The preferred range is 3.200≦ImgH / Fno≦4.000, 6.500≦(EFL+ImgH) / Fno≦8.500.

[0153] 9. The embodiment of the present invention can also reduce chromatic aberration and control the refraction angle of light to obtain better imaging quality by selecting appropriate materials to meet the conditions of V2+V3+V7≧120.000 or V2+V5+V7≧120.000. The preferred range is 120.000≦V2+V3+V7≦150.000 and 120.000≦V2+V5+V7≦150.000.

[0154] 10. In order to shorten the length of the optical imaging lens system, the air gap between lenses or the thickness of the lenses can be appropriately adjusted. However, the difficulty of manufacturing and the need to ensure the image quality must also be considered. Therefore, if the numerical limits of the conditional formula in Table 1 below are met, a better configuration can be achieved.

[0155] Table 1 Parameters

[0156] Conditional expression Optimal range (G45+G56) / G34≧2.800 2.800≦(G45+G56) / G34≦5.100 (G34+G56) / G45≦2.800 1.500≦(G34+G56) / G45≦2.800 (T2+G45) / G34≦3.500 2.100≦(T2+G45) / G34≦3.500 (T5+G56+T6+G67) / (G12+G45)≧4.800 4.800≦(T5+G56+T6+G67) / (G12+G45)≦6.600 AAG / (T1+G12)≦2.800 1.500≦AAG / (T1+G12)≦2.800 ALT / (G56+T6+G67)≦2.600 1.500≦ALT / (G56+T6+G67)≦2.600 (G34+G45+G56) / (T2+G23)≦2.300 1.000≦(G34+G45+G56) / (T2+G23)≦2.300 (T7+BFL) / (T3+G34)≧1.500 1.500≦(T7+BFL) / (T3+G34)≦3.500 (G23+T3) / G56≦2.500 1.000≦(G23+T3) / G56≦2.500 (T4+T6) / (G12+G45)≧2.000 2.000≦(T4+T6) / (G12+G45)≦3.300 TTL / (T1+G12+T2+G23)≦5.000 3.500≦TTL / (T1+G12+T2+G23)≦5.000 TL / (T2+T3+T4)≧5.000 5.000≦TL / (T2+T3+T4)≦6.500 EFL / (G12+T2+G45)≧6.900 6.900≦EFL / (G12+T2+G45)≦8.500

[0157] The off-axis light rays of the three representative wavelengths at different heights of each embodiment of the present invention are all concentrated near the imaging point. From the deflection amplitude of each curve, it can be seen that the deviation of the imaging point of the off-axis light rays at different heights is controlled and has good spherical aberration, aberration, and distortion suppression capabilities. Further referring to the imaging quality data, the distances between the three representative wavelengths are also quite close, indicating that the embodiment of the present invention has good concentration of light rays of different wavelengths under various conditions and has excellent dispersion suppression capabilities. Therefore, it can be seen from the above that the embodiment of the present invention has good optical performance.

[0158] In addition, any combination of parameters of the embodiment may be selected to increase lens restrictions, so as to facilitate the lens design of the same structure of the present invention.

[0159] In view of the unpredictability of optical system design, under the framework of the present invention, meeting the above conditions can better enable the present invention to increase image height, shorten system length, improve imaging quality, or improve assembly yield to improve the shortcomings of the prior art. The lens of the embodiment of the present invention uses plastic material to reduce the weight of the lens and save costs.

[0160] The exemplary limiting relationships listed above can also be arbitrarily and 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.

[0161] The contents disclosed in each embodiment of the present invention include but are not limited to optical parameters such as focal length, lens thickness, and Abbe coefficient. For example, the present invention discloses an optical parameter A and an optical parameter B in each embodiment, wherein the ranges covered by these optical parameters, the comparison relationship between the optical parameters, and the conditional ranges covered by multiple embodiments are specifically explained as follows:

[0162] (1) The range covered by the optical parameter, for example: α2≦A≦α1 or β2≦B≦β1, α1 is the maximum value of the optical parameter A in multiple embodiments, α2 is the minimum value of the optical parameter A in multiple embodiments, β1 is the maximum value of the optical parameter B in multiple embodiments, and β2 is the minimum value of the optical parameter B in multiple embodiments.

[0163] (2) The comparative relationship between optical parameters, for example: A is greater than B or A is less than B.

[0164] (3) The conditional range covered by multiple embodiments, specifically, the combination relationship or proportional relationship obtained by possible calculation of multiple optical parameters of the same embodiment, these relationships are defined as E. E can be, for example: A+B or AB or A / B or A*B or (A*B) 1 / 2 , and E satisfies the conditional formula E≦γ1 or E≧γ2 or γ2≦E≦γ1, γ1 and γ2 are the values ​​obtained by calculating the optical parameters A and the optical parameters B of the same embodiment, and γ1 is the maximum value among multiple embodiments of the present invention, and γ2 is the minimum value among multiple embodiments of the present invention.

[0165] The ranges covered by the above optical parameters, the comparison relationship between the optical parameters, and the maximum and minimum values ​​of the conditional expressions, as well as the numerical ranges within the maximum and minimum values, are all features that can be implemented by the present invention and are within the scope disclosed by the present invention. The above is only an example and should not be limited to this.

[0166] All embodiments of the present invention can be implemented, and some feature combinations can be extracted from the same embodiment. Compared with the prior art, the feature combination can also achieve unexpected effects of the present case. The feature combination includes but is not limited to the combination of features such as face shape, refractive index and conditional formula. The disclosure of the implementation mode of the present invention is a specific embodiment to illustrate the principle of the present invention, and the present invention should not be limited to the disclosed embodiment. In other words, the embodiment and its drawings are only for demonstration of the present invention and are not limited thereto.

[0167] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence along an optical axis from an object side to an image side, each lens having an object side surface facing the object side and allowing imaging light to pass through, and an image side surface facing the image side and allowing imaging light to pass through. The optical imaging lens comprises: The first lens has a positive refractive power, 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 region of the object side surface of the second lens is a convex surface, an optical axis 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 object-side surface of the third lens is a concave surface; The fourth lens has a negative refractive power, an optical axis region of the object side surface of the fourth lens is a concave surface, a circumferential 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; The sixth lens has a positive refractive power, an optical axis region of the image side surface of the sixth lens is a convex surface, an optical axis region of the object side surface of the sixth lens is a convex surface, a circumferential region of the object side surface of the sixth lens is a concave surface, and a circumferential region of the image side surface of the sixth lens is a convex surface; The seventh lens has a negative refractive power, an optical axis region of the object side surface of the seventh lens is a concave surface, a circumferential region of the object side surface of the seventh lens is a convex 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 satisfies V2+V3+V5≧120.000, (T1+L4IL7I) / (T2+G23+T3)≧3.000, ALT / (G56+T6+G67)≦2.600 and (T7+BFL) / (T3+G34)≧1.500, wherein V2 is defined as the Abbe coefficient of the second lens, V3 is defined as the Abbe coefficient of the third lens, V5 is defined as the Abbe coefficient of the fifth lens, T1 is defined as the thickness of the first lens on the optical axis, T2 is defined as the thickness of the second lens on the optical axis, T3 is defined as the thickness of the third lens on the optical axis, and G23 is defined as the distance from the second lens to the optical axis. The air gap of the third lens on the optical axis, L4IL7I is defined as the distance from the image side surface of the fourth lens to the image side surface of the seventh lens on the optical axis, ALT is defined as the sum of the thicknesses of the seven lenses from the first lens to the seventh lens on the optical axis, T6 is defined as the thickness of the sixth lens on the optical axis, G56 is defined as the air gap from the fifth lens to the sixth lens on the optical axis, G67 is defined as the air gap from the sixth lens to the seventh lens on the optical axis, T7 is defined as the thickness of the seventh lens on the optical axis, G34 is defined as the air gap from the third lens to the fourth lens on the optical axis, and BFL is defined as the distance from the image side surface of the seventh lens to an imaging plane on the optical axis.

2. The optical imaging lens according to claim 1, wherein: Wherein ImgH is defined as the image height of the optical imaging lens, Fno is defined as the aperture value of the optical imaging lens, and the optical imaging lens satisfies the following condition: ImgH / Fno≧3.200 mm.

3. The optical imaging lens according to claim 1, wherein: Wherein ImgH is defined as the image height of the optical imaging lens, Fno is defined as the aperture value of the optical imaging lens, EFL is defined as the effective focal length of the optical imaging lens, and the optical imaging lens satisfies the following condition: (EFL+ImgH) / Fno≧6.500 mm.

4. The optical imaging lens according to claim 1, wherein: Wherein V7 is defined as the Abbe coefficient of the seventh lens, and the optical imaging lens satisfies the following condition: V2+V3+V7≧120.

000.

5. The optical imaging lens according to claim 1, wherein: Wherein V7 is defined as the Abbe coefficient of the seventh lens, and the optical imaging lens satisfies the following condition: V2+V5+V7≧120.

000.

6. The optical imaging lens according to claim 1, wherein: Wherein G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: (G45+G56) / G34≧2.

800.

7. The optical imaging lens according to claim 1, wherein: Wherein G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: (G34+G56) / G45≦2.

800.

8. The optical imaging lens according to claim 1, wherein: Wherein G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: (T2+G45) / G34≦3.

500.

9. The optical imaging lens according to claim 1, wherein: Wherein T5 is defined as the thickness of the fifth lens on the optical axis, G12 is defined as the air gap between the first lens and the second lens on the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: (T5+G56+T6+G67) / (G12+G45)≧4.

800.

10. The optical imaging lens according to claim 1, wherein: Wherein AAG is defined as the sum of six air gaps from the first lens to the seventh lens on the optical axis, G12 is defined as the air gap from the first lens to the second lens on the optical axis, and the optical imaging lens satisfies the following condition: AAG / (T1+G12)≦2.

800.

11. The optical imaging lens according to claim 1, wherein: Wherein G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: (G34+G45+G56) / (T2+G23)≦2.

300.

12. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following conditions: (G23+T3) / G56≦2.

500.

13. The optical imaging lens according to claim 1, wherein: Wherein T4 is defined as the thickness of the fourth lens on the optical axis, G12 is defined as the air gap between the first lens and the second lens on the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: (T4+T6) / (G12+G45)≧2.

000.

14. The optical imaging lens according to claim 1, wherein: Wherein, TTL is defined as the distance from the object side of the first lens to the imaging surface on the optical axis, G12 is defined as the air gap from the first lens to the second lens on the optical axis, and the optical imaging lens satisfies the following condition: TTL / (T1+G12+T2+G23)≦5.

000.

15. The optical imaging lens according to claim 1, wherein: Wherein TL is defined as the distance from the object side surface of the first lens to the image side surface of the seventh lens on the optical axis, T4 is defined as the thickness of the fourth lens on the optical axis, and the optical imaging lens satisfies the following condition: TL / (T2+T3+T4)≧5.

000.

16. The optical imaging lens according to claim 1, wherein: Wherein EFL is defined as the effective focal length of the optical imaging lens, G12 is defined as the air gap between the first lens and the second lens on the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: EFL / (G12+T2+G45)≧6.900.

Images