Optical imaging lens

Abstract

The present invention discloses an optical imaging lens, which includes a first lens to a sixth lens in order from the object side to the image side along the optical axis. The first lens has a negative refractive power or the second lens has a positive refractive power; an optical axis area of ​​the object side of the first lens is a convex surface; a circumferential area of ​​the image side of the second lens is a convex surface; the third lens has a positive refractive power or the fourth lens has a negative refractive power; an optical axis area of ​​the image side of the fourth lens is a concave surface; the fifth lens has a positive refractive power, and the sixth lens has a negative refractive power. The refractive power lens of the optical imaging lens is composed of the above six lenses and satisfies the following conditional formulas: 85.000° / mm≦HFOV / AAGF, (G12+T2) / T6≦1.600, 1.000≦ImgH / EFL and TL / (T4+T6)≦5.500. The optical imaging lens has the characteristics of reducing the surface area in front of the lens, reducing the system length of the optical lens, ensuring imaging quality, a large field of view, and having good optical performance.

Description

[0001] This invention patent application is a divisional application. The application number of the original application is 201911420376.7, the application date is December 31, 2019, and the invention name is: 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] The specifications of portable electronic devices are changing with each passing day, and their key components - optical imaging lenses are also becoming more diversified. For the front lenses of portable electronic devices, we not only pursue designs with larger field of view angles, but also pursue higher pixels and imaging quality. The half-angle of the optical imaging lens of the front of existing portable electronic devices is between 36 and 40 degrees. As users want to take more pictures from the angle of selfies, wide-angle lenses with a field of view greater than 50 degrees have become the development goal of the industry.

[0004] In order to capture light from more angles, the existing wide-angle lens first needs to increase the effective radius of the first lens and the aperture must be set behind the first lens, so that more light can be placed in the aperture to reduce the focal length of the system to achieve the design purpose of capturing a larger field of view. However, in addition to the purpose of selfies, the front lens of portable electronic devices also pursues a full-screen design. Therefore, in order to achieve the design purpose of wide angle, when the effective radius of the first lens is increased, the surface area in front of the lens is also increased. Therefore, how to maintain a smaller surface area in front of the lens while increasing the field of view of the lens is a problem that needs to be solved first. Summary of the invention

[0005] Therefore, each embodiment of the present invention proposes a six-piece optical imaging lens that reduces the surface area in front of the lens, reduces the system length of the optical lens, ensures imaging quality, has a large field of view, has good optical performance, and is technically feasible. The six-piece optical imaging lens of the present invention is arranged in sequence on the optical axis from the object side to the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth 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.

[0006] In one embodiment of the present invention, the first lens has a negative refractive power, and the circumferential area of ​​the object side surface of the first lens is a convex surface, the second lens has a positive refractive power, and the optical axis area of ​​the image side surface of the second lens is a convex surface, the third lens has a positive refractive power, the optical axis area of ​​the object side surface of the third lens is a convex surface, and the optical axis area of ​​the image side surface of the third lens is a convex surface; the fourth lens has a negative refractive power; the fifth lens has a positive refractive power; and the sixth lens has a negative refractive power. The refractive power lenses of the optical imaging lens are composed of the above six lenses and meet the following conditional formula: AAGF / T6≦2.000.

[0007] In another embodiment of the present invention, the first lens has a negative refractive power, and the circumferential area of ​​the object side surface of the first lens is a convex surface, the second lens has a positive refractive power, and the optical axis area of ​​the image side surface of the second lens is a convex surface, the third lens has a positive refractive power, and the optical axis area of ​​the object side surface of the third lens is a convex surface, the fourth lens has a negative refractive power, and the circumferential area of ​​the image side surface of the fourth lens is a concave surface; the fifth lens has a positive refractive power; and the sixth lens has a negative refractive power, and the circumferential area of ​​the object side surface of the sixth lens is a concave surface. The refractive power lenses of the optical imaging lens are composed of the above six lenses and meet the following conditional formula: AAGB / (T4+T6)≦3.100.

[0008] In another embodiment of the present invention, the first lens has a negative refractive power, the optical axis region of the object side of the first lens is convex and a circumferential region of the image side of the first lens is concave, the second lens has a positive refractive power, the third lens has a positive refractive power, the optical axis region of the object side of the third lens is convex, the fourth lens has a negative refractive power, the optical axis region of the image side of the fourth lens is concave; the fifth lens has a positive refractive power; and the sixth lens has a negative refractive power, and the optical axis region of the image side of the sixth lens is concave. The refractive power lenses of the optical imaging lens are composed of the above six lenses and meet the following conditional formula: AAG / T6≦1.300.

[0009] In the optical imaging lens of the present invention, the embodiments may also selectively meet the following conditions as required:

[0010] 1.(AAG+T1) / (T4+T6)≦1.600;

[0011] 2.AAG / (T4+T6)≦1.300;

[0012] 3.AAG*Fno / T6≦5.700;

[0013] 4.ALT24 / (T6+G34)≦3.200;

[0014] 5.(T3+G12+G56) / T5≦2.000;

[0015] 6.2.600≦ImgH / AAGF;

[0016] 7.TL / (T4+T6)≦5.500;

[0017] 8.AAGB / (T4+T6)≦3.100;

[0018] 9.AAGF / T6≦2.000;

[0019] 10.ALT / (T6+BFL)≦2.400;

[0020] 11.ALT13 / (T6+G23)≦3.600;

[0021] 12.D11t32 / D32t52≦1.600;

[0022] 13.TTL / ALT46≦3.200;

[0023] 14.ALT / D51t62≦2.300;

[0024] 15.ALT14 / (T6+G45)≦3.100;

[0025] 16.(T1+G45+G56) / T6≦2.100;

[0026] 17.85.000° / mm≦HFOV / AAGF;

[0027] 18.(G12+T2) / T6≦1.600;

[0028] Among them, 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, G12 is defined as the air gap from the first lens to the second lens on the optical axis, G23 is defined as the air gap from the second lens to the third lens on the optical axis, G34 is defined as the air gap from the third lens to the fourth lens on the optical axis, G45 is defined as the air gap from the fourth lens to the fifth lens on the optical axis, and G56 is defined as the air gap from the fifth lens to the sixth lens on the optical axis.

[0029] TTL is defined as the distance from the object side of the first lens to the imaging plane on the optical axis; TL is defined as the distance from the object side of the first lens to the image side of the sixth lens on the optical axis; ALT is defined as the sum of the thicknesses of the six lenses from the first lens to the sixth lens on the optical axis, that is, the sum of T1, T2, T3, T4, T5 and T6; ALT13 is the sum of the thicknesses of the three lenses from the first lens to the third lens on the optical axis, that is, the sum of T1, T2 and T3; ALT24 is the sum of the three thicknesses of the second lens to the fourth lens on the optical axis, that is, the sum of T2, T3 and T4; ALT14 is the sum of the four thicknesses of the first lens to the fourth lens on the optical axis, that is, the sum of T1, T2, T3 and T4; ALT46 is the sum of the three thicknesses of the fourth lens to the sixth lens on the optical axis, that is, the sum of T4, T5 and T6; AAG is defined as the thickness of the first lens to the sixth lens on the optical axis. The sum of five air gaps, namely, the sum of G12, G23, G34, G45 and G56; AAGF is the distance on the optical axis from the object side of the first lens to the object side of the second lens; AAGB is the sum of the five air gaps on the optical axis from the first lens to the sixth lens plus the distance on the optical axis from the image side of the sixth lens to the imaging plane; BFL is defined as the distance on the optical axis from the image side of the sixth lens to the imaging plane; D11t32 is the distance on the optical axis from the object side of the first lens to the image side of the third lens; D32t52 is the distance on the optical axis from the image side of the third lens to the image side of the fifth lens; D51t62 is the distance on the optical axis from the object side of the fifth lens to the image side of the sixth lens; ImgH is the image height of the optical imaging lens; HFOV is the half viewing angle of the optical imaging lens; EFL is the system focal length of the optical imaging lens; Fno is the aperture value of the optical imaging lens.

[0030] The present invention is particularly directed to an optical imaging lens mainly used for shooting images and recording videos, and can be applied to portable electronic products such as mobile phones, cameras, tablet computers, or personal digital assistants (PDAs). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figures 1 to 5 A schematic diagram illustrating a method for determining a curvature shape of an optical imaging lens according to the present invention is shown.

[0032] Figure 6 A schematic diagram of a first embodiment of the optical imaging lens of the present invention is shown.

[0033] Figure 7 A schematic diagram showing the longitudinal spherical aberration and various aberration diagrams of the first embodiment on the imaging plane is shown.

[0034] Figure 8 A schematic diagram of a second embodiment of the optical imaging lens of the present invention is shown.

[0035] Fig. 9 A schematic diagram showing the longitudinal spherical aberration and various aberration diagrams of the second embodiment on the imaging plane is shown.

[0036] Fig.10 A schematic diagram of a third embodiment of the optical imaging lens system of the present invention is shown.

[0037] Fig.11 A schematic diagram showing the longitudinal spherical aberration and various aberration diagrams of the third embodiment on the imaging plane is shown.

[0038] Fig.12 A schematic diagram of a fourth embodiment of the optical imaging lens system of the present invention is shown.

[0039] Fig.13 A schematic diagram showing the longitudinal spherical aberration and various aberrations on the imaging plane of the fourth embodiment is shown.

[0040] Fig.14 A schematic diagram of a fifth embodiment of the optical imaging lens system of the present invention is shown.

[0041] Fig.15 A schematic diagram showing the longitudinal spherical aberration and various aberrations of the fifth embodiment on the imaging plane is shown.

[0042] Fig.16 A schematic diagram of a sixth embodiment of the optical imaging lens system of the present invention is shown.

[0043] Fig.17 A schematic diagram showing the longitudinal spherical aberration and various aberration diagrams of the sixth embodiment on the imaging plane is shown.

[0044] Fig.18 A schematic diagram of a seventh embodiment of the optical imaging lens system of the present invention is shown.

[0045] Fig.19 A schematic diagram showing the longitudinal spherical aberration and various aberration diagrams of the seventh embodiment on the imaging plane is shown.

[0046] Fig. 20 A schematic diagram illustrating an eighth embodiment of the optical imaging lens system of the present invention is shown.

[0047] Fig.21 A schematic diagram showing the longitudinal spherical aberration and various aberrations of the eighth embodiment on the imaging plane is shown.

[0048] Fig. 22 A table diagram showing detailed optical data of the first embodiment.

[0049] Fig.23 A table showing detailed aspherical surface data of the first embodiment.

[0050] Fig.24 A table diagram showing detailed optical data of the second embodiment.

[0051] Fig.25 A table showing detailed aspherical surface data of the second embodiment.

[0052] Fig.26 A table diagram showing detailed optical data of the third embodiment.

[0053] Fig. 27 A table showing detailed aspherical surface data of the third embodiment.

[0054] Fig.28 A table diagram showing detailed optical data of the fourth embodiment.

[0055] Fig.29 A table showing detailed aspherical surface data of the fourth embodiment.

[0056] Fig.30 A table diagram showing detailed optical data of the fifth embodiment.

[0057] Fig.31 A table showing detailed aspherical surface data of the fifth embodiment.

[0058] Fig.32 A table diagram showing detailed optical data of the sixth embodiment.

[0059] Fig.33 A table showing detailed aspherical surface data of the sixth embodiment.

[0060] Fig.34 A table diagram showing detailed optical data of the seventh embodiment.

[0061] Fig.35 A table showing detailed aspherical surface data of the seventh embodiment.

[0062] Fig.36 A table diagram showing detailed optical data of the eighth embodiment.

[0063] Fig.37 A table showing detailed aspherical surface data of the eighth embodiment.

[0064] Fig.38 A table showing important parameters of each embodiment.

[0065] Fig.39 A table showing important parameters of each embodiment. DETAILED DESCRIPTION

[0066] Before describing the present invention in detail, the symbols in the accompanying drawings are first clearly indicated: 1···optical imaging lens; A1···object side; A2···image side; I···optical axis; 10···first lens; 11, 21, 31, 41, 51, 61, 110, 410, 510···object side surface; 12, 22, 32, 42, 52, 62, 120, 320···image side surface; 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, Z1···optical axis area; 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, Z2···circumferential area; 20···second lens; 30···third lens ;40···the fourth lens;50···the fifth lens;60···the sixth lens;80···the aperture;90···the filter;91···the imaging plane;130···the assembly part;211,212···the parallel light rays;100,200,300,400,500···the lens;CP···the center point;CP1···the first center point;CP2···the second center point;TP1···the first transition point;TP2···the second transition pointOB···the optical boundary;Lc···the main light ray;Lm···the edge light ray;EL···the extension line;Z3···the relay area;M,R···the intersection point;T1,T2,T3,T4,T5,T6···the thickness of each lens on the optical axis.

[0067] 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.

[0068] 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.

[0069] Figure 1is 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).

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] like Figure 6 As shown, the optical imaging lens 1 of the present invention is mainly composed of six 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 the first lens 10, the aperture 80, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60 and the image plane 91 in sequence. Generally speaking, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50 and the sixth lens 60 can 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, the lenses having refractive powers are only the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50 and the sixth lens 60. 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.

[0082] In addition, the optical imaging lens 1 further includes an aperture stop 80, which is disposed at an appropriate position. Figure 6 In the embodiment of the present invention, the aperture 80 is disposed between the first lens 10 and the second lens 20. When the light (not shown) emitted by the object to be photographed (not shown) located at the object side A1 enters the optical imaging lens 1 of the present invention, it will sequentially pass through the first lens 10, the aperture 80, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60 and the filter 90, and then will be focused on the imaging surface 91 of the image side A2 to form a clear image. In various embodiments of the present invention, the filter 90 is disposed between the sixth lens 60 and the imaging surface 91, and it can be a filter with various suitable functions. For example, the filter 90 can be an infrared cut-off filter, which is used to prevent infrared rays in the imaging light from being transmitted to the imaging surface 91 and affecting the imaging quality.

[0083] Each lens in the optical imaging lens 1 of the present invention has an object-side surface facing the object side A1 and allowing the imaging light to pass through, and an image-side surface facing the image side A2 and allowing the 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; and the sixth lens 60 has an object-side surface 61 and an image-side surface 62. Each object-side surface and image-side surface has an optical axis region and a circumferential region, respectively.

[0084] 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, and the sixth lens 60 has a sixth lens thickness T6. 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.

[0085] In addition, in the optical imaging lens 1 of the present invention, there are air gaps between each lens 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, and the air gap from the fifth lens 50 to the sixth lens 60 is called G56. Therefore, the sum of the five air gaps from the first lens 10 to the sixth lens 60 on the optical axis I is called AAG. That is, AAG = G12 + G23 + G34 + G45 + G56.

[0086] In addition, the distance between the object side surface 11 of the first lens 10 and the imaging surface 91 on the optical axis I is the system length TTL of the optical imaging lens 1. The system focal length of the optical imaging lens 1 is EFL, the distance between the image side surface 62 of the sixth lens 60 and the imaging surface 91 on the optical axis I is BFL, the distance between the object side surface 11 of the first lens 10 and the image side surface 62 of the sixth lens 60 on the optical axis I is TL, the half viewing angle of the optical imaging lens 1 is HFOV, and the image height of the optical imaging lens 1 is ImgH.

[0087] In addition, ALT13 is the sum of the three lens thicknesses of the first lens to the third lens on the optical axis, that is, the sum of T1, T2 and T3; ALT24 is the sum of the three thicknesses of the second lens to the fourth lens on the optical axis, that is, the sum of T2, T3 and T4; ALT14 is the sum of the four thicknesses of the first lens to the fourth lens on the optical axis, that is, the sum of T1, T2, T3 and T4; ALT46 is the sum of the three thicknesses of the fourth lens to the sixth lens on the optical axis, that is, the sum of T4, T5 and T6; AA GF is the distance from the object side surface of the first lens to the object side surface of the second lens on the optical axis; AAGB is the sum of the five air gaps on the optical axis from the first lens to the sixth lens plus the distance from the image side surface of the sixth lens to the imaging plane on the optical axis; D11t32 is the distance from the object side surface of the first lens to the image side surface of the third lens on the optical axis; D32t52 is the distance from the image side surface of the third lens to the image side surface of the fifth lens on the optical axis; D51t62 is the distance from the object side surface of the fifth lens to the image side surface of the sixth lens on the optical axis.

[0088] When the filter 90 is arranged between the sixth lens 60 and the imaging plane 91, G6F represents the air gap from the sixth lens 60 to the filter 90 on the optical axis I, TF represents the thickness of the filter 90 on the optical axis I, GFP represents the air gap from the filter 90 to the imaging plane 91 on the optical axis I, and BFL is the distance from the image side surface 62 of the sixth lens 60 to the imaging plane 91 on the optical axis I, that is, BFL=G6F+TF+GFP.

[0089] Redefine: 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; 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; υ1 is the Abbe number of the first lens 10; υ2 is the Abbe number of the second lens 20; υ3 is the Abbe number of the third lens 30; υ4 is the Abbe number of the fourth lens 40; υ5 is the Abbe number of the fifth lens 50; υ6 is the Abbe number of the sixth lens 60.

[0090] First embodiment

[0091] See also Figure 6 , illustrating the first embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration of the first embodiment on the imaging surface 91, 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 2.280 mm.

[0092] The optical imaging lens 1 of the first embodiment is mainly composed of six lenses with refractive powers, an aperture 80, and an imaging surface 91. The aperture 80 of the first embodiment is disposed between the object side A1 and the first lens 10. The filter 90 may be an infrared cutoff filter.

[0093] The first lens 10 has a negative 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 are aspherical surfaces, but the present invention is not limited thereto.

[0094] The second lens 20 has a positive 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 convex surface and the circumferential region 27 thereof is a convex 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.

[0095] The third lens 30 has a positive refractive power. The optical axis region 33 of the object side surface 31 of the third lens 30 is a convex surface and the circumferential region 34 thereof is a convex surface. The optical axis region 36 of the image side surface 32 of the third lens 30 is a convex surface and the circumferential region 37 thereof is a convex surface. The object side surface 31 and the image side surface 32 of the third lens 30 are both aspherical surfaces, but the present invention is not limited thereto.

[0096] 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 concave surface and a circumferential region 47 thereof is a concave 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.

[0097] The fifth lens element 50 has a positive refractive power, an optical axis region 53 of an object-side surface 51 of the fifth lens element 50 is a concave surface and a circumferential region 54 thereof is a convex surface, an optical axis region 56 of an image-side surface 52 of the fifth lens element 50 is a convex 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.

[0098] The sixth lens 60 has a negative 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 concave 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. The filter 90 is located between the image side surface 62 and the imaging surface 91 of the sixth lens 60.

[0099] In the optical imaging lens 1 of the present invention, from the first lens 10 to the sixth lens 60, all the object-side surfaces 11 / 21 / 31 / 41 / 51 / 61 and the image-side surfaces 12 / 22 / 32 / 42 / 52 / 62 are a total of twelve curved surfaces. If they are aspherical surfaces, these aspherical surfaces are defined by the following formulas:

[0100]

[0101] in:

[0102] Y represents the vertical distance between the point on the aspherical surface and the optical axis I;

[0103] Z represents the 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 surface on the optical axis I);

[0104] R represents the radius of curvature of the lens surface near the optical axis I;

[0105] K is the conic constant;

[0106] a i is the i-th order aspheric coefficient.

[0107] The optical data of the optical lens system of the first embodiment are as follows: Fig. 22 As shown, the aspheric data is as follows Fig.23 As shown. In the optical lens system of the following embodiments, the aperture value (f-number) of the overall optical imaging lens is Fno, the system 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. The units of the image height, radius of curvature, thickness and focal length of the optical imaging lens are all millimeters (mm). In this embodiment, EFL = 1.487 mm; HFOV = 52.495 degrees; TTL = 4.027 mm; Fno = 4.385; image height = 2.280 mm.

[0108] Second embodiment

[0109] 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 with a different surface type from the first embodiment are specially marked on the figure, while the optical axis area and the circumference area of ​​the other surface types that are the same as the lens of the first embodiment, such as concave or convex surface, are not marked separately. For the longitudinal spherical aberration of the second embodiment on the imaging surface 91, 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 aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the circumferential area 34 of the object side surface 31 of the third lens 30 is a concave surface, and the optical axis area 43 of the object side surface 41 of the fourth lens 40 is a convex surface.

[0110] The detailed optical data of the second embodiment are as follows Fig.24 As shown, the aspheric data is as follows Fig.25 As shown. In this embodiment, EFL = 2.136 mm; HFOV = 52.452 degrees; TTL = 4.291 mm; Fno = 2.468; image height = 2.297 mm. In particular: 1. The longitudinal spherical aberration of the second embodiment is better than the longitudinal spherical aberration of the first embodiment; 2. The field curvature aberration in the sagittal direction of the second embodiment is better than the field curvature aberration in the sagittal direction of the first embodiment; 3. The field curvature aberration in the meridional direction of the second embodiment is better than the field curvature aberration in the meridional direction of the first embodiment; 4. The distortion aberration of the second embodiment is better than the distortion aberration of the first embodiment.

[0111] Third embodiment

[0112] 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 surface 91, 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 circumferential area 34 of the object side surface 31 of the third lens 30 is a concave surface, the optical axis area 43 of the object side surface 41 of the fourth lens 40 is a convex surface, and the circumferential area 54 of the object side surface 51 of the fifth lens 50 is a concave surface.

[0113] The detailed optical data of the third embodiment are as follows Fig.26 As shown, the aspheric data is as follows Fig. 27 As shown, in this embodiment, EFL=1.351 mm; HFOV=52.477 degrees; TTL=4.126 mm; Fno=1.551; image height=2.297 mm. In particular, the field curvature aberration in the tangential direction of the third embodiment is better than that in the first embodiment.

[0114] Fourth embodiment

[0115] 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 surface 91, 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 aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the circumferential area 34 of the object side surface 31 of the third lens 30 is a concave surface, and the optical axis area 43 of the object side surface 41 of the fourth lens 40 is a convex surface.

[0116] The detailed optical data of the fourth embodiment are as follows Fig.28 As shown, the aspheric data is as follows Fig.29 As shown. In this embodiment, EFL = 2.088 mm; HFOV = 52.465 degrees; TTL = 4.239 mm; Fno = 4.385; image height = 2.297 mm. In particular: 1. The longitudinal spherical aberration of the fourth embodiment is better than the longitudinal spherical aberration of the first embodiment; 2. The field curvature aberration in the sagittal direction of the fourth embodiment is better than the field curvature aberration in the sagittal direction of the first embodiment; 3. The field curvature aberration in the meridional direction of the fourth embodiment is better than the field curvature aberration in the meridional direction of the first embodiment; 4. The distortion aberration of the fourth embodiment is better than the distortion aberration of the first embodiment.

[0117] Fifth embodiment

[0118] 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 surface 91, 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.15The 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 aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the optical axis region 43 of the object side surface 41 of the fourth lens 40 is a convex surface.

[0119] The detailed optical data of the fifth embodiment are as follows Fig.30 As shown, the aspheric data is as follows Fig.31 As shown, in this embodiment, EFL = 2.039 mm; HFOV = 52.495 degrees; TTL = 4.488 mm; Fno = 3.834; image height = 2.297 mm. In particular: 1. The longitudinal spherical aberration of the fifth embodiment is better than the longitudinal spherical aberration of the first embodiment; 2. The field curvature aberration in the sagittal direction of the fifth embodiment is better than the field curvature aberration in the sagittal direction of the first embodiment; 3. The field curvature aberration in the meridional direction of the fifth embodiment is better than the field curvature aberration in the meridional direction of the first embodiment; 4. The distortion aberration of the fifth embodiment is better than the distortion aberration of the first embodiment.

[0120] Sixth embodiment

[0121] 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 surface 91, 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 aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the circumferential area 34 of the object side surface 31 of the third lens 30 is a concave surface, the optical axis area 43 of the object side surface 41 of the fourth lens 40 is a convex surface, and the circumferential area 57 of the image side surface 52 of the fifth lens 50 is a concave surface.

[0122] The detailed optical data of the sixth embodiment are as follows Fig.32 As shown, the aspheric data is as follows Fig.33 As shown, in this embodiment, EFL = 2.297 mm; HFOV = 52.524 degrees; TTL = 4.537 mm; Fno = 3.941; image height = 2.297 mm. In particular: 1. The half viewing angle of the sixth embodiment is greater than that of the first embodiment; 2. The longitudinal spherical aberration of the sixth embodiment is better than that of the first embodiment; 3. The field curvature aberration in the sagittal direction of the sixth embodiment is better than that of the first embodiment; 4. The field curvature aberration in the tangential direction of the sixth embodiment is better than that of the first embodiment; 5. The distortion aberration of the sixth embodiment is better than that of the first embodiment.

[0123] Seventh embodiment

[0124] 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 surface 91, 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.19 The 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 aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the circumferential area 34 of the object side surface 31 of the third lens 30 is a concave surface, and the optical axis area 43 of the object side surface 41 of the fourth lens 40 is a convex surface.

[0125] The detailed optical data of the seventh embodiment are as follows Fig.34 As shown, the aspheric data is as follows Fig.35 As shown, in this embodiment, EFL = 2.024 mm; HFOV = 52.509 degrees; TTL = 4.480 mm; Fno = 3.524; image height = 2.297 mm. In particular: 1. The semi-angle of view of the seventh embodiment is greater than that of the first embodiment; 2. The longitudinal spherical aberration of the seventh embodiment is better than that of the first embodiment; 3. The field curvature aberration in the sagittal direction of the seventh embodiment is better than that of the first embodiment; 4. The field curvature aberration in the tangential direction of the seventh embodiment is better than that of the first embodiment; 5. The distortion aberration of the seventh embodiment is better than that of the first embodiment.

[0126] Eighth embodiment

[0127] 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 surface 91, 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 aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the optical axis area 26 of the image side surface 22 of the second lens 20 is a concave surface, the circumferential area 34 of the object side surface 31 of the third lens 30 is a concave surface, and the circumferential area 57 of the image side surface 52 of the fifth lens 50 is a concave surface.

[0128] The detailed optical data of the eighth embodiment are as follows Fig.36As shown, the aspheric data is as follows Fig.37 As shown, in this embodiment, EFL = 1.922 mm; HFOV = 52.526 degrees; TTL = 4.183 mm; Fno = 2.318; image height = 2.297 mm. In particular: 1. The half viewing angle of the eighth embodiment is greater than the half viewing angle of the first embodiment; 2. The longitudinal spherical aberration of the eighth embodiment is better than the longitudinal spherical aberration of the first embodiment; 3. The field curvature aberration of the eighth embodiment in the sagittal direction is better than the field curvature aberration of the first embodiment in the sagittal direction; 4. The distortion aberration of the eighth embodiment is better than the distortion aberration of the first embodiment.

[0129] In addition, the important parameters of each embodiment are summarized in Fig.38 and Fig.39 middle.

[0130] The applicant has found that the lens configuration of the present invention has the following characteristics and corresponding effects:

[0131] 1) The aperture is set between the first lens and the second lens. The following combination is helpful to increase the field of view while reducing the surface area in front of the lens:

[0132] 1. The first lens has a negative refractive power, the circumferential area of ​​the object side surface of the first lens is convex, the second lens has a positive refractive power, the optical axis area of ​​the image side surface of the second lens is convex, the optical axis area of ​​the object side surface of the third lens is convex, and the optical axis area of ​​the image side surface of the third lens is convex, and AAGF / T6≦2.000, and the preferred limit is 0.700≦AAGF / T6≦2.000;

[0133] 2. The first lens has a negative refractive power, the circumferential area of ​​the object side surface of the first lens is convex, the optical axis area of ​​the image side surface of the second lens is convex, the optical axis area of ​​the object side surface of the third lens is convex, the circumferential area of ​​the image side surface of the fourth lens is concave, the circumferential area of ​​the object side surface of the sixth lens is concave, and AAGB / (T4+T6)≦3.100, and the preferred limit is 1.600≦AAGB / (T4+T6)≦3.100;

[0134] 3. The first lens has a negative refractive power, the optical axis area of ​​the object side surface of the first lens is convex, the circumferential area of ​​the image side surface of the first lens is concave, the optical axis area of ​​the object side surface of the third lens is convex, the optical axis area of ​​the image side surface of the fourth lens is concave, the optical axis area of ​​the image side surface of the sixth lens is concave, and AAG / T6≦1.300, and the preferred limit is 0.900≦AAG / T6≦1.300.

[0135] 2) The optical imaging lens of the present invention further satisfies the following conditional formula, which helps to maintain the system focal length and optical parameters at an appropriate value, and avoids any parameter being too large and detrimental to the correction of the aberration of the entire optical imaging system, or any parameter being too small and affecting assembly or increasing the difficulty of manufacturing. 1.000≦ImgH / EFL, preferably limited to 1.000≦ImgH / EFL≦1.700.

[0136] 3) The optical imaging lens of the present invention further satisfies the following conditional formula, which helps to maintain the thickness and spacing of each lens at an appropriate value, avoiding any parameter being too large and thus detrimental to the overall thinning of the optical imaging lens, or avoiding any parameter being too small and thus affecting assembly or increasing the difficulty of manufacturing.

[0137] 1. (G12+T2) / T6≦1.600, the best limit is 0.700≦(G12+T2) / T6≦1.600;

[0138] 2. TL / (T4+T6)≦5.500, the better limit is 3.200≦TL / (T4+T6)≦5.500;

[0139] 3. AAG / (T4+T6)≦1.300, the best limit is 0.600≦AAG / (T4+T6)≦1.300;

[0140] 4.(AAG+T1) / (T4+T6)≦1.600, the optimal limit is 0.800≦(AAG+T1) / (T4+T6)≦1.600; 5.85.000° / mm≦HFOV / AAGF, the optimal limit is 85.000° / mm≦HFOV / AAGF≦120.000° / mm;

[0141] 6.TTL / ALT46≦3.100, the best limit is 2.400≦TTL / ALT46≦3.100;

[0142] 7. ALT / (T6+BFL)≦2.400, the better limit is 1.400≦ALT / (T6+BFL)≦2.400;

[0143] 8.D11t32 / D32t52≦1.600, the best limit is 0.900≦D11t32 / D32t52≦1.600;

[0144] 9. ALT / D51t62≦2.300, the better limit is 1.700≦ALT / D51t62≦2.300;

[0145] 10. ALT13 / (T6+G23)≦3.600, the better limit is 1.500≦ALT13 / (T6+G23)≦3.600;

[0146] 11. ALT24 / (T6+G34)≦3.200, the better limit is 1.500≦ALT24 / (T6+G34)≦3.200;

[0147] 12. ALT14 / (T6+G45)≦3.100, the better limit is 1.500≦ALT14 / (T6+G45)≦3.100;

[0148] 13.(T3+G12+G56) / T5≦2.000, the best limit is 0.600≦(T3+G12+G56) / T5≦2.000;

[0149] 14.(T1+G45+G56) / T6≦2.100, the best limit is 0.700≦(T1+G45+G56) / T6≦2.100;

[0150] 15.2.600≦ImgH / AAGF. The preferred limit is 2.600≦ImgH / AAGF≦5.000.

[0151] 4) The optical imaging lens of the present invention further satisfies the following conditional expressions, which helps to maintain the aperture value and each optical parameter at an appropriate value, and avoids any parameter being too large and thus causing the aperture value to be reduced, or any parameter being too small and thus affecting assembly or increasing the difficulty of manufacturing.

[0152] AAG*Fno / T6≦5.700, the better limit is 1.600≦AAG*Fno / T6≦5.700.

[0153] 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.

[0154] 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 reduce the surface area in front of the lens, shorten the lens length, increase the aperture, improve the imaging quality, or improve the assembly yield, thereby improving the shortcomings of the prior art.

[0155] 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 additionally 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.

[0156] 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.

[0157] 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, comprising, in order from an object side to an image side along an optical axis, a first lens, an aperture, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein each of the first lens to the sixth lens comprises 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, the optical imaging lens comprising: The first lens has a negative refractive power, an optical axis 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, a circumferential region of the image side surface of the first lens is a concave surface, and a circumferential region of the object side surface of the first lens is a convex surface; The second lens has a positive 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, a circumferential region of the image side surface of the second lens is a convex surface, and an optical axis region of the image side surface of the second lens is a convex surface; The third lens has a positive refractive power, an optical axis region of the object side surface of the third lens is a convex surface, an optical axis region of the image side surface of the third lens is a convex surface, and a circumferential region of the image side surface of the third lens is a convex surface; The fourth lens has a negative refractive power, an optical axis region of the image-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, and a circumferential region of the image-side surface of the fourth lens is a concave surface; The fifth lens has a positive refractive power, an optical axis region of the object-side surface of the fifth lens is a concave surface, and an optical axis region of the image-side surface of the fifth lens is a convex surface; and The sixth lens has a negative refractive power, 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, an optical axis region of the image 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 refractive power lens of the optical imaging lens is composed of the above six lenses, AAGF is the distance from the object side surface of the first lens to the object side surface of the second lens on the optical axis, T6 is the thickness of the sixth lens on the optical axis, and satisfies the following condition: AAGF / T6≦2.

000.

2. The optical imaging lens according to claim 1, wherein: Wherein T1 is the thickness of the first lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and the optical imaging lens satisfies the following condition: (AAG+T1) / (T4+T6)≦1.

600.

3. The optical imaging lens according to claim 1, wherein: Wherein T4 is the thickness of the fourth lens on the optical axis, and the optical imaging lens satisfies the following condition: AAG / (T4+T6)≦1.

300.

4. The optical imaging lens according to claim 1, wherein: Wherein Fno is the aperture value of the optical imaging lens, and the optical imaging lens satisfies the following conditions: AAG*Fno / T6≦5.

700.

5. The optical imaging lens according to claim 1, wherein: ALT24 is the sum of the three thicknesses of the second lens to the fourth lens on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, and the optical imaging lens satisfies the following condition: ALT24 / (T6+G34)≦3.

200.

6. The optical imaging lens according to claim 1, wherein: Wherein T3 is the thickness of the third lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and the optical imaging lens satisfies the following condition: (T3+G12+G56) / T5≦2.

000.

7. The optical imaging lens according to claim 1, wherein: Wherein HFOV is the half viewing angle of the optical imaging lens, and the optical imaging lens satisfies the following conditional formula: 85.000° / mm≦HFOV / AAGF.

8. The optical imaging lens according to claim 1, wherein: Wherein ImgH is the image height of the optical imaging lens, and the optical imaging lens satisfies the following condition: 2.600≦ImgH / AAGF.

9. The optical imaging lens according to claim 1, wherein: Wherein TL is the distance from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and the optical imaging lens satisfies the following condition: TL / (T4+T6)≦5.

500.

10. The optical imaging lens according to claim 1, wherein: Wherein, AAGB is the sum of five air gaps from the first lens to the sixth lens on the optical axis plus the distance from the image side surface of the sixth lens to an imaging surface on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and satisfies the following conditional formula: AAGB / (T4+T6)≦3.

100.

11. The optical imaging lens according to claim 1, wherein: Wherein G12 is the air gap between the first lens and the second lens on the optical axis, T2 is the thickness of the second lens on the optical axis, and the following condition is satisfied: (G12+T2) / T6≦1.

600.

12. The optical imaging lens according to claim 1, wherein: Wherein ALT is the sum of the thicknesses of six lenses from the first lens to the sixth lens on the optical axis, BFL is the distance from the image side surface of the sixth lens to an imaging plane on the optical axis, and the optical imaging lens satisfies the following condition: ALT / (T6+BFL)≦2.

400.

13. The optical imaging lens according to claim 1, wherein: Wherein ALT13 is the sum of the thicknesses of the three lenses from the first lens to the third lens on the optical axis, G23 is the air gap from the second lens to the third lens on the optical axis, and the optical imaging lens satisfies the following condition: ALT13 / (T6+G23)≦3.

600.

14. The optical imaging lens according to claim 1, wherein: Wherein D11t32 is the distance from the object side surface of the first lens to the image side surface of the third lens on the optical axis, D32t52 is the distance from the image side surface of the third lens to the image side surface of the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: D11t32 / D32t52≦1.

600.

15. The optical imaging lens according to claim 1, wherein: Wherein TTL is the distance from the object side surface of the first lens to an imaging surface on the optical axis, ALT46 is the sum of three thicknesses of the fourth lens to the sixth lens on the optical axis, and the optical imaging lens satisfies the following condition: TTL / ALT46≦3.

200.

16. The optical imaging lens according to claim 1, wherein: Wherein ALT is the sum of the thicknesses of six lenses from the first lens to the sixth lens on the optical axis, D51t62 is the distance from the object side surface of the fifth lens to the image side surface of the sixth lens on the optical axis, and the optical imaging lens satisfies the following condition: ALT / D51t62≦2.

300.

17. The optical imaging lens according to claim 1, wherein: ALT14 is the sum of the four thicknesses of the first lens to the fourth lens on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: ALT14 / (T6+G45)≦3.

100.

18. The optical imaging lens according to claim 1, wherein: Wherein T1 is the thickness of the first lens on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and the optical imaging lens satisfies the following condition: (T1+G45+G56) / T6≦2.100.

Images