Optical imaging lens

Abstract

The present invention provides an optical imaging lens, which includes a first, a second, a third, a fourth, a fifth, a sixth, a seventh, and an eighth lens in order from an object side to an image side. The present invention achieves the purpose of increasing resolution, increasing aperture and image height while maintaining good imaging quality by controlling the arrangement of concave and convex surfaces on the lens surface.

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] The specifications of portable electronic devices are changing with each passing day, and their key components - optical imaging lenses are also developing in a more diversified way. The main lens of portable electronic devices not only requires a larger aperture and a shorter system length, but also pursues higher pixels and higher resolution. High pixels imply that the image height of the lens must be increased, and the pixel requirements are increased by using a larger image sensor to receive imaging light. However, although the large aperture design allows the lens to receive more imaging light, it increases the difficulty of design; and high pixels lead to the need to increase the resolution of the lens, and if it is combined with a large aperture design, the design difficulty will be doubled. Therefore, how to add multiple lenses to the limited system length of the optical imaging lens, increase the resolution, and increase the aperture and image height at the same time is a challenge that needs to be solved. Summary of the invention

[0003] In view of the above problems, optical imaging lenses can provide characteristics such as light, thin, short, small aperture value, large image height, etc., while maintaining good imaging quality.

[0004] The present invention provides an optical imaging lens that can be used for shooting images and recording videos, and can be applied to portable electronic products, such as mobile phones, cameras, tablet computers, personal digital assistants (PDAs) or head-mounted displays (such as displays of augmented reality (AR), virtual reality (VR) or mixed reality (MR)). The optical imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence along an optical axis from an object side to an image side, and each lens has 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 purpose of increasing resolution and increasing aperture and image height is achieved through the concave-convex surface configuration of the eight lenses.

[0005] In the disclosure of the present invention, the parameters listed in the following table are used, but are not limited to use only these parameters:

[0006] Table 1 Parameters

[0007]

[0008]

[0009]

[0010]

[0011] According to an optical imaging lens provided by an embodiment of the present invention, the first lens has a positive refractive power or the second lens has a negative refractive power, the third lens has a positive refractive power, an optical axis region of the object-side surface of the fourth lens is a convex surface, an optical axis region of the object-side surface of the fifth lens is a convex surface and 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 sixth lens is a concave surface, and a circumferential region of the object-side surface of the eighth lens is a convex surface. The optical imaging lens has only the above eight lenses and satisfies conditional formula (1): Fno*(D12t32+D41t52) / (T1+G34)≦3.300.

[0012] According to another embodiment of the present invention, the optical imaging lens is provided, wherein the first lens has a positive refractive power or the second lens has a negative refractive power, the third lens has a positive refractive power, an optical axis region of the image 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 convex surface, an optical axis region of the image side surface of the fifth lens is a concave surface, the sixth lens has a positive refractive power and an optical axis region of the object side surface of the sixth lens is a concave surface, and the seventh lens has a positive refractive power. The optical imaging lens comprises only the above eight lenses and satisfies conditional formula (2): Fno*(D12t32+D41t52) / (T1+G34)≦3.600.

[0013] According to another embodiment of the present invention, the optical imaging lens is provided, wherein the first lens has a positive refractive power or the second lens has a negative refractive power, the third lens has a positive refractive power and a circumferential region of the object side surface of the third lens is a convex surface, an optical axis region of the object side surface of the fourth lens is a convex surface and a circumferential region of the image side surface of the fourth lens is a convex surface, an optical axis region of the object side surface of the fifth lens is a convex surface and 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 sixth lens is a concave surface, and an optical axis region of the image side surface of the seventh lens is a concave surface. The optical imaging lens has only the above eight lenses and satisfies conditional formula (1).

[0014] The optical imaging lenses of the above three embodiments may also selectively satisfy any of the following conditions:

[0015] Conditional formula (3): ALT*Fno / T1≦6.300;

[0016] Conditional formula (4): (D12t32+D41t52) / G34≦6.100;

[0017] Conditional formula (5): (V4+V6+V8) / V5≦2.400;

[0018] Conditional formula (6): Fno*TTL / (T1+D71t82)≦4.100;

[0019] Conditional formula (7): D21t32 / G34≦2.500;

[0020] Conditional formula (8): (D21t32+T6+G67) / (T4+G45)≦3.300;

[0021] Conditional formula (9): (EPD+ImgH) / ALT≧1.800;

[0022] Conditional formula (10): (T6+G67+G78) / T8≦4.500;

[0023] Conditional formula (11): (G12+D21t32) / T4≦3.600;

[0024] Conditional formula (12): D21t32 / G45≦5.600;

[0025] Conditional formula (13): (T5+T6) / G56≦4.900;

[0026] Conditional formula (14): V5+V6≦100.000;

[0027] Conditional formula (15): V3+V4≦100.000;

[0028] Conditional formula (16): V4+V7≦100.000;

[0029] Conditional formula (17): TL / EPD ≤ 2.000;

[0030] Conditional formula (18): EFL / (T1+G34)≦5.500;

[0031] Conditional formula (19): Fno*(T2+T3+T5+T6+G78+BFL) / AAG≦2.900.

[0032] The exemplary limiting conditional expressions listed above can also be selectively combined in different quantities and applied to the implementation of the present invention, and are not limited thereto. When implementing the present invention, in addition to the aforementioned conditional expressions, other lens concave and convex surface arrangements, refractive index changes, selection of various materials or other detailed structures 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.

[0033] From the above, it can be seen that the optical imaging lens of the present invention can increase the resolution, enlarge the aperture and image height while maintaining good imaging quality by controlling the arrangement of the concave and convex surfaces of each lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a radial cross-sectional view of a lens according to one embodiment of the present invention.

[0035] Figure 2 It is a schematic diagram of the relationship between the lens surface shape and the focus of light according to one embodiment of the present invention.

[0036] Figure 3 This is a graph showing the relationship between the lens surface shape and the effective radius of Example 1.

[0037] Figure 4 This is a graph showing the relationship between the lens surface shape and the effective radius of Example 2.

[0038] Figure 5 This is the relationship between the lens surface shape and the effective radius of Example 3.

[0039] Figure 6 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the first embodiment of the present invention.

[0040] Figure 7 It is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the first embodiment of the present invention.

[0041] Figure 8 This is a table diagram of detailed optical data of each lens of the optical imaging lens of the first embodiment of the present invention.

[0042] Fig. 9 It is a table diagram of aspherical surface data of the optical imaging lens of the first embodiment of the present invention.

[0043] Fig.10 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the second embodiment of the present invention.

[0044] Fig.11 It is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the second embodiment of the present invention.

[0045] Fig.12 This is a table diagram of detailed optical data of each lens of the optical imaging lens of the second embodiment of the present invention.

[0046] Fig.13 It is a table diagram of aspherical surface data of the optical imaging lens according to the second embodiment of the present invention.

[0047] Fig.14 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the third embodiment of the present invention.

[0048] Fig.15 It is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the third embodiment of the present invention.

[0049] Fig.16 It is a table diagram of detailed optical data of each lens of the optical imaging lens of the third embodiment of the present invention.

[0050] Fig.17 It is a table diagram of aspherical surface data of the optical imaging lens according to the third embodiment of the present invention.

[0051] Fig.18 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the fourth embodiment of the present invention.

[0052] Fig.19 It is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the fourth embodiment of the present invention.

[0053] Fig. 20 It is a table diagram of detailed optical data of each lens of the optical imaging lens of the fourth embodiment of the present invention.

[0054] Fig.21 It is a table diagram of aspherical surface data of the optical imaging lens according to the fourth embodiment of the present invention.

[0055] Fig. 22 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the fifth embodiment of the present invention.

[0056] Fig.23 It is a schematic diagram of longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fifth embodiment of the present invention.

[0057] Fig.24 It is a table diagram of detailed optical data of each lens of the optical imaging lens of the fifth embodiment of the present invention.

[0058] Fig.25 It is a table diagram of aspherical surface data of the optical imaging lens according to the fifth embodiment of the present invention.

[0059] Fig.26 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the sixth embodiment of the present invention.

[0060] Fig. 27 It is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the sixth embodiment of the present invention.

[0061] Fig.28 It is a table diagram of detailed optical data of each lens of the optical imaging lens of the sixth embodiment of the present invention.

[0062] Fig.29 It is a table diagram of aspherical surface data of the optical imaging lens according to the sixth embodiment of the present invention.

[0063] Fig.30 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the seventh embodiment of the present invention.

[0064] Fig.31 FIG. 4 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the seventh embodiment of the present invention.

[0065] Fig.32 It is a table diagram of detailed optical data of each lens of the optical imaging lens of the seventh embodiment of the present invention.

[0066] Fig.33 It is a table diagram of aspherical surface data of the optical imaging lens according to the seventh embodiment of the present invention.

[0067] Fig.34 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the eighth embodiment of the present invention.

[0068] Fig.35 It is a schematic diagram of longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eighth embodiment of the present invention.

[0069] Fig.36 This is a table diagram of detailed optical data of each lens of the optical imaging lens of the eighth embodiment of the present invention.

[0070] Fig.37 It is a table diagram of aspherical surface data of the optical imaging lens according to the eighth embodiment of the present invention.

[0071] Fig.38 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the ninth embodiment of the present invention.

[0072] Fig.39 It is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the ninth embodiment of the present invention.

[0073] Fig.40 It is a table diagram of detailed optical data of each lens of the optical imaging lens of the ninth embodiment of the present invention.

[0074] Fig.41 It is a table diagram of aspherical surface data of the optical imaging lens according to the ninth embodiment of the present invention.

[0075] Fig.42 It is a schematic diagram of the cross-sectional structure of the optical imaging lens of the tenth embodiment of the present invention.

[0076] Fig.43 Schematic diagram of longitudinal spherical aberration and various aberrations of the optical imaging lens of the tenth embodiment of the present invention.

[0077] Fig.44 This is a table diagram of detailed optical data of each lens of the optical imaging lens of the tenth embodiment of the present invention.

[0078] Fig.45 It is a table diagram of aspherical surface data of the optical imaging lens according to the tenth embodiment of the present invention.

[0079] Fig.46 , Fig.47 , Fig.48 and Fig.49 The parameters of the ten embodiments of the present invention and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45) , (EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG. DETAILED DESCRIPTION

[0080] Before describing the present invention in detail, the symbols in the accompanying drawings are first clearly indicated: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 optical imaging lens; 100, 200, 300, 400, 500, L1, L2, L3, L4, L5, L6, L7, L8 lenses; 110, 410, 510, L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1, TFA1 object side; 120, 320, L1A2, L2A2, L3A2, L4A2, L5A2, L6A2, L7A2, L8A2, TFA2 image side; 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 principal ray;Lm marginal ray;EL extension line;Z3 relay area;M,R intersection point;Z1,L1A1C,L1A2C,L2A1C,L2A2C,L3A1C,L3A2C,L4A1C,L4A2C,L5A1C,L5A2C,L6A1C,L6A2C,L7A1C,L7A2 C, L8A1C, L8A2C optical axis area; Z2, L1A1P, L1A2P, L2A1P, L2A2P, L3A1P, L3A2P, L4A1P, L4A2P, L5A1P, L5A2P, L6A1P, L6A2P, L7A1P, L7A2P, L8A1P, L8A2P circular area; STO aperture; TF filter; IMA imaging surface.

[0081] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person with ordinary knowledge in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0082] 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.

[0083] 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.

[0084] Figure 1 is a radial cross-sectional view of the lens 100. Two reference points on the surface of the lens 100 are defined: a center point and a transition point. The center point of the lens surface is an intersection of the surface and the optical axis I. Figure 1 As shown in the example, the first center point CP1 is located 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).

[0085] 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.

[0086] 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.

[0087] 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.

[0088] See also Figure 2 , define the area between the center point CP and the first transition point TP1 as the optical axis area Z1. Define the area between the first transition point TP1 and the optical boundary OB of the lens surface as the circumferential area Z2. Figure 2 As shown, after passing through the optical axis region Z1, the parallel light 211 intersects with the optical axis I at the image side A2 of the lens 200, that is, the focus of the parallel light 211 passing through the optical axis region Z1 is located at point R on the image side A2 of the lens 200. Since the light intersects with the optical axis I at the image side A2 of the lens 200, the optical axis region Z1 is a convex surface. On the contrary, the parallel light 212 diverges after passing through the circumferential region Z2. Figure 2 As shown, the extended line EL of the parallel light 212 after passing through the circumferential area Z2 intersects with the optical axis I at the object side A1 of the lens 200, that is, the focus of the parallel light 212 passing through the circumferential area Z2 is located at point M on the object side A1 of the lens 200. Since the extended line EL of the light intersects with the optical axis I at the object side A1 of the lens 200, the circumferential area Z2 is a concave surface. Figure 2 In the lens 200 shown, the first transition point TP1 is the boundary between the optical axis area and the circumferential area, that is, the first transition point TP1 is the boundary point where the convex surface turns into the concave surface.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] The optical imaging lens of the present invention has eight lenses arranged along an optical axis from the object side to the image side, and includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens in sequence. The first lens to the eighth lens each include 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 of the present invention can provide a higher resolution while having an increased aperture and image height by designing the following detailed features of each lens.

[0097] The embodiment of the present invention is advantageous in designing a lens with a large aperture and a large image height through the design of the lens refractive power and surface shape, for example: combining the third lens with a positive refractive power, the fifth lens with a concave image side optical axis area, the sixth lens with a concave object side optical axis area, the eighth lens with a convex object side circumferential area, and satisfying Fno*(D12t32+D41t52) / (T1+G34)≦3.300. The preferred range is 1.200≦Fno*(D12t32+D41t52) / (T1+G34)≦3.300. When the optical imaging lens further satisfies the convex object side optical axis area of ​​the fourth lens and the convex object side optical axis area of ​​the fifth lens, it is advantageous in shortening TTL. When the optical imaging lens further satisfies the positive refractive power of the first lens or the negative refractive power of the second lens, it is advantageous in coordinating the surface shape of the third lens and the fourth lens to limit and correct spherical aberration.

[0098] The embodiment of the present invention is conducive to designing a lens with a large aperture and a large image height through the design of the lens refractive power and surface shape, for example: when the third lens has a positive refractive power, the optical axis area of ​​the image side of the fifth lens is concave, the optical axis area of ​​the object side of the sixth lens is concave, and Fno*(D12t32+D41t52) / (T1+G34)≦3.600 is satisfied, the design is conducive to designing a lens with a large aperture and a large image height, and the preferred range is 1.200≦Fno*(D12t32+D41t52) / (T1+G34)≦3.600. When the optical imaging lens further satisfies that the optical axis area of ​​the image side of the fourth lens is concave and the circumferential area of ​​the image side of the fourth lens is convex, it is conducive to shortening TTL. When the optical imaging lens further satisfies that the sixth lens has a positive refractive power and the seventh lens has a positive refractive power, it is conducive to correcting aberrations within the field of view of 0.0 to 0.2. When the optical imaging lens further limits the first lens to have a positive refractive power or the second lens to have a negative refractive power, it is beneficial to cooperate with the surface shapes of the third lens and the fourth lens to limit and correct the spherical aberration.

[0099] The embodiment of the present invention is conducive to designing a lens with a large aperture and a large image height through the design of the lens refractive power and surface shape, for example: when the third lens has a positive refractive power, the fifth lens is concave in the image side optical axis area, the sixth lens is concave in the object side optical axis area, the seventh lens is concave in the image side optical axis area, and Fno*(D12t32+D41t52) / (T1+G34)≦3.300 is satisfied, it is conducive to designing a lens with a large aperture and a large image height, and the preferred range is 1.200≦Fno*(D12t32+D41t52) / (T1+G34)≦3.300. When the optical imaging lens further satisfies that the third lens is convex in the object side circular area, the fourth lens is convex in the object side optical axis area, the fourth lens is convex in the image side circular area, and the fifth lens is convex in the object side optical axis area, it is conducive to shortening TTL. When the optical imaging lens further limits the first lens to have a positive refractive power or the second lens to have a negative refractive power, it is beneficial to cooperate with the surface shapes of the third lens and the fourth lens to limit and correct the spherical aberration.

[0100] When the optical imaging lens of the embodiment of the present invention satisfies Fno*(D12t32+D41t52) / (T1+G34)≦3.300, it is more conducive to designing a lens with a large aperture than when Fno*(D12t32+D41t52) / (T1+G34)≦3.600.

[0101] In the optical imaging lens of the embodiment of the present invention, if at least one of the first lens and the sixth lens has a positive refractive power, it is beneficial to correct the aberration within the field of view of 0.0 to 0.2; if at least one of the second lens and the fourth lens has a negative refractive power, it is beneficial to cooperate with the third lens to correct the aberration.

[0102] When the optical imaging lens of the embodiment of the present invention satisfies (V4+V6+V8) / V5≦2.400, V5+V6≦100.000, V3+V4≦100.000 or V4+V7≦100.000, it is beneficial to improve the modulation transfer function (MTF) of the optical imaging lens to increase the resolution. The preferred range is 1.200≦(V4+V6+V8) / V5≦2.400, 38.000≦V5+V6≦100.000, 38.000≦V3+V4≦100.000 or 38.000≦V4+V7≦100.000.

[0103] When the optical imaging lens of the present invention further satisfies any of the following conditions, it is helpful to maintain the thickness and spacing of each lens at an appropriate value under the premise of providing a lens with a large aperture and a large image height, so as to avoid any parameter being too large and thus being disadvantageous to the overall thinning of the optical imaging lens, or to avoid any parameter being too small and thus affecting assembly or increasing the difficulty of manufacturing:

[0104] ALT*Fno / T1≦6.300, the optimal range is 4.000≦ALT*Fno / T1≦6.300;

[0105] (D12t32+D41t52) / G34≦6.100, the preferred range is 2.400≦(D12t32+D41t52) / G34≦6.100;

[0106] Fno*TTL / (T1+D71t82)≦4.100, the optimal range is 2.400≦Fno*TTL / (T1+D71t82)≦4.100;

[0107] D21t32 / G34≦2.500, the optimal range is 1.100≦D21t32 / G34≦2.500;

[0108] (D21t32+T6+G67) / (T4+G45)≦3.300, the optimal range is 0.900≦(D21t32+T6+G67) / (T4+G45)≦3.300;

[0109] (EPD+ImgH) / ALT≧1.800, the optimal range is 1.800≦(EPD+ImgH) / ALT≦3.000;

[0110] (T6+G67+G78) / T8≦4.500, the optimal range is 0.700≦(T6+G67+G78) / T8≦4.500;

[0111] (G12+D21t32) / T4≦3.600, the optimal range is 2.000≦(G12+D21t32) / T4≦3.600;

[0112] D21t32 / G45≦5.600, the optimal range is 1.200≦D21t32 / G45≦5.600;

[0113] (T5+T6) / G56≦4.900, the optimal range is 0.500≦(T5+T6) / G56≦4.900;

[0114] TL / EPD≦2.000, the optimal range is 1.500≦TL / EPD≦2.000;

[0115] EFL / (T1+G34)≦5.500, the optimal range is 2.600≦EFL / (T1+G34)≦5.500;

[0116] Fno*(T2+T3+T5+T6+G78+BFL) / AAG≦2.900, and the preferred range is 0.900≦Fno*(T2+T3+T5+T6+G78+BFL) / AAG≦2.900.

[0117] In addition, any combination of parameters of the embodiment can be selected to increase the optical imaging lens restrictions, so as to facilitate the design of the optical imaging lens of the same structure of the present invention. In view of the unpredictability of optical system design, under the structure of the present invention, meeting the above conditional formula can better shorten the length of the optical imaging lens of the present invention, increase the image height, improve the imaging quality, or improve the assembly yield, thereby improving the shortcomings of the prior art.

[0118] In order to illustrate that the present invention can indeed provide good optical performance while expanding the field of view, the following provides a number of examples and their detailed optical data. Figures 6 to 9 ,in Figure 6FIG. 1 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 1 according to a first embodiment of the present invention. Figure 7 FIG. 1 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of the optical imaging lens 1 according to the first embodiment of the present invention. Figure 8 Detailed optical data of the optical imaging lens 1 according to the first embodiment of the present invention are shown. Fig. 9 The aspherical surface data of each lens of the optical imaging lens 1 according to the first embodiment of the present invention are shown.

[0119] like Figure 6 As shown, the optical imaging lens 1 of this embodiment includes an aperture stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8 in order from the object side A1 to the image side A2. A filter TF and an imaging surface IMA of an image sensor (not shown) are both disposed on the image side A2 of the optical imaging lens 1. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8 and the filter TF respectively include object-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1, TFA1 facing the object side A1 and image-side surfaces L1A2, L2A2, L3A2, L4A2, L5A2, L6A2, L7A2, L8A2, TFA2 facing the image side A2. In the present embodiment, the filter TF is disposed between the eighth lens L8 and the imaging plane IMA, and may be an infrared cut-off filter for preventing infrared rays in the light from being transmitted to the imaging plane and affecting the imaging quality.

[0120] In this embodiment, the detailed structure of each lens of the optical imaging lens 1 can be referred to the figure. In order to achieve the purpose of lightweight product, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8 can be made of plastic, but are not limited thereto.

[0121] In the first embodiment, the first lens L1 has a positive refractive power. The optical axis region L1A1C and the circumferential region L1A1P of the object side surface L1A1 of the first lens L1 are both convex. The optical axis region L1A2C of the image side surface L1A2 of the first lens L1 is concave, and the circumferential region L1A2P is convex.

[0122] The second lens L2 has a negative refractive power. The optical axis region L2A1C and the circumferential region L2A1P of the object side surface L2A1 of the second lens L2 are both convex surfaces. The optical axis region L2A2C and the circumferential region L2A2P of the image side surface L2A2 of the second lens L2 are both concave surfaces.

[0123] The third lens L3 has a positive refractive power. The optical axis region L3A1C and the circumferential region L3A1P of the object side surface L3A1 of the third lens L3 are both convex. The optical axis region L3A2C of the image side surface L3A2 of the third lens L3 is a concave surface, and the circumferential region L3A2P is a convex surface.

[0124] The fourth lens L4 has a negative refractive power. The optical axis region L4A1C of the object side surface L4A1 of the fourth lens L4 is a convex surface, and the circumferential region L4A1P is a concave surface. The optical axis region L4A2C of the image side surface L4A2 of the fourth lens L4 is a concave surface, and the circumferential region L4A2P is a convex surface.

[0125] The fifth lens L5 has a positive refractive power. The optical axis region L5A1C of the object side surface L5A1 of the fifth lens L5 is a convex surface, and the circumferential region L5A1P is a concave surface. The optical axis region L5A2C of the image side surface L5A2 of the fifth lens L5 is a concave surface, and the circumferential region L5A2P is a convex surface.

[0126] The sixth lens L6 has a positive refractive power. The optical axis region L6A1C and the circumferential region L6A1P of the object-side surface L6A1 of the sixth lens L6 are both concave surfaces. The optical axis region L6A2C and the circumferential region L6A2P of the image-side surface L6A2 of the sixth lens L6 are both convex surfaces.

[0127] The seventh lens L7 has a positive refractive power. The optical axis region L7A1C of the object side surface L7A1 of the seventh lens L7 is a convex surface, and the peripheral region L7A1P is a concave surface. The optical axis region L7A2C of the image side surface L7A2 of the seventh lens L7 is a concave surface, and the peripheral region L7A2P is a convex surface.

[0128] The eighth lens L8 has a negative refractive power. The optical axis region L8A1C of the object side surface L8A1 of the eighth lens L8 is a concave surface, and the circumferential region L8A1P is a convex surface. The optical axis region L8A2C of the image side surface L8A2 of the eighth lens L8 is a concave surface, and the circumferential region L8A2P is a convex surface.

[0129] The object-side surface L1A1 and the image-side surface L1A2 of the first lens L1, the object-side surface L2A1 and the image-side surface L2A2 of the second lens L2, the object-side surface L3A1 and the image-side surface L3A2 of the third lens L3, the object-side surface L4A1 and the image-side surface L4A2 of the fourth lens L4, the object-side surface L5A1 and the image-side surface L5A2 of the fifth lens L5, the object-side surface L6A1 and the image-side surface L6A2 of the sixth lens L6, the object-side surface L7A1 and the image-side surface L7A2 of the seventh lens L7, and the object-side surface L8A1 and the image-side surface L8A2 of the eighth lens L8, a total of 16 aspheric surfaces, are all defined according to the following aspheric surface curve formula (1):

[0130]

[0131] Z represents the depth of the aspheric surface (the vertical distance between the point on the aspheric surface that is Y away from the optical axis and the tangent plane that is tangent to the vertex on the aspheric optical axis); R represents the radius of curvature of the lens surface; Y represents the vertical distance between the point on the aspheric surface and the optical axis; K is the conic constant; a i is the i-th order aspheric coefficient.

[0132] Please refer to the detailed parameters of each aspheric surface. Fig. 9 .

[0133] Figure 7 A is a schematic diagram of longitudinal spherical aberration at three representative wavelengths (470 nm, 555 nm, and 650 nm) of this embodiment, wherein the vertical axis is defined as the field of view. Figure 7 B is a schematic diagram of field curvature aberration in the sagittal direction at three representative wavelengths (470 nm, 555 nm, and 650 nm) of this embodiment, where the vertical axis is defined as image height. Figure 7 FIG. C is a schematic diagram showing field curvature aberration in the tangential direction at three representative wavelengths (470 nm, 555 nm, and 650 nm) of this embodiment, wherein the vertical axis is defined as image height. Figure 7 D is a schematic diagram of the distortion aberration of this embodiment, with the vertical axis being the image height. The off-axis light rays at different heights of the three representative wavelengths (470nm, 555nm, and 650nm) are all concentrated near the imaging point. The curves of each wavelength are very close, indicating that the off-axis light rays at different heights of each wavelength are all concentrated near the imaging point. Figure 7 From the longitudinal spherical aberration of each curve in A, it can be seen that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.0048 to 0.012 mm. Therefore, this embodiment does significantly improve the longitudinal spherical aberration of different wavelengths. In addition, see Figure 7 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -0.02 to 0.03 mm. Figure 7 The field curvature aberration of the three representative wavelengths in the entire field of view ranges from -0.01 to 0.1 mm. Figure 7 On the horizontal axis of D, distortion is maintained within the range of 0 to 20%.

[0134] like Figure 8 As shown, the aperture value (Fno) of the optical imaging lens 1 is 1.500, and the image height (ImgH) is 6.200 mm. Figure 7 The values ​​of various aberrations shown in the figure indicate that the optical imaging lens 1 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0135] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.46 , 47 .

[0136] Please also refer to Figures 10 to 13 ,in Fig.10 FIG. 2 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 2 according to a second embodiment of the present invention. Fig.11 FIG. 4 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of the optical imaging lens 2 according to the second embodiment of the present invention. Fig.12 Detailed optical data of the optical imaging lens 2 according to the second embodiment of the present invention are shown. Fig.13 The aspherical surface data of each lens of the optical imaging lens 2 according to the second embodiment of the present invention are shown.

[0137] like Fig.10 As shown, the optical imaging lens 2 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0138] The concavo-convex configuration of the surfaces of the object-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1 and the image-side surfaces L1A2, L2A2, L4A2, L5A2, L6A2, L7A2 of the second embodiment and the configuration of the refractive power of each lens are substantially similar to those of the first embodiment, but the concavo-convex configuration of the surfaces of the image-side surfaces L3A2 and L8A2 is different from that of the first embodiment. Secondly, the optical parameters of the curvature radius, lens thickness, lens asphericity coefficient and system effective focal length of each lens surface of the second embodiment are also different from those of the first embodiment. Specifically, the circumferential region L3A2P of the image-side surface L3A2 of the third lens L3 is a concave surface, and the circumferential region L8A2P of the image-side surface L8A2 of the eighth lens L8 is a concave surface.

[0139] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 2 of this embodiment, please refer to Fig.12 .

[0140] from Fig.11 From the longitudinal spherical aberration of each curve in A, it can be seen that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.0045 to 0.015 mm. Fig.11 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -0.021 to 0.035 mm. Fig.11 The field curvature aberration of the three representative wavelengths in the entire field of view ranges from -0.014 to 0.07 mm. Fig.11 The distortion aberration of the optical imaging lens 2 is maintained within the range of 0-11%. Compared with the first embodiment, the distortion aberration of this embodiment is smaller.

[0141] like Fig.12 As shown, the aperture value of the optical imaging lens 2 is 1.500 and the image height is 6.200mm. Fig.11 The values ​​of various aberrations shown in the figure indicate that the optical imaging lens 2 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0142] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.46 , 47 .

[0143] Please also refer to Figures 14 to 17 ,in Fig.14 FIG. 4 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 3 according to a third embodiment of the present invention. Fig.15 FIG. 4 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of the optical imaging lens 3 according to the third embodiment of the present invention. Fig.16 Detailed optical data of the optical imaging lens 3 according to the third embodiment of the present invention are shown. Fig.17 The aspherical surface data of each lens of the optical imaging lens 3 according to the third embodiment of the present invention are shown.

[0144] like Fig.14 As shown, the optical imaging lens 3 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0145] The concavo-convex configuration of the surfaces of the object-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1 and the image-side surfaces L2A2, L3A2, L4A2, L5A2, L6A2, L7A2 of the third embodiment and the refractive power configuration of each lens except the fourth lens L4 are substantially similar to those of the first embodiment, however, the concavo-convex configuration of the surfaces of the image-side surfaces L1A2 and L8A2 and the positive refractive power of the fourth lens L4 are different from those of the first embodiment. Secondly, the optical parameters of the curvature radius of each lens surface, lens thickness, lens aspheric coefficient and system effective focal length of the third embodiment are also different from those of the first embodiment. Specifically, the circumferential region L1A2P of the image-side surface L1A2 of the first lens L1 is a concave surface, and the circumferential region L8A2P of the image-side surface L8A2 of the eighth lens L8 is a concave surface.

[0146] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 3 of this embodiment, please refer to Fig.16 .

[0147] from Fig.15 From the longitudinal spherical aberration of each curve in A, it can be seen that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.0084 to 0.014 mm. Fig.15 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -8.4 to 14 μm. Fig.15 The field curvature aberrations of the three representative wavelengths in the entire field of view fall within the range of -8.4 to 12.6 μm. Fig.15 The horizontal axis of D of the optical imaging lens 3 is maintained within the range of 0-13%. Compared with the first embodiment, the field curvature aberration and distortion aberration of the optical imaging lens 3 in the sagittal and tangential directions of the present embodiment are smaller.

[0148] like Fig.16 As shown, the aperture value of the optical imaging lens 3 is 1.750, and the image height is 6.200mm. Fig.15 The values ​​of various aberrations are shown. The optical imaging lens 3 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0149] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.46 , 47 .

[0150] Please also refer to Figures 18 to 21 ,in Fig.18 FIG. 4 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 4 according to a fourth embodiment of the present invention. Fig.19FIG. 4 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of an optical imaging lens 4 according to a fourth embodiment of the present invention. Fig. 20 Detailed optical data of the optical imaging lens 4 according to the fourth embodiment of the present invention are shown. Fig.21 The aspherical surface data of each lens of the optical imaging lens 4 according to the fourth embodiment of the present invention are shown.

[0151] like Fig.18 As shown, the optical imaging lens 4 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0152] The concavo-convex configuration of the surfaces of the object-side surfaces L1A1, L2A1, L3A1, L5A1, L6A1, L7A1, L8A2 and the image-side surfaces L2A2, L4A2, L5A2, L6A2, L7A2 of the fourth embodiment and the refractive power configuration of each lens are substantially similar to those of the first embodiment, however, the concavo-convex configuration of the surfaces of the image-side surfaces L1A2, L3A2, L8A2 and the positive refractive power of the fourth lens L4 are different from those of the first embodiment. In addition, the optical parameters of the curvature radius of each lens surface, lens thickness, lens aspheric coefficient and system effective focal length of the fourth embodiment are also different from those of the first embodiment. Specifically, the circumferential region L1A2P of the image-side surface L1A2 of the first lens L1 is a concave surface, the circumferential region L3A2P of the image-side surface L3A2 of the third lens L3 is a concave surface, and the circumferential region L8A2P of the image-side surface L8A2 of the eighth lens L8 is a concave surface.

[0153] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 4 of this embodiment, please refer to Fig. 20 .

[0154] from Fig.19 The longitudinal spherical aberration of each curve in A shows that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.009 to 0.015 mm. Fig.19 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -9 to 15 μm. Fig.19 C, the three representative wavelengths of field curvature aberrations in the entire field of view range from -9 to 15μm. Fig.19 The horizontal axis of D of the optical imaging lens 4 is maintained within the range of 0 to 8.5%. Compared with the first embodiment, the field curvature aberration and distortion aberration in the sagittal and tangential directions of the present embodiment are smaller.

[0155] like Fig. 20 As shown, the aperture value of the optical imaging lens 4 is 1.800 and the image height is 6.200 mm. Fig.19 The values ​​of various aberrations shown in the figure indicate that the optical imaging lens 4 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0156] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.46 , 47 .

[0157] Please also refer to Figure 22 to Figure 25 ,in Fig. 22 FIG. 4 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 5 according to a fifth embodiment of the present invention. Fig.23 FIG. 5 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of an optical imaging lens 5 according to a fifth embodiment of the present invention. Fig.24 According to the detailed optical data of the optical imaging lens 5 of the fifth embodiment of the present invention, Fig.25 The aspherical surface data of each lens of the optical imaging lens 5 according to the fifth embodiment of the present invention are shown.

[0158] like Fig. 22 As shown, the optical imaging lens 5 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0159] The concavo-convex configuration of the surfaces of the object-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1 and the image-side surfaces L1A2, L2A2, L3A2, L4A2, L5A2, L6A2, L7A2 of the fifth embodiment and the refractive power configuration of each lens except the fourth lens L4 are substantially similar to those of the first embodiment, except that the concavo-convex configuration of the surface of the image-side surface L8A2 and the fourth lens L4 having a positive refractive power are different from those of the first embodiment. In addition, the optical parameters of the curvature radius of each lens surface, lens thickness, lens asphericity coefficient and system effective focal length of the fifth embodiment are also different from those of the first embodiment. Specifically, the circumferential region L8A2P of the image-side surface L8A2 of the eighth lens L8 is a concave surface.

[0160] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 5 of this embodiment, please refer to Fig.24 .

[0161] from Fig.23 The longitudinal spherical aberration of each curve in A shows that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.0038 to 0.019 mm. Fig.23 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -8 to 32μm. Fig.23 C, the three representative wavelengths of field curvature aberrations in the entire field of view range from -16 to 40 μm. Fig.23 The horizontal axis of D of the optical imaging lens 5 is maintained within the range of 0-15%. Compared with the first embodiment, the field curvature aberration and distortion aberration in the sagittal and tangential directions of the present embodiment are smaller.

[0162] like Fig.24 As shown, the aperture value of the optical imaging lens 5 is 1.500 and the image height is 6.200 mm. Fig.23 The values ​​of various aberrations shown in the figure indicate that the optical imaging lens 5 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0163] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.46 , 47 .

[0164] Please also refer to Figure 26 to Figure 29 ,in Fig.26 FIG. 4 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 6 according to a sixth embodiment of the present invention. Fig. 27 FIG. 6 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of an optical imaging lens 6 according to a sixth embodiment of the present invention. Fig.28 According to the detailed optical data of the optical imaging lens 6 of the sixth embodiment of the present invention, Fig.29 The aspherical surface data of each lens of the optical imaging lens 6 according to the sixth embodiment of the present invention are shown.

[0165] like Fig.26 As shown, the optical imaging lens 6 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0166] The concavo-convex configuration of the surfaces of the object-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1 and the image-side surfaces L2A2, L4A2, L5A2, L6A2, L7A2 of the sixth embodiment and the configuration of the refractive power of each lens are substantially similar to those of the first embodiment, however, the concavo-convex configuration of the surfaces of the image-side surfaces L3A2 and L8A2 is different from that of the first embodiment. Secondly, the optical parameters of the curvature radius, lens thickness, lens aspheric coefficient and system effective focal length of each lens surface of the sixth embodiment are also different from those of the first embodiment. Specifically, the circumferential region L1A2P of the image-side surface L1A2 of the first lens L1 is a concave surface, the circumferential region L3A2P of the image-side surface L3A2 of the third lens L3 is a concave surface, and the circumferential region L8A2P of the image-side surface L8A2 of the eighth lens L8 is a concave surface.

[0167] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 6 of this embodiment, please refer to Fig.28 .

[0168] from Fig. 27 From the longitudinal spherical aberration of each curve in A, it can be seen that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.0028 to 0.014 mm. Fig. 27 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -18 to 31.5 μm. Fig. 27 C, the three representative wavelengths of field curvature aberrations in the entire field of view range from -18 to 45μm. Fig. 27 The horizontal axis of D of the optical imaging lens 6 maintains the distortion aberration in the range of 0 to 3.5%. Compared with the first embodiment, the field curvature aberration and distortion aberration in the sagittal and tangential directions of the present embodiment are smaller.

[0169] like Fig.28 As shown, the aperture value of the optical imaging lens 6 is 1.700, and the image height is 5.779mm. Fig. 27 The values ​​of various aberrations shown in the figure indicate that the optical imaging lens 6 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0170] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.48 , 49 .

[0171] Please also refer to Figure 30 to Figure 33 ,in Fig.30 FIG. 4 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 7 according to a seventh embodiment of the present invention. Fig.31 FIG. 4 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of an optical imaging lens 7 according to a seventh embodiment of the present invention. Fig.32 According to the detailed optical data of the optical imaging lens 7 of the seventh embodiment of the present invention, Fig.33 The aspherical surface data of each lens of the optical imaging lens 7 according to the seventh embodiment of the present invention are shown.

[0172] like Fig.30 As shown, the optical imaging lens 7 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0173] The concavoconvex configuration of the object-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1 and the image-side surfaces L1A2, L2A2, L3A2, L4A2, L5A2, L6A2, L7A2, L8A2 of the seventh embodiment and the refractive power configuration of each lens except the fourth lens L4 are substantially similar to those of the first embodiment, but the fourth lens L4 has a positive refractive power which is different from that of the first embodiment. In addition, the optical parameters of the curvature radius of each lens surface, lens thickness, lens asphericity coefficient and system effective focal length of the seventh embodiment are also different from those of the first embodiment.

[0174] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 7 of this embodiment, please refer to Fig.32 .

[0175] from Fig.31 The longitudinal spherical aberration of each curve in A shows that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.0095 to 0.019 mm. Fig.31 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -16 to 20 μm. Fig.31 C, three representative wavelengths of field curvature aberrations in the entire field of view fall within the range of -12 to 40 μm. Fig.31 The horizontal axis of D of the optical imaging lens 7 is maintained within the range of 0-14%. Compared with the first embodiment, the field curvature aberration and distortion aberration in the sagittal and tangential directions of the present embodiment are smaller.

[0176] like Fig.32 As shown, the aperture value of the optical imaging lens 7 is 1.500, and the image height is 6.396mm. Fig.31 The values ​​of various aberrations shown in FIG. 7 show that the optical imaging lens 7 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0177] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.48 , 49 .

[0178] Please also refer to Figure 34 to Figure 37 ,in Fig.34 FIG. 8 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 8 according to an eighth embodiment of the present invention. Fig.35 FIG. 8 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of the optical imaging lens 8 according to the eighth embodiment of the present invention. Fig.36 According to the detailed optical data of the optical imaging lens 8 of the eighth embodiment of the present invention, Fig.37 The aspherical surface data of each lens of the optical imaging lens 8 according to the eighth embodiment of the present invention are shown.

[0179] like Fig.34 As shown, the optical imaging lens 8 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0180] The concavo-convex configuration of the surfaces of the object-side surfaces L1A1, L2A1, L3A1, L6A1, L7A1, L8A1 and the image-side surfaces L2A2, L4A2, L6A2, L7A2, L8A2 and the refractive power configuration of each lens except the fourth lens L4 of the eighth embodiment are substantially similar to those of the first embodiment, however, the concavo-convex configuration of the surfaces of the object-side surfaces L4A1, L5A1 and the image-side surfaces L1A2, L3A2, L5A2 and the fourth lens L4 having a positive refractive power are different from those of the first embodiment. In addition, the optical parameters of the curvature radius of each lens surface, lens thickness, lens asphericity coefficient and system effective focal length of the eighth embodiment are also different from those of the first embodiment. Specifically, the circumferential area L1A2P of the image side surface L1A2 of the first lens L1 is concave, the circumferential area L3A2P of the image side surface L3A2 of the third lens L3 is concave, the circumferential area L4A1P of the object side surface L4A1 of the fourth lens L4 is convex, the circumferential area L5A1P of the object side surface L5A1 of the fifth lens L5 is convex, and the circumferential area L5A2P of the image side surface L5A2 of the fifth lens L5 is concave.

[0181] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 8 of this embodiment, please refer to Fig.36 .

[0182] from Fig.35 From the longitudinal spherical aberration of each curve in A, it can be seen that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.0222 to 0.037 mm. Fig.35 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -0.054 to 0.03 mm. Fig.35 The field curvature aberration of the three representative wavelengths in the entire field of view ranges from -0.03 to 0.06 mm. Fig.35 The distortion aberration of the optical imaging lens 8 is maintained within the range of -7 to 2.8%. Compared with the first embodiment, the distortion aberration of this embodiment is smaller.

[0183] like Fig.36 As shown, the aperture value of the optical imaging lens 8 is 2.229, and the image height is 5.424mm. Fig.35 The values ​​of various aberrations shown in the figure indicate that the optical imaging lens 8 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0184] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.48 , 49 .

[0185] Please also refer to Figures 38 to 41 ,in Fig.38 FIG. 4 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 9 according to a ninth embodiment of the present invention. Fig.39 FIG. 4 is a schematic diagram showing the longitudinal spherical aberration and various aberration diagrams of the optical imaging lens 9 according to the ninth embodiment of the present invention. Fig.40 According to the detailed optical data of the optical imaging lens 9 of the ninth embodiment of the present invention, Fig.41 The aspherical surface data of each lens of the optical imaging lens 9 according to the ninth embodiment of the present invention are shown.

[0186] like Fig.38 As shown, the optical imaging lens 9 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0187] The concavo-convex configuration of the object-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1 and the image-side surfaces L1A2, L2A2, L4A2, L5A2, L6A2, L7A2 of the ninth embodiment and the refractive power configuration of each lens except the fourth lens L4, the fifth lens L5 and the eighth lens L8 are substantially similar to those of the first embodiment, however, the concavo-convex configuration of the image-side surfaces L3A2 and L8A2 and the fourth lens L4 having a positive refractive power, the fifth lens L5 having a negative refractive power and the eighth lens L8 having a positive refractive power are different from those of the first embodiment. In addition, the optical parameters of the curvature radius of each lens surface, the lens thickness, the lens aspheric coefficient and the system effective focal length of the ninth embodiment are also different from those of the first embodiment. Specifically, a circumferential region L3A2P of the image-side surface L3A2 of the third lens L3 is a concave surface, and an optical axis region L8A2C of the image-side surface L8A2 of the eighth lens L8 is a convex surface.

[0188] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 9 of this embodiment, please refer to Fig.40 .

[0189] from Fig.39 From the longitudinal spherical aberration of each curve in A, it can be seen that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.0216 to 0.036 mm. Fig.39 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -0.064 to 0.032 mm. Fig.39 The field curvature aberration of the three representative wavelengths in the entire field of view ranges from -0.064 to 0.08 mm. Fig.39 The distortion aberration of the optical imaging lens 9 is maintained within the range of -2.7% to 9%. Compared with the first embodiment, the distortion aberration of this embodiment is smaller.

[0190] like Fig.40 As shown, the aperture value of the optical imaging lens 9 is 1.432, and the image height is 5.276mm. Fig.39 The values ​​of various aberrations shown in FIG. 1 and FIG. 2 show that the optical imaging lens 9 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0191] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.48 , 49 .

[0192] Please also refer to Figure 42 to Figure 45 ,in Fig.42 FIG. 1 is a schematic diagram showing a lens cross-sectional structure of an optical imaging lens 10 according to a tenth embodiment of the present invention. Fig.43 FIG. 1 is a schematic diagram showing longitudinal spherical aberration and various aberration diagrams of the optical imaging lens 10 according to the tenth embodiment of the present invention. Fig.44 According to the detailed optical data of the optical imaging lens 10 of the tenth embodiment of the present invention, Fig.45 The aspherical surface data of each lens of the optical imaging lens 10 according to the tenth embodiment of the present invention are shown.

[0193] like Fig.42 As shown, the optical imaging lens 10 of this embodiment includes, from the object side A1 to the image side A2, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0194] The concavo-convex configuration of the object-side surfaces L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, L7A1, L8A1 and the image-side surfaces L2A2, L4A2, L5A2, L6A2, L7A2 of the tenth embodiment and the refractive power configuration of each lens except the fourth lens L4, the sixth lens L6, the seventh lens L7 and the eighth lens L8 are substantially similar to those of the first embodiment, however, the concavo-convex configuration of the image-side surfaces L1A2, L3A2, L8A2 and the fourth lens L4 having a positive refractive power, the sixth lens L6 having a negative refractive power, the seventh lens L7 having a negative refractive power and the eighth lens L8 having a positive refractive power are different from those of the first embodiment. In addition, the optical parameters of the curvature radius of each lens surface, the lens thickness, the lens aspheric coefficient and the system effective focal length of the tenth embodiment are also different from those of the first embodiment. Specifically, the circumferential area L1A2P of the image side surface L1A2 of the first lens L1 is concave, the circumferential area L3A2P of the image side surface L3A2 of the third lens L3 is concave, and the optical axis area L8A2C of the image side surface L8A2 of the eighth lens L8 is convex.

[0195] In order to more clearly illustrate the drawings of this embodiment, the features of the concavo-convex configuration of the lens surface are only marked with the differences from the first embodiment, and the labels of the same parts are omitted. For the optical characteristics of each lens of the optical imaging lens 10 of this embodiment, please refer to Fig.44 .

[0196] from Fig.43 From the longitudinal spherical aberration of each curve in A, it can be seen that the deviation of the imaging point of off-axis light at different heights is controlled within the range of -0.012 to 0.015 mm. Fig.43 B, the field curvature aberration of the three representative wavelengths in the entire field of view ranges from -21 to 24.5 μm. Fig.43 C, the three representative wavelengths of field curvature aberrations in the entire field of view range from -10.5 to 35μm. Fig.43 The distortion aberration of the optical imaging lens 10 is maintained within the range of -3.0% to 7.5%. Compared with the first embodiment, the field curvature aberration and distortion aberration in the sagittal direction of the present embodiment are smaller.

[0197] like Fig.44 As shown, the aperture value of the optical imaging lens 10 is 1.748, and the image height is 5.975 mm. Fig.43 The values ​​of various aberrations shown in the figure indicate that the optical imaging lens 10 of this embodiment can increase the aperture and image height while taking into account the imaging quality.

[0198] Regarding the parameters of this embodiment and Fno*(D12t32+D41t52) / (T1+G34), ALT*Fno / T1, (D12t32+D41t52) / G34, (V4+V6+V8) / V5, Fno*TTL / (T1+D71t82), D21t32 / G34, (D21t32+T6+G67) / (T4+G45), ( For the values ​​of EPD+ImgH) / ALT, (T6+G67+G78) / T8, (G12+D21t32) / T4, D21t32 / G45, (T5+T6) / G56, V5+V6, V3+V4, V4+V7, TL / EPD, EFL / (T1+G34) and Fno*(T2+T3+T5+T6+G78+BFL) / AAG, please refer to Fig.46 , 47 , 48, 49.

[0199] The longitudinal spherical aberration, field curvature aberration, and distortion of each embodiment of the present invention all meet the use specifications. In addition, the off-axis light rays of the three representative wavelengths at different heights are all concentrated near the imaging point. From the deflection amplitude of each curve, it can be seen that the imaging point deviation 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 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 present invention has good optical performance.

[0200] In view of the unpredictability of optical system design, under the framework of the present invention, meeting the above conditions can better shorten the length of the lens of the present invention, reduce the spherical aberration, aberration and distortion of the optical system, increase the image height of the optical imaging system and improve the imaging quality, or improve the assembly yield to improve the shortcomings of the prior art.

[0201] 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 number. 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:

[0202] (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.

[0203] (2) The comparative relationship between optical parameters, for example: A is greater than B or A is less than B.

[0204] (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.

[0205] 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.

[0206] 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.

[0207] The above description is based on a number of different embodiments of the present invention, wherein each feature may be implemented singly or in different combinations. Therefore, the disclosure of the embodiments of the present invention is a specific example of the principles of the present invention, and the present invention should not be limited to the disclosed embodiments. Furthermore, the above description and the accompanying drawings are only for the purpose of illustrating the present invention and are not intended to be limiting. Other variations or combinations of components are possible without violating the spirit and scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The invention comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence from an object side to an image side along an optical axis, each lens having an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein: The first lens has a positive refractive power, an optical axis region of the object side surface of the first lens is a convex surface, a circumferential region of the object side surface of the first lens is a convex surface, and an optical axis region of the image side surface of the first lens is a concave surface; The second lens has a negative refractive power, an optical axis region of the object side surface of the second lens is a convex surface, a circumferential region of the object side surface of the second lens is a convex surface, an optical axis region of the image side surface of the second lens is a concave surface, and a circumferential region of the image side surface of the second lens is a concave surface; 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, a circumferential region of the object side surface of the third lens is a convex surface, and an optical axis region of the image side surface of the third lens is a concave surface; An optical axis region of the object side surface of the fourth lens is a convex surface, an optical axis region of the image 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 convex surface; An optical axis region of the object-side surface of the fifth lens is a convex surface, and 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 sixth lens is a concave 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 convex surface, and a circumferential 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 seventh lens is a convex surface, a circumferential region of the object side surface of the seventh lens is a concave surface, an optical axis region of the image side surface of the seventh lens is a concave surface, and a circumferential region of the image side surface of the seventh lens is a convex surface; A circumferential area of ​​the object-side surface of the eighth lens is a convex surface, and an optical axis area of ​​the object-side surface of the eighth lens is a concave surface; When the lens surface has at least one conversion point, the optical axis area is the range from the center point to the first conversion point, the circumferential area is defined as the area from the Nth conversion point farthest from the optical axis to the optical boundary in radial direction, the center point is an intersection point of the lens surface and the optical axis, the conversion point is a point located on the lens surface, and the tangent of the point is perpendicular to the optical axis, wherein N is greater than zero; and the optical boundary is a point where the edge ray passing through the radially outermost side of the lens surface intersects with the lens surface; when the lens surface has no conversion point, that is, N is equal to zero, the circumferential area is defined as 50%-100% of the distance from the optical axis to the optical boundary of the lens surface; The optical imaging lens has only the above eight lenses and satisfies Fno*(D12t32+D41t52) / (T1+G34)≦3.300 and Fno*(T2+T3+T5+T6+G78+BFL) / AAG≦2.900, where Fno represents the aperture value of the optical imaging lens, D12t32 represents the distance from the image side surface of the first lens to the image side surface of the third lens on the optical axis, D41t52 represents the distance from the object side surface of the fourth lens to the image side surface of the fifth lens on the optical axis, and T1 represents the distance from the first lens to the image side surface of the fifth lens on the optical axis. G34 represents the air gap between the third lens and the fourth lens on the optical axis; T2 represents the thickness of the second lens on the optical axis, T3 represents the thickness of the third lens on the optical axis, T5 represents the thickness of the fifth lens on the optical axis, T6 represents the thickness of the sixth lens on the optical axis, G78 represents the air gap between the seventh lens and the eighth lens on the optical axis, BFL represents the distance from the image side surface of the eighth lens to an imaging surface on the optical axis, and AAG represents the sum of the seven air gaps from the first lens to the eighth lens on the optical axis.

2. An optical imaging lens, characterized in that: The invention comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence from an object side to an image side along an optical axis, each lens having an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein: The first lens has a positive refractive power, an optical axis region of the object side surface of the first lens is a convex surface, a circumferential region of the object side surface of the first lens is a convex surface, and an optical axis region of the image side surface of the first lens is a concave surface; The second lens has a negative refractive power, an optical axis region of the object side surface of the second lens is a convex surface, a circumferential region of the object side surface of the second lens is a convex surface, an optical axis region of the image side surface of the second lens is a concave surface, and a circumferential region of the image side surface of the second lens is a concave surface; 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, a circumferential region of the object side surface of the third lens is a convex surface, and an optical axis region of the image side surface of the third lens is a concave surface; An optical axis region of the image-side surface of the fourth lens is a concave surface, a circumferential region of the image-side surface of the fourth lens is a convex surface, and an optical axis region of the object-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, and an optical axis region of the object-side surface of the fifth lens is a convex surface; The sixth lens has a positive refractive power, an optical axis region of the object side surface of the sixth lens is a concave 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 convex surface, and a circumferential region of the image side surface of the sixth lens is a convex surface; The seventh lens has a positive refractive power, an optical axis region of the object side surface of the seventh lens is a convex surface, a circumferential region of the object side surface of the seventh lens is a concave surface, an optical axis region of the image side surface of the seventh lens is a concave surface, and a circumferential region of the image side surface of the seventh lens is a convex surface; An optical axis region of the object-side surface of the eighth lens is a concave surface, and a circumferential region of the object-side surface of the eighth lens is a convex surface; The optical imaging lens has only the above eight lenses and satisfies Fno*(D12t32+D41t52) / (T1+G34)≦3.600 and Fno*(T2+T3+T5+T6+G78+BFL) / AAG≦2.900, where Fno represents the aperture value of the optical imaging lens, D12t32 represents the distance from the image side surface of the first lens to the image side surface of the third lens on the optical axis, D41t52 represents the distance from the object side surface of the fourth lens to the image side surface of the fifth lens on the optical axis, and T1 represents the distance from the first lens to the image side surface of the third lens on the optical axis. G34 represents the air gap between the third lens and the fourth lens on the optical axis; T2 represents the thickness of the second lens on the optical axis, T3 represents the thickness of the third lens on the optical axis, T5 represents the thickness of the fifth lens on the optical axis, T6 represents the thickness of the sixth lens on the optical axis, G78 represents the air gap between the seventh lens and the eighth lens on the optical axis, BFL represents the distance from the image side surface of the eighth lens to an imaging surface on the optical axis, and AAG represents the sum of the seven air gaps from the first lens to the eighth lens on the optical axis.

3. An optical imaging lens, characterized in that: The invention comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence from an object side to an image side along an optical axis, each lens having an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein: The first lens has a positive refractive power, an optical axis region of the object side surface of the first lens is a convex surface, a circumferential region of the object side surface of the first lens is a convex surface, and an optical axis region of the image side surface of the first lens is a concave surface; The second lens has a negative refractive power, an optical axis region of the object side surface of the second lens is a convex surface, a circumferential region of the object side surface of the second lens is a convex surface, an optical axis region of the image side surface of the second lens is a concave surface, and a circumferential region of the image side surface of the second lens is a concave surface; The third lens has a positive refractive power, a circumferential area of ​​the object side surface of the third lens is a convex surface, an optical axis area of ​​the object side surface of the third lens is a convex surface, and an optical axis area of ​​the image side surface of the third lens is a concave surface; An optical axis region of the object side surface of the fourth lens is a convex surface, a circumferential region of the image side surface of the fourth lens is a convex surface, and an optical axis region of the image side surface of the fourth lens is a concave surface; An optical axis region of the object-side surface of the fifth lens is a convex surface, and 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 sixth lens is a concave 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 convex surface, and a circumferential region of the image side surface of the sixth lens is a convex surface; An optical axis region of the image-side surface of the seventh lens is a concave surface, an optical axis region of the object-side surface of the seventh lens is a convex surface, a circumferential region of the object-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; An optical axis region of the object-side surface of the eighth lens is a concave surface, and a circumferential region of the object-side surface of the eighth lens is a convex surface; The optical imaging lens has only the above eight lenses and satisfies Fno*(D12t32+D41t52) / (T1+G34)≦3.300 and Fno*(T2+T3+T5+T6+G78+BFL) / AAG≦2.900, where Fno represents the aperture value of the optical imaging lens, D12t32 represents the distance from the image side surface of the first lens to the image side surface of the third lens on the optical axis, D41t52 represents the distance from the object side surface of the fourth lens to the image side surface of the fifth lens on the optical axis, and T1 represents the distance from the first lens to the image side surface of the fifth lens on the optical axis. G34 represents the air gap between the third lens and the fourth lens on the optical axis; T2 represents the thickness of the second lens on the optical axis, T3 represents the thickness of the third lens on the optical axis, T5 represents the thickness of the fifth lens on the optical axis, T6 represents the thickness of the sixth lens on the optical axis, G78 represents the air gap between the seventh lens and the eighth lens on the optical axis, BFL represents the distance from the image side surface of the eighth lens to an imaging surface on the optical axis, and AAG represents the sum of the seven air gaps from the first lens to the eighth lens on the optical axis.

4. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein ALT represents the total thickness of eight lenses including the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens on the optical axis, and the optical imaging lens satisfies the conditional formula: ALT*Fno / T1≦6.

300.

5. The optical imaging lens according to any one of claims 1 to 3, characterized in that: The optical imaging lens satisfies the condition: (D12t32+D41t52) / G34≦6.

100.

6. The optical imaging lens according to any one of claims 1 to 3, wherein: Wherein V4 represents the Abbe number of the fourth lens, V6 represents the Abbe number of the sixth lens, V8 represents the Abbe number of the eighth lens, and V5 represents the Abbe number of the fifth lens. The optical imaging lens satisfies the conditional formula: (V4+V6+V8) / V5≦2.

400.

7. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein TTL represents the distance from the object side surface of the first lens to the imaging surface on the optical axis, D71t82 represents the distance from the object side surface of the seventh lens to the image side surface of the eighth lens on the optical axis, and the optical imaging lens satisfies the conditional formula: Fno*TTL / (T1+D71t82)≦4.

100.

8. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein D21t32 represents the distance from the object side surface of the second lens to the image side surface of the third lens on the optical axis, and the optical imaging lens satisfies the conditional formula: D21t32 / G34≦2.

500.

9. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein D21t32 represents the distance from the object side surface of the second lens to the image side surface of the third lens on the optical axis, G67 represents the air gap from the sixth lens to the seventh lens on the optical axis, T4 represents the thickness of the fourth lens on the optical axis, G45 represents the distance from the image side surface of the fourth lens to the object side surface of the fifth lens on the optical axis, and the optical imaging lens satisfies the conditional formula: (D21t32+T6+G67) / (T4+G45)≦3.

300.

10. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein EPD represents an entrance pupil diameter of the optical imaging lens, ImgH represents an image height of the optical imaging lens, ALT represents a total thickness of eight lenses including the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens on the optical axis, and the optical imaging lens satisfies a conditional formula: (EPD+ImgH) / ALT≧1.

800.

11. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein G67 represents the air gap between the sixth lens and the seventh lens on the optical axis, T8 represents the thickness of the eighth lens on the optical axis, and the optical imaging lens satisfies the condition: (T6+G67+G78) / T8≦4.

500.

12. The optical imaging lens according to any one of claims 1 to 3, wherein: Wherein G12 represents the air gap between the first lens and the second lens on the optical axis, D21t32 represents the distance from the object side surface of the second lens to the image side surface of the third lens on the optical axis, T4 represents the thickness of the fourth lens on the optical axis, and the optical imaging lens satisfies the conditional formula: (G12+D21t32) / T4≦3.

600.

13. The optical imaging lens according to any one of claims 1 to 3, wherein: Wherein D21t32 represents the distance from the object side surface of the second lens to the image side surface of the third lens on the optical axis, G45 represents the air gap from the fourth lens to the fifth lens on the optical axis, and the optical imaging lens satisfies the conditional formula: D21t32 / G45≦5.

600.

14. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein G56 represents the air gap between the fifth lens and the sixth lens on the optical axis, and the optical imaging lens satisfies the condition: (T5+T6) / G56≦4.

900.

15. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein V5 represents the Abbe number of the fifth lens, V6 represents the Abbe number of the sixth lens, and the optical imaging lens satisfies the conditional formula: V5+V6≦100.

000.

16. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein V3 represents the Abbe number of the third lens, V4 represents the Abbe number of the fourth lens, and the optical imaging lens satisfies the condition: V3+V4≦100.

000.

17. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein V4 represents the Abbe number of the fourth lens, V7 represents the Abbe number of the seventh lens, and the optical imaging lens satisfies the conditional formula: V4+V7≦100.

000.

18. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein TL represents the distance from the object side surface of the first lens to the image side surface of the eighth lens on the optical axis, EPD represents the entrance pupil diameter of the optical imaging lens, and the optical imaging lens satisfies the conditional formula: TL / EPD≦2.

000.

19. The optical imaging lens according to any one of claims 1 to 3, characterized in that: Wherein EFL represents the effective focal length of the optical imaging lens, and the optical imaging lens satisfies the condition: EFL / (T1+G34)≦5.500.

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