Optical imaging lens

Abstract

An optical imaging lens comprises, sequentially from the object side to the image side along the optical axis, a first lens to a ninth lens, each lens including an object side and an image side. The circumferential region of the image side of the first lens is concave, and the circumferential region of the object side of the ninth lens is concave. The optical imaging lens has only the above nine lenses, satisfying the following conditions: Fno*(D11t51+D62t82) / D51t62≦6.300, υ3+υ9≦100.000, the air gap between the fourth and fifth lenses on the optical axis being smaller than the air gap between the eighth and ninth lenses on the optical axis, the Abbe number of the first lens being greater than the Abbe number of the eighth lens, the Abbe number of the first lens being greater than the Abbe number of the ninth lens, and the thickness of the first lens on the optical axis being greater than the air gap between the sixth and seventh lenses on the optical axis.

Description

Optical imaging lens This invention generally relates to an optical imaging lens. Specifically, this invention is particularly directed to an optical imaging lens primarily used for capturing images and recording videos, and applicable to portable electronic products, such as mobile phones, head-mounted devices (AR, VR, MR), tablet computers, personal digital assistants (PDAs), and other electronic devices. The specifications of portable electronic devices are constantly evolving, and their key components—optical imaging lenses—are also becoming more diverse. The main lens for portable electronic devices not only requires a larger aperture and a shorter system length, but also demands higher pixels and higher resolution. High pixels imply an increase in the lens's image height, achieved by using a larger image sensor to receive imaging light and thus increase the pixel requirement. However, the large aperture design allows the lens to receive more imaging light, increasing the design complexity; while high pixel count requires higher lens resolution, which, combined with the large aperture design, doubles the design difficulty. Therefore, how to incorporate multiple lenses within a limited system length, while simultaneously increasing resolution, aperture, and image height, is a challenging problem that needs to be solved. Therefore, various embodiments of the present invention propose a nine-element optical imaging lens that features a small aperture value, a large image height, improved resolution, maintained good image quality, and is technically feasible. The nine-element optical imaging lens of the present invention comprises, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged sequentially on the optical axis. Each of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses 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. In one embodiment of the present invention, the circumferential region of the image-side surface of the first lens and the circumferential region of the object-side surface of the ninth lens are both concave. The optical imaging lens has only the above nine lenses, and satisfies Fno*(D11t51+D62t82) / D51t62≦6.300, υ3+υ9≦100.000, the air gap between the fourth and fifth lenses on the optical axis is smaller than the air gap between the eighth and ninth lenses on the optical axis, the Abbe number of the first lens is greater than the Abbe number of the eighth lens, the Abbe number of the first lens is greater than the Abbe number of the ninth lens, and the thickness of the first lens on the optical axis is greater than the air gap between the sixth and seventh lenses on the optical axis. In another embodiment of the present invention, the circumferential region of the image-side surface of the first lens is concave, and the circumferential region of the object-side surface of the ninth lens is concave. The optical imaging lens has only the above nine lenses, and satisfies Fno*(D11t51+D62t82) / D51t62≦6.300, υ3+υ9≦100.000, the thickness of the seventh lens on the optical axis is greater than the air gap between the second and third lenses on the optical axis, the air gap between the fourth and fifth lenses on the optical axis is less than the air gap between the sixth and seventh lenses on the optical axis, the Abbe number of the first lens is greater than the Abbe number of the eighth lens, the Abbe number of the first lens is greater than the Abbe number of the ninth lens, and the thickness of the first lens on the optical axis is greater than the air gap between the sixth and seventh lenses on the optical axis. In another embodiment of the present invention, the circumferential region of the image-side surface of the first lens is concave, and the circumferential region of the object-side surface of the ninth lens is concave. The optical imaging lens has only the above nine lenses, and satisfies Fno*(D11t51+D62t82) / D51t62≦6.300, Fno*(ALT+BFL) / AAG≦3.700, υ4+υ9≦100.000, the air gap between the fourth and fifth lenses on the optical axis is smaller than the air gap between the sixth and seventh lenses on the optical axis, the Abbe number of the first lens is greater than the Abbe number of the eighth lens, and the Abbe number of the first lens is greater than the Abbe number of the ninth lens. In another embodiment of the present invention, the circumferential region of the image-side surface of the first lens is concave, and the circumferential region of the object-side surface of the ninth lens is concave. The optical imaging lens has only the above nine lenses, and satisfies (D62t82+G89+T9) / D51t62≦2.400, the air gap between the second and third lenses on the optical axis is smaller than the air gap between the fifth and sixth lenses on the optical axis, the air gap between the fourth and fifth lenses on the optical axis is smaller than the air gap between the eighth and ninth lenses on the optical axis, the Abbe number of the first lens is greater than the Abbe number of the eighth lens, the Abbe number of the first lens is greater than the Abbe number of the ninth lens, the Abbe number of the sixth lens is greater than the Abbe number of the ninth lens, and the thickness of the first lens on the optical axis is greater than the air gap between the sixth and seventh lenses on the optical axis. In another embodiment of the present invention, the circumferential region of the image-side surface of the first lens is concave, and the circumferential region of the object-side surface of the ninth lens is concave. The optical imaging lens has only the above nine lenses, and satisfies (D62t82+G89+T9) / D51t62≦2.400, the air gap between the second and third lenses on the optical axis is smaller than the air gap between the fifth and sixth lenses on the optical axis, the air gap between the fourth and fifth lenses on the optical axis is smaller than the air gap between the eighth and ninth lenses on the optical axis, the Abbe number of the first lens is greater than the Abbe number of the eighth lens, the Abbe number of the first lens is greater than the Abbe number of the ninth lens, the air gap between the third and fourth lenses on the optical axis is greater than the air gap between the fourth and fifth lenses on the optical axis, and the thickness of the first lens on the optical axis is greater than the air gap between the sixth and seventh lenses on the optical axis. In the optical imaging lens of the present invention, the following conditions may also be selectively satisfied in various embodiments: (G23+G34) / |G23-G34|≧4.400; 1.900≦(G56+T6) / (G45+T5); D62t92 / (G56+T6)≦5.100; (D11t32+G45+T5) / (G34+T4)≦2.800; (D11t22+D62t82) / (G34+T4)≦3.400; (D11t22+D62t82) / (G23+T3)≦4.100; D11t22 / G23≦2.700; υ6+υ7+υ8+υ9≦175.000; (υ4+υ5+υ8) / υ9≦5.800; υ4+υ9≦100.000; (D11t22+D41t52) / D22t41≦2.000; 6.100≦(EPD+TTL) / D62t82; (D11t22+D41t52+D61t8​​2) / D22t41≦4.000; 7.000≦(ImgH+TL) / D62t82; 10.000≦(EFL+ImgH) / D11t22. Where T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, T6 is the thickness of the sixth lens on the optical axis, and T9 is the thickness of the ninth lens on the optical axis. υ3 is the Abbe number of the third lens, υ4 is the Abbe number of the fourth lens, υ5 is the Abbe number of the fifth lens, υ6 is the Abbe number of the sixth lens, υ7 is the Abbe number of the seventh lens, υ8 is the Abbe number of the eighth lens, and υ9 is the Abbe number of the ninth lens. G23 is the air gap between the second and third lenses on the optical axis; G34 is the air gap between the third and fourth lenses on the optical axis; G45 is the air gap between the fourth and fifth lenses on the optical axis; G56 is the air gap between the fifth and sixth lenses on the optical axis; and G89 is the air gap between the eighth and ninth lenses on the optical axis. D11t22 is the distance on the optical axis from the object side of the first lens to the image side of the second lens; D41t52 is the distance on the optical axis from the object side of the fourth lens to the image side of the fifth lens; D22t41 is the distance on the optical axis from the image side of the second lens to the object side of the fourth lens; D11t51 is the distance on the optical axis from the object side of the first lens to the object side of the fifth lens; D62t82 is the distance on the optical axis from the image side of the sixth lens to the image side of the eighth lens; D51t62 is the distance on the optical axis from the object side of the fifth lens to the image side of the sixth lens; D61t82 is the distance on the optical axis from the object side of the sixth lens to the image side of the eighth lens; D62t92 is the distance on the optical axis from the image side of the sixth lens to the image side of the ninth lens; D11t32 is the distance on the optical axis from the object side of the first lens to the image side of the third lens. TTL is the distance on the optical axis from the object side of the first lens to the image surface; BFL is the distance on the optical axis from the image side of the ninth lens to the image surface; ALT is the sum of the nine thicknesses on the optical axis from the first lens to the ninth lens; AAG is the sum of the eight air gaps on the optical axis from the first lens to the ninth lens; EPD is the entrance pupil diameter of the optical imaging lens; TL is the distance on the optical axis from the object side of the first lens to the image side of the ninth lens; EFL is the effective focal length of the optical imaging lens; Fno is the aperture value of the optical imaging lens; and ImgH is the image height of the optical imaging lens. 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. The optical system described in this specification includes at least one lens that receives imaging rays incident on the optical system, ranging from parallel to the optical axis to within a half-angle of view (HFOV) relative to the optical axis. The imaging rays are imaged on an imaging plane by the optical system. The statement "a lens has a positive (or negative) refractive index" means that the paraxial refractive index of the lens, calculated using Gaussian optics theory, is positive (or negative). The statement "object-side (or image-side) of the lens" is defined as the specific range through which the imaging rays pass on the lens surface. The imaging rays include at least two types of rays: the chief ray (Lc) and the marginal ray (Lm) (as shown in Figure 1). The object-side (or image-side) of the lens may be divided into different regions depending on its location, including the optical axis region, the circumferential region, or one or more relay regions in some embodiments, which will be described in detail below. Figure 1 is a radial sectional view of lens 100. Two reference points are defined on the surface of lens 100: 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. As illustrated in Figure 1, the first center point CP1 is located on the object-side surface 110 of lens 100, and the second center point CP2 is located on the image-side surface 120 of lens 100. A transition point is a point on the lens surface whose tangent is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the outermost radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the surface of lens 100 may have no transition points or at least one transition point. If a single lens surface has multiple transition points, these transition points are named sequentially from the first transition point in the radially outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (as shown in Figure 4), and the Nth transition point (farthest from the optical axis I). When the lens surface has at least one transition point, the region from the center point to the first transition point TP1 is defined as the optical axis region, which includes the center point. The region radially outward from the transition point farthest from optical axis I (the Nth transition point) to the optical boundary OB is defined as the circumferential region. In some embodiments, a relay region may be included between the optical axis region and the circumferential region; the number of relay regions depends on the number of transition points. When the lens surface has no transition points, 0% to 50% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the optical axis region, and 50% to 100% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the circumferential region. When a ray parallel to optical axis I passes through a region, if the ray bends towards optical axis I and the intersection point with optical axis I is located on the image side A2 of the lens, then that region is a convex surface. When a ray parallel to optical axis I passes through a region, if the extension of the ray intersects optical axis I at the object side A1 of the lens, then that region is a concave surface. In addition, referring to Figure 1, lens 100 may also include an assembly portion 130 extending radially outward from optical boundary OB. Assembly portion 130 is generally used for assembling lens 100 to a corresponding element (not shown) in an optical system. Imaging rays do not reach assembly portion 130. The structure and shape of assembly portion 130 are merely illustrative examples of the invention and are not intended to limit the scope of the invention. Assembly portion 130 of the lens discussed below may be partially or entirely omitted in the figures. Referring to Figure 2, the region between the center point CP and the first conversion point TP1 is defined as the optical axis region Z1. The region between the first conversion point TP1 and the optical boundary OB of the lens surface is defined as the circumferential region Z2. As shown in Figure 2, after passing through the optical axis region Z1, the parallel ray 211 intersects the optical axis I on the image side A2 of the lens 200, meaning the focal point of the parallel ray 211 passing through the optical axis region Z1 is located at point R on the image side A2 of the lens 200. Since the ray intersects the optical axis I on the image side A2 of the lens 200, the optical axis region Z1 is convex. Conversely, the parallel ray 212 diverges after passing through the circumferential region Z2. As shown in Figure 2, the extension line EL of the parallel ray 212 after passing through the circumferential region Z2 intersects the optical axis I on the object side A1 of the lens 200, meaning the focal point of the parallel ray 212 passing through the circumferential region Z2 is located at point M on the object side A1 of the lens 200. Since the extension line EL of the light ray intersects the optical axis I at the object side A1 of the lens 200, the circumferential region Z2 is concave. In the lens 200 shown in Figure 2, the first conversion point TP1 is the boundary between the optical axis region and the circumferential region, that is, the first conversion point TP1 is the boundary point between the convex surface and the concave surface. On the other hand, the convexity / concavity of the optical axis region can also be determined using the method commonly used by those knowledgeable in the field: judging the convexity / concavity of the lens's optical axis region by the sign of the paraxial radius of curvature (R-value). The R-value is commonly used in optical design software, such as Zemax or CodeV. It is also frequently found in lens data sheets within optical design software. For the object-side, a positive R-value indicates a convex optical axis region, while a negative R-value indicates a concave optical axis region. Conversely, for the image-side, a positive R-value indicates a concave optical axis region, while a negative R-value indicates a convex optical axis region. This method yields results consistent with the aforementioned method using the intersection of a ray / ray extension with the optical axis, where the focal point of a ray parallel to the optical axis is located on either the object-side or image-side of the lens to determine the convexity / concavity. The terms "a region is convex (or concave)," "a region is convex (or concave)," or "a convex (or concave) region" used in this specification may be used interchangeably. Figures 3 to 5 provide examples of determining the surface shape and region boundaries of the lens region in various situations, including the aforementioned optical axis region, circumferential region, and relay region. Figure 3 is a radial sectional view of lens 300. Referring to Figure 3, the image-side surface 320 of lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis region Z1 and the circumferential region Z2 of the image-side surface 320 of lens 300 are shown in Figure 3. The R value of this image-side surface 320 is positive (i.e., R > 0), therefore, the optical axis region Z1 is concave. Generally, the surface shape of each region bounded by the transition point will be opposite to that of the adjacent region. Therefore, the transition point can be used to define the change in surface shape, that is, from the transition point, the surface changes from concave to convex or from convex to concave. In Figure 3, since the optical axis region Z1 is concave, and the surface shape changes at the transition point TP1, the circumferential region Z2 is convex. Figure 4 is a radial cross-sectional view of lens 400. Referring to Figure 4, the object-side surface 410 of lens 400 has a first conversion point TP1 and a second conversion point TP2. The area between the optical axis I and the first conversion point TP1 is defined as the optical axis region Z1 of the object-side surface 410. The R value of this object-side surface 410 is positive (i.e., R > 0), therefore, the optical axis region Z1 is a convex surface. The area between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 is defined as a circumferential region Z2, which is also a convex surface. In addition, the area between the first conversion point TP1 and the second conversion point TP2 is defined as a relay region Z3, which is also a concave surface. Referring again to Figure 4, the object side surface 410, radially outward from the optical axis I, sequentially includes the optical axis region Z1 between the optical axis I and the first conversion point TP1, the relay region Z3 between the first conversion point TP1 and the second conversion point TP2, and the 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 convex, and its surface shape changes from the first conversion point TP1 to concave, the relay region Z3 is concave. Furthermore, its surface shape changes back to convex from the second conversion point TP2, so the circumferential region Z2 is convex. Figure 5 is a radial sectional view of lens 500. The object-side surface 510 of lens 500 has no transition point. For a lens surface without a transition point, such as the object-side surface 510 of lens 500, the optical axis region is defined as 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface, and the circumferential region is defined as 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface. Referring to the lens 500 shown in Figure 5, the optical axis region Z1 of the object-side surface 510 is defined as 50% of the distance from the optical axis I to the optical boundary OB of the lens surface. The R value of this object-side surface 510 is positive (i.e., R > 0), therefore, the optical axis region Z1 is convex. Since the object-side surface 510 of lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. Lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2. As shown in Figure 6, the optical imaging lens 1 of this invention, from the object side A1 where the object (not shown) is placed to the image side A2 where the image is formed, along the optical axis I, is mainly composed of nine lenses, sequentially including a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, a sixth lens 60, a seventh lens 70, an eighth lens 80, a ninth lens 90, and an image plane 4. Generally, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60, the seventh lens 70, the eighth lens 80, and the ninth lens 90 can all be made of transparent plastic material, but this invention is not limited to this. The optical imaging lens 1 of this invention contains only nine lenses in total: the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60, the seventh lens 70, the eighth lens 80, and the ninth lens 90. Optical axis I is the optical axis of the entire optical imaging lens 1, so the optical axis of each lens is the same as the optical axis of optical imaging lens 1. Furthermore, the optical imaging lens 1 also includes an aperture stop 2, which is positioned appropriately. In Figure 6, the aperture stop 2 is positioned before the image side A2 of the first lens 10; in other words, the first lens 10 is positioned between the aperture stop 2 and the second lens 20. When light emitted from the object to be photographed (not shown) located on the object side A1 enters the optical imaging lens 1 of the present invention, it passes sequentially through the aperture stop 2, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60, the seventh lens 70, the eighth lens 80, the ninth lens 90, and the filter 3. The light is then focused on the imaging surface 4 on the image side A2 to form a clear image. In various embodiments of the present invention, the filter 3 is positioned between the ninth lens 90 and the imaging surface 4. It can be a filter with various suitable functions, such as an infrared cut-off filter, which is used to prevent infrared rays in the imaging light from being transmitted to the imaging surface 4 and affecting the image quality. Each lens in the optical imaging lens 1 of the present invention has an object-side surface facing the object side A1 and through which imaging light passes, and an image-side surface facing the image side A2 and through which imaging light passes. Furthermore, each lens in the optical imaging lens 1 of the present invention also has an optical axis region and a circumferential region. For example, the first lens 10 has an object-side surface 11 and an image-side surface 12; the second lens 20 has an object-side surface 21 and an image-side surface 22; the third lens 30 has an object-side surface 31 and an image-side surface 32; the fourth lens 40 has an object-side surface 41 and an image-side surface 42; the fifth lens 50 has an object-side surface 51 and an image-side surface 52; the sixth lens 60 has an object-side surface 61 and an image-side surface 62; the seventh lens 70 has an object-side surface 71 and an image-side surface 72; the eighth lens 80 has an object-side surface 81 and an image-side surface 82; and the ninth lens 90 has an object-side surface 91 and an image-side surface 92. Each object-side surface and image-side surface also has an optical axis region and a circumferential region. Each lens in the optical imaging lens 1 of the present invention also has a thickness T located on the optical axis I. For example, the first lens 10 has a first lens thickness T1, the second lens 20 has a second lens thickness T2, the third lens 30 has a third lens thickness T3, the fourth lens 40 has a fourth lens thickness T4, the fifth lens 50 has a fifth lens thickness T5, the sixth lens 60 has a sixth lens thickness T6, the seventh lens 70 has a seventh lens thickness T7, the eighth lens 80 has an eighth lens thickness T8, and the ninth lens 90 has a ninth lens thickness T9. Therefore, the sum of the nine thicknesses on the optical axis I from the first lens 10 to the ninth lens 90 in the optical imaging lens 1 of the present invention is called ALT. That is, ALT = T1 + T2 + T3 + T4 + T5 + T6 + T7 + T8 + T9. In the optical imaging lens 1 of this invention, there are air gaps located on the optical axis I between each lens. For example, the air gap on the optical axis I between the first lens 10 and the second lens 20 is called G12, the air gap between the second lens 20 and the third lens 30 is called G23, the air gap between the third lens 30 and the fourth lens 40 is called G34, the air gap between the fourth lens 40 and the fifth lens 50 is called G45, the air gap between the fifth lens 50 and the sixth lens 60 is called G56, the air gap between the sixth lens 60 and the seventh lens 70 is called G67, the air gap between the seventh lens 70 and the eighth lens 80 is called G78, and the air gap between the eighth lens 80 and the ninth lens 90 is called G89. Therefore, the sum of the nine air gaps on the optical axis I from the first lens 10 to the ninth lens 90 is called AAG. That is, AAG = G12+G23+G34+G45+G56+G67+G78+G89. Additionally, D11t22 is the distance on optical axis I from the object-side surface 11 of the first lens 10 to the image-side surface 22 of the second lens 20; D41t52 is the distance on optical axis I from the object-side surface 41 of the fourth lens 40 to the image-side surface 52 of the fifth lens 50; D22t41 is the distance on optical axis I from the image-side surface 22 of the second lens 20 to the object-side surface 41 of the fourth lens 40; D11t51 is the distance on optical axis I from the object-side surface 11 of the first lens 10 to the object-side surface 51 of the fifth lens 50; and D62t82 is the distance on optical axis I from the image-side surface 62 of the sixth lens 60 to the image-side surface 62 of the fifth lens 60. The distance on optical axis I is the distance between the image side surface 82 of the eighth lens 80, the distance on optical axis I is the distance between the object side surface 51 of the fifth lens 50 and the image side surface 62 of the sixth lens 60, the distance on optical axis I is the distance between the object side surface 61 of the sixth lens 60 and the image side surface 82 of the eighth lens 80, the distance on optical axis I is the distance between the image side surface 62 of the sixth lens 60 and the image side surface 92 of the ninth lens 90, and the distance on optical axis I is the distance between the object side surface 11 of the first lens 10 and the image side surface 32 of the third lens 30. Furthermore, the distance on the optical axis I from the object-side surface 11 of the first lens 10 to the image-side surface 4 is the system length TTL of the optical imaging lens 1. The effective focal length of the optical imaging lens 1 is EFL. The distance on the optical axis I from the object-side surface 11 of the first lens 10 to the image-side surface 92 of the ninth lens 90 is TL. HFOV is the half-angle of the optical imaging lens 1, that is, half of the maximum field of view. ImgH is the image height of the optical imaging lens 1. Fno is the aperture value of the optical imaging lens 1. EPD is the entrance pupil diameter of the optical imaging lens 1, which is equal to the effective focal length EFL of the optical imaging lens 1 divided by the aperture value Fno, that is, EPD = EFL / Fno. When filter 3 is positioned between the ninth lens 90 and the imaging surface 4, G9F represents the air gap between the ninth lens 90 and filter 3 on the optical axis I, TF represents the thickness of filter 3 on the optical axis I, GFP represents the air gap between filter 3 and imaging surface 4 on the optical axis I, and BFL is the back focal length of the optical imaging lens 1, which is the distance from the image side 92 of the ninth lens 90 to the imaging surface 4 on the optical axis I, i.e., BFL = G9F + TF + GFP. Furthermore, let's define: f1 as the focal length of the first lens 10; f2 as the focal length of the second lens 20; f3 as the focal length of the third lens 30; f4 as the focal length of the fourth lens 40; f5 as the focal length of the fifth lens 50; f6 as the focal length of the sixth lens 60; f7 as the focal length of the seventh lens 70; f8 as the focal length of the eighth lens 80; f9 as the focal length of the ninth lens 90; n1 as the refractive index of the first lens 10; n2 as the refractive index of the second lens 20; n3 as the refractive index of the third lens 30; n4 as the refractive index of the fourth lens 40; n5 as the refractive index ... n6 is the refractive index of the sixth lens (60); n7 is the refractive index of the seventh lens (70); n8 is the refractive index of the eighth lens (80); n9 is the refractive index of the ninth lens (90); υ1 is the Abbe number of the first lens (10); υ2 is the Abbe number of the second lens (20); υ3 is the Abbe number of the third lens (30); υ4 is the Abbe number of the fourth lens (40); υ5 is the Abbe number of the fifth lens (50); υ6 is the Abbe number of the sixth lens (60); υ7 is the Abbe number of the seventh lens (70); υ8 is the Abbe number of the eighth lens (80); υ9 is the Abbe number of the ninth lens (90). First Embodiment Please refer to Figure 6, which illustrates a first embodiment of the optical imaging lens 1 of the present invention. For the first embodiment, the longitudinal spherical aberration on the imaging plane 4 is shown in Figure 7A, the sagittal field curvature aberration in Figure 7B, the tangential field curvature aberration in Figure 7C, and the distortion aberration in Figure 7D. In all embodiments, the Y-axis of each spherical aberration diagram represents the field of view, with its highest point being 1.0. The Y-axis of each aberration diagram and distortion aberration diagram in the embodiments represents the image height. The image height (ImgH) of the first embodiment is 5.421 mm. The optical imaging lens 1 of the first embodiment mainly consists of nine lenses with refractive indices, an aperture 2, and an imaging plane 4. The aperture 2 of the first embodiment is located in front of the image side A2 of the first lens 10. The first lens 10 has a positive refractive index. The optical axis region 13 of the object-side surface 11 of the first lens 10 is convex, and its circumferential region 14 is also convex. The optical axis region 16 of the image-side surface 12 of the first lens 10 is concave, and its circumferential region 17 is also concave. Both the object-side surface 11 and the image-side surface 12 of the first lens 10 are aspherical, but this is not a limitation. The second lens 20 has a negative refractive index. The optical axis region 23 and its circumferential region 24 of the object-side surface 21 of the second lens 20 are convex, and the optical axis region 26 and its circumferential region 27 of the image-side surface 22 of the second lens 20 are concave. Both the object-side surface 21 and the image-side surface 22 of the second lens 20 are aspherical, but this is not a limitation. The third lens 30 has a positive refractive index. The optical axis region 33 of the object-side surface 31 of the third lens 30 is convex, and its circumferential region 34 is also convex. The optical axis region 36 of the image-side surface 32 of the third lens 30 is concave, and its circumferential region 37 is also concave. Both the object-side surface 31 and the image-side surface 32 of the third lens 30 are aspherical, but this is not a limitation. The fourth lens 40 has a positive refractive index. The optical axis region 43 of the object-side surface 41 of the fourth lens 40 is concave, and its circumferential region 44 is also concave. The optical axis region 46 of the image-side surface 42 of the fourth lens 40 is convex, and its circumferential region 47 is also convex. Both the object-side surface 41 and the image-side surface 42 of the fourth lens 40 are aspherical, but this is not a limitation. The fifth lens 50 has a positive refractive index. The optical axis region 53 of the object-side surface 51 of the fifth lens 50 is convex, and its circumferential region 54 is concave. The optical axis region 56 of the image-side surface 52 of the fifth lens 50 is concave, and its circumferential region 57 is concave. Both the object-side surface 51 and the image-side surface 52 of the fifth lens 50 are aspherical, but this is not a limitation. The sixth lens 60 has a negative refractive index. The optical axis region 63 of the object-side surface 61 of the sixth lens 60 is concave and its circumferential region 64 is convex. The optical axis region 66 of the image-side surface 62 of the sixth lens 60 is convex and its circumferential region 67 is convex. Both the object-side surface 61 and the image-side surface 62 of the sixth lens 60 are aspherical, but this is not a limitation. The seventh lens 70 has a negative refractive index. The optical axis region 73 of the object-side surface 71 of the seventh lens 70 is convex and its circumferential region 74 is concave. The optical axis region 76 of the image-side surface 72 of the seventh lens 70 is concave and its circumferential region 77 is convex. Both the object-side surface 71 and the image-side surface 72 of the seventh lens 70 are aspherical, but this is not a limitation. The eighth lens 80 has a positive refractive index. The optical axis region 83 of the object-side surface 81 of the eighth lens 80 is convex and its circumferential region 84 is concave. The optical axis region 86 of the image-side surface 82 of the eighth lens 80 is concave and its circumferential region 87 is convex. Both the object-side surface 81 and the image-side surface 82 of the eighth lens 80 are aspherical, but this is not a limitation. The ninth lens 90 has a positive refractive index. The optical axis region 93 of the object-side surface 91 of the ninth lens 90 is convex, and its circumferential region 94 is concave. The optical axis region 96 of the image-side surface 92 of the ninth lens 90 is concave, and its circumferential region 97 is convex. Both the object-side surface 91 and the image-side surface 92 of the ninth lens 90 are aspherical, but this is not a limitation. In the optical imaging lens 1 of the present invention, all eighteen curved surfaces from the first lens 10 to the ninth lens 90, including the object-side surfaces 11 / 21 / 31 / 41 / 51 / 61 / 71 / 81 / 91 and the image-side surfaces 12 / 22 / 32 / 42 / 52 / 62 / 72 / 82 / 92, can be aspherical surfaces, but are not limited thereto. If they are aspherical surfaces, these aspherical surfaces are defined by the following formula: in: Y represents the perpendicular distance between a point on the aspherical surface and the optical axis I; Z represents the depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface that is Y away from the optical axis I and the tangent plane that is tangent to the vertex on the optical axis I of the aspherical surface). R represents the radius of curvature of the lens surface near the optical axis I; K is the conic constant. a i Let a be the i-th order aspherical coefficient, where a in each embodiment The coefficients are both 0. The optical data of the optical imaging lens system in the first embodiment is shown in Figure 24, and the aspherical data is shown in Figure 25. In the optical imaging lens system of the following embodiments, the aperture value (f-number) of the overall optical imaging lens is Fno, the effective focal length (EFL) is , and the half field of view (HFOV) is half of the maximum field of view of the overall optical imaging lens. The image height (ImgH), radius of curvature, thickness, and focal length of the optical imaging lens are all in millimeters (mm). In this embodiment, EFL = 5.413 mm; HFOV = 40.500 degrees; TTL = 7.741 mm; Fno = 1.800; ImgH = 5.421 mm. Second Embodiment Please refer to Figure 8, which illustrates a second embodiment of the optical imaging lens 1 of the present invention. Note that, starting with the second embodiment, for simplification and clarity of the diagrams, only the optical axis regions and circumferential regions of each lens with different surface shapes compared to the first embodiment are specifically marked on the figures. The optical axis regions and circumferential regions with the same surface shapes as the lenses in the first embodiment, such as concave or convex surfaces, are not separately marked. For the longitudinal spherical aberration on the imaging plane 4 in the second embodiment, please refer to Figure 9A; for the sagittal field curvature aberration, please refer to Figure 9B; for the meridional field curvature aberration, please refer to Figure 9C; and for the distortion aberration, please refer to Figure 9D. The design of the second embodiment is similar to that of the first embodiment, except that related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is convex, the circumferential region 64 of the object-side surface 61 of the sixth lens 60 is concave, the seventh lens 70 has a positive refractive index, and the ninth lens 90 has a negative refractive index. Detailed optical data for the second embodiment are shown in Figure 26, and aspherical data are shown in Figure 27. In this embodiment, EFL = 5.469 mm; HFOV = 40.500 degrees; TTL = 8.149 mm; Fno = 1.800; ImgH = 5.443 mm. In particular: 1. The image height ImgH of this embodiment is larger than that of the first embodiment; 2. The distortion aberration of this embodiment is better than that of the first embodiment. Third Embodiment Please refer to Figure 10, which illustrates a third embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the third embodiment, please refer to Figure 11A; for the sagittal field curvature aberration, please refer to Figure 11B; for the meridional field curvature aberration, please refer to Figure 11C; and for the distortion aberration, please refer to Figure 11D. The design of the third embodiment is similar to that of the first embodiment, except that related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, and back focal length are different. Furthermore, in this embodiment, the second lens 20 has a positive refractive index, the third lens 30 has a negative refractive index, the circumferential region 34 of the object side 31 of the third lens 30 is concave, the circumferential region 37 of the image side 32 of the third lens 30 is convex, the fifth lens 50 has a negative refractive index, the optical axis region 53 of the object side 51 of the fifth lens 50 is concave, the optical axis region 56 of the image side 52 of the fifth lens 50 is convex, the circumferential region 57 of the image side 52 of the fifth lens 50 is convex, the circumferential region 64 of the object side 61 of the sixth lens 60 is concave, the seventh lens 70 has a positive refractive index, and the ninth lens 90 has a negative refractive index. Detailed optical data for the third embodiment are shown in Figure 28, and aspherical data are shown in Figure 29. In this embodiment, EFL = 5.860 mm; HFOV = 41.500 degrees; TTL = 8.256 mm; Fno = 1.800; ImgH = 5.987 mm. Specifically: 1. The half-angle of view in this embodiment is greater than that in the first embodiment; 2. The image height ImgH in this embodiment is greater than that in the first embodiment; 3. The distortion aberration in this embodiment is better than that in the first embodiment. Fourth embodiment Please refer to Figure 12, which illustrates a fourth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the fourth embodiment, please refer to Figure 13A; for the sagittal field curvature aberration, please refer to Figure 13B; for the meridional field curvature aberration, please refer to Figure 13C; and for the distortion aberration, please refer to Figure 13D. The design of the fourth embodiment is similar to that of the first embodiment, except that related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the fourth lens 40 has a negative refractive index; the optical axis region 53 of the object-side surface 51 of the fifth lens 50 is concave; the optical axis region 56 of the image-side surface 52 of the fifth lens 50 is convex; the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is convex; the circumferential region 64 of the object-side surface 61 of the sixth lens 60 is concave; the seventh lens 70 has a positive refractive index; the optical axis region 86 of the image-side surface 82 of the eighth lens 80 is convex; and the ninth lens 90 has a negative refractive index. Detailed optical data for the fourth embodiment is shown in Figure 30, and aspherical data is shown in Figure 31. In this embodiment, EFL = 7.397 mm; HFOV = 37.523 degrees; TTL = 9.428 mm; Fno = 1.932; ImgH = 6.700 mm. Specifically: 1. The image height ImgH of this embodiment is larger than that of the first embodiment; 2. The thickness difference between the optical axis region and the circumferential region of the lens in this embodiment is smaller than that in the first embodiment, making it easier to manufacture and thus resulting in a higher yield. Fifth embodiment Please refer to Figure 14, which illustrates a fifth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the fifth embodiment, please refer to Figure 15A; for the sagittal field curvature aberration, please refer to Figure 15B; for the meridional field curvature aberration, please refer to Figure 15C; and for the distortion aberration, please refer to Figure 15D. The design of the fifth embodiment is similar to that of the first embodiment, except that related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the fifth lens 50 has a negative refractive index; the optical axis region 53 of the object-side surface 51 of the fifth lens 50 is concave; the optical axis region 56 of the image-side surface 52 of the fifth lens 50 is convex; the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is convex; the sixth lens 60 has a positive refractive index; the circumferential region 64 of the object-side surface 61 of the sixth lens 60 is concave; the seventh lens 70 has a positive refractive index; and the ninth lens 90 has a negative refractive index. Detailed optical data for the fifth embodiment is shown in Figure 32, and aspherical data is shown in Figure 33. In this embodiment, EFL = 6.254 mm; HFOV = 42.333 degrees; TTL = 8.623 mm; Fno = 1.800; ImgH = 6.000 mm. Specifically: 1. The half-angle of view in this embodiment is greater than that in the first embodiment; 2. The image height ImgH in this embodiment is greater than that in the first embodiment; 3. The distortion aberration in this embodiment is better than that in the first embodiment. Sixth Embodiment Please refer to Figure 16, which illustrates a sixth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the sixth embodiment, please refer to Figure 17A; for the sagittal field curvature aberration, please refer to Figure 17B; for the meridional field curvature aberration, please refer to Figure 17C; and for the distortion aberration, please refer to Figure 17D. The design of the sixth embodiment is similar to that of the first embodiment, except that related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the fifth lens 50 has a negative refractive index; the optical axis region 53 of the object-side surface 51 of the fifth lens 50 is concave; the optical axis region 56 of the image-side surface 52 of the fifth lens 50 is convex; the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is convex; the circumferential region 64 of the object-side surface 61 of the sixth lens 60 is concave; the seventh lens 70 has a positive refractive index; the eighth lens 80 has a negative refractive index; and the ninth lens 90 has a negative refractive index. Detailed optical data for the sixth embodiment is shown in Figure 34, and aspherical data is shown in Figure 35. In this embodiment, EFL = 6.256 mm; HFOV = 43.327 degrees; TTL = 8.562 mm; Fno = 1.900; ImgH = 6.094 mm. Specifically: 1. The half-angle of view in this embodiment is greater than that in the first embodiment; 2. The image height ImgH in this embodiment is greater than that in the first embodiment; 3. The longitudinal spherical aberration in this embodiment is better than that in the first embodiment; 4. The distortion aberration in this embodiment is better than that in the first embodiment. Seventh Embodiment Please refer to Figure 18, which illustrates a seventh embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the seventh embodiment, please refer to Figure 19A; for the sagittal field curvature aberration, please refer to Figure 19B; for the meridional field curvature aberration, please refer to Figure 19C; and for the distortion aberration, please refer to Figure 19D. The design of the seventh embodiment is similar to that of the first embodiment, except that related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the circumferential region 37 of the image-side surface 32 of the third lens 30 is convex; the fifth lens 50 has a negative refractive index; the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is convex; the circumferential region 64 of the object-side surface 61 of the sixth lens 60 is concave; and the ninth lens 90 has a negative refractive index. Detailed optical data for the seventh embodiment is shown in Figure 36, and aspherical data is shown in Figure 37. In this embodiment, EFL = 5.392 mm; HFOV = 40.500 degrees; TTL = 7.704 mm; Fno = 1.800; ImgH = 5.417 mm. Specifically: 1. The system length TTL of this embodiment is shorter than that of the first embodiment; 2. The field curvature aberration in the meridional direction of this embodiment is superior to that of the first embodiment. Eighth embodiment Please refer to Figure 20, which illustrates an eighth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the eighth embodiment, please refer to Figure 21A; for the sagittal field curvature aberration, please refer to Figure 21B; for the meridional field curvature aberration, please refer to Figure 21C; and for the distortion aberration, please refer to Figure 21D. The design of the eighth embodiment is similar to that of the first embodiment, except that related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is convex, the circumferential region 64 of the object-side surface 61 of the sixth lens 60 is concave, and the seventh lens 70 has a positive refractive index. Detailed optical data for the eighth embodiment are shown in Figure 38, and aspherical data are shown in Figure 39. In this embodiment, EFL = 5.460 mm; HFOV = 40.500 degrees; TTL = 8.133 mm; Fno = 1.800; ImgH = 5.465 mm. Specifically: 1. The image height ImgH of this embodiment is greater than that of the first embodiment; 2. The distortion aberration of this embodiment is superior to that of the first embodiment. Ninth Embodiment Please refer to Figure 22, which illustrates a ninth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the ninth embodiment, please refer to Figure 23A; for the sagittal field curvature aberration, please refer to Figure 23B; for the meridional field curvature aberration, please refer to Figure 23C; and for the distortion aberration, please refer to Figure 23D. The design of the ninth embodiment is similar to that of the first embodiment, except that related parameters such as lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the fifth lens 50 has a negative refractive index; the optical axis region 53 of the object-side surface 51 of the fifth lens 50 is concave; the optical axis region 56 of the image-side surface 52 of the fifth lens 50 is convex; the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is convex; the circumferential region 64 of the object-side surface 61 of the sixth lens 60 is concave; the seventh lens 70 has a positive refractive index; and the ninth lens 90 has a negative refractive index. Detailed optical data for the ninth embodiment are shown in Figure 40, and aspherical data are shown in Figure 41. In this embodiment, EFL = 6.590 mm; HFOV = 42.195 degrees; TTL = 8.747 mm; Fno = 1.800; ImgH = 6.700 mm. Specifically: 1. The half-angle of view in this embodiment is greater than that in the first embodiment; 2. The image height ImgH in this embodiment is greater than that in the first embodiment; 3. The longitudinal spherical aberration in this embodiment is better than that in the first embodiment; 4. The distortion aberration in this embodiment is better than that in the first embodiment. In addition, the important parameters of each embodiment are summarized in Figures 42 and 43. The various embodiments of the present invention are advantageous in providing an optical imaging lens 1 with a smaller aperture value, a larger image height, and improved resolution, while maintaining system length, good image quality, and technical feasibility. 1. The optical imaging lens 1 of the present invention satisfies the following conditions: the circumferential region 44 of the object-side surface 41 of the fourth lens 40 is concave, the optical axis region 63 of the object-side surface 61 of the sixth lens 60 is concave, the optical axis region 73 of the object-side surface 71 of the seventh lens 70 is convex, and the optical axis region 93 of the object-side surface 91 of the ninth lens 90 is convex. Furthermore, (G23+G34) / |G23-G34|≧3.000 is favorable for designing lenses with large apertures and large image heights. A preferred range is 3.000≦(G23+G34) / |G23-G34|≦21.000. The optical imaging lens 1 can further define the first lens 10 to have a positive refractive index, which is beneficial for reducing the system length by matching the above surface shapes. 2. The optical imaging lens 1 of the present invention satisfies the following conditions: the optical axis region 43 of the object-side surface 41 of the fourth lens 40 is concave, the optical axis region 63 of the object-side surface 61 of the sixth lens 60 is concave, and the optical axis region 93 of the object-side surface 91 of the ninth lens 90 is convex, and (G23+G34) / |G23-G34|≧4.400. This is beneficial for designing lenses with large apertures and large image heights. Specifically, (G23+G34) / |G23-G34|≧4.400 is beneficial for correcting aberrations in the inner field of view (0.2~0.4 field of view), with a preferred range of 4.400≦(G23+G34) / |G23-G34|≦21.000. The optical imaging lens 1 can further define the first lens 10 to have a positive refractive index, which is beneficial for reducing the system length by matching the above surface shape. 3. The optical imaging lens 1 of the present invention satisfies the following conditions: the optical axis region 43 of the object-side surface 41 of the fourth lens 40 is concave, the optical axis region 63 of the object-side surface 61 of the sixth lens 60 is concave, the optical axis region 76 of the image-side surface 72 of the seventh lens 70 is concave, and (G23+G34) / |G23-G34|≧4.400 is beneficial for designing lenses with large apertures and large image heights. Specifically, (G23+G34) / |G23-G34|≧4.400 is beneficial for correcting aberrations in the inner field of view (0.2~0.4 field of view), with a preferred range of 4.400≦(G23+G34) / |G23-G34|≦21.000. The optical imaging lens 1 can further define the first lens 10 to have a positive refractive index, which is beneficial for reducing the system length by matching the above surface shape. 4. When the optical imaging lens 1 of the present invention satisfies υ3+υ9≦100.000, υ4+υ9≦100.000, υ6+υ7+υ8+υ9≦175.000 or (υ4+υ5+υ8) / υ9≦5.800, it is beneficial to improve the modulation transfer function (MTF) of the optical imaging lens and increase the resolution. The preferred range is 38.000≦υ3+υ9≦100.000, 38.000≦υ4 +υ9≦100.000, 110.000≦υ6+υ7+υ8+υ9≦175.000 or 1.000≦(υ4+υ5+υ8) / υ9≦5.800, with the optimal range being 75.000≦υ4+υ9≦100.000, 148.000≦υ6+υ7+υ8+υ9≦175.000 or 2.400≦(υ4+υ5+υ8) / υ9≦5.800. 5. The optical imaging lens of the present invention further satisfies the following condition, which helps to maintain an appropriate value for the thickness and spacing of each lens while providing a large aperture and large image height lens, avoiding any parameter being too large, which would be detrimental to the overall thinness of the optical imaging lens, or avoiding any parameter being too small, which would affect assembly or increase manufacturing difficulty: 1) (D11t22+D41t52) / D22t41≦2.000, the preferred range is 1.200≦(D11t22+D41t52) / D22t41≦2.000; 2) 1.900≦(G56+T6) / (G45+T5), the preferred range is 1.900≦(G56+T6) / (G45+T5)≦3.800; 3) Fno*(D11t51+D62t82) / D51t62≦6.300, the preferred range is 4.100≦Fno*(D11t51+D62t82) / D51t62≦6.300; 4) 6.100≦(EPD+TTL) / D62t82, the preferred range is 6.100≦(EPD+TTL) / D62t82≦8.700; 5) (D11t22+D62t82) / (G23+T3)≦4.100, the preferred range is 2.100≦(D11t22+D62t82) / (G23+T3)≦4.100; 6) (D11t22+D41t52+D61t82) / D22t41≦4.000, the preferred range is 2.600≦(D11t22+D41t52+D61t82) / D22t41≦4.000; 7) D11t22 / G23≦2.700, with a preferred range of 1.300≦D11t22 / G23≦2.700; 8) 7.000≦(ImgH+TL) / D62t82, with a preferred range of 7.000≦(ImgH+TL) / D62t82≦10.000; 9) 10.000≦(EFL+ImgH) / D11t22, with a preferred range of 10.000≦(EFL+ImgH) / D11t22≦13.000; 10) (D11t22+D62t82) / (G34+T4)≦3.400, the preferred range is 2.500≦(D11t22+D62t82) / (G34+T4)≦3.400; 11) D62t92 / (G56+T6)≦5.100, with a preferred range of 2.000≦D62t92 / (G56+T6)≦5.100; 12) (D11t32+G45+T5) / (G34+T4)≦2.800, the preferred range is 2.000≦(D11t32+G45+T5) / (G34+T4)≦2.800; 13) Fno*(ALT+BFL) / AAG≦3.700, with a preferred range of 2.600≦Fno*(ALT+BFL) / AAG≦3.700; 14) (D62t82+G89+T9) / D51t62≦2.400, the preferred range is 1.400≦(D62t82+G89+T9) / D51t62≦2.400. In addition, any combination of parameters in the embodiments can be selected to increase lens constraints, thereby facilitating lens design with the same architecture as the present invention. 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 system of the present invention, increase the usable aperture, improve the image quality, or improve the assembly yield, thereby improving the shortcomings of the prior art. The exemplary limiting relationships listed above can be selectively combined and applied in varying numbers to embodiments of the present invention, and are not limited thereto. In implementing the present invention, in addition to the aforementioned relationships, further detailed structures such as the arrangement of concave and convex surfaces of individual lenses or, more broadly, multiple lenses can be designed to enhance control over system performance and / or resolution. It should be noted that these details should be selectively combined and applied to other embodiments of the present invention, provided there is no conflict. The embodiments of this invention disclose optical parameters such as focal length, lens thickness, and Abbe number, but are not limited to these parameters. For example, the present invention discloses an optical parameter A and an optical parameter B in various embodiments. The specific explanations of the ranges covered by these optical parameters, the comparative relationships between the optical parameters, and the conditional ranges covered by the various embodiments are as follows: (1) The range covered by optical parameters, for example: α 2≦A≦α 1 or β 2≦B≦β 1, α 1 represents the maximum value of optical parameter A in multiple embodiments, α 2 represents the minimum value of optical parameter A in multiple embodiments, β 1 represents the maximum value of optical parameter B in multiple embodiments, β 2 represents the minimum value of optical parameter B in multiple embodiments. (2) Comparison of optical parameters, for example: A is greater than B or A is less than B. (3) The conditional range covered by multiple embodiments, specifically, the combination or proportional relationships obtained by possible calculations of a plurality of optical parameters of the same embodiment, defined as E. E may be, for example: A+B or AB or A / B or A*B or (A*B). 1 / 2 And E satisfies the condition E≦γ 1 or E≧γ 2 or γ 2≦E≦γ 1,γ 1 and γ 2 represents the value obtained by calculating optical parameter A and optical parameter B in the same embodiment, and γ 1 represents the maximum value in various embodiments of the present invention, γ 2 is the minimum value in several embodiments of the present invention. The range covered by the aforementioned optical parameters, the comparative relationships between the optical parameters, and the maximum, minimum, and numerical ranges within these conditions are all features upon which the present invention can be implemented, and all fall within the scope disclosed in the present invention. The above are merely illustrative examples and should not be construed as limiting. All embodiments of the present invention are implementable, and some feature combinations can be extracted from the same embodiment. These feature combinations can achieve unexpected effects compared to prior art. These feature combinations include, but are not limited to, combinations of features such as surface shape, refractive index, and conditional features. The disclosure of the embodiments of the present invention is a specific example illustrating the principles of the invention and should not be construed as limiting the invention to the disclosed embodiments. Furthermore, the embodiments and accompanying drawings are merely illustrative of the invention and are not intended to limit it. The above descriptions are merely preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be considered within the scope of the present invention. 1: Optical imaging lens; 2: Aperture; 3: Filter; 4: Imaging plane; 11, 21, 31, 41, 51, 61, 71, 110, 410, 510: Object side; 12, 22, 32, 42, 52, 62, 72, 120, 320: Image side; 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, 73, 76, 83, 86, 93, 96, Z1: Optical axis regions 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, 74, 77, 84, 87, 94, 97, Z2: Circumferential region 10: First lens 20: Second lens 30: Third lens 40: Fourth lens 50: Fifth lens 60: Sixth lens 70: Seventh lens 80: Eighth lens 90: Ninth lens 100, 200, 300, 400, 500: Lens 130: Assembly section 211, 212: Parallel ray A1: Object side A2: Image side CP: Center point CP1: First center point CP2: Second center point TP1: First conversion point TP2: Second conversion point OB: Optical boundary I: Optical axis Lc: Principal ray Lm: Marginal ray EL: Extension line Z3: Relay region M: Intersection point R: Intersection point Figures 1 to 5 illustrate schematic diagrams of the method for determining the curvature shape of the optical imaging lens of the present invention. Figure 6 illustrates a schematic diagram of a first embodiment of the optical imaging lens of the present invention. Figure 7A illustrates the longitudinal spherical aberration on the imaging plane of the first embodiment. Figure 7B illustrates the field curvature aberration in the sagittal direction of the first embodiment. Figure 7C illustrates the field curvature aberration in the meridional direction of the first embodiment. Figure 7D illustrates the distortion aberration of the first embodiment. Figure 8 illustrates a schematic diagram of a second embodiment of the optical imaging lens of the present invention. Figure 9A illustrates the longitudinal spherical aberration on the imaging plane of the second embodiment. Figure 9B illustrates the field curvature aberration in the sagittal direction of the second embodiment. Figure 9C illustrates the field curvature aberration in the meridional direction of the second embodiment. Figure 9D illustrates the distortion aberration of the second embodiment. Figure 10 illustrates a schematic diagram of a third embodiment of the optical imaging lens of the present invention. Figure 11A illustrates the longitudinal spherical aberration on the imaging plane of the third embodiment. Figure 11B illustrates the field curvature aberration in the sagittal direction of the third embodiment. Figure 11C illustrates the field curvature aberration in the meridional direction of the third embodiment. Figure 11D illustrates the distortion aberration of the third embodiment. Figure 12 illustrates a schematic diagram of the fourth embodiment of the optical imaging lens of the present invention. Figure 13A illustrates the longitudinal spherical aberration on the imaging plane of the fourth embodiment. Figure 13B illustrates the field curvature aberration in the sagittal direction of the fourth embodiment. Figure 13C illustrates the field curvature aberration in the meridional direction of the fourth embodiment. Figure 13D illustrates the distortion aberration of the fourth embodiment. Figure 14 illustrates a schematic diagram of the fifth embodiment of the optical imaging lens of the present invention. Figure 15A illustrates the longitudinal spherical aberration on the imaging plane of the fifth embodiment. Figure 15B illustrates the field curvature aberration in the sagittal direction of the fifth embodiment. Figure 15C illustrates the field curvature aberration in the meridional direction of the fifth embodiment. Figure 15D illustrates the distortion aberration of the fifth embodiment. Figure 16 illustrates a schematic diagram of the sixth embodiment of the optical imaging lens of the present invention. Figure 17A illustrates the longitudinal spherical aberration on the imaging plane of the sixth embodiment. Figure 17B illustrates the field curvature aberration in the sagittal direction of the sixth embodiment. Figure 17C illustrates the field curvature aberration in the meridional direction of the sixth embodiment. Figure 17D illustrates the distortion aberration of the sixth embodiment. Figure 18 illustrates a schematic diagram of the seventh embodiment of the optical imaging lens of the present invention. Figure 19A illustrates the longitudinal spherical aberration on the imaging plane of the seventh embodiment. Figure 19B illustrates the field curvature aberration in the sagittal direction of the seventh embodiment. Figure 19C illustrates the field curvature aberration in the meridional direction of the seventh embodiment. Figure 19D illustrates the distortion aberration of the seventh embodiment. Figure 20 illustrates a schematic diagram of the eighth embodiment of the optical imaging lens of the present invention. Figure 21A illustrates the longitudinal spherical aberration on the imaging plane of the eighth embodiment. Figure 21B illustrates the field curvature aberration in the sagittal direction of the eighth embodiment. Figure 21C illustrates the field curvature aberration in the meridional direction of the eighth embodiment. Figure 21D illustrates the distortion aberration of the eighth embodiment. Figure 22 illustrates a schematic diagram of the ninth embodiment of the optical imaging lens of the present invention. Figure 23A illustrates the longitudinal spherical aberration on the imaging plane of the ninth embodiment. Figure 23B illustrates the field curvature aberration in the sagittal direction of the ninth embodiment. Figure 23C illustrates the field curvature aberration in the meridional direction of the ninth embodiment. Figure 23D illustrates the distortion aberrations of the ninth embodiment.Figure 24 shows detailed optical data for the first embodiment. Figure 25 shows detailed aspherical data for the first embodiment. Figure 26 shows detailed optical data for the second embodiment. Figure 27 shows detailed aspherical data for the second embodiment. Figure 28 shows detailed optical data for the third embodiment. Figure 29 shows detailed aspherical data for the third embodiment. Figure 30 shows detailed optical data for the fourth embodiment. Figure 31 shows detailed aspherical data for the fourth embodiment. Figure 32 shows detailed optical data for the fifth embodiment. Figure 33 shows detailed aspherical data for the fifth embodiment. Figure 34 shows detailed optical data for the sixth embodiment. Figure 35 shows detailed aspherical data for the sixth embodiment. Figure 36 shows detailed optical data for the seventh embodiment. Figure 37 shows detailed aspherical data for the seventh embodiment. Figure 38 shows detailed optical data for the eighth embodiment. Figure 39 shows detailed aspherical data for the eighth embodiment. Figure 40 shows detailed optical data for the ninth embodiment. Figure 41 shows detailed aspherical data for the ninth embodiment. Figure 42 shows important parameters for each embodiment. Figure 43 shows important parameters for each embodiment. 1: Optical imaging lens 2: Aperture 3: Filter 4: Imaging plane 11, 21, 31, 41, 51, 61, 71, 81, 91: Side view of the object 12, 22, 32, 42, 52, 62, 72, 82, 92: side view 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, 73, 76, 83, 86, 93, 96: Optical axis region 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, 74, 77, 84, 87, 94, 97: Circular area 10: First lens 20: Second lens 30: Third Lens 40: Fourth Lens 50: Fifth Lens 60: Sixth Lens 70: The Seventh Lens 80: Eighth Lens 90: Ninth Lens A1: Object side A2: Image side I: optical axis

Claims

1. An optical imaging lens, comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, wherein each of the first to ninth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which the imaging light passes; a circumferential region of the image-side surface of the first lens is concave; and a circumferential region of the object-side surface of the ninth lens is concave; wherein, The optical imaging lens has only the aforementioned nine lenses. υ3 is defined as the Abbe number of the third lens, υ9 as the Abbe number of the ninth lens, Fno as the aperture value of the optical imaging lens, D11t51 as the distance on the optical axis from the object-side surface of the first lens to the object-side surface of the fifth lens, D62t82 as the distance on the optical axis from the image-side surface of the sixth lens to the image-side surface of the eighth lens, and D51t62 as the distance on the optical axis from the object-side surface of the fifth lens to the image-side surface of the sixth lens. The distance between the fourth and fifth lenses on the optical axis is less than the air gap between the eighth and ninth lenses on the optical axis. The Abbe number of the first lens is greater than the Abbe number of the eighth lens. The Abbe number of the first lens is greater than the Abbe number of the ninth lens. The thickness of the first lens on the optical axis is greater than the air gap between the sixth and seventh lenses on the optical axis.

2. An optical imaging lens, comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, wherein each of the first to ninth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which the imaging light passes; a circumferential region of the image-side surface of the first lens is concave; and a circumferential region of the object-side surface of the ninth lens is concave; wherein, The optical imaging lens has only the aforementioned nine lenses. υ3 is defined as the Abbe number of the third lens, υ9 as the Abbe number of the ninth lens, Fno as the aperture value of the optical imaging lens, D11t51 as the distance on the optical axis from the object-side surface of the first lens to the object-side surface of the fifth lens, D62t82 as the distance on the optical axis from the image-side surface of the sixth lens to the image-side surface of the eighth lens, and D51t62 as the distance on the optical axis from the object-side surface of the fifth lens to the image-side surface of the sixth lens, satisfying Fno*(D11t5) 1+D62t82) / D51t62≦6.300,υ3+υ9≦100.000,The thickness of the seventh lens on the optical axis is greater than the air gap between the second and third lenses on the optical axis, the air gap between the fourth and fifth lenses on the optical axis is less than the air gap between the sixth and seventh lenses on the optical axis, the Abbe number of the first lens is greater than the Abbe number of the eighth lens, the Abbe number of the first lens is greater than the Abbe number of the ninth lens, and the thickness of the first lens on the optical axis is greater than the air gap between the sixth and seventh lenses on the optical axis.

3. An optical imaging lens, comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, wherein each of the first to ninth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which the imaging light passes; a circumferential region of the image-side surface of the first lens is concave; and a circumferential region of the object-side surface of the ninth lens is concave; wherein, The optical imaging lens has only the aforementioned nine lenses. υ4 is defined as the Abbe number of the fourth lens, υ9 as the Abbe number of the ninth lens, Fno as the aperture value of the optical imaging lens, D11t51 as the distance on the optical axis from the object-side surface of the first lens to the object-side surface of the fifth lens, D62t82 as the distance on the optical axis from the image-side surface of the sixth lens to the image-side surface of the eighth lens, D51t62 as the distance on the optical axis from the object-side surface of the fifth lens to the image-side surface of the sixth lens, ALT as the sum of the nine thicknesses of the first to ninth lenses on the optical axis, and BFL as... The distance from the image side of the ninth lens to an imaging plane on the optical axis is defined as follows: AAG is defined as the sum of the eight air gaps between the first lens and the ninth lens on the optical axis, and satisfies Fno*(D11t51+D62t82) / D51t62≦6.300, Fno*(ALT+BFL) / AAG≦3.700, υ4+υ9≦100.000, the air gap between the fourth lens and the fifth lens on the optical axis is smaller than the air gap between the sixth lens and the seventh lens on the optical axis, the Abbe number of the first lens is greater than the Abbe number of the eighth lens, and the Abbe number of the first lens is greater than the Abbe number of the ninth lens.

4. An optical imaging lens as described in either Request 1 or Request 3, wherein G23 is defined as the air gap between the second lens and the third lens on the optical axis, G34 is defined as the air gap between the third lens and the fourth lens on the optical axis, and the optical imaging lens satisfies the following condition: (G23+G34) / |G23-G34|≧4.

400.

5. An optical imaging lens as described in any one of Request 1, Request 2 and Request 3, wherein T5 is defined as the thickness of the fifth lens on the optical axis, T6 is defined as the thickness of the sixth lens on the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, G56 is defined as the air gap between the fifth lens and the sixth lens on the optical axis, and the optical imaging lens satisfies the following condition: 1.900≦(G56+T6) / (G45+T5).

6. An optical imaging lens as described in any one of Request 1, Request 2 and Request 3, wherein T6 is defined as the thickness of the sixth lens on the optical axis, G56 is defined as the air gap between the fifth lens and the sixth lens on the optical axis, D62t92 is defined as the distance from the image side surface of the sixth lens to the image side surface of the ninth lens on the optical axis, and the optical imaging lens satisfies the following condition: D62t92 / (G56+T6)≦5.

100.

7. An optical imaging lens, comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, wherein each of the first to ninth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which the imaging light passes; a circumferential region of the image-side surface of the first lens is concave; and a circumferential region of the object-side surface of the ninth lens is concave; wherein, The optical imaging lens has only the aforementioned nine lenses. T9 is defined as the thickness of the ninth lens on the optical axis; G89 is defined as the air gap between the eighth and ninth lenses on the optical axis; D62t82 is defined as the distance on the optical axis between the image-side surface of the sixth lens and the image-side surface of the eighth lens; D51t62 is defined as the distance on the optical axis between the object-side surface of the fifth lens and the image-side surface of the sixth lens; Fno is defined as the aperture value of the optical imaging lens; D11t51 is defined as the distance on the optical axis between the object-side surface of the first lens and the object-side surface of the fifth lens, and satisfies Fno*(D11t51+D62t82) / D51t 62≦6.300、(D62t82+G89+T9) / D51t62≦2.400、The air gap between the second lens and the third lens on the optical axis is smaller than the air gap between the fifth lens and the sixth lens on the optical axis. The air gap between the fourth lens and the fifth lens on the optical axis is smaller than the air gap between the eighth lens and the ninth lens on the optical axis. The Abbe number of the first lens is greater than the Abbe number of the eighth lens. The Abbe number of the first lens is greater than the Abbe number of the ninth lens. The Abbe number of the sixth lens is greater than the Abbe number of the ninth lens. The thickness of the first lens on the optical axis is greater than the air gap between the sixth lens and the seventh lens on the optical axis.

8. An optical imaging lens as described in any of Request 1, Request 2, Request 3 and Request 7, wherein T4 is defined as the thickness of the fourth lens on the optical axis, T5 is defined as the thickness of the fifth lens on the optical axis, G34 is defined as the air gap between the third lens and the fourth lens on the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, D11t32 is defined as the distance from the object side of the first lens to the image side of the third lens on the optical axis, and the optical imaging lens satisfies the following condition: (D11t32+G45+T5) / (G34+T4)≦2.

800.

9. An optical imaging lens as described in any of Request 1, Request 2, Request 3 and Request 7, wherein T4 is defined as the thickness of the fourth lens on the optical axis, G34 is defined as the air gap between the third lens and the fourth lens on the optical axis, D11t22 is defined as the distance on the optical axis from the object side of the first lens to the image side of the second lens, and the optical imaging lens satisfies the following condition: (D11t22+D62t82) / (G34+T4)≦3.

400.

10. An optical imaging lens, comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, wherein each of the first to ninth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which the imaging light passes; a circumferential region of the image-side surface of the first lens is concave; and a circumferential region of the object-side surface of the ninth lens is concave; wherein, The optical imaging lens has only the aforementioned nine lenses. T9 is defined as the thickness of the ninth lens on the optical axis; G89 is defined as the air gap between the eighth and ninth lenses on the optical axis; D62t82 is defined as the distance on the optical axis between the image-side surface of the sixth lens and the image-side surface of the eighth lens; D51t62 is defined as the distance on the optical axis between the object-side surface of the fifth lens and the image-side surface of the sixth lens; Fno is defined as the aperture value of the optical imaging lens; D11t51 is defined as the distance on the optical axis between the object-side surface of the first lens and the object-side surface of the fifth lens, and satisfies Fno*(D11t51+D62t82) / D51t62≦6.300, (D6 2t82+G89+T9) / D51t62≦2.400,The air gap between the second lens and the third lens on the optical axis is smaller than the air gap between the fifth lens and the sixth lens on the optical axis; the air gap between the fourth lens and the fifth lens on the optical axis is smaller than the air gap between the eighth lens and the ninth lens on the optical axis; the Abbe number of the first lens is greater than the Abbe number of the eighth lens; the Abbe number of the first lens is greater than the Abbe number of the ninth lens; the air gap between the third lens and the fourth lens on the optical axis is greater than the air gap between the fourth lens and the fifth lens on the optical axis; the thickness of the first lens on the optical axis is greater than the air gap between the sixth lens and the seventh lens on the optical axis.

11. An optical imaging lens as described in any of claims 2, 7 and 10, wherein T3 is defined as the thickness of the third lens on the optical axis, G23 is defined as the air gap between the second lens and the third lens on the optical axis, D11t22 is defined as the distance on the optical axis from the object side of the first lens to the image side of the second lens, and the optical imaging lens satisfies the following condition: (D11t22+D62t82) / (G23+T3)≦4.

100.

12. An optical imaging lens as described in any of claims 2, 7 and 10, wherein G23 is defined as the air gap between the second lens and the third lens on the optical axis, D11t22 is defined as the distance from the object side of the first lens to the image side of the second lens on the optical axis, and the optical imaging lens satisfies the following condition: D11t22 / G23 ≦ 2.

700.

13. An optical imaging lens as described in any of Request 1, Request 2 and Request 3, wherein υ6 is defined as the Abbe number of the sixth lens, υ7 is defined as the Abbe number of the seventh lens and υ8 is defined as the Abbe number of the eighth lens, and the optical imaging lens satisfies the following condition: υ6+υ7+υ8+υ9≦175.

000.

14. An optical imaging lens as described in either Request 1 or Request 2, wherein υ4 is defined as the Abbe number of the fourth lens, υ5 is defined as the Abbe number of the fifth lens, and υ8 is defined as the Abbe number of the eighth lens, and the optical imaging lens satisfies the following condition: (υ4+υ5+υ8) / υ9≦5.

800.

15. An optical imaging lens as described in any of Request 1, Request 2, Request 7 and Request 10, wherein υ4 is defined as the Abbe number of the fourth lens and υ9 is defined as the Abbe number of the ninth lens, and the optical imaging lens satisfies the following condition: υ4+υ9≦100.

000.

16. An optical imaging lens as described in any of Request 1, Request 2, Request 3, Request 7 and Request 10, wherein D11t22 is defined as the distance on the optical axis from the object side of the first lens to the image side of the second lens, D41t52 is defined as the distance on the optical axis from the object side of the fourth lens to the image side of the fifth lens, and D22t41 is defined as the distance on the optical axis from the image side of the second lens to the object side of the fourth lens, and the optical imaging lens satisfies the following condition: (D11t22+D41t52) / D22t41≦2.

000.

17. An optical imaging lens as described in any of Request 1, Request 2, Request 3, Request 7 and Request 10, wherein EPD is defined as the entrance pupil diameter of the optical imaging lens, TTL is defined as the distance from the object side of the first lens to an imaging surface on the optical axis, and the optical imaging lens satisfies the following condition: 6.100≦(EPD+TTL) / D62t82.

18. An optical imaging lens as described in any of Request 1, Request 2, Request 3, Request 7, and Request 10, wherein D11t22 is defined as the distance on the optical axis from the object side of the first lens to the image side of the second lens, D41t52 is defined as the distance on the optical axis from the object side of the fourth lens to the image side of the fifth lens, D61t82 is defined as the distance on the optical axis from the object side of the sixth lens to the image side of the eighth lens, and D22t41 is defined as the distance on the optical axis from the image side of the second lens to the object side of the fourth lens, and the optical imaging lens satisfies the following condition: (D11t22+D41t52+D61t82) / D22t41≦4.

000.

19. An optical imaging lens as described in any of Request 1, Request 2, Request 3, Request 7 and Request 10, wherein ImgH is defined as the image height of the optical imaging lens, TL is defined as the distance on the optical axis from the object side of the first lens to the image side of the ninth lens, and the optical imaging lens satisfies the following condition: 7.000≦(ImgH+TL) / D62t82.

20. An optical imaging lens as described in any one of Request 1, Request 2, Request 3, Request 7 and Request 10, wherein EFL is defined as the effective focal length of the optical imaging lens, ImgH is defined as the image height of the optical imaging lens, D11t22 is defined as the distance on the optical axis from the object side of the first lens to the image side of the second lens, and the optical imaging lens satisfies the following condition: 10.000≦(EFL+ImgH) / D11t22.

Images