Optical imaging lens

Abstract

This invention provides an optical imaging lens. The optical imaging lens comprises eight lenses sequentially from the object side to the image side. By designing the concave and convex arrangement of the surfaces of the eight lenses, the overall length of the optical imaging lens can be shortened while maintaining both image quality and optical performance.

Description

Technical Field

[0001] This invention relates to an optical imaging lens, and more particularly to an eight-element optical imaging lens. Prior Technology

[0002] The specifications of consumer electronics products are constantly evolving, and the pursuit of thinner and smaller designs has never slowed down. Therefore, key components of electronic products, such as optical lenses, must continuously improve in terms of specifications to meet consumer demands. The most important characteristics of optical lenses are image quality and size; in addition, improving the field of view and widening the aperture are also becoming increasingly important. Regarding image quality, with the advancement of image sensing technology, consumers' requirements for image quality will also increase. Therefore, in designing optical lenses, in addition to pursuing thinness, it is also necessary to consider both image quality and performance.

[0003] However, optical lens design is not simply a matter of scaling down a high-quality lens to create an optical lens that combines image quality and miniaturization. The design process involves not only material properties but also practical production issues such as manufacturing and assembly yield.

[0004] In recent years, optical imaging lenses have continuously evolved, using the increase in the number of optical lenses to correct aberrations and chromatic aberration in order to achieve increasingly higher image quality requirements. However, with the increase in the number of optical lenses, the distance between the object side of the first lens and the imaging plane on the optical axis is larger, which is detrimental to the thinning of lenses for mobile phones, digital cameras, and automobiles. Therefore, designing an optical imaging lens that has good image quality and is both lightweight and compact has always been a design development goal. Summary of the Invention

[0005] This invention provides an optical imaging lens that can be used for capturing images and recording videos, such as optical imaging lenses for mobile phones, cameras, tablets, automotive lenses, and personal digital assistants (PDAs). Through the surface concave-convex configuration of eight lenses, it achieves thinness while maintaining image quality.

[0006] In the disclosure of this invention, the parameters listed in the following table are used, but the invention is not limited to using only these parameters: [Table 1] parameter definition T1 The thickness of the first lens on the optical axis G12 The distance on the optical axis from the image side of the first lens to the object side of the second lens. T2 The thickness of the second lens on the optical axis G23 The distance on the optical axis from the image side of the second lens to the object side of the third lens. T3 The thickness of the third lens on the optical axis G34 The distance on the optical axis from the image side of the third lens to the object side of the fourth lens. T4 The thickness of the fourth lens on the optical axis G45 The distance on the optical axis from the image side of the fourth lens to the object side of the fifth lens T5 The thickness of the fifth lens on the optical axis G56 The distance on the optical axis from the image side of the fifth lens to the object side of the sixth lens T6 Thickness of the sixth lens on the optical axis G67 The distance on the optical axis from the image side of the sixth lens to the object side of the seventh lens T7 Thickness of the seventh lens on the optical axis G78 The distance on the optical axis from the image side of the seventh lens to the object side of the eighth lens T8 Thickness of the eighth lens on the optical axis G8F The distance on the optical axis from the image side of the eighth lens to the object side of the filter. TF The thickness of the filter on the optical axis GFP Distance from the filter to the imaging plane on the optical axis f1 Focal length of the first lens f2 The focal length of the second lens f3 The focal length of the third lens f4 The focal length of the fourth lens f5 The focal length of the fifth lens f6 Focal length of the sixth lens f7 The focal length of the seventh lens f8 The focal length of the eighth lens n1 The refractive index of the first lens n2 The refractive index of the second lens n3 The refractive index of the third lens n4 The refractive index of the fourth lens n5 The refractive index of the fifth lens n6 The refractive index of the sixth lens n7 The refractive index of the seventh lens n8 The refractive index of the eighth lens V1 Abbe value of the first lens V2 Abbe number of the second lens V3 Abbe value of the third lens V4 Abbe value of the fourth lens V5 Abbe number of the fifth lens V6 Abbe value of the sixth lens V7 Abbe value of the seventh lens V8 Abbe number of the eighth lens HFOV Half angle of view of an optical imaging lens Fno Aperture value of optical imaging lens EFL Effective focal length of optical imaging lens TTL The distance on the optical axis from the object side of the first lens to the image plane ALT The total thickness of the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses along the optical axis, that is, the total thickness of the eight lenses from the first to the eighth lens along the optical axis. AAG The sum of the following distances on the optical axis: the distance from the image-side surface of the first lens to the object-side surface of the second lens, the distance from the image-side surface of the second lens to the object-side surface of the third lens, the distance from the image-side surface of the third lens to the object-side surface of the fourth lens, the distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens, the distance from the image-side surface of the fifth lens to the object-side surface of the sixth lens, the distance from the image-side surface of the sixth lens to the object-side surface of the seventh lens, and the distance from the image-side surface of the seventh lens to the object-side surface of the eighth lens; that is, the sum of the seven air gap widths on the optical axis between the first and eighth lenses. BFL The back focal length of an optical imaging lens, which is the distance on the optical axis from the image side of the eighth lens to the imaging plane. TL The distance on the optical axis from the object side of the first lens to the image side of the eighth lens

[0007] According to an embodiment of the present invention, the optical imaging lens includes, in sequence 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, and an eighth lens. Each lens has an object side facing the object side and through which imaging light passes, and an image side facing the image side and through which imaging light passes. The first lens has a concave circumferential region on its image side; the seventh lens has a convex optical axis region on its object side and a concave circumferential region on its object side; the optical imaging lens has only the above eight lenses; and the optical imaging lens satisfies condition (3): (T7+T8) / T6≦3.300 and condition (10): T1 / T8≧1.200.

[0008] According to another embodiment of the present invention, the optical imaging lens includes, in sequence 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, and an eighth lens. Each lens has 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 imaging light passes. The first lens has a concave circumferential region on its image-side surface; the seventh lens has a convex optical axis region on its object-side surface, a concave circumferential region on its object-side surface, and a concave optical axis region on its image-side surface; the optical imaging lens has only the above-mentioned eight lenses; and the optical imaging lens satisfies condition (10).

[0009] According to another embodiment of the present invention, the optical imaging lens includes, in sequence 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, and an eighth lens. Each lens has 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 imaging light passes. The first lens has a concave circumferential region on its image-side surface; the fifth lens has a convex optical axis region on its image-side surface; the seventh lens has a concave circumferential region on its object-side surface and a concave optical axis region on its image-side surface; the optical imaging lens has only the above eight lenses; and the optical imaging lens satisfies condition (10).

[0010] The above-described embodiments of the optical imaging lens may also optionally satisfy any of the following conditions: Conditional expression (1): ALT / (T1+G23)≦5.000; Condition (2): AAG / (T1+T5)≦2.500; Conditional expression (4): (T4+G45+T5) / G34≧1.500; Condition (5): EFL / (T6+T7)≧3.900; Condition (6): TL / BFL ≦ 5.500; Conditional expression (7): (T6+G67+T7+G78+T8) / (T1+G12+T2)≦2.200; Conditional expression (8): (T3+G34) / (T2+G23)≦2.800; Conditional expression (9): (T1+G12) / (T5+G56)≦2.200; Condition (11): TTL / ALT ≦ 2.200; Condition (12): AAG / (G12+G34)≧2.000; Condition (13): T1 / (G12+T2)≧1.300; Condition (14): (T3+T5) / T4≧2.500; Condition (15): (T6+T7) / T2≦3.800; Condition (16): EFL / AAG ≥ 2.200; Conditional expression (17): (G34+G45) / G23≦4.000; Conditional expression (18): (T1+T3) / G34≧1.500; Condition (19): ALT / AAG≧1.600. Simple Explanation of the Diagram

[0011] To better understand the embodiments described in this specification, please refer to the following figures: [Figure 1] illustrates a radial cross-sectional view of a lens according to one embodiment of the present invention. [Figure 2] A schematic diagram illustrating the relationship between the lens surface shape and the focal point of light in one embodiment of the present invention. [Figure 3] A diagram showing the relationship between the lens surface shape and the effective radius in Example 1. [Figure 4] A diagram showing the relationship between the lens surface shape and the effective radius in Example 2. [Figure 5] A diagram showing the relationship between the lens surface shape and the effective radius in Example 3. [Figure 6] shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens of the first embodiment of the present invention. [Figure 7] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens of the first embodiment of the present invention. [Figure 8] illustrates detailed optical data of each lens of the optical imaging lens of the first embodiment of the present invention. [Figure 9] illustrates the aspherical data of the optical imaging lens of the first embodiment of the present invention. [Figure 10] illustrates a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the second embodiment of the present invention. [Figure 11] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the second embodiment of the present invention. [Figure 12] illustrates detailed optical data of each lens of the optical imaging lens of the second embodiment of the present invention. [Figure 13] illustrates the aspherical data of the optical imaging lens of the second embodiment of the present invention. [Figure 14] illustrates a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the third embodiment of the present invention. [Figure 15] shows a schematic diagram of longitudinal spherical aberration and various aberrations of the optical imaging lens of the third embodiment of the present invention. [Figure 16] illustrates detailed optical data of each lens of the optical imaging lens of the third embodiment of the present invention. [Figure 17] illustrates the aspherical data of the optical imaging lens of the third embodiment of the present invention. [Figure 18] illustrates a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fourth embodiment of the present invention. [Figure 19] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fourth embodiment of the present invention. [Figure 20] illustrates detailed optical data of each lens of the optical imaging lens of the fourth embodiment of the present invention. [Figure 21] illustrates the aspherical data of the optical imaging lens of the fourth embodiment of the present invention. [Figure 22] shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fifth embodiment of the present invention. [Figure 23] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fifth embodiment of the present invention. [Figure 24] illustrates detailed optical data of each lens of the optical imaging lens of the fifth embodiment of the present invention. [Figure 25] illustrates the aspherical data of the optical imaging lens of the fifth embodiment of the present invention. [Figure 26] illustrates a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the sixth embodiment of the present invention. [Figure 27] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the sixth embodiment of the present invention. [Figure 28] illustrates detailed optical data of each lens of the optical imaging lens of the sixth embodiment of the present invention. [Figure 29] illustrates the aspherical data of the optical imaging lens of the sixth embodiment of the present invention. [Figure 30] illustrates a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the seventh embodiment of the present invention. [Figure 31] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the seventh embodiment of the present invention. [Figure 32] illustrates detailed optical data of each lens of the optical imaging lens of the seventh embodiment of the present invention. [Figure 33] illustrates the aspherical data of the optical imaging lens of the seventh embodiment of the present invention. [Figure 34] shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens of the eighth embodiment of the present invention. [Figure 35] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens of the eighth embodiment of the present invention. [Figure 36] illustrates detailed optical data of each lens of the optical imaging lens of the eighth embodiment of the present invention. [Figure 37] illustrates the aspherical data of the optical imaging lens of the eighth embodiment of the present invention. [Figure 38] illustrates a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the ninth embodiment of the present invention. [Figure 39] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the ninth embodiment of the present invention. [Figure 40] illustrates detailed optical data of each lens of the optical imaging lens of the ninth embodiment of the present invention. [Figure 41] illustrates the aspherical data of the optical imaging lens of the ninth embodiment of the present invention. [Figure 42] shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the tenth embodiment of the present invention. [Figure 43] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the tenth embodiment of the present invention. [Figure 44] illustrates detailed optical data of each lens of the optical imaging lens of the tenth embodiment of the present invention. [Figure 45] illustrates the aspherical data of the optical imaging lens of the tenth embodiment of the present invention. [Figure 46] shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the eleventh embodiment of the present invention. [Figure 47] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eleventh embodiment of the present invention. [Figure 48] illustrates detailed optical data of each lens of the optical imaging lens of the eleventh embodiment of the present invention. [Figure 49] illustrates the aspherical data of the optical imaging lens of the eleventh embodiment of the present invention. [Figure 50] shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the twelfth embodiment of the present invention. [Figure 51] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the twelfth embodiment of the present invention. [Figure 52] illustrates detailed optical data of each lens of the optical imaging lens of the twelfth embodiment of the present invention. [Figure 53] illustrates the aspherical data of the optical imaging lens of the twelfth embodiment of the present invention. [Figure 54] illustrates a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the thirteenth embodiment of the present invention. [Figure 55] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the thirteenth embodiment of the present invention. [Figure 56] illustrates detailed optical data of each lens of the optical imaging lens according to the thirteenth embodiment of the present invention. [Figure 57] illustrates the aspherical data of the optical imaging lens of the thirteenth embodiment of the present invention. [Figure 58] illustrates a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fourteenth embodiment of the present invention. [Figure 59] A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fourteenth embodiment of the present invention. [Figure 60] illustrates detailed optical data of each lens of the optical imaging lens according to the fourteenth embodiment of the present invention. [Figure 61] illustrates the aspherical data of the optical imaging lens of the fourteenth embodiment of the present invention. [Figures 62A and 62B] illustrate T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BF A comparison table of the values ​​of L, (T6+G67+T7+G78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34, and ALT / AAG. Implementation

[0012] 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 refractive index (or a 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 can 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.

[0013] 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 the intersection of the surface with 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, 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).

[0014] The region from the center point to the first conversion point TP1 is defined as the optical axis region, which includes the center point. The region radially outward from the Nth conversion point farthest from the optical axis I to the optical boundary OB is defined as the circumferential region. In some embodiments, a relay region may be additionally included between the optical axis region and the circumferential region; the number of relay regions depends on the number of conversion points.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] Figure 4 is a radial 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.

[0023] 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 circular 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 circular 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 circular region Z2 is convex.

[0024] 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 0-50% of the distance from the optical axis I to the optical boundary OB of the lens surface, and the circumferential region is defined as 50-100% 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.

[0025] To demonstrate that the present invention can indeed shorten the lens length while maintaining good image quality, several embodiments and their detailed optical data are provided below. Please refer to Figures 6 through 9, where Figure 6 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the first embodiment of the present invention; Figure 7 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the first embodiment of the present invention; Figure 8 shows detailed optical data of the optical imaging lens according to the first embodiment of the present invention; and Figure 9 shows the aspherical data of each lens of the optical imaging lens according to the first embodiment of the present invention.

[0026] As shown in Figure 6, the optical imaging lens 1' of this embodiment includes, from the object side A1 to the image side A2, an aperture stop 1'00, a first lens 1'10, a second lens 1'20, a third lens 1'30, a fourth lens 1'40, a fifth lens 1'50, a sixth lens 1'60, a seventh lens 1'70, and an eighth lens 1'80. A filter 1'90 and an imaging surface 1'93 of an image sensor (not shown) are both disposed on the image side A2 of the optical imaging lens 1. The first lens 1'10, the second lens 1'20, the third lens 1'30, the fourth lens 1'40, the fifth lens 1'50, the sixth lens 1'60, the seventh lens 1'70, the eighth lens 1'80, and the filter 1'90 respectively include an object-side surface 1'11 / 1'21 / 1'31 / 1'41 / 1'51 / 1'61 / 1'71 / 1'81 / 1'91 facing the object side A1 and an image-side surface 1'12 / 1'22 / 1'32 / 1'42 / 1'52 / 1'62 / 1'72 / 1'82 / 1'92 facing the image side A2. In this embodiment, the filter 1'90 is an infrared cut filter and is disposed between the eighth lens 1'80 and the imaging surface 1'93. The filter 1'90 absorbs light of a specific wavelength that has passed through the optical imaging lens 1'. For example, infrared light will be absorbed by filter 1'90, while infrared light that is invisible to the human eye will not be imaged on imaging plane 1'93.

[0027] In this embodiment, the detailed structure of each lens of the optical imaging lens 1' can be referred to the figure. The first lens 1'10, the second lens 1'20, the third lens 1'30, the fourth lens 1'40, the fifth lens 1'50, the sixth lens 1'60, the seventh lens 1'70 and the eighth lens 1'80 can be made of plastic.

[0028] In the first embodiment, the first lens 1'10 has a positive refractive index. The optical axis region 1111 and the circumferential region 1112 of the object side 1'11 of the first lens 1'10 are both convex. The optical axis region 1121 and the circumferential region 1121 of the image side 1'12 of the first lens 1'10 are both concave.

[0029] The second lens 1'20 has a negative refractive index. The optical axis region 1211 and the circumferential region 1212 of the object side 1'21 of the second lens 1'20 are both convex. The optical axis region 1221 and the circumferential region 1222 of the image side 1'22 of the second lens 1'20 are both concave.

[0030] The third lens 1'30 has a positive refractive index. The optical axis region 1311 of the object side 1'31 of the third lens 1'30 is convex, and the circumferential region 1312 of the object side 1'31 of the third lens 1'30 is concave. The optical axis region 1321 of the image side 1'32 of the third lens 1'30 is concave, and the circumferential region 1322 of the image side 1'32 of the third lens 1'30 is convex.

[0031] The fourth lens 1'40 has a negative refractive index. The optical axis region 1411 of the object side 1'41 of the fourth lens 1'40 is convex, and the circumferential region 1412 of the object side 1'41 of the fourth lens 1'40 is concave. The optical axis region 1421 of the image side 1'42 of the fourth lens 1'40 is concave, and the circumferential region 1422 of the image side 1'42 of the fourth lens 1'40 is convex.

[0032] The fifth lens 1'50 has a positive refractive index. The optical axis region 1511 and the circumferential region 1512 of the object side 1'51 of the fifth lens 1'50 are both concave. The optical axis region 1521 and the circumferential region 1522 of the image side 1'52 of the fifth lens 1'50 are both convex.

[0033] The sixth lens 1'60 has a negative refractive index. The optical axis region 1611 of the object-side surface 1'61 of the sixth lens 1'60 is convex, and the circumferential region 1612 of the object-side surface 1'61 of the sixth lens 1'60 is concave. The optical axis region 1621 of the image-side surface 1'62 of the sixth lens 1'60 is concave, and the circumferential region 1622 of the image-side surface 1'62 of the sixth lens 1'60 is convex.

[0034] The seventh lens 1'70 has a positive refractive index. The optical axis region 1711 and the circumferential region 1712 of the object side 1'71 of the seventh lens 1'70 are both convex. The optical axis region 1721 of the image side 1'72 of the seventh lens 1'70 is concave, and the circumferential region 1722 of the image side 1'72 of the seventh lens 1'70 is convex.

[0035] The eighth lens 1'80 has a negative refractive index. The optical axis region 1811 and the circumferential region 1812 of the object side surface 1'81 of the eighth lens 1'80 are both concave. The optical axis region 1821 of the image side surface 1'82 of the eighth lens 1'80 is concave, and the circumferential region 1822 of the image side surface 1'82 of the eighth lens 1'80 is convex.

[0036] The object-side surface 1'11 and image-side surface 1'12 of the first lens 1'10, the object-side surface 1'21 and image-side surface 1'22 of the second lens 1'20, the object-side surface 1'31 and image-side surface 1'32 of the third lens 1'30, the object-side surface 1'41 and image-side surface 1'42 of the fourth lens 1'40, the object-side surface 1'51 and image-side surface 1'52 of the fifth lens 1'50, the object-side surface 1'61 and image-side surface 1'62 of the sixth lens 1'60, the object-side surface 1'71 and image-side surface 1'72 of the seventh lens 1'70, and the object-side surface 1'81 and image-side surface 1'82 of the eighth lens 1'80, totaling 16 aspherical surfaces, are all defined according to the following aspherical curve formula: + Z represents the depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface at a distance Y from the optical axis and the tangent plane at the vertex on the optical axis of the aspherical surface). R represents the radius of curvature of the lens surface; Y represents the perpendicular distance between a point on the aspherical surface and the optical axis; K is the conic constant. For the 2ith order aspherical coefficient.

[0037] Please refer to Figure 9 for detailed parameter data for each aspherical surface.

[0038] Figure 7(a) illustrates the longitudinal spherical aberration for the three representative wavelengths (470nm, 555nm, 650nm) in this embodiment, where the horizontal axis is defined as focal length and the vertical axis as field of view. Figure 7(b) illustrates the field curvature aberration in the sagittal direction for the three representative wavelengths (470nm, 555nm, 650nm) in this embodiment, where the horizontal axis is defined as focal length and the vertical axis as image height. Figure 7(c) illustrates the field curvature aberration in the tangential direction for the three representative wavelengths (470nm, 555nm, 650nm) in this embodiment, where the horizontal axis is defined as focal length and the vertical axis as image height. Figure 7(d) illustrates the distortion aberration in this embodiment, where the horizontal axis represents percentage and the vertical axis represents image height. Off-axis rays at different heights for the three representative wavelengths (470nm, 555nm, 650nm) are all concentrated near the imaging point. The curves for each wavelength are very close, indicating that off-axis rays at different heights for each wavelength are concentrated near the imaging point. From the longitudinal spherical aberration of each curve in Figure 7(a), it can be seen that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.025 mm. Therefore, this embodiment significantly improves the longitudinal spherical aberration for different wavelengths. Furthermore, referring to Figure 7(b), the focal lengths of the three representative wavelengths fall within ±0.03 mm across the entire field of view. Referring to Figure 7(c), the focal lengths of the three representative wavelengths fall within ±0.07 mm across the entire field of view. Referring to the horizontal axis of Figure 7(d), the distortion aberration is maintained within ±1.2%.

[0039] In this embodiment, the length (TTL) of the object side 1'11 to the imaging plane 1'93 of the first lens 1'10 along the optical axis is approximately 5.308 mm, the aperture value (Fno) is 1.6, and the half field of view (HFOV) is 37.043 degrees. Based on the above-mentioned values, the optical imaging lens of this embodiment achieves a thin profile while maintaining image quality.

[0040] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0041] Please also refer to Figures 10 to 13, where Figure 10 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the second embodiment of the present invention, Figure 11 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the second embodiment of the present invention, Figure 12 shows detailed optical data of the optical imaging lens according to the second embodiment of the present invention, and Figure 13 shows the aspherical data of each lens of the optical imaging lens according to the second embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the reference numerals used here begin with 2 or 2', for example, the object side of the third lens is 2'31, and the image side of the third lens is 2'32. Other element reference numerals will not be described again here.

[0042] As shown in Figure 10, the optical imaging lens 2' of this embodiment includes, from the object side A1 to the image side A2, an aperture 2'00, a first lens 2'10, a second lens 2'20, a third lens 2'30, a fourth lens 2'40, a fifth lens 2'50, a sixth lens 2'60, a seventh lens 2'70, and an eighth lens 2'80.

[0043] The surface textures of the object-side surfaces 2'11, 2'21, 2'31, 2'41, 2'51, 2'61, 2'71, 2'81 and the image-side surfaces 2'22, 2'32, 2'42, 2'52, 2'62, 2'82 are generally similar to those of the first embodiment; however, the surface textures of the image-side surfaces 2'12 and 2'72 differ from those of the first embodiment. Furthermore, the optical parameters of the lens surfaces in the second embodiment—radius of curvature, lens thickness, aspherical coefficient, and effective focal length—are also different from those of the first embodiment. Specifically, the circumferential region 2122 of the image-side surface 2'12 of the first lens 2'10 is convex, and the circumferential region 2722 of the image-side surface 2'72 of the seventh lens 2'70 is concave.

[0044] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 2' of this embodiment, please refer to Figure 12.

[0045] From the longitudinal spherical aberration of each curve in Figure 11(a), it can be seen that the deviation of the imaging point of off-axis rays at different heights is controlled within ±0.012 mm. Referring to Figure 11(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 11(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.06 mm across the entire field of view. Referring to the horizontal axis of Figure 11(d), the distortion aberration of the optical imaging lens 2' is maintained within ±0.35%.

[0046] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0047] Compared to the first embodiment, this embodiment has smaller longitudinal spherical aberration, field curvature aberration in the sagittal direction, field curvature aberration in the meridional direction, and distortion aberration, and a larger half-angle of view.

[0048] Please also refer to Figures 14 to 17, where Figure 14 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the third embodiment of the present invention, Figure 15 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the third embodiment of the present invention, Figure 16 shows detailed optical data of the optical imaging lens according to the third embodiment of the present invention, and Figure 17 shows the aspherical data of each lens of the optical imaging lens according to the third embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the reference numerals used here begin with 3 or 3', for example, the object side of the third lens is 3'31, and the image side of the third lens is 3'32. Other element reference numerals will not be described again here.

[0049] As shown in Figure 14, the optical imaging lens 3' of this embodiment includes, from the object side A1 to the image side A2, an aperture 3'00, a first lens 3'10, a second lens 3'20, a third lens 3'30, a fourth lens 3'40, a fifth lens 3'50, a sixth lens 3'60, a seventh lens 3'70, and an eighth lens 3'80.

[0050] The surface textures of the object-side surfaces 3'11, 3'21, 3'31, 3'41, 3'51, 3'61, 3'71 and the image-side surfaces 3'12, 3'22, 3'32, 3'42, 3'52, 3'62, 3'82 are generally similar to those of the first embodiment. However, the surface textures of the object-side surface 3'81 and the image-side surface 3'72 differ from those of the first embodiment. Furthermore, the optical parameters of the radius of curvature, lens thickness, aspherical coefficient, and effective focal length of each lens surface in the third embodiment also differ from those of the first embodiment. Specifically, the circumferential region 3722 of the image-side surface 3'72 of the seventh lens 3'70 is concave, and the circumferential region 3812 of the object-side surface 3'81 of the eighth lens 3'80 is convex.

[0051] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 3' of this embodiment, please refer to Figure 16.

[0052] From the longitudinal spherical aberration of each curve in Figure 15(a), it can be seen that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.012 mm. Referring to Figure 15(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.035 mm across the entire field of view. Referring to Figure 15(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.05 mm across the entire field of view. Referring to the horizontal axis of Figure 15(d), the distortion aberration of the optical imaging lens 3' is maintained within ±0.14%.

[0053] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0054] Compared to the first embodiment, this embodiment has smaller longitudinal spherical aberration, meridional field curvature aberration, and distortion aberration.

[0055] Please also refer to Figures 18 to 21, where Figure 18 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fourth embodiment of the present invention, Figure 19 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fourth embodiment of the present invention, Figure 20 shows detailed optical data of the optical imaging lens according to the fourth embodiment of the present invention, and Figure 21 shows the aspherical data of each lens of the optical imaging lens according to the fourth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals used here is changed to 4 or 4', for example, the object side of the third lens is 4'31, and the image side of the third lens is 4'32. Other element reference numerals will not be described again here.

[0056] As shown in Figure 18, the optical imaging lens 4' of this embodiment includes, from the object side A1 to the image side A2, an aperture 4'00, a first lens 4'10, a second lens 4'20, a third lens 4'30, a fourth lens 4'40, a fifth lens 4'50, a sixth lens 4'60, a seventh lens 4'70, and an eighth lens 4'80.

[0057] The surface textures of the object-side surfaces 4'11, 4'21, 4'31, 4'41, 4'51, 4'61, 4'71 and the image-side surfaces 4'12, 4'22, 4'32, 4'42, 4'52, 4'62, 4'82 are generally similar to those of the first embodiment. However, the surface textures of the object-side surface 4'81 and the image-side surface 4'72 differ from those of the first embodiment. Furthermore, the optical parameters of the radius of curvature, lens thickness, aspherical coefficient, and effective focal length of each lens surface in the fourth embodiment also differ from those of the first embodiment. Specifically, the circumferential region 4722 of the image-side surface 4'72 of the seventh lens 4'70 is concave, and the circumferential region 4812 of the object-side surface 4'81 of the eighth lens 4'80 is convex.

[0058] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 4' of this embodiment, please refer to Figure 20.

[0059] From the longitudinal spherical aberration of each curve in Figure 19(a), it can be seen that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.013 mm. Referring to Figure 19(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 19(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.035 mm across the entire field of view. Referring to the horizontal axis of Figure 19(d), the distortion aberration of the optical imaging lens 4' is maintained within ±0.4%.

[0060] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0061] Compared to the first embodiment, this embodiment has smaller longitudinal spherical aberration, sagittal field curvature aberration, meridional field curvature aberration, and distortion aberration.

[0062] Please also refer to Figures 22 to 25, where Figure 22 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fifth embodiment of the present invention, Figure 23 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fifth embodiment of the present invention, Figure 24 shows detailed optical data of the optical imaging lens according to the fifth embodiment of the present invention, and Figure 25 shows the aspherical data of each lens of the optical imaging lens according to the fifth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals used here is changed to 5 or 5', for example, the object side of the third lens is 5'31, and the image side of the third lens is 5'32. Other element reference numerals will not be described again here.

[0063] As shown in Figure 22, the optical imaging lens 5' of this embodiment includes, from the object side A1 to the image side A2, an aperture 5'00, a first lens 5'10, a second lens 5'20, a third lens 5'30, a fourth lens 5'40, a fifth lens 5'50, a sixth lens 5'60, a seventh lens 5'70, and an eighth lens 5'80.

[0064] The surface irregularities of the object sides 5'11, 5'31, 5'41, 5'51, 5'61 and the image sides 5'12, 5'22, 5'32, 5'52, 5'62, 5'72, 5'82 are generally similar to those of the first embodiment. However, the surface irregularities of the object sides 5'21, 5'71, 5'81 and the image side 5'42, as well as the refractive index of the sixth lens, differ from those of the first embodiment. Furthermore, the optical parameters of the radius of curvature, lens thickness, aspherical coefficient, and effective focal length of each lens surface in the fifth embodiment also differ from those of the first embodiment. Specifically, the sixth lens has a positive refractive index, the circumferential region 5512 of the object side 5'21 of the second lens 5'20 is concave, the circumferential region 5422 of the image side 5'42 of the fourth lens 5'40 is concave, the circumferential region 5712 of the object side 5'71 of the seventh lens 5'70 is concave, and the circumferential region 5812 of the object side 5'81 of the eighth lens 5'80 is convex.

[0065] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 5' of this embodiment, please refer to Figure 24.

[0066] From the longitudinal spherical aberration of each curve in Figure 23(a), it can be seen that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.014 mm. Referring to Figure 23(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.3 mm across the entire field of view. Referring to Figure 23(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.9 mm across the entire field of view. Referring to the horizontal axis of Figure 23(d), the distortion aberration of the optical imaging lens 5' is maintained within ±0.8%.

[0067] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0068] Compared to the first embodiment, this embodiment has smaller longitudinal spherical aberration and distortion aberration, and is also easier to manufacture, resulting in a higher yield.

[0069] Please also refer to Figures 26 to 29, where Figure 26 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the sixth embodiment of the present invention, Figure 27 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the sixth embodiment of the present invention, Figure 28 shows detailed optical data of the optical imaging lens according to the sixth embodiment of the present invention, and Figure 29 shows the aspherical data of each lens of the optical imaging lens according to the sixth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals is changed to 6, for example, the object side of the third lens is 631, and the image side of the third lens is 632. Other element reference numerals will not be described again here.

[0070] As shown in Figure 26, the optical imaging lens 6 of this embodiment includes, from the object side A1 to the image side A2, an aperture 600, a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670 and an eighth lens 680.

[0071] The surface irregularities of the object-side surfaces 611, 621, 641, 651, 661, 671 and the image-side surfaces 612, 622, 632, 642, 652, 662, 672, 682 are generally similar to those of the first embodiment; however, the surface irregularities of the object-side surfaces 631 and 681 differ from those of the first embodiment. Furthermore, the optical parameters of the lens surfaces in the sixth embodiment—radius of curvature, lens thickness, aspherical coefficient, and effective focal length—are also different from those of the first embodiment. Specifically, the circumferential region 6312 of the object-side surface 631 of the third lens 630 is convex, and the circumferential region 6812 of the object-side surface 681 of the eighth lens 680 is also convex.

[0072] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 6 of this embodiment, please refer to Figure 28.

[0073] From the longitudinal spherical aberration of each curve in Figure 27(a), it can be seen that the deviation of the imaging point of off-axis rays at different heights is controlled within ±0.016 mm. Referring to Figure 27(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 27(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.03 mm across the entire field of view. Referring to the horizontal axis of Figure 27(d), the distortion aberration of the optical imaging lens 6 is maintained within ±1%.

[0074] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0075] Compared to the first embodiment, this embodiment has smaller longitudinal spherical aberration, sagittal field curvature aberration, meridional field curvature aberration, and distortion aberration.

[0076] Please also refer to Figures 30 to 33, where Figure 30 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the seventh embodiment of the present invention, Figure 31 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the seventh embodiment of the present invention, Figure 32 shows detailed optical data of the optical imaging lens according to the seventh embodiment of the present invention, and Figure 33 shows the aspherical data of each lens of the optical imaging lens according to the seventh embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals is changed to 7, for example, the object side of the third lens is 731, and the image side of the third lens is 732. Other element reference numerals will not be described again here.

[0077] As shown in Figure 30, the optical imaging lens 7 of this embodiment includes, from the object side A1 to the image side A2, an aperture 700, a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770 and an eighth lens 780.

[0078] The surface irregularities of the object-side surfaces 711, 731, 741, 751, 761, 781 and the image-side surfaces 712, 722, 732, 742, 752, 762, 772, 782 are generally similar to those of the first embodiment; however, the surface irregularities of the object-side surfaces 721 and 771 differ from those of the first embodiment. Furthermore, the optical parameters of the lens surfaces in the seventh embodiment—radius of curvature, lens thickness, aspherical coefficient, and effective focal length—are also different from those of the first embodiment. Specifically, the circumferential region 7212 of the object-side surface 721 of the second lens 720 is concave, and the circumferential region 7712 of the object-side surface 771 of the seventh lens 770 is concave.

[0079] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 7 of this embodiment, please refer to Figure 32.

[0080] From the longitudinal spherical aberration of each curve in Figure 31(a), it can be seen that the deviation of the imaging point of off-axis rays at different heights is controlled within ±0.035 mm. Referring to Figure 31(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.04 mm across the entire field of view. Referring to Figure 31(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.14 mm across the entire field of view. Referring to the horizontal axis of Figure 31(d), the distortion aberration of the optical imaging lens 7 is maintained within ±2%.

[0081] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0082] Compared to the first embodiment, this embodiment is easier to manufacture and therefore has a higher yield.

[0083] Please also refer to Figures 34 to 37, where Figure 34 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the eighth embodiment of the present invention, Figure 35 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eighth embodiment of the present invention, Figure 36 shows detailed optical data of the optical imaging lens according to the eighth embodiment of the present invention, and Figure 37 shows the aspherical data of each lens of the optical imaging lens according to the eighth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the reference numerals begin with 8, for example, the object side of the third lens is 831, and the image side of the third lens is 832. Other element reference numerals will not be described again here.

[0084] As shown in Figure 34, the optical imaging lens 8 of this embodiment includes, from the object side A1 to the image side A2, an aperture 800, a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, a seventh lens 870 and an eighth lens 880.

[0085] The surface textures of the object-side surfaces 811, 821, 831, 841, 851, 861, 871 and the image-side surfaces 822, 832, 842, 852, 862, 872, 882 are generally similar to those of the first embodiment. However, the surface textures of the object-side surface 881 and the image-side surface 812 are different from those of the first embodiment. Furthermore, the optical parameters of the lens surfaces in the eighth embodiment, such as the radius of curvature, lens thickness, aspherical coefficient, and effective focal length, are also different from those of the first embodiment. Specifically, the circumferential region 8122 of the image-side surface 812 of the first lens 810 is convex, and the circumferential region 8812 of the object-side surface 881 of the eighth lens 880 is convex.

[0086] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 8 of this embodiment, please refer to Figure 36.

[0087] From the longitudinal spherical aberration of each curve in Figure 35(a), it can be seen that the deviation of the imaging point of off-axis rays at different heights is controlled within ±0.018 mm. Referring to Figure 35(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 35(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.025 mm across the entire field of view. Referring to the horizontal axis of Figure 35(d), the distortion aberration of the optical imaging lens 8 is maintained within ±1.4%.

[0088] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0089] Compared to the first embodiment, the longitudinal spherical aberration, the field curvature aberration in the sagittal direction, and the field curvature aberration in the meridional direction are smaller in this embodiment.

[0090] Please also refer to Figures 38 to 41, where Figure 38 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the ninth embodiment of the present invention, Figure 39 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the ninth embodiment of the present invention, Figure 40 shows detailed optical data of the optical imaging lens according to the ninth embodiment of the present invention, and Figure 41 shows the aspherical data of each lens of the optical imaging lens according to the ninth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the reference numerals begin with 9, for example, the object side of the third lens is 931, and the image side of the third lens is 932. Other element reference numerals will not be described again here.

[0091] As shown in Figure 38, the optical imaging lens 9 of this embodiment includes, from the object side A1 to the image side A2, an aperture 900, a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, a seventh lens 970 and an eighth lens 980.

[0092] The surface irregularities of the object-side surfaces 911, 921, 931, 941, 951, 961, 971 and the image-side surfaces 912, 922, 932, 942, 952, 962, 972, 982 are generally similar to those of the first embodiment. However, the surface irregularity of the object-side surface 981 and the refractive indices of the first lens 910, third lens 930, fifth lens 950, and seventh lens 970 differ from those of the first embodiment. Furthermore, the optical parameters of the lens surfaces in the ninth embodiment, such as the radius of curvature, lens thickness, aspherical coefficient, and effective focal length, also differ from those of the first embodiment. Specifically, the circumferential region 9812 of the object-side surface 981 of the eighth lens 980 is convex.

[0093] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 9 of this embodiment, please refer to Figure 40.

[0094] From the longitudinal spherical aberration of each curve in Figure 39(a), it can be seen that the deviation of the imaging point of off-axis rays at different heights is controlled within ±0.015 mm. Referring to Figure 39(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 39(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.06 mm across the entire field of view. Referring to the horizontal axis of Figure 39(d), the distortion aberration of the optical imaging lens 9 is maintained within ±1%.

[0095] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0096] Compared to the first embodiment, the longitudinal spherical aberration, sagittal field curvature aberration, meridional field curvature aberration, and distortion aberration in this embodiment are smaller.

[0097] Please also refer to Figures 42 to 45, where Figure 42 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the tenth embodiment of the present invention, Figure 43 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the tenth embodiment of the present invention, Figure 44 shows detailed optical data of the optical imaging lens according to the tenth embodiment of the present invention, and Figure 45 shows the aspherical data of each lens of the optical imaging lens according to the tenth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals is changed to 10, for example, the object side of the third lens is 1031, and the image side of the third lens is 1032. Other element reference numerals will not be described again here.

[0098] As shown in Figure 42, the optical imaging lens 10 of this embodiment includes, from the object side A1 to the image side A2, an aperture 1000, a first lens 1010, a second lens 1020, a third lens 1030, a fourth lens 1040, a fifth lens 1050, a sixth lens 1060, a seventh lens 1070 and an eighth lens 1080.

[0099] The surface textures of the object-side surfaces 1011, 1021, 1031, 1041, 1051, 1061, 1071 and the image-side surfaces 1022, 1032, 1042, 1052, 1062 in the tenth embodiment are generally similar to those in the first embodiment. However, the surface textures of the object-side surfaces 1081, 1012, 1072, 1082 differ from those in the first embodiment. Furthermore, the optical parameters of the lens surfaces in the tenth embodiment—radius of curvature, lens thickness, aspherical coefficient, and effective focal length—are also different from those in the first embodiment. Specifically, the circumferential region 10122 of the image-side surface 1012 of the first lens 1010 is convex, the circumferential region 10722 of the image-side surface 1072 of the seventh lens 1070 is concave, and the circumferential region 10812 of the object-side surface 1081 of the eighth lens 1080 is convex and the circumferential region 10822 of the image-side surface 1082 is concave.

[0100] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 10 of this embodiment, please refer to Figure 44.

[0101] From the longitudinal spherical aberration of each curve in Figure 43(a), it can be seen that the deviation of the imaging point of off-axis rays at different heights is controlled within ±0.025 mm. Referring to Figure 43(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.05 mm across the entire field of view. Referring to Figure 43(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.06 mm across the entire field of view. Referring to the horizontal axis of Figure 43(d), the distortion aberration of the optical imaging lens 10 is maintained within ±2%.

[0102] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0103] Compared to the first embodiment, the field curvature aberration in the meridional direction is smaller in this embodiment.

[0104] Please also refer to Figures 46 to 49, where Figure 46 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the eleventh embodiment of the present invention, Figure 47 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eleventh embodiment of the present invention, Figure 48 shows detailed optical data of the optical imaging lens according to the eleventh embodiment of the present invention, and Figure 49 shows the aspherical data of each lens of the optical imaging lens according to the eleventh embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals used here is changed to 11', for example, the object side of the third lens is 11'31, and the image side of the third lens is 11'32. Other element reference numerals will not be described again here.

[0105] As shown in Figure 46, the optical imaging lens 11' of this embodiment includes, from the object side A1 to the image side A2, an aperture 11'00, a first lens 11'10, a second lens 11'20, a third lens 11'30, a fourth lens 11'40, a fifth lens 11'50, a sixth lens 11'60, a seventh lens 11'70, and an eighth lens 11'80.

[0106] The surface irregularities of the object-side surfaces 11'11, 11'21, 11'41, 11'51, 11'61, 11'71, 11'81 and the image-side surfaces 11'12, 11'22, 11'32, 11'42, 11'52, 11'62, 11'82 are generally similar to those of the first embodiment. However, the surface irregularities of the object-side surface 11'31 and the image-side surface 11'72 differ from those of the first embodiment. Furthermore, the optical parameters of the lens surfaces in the eleventh embodiment, such as the radius of curvature, lens thickness, aspherical coefficient, and effective focal length, also differ from those of the first embodiment. Specifically, the circumferential region 11'312 of the object-side surface 11'31 of the third lens 11'30 is convex, and the circumferential region 11'722 of the image-side surface 11'72 of the seventh lens 11'70 is concave.

[0107] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 11' of this embodiment, please refer to Figure 48.

[0108] From the longitudinal spherical aberration of each curve in Figure 47(a), it can be seen that the deviation of the imaging point of off-axis rays at different heights is controlled within ±0.025 mm. Referring to Figure 47(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 47(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.12 mm across the entire field of view. Referring to the horizontal axis of Figure 47(d), the distortion aberration of the optical imaging lens 11' is maintained within ±2.5%.

[0109] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0110] Compared to the first embodiment, the field curvature aberration in the sagittal direction of this embodiment is smaller.

[0111] Please also refer to Figures 50 to 53, where Figure 50 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the twelfth embodiment of the present invention, Figure 51 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the twelfth embodiment of the present invention, Figure 52 shows detailed optical data of the optical imaging lens according to the twelfth embodiment of the present invention, and Figure 53 shows the aspherical data of each lens of the optical imaging lens according to the twelfth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals is changed to 12', for example, the object side of the third lens is 12'31, and the image side of the third lens is 12'32. Other element reference numerals will not be described again here.

[0112] As shown in Figure 50, the optical imaging lens 12' of this embodiment includes, from the object side A1 to the image side A2, an aperture 12'00, a first lens 12'10, a second lens 12'20, a third lens 12'30, a fourth lens 12'40, a fifth lens 12'50, a sixth lens 12'60, a seventh lens 12'70, and an eighth lens 12'80.

[0113] The surface irregularities of the object-side surfaces 12'11, 12'21, 12'31, 12'41, 12'51, 12'61 and the image-side surfaces 12'12, 12'22, 12'32, 12'42, 12'52, 12'62, 12'82 are generally similar to those of the first embodiment. However, the surface irregularities of the object-side surfaces 12'71 and 12'81 and the image-side surface 12'72 are different from those of the first embodiment. Furthermore, the optical parameters of the radius of curvature, lens thickness, aspherical coefficient, and effective focal length of each lens surface in the twelfth embodiment are also different from those of the first embodiment. Specifically, the circumferential region 12'712 of the object-side surface 12'71 of the seventh lens 12'70 is concave, and the circumferential region 12'722 of the image-side surface 12'72 is concave. The circumferential region 12'812 of the object-side surface 12'81 of the eighth lens 12'80 is convex.

[0114] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 12' of this embodiment, please refer to Figure 52.

[0115] From the longitudinal spherical aberration of each curve in Figure 51(a), it can be seen that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.015 mm. Referring to Figure 51(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 51(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.05 mm across the entire field of view. Referring to the horizontal axis of Figure 51(d), the distortion aberration of the optical imaging lens 12' is maintained within ±2%.

[0116] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0117] Compared to the first embodiment, the longitudinal spherical aberration, the field curvature aberration in the sagittal direction, and the field curvature aberration in the meridional direction are smaller in this embodiment.

[0118] Please also refer to Figures 54 to 57, where Figure 54 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the thirteenth embodiment of the present invention, Figure 55 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the thirteenth embodiment of the present invention, Figure 56 shows detailed optical data of the optical imaging lens according to the thirteenth embodiment of the present invention, and Figure 57 shows the aspherical data of each lens of the optical imaging lens according to the thirteenth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals used here is changed to 13', for example, the object side of the third lens is 13'31, and the image side of the third lens is 13'32. Other element reference numerals will not be described again here.

[0119] As shown in Figure 54, the optical imaging lens 13' of this embodiment includes, from the object side A1 to the image side A2, an aperture 13'00, a first lens 13'10, a second lens 13'20, a third lens 13'30, a fourth lens 13'40, a fifth lens 13'50, a sixth lens 13'60, a seventh lens 13'70, and an eighth lens 13'80.

[0120] The surface irregularities of the object-side surfaces 13'11, 13'21, 13'31, 13'41, 13'51, 13'61, 13'71, 13'81 and the image-side surfaces 13'12, 13'22, 13'32, 13'42, 13'52, 13'62, 13'72, 13'82 are generally similar to those of the first embodiment. Furthermore, the optical parameters of the lens surfaces in the thirteenth embodiment—radius of curvature, lens thickness, aspherical coefficient, and effective focal length—are also different from those in the first embodiment.

[0121] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 13' of this embodiment, please refer to Figure 56.

[0122] From the longitudinal spherical aberration of each curve in Figure 55(a), it can be seen that the deviation of the imaging point of off-axis rays at different heights is controlled within ±0.012 mm. Referring to Figure 55(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 55(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.05 mm across the entire field of view. Referring to the horizontal axis of Figure 55(d), the distortion aberration of the optical imaging lens 13' is maintained within ±1%.

[0123] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0124] Compared to the first embodiment, the longitudinal spherical aberration, sagittal field curvature aberration, meridional field curvature aberration, and distortion aberration in this embodiment are smaller.

[0125] Please also refer to Figures 58 to 61, where Figure 58 shows a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fourteenth embodiment of the present invention, Figure 59 shows a schematic diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fourteenth embodiment of the present invention, Figure 60 shows detailed optical data of the optical imaging lens according to the fourteenth embodiment of the present invention, and Figure 61 shows the aspherical data of each lens of the optical imaging lens according to the fourteenth embodiment of the present invention. In this embodiment, similar reference numerals are used to identify similar elements as in the first embodiment, except that the prefix of the reference numerals is changed to 14', for example, the object side of the third lens is 14'31, and the image side of the third lens is 14'32. Other element reference numerals will not be described again here.

[0126] As shown in Figure 58, the optical imaging lens 14' of this embodiment includes, from the object side A1 to the image side A2, an aperture 14'00, a first lens 14'10, a second lens 14'20, a third lens 14'30, a fourth lens 14'40, a fifth lens 14'50, a sixth lens 14'60, a seventh lens 14'70, and an eighth lens 14'80.

[0127] The surface irregularities of the object-side surfaces 14'11, 14'21, 14'31, 14'41, 14'51, 14'61, 14'71, and 14'81, and the image-side surfaces 14'12, 14'22, 14'32, 14'42, 14'52, 14'62, 14'72, and 14'82 are generally similar to those of the first embodiment. However, the optical parameters of the fourteenth embodiment, including the radius of curvature, lens thickness, aspherical coefficient, and effective focal length of each lens surface, are also different from those of the first embodiment.

[0128] To illustrate this embodiment more clearly, the features of the lens surface's concave-convex configuration are only marked where they differ from those in the first embodiment, while the reference numerals for the similarities are omitted. For the optical characteristics of each lens in the optical imaging lens 14' of this embodiment, please refer to Figure 60.

[0129] From the longitudinal spherical aberration of each curve in Figure 59(a), it can be seen that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.014 mm. Referring to Figure 59(b), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02 mm across the entire field of view. Referring to Figure 59(c), the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.09 mm across the entire field of view. Referring to the horizontal axis of Figure 59(d), the distortion aberration of the optical imaging lens 14' is maintained within ±1.2%.

[0130] Regarding the T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G For the values ​​of 78+T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG, please refer to Figures 62A and 62B.

[0131] Compared to the first embodiment, the longitudinal spherical aberration and the field curvature aberration in the sagittal direction are smaller in this embodiment.

[0132] Figures 62A and 62B list the following fourteen embodiments: T1, G12, T2, G23, T3, G34, T4, G45, T5, G56, T6, G67, T7, G78, T8, G8F, TF, GFP, AAG, ALT, BFL, TTL, TL, EFL, ALT / (T1+G23), AAG / (T1+T5), (T7+T8) / T6, (T4+G45+T5) / G34, EFL / (T6+T7), TL / BFL, (T6+G67+T7+G78) The values ​​of +T8) / (T1+G12+T2), (T3+G34) / (T2+G23), (T1+G12) / (T5+G56), T1 / T8, TTL / ALT, AAG / (G12+G34), T1 / (G12+T2), (T3+T5) / T4, (T6+T7) / T2, EFL / AAG, (G34+G45) / G23, (T1+T3) / G34 and ALT / AAG show that the optical imaging lens of the present invention can indeed satisfy the aforementioned conditions (1) to (19). Various embodiments of the present invention provide an optical imaging lens with a small aperture value (Fno.) and good image quality. This is achieved through the combination of concave and convex designs of the lens elements, for example: the circumferential region of the image-side surface of the first lens is concave; the optical axis region of the image-side surface of the third lens is concave; the circumferential region of the image-side surface of the fourth lens is convex; the circumferential region of the image-side surface of the fifth lens is convex; the optical axis region of the object-side surface of the sixth lens is convex; and the seventh lens has positive refractive index; the optical axis region of the image-side surface of the seventh lens is concave, in order to correct spherical aberration and aberrations in the optical system and reduce distortion. Alternatively, the circumferential region of the object-side surface of the third lens and the optical axis region of the image-side surface may be concave; the circumferential region of the image-side surface of the fourth lens may be convex; the circumferential region of the image-side surface of the fifth lens may be convex; the optical axis region of the object-side surface of the sixth lens may be convex; the seventh lens has positive refractive index; and the optical axis region of the image-side surface of the seventh lens is concave. Alternatively, the circumferential region of the image-side surface of the first lens is concave; the optical axis region of the object-side surface of the fourth lens is convex and the circumferential region of the image-side surface is convex; the circumferential region of the image-side surface of the fifth lens is convex; the optical axis region of the object-side surface of the sixth lens is convex; the seventh lens has positive refractive index; and the optical axis region of the image-side surface of the seventh lens is concave.

[0133] To shorten the length of the lens system and ensure image quality, reducing the air gap between lenses or appropriately shortening the lens thickness is one approach in this invention. However, considering the ease of manufacturing, the embodiments of this invention selectively satisfy the following conditional numerical limitations to achieve a better configuration: Condition (1): ALT / (T1+G23)≦5.000, with a preferred range of 2.600≦ALT / (T1+G23)≦5.000; Condition (2): AAG / (T1+T5)≦2.500, the preferred range is 0.400≦AAG / (T1+T5)≦2.500; Condition (3): (T7+T8) / T6≦3.300, the preferred range is 1.200≦(T7+T8) / T6≦3.300; Condition (4): (T4+G45+T5) / G34≧1.500, the preferred range is 6.200≧(T4+G45+T5) / G34≧1.500; Condition (5): EFL / (T6+T7)≧3.900, the preferred range is 8.000≧EFL / (T6+T7)≧3.900; Condition (6): TL / BFL≦5.500, the preferred range is 4.400≦TL / BFL≦5.500; Conditional expression (7): (T6+G67+T7+G78+T8) / (T1+G12+T2)≦2.200, the preferred range is 1.000≦(T6+G67+T7+G78+T8) / (T1+G12+T2)≦2.200; Condition (8): (T3+G34) / (T2+G23)≦2.800, the preferred range is 1.600≦(T3+G34) / (T2+G23)≦2.800; Condition (9): (T1+G12) / (T5+G56)≦2.200, the preferred range is 0.700≦(T1+G12) / (T5+G56)≦2.200; Condition (10): T1 / T8 ≥ 1.200, the preferred range is 3.300 ≥ T1 / T8 ≥ 1.200; Condition (11): TTL / ALT ≦ 2.200, with a preferred range of 1.300 ≦ TTL / ALT ≦ 2.200; Condition (12): AAG / (G12+G34)≧2.000, the preferred range is 3.300≧AAG / (G12+G34)≧2.000; Condition (13): T1 / (G12+T2)≧1.300, the preferred range is 2.800≧T1 / (G12+T2)≧1.300; Condition (14): (T3+T5) / T4≧2.500, the preferred range is 7.000≧(T3+T5) / T4≧2.500; Condition (15): (T6+T7) / T2≦3.800, the preferred range is 2.300≦(T6+T7) / T2≦3.800; Condition (16): EFL / AAG ≥ 2.200, with a preferred range of 4.700 ≥ EFL / AAG ≥ 2.200; Conditional expression (17): (G34+G45) / G23≦4.000, the preferred range is 1.600≦(G34+G45) / G23≦4.000; Condition (18): (T1+T3) / G34≧1.500, the preferred range is 6.500≧(T1+T3) / G34≧1.500; Condition (19): ALT / AAG≧1.600, the preferred range is 4.700≧ALT / AAG≧1.600.

[0134] The numerical ranges, including the maximum and minimum values, obtained from the combined proportional relationships of the optical parameters disclosed in the various embodiments of the present invention can all be implemented accordingly.

[0135] The longitudinal spherical aberration, field curvature aberration, and distortion of the various embodiments of this invention all meet the usage specifications. Furthermore, off-axis light rays of the three representative wavelengths (red, green, and blue) at different heights are all concentrated near the imaging point. The skewing amplitude of each curve shows that the imaging point deviation of off-axis light rays at different heights is controlled, demonstrating excellent spherical aberration, aberration, and distortion suppression capabilities. Further review of the imaging quality data reveals that the distances between the three representative wavelengths (red, green, and blue) are also quite close, indicating that this invention exhibits excellent concentration of light rays of different wavelengths under various conditions and thus excellent dispersion suppression capabilities. Therefore, it is evident from the above that this invention possesses excellent optical performance.

[0136] In view of the unpredictability of optical system design, under the framework of the present invention, meeting the above conditions can better shorten the lens length, reduce spherical aberration, aberration and distortion of the optical system, expand the field of view of the optical imaging system and improve the imaging quality, or improve the assembly yield and thus improve the shortcomings of the prior art.

[0137] The above description is based on several different embodiments of the present invention, wherein each feature may be implemented individually or in different combinations. Therefore, the disclosure of embodiments of the present invention is a specific example illustrating the principles of the present invention and should not limit the present invention to the disclosed embodiments. Furthermore, the foregoing description and accompanying drawings are merely illustrative of the present invention and are not intended to limit it. Variations or combinations of other elements are possible and do not depart from the spirit and scope of the present invention.

[0138] 12: 100, 200, 300, 400, 500: Lenses 110, 410, 510: Side view of the object 120, 320: side view 130: Assembly Department 211, 212: Parallel rays 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: Main Ray Lm: Edge ray EL: Extension line Z1: Optical axis region Z2: Circular area Z3: Relay Area M, R: Intersection points 1', 2', 3', 4', 5', 6, 7, 8, 9, 10, 11', 12', 13', 14': Optical imaging lens 1'00, 2'00, 3'00, 4'00, 5'00, 600, 700, 800, 900, 1000, 11'00, 12'00, 13'00, 14'00: Aperture 1'10, 2'10, 3'10, 4'10, 5'10, 6'10, 7'10, 8'10, 9'10, 10'10, 11'10, 12'10, 13'10, 14'10: First lens 1'20, 2'20, 3'20, 4'20, 5'20, 6'20, 7'20, 8'20, 9'20, 10'20, 11'20, 12'20, 13'20, 14'20: Second lens 1'30, 2'30, 3'30, 4'30, 5'30, 6'30, 7'30, 8'30, 9'30, 10'30, 11'30, 12'30, 13'30, 14'30: Third lens 1'40, 2'40, 3'40, 4'40, 5'40, 640, 740, 840, 940, 1040, 11'40, 12'40, 13'40, 14'40: Fourth lens 1'50, 2'50, 3'50, 4'50, 5'50, 6'50, 7'50, 8'50, 9'50, 10'50, 11'50, 12'50, 13'50, 14'50: Fifth lens 1'60, 2'60, 3'60, 4'60, 5'60, 660, 760, 860, 960, 1060, 11'60, 12'60, 13'60, 14'60: Sixth Lens 1'70, 2'70, 3'70, 4'70, 5'70, 6'70, 7'70, 8'70, 9'70, 10'70, 11'70, 12'70, 13'70, 14'70: Seventh Lens 1'80, 2'80, 3'80, 4'80, 5'80, 680, 780, 880, 980, 1080, 11'80, 12'80, 13'870, 14'80: Eighth lens 1'90, 2'90, 3'90, 4'90, 5'90, 6'90, 7'90, 8'90, 9'90, 10'90, 11'90, 12'90, 13'90, 14'90: Filters 1'93, 2'93, 3'93, 4'93, 5'93, 6'93, 7'93, 8'93, 9'93, 10'93, 11'93, 12'93, 13'93, 14'93: Imaging plane 1'11, 1'21, 1'31, 1'41, 1'51, 1'61, 1'71, 1'81, 1'91', 2'11, 2'21, 2'31, 2'41, 2'51, 2'61, 2'71, 2'81, 2'91, 3'11, 3'21, 3'31, 3'41, 3'51, 3'61, 3'71, 3'81, 3'91, 4'11, 4'21, 4'31, 4'41, 4' 51, 4'61, 4'71, 4'81, 4'91, 5'11, 5'21, 5'31, 5'41, 5'51, 5'61, 5'71, 5'81, 5'91, 611, 621, 631, 641, 651, 661, 671, 681, 691, 711, 721, 731, 741, 751, 761, 771, 781, 791, 811, 821, 831, 841, 85 1, 861, 871, 881, 891, 911, 921, 931, 941, 951, 961, 971, 981, 991, 1011, 1021, 1031, 1041, 1051, 1061, 1071, 1081, 1091, 11'11, 11'21, 11'31, 11'41, 11'51, 11'61, 11'71, 11'81, 11'91, 12'11 12'21, 12'31, 12'41, 12'51, 12'61, 12'71, 12'81, 12'91, 13'11, 13'21, 13'31, 13'41, 13'51, 13'61, 13'71, 13'81, 13'91, 14'11, 14'21, 14'31, 14'41, 14'51, 14'61, 14'71, 14'81, 14'91: Object side 1'12, 1'22, 1'32, 1'42, 1'52, 1'62, 1'72, 1'82, 1'92, 2'12, 2'22, 2'32, 2'42, 2'52, 2'62, 2'72, 2'82, 2'92, 3'12, 3'22, 3'32, 3'42, 3'52, 3'62, 3'72, 3'82, 3'92, 4'12, 4'22, 4'32, 4'42, 4 '52、4'62、4'72、4'82、4'92、5'12、5'22、5'32、5'42、5'52、5'62、5'72、5'82、5'92、612、622、632、642、652、662、672、682、692、712、722、732、742、752、762、772、782、792、812、822、832、842、8 52, 862, 872, 882, 892, 912, 922, 932, 942, 952, 962, 972, 982, 992, 1012, 1022, 1032, 1042, 1052, 1062, 1072, 1082, 1092, 11'12, 11'22, 11'32, 11'42, 11'52, 11'62, 11'72, 11'82, 11'92, 12' 12, 12'22, 12'32, 12'42, 12'52, 12'62, 12'72, 12'82, 12'92, 13'12, 13'22, 13'32, 13'42, 13'52, 13'62, 13'72, 13'82, 13'92, 14'12, 14'22, 14'32, 14'42, 14'52, 14'62, 14'72, 14'82, 14'92 (Side view) 1111, 1121, 1211, 1221, 1311, 1321, 1411, 1421, 1511, 1521, 1611, 1621, 1711, 1721, 1811, 1821: Optical axis region 1112, 1122, 1212, 1222, 1312, 1322, 1412, 1422, 1512, 1522, 1612, 1622, 172, 1812, 1822, 2122, 3722, 3812, 4722, 4812, 5212, 5422, 5712, 5812, 6312, 6812, 7212, 7712, 8122, 8812, 9812, 10122, 10722, 10812, 10822, 11'312, 11'722, 12'712, 12'722, 12'812: Circumferential Area

[0139] none

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, and an eighth lens, each lens having an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through, wherein: The first lens has a concave circumferential region on its image side; the seventh lens has a convex optical axis region on its object side, and the seventh lens also has a concave circumferential region on its object side; the optical imaging lens has only the above eight lenses; and the optical imaging lens satisfies the following conditions: (T7+T8) / T6≦3.300 and T1 / T8≧1.200; where T7 represents the thickness of the seventh lens on the optical axis, T8 represents the thickness of the eighth lens on the optical axis, T6 represents the thickness of the sixth lens on the optical axis, and T1 represents the thickness of the first lens 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, and an eighth lens, each lens having an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through, wherein: The first lens has a concave circumferential region on the image side; the seventh lens has a convex optical axis region on the object side, a concave circumferential region on the object side, and a concave optical axis region on the image side; the optical imaging lens has only the above eight lenses; and the optical imaging lens satisfies the condition: T1 / T8≧1.200; Where T1 represents the thickness of the first lens on the optical axis, and T8 represents the thickness of the eighth lens 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, and an eighth lens, each lens having an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through, wherein: The first lens has a concave circumferential region on its image side; the fourth lens has a convex optical axis region on its object side; the fifth lens has a convex optical axis region on its image side; the seventh lens has a concave circumferential region on its object side and a concave optical axis region on its image side; the optical imaging lens has only the above eight lenses; and the optical imaging lens satisfies the condition: T1 / T8≧1.200; Where T1 represents the thickness of the first lens on the optical axis, and T8 represents the thickness of the eighth lens on the optical axis.

4. An optical imaging lens as described in claim 2 or 3, wherein T6 represents the thickness of the sixth lens on the optical axis, G67 represents the distance on the optical axis from the image side of the sixth lens to the object side of the seventh lens, T7 represents the thickness of the seventh lens on the optical axis, G78 represents the distance on the optical axis from the image side of the seventh lens to the object side of the eighth lens, G12 represents the distance on the optical axis from the image side of the first lens to the object side of the second lens, and T2 represents the thickness of the second lens on the optical axis, and the optical imaging lens satisfies the condition: (T6+G67+T7+G78+T8) / (T1+G12+T2)≦2.

200.

5. An optical imaging lens as described in claim 2 or 3, wherein T6 represents the thickness of the sixth lens on the optical axis, T7 represents the thickness of the seventh lens on the optical axis, and T2 represents the thickness of the second lens on the optical axis, and the optical imaging lens satisfies the condition: (T6+T7) / T2≦3.

800.

6. An optical imaging lens as described in claim 2 or 3, wherein EFL represents the effective focal length of the optical imaging lens, T6 represents the thickness of the sixth lens on the optical axis, T7 represents the thickness of the seventh lens on the optical axis, and the optical imaging lens satisfies the condition: EFL / (T6+T7)≧3.

900.

7. An optical imaging lens as described in claim 1, 2 or 3, wherein G12 represents a distance on the optical axis from the image side of the first lens to the object side of the second lens, T5 represents the thickness of the fifth lens on the optical axis, and G56 represents a distance on the optical axis from the image side of the fifth lens to the object side of the sixth lens, and the optical imaging lens satisfies the condition: (T1+G12) / (T5+G56)≦2.

200.

8. An optical imaging lens as described in claim 1, 2 or 3, wherein ALT represents the total thickness of the eight lenses from the first lens to the eighth lens on the optical axis, G23 represents the distance from the image side of the second lens to the object side of the third lens on the optical axis, and the optical imaging lens satisfies the condition: ALT / (T1+G23)≦5.

000.

9. An optical imaging lens as described in claim 1, 2 or 3, wherein T3 represents the thickness of the third lens on the optical axis, G34 represents the distance from the image side of the third lens to the object side of the fourth lens on the optical axis, and the optical imaging lens satisfies the condition: (T1+T3) / G34≧1.

500.

10. An optical imaging lens as claimed in claim 1, 2 or 3, wherein AAG represents the sum of the widths of the seven air gaps on the optical axis between the first lens to the eighth lens, T5 represents the thickness of the fifth lens on the optical axis, and the optical imaging lens satisfies the condition: AAG / (T1+T5)≦2.

500.

11. An optical imaging lens as claimed in claim 1, 2 or 3, wherein T4 represents the thickness of the fourth lens on the optical axis, G45 represents the distance on the optical axis from the image side of the fourth lens to the object side of the fifth lens, T5 represents the thickness of the fifth lens on the optical axis, and G34 represents the distance on the optical axis from the image side of the third lens to the object side of the fourth lens, and the optical imaging lens satisfies the condition: (T4+G45+T5) / G34≧1.

500.

12. An optical imaging lens as claimed in claim 1, 2 or 3, wherein T3 represents the thickness of the third lens on the optical axis, G34 represents the distance on the optical axis from the image side of the third lens to the object side of the fourth lens, T2 represents the thickness of the second lens on the optical axis, G23 represents the distance on the optical axis from the image side of the second lens to the object side of the third lens, and the optical imaging lens satisfies the condition: (T3+G34) / (T2+G23)≦2.

800.

13. An optical imaging lens as claimed in claim 1, 2 or 3, wherein AAG represents the sum of the widths of the seven air gaps on the optical axis between the first lens and the eighth lens, G12 represents the distance on the optical axis from the image side of the first lens to the object side of the second lens, and G34 represents the distance on the optical axis from the image side of the third lens to the object side of the fourth lens, and the optical imaging lens satisfies the condition: AAG / (G12+G34)≧2.

000.

14. An optical imaging lens as claimed in claim 1, 2 or 3, wherein G12 represents the distance on the optical axis from the image side of the first lens to the object side of the second lens, and T2 represents the thickness of the second lens on the optical axis, and the optical imaging lens satisfies the condition: T1 / (G12+T2)≧1.

300.

15. An optical imaging lens as claimed in claim 1, 2 or 3, wherein G34 represents the distance on the optical axis from the image side of the third lens to the object side of the fourth lens, G45 represents the distance on the optical axis from the image side of the fourth lens to the object side of the fifth lens, and G23 represents the distance on the optical axis from the image side of the second lens to the object side of the third lens, and the optical imaging lens satisfies the condition: (G34+G45) / G23≦4.

000.

16. An optical imaging lens as claimed in claim 1, 2 or 3, wherein ALT represents the total thickness of the eight lenses from the first lens to the eighth lens on the optical axis, and AAG represents the total width of the seven air gaps between the first lens to the eighth lens on the optical axis, and the optical imaging lens satisfies the condition: ALT / AAG ≥ 1.

600.

17. An optical imaging lens as claimed in claim 1, 2 or 3, wherein TTL represents the distance from the object side of the first lens to an imaging surface on the optical axis, ALT represents the total thickness of the eight lenses from the first lens to the eighth lens on the optical axis, and the optical imaging lens satisfies the condition: TTL / ALT ≦ 2.

200.

18. The optical imaging lens as described in claim 1, 2, or 3, wherein the optical imaging lens further comprises: The optical axis region on the side of the eighth lens is concave.

19. The optical imaging lens as described in claim 1, 2, or 3, wherein the optical imaging lens further comprises: The seventh lens has a positive refractive index.

20. The optical imaging lens as described in claim 1, 2, or 3, wherein the optical imaging lens further comprises: The eighth lens has a negative refractive index.

Images