Optical imaging lens

Abstract

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

Description

[0001] This invention patent application is a divisional application. The original application number is 201711481864.X, the application date is December 29, 2017, and the invention title is: Optical Imaging Lens. Technical Field

[0002] This invention relates to the field of optical imaging, and more particularly to an optical imaging lens. Background Technology

[0003] 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 continue to rise. Therefore, in designing optical lenses, in addition to pursuing thinness, it is also necessary to consider both image quality and performance.

[0004] However, optical lens design is not simply a matter of scaling down a high-quality lens to create an optical lens that combines both image quality and miniaturization. The design process involves not only material properties but also practical production issues such as manufacturing and assembly yield.

[0005] 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

[0006] To achieve the above objectives, this invention proposes an optical imaging lens that can be used to capture images and videos, such as optical imaging lenses for mobile phones, cameras, tablet computers, automotive lenses, and personal digital assistants (PDAs). Through the surface concave-convex configuration of eight lenses, it achieves thinness while maintaining image quality.

[0007] In the disclosure of this invention specification, the parameters listed in the following table are used, but the invention is not limited to using only these parameters:

[0008] Table 1 Parameter Definition Table

[0009]

[0010]

[0011]

[0012] According to an embodiment of the present invention, an optical imaging lens is provided, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens along an optical axis from an object side to an image side. 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 positive refractive index, and the optical axis region of the image-side surface of the first lens is concave, as is the circumferential region of the image-side surface of the first lens. The second lens has a negative refractive index. The third lens has a positive refractive index. At least one of the fourth and sixth lenses has a negative refractive index. The fifth lens has a positive refractive index, and the optical axis region of the image-side surface of the fifth lens is convex. The optical axis region of the image-side surface of the sixth lens is concave. The seventh lens has a positive refractive index, and the optical axis region of the image-side surface of the seventh lens is concave. The eighth lens has a negative refractive index. The optical imaging lens has only the aforementioned eight lenses with refractive indices.

[0013] According to an embodiment of the present invention, an optical imaging lens is provided, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens along an optical axis from an object side to an image side. 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. Specifically: the first lens has a positive refractive index or the eighth lens has a negative refractive index; the circumferential region of the image-side surface of the first lens is concave; the second lens has a negative refractive index; at least three of the third, fifth, sixth, and seventh lenses have positive refractive indices; the fourth lens has a negative refractive index; the optical imaging lens has only the aforementioned eight lenses with refractive indices; and the optical imaging lens satisfies the condition: (T7+T8) / T6≦3.300.

[0014] According to an embodiment of the present invention, an optical imaging lens is provided, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens along an optical axis from an object side to an image side. 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. Specifically: the first lens has a positive refractive index or the eighth lens has a negative refractive index; at least two of the second, third, fifth, and sixth lenses have positive refractive indices; the optical axis region of the image-side surface of the third lens is concave; the fourth lens has a negative refractive index; the seventh lens has a positive refractive index; the optical imaging lens has only the aforementioned eight lenses with refractive indices; and the optical imaging lens satisfies the condition: (G34+G45) / G23≦4.000.

[0015] The above-described embodiments of the optical imaging lens may also optionally satisfy any of the following conditions:

[0016] Condition (1): ALT / (T1+G23)≦5.000;

[0017] Condition (2): AAG / (T1+T5)≦2.500;

[0018] Condition (3): (T4+G45+T5) / G34≧1.500;

[0019] Condition (4): EFL / (T6+T7)≧3.900;

[0020] Condition (5): TL / BFL ≦ 5.500;

[0021] Conditional expression (6): (T6+G67+T7+G78+T8) / (T1+G12+T2)≦2.200;

[0022] Condition (7): (T3+G34) / (T2+G23)≦2.800;

[0023] Condition (8): (T1+G12) / (T5+G56)≦2.200;

[0024] Condition (9): T1 / T8 ≥ 1.200;

[0025] Condition (10): TTL / ALT ≦ 2.200;

[0026] Condition (11): AAG / (G12+G34)≧2.000;

[0027] Condition (12): T1 / (G12+T2)≧1.300;

[0028] Condition (13): (T3+T5) / T4≧2.500;

[0029] Condition (14): (T6+T7) / T2≦3.800;

[0030] Condition (15): EFL / AAG ≥ 2.200;

[0031] Condition (16): (T1+T3) / G34≧1.500; and

[0032] Condition (17): ALT / AAG≧1.600.

[0033] This invention, through the design of the concave-convex configuration of the eight lens surfaces, enables the overall length of the optical imaging lens to be shortened while simultaneously maintaining both image quality and optical performance. Attached Figure Description

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

[0035] Figure 2 This is a schematic diagram illustrating the relationship between the lens surface shape and the focal point of light in one embodiment of the present invention.

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

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

[0038] Figure 5 This is a diagram showing the relationship between the lens surface shape and the effective radius in Example 3.

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

[0040] Figure 7 This is 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.

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

[0042] Figure 9 This is a tabular diagram of the aspherical data of the optical imaging lens according to the first embodiment of the present invention.

[0043] Figure 10 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the second embodiment of the present invention.

[0044] Figure 11 This is 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.

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

[0046] Figure 13 This is a tabular diagram of the aspherical data of the optical imaging lens according to the second embodiment of the present invention.

[0047] Figure 14 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the third embodiment of the present invention.

[0048] Figure 15 This is 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.

[0049] Figure 16 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the third embodiment of the present invention.

[0050] Figure 17 This is a tabular diagram of the aspherical data of the optical imaging lens according to the third embodiment of the present invention.

[0051] Figure 18 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fourth embodiment of the present invention.

[0052] Figure 19 This is 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.

[0053] Figure 20 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the fourth embodiment of the present invention.

[0054] Figure 21 This is a tabular diagram of the aspherical data of the optical imaging lens according to the fourth embodiment of the present invention.

[0055] Figure 22 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fifth embodiment of the present invention.

[0056] Figure 23 This is 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.

[0057] Figure 24 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the fifth embodiment of the present invention.

[0058] Figure 25This is a tabular diagram of the aspherical data of the optical imaging lens according to the fifth embodiment of the present invention.

[0059] Figure 26 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the sixth embodiment of the present invention.

[0060] Figure 27 This is 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.

[0061] Figure 28 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the sixth embodiment of the present invention.

[0062] Figure 29 This is a tabular diagram of the aspherical data of the optical imaging lens according to the sixth embodiment of the present invention.

[0063] Figure 30 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the seventh embodiment of the present invention.

[0064] Figure 31 This is 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.

[0065] Figure 32 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the seventh embodiment of the present invention.

[0066] Figure 33 This is a tabular diagram of the aspherical data of the optical imaging lens according to the seventh embodiment of the present invention.

[0067] Figure 34 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the eighth embodiment of the present invention.

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

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

[0070] Figure 37 This is a tabular diagram of the aspherical data of the optical imaging lens according to the eighth embodiment of the present invention.

[0071] Figure 38 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the ninth embodiment of the present invention.

[0072] Figure 39 This is 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.

[0073] Figure 40 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the ninth embodiment of the present invention.

[0074] Figure 41 This is a tabular diagram of the aspherical data of the optical imaging lens according to the ninth embodiment of the present invention.

[0075] Figure 42 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the tenth embodiment of the present invention.

[0076] Figure 43 This is 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.

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

[0078] Figure 45 This is a tabular diagram of the aspherical data of the optical imaging lens according to the tenth embodiment of the present invention.

[0079] Figure 46 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the eleventh embodiment of the present invention.

[0080] Figure 47 This is 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.

[0081] Figure 48 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the eleventh embodiment of the present invention.

[0082] Figure 49 This is a tabular diagram of the aspherical data of the optical imaging lens according to the eleventh embodiment of the present invention.

[0083] Figure 50 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the twelfth embodiment of the present invention.

[0084] Figure 51 This is 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.

[0085] Figure 52 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the twelfth embodiment of the present invention.

[0086] Figure 53 This is a tabular diagram of the aspherical data of the optical imaging lens according to the twelfth embodiment of the present invention.

[0087] Figure 54This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the thirteenth embodiment of the present invention.

[0088] Figure 55 This is 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.

[0089] Figure 56 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the thirteenth embodiment of the present invention.

[0090] Figure 57 This is a tabular diagram of the aspherical data of the optical imaging lens according to the thirteenth embodiment of the present invention.

[0091] Figure 58 This is a schematic diagram of the lens cross-sectional structure of the optical imaging lens according to the fourteenth embodiment of the present invention.

[0092] Figure 59 This is 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.

[0093] Figure 60 This is a detailed optical data table diagram of each lens of the optical imaging lens according to the fourteenth embodiment of the present invention.

[0094] Figure 61 This is a tabular diagram of the aspherical data of the optical imaging lens according to the fourteenth embodiment of the present invention.

[0095] Figure 62A The values ​​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+ A comparison table of the values ​​of 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.

[0096] Figure 62BThe values ​​of 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) are from embodiments 8-14 of the present invention. A comparison table of the values ​​of +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. Detailed Implementation

[0097] Before describing the invention in detail, the symbols in the accompanying drawings are clearly explained: 100 lens; 110 object side; 120 image side; 130 assembly part; 200 lens; 211 parallel ray; 212 parallel ray; 300 lens; 320 image side; 400 lens; 410 object side; 500 lens; 510 object side; A1 object side; A2 image side; CP center point; CP1 first center point; CP2 second center point; TP1 first conversion point; TP2 second conversion point; OB optical boundary; I optical axis; Lc principal ray; Lm marginal ray; EL extension line; Z1 optical axis region; Z2 circumferential region; Z3 relay region; M intersection point; R intersection point; 1', 2'. 3', 4', 5', 6, 7, 8, 9, 10, 11', 12', 13', 14' Optical imaging lenses; 1'00, 2'00, 3'00, 4'00, 5'00, 600, 700, 800, 900, 1000, 11'00, 12'00, 13'00, 14'00 Apertures; 1'10, 2'10, 3'10, 4'10, 5'10, 610, 710, 810, 910, 1010, 11'10, 12'10, 13'10, 14'10 First lenses; 1'20, 2'20, 3'20, 4'20, 5'20, 620, 720, 820, 920, 1020, 11 Second lenses: 1'20, 12'20, 13'20, 14'20; Third lenses: 1'30, 2'30, 3'30, 4'30, 5'30, 630, 730, 830, 930, 1030, 11'30, 12'30, 13'30, 14'30; Fourth lenses: 1'40, 2'40, 3'40, 4'40, 5'40, 640, 740, 840, 940, 1040, 11'40, 12'40, 13'40, 14'40; Fourth lenses: 1'50, 2'50, 3'50, 4'50, 5'50, 650, 750, 850, 950, 1050, 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, 670, 770, 870, 970, 1070, 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;Filters with diameters of 1'90, 2'90, 3'90, 4'90, 5'90, 690, 790, 890, 990, 1090, 11'90, 12'90, 13'90, and 14'90; Imaging planes with diameters of 1'93, 2'93, 3'93, 4'93, 5'93, 693, 793, 893, 993, 1093, 11'93, 12'93, 13'93, and 14'93; and imaging planes with diameters of 1'11, 1'21, 1'31, 1'41, 1'51, 1'61, 1'71, 1'81, 1'91', and 2'90. 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, 6 51, 661, 671, 681, 691, 711, 721, 731, 741, 751, 761, 771, 781, 791, 811, 821, 831, 841, 851, 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 (side view of the object);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, 852, 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, 11'9 2, 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, 17 21, 1811, 1821 optical axis regions; 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 circular regions.

[0098] The optical system described in this specification includes at least one lens that receives imaging rays incident on the optical system from parallel to the optical axis to within a half-angle (HFOV) relative to the optical axis. The imaging rays pass through the optical system and form an image on the imaging plane. The statement "a lens has a positive (or negative) refractive index" means that the paraxial refractive index of the lens, calculated using Gaussian optics theory, is positive (or negative). The statement "the 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) (e.g., ...). Figure 1 (As shown). The object side (or image side) of the lens can be divided into different regions depending on the 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.

[0099] Figure 1 This 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 point of this surface and the optical axis I. For example... Figure 1 As illustrated, 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. Furthermore, if a single lens surface has multiple transition points, these transition points are named sequentially from the first transition point in a radially outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (as shown in the example), and the third transition point TP2 (as shown in the example) are named sequentially from the first transition point in a radially outward direction. Figure 4 (as shown) and the Nth conversion point (farthest from optical axis I).

[0100] 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.

[0101] 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.

[0102] In addition, see Figure 1The lens 100 may also include an assembly portion 130 extending radially outward from the optical boundary OB. The assembly portion 130 is generally used for assembling the lens 100 into a corresponding component of an optical system (not shown). Imaging rays do not reach the assembly portion 130. The structure and shape of the assembly portion 130 are merely illustrative examples of the invention and are not intended to limit the scope of the invention. The assembly portion 130 of the lens discussed below may be partially or entirely omitted in the drawings.

[0103] See Figure 2 Define the region between the center point CP and the first conversion point TP1 as the optical axis region Z1. Define the region between the first conversion point TP1 and the optical boundary OB of the lens surface as the circumferential region Z2. For example... Figure 2 As shown, parallel ray 211 intersects optical axis I at the image side A2 of lens 200 after passing through optical axis region Z1. That is, the focal point of parallel ray 211 passing through optical axis region Z1 is located at point R on the image side A2 of lens 200. Since the ray intersects optical axis I at the image side A2 of lens 200, optical axis region Z1 is convex. Conversely, parallel ray 212 diverges after passing through circular region Z2. Figure 2 As shown, the extension EL of parallel ray 212 after passing through the circular region Z2 intersects the optical axis I at the object side A1 of the lens 200. That is, the focal point of parallel ray 212 after passing through the circular region Z2 is located at point M on the object side A1 of the lens 200. Since the extension EL of the ray intersects the optical axis I at the object side A1 of the lens 200, the circular region Z2 is concave. Figure 2 In the lens 200 shown, 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.

[0104] 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.

[0105] Figures 3 to 5 Examples of determining the surface shape and boundaries of the lens region in various situations are provided, including the aforementioned optical axis region, circumferential region, and relay region.

[0106] Figure 3 This is a radial sectional view of lens 300. See also... 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 circumferential region Z2 of the image-side surface 320 of lens 300 are as follows... Figure 3 As shown. The R value of the side surface 320 of this image is positive (i.e., R>0), therefore, the optical axis region Z1 is concave.

[0107] Generally, the surface shape of each region bounded by a transition point will be opposite to that of its adjacent regions. Therefore, the transition point can be used to define the change in surface shape, i.e., from the transition point, a surface changes from concave to convex or from convex to concave. Figure 3 In the middle, since the optical axis region Z1 is concave and its shape changes at the transition point TP1, the circumferential region Z2 is convex.

[0108] Figure 4 This is a radial sectional view of lens 400. See also... 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.

[0109] The area between the second conversion point TP2 and the optical boundary OB of the object-side surface 410 of the lens 400 is defined as a circumferential region Z2, which is also a convex surface. Furthermore, 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. See again. 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 located between the first conversion point TP1 and the second conversion point TP2, and the circumferential region Z2 between the second conversion point TP2 and the optical boundary OB of the object-side surface 410 of the lens 400. Since the optical axis region Z1 is convex, and its surface shape changes to concave from the first conversion point TP1, the relay region Z3 is concave. Furthermore, its surface shape changes to convex again from the second conversion point TP2, so the circumferential region Z2 is convex.

[0110] Figure 5This is a radial sectional view of lens 500. The object-side surface 510 of lens 500 has no transition point. For a lens surface without a transition point, such as the object-side surface 510 of lens 500, the optical axis region is defined as 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface, and the circumferential region is defined as 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface. See also Figure 5 The lens 500 shown defines the optical axis region Z1 of the object-side surface 510 as 50% of the distance from the optical axis I to the optical boundary OB of the lens 500 surface. The R value of 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 the lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0111] To illustrate 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 the following: Figures 6 to 9 ,in Figure 6 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to a first embodiment of the present invention is shown. Figure 7 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to a first embodiment of the present invention is shown. Figure 8 Detailed optical data of the optical imaging lens according to the first embodiment of the present invention are illustrated. Figure 9 The aspherical data of each lens of the optical imaging lens according to the first embodiment of the present invention are illustrated.

[0112] like Figure 6As shown, 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 193 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.

[0113] In this embodiment, the detailed structure of each lens of the optical imaging lens 1' can be referred to the diagram. 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] The eighth lens 1'80 has a negative refractive index. The optical axis region 1811 and the circumferential region 1812 of the object side 1'81 of the eighth lens 1'80 are both concave. The optical axis region 1821 of the image side 1'82 of the eighth lens 1'80 is concave, and the circumferential region 1822 of the image side 1'82 of the eighth lens 1'80 is convex.

[0122] 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:

[0123]

[0124] 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).

[0125] R represents the radius of curvature of the lens surface;

[0126] Y represents the perpendicular distance between a point on the aspherical surface and the optical axis;

[0127] K is the conic constant;

[0128] a 2i The second-order aspherical coefficients.

[0129] Please refer to the detailed parameter data for each aspherical surface. Figure 9 .

[0130] Figure 7 (a) illustrates a schematic diagram of longitudinal spherical aberration for three representative wavelengths (470nm, 555nm, 650nm) in this embodiment, where the horizontal axis is defined as focal length and the vertical axis is defined as field of view. Figure 7 (b) illustrates the field curvature aberration in the sagittal direction for three representative wavelengths (470nm, 555nm, 650nm) in this embodiment, with the horizontal axis defined as focal length and the vertical axis defined as image height. Figure 7 (c) illustrates a schematic diagram of field curvature aberrations in the meridional direction for three representative wavelengths (470nm, 555nm, 650nm) in this embodiment, where the horizontal axis is defined as focal length and the vertical axis is defined as image height. Figure 7 Figure (d) illustrates the distortion aberration of this embodiment, with the horizontal axis representing percentage and the vertical axis representing image height. Off-axis light 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 light rays at different heights for each wavelength are concentrated near the imaging point. From... Figure 7 In (a), the longitudinal spherical aberration of each curve shows 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 at different wavelengths. Furthermore, see [reference needed]. Figure 7 (b) shows that the focal lengths of the three representative wavelengths fall within ±0.03 mm across the entire field of view. See also... Figure 7 (c) indicates that the focal lengths of the three representative wavelengths fall within ±0.07 mm across the entire field of view. See also... Figure 7 The distortion aberration is maintained within ±1.2% on the horizontal axis of (d).

[0131] 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-angle 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.

[0132] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0133] Please refer to the following as well. Figures 10 to 13 ,in Figure 10 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to a second embodiment of the present invention is shown. Figure 11 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to a second embodiment of the present invention is shown. Figure 12 Detailed optical data of an optical imaging lens according to a second embodiment of the present invention are illustrated. Figure 13The aspherical data of each lens of the optical imaging lens according to the second embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this 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 component reference numerals will not be described again here.

[0134] like Figure 10 As shown, 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.

[0135] 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.

[0136] 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 .

[0137] from Figure 11 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.012 mm. (See also...) Figure 11 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 11 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.06mm across the entire field of view. See also Figure 11 The distortion aberration of the optical imaging lens 2' is maintained within ±0.35% along the horizontal axis of (d).

[0138] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0139] 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.

[0140] Please refer to the following as well. Figures 14 to 17 ,in Figure 14 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to a third embodiment of the present invention is shown. Figure 15 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to a third embodiment of the present invention is shown. Figure 16 Detailed optical data of an optical imaging lens according to a third embodiment of the present invention are illustrated. Figure 17 The aspherical data of each lens of the optical imaging lens according to the third embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this 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, the image side of the third lens is 3'32, and the reference numerals of other components are not described here.

[0141] like Figure 14 As shown, 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.

[0142] 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.

[0143] 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 .

[0144] from Figure 15 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.012 mm. (See also...) Figure 15 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.035mm across the entire field of view. See also... Figure 15 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.05mm across the entire field of view. See also Figure 15 The distortion aberration of the optical imaging lens 3' is maintained within ±0.14% along the horizontal axis of (d).

[0145] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0146] Compared to the first embodiment, this embodiment has smaller longitudinal spherical aberration, meridional field curvature aberration, and distortion aberration.

[0147] Please refer to the following as well. Figures 18 to 21 ,in Figure 18 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to a fourth embodiment of the present invention is shown. Figure 19 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to a fourth embodiment of the present invention is shown. Figure 20 Detailed optical data of the optical imaging lens according to the fourth embodiment of the present invention are illustrated. Figure 21 The aspherical data of each lens of the optical imaging lens according to the fourth embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals used here begin with 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 component reference numerals will not be described again here.

[0148] like Figure 18 As shown, 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.

[0149] 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.

[0150] 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 .

[0151] from Figure 19 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.013 mm. (See also...) Figure 19 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 19 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.035mm across the entire field of view. See also Figure 19 The distortion aberration of the optical imaging lens 4' is maintained within ±0.4% along the horizontal axis of (d).

[0152] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0153] Compared to the first embodiment, this embodiment has smaller longitudinal spherical aberration, sagittal field curvature aberration, meridional field curvature aberration, and distortion aberration.

[0154] Please refer to the following as well. Figures 22 to 25 ,in Figure 22 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to a fifth embodiment of the present invention is shown. Figure 23 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to a fifth embodiment of the present invention is shown. Figure 24 Detailed optical data of an optical imaging lens according to a fifth embodiment of the present invention are illustrated. Figure 25 The aspherical data of each lens of the optical imaging lens according to the fifth embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals used here begin with 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 component reference numerals will not be described again here.

[0155] like Figure 22 As shown, 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.

[0156] 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.

[0157] 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 .

[0158] from Figure 23 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.014 mm. (See also...) Figure 23 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.3mm across the entire field of view. See also... Figure 23 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.9mm across the entire field of view. See also Figure 23 The distortion aberration of the optical imaging lens 5' is maintained within ±0.8% along the horizontal axis of (d).

[0159] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0160] 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.

[0161] Please refer to the following as well. Figures 26 to 29 ,in Figure 26 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to a sixth embodiment of the present invention is shown. Figure 27 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to a sixth embodiment of the present invention is shown. Figure 28 Detailed optical data of an optical imaging lens according to a sixth embodiment of the present invention are illustrated. Figure 29 The aspherical data of each lens of the optical imaging lens according to the sixth embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals used here start with 6, for example, the object side of the third lens is 631, the image side of the third lens is 632, and the reference numerals of other components are not described here.

[0162] like Figure 26 As shown, 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.

[0163] 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.

[0164] 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 .

[0165] from Figure 27 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.016 mm. (See also...) Figure 27 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 27 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.03mm across the entire field of view. See also Figure 27 The distortion aberration of the optical imaging lens 6 is maintained within ±1% along the horizontal axis of (d).

[0166] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0167] Compared to the first embodiment, this embodiment has smaller longitudinal spherical aberration, sagittal field curvature aberration, meridional field curvature aberration, and distortion aberration.

[0168] Please refer to the following as well. Figures 30 to 33 ,in Figure 30 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to a seventh embodiment of the present invention is shown. Figure 31 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to the seventh embodiment of the present invention is shown. Figure 32 Detailed optical data of an optical imaging lens according to a seventh embodiment of the present invention are illustrated. Figure 33 The aspherical data of each lens of the optical imaging lens according to the seventh embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals start with 7, for example, the object side of the third lens is 731, and the image side of the third lens is 732. Other component reference numerals will not be described again here.

[0169] like Figure 30 As shown, 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.

[0170] 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.

[0171] 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 .

[0172] from Figure 31 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.035 mm. (See also...) Figure 31(b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.04mm across the entire field of view. See also... Figure 31 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.14mm across the entire field of view. See also Figure 31 The distortion aberration of the optical imaging lens 7 is maintained within ±2% along the horizontal axis of (d).

[0173] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0174] Compared to the first embodiment, this embodiment is easier to manufacture and therefore has a higher yield.

[0175] Please refer to the following as well. Figures 34 to 37 ,in Figure 34 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to the eighth embodiment of the present invention is shown. Figure 35 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to the eighth embodiment of the present invention is shown. Figure 36 Detailed optical data of the optical imaging lens according to the eighth embodiment of the present invention are illustrated. Figure 37 The aspherical data of each lens of the optical imaging lens according to the eighth embodiment of the present invention are illustrated. Similar components are identified in this embodiment using similar reference numerals 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 component reference numerals will not be described again here.

[0176] like Figure 34As shown, 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.

[0177] The surface irregularities 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 irregularities 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 radius of curvature, lens thickness, aspherical coefficient, and effective focal length of each lens surface in the eighth embodiment 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.

[0178] 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 .

[0179] from Figure 35 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.018 mm. (See also...) Figure 35 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 35 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.025mm across the entire field of view. See also Figure 35 The distortion aberration of the optical imaging lens 8 is maintained within ±1.4% along the horizontal axis of (d).

[0180] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0181] 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.

[0182] Please refer to the following as well. Figures 38 to 41 ,in Figure 38 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to the ninth embodiment of the present invention is shown. Figure 39 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to the ninth embodiment of the present invention is shown. Figure 40 Detailed optical data of an optical imaging lens according to a ninth embodiment of the present invention are illustrated. Figure 41 The aspherical data of each lens of the optical imaging lens according to the ninth embodiment of the present invention are illustrated. Similar components are identified in this embodiment using similar reference numerals 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 component reference numerals are not described here.

[0183] like Figure 38 As shown, 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.

[0184] 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.

[0185] 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 .

[0186] from Figure 39 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.015 mm. (See also...) Figure 39 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 39 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.06mm across the entire field of view. See also Figure 39 The distortion aberration of the optical imaging lens 9 is maintained within ±1% along the horizontal axis of (d).

[0187] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62Aand Figure 62B .

[0188] 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.

[0189] Please refer to the following as well. Figures 42 to 45 ,in Figure 42 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to the tenth embodiment of the present invention is shown. Figure 43 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to the tenth embodiment of the present invention is shown. Figure 44 Detailed optical data of an optical imaging lens according to the tenth embodiment of the present invention are illustrated. Figure 45 The aspherical data of each lens of the optical imaging lens according to the tenth embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals used here begin with 10, for example, the object side of the third lens is 1031, the image side of the third lens is 1032, and the reference numerals of other components are not described here.

[0190] like Figure 42 As shown, 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.

[0191] The surface irregularities of the object-side surfaces 1011, 1021, 1031, 1041, 1051, 1061, 1071 and the image-side surfaces 1022, 1032, 1042, 1052, 1062 are generally similar to those of the first embodiment. However, the surface irregularities of the object-side surfaces 1081, 1012, 1072, 1082 are different from those of 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 of 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 and the circumferential region 10822 of the image-side surface 1082 are concave.

[0192] 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 .

[0193] from Figure 43 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.025 mm. (See also...) Figure 43 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.05mm across the entire field of view. See also... Figure 43 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.06mm across the entire field of view. See also Figure 43 The distortion aberration of the optical imaging lens 10 is maintained within ±2% along the horizontal axis of (d).

[0194] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0195] Compared to the first embodiment, the field curvature aberration in the meridional direction is smaller in this embodiment.

[0196] Please refer to the following as well. Figures 46 to 49 ,in Figure 46 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to the eleventh embodiment of the present invention is shown. Figure 47 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to the eleventh embodiment of the present invention is shown. Figure 48 Detailed optical data of the optical imaging lens according to the eleventh embodiment of the present invention are illustrated. Figure 49The aspherical data of each lens of the optical imaging lens according to the eleventh embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals used here begin with 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 component reference numerals will not be described again here.

[0197] like Figure 46 As shown, 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.

[0198] 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 radius of curvature, lens thickness, aspherical coefficient, and effective focal length of each lens surface in the eleventh embodiment 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.

[0199] 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 .

[0200] from Figure 47 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.025 mm. (See also...) Figure 47 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 47 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.12mm across the entire field of view. See also Figure 47 The distortion aberration of the optical imaging lens 11' is maintained within ±2.5% along the horizontal axis of (d).

[0201] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0202] Compared to the first embodiment, the field curvature aberration in the sagittal direction of this embodiment is smaller.

[0203] Please refer to the following as well. Figures 50 to 53 ,in Figure 50 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to the twelfth embodiment of the present invention is shown. Figure 51 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to the twelfth embodiment of the present invention is shown. Figure 52 Detailed optical data of the optical imaging lens according to the twelfth embodiment of the present invention are illustrated. Figure 53 The aspherical data of each lens of the optical imaging lens according to the twelfth embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals used here begin with 12', for example, the object side of the third lens is 12'31, the image side of the third lens is 12'32, and the reference numerals of other components are not described here.

[0204] like Figure 50 As shown, 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.

[0205] 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 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.

[0206] 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 .

[0207] from Figure 51 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.015 mm. (See also...) Figure 51 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 51 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.05mm across the entire field of view. See also Figure 51 The distortion aberration of the optical imaging lens 12' is maintained within ±2% along the horizontal axis of (d).

[0208] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0209] 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.

[0210] Please refer to the following as well. Figures 54 to 57 ,in Figure 54 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to the thirteenth embodiment of the present invention is shown. Figure 55 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to the thirteenth embodiment of the present invention is shown. Figure 56 Detailed optical data of an optical imaging lens according to the thirteenth embodiment of the present invention are illustrated. Figure 57 The aspherical data of each lens of the optical imaging lens according to the thirteenth embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals used here begin with 13', for example, the object side of the third lens is 13'31, the image side of the third lens is 13'32, and the reference numerals of other components are not described here.

[0211] like Figure 54 As shown, 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.

[0212] 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, including the radius of curvature, lens thickness, aspherical coefficient, and effective focal length, are also different from those in the first embodiment.

[0213] 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 .

[0214] from Figure 55 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.012 mm. (See also...) Figure 55 (b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 55 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.05mm across the entire field of view. See also Figure 55 The distortion aberration of the optical imaging lens 13' is maintained within ±1% along the horizontal axis of (d).

[0215] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0216] 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.

[0217] Please refer to the following as well. Figures 58 to 61 ,in Figure 58 A schematic diagram of the lens cross-sectional structure of an optical imaging lens according to the fourteenth embodiment of the present invention is shown. Figure 59 A schematic diagram illustrating the longitudinal spherical aberration and various aberrations of an optical imaging lens according to the fourteenth embodiment of the present invention is shown. Figure 60 Detailed optical data of the optical imaging lens according to the fourteenth embodiment of the present invention are illustrated. Figure 61 The aspherical data of each lens of the optical imaging lens according to the fourteenth embodiment of the present invention are illustrated. Similar reference numerals as in the first embodiment are used to identify similar components in this embodiment, except that the reference numerals used here begin with 14', for example, the object side of the third lens is 14'31, the image side of the third lens is 14'32, and the reference numerals of other components are not described here.

[0218] like Figure 58 As shown, 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.

[0219] 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.

[0220] 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 .

[0221] from Figure 59 In (a), the longitudinal spherical aberration of each curve shows that the deviation of the imaging point for off-axis rays at different heights is controlled within ±0.014 mm. (See also...) Figure 59(b) shows that the focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.02mm across the entire field of view. See also... Figure 59 (c) The focal lengths of the three representative wavelengths (470nm, 555nm, 650nm) fall within ±0.09mm across the entire field of view. See also Figure 59 The distortion aberration of the optical imaging lens 14' is maintained within ±1.2% along the horizontal axis of (d).

[0222] 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) in this embodiment For the values ​​of +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, please refer to [the provided text]. Figure 62A and Figure 62B .

[0223] Compared to the first embodiment, the longitudinal spherical aberration and the field curvature aberration in the sagittal direction are smaller in this embodiment.

[0224] Figure 62A and Figure 62BThe fourteen examples listed above are 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+T8) / The values ​​of (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).

[0225] 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 lenses; for example, the optical axis region on the image side of the first lens is concave; the circumferential region on the object side of the fifth lens is concave, and the optical axis region on the image side is convex; the optical axis region on the image side of the sixth lens is concave; and the optical axis region on the image side of the seventh lens is concave. This corrects spherical aberration and aberrations in the optical system and reduces distortion. Furthermore, the second lens has a negative refractive index, which helps to expand the field of view of the optical imaging system.

[0226] To shorten the length of the lens system while ensuring image quality, reducing the air gap between lenses or appropriately shortening the lens thickness is one approach employed in this invention. However, considering the ease of manufacturing, the embodiments of this invention satisfy the following numerical limitations to achieve a better configuration:

[0227] Condition (1): ALT / (T1+G23)≦5.000, the preferred range is 2.600≦ALT / (T1+G23)≦5.000;

[0228] Condition (2): AAG / (T1+T5)≦2.500, the preferred range is 0.400≦AAG / (T1+T5)≦2.500;

[0229] Condition (3): (T7+T8) / T6≦3.300, the preferred range is 1.200≦(T7+T8) / T6≦3.300;

[0230] Condition (4): (T4+G45+T5) / G34≧1.500, the preferred range is 6.200≧(T4+G45+T5) / G34≧1.500;

[0231] Condition (5): EFL / (T6+T7)≧3.900, the preferred range is 8.000≧EFL / (T6+T7)≧3.900;

[0232] Condition (6): TL / BFL≦5.500, the preferred range is 4.400≦TL / BFL≦5.500;

[0233] Condition (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;

[0234] Condition (8): (T3+G34) / (T2+G23)≦2.800, the preferred range is 1.600≦(T3+G34) / (T2+G23)≦2.800;

[0235] Condition (9): (T1+G12) / (T5+G56)≦2.200, the preferred range is 0.700≦(T1+G12) / (T5+G56)≦2.200;

[0236] Condition (10): T1 / T8 ≥ 1.200, the preferred range is 3.300 ≥ T1 / T8 ≥ 1.200;

[0237] Condition (11): TTL / ALT≦2.200, the preferred range is 1.300≦TTL / ALT≦2.200;

[0238] Condition (12): AAG / (G12+G34)≧2.000, the preferred range is 3.300≧AAG / (G12+G34)≧2.000;

[0239] Condition (13): T1 / (G12+T2)≧1.300, the preferred range is 2.800≧T1 / (G12+T2)≧1.300;

[0240] Condition (14): (T3+T5) / T4≧2.500, the preferred range is 7.000≧(T3+T5) / T4≧2.500;

[0241] Condition (15): (T6+T7) / T2≦3.800, the preferred range is 2.300≦(T6+T7) / T2≦3.800;

[0242] Condition (16): EFL / AAG≧2.200, the preferred range is 4.700≧EFL / AAG≧2.200;

[0243] Conditional expression (17): (G34+G45) / G23≦4.000, the preferred range is 1.600≦(G34+G45) / G23≦4.000;

[0244] Condition (18): (T1+T3) / G34≧1.500, the preferred range is 6.500≧(T1+T3) / G34≧1.500;

[0245] Condition (19): ALT / AAG≧1.600, with a preferred range of 4.700≧ALT / AAG≧1.600.

[0246] 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.

[0247] 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 red, green, and blue representative wavelengths 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 red, green, and blue representative wavelengths are also quite close, indicating that this invention exhibits excellent concentration of different wavelengths of light under various conditions and thus excellent dispersion suppression capabilities. Therefore, it is evident from the above that this invention possesses excellent optical performance.

[0248] 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.

[0249] 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 be construed as limiting 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 components are possible and do not depart from the spirit and scope of the present invention.

Claims

1. An optical imaging lens, comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, 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, characterized in that: The first lens has a positive refractive index or the eighth lens has a negative refractive index; A circumferential region on the image side of the first lens is concave. The second lens has a negative refractive index; At least three of the third, fifth, sixth, and seventh lenses have positive refractive indices; The fourth lens has a negative refractive index; The optical axis region on the image side of the sixth lens is concave; The optical imaging lens has only the eight lenses mentioned above, and The optical imaging lens satisfies the condition: (T7+T8) / T6≦3.300, 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, and T6 represents the thickness of the sixth lens on the optical axis.

2. The optical imaging lens according to claim 1, characterized in that, Where 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, 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. The optical imaging lens satisfies the condition: (T3+G34) / (T2+G23)≦2.

800.

3. The optical imaging lens according to claim 1, characterized in that, Where 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. The optical imaging lens satisfies the condition: AAG / (G12+G34)≧2.

000.

4. The optical imaging lens according to claim 1, characterized in that, Where 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. The optical imaging lens satisfies the condition: (T4+G45+T5) / G34≧1.

500.

5. The optical imaging lens according to claim 1, characterized in that, Where T1 represents the thickness of the first lens on the optical axis, T3 represents the thickness of the third lens on the optical axis, and G34 represents the distance from the image side of the third lens to the object side of the fourth lens on the optical axis. The optical imaging lens satisfies the condition: (T1+T3) / G34≧1.

500.

6. The optical imaging lens according to claim 1, characterized in that, Where ALT represents the total thickness of the eight lenses from the first lens to the eighth lens on the optical axis, T1 represents the thickness of the first 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.

7. An optical imaging lens, comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, 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, characterized in that: The first lens has a positive refractive index or the eighth lens has a negative refractive index; At least two of the second, third, fifth, and sixth lenses have positive refractive indices; The optical axis region on the image side of the third lens is concave; The fourth lens has a negative refractive index; The optical axis region on the image side of the sixth lens is concave; The seventh lens has a positive refractive index; The optical imaging lens has only the eight lenses mentioned above, and The optical imaging lens satisfies the condition: (G34+G45) / G23≦4.000, where 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.

8. The optical imaging lens according to claim 7, characterized in that, Where EFL represents the effective focal length of the optical imaging lens, T6 represents the thickness of the sixth lens on the optical axis, and 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.

9. The optical imaging lens according to claim 7, characterized in that, Where 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.

10. The optical imaging lens according to claim 7, characterized in that, Where 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, T8 represents the thickness of the eighth lens on the optical axis, T1 represents the thickness of the first lens on the optical axis, 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. The optical imaging lens satisfies the condition: (T6+G67+T7+G78+T8) / (T1+G12+T2)≦2.

200.

11. The optical imaging lens according to claim 7, characterized in that, Where T1 represents the thickness of the first lens on the optical axis, T8 represents the thickness of the eighth lens on the optical axis, and the optical imaging lens satisfies the condition: T1 / T8≧1.

200.

12. The optical imaging lens according to claim 1 or 7, characterized in that, Where 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.

13. The optical imaging lens according to claim 1 or 7, characterized in that, Where T1 represents the thickness of the first lens on the optical axis, G12 represents the 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 the distance on the optical axis from the image side of the fifth lens to the object side of the sixth lens. The optical imaging lens satisfies the condition: (T1+G12) / (T5+G56)≦2.

200.

14. The optical imaging lens according to claim 1 or 7, characterized in that, Where AAG represents the total width of the seven air gaps on the optical axis between the first lens and the eighth lens, T1 represents the thickness of the first lens on the optical axis, 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.

15. The optical imaging lens according to claim 1 or 7, characterized in that, Where EFL represents the effective focal length of the optical imaging lens, AAG represents the sum of the widths of the seven air gaps on the optical axis between the first lens and the eighth lens, and the optical imaging lens satisfies the condition: EFL / AAG≧2.

200.

16. The optical imaging lens according to claim 1 or 7, characterized in that, Where 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 and the eighth lens on the optical axis. The optical imaging lens satisfies the condition: ALT / AAG ≥ 1.

600.

17. The optical imaging lens according to claim 1 or 7, characterized in that, Where T1 represents the thickness of the first lens on the optical axis, 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. The optical imaging lens satisfies the condition: T1 / (G12+T2)≧1.

300.

18. The optical imaging lens according to claim 1 or 7, characterized in that, Where T3 represents the thickness of the third lens on the optical axis, T5 represents the thickness of the fifth lens on the optical axis, and T4 represents the thickness of the fourth lens on the optical axis, and the optical imaging lens satisfies the condition: (T3+T5) / T4≧2.

500.

19. The optical imaging lens according to claim 1 or 7, characterized in that, Where TL represents the distance on the optical axis from the object side of the first lens to the image side of the eighth lens, and BFL represents the distance on the optical axis from the image side of the eighth lens to an imaging surface. The optical imaging lens satisfies the condition: TL / BFL≦5.500.

Images