Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens sequentially comprises a first lens, a second lens and a third lens from an object side to an image side, by controlling the refractive index and parameters of the lens to meet the conditional expression, the optical imaging lens is light, thin, short and small in appearance and excellent in imaging quality.

Description

Technical Field

[0001] The present invention relates to an optical imaging lens, and in particular to an optical imaging lens used in portable electronic products. Background Art

[0002] Portable electronic products, such as mobile phones, cameras, tablets, personal digital assistants (PDAs), and head-mounted displays (AR, VR, and MR), are experiencing rapid advancements in specifications. Not only are they becoming thinner and smaller, but the specifications of key components like optical lenses are also constantly improving to meet consumer demands. Therefore, designing optical imaging lenses that are both thinner and smaller while still providing excellent image quality has become a challenging problem that needs to be solved. Summary of the Invention

[0003] One object of the present invention is to provide an optical imaging lens that is thin, light, and compact in appearance and has excellent imaging quality.

[0004] According to one embodiment of the present invention, an optical imaging lens is provided. The lens includes three lenses along an optical axis, from an object side to an image side. The lenses include, in order, a first lens, a second lens, and a third lens. Each of the first to third lenses includes an object-side surface facing the object side and transmitting imaging light, and an image-side surface facing the image side and transmitting imaging light.

[0005] In order to facilitate the expression of the parameters referred to in the present invention, the following definitions are given in this specification and the drawings: T1 represents the thickness of the first lens on the optical axis; G12 represents the distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens, that is, the air gap on the optical axis between the first lens and the second lens; T2 represents the thickness of the second lens on the optical axis; G23 represents the distance on the optical axis from the image side surface of the second lens to the object side surface of the third lens, that is, the air gap on the optical axis between the second lens and the third lens; T3 represents the thickness of the third lens on the optical axis; G3F represents the distance on the optical axis from the image side surface of the third lens to the object side surface of the filter; CF represents the thickness of the filter on the optical axis; GFP represents the distance on the optical axis from the image side surface of the filter to the imaging surface; CG is the cover glass (Cover Glass) on the optical axis; f1 represents the focal length of the first lens; f2 represents the focal length of the second lens; f3 represents the focal length of the third lens; n1 represents the refractive index of the first lens; n2 represents the refractive index of the second lens; n3 represents the refractive index of the third lens; V1 represents the Vd Abbe number of the first lens; V2 represents the Vd Abbe number of the second lens; V3 represents the Vd Abbe number of the third lens; EFL represents the effective focal length of the optical imaging lens; Tmax represents the maximum value of the three lens thicknesses of the first lens to the third lens on the optical axis, that is, the maximum value among T1, T2, and T3; Tmin represents the minimum value of the three lens thicknesses of the first lens to the third lens on the optical axis, that is, the minimum value among T1, T2, and T3; Tavg represents the average value of the three lens thicknesses of the first lens to the third lens on the optical axis, that is, the average value of T1, T2, and T3; Gmax is the average value of the three lens thicknesses of the first lens to the third lens on the optical axis. The maximum value of the two air gaps on the optical axis of the third lens, that is, the maximum value of G12 and G23; TL represents the distance on the optical axis from the object side of the first lens to the image side of the third lens; TTL represents the system length of the optical imaging lens, that is, the distance on the optical axis from the object side of the first lens to the imaging plane; ALT represents the sum of the thicknesses of the three lenses on the optical axis from the first lens to the third lens, that is, the sum of T1, T2, and T3; AAG represents the sum of the two air gaps on the optical axis from the first lens to the third lens, that is, the sum of G12 and G23; BFL represents the back focal length, that is, the distance on the optical axis from the image side of the third lens to the imaging plane, that is, the sum of G3F, CF, and GFP; HFOV represents the half field of view of the optical imaging lens; ImgH represents the image height of the optical imaging lens; Fno represents the aperture value of the optical imaging lens; EPD is the entrance pupil diameter of the optical imaging lens, which is equal to the ratio of the effective focal length to the aperture value.

[0006] According to one aspect of the present invention, an optical imaging lens is provided, wherein the refractive index of the first lens element is negative. The optical imaging lens comprises only the three lenses described above and satisfies the following conditions: (1) V1 + V2 + V3 ≤ 85.500, (2) TTL / AAG ≥ 2.700, and (3) Fno * ALT / BFL ≤ 4.800.

[0007] According to another aspect of the present invention, an optical imaging lens is provided, wherein the refractive index of the first lens element is negative, and an optical axis region of the image-side surface of the third lens element is convex. The optical imaging lens comprises only the aforementioned three lenses and satisfies conditions (1), (2), and (4): Fno*TTL / BFL≤9.000.

[0008] According to another aspect of the present invention, an optical imaging lens is provided, wherein the refractive index of the first lens is negative. The optical imaging lens comprises only the three lenses described above and satisfies conditions (1), (2), and (5): TTL / BFL ≤ 3.150.

[0009] Secondly, the present invention can selectively control the aforementioned parameters so that the optical imaging lens further satisfies at least one of the following conditions:

[0010] Fno*TL / BFL≤6.050 Conditional formula (6);

[0011] ALT / EPD ≥ 1.500 Conditional formula (7);

[0012] ALT / G23 ≥ 7.400 Condition (8);

[0013] BFL / AAG ≥ 1.250 Conditional formula (9);

[0014] (T1+T2) / G23≥4.750 Conditional formula (10);

[0015] BFL / Tmin≥2.400 Condition (11);

[0016] BFL / TL ≥ 0.450 Condition (12);

[0017] BFL / Tavg ≥ 1.750 Condition (13);

[0018] BFL / EFL ≥ 1.050 Condition (14);

[0019] BFL / ImgH ≥ 1.450 Conditional formula (15);

[0020] BFL / (EFL+ImgH)≥0.600 Conditional formula (16);

[0021] (TTL+ImgH) / BFL≤3.800 Conditional formula (17);

[0022] (TL+ImgH) / BFL≤2.800 Conditional formula (18);

[0023] (T2+T3) / G23≥4.900 Conditional formula (19);

[0024] EFL / EPD ≥ 1.550 Conditional formula (20);

[0025] BFL / G23≥10.500 Conditional formula (21);

[0026] G12 / G23 ≥ 2.350 Conditional formula (22).

[0027] The exemplary limiting conditions listed above may be selectively combined in varying numbers and applied to the embodiments of the present invention, and are not intended to be limiting. In implementing the present invention, in addition to the aforementioned conditional expressions, additional lens designs, including concave-convex surface arrangements, refractive index variations, various material choices, or other detailed structures, may be employed for a single lens or across multiple lenses to enhance control over system performance and / or resolution. It should be noted that these details may be selectively combined and applied to other embodiments of the present invention without conflict.

[0028] From the above, it can be seen that the optical imaging lens of the present invention can have a light, thin and compact appearance and excellent imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram showing the cross-sectional structure of a lens according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram showing the relationship between lens surface shape and light focus;

[0031] Figure 3 Draw a diagram showing the relationship between the surface shape and the area boundaries of the lens area in Example 1;

[0032] Figure 4 Draw a diagram showing the relationship between the surface shape and the area boundaries of the lens area in Example 2;

[0033] Figure 5 Draw a diagram showing the relationship between the surface shape and the area boundaries of the lens area in Example 3;

[0034] Figure 6 A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to a first embodiment of the present invention;

[0035] Figure 7A 、7B 7C and 7D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the first embodiment of the present invention;

[0036] Figure 8 Displays detailed optical data of each lens of the optical imaging lens according to the first embodiment of the present invention;

[0037] Figure 9 Displays aspherical surface data of the optical imaging lens according to the first embodiment of the present invention;

[0038] Figure 10 A schematic cross-sectional view of a three-lens optical imaging lens system according to a second embodiment of the present invention is shown;

[0039] Figure 11A 、 11B 11C and 11D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the second embodiment of the present invention;

[0040] Figure 12 Displays detailed optical data of each lens of the optical imaging lens according to the second embodiment of the present invention;

[0041] Figure 13 Displays aspherical surface data of the optical imaging lens according to the second embodiment of the present invention;

[0042] Figure 14 A schematic cross-sectional view of a three-lens optical imaging lens system according to a third embodiment of the present invention is shown;

[0043] Figure 15A 、 15B 15C and 15D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the third embodiment of the present invention;

[0044] Figure 16 Displays detailed optical data of each lens of the optical imaging lens according to the third embodiment of the present invention;

[0045] Figure 17 Displays aspherical surface data of the optical imaging lens according to the third embodiment of the present invention;

[0046] Figure 18 A schematic cross-sectional view of a three-lens optical imaging lens system according to a fourth embodiment of the present invention is shown;

[0047] Figure 19A 、 19B 19C and 19D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fourth embodiment of the present invention;

[0048] Figure 20 Displays detailed optical data of each lens of the optical imaging lens according to the fourth embodiment of the present invention;

[0049] Figure 21 Displays aspherical surface data of the optical imaging lens according to the fourth embodiment of the present invention;

[0050] Figure 22 A schematic cross-sectional view of a three-lens optical imaging lens system according to a fifth embodiment of the present invention is shown;

[0051] Figure 23A 、 23B 23C and 23D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fifth embodiment of the present invention;

[0052] Figure 24 Displays detailed optical data of each lens of the optical imaging lens according to the fifth embodiment of the present invention;

[0053] Figure 25 Displays aspherical surface data of the optical imaging lens according to the fifth embodiment of the present invention;

[0054] Figure 26 A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to a sixth embodiment of the present invention;

[0055] Figure 27A 、 27B 27C and 27D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the sixth embodiment of the present invention;

[0056] Figure 28 Displays detailed optical data of each lens of the optical imaging lens according to the sixth embodiment of the present invention;

[0057] Figure 29 Displays aspherical surface data of the optical imaging lens according to the sixth embodiment of the present invention;

[0058] Figure 30 A schematic cross-sectional view of a three-lens optical imaging lens system according to a seventh embodiment of the present invention is shown;

[0059] Figure 31A 、 31B 31C and 31D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the seventh embodiment of the present invention;

[0060] Figure 32 Displays detailed optical data of each lens of the optical imaging lens according to the seventh embodiment of the present invention;

[0061] Figure 33Displays aspherical surface data of the optical imaging lens according to the seventh embodiment of the present invention;

[0062] Figure 34 A schematic cross-sectional view of a three-piece lens system of an optical imaging lens according to an eighth embodiment of the present invention is shown;

[0063] Figure 35A 、 35B 35C and 35D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eighth embodiment of the present invention;

[0064] Figure 36 Displays detailed optical data of each lens of the optical imaging lens according to the eighth embodiment of the present invention;

[0065] Figure 37 Displays aspherical surface data of the optical imaging lens according to the eighth embodiment of the present invention;

[0066] Figure 38 A schematic cross-sectional view of a three-lens optical imaging lens system according to a ninth embodiment of the present invention is shown;

[0067] Figure 39A 、 39B 39C and 39D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the ninth embodiment of the present invention;

[0068] Figure 40 Displays detailed optical data of each lens of the optical imaging lens according to the ninth embodiment of the present invention;

[0069] Figure 41 Displays aspherical surface data of the optical imaging lens according to the ninth embodiment of the present invention;

[0070] Figure 42 A schematic cross-sectional view of a three-piece lens system of a tenth embodiment of the optical imaging lens system according to the present invention is shown;

[0071] Figure 43A 、 43B 43C and 43D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the tenth embodiment of the present invention;

[0072] Figure 44 Displays detailed optical data of each lens of the optical imaging lens according to the tenth embodiment of the present invention;

[0073] Figure 45 Displays aspherical surface data of the optical imaging lens according to the tenth embodiment of the present invention;

[0074] Figure 46A schematic cross-sectional view of a three-lens optical imaging lens according to an eleventh embodiment of the present invention is shown;

[0075] Figure 47A 、 47B 47C and 47D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eleventh embodiment of the present invention;

[0076] Figure 48 Displays detailed optical data of each lens of the optical imaging lens according to the eleventh embodiment of the present invention;

[0077] Figure 49 Displays aspherical surface data of the optical imaging lens according to the eleventh embodiment of the present invention;

[0078] Figure 50 A schematic cross-sectional view of a three-lens optical imaging lens system according to a twelfth embodiment of the present invention is shown;

[0079] Figure 51A 、 51B 51C and 51D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the twelfth embodiment of the present invention;

[0080] Figure 52 Displays detailed optical data of each lens of the optical imaging lens according to the twelfth embodiment of the present invention;

[0081] Figure 53 Displays aspherical surface data of the optical imaging lens according to the twelfth embodiment of the present invention;

[0082] Figure 54A 、 54B A comparison table of the numerical values ​​of the parameter combinations of the above twelve embodiments is listed below.

[0083] Description of reference numerals:

[0084] 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12: optical imaging lens;

[0085] 100, 200, 300, 400, 500: lens;

[0086] 130: Assembly Department;

[0087] 211, 212: parallel light;

[0088] STO: aperture;

[0089] L1: first lens; L2: second lens; L3: third lens;

[0090] TF: filter; CG: protective glass;

[0091] IMA: imaging area;

[0092] 110, 410, 510, L1A1, L2A1, L3A1, TFA1, CGA1: object side;

[0093] 120, 320, L1A2, L2A2, L3A2, TFA2, CGA2: image side view;

[0094] Z1, L1A1C, L1A2C, L2A1C, L2A2C, L3A1C, L3A2C: optical axis area;

[0095] Z2, L1A1P, L1A2P, L2A1P, L2A2P, L3A1P, L3A2P: circumferential zone;

[0096] A1: object side; A2: image side; CP: center point;

[0097] CP1: first center point; CP2: second center point;

[0098] TP1: first transition point; TP2: second transition point;

[0099] OB: optical boundary; I: optical axis; Lc: chief ray; Lm: marginal ray;

[0100] EL: extension line; Z3: relay zone; M, R: intersection point. DETAILED DESCRIPTION

[0101] To further illustrate various embodiments, the present invention provides drawings. These drawings form part of the disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of the present invention. Elements in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar elements.

[0102] The terms "optical axis region", "circumferential region", "concave surface" and "convex surface" used in this specification and the claims should be interpreted based on the definitions listed in this specification.

[0103] The optical system of this specification includes at least one lens, which receives the imaging light of the incident optical system that is parallel to the optical axis and within the half field of view (HFOV) angle relative to the optical axis. The imaging light is imaged on the imaging surface through the optical system. The so-called "a lens has a positive refractive power (or negative refractive power)" means that the paraxial refractive power of the lens calculated by Gaussian optical theory is positive (or negative). The so-called "object side (or image side) of the lens" is defined as the specific range where the imaging light passes through the lens surface. The imaging light includes at least two types of light: the chief ray Lc and the marginal ray Lm (such as Figure 1 The object side (or image side) of the lens can be divided into different regions based on different positions, including an optical axis region, a circumferential region, or one or more intermediate regions in some embodiments. These regions will be described in detail below.

[0104] Figure 1 is a radial cross-sectional view of the lens 100. Two reference points on the surface of the lens 100 are defined: the center point and the transition point. The center point of the lens surface is an intersection of the surface and the optical axis I. Figure 1 As shown in the example, the first center point CP1 is located on the object side surface 110 of the lens 100, and the second center point CP2 is located on the image side surface 120 of the lens 100. A conversion point is a point on the lens surface, and the tangent of the point is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All conversion points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the surface of the lens 100 may have no conversion points or at least one conversion point. If a single lens surface has multiple conversion points, the conversion points are named in order from the first conversion point in the radial outward direction. For example, the first conversion point TP1 (closest to the optical axis I), the second conversion point TP2 (such as Figure 4 as shown) and the Nth conversion point (farthest from the optical axis I).

[0105] When the lens surface has at least one transition point, the range from the center point to the first transition point TP1 is defined as the optical axis area, wherein the optical axis area includes the center point. The area radially outward from the transition point farthest from the optical axis I (the Nth transition point) to the optical boundary OB is defined as the circumferential area. In some embodiments, a relay area between the optical axis area and the circumferential area may be included, and the number of relay areas depends on the number of transition points. When the lens surface does not have a transition point, 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis area, and 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential area.

[0106] When a light ray parallel to the optical axis I passes through an area, if the ray is deflected toward the optical axis I and its intersection with the optical axis I is located on the image side A2 of the lens, the area is convex. When a light ray parallel to the optical axis I passes through an area, if the extension of the ray intersects the optical axis I on the object side A1 of the lens, the area is concave.

[0107] In addition, see Figure 1 Lens 100 may also include an assembly portion 130 extending radially outward from optical boundary OB. Assembly portion 130 is generally used to assemble lens 100 to a corresponding element in an optical system (not shown). Imaging light does not reach assembly portion 130. The structure and shape of assembly portion 130 are merely illustrative of the present invention and do not limit the scope of the present invention. Assembly portion 130 of the lens discussed below may be partially or entirely omitted from the drawings.

[0108] See also Figure 2 , define the area between the center point CP and the first transition point TP1 as the optical axis area Z1. Define the area between the first transition point TP1 and the optical boundary OB of the lens surface as the circumferential area Z2. Figure 2 As shown, after passing through the optical axis region Z1, the parallel light 211 intersects the optical axis I at the image side A2 of the lens 200. That is, the focus of the parallel light 211 passing through the optical axis region Z1 is located at point R on the image side A2 of the lens 200. Since the light intersects the optical axis I at the image side A2 of the lens 200, the optical axis region Z1 is a convex surface. Conversely, the parallel light 212 diverges after passing through the circumferential region Z2. Figure 2 As shown, the extended line EL of the parallel light 212 after passing through the circumferential area Z2 intersects the optical axis I at the object side A1 of the lens 200, that is, the focus of the parallel light 212 passing through the circumferential area Z2 is located at point M on the object side A1 of the lens 200. Since the extended line EL of the light intersects the optical axis I at the object side A1 of the lens 200, the circumferential area Z2 is a concave surface. Figure 2 In the lens 200 shown, the first transition point TP1 is the boundary between the optical axis area and the circumferential area, that is, the first transition point TP1 is the boundary point from the convex surface to the concave surface.

[0109] Alternatively, the surface convexity of the optical axis region can be determined using a method commonly used by those skilled in the art. This involves determining the convexity of the lens' optical axis region based on the sign of the paraxial radius of curvature (abbreviated as the R value). R values ​​are commonly used in optical design software such as Zemax or CodeV. R values ​​are also commonly found in lens data sheets within optical design software. Regarding the object side, a positive R value indicates that the optical axis region on the object side is convex; a negative R value indicates that the optical axis region on the object side is concave. Conversely, regarding the image side, a positive R value indicates that the optical axis region on the image side is concave; a negative R value indicates that the optical axis region on the image side is convex. The results of this method are consistent with the previously described method of determining the convexity based on the intersection of a ray / ray extension line with the optical axis. This method determines the convexity of the surface based on the focus of a ray parallel to the optical axis on either the object or image side of the lens. The terms “a region is convex (or concave)”, “a region is convex (or concave)” or “a convex (or concave) region” described in this specification can be used interchangeably.

[0110] Figures 3 to 5 Examples are provided for determining the surface shape and area boundaries of lens areas in various situations, including the aforementioned optical axis area, circumferential area, and relay area.

[0111] Figure 3 is a radial cross-sectional view of the lens 300. Figure 3 , the image side surface 320 of the lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis area Z1 and the circumferential area Z2 of the image side surface 320 of the lens 300 are as follows: Figure 3 The R value of the image-side surface 320 is positive (ie, R>0), and therefore, the optical axis region Z1 is a concave surface.

[0112] Generally speaking, the shape of each area bounded by a transition point is opposite to that of the adjacent areas. Therefore, the transition point can be used to define the transition of the surface shape, that is, from concave to convex or from convex to concave. Figure 3 In the figure, since the optical axis area Z1 is a concave surface, the surface shape changes at the transition point TP1, so the circumferential area Z2 is a convex surface.

[0113] Figure 4 is a radial cross-sectional view of the lens 400. Figure 4 The object-side surface 410 of the lens 400 has a first transition point TP1 and a second transition point TP2. The area between the optical axis I and the first transition point TP1 is defined as the optical axis region Z1 of the object-side surface 410. The R value of the object-side surface 410 is positive (i.e., R>0), and therefore, the optical axis region Z1 is convex.

[0114] The area between the second transition point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 is defined as a circumferential area Z2. The circumferential area Z2 of the object side surface 410 is also convex. In addition, the area between the first transition point TP1 and the second transition point TP2 is defined as a relay area Z3. The relay area Z3 of the object side surface 410 is concave. Figure 4 The object-side surface 410 includes, radially outward from the optical axis I, an optical axis region Z1 between the optical axis I and a first turning point TP1, an intermediate region Z3 between the first turning point TP1 and a second turning point TP2, and a circumferential region Z2 between the second turning 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, the surface shape changes from the first turning point TP1 to concave, resulting in the intermediate region Z3 being concave. Since the surface shape changes again from the second turning point TP2 to convex, the circumferential region Z2 is convex.

[0115] Figure 5 is a radial cross-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 area 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 area is defined as 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface. Figure 5 In the illustrated lens 500, the optical axis region Z1 of the object-side surface 510 is defined as the distance from the optical axis I to 50% of the distance from the optical axis I to the optical boundary OB of the lens 500 surface. The R value of the object-side surface 510 is positive (i.e., R>0), and therefore, the optical axis region Z1 is convex. Because the object-side surface 510 of the lens 500 lacks a transition point, the circumferential region Z2 of the object-side surface 510 is also convex. The lens 500 may further include an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0116] The optical imaging lens of the present invention comprises three lenses arranged along an optical axis from an object side to an image side, comprising, in order, a first lens, a second lens, and a third lens. Each of the first through third lenses includes an object-side surface facing the object side and transmitting imaging light, and an image-side surface facing the image side and transmitting imaging light. By carefully designing the detailed features of each lens and ensuring that parameter combinations fall within a specific range, the optical imaging lens of the present invention achieves a slim, lightweight design and excellent imaging quality.

[0117] The characteristics of the aforementioned lenses designed herein are primarily considered in light of the optical characteristics and system length of the optical imaging lens. The optical imaging lens of the present invention utilizes materials with a high nd refractive index and a low Vd Abbe number, and satisfies V1+V2+V3≤85.500. This facilitates light deflection and reduces the length of the lens system. Furthermore, a system length and air gap ratio of TTL / AAG≥2.700 is configured to achieve superior imaging quality while saving space. Combined with the negative refractive power adjustment of the first lens, aberrations in the central field of view of the imaging plane can be further corrected. If the following conditions are met:

[0118] (1) The ratio of Fno*ALT / BFL≤4.800 is limited. In combination with the lens thickness design and a smaller aperture value, the luminous flux can be increased. The back focal length that is relatively large relative to the system length helps to reduce the incident angle of the main ray and reduce the distortion and aberration of the edge field of view.

[0119] (2) The ratio of Fno*TTL / BFL≤9.000 is limited. When the back focal length accounts for a relatively large proportion of the overall system length, combined with a smaller aperture value, the incident angle of the main ray can be reduced, thereby reducing the distortion and aberration of the peripheral field of view while increasing the light flux.

[0120] (3) The TTL / BFL ratio limit of 3.150 can effectively reduce the distortion and aberration of the edge field of view when the back focal length accounts for a relatively large proportion and the overall system length is matched.

[0121] When the conditional expression satisfies the optimal ratio limit of Fno*TTL / BFL≤8.000, distortion aberration can be further reduced or light flux can be increased, thereby improving image quality.

[0122] When the system length and air gap of the invention meet the preferred range of TTL / AAG≥3.000, while maintaining a small system length, the air gap between lenses can be further reduced to avoid additional aberrations and improve imaging quality.

[0123] To achieve optimal image quality while reducing system length and minimizing distortion and aberrations at the edges of the field of view, in addition to balancing the relationship between back focal length and image height, or between system length and focal length, adjustments must also be made to the thickness of each lens and the air gap within the system. Meeting the numerical limits of the following conditional equations allows for optimal configuration of the embodiments of the present invention, improving aberrations and distortion within the optical imaging lens. When these limits are met, spherical aberration can be further improved.

[0124] Conditional expression: Optimal range: BFL / AAG≥1.250 1.250≦BFL / AAG≦11.200 Fno*TL / BFL≤6.050 1.300≦Fno*TL / BFL≦6.050 BFL / Tmin≥2.400 2.400≦BFL / Tmin≦10.100 BFL / TL≥0.450 0.450≦BFL / TL≦2.100 BFL / Tavg≥1.750 1.750≦BFL / Tavg≦8.900 BFL / EFL≥1.050 1.050≦BFL / EFL≦2.400 BFL / ImgH≥1.450 1.450≦BFL / ImgH≦3.000 BFL / (EFL+ImgH)≥0.600 0.600≦BFL / (EFL+ImgH)≦1.300 (TTL+ImgH) / BFL≤3.800 1.800≦(TTL+ImgH) / BFL≦3.800 (TL+ImgH) / BFL≤2.800 0.800≦(TL+ImgH) / BFL≦2.800 BFL / G23≥10.500 10.500≦BFL / G23≦37.800

[0125] To shorten the lens system length and ensure image quality while also considering manufacturing complexity, the air gap between lenses can be reduced, the ratio of lens thickness to air gap can be adjusted, and even the distance between the lens group and the imaging plane can be adjusted to achieve this goal. Meeting the numerical limits of the following conditional expression allows for optimal configuration of the embodiments of the present invention, improving aberrations and distortion of the optical imaging lens. When meeting the optimal range, spherical aberration can be further improved.

[0126]

[0127]

[0128] To achieve optimal imaging quality while reducing system length and simultaneously minimizing distortion and aberration, the optical imaging lens of the present invention further adjusts the ratio of lens thickness or system focal length to entrance pupil diameter. Meeting the numerical limits of the following conditional equation allows for optimal configuration of the embodiments of the present invention, improving aberrations and distortion of the optical imaging lens. When these values ​​meet the optimal range, spherical aberration can be further improved.

[0129] Conditional expression: Optimal range: ALT / EPD≥1.500 1.500≦ALT / EPD≦5.300 EFL / EPD≥1.550 1.550≦EFL / EPD≦4.300

[0130] In addition, any combination of parameters of the embodiment can be selected to increase lens restrictions, so as to facilitate the design of lenses with the same structure of the present invention.

[0131] Given the unpredictability of optical system design, the present invention's architecture, by meeting the aforementioned conditions, can effectively shorten the system length, reduce the aperture value, improve image quality, or increase assembly yield, thereby overcoming the shortcomings of prior art. Furthermore, the use of plastic materials in the lens embodiments of the present invention further reduces lens weight and saves costs.

[0132] In addition to the aforementioned conditional expressions, when implementing the present invention, additional lens designs, such as those described in the following embodiments, including concave-convex surface arrangements, refractive index variations, or other details or additional structures, can be designed for a single lens or more broadly across multiple lenses to enhance control over system volume, performance, and resolution, and / or improve manufacturing yield. Furthermore, regarding material design, all lenses in the optical imaging lens of the present embodiment are constructed of plastic to reduce weight and cost. However, lenses made of various transparent materials, such as glass and resin, may also be used. It should be noted that these details may be selectively combined and applied to other embodiments of the present invention, provided they do not conflict, and are not intended to be limiting.

[0133] In order to illustrate that the present invention can indeed provide good optical performance while increasing the field of view and reducing the aperture value, the following provides several examples and their detailed optical data. Figures 6 to 9 ,in Figure 6A schematic diagram showing the cross-sectional structure of a three-piece lens of the optical imaging lens according to the first embodiment of the present invention is shown. Figure 7A 、 7B 7C and 7D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the first embodiment of the present invention. Figure 8 Displays detailed optical data of the optical imaging lens according to the first embodiment of the present invention. Figure 9 The aspheric surface data of each lens of the optical imaging lens according to the first embodiment of the present invention are shown.

[0134] like Figure 6 As shown, the optical imaging lens 1 of this embodiment includes, from object side A1 to image side A2, a first lens L1, an aperture stop STO, a second lens L2, and a third lens L3. A filter TF, a cover glass CG, and the imaging surface IMA of the image sensor are all disposed on the image side A2 of the optical imaging lens 1. In this embodiment, the filter TF is disposed between the third lens L3 and the imaging surface IMA. Depending on actual needs, a filter that filters out specific wavelengths can be selected to prevent light of certain wavelengths from passing through the imaging surface IMA and affecting image quality. In this example, the optical imaging lens 1 is an infrared imaging lens, so the filter TF is used to filter out visible light, preventing wavelengths in the visible range from being imaged on the imaging surface IMA, but this is not a limitation.

[0135] The first lens L1 , the second lens L2 , and the third lens L3 of the optical imaging lens system 1 are exemplarily made of plastic material, but are not limited thereto and may also be made of other transparent materials such as glass or resin.

[0136] The detailed structure of the first lens element L1, the second lens element L2, and the third lens element L3 is as follows: First lens element L1 has a negative refractive power and has an object-side surface L1A1 facing the object side A1 and an image-side surface L1A2 facing the image side A2. Object-side surface L1A1 has a convex surface in its optical axis region L1A1C and a convex surface in its peripheral region L1A1P. Image-side surface L1A2 has a concave surface in its optical axis region L1A2C and a concave surface in its peripheral region L1A2P.

[0137] Second lens element L2 has positive refractive power and includes an object-side surface L2A1 facing object side A1 and an image-side surface L2A2 facing image side A2. Object-side surface L2A1 has a convex surface in its optical axis region L2A1C and a convex surface in its circumference region L2A1P. Image-side surface L2A2 has a convex surface in its optical axis region L2A2C and a convex surface in its circumference region L2A2P.

[0138] The third lens element L3 has positive refractive power and includes an object-side surface L3A1 facing the object side A1 and an image-side surface L3A2 facing the image side A2. Object-side surface L3A1 has a concave surface in its optical axis region L3A1C and a concave surface in its circumference region L3A1P. Image-side surface L3A2 has a convex surface in its optical axis region L3A2C and a convex surface in its circumference region L3A2P.

[0139] In this embodiment, air gaps are designed to exist between each of the lenses L1, L2, L3, the filter TF, the cover glass CG, and the imaging surface IMA of the image sensor. However, this is not limiting. In other embodiments, the surface profiles of any two opposing lenses may be designed to correspond to each other so that they can be bonded together to eliminate the air gaps therebetween.

[0140] For the optical characteristics and distance values ​​of each lens in the optical imaging lens 1 of this embodiment, please refer to Figure 8 , it can be seen that the effective focal length (EFL) of the optical imaging lens 1 of this embodiment is 0.556 mm (Millimiter, mm), the half field of view (HFOV) is 51.478 degrees, the aperture value (F-number, Fno) is 2.500, the image height is 0.408 mm, and the system length (TTL) is 1.860 mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54A Please note that the material parameters of the lenses disclosed in the optical parameter tables of each embodiment are in the format of the nd refractive index and Vd Abbe number of the International Glass Code, so that those skilled in the art can understand the specific material implementation. Among them, nd is the refractive index of the material at the d helium yellow line of 587.56 nm, and Vd is calculated based on the refractive index of the material at the d, F, and C wavelengths of the Fraunhofer spectrum. The focal length values ​​disclosed in the optical parameter tables of each embodiment are calculated based on the refractive index of the wavelength band implemented by the optical system. The primary wavelength (primary wavelength) implemented in the embodiment of the present invention is 940 nm, so the focal length value of the present invention is calculated based on the refractive index of the material at 940 nm.

[0141] The six aspheric surfaces (object-side surface L1A1 and image-side surface L1A2 of the first lens L1, object-side surface L2A1 and image-side surface L2A2 of the second lens L2, and object-side surface L3A1 and image-side surface L3A2 of the third lens L3) are defined by the following aspheric curve formula:

[0142]

[0143] Y represents the vertical distance between a point on the aspheric surface and the optical axis I; Z represents the depth of the aspheric surface (the vertical distance between a point on the aspheric surface that is Y away from the optical axis and the tangent plane on the vertex of the aspheric surface); R represents the radius of curvature of the lens surface near the optical axis; K is the conic constant; a i is the i-th order aspheric coefficient. Please refer to the detailed data of the parameters of each aspheric surface. Figure 9 , and please note that all unlisted values ​​are zero.

[0144] Figure 7A A schematic diagram illustrating longitudinal spherical aberration of this embodiment is shown, where the horizontal axis represents longitudinal spherical aberration and the vertical axis represents field of view. Figure 7B A schematic diagram illustrating the field curvature aberration in the sagittal direction of this embodiment is shown. Figure 7C A schematic diagram illustrating the field curvature aberration in the tangential direction of this embodiment is shown, where the horizontal axis represents the field curvature aberration and the vertical axis represents the image height. Figure 7D A diagram depicting the distortion of this embodiment is shown, with the horizontal axis representing percentage and the vertical axis representing image height. Off-axis light rays at three representative wavelengths (930nm, 940nm, and 950nm) at different heights are all concentrated near the image point. The deviation of each curve indicates that the image point deviation for off-axis light rays at different heights is controlled within a range of -0.006 to -0.003mm, significantly improving spherical aberration at different wavelengths. Sagittal field curvature is within a range of -9.00 to -1.00μm, and tangential field curvature is within a range of -6.00 to 4.00μm. Distortion is maintained within a range of -45% to 0%.

[0145] The above data demonstrates that the various optical properties of the optical imaging lens 1 meet the imaging quality requirements of the optical system. This demonstrates that the optical imaging lens 1 of this first preferred embodiment, compared to conventional optical lenses, can effectively provide better imaging quality while maintaining a system length of 1.860 mm.

[0146] refer to Figures 10 to 13 , Figure 10 A schematic cross-sectional view of a three-piece lens system of an optical imaging lens according to a second embodiment of the present invention is shown. Figure 11A 、 11B 11C and 11D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the second embodiment of the present invention. Figure 12 Displays detailed optical data of the optical imaging lens according to the second embodiment of the present invention. Figure 13 The aspheric surface data of each lens of the optical imaging lens according to the second embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 10 As shown in , the optical imaging lens system 2 of this embodiment includes, from the object side A1 to the image side A2 , a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 .

[0147] The concave-convex configuration of the object-side surface L1A1, L2A1, L3A1 facing the object side A1 and the image-side surface L1A2, L2A2, L3A2 facing the image side A2 of the second embodiment and the positive and negative refractive power configuration of each lens are substantially similar to those of the first embodiment, except that the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters of the second embodiment are different from those of the first embodiment. In this embodiment and each of the following embodiments, only the optical axis area and the circumferential area where the concave-convex configuration of the lens surface is different from that of the first embodiment are marked, and the numbers of the same parts are omitted and will not be repeated. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 2 of this embodiment, please refer to Figure 12 , it can be seen that the EFL of the optical imaging lens 2 of this embodiment is 0.558mm, HFOV is 51.478 degrees, Fno is 2.896, image height is 0.409mm, and TTL is 1.867mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54A .

[0148] from Figure 11A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.006 to 0.003 mm, as can be seen from the deflection amplitude of each curve. Figure 11B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within -8.00~1.00μm. Figure 11C Among the field curvature aberrations in the meridional direction, the focal length variation of the three representative wavelengths within the entire field of view falls within the range of -6.00 to 4.00 μm. Figure 11D The distortion aberration of the optical imaging lens 2 is maintained within the range of -45% to 0%. Compared with the first embodiment, the present embodiment exhibits a smaller field curvature aberration in the sagittal direction.

[0149] The above data shows that the various optical properties of the optical imaging lens 2 meet the imaging quality requirements of the optical system. This shows that the optical imaging lens 2 of this embodiment can effectively provide better imaging quality while providing a system length of 1.867 mm compared to conventional optical lenses.

[0150] refer to Figures 14 to 17 , Figure 14 A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to a third embodiment of the present invention is shown. Figure 15A 、 15B 15C and 15D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the third embodiment of the present invention. Figure 16 Displays detailed optical data of the optical imaging lens according to the third embodiment of the present invention. Figure 17 The aspheric surface data of each lens of the optical imaging lens according to the third embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 14 As shown in , the optical imaging lens 3 of this embodiment includes, from the object side A1 to the image side A2 , a first lens L1 , a second lens L2 , an aperture STO and a third lens L3 .

[0151] The concave-convex configuration of the object-side surfaces L1A1, L2A1, L3A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L3A22 facing the image side A2 of the third embodiment, as well as the positive and negative refractive power configuration of each lens element other than the third lens element L3, are substantially similar to those of the first embodiment. However, the third embodiment differs from the first embodiment in terms of the optical parameters such as the curvature radius, lens thickness, aspheric coefficient, back focal length, and the negative refractive power of the third lens element L3. For the optical characteristics and distance values ​​of each lens element of the optical imaging lens 3 of this embodiment, please refer to Figure 16 , it can be seen that the EFL of the optical imaging lens 3 of this embodiment is 0.554mm, HFOV is 51.478 degrees, Fno is 3.153, image height is 0.442mm, and TTL is 1.707mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54A .

[0152] from Figure 15A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.006 to 0.003 mm, as can be seen from the deflection amplitude of each curve. Figure 15B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within -10.00 to -1.00μm. Figure 15C Among the field curvature aberrations in the tangential direction, the focal length variation of the three representative wavelengths within the entire field of view falls within the range of -6.00 to 3.00 μm. Figure 15D The display distortion aberration is maintained within the range of -40% to 0%. Compared with the first embodiment, the field curvature aberration and distortion aberration in the sagittal direction of the display of this embodiment are smaller.

[0153] The above data demonstrates that the various optical properties of the optical imaging lens 3 meet the imaging quality requirements of the optical system. This demonstrates that, compared to existing optical lenses, the optical imaging lens 3 of this embodiment can effectively provide superior imaging quality while offering a system length of 1.707 mm. Compared to the first embodiment, the system length of this embodiment is shorter, further contributing to a slimmer and more compact design.

[0154] refer to Figures 18 to 21 , Figure 18A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to a fourth embodiment of the present invention is shown. Figure 19A 、 19B 19C and 19D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fourth embodiment of the present invention. Figure 20 Displays detailed optical data of the optical imaging lens according to the fourth embodiment of the present invention. Figure 21 The aspheric surface data of each lens of the optical imaging lens according to the fourth embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 18 As shown in , the optical imaging lens system 4 of this embodiment includes a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 in sequence from the object side A1 to the image side A2 .

[0155] The surface concave-convex configuration of the object-side surfaces L1A1, L2A1, L3A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L3A2 facing the image side A2 of the fourth embodiment, as well as the positive and negative refractive power configuration of each lens, are generally similar to those of the first embodiment. However, the fourth embodiment differs from the first embodiment in optical parameters such as the curvature radius, lens thickness, aspheric coefficient, and back focal length. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 4 of this embodiment, please refer to Figure 20 , it can be seen that the EFL of the optical imaging lens 4 of this embodiment is 0.514mm, HFOV is 51.478 degrees, Fno is 2.178, image height is 0.440mm, and TTL is 2.199mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54A .

[0156] from Figure 19A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.012 to 0.008 mm, as can be seen from the deflection amplitude of each curve. Figure 19B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within the range of -0.02 to 0.01mm. Figure 19C Among the field curvature aberrations in the tangential direction, the focal length changes of the three representative wavelengths within the entire field of view fall within the range of -0.04 to 0.06 mm. Figure 19D The display distortion aberration is maintained within the range of -35% to 0%. Compared with the first embodiment, the display distortion aberration of this embodiment is smaller.

[0157] The above data show that the various optical properties of the optical imaging lens 4 meet the imaging quality requirements of the optical system. This shows that the optical imaging lens 4 of this embodiment can effectively provide better imaging quality while providing a system length of 2.199 mm compared to conventional optical lenses.

[0158] refer to Figures 22 to 25 , Figure 22 A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to a fifth embodiment of the present invention is shown. Figure 23A 、 23B 23C and 23D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fifth embodiment of the present invention. Figure 24 Displays detailed optical data of the optical imaging lens according to the fifth embodiment of the present invention. Figure 25 The aspheric surface data of each lens of the optical imaging lens according to the fifth embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 22 As shown in , the optical imaging lens 5 of this embodiment includes a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 in order from the object side A1 to the image side A2 .

[0159] The concave-convex configuration of the object-side surfaces L1A1, L2A1, L3A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L3A2 facing the image side A2 of the fifth embodiment, as well as the positive and negative refractive power configuration of each lens element except the third lens element L3, are substantially similar to those of the first embodiment. However, the optical parameters such as the curvature radius, lens thickness, aspheric coefficient, back focal length, and the negative refractive power of the third lens element L3 of the fifth embodiment differ from those of the first embodiment. For the optical characteristics and distance values ​​of each lens element of the optical imaging lens 5 of this embodiment, please refer to Figure 24 , it can be seen that the EFL of the optical imaging lens 5 of this embodiment is 0.607mm, HFOV is 51.478 degrees, Fno is 2.079, image height is 0.483mm, and TTL is 1.760mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54A .

[0160] from Figure 23A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.004 to 0.0035 mm, as can be seen from the deflection amplitude of each curve. Figure 23B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within the range of -0.025 to 0.00mm. Figure 23C Among the field curvature aberrations in the meridional direction, the focal length changes of the three representative wavelengths within the entire field of view fall within the range of -0.01 to 0.005 mm. Figure 23D The display distortion aberration is maintained within the range of -40% to 0%. Compared with the first embodiment, the longitudinal spherical aberration and distortion aberration of the display in this embodiment are smaller.

[0161] The above data demonstrates that the various optical properties of the optical imaging lens 5 meet the imaging quality requirements of the optical system. This demonstrates that, compared to conventional optical lenses, the optical imaging lens 5 of this embodiment can effectively provide superior imaging quality while offering a system length of 1.760 mm. Compared to the first embodiment, the system length of this embodiment is shorter, further contributing to a slimmer and more compact design.

[0162] refer to Figures 26 to 29 , Figure 26 A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to a sixth embodiment of the present invention is shown. Figure 27A 、 27B 27C and 27D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the sixth embodiment of the present invention. Figure 28 Displays detailed optical data of the optical imaging lens according to the sixth embodiment of the present invention. Figure 29 The aspheric surface data of each lens of the optical imaging lens according to the sixth embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 26 As shown in FIG, the optical imaging lens system 6 of this embodiment includes a first lens L1, an aperture STO, a second lens L2, and a third lens L3 in sequence from the object side A1 to the image side A2.

[0163] The concave-convex configuration of the object-side surfaces L1A1, L2A1, L3A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L3A2 facing the image side A2 of the sixth embodiment, as well as the positive and negative refractive power configuration of each lens element except the third lens element L3, are generally similar to those of the first embodiment. However, the optical parameters such as the curvature radius, lens thickness, aspheric coefficient, back focal length, and the negative refractive power of the third lens element L3 of the sixth embodiment are different from those of the first embodiment. For the optical characteristics and distance values ​​of each lens element of the optical imaging lens 6 of this embodiment, please refer to Figure 28 , it can be seen that the EFL of the optical imaging lens 6 of this embodiment is 0.558mm, HFOV is 51.478 degrees, Fno is 2.068, image height is 0.445mm, and TTL is 1.650mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54A .

[0164] from Figure 27A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.006 to 0.003 mm, as can be seen from the deflection amplitude of each curve. Figure 27B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within -12.00~0.00μm. Figure 27CAmong the field curvature aberrations in the meridional direction, the focal length variation of the three representative wavelengths within the entire field of view falls within the range of -6.00 to 4.00 μm. Figure 27D The display distortion aberration is maintained within the range of -40% to 0%. Compared with the first embodiment, the display distortion aberration of this embodiment is smaller.

[0165] The above data demonstrates that the various optical properties of the optical imaging lens 6 meet the imaging quality requirements of the optical system. This demonstrates that, compared to conventional optical lenses, the optical imaging lens 6 of this embodiment can effectively provide superior imaging quality while offering a system length of 1.650 mm. Compared to the first embodiment, the system length of this embodiment is shorter, further contributing to a slimmer and more compact design.

[0166] refer to Figures 30 to 33 , Figure 30 A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to a seventh embodiment of the present invention is shown. Figure 31A 、 31B 31C and 31D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the seventh embodiment of the present invention. Figure 32 Displays detailed optical data of the optical imaging lens according to the seventh embodiment of the present invention. Figure 33 The aspheric surface data of each lens of the optical imaging lens according to the seventh embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 30 As shown in , the optical imaging lens system 7 of this embodiment includes a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 in sequence from the object side A1 to the image side A2 .

[0167] The concave-convex configuration of the object-side surfaces L1A1, L2A1, L3A1 facing the object side A1 and the image-side surfaces L1A2, L2A2 facing the image side A2 of the seventh embodiment, as well as the positive and negative refractive power configurations of each lens except the third lens L3, are generally similar to those of the first embodiment. However, the seventh embodiment differs from the first embodiment in terms of the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters, the concave-convex configuration of the image-side surface L3A2, and the negative refractive power of the third lens L3. Specifically, the difference in the concave-convex configuration is that the circumferential area L3A2P of the image-side surface L3A2 of the third lens L3 is concave. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 7 of this embodiment, please refer to Figure 32 , it can be seen that the EFL of the optical imaging lens 7 of this embodiment is 0.427mm, HFOV is 51.478 degrees, Fno is 2.096, image height is 0.413mm, and TTL is 1.737mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54B .

[0168] from Figure 31A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.006 to 0.002 mm, as can be seen from the deflection amplitude of each curve. Figure 31B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within -10.00 to 0.00μm. Figure 31C Among the field curvature aberrations in the meridional direction, the focal length variation of the three representative wavelengths within the entire field of view falls within the range of -6.00 to 7.00 μm. Figure 31D The display distortion aberration is maintained within the range of -25% to 0%. Compared with the first embodiment, the distortion aberration of this embodiment is smaller.

[0169] The above data demonstrates that the various optical properties of the optical imaging lens 7 meet the imaging quality requirements of the optical system. This demonstrates that, compared to existing optical lenses, the optical imaging lens 7 of this embodiment can effectively provide superior imaging quality while offering a system length of 1.737 mm. Compared to the first embodiment, the system length of this embodiment is shorter, further contributing to a slimmer and more compact design.

[0170] refer to Figures 34 to 37 , Figure 34 A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to an eighth embodiment of the present invention is shown. Figure 35A 、 35B 35C and 35D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eighth embodiment of the present invention. Figure 36 Displays detailed optical data of the optical imaging lens according to the eighth embodiment of the present invention. Figure 37 The aspheric surface data of each lens of the optical imaging lens according to the eighth embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 34 As shown in , the optical imaging lens system 8 of this embodiment includes a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 in sequence from the object side A1 to the image side A2 .

[0171] The concave-convex configuration of the object-side surfaces L1A1, L2A1, L3A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L3A2 facing the image side A2 of the eighth embodiment, as well as the positive and negative refractive power configuration of each lens, are generally similar to those of the first embodiment. However, the optical parameters such as the curvature radius, lens thickness, aspheric coefficient, back focal length, etc. of the eighth embodiment are different from those of the first embodiment. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 8 of this embodiment, please refer to Figure 36, it can be seen that the EFL of the optical imaging lens 8 of this embodiment is 0.565mm, HFOV is 51.478 degrees, Fno is 1.581, image height is 0.452mm, and TTL is 1.595mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54B .

[0172] from Figure 35A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.006 to 0.009 mm, as can be seen from the deflection amplitude of each curve. Figure 35B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within the range of -18.00 to -4.00μm. Figure 35C Among the field curvature aberrations in the tangential direction, the focal length variation of the three representative wavelengths within the entire field of view falls within the range of -8.00 to 6.00 μm. Figure 35D The display distortion aberration is maintained within the range of -40% to 0%. Compared with the first embodiment, the display distortion aberration of this embodiment is smaller.

[0173] The above data demonstrates that the various optical properties of the optical imaging lens 8 meet the imaging quality requirements of the optical system. This demonstrates that, compared to conventional optical lenses, the optical imaging lens 8 of this embodiment can effectively provide superior imaging quality while offering a system length of 1.595 mm. Compared to the first embodiment, the system length of this embodiment is shorter, further contributing to a slimmer and more compact design.

[0174] refer to Figures 38 to 41 , Figure 38 A schematic diagram showing the cross-sectional structure of a three-piece lens of an optical imaging lens according to a ninth embodiment of the present invention is shown. Figure 39A 、 39B 39C and 39D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the ninth embodiment of the present invention. Figure 40 Displays detailed optical data of the optical imaging lens according to the ninth embodiment of the present invention. Figure 41 The aspheric surface data of each lens of the optical imaging lens according to the ninth embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 38 As shown in , the optical imaging lens system 9 of this embodiment includes a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 in sequence from the object side A1 to the image side A2 .

[0175] The convex-concave surface configurations of the object-side surface L3A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L3A2 facing the image side A2 of the ninth embodiment and the positive and negative refractive power configurations of each lens are substantially similar to those of the first embodiment, except that the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters of the ninth embodiment and the convex-concave surface configurations of the object-side surfaces L1A1, L2A1 are different from those of the first embodiment. Specifically, the difference in the convex-concave surface configurations is that the optical axis area L1A1C of the object-side surface L1A1 of the first lens L1 is concave and the circumferential area L1A1P is concave, and the optical axis area L2A1C of the object-side surface L2A1 of the second lens L2 is concave and the circumferential area L2A1P is concave. For the values ​​of the optical characteristics and distances of each lens of the optical imaging lens 9 of this embodiment, please refer to Figure 40 , it can be seen that the EFL of the optical imaging lens 9 of this embodiment is 0.823mm, HFOV is 33.656 degrees, Fno is 3.402, image height is 0.449mm, and TTL is 1.952mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54B .

[0176] from Figure 39A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.010 to 0.003 mm, as can be seen from the deflection amplitude of each curve. Figure 39B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within -12.00 to -6.00μm. Figure 39C Among the field curvature aberrations in the tangential direction, the focal length variation of the three representative wavelengths within the entire field of view falls within the range of -12.00 to -6.00 μm. Figure 39D The display distortion aberration is maintained within the range of -18% to 0%. Compared with the first embodiment, the display distortion aberration of this embodiment is smaller.

[0177] The above data shows that the various optical properties of the optical imaging lens 9 meet the imaging quality requirements of the optical system. This shows that the optical imaging lens 9 of this embodiment can effectively provide better imaging quality while providing a system length of 1.952 mm compared to conventional optical lenses.

[0178] refer to Figures 42 to 45 , Figure 42 A schematic diagram showing the cross-sectional structure of a three-piece lens of the optical imaging lens according to the tenth embodiment of the present invention is shown. Figure 43A 、 43B 43C and 43D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the tenth embodiment of the present invention. Figure 44Detailed optical data of the optical imaging lens according to the tenth embodiment of the present invention is shown. Figure 45 The aspheric surface data of each lens of the optical imaging lens according to the tenth embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 42 As shown in , the optical imaging lens 10 of this embodiment includes a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 in sequence from the object side A1 to the image side A2 .

[0179] The surface concave-convex configurations of the object-side surface L1A1 facing the object side A1 and the image-side surfaces L1A2 and L3A2 facing the image side A2 of the tenth embodiment, as well as the positive and negative refractive power configurations of each lens except the second lens L2, are generally similar to those of the first embodiment. However, the tenth embodiment differs from the first embodiment in terms of the relevant optical parameters such as the curvature radius, lens thickness, aspheric coefficient, back focal length, the surface concave-convex configurations of the object-side surfaces L2A1, L3A1, and the image-side surface L2A2, and the negative refractive power of the second lens L2. Specifically, the difference in the surface concave-convex configurations is that the circumferential region L2A1P of the object-side surface L2A1 of the second lens L2 is concave, the optical axis region L2A2C of the image-side surface L2A2 of the second lens L2 is concave, and the optical axis region L3A1C of the object-side surface L3A1 of the third lens L3 is convex. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 10 of this embodiment, please refer to Figure 44 , it can be seen that the EFL of the optical imaging lens 10 of this embodiment is 0.511mm, HFOV is 51.478 degrees, Fno is 4.236, image height is 0.437mm, and TTL is 1.939mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54B .

[0180] from Figure 43A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.012 to 0.008 mm, as can be seen from the deflection amplitude of each curve. Figure 43B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within the range of 0.00 to 0.035mm. Figure 43C Among the field curvature aberrations in the meridional direction, the focal length changes of the three representative wavelengths within the entire field of view fall within the range of -0.01 to 0.015 mm. Figure 43D The display distortion aberration is maintained within the range of -35% to 0%. Compared with the first embodiment, the display distortion aberration of this embodiment is smaller.

[0181] The above data show that the various optical properties of the optical imaging lens 10 meet the imaging quality requirements of the optical system. This shows that the optical imaging lens 10 of this embodiment can effectively provide better imaging quality while providing a system length of 1.939 mm compared to conventional optical lenses.

[0182] refer to Figures 46 to 49 , Figure 46 A schematic diagram showing the cross-sectional structure of a three-piece lens of the optical imaging lens according to the eleventh embodiment of the present invention is shown. Figure 47A 、 47B 47C and 47D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eleventh embodiment of the present invention. Figure 48 Displays detailed optical data of the optical imaging lens according to the eleventh embodiment of the present invention. Figure 49 The aspheric surface data of each lens of the optical imaging lens according to the eleventh embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 46 As shown in , the optical imaging lens 11 of this embodiment includes a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 in sequence from the object side A1 to the image side A2 .

[0183] The surface concave-convex configurations of the object-side surfaces L1A1, L2A1 facing the object side A1 and the image-side surfaces L1A2, L3A2 facing the image side A2 of the eleventh embodiment, as well as the positive and negative refractive power configurations of each lens, are substantially similar to those of the first embodiment, except that the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters of the eleventh embodiment, as well as the surface concave-convex configurations of the object-side surface L3A1 and the image-side surface L2A2, are different from those of the first embodiment. Specifically, the difference in the surface concave-convex configurations is that the circumferential region L2A2P of the image-side surface L2A2 of the second lens L2 is concave and the optical axis region L2A2C is concave, and the circumferential region L3A1P of the object-side surface L3A1 of the third lens L3 is convex and the optical axis region L3A1C is convex. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 11 of this embodiment, please refer to Figure 48 , it can be seen that the EFL of the optical imaging lens 11 of this embodiment is 0.366mm, HFOV is 51.478 degrees, Fno is 3.057, image height is 0.395mm, and TTL is 1.500mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54B .

[0184] from Figure 47A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.005 to 0.0025 mm, as can be seen from the deflection amplitude of each curve. Figure 47BIn the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within -16.00 to -2.00μm. Figure 47C Among the field curvature aberrations in the tangential direction, the focal length changes of the three representative wavelengths within the entire field of view fall within the range of -18.00 to 0.00 μm. Figure 47D The display distortion aberration is maintained within the range of -16% to 0%. Compared with the first embodiment, the distortion aberration of this embodiment is smaller.

[0185] The above data demonstrates that the various optical properties of the optical imaging lens 11 meet the imaging quality requirements of the optical system. This demonstrates that, compared to conventional optical lenses, the optical imaging lens 11 of this embodiment can effectively provide superior imaging quality while offering a system length of 1.500 mm. Compared to the first embodiment, the system length of this embodiment is shorter, further contributing to a slimmer and more compact design.

[0186] refer to Figures 50 to 53 , Figure 50 A schematic diagram showing the cross-sectional structure of a three-piece lens of the optical imaging lens according to the twelfth embodiment of the present invention is shown. Figure 51A 、 51B 51C and 51D are schematic diagrams showing longitudinal spherical aberration and various aberrations of the optical imaging lens according to the twelfth embodiment of the present invention. Figure 52 Displays detailed optical data of the optical imaging lens according to the twelfth embodiment of the present invention. Figure 53 The aspheric surface data of each lens of the optical imaging lens according to the twelfth embodiment of the present invention are shown. Please note that those not listed are all zero. Figure 50 As shown in , the optical imaging lens 12 of this embodiment includes a first lens L1 , an aperture STO, a second lens L2 , and a third lens L3 in sequence from the object side A1 to the image side A2 .

[0187] The convex-concave configuration of the object-side surface L3A1 facing the object side A1 and the image-side surface L3A2 facing the image side A2, as well as the positive and negative refractive power configuration of each lens element other than the second lens element L2, of the twelfth embodiment are substantially similar to those of the first embodiment. However, the twelfth embodiment differs from the first embodiment in optical parameters such as the curvature radius, lens thickness, aspheric coefficient, back focal length, the concave-convex configuration of the object-side surfaces L1A1, L2A1 and the image-side surfaces L1A2, L2A2, and the negative refractive power of the second lens element L2. Specifically, the difference in the concave-convex surface configuration is that the circumferential area L1A1P of the object-side surface L1A1 of the first lens L1 is concave and the optical axis area L1A1C is concave, the circumferential area L1A2P of the image-side surface L1A2 of the first lens L1 is convex, the circumferential area L2A1P of the object-side surface L2A1 of the second lens L2 is concave and the optical axis area L2A1C is concave, and the optical axis area L2A2C of the image-side surface L2A2 of the second lens L2 is concave. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 12 of this embodiment, please refer to Figure 52 , it can be seen that the EFL of the optical imaging lens 12 of this embodiment is 0.509mm, HFOV is 51.478 degrees, Fno is 3.892, image height is 0.454mm, and TTL is 1.739mm. For the numerical values ​​of the various design parameter combinations, please refer to Figure 54B .

[0188] from Figure 51A In the longitudinal spherical aberration, the deviation of the imaging point of off-axis light at different heights is controlled within -0.0025 to 0.001 mm, as can be seen from the deflection amplitude of each curve. Figure 51B In the field curvature aberration in the sagittal direction, the focal length variation of the three representative wavelengths (930nm, 940nm, 950nm) in the entire field of view falls within -12.00~4.00μm. Figure 51C Among the field curvature aberrations in the meridional direction, the focal length variation of the three representative wavelengths in the entire field of view falls within the range of -18.00 to 12.00 μm. Figure 51D The display distortion aberration is maintained within the range of -30% to 0%. Compared with the first embodiment, the longitudinal spherical aberration and distortion aberration of this embodiment are smaller.

[0189] The above data demonstrates that the various optical properties of the optical imaging lens 12 meet the imaging quality requirements of the optical system. This demonstrates that, compared to conventional optical lenses, the optical imaging lens 12 of this embodiment can effectively provide superior imaging quality while offering a system length of 1.739 mm. Compared to the first embodiment, the system length of this embodiment is shorter, further contributing to a slimmer and more compact design.

[0190] Figure 54A 、 54BFrom the numerical values ​​of the various parameter combinations of the twelve embodiments listed above, as well as the detailed optical data and tables of each embodiment, it can be seen that the optical imaging lens of the present invention can indeed satisfy any of the aforementioned conditional equations (1) to (22).

[0191] The longitudinal spherical aberration, field curvature, and distortion of each embodiment of the optical imaging lens of the present invention all meet operating specifications. Furthermore, off-axis light rays at different heights and three representative wavelengths are all concentrated near the image point. The deviation amplitude of each curve indicates that the deviation of the image point for off-axis light rays at different heights is controlled, demonstrating excellent spherical aberration, aberration, and distortion suppression. Further reference to the imaging quality data reveals that the distances between the three representative wavelengths are also very close, demonstrating the present invention's excellent concentration of light of different wavelengths and superior dispersion suppression under various conditions. In summary, the present invention, through the design and coordination of the lenses, can produce excellent imaging quality.

[0192] The contents disclosed in various embodiments of the present invention include, but are not limited to, optical parameters such as focal length, lens thickness, and Vd Abbe number. For example, each embodiment of the present invention discloses an optical parameter A and an optical parameter B. The ranges covered by these optical parameters, the comparative relationships between the optical parameters, and the conditional ranges covered by various embodiments are specifically explained as follows:

[0193] (1) The range covered by the optical parameters, for example: α2≦A≦α1 or β2≦B≦β1, α1 is the maximum value of the optical parameter A in multiple embodiments, α2 is the minimum value of the optical parameter A in multiple embodiments, β1 is the maximum value of the optical parameter B in multiple embodiments, and β2 is the minimum value of the optical parameter B in multiple embodiments.

[0194] (2) The comparative relationship between optical parameters, for example: A is greater than B or A is less than B.

[0195] (3) The range of conditions covered by multiple embodiments, specifically, the combination relationship or proportional relationship obtained by possible calculation of multiple optical parameters of the same embodiment, these relationships are defined as E. E can be, for example: A+B or AB or A / B or A*B or (A*B) 1 / 2 , and E satisfies the conditional formula E≦γ1 or E≧γ2 or γ2≦E≦γ1, γ1 and γ2 are the values ​​obtained by calculating the optical parameters A and B of the same embodiment, and γ1 is the maximum value among multiple embodiments of the present invention, and γ2 is the minimum value among multiple embodiments of the present invention.

[0196] The ranges encompassed by the aforementioned optical parameters, the comparative relationships between the optical parameters, and the maximum and minimum values, as well as the numerical ranges within these conditional expressions, are all features that enable the present invention to be implemented and fall within the scope disclosed herein. The above is merely illustrative and should not be construed as limiting.

[0197] All embodiments of the present invention are applicable, and some feature combinations can be extracted from the same embodiment. These feature combinations can achieve unexpected benefits compared to prior art. These feature combinations include, but are not limited to, combinations of features such as face shape, refractive index, and conditional formula. The disclosure of the embodiments of the present invention is intended to illustrate the principles of the present invention and should not be construed as limiting the present invention to the disclosed embodiments. Furthermore, the embodiments and accompanying figures are intended for illustrative purposes only and are not intended to limit the present invention.

Claims

1. An optical imaging lens comprising, in order from an object side to an image side along an optical axis, a first lens, a second lens, and a third lens, wherein each of the first to third lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes; The refractive power of the first lens is negative; and in, V1 represents the Vd Abbe number of the first lens element, V2 represents the Vd Abbe number of the second lens element, V3 represents the Vd Abbe number of the third lens element, TTL represents the system length of the optical imaging lens element, AAG represents the sum of the two air gaps between the first lens element and the third lens element on the optical axis, Fno represents the aperture value of the optical imaging lens element, ALT represents the sum of the thicknesses of the three lenses between the first lens element and the third lens element on the optical axis, BFL represents the distance from the image-side surface of the third lens element to an imaging plane on the optical axis. The optical imaging lens element comprises only the aforementioned three lenses and satisfies the following conditions: V1+V2+V3≤85.500, TTL / AAG≥2.700, and Fno*ALT / BFL≤4.

800.

2. An optical imaging lens comprising, in order from an object side to an image side along an optical axis, a first lens, a second lens, and a third lens, wherein each of the first to third lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes; The refractive power of the first lens is negative; and An optical axis region of the image-side surface of the third lens is a convex surface; in, V1 represents the Vd Abbe number of the first lens element, V2 represents the Vd Abbe number of the second lens element, V3 represents the Vd Abbe number of the third lens element, TTL represents the system length of the optical imaging lens element, AAG represents the sum of the two air gaps between the first lens element and the third lens element on the optical axis, Fno represents the aperture value of the optical imaging lens element, and BFL represents the distance from the image-side surface of the third lens element to an imaging plane on the optical axis. The optical imaging lens element consists of only the aforementioned three lenses and satisfies the following conditions: V1+V2+V3≤85.500, TTL / AAG≥2.700, and Fno*TTL / BFL≤9.

000.

3. The optical imaging lens according to claim 1 or 2, wherein the optical imaging lens further satisfies Fno*TL / BFL≤6.050, where TL represents the distance from the object-side surface of the first lens element to the image-side surface of the third lens element on the optical axis.

4. An optical imaging lens comprising, in order from an object side to an image side along an optical axis, a first lens, a second lens, and a third lens, wherein each of the first to third lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes; The refractive power of the first lens is negative; in, V1 represents the Vd Abbe number of the first lens element, V2 represents the Vd Abbe number of the second lens element, V3 represents the Vd Abbe number of the third lens element, TTL represents the system length of the optical imaging lens element, AAG represents the sum of the two air gaps between the first lens element and the third lens element on the optical axis, BFL represents the distance from the image-side surface of the third lens element to an imaging plane on the optical axis, and the optical imaging lens element comprises only the aforementioned three lenses, and satisfies V1+V2+V3≤85.500, TTL / AAG≥2.700, and TTL / BFL≤3.

150.

5. The optical imaging lens according to claim 2 or 4, wherein the optical imaging lens further satisfies ALT / EPD ≥ 1.500, where ALT represents the total thickness of the first to third lenses along the optical axis, and EPD represents an entrance pupil diameter of the optical imaging lens.

6. The optical imaging lens according to claim 2 or 4, wherein the optical imaging lens further satisfies ALT / G23 ≥ 7.400, where ALT represents the total thickness of the three lenses from the first lens to the third lens on the optical axis, and G23 represents the distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis.

7. The optical imaging lens according to claim 1, 2 or 4, wherein the optical imaging lens further satisfies BFL / AAG≥1.

250.

8. The optical imaging lens according to claim 1, 2, or 4, wherein the optical imaging lens further satisfies (T1+T2) / G23≥4.750, where T1 represents the thickness of the first lens element on the optical axis, T2 represents the thickness of the second lens element on the optical axis, and G23 represents the distance on the optical axis from the image-side surface of the second lens element to the object-side surface of the third lens element.

9. The optical imaging lens of claim 1 , 2 or 4 , wherein the optical imaging lens further satisfies BFL / Tmin≥2.400, where Tmin represents the minimum thickness of the three lenses of the first lens element to the third lens element on the optical axis. 10 . The optical imaging lens of claim 1 , 2 or 4 , wherein the optical imaging lens further satisfies BFL / TL ≥ 0.450, where TL represents the distance from the object-side surface of the first lens element to the image-side surface of the third lens element on the optical axis.

11. The optical imaging lens according to claim 1, 2 or 4, wherein the optical imaging lens further satisfies BFL / Tavg≥1.750, where Tavg represents an average thickness of the three lenses of the first lens to the third lens on the optical axis. 12 . The optical imaging lens according to claim 1 , 2 or 4 , wherein the optical imaging lens further satisfies BFL / EFL≧1.050, where EFL represents the effective focal length of the optical imaging lens. 13 . The optical imaging lens according to claim 1 , 2 or 4 , wherein the optical imaging lens further satisfies BFL / ImgH ≥ 1.450, where ImgH represents the maximum image height of the optical imaging lens.

14. The optical imaging lens of claim 1 , 2 or 4 , wherein the optical imaging lens further satisfies BFL / (EFL+ImgH)≥0.600, where EFL represents the effective focal length of the optical imaging lens, and ImgH represents the maximum image height of the optical imaging lens. 15 . The optical imaging lens according to claim 1 , 2 or 4 , wherein the optical imaging lens further satisfies (TTL+ImgH) / BFL≤3.800, where ImgH represents the maximum image height of the optical imaging lens.

16. The optical imaging lens of claim 1 , 2 or 4 , wherein the optical imaging lens further satisfies (TL + ImgH) / BFL ≤ 2.800, where TL represents the distance on the optical axis from the object-side surface of the first lens element to the image-side surface of the third lens element, and ImgH represents the maximum image height of the optical imaging lens.

17. The optical imaging lens of claim 1 , 2 , or 4 , further satisfying (T2 + T3) / G23 ≥ 4.900, where T2 represents the thickness of the second lens element on the optical axis, T3 represents the thickness of the third lens element on the optical axis, and G23 represents the distance on the optical axis from the image-side surface of the second lens element to the object-side surface of the third lens element.

18. The optical imaging lens of claim 1, 2 or 4, wherein the optical imaging lens further satisfies EFL / EPD≥1.550, where EFL represents the effective focal length of the optical imaging lens, and EPD represents the entrance pupil diameter of the optical imaging lens.

19. The optical imaging lens of claim 1, 2 or 4, wherein the optical imaging lens further satisfies BFL / G23 ≥ 10.500, where G23 represents the distance from the image-side surface of the second lens element to the object-side surface of the third lens element on the optical axis.

20. The optical imaging lens of claim 1 , 2 or 4 , wherein the optical imaging lens further satisfies G12 / G23 ≥ 2.350, where G12 represents the distance on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens, and G23 represents the distance on the optical axis from the image-side surface of the second lens to the object-side surface of the third lens.

Images