Optical imaging lens

Abstract

An optical imaging lens includes a first lens to a sixth lens, corresponding to a first focusing state and a second focusing state to achieve focusing. The first lens has a positive refractive index, the circumferential region of the image-side surface of the fifth lens is concave, the optical axis region of the image-side surface of the sixth lens is concave, and the circumferential region of the image-side surface of the sixth lens is convex. The optical imaging lens has only six lenses. TTL is the distance from the object-side surface of the first lens to the image plane on the optical axis, ΔHFOV is the absolute value of the half-angle change between the first focusing state and the second focusing state, and ΔG is the absolute value of the total change in air gap between the first focusing state and the second focusing state, satisfying TTL*ΔHFOV / ΔG≦19.500 degrees.

Description

Technical Field

[0001] This invention generally relates to an optical imaging lens. Specifically, this invention is particularly directed to an optical imaging lens primarily used for capturing images and videos, and applicable to portable electronic products such as mobile phones, cameras, tablet computers, or intelligent electronic products such as automotive devices and head-mounted displays (AR, VR, MR). Background Technology

[0002] In recent years, optical imaging lenses have continued to evolve, and their applications have become more extensive. In addition to the requirement for small lens size, the demand for recording electronic products is also increasing.

[0003] However, a shooting system consisting of multiple lenses with different functions, supplemented by software processing, not only takes up a lot of space when multiple lenses are arranged, but switching between lenses with different functions may also cause discontinuity in the footage during recording. Therefore, how to design a lens that can meet different shooting needs with a single lens, which is both lightweight and compact, and can focus at infinity and in macro mode, has become an urgent problem to be solved. Summary of the Invention

[0004] Therefore, various embodiments of the present invention propose a six-element optical imaging lens that is lightweight, compact, has excellent imaging quality, good optical performance, can focus at infinity or in macro distances, and is technically feasible. The optical imaging lens of the present invention comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side. Each of the first, second, third, fourth, fifth, and sixth lenses has an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through. The air gap distance between the first, second, third, fourth, fifth, or sixth lens may be variable, allowing the optical imaging lens to correspondingly form a first focusing state and a second focusing state to achieve focusing when the subject moves from infinity to macro distance.

[0005] In one embodiment of the present invention, the first lens has a positive refractive index, the circumferential region of the image-side surface of the fifth lens is concave, the optical axis region of the image-side surface of the sixth lens is concave, and the circumferential region of the image-side surface of the sixth lens is convex. The optical imaging lens has only six lenses and satisfies the following condition: TTL*ΔHFOV / ΔG≦19.500 degrees.

[0006] In another embodiment of the present invention, the first lens has positive refractive index, the optical axis region of the object-side surface of the second lens is convex, the optical axis region of the object-side surface of the fifth lens is concave, the circumferential region of the image-side surface of the fifth lens is concave, and the circumferential region of the image-side surface of the sixth lens is convex. The optical imaging lens has only six lenses and satisfies the following condition: TTL*ΔHFOV / ΔG≦19.500 degrees.

[0007] In another embodiment of the present invention, the first lens has a positive refractive index, the circumferential region of the object-side surface of the second lens is convex, the optical axis region of the object-side surface of the fifth lens is concave, the circumferential region of the image-side surface of the fifth lens is concave, and the circumferential region of the image-side surface of the sixth lens is convex. The optical imaging lens has only six lenses and satisfies the following condition: TTL*ΔHFOV / ΔG≦19.500 degrees.

[0008] In another embodiment of the present invention, the first lens has a positive refractive index, the third lens has a positive refractive index, or the optical axis region of the image-side surface of the third lens is convex, or the circumferential region of the image-side surface of the fifth lens is concave, the optical axis region of the image-side surface of the sixth lens is concave, and the circumferential region of the image-side surface of the sixth lens is convex. The optical imaging lens has only six lenses and satisfies the following condition: EFL / EFLA ≥ 1.300.

[0009] In another embodiment of the present invention, the second lens has a negative refractive index, the optical axis region of the image-side surface of the sixth lens is concave, and the circumferential region of the image-side surface of the sixth lens is convex. The optical imaging lens has only six lenses and satisfies the following condition: EFL / EFLA ≥ 1.300.

[0010] In the optical imaging lens of the present invention, the following conditions may also be selectively satisfied in various embodiments:

[0011] TTL / (AAG+BFL)≦1.900;

[0012] (T1+G12+T2) / T6≦3.300;

[0013] ALT / (G34+T4)≦5.800;

[0014] AAG / (T3+T5)≦3.000;

[0015] (T2+G23+T3) / G56≦7.000;

[0016] T6 / Tmin≦3.000;

[0017] TTL / (T2+G23)≧10.000;

[0018] (G34+T4+G45) / T6≦4.300;

[0019] TL / (G23+T4)≧5.000;

[0020] AAG / T2 ≥ 3.500;

[0021] T1 / (G12+G23)≧1.000;

[0022] (υ4+υ5) / υ6≦1.700;

[0023] TTL / BFL ≤ 5.500;

[0024] T6 / G56≦3.400;

[0025] EFL / (T2+G23)≧7.000;

[0026] ALT / Tmin ≤ 17.000;

[0027] (T3+T4) / (G23+T5)≧1.000;

[0028] TTL / ALT ≤ 2.800;

[0029] TTL / Tavg≦15.000;

[0030] TL / (Tmax+Tmin)≦7.500;

[0031] BFL / Tmax≦4.000.

[0032] Where T1 is defined as the thickness of the first lens on the optical axis; T2 is defined as the thickness of the second lens on the optical axis; T3 is defined as the thickness of the third lens on the optical axis; T4 is defined as the thickness of the fourth lens on the optical axis; T5 is defined as the thickness of the fifth lens on the optical axis; and T6 is defined as the thickness of the sixth lens on the optical axis. G12 is defined as the air gap between the first and second lenses on the optical axis; G23 is defined as the air gap between the second and third lenses on the optical axis; G34 is defined as the air gap between the third and fourth lenses on the optical axis; G45 is defined as the air gap between the fourth and fifth lenses on the optical axis; and G56 is defined as the air gap between the fifth and sixth lenses on the optical axis. AAG is defined as the sum of the five air gaps between the first and sixth lenses on the optical axis; and ΔG is defined as the absolute value of the change between the sum of the air gaps AAG1 in the first focusing state and the sum of the air gaps AAG2 in the second focusing state, i.e., ΔG=|AAG1-AAG2|.

[0033] Redefining: υ4 is defined as the Abbe number of the fourth lens; υ5 is defined as the Abbe number of the fifth lens; υ6 is defined as the Abbe number of the sixth lens. ALT is defined as the total thickness of the six lenses from the first to the sixth lens along the optical axis; Tmin is defined as the minimum thickness of the six lenses from the first to the sixth lens along the optical axis, i.e., the minimum among T1, T2, T3, T4, T5, and T6; Tmax is defined as the maximum thickness of the six lenses from the first to the sixth lens along the optical axis, i.e., the maximum among T1, T2, T3, T4, T5, and T6; Tavg is defined as the average thickness of the six lenses from the first to the sixth lens along the optical axis, i.e., Tavg = ALT / 6; TL is defined as the distance along the optical axis from the object side of the first lens to the image side of the sixth lens; TTL is defined as the distance along the optical axis from the object side of the first lens to the imaging plane; BFL is defined as the distance along the optical axis from the image side of the sixth lens to the imaging plane; EFL is defined as the effective focal length in the first focusing state; EFLA is defined as the effective focal length in the second focusing state; ΔHFOV is defined as the absolute value of the half-angle change of the optical imaging lens in the first and second focusing states. Attached Figure Description

[0034] To better understand the embodiments described in this specification, please refer to the following figures:

[0035] Figures 1 to 5 A schematic diagram illustrating the method for determining the curvature shape of the optical imaging lens of the present invention is shown;

[0036] Figure 6 A schematic diagram illustrating a first embodiment of the optical imaging lens of the present invention;

[0037] Figure 7A The longitudinal spherical aberration on the imaging plane is illustrated in the first focusing state of the first embodiment;

[0038] Figure 7B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the first embodiment;

[0039] Figure 7C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the first embodiment;

[0040] Figure 7D The distortion aberrations of the first focusing state of the first embodiment are illustrated;

[0041] Figure 7E The longitudinal spherical aberration on the imaging plane is illustrated in the second focusing state of the first embodiment;

[0042] Figure 7F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the first embodiment;

[0043] Figure 7G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the first embodiment;

[0044] Figure 7H The distortion aberrations of the second focusing state of the first embodiment are illustrated;

[0045] Figure 8 A schematic diagram illustrating a second embodiment of the optical imaging lens of the present invention;

[0046] Figure 9A The longitudinal spherical aberration on the imaging plane is illustrated in the first focusing state of the second embodiment;

[0047] Figure 9B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the second embodiment;

[0048] Figure 9C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the second embodiment;

[0049] Figure 9D The distortion aberrations of the first focusing state of the second embodiment are illustrated;

[0050] Figure 9E The second focusing state of the second embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0051] Figure 9F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the second embodiment;

[0052] Figure 9G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the second embodiment;

[0053] Figure 9H The distortion aberrations of the second focusing state of the second embodiment are illustrated;

[0054] Figure 10 A schematic diagram illustrating a third embodiment of the optical imaging lens of the present invention;

[0055] Figure 11A The longitudinal spherical aberration on the imaging plane is illustrated in the first focusing state of the third embodiment;

[0056] Figure 11B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the third embodiment;

[0057] Figure 11C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the third embodiment;

[0058] Figure 11D The distortion aberrations of the first focusing state of the third embodiment are illustrated;

[0059] Figure 11E The second focusing state of the third embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0060] Figure 11F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the third embodiment;

[0061] Figure 11G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the third embodiment;

[0062] Figure 11H The distortion aberrations of the second focusing state in the third embodiment are illustrated;

[0063] Figure 12 A schematic diagram illustrating a fourth embodiment of the optical imaging lens of the present invention;

[0064] Figure 13A The longitudinal spherical aberration on the imaging plane is illustrated in the first focusing state of the fourth embodiment;

[0065] Figure 13B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the fourth embodiment;

[0066] Figure 13C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the fourth embodiment;

[0067] Figure 13D The distortion aberrations of the first focusing state of the fourth embodiment are illustrated;

[0068] Figure 13E The longitudinal spherical aberration on the imaging plane is illustrated in the second focusing state of the fourth embodiment;

[0069] Figure 13F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the fourth embodiment;

[0070] Figure 13G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the fourth embodiment;

[0071] Figure 13H The distortion aberrations of the second focusing state in the fourth embodiment are illustrated.

[0072] Figure 14 A schematic diagram illustrating a fifth embodiment of the optical imaging lens of the present invention;

[0073] Figure 15A The first focusing state of the fifth embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0074] Figure 15B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the fifth embodiment;

[0075] Figure 15C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the fifth embodiment;

[0076] Figure 15D The distortion aberrations of the first focusing state of the fifth embodiment are illustrated;

[0077] Figure 15E The second focusing state of the fifth embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0078] Figure 15F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the fifth embodiment;

[0079] Figure 15G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the fifth embodiment;

[0080] Figure 15H The distortion aberrations of the second focusing state in the fifth embodiment are illustrated;

[0081] Figure 16 A schematic diagram illustrating a sixth embodiment of the optical imaging lens of the present invention;

[0082] Figure 17A The first focusing state of the sixth embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0083] Figure 17B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the sixth embodiment;

[0084] Figure 17C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the sixth embodiment;

[0085] Figure 17D The distortion aberrations of the first focusing state of the sixth embodiment are illustrated;

[0086] Figure 17E The second focusing state of the sixth embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0087] Figure 17F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the sixth embodiment;

[0088] Figure 17G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the sixth embodiment;

[0089] Figure 17H The distortion aberrations of the second focusing state in the sixth embodiment are illustrated;

[0090] Figure 18 A schematic diagram illustrating a seventh embodiment of the optical imaging lens of the present invention;

[0091] Figure 19A The first focusing state of the seventh embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0092] Figure 19B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the seventh embodiment;

[0093] Figure 19C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the seventh embodiment;

[0094] Figure 19D The distortion aberrations of the first focusing state of the seventh embodiment are illustrated;

[0095] Figure 19E The second focusing state of the seventh embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0096] Figure 19F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the seventh embodiment;

[0097] Figure 19G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the seventh embodiment;

[0098] Figure 19H The distortion aberrations of the second focusing state in the seventh embodiment are illustrated;

[0099] Figure 20 A schematic diagram illustrating an eighth embodiment of the optical imaging lens of the present invention;

[0100] Figure 21A The first focusing state of the eighth embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0101] Figure 21B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the eighth embodiment;

[0102] Figure 21C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the eighth embodiment;

[0103] Figure 21D The distortion aberrations of the first focusing state of the eighth embodiment are illustrated;

[0104] Figure 21E The second focusing state of the eighth embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0105] Figure 21F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the eighth embodiment;

[0106] Figure 21G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the eighth embodiment;

[0107] Figure 21H The distortion aberrations of the second focusing state in the eighth embodiment are illustrated;

[0108] Figure 22 A schematic diagram illustrating a ninth embodiment of the optical imaging lens of the present invention;

[0109] Figure 23A The longitudinal spherical aberration on the imaging plane is illustrated in the first focusing state of the ninth embodiment;

[0110] Figure 23B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the ninth embodiment;

[0111] Figure 23C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the ninth embodiment;

[0112] Figure 23D The distortion aberrations of the first focusing state of the ninth embodiment are illustrated;

[0113] Figure 23E The second focusing state of the ninth embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0114] Figure 23F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the ninth embodiment;

[0115] Figure 23G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the ninth embodiment;

[0116] Figure 23H The distortion aberrations of the second focusing state in the ninth embodiment are illustrated;

[0117] Figure 24 A schematic diagram illustrating a tenth embodiment of the optical imaging lens of the present invention;

[0118] Figure 25A The first focusing state of the tenth embodiment is illustrated with longitudinal spherical aberration on the imaging plane;

[0119] Figure 25B The field curvature aberration in the sagittal direction is illustrated in the first focusing state of the tenth embodiment;

[0120] Figure 25C The field curvature aberration in the meridional direction is illustrated in the first focusing state of the tenth embodiment;

[0121] Figure 25D The distortion aberrations of the first focusing state of the tenth embodiment are illustrated;

[0122] Figure 25E The longitudinal spherical aberration on the imaging plane is illustrated in the second focusing state of the tenth embodiment;

[0123] Figure 25F The field curvature aberration in the sagittal direction is illustrated in the second focusing state of the tenth embodiment;

[0124] Figure 25G The field curvature aberration in the meridional direction is illustrated in the second focusing state of the tenth embodiment;

[0125] Figure 25H The distortion aberrations of the second focusing state in the tenth embodiment are illustrated;

[0126] Figure 26 Detailed optical data diagrams of the first embodiment;

[0127] Figure 27 This diagram shows detailed aspherical data for the first embodiment.

[0128] Figure 28 Detailed optical data diagrams of the second embodiment;

[0129] Figure 29 This shows a detailed aspherical data diagram of the second embodiment;

[0130] Figure 30 Detailed optical data diagrams of the third embodiment;

[0131] Figure 31 This diagram shows detailed aspherical data for the third embodiment.

[0132] Figure 32 Detailed optical data diagrams of the fourth embodiment;

[0133] Figure 33 This shows a detailed aspherical data diagram of the fourth embodiment;

[0134] Figure 34 Detailed optical data diagrams of the fifth embodiment;

[0135] Figure 35 This diagram shows detailed aspherical data for the fifth embodiment.

[0136] Figure 36 Detailed optical data diagrams of the sixth embodiment;

[0137] Figure 37 This diagram shows detailed aspherical data for the sixth embodiment.

[0138] Figure 38 Detailed optical data diagrams of the seventh embodiment;

[0139] Figure 39 This shows a detailed aspherical data diagram of the seventh embodiment;

[0140] Figure 40Detailed optical data diagrams of the eighth embodiment;

[0141] Figure 41 This diagram shows detailed aspherical data for the eighth embodiment.

[0142] Figure 42 Detailed optical data diagrams of the ninth embodiment;

[0143] Figure 43 This shows a detailed aspherical data diagram of the ninth embodiment;

[0144] Figure 44 Detailed optical data diagrams of the tenth embodiment;

[0145] Figure 45 This shows a detailed aspherical data diagram of the tenth embodiment;

[0146] Figure 46 A diagram illustrating key parameters of the first focusing state in each embodiment is provided.

[0147] Figure 47 A diagram illustrating key parameters of the second focusing state in each embodiment is provided.

[0148] Figure 48 A diagram illustrating key parameters of the first focusing state in each embodiment is provided.

[0149] Figure 49 A diagram illustrating key parameters of the second focus state in each embodiment is provided. Detailed Implementation

[0150] Before describing the invention in detail, the symbols in the accompanying drawings are clearly explained as follows: 1... Optical imaging lens; 2... Aperture; 3... Filter; 4... Imaging plane; 11, 21, 31, 41, 51, 61, 110, 410, 510... Object-side plane; 12, 22, 32, 42, 52, 62, 120, 320... Image-side plane; 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, Z1... Optical axis region; 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, Z2... Circumferential region; 10... First lens; 20... ··Second lens; 30···Third lens; 40···Fourth lens; 50···Fifth lens; 60···Sixth lens; 100, 200, 300, 400, 500···Lens; 130···Assembly section; 211, 212···Parallel rays; A1···Object side; A2···Image side; CP···Center point; CP1···First center point; CP2···Second center point; TP1···First conversion point; TP2···Second conversion point; OB···Optical boundary; I···Optical axis; Lc···Principal ray; Lm···Edge ray; EL···Extension line; Z3···Relay region; M, R···Intersection point.

[0151] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of this invention and are primarily used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. The elements in the drawings are not drawn to scale, and similar element symbols are generally used to represent similar elements.

[0152] 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.

[0153] The optical system described in this specification includes at least one lens that receives imaging rays incident on the optical system from parallel to the optical axis to within a half-angle (HFOV) relative to the optical axis. The imaging rays pass through the optical system and form an image on the imaging plane. The statement "a lens has a positive refractive index (or negative refractive index)" means that the paraxial refractive index of the lens, calculated using Gaussian optics theory, is positive (or negative). The statement "object side (or image side) of the lens" is defined as the specific range through which the imaging rays pass on the lens surface. The imaging rays include at least two types of rays: the chief ray (Lc) and the marginal ray (Lm) (e.g., ...). Figure 1(As shown). The object-side (or image-side) of the lens can be divided into different regions depending on the location, including the optical axis region, the circumferential region, or one or more relay regions in some embodiments, which will be described in detail below.

[0154] Figure 1 This is a radial sectional view of lens 100. Two reference points are defined on the surface of lens 100: a center point and a transition point. The center point of the lens surface is the intersection point of this surface and the optical axis I. For example... Figure 1 As illustrated, the first center point CP1 is located on the object-side surface 110 of lens 100, and the second center point CP2 is located on the image-side surface 120 of lens 100. A transition point is a point on the lens surface whose tangent is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the outermost radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the surface of lens 100 may have no transition points or at least one transition point. If a single lens surface has multiple transition points, these transition points are named sequentially from the first transition point in the radially outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (as shown in the example), and the third transition point TP2 (as shown in the example) are named sequentially from the first transition point in the radially outward direction. Figure 4 (as shown) and the Nth conversion point (farthest from optical axis I).

[0155] When the lens surface has at least one transition point, the region from the center point to the first transition point TP1 is defined as the optical axis region, which includes the center point. The region radially outward from the transition point farthest from optical axis I (the Nth transition point) to the optical boundary OB is defined as the circumferential region. In some embodiments, a relay region may be included between the optical axis region and the circumferential region; the number of relay regions depends on the number of transition points. When the lens surface does not have a transition point, 0% to 50% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the optical axis region, and 50% to 100% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the circumferential region.

[0156] When a ray parallel to optical axis I passes through a region, if the ray bends towards optical axis I and the intersection point with optical axis I is located on the image side A2 of the lens, then that region is a convex surface. When a ray parallel to optical axis I passes through a region, if the extension of the ray intersects optical axis I at the object side A1 of the lens, then that region is a concave surface.

[0157] In addition, see Figure 1The lens 100 may also include an assembly portion 130 extending radially outward from the optical boundary OB. The assembly portion 130 is generally used for assembling the lens 100 to a corresponding element (not shown) in an optical system. Imaging rays do not reach the assembly portion 130. The structure and shape of the assembly portion 130 are merely illustrative examples of the invention and are not intended to limit the scope of the invention. The assembly portion 130 of the lens discussed below may be partially or entirely omitted in the drawings.

[0158] See Figure 2 Define the region between the center point CP and the first conversion point TP1 as the optical axis region Z1. Define the region between the first conversion point TP1 and the optical boundary OB of the lens surface as the circumferential region Z2. For example... Figure 2 As shown, parallel ray 211 intersects optical axis I at the image side A2 of lens 200 after passing through optical axis region Z1. That is, the focal point of parallel ray 211 passing through optical axis region Z1 is located at point R on the image side A2 of lens 200. Since the ray intersects optical axis I at the image side A2 of lens 200, optical axis region Z1 is convex. Conversely, parallel ray 212 diverges after passing through circular region Z2. Figure 2 As shown, the extension EL of parallel ray 212 after passing through the circular region Z2 intersects the optical axis I at the object side A1 of the lens 200. That is, the focal point of parallel ray 212 after passing through the circular region Z2 is located at point M on the object side A1 of the lens 200. Since the extension EL of the ray intersects the optical axis I at the object side A1 of the lens 200, the circular region Z2 is concave. Figure 2 In the lens 200 shown, the first conversion point TP1 is the boundary between the optical axis region and the circumferential region, that is, the first conversion point TP1 is the boundary point between the convex surface and the concave surface.

[0159] On the other hand, the convexity / concavity of the optical axis region can also be determined using the method commonly used by those knowledgeable in the field: judging the convexity / concavity of the lens's optical axis region by the sign of the paraxial radius of curvature (R-value). The R-value is commonly used in optical design software, such as Zemax or CodeV. It is also frequently found in lens data sheets within optical design software. For the object-side, a positive R-value indicates a convex optical axis region, while a negative R-value indicates a concave optical axis region. Conversely, for the image-side, a positive R-value indicates a concave optical axis region, while a negative R-value indicates a convex optical axis region. This method yields results consistent with the aforementioned method using the intersection of a ray / ray extension with the optical axis, where the focal point of a ray parallel to the optical axis is located on either the object-side or image-side of the lens to determine the convexity / concavity. The terms "a region is convex (or concave)," "a region is convex (or concave)," or "a convex (or concave) region" as described in this specification may be used interchangeably.

[0160] Figures 3 to 5 Examples of determining the surface shape and boundaries of the lens region in various situations are provided, including the aforementioned optical axis region, circumferential region, and relay region.

[0161] Figure 3 This is a radial sectional view of lens 300. See also... Figure 3 The image-side surface 320 of lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis region Z1 and circumferential region Z2 of the image-side surface 320 of lens 300 are as follows... Figure 3 As shown. The R value of the side surface 320 of this image is positive (i.e., R>0), therefore, the optical axis region Z1 is concave.

[0162] Generally, the surface shape of each region bounded by a transition point will be opposite to that of its adjacent regions. Therefore, the transition point can be used to define the change in surface shape, i.e., from the transition point, a surface changes from concave to convex or from convex to concave. Figure 3 In the middle, since the optical axis region Z1 is concave and its shape changes at the transition point TP1, the circumferential region Z2 is convex.

[0163] Figure 4 This is a radial sectional view of lens 400. See also... Figure 4 The object-side surface 410 of lens 400 has a first conversion point TP1 and a second conversion point TP2. The area between the optical axis I and the first conversion point TP1 is defined as the optical axis region Z1 of the object-side surface 410. The R value of this object-side surface 410 is positive (i.e., R>0), therefore, the optical axis region Z1 is a convex surface.

[0164] The area between the second conversion point TP2 and the optical boundary OB of the object-side surface 410 of the lens 400 is defined as a circumferential region Z2, which is also a convex surface. Furthermore, the area between the first conversion point TP1 and the second conversion point TP2 is defined as a relay region Z3, which is also a concave surface. See again. Figure 4 The object-side surface 410, radially outward from the optical axis I, sequentially includes the optical axis region Z1 between the optical axis I and the first conversion point TP1, the relay region Z3 located between the first conversion point TP1 and the second conversion point TP2, and the circumferential region Z2 between the second conversion point TP2 and the optical boundary OB of the object-side surface 410 of the lens 400. Since the optical axis region Z1 is convex, and its surface shape changes to concave from the first conversion point TP1, the relay region Z3 is concave. Furthermore, its surface shape changes to convex again from the second conversion point TP2, so the circumferential region Z2 is convex.

[0165] Figure 5This is a radial sectional view of lens 500. The object-side surface 510 of lens 500 has no transition point. For a lens surface without a transition point, such as the object-side surface 510 of lens 500, the optical axis region is defined as 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface, and the circumferential region is defined as 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface. See also Figure 5 The lens 500 shown defines the optical axis region Z1 of the object-side surface 510 as 50% of the distance between the optical axis I and the optical boundary OB of the lens 500 surface measured from the optical axis I. The R value of this object-side surface 510 is positive (i.e., R>0), therefore, the optical axis region Z1 is convex. Since the object-side surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0166] like Figure 6 As shown, the optical imaging lens 1 of the present invention, from the object side A1 where an object (not shown) is placed to the image side A2 where the image is formed, along the optical axis I, is mainly composed of six lenses, sequentially including an aperture stop 2, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, a sixth lens 60, and an image plane 4. In one embodiment of the present invention, the optical imaging lens 1 sequentially includes an aperture stop 2, a front lens group 81, a rear lens group 82, and an image plane 4. The number of lenses in the front lens group 81 or the number of lenses in the rear lens group 82 of the optical imaging lens 1 of the present invention can be variable. In another embodiment of the present invention, the front lens group 81 may include at least two lenses, for example, it may include at least the first lens 10 and the second lens 20, but the present invention is not limited thereto. In yet another embodiment of the present invention, the rear lens group 82 may include at least two lenses, for example, it may include at least the fifth lens 50 and the sixth lens 60, but the present invention is not limited thereto.

[0167] The rear lens group 82 can move along the optical axis I, allowing the optical imaging lens 1 to achieve different focusing states, such as different first focusing states or second focusing states. The first focusing state and the second focusing state can be one where the object distance is infinity and the object distance is finite, respectively. In one embodiment of the present invention, the first focusing state can be where the object distance is infinity. Alternatively, in another embodiment of the present invention, the second focusing state can be where the object distance is finite, such as a macro state, but the present invention is not limited thereto.

[0168] Generally speaking, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the sixth lens 60 can all be made of transparent plastic, but this invention is not limited to this. Each lens has an appropriate refractive index. In the optical imaging lens 1 of this invention, there are only six lenses with refractive indices: the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the sixth lens 60. The optical axis I is the optical axis of the entire optical imaging lens 1, so the optical axis of each lens is the same as the optical axis of the optical imaging lens 1.

[0169] Furthermore, this optical imaging lens 1 also includes an aperture 2, which is set in an appropriate position. Figure 6 In this invention, aperture 2 is positioned on the side of the first lens 10 facing the object side A1, that is, between the object side A1 and the first lens 10. When light emitted from the object to be photographed (not shown) located on the object side A1 enters the optical imaging lens 1 of this invention, it sequentially passes through aperture 2, the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60, and the filter 3, and is then focused on the imaging surface 4 on the image side A2 to form a clear image. In various embodiments of this invention, the filter 3 is positioned between the sixth lens 60 and the imaging surface 4. It can be a filter with various suitable functions, such as an infrared cut-off filter, which is used to prevent infrared rays in the imaging light from being transmitted to the imaging surface 4 and affecting the image quality.

[0170] Each lens in the optical imaging lens 1 of the present invention has an object-side surface facing the object side A1 and through which imaging light passes, and an image-side surface facing the image side A2 and through which imaging light passes. Furthermore, each lens in the optical imaging lens 1 of the present invention also has an optical axis region and a circumferential region. For example, the first lens 10 has an object-side surface 11 and an image-side surface 12; the second lens 20 has an object-side surface 21 and an image-side surface 22; the third lens 30 has an object-side surface 31 and an image-side surface 32; the fourth lens 40 has an object-side surface 41 and an image-side surface 42; the fifth lens 50 has an object-side surface 51 and an image-side surface 52; and the sixth lens 60 has an object-side surface 61 and an image-side surface 62. Each object-side surface and each image-side surface also has an optical axis region and a circumferential region.

[0171] Each lens in the optical imaging lens 1 of the present invention also has a thickness T located on the optical axis I. For example, the first lens 10 has a first lens thickness T1, the second lens 20 has a second lens thickness T2, the third lens 30 has a third lens thickness T3, the fourth lens 40 has a fourth lens thickness T4, the fifth lens 50 has a fifth lens thickness T5, and the sixth lens 60 has a sixth lens thickness T6. ALT is the sum of the thicknesses of the six lenses from the first lens 10 to the sixth lens 60 on the optical axis I. That is, ALT = T1 + T2 + T3 + T4 + T5 + T6. Tmax is the maximum value of the thicknesses of the six lenses from the first lens 10 to the sixth lens 60 on the optical axis I, that is, the maximum value among T1, T2, T3, T4, T5, and T6. Tmin is the minimum value of the thicknesses of the six lenses from the first lens 10 to the sixth lens 60 on the optical axis I, that is, the minimum value among T1, T2, T3, T4, T5, and T6. Tavg is the average thickness of the six lenses from the first lens 10 to the sixth lens 60 along the optical axis I. That is, Tavg = ALT / 6.

[0172] Furthermore, in the optical imaging lens 1 of the present invention, each lens has an air gap distance located on the optical axis I. The optical imaging lens 1 of the present invention is designed as a focusing lens, so the air gap distances between the lenses may be variable. For example, the air gap between the first lens 10 and the second lens 20 is called G12, the air gap between the second lens 20 and the third lens 30 is called G23, the air gap between the third lens 30 and the fourth lens 40 is called G34, the air gap between the fourth lens 40 and the fifth lens 50 is called G45, and the air gap between the fifth lens 50 and the sixth lens 60 is called G56. Therefore, the sum of the distances of the five air gaps between the lenses located on the optical axis I from the first lens 10 to the sixth lens 60 is called AAG. That is, AAG = G12 + G23 + G34 + G45 + G56. AAG1 is the sum of the distances of the air gaps on the optical axis I when the optical imaging lens 1 is in the first focusing state; AAG2 is the sum of the distances of the air gaps on the optical axis I when the optical imaging lens 1 is in the second focusing state; ΔG is the absolute value of the change in the sum of the distances of the air gaps between the first focusing state and the second focusing state, that is, ΔG=|AAG1-AAG2|.

[0173] The distance from the object-side surface 11 of the first lens 10 to the image surface 4 on the optical axis I is the system length TTL of the optical imaging lens 1. The distance from the object-side surface 11 of the first lens 10 to the image-side surface 62 of the sixth lens 60 on the optical axis I is TL. ImgH (image height) is the image height of the optical imaging lens 1, and Fno is the aperture value of the optical imaging lens 1. When the rear lens group 82 in the optical imaging lens 1 moves along the optical axis I, the effective focal length of the first focusing state formed by the optical imaging lens 1 is EFL, and the effective focal length of the second focusing state formed by the optical imaging lens 1 is EFLA. HFOV is the half field of view of the optical imaging lens 1, that is, half of the maximum field of view, and ΔHFOV is the absolute value of the change in the half field of view of the optical imaging lens 1 in the first focusing state and the second focusing state. fG1 is the focal length of the front lens group 81, and fG2 is the focal length of the rear lens group 2.

[0174] When filter 3 is positioned between the sixth lens 60 and the imaging surface 4, G6F represents the air gap between the sixth lens 60 and filter 3 on the optical axis I, TF represents the thickness of filter 3 on the optical axis I, GFP represents the air gap between filter 3 and imaging surface 4 on the optical axis I, and BFL is the back focal length of the optical imaging lens 1, which is the distance between the image side 62 of the sixth lens 60 and the imaging surface 4 on the optical axis I, i.e., BFL = G6F + TF + GFP.

[0175] Furthermore, let us define: f1 as the focal length of the first lens 10; f2 as the focal length of the second lens 20; f3 as the focal length of the third lens 30; f4 as the focal length of the fourth lens 40; f5 as the focal length of the fifth lens 50; f6 as the focal length of the sixth lens 60; n1 as the refractive index of the first lens 10; n2 as the refractive index of the second lens 20; n3 as the refractive index of the third lens 30; n4 as the refractive index of the fourth lens 40; n5 as the refractive index of the fifth lens 50; n6 as the refractive index of the sixth lens 60; υ1 as the Abbe number of the first lens 10; υ2 as the Abbe number of the second lens 20; υ3 as the Abbe number of the third lens 30; υ4 as the Abbe number of the fourth lens 40; υ5 as the Abbe number of the fifth lens 50; and υ6 as the Abbe number of the sixth lens 60.

[0176] First Embodiment

[0177] Please see Figure 6 This example illustrates a first embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the first embodiment, please refer to... Figure 7A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 7BFor the field curvature aberration in the tangential direction during the first focusing state, please refer to [reference needed]. Figure 7C For distortion aberration in the first focusing state, please refer to [link / reference]. Figure 7D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 7E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 7F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 7G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 7H In all embodiments, the Y-axis of each spherical aberration map represents the field of view, and its highest point is 1.0. In the embodiments, the Y-axis of each aberration map and distortion map represents the image height. The image height (ImageHeight, ImgH) of the first embodiment is 3.500 mm.

[0178] The optical imaging lens 1 of the first embodiment mainly consists of an aperture 2, a front lens group 81, a rear lens group 82, and an imaging plane 4. In the first embodiment, the aperture 2 is located on the side of the first lens 10 in the front lens group 81 facing the object side A1. The front lens group 81 and the rear lens group 82 contain a total of six lenses with refractive indices: the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the sixth lens 60. Specifically, the front lens group 81 includes the first lens 10, the second lens 20, and the third lens 30, while the rear lens group 82 includes the fourth lens 40, the fifth lens 50, and the sixth lens 60.

[0179] The first lens 10 has a positive refractive index. The optical axis region 13 of the object-side surface 11 of the first lens 10 is convex, and its circumferential region 14 is also convex. The optical axis region 16 of the image-side surface 12 of the first lens 10 is concave, and its circumferential region 17 is also concave. Both the object-side surface 11 and the image-side surface 12 of the first lens 10 are aspherical, but this is not a limitation.

[0180] The second lens 20 has a positive refractive index. The optical axis region 23 of the object-side surface 21 of the second lens 20 is convex, and its circumferential region 24 is also convex. The optical axis region 26 of the image-side surface 22 of the second lens 20 is concave, and its circumferential region 27 is also convex. Both the object-side surface 21 and the image-side surface 22 of the second lens 20 are aspherical, but this is not a limitation.

[0181] The third lens 30 has a positive refractive index. The optical axis region 33 of the object-side surface 31 of the third lens 30 is convex and its circumferential region 34 is concave. The optical axis region 36 of the image-side surface 32 of the third lens 30 is convex and its circumferential region 37 is convex. Both the object-side surface 31 and the image-side surface 32 of the third lens 30 are aspherical, but this is not a limitation.

[0182] The fourth lens 40 has a negative refractive index. The optical axis region 43 of the object-side surface 41 of the fourth lens 40 is concave, and its circumferential region 44 is also concave. The optical axis region 46 of the image-side surface 42 of the fourth lens 40 is convex, and its circumferential region 47 is also concave. Both the object-side surface 41 and the image-side surface 42 of the fourth lens 40 are aspherical, but this is not a limitation.

[0183] The fifth lens 50 has a negative refractive index. The optical axis region 53 of the object-side surface 51 of the fifth lens 50 is concave and its circumferential region 54 is convex. The optical axis region 56 of the image-side surface 52 of the fifth lens 50 is convex and its circumferential region 57 is concave. Both the object-side surface 51 and the image-side surface 52 of the fifth lens 50 are aspherical, but this is not a limitation.

[0184] The sixth lens 60 has a positive refractive index. The optical axis region 63 of the object-side surface 61 of the sixth lens 60 is convex, and its circumferential region 64 is concave. The optical axis region 66 of the image-side surface 62 of the sixth lens 60 is concave, and its circumferential region 67 is convex. Both the object-side surface 61 and the image-side surface 62 of the sixth lens 60 are aspherical, but this is not a limitation.

[0185] In the optical imaging lens 1 of the present invention, all twelve surfaces—the object-side surfaces 11 / 21 / 31 / 41 / 51 / 61 and the image-side surfaces 12 / 22 / 32 / 42 / 52 / 62—from the first lens 10 to the sixth lens 60 can be aspherical, but are not limited thereto. If they are aspherical, these aspherical surfaces are defined by the following formula:

[0186]

[0187] in:

[0188] Y represents the perpendicular distance between a point on the aspherical surface and the optical axis I;

[0189] Z represents the depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface at a distance Y from the optical axis I and the tangent plane that is tangent to the vertex on the optical axis I of the aspherical surface).

[0190] R represents the radius of curvature of the lens surface near the optical axis I;

[0191] K is the conic constant;

[0192] a i Let a be the i-th order aspherical coefficient, where the a2 coefficient in each embodiment is 0.

[0193] The optical data of the optical imaging lens 1 system in the first embodiment are as follows: Figure 26 As shown, the aspherical data is as follows Figure 27As shown. In the optical imaging lens 1 system of the following embodiment, the aperture value (f-number) of the overall optical imaging lens 1 is Fno, the effective focal length in the first focusing state is EFL, the effective focal length in the second focusing state is EFLA, and the half field of view (HFOV) is half of the maximum field of view in the overall optical imaging lens 1. The units for image height, radius of curvature, thickness, and focal length of the optical imaging lens 1 are all millimeters. In this embodiment, EFL = 9.261 mm; EFLA = 7.342 mm; Fno = 3.070 in the first focusing state; Fno = 2.434 in the second focusing state; HFOV = 20.527 degrees in the first focusing state; HFOV = 19.538 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 6.153 mm; focal length fG2 of the rear lens group 82 = -9.444 mm; TTL = 10.553 mm; image height = 3.500 mm.

[0194] Second Embodiment

[0195] Please see Figure 8 This illustrates a second embodiment of the optical imaging lens 1 of the present invention. Note that, starting with the second embodiment, for the sake of simplicity and clarity in the drawings, only the optical axis regions and circumferential regions of each lens with different surface shapes from those of the first embodiment are specifically marked on the drawings. The optical axis regions and circumferential regions with the same surface shapes as those of the lenses in the first embodiment, such as concave or convex surfaces, are not separately marked. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the second embodiment, please refer to... Figure 9A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 9B For the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 9C For distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 9D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 9E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 9F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 9G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 9H The design of the second embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the second lens 20 has a negative refractive index, the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave, the circumferential region 34 of the object-side surface 31 of the third lens 30 is convex, and the optical axis region 56 of the image-side surface 52 of the fifth lens 50 is concave.

[0196] Detailed optical data for the second embodiment are as follows: Figure 28 As shown, the aspherical data is as follows Figure 29 As shown. In this embodiment, EFL = 10.022 mm; EFLA = 7.679 mm; Fno = 3.070 in the first focusing state; Fno = 2.352 in the second focusing state; HFOV = 19.734 degrees in the first focusing state; HFOV = 19.582 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 6.381 mm; focal length fG2 of the rear lens group 82 = -8.635 mm; TTL = 11.872 mm; image height = 3.500 mm. In particular: the Fno of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the system length TTL of this embodiment is shorter than that of the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; and the distortion aberration of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment.

[0197] Third Embodiment

[0198] Please see Figure 10 This illustrates a third embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the third embodiment, please refer to... Figure 11A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 11B For the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 11C For distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 11D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 11E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 11F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 11G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 11HThe design of the third embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the second lens 20 has a negative refractive index, the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave, the fourth lens 40 has a positive refractive index, the circumferential region 44 of the object-side surface 41 of the fourth lens 40 is convex, the circumferential region 47 of the image-side surface 42 of the fourth lens 40 is convex, the circumferential region 54 of the object-side surface 51 of the fifth lens 50 is concave, and the optical axis region 56 of the image-side surface 52 of the fifth lens 50 is concave.

[0199] Detailed optical data for the third embodiment are as follows: Figure 30 As shown, the aspherical data is as follows Figure 31 As shown, in this embodiment, EFL = 13.827 mm; EFLA = 9.266 mm; Fno in the first focusing state = 3.070; Fno in the second focusing state = 2.143; HFOV in the first focusing state = 14.132 degrees; HFOV in the second focusing state = 13.823 degrees; focal length of front lens group 81 fG1 = 8.221 mm; focal length of rear lens group 82 fG2 = -9.306 mm; TTL = 14.668 mm; image height = 3.500 mm. In particular: the Fno of the second focusing state in this embodiment is superior to the Fno of the second focusing state in the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to the longitudinal spherical aberration of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the first focusing state in the first embodiment; the distortion aberration of the first focusing state in this embodiment is superior to the distortion aberration of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to the longitudinal spherical aberration of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the second focusing state in the first embodiment.

[0200] Fourth embodiment

[0201] Please see Figure 12 This illustrates a fourth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the fourth embodiment, please refer to... Figure 13A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 13B For the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 13CFor distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 13D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 13E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 13F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 13G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 13H The design of the fourth embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the second lens 20 has a negative refractive index, the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave, the fourth lens 40 has a positive refractive index, the circumferential region 44 of the object-side surface 41 of the fourth lens 40 is convex, the circumferential region 54 of the object-side surface 51 of the fifth lens 50 is concave, the optical axis region 56 of the image-side surface 52 of the fifth lens 50 is concave, and the sixth lens 60 has a negative refractive index.

[0202] Detailed optical data for the fourth embodiment are as follows: Figure 32 As shown, the aspherical data is as follows Figure 33 As shown. In this embodiment, EFL = 14.683 mm; EFLA = 9.563 mm; Fno = 3.070 in the first focusing state; Fno = 2.025 in the second focusing state; HFOV = 13.255 degrees in the first focusing state; HFOV = 12.829 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 8.460 mm; focal length fG2 of the rear lens group 82 = -8.977 mm; TTL = 14.890 mm; image height = 3.500 mm. In particular: the Fno of the second focusing state in this embodiment is superior to the Fno of the second focusing state in the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to the longitudinal spherical aberration of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the first focusing state in the first embodiment; the distortion aberration of the first focusing state in this embodiment is superior to the distortion aberration of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to the longitudinal spherical aberration of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the second focusing state in the first embodiment.

[0203] Fifth Embodiment

[0204] Please see Figure 14 This illustrates a fifth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the fifth embodiment, please refer to... Figure 15A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 15B For the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 15C For distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 15D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 15E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 15F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 15G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 15H The design of the fifth embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the second lens 20 has a negative refractive index, the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave, the fourth lens 40 has a positive refractive index, the circumferential region 44 of the object-side surface 41 of the fourth lens 40 is convex, the circumferential region 54 of the object-side surface 51 of the fifth lens 50 is concave, the optical axis region 56 of the image-side surface 52 of the fifth lens 50 is concave, and the sixth lens 60 has a negative refractive index.

[0205] Detailed optical data for the fifth embodiment are as follows: Figure 34 As shown, the aspherical data is as follows Figure 35As shown, in this embodiment, EFL = 13.936 mm; EFLA = 9.071 mm; Fno = 3.070 in the first focusing state; Fno = 2.053 in the second focusing state; HFOV = 13.965 degrees in the first focusing state; HFOV = 13.688 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 8.380 mm; focal length fG2 of the rear lens group 82 = -9.187 mm; TTL = 14.511 mm; image height = 3.500 mm. In particular: the Fno of the second focusing state in this embodiment is superior to the Fno of the second focusing state in the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to the longitudinal spherical aberration of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the first focusing state in the first embodiment; the distortion aberration of the first focusing state in this embodiment is superior to the distortion aberration of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to the longitudinal spherical aberration of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the second focusing state in the first embodiment.

[0206] Sixth Embodiment

[0207] Please see Figure 16 This illustrates a sixth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the sixth embodiment, please refer to... Figure 17A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 17B For the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 17C For distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 17D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 17E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 17F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 17G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 17HThe design of the sixth embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the front lens group 81 includes a first lens 10, a second lens 20, a third lens 30, and a fourth lens 40, and the rear lens group 82 includes a fifth lens 50 and a sixth lens 60. The second lens 20 has a negative refractive index, and the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave. The third lens 30 has a negative refractive index, and the optical axis region 36 of the image-side surface 32 of the third lens 30 is concave. The circumferential region 37 of the image-side surface 32 of the third lens 30 is concave. The fourth lens 40 has a positive refractive index, and the optical axis region 43 of the object-side surface 41 of the fourth lens 40 is convex. The circumferential region 44 of the object-side surface 41 of the fourth lens 40 is convex. The circumferential region 47 of the image-side surface 42 of the fourth lens 40 is convex. The fifth lens 50 has a positive refractive index, the sixth lens 60 has a negative refractive index, and the optical axis region 63 of the object-side surface 61 of the sixth lens 60 is concave.

[0208] Detailed optical data for the sixth embodiment are as follows: Figure 36 As shown, the aspherical data is as follows Figure 37 As shown, in this embodiment, EFL = 12.910 mm; EFLA = 8.696 mm; Fno = 3.070 in the first focusing state; Fno = 2.118 in the second focusing state; HFOV = 15.167 degrees in the first focusing state; HFOV = 15.198 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 7.735 mm; focal length fG2 of the rear lens group 82 = -8.328 mm; TTL = 13.997 mm; image height = 3.500 mm. The Fno of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the distortion aberration of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the distortion aberration of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment.

[0209] Please see Figure 18 This illustrates a seventh embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the seventh embodiment, please refer to... Figure 19A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 19B For the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 19C For distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 19D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 19E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 19F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 19G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 19H The design of the seventh embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the front lens group 81 includes a first lens 10, a second lens 20, a third lens 30, and a fourth lens 40, and the rear lens group 82 includes a fifth lens 50 and a sixth lens 60. The second lens 20 has a negative refractive index, and the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave. The fourth lens 40 has a positive refractive index, and the circumferential region 47 of the image-side surface 42 of the fourth lens 40 is convex. The fifth lens 50 has a positive refractive index, the sixth lens 60 has a negative refractive index, and the optical axis region 63 of the object-side surface 61 of the sixth lens 60 is concave.

[0210] Detailed optical data for the seventh embodiment are as follows: Figure 38 As shown, the aspherical data is as follows Figure 39As shown, in this embodiment, EFL = 14.138 mm; EFLA = 9.052 mm; Fno = 3.070 in the first focusing state; Fno = 2.009 in the second focusing state; HFOV = 13.811 degrees in the first focusing state; HFOV = 13.831 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 8.369 mm; focal length fG2 of the rear lens group 82 = -8.544 mm; TTL = 14.693 mm; image height = 3.500 mm. The Fno of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the distortion aberration of the first focusing state in this embodiment is superior to that of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to that of the second focusing state in the first embodiment.

[0211] Eighth embodiment

[0212] Please see Figure 20 This illustrates an eighth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the eighth embodiment, please refer to... Figure 21A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 21B For the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 21C For distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 21D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 21E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 21F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 21G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 21HThe design of the eighth embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the front lens group 81 includes a first lens 10, a second lens 20, a third lens 30, and a fourth lens 40, and the rear lens group 82 includes a fifth lens 50 and a sixth lens 60. The second lens 20 has a negative refractive index, and the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave. The fourth lens 40 has a positive refractive index, and the circumferential region 47 of the image-side surface 42 of the fourth lens 40 is convex. The fifth lens 50 has a positive refractive index, the sixth lens 60 has a negative refractive index, and the optical axis region 63 of the object-side surface 61 of the sixth lens 60 is concave.

[0213] Detailed optical data for the eighth embodiment are as follows: Figure 40 As shown, the aspherical data is as follows Figure 41 As shown, in this embodiment, EFL = 13.496 mm; EFLA = 8.844 mm; Fno = 3.070 in the first focusing state; Fno = 2.021 in the second focusing state; HFOV = 14.396 degrees in the first focusing state; HFOV = 14.464 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 8.134 mm; focal length fG2 of the rear lens group 82 = -8.712 mm; TTL = 14.055 mm; image height = 3.500 mm. In particular: the Fno of the second focusing state in this embodiment is superior to the Fno of the second focusing state in the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to the longitudinal spherical aberration of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the first focusing state in the first embodiment; the distortion aberration of the first focusing state in this embodiment is superior to the distortion aberration of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to the longitudinal spherical aberration of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the second focusing state in the first embodiment.

[0214] Ninth Embodiment

[0215] Please see Figure 22 This illustrates a ninth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the ninth embodiment, please refer to... Figure 23A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 23BFor the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 23C For distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 23D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 23E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 23F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 23G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 23H The design of the ninth embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the front lens group 81 includes a first lens 10, a second lens 20, a third lens 30, and a fourth lens 40, and the rear lens group 82 includes a fifth lens 50 and a sixth lens 60. The optical axis region 16 of the image-side surface 12 of the first lens 10 is convex, the circumferential region 17 of the image-side surface 12 of the first lens 10 is convex, the second lens 20 has a negative refractive index, the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave, the fourth lens 40 has a positive refractive index, the circumferential region 47 of the image-side surface 42 of the fourth lens 40 is convex, and the sixth lens 60 has a negative refractive index.

[0216] Detailed optical data for the ninth embodiment are as follows: Figure 42 As shown, the aspherical data is as follows Figure 43As shown, in this embodiment, EFL = 11.624 mm; EFLA = 8.463 mm; Fno = 3.070 in the first focusing state; Fno = 2.235 in the second focusing state; HFOV = 16.508 degrees in the first focusing state; HFOV = 17.386 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 7.208 mm; focal length fG2 of the rear lens group 82 = -8.656 mm; TTL = 16.330 mm; image height = 3.500 mm. In particular: the Fno of the second focusing state in this embodiment is superior to the Fno of the second focusing state in the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to the longitudinal spherical aberration of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the first focusing state in the first embodiment; the distortion aberration of the first focusing state in this embodiment is superior to the distortion aberration of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to the longitudinal spherical aberration of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the second focusing state in the first embodiment.

[0217] Tenth Embodiment

[0218] Please see Figure 24 This example illustrates a tenth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 4 in the first focusing state of the tenth embodiment, please refer to... Figure 25A For the field curvature aberration in the sagittal direction of the first focusing state, please refer to [reference needed]. Figure 25B For the field curvature aberration in the meridional direction during the first focusing state, please refer to [reference needed]. Figure 25C For distortion and aberration in the first focusing state, please refer to [reference needed]. Figure 25D For the longitudinal spherical aberration on image plane 4 in the second focusing state, please refer to... Figure 25E For the field curvature aberration in the sagittal direction of the second focusing state, please refer to [reference needed]. Figure 25F For the field curvature aberration in the meridional direction during the second focusing state, please refer to [reference needed]. Figure 25G For distortion and aberration in the second focusing state, please refer to [reference needed]. Figure 25HThe design of the tenth embodiment is similar to that of the first embodiment, except that the lens refractive index, lens radius of curvature, lens thickness, lens aspherical coefficient, or back focal length are different. Furthermore, in this embodiment, the front lens group 81 includes a first lens 10, a second lens 20, a third lens 30, and a fourth lens 40, and the rear lens group 82 includes a fifth lens 50 and a sixth lens 60. The second lens 20 has a negative refractive index, and the circumferential region 27 of the image-side surface 22 of the second lens 20 is concave. The fourth lens 40 has a positive refractive index, and the circumferential region 47 of the image-side surface 42 of the fourth lens 40 is convex. The fifth lens 50 has a positive refractive index, the sixth lens 60 has a negative refractive index, and the optical axis region 63 of the object-side surface 61 of the sixth lens 60 is concave.

[0219] Detailed optical data for the tenth embodiment are as follows: Figure 44 As shown, the aspherical data is as follows Figure 45 As shown, in this embodiment, EFL = 13.809 mm; EFLA = 8.963 mm; Fno = 3.070 in the first focusing state; Fno = 2.029 in the second focusing state; HFOV = 14.083 degrees in the first focusing state; HFOV = 14.128 degrees in the second focusing state; focal length fG1 of the front lens group 81 = 8.235 mm; focal length fG2 of the rear lens group 82 = -8.649 mm; TTL = 14.241 mm; image height = 3.500 mm. In particular: the Fno of the second focusing state in this embodiment is superior to the Fno of the second focusing state in the first embodiment; the longitudinal spherical aberration of the first focusing state in this embodiment is superior to the longitudinal spherical aberration of the first focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the first focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the first focusing state in the first embodiment; the field curvature aberration in the meridional direction of the first focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the first focusing state in the first embodiment; the distortion aberration of the first focusing state in this embodiment is superior to the distortion aberration of the first focusing state in the first embodiment; the longitudinal spherical aberration of the second focusing state in this embodiment is superior to the longitudinal spherical aberration of the second focusing state in the first embodiment; the field curvature aberration in the sagittal direction of the second focusing state in this embodiment is superior to the field curvature aberration in the sagittal direction of the second focusing state in the first embodiment; the field curvature aberration in the meridional direction of the second focusing state in this embodiment is superior to the field curvature aberration in the meridional direction of the second focusing state in the first embodiment.

[0220] In addition, the key parameters of the first or second focusing state in each embodiment are respectively compiled in Figure 46 , Figure 47 , Figure 48 and Figure 49 Listed in.

[0221] Various embodiments of the present invention provide a six-element optical imaging lens that is lightweight, compact, has excellent imaging quality, good optical performance, enables focusing on the subject at infinity and macro distances, and is technically feasible. For example, by satisfying the following lens surface shape and lens refractive index or parameters, the imaging quality of the optical imaging lens 1 of the present invention can be effectively optimized, and the corresponding beneficial effects can be achieved:

[0222] 1. When the first lens 10 has a positive refractive index, it can effectively gather incident light rays from different angles. The concave circumferential region 57 of the image-side surface 52 of the fifth lens 50, the concave optical axis region 66 of the image-side surface 62 of the sixth lens 60, and the convex circumferential region 67 of the image-side surface 62 of the sixth lens 60 all contribute to improving the edge aberrations of the imaging surface 4. When the subject moves from infinity to macro or from macro to infinity, the optical imaging lens 1 can achieve focusing by forming a first focusing state and a second focusing state. When the effective focal length of these two focusing states meets the ratio limit of (TTL*ΔHFOV) / ΔG≦19.500 degrees, in addition to controlling the size of the optical imaging lens, good image quality can be maintained during focusing. The optimal range for (TTL*ΔHFOV) / ΔG is 0.100 degrees≦(TTL*ΔHFOV) / ΔG≦19.500 degrees.

[0223] 2. When the first lens 10 has a positive refractive index, and the optical axis region 23 of the object-side surface 21 of the second lens 20 is convex or the circumferential region 24 of the object-side surface 21 of the second lens 20 is convex, incident light rays at different angles can be effectively collected. Furthermore, by designing a surface combination where the optical axis region 53 of the object-side surface 51 of the fifth lens 50 is concave, the circumferential region 57 of the image-side surface 52 of the fifth lens 50 is concave, and the circumferential region 67 of the image-side surface 62 of the sixth lens 60 is convex, the edge aberrations of the imaging surface 4 can be effectively improved. When the subject moves from infinity to macro or from macro to infinity, the rear lens group 82 moves along the optical axis I, allowing the optical imaging lens 1 to achieve a first focusing state and a second focusing state to achieve focusing. When the effective focal length of the two focusing states meets the ratio limit of (TTL*ΔHFOV) / ΔG≦19.500 degrees, in addition to controlling the size of the optical imaging lens 1, it can also maintain good image quality during focusing.

[0224] 3. When the first lens 10 has a positive refractive index, it can effectively gather incident light rays from different angles. When the optical axis region 66 of the image-side surface 62 of the sixth lens 60 is concave and the circumferential region 67 of the image-side surface 62 of the sixth lens 60 is convex, aberrations can be effectively improved. When the subject moves from infinity to macro or from macro to infinity, the rear lens group 82 moves along the optical axis I, allowing the optical imaging lens 1 to achieve a first focusing state and a second focusing state for focusing. When the effective focal length of these two focusing states meets the ratio limit of EFL / EFLA≧1.300, in addition to controlling the size of the optical imaging lens 1, good image quality can be maintained during focusing. If one of the following conditions is met: (a) the third lens 30 has a positive refractive index, or (b) the optical axis region 36 of the image side surface 32 of the third lens 30 is convex, or (c) the circumferential region 57 of the image side surface 52 of the fifth lens 50 is concave, it is more conducive to the focusing of imaging light rays, and while taking into account imaging quality, it can also help maintain the system length TTL of the optical imaging lens 1.

[0225] 4. When the second lens 20 has a negative refractive index, it can correct the distortion and spherical aberration caused by the first lens 10. Combined with the fact that the optical axis region 66 of the image-side surface 62 of the sixth lens 60 is concave and the circumferential region 67 of the image-side surface 62 of the sixth lens 60 is convex, it can effectively improve the edge aberrations of the imaging surface 4. When the subject moves from infinity to macro or from macro to infinity, the rear lens group 82 moves along the optical axis I, allowing the optical imaging lens 1 to achieve a first focusing state and a second focusing state for focusing. When the effective focal length of these two focusing states meets the ratio limit of EFL / EFLA≧1.300, in addition to controlling the size of the optical imaging lens 1, it can also maintain good image quality during focusing.

[0226] 5. Continuing from 1 to 4, if the front lens group 81 of the above invention is further made to have a positive refractive index and the rear lens group 82 has a negative refractive index, the positive refractive index of the front lens group 81 converges the light rays, and the movement of the rear lens group 82 with a negative refractive index along the optical axis I enables subjects at different object distances to have good image quality. Furthermore, by moving the rear lens group 82 along the optical axis I, the optical imaging lens 1 can achieve focusing while maintaining a fixed volume.

[0227] 6. The first focusing state and the second focusing state formed by the optical imaging lens 1 of the present invention can enable the subject to be successfully focused and imaged when it is moved from infinity to a distance of 40mm to 55mm in front of the optical lens group, and have good image quality.

[0228] 7. When the lens material meets the following limitations, it can effectively suppress chromatic aberration and spherical aberration generated during focusing at different object distances, which is beneficial for the optical imaging lens 1 to have good resolution:

[0229] (υ4+υ5) / υ6≦1.700, with a better limit of 1.300≦(υ4+υ5) / υ6≦1.700.

[0230] 8. When the first focusing state and the second focusing state of the optical imaging lens 1 meet the following ratio limits, it can be ensured that the optical imaging lens 1 can maintain good imaging quality in both focusing states.

[0231] EFL / EFLA ≥ 1.300, with a preferred limit of 1.300 ≤ EFL / EFLA ≤ 1.700.

[0232] 9. To ensure image quality, reduce lens size, and consider ease of manufacturing, it is desirable to appropriately shorten or maintain the air gap between lenses or the lens thickness at a certain ratio. When the following conditional numerical limits are met, the embodiments of the present invention can have a better configuration.

[0233] TTL / (AAG+BFL)≦1.900, with a preferred limit of 1.500≦TTL / (AAG+BFL)≦1.900;

[0234] (T1+G12+T2) / T6≦3.300, with a preferred limit of 0.700≦(T1+G12+T2) / T6≦3.300;

[0235] ALT / (G34+T4)≦5.800, with a preferred limit of 1.400≦ALT / (G34+T4)≦5.800;

[0236] AAG / (T3+T5)≦3.000, with a preferred limit of 0.600≦AAG / (T3+T5)≦3.000;

[0237] (T2+G23+T3) / G56≦7.000, with a preferred limit of 2.500≦(T2+G23+T3) / G56≦7.000;

[0238] T6 / Tmin≦3.000, with a preferred limit of 1.200≦T6 / Tmin≦4.000;

[0239] TTL / (T2+G23)≧10.000, with a preferred limit of 9.700≦TTL / (T2+G23)≦17.000;

[0240] (G34+T4+G45) / T6≦4.300, with a preferred limit of 1.000≦(G34+T4+G45) / T6≦4.300;

[0241] TL / (G23+T4)≧5.000, with a preferred limit of 5.000≦TL / (G23+T4)≦12.500;

[0242] AAG / T2 ≥ 3.500, with a preferred limit of 3.500 ≤ AAG / T2 ≤ 13.000;

[0243] T1 / (G12+G23)≧1.000, with a preferred limit of 1.000≦T1 / (G12+G23)≦4.800;

[0244] TTL / BFL ≤ 5.500, with a preferred limit of 2.200 ≤ TTL / BFL ≤ 5.500;

[0245] T6 / G56≦3.400, with a preferred limit of 1.300≦T6 / G56≦3.400;

[0246] EFL / (T2+G23)≧7.000, with a preferred limit of 5.000≦EFL / (T2+G23)≦16.500;

[0247] ALT / Tmin ≤ 17.000, with a preferred limit of 7.200 ≤ ALT / Tmin ≤ 17.000;

[0248] (T3+T4) / (G23+T5)≧1.000, with a preferred limit of 1.000≦(T3+T4) / (G23+T5)≦3.500;

[0249] TTL / ALT ≤ 2.800, with a preferred limit of 1.800 ≤ TTL / ALT ≤ 2.800;

[0250] TTL / Tavg≦15.000, with a preferred limit of 11.000≦TTL / Tavg≦15.000;

[0251] TL / (Tmax+Tmin)≦7.500, with a better limit of 3.800≦TL / (Tmax+Tmin)≦7.500;

[0252] BFL / Tmax≦4.000, with a preferred limit of 1.000≦BFL / Tmax≦4.000.

[0253] In addition, any combination of parameters in the alternative embodiments can be selected to increase lens constraints, thereby facilitating lens design with the same architecture as the present invention.

[0254] Given the unpredictability of optical system design, under the framework of this invention, meeting the above-mentioned conditions can better improve the imaging quality, reduce the size, or improve the assembly yield of this invention, thereby overcoming the shortcomings of prior art. Furthermore, the use of plastic material for the lens in the embodiments of this invention can further reduce lens weight and save costs.

[0255] The numerical ranges, including the maximum and minimum values, obtained from the combined proportional relationships of the optical parameters disclosed in the various embodiments of the present invention can all be implemented accordingly.

[0256] The embodiments of this invention disclose optical parameters including, but not limited to, focal length, lens thickness, Abbe number, etc. For example, the present invention discloses an optical parameter A and an optical parameter B in various embodiments. The specific explanations of the ranges covered by these optical parameters, the comparison relationships between the optical parameters, and the conditional ranges covered by the multiple embodiments are as follows:

[0257] (1) The range covered by the optical parameters, for example: α2≦A≦α1 or β2≦B≦β1, where α1 is the maximum value of optical parameter A in multiple embodiments, α2 is the minimum value of optical parameter A in multiple embodiments, β1 is the maximum value of optical parameter B in multiple embodiments, and β2 is the minimum value of optical parameter B in multiple embodiments.

[0258] (2) Comparison of optical parameters, for example: A is greater than B or A is less than B.

[0259] (3) The conditional range covered by multiple embodiments, specifically, the combination or proportional relationships obtained by possible calculations of a plurality of optical parameters of the same embodiment, defined as E. E may be, for example: A+B or AB or A / B or A*B or (A*B). 1 / 2 E satisfies the condition E≦γ1 or E≧γ2 or γ2≦E≦γ1, where γ1 and γ2 are the values ​​obtained by calculation of optical parameter A and optical parameter B in the same embodiment, and γ1 is the maximum value in multiple embodiments of the present invention, and γ2 is the minimum value in multiple embodiments of the present invention.

[0260] The ranges covered by the aforementioned optical parameters, the comparative relationships between the optical parameters, and the maximum, minimum, and numerical ranges within these conditions are all features upon which the present invention can be implemented, and all fall within the scope disclosed in the present invention. The above are merely illustrative examples and should not be construed as limiting.

[0261] All embodiments of the present invention are feasible, and some feature combinations can be extracted from the same embodiment. Compared with the prior art, these feature combinations can achieve unexpected effects. These feature combinations include, but are not limited to, combinations of features such as surface shape, refractive index, and conditional expression. The disclosure of the embodiments of the present invention is to illustrate the specific embodiments of the principles of the present invention, and should not be limited to the disclosed embodiments. Furthermore, the embodiments and their accompanying drawings are only for illustrative purposes and are not limited thereto.

[0262] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be included in the scope of 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, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the first lens to the sixth lens comprises an object side surface facing the object side and passing an imaging light ray, and an image side surface facing the image side and passing the imaging light ray, wherein, When a subject moves from infinity to a macro distance, the optical imaging lens correspondingly forms a first focusing state and a second focusing state to achieve focusing, characterized in that: The first lens has a positive refractive index; A circular region on the image side of the fifth lens is concave; and The optical axis region of the image side surface of the sixth lens is concave, and the circumferential region of the image side surface of the sixth lens is convex. When the lens surface has at least one transition point, the tangent of which is perpendicular to the optical axis, the circumferential region is defined as the area radially outward from the transition point furthest from the optical axis to an optical boundary; when the lens surface has no transition point, the circumferential region is defined as 50% to 100% of the distance from the optical axis to the optical boundary of the lens surface. The optical imaging lens has only six lenses. TTL is defined as the distance from the object-side surface of the first lens to an imaging surface on the optical axis. ΔHFOV is defined as the absolute value of the change in half the field of view of the optical imaging lens between the first and second focusing states. ΔG is defined as the absolute value of the total change in air gaps of the optical imaging lens between the first and second focusing states, and satisfies the following condition: 0.100 degrees ≤ TTL ΔHFOV / ΔG≦19.500 degrees.

2. An optical imaging lens, comprising, in sequence along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein each of the first to sixth lenses includes an object-side surface facing the object side and through which an imaging ray passes, and an image-side surface facing the image side and through which the imaging ray passes, wherein... When a subject moves from infinity to a macro distance, the optical imaging lens correspondingly forms a first focusing state and a second focusing state to achieve focusing, characterized in that: The first lens has a positive refractive index; The optical axis region on the side of the second lens is convex. The fifth lens has a concave optical axis region on the object side and a concave circumferential region on the image side; and A circumferential region on the image side of the sixth lens is convex. When the lens surface has at least one transition point, the tangent of which is perpendicular to the optical axis, the circumferential region is defined as the area radially outward from the transition point furthest from the optical axis to an optical boundary; when the lens surface has no transition point, the circumferential region is defined as 50% to 100% of the distance from the optical axis to the optical boundary of the lens surface. The optical imaging lens has only six lenses. TTL is defined as the distance from the object-side surface of the first lens to an imaging surface on the optical axis. ΔHFOV is defined as the absolute value of the change in half the field of view of the optical imaging lens between the first and second focusing states. ΔG is defined as the absolute value of the total change in air gaps of the optical imaging lens between the first and second focusing states, and satisfies the following condition: 0.100 degrees ≤ TTL ΔHFOV / ΔG≦19.500 degrees.

3. An optical imaging lens, comprising, in sequence along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein each of the first to sixth lenses includes an object-side surface facing the object side and through which an imaging ray passes, and an image-side surface facing the image side and through which the imaging ray passes, wherein... When a subject moves from infinity to a macro distance, the optical imaging lens correspondingly forms a first focusing state and a second focusing state to achieve focusing, characterized in that: The first lens has a positive refractive index; A circumferential region on the side of the object of the second lens is convex. The fifth lens has a concave optical axis region on the object side and a concave circumferential region on the image side; and A circumferential region on the image side of the sixth lens is convex. When the lens surface has at least one transition point, the tangent of which is perpendicular to the optical axis, the circumferential region is defined as the area radially outward from the transition point furthest from the optical axis to an optical boundary; when the lens surface has no transition point, the circumferential region is defined as 50% to 100% of the distance from the optical axis to the optical boundary of the lens surface. The optical imaging lens has only six lenses. TTL is defined as the distance from the object-side surface of the first lens to an imaging surface on the optical axis. ΔHFOV is defined as the absolute value of the change in half the field of view of the optical imaging lens between the first and second focusing states. ΔG is defined as the absolute value of the total change in air gaps of the optical imaging lens between the first and second focusing states, and satisfies the following condition: 0.100 degrees ≤ TTL ΔHFOV / ΔG≦19.500 degrees.

4. The optical imaging lens according to any one of claims 1-3, characterized in that, AAG is defined as the sum of the five air gaps on the optical axis from the first lens to the sixth lens, BFL is defined as the distance from the image side of the sixth lens to the imaging surface on the optical axis, and the optical imaging lens satisfies the following condition: TTL / (AAG+BFL)≦1.

900.

5. The optical imaging lens according to any one of claims 1-3, characterized in that, T1 is defined as the thickness of the first lens on the optical axis, T2 is defined as the thickness of the second lens on the optical axis, T6 is defined as the thickness of the sixth lens on the optical axis, G12 is defined as the air gap between the first lens and the second lens on the optical axis, and the optical imaging lens satisfies the following condition: (T1+G12+T2) / T6≦3.

300.

6. The optical imaging lens according to any one of claims 1-3, characterized in that, ALT is defined as the sum of the thicknesses of the six lenses from the first lens to the sixth lens on the optical axis, T4 is defined as the thickness of the fourth lens on the optical axis, G34 is defined as the air gap between the third lens and the fourth lens on the optical axis, and the optical imaging lens satisfies the following condition: ALT / (G34+T4)≦5.

800.

7. The optical imaging lens according to any one of claims 1-3, characterized in that, AAG is defined as the sum of the five air gaps on the optical axis from the first lens to the sixth lens, T3 is defined as the thickness of the third lens on the optical axis, T5 is defined as the thickness of the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: AAG / (T3+T5)≦3.

000.

8. The optical imaging lens according to any one of claims 1-3, characterized in that, T2 is defined as the thickness of the second lens on the optical axis, T3 is defined as the thickness of the third lens on the optical axis, G23 is defined as the air gap between the second and third lenses on the optical axis, and G56 is defined as the air gap between the fifth and sixth lenses on the optical axis. The optical imaging lens satisfies the following condition: (T2+G23+T3) / G56≦7.

000.

9. The optical imaging lens according to any one of claims 1-3, characterized in that, T6 is defined as the thickness of the sixth lens on the optical axis, and Tmin is defined as the minimum thickness of the six lenses from the first lens to the sixth lens on the optical axis. The optical imaging lens satisfies the following condition: T6 / Tmin≦3.

000.

10. The optical imaging lens according to any one of claims 1-3, characterized in that, T2 is defined as the thickness of the second lens on the optical axis, G23 is defined as the air gap between the second lens and the third lens on the optical axis, and the optical imaging lens satisfies the following condition: TTL / (T2+G23)≧10.

000.

11. The optical imaging lens according to any one of claims 1-3, characterized in that, T4 is defined as the thickness of the fourth lens on the optical axis, T6 is defined as the thickness of the sixth lens on the optical axis, G34 is defined as the air gap between the third and fourth lenses on the optical axis, G45 is defined as the air gap between the fourth and fifth lenses on the optical axis, and the optical imaging lens satisfies the following condition: (G34+T4+G45) / T6≦4.

300.

12. The optical imaging lens according to any one of claims 1-3, characterized in that, TL is defined as the distance on the optical axis from the object side of the first lens to the image side of the sixth lens; T4 is defined as the thickness of the fourth lens on the optical axis; G23 is defined as the air gap between the second lens and the third lens on the optical axis; and the optical imaging lens satisfies the following condition: TL / (G23+T4)≧5.

000.

13. The optical imaging lens according to any one of claims 1-3, characterized in that, AAG is defined as the sum of the five air gaps on the optical axis from the first lens to the sixth lens, T2 is defined as the thickness of the second lens on the optical axis, and the optical imaging lens satisfies the following condition: AAG / T2≧3.

500.

14. The optical imaging lens according to any one of claims 1-3, characterized in that, T1 is defined as the thickness of the first lens on the optical axis, G12 is defined as the air gap between the first lens and the second lens on the optical axis, G23 is defined as the air gap between the second lens and the third lens on the optical axis, and the optical imaging lens satisfies the following condition: T1 / (G12+G23)≧1.

000.

15. The optical imaging lens according to any one of claims 1-3, characterized in that, υ4 is defined as the Abbe number of the fourth lens, υ5 is defined as the Abbe number of the fifth lens, and υ6 is defined as the Abbe number of the sixth lens. The optical imaging lens satisfies the following condition: (υ4+υ5) / υ6≦1.

700.

16. The optical imaging lens according to any one of claims 1-3, characterized in that, BFL is defined as the distance from the image side of the sixth lens to the imaging surface on the optical axis, and the optical imaging lens satisfies the following condition: TTL / BFL≦5.

500.

17. The optical imaging lens according to any one of claims 1-3, characterized in that, T6 is defined as the thickness of the sixth lens on the optical axis, G56 is defined as the air gap between the fifth and sixth lenses on the optical axis, and the optical imaging lens satisfies the following condition: T6 / G56≦3.

400.

18. The optical imaging lens according to any one of claims 1-3, characterized in that, EFL is the effective focal length of the first focusing state, T2 is defined as the thickness of the second lens on the optical axis, G23 is defined as the air gap between the second lens and the third lens on the optical axis, and the optical imaging lens satisfies the following condition: EFL / (T2+G23)≧7.

000.

19. The optical imaging lens according to any one of claims 1-3, characterized in that, ALT is defined as the sum of the thicknesses of the six lenses from the first lens to the sixth lens on the optical axis, and Tmin is defined as the minimum thickness of the six lenses from the first lens to the sixth lens on the optical axis. The optical imaging lens satisfies the following condition: ALT / Tmin ≦ 17.

000.

20. The optical imaging lens according to any one of claims 1-3, characterized in that, T3 is defined as the thickness of the third lens on the optical axis, T4 is defined as the thickness of the fourth lens on the optical axis, T5 is defined as the thickness of the fifth lens on the optical axis, G23 is defined as the air gap between the second lens and the third lens on the optical axis, and the optical imaging lens satisfies the following condition: (T3+T4) / (G23+T5)≧1.000.

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