Optical imaging lens

Abstract

An optical imaging lens sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens along an optical axis from an object side to an image side, and the first lens to the sixth lens each include an object side surface facing the object side and passing the imaging light and an image side surface facing the image side and passing the imaging light. The optical imaging lens has only six lenses and satisfies a condition formula TTL / (T1+G12)≦9.000. It has the advantages of a larger field of view angle, a shortened system length of the optical imaging lens and a reduced aperture value of the optical imaging lens.

Description

[0001] This invention patent application is a divisional application. The original application number is 202010504465.6, the application date is June 5, 2020, and the invention title is: Optical Imaging Lens. Technical Field

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

[0003] In recent years, optical imaging lenses have continued to evolve. In addition to requiring optical imaging lenses to be thin, light and small, it is also becoming increasingly important to expand the field of view of optical imaging lenses and improve the imaging quality such as lens aberration and chromatic aberration.

[0004] However, in response to demand, if the distance between the object side of the first lens and the imaging surface on the optical axis increases, it will be detrimental to the thinning of mobile phones and digital cameras. Therefore, providing a thin, light, compact optical imaging lens with a large field of view and good imaging quality has always been the design development goal. Summary of the Invention

[0005] The present invention provides an optical imaging lens that has a large field of view while simultaneously shortening the system length of the optical imaging lens and reducing the aperture value of the optical imaging lens.

[0006] This invention provides an optical imaging lens, comprising, sequentially from the object side to the 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. Each of the first to sixth lenses includes 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 first lens has a negative refractive index. The object-side surface of the third lens has a convex optical axis region, a concave circular region on the object side, and a concave circular region on the image side. The object-side surface of the fourth lens has a convex optical axis region. The fifth lens has a negative refractive index. The object-side surface of the sixth lens has a convex optical axis region. The optical imaging lens has only six lenses and satisfies the following condition: TTL / (T1+G12)≦9.000, where TTL is the distance from the object-side surface of the first lens to an imaging surface along the optical axis, T1 is the thickness of the first lens along the optical axis, and G12 is the air gap between the first lens and the second lens along the optical axis.

[0007] The present invention further provides an optical imaging lens, comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein each of the first to sixth lenses includes 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 first lens has a negative refractive index, and an optical axis region of the object-side surface of the first lens is convex; the third lens has a negative refractive index, and an optical axis region of the object-side surface of the third lens is convex and The object-side surface of the third lens has a concave circumferential region; the object-side surface of the fourth lens has a convex optical axis region; the fifth lens has a negative refractive index; and the object-side surface of the sixth lens has a convex optical axis region. The optical imaging lens has only six lenses and satisfies the following condition: TTL / (T1+G12)≦9.000, where TTL is the distance from the object-side surface of the first lens to an imaging plane on the optical axis, T1 is the thickness of the first lens on the optical axis, and G12 is the air gap between the first lens and the second lens on the optical axis.

[0008] The present invention further provides an optical imaging lens, comprising, sequentially from the object side to the 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. Each of the first to sixth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The first lens has a negative refractive index, and an optical axis region on its object-side surface is convex. A circumferential region on the object-side surface of the second lens is convex. The third lens has a negative refractive index, and an optical axis region on its object-side surface is convex. The fourth lens has a positive refractive index, and an optical axis region on its object-side surface is convex, as is a circumferential region on its image-side surface. The sixth lens has an optical axis region on its object-side surface. The optical imaging lens comprises only six lenses, satisfying the following condition: TTL / (T 1+G12)≦9.000; and V4+V5≦80.000, where TTL is the distance from the object side of the first lens to an imaging plane on the optical axis, T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens.

[0009] The present invention further provides an optical imaging lens, comprising, sequentially from the object side to the 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. Each of the first to sixth lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The first lens has a negative refractive index, and a circumferential region of its object-side surface is convex. A circumferential region of the object-side surface of the second lens is convex. The third lens has a negative refractive index, and a region along the optical axis of its object-side surface is convex, while a circumferential region of its image-side surface is concave. The fourth lens has a positive refractive index. The fourth lens has a convex optical axis region on its object side, a convex optical axis region on its image side, and a convex circular region on its image side. The sixth lens has a convex optical axis region on its object side. The optical imaging lens has only six lenses and satisfies the following conditions: TTL / (T1+G12)≦9.000; and V4+V5≦80.000, where TTL is the distance on the optical axis from the object side of the first lens to an imaging plane, T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first and second lenses on the optical axis, V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens.

[0010] The present invention further provides 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 imaging light passes, and an image-side surface facing the image side and through which imaging light passes; the first lens has a negative refractive index; the third lens has a negative refractive index, wherein an optical axis region of the object-side surface of the third lens is convex, and a circumferential region of the image-side surface of the third lens is concave; the fifth lens has a negative refractive index; a circumferential region of the object-side surface of the sixth lens is concave, and an optical axis region of the image-side surface of the sixth lens is concave... The axial region is concave, and the optical imaging lens has only six lenses, satisfying the following conditions: TTL / (T1+G12)≦9.000; and TL / (G12+G23+G34)≧5.100, where TTL is the distance on the optical axis from the object side of the first lens to an imaging surface, T1 is the thickness of the first lens on the optical axis, TL is the distance on the optical axis from the object side of the first lens to the image side of the sixth lens, G12 is the air gap on the optical axis between the first and second lenses, G23 is the air gap on the optical axis between the second and third lenses, and G34 is the air gap on the optical axis between the third and fourth lenses.

[0011] In one embodiment of the present invention, the first lens has a negative refractive index and the circumferential region of its object-side surface is convex; the second lens has a positive refractive index and the circumferential region of its image-side surface is convex; the third lens has a concave circumferential region of its image-side surface; the fifth lens has a negative refractive index and the circumferential region of its image-side surface is convex; the sixth lens has a concave circumferential region of its object-side surface, the optical axis region of its image-side surface is concave, and the circumferential region of its image-side surface is convex; and the optical imaging lens conforms to V4 + V5 ≦ 80.000. Furthermore, among all the lenses of the optical imaging lens (e.g., the first to sixth lenses), the thickest and second thickest lenses are among the first to fourth lenses.

[0012] In one embodiment of the present invention, the first lens has a negative refractive index, the circumferential region of the object-side surface of the first lens is convex, the second lens has a positive refractive index, the circumferential region of the image-side surface of the third lens is concave, the fifth lens has a negative refractive index, 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 convex, and the optical axis region of the image-side surface of the sixth lens is concave, and the optical imaging lens conforms to V4+V5≦80.000. Furthermore, among all the lenses of the optical imaging lens (e.g., the first to the sixth lenses), the thickest and second thickest lenses are among the first to the fourth lenses.

[0013] An optical imaging lens only needs to meet any of the following conditions:

[0014] (G34+T4+G45) / BFL≧1.000,

[0015] L11 t42 / L42t62≧2.400,

[0016] HFOV / Fno≧18.000 degrees,

[0017] (EFL+BFL) / ALT≧0.800

[0018] HFOV / (Tmax+Tmax2)≧20.000 degrees / mm

[0019] (EFL+BFL) / AAG≧2.400,

[0020] ALT / (G12+G45+G56)≧4.000,

[0021] TL / BFL ≤ 4.500

[0022] (G45+EFL) / (T1+T2+T3)≧1.500,

[0023] HFOV / TTL ≥ 9.500 degrees / mm

[0024] (EFL+BFL) / (G12+G45)≦7.200,

[0025] ALT / (G23+T4)≦3.400,

[0026] TTL / (T5+G56+T6)≧5.800

[0027] TTL / (T2+T3+T4)≦4.100.

[0028] Where G45 is the air gap between the fourth and fifth lenses on the optical axis, and G56 is the air gap between the fifth and sixth lenses on the optical axis. T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, and T6 is the thickness of the sixth lens on the optical axis. HFOV is the half-angle of the optical imaging lens, Fno is the aperture value of the optical imaging lens, EFL is the effective focal length of the optical imaging lens, BFL is the distance on the optical axis from the image side of the sixth lens to the imaging plane, ALT is the sum of the thicknesses of the six lenses from the first to the sixth lens on the optical axis, AAG is the sum of the five air gaps on the optical axis from the first to the sixth lens, Tmax is the thickest lens thickness from the first to the sixth lens on the optical axis, Tmax2 is the second thickest lens thickness from the first to the sixth lens on the optical axis, L11t42 is the distance on the optical axis from the object side of the first lens to the image side of the fourth lens, and L42t62 is the distance on the optical axis from the image side of the fourth lens to the image side of the sixth lens.

[0029] Based on the above, the beneficial effects of the optical imaging lens of the embodiments of the present invention are as follows: by satisfying the above-mentioned concave and convex surface arrangement design of the lens, the refractive index condition, and the design that satisfies the above-mentioned conditional formula, the optical imaging lens can have a larger field of view, reduce the area occupied by the optical imaging lens when it is set in the shooting device, and at the same time shorten the length of the optical imaging lens while maintaining good imaging quality. Attached Figure Description

[0030] Figure 1 This is a schematic diagram illustrating the surface structure of a lens.

[0031] Figure 2 It is a schematic diagram illustrating the concave and convex structure of a lens and the intersection of light rays.

[0032] Figure 3 This is a schematic diagram illustrating the surface structure of a lens in Example 1.

[0033] Figure 4 This is a schematic diagram illustrating the surface structure of a lens in Example 2.

[0034] Figure 5 This is a schematic diagram illustrating the surface structure of a lens in Example 3.

[0035] Figure 6 This is a schematic diagram of the optical imaging lens according to the first embodiment of the present invention.

[0036] Figure 7 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the first embodiment.

[0037] Figure 8 This is a detailed optical data table diagram of the optical imaging lens of the first embodiment of the present invention.

[0038] Figure 9 This is a table of aspherical parameters of the optical imaging lens according to the first embodiment of the present invention.

[0039] Figure 10 This is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention.

[0040] Figure 11 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the second embodiment.

[0041] Figure 12 This is a detailed optical data table diagram of the optical imaging lens according to the second embodiment of the present invention.

[0042] Figure 13 This is a table of aspherical parameters of the optical imaging lens according to the second embodiment of the present invention.

[0043] Figure 14 This is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention.

[0044] Figure 15 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the third embodiment.

[0045] Figure 16 This is a detailed optical data table diagram of the optical imaging lens according to the third embodiment of the present invention.

[0046] Figure 17 This is a table of aspherical parameters of the optical imaging lens according to the third embodiment of the present invention.

[0047] Figure 18 This is a schematic diagram of an optical imaging lens according to the fourth embodiment of the present invention.

[0048] Figure 19 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the fourth embodiment.

[0049] Figure 20This is a detailed optical data table diagram of the optical imaging lens according to the fourth embodiment of the present invention.

[0050] Figure 21 This is a table of aspherical parameters of the optical imaging lens according to the fourth embodiment of the present invention.

[0051] Figure 22 This is a schematic diagram of an optical imaging lens according to the fifth embodiment of the present invention.

[0052] Figure 23 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the fifth embodiment.

[0053] Figure 24 This is a detailed optical data table diagram of the optical imaging lens according to the fifth embodiment of the present invention.

[0054] Figure 25 This is a table of aspherical parameters of the optical imaging lens according to the fifth embodiment of the present invention.

[0055] Figure 26 This is a schematic diagram of an optical imaging lens according to the sixth embodiment of the present invention.

[0056] Figure 27 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the sixth embodiment.

[0057] Figure 28 This is a detailed optical data table diagram of the optical imaging lens according to the sixth embodiment of the present invention.

[0058] Figure 29 This is a table of aspherical parameters of the optical imaging lens according to the sixth embodiment of the present invention.

[0059] Figure 30 This is a schematic diagram of an optical imaging lens according to the seventh embodiment of the present invention.

[0060] Figure 31 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the seventh embodiment.

[0061] Figure 32 This is a detailed optical data table diagram of the optical imaging lens according to the seventh embodiment of the present invention.

[0062] Figure 33 This is a table of aspherical parameters of the optical imaging lens according to the seventh embodiment of the present invention.

[0063] Figure 34 This is a schematic diagram of the optical imaging lens according to the eighth embodiment of the present invention.

[0064] Figure 35 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the eighth embodiment.

[0065] Figure 36 This is a detailed optical data table diagram of the optical imaging lens according to the eighth embodiment of the present invention.

[0066] Figure 37 This is a table of aspherical parameters of the optical imaging lens according to the eighth embodiment of the present invention.

[0067] Figure 38 This is a schematic diagram of an optical imaging lens according to the ninth embodiment of the present invention.

[0068] Figure 39 This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the ninth embodiment.

[0069] Figure 40 This is a detailed optical data table diagram of the optical imaging lens according to the ninth embodiment of the present invention.

[0070] Figure 41 This is a table of aspherical parameters of the optical imaging lens according to the ninth embodiment of the present invention.

[0071] Figure 42 and Figure 43 This is a numerical table of important parameters and their relationships of the optical imaging lens of the first to fifth embodiments of the present invention.

[0072] Figure 44 and Figure 45 This is a numerical table showing the important parameters and their relationships of the optical imaging lens in the sixth to ninth embodiments of the present invention. Detailed Implementation

[0073] Before describing the invention in detail, the symbols in the accompanying drawings are clearly explained: 0: aperture; 1: first lens; 2: second lens; 3: third lens; 4: fourth lens; 5: fifth lens; 6: sixth lens; 9: filter; 10: optical imaging lens; 15, 25, 35, 45, 55, 65, 95, 110, 410, 510: object side; 16, 26, 36, 46, 56, 66, 96, 120, 320: image side; 99: imaging plane; 100, 200, 300, 400, 500: lens; 130: assembly part; 151, 161, 251, 261, 35 1,361,451,461,551,561,651,661,Z1: Optical axis region; 153,163,253,263,353,363,453,463,553,563,653,663,Z2: Circumferential region; 211,212: Parallel rays; A1: Object side; A2: Image side; CP: Center point; CP1: First center point; CP2: Second center point; EL: Extension line; I: Optical axis; Lc: Principal ray; Lm: Edge ray; M,R: Intersection point; OB: Optical boundary; TP1: First conversion point; TP2: Second conversion point; Z3: Relay region.

[0074] 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.

[0075] The optical system described in this specification includes at least one lens that receives imaging rays incident on the optical system from parallel to the optical axis to within a half-angle (HFOV) relative to the optical axis. The imaging rays pass through the optical system and form an image on the imaging plane. The statement "a lens has a positive (or negative) refractive index" means that the paraxial refractive index of the lens, calculated using Gaussian optics theory, is positive (or negative). The statement "the object side (or image side) of the lens" is defined as the specific range through which the imaging rays pass on the lens surface. The imaging rays include at least two types of rays: the chief ray (Lc) and the marginal ray (Lm) (e.g., ...). Figure 1 (As shown). The object side (or image side) of the lens can be divided into different regions depending on the location, including the optical axis region, the circumferential region, or one or more relay regions in some embodiments, which will be described in detail below.

[0076] 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 of this surface and the optical axis I. For example... Figure 1As illustrated, the first center point CP1 is located on the object-side surface 110 of lens 100, and the second center point CP2 is located on the image-side surface 120 of lens 100. A transition point is a point on the lens surface whose tangent is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the outermost radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. Furthermore, if a single lens surface has multiple transition points, these transition points are named sequentially from the first transition point in a radially outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (as shown in the example), and the third transition point TP2 (as shown in the example) are named sequentially from the first transition point in a radially outward direction. Figure 4 (as shown) and the Nth conversion point (farthest from optical axis I).

[0077] The region from the center point to the first conversion point TP1 is defined as the optical axis region, which includes the center point. The region radially outward from the Nth conversion point farthest from the optical axis I to the optical boundary OB is defined as the circumferential region. In some embodiments, a relay region may be additionally included between the optical axis region and the circumferential region; the number of relay regions depends on the number of conversion points.

[0078] 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.

[0079] In addition, see Figure 1 The lens 100 may also include an assembly portion 130 extending radially outward from the optical boundary OB. The assembly portion 130 is generally used for assembling the lens 100 into a corresponding component of an optical system (not shown). Imaging rays do not reach the assembly portion 130. The structure and shape of the assembly portion 130 are merely illustrative examples of the invention and are not intended to limit the scope of the invention. The assembly portion 130 of the lens discussed below may be partially or entirely omitted in the drawings.

[0080] 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 2As 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.

[0081] On the other hand, the convexity / concavity of the optical axis region can also be determined using the method commonly used by those knowledgeable in the field: judging the convexity / concavity of the lens's optical axis region by the sign of the paraxial radius of curvature (R-value). The R-value is commonly used in optical design software, such as Zemax or CodeV. It is also frequently found in lens data sheets within optical design software. For the object-side, a positive R-value indicates a convex optical axis region, while a negative R-value indicates a concave optical axis region. Conversely, for the image-side, a positive R-value indicates a concave optical axis region, while a negative R-value indicates a convex optical axis region. This method yields results consistent with the aforementioned method using the intersection of a ray / ray extension with the optical axis, where the focal point of a ray parallel to the optical axis is located on either the object-side or image-side of the lens to determine the convexity / concavity. The terms "a region is convex (or concave)," "a region is convex (or concave)," or "a convex (or concave) region" used in this specification may be used interchangeably.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] Figure 5 This is a radial sectional view of lens 500. The object-side surface 510 of lens 500 has no transition point. For a lens surface without a transition point, such as the object-side surface 510 of lens 500, the optical axis region is defined as 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface, and the circumferential region is defined as 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface. See also Figure 5 The lens 500 shown defines the optical axis region Z1 of the object-side surface 510 as 50% of the distance from the optical axis I to the optical boundary OB of the lens 500 surface. The R value of this object-side surface 510 is positive (i.e., R > 0), therefore, the optical axis region Z1 is convex. Since the object-side surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0088] Figure 6 This is a schematic diagram of the optical imaging lens according to the first embodiment of the present invention. Figure 7 A to Figure 7 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the first embodiment. Please refer to [the diagram]. Figure 6The optical imaging lens 10 of the first embodiment of the present invention includes, in sequence along an optical axis I from the object side A1 to the image side A2, a first lens 1, an aperture 0, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, and a filter 9. When light emitted from an object to be photographed enters the optical imaging lens 10 and passes through the first lens 1, aperture 0, second lens 2, third lens 3, fourth lens 4, fifth lens 5, sixth lens 6, and filter 9, an image is formed on an image plane 99. The filter 9 is disposed between the image side 66 of the sixth lens 6 and the image plane 99. It should be noted that the object side A1 is the side facing the object to be photographed, while the image side A2 is the side facing the image plane 99. In this embodiment, the filter 9 is an infrared cut filter.

[0089] In this embodiment, the first lens 1, second lens 2, third lens 3, fourth lens 4, fifth lens 5, sixth lens 6, and filter 9 of the optical imaging lens 10 each have an object-side surface 15, 25, 35, 45, 55, 65, 95 facing the object side A1 and allowing imaging light to pass through, and an image-side surface 16, 26, 36, 46, 56, 66, 96 facing the image side A2 and allowing imaging light to pass through. In this embodiment, the aperture 0 is positioned between the first lens 1 and the second lens 2.

[0090] The first lens 1 has a negative refractive index. The first lens 1 is made of plastic. The optical axis region 151 of the object-side surface 15 of the first lens 1 is convex, and its circumferential region 153 is also convex. The optical axis region 161 of the image-side surface 16 of the first lens 1 is concave, and its circumferential region 163 is also concave. In this embodiment, both the object-side surface 15 and the image-side surface 16 of the first lens 1 are aspherical surfaces, but the present invention is not limited thereto.

[0091] The second lens 2 has a positive refractive index. The second lens 2 is made of plastic. The optical axis region 251 of the object-side surface 25 of the second lens 2 is convex, and its circumferential region 253 is also convex. The optical axis region 261 of the image-side surface 26 of the second lens 2 is convex, and its circumferential region 263 is also convex. In this embodiment, both the object-side surface 25 and the image-side surface 26 of the second lens 2 are aspherical, but the invention is not limited thereto.

[0092] The third lens 3 has a negative refractive index. The third lens 3 is made of plastic. The optical axis region 351 of the object-side surface 35 of the third lens 3 is convex, and its circumferential region 353 is concave. The optical axis region 361 of the image-side surface 36 of the third lens 3 is concave, and its circumferential region 363 is concave. In this embodiment, both the object-side surface 35 and the image-side surface 36 of the third lens 3 are aspherical, but the present invention is not limited thereto.

[0093] The fourth lens 4 has a positive refractive index. The fourth lens 4 is made of plastic. The optical axis region 451 of the object-side surface 45 of the fourth lens 4 is convex, and its circumferential region 453 is also convex. The optical axis region 461 of the image-side surface 46 of the fourth lens 4 is convex, and its circumferential region 463 is also convex. In this embodiment, both the object-side surface 45 and the image-side surface 46 of the fourth lens 4 are aspherical, but the invention is not limited thereto.

[0094] The fifth lens 5 has a negative refractive index. The fifth lens 5 is made of plastic. The optical axis region 551 of the object-side surface 55 of the fifth lens 5 is concave, and its circumferential region 553 is also concave. The optical axis region 561 of the image-side surface 56 of the fifth lens 5 is convex, and its circumferential region 563 is also convex. In this embodiment, both the object-side surface 55 and the image-side surface 56 of the fifth lens 5 are aspherical, but the invention is not limited thereto.

[0095] The sixth lens 6 has a negative refractive index. The sixth lens 6 is made of plastic. The optical axis region 651 of the object-side surface 65 of the sixth lens 6 is convex, and its circumferential region 653 is concave. The optical axis region 661 of the image-side surface 66 of the sixth lens 6 is concave, and its circumferential region 663 is convex. In this embodiment, both the object-side surface 65 and the image-side surface 66 of the sixth lens 6 are aspherical, but the invention is not limited thereto.

[0096] In this embodiment, the optical imaging lens 10 has only the six lenses mentioned above.

[0097] Other detailed optical data for the first embodiment are as follows: Figure 8 As shown, the effective focal length (EFL) of the optical imaging lens 10 in the first embodiment is 1.931 mm, the half field of view (HFOV) is 44.300 degrees, the system length is 4.070 mm, the aperture value (F-number, Fno) is 2.200, and the image height is 1.810 mm. The system length refers to the distance from the object side surface 15 of the first lens 1 to the imaging surface 99 on the optical axis I.

[0098] Furthermore, in this embodiment, the object-side surfaces 15, 25, 35, 45, 55, 65 and the image-side surfaces 16, 26, 36, 46, 56, 66 of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6, totaling twelve surfaces, are aspherical. Among them, the object-side surfaces 15, 25, 35, 45, 55, 65 and the image-side surfaces 16, 26, 36, 46, 56, 66 are general even-order aspherical surfaces. These aspherical surfaces are defined according to the following formula (1):

[0099]

[0100] in:

[0101] Y: The distance between a point on the aspherical curve and the optical axis I;

[0102] Z: Depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface that is Y away from the optical axis I and the tangent plane that is tangent to the vertex on the optical axis I of the aspherical surface).

[0103] R: Radius of curvature of the lens surface near the optical axis I;

[0104] K: Conic constant;

[0105] a i : The i-th order aspherical coefficient.

[0106] The aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in formula (1) are as follows: Figure 9 As shown. Among them, Figure 9 Field number 15 indicates that it is the aspherical coefficient of the object surface 15 of the first lens 1, and other fields follow the same pattern. In this embodiment, the second-order aspherical coefficient a2 of each aspherical surface is zero, so it is not listed. Figure 9 middle.

[0107] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the first embodiment are as follows: Figure 42 , 43 As shown.

[0108] in,

[0109] T1 is the thickness of the first lens 1 on the optical axis I;

[0110] T2 is the thickness of the second lens 2 on the optical axis I;

[0111] T3 is the thickness of the third lens 3 on the optical axis I;

[0112] T4 is the thickness of the fourth lens 4 on the optical axis I;

[0113] T5 is the thickness of the fifth lens 5 on optical axis I;

[0114] T6 is the thickness of the sixth lens 6 on optical axis I;

[0115] G12 is the air gap between the first lens 1 and the second lens 2 on the optical axis I;

[0116] G23 is the air gap between the second lens 2 and the third lens 3 on the optical axis I;

[0117] G34 is the air gap between the third lens 3 and the fourth lens 4 on the optical axis I;

[0118] G45 is the air gap between the fourth lens 4 and the fifth lens 5 on the optical axis I;

[0119] G56 is the air gap between the fifth lens 5 and the sixth lens 6 on the optical axis I;

[0120] G6F is the air gap between the sixth lens 6 and the filter 9 on the optical axis I;

[0121] TF is the thickness of filter 9 on optical axis I;

[0122] GFP is the air gap between filter 9 and imaging surface 99 on optical axis I;

[0123] AAG is the sum of the five air gaps on the optical axis I from the first lens 1 to the sixth lens 6, namely the sum of G12, G23, G34, G45, and G56;

[0124] ALT is the sum of the thicknesses of the six lenses from the first lens 1 to the sixth lens 6 on the optical axis I, namely the sum of T1, T2, T3, T4, T5, and T6;

[0125] TL is the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6.

[0126] TTL is the distance on the optical axis I from the object surface 15 to the imaging surface 99 of the first lens 1.

[0127] BFL is the distance on optical axis I from the image side 66 of the sixth lens 6 to the imaging plane 99, which is the sum of G6F, TF, and GFP.

[0128] HFOV is half the field of view of the optical imaging lens 10;

[0129] ImgH is the image height of the optical imaging lens 10;

[0130] EFL is the effective focal length of the optical imaging lens 10.

[0131] Furthermore, redefine:

[0132] L11 t42 is the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 46 of the fourth lens 4.

[0133] L42t 62 is the distance on optical axis I from the image-side surface 46 of the fourth lens 4 to the image-side surface 66 of the sixth lens 6.

[0134] Tmax is the thickest lens thickness of lenses 1 to 6 on optical axis I, that is, the maximum values ​​of T1, T2, T3, T4, T5, and T6.

[0135] Tmax2 is the second thickest lens thickness of the first lens 1 to the sixth lens 6 on the optical axis I, that is, the second largest value of T1, T2, T3, T4, T5, and T6;

[0136] f1 is the focal length of the first lens 1;

[0137] f2 is the focal length of the second lens 2;

[0138] f3 is the focal length of the third lens 3;

[0139] f4 is the focal length of the fourth lens 4;

[0140] f5 is the focal length of the fifth lens 5;

[0141] f6 is the focal length of the sixth lens 6;

[0142] n1 is the refractive index of the first lens 1;

[0143] n2 is the refractive index of the second lens 2;

[0144] n3 is the refractive index of the third lens 3;

[0145] n4 is the refractive index of the fourth lens 4;

[0146] n5 is the refractive index of the fifth lens 5;

[0147] n6 is the refractive index of the sixth lens 6;

[0148] V1 is the Abbe number of the first lens 1;

[0149] V2 is the Abbe number of the second lens 2;

[0150] V3 is the Abbe number of the third lens 3;

[0151] V4 is the Abbe number of the fourth lens 4;

[0152] V5 is the Abbe number of the fifth lens 5;

[0153] V6 is the Abbe number of the sixth lens 6.

[0154] See also Figure 7 A to Figure 7 D, Figure 7 The diagram illustrating A shows the longitudinal spherical aberration on the imaging plane 99 in the first embodiment when the wavelengths are 486 nm, 588 nm, and 656 nm. Figure 7 B and Figure 7 The diagrams for C illustrate the field curvature aberrations in the sagittal and tangential directions on the imaging plane 99 in the first embodiment when the wavelengths are 486 nm, 588 nm, and 656 nm. Figure 7 The diagram of D illustrates the distortion aberrations on the imaging plane 99 in the first embodiment when the wavelengths are 486 nm, 588 nm, and 656 nm. The longitudinal spherical aberration of this first embodiment is as follows: Figure 7 As shown in A, the curves formed by each wavelength are very close and move towards the center, indicating that off-axis rays of different heights for each wavelength are concentrated near the imaging point. From the skewing of the curves for each wavelength, it can be seen that the imaging point deviation of off-axis rays of different heights is controlled within the range of ±0.018 mm. Therefore, this first embodiment does significantly improve spherical aberration of the same wavelength. In addition, the distances between the three representative wavelengths are also quite close, indicating that the imaging positions of rays of different wavelengths are quite concentrated, thus significantly improving chromatic aberration.

[0155] exist Figure 7 B and Figure 7 In the two field curvature aberration diagrams of C, the focal length variation of the three representative wavelengths falls within ±0.03 mm across the entire field of view, indicating that the optical system of this first embodiment can effectively eliminate aberrations. Figure 7 The distortion aberration diagram of D shows that the distortion aberration of the first embodiment is maintained within the range of ±5%, indicating that the distortion aberration of the first embodiment meets the imaging quality requirements of the optical system. Based on this, it can be seen that the first embodiment can still provide good imaging quality compared with existing optical lenses, even with the system length shortened to 4.070 mm. Therefore, the first embodiment can shorten the lens length and have good imaging quality while maintaining good optical performance.

[0156] Figure 10 This is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention. Figure 11 A to Figure 11 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the second embodiment. Please refer to [the diagram]. Figure 10A second embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. It should be noted that, for clearer illustration, Figure 10 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0157] Detailed optical data of the optical imaging lens 10 in the second embodiment are as follows: Figure 12 As shown, the optical imaging lens 10 of the second embodiment has an effective focal length of 1.949 mm, a half angle of view of 39.600 degrees, a system length of 3.592 mm, an aperture of 2.200, and an image height of 1.810 mm.

[0158] like Figure 13 As shown, Figure 13 Then, these are the aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in the above formula (1) of the second embodiment.

[0159] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the second embodiment are as follows: Figure 42 , 43 As shown.

[0160] The longitudinal spherical aberration of this second embodiment is as follows: Figure 11 As shown in Figure A, the imaging point deviation of off-axis rays at different heights is controlled within ±0.009 mm. Figure 11 B and Figure 11 In the two field curvature aberration diagrams of C, the focal length variation for the three representative wavelengths falls within ±0.03 mm across the entire field of view. Figure 11 The distortion aberration diagram of D shows that the distortion aberration of this second embodiment is maintained within the range of ±12%.

[0161] As can be seen from the above description, the system length of the second embodiment is shorter than that of the first embodiment, and therefore the second embodiment has a smaller volume compared to the first embodiment. Furthermore, the longitudinal spherical aberration of the second embodiment is smaller than that of the first embodiment.

[0162] Figure 14 This is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention. Figure 15 A to Figure 15 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the third embodiment. Please refer to [the diagram]. Figure 14A third embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. It should be noted that, for clearer illustration, Figure 14 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0163] Detailed optical data of the optical imaging lens 10 in the third embodiment are as follows: Figure 16 As shown, the effective focal length of the optical imaging lens 10 in the third embodiment is 2.097 mm, the half angle of view is 43.447 degrees, the system length is 4.573 mm, the aperture value is 2.200, and the image height is 1.810 mm.

[0164] like Figure 17 As shown, Figure 17 Then, these are the aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in the above formula (1).

[0165] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the third embodiment are as follows: Figure 42 , 43 As shown.

[0166] The longitudinal spherical aberration of this third embodiment is as follows: Figure 15 As shown in Figure A, the imaging point deviation of off-axis rays at different heights is controlled within ±0.018 mm. Figure 15 B and Figure 15 In the two field curvature aberration diagrams of C, the focal length variation for the three representative wavelengths falls within ±0.03 mm across the entire field of view. Figure 15 The distortion aberration diagram of D shows that the distortion aberration of this third embodiment is maintained within the range of ±10%.

[0167] As can be seen from the above description, the third embodiment is easy to manufacture and therefore has a high yield.

[0168] Figure 18 This is a schematic diagram of an optical imaging lens according to the fourth embodiment of the present invention. Figure 19 A to Figure 19 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the fourth embodiment. Please refer to [the diagram]. Figure 18 A fourth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. It should be noted that, for clearer illustration, Figure 18The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0169] Detailed optical data of the optical imaging lens 10 in the fourth embodiment are as follows: Figure 20 As shown, the optical imaging lens 10 of the fourth embodiment has an effective focal length of 1.830 mm, a half angle of view of 47.752 degrees, a system length of 3.756 mm, an aperture of 2.200, and an image height of 1.810 mm.

[0170] like Figure 21 As shown, Figure 21 These are the aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in the above formula (1) of the fourth embodiment.

[0171] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the fourth embodiment are as follows: Figure 42 , 43 As shown.

[0172] The longitudinal spherical aberration of this fourth embodiment is as follows: Figure 19 As shown in Figure A, the imaging point deviation of off-axis rays at different heights is controlled within ±0.012 mm. Figure 19 B and Figure 19 In the two field curvature aberration diagrams of C, the focal length variation for the three representative wavelengths falls within ±0.016 mm across the entire field of view. Figure 19 The distortion aberration diagram of D shows that the distortion aberration of this fourth embodiment is maintained within the range of ±12%.

[0173] As can be seen from the above description, the system length of the fourth embodiment is shorter than that of the first embodiment, and the half-angle of view of the fourth embodiment is greater than that of the first embodiment. Therefore, compared with the first embodiment, the fourth embodiment has a smaller volume and a larger angular range for receiving images. In addition, the longitudinal spherical aberration of the fourth embodiment is smaller than that of the first embodiment, and the field curvature aberration of the fourth embodiment is smaller than that of the first embodiment.

[0174] Figure 22 This is a schematic diagram of an optical imaging lens according to the fifth embodiment of the present invention. Figure 23 A to Figure 23 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the fifth embodiment. Please refer to [the diagram]. Figure 22A fifth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. Furthermore, in this embodiment, the circumferential region 353 of the object-side surface 35 of the third lens 3 is convex, and the sixth lens 6 has a positive refractive index. It should be noted that, for clearer illustration, Figure 22 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0175] Detailed optical data of the optical imaging lens 10 in the fifth embodiment are as follows: Figure 24 As shown, the optical imaging lens 10 of the fifth embodiment has an effective focal length of 1.871 mm, a half angle of view of 39.600 degrees, a system length of 4.056 mm, an aperture of 2.200, and an image height of 1.810 mm.

[0176] like Figure 25 As shown, Figure 25 Then, the aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in the above formula (1) are the aspherical coefficients.

[0177] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the fifth embodiment are as follows: Figure 42 , 43 As shown.

[0178] The longitudinal spherical aberration of this fifth embodiment is as follows: Figure 23 As shown in Figure A, the imaging point deviation of off-axis rays at different heights is controlled within ±0.008 mm. Figure 23 B and Figure 23 In the two field curvature aberration diagrams of C, the focal length variation for the three representative wavelengths falls within ±0.012 mm across the entire field of view. Figure 23 The distortion aberration diagram of D shows that the distortion aberration of this fifth embodiment is maintained within the range of ±25%.

[0179] As can be seen from the above description, the system length of the fifth embodiment is shorter than that of the first embodiment. Therefore, the fifth embodiment has a smaller volume compared to the first embodiment. Furthermore, the longitudinal spherical aberration of the fifth embodiment is smaller than that of the first embodiment, and the field curvature aberration of the fifth embodiment is smaller than that of the first embodiment.

[0180] Figure 26 This is a schematic diagram of an optical imaging lens according to the sixth embodiment of the present invention. Figure 27 A to Figure 27 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the sixth embodiment. Please refer to [the diagram]. Figure 26A sixth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. Furthermore, in this embodiment, the optical axis region 251 of the object-side surface 25 of the second lens 2 is concave, the circumferential region 353 of the object-side surface 35 of the third lens 3 is convex, and the sixth lens 6 has a positive refractive index. It should be noted that, for clearer illustration, Figure 26 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0181] Detailed optical data of the optical imaging lens 10 in the sixth embodiment are as follows: Figure 28 As shown, the optical imaging lens 10 of the sixth embodiment has an effective focal length of 1.657 mm, a half angle of view of 42.672 degrees, a system length of 4.492 mm, an aperture of 2.200, and an image height of 1.810 mm.

[0182] like Figure 29 As shown, Figure 29 Then, these are the aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in the above formula (1).

[0183] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the sixth embodiment are as follows: Figure 44 , 45 As shown.

[0184] The longitudinal spherical aberration of this sixth embodiment is as follows: Figure 27 As shown in Figure A, the imaging point deviation of off-axis rays at different heights is controlled within ±0.014 mm. Figure 27 B and Figure 27 In the two field curvature aberration diagrams of C, the focal length variation for the three representative wavelengths falls within ±0.02 mm across the entire field of view. Figure 27 The distortion aberration diagram of D shows that the distortion aberration of this fifth embodiment is maintained within the range of ±25%.

[0185] As can be seen from the above description, the longitudinal spherical aberration of the sixth embodiment is smaller than that of the first embodiment, and the field curvature aberration of the sixth embodiment is smaller than that of the first embodiment.

[0186] Figure 30 This is a schematic diagram of an optical imaging lens according to the seventh embodiment of the present invention. Figure 31 A to Figure 31 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the seventh embodiment. Please refer to [the diagram]. Figure 30A seventh embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. It should be noted that, for clearer illustration, Figure 30 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0187] Detailed optical data of the optical imaging lens 10 in the seventh embodiment are as follows: Figure 32 As shown, the optical imaging lens 10 of the seventh embodiment has an effective focal length of 2.066 mm, a half angle of view of 45.176 degrees, a system length of 4.755 mm, an aperture of 2.200, and an image height of 1.810 mm.

[0188] like Figure 33 As shown, Figure 33 Then, the aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in the above formula (1) are the aspherical coefficients.

[0189] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the seventh embodiment are as follows: Figure 44 , 45 As shown.

[0190] The longitudinal spherical aberration of this seventh embodiment is as follows: Figure 31 As shown in Figure A, the imaging point deviation of off-axis rays at different heights is controlled within ±0.035 mm. Figure 31 B and Figure 31 In the two field curvature aberration diagrams of C, the focal length variation for the three representative wavelengths falls within ±0.03 mm across the entire field of view. Figure 31 The distortion aberration diagram of D shows that the distortion aberration of this fifth embodiment is maintained within the range of ±16%.

[0191] As can be seen from the above description, the half-angle of the seventh embodiment is larger than that of the first embodiment. Therefore, compared with the first embodiment, the seventh embodiment has a larger angle range for receiving images.

[0192] Figure 34 This is a schematic diagram of the optical imaging lens according to the eighth embodiment of the present invention. Figure 35 A to Figure 35 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the eighth embodiment. Please refer to [the diagram]. Figure 34An eighth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. Furthermore, in this embodiment, the circumferential region 353 of the object-side surface 35 of the third lens 3 is convex, and the sixth lens 6 has a positive refractive index. It should be noted that, for clearer illustration, Figure 34 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0193] Detailed optical data of the optical imaging lens 10 of the eighth embodiment are as follows: Figure 36 As shown, the optical imaging lens 10 of the eighth embodiment has an effective focal length of 1.488 mm, a half angle of view of 45.804 degrees, a system length of 4.821 mm, an aperture of 2.200, and an image height of 1.810 mm.

[0194] like Figure 37 As shown, Figure 37 Then, the aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in the above formula (1) are the aspherical coefficients.

[0195] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the eighth embodiment are as follows: Figure 44 , 45 As shown.

[0196] The longitudinal spherical aberration of this eighth embodiment is as follows: Figure 35 As shown in Figure A, the imaging point deviation of off-axis rays at different heights is controlled within ±0.016 mm. Figure 35 B and Figure 35 In the two field curvature aberration diagrams of C, the focal length variation for the three representative wavelengths falls within ±0.035 mm across the entire field of view. Figure 35 The distortion aberration diagram of D shows that the distortion aberration of this fifth embodiment is maintained within the range of ±25%.

[0197] As can be seen from the above description, the half-angle of view in the eighth embodiment is greater than that in the first embodiment. Therefore, compared to the first embodiment, the eighth embodiment has a larger angular range for receiving images. Furthermore, the longitudinal spherical aberration in the eighth embodiment is smaller than that in the first embodiment.

[0198] Figure 38 This is a schematic diagram of an optical imaging lens according to the ninth embodiment of the present invention. Figure 39 A to Figure 39 D represents the longitudinal spherical aberration and various aberrations of the optical imaging lens in the ninth embodiment. Please refer to [the diagram]. Figure 38A ninth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, 4, 5, and 6 are more or less different. Furthermore, in this embodiment, the fifth lens 5 has a positive refractive index. It should be noted that, for clear visualization of the figures, Figure 38 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0199] Detailed optical data of the optical imaging lens 10 of the ninth embodiment are as follows: Figure 40 As shown, the optical imaging lens 10 of the ninth embodiment has an effective focal length of 1.650 mm, a half angle of view of 39.602 degrees, a system length of 3.444 mm, an aperture of 2.200, and an image height of 1.810 mm.

[0200] like Figure 41 As shown, Figure 41 Then, these are the aspherical coefficients of the object side 15 of the first lens 1 to the image side 66 of the sixth lens 6 in the above formula (1) of the ninth embodiment.

[0201] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the ninth embodiment are as follows: Figure 44 , 45 As shown.

[0202] The longitudinal spherical aberration of this ninth embodiment is as follows: Figure 39 As shown in Figure A, the imaging point deviation of off-axis rays at different heights is controlled within ±0.3 mm. Figure 39 B and Figure 39 In the two field curvature aberration diagrams of C, the focal length variation for the three representative wavelengths falls within ±0.3 mm across the entire field of view. Figure 39 The distortion aberration diagram of D shows that the distortion aberration of this fifth embodiment is maintained within the range of ±25%.

[0203] As can be seen from the above description, the system length of the ninth embodiment is shorter than that of the first embodiment. Therefore, the ninth embodiment has a smaller volume compared to the first embodiment.

[0204] See also Figures 42 to 45 , Figures 42 to 45 This is a table showing the optical parameters of the first to ninth embodiments described above. When the half-angle of the optical imaging lens 10 satisfies the following proportional relationship, the purpose of expanding the field of view can be achieved.

[0205] in,

[0206] The optical imaging lens 10 can meet the requirement of HFOV / Fno≧18.000 degrees, and the preferred range is 18.000 degrees≦HFOV / Fno≦23.900 degrees;

[0207] The optical imaging lens 10 can meet the requirement of HFOV / (Tmax+Tmax2)≧20.000 degrees / mm, with a preferred range of 20.000 degrees / mm≦HFOV / (Tmax+Tmax2)≦43.300 degrees / mm; and

[0208] The optical imaging lens 10 can meet HFOV / TTL≧9.500 degrees / mm, with a preferred range of 9.500 degrees / mm≦HFOV / TTL≦14.000 degrees / mm.

[0209] Furthermore, in order to shorten the length of the lens system and ensure image quality, while also considering the ease of manufacturing, the air gap between the lenses is reduced or the lens thickness is appropriately shortened. If the numerical limits of the following conditional formula are met, the embodiments of the present invention can have a better configuration.

[0210] in,

[0211] The optical imaging lens 10 can meet the requirement of (EFL+BFL) / ALT≧0.800, with a preferred range of 0.800≦(EFL+BFL) / ALT≦1.300;

[0212] The optical imaging lens 10 can meet the requirement of ALT / AAG≧3.000, with a preferred range of 3.000≦ALT / AAG≦5.700;

[0213] The optical imaging lens 10 can meet the requirement of TL / (G12+G23+G34)≧5.100, and the preferred range is 5.100≦TL / (G12+G23+G34)≦9.100;

[0214] The optical imaging lens 10 can meet the requirement of TTL / (Tmax+Tmax2)≦3.100, with a preferred range of 1.900≦TTL / (Tmax+Tmax2)≦3.100;

[0215] The optical imaging lens 10 can meet the requirement of (G34+T4+G45) / BFL≧1.000, with a preferred range of 1.000≦(G34+T4+G45) / BFL≦1.800;

[0216] The optical imaging lens 10 can meet the requirement of (EFL+BFL) / AAG≧2.400, with a better range of 2.400≦(EFL+BFL) / AAG≦4.900;

[0217] The optical imaging lens 10 can meet the requirement of ALT / (G12+G45+G56)≧4.000, with a better range of 4.000≦ALT / (G12+G45+G56)≦8.000;

[0218] The optical imaging lens 10 can meet the requirement of TL / BFL≦4.500, with a preferred range of 2.900≦TL / BFL≦4.500;

[0219] The optical imaging lens 10 can meet the requirement of TTL / (T1+G12)≦9.000, with a preferred range of 4.300≦TTL / (T1+G12)≦9.000;

[0220] The optical imaging lens 10 can meet the requirement of (G45+EFL) / (T1+T2+T3)≧1.500, and the preferred range is 1.500≦(G45+EFL) / (T1+T2+T3)≦2.400;

[0221] The optical imaging lens 10 can meet the requirement of (EFL+BFL) / (G12+G45)≦7.200, with a better range of 3.100≦(EFL+BFL) / (G12+G45)≦7.200;

[0222] The optical imaging lens 10 can meet the condition ALT / (G23+T4)≦3.400, with a better range of 2.200≦ALT / (G23+T4)≦3.400;

[0223] The optical imaging lens 10 can conform to TTL / (T5+G56+T6)≧5.800, with a preferred range of 5.800≦TTL / (T5+G56+T6)≦10.700; and

[0224] The optical imaging lens 10 can conform to TTL / (T2+T3+T4)≦4.100, with a preferred range of 1.700≦TTL / (T2+T3+T4)≦4.100.

[0225] Furthermore, any combination of parameters in the alternative embodiments can be used to increase the lens group constraints, thereby facilitating the design of lens groups with the same architecture as the present invention. Given the unpredictability of optical system design, under the architecture of the present invention, satisfying the above-mentioned conditions can better shorten the length of the lens system, increase the field of view, improve image quality, or improve assembly yield, thus overcoming the shortcomings of prior art.

[0226] The exemplary limiting relationships listed above can be selectively combined and applied in varying numbers to embodiments of the present invention, and are not limited thereto. In implementing the present invention, in addition to the aforementioned relationships, further detailed structures such as the arrangement of concave and convex surfaces of multiple lenses can be designed for a single lens or more broadly for multiple lenses to enhance control over system performance and / or resolution. For example, a convex surface located in the optical axis region can be selectively formed additionally on the object-side surface of the first lens. It should be noted that these details should be selectively combined and applied to other embodiments of the present invention without conflict.

[0227] In summary, the optical imaging lens of the embodiments of the present invention can achieve the following effects and advantages:

[0228] I. The longitudinal spherical aberration, astigmatism, and distortion in all embodiments of this invention conform to usage specifications. Furthermore, red, green, and blue light rays at different altitudes are all concentrated near the imaging point. The skewing amplitude of each curve shows that the imaging point deviation of off-axis light rays at different altitudes is controlled, demonstrating excellent spherical aberration, astigmatism, and distortion suppression capabilities. Further review of the imaging quality data reveals that the distances between the red, green, and blue light rays are also quite close, indicating that this invention exhibits excellent concentration of different wavelengths of light under various conditions, resulting in superior dispersion suppression capabilities. In summary, this invention, through the design and combination of the aforementioned lenses, can produce excellent imaging quality.

[0229] II. In the optical imaging lens of this invention embodiment, by designing the first lens to have a negative refractive index, the circumferential region of the image-side surface of the second lens to be convex, the optical axis region of the object-side surface of the third lens to be convex, the optical axis region of the object-side surface of the fourth lens to be convex, the optical axis region of the image-side surface of the fifth lens to be convex, the circumferential region of the object-side surface of the sixth lens to be concave, and the optical axis region of the image-side surface of the sixth lens to be concave, and the optical imaging lens conforms to L11 t42 / L42t62≧2.400 and V3+V4+V5≦120.000, the entire optical imaging lens can effectively improve the chromatic aberration of the optical system while expanding the field of view and reducing the length of the lens system. The preferred implementation ranges for L11 t42 / L42t62 and V3+V4+V5 are 2.400≦L11 t42 / L42t62 and 2.400≦L11 t42 / L42t62, respectively. 62≦5.400, 85.000≦V3+V4+V5≦120.000.

[0230] III. In the optical imaging lens of this embodiment of the invention, by designing the first lens to have a negative refractive index, the circumferential region of the object-side surface of the first lens to be convex, the circumferential region of the image-side surface of the third lens to be concave, the optical axis region of the image-side surface of the fifth lens to be convex, the circumferential region of the object-side surface of the sixth lens to be concave, the optical axis region of the image-side surface of the sixth lens to be concave, and the circumferential region of the image-side surface of the sixth lens to be convex, and the optical imaging lens conforming to L11 t42 / L42t62≧2.500 and V4+V5≦80.000, when combined with (a) the optical axis region of the image-side surface of the second lens being designed to be convex or (b) the third lens being designed to have a negative refractive index, in addition to maintaining good image quality while expanding the field of view and reducing the length of the lens system, it can also further correct chromatic aberration, field curvature aberration and reduce distortion aberration of the optical system, wherein L11 The optimal implementation ranges for t42 / L42t62 and V4+V5 are 2.500≦L11, t42 / L42t62≦5.400, and 65.000≦V4+V5≦80.000, respectively.

[0231] IV. In the optical imaging lens of this embodiment of the invention, by designing the first lens to have a negative refractive index, the circumferential region of the object-side surface of the first lens to be convex, the second lens to have a positive refractive index, the circumferential region of the image-side surface of the third lens to be concave, the circumferential region of the image-side surface of the fifth lens to be convex, and the optical axis region of the image-side surface of the sixth lens to be concave, and among all the lenses of the optical imaging lens (e.g., the first to the sixth lenses), the thickest and second thickest lenses are among the first to the fourth lenses, the optical imaging lens conforms to... When V4+V5≦80.000 is combined with (a) the circumferential area of ​​the image side of the second lens is designed as a convex surface, the circumferential area of ​​the object side of the sixth lens is designed as a concave surface, or (b) the optical axis area of ​​the object side of the fifth lens is designed as a concave surface, in addition to maintaining good image quality while reducing lens length, it can further correct field curvature aberration and reduce distortion aberration of the optical system. The preferred implementation range of V4+V5 is 65.000≦V4+V5≦80.000.

[0232] Fifth, the aspherical design of the lenses in the various embodiments of the present invention is more conducive to optimizing image quality.

[0233] VI. The use of plastic material for the lenses in the various embodiments of the present invention helps to reduce weight, further reducing the weight of the optical imaging lens and saving costs.

[0234] 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.

[0235] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. 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 lens to the sixth lens includes an object side facing the object side and through which imaging light passes and an image side facing the image side and through which imaging light passes. The first lens has a negative refractive index; The second lens has a positive refractive index; The third lens has a negative refractive index, and the optical axis region of the object side of the third lens is convex, the circumferential region of the object side of the third lens is concave, and the circumferential region of the image side of the third lens is concave. The fourth lens has a positive refractive index and the optical axis region on the object side of the fourth lens is convex. The fifth lens has a negative refractive index; and The optical axis region on the side of the sixth lens is convex, wherein... This optical imaging lens has only six elements and satisfies the following condition: TTL / (T1+G12)≦9.000 and TL / BFL≦4.500, where TTL is the distance from the object side of the first lens to the image surface of the sixth lens on the optical axis, T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, TL is the distance from the object side of the first lens to the image side of the sixth lens on the optical axis, and BFL is the distance from the image side of the sixth lens to the image surface of the sixth lens on the optical axis.

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 lens to the sixth lens includes an object side facing the object side and through which imaging light passes and an image side facing the image side and through which imaging light passes. The first lens has a negative refractive index and the optical axis region on the object side of the first lens is convex. The second lens has a positive refractive index; The third lens has a negative refractive index, and an optical axis region on the object side of the third lens is convex and a circumferential region on the object side of the third lens is concave. The fourth lens has a positive refractive index and the optical axis region on the object side of the fourth lens is convex. The fifth lens has a negative refractive index; and The optical axis region on the side of the sixth lens is convex, wherein... This optical imaging lens has only six elements and satisfies the following condition: TTL / (T1+G12)≦9.000 and TL / BFL≦4.500, where TTL is the distance from the object side of the first lens to the image surface of the sixth lens on the optical axis, T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, TL is the distance from the object side of the first lens to the image side of the sixth lens on the optical axis, and BFL is the distance from the image side of the sixth lens to the image surface of the sixth lens on the optical axis.

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 lens to the sixth lens includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The first lens has a negative refractive index and the optical axis region on the object side of the first lens is convex. The second lens has a positive refractive index and a circumferential region on the object side of the second lens is convex. The third lens has a negative refractive index and the optical axis region on the object side of the third lens is convex. The fourth lens has a positive refractive index, and a region along the optical axis of the object-side surface of the fourth lens is convex, and a circumferential region of the image-side surface of the fourth lens is convex; and The optical axis region on the side of the sixth lens is convex, wherein... This optical imaging lens has only six elements and satisfies the following condition: TTL / (T1+G12)≦9.000; TL / BFL≦4.500; and V4+V5≦80.000, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, V4 is the Abbe number of the fourth lens, V5 is the Abbe number of the fifth lens, TL is the distance from the object side of the first lens to the image side of the sixth lens on the optical axis, and BFL is the distance from the image side of the sixth lens to the imaging surface on the optical axis.

4. 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 lens to the sixth lens includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The first lens has a negative refractive index and a circumferential region on the object side of the first lens is convex. The second lens has a positive refractive index and a circumferential region on the object side of the second lens is convex. The third lens has a negative refractive index, and the optical axis region of the object side of the third lens is convex and the circumferential region of the image side of the third lens is concave. The fourth lens has a positive refractive index; an optical axis region on the object-side surface of the fourth lens is convex; an optical axis region on the image-side surface of the fourth lens is convex; and a circumferential region on the image-side surface of the fourth lens is convex. The optical axis region on the side of the sixth lens is convex, wherein... This optical imaging lens has only six elements and satisfies the following condition: TTL / (T1+G12)≦9.000; TL / BFL≦4.500; and V4+V5≦80.000, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, V4 is the Abbe number of the fourth lens, V5 is the Abbe number of the fifth lens, TL is the distance from the object side of the first lens to the image side of the sixth lens on the optical axis, and BFL is the distance from the image side of the sixth lens to the imaging surface on the optical axis.

5. The optical imaging lens according to any one of claims 1-4, characterized in that, The optical imaging lens further satisfies the following condition: (G34+T4+G45) / BFL≧1.000, where G34 is the air gap between the third lens and the fourth lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and G45 is the air gap between the fourth lens and the fifth lens on the optical axis.

6. The optical imaging lens according to any one of claims 1-4, characterized in that, The optical imaging lens further satisfies the following condition: ALT / (G23+T4)≦3.400, where ALT is the sum of the thicknesses of the six lenses from the first lens to the sixth lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, and T4 is the thickness of the fourth lens on the optical axis.

7. 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 lens to the sixth lens includes an object side facing the object side and through which imaging light passes and an image side facing the image side and through which imaging light passes. The first lens has a negative refractive index; The second lens has a positive refractive index; The third lens has a negative refractive index, and the optical axis region of the object side of the third lens is convex and the circumferential region of the image side of the third lens is concave. The fourth lens has a positive refractive index; The fifth lens has a negative refractive index; and The sixth lens has a concave circumferential region on the object side and a concave optical axis region on the image side, wherein... This optical imaging lens has only six elements and satisfies the following condition: TTL / (T1+G12)≦9.000; TL / BFL≦4.500 and TL / (G12+G23+G34)≧5.100, where TTL is the distance from the object side of the first lens to the imaging surface on the optical axis, T1 is the thickness of the first lens on the optical axis, TL is the distance from the object side of the first lens to the image side of the sixth lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, and BFL is the distance from the image side of the sixth lens to the imaging surface on the optical axis.

8. The optical imaging lens according to claim 7, characterized in that, The optical imaging lens further satisfies the following condition: (G34+T4+G45) / BFL≧1.000, where T4 is the thickness of the fourth lens on the optical axis, and G45 is the air gap between the fourth lens and the fifth lens on the optical axis.

9. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: L11t42 / L42t62≧2.500, where L11t42 is the distance on the optical axis from the object side of the first lens to the image side of the fourth lens, and L42t62 is the distance on the optical axis from the image side of the fourth lens to the image side of the sixth lens.

10. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens satisfies the following condition: HFOV / Fno ≥ 18.000 degrees, where HFOV is the half angle of view of the optical imaging lens and Fno is the aperture value of the optical imaging lens.

11. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: (EFL+BFL) / ALT≧0.800, where EFL is the effective focal length of the optical imaging lens, and ALT is the sum of the thicknesses of the six lenses from the first lens to the sixth lens on the optical axis.

12. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: HFOV / (Tmax+Tmax2)≧20.000 degrees / mm, where HFOV is the half angle of view of the optical imaging lens, Tmax is the thickest lens thickness of the first lens to the sixth lens on the optical axis, and Tmax2 is the second thickest lens thickness of the first lens to the sixth lens on the optical axis.

13. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: (EFL+BFL) / AAG≧2.400, where EFL is the effective focal length of the optical imaging lens, and AAG is the sum of the five air gaps of the first lens to the sixth lens on the optical axis.

14. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: ALT / (G12+G45+G56)≧4.000, where ALT is the sum of the thicknesses of the six lenses from the first lens to the sixth lens on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, and G56 is the air gap between the fifth lens and the sixth lens on the optical axis.

15. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: (G45+EFL) / (T1+T2+T3)≧1.500, where G45 is the air gap between the fourth lens and the fifth lens on the optical axis, EFL is the effective focal length of the optical imaging lens, T2 is the thickness of the second lens on the optical axis, and T3 is the thickness of the third lens on the optical axis.

16. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens satisfies the following condition: HFOV / TTL ≥ 9.500 degrees / mm, where HFOV is the half angle of view of the optical imaging lens.

17. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: (EFL+BFL) / (G12+G45)≦7.200, where EFL is the effective focal length of the optical imaging lens, and G45 is the air gap between the fourth lens and the fifth lens on the optical axis.

18. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: TTL / (T5+G56+T6)≧5.800, where T5 is the thickness of the fifth lens on the optical axis, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and T6 is the thickness of the sixth lens on the optical axis.

19. The optical imaging lens according to claim 1, 2, 3, 4 or 7, characterized in that, The optical imaging lens further satisfies the following condition: TTL / (T2+T3+T4)≦4.100, where T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, and T4 is the thickness of the fourth lens on the optical axis.

Images