Large-aperture optical lens with high resolution

Abstract

The invention relates to the technical field of optical lenses, in particular to a large-aperture optical lens with high resolution, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, the second lens has negative focal power; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; the following conditions are satisfied: 1.8 lt; fNOlt, FNOlt; 1.95, 1.95; 40 degree lt; a FOVlt; 43.5 DEG C, 43.5 DEG C; -100 lt;-100 lt; r < 11 > / R < 12 > lt; -2; 0.5 lt; tTL / IMGlt; 0.61); fNO is the aperture size of the lens, FOV is half of the maximum field angle of the lens, R11 is the curvature radius of the object side surface of the sixth lens, R12 is the curvature radius of the image side surface of the sixth lens, and IMG is the maximum imaging height of the lens. The lens has the advantages of high imaging quality, high resolution, miniaturization and large aperture.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and in particular to a large aperture optical lens with high resolution. Background Art

[0002] In recent years, with the development of science and technology, the market has higher and higher requirements for electronic products. People expect higher pixel lenses to meet daily shooting needs, which has led to the rise of miniaturized imaging lens groups. The demand for miniaturized lens groups with good imaging quality has also risen sharply. On the other hand, in order to ensure that the imaging surface of the imaging lens group has sufficient illumination, the large aperture characteristic is one of the indispensable elements at present. It is difficult for previous lenses to take into account the requirements of high pixels, miniaturization and large aperture. Therefore, it is urgent to provide an optical lens with high pixels, large aperture and miniaturization to meet the specifications and needs of the future market. Summary of the invention

[0003] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a large aperture optical lens with high resolution, which is mainly composed of six lenses, and all six lenses adopt a plastic aspherical design. By reasonably matching the optical focal length, surface shape and distribution parameters, it is ensured that the lens has high imaging quality. While having high resolution, it also has the advantages of miniaturization and large aperture.

[0004] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0005] An optical lens with a large aperture and high resolution, the lens includes the following components from the object side to the image side along the optical axis:

[0006] The first lens has positive power, the object side surface of the first lens is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0007] The second lens has a negative optical power, the object side surface of the second lens is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0008] A third lens has optical power, wherein the object side surface of the third lens is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0009] A fourth lens has optical power, the object side surface of the fourth lens is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0010] A fifth lens element having positive refractive power, and an object side surface of the fifth lens element is convex near the optical axis;

[0011] A sixth lens element having negative power, wherein the object side surface of the sixth lens element is concave at the near optical axis, and the image side surface of the sixth lens element is concave at the near optical axis;

[0012] The lens satisfies the following conditional formula:

[0013] 1.8 <FNO<1.95

[0014] 40° <FOV<43.5°

[0015] -100 <R11 / |R12|<-2

[0016] 0.5 <TTL / IMG<0.61

[0017] Among them, FNO is the aperture size of the lens, FOV is half of the maximum field of view angle of the lens, R11 is the radius of curvature of the object side of the sixth lens, R12 is the radius of curvature of the image side of the sixth lens, TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, and IMG is the maximum imaging height of the lens.

[0018] By controlling FNO, the requirements of large aperture and high resolution can be met;

[0019] By controlling the maximum field of view of the lens, the visual range of the optical lens can be controlled while meeting high resolution.

[0020] By controlling the ratio of the radius of curvature of the sixth lens, the surface shape of the sixth lens can be adjusted, which helps to reduce the volume of the lens and improve the image quality;

[0021] By controlling the ratio of the total optical length and the maximum image height, a balance can be achieved between compressing the total length and increasing the imaging surface, achieving the characteristics of miniaturization while satisfying the advantages of high resolution and large target surface.

[0022] Furthermore, the number of lenses with optical power in the lens is 6 and all of them are plastic aspherical lenses.

[0023] Furthermore, the lens satisfies the following conditional formula:

[0024] 6 <TTL / BL<7.1

[0025] Wherein, TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, and BL is the distance from the image side of the sixth lens to the imaging plane on the optical axis.

[0026] By controlling this ratio, it is possible to effectively avoid excessive volume occupied due to uneven distribution of the total optical length and the optical back focus, which is very helpful in further compressing the overall length.

[0027] Furthermore, the lens satisfies the following conditional formula:

[0028] 0<|F / f3|<0.1

[0029] Among them, F is the focal length of the lens, and f3 is the focal length of the third lens.

[0030] By controlling this ratio, the refractive power in the optical system can be properly distributed, which is beneficial for correcting the aberration of the lens and reducing the sensitivity.

[0031] Furthermore, the lens satisfies the following conditional formula:

[0032] 2 <Y62 / Y41<2.65

[0033] Among them, Y41 is the maximum effective radius of the object side of the fourth lens, and Y62 is the maximum effective radius of the image side of the sixth lens.

[0034] By controlling this ratio, the effective radius of the object side of the fourth lens and the effective radius of the image side can be balanced, so as to increase the target surface, improve the resolution, and balance the lens space ratio.

[0035] Furthermore, the lens satisfies the following conditional formula:

[0036] 35 <V3<60

[0037] Wherein, V3 is the Abbe number of the third lens.

[0038] Furthermore, the lens satisfies the following conditional formula:

[0039] 0 <T23 / CT3<1.3

[0040] Wherein, T23 is the distance between the second lens and the third lens on the optical axis, and CT3 is the thickness of the third lens on the optical axis.

[0041] The beneficial effects of the present invention are:

[0042] The present invention provides a large aperture optical lens with high resolution, which is mainly composed of six lenses, and all six lenses adopt a plastic aspherical design. By reasonably matching the optical focal length, surface shape and distribution parameters, it is ensured that the lens has high imaging quality. While having high resolution, it also has the advantages of miniaturization and large aperture. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0044] Figure 2 axial chromatic aberration curve diagram of Example 1 of the present invention;

[0045] Figure 3 is an astigmatism curve diagram of Example 1 of the present invention;

[0046] Figure 4 is a distortion curve diagram of Example 1 of the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0048] Figure 6 axial chromatic aberration curve diagram of Example 2 of the present invention;

[0049] Figure 7 is an astigmatism curve diagram of Example 2 of the present invention;

[0050] Figure 8 is a distortion curve diagram of Example 2 of the present invention;

[0051] Fig. 9 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0052] Fig.10 axial chromatic aberration curve diagram of Example 3 of the present invention;

[0053] Fig.11 is an astigmatism curve diagram of Example 3 of the present invention;

[0054] Fig.12 is a distortion curve diagram of Example 3 of the present invention;

[0055] Fig.13 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0056] Fig.14 axial chromatic aberration curve diagram of Example 4 of the present invention;

[0057] Fig.15 is an astigmatism curve diagram of Example 4 of the present invention;

[0058] Fig.16 is a distortion curve diagram of Example 4 of the present invention;

[0059] Fig.17 This is a schematic diagram of the structure of Embodiment 5 of the present invention;

[0060] Fig.18 axial chromatic aberration curve diagram of Example 5 of the present invention;

[0061] Fig.19 is an astigmatism curve diagram of Example 5 of the present invention;

[0062] Fig. 20 This is a distortion curve diagram of Example 5 of the present invention.

[0063] In the figure: 1, first lens; 2, second lens; 3, third lens; 4, fourth lens; 5, fifth lens; 6, sixth lens; 7, aperture; 8, filter. DETAILED DESCRIPTION

[0064] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0065] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0066] In this document, the surface of each lens closest to the object is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface.

[0067] like Figure 1-20 As shown, an embodiment of the present invention provides a large aperture optical lens with high resolution, and the lens includes the following components from the object side to the image side along the optical axis:

[0068] The first lens 1 has positive power, the object side surface of the first lens 1 is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0069] The second lens 2 has a negative optical power, the object side surface of the second lens 2 is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0070] The third lens 3 has an optical power, the object side surface of the third lens 3 is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0071] The fourth lens 4 has an optical power, the object side surface of the fourth lens 4 is convex at the near optical axis, and the image side surface is concave at the near optical axis;

[0072] A fifth lens element 5 has positive refractive power, and an object side surface of the fifth lens element 5 is convex near the optical axis;

[0073] The sixth lens 6 has negative power, the object side surface of the sixth lens 6 is concave at the near optical axis, and the image side surface is concave at the near optical axis;

[0074] The lens satisfies the following conditional formula:

[0075] 1.8 <FNO<1.95

[0076] 40° <FOV<43.5°

[0077] -100 <R11 / |R12|<-2

[0078] 0.5 <TTL / IMG<0.61

[0079] Among them, FNO is the aperture size of the lens, FOV is half of the maximum field of view angle of the lens, R11 is the curvature radius of the object side of the sixth lens 6, R12 is the curvature radius of the image side of the sixth lens 6, TTL is the distance from the object side of the first lens 1 to the imaging plane on the optical axis, and IMG is the maximum imaging height of the lens.

[0080] By controlling FNO, the requirements of large aperture and high resolution can be met;

[0081] By controlling the maximum field of view of the lens, the visual range of the optical lens can be controlled while meeting high resolution.

[0082] By controlling the ratio of the curvature radius of the sixth lens 6, the surface shape of the sixth lens 6 can be adjusted, which helps to reduce the volume of the lens and improve the image quality;

[0083] By controlling the ratio of the total optical length and the maximum image height, a balance can be achieved between compressing the total length and increasing the imaging surface, achieving the characteristics of miniaturization while satisfying the advantages of high resolution and large target surface.

[0084] Specifically, the number of lenses with optical power in the lens is 6 and all of them are plastic aspherical lenses.

[0085] Specifically, the lens satisfies the following conditional formula:

[0086] 6 <TTL / BL<7.1

[0087] Wherein, TTL is the distance from the object side of the first lens 1 to the imaging plane on the optical axis, and BL is the distance from the image side of the sixth lens 6 to the imaging plane on the optical axis.

[0088] By controlling this ratio, it is possible to effectively avoid excessive volume occupied due to uneven distribution of the total optical length and the optical back focus, which is very helpful in further compressing the overall length.

[0089] Specifically, the lens satisfies the following conditional formula:

[0090] 0<|F / f3|<0.1

[0091] Wherein, F is the focal length of the lens, and f3 is the focal length of the third lens 3.

[0092] By controlling this ratio, the refractive power in the optical system can be properly distributed, which is beneficial for correcting the aberration of the lens and reducing the sensitivity.

[0093] Specifically, the lens satisfies the following conditional formula:

[0094] 2 <Y62 / Y41<2.65

[0095] Among them, Y41 is the maximum effective radius of the object side of the fourth lens 4, and Y62 is the maximum effective radius of the image side of the sixth lens 6.

[0096] By controlling this ratio, the effective radius of the object side of the fourth lens and the effective radius of the image side can be balanced, so as to increase the target surface, improve the resolution, and balance the lens space ratio.

[0097] Specifically, the lens satisfies the following conditional formula:

[0098] 35 <V3<60

[0099] Wherein, V3 is the Abbe number of the third lens 3.

[0100] Specifically, the lens satisfies the following conditional formula:

[0101] 0 <T23 / CT3<1.3

[0102] Wherein, T23 is the distance between the second lens 2 and the third lens 3 on the optical axis, and CT3 is the thickness of the third lens 3 on the optical axis.

[0103] The above-mentioned lens may further include a filter 8 for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface according to the specific needs of the embodiment. In the absence of specific requirements, the filter 8 or the protective glass may not be used.

[0104] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0105] Example 1

[0106] The present embodiment provides a large aperture optical lens with high resolution. The lens is composed of an aperture 7, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6 and a filter 8 in sequence from the object side to the image side along the optical axis. The incident light passes through the above components in sequence and is finally imaged on the image plane.

[0107] The first lens 1 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The second lens 2 has negative focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The third lens 3 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fourth lens 4 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fifth lens 5 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The sixth lens 6 has negative focal power, and its object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis. The filter 8 is arranged between the sixth lens 6 and the imaging surface of the lens.

[0108] Table 1 shows the surface type, radius of curvature, thickness and material properties of each lens in Example 1. The units of the radius of curvature and thickness are both millimeters (mm).

[0109] Table 1 is a table of lens parameters of Example 1.

[0110]

[0111] In this embodiment, the surface shape x of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

[0112]

[0113] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; A i The following Table 2 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspheric mirror surfaces that can be used in Example 1.

[0114] Table 2 is a table of high-order coefficients of various aspherical mirror surfaces in Example 1.

[0115]

[0116]

[0117] Please refer to Table 11 for the numerical values ​​of the relevant conditional expressions of this embodiment.

[0118] Table 1-2 and Figure 1-4 The lens shape and various properties of the lens of the current embodiment are shown, indicating that the lens has a high imaging quality, and meets the requirements that the lens has high resolution while also having the advantages of miniaturization and large aperture.

[0119] Example 2

[0120] The present embodiment provides a large aperture optical lens with high resolution. The lens is composed of an aperture 7, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6 and a filter 8 in sequence from the object side to the image side along the optical axis. The incident light passes through the above components in sequence and is finally imaged on the image plane.

[0121] The first lens 1 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The second lens 2 has negative focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The third lens 3 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fourth lens 4 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fifth lens 5 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The sixth lens 6 has negative focal power, and its object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis. The filter 8 is arranged between the sixth lens 6 and the imaging surface of the lens.

[0122] Table 3 shows the surface type, radius of curvature, thickness and material properties of each lens in Example 2. The units of the radius of curvature and thickness are both millimeters (mm).

[0123] Table 3 is a table of lens parameters of Example 2.

[0124]

[0125] In this embodiment, each aspheric surface shape can be defined by the formula (1) in the above embodiment 1. Table 4 below shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of each aspheric mirror surface that can be used in embodiment 2.

[0126] Table 4 is a table of high-order coefficients of each aspherical mirror surface in Example 2.

[0127]

[0128] Please refer to Table 11 for the numerical values ​​of the relevant conditional expressions of this embodiment.

[0129] Table 3-4 and Figure 5-8 The lens shape and various properties of the lens of the current embodiment are shown, indicating that the lens has a high imaging quality, and meets the requirements that the lens has high resolution while also having the advantages of miniaturization and large aperture.

[0130] Example 3

[0131] The present embodiment provides a large aperture optical lens with high resolution. The lens is composed of an aperture 7, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6 and a filter 8 in sequence from the object side to the image side along the optical axis. The incident light passes through the above components in sequence and is finally imaged on the image plane.

[0132] The first lens 1 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The second lens 2 has negative focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The third lens 3 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fourth lens 4 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fifth lens 5 has positive focal power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The sixth lens 6 has negative focal power, and its object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis. The filter 8 is arranged between the sixth lens 6 and the imaging surface of the lens.

[0133] Table 5 shows the surface type, radius of curvature, thickness and material properties of each lens in Example 3. The units of the radius of curvature and thickness are both millimeters (mm).

[0134] Table 5 is a table of lens parameters of Example 3.

[0135]

[0136]

[0137] In this embodiment, each aspheric surface shape can be defined by the formula (1) in the above embodiment 1. Table 6 below shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of each aspheric mirror surface that can be used in embodiment 3.

[0138] Table 6 is a table of high-order coefficients of each aspherical mirror surface in Example 3.

[0139]

[0140] Please refer to Table 11 for the numerical values ​​of the relevant conditional expressions of this embodiment.

[0141] Table 5-6 and Figure 9-12 The lens shape and various properties of the lens of the current embodiment are shown, indicating that the lens has a high imaging quality, and meets the requirements that the lens has high resolution while also having the advantages of miniaturization and large aperture.

[0142] Example 4

[0143] The present embodiment provides a large aperture optical lens with high resolution. The lens is composed of an aperture 7, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6 and a filter 8 in sequence from the object side to the image side along the optical axis. The incident light passes through the above components in sequence and is finally imaged on the image plane.

[0144] The first lens 1 has positive optical power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The second lens 2 has negative optical power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The third lens 3 has negative optical power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fourth lens 4 has negative optical power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fifth lens 5 has positive optical power, and its object side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis. The sixth lens 6 has negative optical power, and its object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis. The filter 8 is arranged between the sixth lens 6 and the imaging surface of the lens.

[0145] Table 7 shows the surface type, radius of curvature, thickness and material properties of each lens in Example 4. The units of the radius of curvature and thickness are both millimeters (mm).

[0146] Table 7 is a table of lens parameters of Example 4.

[0147]

[0148] In this embodiment, each aspheric surface shape can be defined by the formula (1) in the above embodiment 1. Table 8 below shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of each aspheric mirror surface that can be used in embodiment 4.

[0149] Table 8 is a table of high-order coefficients of each aspherical mirror surface in Example 4.

[0150]

[0151]

[0152] Please refer to Table 11 for the numerical values ​​of the relevant conditional expressions of this embodiment.

[0153] Table 5-6 and Figure 9-12 The lens shape and various properties of the lens of the current embodiment are shown, indicating that the lens has a high imaging quality, and meets the requirements that the lens has high resolution while also having the advantages of miniaturization and large aperture.

[0154] Example 5

[0155] The present embodiment provides a large aperture optical lens with high resolution. The lens is composed of an aperture 7, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6 and a filter 8 in sequence from the object side to the image side along the optical axis. The incident light passes through the above components in sequence and is finally imaged on the image plane.

[0156] The first lens 1 has positive optical power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The second lens 2 has negative optical power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The third lens 3 has negative optical power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fourth lens 4 has negative optical power, and its object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis. The fifth lens 5 has positive optical power, and its object side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis. The sixth lens 6 has negative optical power, and its object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis. The filter 8 is arranged between the sixth lens 6 and the imaging surface of the lens.

[0157] Table 9 shows the surface type, radius of curvature, thickness and material properties of each lens in Example 5. The units of the radius of curvature and thickness are both millimeters (mm).

[0158] Table 9 is a table of lens parameters of Example 5.

[0159]

[0160] In this embodiment, each aspheric surface type can be defined by the formula (1) in the above embodiment 1. Table 10 below shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of each aspheric mirror surface that can be used in embodiment 5.

[0161] Table 10 is a table of high-order coefficients of each aspherical mirror surface in Example 5.

[0162]

[0163] Please refer to Table 11 for the numerical values ​​of the relevant conditional expressions of this embodiment.

[0164] Table 9-0 and Figure 17-20 The lens shape and various properties of the lens of the current embodiment are shown, indicating that the lens has a high imaging quality, and meets the requirements that the lens has high resolution while also having the advantages of miniaturization and large aperture.

[0165] Table 11 is a numerical table of conditional formulas related to Examples 1-5.

[0166] Conditional expression Example 1 Example 2 Example 3 Example 4 Example 5 FNO 1.94 1.93 1.91 1.92 1.9 FOV 43.72° 43.78° 43.70° 43.65° 43.61° R11 / |R12 -3.08 -2.96 -2.85 -8.84 -6.53 TTL / IMG 0.578 0.579 0.586 0.592 0.587 TTL / BL 6.986 7.003 7.056 6.704 6.709 F / f3 0.013 0.003 0.003 0.005 0.004 Y62 / Y41 2.160 2.145 2.155 2.390 2.325 V3 55.924 55.987 55.987 56.110 56.110 T23 / CT3 1.221 1.259 1.071 0.953 1.108

[0167] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A large aperture optical lens with high resolution, characterized in that: The lens includes the following components along the optical axis from the object side to the image side: The first lens has positive power, the object side surface of the first lens is convex at the near optical axis, and the image side surface is concave at the near optical axis; The second lens has a negative optical power, the object side surface of the second lens is convex at the near optical axis, and the image side surface is concave at the near optical axis; A third lens has optical power, wherein the object side surface of the third lens is convex at the near optical axis, and the image side surface is concave at the near optical axis; A fourth lens has optical power, the object side surface of the fourth lens is convex at the near optical axis, and the image side surface is concave at the near optical axis; A fifth lens element having positive refractive power, and an object side surface of the fifth lens element is convex near the optical axis; A sixth lens element having negative power, wherein the object side surface of the sixth lens element is concave at the near optical axis, and the image side surface of the sixth lens element is concave at the near optical axis; The lens satisfies the following conditional formula: 1.8 <FNO<1.95 40° <FOV<43.5° -100 <R11 / |R12|<-2 0.5 <TTL / IMG<0.61 Among them, FNO is the aperture size of the lens, FOV is half of the maximum field of view angle of the lens, R11 is the radius of curvature of the object side of the sixth lens, R12 is the radius of curvature of the image side of the sixth lens, TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, and IMG is the maximum imaging height of the lens.

2. The optical lens with a large aperture and high resolution as claimed in claim 1, characterized in that: The lens has six lenses with optical power and all of them are plastic aspherical lenses.

3. The optical lens with high resolution and large aperture as claimed in claim 1, characterized in that: The lens satisfies the following conditional formula: 6 <TTL / BL<7.1 Wherein, TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, and BL is the distance from the image side of the sixth lens to the imaging plane on the optical axis.

4. The optical lens with a large aperture and high resolution as claimed in claim 1, characterized in that: The lens satisfies the following conditional formula: 0<|F / f3|<0.1 Among them, F is the focal length of the lens, and f3 is the focal length of the third lens.

5. The optical lens with large aperture and high resolution as claimed in claim 1, characterized in that: The lens satisfies the following conditional formula: 2 <Y62 / Y41<2.65 Among them, Y41 is the maximum effective radius of the object side of the fourth lens, and Y62 is the maximum effective radius of the image side of the sixth lens.

6. The optical lens with high resolution and large aperture as claimed in claim 1, characterized in that: The lens satisfies the following conditional formula: 35<V3<60 Wherein, V3 is the Abbe number of the third lens.

7. The optical lens with high resolution and large aperture as claimed in claim 1, characterized in that: The lens satisfies the following conditional formula: 0 <T23 / CT3<1.3 Wherein, T23 is the distance between the second lens and the third lens on the optical axis, and CT3 is the thickness of the third lens on the optical axis.

Images