A high-definition distortion-free mobile phone lens and imaging method thereof

Abstract

The invention relates to a high-definition distortion-free mobile phone lens and an imaging method, and a high-definition distortion-free mobile phone lens: the optical system comprises an aperture, a positive meniscus lens A1, a negative meniscus lens A2, a negative meniscus lens A3, a positive meniscus lens A4, and a negative lens A5, which are arranged in sequence from front to back along an incident light path. The invention has a reasonable design, a small overall volume, a short total length, and a light weight, and can meet the requirements of miniaturization. The DIS is less than ‑0.6%, the distortion is small, the image is almost distortion-free, the resolution is high, and the color reproduction is good.

Description

Technical Field

[0001] The invention relates to a high-definition distortion-free mobile phone lens and an imaging method thereof. Background Art

[0002] Currently, the overall size of mobile phone lenses is large and the total length is long, which cannot meet the needs of miniaturization. In addition, the distortion is large, usually greater than 2%, and the image restoration is inaccurate, the resolution is low, and the imaging quality is poor. In addition, the existing mobile phone lenses have large chromatic aberration and aberration, and the color restoration is poor. Summary of the invention

[0003] In view of the above problems existing in the existing lenses, the present invention proposes a high-definition distortion-free mobile phone lens and an imaging method thereof.

[0004] The solution adopted by the present invention to solve the technical problem is a high-definition distortion-free mobile phone lens: the optical system includes an aperture, a meniscus positive lens A1, a meniscus negative lens A2, a meniscus negative lens A3, a meniscus positive lens A4, and a negative lens A5, which are arranged in sequence from front to back along the incident light path.

[0005] Furthermore, the convex surface of the meniscus positive lens A1 faces the object side, and the concave surface of the meniscus positive lens A1 faces the image side; the convex surface of the meniscus negative lens A2 faces the object side, and the concave surface of the meniscus negative lens A2 faces the image side; the concave surface of the meniscus negative lens A3 faces the object side, and the convex surface of the meniscus negative lens A3 faces the image side; the concave surface of the meniscus positive lens A4 faces the object side, and the convex surface of the meniscus positive lens A4 faces the image side, the object measurement surface of the negative lens A5 is concave, the image measurement surface of the negative lens A5 is concave near the optical axis, and the image measurement surface of the negative lens A5 is convex away from the optical axis.

[0006] Furthermore, the meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 are respectively a low refractive index lens, a high refractive index lens, a high refractive index lens, a low refractive index lens, and a low refractive index lens.

[0007] Furthermore, the meniscus positive lens A1, the meniscus negative lens A2, the meniscus negative lens A3, the meniscus positive lens A4, and the negative lens A5 are all plastic aspheric lenses, and the aspheric curve equation is expressed as:

[0008]

[0009] Where: z is the depth of the aspheric surface; c is the curvature of the aspheric vertex; K is the cone coefficient; is the radial distance; r n is the normalized radius; u is r / r n ; a m is the mth order Q con Coefficient; Qm con is the mth order Q con Polynomial.

[0010] Furthermore, the focal lengths of the meniscus positive lens A1, the meniscus negative lens A2, the meniscus negative lens A3, the meniscus positive lens A4, and the negative lens A5 are set to f1, f2, f3, f4, and f5 in sequence, and the total focal length is set to f. The relationship between the focal lengths of the lenses is as follows: 0.3 <f1 / f<1、-2.5<f2 / f<-1、0.3<f4 / f<1.1。

[0011] Furthermore, the optical powers of the meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 are set to Φ1, Φ2, Φ3, Φ4, and Φ5 respectively, and the optical powers of each lens have the following relationship: 1≤|Φ1 / Φ2|≤3, 4≤|Φ2 / Φ3|≤5, 6≤|Φ4 / Φ3|≤8, 1≤|Φ5 / Φ4|≤2.5.

[0012] Furthermore, the lens dispersion coefficients of the meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 are set to be Vd1, Vd2, Vd3, Vd4, and Vd5 respectively, and the relationship between the lens dispersion coefficients is as follows: Vd1≥56, Vd2≤21, and Vd1-Vd2>35, Vd4≥56, Vd3≤21, and Vd4-Vd3>35, Vd5≥55.

[0013] Furthermore, the center thicknesses of the meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 on the optical axis are set to be TC1, TC2, TC3, TC4, and TC5 respectively, and the relationship between the center thicknesses of each lens on the optical axis is as follows: TC1<0.5, TC2>0.2, TC3>0.2, TC4<0.7, TC5<0.3; the sum of the thicknesses of each lens on the optical axis is ALT, the sum of the system air gaps is ALG, and ALT and ALG satisfy the following relationship: ALT<2, ALG<2.1, ALG / ALT<1.5.

[0014] An imaging method for a high-definition distortion-free mobile phone lens: light from the object side passes through an aperture, a positive meniscus lens A1, a negative meniscus lens A2, a negative meniscus lens A3, a positive meniscus lens A4, a negative lens A5, and a glass protective sheet of the lens in sequence, and then forms an image on an imaging surface.

[0015] Compared with the prior art, the present invention has the following beneficial effects: reasonable design, small overall volume, short total length, light weight, can achieve the requirements of miniaturization, DIS<-0.6%, small distortion, almost no image deformation, high resolution, and good color reproduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 A schematic diagram of the structure of the present invention;

[0018] Figure 2 Schematic diagram of the optical path of the present invention;

[0019] Figure 3 MTF curve diagram of Example 1 of the present invention;

[0020] Figure 4 Distortion diagram of embodiment 1 of the present invention;

[0021] Figure 5 Vertical axis chromatic aberration diagram of Example 1 of the present invention;

[0022] Figure 6 MTF curve diagram of Example 2 of the present invention;

[0023] Figure 7 Distortion diagram of embodiment 2 of the present invention;

[0024] Figure 8 Vertical axis chromatic aberration diagram of Example 2 of the present invention;

[0025] Fig. 9 MTF curve diagram of Example 3 of the present invention;

[0026] Fig.10 Distortion diagram of embodiment 3 of the present invention;

[0027] Fig.11 Vertical axis chromatic aberration diagram of Example 3 of the present invention;

[0028] In the figure: 1-aperture; 2-meniscus positive lens A1; 3-meniscus negative lens A2; 4-meniscus negative lens A3; 5-meniscus positive lens A4; 6-negative lens A5; 7-glass protection plate; 8-imaging surface. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figure 1 As shown, a high-definition distortion-free mobile phone lens: the optical system includes an aperture, a positive meniscus lens A1, a negative meniscus lens A2, a negative meniscus lens A3, a positive meniscus lens A4, and a negative lens A5, which are arranged in sequence from front to back along the incident light path; an aperture pre-positioned structure and 5 plastic aspherical lenses are adopted to shorten the total length of the system and optimize the image quality.

[0031] In this embodiment, the convex surface of the meniscus positive lens A1 faces the object side, and the concave surface of the meniscus positive lens A1 faces the image side; the convex surface of the meniscus negative lens A2 faces the object side, and the concave surface of the meniscus negative lens A2 faces the image side; the concave surface of the meniscus negative lens A3 faces the object side, and the convex surface of the meniscus negative lens A3 faces the image side; the concave surface of the meniscus positive lens A4 faces the object side, and the convex surface of the meniscus positive lens A4 faces the image side. The object side surface of the negative lens A5 is concave, the surface of the negative lens A5 near the optical axis on the image side is concave, and the surface of the negative lens A5 far from the optical axis on the image side is convex.

[0032] In this embodiment, the meniscus positive lens A1, the meniscus negative lens A2, the meniscus negative lens A3, the meniscus positive lens A4, and the negative lens A5 are a low-refractive-index lens, a high-refractive-index lens, a high-refractive-index lens, a low-refractive-index lens, and a low-refractive-index lens respectively; the optical system has a five-lens combination structure of "positive lens - negative lens - negative lens - positive lens - negative lens" and a refractive index combination of "low refractive index - high refractive index - high refractive index - low refractive index - low refractive index", effectively improving the tolerance characteristics of the lens, effectively reducing various aberrations, improving the resolution, being smaller in size, and being easy to manufacture.

[0033] In this embodiment, the meniscus positive lens A1, the meniscus negative lens A2, the meniscus negative lens A3, the meniscus positive lens A4, and the negative lens A5 are all plastic aspherical lenses, and the expression of the aspherical curve equation is:

[0034]

[0035] Where: z is the depth of the aspherical surface (the vertical distance between a point on the aspherical surface at a radial distance y from the optical axis and the tangent plane at the vertex of the aspherical surface on the optical axis); c is the curvature of the aspherical vertex; K is the conic coefficient; is the radial distance; r n is the normalized radius; u is r / r n ; a m is the m-th order Q con coefficient; Q m con is the m-th order Q con polynomial.

[0036] In this embodiment, the lens focal lengths of the meniscus positive lens A1, the meniscus negative lens A2, the meniscus negative lens A3, the meniscus positive lens A4, and the negative lens A5 are set to f1, f2, f3, f4, and f5 in sequence, and the total focal length is set to f. The relationships between the focal lengths of each lens are as follows: 0.3 < f1 / f < 1, -2.5 < f2 / f < -1, 0.3 < f4 / f < 1.1; making the optical system more miniaturized, with a shorter overall length, and simultaneously correcting the aberrations of the system.

[0037] In this embodiment, the optical powers of the meniscus positive lens A1, the meniscus negative lens A2, the meniscus negative lens A3, the meniscus positive lens A4, and the negative lens A5 are set to Φ1, Φ2, Φ3, Φ4, and Φ5 respectively, and the optical powers of the lenses are related as follows: 1≤|Φ1 / Φ2|≤3, 4≤|Φ2 / Φ3|≤5, 6≤|Φ4 / Φ3|≤8, 1≤|Φ5 / Φ4|≤2.5; while maintaining small distortion, the total optical length of the lens is compressed, so that the optical system structure is compact, which is conducive to saving use costs.

[0038] In this embodiment, the lens dispersion coefficients of the meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 are set to be Vd1, Vd2, Vd3, Vd4, and Vd5 respectively, and the relationship between the lens dispersion coefficients is as follows: Vd1≥56, Vd2≤21, and Vd1-Vd2>35, Vd4≥56, Vd3≤21, and Vd4-Vd3>35, Vd5≥55; effectively control chromatic aberration, optimize image quality, and improve system performance.

[0039] In this embodiment, the center thicknesses of the meniscus positive lens A1, the meniscus negative lens A2, the meniscus negative lens A3, the meniscus positive lens A4, and the negative lens A5 on the optical axis are set to be TC1, TC2, TC3, TC4, and TC5, respectively. The relationship between the center thicknesses of each lens on the optical axis is as follows: TC1<0.5, TC2>0.2, TC3>0.2, TC4<0.7, and TC5<0.3; the sum of the thicknesses of each lens on the optical axis is ALT, the sum of the system air gaps is ALG, and ALT and ALG satisfy the following relationship: ALT<2, ALG<2.1, ALG / ALT<1.5.

[0040] Now we provide a specific lens parameter to meet the above requirements;

[0041] Table 1 Parameters of the first embodiment

[0042] surface Radius of curvature thickness Material Refractive Index Dispersion coefficient focal length 0 Subject surface Infinity 1150 1 Aperture Infinity -0.23 2 First lens 1.27 0.47 plastic 1.54 56.11 2.70 3 8.15 0.08 4 Second lens -12.44 0.21 plastic 1.66 20.41 -6.39 5 6.31 0.31 6 The third lens 14.34 0.22 plastic 1.66 20.41 -23.92 7 7.43 0.40 8 The fourth lens -9.74 0.61 plastic 1.54 56.11 2.44 9 -1.19 0.56 10 Fifth lens -1.82 0.25 plastic 1.54 55.71 -1.93 11 2.47 0.30 12 Protective sheet <![CDATA[Infinit y ]]> 0.21 Glass 1.52 64.17 <![CDATA[Infinit y ]]> 13 Infinity 0.34 14 Imaging surface Infinity

[0043] Table 2 Aspheric coefficients of the first embodiment (1)

[0044] surface 2 3 4 5 6 K＝ -3.15E-01 -4.73E+00 1.00E+02 3.42E+01 -9.53E+01 A4＝ 1.85E+02 -1.36E+03 -7.74E+02 -1.25E+02 -3.67E+03 A6＝ 6.04E+04 1.36E+05 1.01E+06 9.27E+05 -3.77E+05 A8＝ -1.28E+08 8.55E+07 -3.02E+08 -2.15E+08 1.82E+08 A10＝ 7.40E+10 -8.80E+09 7.57E+10 1.94E+10 -4.48E+10 A12＝ -2.40E+13 4.07E+13 -1.03E+13 9.08E+12 3.92E+12 A14＝ 4.67E+15 -1.16E+16 -6.49E+14 -3.43E+15 1.18E+15 A16＝ -5.98E+17 1.90E+18 4.69E+17 5.12E+17 -4.19E+17 A18＝ 4.90E+19 -1.59E+20 -6.39E+19 -3.24E+19 5.48E+19 A20＝ -2.00E+21 5.33E+21 2.95E+21 5.65E+20 -2.64E+21

[0045] Table 2 Aspheric coefficients of the first embodiment (2)

[0046] surface 7 8 9 10 11 K＝ -4.24E+01 -1.00E+02 -2.69E+00 -2.78E+00 -1.81E+01 A4＝ -3.38E+03 3.01E+02 4.66E+02 1.35E+02 -6.52E+02 A6＝ 1.09E+05 -1.79E+05 -1.48E+05 .9.67E+04 1.88E+04 A8＝ -7.51E+07 4.36E+07 4.47E+07 6.49E+06 -1.02E+06 A10＝ 4.04E+10 -8.58E+09 -8.15E+09 -6.17E+07 6.27E+07 A12＝ -1.26E+13 1.02E+12 9.08E+11 -9.16E+09 -2.75E+09 A14＝ 2.45E+15 -7.23E+13 -6.04E+13 4.38E+11 7.32E+10 A16＝ -2.87E+17 2.90E+15 2.34E+15 -9.01E+12 -1.15E+12 A18＝ 1.99E+19 -5.98E+16 -4.98E+16 9.08E+13 9.96E+12 A20＝ -5.30E+20 4.85E+17 4.29E+17 -3.29E+14 -3.72E+13

[0047] The focal length of the lens is f = 3.4mm, the aperture value is FNO = 2.3, the field of view angle FOV = 82.2°, the image plane Φ = 6mm, and the total length TTL = 3.96mm. Figure 3-5, which are respectively the MTF curve diagram, distortion diagram, and vertical axis chromatic aberration diagram of this embodiment.

[0048] Now a second embodiment is provided: the specific lens parameters meet the above requirements;

[0049] Table 3 Parameters of the second embodiment

[0050] surface Radius of curvature thickness Material Refractive Index Dispersion coefficient focal length 0 Subject surface Infinitv 1150 1 Aperture Infinity -0.23 2 First lens 1.27 0.47 plastic 1.54 56.11 2.71 3 8.08 0.07 4 Second lens -13.22 0.21 plastic 1.66 20.41 -6.45 5 6.22 0.31 6 The third lens 14.54 0.22 plastic 1.66 20.41 -27.98 7 8.05 0.41 8 The fourth lens -10.34 0.62 plastic 1.54 56.11 2.46 9 -1.20 0.56 10 Fifth lens -1.79 0.24 plastic 1.54 55.71 -1.94 11 2.56 0.30 12 Protective sheet Infinity 0.21 Glass 1.52 64.17 Infinity 13 Infinitv 0.34 14 Imaging surface Infinitv

[0051] Table 4 Aspheric coefficients of the second embodiment

[0052] surface 2 3 4 5 6 K＝ -3.30E-01 -2.00E+00 8.30E+01 3.14E+01 -2.19E+02 A4＝ 1.77E+02 -1.35E+03 -7.58E+02 -1.58E+02 -3.63E+03 A6＝ 5.73E+04 1.34E+05 1.02E+06 9.36E+05 -3.70E+05 A8＝ -1.26E+08 8.50E+07 -3.01E+08 -2.15E+08 1.87E+08 A10＝ 7.39E+10 -8.69E+10 7.58E+10 1.87E+10 -4.41E+10 A12＝ -2.40E+13 4.07E+13 -1.03E+13 9.04E+12 3.54E+12 A14＝ 4.67E+15 -1.16E+16 -6.56E+14 -3.40E+15 1.05E+15 A16＝ -5.97E+17 1.88E+18 4.67E+17 5.20E+17 -4.07E+17 A18＝ 4.89E+20 -1.60E+20 -6.40E+19 -3.76E+19 6.23E+19 A20＝ -2.02E+21 5.28E+21 2.98E+21 9.32E+20 -3.68E+21 surface 7 8 9 10 11 K＝ -3.40E+01 -5.42E+01 -2.69E+00 -2.93E+00 -1.79E+01 A4＝ -3.26E+03 2.81E+02 4.59E+02 1.84E+02 -6.17E+02 A6＝ 1. 03E+05 -1.78E+05 -1.48E+05 -9.59E+04 1.89E+04 A8＝ -7.39E+07 4.38E+07 4.47E+07 6.51E+06 -1.01E+06 A10＝ 4.08E+10 -8.38E+09 -8.15E+09 -6.16E+07 6.31E+07 A12＝ -1.26E+13 1.02E+12 9.08E+11 -9.15E+09 -2.75E+09 A14＝ 2.44E+15 -7.25E+13 -6.04E+13 4.39E+11 7.32E+10 A16＝ -2.87E+17 2.90E+15 2.34E+15 -9.00E+12 -1.18E+12 A18＝ 1.92E+19 -5.98E+16 -4.88E+16 9.07E+13 9.96E+12 A20＝ -5.62E+20 4.80E+17 4.29E+17 -3.46E+14 -3.61E+13

[0053] The focal length of the lens is f=3.4mm, the aperture value is FN0=2.3, the field of view angle FOV=82.2°, the image plane Φ=6mm, and the total length TTL=3.96mm. Figure 6-8 , which are respectively the MTF curve diagram, distortion diagram, and vertical axis chromatic aberration diagram of this embodiment.

[0054] Now a third embodiment is provided: the specific lens parameters meet the above requirements;

[0055] Table 3 Parameters of the third embodiment

[0056] surface Radius of curvature thickness Material Refractive Index Dispersion coefficient focal length 0 Subject surface Infinitv 1150 1 Aperture Infinity -0.23 2 First lens 1.26 0.47 plastic 1.54 56.11 2.70 3 7.99 0.08 4 Second lens -12.76 0.21 plastic 1.66 20.41 -6.39 5 6.24 0.31 6 First lens 16.29 0.22 plastic 1.66 20.41 -25.16 7 8.14 0.41 8 The fourth lens -10.69 0.62 plastic 1.54 56.11 2.46 9 -1.21 0.56 10 Fifth lens -1.79 0.25 plastic 1.54 55.71 -1.94 11 2.57 0.30 12 Protective sheet Infinity 0.21 Glass 1.52 64.17 Infinitv 13 Infinitv 0.34 14 Imaging surface Infinitv

[0057] Table 4 Aspheric coefficients of the third embodiment

[0058] surface 2 3 4 5 6 K＝ -3.17E-01 -3.55E+00 9.38E+01 3.33E+01 -1.65E+02 A4＝ 1.85E+02 -1.36E+03 -7.69E+02 -1.41E+02 -3.68E+03 A6＝ 5.94E+04 1.33E+05 1.11E+06 9.26E+05 -3.72E+05 A8＝ -1.26E+08 8.55E+07 -3.02E+08 -2.15E+08 1.85E+08 A10＝ 7.40E+10 -8.68E+10 7.57E+10 1.91E+10 -4.45E+10 A12＝ -2.40E+13 4.17E+13 -1.03E+13 9.03E+12 3.74E+12 A14＝ 4.67E+15 -1.16E+16 -6.53E+14 -3.43E+15 1.10E+15 A16＝ -5.98E+17 1.88E+18 4.68E+17 5.15E+17 -4.28E+17 A18＝ 4.90E+19 -1.59E+20 -6.39E+19 -3.40E+19 6.28E+19 A20＝ -2.01E+21 5.33E+21 2.97E+21 6.51E+20 -3.49E+21 surface 7 8 9 10 11 K＝ -3.77E+01 -7.83E+01 -2.76E+00 -2.99E+00 -1.82E+01 A4＝ -3.17E+03 2.91E+02 4.81E+02 1.63E+02 -6.28E+02 A6＝ 1.03E+05 -1.80E+05 -1.49E+05 -9.51E+04 1.91E+04 A8＝ -7.46E+07 4.37E+07 4.47E+07 6.58E+06 -1.02E+06 A10＝ 4.06E+10 -8.37E+09 -8.15E+09 -6.27E+07 6.29E+07 A12＝ -1.26E+13 1.12E+12 9.08E+11 -9.16E+09 -2.85E+09 A14＝ 2.45E+15 -7.23E+13 -6.04E+13 4.39E+11 7.31E+10 A16＝ -2.88E+17 2.90E+15 2.34E+15 -9.00E+12 -1.15E+12 A18＝ 1.90E+19 -5.98E+16 -4.88E+16 9.20E+13 9.96E+12 A20＝ -5.45E+20 4.83E+17 4.28E+17 -3.70E+14 -3.60E+13

[0059] The focal length of the lens is f=3.4mm, the aperture value is FNO=2.38, the field of view angle FOV=82.2°, the image plane Φ=6mm, and the total length TTL=3.96mm. Figure 9-11 , which are respectively the MTF curve diagram, distortion diagram, and vertical axis chromatic aberration diagram of this embodiment.

[0060] An imaging method for a high-definition distortion-free mobile phone lens: light from the object side passes through an aperture, a positive meniscus lens A1, a negative meniscus lens A2, a negative meniscus lens A3, a positive meniscus lens A4, a negative lens A5, and a glass protective sheet of the lens in sequence, and then forms an image on an imaging surface.

[0061] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0062] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0063] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0064] In addition, the orientations or positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" used in any of the technical solutions disclosed in the above-mentioned invention are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent. Unless otherwise stated, the terms used to indicate shapes used in any of the technical solutions disclosed in the above-mentioned invention include shapes that are approximate, similar, or close to them.

[0065] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A high-definition distortion-free mobile phone lens, characterized by: The lens is composed of an aperture, a positive meniscus lens A1, a negative meniscus lens A2, a negative meniscus lens A3, a positive meniscus lens A4, and a negative lens A5, which are arranged in sequence from front to back along the incident light path; The center thicknesses of the meniscus positive lens A1, the meniscus negative lens A2, the meniscus negative lens A3, the meniscus positive lens A4, and the negative lens A5 on the optical axis are set to be TC1, TC2, TC3, TC4, and TC5 in sequence, and the center thicknesses of the lenses on the optical axis are as follows: TC1<0.5, TC2>0.2, TC3>0.2, TC4<0.7, and TC5<0.3; the sum of the thicknesses of the lenses on the optical axis is ALT, the sum of the system air gaps is ALG, and ALT and ALG satisfy the following relationship: ALT<2, ALG<2.1, and ALG / ALT<1.5; The convex surface of the meniscus positive lens A1 faces the object side, and the concave surface of the meniscus positive lens A1 faces the image side; the convex surface of the meniscus negative lens A2 faces the object side, and the concave surface of the meniscus negative lens A2 faces the image side; the concave surface of the meniscus negative lens A3 faces the object side, and the convex surface of the meniscus negative lens A3 faces the image side; the concave surface of the meniscus positive lens A4 faces the object side, and the convex surface of the meniscus positive lens A4 faces the image side; the object measurement surface of the negative lens A5 is concave, the image measurement surface of the negative lens A5 is concave near the optical axis, and the image measurement surface of the negative lens A5 is convex away from the optical axis.

2. A high-definition distortion-free mobile phone lens according to claim 1, characterized in that: The meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 are respectively a low refractive index lens, a high refractive index lens, a high refractive index lens, a low refractive index lens, and a low refractive index lens.

3. A high-definition distortion-free mobile phone lens according to claim 2, characterized in that: The meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 are all plastic aspheric lenses, and the aspheric curve equation is expressed as: Where: z is the depth of the aspheric surface; c is the curvature of the aspheric vertex; K is the cone coefficient; is the radial distance; r n is the normalized radius; u is r / r n ; a m is the mth order Q con Coefficient; Q m con is the mth order Q con Polynomial.

4. The high-definition distortion-free mobile phone lens according to claim 3, characterized in that: The focal lengths of the meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 are set to f1, f2, f3, f4, and f5 in sequence, and the total focal length is set to f. The relationship between the focal lengths of the lenses is as follows: 0.3 <f1 / f<1、-2.5<f2 / f<-1、0.3<f4 / f<1.1。 5. The high-definition distortion-free mobile phone lens according to claim 4, characterized in that: The optical powers of the meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4 and negative lens A5 are set to Φ1, Φ2, Φ3, Φ4 and Φ5 respectively, and the optical powers of each lens have the following relationship: 1≤|Φ1 / Φ2|≤3, 4≤|Φ2 / Φ3|≤5, 6≤|Φ4 / Φ3|≤8, 1≤|Φ5 / Φ4|≤2.

5.

6. The high-definition distortion-free mobile phone lens according to claim 5, characterized in that: The lens dispersion coefficients of the meniscus positive lens A1, meniscus negative lens A2, meniscus negative lens A3, meniscus positive lens A4, and negative lens A5 are set to be Vd1, Vd2, Vd3, Vd4, and Vd5 in sequence, and the relationship between the lens dispersion coefficients is as follows: Vd1≥56, Vd2≤21, and Vd1-Vd2>35, Vd4≥56, Vd3≤21, and Vd4-Vd3>35, Vd5≥55.

7. An imaging method of a high-definition distortion-free mobile phone lens, using the high-definition distortion-free mobile phone lens as claimed in claim 6, characterized in that: The light from the object side passes through the aperture, the positive meniscus lens A1, the negative meniscus lens A2, the negative meniscus lens A3, the positive meniscus lens A4, the negative lens A5, and the glass protective plate of the lens in sequence, and then forms an image on the imaging surface.

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