Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens, which sequentially comprises a first lens with positive refractive power, a second lens with refractive power, a third lens with positive refractive power and a fourth lens with negative refractive power from an object side to an image side, the following relational expressions are satisfied: 0.15 < = d6 / TTL < = 0.25; 0.80 < = f1 / f < = 0.95; 0.97 < = TTL / f < = 1.20; 4.00 < = (R5 + R6) / (R5-R6) < = 60.00; 0.30 < = d3 / d5 < = 1.20.

Description

Technical Field

[0001] The present invention relates to the field of optical lenses, and in particular to a camera optical lens suitable for portable terminal devices such as smart phones and digital cameras, as well as camera devices such as monitors and PC lenses. Background Art

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera optical lenses has been increasing. Due to the reduction in the pixel size of photosensitive devices and the trend of today's electronic products to have good functions and a thin and portable appearance, miniaturized camera optical lenses with good imaging quality have become the mainstream in the current market. In order to obtain better imaging quality, a multi-piece lens structure is often used. In addition, with the development of technology and the increase in the diversified needs of users, as the pixel area of ​​photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, a four-piece lens structure has gradually appeared in lens design. There is an urgent need for camera optical lenses with good optical performance. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a camera optical lens having design requirements for good optical performance.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a camera optical lens, which comprises, from the object side to the image side, a first lens with positive refractive power, a second lens with refractive power, a third lens with positive refractive power, and a fourth lens with negative refractive power;

[0005] Among them, the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, the focal length of the first lens is f1, the axial thickness of the second lens is d3, the axial thickness of the third lens is d5, the axial distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, and the following relationship is satisfied:

[0006] 0.15≤d6 / TTL≤0.25;

[0007] 0.80≤f1 / f≤0.95;

[0008] 0.97≤TTL / f≤1.20;

[0009] 4.00≤(R5+R6) / (R5-R6)≤60.00;

[0010] 0.30≤d3 / d5≤1.20.

[0011] Preferably, the focal length of the fourth lens is f4, and satisfies the following relationship:

[0012] -1.40≤f4 / f≤-0.90.

[0013] Preferably, the central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, and the following relationship is satisfied:

[0014] 1.50≤R7 / R8≤5.00.

[0015] Preferably, the object side surface of the first lens is convex at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; the axial thickness of the first lens is d1, the central curvature radius of the object side surface of the first lens is R1, and the central curvature radius of the image side surface of the first lens is R2, and the following relationship is satisfied:

[0016] -5.64≤(R1+R2) / (R1-R2)≤-1.37;

[0017] 0.06≤d1 / TTL≤0.20.

[0018] Preferably, the focal length of the second lens is f2, the central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, and the following relationship is satisfied:

[0019] -48.20≤f2 / f≤143.29;

[0020] -10.18≤(R3+R4) / (R3-R4)≤1.99;

[0021] 0.02≤d3 / TTL≤0.15.

[0022] Preferably, the object side surface of the third lens is concave at the paraxial position, and the image side surface of the third lens is convex at the paraxial position; the focal length of the third lens is f3, and satisfies the following relationship:

[0023] 1.13≤f3 / f≤13.05;

[0024] 0.03≤d5 / TTL≤0.19.

[0025] Preferably, the object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is concave at the paraxial position; the central curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, the axial thickness of the fourth lens is d7, and the following relationship is satisfied:

[0026] 0.75≤(R7+R8) / (R7-R8)≤6.43;

[0027] 0.04≤d7 / TTL≤0.22.

[0028] Preferably, the aperture value FNO of the camera optical lens is less than or equal to 2.45.

[0029] Preferably, the image height of the camera optical lens is IH, and satisfies the following relationship:

[0030] TTL / IH≤1.16.

[0031] Preferably, the combined focal length of the first lens and the second lens is f12, and satisfies the following relationship:

[0032] 0.42≤f12 / f≤1.58.

[0033] The beneficial effect of the present invention is that the camera optical lens according to the present invention has excellent optical characteristics and good optical performance, and is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0035] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0036] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0037] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0038] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0039] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0040] Figure 6 yes Figure 5Schematic diagram of axial aberration of the camera optical lens shown;

[0041] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0042] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0043] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0044] Fig.10 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0045] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0046] Fig.12 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0047] Fig.13 is a schematic structural diagram of a camera optical lens according to a fourth embodiment of the present invention;

[0048] Fig.14 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0049] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0050] Fig.16 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0051] Fig.17 is a schematic structural diagram of an imaging optical lens according to a fifth embodiment of the present invention;

[0052] Fig.18 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0053] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0054] Fig. 20 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0055] Fig.21 is a schematic structural diagram of a camera optical lens according to a comparative embodiment of the present invention;

[0056] Fig. 22 yes Fig.21 Schematic diagram of axial aberration of the camera optical lens shown;

[0057] Fig.23 yes Fig.21 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0058] Fig.24 yes Fig.21 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical scheme and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0060] Reference Figure 1-20 The present invention provides a camera optical lens 10, 20, 30, 40, 50. Figure 1 , 5 , 9, 13, and 17 show the camera optical lenses 10, 20, 30, 40, and 50 of the present invention, respectively. The camera optical lenses 10, 20, 30, 40, and 50 include 4 lenses in total, specifically, from the object side to the image side, they are: aperture S1, first lens L1, second lens L2, third lens L3, and fourth lens L4. An optical element such as an optical filter GF may be provided between the fourth lens L4 and the image plane Si.

[0061] The first lens L1 has positive refractive power, the second lens L2 has refractive power, the third lens L3 has positive refractive power, and the fourth lens L4 has negative refractive power. In other optional embodiments, the refractive power of the above lenses can also be set to other positive or negative distributions.

[0062] The axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4 is defined as d6, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.15≤d6 / TTL≤0.25. The relationship specifies the ratio of the spacing between the third lens and the fourth lens to the total optical length. Within the range of the relationship, it helps to buffer the change in the incident angle of the wide viewing angle light, so that it can propagate smoothly in the optical imaging lens group, so that the camera optical lens has better imaging quality and lower sensitivity.

[0063] The focal length of the first lens L1 is defined as f1, the focal length of the camera optical lens is defined as f, and the following relationship is satisfied: 0.80≤f1 / f≤0.95. The relationship specifies the ratio of the focal lengths of the first lens L1 and the camera optical lens. By reasonably allocating the optical focal lengths of the camera optical lens, the degree of deviation of light passing through the lens can be mitigated within the range of the relationship, and chromatic aberration can be effectively corrected to make the chromatic aberration |LC|≤7.0μm.

[0064] In addition, the camera optical lens also satisfies the following relationship: 0.97≤TTL / f≤1.20, which specifies the telephoto ratio. By being less than the upper limit value of the relationship, the total optical length can be controlled to be shortened, making it easy to achieve miniaturization. On the other hand, by being greater than the lower limit value of the relationship, it is easy to correct distortion and axial chromatic aberration, and good optical performance can be maintained.

[0065] The central curvature radius of the object side surface of the third lens L3 is defined as R5, the central curvature radius of the image side surface of the third lens L3 is defined as R6, and the following relationship is satisfied: 4.00≤(R5+R6) / (R5-R6)≤60.00. This relationship specifies the shape of the third lens L3, which is beneficial to correcting the astigmatism and distortion of the camera optical lens, making the distortion |Distortion|≤2.5%, and reducing the possibility of vignetting.

[0066] The on-axis thickness of the second lens L2 is defined as d3, and the on-axis thickness of the third lens L3 is defined as d5, and the following relationship is satisfied: 0.30≤d3 / d5≤1.20. The relationship specifies the ratio of the on-axis thickness of the second lens L2 to the on-axis thickness of the third lens L3, which helps to compress the total optical length of the camera optical lens within the range of the relationship.

[0067] When the above relationship expressions are satisfied, the camera optical lenses 10, 20, 30, 40, 50 have good optical performance and can meet the design requirements of large aperture, wide angle and ultra-thinness. According to the characteristics of the camera optical lenses 10, 20, 30, 40, 50, the camera optical lenses 10, 20, 30, 40, 50 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0068] Based on the above relationship and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0069] The object side surface of the first lens L1 is convex at the paraxial position, and the image side surface of the first lens L1 is concave at the paraxial position; the object side surface of the third lens L3 is concave at the paraxial position, and the image side surface of the third lens L3 is convex at the paraxial position; the object side surface of the fourth lens L4 is convex at the paraxial position, and the image side surface of the fourth lens L4 is convex at the paraxial position. In other optional embodiments, the object side surface and image side surface of the above lenses can also be set to other concave and convex distributions.

[0070] The focal length of the fourth lens L4 is defined as f4, and satisfies the following relationship: -1.40≤f4 / f≤-0.90. The relationship specifies the ratio of the focal lengths of the fourth lens L4 and the imaging optical lens 10. By reasonably allocating the optical focal length of the imaging optical lens, the imaging optical lens can have good sensitivity performance while meeting the design of a large aperture.

[0071] The central curvature radius of the object side surface of the fourth lens L4 is defined as R7, the central curvature radius of the image side surface of the fourth lens L4 is defined as R8, and the following relationship is satisfied: 1.50≤R7 / R8≤5.00. The relationship specifies the shape of the fourth lens L4. Within the range of the relationship, it is beneficial to alleviate the degree of deflection of light passing through the lens, and can effectively reduce aberrations.

[0072] The central curvature radius of the object side of the first lens L1 is R1, and the central curvature radius of the image side of the first lens L2 is R2, which satisfies the following relationship: -5.64≤(R1+R2) / (R1-R2)≤-1.37, which specifies the shape of the first lens L1. Within this range, it is helpful to achieve an ultra-wide angle. Preferably, -3.52≤(R1+R2) / (R1-R2)≤-1.72 is satisfied.

[0073] The axial thickness of the first lens L1 is d1, which satisfies the following relationship: 0.06≤d1 / TTL≤0.20. Within the conditional range, it is conducive to miniaturization. Preferably, 0.10≤d1 / TTL≤0.16 is satisfied.

[0074] The focal length of the second lens L2 is f2, which satisfies the following relationship: -48.20≤f2 / f≤143.29, which specifies the ratio of the focal length f2 of the second lens L2 to the focal length f of the camera optical lens. Within this range, the field curvature of the system can be effectively balanced. Preferably, -30.12≤f2 / f≤114.64 is satisfied.

[0075] The central curvature radius of the object side of the second lens L2 is R3, and the central curvature radius of the image side of the second lens L2 is R4, which satisfies the following relationship: -10.18≤(R3+R4) / (R3-R4)≤1.99, which specifies the shape of the second lens L2. Within this range, it is helpful to achieve an ultra-wide angle. Preferably, -6.36≤(R3+R4) / (R3-R4)≤1.59 is satisfied.

[0076] The camera optical lens also satisfies the following relationship: 0.02≤d3 / TTL≤0.15, which is conducive to miniaturization within the range of the relationship. Preferably, 0.03≤d3 / TTL≤0.12 is satisfied.

[0077] The focal length of the third lens L3 is f3, which satisfies the following relationship: 1.13≤f3 / f≤13.05. Through the reasonable distribution of the optical power, the system has better imaging quality and lower sensitivity. Preferably, 1.82≤f3 / f≤10.44 is satisfied.

[0078] The camera optical lens also satisfies the following relationship: 0.03≤d5 / TTL≤0.19, which is conducive to miniaturization within the range of the relationship. Preferably, 0.05≤d5 / TTL≤0.15 is satisfied.

[0079] The central curvature radius of the object side of the fourth lens L4 is R7, the central curvature radius of the image side of the fourth lens L4 is R8, and the following relationship is satisfied: 0.75≤(R7+R8) / (R7-R8)≤6.43, which specifies the shape of the fourth lens L4. When it is within the range, with the development of ultra-thin wide-angle, it is beneficial to correct the aberration of the off-axis picture angle and other problems. Preferably, 1.20≤(R7+R8) / (R7-R8)≤5.14 is satisfied.

[0080] The axial thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.04≤d7 / TTL≤0.22. Within the range of the relationship, it is beneficial to achieve miniaturization. Preferably, 0.07≤d7 / TTL≤0.17 is satisfied.

[0081] The first lens L1, the second lens L2, the third lens L3 and the fourth lens L4 are all made of plastic. In other optional implementations, each lens may also be made of other materials.

[0082] The field of view of the camera optical lens 10 in the diagonal direction is defined as FOV, which satisfies the following relationship: FOV≥79.93°, thereby facilitating wide-angle viewing. Preferably, FOV≥81.56° is satisfied.

[0083] The image height of the camera optical lens 10 is IH, and satisfies the following relationship: TTL / IH≤1.16, which is conducive to miniaturization and ultra-thinness.

[0084] The aperture value FNO of the camera optical lens is less than or equal to 2.45, thereby achieving a large aperture and good imaging performance of the camera optical lens.

[0085] The combined focal length of the first lens L1 and the second lens L2 is f12, and satisfies the following relationship: 0.42≤f12 / f≤1.58, which specifies the ratio of the combined focal length f12 of the first lens L1 and the second lens L2 to the focal length f of the camera optical lens 10. Within the range of the relationship, the aberration and distortion of the camera optical lens 10 can be eliminated, and the back focal length of the camera optical lens 10 can be suppressed to maintain the miniaturization of the camera optical lens. Preferably, 0.67≤f12 / f≤1.26.

[0086] The following examples are used to illustrate the imaging optical lens of the present invention. The symbols recorded in each example are as follows: The focal length, axial distance, central curvature radius, and axial thickness are in units of mm.

[0087] TTL: total optical length (the axial distance from the object side of the first lens L1 to the image surface Si), in mm;

[0088] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0089] Next, the technical solution of the present invention is specifically described with five implementation modes. At the same time, a comparative implementation mode is provided as a reference. When the range of the above relationship is exceeded, the technical effect of the present invention cannot be achieved.

[0090] (First Embodiment)

[0091] Table 1 shows design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0092] The second lens L2 has positive refractive power, the object side surface of the second lens L2 is convex at the paraxial position, and the image side surface of the second lens L2 is concave at the paraxial position.

[0093]

Table 1

[0094]

[0095] The meaning of each symbol is as follows.

[0096] S1: aperture;

[0097] R: radius of curvature at the center of the optical surface;

[0098] R1: the central curvature radius of the object side of the first lens L1;

[0099] R2: the central curvature radius of the image side surface of the first lens L1;

[0100] R3: the central curvature radius of the object side surface of the second lens L2;

[0101] R4: the central curvature radius of the image side surface of the second lens L2;

[0102] R5: the central curvature radius of the object side surface of the third lens L3;

[0103] R6: the central curvature radius of the image side surface of the third lens L3;

[0104] R7: the central curvature radius of the object side surface of the fourth lens L4;

[0105] R8: the central curvature radius of the image side surface of the fourth lens L4;

[0106] R9: the central curvature radius of the object side of the optical filter GF; R10: the central curvature radius of the image side of the optical filter GF; d: the axial thickness of the lens, the axial distance between the lenses;

[0107] d0: the axial distance from the aperture S1 to the object side of the first lens L1;

[0108] d1: axial thickness of the first lens L1;

[0109] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0110] d3: axial thickness of the second lens L2;

[0111] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0112] d5: axial thickness of the third lens L3;

[0113] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0114] d7: axial thickness of the fourth lens L4;

[0115] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the optical filter GF;

[0116] d9: axial thickness of the optical filter GF;

[0117] d10: the axial distance from the image side of the optical filter GF to the image surface Si;

[0118] nd: refractive index of d-line (d-line is green light with a wavelength of 555nm);

[0119] nd1: refractive index of the first lens L1 at the d-line;

[0120] nd2: refractive index of the d-line of the second lens L2;

[0121] nd3: refractive index of the third lens L3 at the d-line;

[0122] nd4: refractive index of the d-line of the fourth lens L4;

[0123] ndg: refractive index of the d-line of the optical filter GF;

[0124] vd: Abbe number;

[0125] v1: Abbe number of the first lens L1;

[0126] v2: Abbe number of the second lens L2;

[0127] v3: Abbe number of the third lens L3;

[0128] v4: Abbe number of the fourth lens L4;

[0129] vg: Abbe number of the optical filter GF.

[0130] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0131]

Table 2

[0132]

[0133] For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the following formula (1). However, the present invention is not limited to the aspheric surface polynomial form represented by the formula (1).

[0134] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A

[0135] 16r 16 +A18r 18 +A20r 20 (1)

[0136] Where, k is the cone coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the vertical distance between the point on the aspheric curve and the optical axis, and z is the aspheric depth (the vertical distance between the point on the aspheric surface that is r away from the optical axis and the tangent plane tangent to the vertex on the aspheric optical axis).

[0137] Figure 2 , Figure 3 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 655 nm after passing through the imaging optical lens 10 of the first embodiment are shown respectively. Figure 4 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 555 nm after passing through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0138] Table 13 that follows shows the values ​​corresponding to the parameters specified in the conditional expressions and various numerical values ​​in each embodiment.

[0139] As shown in Table 13, the first embodiment satisfies each conditional expression.

[0140] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 1.057 mm, the full field of view image height IH is 2.502 mm, the field of view angle FOV in the diagonal direction is 86.55°, and the camera optical lens 10 has a large aperture and good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical properties.

[0141] (Second Embodiment)

[0142] The second embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment. Only the differences are listed below.

[0143] Figure 5 The second embodiment of the present invention is shown as an imaging optical lens 20. The second lens L2 has negative refractive power, and the object side surface of the second lens L2 is concave at the paraxial position.

[0144] Table 3 shows design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0145]

Table 3

[0146]

[0147]

[0148] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0149]

Table 4

[0150]

[0151] Figure 6 , Figure 7 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 655 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0152] As shown in Table 13, the second embodiment satisfies each conditional expression.

[0153] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 0.992 mm, the full field of view image height IH is 2.502 mm, the field of view angle FOV in the diagonal direction is 89.20°, and the camera optical lens 20 has a large aperture and good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical properties.

[0154] (Third Embodiment)

[0155] The third embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0156] Fig. 9 The third embodiment of the present invention is shown as an imaging optical lens 30. The second lens L2 has negative refractive power, the object side surface of the second lens L2 is concave at the paraxial position, and the image side surface of the second lens L2 is convex at the paraxial position.

[0157] Table 5 shows design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0158]

Table 5

[0159]

[0160] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0161]

Table 6

[0162]

[0163]

[0164] Fig.10 , Fig.11 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 655 nm after passing through the imaging optical lens 30 of the third embodiment are shown respectively. Fig.12 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 30 of the third embodiment. Fig.12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0165] Table 13 below lists the values ​​corresponding to the various conditional expressions in this embodiment according to the above conditional expressions. Obviously, the imaging optical lens 30 of this embodiment satisfies the above conditional expressions.

[0166] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 1.141 mm, the full field of view image height IH is 2.502 mm, and the field of view angle FOV in the diagonal direction is 82.17°. The camera optical lens 30 has a large aperture and good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical properties.

[0167] (Fourth Embodiment)

[0168] The fourth embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0169] Fig.13 FIG. 4 is a fourth embodiment of an imaging optical lens 40 of the present invention. The second lens L2 has negative refractive power.

[0170] Table 7 shows design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0171]

Table 7

[0172]

[0173] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0174]

Table 8

[0175]

[0176] Fig.14 , Fig.15Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 655 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown respectively. Fig.16 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 40 of the fourth embodiment. Fig.16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0177] The following Table 13 lists the numerical values ​​corresponding to the conditional expressions in this embodiment according to the above conditional expressions. Obviously, the imaging optical lens 40 of this embodiment satisfies the above conditional expressions.

[0178] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 1.152 mm, the full field of view image height IH is 2.502 mm, the field of view angle FOV in the diagonal direction is 81.56°, and the camera optical lens 40 has a large aperture and good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical properties.

[0179] (Fifth Embodiment)

[0180] The fifth embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment. Only the differences are listed below.

[0181] Fig.17 The fifth embodiment of the present invention is shown as an imaging optical lens 50. The second lens L2 has negative refractive power, the object side surface of the second lens L2 is concave at the paraxial position, and the image side surface of the second lens L2 is convex at the paraxial position.

[0182] Table 9 shows design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0183]

Table 9

[0184]

[0185] Table 10 shows aspherical surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0186]

Table 10

[0187]

[0188] Fig.18 , Fig.19Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 655 nm after passing through the imaging optical lens 50 of the fifth embodiment are shown respectively. Fig. 20 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 50 of the fifth embodiment. Fig. 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0189] The following Table 13 lists the numerical values ​​corresponding to the conditional expressions in this embodiment according to the above conditional expressions. Obviously, the imaging optical lens 50 of this embodiment satisfies the above conditional expressions.

[0190] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 0.937 mm, the full field of view image height IH is 2.502 mm, the field of view angle FOV in the diagonal direction is 93.55°, and the camera optical lens 50 has a large aperture and good optical performance, its on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical properties.

[0191] (Comparative Implementation)

[0192] The comparative embodiment is substantially the same as the first embodiment, and the meanings of the symbols are the same as those of the first embodiment, and only the differences are listed below.

[0193] Fig.21 The figure shows a comparative embodiment of an imaging optical lens 60. The second lens L2 has negative refractive power.

[0194] Table 11 shows design data of the imaging optical lens 60 according to the comparative embodiment of the present invention.

[0195]

Table 11

[0196]

[0197] Table 12 shows the aspherical surface data of each lens in the imaging optical lens 60 according to the comparative embodiment of the present invention.

[0198]

Table 12

[0199]

[0200]

[0201] Fig. 22 , Fig.23 Schematic diagrams of axial aberration and magnification chromatic aberration of light with wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 655 nm after passing through the camera optical lens 60 of the comparative embodiment are respectively shown. Fig.24 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the camera optical lens 60 of the comparative embodiment. Fig.24 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0202] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 60 is 1.152 mm, the full field of view image height IH is 2.502 mm, and the field of view angle FOV in the diagonal direction is 83.29°.

[0203] Table 13 below lists the values ​​corresponding to the conditional expressions in the comparative embodiment according to the above conditional expressions. Obviously, the imaging optical lens 60 of the comparative embodiment does not satisfy the above conditional expression 0.97≤TTL / f≤1.20, and cannot achieve miniaturization and maintain good optical performance.

[0204]

Table 13

[0205]

[0206] Those skilled in the art will appreciate that the above-mentioned embodiments are specific embodiments for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A camera optical lens, characterized in that: The camera optical lens comprises, in order from the object side to the image side: a first lens having positive refractive power, a second lens having refractive power, a third lens having positive refractive power, and a fourth lens having negative refractive power; Among them, the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, the focal length of the first lens is f1, the axial thickness of the second lens is d3, the axial thickness of the third lens is d5, the axial distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, and the following relationship is satisfied: 0.15≤d6 / TTL≤0.25; 0.80≤f1 / f≤0.95; 0.97≤TTL / f≤1.20; 4.00≤(R5+R6) / (R5-R6)≤60.00; 0.30≤d3 / d5≤1.

20.

2. The imaging optical lens according to claim 1, characterized in that: The focal length of the fourth lens is f4 and satisfies the following relationship: -1.40≤f4 / f≤-0.

90.

3. The imaging optical lens according to claim 1, characterized in that: The central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side of the fourth lens is R8, and the following relationship is satisfied: 1.50≤R7 / R8≤5.

00.

4. The imaging optical lens according to claim 1, wherein: The object side surface of the first lens is convex at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; The axial thickness of the first lens is d1, the central curvature radius of the object side of the first lens is R1, the central curvature radius of the image side of the first lens is R2, and the following relationship is satisfied: -5.64≤(R1+R2) / (R1-R2)≤-1.37; 0.06≤d1 / TTL≤0.

20.

5. The imaging optical lens according to claim 1, wherein: The focal length of the second lens is f2, the central curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, and the following relationship is satisfied: -48.20≤f2 / f≤143.29; -10.18≤(R3+R4) / (R3-R4)≤1.99; 0.02≤d3 / TTL≤0.

15.

6. The imaging optical lens according to claim 1, characterized in that: The object side surface of the third lens is concave at the paraxial position, and the image side surface of the third lens is convex at the paraxial position; The focal length of the third lens is f3, and satisfies the following relationship: 1.13≤f3 / f≤13.05; 0.03≤d5 / TTL≤0.

19.

7. The imaging optical lens according to claim 1, characterized in that: The object side surface of the fourth lens is convex at the paraxial position, and the image side surface of the fourth lens is concave at the paraxial position; The central curvature radius of the object side of the fourth lens is R7, the central curvature radius of the image side of the fourth lens is R8, the axial thickness of the fourth lens is d7, and the following relationship is satisfied: 0.75≤(R7+R8) / (R7-R8)≤6.43; 0.04≤d7 / TTL≤0.

22.

8. The imaging optical lens according to claim 1, wherein: The camera optical lens aperture value FNO is less than or equal to 2.

45.

9. The imaging optical lens according to claim 1, characterized in that: The image height of the camera optical lens is IH, and satisfies the following relationship: TTL / IH≤1.

16.

10. The imaging optical lens according to claim 1, characterized in that: The combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.42≤f12 / f≤1.58.

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