Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens comprising five lenses which are sequentially a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power from an object side to an image side, the axial distance between the image side surface of the third lens and the object side surface of the fourth lens is d6, the axial thickness of the fourth lens is d7, the axial distance between the image side surface of the fourth lens and the object side surface of the fifth lens is d8, the axial thickness of the fifth lens is d9, and the axial distance between the image side surface of the third lens and the object side surface of the fifth lens is d7. Abbe numbers of the first lens, the second lens and the third lens are v1, v2 and v3 respectively, center curvature radiuses of an object side surface and an image side surface of the fifth lens at a paraxial position are R9 and R10, and the following relational expressions are satisfied: (d6 + d7) / (d8 + d9) is greater than or equal to 6.00 and less than or equal to 9.00; 0.20 < = (v1-v2) / v3 < = 2.30; -0.60 < = (R9 + R10) / (R9-R10) < =-0.05.

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, PC lenses, and vehicle-mounted 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 shrinking pixel size of photosensitive devices and the trend towards lightweight, portable electronic products with high functionality, miniaturized camera optical lenses with excellent imaging quality have become the mainstream in the market. To achieve optimal imaging quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasing user demands, as the pixel size of photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, five-element lens structures are gradually emerging in lens designs. There is an urgent need for long-focus camera lenses with excellent optical characteristics, large apertures, long focal lengths, ultra-thin designs, and fully aberration-compensated lenses. Summary of the Invention

[0003] In view of the above problems, the object of the present invention is to provide a camera optical lens that has good optical performance while meeting the design requirements of fully corrected aberrations, large aperture, long focal length, and ultra-thinness.

[0004] To achieve the above-mentioned object, the technical solution of the present invention provides an imaging optical lens, wherein the imaging optical lens comprises a total of five lenses, wherein the five lenses are, in order from the object side to the image side: a first lens having positive refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, and a fifth lens having negative refractive power;

[0005] Wherein, the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the on-axis thickness of the fourth lens is d7, the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, the on-axis thickness of the fifth lens is d9, the Abbe number of the first lens is v1, the Abbe number of the second lens is v2, the Abbe number of the third lens is v3, the central curvature radius of the object side surface of the fifth lens at the paraxial position is R9, the central curvature radius of the image side surface of the fifth lens at the paraxial position is R10, and the following relationship is satisfied:

[0006] 6.00≤(d6+d7) / (d8+d9)≤9.00;

[0007] 0.20≤(v1-v2) / v3≤2.30;

[0008] -0.60≤(R9+R10) / (R9-R10)≤-0.05.

[0009] Preferably, the focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the camera optical lens is f, satisfying the following relationship:

[0010] 1.20≤(f2-f3) / f≤1.91.

[0011] Preferably, the focal length of the camera optical lens is f, and the image height of the camera optical lens in a field of view of 1.0 is IH, which satisfies the following relationship:

[0012] 6.00≤f / IH≤7.00.

[0013] 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;

[0014] The focal length of the first lens is f1, the focal length of the camera optical lens is f, the central curvature radius of the object side of the first lens at the paraxial position is R1, the central curvature radius of the image side of the first lens at the paraxial position is R2, the axial thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0015] 0.76≤f1 / f≤0.94;

[0016] -3.68≤(R1+R2) / (R1-R2)≤-3.08;

[0017] 0.08≤d1 / TTL≤0.11.

[0018] Preferably, the object side surface of the second lens is convex at the paraxial position, and the image side surface of the second lens is concave at the paraxial position;

[0019] The focal length of the second lens is f2, the focal length of the camera optical lens is f, the central curvature radius of the object side of the second lens at the paraxial position is R3, the central curvature radius of the image side of the second lens at the paraxial position is R4, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0020] 0.70≤f2 / f≤1.16;

[0021] -3.03≤(R3+R4) / (R3-R4)≤-2.22;

[0022] 0.05≤d3 / TTL≤0.08.

[0023] Preferably, the object side surface of the third lens is convex at the paraxial position, and the image side surface of the third lens is concave at the paraxial position;

[0024] The focal length of the third lens is f3, the focal length of the camera optical lens is f, the central curvature radius of the object side of the third lens at the paraxial position is R5, the central curvature radius of the image side of the third lens at the paraxial position is R6, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0025] -0.76≤f3 / f≤-0.47;

[0026] 1.00≤(R5+R6) / (R5-R6)≤1.25;

[0027] 0.01≤d5 / TTL≤0.03.

[0028] 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 convex at the paraxial position;

[0029] The focal length of the fourth lens is f4, the focal length of the camera optical lens is f, the central curvature radius of the object side of the fourth lens at the paraxial position is R7, the central curvature radius of the image side of the fourth lens at the paraxial position is R8, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0030] 0.41≤f4 / f≤0.54;

[0031] 0.66≤(R7+R8) / (R7-R8)≤0.94;

[0032] 0.03≤d7 / TTL≤0.05.

[0033] Preferably, the object side surface of the fifth lens is concave at the paraxial position; the image side surface of the fifth lens is concave at the paraxial position;

[0034] The focal length of the fifth lens is f5, the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

[0035] -0.44≤f5 / f≤-0.35;

[0036] 0.02≤d9 / TTL≤0.04.

[0037] Preferably, the total optical length of the camera optical lens is TTL, the image height of the camera optical lens in a field of view of 1.0 is IH, and the following relationship is satisfied: 5.10≤TTL / IH≤5.75.

[0038] Preferably, the aperture value of the camera optical lens is FNO, and satisfies: 2.80≤FNO≤2.97.

[0039] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical properties, and has the characteristics of fully corrected aberrations, large aperture, long focus, and ultra-thinness. It is particularly suitable for mobile phone camera lens assemblies and WEB camera lenses and vehicle-mounted lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0041] Figure 1 1 is a schematic structural diagram of a camera optical lens according to a first embodiment of the present invention;

[0042] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0043] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0044] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0045] Figure 5 2 is a schematic structural diagram of a second embodiment of an imaging optical lens according to the present invention;

[0046] Figure 6 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0047] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0048] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0049] Figure 9 2 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0050] Figure 10yes Figure 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0051] Figure 11 yes Figure 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0052] Figure 12 yes Figure 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0053] Figure 13 1 is a schematic structural diagram of a camera optical lens according to a comparative embodiment of the present invention;

[0054] Figure 14 yes Figure 13 Schematic diagram of axial aberration of the camera optical lens shown;

[0055] Figure 15 yes Figure 13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0056] Figure 16 yes Figure 13 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0057] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present invention. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the present invention can still be implemented.

[0058] Reference Attachment Figures 1-12 The technical solution of the present invention provides a camera optical lens 10, 20, 30. Figure 1 、 5 Figures 9 and 9 illustrate imaging optical lenses 10, 20, and 30 according to the present invention. These lenses comprise a total of five lenses. Specifically, from the object side to the image side, the imaging optical lenses comprise: a first lens L1, an aperture S1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. An optical element such as an optical filter GF may be positioned between the fifth lens L5 and the image plane Si.

[0059] The first lens L, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all made of plastic. Each lens may also be made of other materials.

[0060] The on-axis distance between the image side surface of the third lens L3 and the object side surface of the fourth lens L4 is defined as d6, the on-axis thickness of the fourth lens L4 is defined as d7, the on-axis distance between the image side surface of the fourth lens L4 and the object side surface of the fifth lens L5 is defined as d8, and the on-axis thickness of the fifth lens L5 is defined as d9, satisfying the following relationship: 6.00≤(d6+d7) / (d8+d9)≤9.00. By properly allocating the air space between the lens elements, within the range of the conditional expression, the degree of deviation of light passing through the lens elements can be mitigated, and chromatic aberration can be effectively corrected, so that the chromatic aberration |LC| is ≤4.0μm.

[0061] The Abbe number of the first lens L1 is defined as v1, the Abbe number of the second lens L2 is defined as v2, and the Abbe number of the third lens L3 is defined as v3, satisfying the following relationship: 0.20≤(v1-v2) / v3≤2.30. Within this conditional range, material properties can be effectively distributed, aberrations can be effectively improved, and imaging quality can be enhanced.

[0062] When the above-mentioned conditional expressions are met, the camera optical lenses 10, 20, and 30 have good optical performance while being able to meet the design requirements of large aperture, long focus, and ultra-thinness. According to the characteristics of the camera optical lenses 10, 20, and 30, the camera optical lenses 10, 20, and 30 are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0063] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0064] The focal length of the second lens L2 is defined as f2, the focal length of the third lens L3 is defined as f3, and the focal length of the camera optical lens is defined as f, satisfying the following relationship: 1.20≤(f2-f3) / f≤1.91. Within the range of the conditional expression, by reasonably allocating the optical focal length of the distribution system, the system has better imaging quality and lower sensitivity.

[0065] The focal length of the camera optical lens is defined as f, and the image height of the camera optical lens in a field of view of 1.0 is defined as IH, which satisfies the following relationship: 6.00≤f / IH≤7.00, which specifies the ratio of the system focal length to the image height. Within the range of the conditional expression, the system has a longer focal length when the image height is fixed, which helps to improve the system magnification.

[0066] The object-side surface of the first lens L1 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The first lens L1 has positive refractive power. The object-side surface and the image-side surface of the first lens L1 can also be set to other concave and convex distributions.

[0067] The focal length f of the imaging optical lens and the focal length f1 of the first lens L1 satisfy the following relationship: 0.76 ≤ f1 / f ≤ 0.94, which specifies the ratio of the positive refractive power of the first lens L1 to the overall focal length. Within this specified range, the first lens L1 possesses an appropriate positive refractive power, which helps minimize system aberrations and facilitates the development of ultra-thin and long-focus lenses.

[0068] The central curvature radius of the object side surface of the first lens L1 at the paraxial position is R1, and the central curvature radius of the image side surface of the first lens L1 at the paraxial position is R2, satisfying the following relationship: -3.68≤(R1+R2) / (R1-R2)≤-3.08. The shape of the first lens L1 is reasonably controlled so that the first lens L1 can effectively correct system spherical aberration.

[0069] The axial thickness of the first lens L1 is d1, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.08≤d1 / TTL≤0.11. Within the range of the conditional expression, miniaturization is achieved.

[0070] The object-side surface of the second lens L2 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The second lens L2 has positive refractive power. The object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0071] The focal length of the second lens L2 is f2, which satisfies the following relationship: 0.70≤f2 / f≤1.16. By controlling the positive refractive power of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system.

[0072] The central curvature radius of the object side surface of the second lens L2 at the paraxial position is R3, and the central curvature radius of the image side surface of the second lens L2 at the paraxial position is R4, which satisfy the following relationship: -3.03≤(R3+R4) / (R3-R4)≤-2.22, which specifies the shape of the second lens L2. When within the range, with the development of ultra-thinness, it is beneficial to correct problems such as axial chromatic aberration.

[0073] The axial thickness of the second lens L2 is d3, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.05≤d3 / TTL≤0.08. Within the range of the conditional expression, miniaturization is achieved.

[0074] The object-side surface of the third lens L3 is convex at the paraxial direction, and the image-side surface is concave at the paraxial direction. The third lens L3 has negative refractive power. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions.

[0075] The focal length of the camera optical lens is f, and the focal length of the third lens L3 is f3, which satisfies the following relationship: -0.76≤f3 / f≤-0.47. Through the reasonable distribution of optical focal length, the system has better imaging quality and lower sensitivity.

[0076] The central curvature radius of the object side surface of the third lens L3 at the paraxial position is R5, and the central curvature radius of the image side surface of the third lens L3 at the paraxial position is R6, which satisfy the following relationship: 1.00≤(R5+R6) / (R5-R6)≤1.25, which specifies the shape of the third lens L3. When within the range, with the development of ultra-thinness, it is beneficial to correct problems such as axial chromatic aberration.

[0077] The axial thickness of the third lens L3 is d5, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.01≤d5 / TTL≤0.03. Within the range of the conditional expression, miniaturization is achieved.

[0078] The object-side surface of the fourth lens element L4 is convex at the paraxial direction, and the image-side surface is convex at the paraxial direction. The fourth lens element L4 has positive refractive power. The object-side surface and image-side surface of the fourth lens element L4 can also be configured with other concave and convex distributions.

[0079] The focal length of the camera optical lens is f, and the focal length of the fourth lens L4 is f4, which satisfies the following relationship: 0.41≤f4 / f≤0.54. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity.

[0080] The object-side surface of the fourth lens L4 at the paraxial position has a central curvature radius of R7, and the image-side surface of the fourth lens L4 at the paraxial position has a central curvature radius of R8, satisfying the following relationship: 0.66≤(R7+R8) / (R7-R8)≤0.94. This conditional relationship specifies the shape of the fourth lens L4. Within the range of this conditional relationship, as ultra-thin technology continues to advance, it is beneficial to correct aberrations at off-axis angles and other issues.

[0081] The axial thickness of the fourth lens L4 is d7, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.03≤d7 / TTL≤0.05. Within the range of the conditional expression, miniaturization is achieved.

[0082] The object-side surface of the fifth lens element L5 is concave at the paraxial direction, and the image-side surface is concave at the paraxial direction. The fifth lens element L5 has negative refractive power. The object-side surface and image-side surface of the fifth lens element L5 can also be configured with other concave or convex distributions.

[0083] The focal length of the camera optical lens is f, and the focal length of the fifth lens L5 is f5, which satisfies the following relationship: -0.44≤f5 / f≤-0.35. By limiting the fifth lens L5, the light angle of the camera optical lens can be effectively smoothed, reducing tolerance sensitivity.

[0084] The axial thickness of the fifth lens L5 is d9, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.02≤d9 / TTL≤0.04. Within the range of the conditional expression, miniaturization is achieved.

[0085] The total optical length of the camera optical lens is TTL, the image height of the camera optical lens in a field of view of 1.0 is IH, and the following relationship is satisfied: 5.10≤TTL / IH≤5.75. Within the conditional range, it is conducive to achieving ultra-thinness.

[0086] The aperture value FNO of the camera optical lens satisfies 2.80≤FNO≤2.97, thereby achieving a large aperture and good imaging performance of the camera optical lens.

[0087] The following examples illustrate the imaging optical lens of the present invention. The symbols used in each example are as follows: The focal length, on-axis distance, center curvature radius, and on-axis thickness are in units of mm.

[0088] TTL: total optical length (the on-axis distance from the object side of the first lens L1 to the image surface Si), in mm;

[0089] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0090] Next, the technical solution of the present invention is specifically described with three embodiments and one comparative embodiment.

[0091] (First embodiment)

[0092] Tables 1 and 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0093]

Table 1

[0094]

[0095] The meanings of the symbols are 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 at the paraxial point;

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

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

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

[0102] R5: the central radius of curvature of the object side of the third lens element L3 at the paraxial point;

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

[0104] R7: the central radius of curvature of the object side of the fourth lens element L4 at the paraxial point;

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

[0106] R9: the central radius of curvature of the object side of the fifth lens element L5 at the paraxial point;

[0107] R10: the central curvature radius of the image side surface of the fifth lens L5 at the paraxial point;

[0108] R11: The central curvature radius of the object side of the optical filter GF at the paraxial position;

[0109] R12: The central curvature radius of the image side of the optical filter GF at the paraxial position;

[0110] d: the on-axis thickness of the lens and the on-axis distance between lenses;

[0111] d0: the on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0112] d1: axial thickness of the first lens L1;

[0113] d2: the on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

[0114] d3: axial thickness of the second lens L2;

[0115] d4: the on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0116] d5: axial thickness of the third lens L3;

[0117] d6: the on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

[0118] d7: axial thickness of the fourth lens L4;

[0119] d8: the on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

[0120] d9: axial thickness of the fifth lens L5;

[0121] d10: the on-axis distance between the image-side surface of the fifth lens L5 and the object-side surface of the optical filter GF;

[0122] d11: axial thickness of the optical filter GF;

[0123] d12: the axial distance from the image side of the optical filter GF to the image plane Si;

[0124] nd: refractive index of d-line (d-line is green light with a wavelength of 550nm);

[0125] nd1: the refractive index of the first lens L1 at the d-line;

[0126] nd2: the refractive index of the second lens L2 at the d-line;

[0127] nd3: the refractive index of the third lens L3 at the d-line;

[0128] nd4: the refractive index of the fourth lens L4 at the d-line;

[0129] nd5: the refractive index of the fifth lens L5 at the d-line;

[0130] ndg: refractive index of the d-line of the optical filter GF;

[0131] vd: Abbe number;

[0132] v1: Abbe number of the first lens L1;

[0133] v2: Abbe number of the second lens L2;

[0134] v3: Abbe number of the third lens L3;

[0135] v4: Abbe number of the fourth lens L4;

[0136] v5: Abbe number of the fifth lens L5;

[0137] vg: Abbe number of the optical filter GF.

[0138] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0139]

Table 2

[0140]

[0141] For convenience, the aspheric surface of each lens surface is represented by 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).

[0142] 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 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0143] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and the tangent plane tangent to the vertex on the aspheric axis).

[0144] Figure 2 、 Figure 3 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 10 of the first embodiment are shown respectively. Figure 4 FIG1 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.

[0145] In this embodiment, the imaging optical lens 10 has an entrance pupil diameter (ENPD) of 7.751 mm, a full field of view (1.0° field of view) image height (IH) of 3.584 mm, and a diagonal field of view (FOV) of 17.48°. The imaging optical lens 10 meets the design requirements of a large aperture, a long focal length, and an ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it exhibits excellent optical characteristics.

[0146] It can be understood that the 1.0 field of view image height refers to half the diagonal length of the sensor's effective pixel area; the 1.0 field of view diagonal direction FOV refers to the field of view angle corresponding to the sensor's effective pixel area.

[0147] (Second embodiment)

[0148] The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0149] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0150] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0151]

Table 3

[0152]

[0153] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0154]

Table 4

[0155]

[0156]

[0157] Figure 6 、 Figure 7 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 FIG. 4 shows a schematic diagram of 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.

[0158] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 7.239 mm, the full field of view (1.0 field of view) image height IH is 3.582 mm, and the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 18.76°. The camera optical lens 20 meets the design requirements of large aperture, long focus, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0159] (Third embodiment)

[0160] The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0161] Figure 9 FIG. 1 shows an imaging optical lens 30 according to a third embodiment of the present invention.

[0162] Tables 5 and 6 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0163]

Table 5

[0164]

[0165]

[0166] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0167]

Table 6

[0168]

[0169]

[0170] Figure 10 、 Figure 11 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 30 of the third embodiment are shown respectively. Figure 12 FIG. 3 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 30 of the third embodiment. Figure 12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0171] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 8.396 mm, the full field of view (1.0 field of view) image height IH is 3.584 mm, and the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 16.04°. The camera optical lens 30 meets the design requirements of large aperture, long focus, and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0172] (Comparative embodiment)

[0173] The meanings of the symbols in the comparative embodiment are the same as those in the first embodiment.

[0174] Figure 13 Shown is a camera optical lens 40 according to a comparative embodiment of the present invention.

[0175] Tables 7 and 8 show the design data of the imaging optical lens 40 according to the comparative embodiment of the present invention.

[0176]

Table 7

[0177]

[0178]

[0179] Table 8 shows the aspherical surface data of each lens in the imaging optical lens 40 according to the comparative embodiment of the present invention.

[0180]

Table 8

[0181]

[0182]

[0183] Figure 14 、 Figure 15 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the camera optical lens 40 of the comparative embodiment are shown respectively. Figure 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 camera optical lens 40 of the comparative embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0184] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 7.548 mm, the full field of view (1.0 field of view) image height IH is 3.584 mm, and the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 18.22°. As shown in Table 9, the camera optical lens 40 does not meet 6.00≤(d6+d7) / (d8+d9)≤9.00. The camera optical lens 40 does not meet the design requirements of large aperture, long focus, and ultra-thinness. Its on-axis and off-axis chromatic aberrations are not fully corrected, and it does not have excellent optical characteristics.

[0185]

Table 9

[0186]

[0187] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made 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 a total of five lenses, and the five lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; Wherein, the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the on-axis thickness of the fourth lens is d7, the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, the on-axis thickness of the fifth lens is d9, the Abbe number of the first lens is v1, the Abbe number of the second lens is v2, the Abbe number of the third lens is v3, the central curvature radius of the object side surface of the fifth lens at the paraxial position is R9, the central curvature radius of the image side surface of the fifth lens at the paraxial position is R10, and the following relationship is satisfied: 6.00≤(d6+d7) / (d8+d9)≤9.00; 0.20≤(v1-v2) / v3≤2.30; -0.60≤(R9+R10) / (R9-R10)≤-0.

05.

2. The imaging optical lens according to claim 1, wherein: The focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the camera optical lens is f, which satisfies the following relationship: 1.20≤(f2-f3) / f≤1.

91.

3. The imaging optical lens according to claim 1, wherein: The focal length of the camera optical lens is f, and the image height of the camera optical lens in a field of view of 1.0 is IH, which satisfies the following relationship: 6.00≤f / IH≤7.

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 focal length of the first lens is f1, the focal length of the camera optical lens is f, the central curvature radius of the object side of the first lens at the paraxial position is R1, the central curvature radius of the image side of the first lens at the paraxial position is R2, the axial thickness of the first lens is d1, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.76≤f1 / f≤0.94; -3.68≤(R1+R2) / (R1-R2)≤-3.08; 0.08≤d1 / TTL≤0.

11.

5. The imaging optical lens according to claim 1, wherein: The object side surface of the second lens is convex at the paraxial position, and the image side surface of the second lens is concave at the paraxial position; The focal length of the second lens is f2, the focal length of the camera optical lens is f, the central curvature radius of the object side of the second lens at the paraxial position is R3, the central curvature radius of the image side of the second lens at the paraxial position is R4, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.70≤f2 / f≤1.16; -3.03≤(R3+R4) / (R3-R4)≤-2.22; 0.05≤d3 / TTL≤0.

08.

6. The imaging optical lens according to claim 1, wherein: The object side surface of the third lens is convex at the paraxial position, and the image side surface of the third lens is concave at the paraxial position; The focal length of the third lens is f3, the focal length of the camera optical lens is f, the central curvature radius of the object side of the third lens at the paraxial position is R5, the central curvature radius of the image side of the third lens at the paraxial position is R6, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -0.76≤f3 / f≤-0.47; 1.00≤(R5+R6) / (R5-R6)≤1.25; 0.01≤d5 / TTL≤0.

03.

7. The imaging optical lens according to claim 1, wherein: The object-side surface of the fourth lens is convex at the paraxial position, and the image-side surface of the fourth lens is convex at the paraxial position; The focal length of the fourth lens is f4, the focal length of the camera optical lens is f, the central curvature radius of the object side of the fourth lens at the paraxial position is R7, the central curvature radius of the image side of the fourth lens at the paraxial position is R8, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.41≤f4 / f≤0.54; 0.66≤(R7+R8) / (R7-R8)≤0.94; 0.03≤d7 / TTL≤0.

05.

8. The imaging optical lens according to claim 1, wherein: The object side surface of the fifth lens is concave at the paraxial position; the image side surface of the fifth lens is concave at the paraxial position; The focal length of the fifth lens is f5, the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -0.44≤f5 / f≤-0.35; 0.02≤d9 / TTL≤0.

04.

9. The imaging optical lens according to claim 1, wherein: The total optical length of the camera optical lens is TTL, the image height of the camera optical lens in a field of view of 1.0 is IH, and the following relationship is satisfied: 5.10≤TTL / IH≤5.

75.

10. The imaging optical lens according to claim 1, wherein: The aperture value of the camera optical lens is FNO, and satisfies: 2.80≤FNO≤2.97.

Images