Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which comprises five lenses in sequence, i.e. a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power; wherein the curvature radius of the object side of the fifth lens is R9, the curvature radius of the image side of the fifth lens is R10, the curvature radius of the object side of the third lens is R5, the curvature radius of the image side of the third lens is R6, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the air interval of the fourth lens and the fifth lens is T45, the on-axis thickness of the third lens is d5, the on-axis thickness of the fourth lens is d7, the on-axis distance from the image side of the third lens to the object side of the fourth lens is d6, and the following relationships are satisfied: 2.40 <= R9 / R10 <= 3.60; 0.50 <= (R5+R6) / (R5-R6) <= 0.90; 15.00 <= (f4-f5) / T45 <= 25.00; and 3.00 <= (d5+d7) / d6 <= 5.00.

Description

TECHNICAL FIELD

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

[0002] In recent years, with the rise of various smart devices, the demand for small camera optical lenses is increasing, and due to the reduction of pixel size of photosensitive devices, plus the current trend of electronic products being light and thin, a small camera optical lens with good imaging quality has become the mainstream in the market. In order to obtain better imaging quality, a multi-piece lens structure is often used. With the development of technology and the increasing of user's diversified needs, under the condition of continuous reduction of pixel area of photosensitive devices and continuous improvement of system imaging quality, five-piece lens structure gradually appears in lens design. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, small size and fully corrected aberrations. SUMMARY

[0003] In view of the above problems, the main purpose of the present application is to provide a camera optical lens which has good optical performance and meets the design requirements of large aperture, ultra-thin and wide-angle.

[0004] To achieve the above purpose, the technical scheme of the present application provides a camera optical lens, which comprises five lenses in sequence from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; wherein the curvature radius of the object side of the fifth lens is R9, the curvature radius of the image side of the fifth lens is R10, the curvature radius of the object side of the third lens is R5, the curvature radius of the image side of the third lens is R6, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the air gap between the fourth lens and the fifth lens is T45, the on-axis thickness of the third lens is d5, the on-axis thickness of the fourth lens is d7, and the on-axis distance from the image side of the third lens to the object side of the fourth lens is d6, and the following relationships are satisfied: 2.40≤R9 / R10≤3.60; 0.50≤(R5+R6) / (R5-R6)≤0.90; 15.00≤(f4-f5) / T45≤25.00; 3.00≤(d5+d7) / d6≤5.00.

[0005] Preferably, the curvature radius of the object side of the fourth lens is R7, the curvature radius of the image side of the fourth lens is R8, and the following relationship is satisfied: 3.60≤R7 / R8≤9.00.

[0006] Preferably, the focal length of the first lens is f1, the focal length of the second lens is f2, and the following relationship is satisfied: -0.45≤f1 / f2≤-0.25.

[0007] Preferably, the object side surface of the first lens is convex at the paraxial region, the image side surface of the first lens is concave at the paraxial region; the focal length of the first lens is f1, the focal length of the imaging optical lens is f, the radius of curvature of the object side surface of the first lens is R1, the radius of curvature of the image side surface of the first lens is R2, the on-axis thickness of the first lens is d1, the total track length of the imaging optical lens is TTL, and the following relationships are satisfied: 0.86≤f1 / f≤1.07; -1.78≤(R1+R2) / (R1-R2)≤-1.60; 0.14≤d1 / TTL≤0.16.

[0008] Preferably, the object side surface of the second lens is convex at the paraxial region, the image side surface of the second lens is concave at the paraxial region; the focal length of the second lens is f2, the focal length of the imaging optical lens is f, the radius of curvature of the object side surface of the second lens is R3, the radius of curvature of the image side surface of the second lens is R4, the on-axis thickness of the second lens is d3, the total track length of the imaging optical lens is TTL, and the following relationships are satisfied: -4.25≤f2 / f≤-1.91; 2.65≤(R3+R4) / (R3-R4)≤5.16; 0.04≤d3 / TTL≤0.06.

[0009] Preferably, the object side surface of the third lens is convex at the paraxial region, the image side surface of the third lens is convex at the paraxial region; the focal length of the third lens is f3, the focal length of the imaging optical lens is f, the total track length of the imaging optical lens is TTL, and the following relationships are satisfied: 4.35≤f3 / f≤6.82; 0.10≤d5 / TTL≤0.13.

[0010] Preferably, the object side surface of the fourth lens is concave at the paraxial region, the image side surface of the fourth lens is convex at the paraxial region; the focal length of the imaging optical lens is f, the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the image side surface of the fourth lens is R8, the total track length of the imaging optical lens is TTL, and the following relationships are satisfied: 1.30≤f4 / f≤1.51; 1.25≤(R7+R8) / (R7-R8)≤1.76; 0.14≤d7 / TTL≤0.18.

[0011] Preferably, the object-side surface of the fifth lens is convex near the axis, and the image-side surface of the fifth lens is concave near the axis; the focal length of the camera optical lens is f, the on-axis thickness of the fifth lens is d9, and the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: -0.93≤f5 / f≤-0.82; 1.76≤(R9+R10) / (R9-R10)≤2.41; 0.08≤d9 / TTL≤0.10.

[0012] Preferably, the aperture number of the camera optical lens is FNO, and satisfies the following relationship: FNO≤1.88.

[0013] Preferably, the field of view of the camera optical lens is FOV, and satisfies the following relationship: 76.87°≤FOV.

[0014] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical characteristics, and has the characteristics of large aperture, wide angle and ultra-thinness, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. 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 effort, wherein:

[0016] Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0017] Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown;

[0018] Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0019] Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0020] Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0021] Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown;

[0022] Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0023] Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0024] Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0025] Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown;

[0026] Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0027] Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown;

[0028] Figure 13 This is a schematic diagram of the structure of the camera optical lens in the comparative embodiment;

[0029] Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown;

[0030] Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens;

[0031] Figure 16 yes Figure 13 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of the invention. However, the technical solutions claimed in this invention can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0033] Referring to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10, 20, 30. Figure 1 , 5Figures 1 and 9 show the imaging optical lenses 10, 20, and 30 of the present invention, which together comprise five lenses. Specifically, the imaging optical lenses, from the object side to the image side, are as follows: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5. An optical filter GF or other optical element may be disposed between the fifth lens L5 and the image plane S1.

[0034] The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all made of plastic. Other materials may also be used for the lenses.

[0035] The radius of curvature of the object side of the fifth lens L5 is defined as R9, and the radius of curvature of the image side of the fifth lens L5 is defined as R10, where 2.40≤R9 / R10≤3.60. This defines the shape of the fifth lens L5, which is beneficial for correcting astigmatism and distortion of the camera lens, making the distortion|Distortion|≤3%, and reducing the possibility of vignetting.

[0036] The radius of curvature of the object side of the third lens L3 is defined as R5, and the radius of curvature of the image side of the third lens L3 is defined as R6, wherein: 0.50≤(R5+R6) / (R5-R6)≤0.90. This defines the shape of the third lens L3. Within the conditional range, this is beneficial to mitigate the degree of light deflection after passing through the lens and can effectively reduce aberrations.

[0037] The focal length of the fourth lens L4 is defined as f4, the focal length of the fifth lens L5 is defined as f5, and the air gap between the fourth lens L4 and the fifth lens L5 is defined as T45, where: 15.00≤(f4-f5) / T45≤25.00. When the above conditions are met, it helps the rear lens maintain a sufficiently strong negative refractive force to correct the off-axis aberration at the image side, and at the same time can effectively shorten the total optical length to achieve miniaturization, thereby expanding the application range of the product.

[0038] The on-axis thickness of the third lens L3 is defined as d5, the on-axis thickness of the fourth lens L4 is defined as d7, and the on-axis distance from the image side of the third lens L3 to the object side of the fourth lens L4 is defined as d6. 3.00≤(d5+d7) / d6≤5.00 specifies the ratio of air gaps, which helps to compress the total length of the optical system within the conditional range.

[0039] The radius of curvature of the object side of the fourth lens L4 is defined as R7, and the radius of curvature of the image side of the fourth lens L4 is defined as R8. 3.60≤R7 / R8≤9.00 defines the shape of the fourth lens L4. When within the specified range, it helps to mitigate the degree of light deflection after passing through the lens and can effectively reduce aberrations.

[0040] The focal length of the first lens L1 is defined as f1, and the focal length of the second lens L2 is defined as f2. -0.45≤f1 / f2≤-0.25 specifies the ratio of the focal lengths of the first lens L1 and the second lens L2. By reasonably allocating the optical focal length of the system, the system can have better imaging quality and lower sensitivity.

[0041] Under the above conditions, the camera optical lenses 10, 20, and 30 have good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thin design. Based on the characteristics of the camera optical lenses 10, 20, and 30, they are particularly suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS, and other camera elements.

[0042] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0043] The object-side surface of the first lens L1 is convex near the axis, and the image-side surface is concave near the axis. The first lens L1 has positive refractive power. The object-side surface and image-side surface of the first lens L1 can also be configured with other concave and convex distributions.

[0044] The focal length of the camera optical lens 10 is f, and the focal length of the first lens L1 is f1, satisfying the following relationship: 0.86≤f1 / f≤1.07, which specifies the ratio of the positive refractive power of the first lens L1 to the overall focal length. Within the specified range, the first lens has appropriate positive refractive power, which is beneficial for reducing system aberrations and also facilitates the development of ultra-thin and wide-angle lenses.

[0045] The center radius of curvature of the object side of the first lens L1 is R1, and the center radius of curvature of the image side of the first lens L1 is R2, satisfying the following relationship: -1.78≤(R1+R2) / (R1-R2)≤-1.60. By reasonably controlling the shape of the first lens L1, the first lens L1 can effectively correct the spherical aberration of the system.

[0046] The on-axis thickness of the first lens L1 is d1, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: 0.14≤d1 / TTL≤0.16. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0047] The object-side surface of the second lens L2 is convex near the axis, and the image-side surface is concave near the axis. The second lens L2 has negative refractive power. The object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0048] The focal length of the camera optical lens 10 is f, and the focal length of the second lens L2 is f2, satisfying the following relationship: -4.25≤f2 / f≤-1.91. By controlling the negative optical power of the second lens L2 within a reasonable range, it is beneficial to correct the aberrations of the optical system.

[0049] The center radius of curvature of the object side of the second lens L2 is R3, and the center radius of curvature of the image side of the second lens L2 is R4, satisfying the following relationship: 2.65≤(R3+R4) / (R3-R4)≤5.16, which defines the shape of the second lens L2. When within this range, as lenses develop towards ultra-thin and wide-angle lenses, it is beneficial to correct on-axis chromatic aberration problems.

[0050] The on-axis thickness of the second lens L2 is d3, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: 0.04≤d3 / TTL≤0.06. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0051] The object-side surface of the third lens L3 is convex near the axis, and the image-side surface is also convex near the axis. The third lens L3 has positive refractive power. The object-side surface and image-side surface of the third lens L3 can also be configured with other concave and convex distributions.

[0052] The focal length of the camera optical lens 10 is f, and the focal length of the third lens L3 is f3, satisfying the following relationship: 4.35≤f3 / f≤6.82. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0053] The on-axis thickness of the third lens L3 is d5, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: 0.10≤d5 / TTL≤0.13. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0054] The object-side surface of the fourth lens L4 is concave near the axis, while the image-side surface is convex near the axis. The fourth lens L4 has positive refractive power. The object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave and convex distributions.

[0055] The focal length of the camera optical lens 10 is f, and the focal length of the fourth lens L4 is f4, satisfying the following relationship: 1.30≤f4 / f≤1.51. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0056] The central radius of curvature of the object side of the fourth lens L4 is R7, and the central radius of curvature of the image side of the fourth lens L4 is R8, and they satisfy the following relationship: 1.25≤(R7+R8) / (R7-R8)≤1.76, which defines the shape of the fourth lens L4. When within this range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0057] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: 0.14≤d7 / TTL≤0.18. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0058] The object-side surface of the fifth lens L5 is convex near the axis, while the image-side surface is concave near the axis. The fifth lens L5 has negative refractive power. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave and convex distributions.

[0059] The focal length of the camera optical lens 10 is f, and the focal length of the fifth lens L5 is f5, satisfying the following relationship: -0.93≤f5 / f≤-0.82. The limitation of the fifth lens L5 can effectively make the light angle of the camera optical lens 10 smooth and reduce tolerance sensitivity.

[0060] The central radius of curvature of the object side of the fifth lens L5 is R9, and the central radius of curvature of the image side of the fifth lens L5 is R10, and the following relationship is satisfied: 1.76≤(R9+R10) / (R9-R10)≤2.41, which defines the shape of the fifth lens L5. When within the range, with the development of ultra-thin wide-angle lenses, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0061] The on-axis thickness of the fifth lens L5 is d9, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: 0.08≤d9 / TTL≤0.10. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0062] The camera optical lens 10 has an aperture value (FNO) less than or equal to 1.88, thus achieving a large aperture and good imaging performance. The field of view (FOV) of the camera optical lens 10 at 1.0 field of view is greater than or equal to 76.87°, thus achieving wide-angle imaging.

[0063] The camera optical lens of the present invention will be described below with examples. The symbols described in each example are as follows. The units for focal length, on-axis distance, center radius of curvature, on-axis thickness, inversion point position, and stagnation point position are mm.

[0064] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm;

[0065] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0066] Image height IH of 1.0 field of view: The field of view height corresponding to the effective pixel of the sensor (i.e., half the diagonal length of the effective pixel area of ​​the sensor);

[0067] 1.0 Field of View (FOV): The field of view angle corresponding to the effective pixel of the sensor;

[0068] Image height IHm of MIC field of view: The field of view height extended beyond 1.0 to prevent assembly deviation;

[0069] FOVm: The field of view angle corresponding to the image height of the MIC field of view;

[0070] Preferably, the object-side and / or image-side surfaces of the lens may also be provided with inflection points and / or stagnation points to meet the requirements of high-quality imaging.

[0071] The technical solution of the present invention will be described in detail below with three embodiments. At the same time, a comparative embodiment is provided for reference. The technical effects of the present invention cannot be achieved when the above-described conditions are not met.

[0072] (First Implementation)

[0073] Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0074] Table 1

[0075]

[0076] The meanings of each symbol are as follows.

[0077] S1: Aperture;

[0078] R: Radius of curvature at the center of the optical surface;

[0079] R1: The central radius of curvature of the object-side surface of the first lens L1;

[0080] R2: The central radius of curvature of the image-side surface of the first lens L1;

[0081] R3: The central radius of curvature of the object-side surface of the second lens L2;

[0082] R4: The central radius of curvature of the image-side surface of the second lens L2;

[0083] R5: The central radius of curvature of the object-side surface of the third lens L3;

[0084] R6: The central radius of curvature of the image-side surface of the third lens L3;

[0085] R7: The central radius of curvature of the object side surface of the fourth lens L4;

[0086] R8: The central radius of curvature of the image-side surface of the fourth lens L4;

[0087] R9: The central radius of curvature of the object-side surface of the fifth lens L5;

[0088] R10: The central radius of curvature of the image-side surface of the fifth lens L5;

[0089] R11: The center radius of curvature of the object side surface of the optical filter GF;

[0090] R12: Radius of curvature of the center of the image side of the optical filter GF;

[0091] d: Axial thickness of the lens, axial distance between lenses;

[0092] d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1;

[0093] d1: On-axis thickness of the first lens L1;

[0094] 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;

[0095] d3: On-axis thickness of the second lens L2;

[0096] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

[0097] d5: On-axis thickness of the third lens L3;

[0098] 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;

[0099] d7: On-axis thickness of the fourth lens L4;

[0100] 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;

[0101] d9: On-axis thickness of the fifth lens L5;

[0102] d10: The on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the optical filter GF;

[0103] d11: On-axis thickness of the optical filter GF;

[0104] D12: The on-axis distance from the image-side surface of the optical filter GF to the image plane Si;

[0105] nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm);

[0106] nd1: The refractive index of the d-line of the first lens L1;

[0107] nd2: The refractive index of the d-line of the second lens L2;

[0108] nd3: The refractive index of the d-line of the third lens L3;

[0109] nd4: The refractive index of the d-line of the fourth lens L4;

[0110] nd5: The refractive index of the d-line of the fifth lens L5;

[0111] ndg: The refractive index of the d-line of the optical filter GF;

[0112] vd: Abbe number;

[0113] vd1: Abbe number of the first lens L1;

[0114] vd2: Abbe number of the second lens L2;

[0115] vd3: Abbe number of the third lens L3;

[0116] vd4: Abbe number of the fourth lens L4;

[0117] vd5: Abbe number of the fifth lens L5;

[0118] vdg: Abbe number of the GF of the optical filter.

[0119] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0120] Table 2

[0121]

[0122]

[0123] For convenience, the aspherical surfaces of each lens surface are as shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0124] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r12 +A14r

[0125] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0126] 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 a tangent plane at the vertex of the aspheric optical axis).

[0127] Figure 2 , Figure 3 A schematic diagrams of axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm, 470nm and 435nm passes through the camera optical lens 10 of the first embodiment. Figure 4 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes 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.

[0128] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 2.587 mm, the image height IH of the 1.0 field of view is 4.096 mm, the field of view FOV of the 1.0 field of view is 78.71°, the image height IHm of the MIC field of view is 4.310 mm, and the field of view FOVm of the MIC field of view is 81.58°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0129] (Second Implementation)

[0130] The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0131] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0132] Tables 3 and 4 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0133] Table 3

[0134]

[0135] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0136] Table 4

[0137]

[0138]

[0139] Figure 6 , Figure 7 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 20 of the second embodiment. Figure 8 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera 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.

[0140] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 2.673 mm, the image height IH of the 1.0 field of view is 4.074 mm, the field of view FOV of the 1.0 field of view is 76.87°, the image height IHm of the MIC field of view is 4.316 mm, and the field of view FOVm of the MIC field of view is 79.73°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0141] (Third Implementation)

[0142] The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0143] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0144] Tables 5 and 6 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0145] Table 5

[0146]

[0147]

[0148] Table 6 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0149] Table 6

[0150]

[0151] Figure 10 , Figure 11 Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 30 of the third embodiment. Figure 12 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes 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.

[0152] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 2.294 mm, the image height IH of the 1.0 field of view is 4.083 mm, the field of view FOV of the 1.0 field of view is 85.53°, the image height IHm of the MIC field of view is 4.309 mm, and the field of view FOVm of the MIC field of view is 88.44°. The camera optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0153] Table 9, which appears later, shows the values ​​corresponding to various numerical values ​​and parameters specified in the conditional expressions in each of the three implementation methods.

[0154] (Comparative Implementation Methods)

[0155] The symbols in the comparative implementation method have the same meanings as those in the first implementation method.

[0156] Figure 13 The image shows a camera lens 40 according to a comparative embodiment.

[0157] Tables 7 and 8 show the design data of the camera optical lens 40 in the comparative embodiment.

[0158] Table 7

[0159]

[0160] Table 8 shows the aspherical data of each lens in the camera optical lens 40 of the comparative embodiment.

[0161] Table 8

[0162]

[0163]

[0164] Figure 14 , Figure 15 The diagrams show axial aberration and magnification chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm after passing through the camera optical lens 40 of the comparative embodiment. Figure 16 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes 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.

[0165] Table 9 below lists the values ​​of each conditional expression in the comparative embodiment according to the above conditional expressions. Obviously, the camera optical lens 40 of the comparative embodiment does not satisfy the above conditional expression 2.40≤R9 / R10≤3.60.

[0166] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 2.631mm, the image height IH of the 1.0 field of view is 4.096mm, the field of view FOV of the 1.0 field of view is 77.57°, the image height IHm of the MIC field of view is 4.310mm, and the field of view FOVm of the MIC field of view is 80.55°. The camera optical lens 40 does not meet the design requirements of large aperture, wide angle, and ultra-thin design.

[0167] Table 9

[0168]

[0169] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can 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 five lenses, which are arranged in the following order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power. The object side of the first lens is convex at the paraxial direction, and the image side of the first lens is concave at the paraxial direction. The object side of the second lens is convex at the paraxial direction, and the image side of the second lens is concave at the paraxial direction. The object side of the third lens is convex at the paraxial direction, and the image side of the third lens is convex at the paraxial direction. The object side of the fourth lens is concave at the paraxial direction, and the image side of the fourth lens is convex at the paraxial direction. The object side of the fifth lens is convex at the paraxial direction, and the image side of the fifth lens is concave at the paraxial direction. Wherein, the radius of curvature of the object-side surface of the fifth lens is R9, the radius of curvature of the image-side surface of the fifth lens is R10, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the air gap between the fourth and fifth lenses is T45, the axial thickness of the third lens is d5, the axial thickness of the fourth lens is d7, and the axial distance from the image-side surface of the third lens to the object-side surface of the fourth lens is d6, and the following relationship is satisfied: 2.40≤R9 / R10≤3.60; 0.50≤(R5+R6) / (R5-R6)≤0.90; 15.00≤(f4-f5) / T45≤25.00; 3.00≤(d5+d7) / d6≤5.

00.

2. The camera optical lens according to claim 1, characterized in that, The radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, and the following relationship is satisfied: 3.60≤R7 / R8≤9.

00.

3. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, and the focal length of the second lens is f2, and they satisfy the following relationship: -0.45≤f1 / f2≤-0.

25.

4. The camera optical lens according to claim 1, characterized in that, The focal length of the first lens is f1, the focal length of the imaging optical lens is f, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.86≤f1 / f≤1.07; -1.78≤(R1+R2) / (R1-R2)≤-1.60; 0.14≤d1 / TTL≤0.

16.

5. The camera optical lens according to claim 1, characterized in that, The second lens has a focal length of f2, the imaging optical lens has a focal length of f, the object-side radius of curvature of the second lens is R3, the image-side radius of curvature of the second lens is R4, the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: -4.25≤f² / f≤-1.91; 2.65≤(R3+R4) / (R3-R4)≤5.16; 0.04≤d3 / TTL≤0.

06.

6. The camera optical lens according to claim 1, characterized in that, The third lens has a focal length of f3, the camera optical lens has a focal length of f, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 4.35≤f³ / f≤6.82; 0.10≤d5 / TTL≤0.

13.

7. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, the radius of curvature of the object side of the fourth lens is R7, the radius of curvature of the image side of the fourth lens is R8, and the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 1.30≤f4 / f≤1.51; 1.25≤(R7+R8) / (R7-R8)≤1.76; 0.14≤d7 / TTL≤0.

18.

8. The camera optical lens according to claim 1, characterized in that, The focal length of the camera optical lens is f, the on-axis thickness of the fifth lens is d9, and the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -0.93≤f5 / f≤-0.82; 1.76≤(R9+R10) / (R9-R10)≤2.41; 0.08≤d9 / TTL≤0.

10.

9. The camera optical lens according to claim 1, characterized in that, The aperture number of the camera optical lens is FNO, and it satisfies the following relationship: FNO≤1.

88.

10. The camera optical lens according to claim 1, characterized in that, The field of view (FOV) of the camera optical lens is given, and satisfies the following relationship: 76.87°≤FOV.

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