Wide-angle optical lens, camera module and electronic equipment

Abstract

The utility model discloses a wide-angle optical lens, a camera module and electronic equipment, and the wide-angle optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from the object side to the image side, and the first lens and the fourth lens have negative focal power. The second lens, the third lens, the fifth lens and the sixth lens have positive focal power, object side surfaces and image side surfaces of the first lens to the sixth lens are rotationally symmetrical aspheric surfaces, D11 / D62 is greater than or equal to 0.75 and less than or equal to 1.1, D11 is the effective aperture of the object side surface of the first lens, and D62 is the effective aperture of the image side surface of the sixth lens. By adopting the technical scheme provided by the invention, the object side surface of the first lens can have a relatively large effective aperture, so that the field angle of the wide-angle optical lens can be increased.

Description

Technical Field

[0001] This disclosure relates to the field of lens technology, and in particular to a wide-angle optical lens, camera module and electronic device. Background Technology

[0002] With the development of technology, users have increasingly higher requirements for the photography performance of mobile phones and other electronic devices. Among these, 6P lenses have been widely used in electronic devices. A 6P lens is a lens composed of six lenses. However, the field of view of 6P lenses in related technologies is often relatively limited. Utility Model Content

[0003] This disclosure provides a wide-angle optical lens, a camera module, and an electronic device, which can solve the aforementioned technical problems existing in related technologies. The technical solution is as follows:

[0004] In one aspect, a wide-angle optical lens is provided, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side;

[0005] The first lens and the fourth lens have negative optical power, and the second lens, the third lens, the fifth lens and the sixth lens have positive optical power. The object-side surface and the image-side surface of the first lens to the sixth lens are both aspherical.

[0006] 0.75≤D11 / D62≤1.1, where D11 is the effective aperture of the object side of the first lens and D62 is the effective aperture of the image side of the sixth lens.

[0007] In one possible implementation, 0.5 ≤ D12 / D61 ≤ 1.0, where D12 is the effective aperture of the image side of the first lens and D61 is the effective aperture of the object side of the sixth lens.

[0008] In one possible implementation, 0.4 ≤ IH / TTL ≤ 0.65, where IH is the effective image height of the wide-angle optical lens and TTL is the total optical length of the wide-angle optical lens.

[0009] In one possible implementation, 0.2 ≤ IH / (TTL*F) ≤ 0.325, where F is the aperture of the wide-angle optical lens.

[0010] In one possible implementation, 1.9 ≤ F ≤ 2.4, where F is the aperture of the wide-angle optical lens.

[0011] In one possible implementation, 3 ≤ f4 / f1 ≤ 6, where f1 is the focal length of the first lens and f4 is the focal length of the fourth lens.

[0012] In one possible implementation, 0 ≤ (R11-R12) / (R11+R12) ≤ 5, R11 < 0, where R11 is the radius of curvature of the object side of the first lens, and R12 is the radius of curvature of the image side of the first lens.

[0013] In one possible implementation, -1≤(R21-R22) / (R21+R22)≤0, where R21 is the radius of curvature of the object side of the second lens and R22 is the radius of curvature of the image side of the second lens.

[0014] In one possible implementation, the wide-angle optical lens includes an aperture stop;

[0015] The aperture stop is located between the second lens and the third lens, or the aperture stop is located between the third lens and the fourth lens.

[0016] In a second aspect, a camera module is provided, including the wide-angle optical lens described in the first aspect.

[0017] Thirdly, an electronic device is provided, including the camera module described in the second aspect.

[0018] The beneficial effects of the technical solution provided in this disclosure include at least the following:

[0019] By ensuring that 0.75≤D11 / D62≤1.1, the object-side surface of the first lens can have a larger effective aperture, thereby increasing the field of view of the wide-angle optical lens.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a wide-angle optical lens provided in an embodiment of this disclosure;

[0023] Figure 2 This is a schematic diagram of the half field of view and field curvature of a wide-angle optical lens provided in an embodiment of this disclosure;

[0024] Figure 3This is a schematic diagram of the half field of view and distortion of a wide-angle optical lens provided in an embodiment of this disclosure;

[0025] Figure 4 This is a schematic diagram of the transverse chromatic aberration of a wide-angle optical lens provided in an embodiment of this disclosure;

[0026] Figure 5 This is a schematic diagram of axial chromatic aberration of a wide-angle optical lens provided in an embodiment of this disclosure;

[0027] Figure 6 This is a schematic diagram of the half field of view and field curvature of a wide-angle optical lens provided in an embodiment of this disclosure;

[0028] Figure 7 This is a schematic diagram of the half field of view and distortion of a wide-angle optical lens provided in an embodiment of this disclosure;

[0029] Figure 8 This is a schematic diagram of the transverse chromatic aberration of a wide-angle optical lens provided in an embodiment of this disclosure;

[0030] Figure 9 This is a schematic diagram of axial chromatic aberration of a wide-angle optical lens provided in an embodiment of this disclosure.

[0031] Figure label:

[0032] 1. First lens; 11. Object-side surface of the first lens; 12. Image-side surface of the first lens;

[0033] 2. Second lens; 21. Object-side surface of the second lens; 22. Image-side surface of the second lens;

[0034] 3. The third lens; 31. The object-side surface of the third lens; 32. The image-side surface of the third lens;

[0035] 4. The fourth lens; 41. The object-side surface of the fourth lens; 42. The image-side surface of the fourth lens;

[0036] 5. The fifth lens; 51. The object-side surface of the fifth lens; 52. The image-side surface of the fifth lens;

[0037] 6. The sixth lens; 61. The object-side surface of the sixth lens; 62. The image-side surface of the sixth lens;

[0038] 7. Aperture; 8. Filter; 9. Imaging plane. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] To facilitate understanding, the technical terms used in this disclosure will be explained and described below.

[0042] Effective aperture refers to the maximum diameter of light rays that a lens is designed to pass through. Lens parameters can include the effective aperture on the object side and the effective aperture on the image side.

[0043] The field of view (FOV) in optical instruments is the angle between the two edges of the lens, representing the maximum range through which the image of the target object can pass through the lens. The size of the FOV determines the field of view of the optical instrument; a larger FOV results in a wider field of view.

[0044] Focal length, also known as focal length, is a parameter in an optical system that measures the degree of convergence or divergence of light. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane when a scene at infinity is formed into a clear image on the focal plane.

[0045] Effective Focal Length (EFL) is the distance from the center of the lens to the focal point.

[0046] Optical power is the difference between the convergence of the image-side beam and the convergence of the object-side beam.

[0047] Positive focal length means that the lens has a positive focal length and has a converging effect on light.

[0048] Negative optical power means that the lens has a negative focal length, which has a diverging effect on light.

[0049] Aperture is a device used to control the amount of light passing through the lens and entering the camera's sensor. It is usually located inside the lens. The size of the aperture is typically expressed using an F-number. The F-number is the ratio of the lens's focal length to its aperture diameter. A smaller F-number means a larger aperture, allowing more light to enter the camera in the same amount of time; a larger F-number means a smaller aperture, resulting in a shallower depth of field, blurring the background and creating an effect similar to a telephoto lens.

[0050] In an optical system, the total track length (TTL) is the distance from the object-side surface of the first lens to the image plane. The object-side is the side containing the subject, and the surface of the lens closest to the object-side is called the object-side surface. The image-side is the side containing the image of the subject, and the surface of the lens closest to the image-side is called the image-side surface.

[0051] Maximum image height is typically represented by the diagonal length of the effective imaging area of ​​an image sensor.

[0052] Effective image height (IH) is half of the maximum image height, which is half the total diagonal length of the effective imaging area of ​​the image sensor.

[0053] Distortion, also known as distortion, is the degree of distortion in the image formed by an optical system relative to the object itself. Distortion occurs due to the spherical aberration of the aperture; the height of the intersection point between the principal ray from different fields of view and the Gaussian image plane is not equal to the ideal image height, and this difference is the distortion. Therefore, distortion only changes the imaging position of an off-axis object point on the ideal plane, causing distortion in the image shape, but it does not affect the image's sharpness.

[0054] The radius of curvature indicates whether the optical surface is convex towards the object side or the image side. When the optical surface (including the object side or the image side) is convex towards the object side, the radius of curvature of the optical surface is positive; when the optical surface is convex towards the image side, it is equivalent to the optical surface being concave towards the object side, and the radius of curvature of the optical surface is negative.

[0055] The Abbe number, also known as the dispersion coefficient, is the ratio of the difference in refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0056] Chromatic aberration is a serious defect in lens imaging. Because different colors of light have different refractive indices, aberrations occur when these colors of light pass through a lens; this aberration is chromatic aberration. Visible light has a wavelength range of approximately 400 to 700 nanometers. Different wavelengths of light have different colors, and their refractive indices also differ when passing through a lens. Therefore, a point in object space may form a color spot in image space.

[0057] Axial chromatic aberration, also known as longitudinal chromatic aberration, positional chromatic aberration, or axial aberration, occurs when a beam of light parallel to the optical axis converges at different positions after passing through a lens. This aberration is called positional chromatic aberration or axial chromatic aberration. This is because the lens images different wavelengths of light at different positions, causing the focal planes of the images of different colors of light to not coincide, resulting in the dispersion of polychromatic light.

[0058] Lateral chromatic aberration, also known as magnification chromatic aberration or transverse chromatic aberration, refers to the difference in magnification of different colors of light by an optical system. Wavelength causes a change in the magnification of the optical system, and consequently, the size of the image changes.

[0059] Field curvature, also known as image field bending, refers to the phenomenon where, after a planar object passes through a lens system, the image plane formed by focusing all the planar object points does not coincide with the ideal image plane, but rather forms a curved surface. Although each object point can form a sharp point through the lens...

[0060] In related technologies, the effective aperture of the first lens on the object side of a 6P wide-angle lens in the direction from the object side to the image side is often much smaller than the effective aperture of the sixth lens on the image side, which leads to a limited field of view of the 6P wide-angle lens.

[0061] To address the aforementioned problems, this disclosure provides a wide-angle optical lens, please refer to... Figure 1 The wide-angle optical lens comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, and a sixth lens 6 arranged sequentially from the object side to the image side. The first lens 1 and the fourth lens 4 have negative optical power, while the second lens 2, the third lens 3, the fifth lens 5, and the sixth lens 6 have positive optical power. The object side and image side of the first lens 1 to the sixth lens 6 are both aspherical. Wherein, 0.75 ≤ D11 / D62 ≤ 1.1, D11 is the effective aperture of the object side 11 of the first lens 1, and D62 is the effective aperture of the image side 62 of the sixth lens 6.

[0062] By employing the wide-angle optical lens provided in this disclosure, with 0.75≤D11 / D62≤1.1, the object-side surface 11 of the first lens 1 can have a larger effective aperture, thereby increasing the field of view of the wide-angle optical lens. Furthermore, it can also increase the light transmission of the first lens 1, thereby improving the overall light transmission of the wide-angle optical lens and ultimately enhancing image quality.

[0063] In this design, the object-side and image-side surfaces of all lenses are rotationally symmetric aspherical surfaces. This design helps reduce the complexity and manufacturing cost of the lens, while improving optical performance, reducing distortion, and enhancing image quality.

[0064] Optionally, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens 6 are all made of resin material.

[0065] Optionally, the radius of curvature of the object side 11 of the first lens 1 is negative, and the radius of curvature of the image side 12 of the first lens 1 is positive. The first lens 1 is a large-aperture negative lens, and its main function is to meet the large field of view requirement of ultra-wide angle.

[0066] Optionally, the radius of curvature of the object side 21 of the second lens 2 is positive, and the radius of curvature of the image side 22 of the second lens 2 is positive.

[0067] Optionally, the object-side surface 31 of the third lens 3 has a positive radius of curvature, and the image-side surface 32 of the third lens 3 has a negative radius of curvature; the object-side surface 41 of the fourth lens 4 has a negative radius of curvature, and the image-side surface 12 of the first lens 1 has a negative radius of curvature. The third lens 3 and the fourth lens 4 are primarily used to correct chromatic aberration.

[0068] Optionally, the object-side surface 51 of the fifth lens 5 has a negative radius of curvature, and the image-side surface 12 of the first lens 1 has a negative radius of curvature; the object-side surface 61 of the sixth lens 6 has a positive radius of curvature on the optical axis, and the image-side surface 62 of the sixth lens 6 has a positive radius of curvature on the optical axis. The fifth lens 5 and the sixth lens 6 are primarily used to correct field curvature and distortion: the fifth lens 5 can introduce negative aberrations (including negative distortion) to cancel out the positive distortions of the first lens 1 and the sixth lens 6, further correcting distortion and thus reducing the distortion of the ultra-wide-angle optical lens.

[0069] Optionally, the first lens is a large-aperture negative lens, whose main function is to meet the requirements of a wide field of view for ultra-wide angles.

[0070] Optionally, the field of view (FOV) of the wide-angle optical lens is in the range of 110°≤FOV≤130°.

[0071] The wide-angle optical lens provided in the embodiments of this disclosure will be further described below with reference to some examples.

[0072] In some embodiments, 0.5≤D12 / D61≤1.0, where D12 is the effective aperture of the image-side surface 12 of the first lens 1 and D61 is the effective aperture of the object-side surface 61 of the sixth lens 6.

[0073] In some embodiments, 0.4 ≤ IH / TTL ≤ 0.65, where IH is the effective image height of the wide-angle optical lens and TTL is the total optical length of the wide-angle optical lens.

[0074] The shorter the TTL (Total Laser Tunneling) or the larger the IH (Input Height), the more difficult it is to manufacture a wide-angle lens. By limiting the ratio of effective image height to total optical length to between 0.4 and 0.65, the manufacturing difficulty of wide-angle lenses can be effectively reduced. Furthermore, while reducing the total optical length (TTL) of the wide-angle lens, it is possible to ensure that the number of pixels in the image formed on the imaging plane 9 is not relatively reduced or not significantly reduced, thus maintaining the image quality of the wide-angle lens.

[0075] In some embodiments, 1.9 ≤ F ≤ 2.4, where F is the aperture of the wide-angle optical lens.

[0076] Where F represents the aperture of a wide-angle lens, which is the ratio of the lens's focal length to its light-gathering diameter. A smaller F-number means a larger aperture, allowing more light to enter the lens within the same unit of time; a larger F-number means a smaller aperture, resulting in a shallower depth of field and blurred background content, similar to the effect of a telephoto lens. The above formula specifies the range of the focal length-to-light-gathering diameter ratio for wide-angle lenses in video recording as 1.9 ≤ F ≤ 2.4, which facilitates proportional scaling when the lens architecture is the same.

[0077] In some embodiments, 0.2 ≤ IH / (TTL*F) ≤ 0.325.

[0078] Among them, IH, TTL, and F are mutually constrained, so that 0.2≤IH / (TTL*F)≤0.325, which can simultaneously satisfy the requirements of large aperture, short optical length and large effective image height, thereby improving the imaging quality of wide-angle optical lenses.

[0079] In some embodiments, 3≤f4 / f1≤6.

[0080] Where f1 is the focal length of the first lens 1 and f4 is the focal length of the fourth lens 4. A reasonable distribution of focal lengths allows for compatibility between their respective optical powers, resulting in low sensitivity and good image quality in the optical imaging lens, while also improving distortion.

[0081] In some embodiments, 0≤(R11-R12) / (R11+R12)≤5, R11<0.

[0082] Where R11 is the radius of curvature of the object-side surface 11 of the first lens 1, and R12 is the radius of curvature of the image-side surface 12 of the first lens 1. Since R11 < 0, and 0 ≤ (R11 - R12) / (R11 + R12) ≤ 5, the object-side surface 11 of the first lens 1 is concave towards the object side, and the image-side surface 12 of the first lens 1 is convex or concave towards the object side. Furthermore, setting (R11 - R12) / (R11 + R12) within this range ensures the light transmission effect of the first lens 1.

[0083] In some embodiments, -1≤(R21-R22) / (R21+R22)≤0, where R21 is the radius of curvature of the object side surface 21 of the second lens 2, and R22 is the radius of curvature of the image side surface 22 of the second lens 2.

[0084] In some embodiments, the wide-angle optical lens includes an aperture stop 7 located between the second lens 2 and the third lens 3, or the aperture stop 7 located between the third lens 3 and the fourth lens 4.

[0085] The lens located on the object side of aperture 7 mainly serves to allow object-side light to pass through to achieve imaging, while the lens located on the image side of aperture 7 mainly serves to correct aberrations. Aperture 7 allows for adjustment of the beam and field of view, enabling the wide-angle optical lens to be adjusted according to different user needs.

[0086] When the aperture stop 7 is positioned between the third lens 3 and the fourth lens 4, the object side 31 of the third lens 3 and the image side 42 of the fourth lens 4 are nearly symmetrical, the image side 32 of the third lens 3 and the object side 41 of the fourth lens 4 are nearly symmetrical, the object side 21 of the second lens 2 and the image side 52 of the fifth lens 5 are nearly symmetrical, the image side 22 of the second lens 2 and the object side 51 of the fifth lens 5 are nearly symmetrical, the object side 11 of the first lens 1 and the image side 62 of the sixth lens 6 are nearly symmetrical, and the image side 12 of the first lens 1 and the object side 61 of the sixth lens 6 are nearly symmetrical. This effectively eliminates spherical aberration and distortion of the wide-angle optical lens and improves the imaging quality of the wide-angle optical lens.

[0087] In some embodiments, the wide-angle optical lens includes a filter 8 located between the imaging plane 9 and the image-side plane 62 of the sixth lens 6.

[0088] By setting filter 8, the chromatic aberration of the wide-angle optical lens can be effectively reduced, thereby improving the imaging quality of the wide-angle optical lens.

[0089] In the wide-angle optical lens disclosed in this embodiment, the first lens 1 to the sixth lens 6 have a total of 12 aspherical surfaces, including both the object-side and image-side surfaces, whose surface shapes are defined by the following formula:

[0090]

[0091] Where z represents the depth of the aspherical surface, r represents the distance of a point on the aspherical surface from the optical axis; k represents the conic constant, r n Represents the normalized curvature, u represents r / r n a m Q represents the m-th order aspherical coefficient. m Let m represent the m-th order polynomial.

[0092] The structural features of wide-angle optical lenses will be described below with two examples:

[0093] Example 1

[0094] In Example 1, the effective image height IH of the wide-angle optical lens is 3.265mm, the effective focal length EFL is 1.8948mm, the aperture is F2.0, and the total optical length TTL is 5.68mm. At this time, the value of IH / (TTL*F) is 0.287, the field of view FOV of the wide-angle optical lens is 120°, and the aperture stop 7 is located between the second lens 2 and the third lens 3.

[0095] Table 1 below shows the optical characteristics of each element of the lens, including the radius of curvature, the thickness of the element or the distance between the elements, the refractive index, the Abbe number (dispersion coefficient), and the focal length.

[0096] Table 1

[0097]

[0098] Table 2 below shows the aspherical surface coefficients of the 12 surfaces contained in the first lens 1 to the sixth lens 6. The first lens 1 to the sixth lens 6 have a total of 6 object-side surfaces and 6 image-side surfaces, all of which are aspherical surfaces.

[0099] Table 2

[0100]

[0101] Table 2 (continued)

[0102]

[0103] Figure 2 The diagram shows the half-field-curvature of the wide-angle optical lens, where the horizontal axis represents the field area in millimeters (mm) and the vertical axis represents the half-field-of-view in degrees (°). As can be seen from the diagram, the field curvature fluctuates with increasing field of view, but remains within ±0.1 mm.

[0104] Figure 3 The diagram illustrates the half-field-of-view (FOV) and distortion of this wide-angle optical lens, where the horizontal axis represents distortion and the vertical axis represents the half-field-of-view of the subject. As can be seen from the diagram, distortion fluctuates with increasing FOV, but when the half-field-of-view is between 50° and 60° (100° ≤ FOV ≤ 120°), the distortion rate is within ±2%. This demonstrates that this wide-angle optical lens can achieve distortion within ±2% at an ultra-wide angle of 100° ≤ FOV ≤ 120°.

[0105] Figure 4 The diagram illustrates the maximum image height versus chromatic aberration of this wide-angle optical lens. The horizontal axis represents chromatic aberration in micrometers (μm), and the vertical axis represents the maximum image height in millimeters (mm). The four curves, from left to right, represent the chromatic aberration changes for yellow, purple, green, and blue, from the point where the maximum image height is 0 until the curves intersect. The diagram shows that the chromatic aberration fluctuates with increasing maximum image height, but remains within ±2 μm.

[0106] Figure 5This diagram illustrates the normalized pupil coordinates-axial chromatic aberration of the wide-angle optical lens. The horizontal axis represents axial chromatic aberration in millimeters (mm), and the vertical axis represents the normalized pupil coordinates. From left to right, the diagram shows the axial chromatic aberration variations for purple, yellow, black, green, and blue, starting from the point where the normalized pupil coordinates are 0 and ending at the intersection of the curves. As can be seen from the diagram, the axial chromatic aberration fluctuates with increasing maximum image height, but remains within ±0.03 mm.

[0107] Example 2

[0108] In Example 2, the effective image height IH of the wide-angle optical lens is 2.9mm, the effective focal length EFL is 1.52mm, the aperture number is F2.0, and the total optical length TTL is 5.223mm. At this time, the value of IH / (TTL*F) is 0.277, the field of view FOV of the wide-angle optical lens is 126°, and the aperture stop 7 is located between the second lens 2 and the third lens 3.

[0109] Table 3 below shows the optical characteristics of each element of the lens, including the radius of curvature, the thickness of the element or the distance between the elements, the refractive index, the Abbe number (dispersion coefficient), and the focal length.

[0110] Table 3

[0111]

[0112] Table 4 below shows the aspherical surface coefficients of the 12 surfaces contained in the first lens 1 to the sixth lens 6. The first lens 1 to the sixth lens 6 have a total of 6 object-side surfaces and 6 image-side surfaces, all of which are aspherical surfaces.

[0113] Table 4

[0114]

[0115] Table 4 (continued)

[0116]

[0117] Figure 6 The diagram shows the half-field-curvature of the wide-angle optical lens, where the horizontal axis represents the field area in millimeters (mm) and the vertical axis represents the half-field-of-view in degrees (°). As can be seen from the diagram, the field curvature fluctuates with increasing field of view, but remains within ±0.1 mm.

[0118] Figure 7The diagram illustrates the half-field-of-view (FOV) and distortion of this wide-angle optical lens, where the horizontal axis represents distortion and the vertical axis represents the half-field-of-view of the subject. As can be seen from the diagram, distortion fluctuates with increasing FOV, but when the half-field-of-view is between 50° and 62.9° (i.e., 100° ≤ FOV ≤ 125.8°), the distortion rate is within ±2%. This demonstrates that this wide-angle optical lens can achieve distortion within ±2% at an ultra-wide angle of 100° ≤ FOV ≤ 125.8°.

[0119] Figure 8 The diagram illustrates the maximum image height versus axial chromatic aberration of this wide-angle optical lens. The horizontal axis represents axial chromatic aberration in micrometers (μm), and the vertical axis represents the maximum image height in millimeters (mm). The four curves, from left to right, represent the axial chromatic aberration changes for yellow, purple, green, and blue colors, from the point where the maximum image height is 0 until the curves intersect. The diagram shows that as the maximum image height increases, the axial chromatic aberration of various colors fluctuates, but it remains within ±2 μm.

[0120] Figure 9 This diagram illustrates the normalized pupil coordinates-axial chromatic aberration of the wide-angle optical lens. The horizontal axis represents axial chromatic aberration in millimeters (mm), and the vertical axis represents the normalized pupil coordinates. From left to right, the diagram shows the axial chromatic aberration variations for purple, yellow, black, green, and blue, starting from the point where the normalized pupil coordinates are 0 and ending at the intersection of the curves. As can be seen from the diagram, the axial chromatic aberration fluctuates with increasing maximum image height, but remains within ±0.03 mm.

[0121] in conclusion

[0122] As can be seen from the two examples above, using the wide-angle optical lens provided in this disclosure, it is possible to achieve small distortion within ±2% under ultra-wide-angle shooting conditions of 110°-125.8°.

[0123] Based on the same concept, this disclosure also provides a camera module including the wide-angle optical lens mentioned above.

[0124] Optionally, the camera module includes an optical sensor for converting the image on the imaging surface 9 into an electrical signal and sending it to an electronic device.

[0125] Based on the same concept, this disclosure also provides an electronic device, which includes the camera module mentioned above.

[0126] The electronic devices involved in this disclosure may also be referred to as terminals, mobile terminals, terminal devices, user equipment (UE), etc. For example, a terminal device may be a smartphone, tablet computer, etc. It should be understood that this disclosure does not specifically limit the specific technologies or device forms employed by the terminal device.

[0127] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0128] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0129] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0130] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0131] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.

[0132] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A wide-angle optical lens, characterized in that, It includes a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth lens (5), and a sixth lens (6) arranged sequentially from the object side to the image side; The first lens (1) and the fourth lens (4) have negative optical power, the second lens (2), the third lens (3), the fifth lens (5) and the sixth lens (6) have positive optical power, and the object side and image side of the first lens (1) to the sixth lens (6) are aspherical. 0.75≤D11 / D62≤1.1, where D11 is the effective aperture of the object side (11) of the first lens (1) and D62 is the effective aperture of the image side (62) of the sixth lens (6).

2. The wide-angle optical lens according to claim 1, characterized in that, 0.5≤D12 / D61≤1.0, where D12 is the effective aperture of the image side (12) of the first lens (1) and D61 is the effective aperture of the object side (61) of the sixth lens (6).

3. The wide-angle optical lens according to claim 1, characterized in that, 0.4≤IH / TTL≤0.65, where IH is the effective image height of the wide-angle optical lens and TTL is the total optical length of the wide-angle optical lens.

4. The wide-angle optical lens according to claim 3, characterized in that, 0.2≤IH / (TTL*F)≤0.325, where F is the aperture of the wide-angle optical lens.

5. The wide-angle optical lens according to claim 1, characterized in that, 1.9≤F≤2.4, where F is the aperture of the wide-angle optical lens.

6. The wide-angle optical lens according to claim 1, characterized in that, 3≤f4 / f1≤6, where f1 is the focal length of the first lens (1) and f4 is the focal length of the fourth lens (4).

7. The wide-angle optical lens according to claim 1, characterized in that, 0≤(R11-R12) / (R11+R12)≤5, R11<0, where R11 is the radius of curvature of the object side (11) of the first lens (1), and R12 is the radius of curvature of the image side (12) of the first lens (1).

8. The wide-angle optical lens according to claim 1, characterized in that, -1≤(R21-R22) / (R21+R22)≤0, where R21 is the radius of curvature of the object side (21) of the second lens (2) and R22 is the radius of curvature of the image side (22) of the second lens (2).

9. The wide-angle optical lens according to claim 1, characterized in that, The wide-angle optical lens includes an aperture stop (7); The aperture stop (7) is located between the second lens (2) and the third lens (3), or the aperture stop (7) is located between the third lens (3) and the fourth lens (4).

10. A camera module, characterized in that, Includes the wide-angle optical lens as described in any one of claims 1-9.

11. An electronic device, characterized in that, Includes the camera module as described in claim 10.

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