Optical lens, camera module and terminal equipment
By rationally configuring seven lenses, the shortcomings of existing optical lenses in terms of high resolution and large aperture are solved, achieving high relative illumination and good image quality, especially effective imaging in nighttime or rainy weather.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-04-07
AI Technical Summary
Existing automotive optical lenses cannot meet the requirements of high resolution, large aperture and high relative illumination, especially in low-light or rainy weather conditions where the image quality is insufficient.
A seven-lens optical lens was designed. By rationally configuring the refractive power and surface shape of the lenses, including setting positive and negative refractive power lenses, and combining them with a specific surface shape design, the lens optimizes light entry and corrects chromatic aberration and aberration, satisfying the relationship 34deg≤FOV≤42deg and 1.5≤FNO≤1.65.
It achieves a balance between high resolution and large aperture, improves relative illumination, and enables the optical lens to have good image quality in low-light environments such as at night or on rainy days.
Smart Images
Figure CN121806245A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical imaging technology, and in particular to an optical lens, a camera module, and a terminal device. Background Technology
[0002] In recent years, optical lenses have been widely used in automotive driver assistance systems, such as in-vehicle reversing camera systems, dashcams, automatic parking and panoramic parking systems, and wayfinding systems. With the rapid development of autonomous driving systems, the performance requirements for optical lenses are also increasing, moving towards higher resolution, wider field of view, and higher contrast with lower noise.
[0003] However, the optical lenses currently used in automobiles cannot meet the requirements for high resolution, cannot adapt to dark environments such as nighttime or rainy days, and cannot simultaneously meet the requirements for large aperture and high relative illumination. Summary of the Invention
[0004] This application discloses an optical lens, a camera module, and a terminal device that can meet the requirements of high resolution while also having a large aperture and high relative illumination.
[0005] To achieve the above objectives, in a first aspect, embodiments of this application disclose an optical lens comprising seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object side to the image side; The first lens has positive refractive power, the object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis. The second lens has negative refractive power, the object side of the second lens is concave near the optical axis, and the image side of the second lens is concave near the optical axis. The third lens has positive refractive power, and the image-side surface of the third lens is convex near the optical axis; The fourth lens has positive refractive power, and the object side of the fourth lens is convex near the optical axis; The fifth lens has negative refractive power, the object side of the fifth lens is convex near the optical axis, and the image side of the fifth lens is concave near the optical axis. The sixth lens has positive refractive power, and the object side of the sixth lens is convex near the optical axis; The seventh lens has negative refractive power, and the object side of the seventh lens is concave near the optical axis; The optical lens satisfies the following relationship: 34deg≤FOV≤42deg、1.5≤FNO≤1.65; Wherein, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.
[0006] In the optical lens provided in this application, to meet the requirements of high resolution while maintaining a large aperture and high relative illumination, the refractive power and surface shape of the seven lenses are rationally configured. Specifically, the first lens is set to have positive refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively, which helps to allow more incident light to enter the optical lens and improve the relative illumination of the optical lens. The second lens is set to have negative refractive power, and its object-side and image-side surfaces are concave near the optical axis, which, in conjunction with the positive refractive power of the first lens, adjusts the light direction and corrects chromatic aberration. The third lens is set to have positive refractive power, and its image-side surface is convex near the optical axis, which helps to guide diverging light into the rear optical lens and balance aberrations. The fourth lens is set to have positive refractive power, and its object-side surface is convex near the optical axis. Located in the middle of the optical lens, it can be used to adjust the light height and control the angle of light incident on the fifth lens. The fifth lens is designed with negative refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. The sixth lens is designed with positive refractive power, and its object-side surface is convex. This design allows light to converge smoothly, helping to eliminate chromatic aberration, correct astigmatism, and improve resolution. The seventh lens is designed with negative refractive power, and its object-side surface is concave. This design allows light to transition smoothly to the image plane, correcting astigmatism and field curvature, and improving the resolving power of the optical lens.
[0007] The optical lens satisfies the relationship 34deg≤FOV≤42deg. By reasonably setting the maximum field of view of the optical lens, the field of view and good image quality can be effectively balanced.
[0008] The optical lens satisfies the relationship 1.5≤FNO≤1.65. By limiting the aperture number of the optical lens, the light transmission capability of the optical lens can be improved, resulting in higher relative illumination. This allows the optical lens to have good image quality even in dark environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution.
[0009] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship: 1.9≤TTL / F≤2.3, and / or, 2.2deg / mm≤FOV / F≤3.4deg / mm, and / or, 1.9≤∑CT / ∑AT≤4; Wherein, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens (i.e., the total length of the optical lens), F is the focal length of the optical lens, ∑CT is the sum of the thicknesses of all lenses from the first lens to the seventh lens on the optical axis, and ∑AT is the sum of the air gaps between two adjacent lenses from the first lens to the seventh lens.
[0010] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship: -4≤F1 / F2≤-1.5, and / or, 1≤F3 / F≤5, and / or, -1.7≤F4 / F5≤-0.8, and / or, -1≤F7 / F≤-0.7; Wherein, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, F7 is the focal length of the seventh lens, and F is the focal length of the optical lens.
[0011] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship: 0.7≤CT5 / CT4≤3, and / or, 0.85≤CT6 / CT5≤2.1, and / or, -13≤F2 / CT2≤-3; Wherein, CT2 is the thickness of the second lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and F2 is the focal length of the second lens.
[0012] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship: 1≤|R5 / R6|≤4, and / or, 1.7≤R9 / R10≤2.6, and / or, 1.4≤F7 / R13≤2.1; Wherein, R5 is the radius of curvature of the object side of the third lens at the optical axis, R6 is the radius of curvature of the image side of the third lens at the optical axis, F7 is the focal length of the seventh lens, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, R10 is the radius of curvature of the image side of the fifth lens at the optical axis, and R13 is the radius of curvature of the object side of the seventh lens at the optical axis.
[0013] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship: 4.5≤SD1 / SAGS1≤8.2, and / or, 1.45≤SAGS10 / SAGS9≤1.95, and / or, -2.3≤SAGS13 / CT7≤-0.3; Wherein, SD1 is the maximum effective half-aperture of the object-side surface of the first lens, SAGS1 is the distance from the intersection of the object-side surface of the first lens and the optical axis to the maximum effective aperture of the object-side surface of the first lens on the optical axis (i.e., the sagitta of the object-side surface of the first lens), SAGS9 is the distance from the intersection of the object-side surface of the fifth lens and the optical axis to the maximum effective aperture of the object-side surface of the fifth lens on the optical axis (i.e., the sagitta of the object-side surface of the fifth lens), SAGS10 is the distance from the intersection of the image-side surface of the fifth lens and the optical axis to the maximum effective aperture of the image-side surface of the fifth lens on the optical axis (i.e., the sagitta of the image-side surface of the fifth lens), SAGS13 is the distance from the intersection of the object-side surface of the seventh lens and the optical axis to the maximum effective aperture of the object-side surface of the seventh lens on the optical axis (i.e., the sagitta of the object-side surface of the seventh lens), and CT7 is the thickness of the seventh lens on the optical axis.
[0014] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship: 1≤SD7 / SD6≤1.25, and / or, 1.2≤CT3 / ET3≤2.3, and / or, 1.6≤CT6 / ET6≤3; Wherein, SD6 is the maximum effective half-aperture of the image side of the third lens, SD7 is the maximum effective half-aperture of the object side of the fourth lens, CT3 is the thickness of the third lens on the optical axis, ET3 is the distance from the maximum effective half-aperture of the object side of the third lens to the maximum effective half-aperture of the image side of the third lens in the direction parallel to the optical axis (i.e., the edge thickness of the third lens), CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance from the maximum effective half-aperture of the object side of the sixth lens to the maximum effective half-aperture of the image side of the sixth lens in the direction parallel to the optical axis (i.e., the edge thickness of the sixth lens).
[0015] As an optional implementation, in an embodiment of the first aspect of this application, the optical lens satisfies the following relationship: 27deg≤FOV*IMGH / SD1≤48deg, and / or, 111deg≤FOV*F / IMGH≤115deg, and / or, 21deg≤FOV / FNO≤26deg; Wherein, IMGH is half the image height corresponding to the maximum field of view of the optical lens, SD1 is the maximum effective half-aperture of the object side of the first lens, and F is the focal length of the optical lens. Secondly, this application also discloses a camera module, which includes an image sensor and an optical lens as described in the first aspect above, wherein the image sensor is disposed on the image side of the optical lens.
[0016] Thirdly, this application also discloses a terminal device, including a housing and a camera module as described in the second aspect above, the camera module being disposed in the housing.
[0017] Compared with the prior art, the beneficial effects of this application are: The optical lens, camera module, and terminal device disclosed in this application, in order to meet the requirements of high resolution while also having a large aperture and high relative illumination, utilizes a reasonable configuration of the refractive power and surface shape of the seven lenses. Specifically, the first lens is designed to have positive refractive power, with its object-side and image-side surfaces being convex and concave near the optical axis, respectively, which facilitates more incident light entering the optical lens and improves its relative illumination. The second lens is designed to have negative refractive power, with its object-side and image-side surfaces being concave near the optical axis, working in conjunction with the positive refractive power of the first lens to adjust the light path and correct chromatic aberration. The third lens is designed to have positive refractive power, with its image-side surface being convex near the optical axis, which helps to guide diverging light into the rear optical lens and balance aberrations. The fourth lens is designed to have positive refractive power, with its object-side surface being convex near the optical axis, and is located in the middle of the optical lens, which can be used to adjust the light height and control the angle of light incident on the fifth lens. The fifth lens is designed with negative refractive power, and its object-side and image-side surfaces are convex and concave near the optical axis, respectively. The sixth lens is designed with positive refractive power, and its object-side surface is convex. This design allows light to converge smoothly, helping to eliminate chromatic aberration, correct astigmatism, and improve resolution. The seventh lens is designed with negative refractive power, and its object-side surface is concave. This design allows light to transition smoothly to the image plane, correcting astigmatism and field curvature, and improving the resolving power of the optical lens.
[0018] The optical lens satisfies the relationship 34deg≤FOV≤42deg. By reasonably setting the maximum field of view of the optical lens, the field of view and good image quality can be effectively balanced.
[0019] The optical lens satisfies the relationship 1.5≤FNO≤1.65. By limiting the aperture number of the optical lens, the light transmission capability of the optical lens can be improved, resulting in higher relative illumination. This allows the optical lens to have good image quality even in dark environments such as at night or on rainy days, meeting the requirements of large aperture and high resolution. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 1 of this application; Figure 2 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 1 of this application. Figure 3 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 2 of this application; Figure 4 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 2 of this application; Figure 5 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 3 of this application; Figure 6 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 3 of this application; Figure 7 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 4 of this application; Figure 8 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 4 of this application. Figure 9 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 5 of this application; Figure 10 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 5 of this application; Figure 11 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 6 of this application; Figure 12 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 6 of this application; Figure 13 This is a schematic diagram of the structure of the optical lens disclosed in Embodiment 7 of this application; Figure 14 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 7 of this application; Figure 15 This is a schematic diagram of the camera module disclosed in this application; Figure 16This is a structural diagram of the terminal device disclosed in this application when it is a vehicle. Detailed Implementation
[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0023] In this application, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.
[0024] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.
[0025] Please see Figure 1 The optical lens 100 disclosed in this application includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged sequentially along the optical axis from the object side to the image side. During imaging, light rays enter the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 sequentially from the object side of the first lens L1, and are finally imaged on the imaging surface 101 of the optical lens 100.
[0026] Among them, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, the sixth lens L6 has positive refractive power, and the seventh lens L7 has negative refractive power.
[0027] Furthermore, the object-side surface 11 of the first lens L1 is convex near the optical axis, and the image-side surface 12 of the first lens L1 is concave near the optical axis. The object-side surface 21 of the second lens L2 is concave near the optical axis, and the image-side surface 22 of the second lens L2 is concave near the optical axis. The object-side surface 31 of the third lens L3 is either convex or concave near the optical axis, and the image-side surface 32 of the third lens L3 is convex near the optical axis. The object-side surface 41 of the fourth lens L4 is convex near the optical axis, and the image-side surface 42 of the fourth lens L4 is either convex or concave near the optical axis. The object-side surface 51 of the fifth lens L5 is convex near the optical axis, and the image-side surface 52 of the fifth lens L5 is concave near the optical axis. The object-side surface 61 of the sixth lens L6 is convex near the optical axis, and the image-side surface 62 of the sixth lens L6 is either convex or concave near the optical axis. The object-side surface 71 of the seventh lens L7 is concave near the optical axis, and the image-side surface 72 of the seventh lens L7 is convex, concave, or flat near the optical axis.
[0028] In the optical lens 100 provided in this application, in order to meet the requirements of high resolution while taking into account large aperture and high relative illumination, the refractive power and surface shape of the seven lenses are reasonably configured. Specifically, the first lens L1 is set to have positive refractive power, and its object side and image side are designed to be convex and concave near the optical axis, respectively. This helps to allow more incident light to enter the optical lens 100 and improve the relative illumination of the optical lens 100.
[0029] The second lens L2 is designed to have negative refractive power, and its object side and image side are both concave near the optical axis. This, combined with the positive refractive power of the first lens L1, adjusts the direction of light and corrects chromatic aberration.
[0030] Setting the third lens L3 to have positive refractive power, combined with the design that its object side and image side are concave and convex near the optical axis respectively, is beneficial for guiding diverging light into the rear optical lens 100 and balancing aberrations.
[0031] The fourth lens L4 is designed to have positive refractive power, and its object side is convex near the optical axis. It is located in the middle of the optical lens 100 and can be used to adjust the height of the light and control the angle of the light incident on the fifth lens L5.
[0032] The fifth lens L5 is designed to have negative refractive power, and its object side and image side are convex and concave near the optical axis, respectively. The sixth lens L6 is designed to have positive refractive power, and its object side is convex. This makes the light converge smoothly, which helps to eliminate chromatic aberration, correct astigmatism, and improve resolution.
[0033] The seventh lens L7 is configured to have negative refractive power, and its object side is designed to be concave, so that light can smoothly transition to the imaging surface 101, correcting astigmatism and field curvature, and improving the resolving power of the optical lens 100.
[0034] Optionally, all lenses in the optical lens 100 may be made of glass, or all may be made of plastic, or some lenses may be made of glass and some of them may be made of plastic. Preferably, all lenses in the optical lens 100 are made of glass. Lenses made of glass can suppress the shift in the back focus of the optical lens 100 caused by temperature changes, thereby improving the stability of the optical lens 100. At the same time, using glass can avoid image blurring caused by high and low temperature changes in the operating environment, which would affect the normal use of the optical lens 100.
[0035] Optionally, all lenses in the optical lens 100 can be spherical lenses, which reduces production costs and makes manufacturing easier. Of course, in other embodiments, some lenses in the optical lens 100 can be spherical lenses and others can be aspherical lenses. Combining spherical and aspherical lenses can improve higher-order aberrations and enhance the imaging quality of the optical lens 100.
[0036] In some embodiments, the optical lens 100 further includes an aperture stop 102, which may be an aperture stop 102 and / or a field stop 102, and may be disposed between the image-side surface of the first lens L1 and the object-side surface of the second lens L2 of the optical lens 100. It is understood that in other embodiments, the aperture stop 102 may also be disposed between other lenses, and the setting may be adjusted according to the actual situation. This embodiment does not make specific limitations.
[0037] In some embodiments, the optical lens 100 further includes a protective glass 110 disposed between the image-side surface of the seventh lens L7 and the imaging surface 101, so that it can be close to the image sensor during subsequent assembly, thereby playing a protective role.
[0038] In some embodiments, the optical lens further includes a filter (not shown in the figure), which can be disposed between the image-side surface 72 of the seventh lens L7 and the imaging surface 101 of the optical lens 100. Of course, in other embodiments, the filter can also be disposed between other lenses, and the setting can be adjusted according to the actual situation. This embodiment does not make specific limitations.
[0039] The filter can be an infrared cut-off filter, which filters out light of other wavelengths, such as infrared light, while allowing only visible light to pass through. This makes the image more consistent with the visual experience of the human eye, thereby improving image quality. Alternatively, an infrared bandpass filter can be used, which filters out light of other wavelengths, such as visible light, while allowing only infrared light to pass through and reflecting visible light. This enables the optical lens to perform infrared imaging, allowing it to achieve better image quality in low-light environments or special application scenarios. It is understood that the filter can be made of plastic, optical glass with a coating, or an infrared cut-off filter film can be deposited on the lens to achieve the function of filtering out infrared light. The choice can be made according to actual needs, and this embodiment does not impose specific limitations.
[0040] In some embodiments, the optical lens 100 satisfies the relationship 34deg≤FOV≤42deg, where FOV is the maximum field of view of the optical lens 100. By reasonably setting the maximum field of view of the optical lens 100, a balance between field of view and good image quality can be effectively achieved.
[0041] In some embodiments, the optical lens 100 satisfies the relationship 1.5 ≤ FNO ≤ 1.65, where FNO is the aperture number of the optical lens 100. By limiting the aperture number of the optical lens 100, the light transmission capability of the optical lens 100 can be improved, resulting in higher relative illumination and good image quality even in darker environments such as at night or on rainy days, thus meeting the requirements of a large aperture and high resolution.
[0042] In some embodiments, the optical lens 100 satisfies the relationship 1.9 ≤ TTL / F ≤ 2.3, where TTL is the distance on the optical axis from the object side 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 (i.e., the total length of the optical lens 100), and F is the focal length of the optical lens 100. Satisfying the above relationship allows for reasonable control of the focal length and total length of the optical lens 100, which is beneficial for miniaturization. When the optical lens 100 exceeds the upper limit of the above relationship, the total length of the optical lens 100 is too long relative to its focal length, which is not conducive to miniaturization. When the optical lens 100 is below the lower limit of the above relationship, the focal length is too long, limiting its ability to capture scenes within a narrow range, which is not conducive to achieving the wide-angle characteristics of the optical lens 100.
[0043] In some embodiments, the optical lens 100 satisfies the relationship 2.2deg / mm ≤ FOV / F ≤ 3.4deg / mm, where FOV is the maximum field of view of the optical lens 100 and F is the focal length of the optical lens 100. By reasonably controlling the relationship between the field of view and focal length of the optical lens 100, it is beneficial for the optical lens 100 to capture wide-range scenes.
[0044] In some embodiments, the optical lens 100 satisfies the relationship 1.9 ≤ ∑CT / ∑AT ≤ 4, where ∑CT is the sum of the thicknesses of all lenses from the first lens L1 to the seventh lens L7 along the optical axis, and ∑AT is the sum of the air gaps between adjacent lenses from the first lens L1 to the seventh lens L7. By reasonably controlling the ratio of the sum of the thicknesses of all lenses along the optical axis to the sum of the air gaps between adjacent lenses from the first lens L1 to the seventh lens L7, the overall structure of the optical lens 100 becomes more compact, which is beneficial for shortening the total length of the optical lens 100, thereby achieving miniaturization of the optical lens 100. When the optical lens 100 exceeds the upper limit of the above relationship, the total thickness of the first lens L1 to the seventh lens L7 along the optical axis is too large, and the lens arrangement is too compact, which will cause the sensitivity of the optical lens 100 to increase, resulting in difficulty in aberration correction; when the optical lens 100 is below the lower limit of the above relationship, the sum of the air gaps between adjacent lenses from the first lens L1 to the seventh lens L7 increases, the field curvature increases, which is not conducive to improving the imaging quality of the optical lens 100.
[0045] In some embodiments, the optical lens 100 satisfies the relationship -4 ≤ F1 / F2 ≤ -1.5, where F1 is the focal length of the first lens L1 and F2 is the focal length of the second lens L2. Satisfying the above relationship helps to smooth the light transition and improve image quality.
[0046] In some embodiments, the optical lens 100 satisfies the relationship 1≤F3 / F≤5, where F3 is the focal length of the third lens L3 and F is the focal length of the optical lens 100. By reasonably limiting the focal lengths of the third lens L3 and the optical lens 100, it is beneficial to correct edge aberrations and improve image resolution.
[0047] In some embodiments, the optical lens 100 satisfies the relationship -1.7 ≤ F4 / F5 ≤ -0.8, where F4 is the focal length of the fourth lens L4 and F5 is the focal length of the fifth lens L5. Satisfying the above relationship helps to smooth the light transition and correct chromatic aberration.
[0048] In some embodiments, the optical lens 100 satisfies the relationship -1≤F7 / F≤-0.7, where F7 is the focal length of the seventh lens L7 and F is the focal length of the optical lens 100. By reasonably limiting the focal lengths of the seventh lens L7 and the optical lens 100, it is beneficial to improve the resolving power of the optical lens 100.
[0049] In one embodiment, the optical lens 100 satisfies the following relationships: 1.4 ≤ F1 / F ≤ 3.1, -1.1 ≤ F2 / F ≤ -0.7, 1.2 ≤ F4 / F ≤ 1.7, -1.6 ≤ F5 / F ≤ -1, and 0.5 ≤ F6 / F ≤ 0.75, where F is the focal length of the optical lens 100, F1 is the focal length of the first lens L1, F2 is the focal length of the second lens L2, F4 is the focal length of the fourth lens L4, F5 is the focal length of the fifth lens L5, and F6 is the focal length of the sixth lens L6. By satisfying the above formulas, the optical power distribution can be uniform and reasonable, aberrations can be easily corrected, and image quality can be good.
[0050] In some embodiments, the optical lens 100 satisfies the relationship 0.7≤CT5 / CT4≤3, where CT4 is the thickness of the fourth lens L4 along the optical axis and CT5 is the thickness of the fifth lens L5 along the optical axis. Satisfying the above relationship can effectively control the ratio of the center thicknesses of the fourth lens L4 and the fifth lens L5, which is beneficial for achieving miniaturization of the optical lens 100.
[0051] In some embodiments, the optical lens 100 satisfies the relationship 0.85≤CT6 / CT5≤2.1, where CT5 is the thickness of the fifth lens L5 on the optical axis and CT6 is the thickness of the sixth lens L6 on the optical axis. By rationally allocating the ratio of the thicknesses of the sixth lens L6 and the fifth lens L5 on the optical axis, the size of the optical lens 100 can be effectively reduced to avoid excessive volume, and the assembly difficulty of the lens can also be reduced, achieving higher space utilization.
[0052] In some embodiments, the optical lens 100 satisfies the relationship -13≤F2 / CT2≤-3, where CT2 is the thickness of the second lens L2 on the optical axis and F2 is the focal length of the second lens L2. Satisfying the above relationship allows for the reasonable configuration of the refractive power of the second lens L2, enabling it to work in conjunction with the first lens L1 to correct spherical aberration and thus giving the optical lens 100 good imaging quality.
[0053] In some embodiments, the optical lens 100 satisfies the relationship 1≤|R5 / R6|≤4, where R5 is the radius of curvature of the object-side surface 31 of the third lens L3 at the optical axis, and R6 is the radius of curvature of the image-side surface 32 of the third lens L3 at the optical axis. By reasonably matching the ratio between the radii of curvature of the object-side surface 31 and the image-side surface 32 of the third lens L3 at the optical axis, it is beneficial to control the shape of the third lens L3, to enable the third lens L3 to collect more light, and to increase the light transmission capability of the lens.
[0054] In some embodiments, the optical lens 100 satisfies the relationship 1.7 ≤ R9 / R10 ≤ 2.6, where R9 is the radius of curvature of the object-side surface 51 of the fifth lens L5 at the optical axis, and R10 is the radius of curvature of the image-side surface 52 of the fifth lens L5 at the optical axis. By reasonably matching the ratio between the radii of curvature of the object-side surface 51 and the image-side surface 52 of the fifth lens L5 at the optical axis, the surface shape of the fifth lens L5 can be controlled, which is beneficial to make the light emitted smoothly.
[0055] In some embodiments, the optical lens 100 satisfies the relationship 1.4 ≤ F7 / R13 ≤ 2.1, where F7 is the focal length of the seventh lens L7 and R13 is the radius of curvature of the object-side surface 71 of the seventh lens L7 at the optical axis. By rationally configuring the ratio of the focal length of the seventh lens L7 to the radius of curvature of the object-side surface 71 of the seventh lens L7, the shape of the seventh lens L7 is controlled. This allows for aberration correction, optimization of the exit angle of the principal ray, ensuring the feasibility of lens fabrication, reducing the sensitivity of the optical lens 100, and achieving high-quality imaging of the line of sight.
[0056] In some embodiments, the optical lens 100 satisfies the relationship 4.5 ≤ SD1 / SAGS1 ≤ 8.2, where SD1 is the maximum effective half-aperture of the object-side surface 11 of the first lens L1, and SAGS1 is the distance from the intersection of the object-side surface 11 of the first lens L1 and the optical axis to the maximum effective aperture of the object-side surface 11 of the first lens L1 on the optical axis (i.e., the sagitta of the object-side surface 11 of the first lens L1). By controlling the ratio of the maximum effective half-aperture of the object-side surface 11 of the first lens L1 to the sagitta of the object-side surface 11, the size of the maximum effective half-aperture of the object-side surface 11 of the first lens L1 can be effectively controlled. Combined with controlling the sagitta of the object-side surface 11 of the first lens L1, the overall volume of the first lens L1 can be compressed to a greater extent, reducing aberrations. When the optical lens 100 exceeds the upper limit of the above relationship, the maximum effective half-aperture of the object side 11 of the first lens L1 is too large. The large aperture of the first lens L1 will increase aberrations and is not conducive to the miniaturization and lightweight design of the optical lens 100. When the optical lens 100 is below the lower limit of the above relationship, the maximum effective half-aperture of the object side 11 of the first lens L1 is too small, resulting in insufficient light transmission aperture, which cannot receive light from a large field of view and affects the brightness of the edge of the image.
[0057] In some embodiments, the optical lens 100 satisfies the relationship 1.45 ≤ SAGS10 / SAGS9 ≤ 1.95, where SAGS9 is the distance from the intersection of the object-side surface 51 of the fifth lens L5 and the optical axis to the maximum effective aperture of the object-side surface 51 of the fifth lens L5 on the optical axis (i.e., the sagitta of the object-side surface 51 of the fifth lens L5), and SAGS10 is the distance from the intersection of the image-side surface 52 of the fifth lens L5 and the optical axis to the maximum effective aperture of the image-side surface 52 of the fifth lens L5 on the optical axis (i.e., the sagitta of the image-side surface 52 of the fifth lens L5). Satisfying the above relationship allows for good control of the shape of the fifth lens L5, thereby facilitating the forming and processing of the fifth lens L5.
[0058] In some embodiments, the optical lens 100 satisfies the relationship -2.3 ≤ SAGS13 / CT7 ≤ -0.3, where SAGS13 is the distance from the intersection of the object-side surface 71 of the seventh lens L7 and the optical axis to the maximum effective aperture of the object-side surface 71 of the seventh lens L7 on the optical axis (i.e., the sagitta of the object-side surface 71 of the seventh lens L7), and CT7 is the thickness of the seventh lens L7 on the optical axis. Satisfying the above relationship ensures that aberration correction requirements are met while facilitating control of the curvature of the object-side surface 71 of the seventh lens L7 and the thickness of the seventh lens L7, thereby facilitating lens manufacturing. When the optical lens 100 exceeds the upper limit of the above relationship, the absolute value of the sagitta of the image-side surface 72 of the seventh lens L7 at the maximum effective aperture is too large, which is detrimental to the surface shape control of the seventh lens L7 and increases the risk of ghosting. When the optical lens 100 is below the lower limit of the above relationship, the seventh lens L7 is too thick, affecting the miniaturization of the overall optical lens 100.
[0059] In some embodiments, the optical lens 100 satisfies the relationship 1≤SD7 / SD6≤1.25, where SD6 is the maximum effective half-aperture of the image-side surface 32 of the third lens L3, and SD7 is the maximum effective half-aperture of the object-side surface 41 of the fourth lens L4. Satisfying the above relationship gives the fourth lens L4 the characteristic of having a small aperture, which can effectively converge the light rays from the third lens L3, allowing the light rays to enter the fourth lens L4 better and ultimately enter the imaging surface 101 of the optical lens 100.
[0060] In some embodiments, the optical lens 100 satisfies the relationship 1.2 ≤ CT3 / ET3 ≤ 2.3, where CT3 is the thickness of the third lens L3 along the optical axis, and ET3 is the distance from the maximum effective half-aperture of the object side 31 of the third lens L3 to the maximum effective half-aperture of the image side 32 of the third lens L3 in the direction parallel to the optical axis (i.e., the edge thickness of the third lens L3). By controlling the relationship between the center thickness and the edge thickness of the third lens L3, the thickness ratio of the third lens L3 can be reasonably controlled, thereby optimizing the surface shape of the third lens L3, so that the light rays passing through the third lens L3 have a smaller deflection angle, thereby reducing the generation of stray light and ensuring good imaging performance.
[0061] In some embodiments, the optical lens 100 satisfies the relationship 1.6 ≤ CT6 / ET6 ≤ 3, where CT6 is the thickness of the sixth lens L6 along the optical axis, and ET6 is the distance from the maximum effective half-aperture of the object side 61 of the sixth lens L6 to the maximum effective half-aperture of the image side 62 of the sixth lens L6 in a direction parallel to the optical axis (i.e., the edge thickness of the sixth lens L6). By controlling the relationship between the center thickness and the edge thickness of the sixth lens L6, the curvature of the sixth lens L6 can be controlled, facilitating assembly and reducing higher-order aberrations, balancing field curvature and distortion, and improving image quality. When the optical lens 100 exceeds the upper limit of the above relationship, the center thickness of the sixth lens L6 is too thick and the edge thickness is too thin, affecting assembly and causing the incident angle of light at the lens edge to be too large, introducing higher-order spherical aberrations, coma, and astigmatism; when the optical lens 100 is below the lower limit of the above relationship, the center thickness of the sixth lens L6 is too small relative to the edge thickness, failing to provide sufficient refractive power, which is detrimental to the correction of astigmatism and field curvature.
[0062] In some embodiments, the optical lens 100 satisfies the relationship 27deg≤FOV*IMGH / SD1≤48deg, where FOV is the maximum field of view of the optical lens 100, IMGH is half the image height corresponding to the maximum field of view of the optical lens 100, and SD1 is the maximum effective half-aperture of the object side surface 11 of the first lens L1. Satisfying the above relationship is beneficial for reducing the front port diameter of the optical lens 100 and for achieving miniaturization.
[0063] In some embodiments, the optical lens 100 satisfies the relationship 111deg≤FOV*F / IMGH≤115deg, where FOV is the maximum field of view of the optical lens 100, F is the focal length of the optical lens 100, and IMGH is half of the image height corresponding to the maximum field of view of the optical lens 100. This is beneficial for the optical lens 100 to simultaneously satisfy characteristics such as telephoto and large field of view.
[0064] In some embodiments, the optical lens 100 satisfies the relationship 21deg≤FOV / FNO≤26deg, where FOV is the maximum field of view of the optical lens 100 and FNO is the aperture number of the optical lens 100. By reasonably controlling the relationship between the maximum field of view and the aperture number of the optical lens 100, a reasonable field of view and aperture number can be provided for the optical lens 100, which can balance the design difficulty and the requirements of the field of view.
[0065] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.
[0066] Example 1 Figure 1 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 1 of this application. The optical lens 100 includes a first lens L1, an aperture stop 102, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a protective glass 110, arranged sequentially along the optical axis from the object side to the image side. The object side 11 of the first lens L1 is convex near the optical axis, and the image side 12 of the first lens L1 is concave near the optical axis. The object side 21 of the second lens L2 is concave near the optical axis, and the image side 22 of the second lens L2 is concave near the optical axis. The object side 31 of the third lens L3 is concave near the optical axis, and the image side 32 of the third lens L3 is convex near the optical axis. The object side 41 of the fourth lens L4 is convex near the optical axis, and the image side 42 of the fourth lens L4 is convex near the optical axis. The object-side surface 51 of the fifth lens L5 is convex near the optical axis, and the image-side surface 52 of the fifth lens L5 is concave near the optical axis. The object-side surface 61 of the sixth lens L6 is convex near the optical axis, and the image-side surface 62 of the sixth lens L6 is convex near the optical axis. The object-side surface 71 of the seventh lens L7 is concave near the optical axis, and the image-side surface 72 of the seventh lens L7 is convex near the optical axis.
[0067] Specifically, taking the optical lens 100 with a focal length F=15.09mm, an aperture FNO=1.55, a maximum field of view FOV=34.32deg, and half the image height corresponding to the maximum field of view IMGH=4.616mm as an example, other parameters of the optical lens 100 are given in Table 1 below. The elements along the optical axis of the optical lens 100 from the object side to the image side are arranged sequentially according to the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 1 and 2 correspond to the object side 11 and image side 12 of the first lens L1, respectively. The Y-radius in Table 1 is the radius of curvature of the corresponding object side or image side at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis, and the second value is the distance from the image side of the lens to the next surface on the optical axis. The value of the aperture stop 102 in the "Thickness" parameter column represents the distance on the optical axis from the aperture stop 102 to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis). By default, the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When this value is negative, it indicates that the aperture stop 102 is set on the image side of the vertex of the next surface. If the thickness of the aperture stop 102 is positive, the aperture stop 102 is on the object side of the vertex of the next surface. It can be understood that the units of Y radius, thickness, and focal length in Table 1 are all mm. And the refractive index, Abbe number, focal length, etc. in Table 1 are all obtained at a reference wavelength of 587nm.
[0068] Table 1
[0069] Figure 2 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 1 of this application. Figure 2 (A) in the figure shows the spherical aberration diagrams of optical lens 100 at wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, 436 nm, and 410 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in Example 1, the spherical aberration value of the optical lens 100 is better, indicating that the imaging quality of the optical lens 100 in this example is better.
[0070] Figure 2 (B) in the figure shows the astigmatism diagram of the optical lens 100 in Example 1 at a wavelength of 546 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the image height in mm. In the astigmatism diagram, T represents the curvature of the imaging surface 101 in the meridional direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. Figure 2 As can be seen from (B) in the figure, at this wavelength, the field curvature of the optical lens 100 is small, and the field curvature and astigmatism of each field of view are well corrected. The center and edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.
[0071] Figure 2 (C) in the figure represents the distortion diagram of the optical lens 100 in Example 1 at a wavelength of 546 nm. The horizontal axis along the X-axis represents distortion, and the vertical axis along the Y-axis represents image height, in mm. Figure 2 As can be seen from (C), at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.
[0072] Example 2 Figure 3 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 2 of this application. Specifically, taking the optical lens 100 with a focal length F=15.3mm, an aperture number FNO=1.5, a maximum field of view FOV=34.6deg, and half the image height corresponding to the maximum field of view IMGH=4.649mm as an example, other parameters of the optical lens 100 are given in Table 2 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here. The refractive index, Abbe number, focal length, etc. in Table 2 are all obtained at a reference wavelength of 587nm. In addition, regarding the correspondence between the surface numbers of each lens and the object side and image side of each lens, please refer to the description in Embodiment 1 above, and will not be repeated here.
[0073] Table 2
[0074] Figure 4 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 2 of this application. Figure 4 (A) in the figure shows the spherical aberration diagrams of optical lens 100 at wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, 436 nm, and 410 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 4 As can be seen from (A) in Example 1, the spherical aberration value of the optical lens 100 is better, indicating that the imaging quality of the optical lens 100 in this example is better.
[0075] Figure 4(B) in the figure shows the astigmatism diagram of the optical lens 100 in Example 2 at a wavelength of 546 nm. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the field of view in degrees. In the astigmatism diagram, T represents the curvature of the imaging surface 101 in the meridional direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. Figure 4 As can be seen from (B) in the figure, at this wavelength, the field curvature of the optical lens 100 is small, and the field curvature and astigmatism of each field of view are well corrected. The center and edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.
[0076] Figure 4 (C) in the figure represents the distortion diagram of the optical lens 100 in Example 1 at a wavelength of 546 nm. The horizontal axis along the X-axis represents the distortion, and the vertical axis along the Y-axis represents the field of view, in degrees (deg). Figure 4 As can be seen from (C), at this wavelength, the image distortion caused by the main beam is small, and the distortion of the optical lens 100 is well corrected.
[0077] Example 3 Figure 5 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 3 of this application. Specifically, taking the optical lens 100 with a focal length F=15mm, an aperture number FNO=1.57, a maximum field of view FOV=35.4deg, and half the image height corresponding to the maximum field of view IMGH=4.711mm as an example, other parameters of the optical lens 100 are given in Table 3 below. The refractive index, Abbe number, focal length, etc., in Table 3 are all obtained at a reference wavelength of 587nm. Furthermore, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in Embodiment 1 above, which will not be repeated here.
[0078] Table 3
[0079] Please see Figure 6 ,Depend on Figure 6 As can be seen from (A) the spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be found in Example 2. Figure 4 (A) Figure 4 (B) Figure 4The content described in (C) will not be repeated here.
[0080] Example 4 Figure 7 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 4 of this application. Specifically, taking the focal length F=15.056mm, the aperture number FNO=1.61, the maximum field of view FOV=36deg, and the half of the image height corresponding to the maximum field of view IMGH=4.724mm as an example, other parameters of the optical lens 100 are given in Table 4 below. The refractive index, Abbe number, focal length, etc., in Table 4 are all obtained at a reference wavelength of 587nm. Furthermore, regarding the correspondence between the surface numbers of each lens and the object-side and image-side surfaces of each lens, please refer to the description in Embodiment 1 above, which will not be repeated here.
[0081] Table 4
[0082] Please see Figure 8 ,Depend on Figure 8 As can be seen from (A) the spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be found in Example 2. Figure 4 (A) Figure 4 (B) Figure 4 The content described in (C) will not be repeated here.
[0083] Example 5 Figure 9 This is a schematic diagram of the optical lens 100 disclosed in Embodiment 5 of this application. The object-side surface 31 of the third lens L3 is convex near the optical axis, and the image-side surface 42 of the fourth lens L4 is concave near the optical axis. The image-side surface 62 of the sixth lens L6 is concave near the optical axis. For the surface shapes of other lenses, please refer to Embodiment 1.
[0084] Specifically, taking the optical lens 100 with a focal length F=15.0541mm, an aperture FNO=1.65, a maximum field of view FOV=36.4deg, and half the image height corresponding to the maximum field of view IMGH=4.7941mm as an example, other parameters of the optical lens 100 are given in Table 5 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, focal length, etc., in Table 5 are all obtained at a reference wavelength of 587nm.
[0085] Table 5
[0086] Please see Figure 10 ,Depend on Figure 10 As can be seen from (A) the spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 10 (A) Figure 10 (B) and Figure 10 The wavelengths corresponding to the curves in (C) can be found in Example 2. Figure 4 (A) Figure 4 (B) Figure 4 The content described in (C) will not be repeated here.
[0087] Example 6 Figure 11 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 6 of this application. In this embodiment, the image-side surface 62 of the sixth lens L6 is concave near the optical axis, and the image-side surface 72 of the seventh lens L7 is flat near the optical axis. For the surface shapes of other lenses, please refer to Embodiment 1.
[0088] Specifically, taking the optical lens 100 with a focal length F=12.49mm, an aperture FNO=1.65, a maximum field of view FOV=42deg, and half the image height corresponding to the maximum field of view IMGH=4.7031mm as an example, other parameters of the optical lens 100 are given in Table 6 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, focal length, etc., in Table 6 are all obtained at a reference wavelength of 587nm.
[0089] Table 6
[0090] Please see Figure 12 ,Depend on Figure 12As can be seen from (A) the spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 12 (A) Figure 12 (B) and Figure 12 The wavelengths corresponding to the curves in (C) can be found in Example 2. Figure 4 (A) Figure 4 (B) Figure 4 The content described in (C) will not be repeated here.
[0091] Example 7 Figure 13 This is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 7 of this application. In this embodiment, the image-side surface 42 of the fourth lens L4 is concave near the optical axis, and the image-side surface 72 of the seventh lens L7 is flat near the optical axis. For the surface shapes of other lenses, please refer to Embodiment 1.
[0092] Specifically, taking the optical lens 100 with a focal length F=14.5mm, an aperture FNO=1.65, a maximum field of view FOV=38deg, and half the image height corresponding to the maximum field of view IMGH=4.8344mm as an example, other parameters of the optical lens 100 are given in Table 7 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. Furthermore, the refractive index, Abbe number, focal length, etc., in Table 7 are all obtained at a reference wavelength of 587nm.
[0093] Table 7
[0094] Please see Figure 14 ,Depend on Figure 14 As can be seen from (A) the spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 14 (A) Figure 14 (B) and Figure 14 The wavelengths corresponding to the curves in (C) can be found in Example 2. Figure 4 (A) Figure 4 (B) Figure 4 The content described in (C) will not be repeated here.
[0095] Please refer to Table 8, which summarizes the ratios of the relationships in Embodiments 1 to 7 of this application.
[0096] Table 8
[0097] Please see Figure 15 This application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any of embodiments 1 to 7 above. The image sensor 201 is disposed on the image side of the optical lens 100. The photosensitive surface of the image sensor 201 is located on the imaging surface 101 of the optical lens 100, and light rays from an object passing through the lens and incident on the photosensitive surface can be converted into electrical signals of an image. The image sensor 201 can be a complementary metal oxide semiconductor (CMOS) or a charge-coupled device (CCD). The camera module 200 can be an imaging module integrated on a terminal device 300, or it can be a standalone lens. It is understood that the camera module 200 with the aforementioned optical lens 100 has all the technical effects of the aforementioned optical lens 100, that is, the camera module 200 can meet the requirements of high resolution while also having a large aperture and high relative illumination. Since the above-mentioned technical effects have been described in detail in the embodiments of optical lens 100, they will not be repeated here.
[0098] This application also discloses a terminal device 300, which includes a housing 301 and the aforementioned camera module 200, with the camera module 200 disposed within the housing 301. The terminal device 300 may include, but is not limited to, mobile phones, tablets, laptops, smartwatches, in-vehicle devices, drones, and surveillance cameras. Please refer to [link / reference]. Figure 16 If the terminal device 300 is a vehicle, then the housing 301 can be the vehicle body, and the camera module 200 can be installed on the vehicle body, for example, inside or outside the vehicle body.
[0099] It is understood that the terminal device 300 with the aforementioned camera module 200 also possesses all the technical effects of the aforementioned optical lens 100. That is, the terminal device 300 is able to meet the requirements of high resolution while also maintaining a large aperture and high relative illumination. Since the aforementioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.
[0100] The optical lens, camera module, and terminal device disclosed in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the optical lens, camera module, and terminal device of this application and their core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. An optical lens, characterized in that, There are a total of seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object side to the image side; The first lens has positive refractive power, the object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis. The second lens has negative refractive power, the object side of the second lens is concave near the optical axis, and the image side of the second lens is concave near the optical axis. The third lens has positive refractive power, and the image-side surface of the third lens is convex near the optical axis; The fourth lens has positive refractive power, and the object side of the fourth lens is convex near the optical axis; The fifth lens has negative refractive power, the object side of the fifth lens is convex near the optical axis, and the image side of the fifth lens is concave near the optical axis. The sixth lens has positive refractive power, and the object side of the sixth lens is convex near the optical axis; The seventh lens has negative refractive power, and the object side of the seventh lens is concave near the optical axis; The optical lens satisfies the following relationship: 34deg≤FOV≤42deg、1.5≤FNO≤1.65; Wherein, FOV is the maximum field of view of the optical lens, and FNO is the aperture number of the optical lens.
2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1.9≤TTL / F≤2.3, and / or, 2.2deg / mm≤FOV / F≤3.4deg / mm, and / or, 1.9≤∑CT / ∑AT≤4; Wherein, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, F is the focal length of the optical lens, ∑CT is the sum of the thicknesses of all lenses from the first lens to the seventh lens on the optical axis, and ∑AT is the sum of the air gaps between two adjacent lenses from the first lens to the seventh lens.
3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: -4≤F1 / F2≤-1.5, and / or, 1≤F3 / F≤5, and / or, -1.7≤F4 / F5≤-0.8, and / or, -1≤F7 / F≤-0.7; Wherein, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, F7 is the focal length of the seventh lens, and F is the focal length of the optical lens.
4. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 0.7≤CT5 / CT4≤3, and / or, 0.85≤CT6 / CT5≤2.1, and / or, -13≤F2 / CT2≤-3; Wherein, CT2 is the thickness of the second lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and F2 is the focal length of the second lens.
5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1≤|R5 / R6|≤4, and / or, 1.7≤R9 / R10≤2.6, and / or, 1.4≤F7 / R13≤2.1; Wherein, R5 is the radius of curvature of the object side of the third lens at the optical axis, R6 is the radius of curvature of the image side of the third lens at the optical axis, F7 is the focal length of the seventh lens, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, R10 is the radius of curvature of the image side of the fifth lens at the optical axis, and R13 is the radius of curvature of the object side of the seventh lens at the optical axis.
6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 4.5≤SD1 / SAGS1≤8.2, and / or, 1.45≤SAGS10 / SAGS9≤1.95, and / or, -2.3≤SAGS13 / CT7≤-0.3; Wherein, SD1 is the maximum effective half-aperture of the object-side surface of the first lens, SAGS1 is the distance from the intersection of the object-side surface of the first lens and the optical axis to the maximum effective aperture of the object-side surface of the first lens on the optical axis, SAGS9 is the distance from the intersection of the object-side surface of the fifth lens and the optical axis to the maximum effective aperture of the object-side surface of the fifth lens on the optical axis, SAGS10 is the distance from the intersection of the image-side surface of the fifth lens and the optical axis to the maximum effective aperture of the image-side surface of the fifth lens on the optical axis, SAGS13 is the distance from the intersection of the object-side surface of the seventh lens and the optical axis to the maximum effective aperture of the object-side surface of the seventh lens on the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.
7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1≤SD7 / SD6≤1.25, and / or, 1.2≤CT3 / ET3≤2.3, and / or, 1.6≤CT6 / ET6≤3; Wherein, SD6 is the maximum effective half-aperture of the image side of the third lens, SD7 is the maximum effective half-aperture of the object side of the fourth lens, CT3 is the thickness of the third lens on the optical axis, ET3 is the distance from the maximum effective half-aperture of the object side of the third lens to the maximum effective half-aperture of the image side of the third lens in the direction parallel to the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance from the maximum effective half-aperture of the object side of the sixth lens to the maximum effective half-aperture of the image side of the sixth lens in the direction parallel to the optical axis.
8. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 27deg≤FOV*IMGH / SD1≤48deg, and / or, 111deg≤FOV*F / IMGH≤115deg, and / or, 21deg≤FOV / FNO≤26deg; Wherein, IMGH is half the image height corresponding to the maximum field of view of the optical lens, SD1 is the maximum effective half-aperture of the object side of the first lens, and F is the focal length of the optical lens.
9. A camera module, characterized in that, The camera module includes an image sensor and an optical lens as described in any one of claims 1-8, wherein the image sensor is disposed on the image side of the optical lens.
10. A terminal device, characterized in that, It includes a housing and a camera module as described in claim 9, wherein the camera module is disposed on the housing.