Optical lens, camera module and electronic equipment

Abstract

The invention relates to the technical field of optical lenses, provides an optical lens, a camera module and electronic equipment, and can solve the problem that the optical lens in the prior art is large in chromatic aberration during anti-shake. The optical lens comprises a front lens group and a rear lens group located on the image side of the front lens group. The front lens group is a prism assembly and has positive focal power, the front lens group comprises a main body part, a first refraction part and a second refraction part, and the main body part is used for reflecting light passing through the first refraction part to the second refraction part; the first refraction part and the main body part are tightly connected or integrally formed, the second refraction part and the main body part are tightly connected or integrally formed, the first refraction part and the main body part integrally form an equivalent lens with positive focal power, and the second refraction part has negative focal power; the front lens group is an anti-shake lens group, and the chromatic aberration coefficient C0 of the front lens group is larger than or equal to-1.0 * 10 <-3 > and smaller than or equal to 1.0 * 10 <-3 >. The method can be applied to electronic equipment such as a mobile phone.

Description

[0001] This application claims priority to Chinese patent application filed on August 28, 2025, with application number 202511222352.6 and entitled "A telephoto lens, a telephoto camera module and an electronic device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of optical lens technology, and in particular to an optical lens, camera module and electronic device. Background Technology

[0003] Currently, camera modules have become an indispensable key component in various electronic devices such as mobile phones and tablets. Through camera modules, people can easily capture wonderful moments, satisfying diverse photography needs such as daily life, work recording, and social sharing. A camera module mainly consists of an optical lens and a photosensitive element. Its working principle is as follows: light, after being focused by the optical lens, shines onto the photosensitive element. The photosensitive element converts the light signal into an electrical signal, which is then processed by an image signal processor. Finally, the processed digital image signal is output to the display screen or storage device of the electronic device, forming the photos or videos we see.

[0004] With the development of electronic technology, users' demands for image quality are constantly increasing. Telephoto lenses, capable of capturing distant objects clearly, have become a core function of mid-to-high-end electronic devices. However, traditional telephoto lenses need to extend along the thickness of electronic devices, contradicting the design trend of "thinner and lighter" devices. Periscope lenses, through the light-path redirection effect of prism components, can fold the light path inside the device, achieving telephoto imaging within a limited body thickness. This effectively resolves the technical conflict between "telephoto" and "thinner and lighter," and has therefore quickly become the mainstream choice for optical lenses in electronic devices.

[0005] To ensure the image quality of periscope optical lenses when electronic devices shake, image stabilization design of periscope optical lenses has become one of the important topics in the industry. Summary of the Invention

[0006] Embodiments of this application provide an optical lens, a camera module, and an electronic device to solve the problem of large chromatic aberration in optical lenses during image stabilization in related technologies.

[0007] To achieve the above objectives, the embodiments of this application adopt the following technical solutions: In a first aspect, embodiments of this application provide an optical lens, including a front lens group and a rear lens group located on the image side of the front lens group; the front lens group is a prism assembly with positive optical power, the front lens group includes a main body, a first refractive part located on the light-incident side of the main body, and a second refractive part located on the light-outceasing side of the main body, the main body being used to reflect light passing through the first refractive part to the second refractive part, and then direct the light from the second refractive part to the rear lens group; the first refractive part is closely connected to or integrally formed with the main body, the second refractive part is closely connected to or integrally formed with the main body, the material of the first refractive part is the same as the material of the main body, the first refractive part and the main body together constitute an equivalent lens with positive optical power, and the second refractive part has negative optical power; the front lens group is an image-stabilized lens group, and is rotatable about at least one of a first axis, a second axis, and a third axis; wherein, the first axis is parallel to the optical axis of the first refractive part, the second axis is parallel to the optical axis of the second refractive part, and the third axis is perpendicular to both the first axis and the second axis; the chromatic aberration coefficient C0 of the front lens group satisfies: -1.0×10 -3 ≤C0= ≤1.0×10 -3 ; in, The equivalent lens power is [value missing]. The optical power of the second refractive section; v a v is the Abbe number of the equivalent lens. b d0 is the Abbe number of the second refractive part; d0 is the distance from the image-side principal plane of the equivalent lens to the object-side principal plane of the second refractive part along the optical axis of the optical lens.

[0008] In this embodiment of the optical lens, the chromatic aberration coefficient C0 of the front lens group is set to -1.0 × 10⁻⁶. -3 ≤C0≤1.0×10 -3The solution involves controlling the chromatic aberration coefficient C0 of the front lens group to a smaller value. This reduces the contribution of the front lens group to the chromatic aberration of the optical lens, thereby reducing chromatic aberration and improving the image quality of the optical lens. In this embodiment, the chromatic aberration coefficient C0 of the front lens group is controlled by adjusting parameters such as the optical power and Abbe number of the equivalent lens and the second refractive section. This reduces the contribution of the front lens group to the chromatic aberration of the optical lens, resulting in smaller chromatic aberration under different image stabilization modes (e.g., rotation around different axes for stabilization). (If the chromatic aberration of the front lens group is corrected solely by the structural design of the rear lens group, the rear lens group's chromatic aberration correction effect under different image stabilization modes is poor.) This reduces the design difficulty of chromatic aberration correction for the rear lens group, thus helping to reduce the design cost of the optical lens.

[0009] In some embodiments of the first aspect, the chromatic aberration coefficient C0 of the front lens group satisfies: -3.4 × 10⁻⁶. -4 ≤C0≤3.4×10 -4 Or, -2.5×10 -4 ≤C0≤2.5×10 -4 Or, -1.5×10 -4 ≤C0≤1.5×10 -4 Or, -5.0×10 -5 ≤C0≤5.0×10 -5 This configuration further reduces the contribution of the front lens group G0 to the chromatic aberration of the optical lens, thereby further reducing the chromatic aberration of the optical lens and improving the imaging quality of the optical lens.

[0010] In some embodiments of the first aspect, the effective focal length f of the equivalent lens L0a The effective focal length f of the optical lens satisfies: 0.64 ≤ f / f L0a ≤1.77; or, 0.74≤f / f L0a ≤0.95; or, 0.74≤f / f L0a ≤0.91; or, 0.74≤f / f L0a ≤0.87. This setting not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens smaller, but also avoids a large total optical length of the optical lens, which helps to reduce the size of the optical lens.

[0011] In some embodiments of the first aspect, the effective focal length f of the equivalent lens L0a The effective focal length f of the optical lens satisfies: 26mm ≤ f L0a ≤34mm, 20mm≤f≤30mm; or, 26mm≤f L0a≤48mm, 20mm≤f≤47mm; or, 12.6mm≤f L0a ≤98.6mm, 9.3mm≤f≤73mm. This setting not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens smaller, but also avoids a large total optical length of the optical lens, which helps to reduce the size of the optical lens.

[0012] In some embodiments of the first aspect, the effective focal length f of the front lens group g0 The effective focal length f of the optical lens satisfies: 0.21 ≤ f / f g0 ≤0.52; or, 0.35≤f / f g0 ≤0.52; or, 0.35≤f / f g0 ≤0.47; or, 0.35≤f / f g0 ≤0.43. This setting not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens smaller, but also avoids a large total optical length of the optical lens, which helps to reduce the size of the optical lens.

[0013] In some embodiments of the first aspect, the effective focal length f of the front lens group g0 The effective focal length f of the optical lens satisfies: 50mm ≤ f g0 ≤70mm, 20mm≤f≤30mm; or, 50mm≤f g0 ≤158mm, 23mm≤f≤47mm; or, 26.5mm≤f g0 ≤208.6mm, 9.3mm≤f≤73mm. This setting not only helps to reduce the chromatic aberration coefficient C0, thus minimizing chromatic aberration in the optical lens, but also improves the image quality of the optical lens during image stabilization. In addition, it avoids a large overall optical length of the optical lens, which helps to reduce the size of the optical lens.

[0014] In some embodiments, the refractive index n of the equivalent lens a And Abbe number v a The refractive index n of the second refractive section b And Abbe number v a Satisfy: n a ≠n b ;v a ≠v b This configuration allows for the correction of chromatic aberration in the front lens group by utilizing the difference in refractive index and Abbe number between the equivalent lens and the second refractive part, thus helping to reduce chromatic aberration in the optical lens.

[0015] In some embodiments of the first aspect, the Abbe number v of the equivalent lens a and refractive index na The Abbe number v of the second refractive section b and refractive index n b Satisfy: v a >v b ;n a <n b This configuration allows the effective focal length f of the front lens group to be maximized. g0 The larger value helps to reduce the chromatic aberration coefficient C0, which in turn helps to reduce the chromatic aberration of the optical lens.

[0016] In some embodiments of the first aspect, the Abbe number v of the equivalent lens a and refractive index n a The Abbe number v of the second refractive section b and refractive index n b Satisfy: v a <v b ;n a >n b This configuration allows for the correction of chromatic aberration in the front lens group by utilizing the difference in refractive index and Abbe number between the equivalent lens and the second refractive part, thus helping to reduce chromatic aberration in the optical lens.

[0017] In some embodiments of the first aspect, the Abbe number v of the equivalent lens a The Abbe number v of the second refractive section b Satisfy: 63≤v a ≤83, 30≤v b ≤55. This setting allows the effective focal length f of the front lens group to be ≤55. g0 A larger value is beneficial for reducing the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens.

[0018] In some embodiments of the first aspect, the Abbe number v of the equivalent lens a The Abbe number v of the second refractive section b Satisfy: v a ≠v b Furthermore, 34≤v a ≤83, 25≤v b ≤55; or, 34≤v a ≤95, 25≤v b ≤71; or, 23≤v a ≤95, 23≤v b ≤95. This setting allows for the correction of chromatic aberration in the front lens group by utilizing the Abbe number difference between the equivalent lens and the second refractive part made of different materials, thereby helping to reduce chromatic aberration in the optical lens.

[0019] In some embodiments of the first aspect, the refractive index n of the equivalent lensa The refractive index n of the second refractive section b Satisfies: 1.48≤n a ≤1.53; 1.66≤n b ≤1.70. This setting allows the effective focal length f of the front lens group to be ≤1.70. g0 A larger value is beneficial for reducing the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens.

[0020] In some embodiments of the first aspect, the refractive index n of the equivalent lens a The refractive index n of the second refractive section b Satisfy: n a ≠n b Furthermore, 1.42 ≤ n a ≤1.75, 1.56≤n b ≤1.81; or, 1.42≤n a ≤1.59, 1.56≤n b ≤1.75; or, 1.42≤n a ≤1.84, 1.42≤n b ≤1.84. This setting allows for the correction of chromatic aberration in the front lens group by utilizing the difference in refractive index between the equivalent lens and the second refractive part, thus helping to reduce chromatic aberration in the optical lens.

[0021] In some embodiments of the first aspect, the object-side surface of the equivalent lens is at least partially convex, and the convex surface is curved towards the object side of the equivalent lens so that the optical power of the equivalent lens is positive; the image-side surface of the second refractive portion is at least partially concave, and the concave surface is curved towards the object side of the second refractive portion so that the optical power of the second refractive portion is negative. With this configuration, by controlling parameters such as the convex and concave surface shapes and the radius of curvature, the optical power of the equivalent lens and the second refractive portion can be controlled, and thus the magnitude of the chromatic aberration coefficient C0 can be controlled.

[0022] In some embodiments of the first aspect, the radius of curvature r of the convex surface at the optical axis position of the optical lens a Satisfies: 12.9mm≤r a ≤16.6mm; or, 12.9mm≤r a ≤37mm; or, 9.5mm≤r a ≤155mm. This setting not only helps to reduce the chromatic aberration coefficient C0, thus reducing the chromatic aberration of the optical lens, but also avoids a large total optical length of the optical lens, which helps to reduce the size of the optical lens.

[0023] In some embodiments of the first aspect, at least one of the convex surface and the concave surface is aspherical. This configuration allows for better correction of aberrations such as spherical aberration in the optical lens, eliminating the need for additional lenses in the rear lens group to correct these aberrations and thus helping to reduce the overall length of the optical lens.

[0024] In some embodiments of the first aspect, both the convex and concave surfaces are aspherical. This arrangement allows for the use of more aspherical surfaces to correct aberrations such as spherical aberration in the optical lens. Consequently, the rear lens group does not require additional lenses to correct these aberrations, thus helping to shorten the overall length of the optical lens.

[0025] In some embodiments, both the convex and concave surfaces can be spherical. This configuration reduces the manufacturing difficulty of the convex and concave surfaces, thereby helping to reduce the manufacturing cost of the front lens assembly.

[0026] In some embodiments of the first aspect, the chromatic aberration coefficient C0 of the front lens group and the Abbe number v of the equivalent lens are... a and refractive index n a The Abbe number v of the second refractive section b and refractive index n b The radius of curvature r of the convex surface at the optical axis position of the optical lens a The radius of curvature r of the concave surface at the optical axis position of the optical lens b The thickness d of the equivalent lens on the optical axis of the optical lens ap The thickness d of the second refractive part at the optical axis position of the optical lens b satisfy: -3.4×10 -4 ≤C0= ≤3.4×10 -4 .

[0027] This configuration allows for a smaller chromatic aberration coefficient C0 of the front lens group, which further reduces the contribution of the front lens group G0 to the chromatic aberration of the optical lens. This, in turn, further reduces the chromatic aberration of the optical lens and improves its imaging quality.

[0028] In some embodiments of the first aspect, the thickness d of the first refractive portion at the optical axis position of the optical lens a The thickness d of the second refractive part at the optical axis position of the optical lens b The thickness d of the main body at the optical axis position of the optical lens p Satisfies: 1.8mm≤d a ≤2.5mm, 0.89mm≤d b ≤1.06mm, 7.7mm≤dp ≤9.9mm; or, 1.8mm≤d a ≤2.8mm, 0.54mm≤d b ≤1.06mm, 7.7mm≤d p ≤12.8mm. This setting allows the effective focal length f of the front lens group to be ≤12.8mm. g0 A larger C0 results in a smaller chromatic aberration coefficient C0, which reduces chromatic aberration in the optical lens and thus improves its imaging quality.

[0029] In some embodiments of the first aspect, the main body includes a reflecting prism; the first refractive part and the second refractive part are both lenses; the image-side surface of the first refractive part is in close contact with the incident surface of the reflecting prism; and the object-side surface of the second refractive part is in close contact with the exit surface of the reflecting prism. This arrangement increases the number of optical surfaces in the front lens group, which is beneficial for increasing the degrees of freedom in aberration correction, thereby facilitating the correction of the overall aberrations generated by the front lens group. The main body, the first refractive part, and the second refractive part are joined in close contact, which is beneficial for correcting aberrations such as chromatic aberration, spherical aberration, coma, and astigmatism in the front lens group, thereby improving the imaging quality of the optical lens.

[0030] In some embodiments of the first aspect, the front lens group includes a reflecting prism integrally formed, with the first refractive portion and the main body portion each being a part of the reflecting prism; the main body portion includes the reflecting surface of the reflecting prism; the first refractive portion includes the incident surface of the reflecting prism; the second refractive portion is a lens, and the object-side surface of the second refractive portion is in close contact with the exit surface of the reflecting prism. This arrangement reduces the number of optical elements in the front lens group, thereby simplifying the assembly process of the front lens group and improving the assembly efficiency of the optical lens; by joining the reflecting prism and the second refractive portion in a close manner, the number of optical surfaces in the front lens group is increased, which increases the degrees of freedom for aberration correction, thus facilitating the correction of aberrations such as chromatic aberration, spherical aberration, coma, and astigmatism in the front lens group.

[0031] In some embodiments of the first aspect, the front lens group includes a reflecting prism integrally formed, wherein the first refractive portion, the second refractive portion, and the main body portion are each part of the reflecting prism; the main body portion includes the reflecting surface of the reflecting prism; the first refractive portion includes the incident surface of the reflecting prism; and the second refractive portion includes the exit surface of the reflecting prism. This arrangement reduces the number of optical elements in the front lens group, thereby simplifying the assembly process of the front lens group and improving the assembly efficiency of the optical lens.

[0032] In some embodiments of the first aspect, the density ρ of the main body portion satisfies: ρ≤3.92g / cm³3 That is: the density ρ of the reflecting prism p ≤3.92g / cm 3 This design reduces the weight of the front lens assembly, thereby reducing the load on the drive motor when the front lens assembly is performing image stabilization, which in turn reduces the energy consumption of the drive motor and improves the battery life of the electronic device.

[0033] The main body is made of low-density materials, such as heavy flint glass, lanthanide optical glass, and resin.

[0034] In some embodiments of the first aspect, the density ρ of the reflecting prism p Satisfy: ρ p ≤3.2g / cm 3 This design reduces the weight of the reflecting prism, thereby reducing the load on the drive motor when the front lens assembly is performing image stabilization, which in turn reduces the energy consumption of the drive motor and improves the battery life of electronic devices.

[0035] In some embodiments of the first aspect, the materials of the first refractive part and the second refractive part are glass and cyclic olefin copolymers. This arrangement can prevent the first and second refractive parts from absorbing water, which would cause optical surface deformation and optical path deviation, thereby helping to minimize the aberrations of the optical lens.

[0036] In some embodiments of the first aspect, the rear lens group includes a first lens group and a second lens group located on the image side of the first lens group: the first lens group has positive optical power, and the second lens group has negative optical power. This arrangement allows for the cancellation of some aberrations, thereby facilitating the correction of aberrations in the optical lens.

[0037] In some embodiments of the first aspect, the first lens group is a focusing lens group and is movable relative to the second lens group along the optical axis of the first lens group. This configuration can shorten the focusing travel of the first lens group.

[0038] In some embodiments of the first aspect, the effective focal length f of the front lens group g0 The combined focal length f of the front lens group and the first lens group g01 The effective focal length f, the first optical power allocation coefficient α, the second optical power allocation coefficient β, and the focusing stroke compression ratio ξ of the optical lens satisfy: 1.15 ≤ ξ = (1 - β) 2 )α 2 ≤1.56; or, 1.15≤ξ=(1-β) 2 )α 2 ≤1.65; or, 1.15≤ξ=(1-β) 2 )α2 ≤2.2; where α=f / f g01 ;β=f g01 / f g0 This configuration reduces the focusing distance of the first lens group, which helps to reduce the size of the drive motor for the first lens group; it also avoids the focusing distance of the first lens group being too short, which would reduce the accuracy requirements of the drive motor for the first lens group and help to reduce the manufacturing cost of the camera module.

[0039] In some embodiments of the first aspect, the combined focal length f of the front lens group and the first lens group is... g01 The effective focal length f and the first optical power allocation coefficient α of the optical lens satisfy: 1.1 ≤ α ≤ 1.52; where α = f / f g01 This configuration reduces the focusing distance of the first lens group, which helps to reduce the size of the drive motor for the first lens group; it also avoids the focusing distance of the first lens group being too short, thus reducing the accuracy requirements of the drive motor for the first lens group.

[0040] In some embodiments of the first aspect, the effective focal length f of the front lens group g0 The combined focal length f of the front lens group and the first lens group g01 The second power distribution coefficient β satisfies: 0.18 ≤ β ≤ 0.39; where β = f g01 / f g0 This configuration reduces the focusing distance of the first lens group, which helps to reduce the size of the drive motor for the first lens group; it also avoids the focusing distance of the first lens group being too short, thus reducing the accuracy requirements of the drive motor for the first lens group.

[0041] In some embodiments of the first aspect, the first lens group has four lenses, arranged sequentially as a positive lens, a negative lens, a positive lens, and a positive lens along the object-to-image direction; the second lens group has two lenses, arranged sequentially as a positive lens and a negative lens along the object-to-image direction; or, the second lens group has four lenses, arranged sequentially as a negative lens, a negative lens, a positive lens, and a negative lens along the object-to-image direction. This arrangement allows for the cancellation of some aberrations, thereby facilitating the correction of aberrations in the optical lens.

[0042] In some embodiments of the first aspect, the second lens group is a focusing lens group and is movable relative to the first lens group along the optical axis of the second lens group.

[0043] In some embodiments of the first aspect, the optical lens further includes a light path reversing element disposed on the image side of the rear lens group. The light path reversing element is a prism, with its incident surface facing the side where the rear lens group is located and its exit surface facing the side where the image plane of the optical lens is located. The reflecting surface of the light path reversing element is used to reflect light rays passing through the rear lens group and the incident surface of the light path reversing element to the exit surface of the light path reversing element and then emit them.

[0044] In some embodiments of the first aspect, the optical lens further includes a light path reversing element disposed on the image side of the rear lens group, and the light path reversing element is a reflector.

[0045] Secondly, embodiments of this application provide a camera module, including a photosensitive element and the optical lens described in the first aspect, wherein the photosensitive element is disposed on the image side of the optical lens.

[0046] The beneficial effects of the camera module in this embodiment are the same as those of the optical lens in the first aspect, and will not be repeated here.

[0047] Thirdly, embodiments of this application provide an electronic device, including a housing and the camera module described in the second aspect, wherein the camera module is mounted on the housing.

[0048] The beneficial effects of the electronic device in this embodiment are the same as those of the optical lens in the first aspect, and will not be repeated here.

[0049] In some embodiments of the third aspect, the electronic device is a mobile phone or a tablet computer. Attached Figure Description

[0050] Figure 1a A schematic diagram defining the image-side principal plane and image-side principal point of an optical system; Figure 1b A schematic diagram defining the object-side principal plane and object-side principal point of an optical system; Figure 1c A schematic diagram illustrating the definitions of object distance and image distance in an optical system; Figure 1d This is a schematic diagram of the structure of a camera module in related technologies; Figure 2a This is a schematic diagram of the back of an electronic device (mobile phone) in some embodiments of this application; Figure 2b for Figure 2a A cross-sectional view of the electronic equipment in the picture; Figure 3 This is a schematic diagram of the camera module in the first embodiment of this application; Figure 4 for Figure 3 A schematic diagram of the front lens assembly shown in one viewpoint; Figure 5a for Figure 3 The optical path diagram of the front lens group when it rotates around the third axis at different angles; Figure 5b for Figure 3 Axial chromatic aberration curve of the optical lens when the front lens group is not under image stabilization. Figure 5c for Figure 3 The axial chromatic aberration curve of the optical lens when the front lens group rotates 0.5° around the third axis; Figure 5d for Figure 3 The axial chromatic aberration curve of the optical lens when the front lens group rotates 5° around the third axis; Figure 6a for Figure 3 Schematic diagram of the calculation principle for achromatic correction in the center front lens group; Figure 6b for Figure 3 Simplified calculation model diagram of the front and middle lens group; Figure 7 for Figure 3 A schematic diagram illustrating one focusing method of the optical lens shown; Figure 8 for Figure 3 The diagram shows another focusing method of the optical lens shown. Figure 9 This is a schematic diagram of the camera module in the second embodiment of this application; Figure 10 This is a schematic diagram of the camera module in the third embodiment of this application; Figure 11 This is a schematic diagram of the camera module in the fourth embodiment of this application; Figure 12a This is an optical path diagram of the camera module's optical lens during the focusing process in the fifth embodiment of this application; Figure 12b The effective focal length f of the front lens group in the optical lens of the fifth embodiment of this application is... g0 The effective focal length f of the equivalent lens L0a The effective focal length f of the second refractive section L0b A curve showing the relationship between the color difference coefficient C0 and the color difference coefficient C0. Figure 12c The effective focal length f of the convex surface and front lens group in the optical lens of the fifth embodiment of this application is... g0 The effective focal length f of the equivalent lens L0a Relationship curve diagram; Figure 12dThe refractive index n of the equivalent lens in the optical lens of the fifth embodiment of this application a With the effective focal length f of the front lens group g0 The effective focal length f of the equivalent lens L0a Abbe number v of the equivalent lens a Relationship curve diagram; Figure 12e The refractive index n of the equivalent lens in the optical lens of the fifth embodiment of this application a A graph showing the relationship between the chromatic aberration coefficient C0 of the front lens group and the front lens group. Figure 12f The refractive index n of the second refractive part in the optical lens in the fifth embodiment of this application. b With the effective focal length f of the front lens group g0 The effective focal length f of the second refractive section L0b Abbe number v of the second refractive section b Relationship curve diagram; Figure 12g The refractive index n of the second refractive part in the optical lens in the fifth embodiment of this application. b A graph showing the relationship between the chromatic aberration coefficient C0 of the front lens group and the front lens group. Figure 12h The thickness d in the optical lens in the fifth embodiment of this application a Thickness d b Thickness d p With the effective focal length f of the front lens group g0 Relationship curve diagram; Figure 12i The thickness d in the optical lens in the fifth embodiment of this application a Thickness d b Thickness d p A graph showing the relationship between the chromatic aberration coefficient C0 of the front lens group and the front lens group. Figure 12j This is an aberration curve of the optical lens in the fifth embodiment of this application when focusing on a distant scene (working distance is infinite) and image height is 0mm. Figure 12k This is an aberration curve of the optical lens in the fifth embodiment of this application when focusing on a distant scene (working distance is infinite) and the image height is 4.8494 mm; Figure 12l This is an axial chromatic aberration curve of the optical lens in the fifth embodiment of this application when focusing on a distant scene (working distance is infinite); Figure 13a This is an optical path diagram of the camera module's optical lens during the focusing process in the sixth embodiment of this application; Figure 13bThis is an aberration curve of the optical lens in the sixth embodiment of this application when focusing on a distant scene (working distance is infinite) and image height is 0mm. Figure 13c This is an aberration curve of the optical lens in the sixth embodiment of this application when focusing on a distant scene (working distance is infinite) and the image height is 4.5760 mm. Figure 13d This is an axial chromatic aberration curve of the optical lens in the sixth embodiment of this application when focusing on a distant scene (working distance is infinite). Figure 14a This is an optical path diagram of the camera module's optical lens during the focusing process in the seventh embodiment of this application; Figure 14b This is an aberration curve of the optical lens in the seventh embodiment of this application when focusing on a distant scene (working distance is infinite) and image height is 0mm. Figure 14c This is an aberration curve of the optical lens in the seventh embodiment of this application when focusing on a distant scene (working distance is infinite) and image height is 4.7145mm; Figure 14d This is an axial chromatic aberration curve of the optical lens in the seventh embodiment of this application when focusing on a distant scene (working distance is infinite); Figure 15a This is an optical path diagram of the camera module's optical lens during the focusing process in the eighth embodiment of this application; Figure 15b The field curvature curve and distortion curve of the optical lens in the eighth embodiment of this application when focusing on a distant scene (working distance is infinite); Figure 15c This is an axial chromatic aberration curve of the optical lens in the eighth embodiment of this application when focusing on a distant scene (working distance is infinite). Figure 16a This is an optical path diagram of the camera module's optical lens during the focusing process in the ninth embodiment of this application; Figure 16b The field curvature curve and distortion curve of the optical lens in the ninth embodiment of this application when focusing on a distant scene (working distance is infinite); Figure 16c This is an axial chromatic aberration curve of the optical lens in the ninth embodiment of this application when focusing on a distant scene (working distance is infinite). Figure 17a This is an optical path diagram of the camera module's optical lens during the focusing process in the tenth embodiment of this application; Figure 17b The field curvature curve and distortion curve of the optical lens in the tenth embodiment of this application when focusing on a distant scene (working distance is infinite); Figure 17cThis is an axial chromatic aberration curve of the optical lens in the tenth embodiment of this application when focusing on a distant scene (working distance is infinite). Detailed Implementation

[0051] The technical terms used in the embodiments of this application are explained and described below.

[0052] Optical power, expressed as the reciprocal of the image-side focal length (approximately assuming the refractive index of air is 1), characterizes the ability of an optical lens to deflect light. Lenses or lens groups with positive optical power have a positive focal length and converge light rays. Lenses or lens groups with negative optical power have a negative focal length and diverge light rays.

[0053] A positive lens, also known as a converging lens or convex lens, has the function of converging light rays. Convex lenses are classified into biconvex, plano-convex, and concave-convex (or positive meniscus) types.

[0054] A negative lens, also known as a diverging lens or concave lens, has the effect of diverging light. Concave lenses are classified into biconcave, plano-concave, and convex-concave types.

[0055] The optical axis refers to the axis of symmetry of an optical system. For example, the optical axis of an optical lens is the axis that passes through the center of each optical element of the optical lens. The optical axis also refers to the center line of a light beam (light column). The optical properties of the light beam do not change when it rotates around this axis.

[0056] Focal length is a measure of the convergence or divergence of light in an optical system. Focal length is divided into image-side focal length and object-side focal length. Image-side focal length is the distance from the image-side principal plane to the image-side focal point; similarly, object-side focal length is the distance from the object-side principal plane to the object-side focal point. In the embodiments of this application, the focal length, effective focal length (EFL), and combined focal length all refer to image-side focal length.

[0057] Effective focal length, such as Figure 1a As shown, this refers to the distance from the image-side principal plane to the image-side focal point of the optical system.

[0058] The principal plane of an optical system, also known as the principal plane, includes the image-side principal plane and the object-side principal plane. When parallel light shines on the optical system, it is refracted and passes through the focal point on the image side. After refraction, the light rays are extended backward and intersect the incident light rays at a point. The plane perpendicular to the optical axis through this point is the image-side principal plane, and the point where the image-side principal plane intersects the optical axis of the optical system is the image-side principal point. Similarly, light emitted from the object-side focal point becomes parallel light after refraction. The extended incident light rays intersect the parallel light rays at a point, and the plane perpendicular to the optical axis through this point is the object-side principal plane. The point where the object-side principal plane intersects the optical axis of the optical system is the object-side principal point.

[0059] The position of the principal plane of an optical system can be determined using optical tracing methods. For example, by tracing light rays parallel to the optical axis in the paraxial region of the optical system, the position and focal length of the principal plane in that region can be calculated. Figure 1a As shown, AB is an incident ray parallel to the optical axis. After passing through the optical system, the outgoing ray E'F' intersects the optical axis at F'. According to the imaging theory of ideal optical systems, F' is the image point of the object point on the infinity axis, called the image-side focal point. If the incident ray AB and the outgoing ray E'F' are extended respectively, the two rays must intersect at a point, let this point be Q'. Draw a plane perpendicular to the optical axis through Q' that intersects the optical axis at point H'. Then H' is called the image-side principal point, the Q'H' plane is called the image-side principal plane, and the distance from the image-side principal plane Q'H' to the focal point F' is called the image-side focal length (also called the effective focal length).

[0060] like Figure 1b As shown, F is called the object-side focal point. Let the extension of the incident ray emitted from the focal point F intersect the extension of the corresponding outgoing ray parallel to the optical axis at point Q. Draw a plane perpendicular to the optical axis through point Q and intersect the optical axis at point H. Point H is called the object-side principal point of the optical system, and the QH plane is called the object-side principal plane. The distance between the object-side principal plane QH and the object-side focal point F is called the object-side focal length.

[0061] Object distance refers to the distance from the object plane to the object-side principal plane of the optical system, such as... Figure 1c As shown.

[0062] Image distance refers to the distance from the image plane to the principal plane of an optical system, such as... Figure 1c As shown.

[0063] Working distance is the distance from the front surface of the optical system (i.e., the surface closest to the object) to the object surface, such as... Figure 1c As shown.

[0064] The optical system mentioned above can be a single lens (or other optical element), a lens group formed by multiple lenses, or a system formed by multiple lens groups (such as an optical lens).

[0065] Focusing, specifically, refers to adjusting the position of the lens group (i.e., the focusing lens group) in the optical lens to control the image distance, so that the image plane of the optical lens falls on the photosensitive element, thereby making the image of the optical lens as clear as possible.

[0066] Focusing travel refers to the distance the focusing lens group moves during the focusing process of an optical lens. For example, when an optical lens switches from focusing on a distant scene to focusing on a close-up scene, the distance the focusing lens group moves along the optical axis is the focusing travel.

[0067] The image plane is located on the image side of all lenses in an optical lens, where light rays pass through each lens in sequence to form an image.

[0068] MTF (Modulation Transfer Function) is the ratio of contrast on the image plane to contrast on the object plane; that is, MTF represents the transfer of contrast. MTF = M / m; M = (Imax - Imin) / (Imax + Imin); where Imax is the maximum light intensity on the object plane and Imin is the minimum light intensity on the object plane; m = (imax - imin) / (imax + imin), where imax is the maximum light intensity on the image plane and imin is the minimum light intensity on the image plane. MTF is a quantitative description of the sharpness of an optical lens, specifically a quantitative description of the sharpness of the image formed by the optical lens (including both resolution and sharpness). MTF values ​​satisfy 0 ≤ MTF ≤ 1.

[0069] An aperture stop is a physical object in an optical system that limits the beam of light. An aperture stop can be the edge of a lens, a frame, or a specially designed perforated screen. The function of an aperture stop can be twofold: to limit the beam of light or to limit the size of the field of view (imaging range). The aperture stop that limits the beam of light the most in an optical system is called the aperture stop, and the aperture stop that limits the field of view (size) the most is called the field stop.

[0070] The pupil is the image of the aperture stop. The conjugate image of the aperture stop through the optical system in front of the aperture stop is called the entrance pupil, or simply the entrance pupil. The diameter of the entrance pupil is the same as the diameter of the entrance pupil.

[0071] Relative aperture is the ratio of the entrance pupil diameter D to the image-side focal length. f The ratio of ˊ is denoted as RA, that is, RA = D / f ˊ.

[0072] The F-number (Fno or F / #) is the reciprocal of the relative aperture, i.e., F = f The smaller the F-number, the larger the aperture and the shallower the depth of field; conversely, the larger the F-number, the smaller the aperture and the greater the depth of field.

[0073] Total track length (TTL) refers to the total length from the surface of the optical lens closest to the object side to the image plane.

[0074] ImgH (Image Height) represents half the diagonal length of the effective photosensitive area on the image sensor, also known as the image height.

[0075] The Abbe number, also known as the dispersion coefficient, is the ratio of the differences in the refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material. The Abbe number formula is: v = (n_d - 1) / (n_F - n_C), where n_d, n_F, and n_C are the refractive indices of the material for sodium light (d-line, wavelength 587.6 nm), blue light (F-line, 486.1 nm), and red light (C-line, 656.3 nm), respectively. The numerator (n_d - 1) in the Abbe number formula reflects the material's "overall refractive power" (related to optical power); the denominator (n_F - n_C) reflects the material's "difference in refractive index for blue and red light" (i.e., the degree of dispersion). Therefore, a larger Abbe number v indicates a weaker dispersion ability (a smaller denominator indicates a smaller difference in refractive index between different wavelengths); conversely, a smaller Abbe number v indicates a stronger dispersion ability.

[0076] Aberration is the deviation between the image formed by an uncorrected optical system and the image formed by an ideal optical system. Aberrations include spherical aberration, coma, field curvature, astigmatism, distortion, and chromatic aberration.

[0077] Spherical aberration is a wide beam aberration. When a concentric beam of light emitted from an on-axis point passes through an optical system, it is no longer concentric. Light rays at different incident heights intersect the optical axis at different positions after passing through the system, resulting in varying degrees of deviation from the paraxial image point (ideal image point). This deviation is called axial spherical aberration, or simply spherical aberration. Due to spherical aberration, the image point on the Gaussian image plane is no longer a point, but a circular spot of confusion. The radius of this spot of confusion is called transverse spherical aberration.

[0078] Coma is an aberration of wide beams at off-axis points. In an optical system with coma, the image point formed by an off-axis object point on the ideal image plane resembles a comet-shaped spot. The narrow beams close to the principal ray intersect the principal ray to form a bright spot, while the image points formed by beams of different apertures far from the principal ray are different rings far from the principal ray. Therefore, this imaging defect is called coma.

[0079] Chromatic aberration (CA) occurs when optical materials have different refractive indices for different wavelengths of light. Therefore, light rays of different colors passing through the same aperture intersect the optical axis at different points. Similarly, light rays of different colors passing through different apertures also intersect the optical axis at different points. This results in the image of an object point appearing as a colored diffuse spot at any position on the image plane. The difference in the imaging position and size between various colors of light is called chromatic aberration. There are two types of chromatic aberration: axial chromatic aberration and transverse chromatic aberration.

[0080] Axial chromatic aberration: The difference in the imaging position of two colors of light at a point on the axis is called positional chromatic aberration, also known as axial chromatic aberration.

[0081] Transverse chromatic aberration: The same medium has different refractive indices for different colors of light. Therefore, for off-axis object points, the transverse magnification of different colors of light is not equal. This difference is called transverse chromatic aberration, also known as magnification chromatic aberration.

[0082] Distortion, also known as distortion, is the difference between the height of the intersection point between the principal ray of different fields of view and the Gaussian image plane after passing through the optical lens and the ideal image height.

[0083] Field curvature is used to describe the difference along the optical axis between the position of the sharpest image point after rays from the off-center field of view pass through the optical lens group and the position of the sharpest image point in the central field of view. When field curvature exists, image points beyond the paraxial region on the Gaussian plane become blurred, and the image of a planar object becomes a curved surface of rotation, and a perfect image of the object plane cannot be obtained at the image plane.

[0084] Astigmatism is the axial distance between the meridional and sagittal image points of a narrow beam of light that do not coincide.

[0085] The meridional plane is the plane formed by the principal ray emitted from an object point outside the principal axis of an optical system and the principal axis of the optical system. Rays lying within the meridional plane are collectively called meridional beams. The point formed by a meridional beam is called a meridional image point. The image plane containing the meridional image point is called the meridional image plane.

[0086] The sagittal plane is a plane passing through the principal ray emitted from an object point located outside the principal axis of the optical system and perpendicular to the meridional plane. Rays lying within the sagittal plane are collectively called sagittal beams. The point formed by the sagittal beam is called the sagittal image point. The image plane containing the sagittal image point is called the sagittal image plane.

[0087] Currently, camera modules have become an indispensable key component in various electronic devices such as mobile phones and tablets. Through camera modules, people can easily capture wonderful moments, satisfying diverse photography needs such as daily life, work recording, and social sharing. A camera module mainly consists of an optical lens and a photosensitive element. Its working principle is as follows: light, after being focused by the optical lens, shines onto the photosensitive element. The photosensitive element converts the light signal into an electrical signal, which is then processed by an image signal processor. Finally, the processed digital image signal is output to the display screen or storage device of the electronic device, forming the photos or videos we see.

[0088] With the development of electronic technology, users' demands for image quality are constantly increasing. Telephoto lenses, capable of capturing distant objects clearly, have become a core function of mid-to-high-end electronic devices. However, traditional telephoto lenses need to extend along the thickness of electronic devices, contradicting the design trend of "thinner and lighter" devices. Periscope lenses, through the light-path redirection effect of prism components, can fold the light path inside the device, achieving telephoto imaging within a limited body thickness. This effectively resolves the technical conflict between "telephoto" and "thinner and lighter," and has therefore quickly become the mainstream choice for optical lenses in electronic devices.

[0089] To ensure the image quality of periscope lenses when electronic devices experience shaking (such as minor tremors during handheld shooting), image stabilization design of periscope lenses has become an important topic in the industry.

[0090] Figure 1d This is a structural diagram of a camera module in related technologies, such as... Figure 1d As shown, the camera module includes an optical lens 100 and a photosensitive element 200. The optical lens 100 is a periscope optical lens and includes a front lens group G0 and a rear lens group G10 disposed on the image side of the front lens group G0.

[0091] The front lens group G0 includes a reflecting prism 1, a positive lens disposed on the object side of the reflecting prism 1, and a negative lens disposed on the image side of the reflecting prism 1. The incident surface 11 of the reflecting prism 1 is disposed facing the positive lens on its object side, and the exit surface 12 of the reflecting prism 1 is disposed facing the negative lens on its image side. The reflecting surface 13 of the reflecting prism 1 is used to reflect the light passing through the positive lens and the incident surface 11 to the exit surface 12, and then direct the light from the exit surface 13 to the rear lens group G10.

[0092] The front lens group G0 is a stabilizing lens group. When the electronic device shakes, the front lens group G0 can rotate around a certain rotation center axis (for example, the rotation center axis can be an axis that passes through point O1 and is perpendicular to the optical axis AX1 and optical axis AX2) to perform stabilization.

[0093] However, during image stabilization, as the front lens group G0 rotates around a certain rotation center axis, the front lens group G0 will tilt, changing the propagation path of light in the front lens group G0 and the rear lens group G10. This results in a significant increase in chromatic aberration in the image received by the image sensor 200, which is detrimental to improving the image quality of the optical lens 100 during image stabilization.

[0094] Therefore, this application provides an optical lens, a camera module, and an electronic device, by setting the chromatic aberration coefficient C0 of the front lens group (i.e., the image stabilization lens group) to C0≤1.0×10 -3This configuration reduces the contribution of the front lens group to the chromatic aberration of the optical lens. In different image stabilization modes (such as image stabilization around different rotation axes), the front lens group can minimize the chromatic aberration of the optical lens. This not only improves the image quality of the optical lens during image stabilization but also greatly reduces the design difficulty of chromatic aberration correction of the rear lens group, thereby reducing the design cost of the optical lens.

[0095] The electronic devices in this application embodiment can be mobile phones, tablets, laptops, wearable devices (such as smartwatches), or other electronic devices with camera modules. The following uses a mobile phone as an example to specifically describe the electronic devices in this application embodiment. Other types of electronic devices can be set up with reference to the structure of the mobile phone embodiment, and will not be described in detail here.

[0096] Figure 2a This is a schematic diagram of the back of an electronic device (mobile phone) in some embodiments of this application. Figure 2b for Figure 2a A cross-sectional view of the electronic device in the diagram. Figure 2b The image shows the installation location of the camera module 400 in the electronic device, but its specific installation structure is not shown.

[0097] like Figure 2a and Figure 2b As shown, the electronic device includes a housing 500, a display screen 600, and a camera module 400, both of which are mounted on the housing 500.

[0098] The display screen 620 can be a liquid crystal display screen, an OLED (Organic Light-Emitting Diode) display screen, a QLED (Quantum Dot Light-Emitting Diode) display screen, a Micro LED display screen, an electronic ink display screen, etc., without any specific limitations.

[0099] In some embodiments, such as Figure 2a and Figure 2b As shown, the housing 500 includes a middle frame 510 (also called a front shell or front frame) and a rear cover 520 (also called a battery cover). The display screen 600 and the rear cover 520 are spaced apart along the thickness direction Z of the electronic device, and the middle frame 510 is connected between the display screen 600 and the rear cover 520.

[0100] The mid-frame 510 includes a bottom wall 511 and a side wall 512 disposed at the edge of the bottom wall 511. The edge of the display screen 600 is connected to the side wall 512, for example, by bonding. The display screen 600, the bottom wall 511, and the side wall 512 form a first receiving space 530, within which accessories 700 of the display screen 600 are disposed. For example, when the display screen 600 is an LCD display, the accessory 700 may be a backlight; or, when the display screen 600 is an OLED display, the accessory 700 may be a support film, a heat dissipation film, etc.

[0101] The edge of the back cover 520 is connected to the side wall 512 of the middle frame, for example, by snapping. The back cover 520, the bottom wall 511 of the middle frame, and the side wall 512 of the middle frame form a second receiving space 540, which is used to set up the camera module 400.

[0102] Of course, besides being installed in the second receiving space 540, the camera module 400 can also be installed in the first receiving space 530 to serve as a front-facing camera module for electronic devices. The mid-frame 510 is also not limited to... Figure 2b The structure shown can also be configured as other structures according to the actual situation, such as the middle frame 510 may not include the bottom wall 511.

[0103] like Figure 2b As shown, the camera module 400 includes an optical lens 100 and a photosensitive element 200. The photosensitive element 200 is located on the image side of the optical lens 100, and the light-inlet end of the optical lens 100 is positioned opposite to the camera window 521 on the rear cover 520.

[0104] The optical lens 100 is used for focusing and imaging; the photosensitive element 200 (also known as an image sensor) is used to convert light signals into electrical signals. The photosensitive element 200 can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor device (CMOS), and no specific limitation is made here.

[0105] The working principle of the camera module 400 is as follows: the light of the subject enters the optical lens 100 through the camera window 521, forming a clear image on the focal plane of the optical lens 100, and the image of the subject is recorded by the photosensitive element 200 located at the focal plane. The photosensitive element 200 converts the optical image into an electrical signal and transmits it to the processor of the electronic device. The processor transmits the electrical signal to the display screen 600 to display the image of the subject on the display screen 600.

[0106] In some embodiments, such as Figure 2b As shown, the camera module 400 also includes a filter 300, located between the optical lens 100 and the photosensitive element 200. The filter 300 is used to filter out unwanted wavelengths of light, preventing the photosensitive element 200 from producing false colors or ripples, thereby improving its effective resolution and color reproduction. For example, as... Figure 2b As shown, filter 300 can be an infrared filter.

[0107] Of course, the filter 300 is not limited to being placed between the optical lens 100 and the photosensitive element 200. The filter 300 can also be attached to the surface of one of the lenses or prisms of the optical lens 100 to achieve filtering.

[0108] Figure 3 This is a schematic diagram of the camera module 400 in the first embodiment of this application. Figure 3 As shown, the optical lens 100 includes a front lens group G0 and a rear lens group G10 located on the image side of the front lens group G0.

[0109] The front lens group G0 is a prism assembly with positive optical power. The front lens group G0 includes a main body 101 and an incident light side located on the main body 101 (e.g., Figure 3 The first refractive part 102 on the upper side of the main body 101, and the light-emitting side of the main body 101 (e.g., the light-emitting part 102 on the upper side of the main body 101) Figure 3 The second refractive part L0b is located on the right side of the main body 101. The main body 101 is used to reflect the light passing through the first refractive part 102 to the second refractive part L0b, and then direct the light from the second refractive part L0b to the rear lens group G10.

[0110] The first refractive part 102 is in close contact with the main body 101, and the second refractive part L0b is in close contact with the main body 101. The first refractive part 102 and the main body 101 are made of the same material. The first refractive part 102 and the main body 101 together constitute an equivalent lens L0a with positive optical power, and the second refractive part L0b has negative optical power.

[0111] "Close-fitting" refers to the seamless bonding of independent components through processes such as gluing and bonding, resulting in a gapless connection between the components. For example... Figure 3 As shown, the first refractive part 102, the second refractive part L0b and the main body part 101 are closely connected by adhesive bonding, and there is a splicing interface (i.e. adhesive surface) between the first refractive part 102, the second refractive part L0b and the main body part 101.

[0112] In some embodiments, such as Figure 3 As shown, the main body 101 includes a reflecting prism 1; the first refractive part 102 and the second refractive part L0b are both lenses. The image-side surface of the first refractive part 102 (e.g., Figure 3The lower surface of the first refractive section 102 (shown) is in close contact with the incident surface 11 of the reflecting prism 1. The object-side surface of the second refractive section L0b (e.g., Figure 3 The left surface of the second refractive part L0b shown is in close contact with the exit surface 12 of the reflecting prism 1.

[0113] By separately arranging the main body 101, the first refractive part 102, and the second refractive part L0b and then combining them, the number of optical surfaces in the front lens group G0 can be increased, which is beneficial for increasing the degrees of freedom in aberration correction and thus for correcting the overall aberrations generated by the front lens group G0. The main body 101, the first refractive part 102, and the second refractive part L0b are joined in a close manner, which is beneficial for correcting aberrations such as chromatic aberration, spherical aberration, coma, and astigmatism of the front lens group G0, thereby improving the imaging quality of the optical lens 100.

[0114] In some embodiments, such as Figure 3 As shown, the reflecting surface 13 of the reflecting prism 1 is covered with a reflective layer. This increases the reflectivity of the reflecting prism 1.

[0115] In some embodiments, such as Figure 3 As shown, the reflecting prism 1 is a right-angle prism, the angle between the incident surface 11 and the exit surface 12 is a right angle, and the angle between the reflecting surface 13 and the optical axis AX1 of the first refraction part 102 is an acute angle, such as 45°.

[0116] In some embodiments, the material of the reflecting prism 1 may be glass or resin.

[0117] In some embodiments, the materials of the first refractive part 102 and the second refractive part LOb are either glass or a cyclic olefin copolymer. By setting the materials of the first refractive part 102 and the second refractive part LOb to materials with low water absorption (i.e., glass and cyclic olefin copolymer), it is possible to prevent the first refractive part 102 and the second refractive part LOb from absorbing water, which would cause optical surface deformation and optical path deviation, thereby helping to minimize the aberrations of the optical lens 100.

[0118] Of course, the first refractive part 102 and the main body 101 can be either closely connected or integrally formed: the first refractive part 102 and the main body 101; the second refractive part L0b and the main body 101 can be either closely connected or integrally formed. "Integral forming" means that multiple parts form a single entity, with no joints between the parts. For example, the integral forming of the first refractive part 102, the second refractive part L0b, and the main body 101 means that there are no joints between the three parts.

[0119] Figure 4 for Figure 3The diagram shows the structure of the front lens group G0 at one viewing angle. Figure 3 and Figure 4 As shown, the front lens group G0 is an image stabilization lens group and can rotate around at least one of the first axis 31, the second axis 32 and the third axis 33; wherein, the first axis 31 is parallel to the optical axis AX1 of the first refractive part 102, the second axis 32 is parallel to the optical axis AX2 of the second refractive part L0b, and the third axis 33 is perpendicular to both the first axis 31 and the second axis 32.

[0120] In some embodiments, such as Figure 4 As shown, the front lens group G0 can rotate around the first axis 31 (i.e., the front lens group G0 "shakes") for image stabilization, wherein the first axis 31 coincides with the optical axis AX1. With this configuration, the front lens group G0 swings around the first axis 31, which can compensate for the image drift caused by the shaking of the electronic device in the direction perpendicular to the first axis 31, so that the camera module 400 can still ensure image quality in a shaking environment.

[0121] In addition to coinciding with the optical axis AX1, the first axis 31 can also be located near the optical axis AX1, for example, the distance between the first axis 31 and the optical axis AX1 is within 1mm.

[0122] In some embodiments, such as Figure 4 As shown, the front lens group G0 can rotate around the second axis 32 (i.e., the front lens group G0 "tilts") for image stabilization, wherein the second axis 32 coincides with the optical axis AX2. With this configuration, the front lens group G0 oscillates around the second axis 32, compensating for image drift caused by shaking of the electronic device in a direction perpendicular to the second axis 32, thus ensuring image quality even in shaking environments.

[0123] In addition to coinciding with the optical axis AX2, the second axis 32 can also be located near the optical axis AX2, for example, the distance between the second axis 32 and the optical axis AX2 is within 1mm.

[0124] In some embodiments, such as Figure 4 As shown, the front lens group G0 can rotate around the third axis 33 (i.e., the front lens group G0 "nods") for image stabilization, wherein the third axis 33 passes through the intersection point O1 of the optical axes AX1 and AX2. With this configuration, the front lens group G0 oscillates around the third axis 33, compensating for image drift caused by shaking of the electronic device in a direction perpendicular to the third axis 33, thus ensuring image quality even in shaky environments.

[0125] In addition to passing through the intersection point O1 of optical axis AX1 and optical axis AX2, the third axis 33 can also be located near the intersection point O1, for example, the distance between the third axis 33 and the intersection point O1 is within 1mm.

[0126] To reduce the load on the drive motor of the front lens assembly G0 during image stabilization, in some embodiments, such as Figure 3 As shown, the density ρ of the main body 101 satisfies: ρ≤3.92g / cm³ 3 That is, the density ρ of reflecting prism 1. p ≤3.92g / cm 3 This design avoids making the front lens assembly G0 too heavy, thus reducing the load on the drive motor when the front lens assembly G0 is performing image stabilization, thereby reducing the energy consumption of the drive motor and improving the battery life of electronic devices.

[0127] To further reduce the load on the drive motor of the front lens group G0 during image stabilization, in some embodiments, such as Figure 3 As shown, the density ρ of the main body 101 satisfies: ρ≤3.2g / cm³ 3 That is, the density ρ of reflecting prism 1. p ≤3.2g / cm 3 .

[0128] The main body 101 is made of low-density materials, such as heavy flint glass, lanthanide optical glass, and resin.

[0129] The following example illustrates the relationship between the image stabilization movement of the front lens group G0 and the chromatic aberration of the optical lens 100, using the example of the front lens group G0 rotating around the third axis 33 for image stabilization.

[0130] Figure 5a for Figure 3 The optical path diagrams of the front lens group G0 when it rotates around the third axis 33 at different angles are shown. Figure 5a Figure (1) shows the optical path diagram of the front lens group G0 when it is not performing image stabilization (i.e., when it is not nodding). Figure 5a (2) shows the optical path diagram when the front lens group G0 rotates 0.5° around the third axis 33 (i.e., nods 0.5°). Figure 5a (3) shows the optical path diagram when the front lens group G0 rotates 5° around the third axis 33 (i.e., when it nods 5°).

[0131] from Figure 5aAs can be seen from the light trajectory, when the current lens group G0 rotates around the third axis 33 at a large angle, the convergence point of the front lens group G0 will deviate significantly from the convergence point corresponding to the motion without image stabilization. After the image is formed by the rear lens group G10, the overall aberration of the image received on the photosensitive element 200 is significantly larger.

[0132] Figure 5b for Figure 3 The axial chromatic aberration curve of optical lens 100 when the front lens group G0 is not under image stabilization. Figure 5c for Figure 3 The axial chromatic aberration curve of optical lens 100 when the front lens group G0 rotates 0.5° around the third axis 33. Figure 5d for Figure 3 The axial chromatic aberration curve of the optical lens 100 when the front lens group G0 rotates 5° around the third axis 33.

[0133] from Figure 5b , Figure 5c as well as Figure 5d It can be seen that when the front lens group G0 rotates around the third axis 33 at different angles for image stabilization, the larger the rotation angle, the greater the "contribution" of the front lens group G0 to the axial chromatic aberration, and the greater the axial chromatic aberration of the optical lens 100. It can be seen that the front lens group G0 (i.e. the image stabilization lens group) has a significant impact on the chromatic aberration of the optical lens 100. Therefore, it is necessary to design the front lens group G0 to eliminate chromatic aberration.

[0134] To reduce the contribution of the front lens group G0 to chromatic aberration, the chromatic aberration coefficient C0 of the front lens group G0 must satisfy: -1.0×10 -3 ≤C0= ≤1.0×10 -3 ; For example, the chromatic aberration coefficient C0 of the front lens group G0 can be 1.0 × 10⁻⁶. -3 1.0×10 -4 1.197×10 -4 1.2×10 -4 1.449×10 -4 1.5×10 -4 2.0×10 -4 2.1×10 -4 2.142×10 -4 2.5×10 -4 3.0×10 -4 3.266×10 -4 3.4×10 -4 4.0×10 -4 5.0×10 -4 6.0×10-4 7.0×10 -4 8.0×10 -4 9.0×10 -4 1.0×10 -5 2.0×10 -5 3.0×10 -5 3.586×10 -5 3.6×10 -5 4.0×10 -5 5.0×10 -5 6.0×10 -5 7.0×10 -5 8.0×10 -5 9.0×10 -5 -1.0×10 -3 -1.0×10 -4 -1.1×10 -4 -1.2×10 -4 -1.25×10 -4 -1.4×10 -4 -1.5×10 -4 -2.0×10 -4 -2.1×10 -4 -2.5×10 -4 -3.0×10 -4 -3.4×10 -4 -4.0×10 -4 -5.0×10 -4 -6.0×10 -4 -7.0×10 -4 -8.0×10 -4 -9.0×10 -4 -1.0×10 -5 -2.0×10 -5 -3.0×10 -5 -3.6×10 -5 -4.0×10 -5 -5.0×10 -5 -6.0×10 -5 -7.0×10 -5 -8.0×10 -5 -9.0×10 -5 wait.

[0135] in, The optical power of the equivalent lens L0a is... The optical power of the second refractive section L0b; v a v is the Abbe number of the equivalent lens L0a.b d0 is the Abbe number of the second refractive part L0b; d0 is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis to the object-side principal plane of the second refractive part L0b.

[0136] The following section elaborates on the chromatic aberration coefficient C0 of the front lens group G0 and... The derivation process of the relationship: Figure 6a for Figure 3 Schematic diagram illustrating the calculation principle of G0 achromatic correction in the center front lens group. (See diagram for example.) Figure 6a As shown, Figure 6a Chinese h a h b The projection heights h of the first auxiliary ray on the equivalent lens L0a and the second refractive part L0b are respectively. za h zb These are the projection heights of the second auxiliary ray on the equivalent lens L0a and the second refractive part L0b, respectively.

[0137] The essence of chromatic aberration is that different wavelengths of light have different refractive abilities due to material dispersion (difference in Abbe number), resulting in a shift in the focal point. We need to quantify the sum of the contributions of the equivalent lens L0a and the second refractive part L0b to the chromatic aberration of different wavelengths of light. Through calculation and derivation, the total contribution of the equivalent lens L0a and the second refractive part L0b to chromatic aberration satisfies the following relationship: Total contribution = ; The above formula middle The portion outside of this is defined as the color difference coefficient C0, that is: C0= ; After simplification, we get: C0 = .

[0138] The chromatic aberration coefficient C0 reflects the contribution of the front lens group G0 to the chromatic aberration. A larger C0 indicates a greater contribution of the front lens group G0 to the chromatic aberration of the optical lens 100, resulting in a greater chromatic aberration in the optical lens 100. Conversely, a smaller C0 indicates a smaller contribution of the front lens group G0 to the chromatic aberration of the optical lens 100, resulting in a smaller chromatic aberration in the optical lens 100. Therefore, to reduce the chromatic aberration of the optical lens 100, the chromatic aberration coefficient C0 of the front lens group G0 should be kept as small as possible.

[0139] In this embodiment of the application, the optical lens 100 has its chromatic aberration coefficient C0 of the front lens group G0 set to -1.0 × 10⁻⁶. -3 ≤C0≤1.0×10 -3The solution in this application controls the chromatic aberration coefficient C0 of the front lens group G0 to a smaller value, thereby reducing the contribution of the front lens group G0 to the chromatic aberration of the optical lens 100, thus reducing the chromatic aberration of the optical lens 100 and improving the imaging quality of the optical lens 100. The solution in this application controls the chromatic aberration coefficient C0 of the front lens group G0 by controlling parameters such as the optical power and Abbe number of the equivalent lens L0a and the second refractive part L0b in the front lens group G0, thereby reducing the contribution of the front lens group G0 to the chromatic aberration of the optical lens 100. This results in a smaller chromatic aberration generated by the front lens group G0 under different image stabilization modes (such as image stabilization by rotating around different axes). (If the chromatic aberration of the front lens group G0 is corrected solely by the structural design of the rear lens group G10, the chromatic aberration correction effect of the rear lens group G10 under different image stabilization modes is not good). This reduces the design difficulty of the chromatic aberration correction of the rear lens group G10, and thus helps to reduce the design cost of the optical lens 100.

[0140] In some embodiments, such as Figure 3 As shown, the chromatic aberration coefficient C0 of the front lens group G0 satisfies: -3.4 × 10⁻⁶ -4 ≤C0≤3.4×10 -4 This setting allows for a smaller chromatic aberration coefficient C0 of the front lens group G0, which further reduces the contribution of the front lens group G0 to the chromatic aberration of the optical lens 100, thereby further reducing the chromatic aberration of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0141] In some embodiments, such as Figure 3 As shown, the chromatic aberration coefficient C0 of the front lens group G0 satisfies: -2.5 × 10⁻⁶ -4 ≤C0≤2.5×10 -4 This setting allows for a smaller chromatic aberration coefficient C0 of the front lens group G0, which further reduces the contribution of the front lens group G0 to the chromatic aberration of the optical lens 100, thereby further reducing the chromatic aberration of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0142] In some embodiments, such as Figure 3 As shown, the chromatic aberration coefficient C0 of the front lens group G0 satisfies: -1.5 × 10⁻⁶ -4 ≤C0≤1.5×10 -4 This setting allows for a smaller chromatic aberration coefficient C0 of the front lens group G0, which further reduces the contribution of the front lens group G0 to the chromatic aberration of the optical lens 100, thereby further reducing the chromatic aberration of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0143] In some embodiments, such as Figure 3As shown, the chromatic aberration coefficient C0 of the front lens group G0 satisfies: -5.0 × 10⁻⁶ -5 ≤C0≤5.0×10 -5 This setting allows for a smaller chromatic aberration coefficient C0 of the front lens group G0, which further reduces the contribution of the front lens group G0 to the chromatic aberration of the optical lens 100, thereby further reducing the chromatic aberration of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0144] In some embodiments, such as Figure 3 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 0.64 ≤ f / f L0a ≤1.77, for example, f / f L0a It can be 0.947, 0.783, 0.904, 0.808, 0.864, 0.754, 0.837, 0.646, 1.381, 1.763, etc.

[0145] This setting can avoid f / f L0a If the value is too large or too small, assuming other parameters of the front lens group G0 are constant, and if f / f is too large or too small... L0a If it is too large, then the optical power of the equivalent lens L0a will be... If too large, the chromatic aberration contribution of the equivalent lens L0a will be... The larger the value, the less conducive it is to reducing the chromatic aberration coefficient C0, and consequently, the less conducive it is to reducing the chromatic aberration of the optical lens; if f / f L0a If it is too small, then the optical power of the equivalent lens L0a will be... Too small, the effective focal length f of the front lens group G0 g0 If the size is too large, it increases the overall optical length of the optical lens 100, which is detrimental to reducing the size of the optical lens 100, and consequently hinders the thinning and lightening of electronic devices. By using f / f... L0a Set to 0.64≤f / f L0a The value is ≤1.77, which not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0146] In some embodiments, such as Figure 3 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 0.74 ≤ f / f L0a ≤0.95. This setting not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0147] In some embodiments, such as Figure 3 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 0.74 ≤ f / f L0a ≤0.91. This setting not only helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0148] In some embodiments, such as Figure 3 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 0.74 ≤ f / f g0 ≤0.87. This setting not only helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0149] In some embodiments, such as Figure 3 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 12.6mm ≤ f L0a ≤98.6mm, 9.3mm≤f≤73mm.

[0150] Among them, f L0a Available sizes include 12.6mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, and 98.6mm.

[0151] f can be 9.3mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 73mm, etc.

[0152] By f L0a f is set to 12.6mm≤f L0a≤98.6mm, 9.3mm≤f≤73mm, this can avoid f / f L0a Too large or too small a value not only helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0153] In some embodiments, such as Figure 3 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 26mm ≤ f L0a ≤48mm; 20mm≤f≤47mm.

[0154] Among them, f L0a The diameter can be 30.589mm, 26.246mm, 33.765mm, 47.785mm, 26.219mm, etc.; f can be 28.953mm, 23.961mm, 23.721mm, 21.206mm, 29.17mm, 25.467mm, 40.000mm, 30.866mm, 46.217mm, 36.206mm, etc.

[0155] By f L0a f is set to 26mm≤f L0a ≤48mm, 20mm≤f≤47mm, this can avoid f / f L0a Too large or too small a value not only helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0156] In some embodiments, such as Figure 3 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 26mm ≤ f L0a ≤34mm; 20mm≤f≤30mm. This setting avoids f / f. L0a Too large or too small a value not only helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0157] In some embodiments, such as Figure 3 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 0.21 ≤ f / f g0 ≤0.52, for example, f / f g0It can be 0.509, 0.422, 0.466, 0.417, 0.44, 0.384, 0.300, 0.231, 0.293, 0.229, etc.

[0158] This setting can avoid f / f g0 Too large or too small, assuming other parameters of the optical lens remain unchanged, if f / f g0 If the focal length is too large, then the optical focal length of the front lens group G0 will be too large, and the effective focal length f of the front lens group G0 will be too small. g0 If the f / f value is too small, the contribution of the front lens group G0 to chromatic aberration will be greater. This will not only be detrimental to reducing the chromatic aberration of the optical lens 100, but also to reducing the MTF loss of the optical lens 100 during image stabilization, thereby improving the image quality of the optical lens 100. g0 If the focal length is too small, the optical focal length of the front lens group G0 will be too small, the refractive power of the front lens group G0 will be weak, and the effective focal length f of the front lens group G0 will be limited. g0 If the size is too large, it increases the overall length of the optical lens 100, which is detrimental to reducing the size of the optical lens 100, and consequently hinders the thinning and lightening of electronic devices. By using f / f... g0 Set to 0.21≤f / f g0 The value is ≤0.52, which not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also improves the imaging quality of the optical lens 100 during image stabilization. In addition, it can also avoid a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0159] In some embodiments, such as Figure 3 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 0.35 ≤ f / f g0 ≤0.52. This setting not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also improves the image quality of the optical lens 100 during image stabilization. In addition, it can also avoid a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0160] In some embodiments, such as Figure 3 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 0.35 ≤ f / f g0 ≤0.47. This setting not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0161] In some embodiments, such as Figure 3 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 0.35 ≤ f / f g0 ≤0.43. This setting not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0162] In some embodiments, such as Figure 3 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 26.5mm≤f g0 ≤208.6mm, 9.3mm≤f≤73mm.

[0163] Among them, f g0 Available sizes include 26.5mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, 135mm, 140mm, 145mm, 150mm, 155mm, 160mm, 165mm, 170mm, 175mm, 180mm, 185mm, 190mm, 195mm, 200mm, 205mm, and 208.6mm.

[0164] f can be 9.3mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 73mm, etc.

[0165] By f g0 f is set to 26.5mm≤f g0 ≤208.6mm, 9.3mm≤f≤73mm, this can avoid f / f g0 Too large or too small a value not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0166] In some embodiments, such as Figure 3 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 50mm≤f g0 ≤158mm; 20mm≤f≤47mm. For example, f g0 The diameter can be 56.834mm, 50.896mm, 66.258mm, 133.333mm, 157.953mm, etc.; f can be 28.953mm, 23.961mm, 23.721mm, 21.206mm, 29.17mm, 25.467mm, 40.000mm, 30.866mm, 46.217mm, 36.206mm, etc.

[0167] By f g0 f is set to 50mm≤f g0 ≤158mm; 20mm≤f≤47mm, this can avoid f / f g0 Too large or too small a value not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0168] In some embodiments, such as Figure 3 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 50mm≤f g0 ≤70mm; 20mm≤f≤30mm. This setting avoids f / f. g0 Too large or too small a value not only helps to reduce the chromatic aberration coefficient C0, thus making the chromatic aberration of the optical lens 100 smaller, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0169] In some embodiments, such as Figure 3 As shown, the refractive index n of the equivalent lens L0a a And Abbe number v a The refractive index n of the second refractive part L0b b And Abbe number v b Satisfy: n a ≠n b ;v a ≠v bIn other words, the equivalent lens L0a and the second refractive part L0b are made of different materials. Since materials with different refractive indices usually have different Abbe numbers and refractive indices, the difference in Abbe numbers and refractive indices between the equivalent lens L0a and the second refractive part L0b can be used to correct the chromatic aberration of the front lens group G0, thereby helping to reduce the chromatic aberration of the optical lens 100.

[0170] In some embodiments, such as Figure 3 As shown, the refractive index n of the equivalent lens L0a a And Abbe number v a The refractive index n of the second refractive part L0b b And Abbe number v b Satisfy: v a <v b ;n a >n b This configuration allows for the correction of chromatic aberration in the front lens group G0 by utilizing the difference in Abbe number and refractive index between the equivalent lens L0a and the second refractive part L0b, which are made of different materials. This helps to reduce chromatic aberration in the optical lens 100.

[0171] In some embodiments, such as Figure 3 As shown, the Abbe number v of the equivalent lens L0a a And Abbe number v a The Abbe number v of the second refractive part L0b b And Abbe number v b Satisfy: v a >v b ;n a <n b In other words: the Abbe number v of the equivalent lens L0a. a Setting it to a larger value will increase the Abbe number v of the second refractive part L0b. b Setting it to a smaller value will reduce the refractive index n of the equivalent lens L0a. a The refractive index n of the second refractive section L0b is set to a smaller value. b The value is set relatively high. Based on the Abbe number v of the equivalent lens L0a... a Refractive index n a The Abbe number v of the second refractive part L0b b Refractive index n b With the effective focal length f of the front lens group G0 g0 In this arrangement, the effective focal length f of the front lens group G0 can be maximized. g0 The larger value helps to reduce the chromatic aberration coefficient C0, which in turn helps to reduce the chromatic aberration of the optical lens 100.

[0172] Among them, the Abbe number v of the equivalent lens L0a a Refractive index n aThe Abbe number v of the second refractive part L0b b Refractive index n b With the effective focal length f of the front lens group G0 g0 The following relationships exist: When the refractive index n of the equivalent lens L0a a The Abbe number v decreases continuously. a As the focal length of the front lens group G0 increases, the effective focal length f... g0 As the refractive index n increases, the chromatic aberration coefficient C0 decreases. Therefore, when the front lens group G0 performs image stabilization, the chromatic aberration of the optical lens 100 is smaller; conversely, when the refractive index n of the equivalent lens L0a decreases... a The Abbe number v increases continuously. a As the focal length of the front lens group G0 decreases continuously, the effective focal length f... g0 As the coefficient of chromatic aberration (C0) decreases, the chromatic aberration coefficient (C0) increases. At this time, when the front lens group G0 performs image stabilization, the chromatic aberration of the optical lens 100 will be greater.

[0173] When the refractive index n of the second refractive part L0b b The Abbe number v increases continuously. b As the focal length of the front lens group G0 decreases continuously, the effective focal length f... g0 As the chromatic aberration coefficient C0 increases, the chromatic aberration of the optical lens 100 decreases. Conversely, when the front lens group G0 performs image stabilization, the chromatic aberration is smaller. b The Abbe number v decreases continuously. b As the focal length of the front lens group G0 increases, the effective focal length f... g0 As the coefficient of chromatic aberration (C0) decreases, the chromatic aberration coefficient (C0) increases. At this time, when the front lens group G0 performs image stabilization, the chromatic aberration of the optical lens 100 will be greater.

[0174] In some embodiments, such as Figure 3 As shown, the Abbe number v of the equivalent lens L0a a The Abbe number v of the second refractive part L0b b Satisfy: v a ≠v b Furthermore, 23≤v a ≤95, 23≤v b ≤95.

[0175] Among them, the Abbe number v of the equivalent lens L0a a The values ​​can be 23, 25, 30, 35, 39, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, etc. The Abbe number v of the second refractive part L0b. b It can be 23, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 71, 75, 80, 85, 90, 95, etc.

[0176] With this setup, the difference in Abbe number between the equivalent lens L0a and the second refractive part L0b, made of different materials, can be used to correct the chromatic aberration of the front lens group G0, thereby helping to reduce the chromatic aberration of the optical lens 100.

[0177] In some embodiments, such as Figure 3 As shown, the Abbe number v of the equivalent lens L0a a The Abbe number v of the second refractive part L0b b Satisfy: v a ≠v b Furthermore, 34≤v a ≤95, 25≤v b ≤71. For example, the Abbe number v of the equivalent lens L0a. a The Abbe number v of the second refractive part L0b can be 64.060, 81.549, 70.417, 34.989, etc. b The values ​​can be 31.610, 54.8, 31.708, 25.456, etc. With this setting, the difference in Abbe number between the equivalent lens L0a and the second refractive part L0b, which are made of different materials, can be used to correct the chromatic aberration of the front lens group G0, thereby helping to reduce the chromatic aberration of the optical lens 100.

[0178] In some embodiments, such as Figure 3 As shown, the Abbe number v of the equivalent lens L0a a The Abbe number v of the second refractive part L0b b Satisfy: v a ≠v b Furthermore, 34≤v a ≤83, 25≤v b ≤55. With this setting, the difference in Abbe number between the equivalent lens L0a and the second refractive part L0b, which are made of different materials, can be used to correct the chromatic aberration of the front lens group G0, thereby helping to reduce the chromatic aberration of the optical lens 100.

[0179] In some embodiments, such as Figure 3 As shown, the Abbe number v of the equivalent lens L0a a The Abbe number v of the second refractive part L0b b Satisfy: 63≤v a ≤83; 30≤v b ≤55. For example, the Abbe number v of the equivalent lens L0a. a The Abbe number v of the second refractive part L0b can be 64.060, 81.549, 70.417, etc. b It can be 31.610, 54.8, 31.708, etc. This setting will allow the Abbe number v of the equivalent lens L0a to be... a The Abbe number v of the second refractive part L0b is relatively large. bThe smaller focal length allows for a smaller effective focal length f of the front lens group G0. g0 The larger value helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100.

[0180] In some embodiments, such as Figure 3 As shown, the refractive index n of the equivalent lens L0a a The refractive index n of the second refractive part L0b b Satisfy: n a ≠n b Furthermore, 1.42 ≤ n a ≤1.84, 1.42≤n b ≤1.84.

[0181] Among them, the refractive index n of the equivalent lens L0a a The values ​​can be 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, 1.69, 1.70, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.80, 1.81, 1.82, 1.83, 1.84, etc.

[0182] The refractive index n of the second refractive section L0b b The values ​​can be 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, 1.69, 1.70, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.80, 1.81, 1.82, 1.83, 1.84, etc.

[0183] With this configuration, the chromatic aberration of the front lens group G0 can be corrected by utilizing the difference in refractive index between the equivalent lens L0a and the second refractive part L0b, which helps to reduce the chromatic aberration of the optical lens 100.

[0184] In some embodiments, such as Figure 3 As shown, the refractive index n of the equivalent lens L0a a The refractive index n of the second refractive part L0b b Satisfy: na ≠n b Furthermore, 1.42 ≤ n a ≤1.75, 1.56≤n b ≤1.81. For example, the refractive index n of the equivalent lens L0a. a The refractive index n of the second refractive part L0b can be 1.516, 1.497, 1.487, 1.749, etc. b The values ​​can be 1.689, 1.677, 1.805, etc. With this setting, the chromatic aberration of the front lens group G0 can be corrected by utilizing the difference in refractive index between the equivalent lens L0a and the second refractive part L0b, which helps to reduce the chromatic aberration of the optical lens 100.

[0185] In some embodiments, such as Figure 3 As shown, the refractive index n of the equivalent lens L0a a The refractive index n of the second refractive part L0b b Satisfy: n a ≠n b Furthermore, 1.42 ≤ n a ≤1.59, 1.56≤n b ≤1.75. With this setting, the chromatic aberration of the front lens group G0 can be corrected by utilizing the difference in refractive index between the equivalent lens L0a and the second refractive part L0b, which helps to reduce the chromatic aberration of the optical lens 100.

[0186] In some embodiments, such as Figure 3 As shown, the refractive index n of the equivalent lens L0a a The refractive index n of the second refractive part L0b b Satisfies: 1.48≤n a ≤1.53; 1.66≤n b ≤1.70. For example, the refractive index n of the equivalent lens L0a. a The refractive index n of the second refractive part L0b can be 1.516, 1.497, 1.487, etc. b It can be 1.689, 1.677, etc.

[0187] This configuration allows the refractive index n of the equivalent lens L0a to be... a The refractive index n of the second refractive part L0b is relatively small. b The larger focal length allows for a greater effective focal length f of the front lens group G0. g0 The larger value helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100.

[0188] In some embodiments, such as Figure 3As shown, at least part of the object-side surface of the equivalent lens L0a (i.e., the object-side surface of the first refractive section 102) is a convex surface St, which curves towards the object side of the equivalent lens L0a so that the optical power of the equivalent lens L0a is positive; for example Figure 3 As shown, the first refractive part 102 is a plano-convex lens, and the positive optical power of the equivalent lens L0a is provided by the convex surface St.

[0189] The image-side surface of the second refractive section L0b is at least partially concave Sa, and the concave Sa curves toward the object side of the second refractive section L0b so that the optical power of the second refractive section L0b is negative; for example Figure 3 As shown, the second refractive part L0b is a plano-concave lens, and the negative optical power of the second refractive part L0b is provided by the concave surface Sa.

[0190] With this setup, by controlling parameters such as the convex surface St, the concave surface Sa, and the radius of curvature, the optical power of the equivalent lens L0a and the second refractive part L0b can be controlled, and thus the magnitude of the chromatic aberration coefficient C0 can be controlled.

[0191] In some embodiments, such as Figure 3 As shown, the chromatic aberration coefficient C0 of the front lens group G0 and the Abbe number v of the equivalent lens L0a are... a and refractive index n a The Abbe number v of the second refractive part L0b b and refractive index n b The radius of curvature r of the convex surface St at the optical axis position of the optical lens 100 a The radius of curvature r of the concave surface Sa at the optical axis position of the optical lens 100 b The thickness d of the equivalent lens L0a on the optical axis of the optical lens 100 ap The thickness d of the second refractive part L0b at the optical axis position of the optical lens 100 b satisfy: -3.4×10 -4 ≤C0= ≤3.4×10 -4 .

[0192] This setup, through the appropriate setting of the Abbe number v a Refractive index n a Abbe number v b Refractive index n b radius of curvature r a radius of curvature r b Thickness d ap Thickness d b The value of the chromatic aberration coefficient C0 can be controlled, thereby controlling the chromatic aberration of the optical lens and preventing it from becoming excessive. Furthermore, by setting the chromatic aberration coefficient C0 to -3.4 × 10⁻⁶...-4 ≤C0≤3.4×10 -4 This allows for a smaller chromatic aberration coefficient C0 of the front lens group G0, which further reduces the contribution of the front lens group G0 to the chromatic aberration of the optical lens 100, thereby further reducing the chromatic aberration of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0193] What needs to be understood is: such as Figure 3 As shown, the radius of curvature r of the convex surface St at the optical axis position of the optical lens 100 is... a Specifically, the radius of curvature of the convex surface St at the optical axis AX1 position of the first refractive part 102. The radius of curvature r of the concave surface Sa at the optical axis position of the optical lens 100. b Specifically, it refers to the radius of curvature of the concave surface Sa at the position of the optical axis AX2 of the second refractive part L0b.

[0194] like Figure 3 As shown, the thickness d ap Specifically, it is the sum of the lengths of line segments O1O2 and O1O3, and the thickness d. b Specifically, the lengths of line segments O3 and O4 are: point O1 is the intersection of optical axes AX1 and AX2 on the reflecting surface 13; point O2 is the intersection of optical axis AX1 and the convex surface St of the first refractive part 102; point O3 is the intersection of optical axis AX2 and the exit surface 12 of the reflecting prism 1; and point O4 is the intersection of optical axis AX2 and the concave surface Sa of the second refractive part L0b.

[0195] The following section elaborates on the color difference coefficient C0 and... The derivation process of the relationship: Figure 6b for Figure 3 A simplified calculation model diagram of the front-center lens group G0. (See diagram below.) Figure 6b As shown, the front lens group G0 is decomposed into a combination of a plano-convex lens (i.e., the equivalent lens L0a) and a plano-concave lens (i.e., the second refractive part L0b).

[0196] like Figure 6b As shown, the optical power of a plano-convex lens is calculated as follows: φ L0a = (1) The principal plane H' of a plano-convex lens 0a The distance from the exit surface 13 of the reflecting prism 1 is: H' g0a = ; The optical power of a plano-concave lens is calculated as follows: φ L0b = (2) The object principal plane H of a plano-concave lens 0b The distance from the exit surface 13 of the reflecting prism 1 is: H g0b = ; The principal plane H' of the image side of the plano-convex lens 0a With the object principal plane H of the plano-concave lens 0b The distance between them is: d0= (3) According to the optical power calculation method for combined systems, the optical power of the front lens group G0 is: φ g0 = ; Since C0= (4) Substituting the above relations (1), (2), and (3) into (4) and rearranging, we get: C0= .

[0197] In some embodiments, such as Figure 3 and Figure 6b As shown, the radius of curvature r of the convex surface St at the optical axis position of the optical lens 100 is... a satisfy: 9.5mm≤r a ≤155mm. Wherein, the radius of curvature r of the convex surface St. a Available sizes include 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, 135mm, 140mm, 145mm, 150mm, and 155mm.

[0198] This setting avoids the curvature radius r of the convex surface St. a If the radius of curvature r is too large or too small, a If it is too small, then the optical power of the equivalent lens L0a will be... If the radius of curvature r is too large, it will hinder the reduction of the chromatic aberration coefficient C0, and consequently, the reduction of the chromatic aberration of the optical lens 100; if the radius of curvature r aIf it is too large, then the optical power of the equivalent lens L0a will be... Too small, the effective focal length f of the front lens group G0 g0 If the radius of curvature is too large, it increases the overall optical length of the optical lens 100, which is detrimental to reducing the size of the optical lens 100 and consequently hinders the thinning and lightening of electronic devices. By adjusting the radius of curvature r... a Set to: 9.5mm≤r a ≤155mm, which not only helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100, but also avoids a large total optical length of the optical lens 100, which helps to reduce the size of the optical lens 100.

[0199] In some embodiments, such as Figure 3 and Figure 6b As shown, the radius of curvature r of the convex surface St at the optical axis position of the optical lens 100 is... a satisfy: 12.9mm≤r a ≤37mm. For example, the radius of curvature r of a convex surface St. a It can be 15.839mm, 13.064mm, 16.482mm, 36.000mm, 19.753mm, etc.

[0200] This setting avoids the curvature radius r of the convex surface St. a The value is neither too large nor too small. This not only helps to reduce the chromatic aberration coefficient C0, thereby reducing the chromatic aberration of the optical lens 100, but also avoids a large total optical length of the optical lens 100, which is conducive to further reducing the size of the optical lens 100.

[0201] In some embodiments, such as Figure 3 and Figure 6b As shown, at least one of the convex surface St and the concave surface Sa is aspherical. By setting at least one of the convex surface St and the concave surface Sa to be aspherical, the spherical aberration and other aberrations of the optical lens 100 can be better corrected. The rear lens group G10 does not need to design more lenses to correct the spherical aberration and other aberrations of the optical lens 100, which helps to shorten the overall length of the optical lens 100 and thus helps to reduce the size of the optical lens 100.

[0202] In some embodiments, such as Figure 3 and Figure 6b As shown, both the convex surface St and the concave surface Sa can be aspherical. By setting both the convex surface St and the concave surface Sa as aspherical, more aspherical surfaces can be used to correct aberrations such as spherical aberration of the optical lens 100. Therefore, the rear lens group G10 does not need to design more lenses to correct aberrations such as spherical aberration of the optical lens 100, which helps to shorten the overall length of the optical lens 100 and thus helps to reduce the size of the optical lens 100.

[0203] In some embodiments, both the convex surface St and the concave surface Sa can be spherical. This configuration reduces the manufacturing difficulty of the convex surface St and the concave surface Sa, thereby helping to reduce the manufacturing cost of the front lens group G0.

[0204] Of course, it is not limited to this. It can also be: the convex surface St is a spherical surface and the concave surface Sa is a non-spherical surface; or, the convex surface St is a non-spherical surface and the concave surface Sa is a spherical surface.

[0205] In some embodiments, such as Figure 3 and Figure 6b As shown, the thickness d of the first refractive part 102 at the optical axis position of the optical lens 100 is... a The thickness d of the second refractive part L0b at the optical axis position of the optical lens 100 b The thickness d of the main body 101 at the optical axis position of the optical lens 100 p satisfy: 1.8mm≤d a ≤2.8mm; 0.54mm≤d b ≤1.06mm; 7.7mm≤d p ≤12.8mm. For example, d a It can be 2.119mm, 1.917mm, 2.394mm, 2.100mm, 2.766mm, etc., d b It can be 0.892mm, 1.015mm, 1.040mm, 0.550mm, 0.635mm, etc., d p It can be 9.589mm, 7.849mm, 9.802mm, 11.000mm, 12.710mm, etc.

[0206] By d a d b d p Set to 1.8mm≤d a ≤2.8mm; 0.54mm≤d b ≤1.06mm; 7.7mm≤d p ≤12.8mm, which means d a d b d p The setting is relatively small, which allows the effective focal length f of the front lens group G0 to be maximized. g0 The larger the chromatic aberration coefficient C0, the smaller the chromatic aberration coefficient C0, which can reduce the chromatic aberration of the optical lens 100 and thus improve the imaging quality of the optical lens 100.

[0207] In some embodiments, such as Figure 3 and Figure 6bAs shown, the thickness d of the first refractive part 102 at the optical axis position of the optical lens 100 is... a The thickness d of the second refractive part L0b at the optical axis position of the optical lens 100 b The thickness d of the main body 101 at the optical axis position of the optical lens 100 p satisfy: 1.8mm≤d a ≤2.5mm; 0.89mm≤d b ≤1.06mm; 7.7mm≤d p ≤9.9mm.

[0208] This setting means that d a d b d p The setting is relatively small, which allows the effective focal length f of the front lens group G0 to be maximized. g0 The larger the chromatic aberration coefficient C0, the smaller the chromatic aberration coefficient C0, which can reduce the chromatic aberration of the optical lens 100 and thus improve the imaging quality of the optical lens 100.

[0209] It is important to understand that: such as Figure 3 As shown, the thickness d a Specifically, the length and thickness d of line segment O2O5. p Specifically, it is the sum of the lengths of line segments O5O1 and O1O3.

[0210] The above thickness d a Thickness d b Thickness d p With the effective focal length f of the front lens group G0 g0 The following relationships exist: Figure 6b As shown, when the thickness d a Thickness d b Thickness d p When the focal length is reduced, the effective focal length f of the front lens group G0 is... g0 As the thickness d increases, the chromatic aberration coefficient C0 decreases. At this time, when the front lens group G0 is performing image stabilization, the chromatic aberration of the optical lens 100 decreases; conversely, when the thickness d decreases... a Thickness d b Thickness d p When the focal length of the front lens group G0 increases, the effective focal length f... g0 As the chromatic aberration coefficient C0 decreases, the chromatic aberration of the optical lens 100 increases when the front lens group G0 is performing image stabilization.

[0211] Figure 7 for Figure 3 The diagram shows a focusing process of the optical lens 100 shown. Figure 7 Figure (a) shows the state diagram of the optical lens 100 when focusing on a distant scene (working distance is infinity). Figure 7 (b) shows the state diagram of the optical lens 100 when focusing on a close-up.

[0212] In some embodiments, such as Figure 7 As shown, the rear lens group G10 includes a first lens group G1 and a second lens group G2 located on the image side of the first lens group G1: the first lens group G1 has positive optical power, and the second lens group G2 has negative optical power. By setting the optical power of the first rear lens group G1 and the second rear lens group G2 in a positive and negative pair, some aberrations can be canceled out, thereby helping to reduce the aberrations of the optical lens 100 and ensuring the imaging quality of the optical lens 100.

[0213] In some embodiments, such as Figure 7 As shown, the first lens group G1 has four lenses along the object-to-image direction (e.g., Figure 7 From left to right, the four lenses are, in order, positive lens L11, negative lens L12, positive lens L13, and positive lens L14; the second lens group G2 has two lenses, in order, positive lens L21 and negative lens L22, along the direction from the object side to the image side.

[0214] By using a combination of positive and negative optical powers for the lenses in the first lens group G1 and the second lens group G1, some aberrations can be canceled out, which is beneficial for correcting the aberrations of the optical lens 100.

[0215] Of course, the number of lenses in the first lens group G1 is not limited to four; it can also be two, three, five, or six lenses, depending on the actual situation. Similarly, the number of lenses in the second lens group G2 is not limited to two; it can also be three, four, five, or six lenses, depending on the actual situation.

[0216] In some embodiments, such as Figure 7 As shown, the first lens group G1 is a focusing lens group, and it can move relative to the second lens group G2 along the optical axis AX2 of the first lens group G1, so that the optical lens 100 can focus on a distant object (e.g., Figure 7 (a) shown in the image) and the focus on the close-up (e.g.) Figure 7 Switching between (b) shown in the diagram. By setting the first lens group G1 as the focusing lens group, it is beneficial to increase the focusing stroke compression ratio ξ (see the definition below), thereby shortening the focusing stroke of the first lens group G1.

[0217] When the optical lens 100 switches from focusing on a distant scene to focusing on a close-up scene, the second lens group G2 moves away from the image plane along the optical axis AX2 (e.g., Figure 7The second lens group G2 moves along the optical axis AX2 in the direction closer to the image plane (as shown in the left direction); when the optical lens 100 switches from focusing on the near scene to focusing on the far scene, the second lens group G2 moves along the optical axis AX2 in the direction closer to the image plane (e.g., to the left). Figure 7 Move in the direction shown to the right.

[0218] In this context, "optical lens 100 focusing on distant scenery" means that the optical lens 100 can clearly image the subject at a first working distance, and "optical lens 100 focusing on close scenery" means that the optical lens 100 can clearly image the subject at a second working distance. The second working distance is smaller than the first working distance. The first working distance is the maximum working distance at which the optical lens 100 can clearly image, such as infinity; the second working distance is the minimum working distance at which the optical lens 100 can clearly image.

[0219] In some embodiments, such as Figure 7 As shown, the effective focal length f of the front lens group G0 g0 The combined focal length f of the front lens group G0 and the first lens group G1 g01 The effective focal length f of the optical lens, the first optical power allocation coefficient α, the second optical power allocation coefficient β, and the focusing stroke compression ratio ξ satisfy the following: 1.15≤ξ=(1-β 2 )α 2 ≤2.2; or, 1.15≤ξ=(1-β) 2 )α 2 ≤1.65; for example, ξ can be 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2.0, 2.05, 2.1, 2.15, 2.2, etc.

[0220] This configuration reduces the focusing distance of the first lens group G1, which helps to reduce the size of the drive motor of the first lens group G1; it also avoids the focusing distance of the first lens group G1 being too short, which reduces the accuracy requirements of the drive motor of the first lens group G1 and helps to reduce the manufacturing cost of the camera module 400.

[0221] In some embodiments, such as Figure 7 As shown, the effective focal length f of the front lens group G0 g0 The combined focal length f of the front lens group G0 and the first lens group G1 g01 The effective focal length f of the optical lens, the first optical power allocation coefficient α, the second optical power allocation coefficient β, and the focusing stroke compression ratio ξ satisfy the following: 1.15≤ξ=(1-β 2 )α 2≤1.56; for example, ξ can be 1.54, 1.169, 1.33, 1.346, 1.43, 1.175, etc.

[0222] Where α = f / f g01 ;β=f g01 / f g0 .

[0223] By setting the focusing stroke compression ratio ξ to 1.15≤ξ≤1.56, the focusing movement distance of the first lens group G1 can be reduced, which is beneficial to reducing the size of the drive motor of the first lens group G1; at the same time, the focusing movement distance of the first lens group G1 can be avoided to be too short, which reduces the accuracy requirements of the drive motor of the first lens group G1 and helps to reduce the manufacturing cost of the camera module 400.

[0224] The focusing stroke compression ratio ξ (also known as the focusing sensitivity parameter sens) is defined as: the focusing stroke of the entire optical lens 100 (excluding the pivot element) as the focusing lens group (or the amount of image plane movement of the optical lens 100 during focusing) divided by the focusing stroke of a specific lens group (such as the first lens group G1) within the optical lens 100 as the focusing lens group. A larger focusing stroke compression ratio ξ results in a smaller focusing stroke for the focusing lens group; conversely, a smaller focusing stroke compression ratio ξ results in a larger focusing stroke for the focusing lens group.

[0225] For a detailed description of the focusing stroke compression ratio ξ and the expression for the focusing stroke compression ratio ξ, please refer to the records in the applicant's earlier applications with patent application numbers 202410875013.7, 202311092486.1, and 202410023387.6.

[0226] In some embodiments, such as Figure 7 As shown in (a), when the optical lens 100 is focused on a distant scene, the focusing stroke compression ratio ξ satisfies: 1.32≤ξ≤1.56; for example, ξ can be 1.54, 1.33, 1.43, etc.

[0227] In some embodiments, such as Figure 7 As shown in (b), when the optical lens 100 is focusing on a close-up, the focusing stroke compression ratio ξ satisfies: 1.15≤ξ≤1.35; for example, ξ can be 1.169, 1.346, 1.175, etc.

[0228] In some embodiments, such as Figure 7 As shown, the first optical power allocation coefficient α satisfies: 1.1≤α≤1.52; for example, α can be 1.34, 1.16, 1.245, 1.146, 1.275, 1.15, etc.

[0229] From the relation ξ=(1-β)2 )α 2 Since the magnitude of α is positively correlated with ξ, by setting α to 1.1≤α≤1.52, we can avoid ξ being too large or too small. This can reduce the focusing movement distance of the first lens group G1, which is beneficial to reducing the size of the drive motor of the first lens group G1. It can also avoid the focusing movement distance of the first lens group G1 being too short, which reduces the accuracy requirements of the drive motor of the first lens group G1 and helps to reduce the manufacturing cost of the camera module 400.

[0230] In some embodiments, such as Figure 7 As shown in (a), when the optical lens 100 focuses on the distant scene, the first optical power allocation coefficient α satisfies: 1.23≤α≤1.52; for example, α can be 1.34, 1.245, 1.275, etc.

[0231] In some embodiments, such as Figure 7 As shown in (b), when the optical lens 100 is focused on a close-up, the first optical power allocation coefficient α satisfies: 1.10≤α≤1.23; for example, α can be 1.16, 1.146, 1.15, etc.

[0232] In some embodiments, such as Figure 7 As shown, the second optical power allocation coefficient β satisfies: 0.18≤β≤0.39; for example, β can be 0.380, 0.362, 0.374, 0.363, 0.345, 0.334, etc.

[0233] From the relation ξ=(1-β) 2 )α 2 Since the value of β is positively correlated with ξ, by setting β to 0.18≤β≤0.39, we can avoid ξ being too large or too small. This can reduce the focusing movement distance of the first lens group G1, which is beneficial to reducing the size of the drive motor of the first lens group G1. It can also avoid the focusing movement distance of the first lens group G1 being too short, which reduces the accuracy requirements of the drive motor of the first lens group G1 and helps to reduce the manufacturing cost of the camera module 400.

[0234] In some embodiments, such as Figure 7 As shown in (a), when the optical lens 100 is focused on a distant scene, the second optical power allocation coefficient β satisfies: 0.18≤β≤0.39; for example, β can be 0.380, 0.374, 0.345, etc.

[0235] In some embodiments, such as Figure 7 As shown in (b), when the optical lens 100 is focused on a close-up, the second optical power allocation coefficient β satisfies: 0.18≤β≤0.37; for example, β can be 0.362, 0.363, 0.334, etc.

[0236] Figure 8 for Figure 3 The diagram shows another focusing method of the optical lens 100 shown.

[0237] The focusing lens group in the optical lens 100 is not limited to the first lens group G1; in other embodiments, such as... Figure 8 As shown, the second lens group G2 is a focusing lens group, and it can move relative to the first lens group G1 along the optical axis AX2 of the second lens group G2, so that the optical lens 100 can focus on a distant object (such as...). Figure 8 (as shown in (a)) and the focus close-up (such as) Figure 8 Switch between (b) shown in the diagram.

[0238] When the optical lens 100 switches from focusing on a distant scene to focusing on a close-up scene, the second lens group G2 moves along the optical axis AX2 towards the image plane (e.g., Figure 8 The second lens group G2 moves along the optical axis AX2 in a direction away from the image plane (e.g., from center to right); when the optical lens 100 switches from focusing on the near scene to focusing on the far scene, the second lens group G2 moves away from the image plane along the optical axis AX2 (e.g., from center to right). Figure 8 Move from the center to the left.

[0239] The following section details the relationship between the first power distribution coefficient α and other parameters of the second lens group G2 during the focusing process.

[0240] like Figure 8 As shown, the optical lens 100 uses the movement of the second lens group G2 to achieve the focusing process. When the imaging object distance changes, the front lens group G0 and the first lens group G1 remain fixed, while the second lens group G2 is displaced relative to the first lens group G1, i.e., d 12 The distance between V2 and the object plane changes. Define the distance TOTR1 from the image plane m1 after the first lens group G1 images the object plane through the front lens group G0 to the front lens group G0: ; ; ; ; Let the front lens group G0 and the first lens group G1 be defined as the combined lens group G01. The combined lens group G01 is fixed in position, while the second lens group G2 moves to perform internal focusing. When the second lens group G2 moves, the distance d between the image-side principal plane of the combined lens group G01 and the object-side principal plane of the second lens group G2... 012 Image distance V 012 All of these changes, but the image plane position (IMA) remains unchanged.

[0241] ; ; The distance between the image principal plane of the first lens group G1 and the object principal plane of the second lens group G2 is d. 12 , ; Based on the image distance, the principal plane (H') of the combined lens group G01 is known to be... 01 Distance a from the first lens group G1 for: ; therefore: d 12 =

[0242] = ; Therefore: d 12 = ; The distance from the combined lens group G01 to the image plane IMA is defined as TOTR2, and is calculated as follows: ; ; in: , ; During the internal focusing process, G2 maintains the position of the image plane IMA unchanged, thus yielding the internal focusing differential equation as shown below: ; The general solution of the above internal focusing differential equation is as follows: ; When the object surface is at infinity, i.e., the object distance...

[0243] ; Particular solution of the internal focal differential equation: ; therefore: ; The equation is as follows: ; ; ; therefore: ; ; therefore: ; make: ; but: ; The equation concerning α can be derived as follows: ; Solve the above equation: ; .

[0244] Figure 9 This is a schematic diagram of the camera module 400 in the second embodiment of this application. Figure 9 The optical lens 100 shown is Figures 3-8 The main difference of the optical lens 100 shown is: Figure 9 The optical lens 100 in Figures 3-8 An optical path deflection element 2 is added to the optical lens 100 shown, as described below: like Figure 9 As shown, the optical lens 100 also includes an optical path deflection element 2, which is disposed on the image side of the rear lens group G10.

[0245] The light path deflection element 2 is a prism. The incident surface 21 of the light path deflection element 2 is set towards the side where the rear lens group G10 is located, and the exit surface 22 of the light path deflection element 2 is set towards the side where the image plane of the optical lens 100 is located. The reflecting surface 23 of the light path deflection element 2 is used to reflect the light passing through the rear lens group G10 and the incident surface 21 of the light path deflection element 2 to the exit surface 22 of the light path deflection element 2 and then emit it.

[0246] By setting the optical path deflection element 2, the optical path of the optical lens 100 can be folded to reduce the size of the optical lens 100 along the optical axis AX2, thereby reducing the space occupied by the optical lens 100 inside the electronic device.

[0247] In some embodiments, such as Figure 9 As shown, the optical path deflection element 2 is a right-angle prism. The angle between the incident surface 21 and the exit surface 22 of the optical path deflection element 2 is a right angle, and the angle between the reflecting surface 23 and the optical axis AX2 of the optical path deflection element 2 is an acute angle, such as 45°.

[0248] Of course, the optical path deflection element 2 can be a prism or a mirror.

[0249] For details regarding the other structures and optical parameter settings of the camera module 400 in this embodiment, please refer to [link / reference needed]. Figures 3-8 The camera module 400 shown is configured as described above, and will not be described in detail here.

[0250] Figure 10 This is a schematic diagram of the camera module 400 in the third embodiment of this application. Figure 10 The optical lens 100 shown is Figures 3-8 The main difference between the optical lenses 100 shown is that the structure of the front lens group G0 is different. Figure 10 The first refractive portion 102 of the front lens group G0 is integrally formed with the main body portion 101, as described below: In some embodiments, such as Figure 10 As shown, the front lens group G0 includes a reflecting prism 1, which is integrally formed. The first refractive part 102 and the main body part 101 are each part of the reflecting prism 1, that is, the first refractive part 102 and the main body part 101 are integrally formed.

[0251] The main body 101 includes the reflecting surface 13 of the reflecting prism 1; the first refractive part 102 includes the incident surface 11 of the reflecting prism 1; the second refractive part L0b is a lens, and the object-side surface of the second refractive part L0b is in close contact with the exit surface 12 of the reflecting prism 1.

[0252] For example Figure 10 As shown, the main body 101 can be the part defined by triangles a1a2a3 in the reflecting prism 1, where a1 is the upper end point of the reflecting surface 13 of the reflecting prism 1, a2 is the upper end point of the exiting surface 12 of the reflecting prism 1, a3 is the lower end point of the exiting surface 12 of the reflecting prism 1, and the first refraction part 102 is the part of the reflecting prism 1 located on the upper side of the main body 101.

[0253] By incorporating the first refractive part 102 and the main body 101 as part of the reflecting prism 1, the number of optical elements in the front lens group G0 can be reduced, thereby simplifying the assembly process of the front lens group G0 and improving the assembly efficiency of the optical lens 100. By joining the reflecting prism 1 and the second refractive part L0b in a close manner, the number of optical surfaces in the front lens group G0 can be increased, which increases the degree of freedom for aberration correction. This facilitates the correction of aberrations such as chromatic aberration, spherical aberration, coma, and astigmatism in the front lens group G0, thereby improving the imaging quality of the optical lens 100.

[0254] In some embodiments, such as Figure 10 As shown, the reflecting surface 13 of the reflecting prism 1 is covered with a reflective layer.

[0255] In some embodiments, such as Figure 10As shown, the reflecting prism 1 is a right-angle prism. The angle between the incident surface 11 and the exit surface 12 of the reflecting prism 1 is a right angle. The angle between the reflecting surface 13 of the reflecting prism 1 and the optical axis AX1 of the first refractive part 102 is an acute angle, such as 45°.

[0256] In some embodiments, the material of the reflecting prism 1 may be glass or resin.

[0257] In some embodiments, such as Figure 10 As shown, the chromatic aberration coefficient C0 of the front lens group G0 satisfies: -1.0 × 10⁻⁶ -3 ≤C0≤1.0×10 -3 Or, -3.4×10 -4 ≤C0≤3.4×10 -4 Or, -1.5×10 -4 ≤C0≤1.5×10 -4 Or, -2.5×10 -4 ≤C0≤2.5×10 -4 Or, -5.0×10 -5 ≤C0≤5.0×10 -5 .

[0258] In some embodiments, such as Figure 10 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 0.64 ≤ f / f L0a ≤1.77; or, 0.74≤f / f L0a ≤0.95, or 0.74≤f / f L0a ≤0.91, or 0.74≤f / f g0 ≤0.87.

[0259] In some embodiments, such as Figure 10 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 26mm ≤ f L0a ≤34mm, 20mm≤f≤30mm; or, 26mm≤f L0a ≤48mm, 20mm≤f≤47mm; or, 12.6mm≤f L0a ≤98.6mm, 9.3mm≤f≤73mm.

[0260] In some embodiments, such as Figure 10 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 0.21 ≤ f / f g0 ≤0.52; or, 0.35≤f / f g0≤0.52, or 0.35≤f / f g0 ≤0.47, or 0.35≤f / f g0 ≤0.43.

[0261] In some embodiments, such as Figure 10 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 50mm ≤ f g0 ≤70mm, 20mm≤f≤30mm; or, 50mm≤f g0 ≤158mm, 20mm≤f≤47mm; or, 26.5mm≤f g0 ≤208.6mm, 9.3mm≤f≤73mm.

[0262] In some embodiments, such as Figure 10 As shown, the refractive index n of the equivalent lens L0a a And Abbe number v a The refractive index n of the second refractive part L0b b And Abbe number v b Satisfy: n a ≠n b ;v a ≠v b .

[0263] In some embodiments, such as Figure 10 As shown, the Abbe number v of the equivalent lens L0a a The Abbe number v of the second refractive part L0b b The refractive index n of the equivalent lens L0a a The refractive index n of the second refractive part L0b b Satisfy: v a >v b n a <n b Or, v a <v b n a >n b .

[0264] In some embodiments, such as Figure 10 As shown, the Abbe number v of the equivalent lens L0a a The Abbe number v of the second refractive part L0b b Satisfy: 63≤v a ≤83, 30≤v b ≤55.

[0265] In some embodiments, such as Figure 10 As shown, the Abbe number v of the equivalent lens L0a aThe Abbe number v of the second refractive part L0b b Satisfy: v a ≠v b Furthermore, 34≤v a ≤83, 25≤v b ≤55; or, 34≤v a ≤95, 25≤v b ≤71; or, 23≤v a ≤95, 23≤v b ≤95.

[0266] In some embodiments, such as Figure 10 As shown, the refractive index n of the equivalent lens L0a a The refractive index n of the second refractive part L0b b Satisfies: 1.48≤n a ≤1.53, 1.66≤n b ≤1.70.

[0267] In some embodiments, such as Figure 10 As shown, the refractive index n of the equivalent lens L0a a The refractive index n of the second refractive part L0b b Satisfy: n a ≠n b Furthermore, 1.42 ≤ n a ≤1.75, 1.56≤n b ≤1.81; or, 1.42≤n a ≤1.59, 1.56≤n b ≤1.75; or, 1.42≤n a ≤1.84, 1.42≤n b ≤1.84.

[0268] In some embodiments, such as Figure 10 As shown, the object-side surface of the equivalent lens L0a (i.e., the incident surface 11 of the reflecting prism 1) is at least partially convex St, and the convex St curves toward the object side of the equivalent lens L0a so that the optical power of the equivalent lens L0a is positive. The image-side surface of the second refractive part L0b is at least partially concave Sa, and the concave Sa curves toward the object side of the second refractive part L0b so that the optical power of the second refractive part L0b is negative.

[0269] In some embodiments, as shown in 10, the radius of curvature r of the convex surface St at the optical axis position of the optical lens 100 a Satisfies: 12.9mm≤r a ≤37.0mm; or, 9.5mm≤r a ≤155mm.

[0270] In some embodiments, such as Figure 10 As shown, at least one of the convex surface St and the concave surface Sa is an aspherical surface.

[0271] In some embodiments, such as Figure 10 As shown, both the convex surface St and the concave surface Sa are aspherical. However, this is not the case; both the convex surface St and the concave surface Sa can also be spherical.

[0272] In some embodiments, such as Figure 10 As shown, the chromatic aberration coefficient C0 of the front lens group G0 and the Abbe number v of the equivalent lens L0a are... a and refractive index n a The Abbe number v of the second refractive part L0b b and refractive index n b The radius of curvature r of the convex surface St at the optical axis position of the optical lens 100 a The radius of curvature r of the concave surface Sa at the optical axis position of the optical lens 100 b The thickness d of the equivalent lens L0a on the optical axis of the optical lens 100 ap The thickness d of the second refractive part L0b at the optical axis position of the optical lens 100 b satisfy: -3.4×10 -4 ≤C0= ≤3.4×10 -4 .

[0273] In some embodiments, such as Figure 10 As shown, the thickness d of the first refractive part 102 at the optical axis position of the optical lens 100 is... a The thickness d of the second refractive part L0b at the optical axis position of the optical lens 100 b The thickness d of the main body 101 at the optical axis position of the optical lens 100 p satisfy: 1.8mm≤d a ≤2.5mm, 0.89mm≤d b ≤1.06mm, 7.7mm≤d p ≤9.9mm; Alternatively, 1.8mm≤d a ≤2.8mm, 0.54mm≤d b ≤1.06mm, 7.7mm≤d p ≤12.8mm.

[0274] Among them, such as Figure 10 As shown, the thickness d ap It is the sum of the lengths of line segments O1O2 and O1O3, and the thickness d b It is the length and thickness d of line segment O3O4. aIt is the length and thickness d of line segment O2O5. p It is the sum of the lengths of line segments O5O1 and O1O3. Point O1 is the intersection of optical axes AX1 and AX2 on the reflecting surface 13, point O2 is the intersection of optical axis AX1 and convex surface St, point O3 is the intersection of optical axis AX2 and the exit surface 12 of reflecting prism 1, and point O4 is the intersection of optical axis AX2 and concave surface Sa.

[0275] For details regarding the other structures and optical parameter settings of the camera module 400 in this embodiment, please refer to [link / reference]. Figures 3-8 The structure of the camera module 400 shown is configured as described above, and will not be elaborated further here.

[0276] Figure 11 This is a schematic diagram of the camera module 400 in the fourth embodiment of this application. Figure 11 The optical lens 100 shown is Figures 3-8 The main difference between the optical lenses 100 shown is that the structure of the front lens group G0 is different. Figure 11 The first refractive part 102 and the second refractive part L0b of the front lens group G0 are integrally formed with the main body 101, as described below: In some embodiments, such as Figure 11 As shown, the front lens group G0 includes a reflecting prism 1, which is integrally formed. The first refractive part 102, the second refractive part L0b, and the main body part 101 are each part of the reflecting prism 1; that is, the first refractive part 102, the second refractive part L0b, and the main body part 101 are integrally formed.

[0277] The main body 101 includes the reflecting surface 13 of the reflecting prism 1. The first refractive part 102 includes the incident surface 11 of the reflecting prism 1. The second refractive part 10b includes the exit surface 12 of the reflecting prism 1. For example Figure 11 As shown, the main body 101 can be the portion defined by triangles a1a2a3 in the reflecting prism 1, where a1 is the upper endpoint of the reflecting surface 13 of the reflecting prism 1, a3 is the lower endpoint of the exiting surface 12 of the reflecting prism 1, side a1a2 is perpendicular to the optical axis AX1, side a2a3 is perpendicular to the optical axis AX2, and a2 is the intersection of side a1a2 and side a2a3. The first refractive part 102 is the portion of the reflecting prism 1 located on the upper side of the main body 101, and the second refractive part L0b is the portion of the reflecting prism 1 located on the right side of the main body 101.

[0278] By setting the first refractive part 102, the second refractive part L0b, and the main body part 101 as part of the reflecting prism 1, the number of optical elements in the front lens group G0 can be reduced, thereby simplifying the assembly process of the front lens group G0 and improving the assembly efficiency of the optical lens 100.

[0279] In some embodiments, such as Figure 11 As shown, the reflecting surface 13 of the reflecting prism 1 is covered with a reflective layer.

[0280] In some embodiments, such as Figure 11 As shown, the reflecting prism 1 is a right-angle prism. The angle between the incident surface 11 and the exit surface 12 of the reflecting prism 1 is a right angle. The angle between the reflecting surface 13 of the reflecting prism 1 and the optical axis AX1 of the first refractive part 102 is an acute angle, such as 45°.

[0281] In some embodiments, the material of the reflecting prism 1 may be glass or resin.

[0282] In some embodiments, such as Figure 11 As shown, the chromatic aberration coefficient C0 of the front lens group G0 satisfies: -1.0 × 10⁻⁶ -3 ≤C0≤1.0×10 -3 Or, -3.4×10 -4 ≤C0≤3.4×10 -4 Or, -1.5×10 -4 ≤C0≤1.5×10 -4 Or, -2.5×10 -4 ≤C0≤2.5×10 -4 Or, -5.0×10 -5 ≤C0≤5.0×10 -5 .

[0283] In some embodiments, such as Figure 11 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 0.64 ≤ f / f L0a ≤1.77; or, 0.74≤f / f L0a ≤0.95, or 0.74≤f / f L0a ≤0.91, or 0.74≤f / f g0 ≤0.87.

[0284] In some embodiments, such as Figure 11 As shown, the effective focal length f of the equivalent lens L0a L0a The effective focal length f of the optical lens 100 satisfies: 26mm ≤ f L0a ≤34mm, 20mm≤f≤30mm; or, 26mm≤f L0a ≤48mm, 20mm≤f≤47mm; or, 12.6mm≤f L0a ≤98.6mm, 9.3mm≤f≤73mm.

[0285] In some embodiments, such as Figure 11 As shown, the effective focal length f of the front lens group G0g0 The effective focal length f of the optical lens 100 satisfies: 0.21 ≤ f / f g0 ≤0.52; or, 0.35≤f / f g0 ≤0.52, or 0.35≤f / f g0 ≤0.47, or 0.35≤f / f g0 ≤0.43.

[0286] In some embodiments, such as Figure 11 As shown, the effective focal length f of the front lens group G0 g0 The effective focal length f of the optical lens 100 satisfies: 50mm ≤ f g0 ≤70mm, 20mm≤f≤30mm; or, 50mm≤f g0 ≤158mm, 20mm≤f≤47mm; or, 26.5mm≤f g0 ≤208.6mm, 9.3mm≤f≤73mm.

[0287] In some embodiments, such as Figure 11 As shown, the object-side surface of the equivalent lens L0a (i.e., the incident surface 11 of the reflecting prism 1) is at least partially convex St, and the convex surface St bends toward the object side of the equivalent lens L0a so that the optical power of the equivalent lens L0a is positive. The image-side surface of the second refractive part L0b (i.e., the exit surface 12 of the reflecting prism 1) is at least partially concave Sa, and the concave surface Sa bends toward the object side of the second refractive part L0b so that the optical power of the second refractive part L0b is negative.

[0288] In some embodiments, as shown in 11, the radius of curvature r of the convex surface St at the optical axis position of the optical lens 100 a Satisfies: 12.9mm≤r a ≤37.0mm; or, 9.5mm≤r a ≤155mm.

[0289] In some embodiments, such as Figure 11 As shown, at least one of the convex surface St and the concave surface Sa is an aspherical surface.

[0290] In some embodiments, such as Figure 11 As shown, both the convex surface St and the concave surface Sa are aspherical. However, this is not the case; both the convex surface St and the concave surface Sa can also be spherical.

[0291] In some embodiments, such as Figure 11 As shown, the chromatic aberration coefficient C0 of the front lens group G0 and the Abbe number v of the equivalent lens L0a are... a and refractive index n a The Abbe number v of the second refractive part L0b b and refractive index nb The radius of curvature r of the convex surface St at the optical axis position of the optical lens 100 a The radius of curvature r of the concave surface Sa at the optical axis position of the optical lens 100 b The thickness d of the equivalent lens L0a on the optical axis of the optical lens 100 ap The thickness d of the second refractive part L0b at the optical axis position of the optical lens 100 b satisfy: -3.4×10 -4 ≤C0= ≤3.4×10 -4 .

[0292] In some embodiments, such as Figure 11 As shown, the thickness d of the first refractive part 102 at the optical axis position of the optical lens 100 is... a The thickness d of the second refractive part L0b at the optical axis position of the optical lens 100 b The thickness d of the main body 101 at the optical axis position of the optical lens 100 p satisfy: 1.8mm≤d a ≤2.5mm; 0.89mm≤d b ≤1.06mm; 7.7mm≤d p ≤9.9mm; Alternatively, 1.8mm≤d a ≤2.8mm, 0.54mm≤d b ≤1.06mm, 7.7mm≤d p ≤12.8mm.

[0293] Among them, such as Figure 11 As shown, the thickness d ap It is the sum of the lengths of line segments O1O2 and O1O3, and the thickness d b It is the length and thickness d of line segment O3O4. a It is the length and thickness d of line segment O2O5. p It is the sum of the lengths of line segments O5O1 and O1O3. Point O1 is the intersection of optical axes AX1 and AX2 on the reflecting surface 13, point O2 is the intersection of optical axis AX1 and convex surface St, point O3 is the intersection of optical axis AX2 and the exit surface 12 of reflecting prism 1, and point O4 is the intersection of optical axis AX2 and concave surface Sa.

[0294] For details regarding the other structures and optical parameter settings of the camera module 400 in this embodiment, please refer to [link / reference]. Figures 3-8 The structure of the camera module 400 shown is configured as described above, and will not be elaborated further here.

[0295] Figure 12aThis is an optical path diagram of the optical lens 100 of the camera module 400 during the focusing process in the fifth embodiment of this application, wherein, Figure 12a Figure (1) shows the state diagram of the optical lens 100 when focusing on a distant scene. Figure 12a (2) shows the state diagram of the optical lens 100 when focusing on a close-up.

[0296] Figure 12a The camera module 400 shown is Figures 3-8 The main difference between the camera module 400 shown is that the specific parameters of the camera module 400 are different, as detailed below:

[0297] like Figure 12a As shown, the first lens group G1 is a focusing lens group, and it can move relative to the second lens group G2 along the optical axis AX2 of the first lens group G1, so that the optical lens 100 can focus on a distant object (e.g., Figure 12a (1) shown in the image) and the focus on the close-up (e.g.) Figure 12a Switch between (2) shown in the middle.

[0298] The following section, in conjunction with a specific parameter table, discusses... Figure 12a The camera module 400 shown will be described in detail.

[0299] As shown in Tables 1.1 and 1.2, Table 1.1 shows the main parameters of the camera module 400 in the fifth embodiment of this application, and Table 1.2 shows the aspherical coefficients of each surface of the optical element in the camera module 400 in the fifth embodiment of this application.

[0300] Table 1.1 Main parameters of the camera module 400 in the fifth embodiment of this application

[0301] The units for the parameters of radius of curvature, thickness, and light transmission radius in Table 1.1 are all mm.

[0302] S0 represents the object surface, i.e. the scene being photographed; STO represents the aperture (STOP), which limits the size of the light-passing aperture and affects the amount of light entering the optical system. STO is located on the object-side surface of the first refractive part 102.

[0303] The first refractive part 102 and the reflecting prism 1 form an equivalent lens L0a; S1 represents the object-side surface of the first refractive part 102; S2 represents the image-side surface of the first refractive part 102; S3 represents the incident surface 11 of the reflecting prism 1; S4 represents the reflecting surface 13 of the reflecting prism 1; S5 represents the exit surface 12 of the reflecting prism 1; S6 represents the object-side surface of the second refractive part L0b; and S7 represents the image-side surface of the second refractive part L0b.

[0304] S8 represents the object-side surface of lens L11, S9 represents the image-side surface of lens L11; S10 represents the object-side surface of lens L12, S11 represents the image-side surface of lens L12; S12 represents the object-side surface of lens L13, S13 represents the image-side surface of lens L13, S14 represents the object-side surface of lens L14, and S15 represents the image-side surface of lens L14.

[0305] S16 represents the object-side surface of lens L21, S17 represents the image-side surface of lens L21; S18 represents the object-side surface of lens L22, and S19 represents the image-side surface of lens L22.

[0306] Filter represents filter 300, which is an infrared filter; S20 is the object-side surface of filter 300; S21 is the image-side surface of filter 300; S22 represents image plane IMA, which can be the photosensitive surface of photosensitive element 200.

[0307] In Table 1.1, the surface number S is in the "Thickness" parameter series. n The corresponding numerical value means surface number S n Surface to surface number S n+1 The distance of the surface along the optical axis; the rule for the sign of the thickness parameter is as follows: Starting with S... n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 The vertex of the surface is negative when it is on the right, positive when it is on the left, positive when it is at the bottom, and negative when it is at the top. Thickness (INF) represents the thickness of the optical lens 100 when focusing on a distant scene (i.e., working distance is infinity); Thickness (Macro) represents the thickness of the optical lens 100 when focusing on a close scene (i.e., working distance is macro).

[0308] The radii of curvature in Table 1.1 are the radii of curvature of the corresponding surface number at the optical axis; the rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. A value of left-hand center is positive, right-hand center is negative, bottom center is positive, and top center is negative. The radius of curvature of INFINITY indicates that the surface corresponding to this parameter is planar.

[0309] In some embodiments, the aspherical surfaces in the camera module 400 can be defined using the following aspherical curve equation: z ; Where z is the distance from the optical axis on the aspherical surface. r The relative distance between the point and the tangent plane at the intersection point on the aspherical optical axis; r is the perpendicular distance between the point on the aspherical curve and the optical axis; c K is the curvature; K is the cone coefficient; A iFor the i-th order aspherical coefficients, see Table 1.2 for details.

[0310] Table 1.2 Aspheric coefficients of various surfaces of the camera module 400 in the fifth embodiment of this application

[0311]

[0312] Table 1.3 Main parameters of the camera module 400 in the fifth embodiment of this application (II)

[0313] Table 1.4 Main parameters of the camera module 400 in the fifth embodiment of this application

[0314] Table 1.5 Main parameters of the camera module 400 in the fifth embodiment of this application

[0315] In Tables 1.3 to 1.5, "INF" indicates that the working distance of the subject is infinity; "Macro" indicates that the working distance of the subject is macro, such as 189.701mm. The data mE-n represents m × 10 n For example, 1.757E-02 represents 1.757 × 10⁻⁶. -2 In Table 1.5, the units for parameters involving radius of curvature, thickness, and distance are all in mm.

[0316] f L0a f is the effective focal length of the equivalent lens L0a. L0b f is the effective focal length of the second refractive section L0b. L11 f is the effective focal length of lens L11. L12 f is the effective focal length of lens L12. L13 f is the effective focal length of lens L13. L14 f is the effective focal length of lens L14. L21 f is the effective focal length of lens L21. L22 This is the effective focal length of lens L22.

[0317] f g0 f is the effective focal length of the front lens group G0. g1 f is the effective focal length of the first lens group G1. g2 f is the effective focal length of the second lens group G2. g01 ξ is the combined focal length of the front lens group G0 and the first lens group G1, f is the effective focal length of the optical lens 100, and ξ is the focusing stroke compression ratio of the first lens group G1.

[0318] α is the first power distribution ratio of the optical lens 100, α = f / f g1 β is the second power distribution ratio of the optical lens 100, β=f g01 / f g0 .

[0319] n a Let n be the refractive index of the equivalent lens L0a. b Let v be the refractive index of the second refractive part L0b. a v is the Abbe number of the equivalent lens L0a. b r is the Abbe number of the second refractive part L0b. a Let r be the radius of curvature of the convex surface St at the optical axis position of the optical lens 100. b Let d be the radius of curvature of the concave surface Sa at the optical axis position of the optical lens 100. a d represents the thickness of the first refractive part 102 at the optical axis position of the optical lens 100. b The thickness of the second refractive part L0b at the optical axis position of the optical lens 100 is d. p The thickness of the reflecting prism 1 at the optical axis position of the optical lens 100 is given.

[0320] φ L0a φ is the optical power of the equivalent lens L0a. L0b H' is the optical power of the second refractive section L0b. g0a H is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1. g0b d0 is the distance from the object-side principal plane of the second refractive section L0b along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1, and d0 is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the object-side principal plane of the second refractive section L0b. g0 C0 is the optical power of the front lens group G0, and C0 is the chromatic aberration coefficient of the front lens group G0.

[0321] It should be noted that the rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 1.3 to 1.5 differ from those in Table 1.1. The rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 1.3 to 1.5 apply to the equivalent vertical lens formed after unfolding the optical path folding elements. The rules for the signs preceding the thickness and radius of curvature parameters in Tables 1.3 to 1.5 are as follows: (The text then repeats the initials and finals, so the translation will only include the first two characters.) n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 A vertex on the right of the surface is positive, and a vertex on the left is negative. The rules for the sign of the radius of curvature parameter are as follows: Starting with S... nThe vertex of the surface is the origin of the calculation. Positive values ​​are those with the center of the sphere on the right and negative values ​​are those with the center of the sphere on the left.

[0322] Figure 12b The effective focal length f of the front lens group G0 in the optical lens 100 of the fifth embodiment of this application is... g0 The effective focal length f of the equivalent lens L0a L0a The effective focal length f of the second refractive section L0b L0b A graph showing the relationship between the color difference coefficient C0 and the color difference index. Figure 12b It can be seen that the effective focal length f of the equivalent lens L0a L0a The larger the focal length f of the front lens group G0, the greater the effective focal length f. g0 The larger the value of the front lens group G0, the smaller the chromatic aberration coefficient C0; conversely, the smaller the value of the equivalent lens L0a, the smaller the effective focal length f. L0a The smaller the value, the smaller the effective focal length f of the front lens group G0. g0 The smaller the value, the larger the chromatic aberration coefficient C0 of the front lens group G0.

[0323] Figure 12c The effective focal length f of the convex surface St and the front lens group G0 in the optical lens 100 of the fifth embodiment of this application is... g0 The effective focal length f of the equivalent lens L0a L0a The relationship curve. From Figure 12c It can be seen that the radius of curvature r of the convex surface St of the first refractive part 102 is... a The larger the value, the greater the effective focal length f of the equivalent lens L0a. L0a The larger the focal length f of the front lens group G0, the greater the effective focal length f. g0 The larger the radius of curvature r of the convex surface St of the first refractive part 102, the smaller the radius of curvature r. a The smaller the value, the shorter the effective focal length f of the equivalent lens L0a. L0a The smaller the value, the smaller the effective focal length f of the front lens group G0. g0 The smaller.

[0324] Figure 12d The refractive index n of the equivalent lens L0a in the optical lens 100 of the fifth embodiment of this application a With the effective focal length f of the front lens group G0 g0 The effective focal length f of the equivalent lens L0a L0a The Abbe number v of the equivalent lens L0a a Relationship curve diagram; Figure 12e The refractive index n of the equivalent lens L0a in the optical lens 100 of the fifth embodiment of this application a A graph showing the relationship between the chromatic aberration coefficient C0 and the front lens group G0. From... Figure 12d and Figure 12e It can be seen from this that when the refractive index n of the equivalent lens L0a is... a The Abbe number v decreases continuously.a As the focal length of the front lens group G0 increases, the effective focal length f... g0 As the refractive index n of the equivalent lens L0a increases, the chromatic aberration coefficient C0 decreases; conversely, as the refractive index n of the equivalent lens L0a decreases, the chromatic aberration coefficient C0 decreases. a The Abbe number v increases continuously. a As the focal length of the front lens group G0 decreases continuously, the effective focal length f... g0 As the color difference coefficient decreases, the color difference coefficient C0 increases.

[0325] Figure 12f The refractive index n of the second refractive portion L0b in the optical lens 100 of the fifth embodiment of this application b With the effective focal length f of the front lens group G0 g0 The effective focal length f of the second refractive section L0b L0b The Abbe number v of the second refractive part L0b b Relationship curve diagram; Figure 12g The refractive index n of the second refractive portion L0b in the optical lens 100 of the fifth embodiment of this application b A graph showing the relationship between the chromatic aberration coefficient C0 and the front lens group G0. From... Figure 12f and Figure 12g As can be seen from this, when the refractive index n of the second refractive part L0b... b The Abbe number v increases continuously. b As the focal length of the front lens group G0 decreases continuously, the effective focal length f... g0 As the refractive index n of the second refractive section L0b increases, the chromatic aberration coefficient C0 decreases; conversely, as the refractive index n of the second refractive section L0b decreases, the chromatic aberration coefficient C0 decreases. b The Abbe number v decreases continuously. b As the focal length of the front lens group G0 increases, the effective focal length f... g0 As the color difference coefficient decreases, the color difference coefficient C0 increases.

[0326] Figure 12h In the optical lens 100 of the fifth embodiment of this application, the thickness d a Thickness d b Thickness d p With the effective focal length f of the front lens group G0 g0 Relationship curve diagram; Figure 12i In the optical lens 100 of the fifth embodiment of this application, the thickness d a Thickness d b Thickness d p A graph showing the relationship between the chromatic aberration coefficient C0 and the front lens group G0. From... Figure 12h and Figure 12i As can be seen from this, when the thickness d a Thickness d b Thickness d p When all three decrease, the effective focal length f of the front lens group G0 is reduced. g0As the thickness d increases, the color difference coefficient C0 decreases; conversely, as the thickness d decreases, the color difference coefficient C0 decreases. a Thickness d b Thickness d p When all three increase, the effective focal length f of the front lens group G0 is... g0 As the color difference coefficient decreases, the color difference coefficient C0 increases.

[0327] Figure 12j This is an aberration curve of the optical lens 100 in the fifth embodiment of this application when focusing on a distant scene (working distance is infinity) and image height is 0mm. Figure 12k This is an aberration curve of the optical lens 100 in the fifth embodiment of this application when focusing on a distant scene (working distance is infinity) and image height is 4.8494 mm.

[0328] from Figure 12j It can be seen that when the image height is 0 mm, the transverse ray fan curves of different wavelengths are relatively concentrated and the degree of deviation from the center is small, indicating that the on-axis aberration is well controlled; from Figure 12k It can be seen that when the image height is 4.8494 mm, although the off-axis ray curve changes to some extent, it is still within a relatively small scale range (Maximum Scale is ±5.000 μm), and the deviations of light at different wavelengths are not excessively dispersed. Overall, the aberration performance of light at different image heights and wavelengths is quite excellent, thus it can be concluded that the optical lens 100 has good overall aberration control.

[0329] Figure 12l This is an axial chromatic aberration curve of the optical lens 100 in the fifth embodiment of this application when focusing on a distant scene (working distance is infinity). From Figure 12l (Axial chromatic aberration curve) It can be seen that the curves for different wavelengths of light are relatively concentrated and the deviation is small, indicating that the focusing deviation of different wavelengths of light in the axial direction is small. Considering the overall performance of axial chromatic aberration, it can be seen that when focusing on distant objects, the chromatic aberration deviation of different wavelengths of light by the optical lens 100 is small, and the chromatic aberration of the optical lens 100 is well controlled.

[0330] Figure 13a This is an optical path diagram of the optical lens 100 of the camera module 400 in the sixth embodiment of this application during the focusing process, wherein, Figure 13a Figure (1) shows the state diagram of the optical lens 100 when focusing on a distant scene. Figure 13a (2) shows the state diagram of the optical lens 100 when focusing on a close-up.

[0331] Figure 13a The camera module 400 shown is Figures 3-8 The main difference between the camera module 400 shown is that the specific parameters of the camera module 400 are different, as detailed below:

[0332] like Figure 13a As shown, the first lens group G1 is a focusing lens group, and it can move relative to the second lens group G2 along the optical axis AX2 of the first lens group G1, so that the optical lens 100 can focus on a distant object (e.g., Figure 13a (1) shown in the image) and the focus on the close-up (e.g.) Figure 13a Switch between (2) shown in the middle.

[0333] The following section, in conjunction with a specific parameter table, discusses... Figure 13a The camera module 400 shown will be described in detail.

[0334] As shown in Tables 2.1 and 2.2, Table 2.1 shows the main parameters of the camera module 400 in the sixth embodiment of this application, and Table 2.2 shows the aspherical coefficients of each surface of the optical element in the camera module 400 in the sixth embodiment of this application.

[0335] Table 2.1 Main parameters of the camera module 400 in the sixth embodiment of this application

[0336] The units for the parameters of radius of curvature, thickness, and light transmission radius in Table 2.1 are all mm.

[0337] S0 represents the object surface, i.e. the scene being photographed; STO represents the aperture (STOP), which limits the size of the light-passing aperture and affects the amount of light entering the optical system. STO is located on the object-side surface of the first refractive part 102.

[0338] The first refractive part 102 and the reflecting prism 1 form an equivalent lens L0a; S1 represents the object-side surface of the first refractive part 102; S2 represents the image-side surface of the first refractive part 102; S3 represents the incident surface 11 of the reflecting prism 1; S4 represents the reflecting surface 13 of the reflecting prism 1; S5 represents the exit surface 12 of the reflecting prism 1; S6 represents the object-side surface of the second refractive part L0b; and S7 represents the image-side surface of the second refractive part L0b.

[0339] S8 represents the object-side surface of lens L11, S9 represents the image-side surface of lens L11; S10 represents the object-side surface of lens L12, S11 represents the image-side surface of lens L12; S12 represents the object-side surface of lens L13, S13 represents the image-side surface of lens L13, S14 represents the object-side surface of lens L14, and S15 represents the image-side surface of lens L14.

[0340] S16 represents the object-side surface of lens L21, S17 represents the image-side surface of lens L21; S18 represents the object-side surface of lens L22, and S19 represents the image-side surface of lens L22.

[0341] Filter represents filter 300, which is an infrared filter; S20 is the object-side surface of filter 300; S21 is the image-side surface of filter 300; S22 represents image plane IMA, which can be the photosensitive surface of photosensitive element 200.

[0342] In Table 2.1, the surface number S is in the "Thickness" parameter series. n The corresponding numerical value means surface number S n Surface to surface number S n+1 The distance of the surface along the optical axis; the rule for the sign of the thickness parameter is as follows: Starting with S... n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 The vertex of the surface is negative when it is on the right, positive when it is on the left, positive when it is at the bottom, and negative when it is at the top. Thickness (INF) represents the thickness of the optical lens 100 when focusing on a distant scene (i.e., working distance is infinity); Thickness (Macro) represents the thickness of the optical lens 100 when focusing on a close scene (i.e., working distance is macro).

[0343] The radii of curvature in Table 2.1 are the radii of curvature of the corresponding surface number at the optical axis; the rules for the sign of the radii of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. A value of left-hand center is positive, right-hand center is negative, bottom center is positive, and top center is negative. The radius of curvature of INFINITY indicates that the surface corresponding to this parameter is planar.

[0344] In some embodiments, the aspherical surfaces in the camera module 400 can be defined using the following aspherical curve equation: z ; Where z is the distance from the optical axis on the aspherical surface. r The relative distance between the point and the tangent plane at the intersection point on the aspherical optical axis; r is the perpendicular distance between the point on the aspherical curve and the optical axis; c K is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 2.2 for details.

[0345] Table 2.2 Aspheric coefficients of each surface of the camera module 400 in the sixth embodiment of this application

[0346]

[0347] Table 2.3 Main parameters of the camera module 400 in the sixth embodiment of this application

[0348] Table 2.4 Main parameters of the camera module 400 in the sixth embodiment of this application

[0349] Table 2.5 Main parameters of the camera module 400 in the sixth embodiment of this application

[0350] In Tables 2.3 to 2.5, "INF" indicates that the working distance of the subject is infinity; "Macro" indicates that the working distance of the subject is macro, such as 249.211mm. The data mE-n represents m × 10 n For example: 1.960E-02 represents 1.960 × 10 -2 In Table 2.5, the units for the parameters involving radius of curvature, thickness, and distance are all in mm.

[0351] f L0a f is the effective focal length of the equivalent lens L0a. L0b f is the effective focal length of the second refractive section L0b. L11 f is the effective focal length of lens L11. L12 f is the effective focal length of lens L12. L13 f is the effective focal length of lens L13. L14 f is the effective focal length of lens L14. L21 f is the effective focal length of lens L21. L22 This is the effective focal length of lens L22.

[0352] f g0 f is the effective focal length of the front lens group G0. g1 f is the effective focal length of the first lens group G1. g2 f is the effective focal length of the second lens group G2. g01 ξ is the combined focal length of the front lens group G0 and the first lens group G1, f is the effective focal length of the optical lens 100, and ξ is the focusing stroke compression ratio of the first lens group G1.

[0353] α is the first power distribution ratio of the optical lens 100, α = f / f g1 β is the second power distribution ratio of the optical lens 100, β=f g01 / f g0 .

[0354] n a Let n be the refractive index of the equivalent lens L0a. b Let v be the refractive index of the second refractive part L0b. a v is the Abbe number of the equivalent lens L0a. b r is the Abbe number of the second refractive part L0b. aLet r be the radius of curvature of the convex surface St at the optical axis position of the optical lens 100. b Let d be the radius of curvature of the concave surface Sa at the optical axis position of the optical lens 100. a d represents the thickness of the first refractive part 102 at the optical axis position of the optical lens 100. b The thickness of the second refractive part L0b at the optical axis position of the optical lens 100 is d. p The thickness of the reflecting prism 1 at the optical axis position of the optical lens 100 is given.

[0355] φ L0a φ is the optical power of the equivalent lens L0a. L0b H' is the optical power of the second refractive section L0b. g0a H is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1. g0b d0 is the distance from the object-side principal plane of the second refractive section L0b along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1, and d0 is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the object-side principal plane of the second refractive section L0b. g0 C0 is the optical power of the front lens group G0, and C0 is the chromatic aberration coefficient of the front lens group G0.

[0356] It should be noted that the rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 2.3 to 2.5 differ from those in Table 2.1. The rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 2.3 to 2.5 apply to the equivalent vertical lens formed after unfolding the optical path folding elements. The rules for the signs preceding the thickness and radius of curvature parameters in Tables 2.3 to 2.5 are as follows: (The text then repeats the initials and finals, which are not directly related to the initials and finals.) n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 A vertex on the right of the surface is positive, and a vertex on the left is negative. The rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. Positive values ​​are those with the center of the sphere on the right and negative values ​​are those with the center of the sphere on the left.

[0357] Figure 13b This is an aberration curve of the optical lens 100 in the sixth embodiment of this application when focusing on a distant scene (working distance is infinity) and image height is 0mm. Figure 13c This is an aberration curve of the optical lens 100 in the sixth embodiment of this application when focusing on a distant scene (working distance is infinity) and image height is 4.5760 mm.

[0358] from Figure 13bIt can be seen that when the image height is 0 mm, the transverse ray fan curves of different wavelengths are relatively concentrated and the degree of deviation from the center is small, indicating that the on-axis aberration is well controlled; from Figure 13c It can be seen that when the image height is 4.5760mm, although the off-axis ray curve changes to some extent, it is still within a relatively small scale range (Maximum Scale is ±5.000μm), and the deviations of light at different wavelengths are not excessively dispersed. Overall, the aberration performance of light at different image heights and wavelengths is quite excellent, thus it can be concluded that the optical lens 100 has good overall aberration control.

[0359] Figure 13d This is an axial chromatic aberration curve of the optical lens 100 in the sixth embodiment of this application when focusing on a distant scene (working distance is infinity). From Figure 13d (Axial chromatic aberration curve) It can be seen that the curves for different wavelengths of light are relatively concentrated and the deviation is small, indicating that the focusing deviation of different wavelengths of light in the axial direction is small. Considering the overall performance of axial chromatic aberration, it can be seen that when focusing on distant objects, the chromatic aberration deviation of different wavelengths of light by the optical lens 100 is small, and the chromatic aberration of the optical lens 100 is well controlled.

[0360] Figure 14a This is an optical path diagram of the optical lens 100 of the camera module 400 in the seventh embodiment of this application during the focusing process, wherein, Figure 14a Figure (1) shows the state diagram of the optical lens 100 when focusing on a distant scene. Figure 14a (2) shows the state diagram of the optical lens 100 when focusing on a close-up.

[0361] Figure 14a The camera module 400 shown is Figures 3-8 The main difference between the camera module 400 shown is that the specific parameters of the camera module 400 are different, as detailed below: like Figure 14a As shown, the first lens group G1 is a focusing lens group, and it can move relative to the second lens group G2 along the optical axis AX2 of the first lens group G1, so that the optical lens 100 can focus on a distant object (e.g., Figure 14a (1) shown in the image) and the focus on the close-up (e.g.) Figure 14a Switch between (2) shown in the middle.

[0362] The following section, in conjunction with a specific parameter table, discusses... Figure 14a The camera module 400 shown will be described in detail.

[0363] As shown in Tables 3.1 and 3.2, Table 3.1 shows the main parameters of the camera module 400 in the seventh embodiment of this application, and Table 3.2 shows the aspherical coefficients of each surface of the optical element in the camera module 400 in the seventh embodiment of this application.

[0364] Table 3.1 Main parameters of the camera module 400 in the seventh embodiment of this application

[0365] The units for the parameters of radius of curvature, thickness, and light transmission radius in Table 3.1 are all mm.

[0366] S0 represents the object surface, i.e. the scene being photographed; STO represents the aperture (STOP), which limits the size of the light-passing aperture and affects the amount of light entering the optical system. STO is located on the object-side surface of the first refractive part 102.

[0367] The first refractive part 102 and the reflecting prism 1 form an equivalent lens L0a; S1 represents the object-side surface of the first refractive part 102; S2 represents the image-side surface of the first refractive part 102; S3 represents the incident surface 11 of the reflecting prism 1; S4 represents the reflecting surface 13 of the reflecting prism 1; S5 represents the exit surface 12 of the reflecting prism 1; S6 represents the object-side surface of the second refractive part L0b; and S7 represents the image-side surface of the second refractive part L0b.

[0368] S8 represents the object-side surface of lens L11, S9 represents the image-side surface of lens L11; S10 represents the object-side surface of lens L12, S11 represents the image-side surface of lens L12; S12 represents the object-side surface of lens L13, S13 represents the image-side surface of lens L13, S14 represents the object-side surface of lens L14, and S15 represents the image-side surface of lens L14.

[0369] S16 represents the object-side surface of lens L21, S17 represents the image-side surface of lens L21; S18 represents the object-side surface of lens L22, and S19 represents the image-side surface of lens L22.

[0370] Filter represents filter 300, which is an infrared filter; S20 is the object-side surface of filter 300; S21 is the image-side surface of filter 300; S22 represents image plane IMA, which can be the photosensitive surface of photosensitive element 200.

[0371] In Table 3.1, the surface number S is in the "Thickness" parameter series. n The corresponding numerical value means surface number S n Surface to surface number S n+1 The distance of the surface along the optical axis; the rule for the sign of the thickness parameter is as follows: Starting with S... nThe vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 The vertex of the surface is negative when it is on the right, positive when it is on the left, positive when it is at the bottom, and negative when it is at the top. Thickness (INF) represents the thickness of the optical lens 100 when focusing on a distant scene (i.e., working distance is infinity); Thickness (Macro) represents the thickness of the optical lens 100 when focusing on a close scene (i.e., working distance is macro).

[0372] The radii of curvature in Table 3.1 are the radii of curvature of the corresponding surface number at the optical axis; the rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. A value of left-hand center is positive, right-hand center is negative, bottom center is positive, and top center is negative. The radius of curvature of INFINITY indicates that the surface corresponding to this parameter is planar.

[0373] In some embodiments, the aspherical surfaces in the camera module 400 can be defined using the following aspherical curve equation: z ; Where z is the distance from the optical axis on the aspherical surface. r The relative distance between the point and the tangent plane at the intersection point on the aspherical optical axis; r is the perpendicular distance between the point on the aspherical curve and the optical axis; c K is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 3.2 for details.

[0374] Table 3.2 Aspheric coefficients of each surface of the camera module 400 in the seventh embodiment of this application

[0375]

[0376] Table 3.3 Main parameters of the camera module 400 in the seventh embodiment of this application (II)

[0377] Table 3.4 Main parameters of the camera module 400 in the seventh embodiment of this application

[0378] Table 3.5 Main parameters of the camera module 400 in the seventh embodiment of this application

[0379] In Tables 3.3 to 3.5, "INF" indicates that the working distance of the subject is infinity; "Macro" indicates that the working distance of the subject is macro, such as 249.211mm. The data mE-n represents m × 10 nFor example, 3.586E-05 represents 3.586 × 10⁻⁵. -5 In Table 3.5, the units for the parameters involving radius of curvature, thickness, and distance are all in mm.

[0380] f L0a f is the effective focal length of the equivalent lens L0a. L0b f is the effective focal length of the second refractive section L0b. L11 f is the effective focal length of lens L11. L12 f is the effective focal length of lens L12. L13 f is the effective focal length of lens L13. L14 f is the effective focal length of lens L14. L21 f is the effective focal length of lens L21. L22 This is the effective focal length of lens L22.

[0381] f g0 f is the effective focal length of the front lens group G0. g1 f is the effective focal length of the first lens group G1. g2 f is the effective focal length of the second lens group G2. g01 ξ is the combined focal length of the front lens group G0 and the first lens group G1, f is the effective focal length of the optical lens 100, and ξ is the focusing stroke compression ratio of the first lens group G1.

[0382] α is the first power distribution ratio of the optical lens 100, α = f / f g1 β is the second power distribution ratio of the optical lens 100, β=f g01 / f g0 .

[0383] n a Let n be the refractive index of the equivalent lens L0a. b Let v be the refractive index of the second refractive part L0b. a v is the Abbe number of the equivalent lens L0a. b r is the Abbe number of the second refractive part L0b. a Let r be the radius of curvature of the convex surface St at the optical axis position of the optical lens 100. b Let d be the radius of curvature of the concave surface Sa at the optical axis position of the optical lens 100. a d represents the thickness of the first refractive part 102 at the optical axis position of the optical lens 100. b The thickness of the second refractive part L0b at the optical axis position of the optical lens 100 is d. p The thickness of the reflecting prism 1 at the optical axis position of the optical lens 100 is given.

[0384] φ L0a φ is the optical power of the equivalent lens L0a. L0bH' is the optical power of the second refractive section L0b. g0a H is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1. g0b d0 is the distance from the object-side principal plane of the second refractive section L0b along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1, and d0 is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the object-side principal plane of the second refractive section L0b. g0 C0 is the optical power of the front lens group G0, and C0 is the chromatic aberration coefficient of the front lens group G0.

[0385] It should be noted that the rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 3.3 to 3.5 differ from those in Table 3.1. The rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 3.3 to 3.5 apply to the equivalent vertical lens formed after unfolding the optical path folding elements. The rules for the signs preceding the thickness and radius of curvature parameters in Tables 3.3 to 3.5 are as follows: (The text then repeats the initials and finals, so the translation will only include the first two characters.) n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 A vertex on the right of the surface is positive, and a vertex on the left is negative. The rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. Positive values ​​are those with the center of the sphere on the right and negative values ​​are those with the center of the sphere on the left.

[0386] Figure 14b This is an aberration curve diagram of the optical lens 100 in the seventh embodiment of this application when focusing on a distant scene (working distance is infinity) and image height is 0mm. Figure 14c This is an aberration curve of the optical lens 100 in the seventh embodiment of this application when focusing on a distant scene (working distance is infinity) and image height is 4.7145mm.

[0387] from Figure 14b It can be seen that when the image height is 0 mm, the transverse ray fan curves of different wavelengths are relatively concentrated and the degree of deviation from the center is small, indicating that the on-axis aberration is well controlled; from Figure 14c It can be seen that when the image height is 4.7145 mm, although the off-axis ray curve changes to some extent, it is still within a relatively small scale range (Maximum Scale is ±5.000 μm), and the deviations of light at different wavelengths are not excessively dispersed. Overall, the aberration performance of light at different image heights and wavelengths is quite excellent, thus it can be concluded that the optical lens 100 has good overall aberration control.

[0388] Figure 14dThis is an axial chromatic aberration curve of the optical lens 100 in the seventh embodiment of this application when focusing on a distant scene (working distance is infinity). From Figure 14d It can be seen that the curves of different wavelengths of light are relatively concentrated and the degree of deviation is small, indicating that the focusing deviation of different wavelengths of light in the axial direction is small. Considering the overall axial chromatic aberration performance, it can be seen that the chromatic aberration deviation of different wavelengths of light is small when focusing on distant objects, and the chromatic aberration of the optical lens 100 is well controlled.

[0389] Figure 15a This is an optical path diagram of the optical lens 100 of the camera module 400 in the eighth embodiment of this application during the focusing process, wherein, Figure 15a Figure (1) shows the state diagram of the optical lens 100 when focusing on a distant scene. Figure 15a (2) shows the state diagram of the optical lens 100 when focusing on a close-up.

[0390] Figure 15a The camera module 400 shown is Figure 12a The main differences between the camera module 400 shown are: the composition of the second lens group G2 of the optical lens 100 is different; and the specific parameters of the camera module 400 are different, as detailed below: like Figure 15a As shown, the first lens group G1 is a focusing lens group, and it can move relative to the second lens group G2 along the optical axis AX2 of the first lens group G1, so that the optical lens 100 can focus on a distant object (e.g., Figure 15a (1) shown in the image) and the focus on the close-up (e.g.) Figure 15a Switch between (2) shown in the middle.

[0391] In some embodiments, such as Figure 15a As shown, the first lens group G1 has four lenses along the object-to-image direction (e.g., Figure 15a (From left to right in the middle), the four lenses of the first lens group G1 are, in order, a positive lens L11, a negative lens L12, a positive lens L13, and a positive lens L14; the four lenses of the second lens group G2 are, in order, a negative lens L21, a negative lens L22, a positive lens L23, and a negative lens L24, along the direction from the object side to the image side.

[0392] By using a combination of positive and negative optical powers for the lenses in the first lens group G1 and the second lens group G1, some aberrations can be canceled out, which is beneficial for correcting the aberrations of the optical lens 100.

[0393] The following section, in conjunction with a specific parameter table, discusses... Figure 15a The camera module 400 shown will be described in detail.

[0394] As shown in Tables 4.1 and 4.2, Table 4.1 shows the main parameters of the camera module 400 in the eighth embodiment of this application, and Table 4.2 shows the aspherical coefficients of each surface of the optical element in the camera module 400 in the eighth embodiment of this application.

[0395] Table 4.1 Main parameters of the camera module 400 in the eighth embodiment of this application

[0396] The units for the parameters of radius of curvature, thickness, and light transmission radius in Table 4.1 are all mm.

[0397] S0 represents the object plane, i.e., the subject of the photograph; STO represents the aperture (STOP), which limits the size of the light-gathering aperture and affects the amount of light entering the optical system.

[0398] The first refractive part 102 and the reflecting prism 1 form an equivalent lens L0a; S2 represents the object-side surface of the first refractive part 102; S3 represents the image-side surface of the first refractive part 102; S4 represents the incident surface 11 of the reflecting prism 1; S5 represents the reflecting surface 13 of the reflecting prism 1; S6 represents the exit surface 12 of the reflecting prism 1; S7 represents the object-side surface of the second refractive part L0b; and S8 represents the image-side surface of the second refractive part L0b.

[0399] S9 represents the object-side surface of lens L11, S10 represents the image-side surface of lens L11; S11 represents the object-side surface of lens L12, S12 represents the image-side surface of lens L12; S13 represents the object-side surface of lens L13, S14 represents the image-side surface of lens L13, S15 represents the object-side surface of lens L14, and S16 represents the image-side surface of lens L14.

[0400] S17 represents the object-side surface of lens L21, S18 represents the image-side surface of lens L21; S19 represents the object-side surface of lens L22, S20 represents the image-side surface of lens L22; S21 represents the object-side surface of lens L23, S22 represents the image-side surface of lens L23; S23 represents the object-side surface of lens L24, S24 represents the image-side surface of lens L24.

[0401] Filter represents filter 300, which is an infrared filter; S25 is the object-side surface of filter 300; S26 is the image-side surface of filter 300; S27 represents image plane IMA, which can be the photosensitive surface of photosensitive element 200.

[0402] In Table 4.1, the surface number S is in the "Thickness" parameter series. n The corresponding numerical value means surface number Sn Surface to surface number S n+1 The distance of the surface along the optical axis; the rule for the sign of the thickness parameter is as follows: Starting with S... n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 The vertex of the surface is negative when it is on the right, positive when it is on the left, positive when it is at the bottom, and negative when it is at the top. Thickness (INF) represents the thickness of the optical lens 100 when focusing on a distant scene (i.e., working distance is infinity); Thickness (Macro) represents the thickness of the optical lens 100 when focusing on a close scene (i.e., working distance is macro).

[0403] The radii of curvature in Table 4.1 are the radii of curvature of the corresponding surface number at the optical axis; the rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. A value of left-hand center is positive, right-hand center is negative, bottom center is positive, and top center is negative. The radius of curvature of INFINITY indicates that the surface corresponding to this parameter is planar.

[0404] In some embodiments, the aspherical surfaces in the camera module 400 can be defined using the following aspherical curve equation: z ; Where z is the distance from the optical axis on the aspherical surface. r The relative distance between the point and the tangent plane at the intersection point on the aspherical optical axis; r is the perpendicular distance between the point on the aspherical curve and the optical axis; c K is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 4.2 for details.

[0405] Table 4.2 Aspheric coefficients of each surface of the camera module 400 in the eighth embodiment of this application

[0406]

[0407] Table 4.3 Main parameters of the camera module 400 in the eighth embodiment of this application (II)

[0408] Table 4.4 Main parameters of the camera module 400 in the eighth embodiment of this application

[0409] Table 4.5 Main parameters of the camera module 400 in the eighth embodiment of this application

[0410] In Tables 4.3 and 4.5, "INF" indicates that the working distance of the subject is infinity; "Macro" indicates that the working distance of the subject is macro, such as 159.474mm. The data mE-n represents m × 10 n For example, 1.449E-04 represents 1.449 × 10⁻⁴. -4 In Table 4.5, the units for the parameters involving radius of curvature, thickness, and distance are all in mm.

[0411] f L0a f is the effective focal length of the equivalent lens L0a. L0b f is the effective focal length of the second refractive section L0b. L11 f is the effective focal length of lens L11. L12 f is the effective focal length of lens L12. L13 f is the effective focal length of lens L13. L14 f is the effective focal length of lens L14. L21 f is the effective focal length of lens L21. L22 f is the effective focal length of lens L22; L23 f is the effective focal length of lens L23. L24 This is the effective focal length of lens L24.

[0412] f g0 f is the effective focal length of the front lens group G0. g1 f is the effective focal length of the first lens group G1. g2 f is the effective focal length of the second lens group G2. g01 ξ is the combined focal length of the front lens group G0 and the first lens group G1, f is the effective focal length of the optical lens 100, and ξ is the focusing stroke compression ratio of the first lens group G1.

[0413] α is the first power distribution ratio of the optical lens 100, α = f / f g1 β is the second power distribution ratio of the optical lens 100, β=f g01 / f g0 .

[0414] n a Let n be the refractive index of the equivalent lens L0a. b Let v be the refractive index of the second refractive part L0b. a v is the Abbe number of the equivalent lens L0a. b r is the Abbe number of the second refractive part L0b. a Let r be the radius of curvature of the convex surface St at the optical axis position of the optical lens 100. b Let d be the radius of curvature of the concave surface Sa at the optical axis position of the optical lens 100. ad represents the thickness of the first refractive part 102 at the optical axis position of the optical lens 100. b The thickness of the second refractive part L0b at the optical axis position of the optical lens 100 is d. p The thickness of the reflecting prism 1 at the optical axis position of the optical lens 100 is given.

[0415] φ L0a φ is the optical power of the equivalent lens L0a. L0b H' is the optical power of the second refractive section L0b. g0a H is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1. g0b d0 is the distance from the object-side principal plane of the second refractive section L0b along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1, and d0 is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the object-side principal plane of the second refractive section L0b. g0 C0 is the optical power of the front lens group G0, and C0 is the chromatic aberration coefficient of the front lens group G0.

[0416] It should be noted that the rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 4.3 to 4.5 differ from those in Table 4.1. The rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 4.3 to 4.5 apply to the equivalent vertical lens formed after unfolding the optical path folding elements. The rules for the signs preceding the thickness and radius of curvature parameters in Tables 4.3 to 4.5 are as follows: (The text then repeats the initials and finals, which are not directly related to the initials and finals.) n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 A vertex on the right of the surface is positive, and a vertex on the left is negative. The rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. Positive values ​​are those with the center of the sphere on the right and negative values ​​are those with the center of the sphere on the left.

[0417] Figure 15b The above are field curvature and distortion curves of the optical lens 100 in the eighth embodiment of this application when focusing on a distant scene (working distance is infinite).

[0418] Figure 15b The field curvature curves in the figure show the optimal image plane curvature of the optical lens 100 at different image heights (IMGHT). The field curvature curves consist of two curves (solid and dashed lines), representing the field curvature in different meridional and sagittal directions, respectively. The horizontal axis represents the focal position (FOCUS, in millimeters), and the vertical axis represents the image height. It can be seen that, in Figure 15bIn the figure, although the two field curvature curves are somewhat curved, the overall change is relatively gentle and there are no drastic fluctuations. This indicates that the field curvature of the optical lens 100 does not change much under different image heights, which means that the optical lens 100 has done a good job of correcting field curvature aberrations and can ensure the flatness of the image plane under different fields of view to a certain extent, so that the image quality is relatively uniform at different image heights.

[0419] Figure 15b The distortion curve in the image reflects the distortion produced by the optical lens 100. The horizontal axis represents the percentage of distortion (%DISTORTION), and the vertical axis represents the image height (IMGHT). Distortion causes geometric deformation in the image, and is classified into barrel distortion and pincushion distortion, among others. Figure 15b Looking at the distortion curve, it is close to the vertical axis for most of the image height range, meaning the distortion percentage is less than 1.0. This indicates that the distortion produced by the optical lens 100 is very small, demonstrating that the optical lens 100 has a good distortion aberration correction effect, ensuring the accuracy of the image geometry and making the image close to the geometry of the real object.

[0420] Figure 15c This is an axial chromatic aberration curve of the optical lens 100 in the eighth embodiment of this application when focusing on a distant scene (working distance is infinity). From Figure 15c It can be seen that the curves of different wavelengths of light are relatively concentrated and the degree of deviation is small, indicating that the focusing deviation of different wavelengths of light in the axial direction is small. Considering the overall axial chromatic aberration performance, it can be seen that the chromatic aberration deviation of different wavelengths of light is small when focusing on distant objects, and the chromatic aberration of the optical lens 100 is well controlled.

[0421] Figure 16a This is an optical path diagram of the optical lens 100 of the camera module 400 in the ninth embodiment of this application during the focusing process, wherein, Figure 16a Figure (1) shows the state diagram of the optical lens 100 when focusing on a distant scene. Figure 16a (2) shows the state diagram of the optical lens 100 when focusing on a close-up.

[0422] Figure 16a The camera module 400 shown is Figure 12a The main differences between the camera module 400 shown are: the composition of the second lens group G2 of the optical lens 100 is different; and the specific parameters of the camera module 400 are different, as detailed below: like Figure 16a As shown, the first lens group G1 is a focusing lens group, and it can move relative to the second lens group G2 along the optical axis AX2 of the first lens group G1, so that the optical lens 100 can focus on a distant object (e.g., Figure 16a (1) shown in the image) and the focus on the close-up (e.g.) Figure 16a Switch between (2) shown in the middle.

[0423] In some embodiments, such as Figure 16a As shown, the first lens group G1 has four lenses along the object-to-image direction (e.g., Figure 15a (From left to right in the middle), the four lenses of the first lens group G1 are, in order, a positive lens L11, a negative lens L12, a positive lens L13, and a positive lens L14; the four lenses of the second lens group G2 are, in order, a negative lens L21, a negative lens L22, a positive lens L23, and a negative lens L24, along the direction from the object side to the image side.

[0424] The following section, in conjunction with a specific parameter table, discusses... Figure 16a The camera module 400 shown will be described in detail.

[0425] As shown in Tables 5.1 and 5.2, Table 5.1 shows the main parameters of the camera module 400 in the ninth embodiment of this application, and Table 5.2 shows the aspherical coefficients of each surface of the optical element in the camera module 400 in the ninth embodiment of this application.

[0426] Table 5.1 Main parameters of the camera module 400 in the ninth embodiment of this application

[0427] The units for the parameters of radius of curvature, thickness, and light transmission radius in Table 5.1 are all mm.

[0428] S0 represents the object plane, i.e., the subject of the photograph; STO represents the aperture (STOP), which limits the size of the light-gathering aperture and affects the amount of light entering the optical system.

[0429] The first refractive part 102 and the reflecting prism 1 form an equivalent lens L0a; S2 represents the object-side surface of the first refractive part 102; S3 represents the image-side surface of the first refractive part 102; S4 represents the incident surface 11 of the reflecting prism 1; S5 represents the reflecting surface 13 of the reflecting prism 1; S6 represents the exit surface 12 of the reflecting prism 1; S7 represents the object-side surface of the second refractive part L0b; and S8 represents the image-side surface of the second refractive part L0b.

[0430] S9 represents the object-side surface of lens L11, S10 represents the image-side surface of lens L11; S11 represents the object-side surface of lens L12, S12 represents the image-side surface of lens L12; S13 represents the object-side surface of lens L13, S14 represents the image-side surface of lens L13, S15 represents the object-side surface of lens L14, and S16 represents the image-side surface of lens L14.

[0431] S17 represents the object-side surface of lens L21, S18 represents the image-side surface of lens L21; S19 represents the object-side surface of lens L22, S20 represents the image-side surface of lens L22; S21 represents the object-side surface of lens L23, S22 represents the image-side surface of lens L23; S23 represents the object-side surface of lens L24, S24 represents the image-side surface of lens L24.

[0432] Filter represents filter 300, which is an infrared filter; S25 is the object-side surface of filter 300; S26 is the image-side surface of filter 300; S27 represents image plane IMA, which can be the photosensitive surface of photosensitive element 200.

[0433] In Table 5.1, the surface number S is in the "Thickness" parameter series. n The corresponding numerical value means surface number S n Surface to surface number S n+1 The distance of the surface along the optical axis; the rule for the sign of the thickness parameter is as follows: Starting with S... n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 The vertex of the surface is negative when it is on the right, positive when it is on the left, positive when it is at the bottom, and negative when it is at the top. Thickness (INF) represents the thickness of the optical lens 100 when focusing on a distant scene (i.e., working distance is infinity); Thickness (Macro) represents the thickness of the optical lens 100 when focusing on a close scene (i.e., working distance is macro).

[0434] The radii of curvature in Table 5.1 are the radii of curvature of the corresponding surface number at the optical axis; the rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. A value of left-hand center is positive, right-hand center is negative, bottom center is positive, and top center is negative. The radius of curvature of INFINITY indicates that the surface corresponding to this parameter is planar.

[0435] In some embodiments, the aspherical surfaces in the camera module 400 can be defined using the following aspherical curve equation: z ; Where z is the distance from the optical axis on the aspherical surface. r The relative distance between the point and the tangent plane at the intersection point on the aspherical optical axis; r is the perpendicular distance between the point on the aspherical curve and the optical axis; c K is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 5.2 for details.

[0436] Table 5.2 Aspheric coefficients of each surface of the camera module 400 in the ninth embodiment of this application

[0437]

[0438] Table 5.3 Main parameters of the camera module 400 in the ninth embodiment of this application (II)

[0439] Table 5.4 Main parameters of camera module 400 in the ninth embodiment of this application

[0440] Table 5.5 Main parameters of the camera module 400 in the ninth embodiment of this application

[0441] In Tables 5.3 and 5.5, "INF" indicates that the working distance of the subject is infinity; "Macro" indicates that the working distance of the subject is macro, such as 184.091mm. The data mE-n represents m × 10 n For example, 3.266E-04 represents 3.266 × 10⁻⁴. -4 In Table 5.5, the units for the parameters involving radius of curvature, thickness, and distance are all in mm.

[0442] f L0a f is the effective focal length of the equivalent lens L0a. L0b f is the effective focal length of the second refractive section L0b. L11 f is the effective focal length of lens L11. L12 f is the effective focal length of lens L12. L13 f is the effective focal length of lens L13. L14 f is the effective focal length of lens L14. L21 f is the effective focal length of lens L21. L22 f is the effective focal length of lens L22; L23 f is the effective focal length of lens L23. L24 This is the effective focal length of lens L24.

[0443] f g0 f is the effective focal length of the front lens group G0. g1 f is the effective focal length of the first lens group G1. g2 f is the effective focal length of the second lens group G2. g01 ξ is the combined focal length of the front lens group G0 and the first lens group G1, f is the effective focal length of the optical lens 100, and ξ is the focusing stroke compression ratio of the first lens group G1.

[0444] α is the first power distribution ratio of the optical lens 100, α = f / f g1 β is the second power distribution ratio of the optical lens 100, β=f g01 / f g0 .

[0445] n a Let n be the refractive index of the equivalent lens L0a. b Let v be the refractive index of the second refractive part L0b. a v is the Abbe number of the equivalent lens L0a. b r is the Abbe number of the second refractive part L0b. a Let r be the radius of curvature of the convex surface St at the optical axis position of the optical lens 100. b Let d be the radius of curvature of the concave surface Sa at the optical axis position of the optical lens 100. a d represents the thickness of the first refractive part 102 at the optical axis position of the optical lens 100. b The thickness of the second refractive part L0b at the optical axis position of the optical lens 100 is d. p The thickness of the reflecting prism 1 at the optical axis position of the optical lens 100 is given.

[0446] φ L0a φ is the optical power of the equivalent lens L0a. L0b H' is the optical power of the second refractive section L0b. g0a H is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1. g0b d0 is the distance from the object-side principal plane of the second refractive section L0b along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1, and d0 is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the object-side principal plane of the second refractive section L0b. g0 C0 is the optical power of the front lens group G0, and C0 is the chromatic aberration coefficient of the front lens group G0.

[0447] It should be noted that the rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 5.3 to 5.5 differ from those in Table 5.1. The rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 5.3 to 5.5 apply to the equivalent vertical lens formed after unfolding the optical path folding elements. The rules for the signs preceding the thickness and radius of curvature parameters in Tables 5.3 to 5.5 are as follows: (The text then repeats the initials and finals, so the translation will only include the first two characters.) n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 A vertex on the right of the surface is positive, and a vertex on the left is negative. The rules for the sign of the radius of curvature parameter are as follows: Starting with S... nThe vertex of the surface is the origin of the calculation. Positive values ​​are those with the center of the sphere on the right and negative values ​​are those with the center of the sphere on the left.

[0448] Figure 16b The diagram shows the field curvature and distortion curves of the optical lens 100 in the ninth embodiment of this application when focusing on a distant scene (working distance is infinite).

[0449] Figure 16b The field curvature curves in the figure show the optimal image plane curvature of the optical lens 100 at different image heights (IMGHT). The field curvature curves consist of two curves (solid and dashed lines), representing the field curvature in different meridional and sagittal directions, respectively. The horizontal axis represents the focal position (FOCUS, in millimeters), and the vertical axis represents the image height. It can be seen that, in Figure 16b In the figure, although the two field curvature curves are somewhat curved, the overall change is relatively gentle and there are no drastic fluctuations. This indicates that the field curvature of the optical lens 100 does not change much under different image heights, which means that the optical lens 100 has done a good job of correcting field curvature aberrations and can ensure the flatness of the image plane under different fields of view to a certain extent, so that the image quality is relatively uniform at different image heights.

[0450] Figure 16b The distortion curve in the image reflects the distortion produced by the optical lens 100. The horizontal axis represents the percentage of distortion (%DISTORTION), and the vertical axis represents the image height (IMGHT). Distortion causes geometric deformation in the image, and is classified into barrel distortion and pincushion distortion, among others. Figure 16b Looking at the distortion curve, it is close to the vertical axis for most of the image height range, meaning the distortion percentage is less than 0.5%. This indicates that the distortion produced by the optical lens 100 is very small, demonstrating that the optical lens 100 has a good distortion correction effect, ensuring the accuracy of the image geometry and making the image close to the geometry of the real object.

[0451] Figure 16c This is an axial chromatic aberration curve of the optical lens 100 in the ninth embodiment of this application when focusing on a distant scene (working distance is infinity). From Figure 16c It can be seen that the curves of different wavelengths of light are relatively concentrated and the degree of deviation is small, indicating that the focusing deviation of different wavelengths of light in the axial direction is small. Considering the overall axial chromatic aberration performance, it can be seen that the chromatic aberration deviation of different wavelengths of light is small when focusing on distant objects, and the chromatic aberration of the optical lens 100 is well controlled.

[0452] Figure 17a This is an optical path diagram of the optical lens 100 of the camera module 400 in the tenth embodiment of this application during the focusing process, wherein, Figure 17a Figure (1) shows the state diagram of the optical lens 100 when focusing on a distant scene. Figure 17a (2) shows the state diagram of the optical lens 100 when focusing on a close-up.

[0453] Figure 17a The camera module 400 shown is Figures 3-8 The main difference between the camera module 400 shown is that the specific parameters of the camera module 400 are different, as detailed below:

[0454] like Figure 17a As shown, the first lens group G1 is a focusing lens group, and it can move relative to the second lens group G2 along the optical axis AX2 of the first lens group G1, so that the optical lens 100 can focus on a distant object (e.g., Figure 17a (1) shown in the image) and the focus on the close-up (e.g.) Figure 17a Switch between (2) shown in the middle.

[0455] The following section, in conjunction with a specific parameter table, discusses... Figure 17a The camera module 400 shown will be described in detail.

[0456] As shown in Tables 6.1 and 6.2, Table 6.1 shows the main parameters of the camera module 400 in the tenth embodiment of this application, and Table 6.2 shows the aspherical coefficients of each surface of the optical element in the camera module 400 in the tenth embodiment of this application.

[0457] Table 6.1 Main parameters of the camera module 400 in the tenth embodiment of this application

[0458] The units for the parameters of radius of curvature, thickness, and light transmission radius in Table 6.1 are all mm.

[0459] S0 represents the object surface, i.e. the scene being photographed; STO represents the aperture (STOP), which limits the size of the light-passing aperture and affects the amount of light entering the optical system. STO is located on the object-side surface of the first refractive part 102.

[0460] The first refractive part 102 and the reflecting prism 1 form an equivalent lens L0a; S1 represents the object-side surface of the first refractive part 102; S2 represents the image-side surface of the first refractive part 102; S3 represents the incident surface 11 of the reflecting prism 1; S4 represents the reflecting surface 13 of the reflecting prism 1; S5 represents the exit surface 12 of the reflecting prism 1; S6 represents the object-side surface of the second refractive part L0b; and S7 represents the image-side surface of the second refractive part L0b.

[0461] S8 represents the object-side surface of lens L11, S9 represents the image-side surface of lens L11; S10 represents the object-side surface of lens L12, S11 represents the image-side surface of lens L12; S12 represents the object-side surface of lens L13, S13 represents the image-side surface of lens L13, S14 represents the object-side surface of lens L14, and S15 represents the image-side surface of lens L14.

[0462] S16 represents the object-side surface of lens L21, S17 represents the image-side surface of lens L21; S18 represents the object-side surface of lens L22, and S19 represents the image-side surface of lens L22.

[0463] Filter represents filter 300, which is an infrared filter; S20 is the object-side surface of filter 300; S21 is the image-side surface of filter 300; S22 represents image plane IMA, which can be the photosensitive surface of photosensitive element 200.

[0464] In Table 6.1, the surface number S in the "Thickness" parameter series n The corresponding numerical value means surface number S n Surface to surface number S n+1 The distance of the surface along the optical axis; the rule for the sign of the thickness parameter is as follows: Starting with S... n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 The vertex of the surface is negative when it is on the right, positive when it is on the left, positive when it is at the bottom, and negative when it is at the top. Thickness (INF) represents the thickness of the optical lens 100 when focusing on a distant scene (i.e., working distance is infinity); Thickness (Macro) represents the thickness of the optical lens 100 when focusing on a close scene (i.e., working distance is macro).

[0465] The radii of curvature in Table 6.1 are the radii of curvature of the corresponding surface number at the optical axis; the rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. A value of left-hand center is positive, right-hand center is negative, bottom center is positive, and top center is negative. The radius of curvature of INFINITY indicates that the surface corresponding to this parameter is planar.

[0466] In some embodiments, the aspherical surfaces in the camera module 400 can be defined using the following aspherical curve equation: z ; Where z is the distance from the optical axis on the aspherical surface. r The relative distance between the point and the tangent plane at the intersection point on the aspherical optical axis; r is the perpendicular distance between the point on the aspherical curve and the optical axis; c K is the curvature; K is the cone coefficient; A i For the i-th order aspherical coefficients, see Table 6.2 for details.

[0467] Table 6.2 Aspheric coefficients of each surface of the camera module 400 in the tenth embodiment of this application

[0468]

[0469] Table 6.3 Main parameters of the camera module 400 in the tenth embodiment of this application (II)

[0470] Table 6.4 Main parameters of the camera module 400 in the tenth embodiment of this application (Part 3)

[0471] Table 6.5 Main parameters of the camera module 400 in the tenth embodiment of this application

[0472] In Tables 6.3 and 6.5, "INF" indicates that the working distance of the subject is infinity; "Macro" indicates that the working distance of the subject is macro, such as 214.422mm. The data mE-n represents m × 10 n For example: -1.254E-04 represents -1.254 × 10 -4 In Table 6.5, the units for the parameters involving radius of curvature, thickness, and distance are all in mm.

[0473] f L0a f is the effective focal length of the equivalent lens L0a. L0b f is the effective focal length of the second refractive section L0b. L11 f is the effective focal length of lens L11. L12 f is the effective focal length of lens L12. L13 f is the effective focal length of lens L13. L14 f is the effective focal length of lens L14. L21 f is the effective focal length of lens L21. L22 This is the effective focal length of lens L22.

[0474] f g0 f is the effective focal length of the front lens group G0. g1 f is the effective focal length of the first lens group G1. g2 f is the effective focal length of the second lens group G2. g01 ξ is the combined focal length of the front lens group G0 and the first lens group G1, f is the effective focal length of the optical lens 100, and ξ is the focusing stroke compression ratio of the first lens group G1.

[0475] α is the first power distribution ratio of the optical lens 100, α = f / f g1 β is the second power distribution ratio of the optical lens 100, β=f g01 / f g0 .

[0476] n a Let n be the refractive index of the equivalent lens L0a.b Let v be the refractive index of the second refractive part L0b. a v is the Abbe number of the equivalent lens L0a. b r is the Abbe number of the second refractive part L0b. a Let r be the radius of curvature of the convex surface St at the optical axis position of the optical lens 100. b Let d be the radius of curvature of the concave surface Sa at the optical axis position of the optical lens 100. a d represents the thickness of the first refractive part 102 at the optical axis position of the optical lens 100. b The thickness of the second refractive part L0b at the optical axis position of the optical lens 100 is d. p The thickness of the reflecting prism 1 at the optical axis position of the optical lens 100 is given.

[0477] φ L0a φ is the optical power of the equivalent lens L0a. L0b H' is the optical power of the second refractive section L0b. g0a H is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1. g0b d0 is the distance from the object-side principal plane of the second refractive section L0b along the optical axis of the optical lens 100 to the exit surface 13 of the reflecting prism 1, and d0 is the distance from the image-side principal plane of the equivalent lens L0a along the optical axis of the optical lens 100 to the object-side principal plane of the second refractive section L0b. g0 C0 is the optical power of the front lens group G0, and C0 is the chromatic aberration coefficient of the front lens group G0.

[0478] It should be noted that the rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 6.3 to 6.5 differ from those in Table 6.1. The rules for the signs preceding the "radius of curvature" and "thickness (distance)" parameters in Tables 6.3 to 6.5 apply to the equivalent vertical lens formed after unfolding the optical path folding elements. The rules for the signs preceding the thickness and radius of curvature parameters in Tables 6.3 to 6.5 are as follows: (The text then repeats the initials and finals, which are not directly related to the initials and finals.) n The vertex of the surface (the intersection with the optical axis) is the origin for calculation, S n+1 A vertex on the right of the surface is positive, and a vertex on the left is negative. The rules for the sign of the radius of curvature parameter are as follows: Starting with S... n The vertex of the surface is the origin of the calculation. Positive values ​​are those with the center of the sphere on the right and negative values ​​are those with the center of the sphere on the left.

[0479] Figure 17b The above are field curvature and distortion curves of the optical lens 100 in the tenth embodiment of this application when focusing on a distant scene (working distance is infinite).

[0480] Figure 17bThe field curvature curves in the figure show the optimal image plane curvature of the optical lens 100 at different image heights (IMGHT). The field curvature curves consist of two curves (solid and dashed lines), representing the field curvature in different meridional and sagittal directions, respectively. The horizontal axis represents the focal position (FOCUS, in millimeters), and the vertical axis represents the image height. It can be seen that, in Figure 17b In the figure, although the two field curvature curves are somewhat curved, the overall change is relatively gentle and there are no drastic fluctuations. This indicates that the field curvature of the optical lens 100 does not change much under different image heights, which means that the optical lens 100 has done a good job of correcting field curvature aberrations and can ensure the flatness of the image plane under different fields of view to a certain extent, so that the image quality is relatively uniform at different image heights.

[0481] Figure 17b The distortion curve in the image reflects the distortion produced by the optical lens 100. The horizontal axis represents the percentage of distortion (%DISTORTION), and the vertical axis represents the image height (IMGHT). Distortion causes geometric deformation in the image, and is classified into barrel distortion and pincushion distortion, among others. Figure 17b Looking at the distortion curve, it is close to the vertical axis for most of the image height range, meaning the distortion percentage is less than 2.0%. This indicates that the distortion produced by the optical lens 100 is very small, demonstrating that the optical lens 100 has a good distortion correction effect, ensuring the accuracy of the image geometry and making the image close to the geometry of the real object.

[0482] Figure 17c This is an axial chromatic aberration curve of the optical lens 100 in the tenth embodiment of this application when focusing on a distant scene (working distance is infinity). From Figure 17c It can be seen that the curves of different wavelengths of light are relatively concentrated and the degree of deviation is small, indicating that the focusing deviation of different wavelengths of light in the axial direction is small. Considering the overall axial chromatic aberration performance, it can be seen that the chromatic aberration deviation of different wavelengths of light is small when focusing on distant objects, and the chromatic aberration of the optical lens 100 is well controlled.

[0483] The following table summarizes some key parameters of the optical lens 100 in some embodiments of this application:

[0484]

[0485] All parameters in the table, including radius of curvature, thickness, and distance, are in mm.

[0486] The types of cross-sectional lines in the accompanying drawings are for distinguishing different components and should not be construed as limiting the materials of the components. The accompanying drawings are for illustrating structural composition and are not shown to scale of the actual product.

[0487] While the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this application. To provide a thorough understanding of this application, many specific details are included in the above description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0488] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0489] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0490] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two.

[0491] In the embodiments of this application, the positional relationship terminology "perpendicular" can mean absolutely perpendicular or approximately perpendicular (e.g., angular deviation within 1°); "parallel" can mean absolutely parallel or approximately parallel (e.g., angular deviation within 1°). In the embodiments of this application, two angles being equal can mean absolutely equal or approximately equal (e.g., angular deviation within 1°).

[0492] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0493] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An optical lens characterized in that, The optical lens comprises a front lens group (G0) and a rear lens group (G10) located on the image side of the front lens group (G0); The front lens group (G0) is a prism assembly and has positive focal power, and comprises a main body (101), a first refractive part (102) located on the light entrance side of the main body (101), and a second refractive part (L0b) located on the light exit side of the main body (101), wherein the main body (101) is configured to reflect light passing through the first refractive part (102) to the second refractive part (L0b) and direct the light to the rear lens group (G10) by the second refractive part (L0b); The first refractive part (102) is in close contact with or integrally formed with the main body (101), and the second refractive part (L0b) is in close contact with or integrally formed with the main body (101), and the first refractive part (102) and the main body (101) together form an equivalent lens (L0a) having positive focal power, and the second refractive part (L0b) has negative focal power; The front lens group (G0) is an anti-shake lens group and can rotate around at least one of a first axis (31), a second axis (32) and a third axis (33), wherein the first axis (31) is parallel to the optical axis of the first refractive part (102), the second axis (32) is parallel to the optical axis of the second refractive part (L0b), and the third axis (33) is perpendicular to both the first axis (31) and the second axis (32); The chromatic aberration coefficient C0 of the front lens group (G0) satisfies: -1.0×10 -3 ≤C0= ≤1.0×10 -3 ； wherein L0a is the optical power of the equivalent lens (L0a), L0b is the optical power of the second refractive portion (L0b);v a V0a is the Abbe number of the equivalent lens (L0a),v b V0b is the Abbe number of the second refractive portion (L0b); d0 is the distance from the image-side principal plane of the equivalent lens (L0a) to the object-side principal plane of the second refractive portion (L0b) along the optical axis of the optical lens; The density p of the main body portion (101) satisfies: p < 3.92 g / cm 3 .

2. The optical lens according to claim 1, wherein The chromatic aberration coefficient C0 of the front lens group (G0) satisfies: -3.4×10 -4 ≤C0≤3.4×10 -4 ； or -2.5 x 10 -4 ≤ C0≤ 2.5 x 10 -4 ; or -1.5 x 10 -4 ≤ C0≤ 1.5 x 10 -4 ; or -5.0 x 10 -5 ≤ Co ≤ 5.0 x 10 -5 .

3. The optical lens according to claim 1 or 2, wherein The effective focal length f of the equivalent lens (L0a) L0a The effective focal length f of the optical lens satisfies: 0.64 < f / f L0a ≤ 1.77; Or, 0.74 < f / f L0a ≤ 0.95; Or, 0.74 < f / f L0a ≤ 0.91 ; Or, 0.74 < f / f L0a ≤ 0.

87.

4. The optical lens according to any one of claims 1 to 3, wherein The effective focal length f of the equivalent lens (L0a) L0a The effective focal length f of the optical lens satisfies: 26 mm < f L0a ≤ 34 mm, 20 mm < f < 30 mm; or 26 mm < f L0a ≤ 48 mm, 20 mm < f < 47 mm; or 12.6 mm < f L0a ≤ 98.6 mm, 9.3 mm < f < 73 mm.

5. The optical lens according to any one of claims 1 to 4, wherein An effective focal length f of the front lens group (G0) g0 An effective focal length f of the optical lens satisfies: 0.21 < f / f g0 ≤ 0.52; Or, 0.35 < f / f g0 ≤ 0.52; Or, 0.35 < f / f g0 ≤ 0.47; Or, 0.35 < f / f g0 ≤ 0.

43.

6. The optical lens according to any one of claims 1 to 5, wherein An effective focal length f of the front lens group (G0) g0 An effective focal length f of the optical lens satisfies: 50 mm < f g0 ≤ 70 mm, 20 mm < f < 30 mm; or 50 mm < f g0 ≤ 158 mm, 20 mm < f < 47 mm; or 26.5 mm < f < 208.6 mm, 9.3 mm < f < 73 mm. g0 or 26.5 mm < f < 208.6 mm, 9.3 mm < f < 73 mm.

7. The optical lens according to any one of claims 1 to 6, wherein the refractive index n of the equivalent lens (L0a) a and the Abbe number v a the refractive index n of the second refractive portion (L0b) b and the Abbe number v a satisfies: n a ≠n b ;v a ≠v b .

8. The optical lens according to claim 7, wherein Abbe number v of the equivalent lens (L0a) a and refractive index n a Abbe number v of the second refractive portion (L0b) b and refractive index n b satisfies: v a > v b ; n a < n b ; Or, v a < v b ; n a > n b .

9. The optical lens according to claim 7 or 8, wherein Abbe number v of the equivalent lens (L0a) a Abbe number v of the second refractive portion (L0b) b satisfies: 34 < v a ≤ 83, 25 < v b ≤ 55; or 34 < v a ≤ 95, 25 < v b ≤ 71; or 23 < v a ≤ 95, 23 < v b ≤ 95.

10. The optical lens according to any one of claims 7 to 9, wherein The refractive index n of the equivalent lens (L0a) a The refractive index n of the second refractive portion (L0b) b Satisfies: 1.42 < n a ≤ 1.75, 1.56 < n b ≤ 1.81; or 1.42 < n a ≤ 1.59, 1.56 < n b ≤ 1.75; or 1.42 < n a ≤ 1.84, 1.42 < n b ≤ 1.

84.

11. The optical lens according to any one of claims 1 to 10, wherein At least a part of the object side surface of the equivalent lens (L0a) is a convex surface (St) that is curved toward the object side of the equivalent lens (L0a) so that the focal power of the equivalent lens (L0a) is positive; At least a part of the image side surface of the second refractive part (L0b) is a concave surface (Sa) that is curved toward the object side of the second refractive part (L0b) so that the focal power of the second refractive part (L0b) is negative.

12. The optical lens according to claim 11, wherein The radius of curvature r of the convex surface (St) at the position of the optical axis of the optical lens a satisfies: 12.9 mm < r a ≤ 37.0 mm; Or, 9.5 mm < r a ≤ 155 mm.

13. The optical lens according to claim 11 or 12, characterized in that, at least one of the convex surface (St) and the concave surface (Sa) is aspherical; or, both the convex surface (St) and the concave surface (Sa) are aspherical or spherical.

14. The optical lens according to any one of claims 11 to 13, characterized in that, a chromatic aberration coefficient C0 of the front lens group (G0), an Abbe number v of the equivalent lens (L0a) a and a refractive index n a , an Abbe number v of the second refractive portion (L0b) b and a refractive index n b , a radius of curvature r of the convex surface (St) at a position of an optical axis of the optical lens a , a radius of curvature r of the concave surface (Sa) at a position of an optical axis of the optical lens b , a thickness d of the equivalent lens (L0a) at a position of an optical axis of the optical lens ap , a thickness d of the second refractive portion (L0b) at a position of an optical axis of the optical lens b satisfy: -3.4×10 -4 ≤C0= ≤3.4×10 -4 。 15. The optical lens according to any one of claims 1 to 14, characterized in that, The thickness d of the first refractive portion (102) at the position of the optical axis of the optical lens a The thickness d of the second refractive portion (L0b) at the position of the optical axis of the optical lens b The thickness d of the main body portion (101) at the position of the optical axis of the optical lens p satisfies: 1.8 mm < d a ≤ 2.5 mm, 0.89 mm < d b ≤ 1.06 mm, 7.7 mm < d p ≤ 9.9 mm; or 1.8 mm < d < 2.8 mm a ≤ 2.8 mm, 0.54 mm < d < 1.06 mm b ≤ 1.06 mm, 7.7 mm < d < 9.5 mm p ≤ 12.8 mm.

16. The optical lens according to any one of claims 1 to 15, characterized in that, the main body (101) comprises a reflection prism (1); the first refractive part (102) and the second refractive part (L0b) are both lenses; the image-side surface of the first refractive part (102) is in close contact with the entrance surface (11) of the reflection prism (1); the object-side surface of the second refractive part (L0b) is in close contact with the exit surface (12) of the reflection prism (1); or, the front lens group (G0) comprises a reflection prism (1) which is integrally formed, the first refractive part (102) and the main body (101) are respectively a part of the reflection prism (1); the main body (101) comprises the reflection surface (13) of the reflection prism (1); the first refractive part (102) comprises the entrance surface (11) of the reflection prism (1); the second refractive part (L0b) is a lens, and the object-side surface of the second refractive part (L0b) is in close contact with the exit surface (12) of the reflection prism (1).

17. The optical lens according to any one of claims 1 to 6, 11 to 15, characterized in that, the front lens group (G0) comprises a reflection prism (1) which is integrally formed, the first refractive part (102), the second refractive part (L0b) and the main body (101) are respectively a part of the reflection prism (1); the main body (101) comprises the reflection surface (13) of the reflection prism (1); the first refractive part (102) comprises the entrance surface (11) of the reflection prism (1); the second refractive part (L0b) comprises the exit surface (12) of the reflection prism (1).

18. The optical lens according to claim 16 or 17, characterized in that, The density p of the reflecting prism (1) p satisfies: ρ p ≤ 3.2 g / cm 3 .

19. The optical lens according to any one of claims 1 to 18, characterized in that, the material of the first refractive part (102) and the second refractive part (L0b) is one of glass and cyclic olefin copolymer.

20. The optical lens according to any one of claims 1 to 19, characterized in that, the rear lens group (G10) comprises a first lens group (G1) and a second lens group (G2) located on the image side of the first lens group (G1); the first lens group (G1) has positive refractive power, and the second lens group (G2) has negative refractive power.

21. The optical lens according to claim 20, characterized in that, The first lens group (G1) is a focusing lens group and is movable along an optical axis of the first lens group (G1) relative to the second lens group (G2); an effective focal length f of the front lens group (G0) g0 a combined focal length f of the front lens group (G0) and the first lens group (G1) g01 an effective focal length f of the optical lens, a first power distribution coefficient a, a second power distribution coefficient β, and a focus stroke compression ratio ξ satisfy: 1.15 < ξ = (1 - β 2 )α 2 ≤ 1.56; or, 1.15 < ξ = (1 - β 2 )α 2 ≤ 1.65; or, 1.15 < ξ = (1 - β 2 )α 2 ≤ 2.2; wherein a = f / f g01 ; β = f g01 / f g0 .

22. The optical lens according to claim 20 or 21, characterized in that, The first lens group (G1) has four lenses, and in a direction from an object side to an image side, the four lenses of the first lens group (G1) are in order a positive lens, a negative lens, a positive lens, and a positive lens. The second lens group (G2) has two lenses, and in a direction from an object side to an image side, the two lenses of the second lens group (G2) are in order a positive lens and a negative lens; or the second lens group (G2) has four lenses, and in a direction from an object side to an image side, the four lenses of the second lens group (G2) are in order a negative lens, a negative lens, a positive lens, and a negative lens.

23. An image capture module comprising: The camera module (400) according to claim 23, characterized in that the camera module (400) is mounted in the housing (500).

24. An electronic device, comprising: The camera module (400) according to claim 23, characterized in that the camera module (400) is mounted in the housing (500).

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