Imaging lens, camera module and electronic device

Abstract

Imaging lens (10) comprising the following: a plurality of lens elements (12, 13, 14) arranged sequentially along a beam path from an object side to an image side, wherein a central axis (AL) of the imaging objective (10) passes through a center of each of the plurality of lens elements (12, 13, 14), the plurality of lens elements (12, 13, 14) includes a center-shielding lens element (12), and the center-shielding lens element (12) comprises: a first optical surface (121), wherein the central axis (AL) passes through the first optical surface (121); and a second optical surface (122) which is arranged opposite the first optical surface (121); the second optical surface (122) comprises: a center-shielding area (RG1), wherein the central axis (AL) passes through the center-shielding area (RG1) and the center-shielding area (RG1) comprises a light-shielding layer (L1); and an optical transmission area (RG2) that is adjacent to and surrounds the center-shielding area (RG1); wherein an inner side (S1) and an outer side (S2) of the center-shielding area (RG1) both have properties of low reflectivity.

Description

BACKGROUND Subject area

[0001] The present disclosure relates to an imaging lens, a camera module and an electronic device, in particular an imaging lens and a camera module that can be used in an electronic device. Description of related technology

[0002] With the advancement of semiconductor manufacturing technology, the performance of image sensors has improved, and their pixel size has decreased. Therefore, high image quality is now one of the essential features of an imaging lens. Furthermore, due to rapid technological advancements, smartphones equipped with imaging lenses are becoming increasingly multifunctional for various applications, which has raised the bar for the functionality of these lenses.

[0003] With the increasing demands of photography, imaging lenses must adapt to ever harsher environmental conditions. In conventional technologies, the glare phenomenon, which occurs when light is reflected from an optical surface within a lens element, often leads to a degradation of image quality. Typically, such glare can only be suppressed by limited means, such as coatings. However, these methods suffer from problems such as limited design flexibility and inconsistent effectiveness, making it difficult to eliminate glare caused by internal reflections and thus limiting the overall performance of the optical system. Accordingly, improving the shielding configuration of imaging lenses to address the problem of glare caused by internal reflections has become a major focus in the relevant fields. SUMMARY

[0004] According to one aspect of the present disclosure, an imaging lens comprises a plurality of lens elements arranged sequentially along a beam path from an object side to an image side, with a central axis of the imaging lens passing through the center of each of the plurality of lens elements. The plurality of lens elements includes a center-shielding lens element, and the center-shielding lens element comprises a first optical surface and a second optical surface. The central axis passes through the first optical surface, and the second optical surface is arranged opposite the first optical surface. The second optical surface comprises a center-shielding region and an optical transmission region. The central axis passes through the center-shielding region, and the center-shielding region comprises a light-shielding layer.The optical transmission area is located adjacent to and surrounds the center-shielding area. Furthermore, both the inner and outer surfaces of the center-shielding area exhibit low reflectivity.

[0005] According to another aspect of the present disclosure, an imaging objective comprises a plurality of lens elements arranged sequentially along a beam path from an object side to an image side, and a central axis of the imaging objective passes through the center of each of the plurality of lens elements. The plurality of lens elements includes a center-shielding lens element, and the center-shielding lens element comprises a first optical surface and a second optical surface. The central axis passes through the first optical surface, and the second optical surface is arranged opposite the first optical surface. The second optical surface comprises a center-shielding region and an optical transmission region. The central axis passes through the center-shielding region, and the center-shielding region comprises a light-shielding layer.The optical transmission area is located adjacent to and surrounding the center-shielding area. Furthermore, a matte structure is provided on the center-shielding area, and at least part of the light-shielding layer is located on this matte structure.

[0006] According to another aspect of the present disclosure, a camera module comprises the aforementioned imaging lens and an image sensor arranged on an image surface of the imaging lens.

[0007] According to another aspect of the present disclosure, an electronic device comprises the aforementioned camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The disclosure can be better understood by reading the following detailed description of the embodiments with reference to the accompanying drawings: Fig. Figure 1 is a cross-sectional view of a camera module according to the first embodiment of the present disclosure; Fig. Figure 2 is a cross-sectional view of a center-shielding lens element in the imaging lens of the camera module. Fig. 1; Fig. Figure 3 is an enlarged view of the EL3 area in Fig. 2; Fig. Figure 4 is a projection view of the center-shielding lens element made of Fig. 2 in a direction perpendicular to a central axis; Fig. Figure 5 is an enlarged view of the EL5 area in Fig. 4; Fig. Figure 6 is a cross-sectional view of a camera module according to the second embodiment of the present disclosure; Fig. Figure 7 is a cross-sectional view of a center-shielding lens element in the imaging lens of the camera module. Fig. 6; Fig. Figure 8 is an enlarged view of the EL8 area. Fig. 7; Fig. Figure 9 is a projection view of the center-shielding lens element made of Fig. 7 in a direction perpendicular to a central axis; Fig. 10 is an enlarged view of the EL10 area in Fig. 9; Fig. Figure 11 is a cross-sectional view of a camera module according to the 3rd embodiment of the present disclosure; Fig. Figure 12 is a cross-sectional view of a center-shielding lens element in the imaging lens of the camera module. Fig. 11; Fig. Figure 13 is an enlarged view of the EL13 area in Fig. 12; Fig. Figure 14 is a projection view of the center-shielding lens element made of Fig. 12 in a direction perpendicular to a central axis; Fig. Figure 15 is an enlarged perspective view of the EL15 area in Fig. 14; Fig. Figure 16 is an enlarged perspective view of a matte structure according to a further embodiment of the present disclosure; Fig. Figure 17 is an enlarged perspective view of a matte structure according to a further embodiment of the present disclosure; Fig. Figure 18 is a perspective view of an electronic device according to the 4th embodiment of the present disclosure; Fig. Figure 19 is another perspective view of the electronic device in Fig. 18; Fig. Figure 20 is a representation of an image captured by an ultra-wide-angle camera module; Fig. 21 is a representation of an image captured by a high-pixel camera module; Fig. Figure 22 is a representation of an image taken by a telephoto camera module; Fig. Figure 23 is a perspective view of an electronic device according to the 5th embodiment of the present disclosure; Fig. Figure 24 is a perspective view of an electronic device according to the 6th embodiment of the present disclosure; Fig. 25 is a side view of the electronic device made of Fig. 24; and Fig. 26 is a top view of the electronic device made of Fig. 24. DETAILED DESCRIPTION

[0009] The following detailed description presents numerous specific details to enable a comprehensive understanding of the disclosed embodiments. However, it is obvious that one or more embodiments can also be implemented without these specific details. In other cases, known structures and devices are shown schematically to simplify the drawing.

[0010] The present disclosure relates to an imaging lens. The imaging lens comprises a plurality of lens elements arranged sequentially along a beam path from an object side to an image side, and a central axis of the imaging lens passes through the center of each of the plurality of lens elements. The plurality of lens elements includes a center-shielding lens element, and the center-shielding lens element comprises a first optical surface and a second optical surface. Furthermore, the central axis passes through the first optical surface, and the second optical surface is arranged opposite the first optical surface. In addition, the center-shielding lens element can be a glass lens element or a plastic lens element, but the present disclosure is not limited to specific types of materials.

[0011] The second optical surface comprises a center-shielding region and an optical transmission region. The central axis passes through the center-shielding region, and the center-shielding region includes a light-shielding layer. Furthermore, the light-shielding layer can be made of a black material to suppress the penetration of unwanted light into subsequent optical elements, but the present disclosure is not limited thereto. See, for example, [reference to relevant section]. Fig. 2 and Fig. Figure 3 shows schematic views of the center-shielding area and the light-shielding layer therein according to the first embodiment of the present disclosure. It should be noted that in the drawings of the present disclosure, the light-shielding layer shown is merely a schematic representation of its arrangement, and the actual thickness and material properties are not limited to the configurations shown in the drawings.

[0012] The optical transmission area is located adjacent to and surrounding the center-shielding area, allowing the imaging light to pass through the optical transmission area and subsequently through the entire lens system. The imaging light path travels through the first optical surface and the second optical surface, ultimately forming an image on an image surface of the imaging lens.

[0013] According to the imaging lens described in the present disclosure, by providing a light-shielding layer in the center of the lens element, the glare caused by reflections on the central surface of the lens element can be eliminated while maintaining the optical image quality, thereby improving the overall optical performance.

[0014] In one aspect, both the inside and outside of the center-shielding region exhibit low reflectivity. The inside of the center-shielding region refers to the center-shielding region as seen from the first optical surface, while the outside of the center-shielding region refers to the center-shielding region as seen from the second optical surface, and the outside can further be a surface of the light-shielding layer. The property of low reflectivity can be defined as a reflectance of less than 30%. In some aspects, the reflectance can further be less than 15%. In other aspects, the reflectance can further be less than 5%.The low reflectivity of the inner surface of the center-shielding area refers to a reflectance of less than 30% measured from the first optical surface. Therefore, glare caused by reflections from the inner surfaces of the lens element is eliminated, thus preserving image quality and overall optical performance. Similarly, the low reflectivity of the outer surface of the center-shielding area refers to a reflectance of less than 30% measured from the second optical surface. Therefore, glare caused by reflections between the center-shielding lens element and other optical surfaces is eliminated, further improving optical quality.

[0015] In one configuration, a matte structure can be provided on the central shielding area, and at least part of the light-shielding layer can be arranged on the matte structure. This is advantageous for reducing reflections and improving the adhesion of the light-shielding layer.

[0016] If the number of the plurality of lens elements (i.e., the total number of lens elements in the imaging objective) is N, and the number of lens elements among the plurality of lens elements arranged on one image side of the center-shielding lens element is M, then the following condition can be satisfied: N × 0.5 ≤ M. Therefore, it is advantageous to reduce the influence of the center-shielding area on the imaging light and thereby maintain optical quality.

[0017] The center-shielding lens element can be the lens element that is closest to the object face among the multitude of lens elements. Therefore, it is advantageous to reduce the probability of non-imaging light entering other lens elements, thereby improving the overall optical quality.

[0018] According to the present disclosure, the imaging lens can further comprise a reflective element, and the center-shielding lens element can be arranged on an object side of the reflective element. Therefore, it is advantageous to effectively optimize the distribution of the light entering the reflective element and thereby reduce the risk of glare caused by the reflective element.

[0019] The reflective element can comprise a multitude of reflective surfaces. Therefore, it is advantageous to achieve a beam path deflection effect through multiple reflections, effectively minimizing the overall size of the imaging lens and increasing the flexibility of the system design. Furthermore, there can be three or more reflective surfaces.

[0020] The first optical surface can be located on the object side of the center-shielding lens element, and the second optical surface can be located on the image side of the center-shielding lens element. Therefore, it is advantageous for the incident light path to be optimized first via the first optical surface, resulting in optimal imaging performance and light-shielding effects.

[0021] The first optical surface can comprise an object-side effective optical area, and the optical transmission area of ​​the second optical surface can comprise an image-side effective optical area. Furthermore, the image-side effective optical area can be located adjacent to the center-shielding area, and the beam path passes sequentially through the object-side effective optical area and the image-side effective optical area.Furthermore, in a direction parallel to the central axis, if the maximum distance from a position of the first optical surface traversed by the central axis to an outer edge of the object-side effective optical area furthest from the central axis is SL1, and the maximum distance from a position of the second optical surface traversed by the central axis to an outer edge of the image-side effective optical area furthest from the central axis is SL2, then the following condition can be satisfied: 0.04 ≤ SL2 / SL1 ≤ 0.35. Therefore, this is advantageous for improving light focusing quality, thereby reducing the influence of the shielding area on imaging. Additionally, the following condition can also be satisfied: 0.05 ≤ SL2 / SL1 ≤ 0.3. Furthermore, the following condition can also be satisfied: 0.06 ≤ SL2 / SL1 ≤ 0.25. See [reference]. Fig. 2, which shows a schematic view of SL1 and SL2 according to the 1st embodiment of the present disclosure.

[0022] The light-shielding layer can comprise a plurality of protruding edges arranged adjacent to the optical transmission area. The protruding edges can be arranged sequentially around the central axis, and each protruding edge can taper gradually away from the central axis. Furthermore, the shape of the protruding edges can include arcuate, conical, acute-angled, or obtuse-angled forms, although this disclosure is not limited to such shapes. In addition, the protruding edges can be connected to one another via arcuate transitions.

[0023] The matte structure can be applied to a surface of the center-shielding area, and this matte structure can be rougher than the surface of the optical transmission area. If the difference in surface roughness between the matte structure and the surface of the optical transmission area is ΔR, the following condition can be met: Ra 0.1 µm ≤ ΔR ≤ Ra 7.0 µm, where Ra represents the arithmetic mean roughness. This is advantageous for further reducing reflection and improving the adhesion of the light-shielding layer. Furthermore, the following condition can also be met: Ra 0.12 µm ≤ ΔR ≤ Ra 6.0 µm. Additionally, the following condition can also be met: Ra 0.15 µm ≤ ΔR ≤ Ra 5.0 µm.

[0024] In one configuration, the matte structure can comprise a variety of protruding structures arranged sequentially around the central axis. Providing these protruding structures can further enhance the low reflectivity effect and improve the adhesion of the light-blocking layer. Furthermore, the protruding structures can be arranged sequentially in a circumferential direction relative to the central axis or in a direction perpendicular to the central axis, thus forming a central-axis-based arrangement pattern.

[0025] The center-shielding area can comprise a wall surface and a bottom surface. The wall surface extends from the side of the optical transmission area closest to the central axis towards the first optical surface, and the bottom surface is connected to the side of the wall surface furthest from the optical transmission area. Furthermore, the light-shielding layer can be arranged on both the wall surface and the bottom surface. Therefore, it is advantageous for the center-shielding area to be designed as a shell-shaped structure to increase the thickness of the light-shielding layer and thereby improve the light-shielding performance.

[0026] On a projection plane perpendicular to the central axis, if the maximum shielding width of the center-shielding area is defined as CL and the maximum outer diameter of the center-shielding lens element is defined as DL, the following condition can be met: 0.03 ≤ CL / DL ≤ 0.33. Therefore, it is advantageous to maintain a suitable balance between light transmission and light shielding, thus ensuring image quality while avoiding glare. Furthermore, the following condition can also be met: 0.04 ≤ CL / DL ≤ 0.3. Additionally, the following condition can also be met: 0.05 ≤ CL / DL ≤ 0.25. See [reference]. Fig. 4, which shows a schematic view of CL and DL according to the 1st embodiment of the present disclosure.

[0027] The center-shielding lens element can be a non-circular lens element and have at least one clipped edge, wherein the clipped edge is recessed towards the central axis. Therefore, the use of a non-circular lens element can contribute to reducing the size and weight of the imaging lens. Furthermore, the center-shielding lens element can have a single clipped edge or two opposing clipped edges, and the present disclosure is not limited to the number of clipped edges.

[0028] On a projection plane perpendicular to the central axis, if a minimum distance between the clipped edge and the central axis is defined as ND and the maximum outer diameter of the center-shielding lens element is defined as DL, the following condition can be met: 0.49 ≤ ND×2 / DL ≤ 0.9. Therefore, it is advantageous to prevent excessive shielding, which could lead to a deterioration of image quality. Furthermore, the following condition can also be met: 0.55 ≤ ND×2 / DL ≤ 0.85. Additionally, the following condition can also be met: 0.6 ≤ ND×2 / DL ≤ 0.8. It should be noted that the center of the maximum outer diameter must be aligned with the central axis. See [reference]. Fig. 9, which shows a schematic view of ND and DL according to the 2nd embodiment of the present disclosure.

[0029] On a projection plane perpendicular to the central axis, if the maximum shielding width of the center-shielding area is defined as CL and the minimum distance between the clipped edge and the central axis is defined as ND, the following condition can be satisfied: 0.04 ≤ CL / (ND×2) ≤ 0.45. Therefore, it is advantageous to prevent excessive shielding, which could lead to a deterioration of image quality. Furthermore, the following condition can also be satisfied: 0.05 ≤ CL / (ND×2) ≤ 0.4. Additionally, the following condition can also be satisfied: 0.06 ≤ CL / (ND×2) ≤ 0.3. See [reference]. Fig. 9, which shows a schematic view of CL and ND according to the 2nd embodiment of the present disclosure.

[0030] If the field of view (FOV) of the imaging lens is 6 degrees ≤ 65 degrees, the following condition can be met. Therefore, it is advantageous to reduce the influence of the light-blocking layer on the imaging light quality and thereby improve the overall optical quality. Furthermore, the following condition can also be met: 8 degrees ≤ 55 degrees. Additionally, the following condition can also be met: 10 degrees ≤ 45 degrees. See [reference]. Fig. 1, which shows a schematic view of FOV according to the 1st embodiment of the present disclosure.

[0031] The optical transmission area of ​​the second optical surface of the center-shielding lens element can include the image-side effective optical area located adjacent to the center-shielding area, and the beam path passes through the image-side effective optical area. Furthermore, if there is a minimum distance ET between the outer edge of the image-side effective optical area furthest from the central axis and the first optical surface, and a central thickness of the center-shielding lens element, defined by the central axis passing through the center of the center-shielding lens element, is CT, then the following condition can be satisfied: 0.13 ≤ ET / CT ≤ 0.95. Therefore, this is advantageous for controlling the reflection direction of non-imaging light, effectively suppressing glare. Additionally, the following condition can also be satisfied: 0.15 ≤ ET / CT ≤ 0.8.Furthermore, the following condition can also be met: 0.2 ≤ ET / CT ≤ 0.7. Additionally, the center-shielding lens element can be a positive lens element. See . Fig. 2, which shows a schematic view of ET and CT according to the 1st embodiment of the present disclosure.

[0032] According to the present disclosure, the imaging objective can further comprise a tube, and the center-shielding lens element is arranged on the tube. The tube includes a minimum through-hole, and the central axis passes through the minimum through-hole. Furthermore, if, on a projection plane perpendicular to the central axis, the maximum shielding width of the center-shielding area is defined as CL and a diameter of the minimum through-hole is defined as BD, the following condition can be satisfied: 0.03 ≤ CL / BD ≤ 0.52. Therefore, it is advantageous to adapt the size of the light-shielding layer to the minimum through-hole in order to improve the shielding quality and ensure that the imaging objective receives an optimal amount of incident light. In addition, the following condition can also be satisfied: 0.04 ≤ CL / BD ≤ 0.45.Furthermore, the following condition can also be met: 0.05 ≤ CL / BD ≤ 0.35. See . Fig. 1 and Fig. 4, which show schematic views of BD and CL according to the 1st embodiment of the present disclosure.

[0033] The plurality of lens elements includes a rearmost lens element, which is the lens element closest to the image side among the plurality of lens elements. Furthermore, if, on a projection plane perpendicular to the central axis, the rearmost lens element's outer diameter is defined as DI and the maximum outer diameter of the center-shielding lens element is defined as DL, the following condition can be satisfied: 0.6 ≤ DI / DL ≤ 1.4. Therefore, it is advantageous to match the size of the rearmost lens element to the size of the center-shielding lens element to improve image quality. Additionally, the following condition can also be satisfied: 0.65 ≤ DI / DL ≤ 1.2. Furthermore, the following condition can also be satisfied: 0.7 ≤ DI / DL ≤ 1.1. See [reference]. Fig. 1 and Fig. 4, which show schematic views of DI and DL according to the 1st embodiment of the present disclosure.

[0034] The second optical surface of the center-shielding lens element can further comprise a peripheral shielding region located on the side of the optical transmission area furthest from the center-shielding region. By further arranging the light-shielding layer on the peripheral shielding region, the imaging light passing through the center-shielding lens element can be optimized, and glare from non-imaging light passing through the peripheral shielding region can be prevented. In addition, the peripheral shielding region can also comprise a plurality of protruding edges arranged sequentially around the central axis, each of which can gradually taper towards the center-shielding region.

[0035] The multiple lens elements can comprise a first lens group and a second lens group, with the second lens group located on the image side of the first lens group and each containing at least one lens element. Furthermore, the center-shielding lens element can be located within the first lens group, and the axial distance between the first and second lens groups is variable. Therefore, the multi-lens-group configuration can reduce the movement path of the light-shielding layer along the central axis, thereby optimizing optical quality. In one configuration, the second lens group is movable along the direction of the central axis. Therefore, optical functions such as focusing and zooming can be achieved by changing the distance between the second and first lens groups.

[0036] According to the present disclosure, a camera module is provided. The camera module comprises an image sensor and the aforementioned imaging lens, wherein the image sensor is arranged on the image surface of the imaging lens.

[0037] According to the present disclosure, an electronic device is provided. The electronic device comprises the aforementioned camera module.

[0038] According to the present disclosure, the aforementioned features and conditions can be used in numerous combinations to achieve corresponding effects.

[0039] According to the above description of the present disclosure, the following specific embodiments are also provided. 1. Design

[0040] See Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. 5. Fig. Figure 1 is a cross-sectional view of a camera module according to the first embodiment of the present disclosure. Fig. Figure 2 is a cross-sectional view of a center-shielding lens element in the imaging lens of the camera module. Fig. 1, Fig. Figure 3 is an enlarged view of the EL3 area in Fig. 2, Fig. Figure 4 is a projection view of the center-shielding lens element made of Fig. 2 in a direction perpendicular to a central axis, and Fig. Figure 5 is an enlarged view of the EL5 area in Fig. 4.

[0041] In this embodiment, a camera module 1 is provided. The camera module 1 comprises an imaging lens 10 and an image sensor IS. The imaging lens 10 comprises a tube 11, a plurality of lens elements 12, 13 and 14, a filter FT and an image surface IMG. The tube 11 includes a minimal through-hole (the reference numeral of which is omitted, but which refers to the one formed by the Fig. The parameter BD shown in Figure 1 can be referenced at the specified location), and a central axis AL of the imaging lens 10 passes through the minimum through-hole. The lens elements 12, 13, and 14 are arranged on the tube 11 and sequentially along a beam path from one object side to one image side, and the central axis AL passes through the center of each of the lens elements 12, 13, and 14. The filter FT is arranged between the lens elements 12, 13, and 14 and the image surface IMG, and the image sensor IS is arranged on the image surface IMG.

[0042] The lens elements 12, 13, and 14 comprise a center-shielding lens element 12 and a rearmost lens element 14. The center-shielding lens element 12 is the lens element closest to the object side among the lens elements 12, 13, and 14, and the rearmost lens element 14 is the lens element closest to the image side among the lens elements 12, 13, and 14. Furthermore, the center-shielding lens element 12 is a positive lens element.

[0043] The center-shielding lens element 12 comprises a first optical surface 121 and a second optical surface 122. The central axis AL passes through the first optical surface 121, and the second optical surface 122 is arranged opposite the first optical surface 121. Furthermore, the first optical surface 121 is located on an object side of the center-shielding lens element 12, and the second optical surface 122 is located on an image side of the center-shielding lens element 12. In other words, the first optical surface 121 can be an object-side surface of the center-shielding lens element 12, and the second optical surface 122 can be an image-side surface of the center-shielding lens element 12.The beam path for imaging runs sequentially through the first optical surface 121 and the second optical surface 122, then through the lens elements 13 and 14 and the filter FT, which is located on the image side of the center-shielding lens element 12, and finally produces an image on the image surface IMG.

[0044] The second optical surface 122 comprises a center-shielding region RG1, an optical transmission region RG2, and a peripheral shielding region RG3. The central axis AL passes through the center-shielding region RG1, and the center-shielding region RG1 includes a light-shielding layer L1. The optical transmission region RG2 is adjacent to and surrounds the center-shielding region RG1. The peripheral shielding region RG3 is located on the side of the optical transmission region RG2 that is furthest from the center-shielding region RG1.

[0045] As in Fig. 4 and Fig. As shown in Figure 5, the light-shielding layer L1 comprises a plurality of protruding edges PEL1 arranged adjacent to the optical transmission area RG2. The protruding edges PEL1 are arranged sequentially around the central axis AL, and each protruding edge PEL1 gradually tapers away from the central axis AL. In this embodiment, the shape of the protruding edges PEL1 is arc-shaped, and the protruding edges PEL1 are connected to each other via arc-shaped transitions.

[0046] As in Fig. As shown in Figure 4, the peripheral shielding area RG3 comprises a plurality of protruding edges PRG3 arranged sequentially around the central axis AL, and each of the protruding edges PRG3 gradually tapers to the center-shielding area RG1.

[0047] An inner surface S1 and an outer surface S2 of the center-shielding area RG1 both exhibit low reflectivity. Furthermore, the outer surface S2 of the center-shielding area RG1 is a surface of the light-shielding layer L1. In this embodiment, the reflectance of the inner surface S1 of the center-shielding area RG1 is less than 30%, and the reflectance of the outer surface S2 of the center-shielding area RG1 is also less than 30%.

[0048] As in Fig. 3 and Fig. As shown in Figure 5, a matte structure LS1 is provided on the center-shielding area RG1, the matte structure LS1 is recessed in the direction of the first optical surface 121 and at least a part of the light-shielding layer L1 is arranged on the matte structure LS1.

[0049] As in Fig. As shown in Figure 2, the first optical surface 121 comprises an object-side effective optical area 1211, and the optical transmission area RG2 of the second optical surface 122 comprises an image-side effective optical area 1222. Furthermore, the image-side effective optical area 1222 is arranged adjacent to the center-shielding area RG1, and the beam path passes sequentially through the object-side effective optical area 1211 and the image-side effective optical area 1222.Furthermore, in a direction parallel to the central axis AL, if a maximum distance from a position of the first optical surface 121 traversed by the central axis AL to an outer edge of the object-side effective optical area 1211 furthest from the central axis AL is SL1, and a maximum distance from a position of the second optical surface 122 traversed by the central axis AL to an outer edge of the image-side effective optical area 1222 furthest from the central axis AL is SL2, the following conditions are satisfied: SL1 = 0.71 mm; SL2 = 0.08 mm; and SL2 / SL1 = 0.113.

[0050] As in Fig. 1 are shown when the number of lens elements 12, 13 and 14 is N and the number of lens elements 13 and 14 arranged on the image side of the center-shielding lens element 12 is M, the following conditions are met: N = 5; M = 4; and N × 0.5 ≤ M.

[0051] As in Fig. As shown in Figure 5, the matte structure LS1 is provided on a surface of the center-shielding region RG1, and the matte structure LS1 is rougher than a surface of the optical transmission region RG2. In this embodiment, the roughness of the matte structure LS1 of the center-shielding region RG1 is between Ra 0.3 µm and 0.5 µm, and the roughness of the optical transmission region RG2 is less than Ra 0.1 µm, where Ra represents the arithmetic mean roughness. Furthermore, if the difference in surface roughness between the matte structure LS1 and the surface of the optical transmission region RG2 is ΔR, the following conditions are met: Ra 0.1 µm ≤ ΔR ≤ Ra 7.0 µm.

[0052] As in Fig. As shown in Figure 4, on a projection plane perpendicular to the central axis AL, if a maximum shielding width of the center-shielding area RG1 is defined as CL and a maximum outer diameter of the center-shielding lens element 12 is defined as DL, the following conditions are met: CL = 0.70 mm; DL = 6.5 mm; and CL / DL = 0.108.

[0053] As in Fig. As shown in Figure 1, if the field of view of the imaging lens 10 is FOV, the following condition is met: FOV = 32.6 degrees. Furthermore, the field of view of the imaging lens 10 corresponds to a maximum image height of the image sensor IS (whose reference symbol is omitted, but which corresponds to the intersection point between the beam path and the image sensor IS, as shown in Figure 1). Fig. 1 shown).

[0054] As in Fig. Figure 2 shows that if a minimum distance between the outer edge of the image-side effective optical area 1222, which is furthest from the central axis AL, and the first optical surface 121 is ET, and a central thickness of the center-shielding lens element 12, defined by the central axis AL passing through a center of the center-shielding lens element 12, is CT, the following conditions are met: ET = 0.29 mm; CT = 1.08 mm; and ET / CT = 0.269.

[0055] As in Fig. 1 and Fig. As shown in Figure 4, on a projection plane perpendicular to the central axis AL, when the maximum shielding width of the center-shielding area RG1 is defined as CL and a through-hole diameter of the minimum through-hole is defined as BD, the following conditions are met: CL = 0.70 mm; BD = 4.58 mm; and CL / BD = 0.152.

[0056] As in Fig. 1 and Fig. As shown in Figure 4, on a projection plane perpendicular to the central axis AL, if a rearmost lens outer diameter of the rearmost lens element 14 is defined as DI and the maximum outer diameter of the center-shielding lens element 12 is defined as DL, the following conditions are met: DI = 5.2 mm; DL = 6.5 mm; and DI / DL = 0.8. 2. Design

[0057] See Fig. 6, Fig. 7, Fig. 8, Fig. 9 to Fig. 10. Fig. Figure 6 is a cross-sectional view of a camera module according to the second embodiment of the present disclosure. Fig. Figure 7 is a cross-sectional view of a center-shielding lens element in the imaging lens of the camera module. Fig. 6, Fig. Figure 8 is an enlarged view of the EL8 area in Fig. 7, Fig. Figure 9 is a projection view of the center-shielding lens element made of Fig. 7 in a direction perpendicular to a central axis, and Fig. 10 is an enlarged view of the EL10 area in Fig. 9.

[0058] In this embodiment, a camera module 2 is provided. The camera module 2 comprises an imaging lens 20 and an image sensor IS. The imaging lens 20 comprises a tube 21, a plurality of lens elements 29, 22, 23 and 24, a reflecting element 25, a filter FT and an image surface IMG. The tube 21 includes a minimal through-hole (the reference numeral of which is omitted, but which refers to the one formed by the Fig. The parameter BD shown in Figure 6 can be referenced at the specified location), and a central axis AL of the imaging lens 20 passes through the minimum through-hole. The lens elements 29, 22, 23, and 24 are arranged on the tube 21 and sequentially along a beam path from one object side to one image side, and the central axis AL passes through the center of each of the lens elements 29, 22, 23, and 24. The reflecting element 25 is arranged in the direction of the beam path between the lens elements 29, 22, 23, and 24 and the filter FT, the filter FT is arranged in the direction of the beam path between the reflecting element 25 and the image surface IMG, and the image sensor IS is arranged at the image surface IMG.

[0059] The lens elements 29, 22, 23, and 24 comprise a center-shielding lens element 22 and a rearmost lens element 24. The center-shielding lens element 22 is the second lens element, counting from the object side, below the lens elements 29, 22, 23, and 24, and the rearmost lens element 24 is the lens element closest to the image side below the lens elements 29, 22, 23, and 24. Furthermore, the center-shielding lens element 22 is a positive lens element and is located on an object side of the reflecting element 25. In this embodiment, the reflecting element 25 comprises three reflective surfaces 251, 252, and 253.

[0060] The center-shielding lens element 22 comprises a first optical surface 221 and a second optical surface 222. The central axis AL passes through the first optical surface 221, and the second optical surface 222 is arranged opposite the first optical surface 221. Furthermore, the first optical surface 221 is located on an object side of the center-shielding lens element 22, and the second optical surface 222 is located on an image side of the center-shielding lens element 22. In other words, the first optical surface 221 can be an object-side surface of the center-shielding lens element 22, and the second optical surface 222 can be an image-side surface of the center-shielding lens element 22.The beam path for imaging passes sequentially through the lens element 29, the first optical surface 221 and the second optical surface 222 of the center-shielding lens element 22, then passes through the lens elements 23 and 24, the reflecting element 25 and the filter FT, which are arranged on the image side of the center-shielding lens element 22, and finally produces an image on the image surface IMG.

[0061] The second optical surface 222 comprises a center-shielding region RG1 and an optical transmission region RG2. The central axis AL passes through the center-shielding region RG1, and the center-shielding region RG1 includes a light-shielding layer L1. The optical transmission region RG2 is located adjacent to and surrounds the center-shielding region RG1.

[0062] As in Fig. 9 and Fig. As shown in Figure 10, the light-shielding layer L1 comprises a plurality of protruding edges PEL1 arranged adjacent to the optical transmission area RG2; the protruding edges PEL1 are arranged sequentially around the central axis AL, and each of the protruding edges PEL1 gradually tapers away from the central axis AL. In this embodiment, the shape of the protruding edges PEL1 is acute-angled.

[0063] An inner surface S1 and an outer surface S2 of the center-shielding area RG1 both exhibit low reflectivity. Furthermore, the outer surface S2 of the center-shielding area RG1 is a surface of the light-shielding layer L1. In this embodiment, the reflectance of the inner surface S1 of the center-shielding area RG1 is less than 30%, and the reflectance of the outer surface S2 of the center-shielding area RG1 is also less than 30%.

[0064] As in Fig. 8 and Fig. As shown in Figure 10, a matte structure LS1 is provided on the center-shielding area RG1, and at least part of the light-shielding layer L1 is arranged on the matte structure LS1.

[0065] As in Fig. As shown in Figure 9, the center-shielding lens element 22 is a non-circular lens element and comprises two opposing clipped edges EG1, the clipped edges EG1 being recessed towards the central axis AL. Furthermore, the center-shielding lens element 22 is a plastic lens element having a gate conductor GT1 on its outer diameter, and the gate conductor GT1 is arranged on an edge region connecting the two clipped edges EG1.

[0066] As in Fig. As shown in Figure 7, the first optical surface 221 comprises an object-side effective optical area 2211, and the optical transmission area RG2 of the second optical surface 222 comprises an image-side effective optical area 2222. Furthermore, the image-side effective optical area 2222 is located adjacent to the center-shielding area RG1, and the beam path passes sequentially through the object-side effective optical area 2211 and the image-side effective optical area 2222.Furthermore, in a direction parallel to the central axis AL, if a maximum distance from a position of the first optical surface 221 traversed by the central axis AL to an outer edge of the object-side effective optical area 2211 furthest from the central axis AL is SL1, and a maximum distance from a position of the second optical surface 222 traversed by the central axis AL to an outer edge of the image-side effective optical area 2222 furthest from the central axis AL is SL2, the following conditions are met: SL1 = 0.21 mm; SL2 = 0.02 mm; and SL2 / SL1 = 0.095.

[0067] As in Fig. As shown in Figure 6, if the number of lens elements 22, 23 and 24 is N and the number of lens elements 23 and 24 arranged on one image side of the center-shielding lens element 22 is M, the following conditions are met: N = 5; M = 3; and N×0.5 ≤ M.

[0068] As in Fig. As shown in Figure 10, the matte structure LS1 is provided on a surface of the center-shielding region RG1, and the matte structure LS1 is rougher than a surface of the optical transmission region RG2. In this embodiment, the roughness of the matte structure LS1 of the center-shielding region RG1 is between Ra 2.8 µm and 3.5 µm, and the roughness of the optical transmission region RG2 is less than Ra 0.1 µm, where Ra represents the arithmetic mean roughness. Furthermore, if the difference in surface roughness between the matte structure LS1 and the surface of the optical transmission region RG2 is ΔR, the following conditions are met: Ra 0.1 µm ≤ ΔR ≤ Ra 7.0 µm.

[0069] As in Fig. As shown in Figure 9, on a projection plane perpendicular to the central axis AL, when a maximum shielding width of the center-shielding area RG1 is defined as CL and a maximum outer diameter of the center-shielding lens element 22 is defined as DL, the following conditions are met: CL = 1.02 mm; DL = 6.3 mm; and CL / DL = 0.162.

[0070] As in Fig. As shown in Figure 9, on a projection plane perpendicular to the central axis AL, if a minimum distance between the clipped edge EG1 and the central axis AL is defined as ND and the maximum outer diameter of the center-shielding lens element 22 is defined as DL, the following conditions are met: ND = 2.38 mm; DL = 6.3 mm; and ND × 2 / DL = 0.756. Furthermore, the center of the maximum outer diameter DL is aligned with the central axis AL.

[0071] As in Fig. As shown in Figure 9, on a projection plane perpendicular to the central axis AL, if the maximum shielding width of the center-shielding area RG1 is defined as CL and the minimum distance between the clipped edge EG1 and the central axis AL is defined as ND, the following conditions are met: CL = 1.02 mm; ND = 2.38 mm; and CL / (ND×2) = 0.214.

[0072] As in Fig. As shown in Figure 6, if the field of view of the imaging lens 20 is FOV, the following condition is met: FOV = 32.6 degrees. Furthermore, the field of view of the imaging lens 20 corresponds to a maximum image height of the image sensor IS (whose reference symbol is omitted, but which corresponds to the intersection point between the beam path and the image sensor IS, as shown in Figure 6). Fig. 6 shown).

[0073] As in Fig. Figure 7 shows that if a minimum distance between the outer edge of the image-side effective optical area 2222, which is furthest from the central axis AL, and the first optical surface 221 is ET, and a central thickness of the center-shielding lens element 22, defined by the central axis AL passing through a center of the center-shielding lens element 22, is CT, the following conditions are met: ET = 0.26 mm; CT = 0.46 mm; and ET / CT = 0.565.

[0074] As in Fig. 6 and Fig. As shown in Figure 9, on a projection plane perpendicular to the central axis AL, when the maximum shielding width of the center-shielding area RG1 is defined as CL and the through-hole diameter of the minimum through-hole is defined as BD, the following conditions are met: CL = 1.02 mm; BD = 3.92 mm; and CL / BD = 0.260.

[0075] As in Fig. 6 and Fig. As shown in Figure 9, on a projection plane perpendicular to the central axis AL, when a rearmost lens outer diameter of the rearmost lens element 24 is defined as DI and the maximum outer diameter of the center-shielding lens element 22 is defined as DL, the following conditions are met: DI = 5.2 mm; DL = 6.3 mm; and DI / DL = 0.825. 3. Design

[0076] See Fig. 11, Fig. 12, Fig. 13, Fig. 14 to Fig. 15. Fig. Figure 11 shows a cross-sectional view of a camera module according to the 3rd embodiment of the present disclosure, Fig. Figure 12 shows a cross-sectional view of a center-shielding lens element in the imaging lens of the camera module. Fig. 11, Fig. Figure 13 is an enlarged view of the EL13 area in Fig. 12, Fig. Figure 14 is a projection view of the center-shielding lens element made of Fig. 12 in a direction perpendicular to a central axis, and Fig. Figure 15 is an enlarged perspective view of the EL15 area in Fig. 14.

[0077] In this embodiment, a camera module 3 is provided. The camera module 3 comprises an imaging lens 30 and an image sensor IS. The imaging lens 30 comprises a tube 31, a plurality of lens elements 32, 33 and 34, two reflective elements 35 and 36, a filter FT and an image surface IMG. The tube 31 includes a minimal through-hole (the reference numeral of which is omitted, but which refers to the one formed by the Fig. The parameter BD shown in Figure 11 can be referenced at the specified location), and a central axis AL of the imaging lens 30 passes through the minimum through-hole. The lens elements 32, 33, and 34 are arranged on the tube 31 and sequentially along a beam path from one object side to one image side, and the central axis AL passes through the center of each of the lens elements 32, 33, and 34. The filter FT is arranged in the direction of the beam path between the lens elements 32, 33, and 34 and the image surface IMG, and the image sensor IS is arranged at the image surface IMG.

[0078] The lens elements 32, 33, and 34 comprise a center-shielding lens element 32 and a rearmost lens element 34. The center-shielding lens element 32 is the lens element closest to the object side among the lens elements 32, 33, and 34, and the rearmost lens element 34 is the lens element closest to the image side among the lens elements 32, 33, and 34. Furthermore, the center-shielding lens element 32 is a positive lens element.

[0079] The lens elements 32, 33, and 34 comprise a first lens group LG1 and a second lens group LG2. The second lens group LG2 is arranged on an image side of the first lens group LG1, and both the first lens group LG1 and the second lens group LG2 each comprise at least one lens element. Furthermore, the center-shielding lens element 32 is arranged in the first lens group LG1, and the axial distance between the first lens group LG1 and the second lens group LG2 is variable. In this embodiment, the second lens group LG2 is movable along the direction of the central axis AL.

[0080] The reflecting element 35 is arranged in the direction of the beam path between the first lens group LG1 and the second lens group LG2, and the reflecting element 36 is arranged in the direction of the beam path between the second lens group LG2 and the filter FT. Furthermore, the center-shielding lens element 32 is arranged on one object side of the reflecting element 35. In this embodiment, the reflecting element 35 comprises a reflective surface 351, and the reflecting element 36 comprises a reflective surface 361.

[0081] The center-shielding lens element 32 comprises a first optical surface 321 and a second optical surface 322. The central axis AL passes through the first optical surface 321, and the second optical surface 322 is arranged opposite the first optical surface 321. Furthermore, the first optical surface 321 is located on an object side of the center-shielding lens element 32, and the second optical surface 322 is located on an image side of the center-shielding lens element 32. In other words, the first optical surface 321 can be an object-side surface of the center-shielding lens element 32, and the second optical surface 322 can be an image-side surface of the center-shielding lens element 32.The beam path for imaging runs sequentially through the first lens group LG1, the first optical surface 321 and the second optical surface 322 of the center-shielding lens element 32 contained therein, then passes through the reflecting element 35, the second lens group LG2, the reflecting element 36 and the filter FT and finally produces an image on the image surface IMG.

[0082] The second optical surface 322 comprises a center-shielding region RG1 and an optical transmission region RG2. The central axis AL passes through the center-shielding region RG1, and the center-shielding region RG1 includes a light-shielding layer L1. The optical transmission region RG2 is located adjacent to and surrounds the center-shielding region RG1.

[0083] An inner surface S1 and an outer surface S2 of the center-shielding area RG1 both exhibit low reflectivity. Furthermore, the outer surface S2 of the central center-shielding area RG1 is a surface of the light-shielding layer L1. In this embodiment, the reflectance of the inner surface S1 of the center-shielding area RG1 is less than 30%, and the reflectance of the outer surface S2 of the center-shielding area RG1 is also less than 30%.

[0084] As in Fig. 13 and Fig. As shown in Figure 15, a matte structure LS1 is provided on the center-shielding area RG1, and at least a portion of the light-shielding layer L1 is arranged on the matte structure LS1. The matte structure LS1 comprises a plurality of projecting structures PT1, which are arranged sequentially based on the central axis AL. In this embodiment, the projecting structures PT1 are arranged sequentially in a circumferential direction relative to the central axis AL.

[0085] Furthermore, the center-shielding area RG1 includes, as in Fig. Figure 13 shows a wall surface SW1 and a lower surface BW1. The wall surface SW1 extends from a side of the optical transmission area RG2 closest to the central axis AL towards the first optical surface 321, and the lower surface BW1 is connected to a side of the wall surface SW1 furthest from the optical transmission area RG2. Furthermore, the light-shielding layer L1 is arranged on the wall surface SW1 and the lower surface BW1.

[0086] As in Fig. As shown in Figure 14, the center-shielding lens element 32 is a non-circular lens element and comprises two opposing clipped edges EG1, the clipped edges EG1 being recessed towards the central axis AL. Furthermore, the center-shielding lens element 32 is a plastic lens element having a gate conductor GT1 on its outer diameter, and the gate conductor GT1 is arranged on an edge region connecting the two clipped edges EG1.

[0087] As in Fig. As shown in Figure 12, the first optical surface 321 comprises an object-side effective optical area 3211, and the optical transmission area RG2 of the second optical surface 322 comprises an image-side effective optical area 3222. Furthermore, the image-side effective optical area 3222 is arranged adjacent to the center-shielding area RG1, and the beam path passes sequentially through the object-side effective optical area 3211 and the image-side effective optical area 3222.Furthermore, in a direction parallel to the central axis AL, if a maximum distance from a position of the first optical surface 321 traversed by the central axis AL to an outer edge of the object-side effective optical area 3211 furthest from the central axis AL is SL1, and a maximum distance from a position of the second optical surface 322 traversed by the central axis AL to an outer edge of the image-side effective optical area 3222 furthest from the central axis AL is SL2, the following conditions are met: SL1 = 0.52 mm; SL2 = 0.09 mm; and SL2 / SL1 = 0.173.

[0088] As in Fig. As shown in Figure 11, if the number of lens elements 32, 33 and 34 is N and the number of lens elements 33 and 34 arranged on the image side of the center-shielding lens element 32 is M, the following conditions are met: N = 8; M = 7; and N × 0.5 ≤ M.

[0089] As in Fig. As shown in Figure 14, on a projection plane perpendicular to the central axis AL, when a maximum shielding width of the center-shielding area RG1 is defined as CL and a maximum outer diameter of the center-shielding lens element 32 is defined as DL, the following conditions are met: CL = 0.56 mm; DL = 11.15 mm; and CL / DL = 0.05.

[0090] As in Fig. As shown in Figure 14, on a projection plane perpendicular to the central axis AL, if a minimum distance between the clipped edge EG1 and the central axis AL is ND and the maximum outer diameter of the center-shielding lens element 32 is defined as DL, the following conditions are met: ND = 3.59 mm; DL = 11.15 mm; and ND × 2 / DL = 0.644. Furthermore, the center of the maximum outer diameter DL is aligned with the central axis AL.

[0091] As in Fig. As shown in Figure 14, on a projection plane perpendicular to the central axis AL, when the maximum shielding width of the center-shielding area RG1 is defined as CL and the minimum distance between the clipped edge EG1 and the central axis AL is defined as ND, the following conditions are met: CL = 0.56 mm; ND = 3.59 mm; and CL / (ND×2) = 0.078.

[0092] As in Fig. As shown in Figure 11, if the field of view of the imaging lens 30 is FOV, the following condition is met: FOV = 13.6 degrees. Furthermore, the field of view of the imaging lens 30 corresponds to a maximum image height of the image sensor IS (whose reference symbol is omitted, but which corresponds to the intersection point between the beam path and the image sensor IS, as shown in Figure 11). Fig. 11 shown).

[0093] As in Fig. As shown in Figure 12, if a minimum distance between the outer edge of the image-side effective optical area 3222, which is furthest from the central axis AL, and the first optical surface 321 is ET, and a central thickness of the center-shielding lens element 32, defined by the central axis AL passing through a center of the center-shielding lens element 32, is CT, the following conditions are met: ET = 0.37 mm; CT = 0.97 mm; and ET / CT = 0.381.

[0094] As in Fig. 11 and Fig. As shown in Figure 14, on a projection plane perpendicular to the central axis AL, if a maximum shielding width of the center-shielding area RG1 is defined as CL and a through-hole diameter of the minimum through-hole is defined as BD, the following conditions are met: CL = 0.56 mm; BD = 10.14 mm; and CL / BD = 0.06.

[0095] As in Fig. 11 and Fig. As shown in Figure 14, on a projection plane perpendicular to the central axis AL, when a rearmost lens outer diameter of the rearmost lens element 34 is defined as DI and the maximum outer diameter of the center-shielding lens element 32 is defined as DL, the following conditions are met: DI = 10.5 mm; DL = 11.15 mm; and DI / DL = 0.942.

[0096] In this embodiment, as in Fig. Figure 15 shows the aforementioned structures PT1 arranged sequentially in the circumferential direction relative to the central axis AL, and the aforementioned structures PT1 extend radially from the central axis AL in a radial pattern, but the present disclosure is not limited thereto. See the Fig. 16 and Fig. 17, which represent enlarged perspective views of a matte structure according to other configurations of the present disclosure.

[0097] In the configuration of Fig. 16 are a plurality of projecting structures PT2 coaxial ring-shaped structures, and the projecting structure PT2 arranged on the outer circumference may have a greater projection height than the projecting structure PT2 arranged on the inside, but the present disclosure is not limited thereto.

[0098] In the configuration of Fig. 17. A plurality of the aforementioned structures PT3 are arranged sequentially based on the central axis AL to form an arrangement pattern which may be symmetrical with respect to the central axis AL, and the shape of each of the aforementioned structures PT3 is conical, but the present disclosure is not limited thereto. 4. Design

[0099] See Fig. 18 and Fig. 19. Fig. Figure 18 shows a perspective view of an electronic device according to the 4th embodiment of the present disclosure, and Fig. Figure 19 shows another perspective view of the electronic device. Fig. 18.

[0100] In this embodiment, the electronic device 400 is a smartphone comprising a plurality of camera modules 400a, 400b and 400c, a flash module 401, a focus assist module 402, an image signal processor 403, a display module (user interface) 404 and an image software processor (not shown).

[0101] These camera modules comprise an ultra-wide-angle camera module 400a, a high-pixel camera module 400b, and a telephoto camera module 400c. Furthermore, the telephoto camera module 400c comprises the imaging lens of the present disclosure and an image sensor (not shown), wherein the image sensor is arranged on the image surface of the imaging lens, although the present disclosure is not limited thereto. Each of the camera modules 400a and 400b may comprise the imaging lens of the present disclosure.

[0102] The image captured by the ultra-wide-angle camera module 400a has the property of showing multiple depicted objects. Fig. 20 is an image taken by the ultra-wide-angle camera module 400a.

[0103] The image captured by the 400b high-pixel camera module is characterized by high resolution and lower distortion, and the 400b high-pixel camera module can capture part of the image in Fig. Record 20. Fig. Figure 21 shows an image taken by the high-pixel camera module 400b.

[0104] The image captured by the 400c telephoto camera module is characterized by high optical magnification, and the 400c telephoto camera module can capture part of the image in Fig. 21. Fig. Figure 22 shows an image taken by the Tele camera module 400c.

[0105] When a user takes pictures of an object, the light rays are focused in the ultra-wide-angle camera module 400a, the high-resolution camera module 400b, or the telephoto camera module 400c to create images, and the flash module 401 is activated for additional light. The focus assist module 402 determines the object's distance to enable fast autofocus. The image signal processor 403 is designed to optimize the captured image to improve image quality and provide a zoom function. The light beam emitted by the focus assist module 402 can be either conventional infrared light or laser light.The 404 display module can include a touchscreen, and the user can interact with it to adjust the viewing angle and switch between different camera modules. The image software processor has several functions for image capture and processing. Alternatively, the user can capture images using a physical button. The image processed by the image software processor can be displayed on the 404 display module. 5. Design

[0106] See Fig. 23, which shows a perspective view of an electronic device according to the 5th embodiment of the present disclosure.

[0107] In this embodiment, the electronic device 500 is a smartphone comprising a camera module 500a, a camera module 500b, a camera module 500c, a camera module 500d, a camera module 500e, a camera module 500f, a camera module 500g, a camera module 500h, a camera module 500i, a flash module 501, an image signal processor, a display module, and an image software processor (not shown). The camera modules 500a, 500b, 500c, 500d, 500e, 500f, 500g, 500h, and 500i are arranged on the same side of the electronic device 500, while the display module is arranged on the opposite side of the electronic device 500.Furthermore, the camera modules 500a, 500b and 500c each comprise the imaging lens of the present disclosure and an image sensor (not shown), wherein the image sensor is arranged on the image surface of the imaging lens.

[0108] The 500a camera module is a telephoto camera module with beam deflection function, the 500b camera module is a telephoto camera module with beam deflection function, the 500c camera module is a telephoto camera module, the 500d camera module is a telephoto camera module, the 500e camera module is a wide-angle camera module, the 500f camera module is a wide-angle camera module, the 500g camera module is an ultra-wide-angle camera module, the 500h camera module is a ToF (Time of Flight) camera module, and the 500i camera module is an ultra-wide-angle camera module. In this embodiment, the camera module 500i, the camera module 500a, the camera module 500b, the camera module 500c, the camera module 500d, the camera module 500e, the camera module 500f and the camera module 500g have different fields of view, so that the electronic device can have 500 different magnification ratios to meet the requirement for an optical zoom function.Furthermore, camera module 500a and camera module 500b are telephoto camera modules with a light deflection element configuration. Additionally, camera module 500h can determine depth information of the imaged object. In this embodiment, the electronic device 500 comprises several camera modules 500a, 500b, 500c, 500d, 500e, 500f, 500g, 500h, and 500i, but the present disclosure is not limited to the number and arrangement of the camera modules. When a user takes pictures of an object, the light rays are focused in the camera module 500a, in the camera module 500b, in the camera module 500c, in the camera module 500d, in the camera module 500e, in the camera module 500f, in the camera module 500g, in the camera module 500h or in the camera module 500i to produce an image or images, and the flash module 501 is activated to provide additional light.Furthermore, the subsequent processes are carried out in a similar manner to the embodiments mentioned above, so the details in this regard are not specified again. 6. Design

[0109] See Fig. 24, Fig. 25 to Fig. 26. Fig. Figure 24 shows a perspective view of an electronic device according to the 6th embodiment of the present disclosure, Fig. 25 is a side view of the electronic device made of Fig. 24 and Fig. 26 is a top view of the electronic device made of Fig. 24.

[0110] In this embodiment, the electronic device 600 is a motor vehicle. The electronic device 600 comprises a plurality of vehicle camera modules 600a, and each camera module 600a comprises the imaging lens of the present disclosure and an image sensor arranged on the image surface of the imaging lens. The camera modules 600a can, for example, serve as panoramic vehicle cameras, dashboard cameras, and reversing cameras.

[0111] As in Fig. As shown in Figure 24, the 600a camera modules are arranged around the vehicle to capture images of its surroundings, which is advantageous for gathering external traffic information to enable an autopilot function. Furthermore, the image software processor can stitch these images together to create a panoramic view, allowing the driver to monitor every area around the vehicle, which is beneficial for parking and driving.

[0112] As in Fig. As shown in Figure 25, the 600a camera modules are, for example, arranged on the lower part of the side mirrors. The field of view of the 600a camera modules can be 40 degrees to 90 degrees to capture images in areas on the left and right lanes.

[0113] As in Fig. As shown in Figure 26, the 600a camera modules can, for example, also be arranged on the lower part of the side mirrors and inside the front and rear windscreens to provide the driver with information about the outside environment and also to offer more viewing angles to reduce blind spots and thereby improve driving safety.

[0114] The smartphones, panoramic vehicle cameras, dashboard cameras, and reversing cameras in the embodiments serve only as examples to illustrate the imaging lens and camera module of the present disclosure installed in an electronic device, and the present disclosure is not limited thereto. The imaging lens and camera module can optionally be used in optical systems with movable focus.Furthermore, the imaging lens and camera module are characterized by good aberration correction capabilities and high image quality, and can be used in 3D image acquisition (three-dimensional image acquisition) applications, for example in products such as digital cameras, mobile devices, digital tablets, smart TVs, network surveillance devices, multi-camera devices, image recognition systems, unmanned aerial vehicles, motion-sensitive input devices, portable devices and other electronic imaging devices.

[0115] The foregoing description has been provided for illustrative purposes with reference to specific embodiments. It should be noted that the present disclosure shows different data for the various embodiments; however, the data for the different embodiments are derived from experiments. The embodiments were selected and described to best illustrate the principles of the disclosure and their practical applications, so that other skilled persons may make the best possible use of the disclosure and the various embodiments with different modifications suitable for their respective intended uses. The embodiments shown above and the accompanying drawings are exemplary and are neither intended to be exhaustive nor to limit the scope of the present disclosure to the forms exactly disclosed. In view of the above teachings, many modifications and variations are possible.

Claims

Imaging objective (10) comprising: a plurality of lens elements (12, 13, 14) arranged sequentially along a beam path from an object side to an image side, wherein a central axis (AL) of the imaging objective (10) passes through a center of each of the plurality of lens elements (12, 13, 14), the plurality of lens elements (12, 13, 14) comprising a center-shielding lens element (12), and the center-shielding lens element (12) comprising: a first optical surface (121), wherein the central axis (AL) passes through the first optical surface (121); and a second optical surface (122) arranged opposite the first optical surface (121); wherein the second optical surface (122) comprises: a center-shielding region (RG1) wherein the central axis (AL) passes through the center-shielding region (RG1) and the center-shielding region (RG1) comprises a light-shielding layer (L1);and an optical transmission region (RG2) that is adjacent to and surrounds the center-shielding region (RG1); wherein an inner side (S1) and an outer side (S2) of the center-shielding region (RG1) both have low reflectivity properties. Imaging lens (10) according to claim 1, wherein a number of the plurality of lens elements (12, 13, 14) is N, a number of lens elements (13, 14) arranged on an image side of the center-shielding lens element (12) is M among the plurality of lens elements (12, 13, 14), and the following condition is satisfied: N × 0.5 ≤ M . Imaging lens (10) according to claim 2, wherein the central center-shielding lens element (12) is a lens element which is closest to the object side among the plurality of lens elements (12, 13, 14). Imaging lens (20) according to claim 1, further comprising a reflective element (25), wherein the center-shielding lens element (22) is arranged on an object side of the reflective element (25). Imaging lens (20) according to claim 4, wherein the reflective element (25) comprises a plurality of reflective surfaces (251, 252, 253). Imaging lens (10) according to claim 1, wherein the first optical surface (121) is arranged on an object side of the center-shielding lens element (12) and the second optical surface (122) is arranged on an image side of the center-shielding lens element (12). Imaging lens (10) according to claim 6, wherein the first optical surface (121) comprises an object-side effective optical area (1211), the optical transmission area (RG2) of the second optical surface (122) comprises an image-side effective optical area (1222), the image-side effective optical area (1222) is arranged adjacent to the center-shielding area (RG1), and the beam path passes sequentially through the object-side effective optical area (1211) and the image-side effective optical area (1222);and wherein, in a direction parallel to the central axis (AL), a maximum distance from a position of the first optical surface (121) through which the central axis (AL) passes to an outer edge of the object-side effective optical area (1211) furthest from the central axis (AL) is SL1, a maximum distance from a position of the second optical surface (122) through which the central axis (AL) passes to an outer edge of the image-side effective optical area (1222) furthest from the central axis (AL) is SL2, and the following condition is satisfied: 0.04 ≤ SL2 / SL1 ≤ 0.35 .; Imaging lens (10) according to claim 1, wherein the light-shielding layer (L1) comprises a plurality of protruding edges (PEL1) arranged adjacent to the optical transmission area (RG2), the plurality of protruding edges (PEL1) arranged sequentially around the central axis (AL), and each of the plurality of protruding edges (PEL1) gradually tapers away from the central axis (AL). Imaging lens (10) according to claim 1, wherein a matte structure (LS1) is provided on a surface of the center-shielding area (RG1) and the matte structure (LS1) is rougher than a surface of the optical transmission area (RG2); and wherein a difference in surface roughness between the matte structure (LS1) and the surface of the optical transmission area (RG2) is ΔR and the following condition is met: Ra 0.1 µm ≤ ΔR ≤ Ra 7.0 µm, where Ra represents an arithmetic mean roughness. Imaging lens (30) according to claim 1, wherein a matte structure (LS1) is provided on a surface of the center-shielding area (RG1) and the matte structure (LS1) comprises a plurality of protruding structures (PT1) arranged sequentially based on the central axis (AL). Imaging lens (30) according to claim 1, wherein the center-shielding area (RG1) comprises: a wall surface (SW1) extending from a side of the optical transmission area (RG2) closest to the central axis (AL) towards the first optical surface (121); and a lower surface (BW1) connected to a side of the wall surface (SW1) furthest from the optical transmission area (RG2); wherein the light-shielding layer (L1) is arranged on the wall surface (SW1) and the lower surface (BW1). Imaging lens (10) according to claim 1, wherein on a projection plane perpendicular to the central axis (AL) a maximum shielding width of the center-shielding area (RG1) is defined as CL, a maximum outer diameter of the center-shielding lens element (12) is defined as DL and the following condition is met: 0.03 ≤ CL / DL ≤ 0.33 . Imaging lens (20) according to claim 1, wherein the center-shielding lens element (22) is a non-circular lens element and comprises a clipped edge (EG1), and the clipped edge (EG1) is recessed towards the central axis (AL); and wherein, on a projection plane perpendicular to the central axis (AL), a minimum distance between the clipped edge (EG1) and the central axis (AL) is defined as ND, a maximum outer diameter of the center-shielding lens element (22) is defined as DL, a maximum shielding width of the center-shielding area (RG1) is defined as CL, and the following conditions are met: 0.49 ≤ ND × 2 / DL ≤ 0.9; and 0.04 ≤ CL / ( ND × 2 ) ≤ 0.

45. Imaging lens (10) according to claim 1, wherein a field of view of the imaging lens (10) is FOV and the following condition is met: 6 degrees ≤ FOV ≤ 65 degrees . Imaging lens (10) according to claim 1, wherein the optical transmission area (RG2) of the second optical surface (122) comprises an image-side effective optical area (1222), wherein the image-side effective optical area (1222) is arranged adjacent to the center-shielding area (RG1) and the beam path passes through the image-side effective optical area (1222); and wherein a minimum distance between an outer edge of the image-side effective optical area (1222), furthest from the central axis (AL), and the first optical surface (121) is ET, a central thickness of the central shielding lens element (12) defined by the central axis (AL), which passes through a center of the center-shielding lens element (12), is CT, and the following condition is met: 0.13 ≤ ET / CT ≤ 0.

95. Imaging lens (10) according to claim 1, further comprising a tube (11), wherein the center-shielding lens element (12) is arranged on the tube (11), the tube (11) comprises a minimum through-hole and the central axis (AL) passes through the minimum through-hole; and wherein, on a projection plane perpendicular to the central axis (AL), a maximum shielding width of the center-shielding area (RG1) is defined as CL, a through-hole diameter of the minimum through-hole is defined as BD, and the following condition is satisfied: 0.03 ≤ CL / BD ≤ 0.

52. Imaging lens (10) according to claim 1, wherein the plurality of lens elements (12, 13, 14) further comprises a rearmost lens element (14) and the rearmost lens element (14) is a lens element which is closest to the image side among the plurality of lens elements (12, 13, 14); and wherein, on a projection plane perpendicular to the central axis (AL), a rearmost lens outer diameter of the rearmost lens element (14) is defined as DI, a maximum outer diameter of the center-shielding lens element (12) is defined as DL, and the following condition is satisfied: 0.6 ≤ DI / DL ≤ 1.

4. Imaging lens (10) according to claim 1, wherein the second optical surface (122) of the center-shielding lens element (12) further comprises a peripheral shielding area (RG3) arranged on a side of the optical transmission area (RG2) that is furthest from the center-shielding area (RG1). Imaging lens (30) according to claim 1, wherein the plurality of lens elements (32, 33, 34) comprises a first lens group (LG1) and a second lens group (LG2), wherein the second lens group (LG2) is arranged on an image side of the first lens group (LG1) and the first lens group (LG1) and the second lens group (LG2) each comprise at least one lens element; and wherein the center-shielding lens element (32) is arranged in the first lens group (LG1) and an axial distance between the first lens group (LG1) and the second lens group (LG2) is variable. Camera module (1) comprising: the imaging lens (10) according to claim 1; and an image sensor (IS) arranged on an image surface (IMG) of the imaging lens (10). Electronic device (400) comprising: the camera module (1) according to claim 20 . Imaging objective (10) comprising: a plurality of lens elements (12, 13, 14) arranged sequentially along a beam path from an object side to an image side, wherein a central axis (AL) of the imaging objective (10) passes through a center of each of the plurality of lens elements (12, 13, 14), the plurality of lens elements (12, 13, 14) comprising a center-shielding lens element (12), and the center-shielding lens element (12) comprising: a first optical surface (121), wherein the central axis (AL) passes through the first optical surface (121); and a second optical surface (122) arranged opposite the first optical surface (121); wherein the second optical surface (122) comprises: a center-shielding region (RG1) wherein the central axis (AL) passes through the center-shielding region (RG1) and the center-shielding region (RG1) comprises a light-shielding layer (L1);and an optical transmission area (RG2) that is adjacent to and surrounds the center-shielding area (RG1); wherein a matte structure (LS1) is provided on the center-shielding area (RG1) and at least a part of the light-shielding layer (L1) is arranged on the matte structure (LS1). Imaging lens (10) according to claim 22, wherein the matte structure (LS1) is rougher than a surface of the optical transmission area (RG2); and wherein a difference in surface roughness between the matte structure (LS1) and the surface of the optical transmission area (RG2) is ΔR and the following condition is met: Ra 0.1 µm ≤ ΔR ≤ Ra 7.0 µm, where Ra represents the arithmetic mean roughness. Imaging lens (10) according to claim 22, wherein the matte structure (LS1) comprises a plurality of projections (PT1) arranged sequentially based on the central axis (AL). Imaging lens (10) according to claim 22, wherein a number of the plurality of lens elements (12, 13, 14) is N, a number of lens elements (13, 14) arranged on an image side of the center-shielding lens element (12) is among the plurality of lens elements (12, 13, 14) is M, and the following condition is satisfied: N × 0.5 ≤ M . Imaging lens (10) according to claim 22, wherein the first optical surface (121) is arranged on an object side of the center-shielding lens element (12) and the second optical surface (122) is arranged on an image side of the center-shielding lens element (12); wherein the first optical surface (121) comprises an object-side effective optical area (1211), the optical transmission area (RG2) of the second optical surface (122) comprises an image-side effective optical area (1222), the image-side effective optical area (1222) is arranged adjacent to the center-shielding area (RG1), and the beam path passes sequentially through the object-side effective optical area (1211) and the image-side effective optical area (1222);and wherein, in a direction parallel to the central axis (AL), a maximum distance from a position of the first optical surface (121) through which the central axis (AL) passes to an outer edge of the object-side effective optical area (1211) furthest from the central axis (AL) is SL1, a maximum distance from a position of the second optical surface (122) through which the central axis (AL) passes to an outer edge of the image-side effective optical area (1222) furthest from the central axis (AL) is SL2, and the following condition is satisfied: 0.04 ≤ SL2 / SL1 ≤ 0.35 .; Imaging lens (10) according to claim 22, wherein on a projection plane perpendicular to the central axis (AL) a maximum shielding width of the center-shielding area (RG1) is defined as CL, a maximum outer diameter of the center-shielding lens element (12) is defined as DL and the following condition is met: 0.03 ≤ CL / DL ≤ 0.33 . Imaging lens (10) according to claim 22, wherein the optical transmission area (RG2) of the second optical surface (122) comprises an image-side effective optical area (1222), wherein the image-side effective optical area (1222) is arranged adjacent to the center-shielding area (RG1) and the beam path passes through the image-side effective optical area (1222); and wherein a minimum distance between an outer edge of the image-side effective optical area (1222), furthest from the central axis (AL), and the first optical surface (121) is ET, a central thickness of the central shielding lens element (12) defined by the central axis (AL), which passes through a center of the center-shielding lens element (12), is CT, and the following condition is met: 0.13 ≤ ET / CT ≤ 0.

95. Imaging lens (10) according to claim 22, wherein the plurality of lens elements (12, 13, 14) further comprises a rearmost lens element (14) and the rearmost lens element (14) is a lens element that is closest to the image side among the plurality of lens elements (12, 13, 14); and wherein, on a projection plane perpendicular to the central axis (AL), a rearmost lens outer diameter of the rearmost lens element (14) is defined as DI, a maximum outer diameter of the center-shielding lens element (12) is defined as DL, and the following condition is satisfied: 0.6 ≤ DI / DL ≤ 1.4.

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