Imaging lens, camera module and electronic device

Abstract

The utility model discloses an imaging lens, contain multiple lenses of arranging in proper order from object side to image side according to light path, and the central axis of imaging lens passes through the center of each piece of lens. These lenses contain a center shading lens, and the center shading lens contains a first optical surface and a second optical surface. The central axis passes through the first optical surface, and the second optical surface is opposite to the first optical surface. The second optical surface contains a center shading area and an optical light transmission area. The central axis passes through the center shading area, and the center shading area contains a shading layer. The optical light transmission area is adjacent to the center shading area, and the optical light transmission area surrounds the center shading area. Wherein, the inside and the outside of the center shading area all have low reflection characteristics. The utility model also discloses a camera module with the above-mentioned imaging lens and an electronic device with the camera module.

Description

Technical Field

[0001] This utility model relates to an imaging lens, a camera module, and an electronic device, particularly an imaging lens and camera module suitable for electronic devices. Background Technology

[0002] With advancements in semiconductor technology, the performance of electronic image sensors has improved, allowing pixels to reach smaller sizes. Therefore, high-quality imaging lenses have become an indispensable component. Furthermore, with the rapid development of technology, mobile devices equipped with imaging lenses are being used more widely, leading to more diverse requirements for these lenses.

[0003] With increasing shooting demands, imaging lenses need to adapt to increasingly demanding environments. In traditional technology, glare caused by light reflection from the optical surfaces inside the lens often leads to image quality degradation and can generally only be suppressed through limited means such as coatings. However, these methods suffer from limitations in design space and inconsistent results, making it difficult to effectively eliminate glare caused by internal reflections, thus limiting the overall performance of the optical system. Therefore, how to improve the light-shielding configuration of imaging lenses to solve the problem of glare caused by reflections from internal lens surfaces has become an important issue in this field. Utility Model Content

[0004] In view of the above-mentioned problems, this utility model provides an imaging lens, camera module and electronic device. By setting a light-shielding layer at the center of the lens, the glare phenomenon caused by reflection from inside the lens is effectively eliminated, and excellent image quality is maintained, further improving the performance and stability of the overall optical system.

[0005] This invention provides an imaging lens comprising a plurality of lenses arranged sequentially from the object side to the image side along an optical path, with the central axis of the imaging lens passing through the center of each lens. These lenses include a central light-blocking lens, which 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 disposed opposite to the first optical surface, comprising a central light-blocking area and an optically transparent area. The central axis passes through the central light-blocking area, which includes a light-blocking layer. The optically transparent area is adjacent to and surrounds the central light-blocking area. Both the inner and outer sides of the central light-blocking area have low reflectivity.

[0006] This invention also provides an imaging lens comprising a plurality of lenses arranged sequentially from the object side to the image side according to the optical path, with the central axis of the imaging lens passing through the center of each lens. These lenses include a central light-blocking lens, which 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 disposed opposite to the first optical surface, comprising a central light-blocking area and an optically transparent area. The central axis passes through the central light-blocking area, which comprises a light-blocking layer. The optically transparent area is adjacent to and surrounds the central light-blocking area. The central light-blocking area is provided with an extinction structure, and at least a portion of the light-blocking layer is disposed within the extinction structure.

[0007] This invention provides a camera module comprising the aforementioned imaging lens and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens.

[0008] This invention provides an electronic device that includes the aforementioned camera module.

[0009] According to the imaging lens, camera module and electronic device disclosed in this utility model, by setting a light-shielding layer at the center of the lens, glare generated by reflection through the center surface of the lens is eliminated, while maintaining the quality of imaging optics, thereby improving the overall optical quality.

[0010] In one embodiment, when certain characteristic conditions are met, glare caused by the reflection of light on the inner surface of the lens can be eliminated, thereby maintaining image quality and overall optical performance. In addition, glare caused by the reflection of the optical surfaces of the central shading lens and other lenses can be eliminated, thereby improving optical quality.

[0011] In one embodiment, when certain characteristic conditions are met, reflection can be further reduced and the adhesion of the light-shielding layer can be increased.

[0012] The above description of the present utility model and the following description of the embodiments are used to demonstrate and explain the principle of the present utility model, and to provide a further explanation of the scope of the patent application of the present utility model. Attached Figure Description

[0013] Figure 1 A cross-sectional schematic diagram of a camera module according to the first embodiment of the present invention is shown.

[0014] Figure 2 Draw Figure 1 A cross-sectional schematic diagram of the central light-blocking lens in the imaging lens of the camera module.

[0015] Figure 3 Draw Figure 2 An enlarged schematic diagram of region EL3.

[0016] Figure 4 Draw Figure 2 The projection view of the central shading lens on the vertical central axis.

[0017] Figure 5 Draw Figure 4 An enlarged schematic diagram of region EL5.

[0018] Figure 6 A cross-sectional schematic diagram of a camera module according to a second embodiment of the present invention is shown.

[0019] Figure 7 Draw Figure 6 A cross-sectional schematic diagram of the central light-blocking lens in the imaging lens of the camera module.

[0020] Figure 8 Draw Figure 7 An enlarged schematic diagram of region EL8.

[0021] Figure 9 Draw Figure 7 The projection view of the central shading lens on the vertical central axis.

[0022] Figure 10 Draw Figure 9 An enlarged schematic diagram of region EL10.

[0023] Figure 11 A cross-sectional schematic diagram of a camera module according to a third embodiment of the present invention is shown.

[0024] Figure 12 Draw Figure 11 A cross-sectional schematic diagram of the central light-blocking lens in the imaging lens of the camera module.

[0025] Figure 13 Draw Figure 12 An enlarged schematic diagram of region EL13.

[0026] Figure 14 Draw Figure 12 The projection view of the central shading lens on the vertical central axis.

[0027] Figure 15 Draw Figure 14 An enlarged 3D schematic diagram of region EL15.

[0028] Figure 16 An enlarged perspective view of an extinction structure according to another embodiment of the present invention is shown.

[0029] Figure 17 An enlarged perspective view of an extinction structure according to another embodiment of the present invention is shown.

[0030] Figure 18 A perspective view of one side of an electronic device according to a fourth embodiment of the present invention is shown.

[0031] Figure 19 Draw Figure 18 A three-dimensional diagram of the other side of the electronic device.

[0032] Figure 20 A schematic diagram illustrating the image captured by the ultra-wide-angle camera module.

[0033] Figure 21 A schematic diagram illustrating the image captured by a high-resolution camera module.

[0034] Figure 22 A schematic diagram illustrating the image captured by a telephoto camera module.

[0035] Figure 23 A perspective view of one side of an electronic device according to a fifth embodiment of the present invention is shown.

[0036] Figure 24 A perspective view of an electronic device according to the sixth embodiment of the present invention is shown.

[0037] Figure 25 Draw Figure 24 A side view of the electronic device.

[0038] Figure 26 Draw Figure 24 A top view of the electronic device.

[0039] [Symbol Explanation]

[0040] 1,2,3,400a,400b,400c,500a,500b,500c,500d,500e,500f,500g,500h,500i,600a: Camera modules

[0041] 10, 20, 30: Imaging lens

[0042] 11, 21, 31: Lens tube

[0043] 12,13,14,22,23,24,29,32,33,34: Lenses

[0044] 12, 22, 32: Central shading lens

[0045] 121, 221, 321: First optical surface

[0046] 1211,2211,3211: Effective optical surface on the object side

[0047] 122,222,322: Second optical surface

[0048] 1222,2222,3222: Image-side optical effective surface

[0049] 14, 24, 34: Most like the side lens

[0050] 25, 35, 36: Reflective elements

[0051] 251, 252, 253, 351, 361: Reflecting surfaces

[0052] 400, 500, 600: Electronic devices

[0053] 401, 501: Flash module

[0054] 402: Focusing Assist Module

[0055] 403: Image Signal Processor

[0056] 404: Display module

[0057] AL: Central axis

[0058] BW1: Bottom

[0059] EG1: Inward Edge

[0060] FT: Filter element

[0061] IMG: Imaging Surface

[0062] IS: Electronic photosensitive element

[0063] LG1: First Shot

[0064] LG2: Second Shot

[0065] L1: Light-shielding layer

[0066] LS1: Extinction Structure

[0067] PEL1, PRG3: Highlight edges

[0068] PT1, PT2, PT3: Protruding structures

[0069] RG1: Central shading area

[0070] RG2: Optical Transmittance Zone

[0071] RG3: Surrounding Shading Area

[0072] S1: Inner side

[0073] S2: Outer side

[0074] SW1: wall

[0075] SL1: The longest distance from the central axis to the edge of the object-side effective optical surface away from the central axis on the first optical surface.

[0076] SL2: The longest distance from the central axis to the edge of the image-side effective optical surface away from the central axis on the second optical surface.

[0077] CL: The central shading zone is defined with a maximum shading length.

[0078] DL: The central shading lens is defined as having a maximum outer diameter.

[0079] ND: The closest distance between the indented edge and the central axis

[0080] FOV: The field of view of the imaging lens

[0081] ET: The shortest distance between the edge of the image-side effective optical surface furthest from the central axis and the first optical surface.

[0082] CT: The central axis passes through the center of the central shading lens and defines the central thickness of the central shading lens.

[0083] BD: Minimum through hole definition - through hole diameter

[0084] DI: Definition of the most image-side lens: There is an outer diameter of the most image-side lens. Detailed Implementation

[0085] The detailed features and advantages of this utility model are described below in the embodiments. The content is sufficient for any person skilled in the art to understand the technical content of this utility model and to implement it accordingly. Furthermore, based on the disclosure, claims, and drawings in this specification, any person skilled in the art can easily understand the related objectives and advantages of this utility model. The following embodiments further illustrate the viewpoints of this utility model in detail, but are not intended to limit the scope of this utility model in any way.

[0086] This invention provides an imaging lens comprising a plurality of lenses arranged sequentially from the object side to the image side along an optical path, with the central axis of the imaging lens passing through the center of each lens. Among these lenses is a central light-blocking lens, which includes a first optical surface and a second optical surface. The central axis passes through the first optical surface, and the second optical surface is disposed opposite to the first optical surface. The central light-blocking lens can be a glass lens or a plastic lens; this invention is not limited to any specific material.

[0087] The second optical surface includes a central light-shielding area and an optically transparent area. A central axis passes through the central light-shielding area, and the central light-shielding area includes a light-shielding layer. The light-shielding layer may be made of a black material to suppress unwanted light from entering subsequent optical components, but this invention is not limited thereto. For example, please refer to... Figure 2 and Figure 3 The accompanying drawings illustrate a central light-shielding area and its light-shielding layer according to the first embodiment of this utility model. It should be noted that the light-shielding layer shown in the drawings of this utility model is only intended to indicate its location, and the actual thickness and material properties are not limited to the appearance shown in the drawings.

[0088] The optically transparent area is adjacent to and surrounds the central light-blocking area, allowing imaging light to penetrate the optically transparent area and then pass through the overall lens system. The imaging light path passes through the first optical surface and the second optical surface, and finally forms an image on an imaging plane of the imaging lens.

[0089] According to the imaging lens disclosed in this utility model, by setting a light-shielding layer at the center of the lens, glare generated by reflection through the center surface of the lens is eliminated, while maintaining the quality of imaging optics, thereby improving the overall optical quality.

[0090] In one embodiment, both the inner and outer sides of the central light-shielding area may have low reflectivity. The inner side of the central light-shielding area refers to the central light-shielding area as observed from the first optical surface, while the outer side refers to the central light-shielding area as observed from the second optical surface, and the outer side may further be the surface of the light-shielding layer. The low reflectivity can be defined as a reflectance of less than 30%. Alternatively, the reflectance may be less than 15%, or less than 5%. The low reflectivity of the inner side of the central light-shielding area means that the reflectance of the central light-shielding area measured from the first optical surface is less than 30%; thereby, glare caused by reflection of light from the internal surface of the lens can be eliminated, thus maintaining image quality and overall optical performance. The low reflectivity of the outer side of the central light-shielding area means that the reflectance of the central light-shielding area measured from the second optical surface is less than 30%; thereby, glare caused by reflection from the optical surfaces of the central light-shielding lens and other lenses can be eliminated, thus improving optical quality.

[0091] In one embodiment, the central shading area may be provided with an extinction structure, and at least a portion of the shading layer is disposed on the extinction structure. This further reduces reflection and increases the adhesion of the shading layer.

[0092] The number of these lenses (i.e., the total number of lenses) is N, and the number of lenses placed on the image side of the central shading lens is M, which can satisfy the following condition: N×0.5 ≤ M. In this way, the influence of the central shading area on the imaging light can be reduced, thereby maintaining optical quality.

[0093] The central shading lens can be the one closest to the object side among these lenses. This helps reduce the probability of non-imaging light rays entering other lenses, thereby optimizing the overall optical quality.

[0094] The imaging lens disclosed in this invention may further include a reflective element, and a central light-blocking lens may be disposed on the object side of the reflective element. This effectively optimizes the light distribution entering the reflective element, thereby reducing the risk of glare caused by the reflective element.

[0095] The reflective element can contain multiple reflective surfaces. This allows for optical path folding through multiple reflections, effectively reducing the overall size of the imaging lens and increasing system design flexibility. The number of reflective surfaces can be three or more.

[0096] The first optical surface can be disposed on the object side of the central light-blocking lens, and the second optical surface can be disposed on the image side of the central light-blocking lens. This allows the first optical surface to pre-optimize the incoming light path, achieving optimal imaging and light-blocking effects.

[0097] The first optical surface may include an object-side effective optical surface, and the optically transparent area of ​​the second optical surface may include an image-side effective optical surface. Furthermore, the image-side effective optical surface is adjacent to the central shading area, and the optical path passes sequentially through the object-side and image-side effective optical surfaces. Specifically, in the direction parallel to the central axis, the longest distance from the central axis of the first optical surface to the edge of the object-side effective optical surface away from the central axis is SL1, and the longest distance from the central axis of the second optical surface to the edge of the image-side effective optical surface away from the central axis is SL2, which can satisfy the following condition: 0.04 ≤ SL2 / SL1 ≤ 0.35. This improves the light-gathering quality and reduces the impact of the shading area on imaging. Alternatively, the following condition can also be satisfied: 0.05 ≤ SL2 / SL1 ≤ 0.3. Alternatively, the following condition can also be satisfied: 0.06 ≤ SL2 / SL1 ≤ 0.25. Please refer to [reference needed]. Figure 2 It illustrates a schematic diagram of parameters SL1 and SL2 according to the first embodiment of the present invention.

[0098] The light-shielding layer may include multiple protruding edges adjacent to the optically transparent area and arranged sequentially around a central axis, with each protruding edge gradually tapering away from the central axis. The shapes of the protruding edges may be arc-shaped, conical, acute-angled, obtuse-angled, etc., but this invention is not limited to these forms. Furthermore, the protruding edges may be connected by arc-shaped connections.

[0099] The matting structure can be disposed on the surface of the central light-shielding area, and the surface of the matting structure can be rougher than that of the optically transparent area. The surface roughness difference between the matting structure and the optically transparent area is ΔR, which can satisfy the following conditions: Ra 0.1 μm ≤ ΔR ≤ Ra 7.0 μm, where Ra is the arithmetic mean roughness. This further reduces reflection and increases the adhesion of the light-shielding layer. Alternatively, it can satisfy the following conditions: Ra 0.12 μm ≤ ΔR ≤ Ra 6.0 μm. Or, it can satisfy the following conditions: Ra 0.15 μm ≤ ΔR ≤ Ra 5.0 μm.

[0100] In one embodiment, the matting structure may include multiple protruding structures arranged sequentially along a central axis. This arrangement of protruding structures further enhances the low-reflection effect and improves the adhesion of the light-shielding layer. The protruding structures can be arranged sequentially around or perpendicular to the central axis, forming an array pattern.

[0101] The central shading area may include a wall and a bottom surface. The wall extends from the side of the optically transparent area near the central axis toward the first optical surface, and the bottom surface connects to the side of the wall away from the optically transparent area. A light-shielding layer may be disposed on the wall and the bottom surface. This forms a basin shape for the central shading area, thereby increasing the thickness of the light-shielding layer and improving the light-shielding effect.

[0102] On a projection plane perpendicular to the central axis, the central shading area is defined with a maximum shading length CL, and the central shading lens is defined with a maximum outer diameter DL, which can satisfy the following condition: 0.03 ≤ CL / DL ≤ 0.33. This ensures the ratio of light transmission to shading, maintaining image quality while eliminating glare. Alternatively, it can also satisfy the following condition: 0.04 ≤ CL / DL ≤ 0.3. And also, it can satisfy the following condition: 0.05 ≤ CL / DL ≤ 0.25. Please refer to... Figure 4 It illustrates a schematic diagram of parameters CL and DL according to the first embodiment of the present invention.

[0103] The central light-blocking lens can be a non-circular lens and may include at least one recessed edge, which is recessed inward toward the central axis. This non-circular design reduces the size and weight of the imaging lens. The central light-blocking lens may have a single recessed edge or two opposing recessed edges; the invention is not limited to the number of recessed edges.

[0104] On a projection plane perpendicular to the central axis, the closest distance between the recessed edge and the central axis is ND. The central shading lens is defined with a maximum outer diameter DL, which satisfies the following condition: 0.49 ≤ ND×2 / DL ≤ 0.9. This avoids excessive shading that could degrade image quality. It also satisfies the following conditions: 0.55 ≤ ND×2 / DL ≤ 0.85. Furthermore, it also satisfies the following condition: 0.6 ≤ ND×2 / DL ≤ 0.8. It should be noted that the center of the maximum outer diameter must pass through the central axis. Please refer to... Figure 9 It illustrates a schematic diagram of parameters ND and DL according to the second embodiment of the present invention.

[0105] On a projection plane perpendicular to the central axis, the central shading area is defined with a maximum shading length of CL and the closest distance between the inner edge and the central axis of ND. This shading area must satisfy the following condition: 0.04 ≤ CL / (ND×2) ≤ 0.45. This avoids excessive shading that could degrade image quality. Alternatively, it can also satisfy the following condition: 0.05 ≤ CL / (ND×2) ≤ 0.4. And also, it can satisfy the following condition: 0.06 ≤ CL / (ND×2) ≤ 0.3. Please refer to... Figure 9 It illustrates a schematic diagram of parameters CL and ND according to the second embodiment of the present invention.

[0106] The imaging lens has a field of view (FOV) that satisfies the following conditions: 6 degrees ≤ FOV ≤ 65 degrees. This reduces the impact of the light-blocking layer on the image light quality, thus improving the image quality. Alternatively, it may also satisfy the following conditions: 8 degrees ≤ FOV ≤ 55 degrees. Or, it may satisfy the following condition: 10 degrees ≤ FOV ≤ 45 degrees. Please refer to [reference needed]. Figure 1 It illustrates a schematic diagram of the parameter FOV according to the first embodiment of the present invention.

[0107] The optically transparent area of ​​the second optical surface of the central shading lens may include an image-side effective optical surface, which is adjacent to the central shading area and through which the light path passes. The shortest distance between the edge of the image-side effective optical surface away from the central axis and the first optical surface is ET. The central axis passes through the center of the central shading lens, and a central thickness of the central shading lens is defined as CT, which satisfies the following condition: 0.13 ≤ ET / CT ≤ 0.95. This allows control over the reflection direction of non-imaging rays, effectively preventing glare. Alternatively, it may satisfy the following condition: 0.15 ≤ ET / CT ≤ 0.8. Or, it may satisfy the following condition: 0.2 ≤ ET / CT ≤ 0.7. The central shading lens may further be a positive lens. Please refer to [reference needed]. Figure 2 It illustrates a schematic diagram of parameters ET and CT according to the first embodiment of the present invention.

[0108] The imaging lens disclosed in this utility model may further include a lens barrel, and a central light-blocking lens is disposed in the lens barrel. The lens barrel includes a minimum through-hole, and the central axis passes through the minimum through-hole. On a projection plane perpendicular to the central axis, the central light-blocking area defines a maximum light-blocking length of CL, and the minimum through-hole defines a through-hole diameter of BD, which can satisfy the following condition: 0.03 ≤ CL / BD ≤ 0.52. This allows the size of the light-blocking layer to match the minimum through-hole, thereby improving the light-blocking quality and ensuring that the imaging lens has optimal light intake. Alternatively, the following condition may also be satisfied: 0.04 ≤ CL / BD ≤ 0.45. Alternatively, the following condition may also be satisfied: 0.05 ≤ CL / BD ≤ 0.35. Please refer to... Figure 1 and Figure 4 The diagrams illustrate parameters BD and CL according to the first embodiment of the present invention.

[0109] These lenses include a most image-side lens, which is the lens closest to the image side among these lenses. On a projection plane perpendicular to the central axis, the most image-side lens is defined with an outer diameter DI, and the central shading lens is defined with a maximum outer diameter DL, satisfying the following condition: 0.6 ≤ DI / DL ≤ 1.4. This ensures that the size of the most image-side lens corresponds to the size of the central shading lens, thereby improving image quality. Alternatively, the following condition may also be satisfied: 0.65 ≤ DI / DL ≤ 1.2. Or, the following condition may also be satisfied: 0.7 ≤ DI / DL ≤ 1.1. Please refer to... Figure 1 and Figure 4 Each of the above diagrams illustrates parameters DI and DL according to the first embodiment of the present invention.

[0110] The second optical surface of the central light-shielding lens may further include a peripheral light-shielding area, which is located on the side of the optically transparent area away from the central light-shielding area. By further distributing the light-shielding layer in the peripheral light-shielding area, the imaging light passing through the central light-shielding lens can be optimized, and glare caused by non-imaging light passing through the peripheral light-shielding area can be avoided. The peripheral light-shielding area may also include multiple protruding edges, which are arranged sequentially around the central axis and taper towards the central light-shielding area.

[0111] These lenses may include a first lens group and a second lens group, with the second lens group positioned on the image side of the first lens group. Both the first and second lens groups contain at least one lens. A central light-blocking lens may be located within the first lens group, and the distance between the first and second lens groups along the optical axis is variable. This multi-lens configuration reduces the distance the light-blocking layer needs to move along the central axis, thereby optimizing optical quality. In one embodiment, the second lens group is movable along the central axis; thus, by changing the distance between the second and first lens groups, optical functions such as focusing and zooming can be achieved.

[0112] This invention provides a camera module comprising an electronic photosensitive element and the aforementioned imaging lens, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens.

[0113] This invention provides an electronic device that includes the aforementioned camera module.

[0114] The various technical features disclosed in the imaging lens of this utility model can be combined and configured to achieve the corresponding effects.

[0115] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0116] <First Embodiment>

[0117] Please refer to Figures 1 to 5 ,in Figure 1 A cross-sectional schematic diagram of a camera module according to the first embodiment of the present invention is shown. Figure 2 Draw Figure 1 A cross-sectional diagram of the central light-blocking lens in the imaging lens of the camera module. Figure 3 Draw Figure 2 An enlarged schematic diagram of region EL3. Figure 4 Draw Figure 2 The projection view of the central shading lens on the vertical central axis, and Figure 5 Draw Figure 4 An enlarged schematic diagram of region EL5.

[0118] The camera module 1 in this embodiment includes an imaging lens 10 and an electronic image sensor IS. The imaging lens 10 includes a lens barrel 11, a plurality of lenses 12, 13 and 14, a filter element FT, and an imaging plane IMG. The lens barrel 11 includes a minimum through-hole (unless otherwise labeled, see reference). Figure 1(As indicated by the parameter BD), and a central axis AL of the imaging lens 10 passes through a minimum through-hole. These lenses 12, 13, and 14 are disposed in the lens barrel 11 and arranged sequentially from the object side to the image side according to the optical path, and the central axis AL passes through the center of each lens 12, 13, and 14. A filter element FT is disposed between these lenses 12, 13, and 14 and the imaging surface IMG, and an electronic photosensitive element IS is disposed on the imaging surface IMG.

[0119] These lenses 12, 13, and 14 include a central light-blocking lens 12 and an image-side lens 14. The central light-blocking lens 12 is the lens closest to the object side among these lenses 12, 13, and 14, and the image-side lens 14 is the lens closest to the image side among these lenses 12, 13, and 14. The central light-blocking lens 12 is a positive lens.

[0120] The central light-blocking lens 12 includes 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 disposed opposite to the first optical surface 121. The first optical surface 121 is disposed on the object side of the central light-blocking lens 12, and the second optical surface 122 is disposed on the image side of the central light-blocking lens 12. That is, the first optical surface 121 can be the object-side surface of the central light-blocking lens 12, and the second optical surface 122 can be the image-side surface of the central light-blocking lens 12. The imaging optical path sequentially passes through the first optical surface 121 and the second optical surface 122, then through lenses 13 and 14 disposed on the image side of the central light-blocking lens 12, and the filter element FT, and finally images are formed on the imaging surface IMG.

[0121] The second optical surface 122 includes a central light-blocking area RG1, an optically transparent area RG2, and a peripheral light-blocking area RG3. The central axis AL passes through the central light-blocking area RG1, and the central light-blocking area RG1 includes a light-blocking layer L1. The optically transparent area RG2 is adjacent to the central light-blocking area RG1 and surrounds the central light-blocking area RG1. The peripheral light-blocking area RG3 is located on the side of the optically transparent area RG2 away from the central light-blocking area RG1.

[0122] like Figure 4 and Figure 5 As shown, the light-shielding layer L1 includes multiple protruding edges PEL1, which are adjacent to the optically transparent area RG2 and arranged sequentially around the central axis AL, with each protruding edge PEL1 tapering away from the central axis AL. In this embodiment, the protruding edges PEL1 are arc-shaped and connected to each other by arcs.

[0123] like Figure 4As shown, the peripheral shading area RG3 contains multiple protruding edges PRG3, and these protruding edges PRG3 are arranged sequentially around the central axis AL and gradually taper towards the central shading area RG1.

[0124] Both the inner side S1 and the outer side S2 of the central shading area RG1 have low reflectivity, wherein the outer side S2 of the central shading area RG1 is the surface of the shading layer L1. In this embodiment, the reflectivity of the inner side S1 of the central shading area RG1 is less than 30%, and the reflectivity of the outer side S2 of the central shading area RG1 is also less than 30%.

[0125] like Figure 3 and Figure 5 As shown, the central shading area RG1 is provided with an extinction structure LS1, which is recessed towards the first optical surface 121, and at least a portion of the shading layer L1 is disposed on the extinction structure LS1.

[0126] like Figure 2 As shown, the first optical surface 121 includes an object-side optical effective surface 1211, and the optically transparent region RG2 of the second optical surface 122 includes an image-side optical effective surface 1222. Furthermore, the image-side optical effective surface 1222 is adjacent to the central shading region RG1, and the optical path passes sequentially through the object-side optical effective surface 1211 and the image-side optical effective surface 1222. Specifically, in the direction parallel to the central axis AL, the longest distance from the central axis AL to the edge of the object-side optical effective surface 1211 away from the central axis AL is SL1, and the longest distance from the central axis AL to the edge of the image-side optical effective surface 1222 away from the central axis AL is SL2, satisfying the following conditions: SL1 = 0.71 mm; SL2 = 0.08 mm; and SL2 / SL1 = 0.113.

[0127] like Figure 1 As shown, the number of these lenses 12, 13 and 14 is N, and the number of lenses 13 and 14 disposed on the image side of the central light-blocking lens 12 is M, which satisfies the following conditions: N = 5; M = 4; and N×0.5 ≤ M.

[0128] like Figure 5 As shown, an extinction structure LS1 is disposed on the surface of the central light-blocking area RG1, and the surface of the extinction structure LS1 is rougher than that of the optically transparent area RG2. In this embodiment, the roughness of the extinction structure LS1 in the central light-blocking area RG1 is between Ra 0.3 and 0.5 micrometers, and the roughness of the optically transparent area RG2 is less than Ra 0.1 micrometers, where Ra is the arithmetic mean roughness. The surface roughness difference between the extinction structure LS1 and the optically transparent area RG2 is ΔR, which satisfies the following condition: Ra 0.1 micrometers ≤ ΔR ≤ Ra 7.0 micrometers.

[0129] like Figure 4 As shown, on a projection plane perpendicular to the central axis AL, the central shading area RG1 is defined with a maximum shading length of CL, and the central shading lens 12 is defined with a maximum outer diameter of DL, which satisfy the following conditions: CL = 0.70 mm; DL = 6.5 mm; and CL / DL = 0.108.

[0130] like Figure 1 As shown, the field of view (FOV) of the imaging lens 10 satisfies the following condition: FOV = 32.6 degrees. The field of view of the imaging lens 10 corresponds to the maximum image height of the electronic image sensor IS (unless otherwise labeled, please refer to...). Figure 1 (The intersection of the optical path and the electronic photosensitive element IS).

[0131] like Figure 2 As shown, the shortest distance between the edge of the image-side optical effective surface 1222 away from the central axis AL and the first optical surface 121 is ET. The central axis AL passes through the center of the central shading lens 12 and defines a central thickness of the central shading lens 12 as CT, which satisfies the following conditions: ET = 0.29 mm; CT = 1.08 mm; and ET / CT = 0.269.

[0132] like Figure 1 and Figure 4 As shown, on a projection plane of the vertical central axis AL, the central shading area RG1 is defined with a maximum shading length of CL and a minimum through hole with a through hole diameter of BD, which satisfy the following conditions: CL = 0.70 mm; BD = 4.58 mm; and CL / BD = 0.152.

[0133] like Figure 1 and Figure 4 As shown, on a projection plane perpendicular to the central axis AL, the most image-side lens 14 is defined with an outer diameter of DI, and the central shading lens 12 is defined with a maximum outer diameter of DL, which satisfy the following conditions: DI = 5.2 mm; DL = 6.5 mm; and DI / DL = 0.8.

[0134] <Second Embodiment>

[0135] Please refer to Figures 6 to 10 ,in Figure 6 A cross-sectional schematic diagram of a camera module according to a second embodiment of the present invention is shown. Figure 7 Draw Figure 6 A cross-sectional diagram of the central light-blocking lens in the imaging lens of the camera module. Figure 8 Draw Figure 7 An enlarged diagram of region EL8. Figure 9 Draw Figure 7 The projection view of the central shading lens on the vertical central axis, and Figure 10 Draw Figure 9 An enlarged schematic diagram of region EL10.

[0136] The camera module 2 in this embodiment includes an imaging lens 20 and an electronic image sensor IS. The imaging lens 20 includes a lens barrel 21, multiple lenses 29, 22, 23, and 24, a reflective element 25, a filter element FT, and an imaging plane IMG. The lens barrel 21 includes a minimum through-hole (unless otherwise specified, see reference '...'). Figure 6 (As indicated by the parameter BD), and the central axis AL of the imaging lens 20 passes through a minimum through-hole. These lenses 29, 22, 23, and 24 are disposed in the lens barrel 21 and arranged sequentially from the object side to the image side according to the optical path, and the central axis AL passes through the center of each lens 29, 22, 23, and 24. A reflective element 25 is disposed along the optical path between these lenses 29, 22, 23, and 24 and the filter element FT, the filter element FT is disposed along the optical path between the reflective element 25 and the imaging surface IMG, and the electronic photosensitive element IS is disposed on the imaging surface IMG.

[0137] Lenses 29, 22, 23, and 24 include a central light-blocking lens 22 and an image-side lens 24. The central light-blocking lens 22 is the second lens from the object side among lenses 29, 22, 23, and 24, and the image-side lens 24 is the lens closest to the image side among lenses 29, 22, 23, and 24. The central light-blocking lens 22 is a positive lens and is disposed on the object side of the reflecting element 25. In this embodiment, the reflecting element 25 includes three reflecting surfaces 251, 252, and 253.

[0138] The central light-blocking lens 22 includes 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 disposed opposite to the first optical surface 221. The first optical surface 221 is disposed on the object side of the central light-blocking lens 22, and the second optical surface 222 is disposed on the image side of the central light-blocking lens 22. That is, the first optical surface 221 can be the object-side surface of the central light-blocking lens 22, and the second optical surface 222 can be the image-side surface of the central light-blocking lens 22. The imaging optical path sequentially passes through lens 29, the first optical surface 221 and the second optical surface 222 of the central light-blocking lens 22, then through lenses 23 and 24 disposed on the image side of the central light-blocking lens 22, the reflective element 25, and the filter element FT, and finally images are formed on the imaging surface IMG.

[0139] The second optical surface 222 includes a central light-shielding area RG1 and an optically transparent area RG2. The central axis AL passes through the central light-shielding area RG1, and the central light-shielding area RG1 includes a light-shielding layer L1. The optically transparent area RG2 is adjacent to the central light-shielding area RG1 and surrounds the central light-shielding area RG1.

[0140] like Figure 9 and Figure 10 As shown, the light-shielding layer L1 includes multiple protruding edges PEL1, which are adjacent to the optically transparent area RG2 and arranged sequentially around the central axis AL, with each protruding edge PEL1 tapering away from the central axis AL. In this embodiment, the protruding edges PEL1 have an acute angle shape.

[0141] Both the inner side S1 and the outer side S2 of the central shading area RG1 have low reflectivity, wherein the outer side S2 of the central shading area RG1 is the surface of the shading layer L1. In this embodiment, the reflectivity of the inner side S1 of the central shading area RG1 is less than 30%, and the reflectivity of the outer side S2 of the central shading area RG1 is also less than 30%.

[0142] like Figure 8 and Figure 10 As shown, the central shading area RG1 is provided with an extinction structure LS1, and at least a portion of the shading layer L1 is disposed on the extinction structure LS1.

[0143] like Figure 9 As shown, the central light-blocking lens 22 is a non-circular lens and includes two opposing recessed edges EG1, which are recessed inward toward the central axis AL. Furthermore, the central light-blocking lens 22 is a plastic lens, which includes a filler mark GT1 at its outer diameter, and the filler mark GT1 is located at the periphery connecting the two recessed edges EG1.

[0144] like Figure 7 As shown, the first optical surface 221 includes an object-side optical effective surface 2211, and the optically transparent region RG2 of the second optical surface 222 includes an image-side optical effective surface 2222. Furthermore, the image-side optical effective surface 2222 is adjacent to the central shading region RG1, and the optical path passes sequentially through the object-side optical effective surface 2211 and the image-side optical effective surface 2222. Specifically, in the direction parallel to the central axis AL, the longest distance from the central axis AL to the edge of the object-side optical effective surface 2211 away from the central axis AL is SL1, and the longest distance from the central axis AL to the edge of the image-side optical effective surface 2222 away from the central axis AL is SL2, satisfying the following conditions: SL1 = 0.21 mm; SL2 = 0.02 mm; and SL2 / SL1 = 0.095.

[0145] like Figure 6 As shown, the number of these lenses 22, 23 and 24 is N, and the number of lenses 23 and 24 set on the image side of the central light-blocking lens 22 is M, which satisfies the following conditions: N = 5; M = 3; and N×0.5 ≤ M.

[0146] like Figure 10 As shown, an extinction structure LS1 is disposed on the surface of the central light-blocking area RG1, and the surface of the extinction structure LS1 is rougher than that of the optically transparent area RG2. In this embodiment, the roughness of the extinction structure LS1 in the central light-blocking area RG1 is between Ra 2.8 and 3.5 micrometers, and the roughness of the optically transparent area RG2 is less than Ra 0.1 micrometers, where Ra is the arithmetic mean roughness. The surface roughness difference between the extinction structure LS1 and the optically transparent area RG2 is ΔR, which satisfies the following condition: Ra 0.1 micrometers ≤ ΔR ≤ Ra 7.0 micrometers.

[0147] like Figure 9 As shown, on a projection plane perpendicular to the central axis AL, the central shading area RG1 is defined with a maximum shading length of CL, and the central shading lens 22 is defined with a maximum outer diameter of DL, which satisfy the following conditions: CL = 1.02 mm; DL = 6.3 mm; and CL / DL = 0.162.

[0148] like Figure 9 As shown, on a projection plane perpendicular to the central axis AL, the closest distance between the recessed edge EG1 and the central axis AL is ND. The central light-blocking lens 22 is defined with a maximum outer diameter DL, which satisfies the following conditions: ND = 2.38 mm; DL = 6.3 mm; and ND×2 / DL = 0.756. The center of the maximum outer diameter DL passes through the central axis AL.

[0149] like Figure 9 As shown, on a projection plane of the vertical central axis AL, the central shading area RG1 is defined with a maximum shading length of CL, and the closest distance between the inner edge EG1 and the central axis AL is ND, which satisfies the following conditions: CL = 1.02 mm; ND = 2.38 mm; and CL / (ND×2) = 0.214.

[0150] like Figure 6 As shown, the field of view (FOV) of the imaging lens 20 satisfies the following condition: FOV = 32.6 degrees. The field of view of the imaging lens 20 corresponds to the maximum image height of the electronic image sensor IS (unless otherwise labeled, please refer to...). Figure 6 (The intersection of the optical path and the electronic photosensitive element IS).

[0151] like Figure 7As shown, the shortest distance between the edge of the image-side optical effective surface 2222 away from the central axis AL and the first optical surface 221 is ET. The central axis AL passes through the center of the central shading lens 22 and a central thickness of the central shading lens 22 is defined as CT, which satisfies the following conditions: ET = 0.26 mm; CT = 0.46 mm; and ET / CT = 0.565.

[0152] like Figure 6 and Figure 9 As shown, on a projection plane of the vertical central axis AL, the central shading area RG1 is defined with a maximum shading length of CL and a minimum through hole with a through hole diameter of BD, which satisfy the following conditions: CL = 1.02 mm; BD = 3.92 mm; and CL / BD = 0.260.

[0153] like Figure 6 and Figure 9 As shown, on a projection plane perpendicular to the central axis AL, the most image-side lens 24 is defined with an outer diameter of DI, and the central shading lens 22 is defined with a maximum outer diameter of DL, which satisfy the following conditions: DI = 5.2 mm; DL = 6.3 mm; and DI / DL = 0.825.

[0154] <Third Embodiment>

[0155] Please refer to Figures 11 to 15 ,in Figure 11 A cross-sectional schematic diagram of a camera module according to a third embodiment of the present invention is shown. Figure 12 Draw Figure 11 A cross-sectional diagram of the central light-blocking lens in the imaging lens of the camera module. Figure 13 Draw Figure 12 An enlarged schematic diagram of region EL13. Figure 14 Draw Figure 12 The projection view of the central shading lens on the vertical central axis, and Figure 15 Draw Figure 14 An enlarged 3D schematic diagram of region EL15.

[0156] The camera module 3 in this embodiment includes an imaging lens 30 and an electronic image sensor IS. The imaging lens 30 includes a lens barrel 31, multiple lenses 32, 33, and 34, two reflective elements 35 and 36, a filter element FT, and an imaging plane IMG. The lens barrel 31 includes a minimum through-hole (unless otherwise specified, see reference '...'). Figure 11(As indicated by the parameter BD), and the central axis AL of the imaging lens 30 passes through a minimum through-hole. These lenses 32, 33, and 34 are disposed in the lens barrel 31 and arranged sequentially from the object side to the image side according to the optical path, and the central axis AL passes through the center of each lens 32, 33, and 34. The filter element FT is disposed between these lenses 32, 33, and 34 and the imaging surface IMG along the optical path direction, and the electronic photosensitive element IS is disposed on the imaging surface IMG.

[0157] These lenses 32, 33, and 34 include a central light-blocking lens 32 and an image-side lens 34. The central light-blocking lens 32 is the lens closest to the object side among these lenses 32, 33, and 34, and the image-side lens 34 is the lens closest to the image side among these lenses 32, 33, and 34. The central light-blocking lens 32 is a positive lens.

[0158] These lenses 32, 33, and 34 comprise a first lens group LG1 and a second lens group LG2, with the second lens group LG2 positioned on the image side of the first lens group LG1. Both the first lens group LG1 and the second lens group LG2 contain at least one lens. A central light-blocking lens 32 is located within the first lens group LG1, and the distance between the first lens group LG1 and the second lens group LG2 along the optical axis is variable. In this embodiment, the second lens group LG2 is movable along the central axis AL.

[0159] A reflective element 35 is disposed between the first mirror group LG1 and the second mirror group LG2 along the optical path direction, and a reflective element 36 is disposed between the second mirror group LG2 and the filter element FT along the optical path direction. A central light-blocking lens 32 is disposed on the object side of the reflective element 35. In this embodiment, the reflective element 35 includes a reflective surface 351, and the reflective element 36 includes a reflective surface 361.

[0160] The central light-blocking lens 32 includes 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 disposed opposite to the first optical surface 321. The first optical surface 321 is disposed on the object side of the central light-blocking lens 32, and the second optical surface 322 is disposed on the image side of the central light-blocking lens 32. That is, the first optical surface 321 can be the object-side surface of the central light-blocking lens 32, and the second optical surface 322 can be the image-side surface of the central light-blocking lens 32. The imaging optical path sequentially passes through the first mirror group LG1 and the first optical surface 321 and the second optical surface 322 of the central light-blocking lens 32, then through the reflecting element 35, the second mirror group LG2, the reflecting element 36, and the filtering element FT, and finally images onto the imaging surface IMG.

[0161] The second optical surface 322 includes a central light-shielding area RG1 and an optically transparent area RG2. The central axis AL passes through the central light-shielding area RG1, and the central light-shielding area RG1 includes a light-shielding layer L1. The optically transparent area RG2 is adjacent to the central light-shielding area RG1 and surrounds the central light-shielding area RG1.

[0162] Both the inner side S1 and the outer side S2 of the central shading area RG1 have low reflectivity, wherein the outer side S2 of the central shading area RG1 is the surface of the shading layer L1. In this embodiment, the reflectivity of the inner side S1 of the central shading area RG1 is less than 30%, and the reflectivity of the outer side S2 of the central shading area RG1 is also less than 30%.

[0163] like Figure 13 and Figure 15 As shown, the central shading area RG1 is provided with an extinction structure LS1, and at least a portion of the shading layer L1 is disposed on the extinction structure LS1. The extinction structure LS1 includes a plurality of protrusions PT1, and these protrusions PT1 are arranged sequentially according to the central axis AL. In this embodiment, the protrusions PT1 are arranged sequentially in the direction surrounding the central axis AL.

[0164] In addition, such as Figure 13 As shown, the central light-shielding area RG1 includes a wall surface SW1 and a bottom surface BW1. The wall surface SW1 extends from the side of the optically transparent area RG2 near the central axis AL towards the first optical surface 321, and the bottom surface BW1 connects to the side of the wall surface SW1 away from the optically transparent area RG2. A light-shielding layer L1 is disposed on the wall surface SW1 and the bottom surface BW1.

[0165] like Figure 14 As shown, the central light-blocking lens 32 is a non-circular lens and includes two opposing recessed edges EG1, which are recessed inward toward the central axis AL. Furthermore, the central light-blocking lens 32 is a plastic lens, which includes a filler mark GT1 at its outer diameter, and the filler mark GT1 is located at the periphery connecting the two recessed edges EG1.

[0166] like Figure 12As shown, the first optical surface 321 includes an object-side optical effective surface 3211, and the optically transparent region RG2 of the second optical surface 322 includes an image-side optical effective surface 3222. Furthermore, the image-side optical effective surface 3222 is adjacent to the central shading region RG1, and the optical path passes sequentially through the object-side optical effective surface 3211 and the image-side optical effective surface 3222. Specifically, in the direction parallel to the central axis AL, the longest distance from the central axis AL to the edge of the object-side optical effective surface 3211 away from the central axis AL is SL1, and the longest distance from the central axis AL to the edge of the image-side optical effective surface 3222 away from the central axis AL is SL2, satisfying the following conditions: SL1 = 0.52 mm; SL2 = 0.09 mm; and SL2 / SL1 = 0.173.

[0167] like Figure 11 As shown, the number of these lenses 32, 33 and 34 is N, and the number of lenses 33 and 34 set on the image side of the central light-blocking lens 32 is M, which satisfies the following conditions: N = 8; M = 7; and N×0.5 ≤ M.

[0168] like Figure 14 As shown, on a projection plane perpendicular to the central axis AL, the central shading area RG1 is defined with a maximum shading length of CL, and the central shading lens 32 is defined with a maximum outer diameter of DL, which satisfy the following conditions: CL = 0.56 mm; DL = 11.15 mm; and CL / DL = 0.05.

[0169] like Figure 14 As shown, on a projection plane perpendicular to the central axis AL, the closest distance between the recessed edge EG1 and the central axis AL is ND. The central light-blocking lens 32 is defined with a maximum outer diameter DL, which satisfies the following conditions: ND = 3.59 mm; DL = 11.15 mm; and ND×2 / DL = 0.644. The center of the maximum outer diameter DL passes through the central axis AL.

[0170] like Figure 14 As shown, on a projection plane of the vertical central axis AL, the central shading area RG1 is defined with a maximum shading length of CL, and the closest distance between the inner edge EG1 and the central axis AL is ND, which satisfies the following conditions: CL = 0.56 mm; ND = 3.59 mm; and CL / (ND×2) = 0.078.

[0171] like Figure 11 As shown, the field of view (FOV) of the imaging lens 30 satisfies the following condition: FOV = 13.6 degrees. The field of view of the imaging lens 30 corresponds to the maximum image height of the electronic image sensor IS (unless otherwise labeled, please refer to...). Figure 11(The intersection of the optical path and the electronic photosensitive element IS).

[0172] like Figure 12 As shown, the shortest distance between the edge of the image-side optical effective surface 3222 away from the central axis AL and the first optical surface 321 is ET. The central axis AL passes through the center of the central light-blocking lens 32 and defines a central thickness of the central light-blocking lens 32 as CT, which satisfies the following conditions: ET = 0.37 mm; CT = 0.97 mm; and ET / CT = 0.381.

[0173] like Figure 11 and Figure 14 As shown, on a projection plane of the vertical central axis AL, the central shading area RG1 is defined with a maximum shading length of CL and a minimum through hole with a through hole diameter of BD, which satisfy the following conditions: CL = 0.56 mm; BD = 10.14 mm; and CL / BD = 0.06.

[0174] like Figure 11 and Figure 14 As shown, on a projection plane perpendicular to the central axis AL, the most image-side lens 34 is defined with an outer diameter of DI, and the central shading lens 32 is defined with a maximum outer diameter of DL, which satisfy the following conditions: DI = 10.5 mm; DL = 11.15 mm; and DI / DL = 0.942.

[0175] In this embodiment, as Figure 15 As shown, these protruding structures PT1 are arranged sequentially along the direction surrounding the central axis AL, and each of these protruding structures PT1 extends radially from the central axis AL in a radial pattern, but this invention is not limited thereto. For example, please refer to... Figure 16 and Figure 17 Each of the above figures is an enlarged three-dimensional schematic diagram of an extinction structure according to another embodiment of the present invention.

[0176] exist Figure 16 In the embodiment, these protrusion structures PT2 are coaxial ring structures, wherein the outer protrusion structure PT2 may have a greater protrusion height than the inner protrusion structure PT2, but this utility model is not limited thereto.

[0177] exist Figure 17 In the embodiment, these protruding structures PT3 are arranged sequentially along the central axis AL to form an array pattern. This array pattern can be symmetrical about the central axis AL, and each protruding structure PT3 is conical, but this utility model is not limited thereto.

[0178] <Fourth Embodiment>

[0179] Please refer to Figure 18 and Figure 19 ,in Figure 18 A perspective view of one side of an electronic device according to a fourth embodiment of the present invention is shown, and Figure 19 Draw Figure 18 A three-dimensional diagram of the other side of the electronic device.

[0180] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes multiple 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).

[0181] These camera modules include an ultra-wide-angle camera module 400a, a high-resolution camera module 400b, and a telephoto camera module 400c. The telephoto camera module 400c, for example, includes the imaging lens of this invention and an electronic image sensor (not shown), wherein the electronic image sensor is disposed on the imaging surface of the imaging lens. However, this invention is not limited thereto. Camera modules 400a and 400b may also include the imaging lens of this invention.

[0182] The 400a ultra-wide-angle camera module has the ability to capture multiple scenes. Figure 20 A schematic diagram illustrating images captured by the ultra-wide-angle camera module 400a.

[0183] The high-resolution camera module 400b features high resolution and low distortion. The high-resolution camera module 400b can further capture… Figure 20 A portion of the image. Figure 21 A schematic diagram illustrating images captured by a high-resolution camera module 400b.

[0184] The telephoto camera module 400c features high magnification. The telephoto camera module 400c can further capture... Figure 21 A portion of the image. Figure 22 A schematic diagram illustrating images captured by a telephoto camera module 400c.

[0185] When a user photographs a subject, the electronic device 400 uses an ultra-wide-angle camera module 400a, a high-resolution camera module 400b, or a telephoto camera module 400c to focus the light for image capture, activates the flash module 401 for supplemental lighting, and uses the subject distance information provided by the focus assist module 402 for fast focusing. Furthermore, the image signal processor 403 performs image optimization processing to further improve the image quality produced by the camera module, while also providing zoom functionality. The focus assist module 402 can employ an infrared or laser focus assist system to achieve fast focusing. The display module 404 can be a touchscreen with touch functionality, allowing manual adjustment of the shooting angle, switching between different camera modules, and utilizing the diverse functions of the image software processor for image capture and processing (or shooting can be performed using a physical shooting button). The image processed by the image software processor can be displayed on the display module 404.

[0186] <Fifth Embodiment>

[0187] Please refer to Figure 23 The diagram illustrates a perspective view of one side of an electronic device according to a fifth embodiment of the present invention.

[0188] In this embodiment, the electronic device 500 is a smartphone. The electronic device 500 includes camera modules 500a, 500b, 500c, 500d, 500e, 500f, 500g, 500h, and 500i, a flash module 501, an image signal processor, a display module, and an image software processor (not shown). Camera modules 500a, 500b, 500c, 500d, 500e, 500f, 500g, 500h, and 500i are all located on the same side of the electronic device 500, while the display module is located on the other side of the electronic device 500. Among them, camera modules 500a, 500b and 500c respectively include imaging lenses and an electronic photosensitive element (not shown) according to different embodiments of the present invention, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens.

[0189] Camera module 500a is a telephoto camera module with a reversible optical path; camera module 500b is a telephoto camera module with a reversible optical path; camera module 500c is a telephoto camera module; camera module 500d is a telephoto camera module; camera module 500e is a wide-angle camera module; camera module 500f is a wide-angle camera module; camera module 500g is an ultra-wide-angle camera module; camera module 500h is a Time of Flight (ToF) camera module; and camera module 500i is an ultra-wide-angle camera module. In this embodiment, camera modules 500i, 500a, 500b, 500c, 500d, 500e, 500f, and 500g have different viewing angles, allowing the electronic device 500 to provide different magnification ratios to achieve optical zoom shooting effects. Furthermore, camera modules 500a and 500b are telephoto camera modules configured with light-deflecting elements (such as reflective elements). Additionally, camera module 500h can acquire depth information of the image. The electronic device 500 described above is exemplified by including multiple camera modules 500a, 500b, 500c, 500d, 500e, 500f, 500g, 500h, and 500i, but the number and configuration of the camera modules are not intended to limit this invention. When a user photographs a subject, the electronic device 500 uses camera modules 500a, 500b, 500c, 500d, 500e, 500f, 500g, 500h, or 500i to focus light for image capture, activates the flash module 501 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be elaborated upon here.

[0190] <Sixth Embodiment>

[0191] Please refer to Figures 24 to 26 ,in Figure 24 A perspective view of an electronic device according to the sixth embodiment of the present invention is shown. Figure 25 Draw Figure 24 A side view of the electronic device, and Figure 26 Draw Figure 24 A top view of the electronic device.

[0192] In this embodiment, the electronic device 600 is a car. The electronic device 600 includes a plurality of automotive camera modules 600a, and these camera modules 600a each include, for example, the imaging lens of this invention and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of these imaging lenses. These camera modules 600a can be applied, for example, to panoramic driving assistance systems, dashcams, and reversing cameras.

[0193] like Figure 24 As shown, the camera module 600a can be installed, for example, around the vehicle body to capture images of the car's surroundings, helping to identify road conditions outside the vehicle and thus enabling automated driving assistance functions. Furthermore, the images can be combined into a panoramic view using image software processors, providing images of the driver's blind spots, allowing the driver to monitor the surroundings of the vehicle for easier driving and parking.

[0194] like Figure 25 As shown, the camera module 600a can be installed, for example, below the left and right rearview mirrors respectively. The viewing angle of the camera module 600a can be 40 degrees to 90 degrees to capture image information within the range of the left and right lanes.

[0195] like Figure 26 As shown, the camera module 600a can also be installed, for example, in or below the left and right rearview mirrors and inside the front and rear windshields, thereby helping the driver obtain information about the external space outside the cockpit, providing more perspectives to reduce blind spots and improve driving safety.

[0196] The imaging lens and camera module of this invention are not limited to applications in smartphones, panoramic driving assistance systems, dashcams, and reversing cameras. They can be applied to various mobile focusing systems as needed, and feature excellent aberration correction and good image quality. For example, the imaging lens and camera module can be used in a wide range of electronic devices, including 3D image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring equipment, multi-lens devices, recognition systems, drones, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of this invention and do not limit the scope of application of the imaging lens and camera module.

[0197] Although the present invention has been disclosed above with reference to the foregoing embodiments, these embodiments are not intended to limit the present invention. Any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention. For the scope of protection defined by the present invention, please refer to the appended claims.

Claims

1. An imaging lens, characterized in that, Include: Multiple lenses are arranged sequentially from the object side to the image side according to the optical path. A central axis of the imaging lens passes through the center of each lens. Each lens includes a central light-blocking lens, and the central light-blocking lens includes: A first optical surface, through which the central axis passes; and A second optical surface is disposed opposite to the first optical surface; The second optical surface comprises: A central shading area, the central axis passing through the central shading area, and the central shading area comprising a shading layer; and An optically transparent area is adjacent to the central light-blocking area, and the optically transparent area surrounds the central light-blocking area; The inner and outer sides of the central shading area both have low reflectivity.

2. The imaging lens according to claim 1, characterized in that, The number of lenses is N, and the number of lenses disposed on the image side of the central light-blocking lens is M, which satisfies the following condition: N×0.5 ≤ M.

3. The imaging lens according to claim 2, characterized in that, The central light-blocking lens is the lens closest to the object side among all lenses.

4. The imaging lens according to claim 1, characterized in that, It also includes a reflective element, wherein the central light-blocking lens is disposed on the object side of the reflective element.

5. The imaging lens according to claim 4, characterized in that, The reflective element comprises multiple reflective surfaces.

6. The imaging lens according to claim 1, characterized in that, The first optical surface is disposed on the object side of the central light-blocking lens, and the second optical surface is disposed on the image side of the central light-blocking lens.

7. The imaging lens according to claim 6, characterized in that, The first optical surface includes an object-side optically effective surface, and the optically transparent area of ​​the second optical surface includes an image-side optically effective surface. The image-side optically effective surface is adjacent to the central light-blocking area, and the optical path passes sequentially through the object-side optically effective surface and the image-side optically effective surface; and Wherein, in the direction parallel to the central axis, the longest distance from the central axis to the edge of the object-side optical effective surface away from the central axis of the first optical surface is SL1, and the longest distance from the central axis to the edge of the image-side optical effective surface away from the central axis of the second optical surface is SL2, which satisfies the following condition: 0.04 ≤ SL2 / SL1 ≤ 0.

35.

8. The imaging lens according to claim 1, characterized in that, The light-shielding layer includes multiple protruding edges adjacent to the optically transparent area. The protruding edges are arranged sequentially around the central axis, and each protruding edge gradually tapers away from the central axis.

9. The imaging lens according to claim 1, characterized in that, The surface of the central light-shielding area is provided with an anti-glare structure, and the anti-glare structure is rougher than the surface of the optically transparent area; and The surface roughness difference between the extinction structure and the optically transparent region is ΔR, which satisfies the following condition: Ra 0.1 μm ≤ ΔR ≤ Ra 7.0 μm, where Ra is the arithmetic mean roughness.

10. The imaging lens according to claim 1, characterized in that, The surface of the central shading area is provided with an anti-glare structure, which includes multiple protrusions arranged sequentially along the central axis.

11. The imaging lens according to claim 1, characterized in that, The central shading area includes: A wall extending from the side of the optically transparent area adjacent to the central axis toward the first optical surface; and One bottom surface connects to the side of the wall surface away from the optically transparent area; The light-shielding layer is disposed on the wall surface and the bottom surface.

12. The imaging lens according to claim 1, characterized in that, On a projection plane perpendicular to the central axis, the central shading area is defined with a maximum shading length of CL, and the central shading lens is defined with a maximum outer diameter of DL, which satisfy the following conditions: 0.03 ≤ CL / DL ≤ 0.

33.

13. The imaging lens according to claim 1, characterized in that, The central light-blocking lens is a non-circular lens and includes an inwardly tapering edge, which tapers inward toward the central axis; and Wherein, on a projection plane perpendicular to the central axis, the closest distance between the recessed edge and the central axis is ND, the central light-blocking lens is defined with a maximum outer diameter of DL, and the central light-blocking area is defined with a maximum light-blocking length of CL, which satisfy the following conditions: 0.49 ≤ ND×2 / DL ≤ 0.9; and 0.04 ≤ CL / (ND×2) ≤ 0.

45.

14. The imaging lens according to claim 1, characterized in that, The imaging lens has a field of view (FOV) and satisfies the following conditions: 6 degrees ≤ FOV ≤ 65 degrees.

15. The imaging lens according to claim 1, characterized in that, The optically transparent area of ​​the second optical surface includes an image-side optically effective surface, which is adjacent to the central light-blocking area, and the optical path passes through the image-side optically effective surface; and Wherein, the shortest distance between the edge of the image-side effective optical surface away from the central axis and the first optical surface is ET, the central axis passes through the center of the central light-blocking lens and a central thickness of the central light-blocking lens is defined as CT, which satisfies the following conditions: 0.13 ≤ ET / CT ≤ 0.

95.

16. The imaging lens according to claim 1, characterized in that, It also includes a lens barrel, wherein a central light-blocking lens is disposed in the lens barrel, the lens barrel includes a minimum through hole, and the central axis passes through the minimum through hole; and On a projection plane perpendicular to the central axis, the central shading area is defined with a maximum shading length of CL, and the minimum through hole is defined with a through hole diameter of BD, which satisfies the following conditions: 0.03 ≤ CL / BD ≤ 0.

52.

17. The imaging lens according to claim 1, characterized in that, The lens further includes an image-side lens, which is the lens closest to the image side of the entire lens assembly; and On a projection plane perpendicular to the central axis, the most image-side lens is defined with an outer diameter of DI, and the central light-blocking lens is defined with a maximum outer diameter of DL, which satisfy the following conditions: 0.6 ≤ DI / DL ≤ 1.

4.

18. The imaging lens according to claim 1, characterized in that, The second optical surface of the central light-blocking lens further includes a peripheral light-blocking area, and the peripheral light-blocking area is located on the side of the optical light-transmitting area away from the central light-blocking area.

19. The imaging lens according to claim 1, characterized in that, The lens comprises a first lens group and a second lens group, the second lens group being disposed on the image side of the first lens group, and both the first and second lens groups having at least one lens; and The central light-blocking lens is located in the first group of mirrors, and the distance between the first group of mirrors and the second group of mirrors in the optical axis direction is variable.

20. A camera module, characterized in that, Include: The imaging lens according to claim 1; and An electronic photosensitive element is disposed on an imaging surface of the imaging lens.

21. An electronic device, characterized in that, Include: The camera module according to claim 20.

22. An imaging lens, characterized in that, Include: Multiple lenses are arranged sequentially from the object side to the image side according to the optical path. A central axis of the imaging lens passes through the center of each lens. Each lens includes a central light-blocking lens, and the central light-blocking lens includes: A first optical surface, through which the central axis passes; and A second optical surface is disposed opposite to the first optical surface; The second optical surface comprises: A central shading area, the central axis passing through the central shading area, and the central shading area comprising a shading layer; and An optically transparent area is adjacent to the central light-blocking area, and the optically transparent area surrounds the central light-blocking area; The central shading area is provided with an anti-light structure, and at least a portion of the shading layer is disposed on the anti-light structure.

23. The imaging lens according to claim 22, characterized in that, The extinction structure is rougher than the surface of the optically transparent area; and The surface roughness difference between the extinction structure and the optically transparent region is ΔR, which satisfies the following condition: Ra 0.1 μm ≤ ΔR ≤ Ra 7.0 μm, where Ra is the arithmetic mean roughness.

24. The imaging lens according to claim 22, characterized in that, The extinction structure comprises multiple protrusions, which are arranged sequentially along the central axis.

25. The imaging lens according to claim 22, characterized in that, The number of lenses is N, and the number of lenses disposed on the image side of the central light-blocking lens is M, which satisfies the following condition: N×0.5 ≤ M.

26. The imaging lens according to claim 22, characterized in that, The first optical surface is disposed on the object side of the central light-blocking lens, and the second optical surface is disposed on the image side of the central light-blocking lens; Wherein, the first optical surface includes an object-side optically effective surface, the optically transparent area of ​​the second optical surface includes an image-side optically effective surface, the image-side optically effective surface is adjacent to the central light-blocking area, and the optical path passes sequentially through the object-side optically effective surface and the image-side optically effective surface; and Wherein, in the direction parallel to the central axis, the longest distance from the central axis to the edge of the object-side optical effective surface away from the central axis of the first optical surface is SL1, and the longest distance from the central axis to the edge of the image-side optical effective surface away from the central axis of the second optical surface is SL2, which satisfies the following condition: 0.04 ≤ SL2 / SL1 ≤ 0.

35.

27. The imaging lens according to claim 22, characterized in that, On a projection plane perpendicular to the central axis, the central shading area is defined with a maximum shading length of CL, and the central shading lens is defined with a maximum outer diameter of DL, which satisfy the following conditions: 0.03 ≤ CL / DL ≤ 0.

33.

28. The imaging lens according to claim 22, characterized in that, The optically transparent area of ​​the second optical surface includes an image-side optically effective surface, which is adjacent to the central light-blocking area, and the optical path passes through the image-side optically effective surface; and Wherein, the shortest distance between the edge of the image-side effective optical surface away from the central axis and the first optical surface is ET, the central axis passes through the center of the central light-blocking lens and a central thickness of the central light-blocking lens is defined as CT, which satisfies the following conditions: 0.13 ≤ ET / CT ≤ 0.

95.

29. The imaging lens according to claim 22, characterized in that, The lens further includes an image-side lens, which is the lens closest to the image side of the entire lens assembly; and On a projection plane perpendicular to the central axis, the most image-side lens is defined with an outer diameter of DI, and the central light-blocking lens is defined with a maximum outer diameter of DL, which satisfy the following conditions: 0.6 ≤ DI / DL ≤ 1.4.

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