Imaging lens and electronic device
By incorporating columnar protrusions and a light-absorbing coating on the surface of the plastic lens, the problem of insufficient image quality of optical lenses under high-intensity stray light is solved, achieving the effect of effectively reducing stray light reflection and improving lens image quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-03-17
AI Technical Summary
Existing optical lenses have insufficient image quality under high-intensity stray light conditions, existing reflectivity reduction technologies are not very effective, and the anti-reflection structure is not sufficiently supportive, making the film layer prone to deformation due to environmental factors.
The design employs a plastic lens with columnar protrusions arranged in a two-dimensional array on the lens surface. The bottom contour of the columnar protrusions is arc-shaped, and the top is a rounded surface. The appropriate density and angle are configured to reduce stray light, and combined with a light-absorbing coating, reflection is further reduced.
It effectively reduces stray light reflection, improves the optical imaging quality of the imaging lens and the weather resistance of the anti-reflection structure, and enhances the lens assembly precision and structural stability.
Smart Images
Figure CN224005292U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an imaging lens and an electronic device, and more particularly to an imaging lens 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, optical lenses with high image quality have become an indispensable component. Furthermore, with the rapid development of technology, mobile devices equipped with optical lenses are being used in a wider range of applications, leading to more diverse requirements for these lenses.
[0003] In recent years, it has become increasingly popular to take photos using miniature optical lenses on mobile devices. However, mobile devices are often exposed to strong sunlight when used outdoors, which causes the optical lenses to be affected by strong non-imaging stray light. In particular, non-imaging light is easily reflected within the optical lens, which greatly reduces the image quality.
[0004] Existing technologies, such as ink coating, sandblasting, and film coating, are used on the surfaces of optical elements in optical lenses to reduce reflectivity and eliminate stray light. While these techniques improve optical image quality, they are insufficient to eliminate high-intensity stray light. Furthermore, other reflectivity reduction technologies exist in the field of non-mobile device optical lenses, which create porous microstructures on the surface of the film. However, these technologies lack structural support and are easily deformed by environmental factors, significantly reducing their anti-reflective effect. Therefore, improving the structure of internal components of optical lenses to reduce the intensity of non-imaging light reflection to meet the high-specification requirements of today's electronic devices has become an important issue in this field. Utility Model Content
[0005] In view of the above-mentioned problems, this utility model provides an imaging lens and electronic device that helps maintain the low reflectivity of the surface of optical elements such as lenses and the strength of the anti-reflection structure, reduces the reflection of non-imaging light, and improves the weather resistance of the anti-reflection structure, thereby effectively improving the optical imaging quality of the imaging lens.
[0006] This invention provides an imaging lens comprising a plastic lens. The plastic lens has a central axis and includes an optically active portion and a peripheral portion. The central axis passes through the center of the optically active portion. The peripheral portion is disposed adjacent to the optically active portion and includes a first side surface, a second side surface, and a connecting surface. The second side surface and the first side surface are disposed opposite each other in a direction parallel to the central axis. The connecting surface connects the first side surface and the second side surface, and the connecting surface is further away from the central axis relative to the first side surface and the second side surface. At least one of the first side surface and the second side surface has a structural region. The plastic lens also includes a plurality of columnar protrusions disposed in the structural region and arranged in a two-dimensional array. The columnar protrusions are connected to the structural region and extend in a direction away from the structural region, wherein each of these columnar protrusions has an opposing bottom and a top, the outline of each bottom being arc-shaped and connected to the structural region, and each top having an arc-shaped surface. The projected area of the structural region on a plane perpendicular to the central axis is A1, and the number of columnar protrusions is N1, which satisfies the following condition: 250mm -2 <N1 / A1<1500mm -2 .
[0007] This invention provides an electronic device 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] According to the imaging lens and electronic device disclosed in this invention, by configuring these columnar protrusions to a suitable density, a better stray light reduction effect can be provided. Furthermore, the arc-shaped bottom profile of the columnar protrusions helps to reduce stray light between the protrusions, while the rounded top surface facilitates the manufacturing and shaping of the columnar protrusions.
[0009] The above description of the present invention and the following description of the embodiments are used to demonstrate and explain the principles of the present invention, and to provide a further explanation of the claims of the present invention. Attached Figure Description
[0010] Figure 1 A cross-sectional schematic diagram of an imaging lens according to the first embodiment of the present invention is shown.
[0011] Figure 2 Draw Figure 1 A magnified diagram of region EL2.
[0012] Figure 3 Draw Figure 1 A three-dimensional schematic diagram of the first plastic lens.
[0013] Figure 4 Draw Figure 3 An enlarged schematic diagram of region EL4.
[0014] Figure 5 Draw Figure 1 A top view of the first plastic lens.
[0015] Figure 6 Draw Figure 5 A cross-sectional view of the first plastic lens along section line 6-6.
[0016] Figure 7 Draw Figure 1 An enlarged schematic diagram of region EL7.
[0017] Figure 8 Draw Figure 1 An enlarged schematic diagram of region EL8.
[0018] Figure 9 Draw Figure 1 A three-dimensional schematic diagram of the second plastic lens.
[0019] Figure 10 Draw Figure 9 An enlarged schematic diagram of region EL10.
[0020] Figure 11 Draw Figure 1 A top view of the second plastic lens.
[0021] Figure 12 Draw Figure 11 A cross-sectional view of the second plastic lens along section line 12-12.
[0022] Figure 13 Draw Figure 12 An enlarged schematic diagram of region EL13.
[0023] Figure 14 Draw Figure 1 An enlarged schematic diagram of region EL14.
[0024] Figure 15 Draw Figure 1 A three-dimensional schematic diagram of the third plastic lens.
[0025] Figure 16 Draw Figure 15 An enlarged schematic diagram of region EL16.
[0026] Figure 17 Draw Figure 1 A top view of the third plastic lens.
[0027] Figure 18 Draw Figure 17 A cross-sectional view of the third plastic lens along section line 18-18.
[0028] Figure 19 Draw Figure 18 An enlarged schematic diagram of region EL19.
[0029] Figure 20 A cross-sectional schematic diagram of an imaging lens according to a second embodiment of the present invention is shown.
[0030] Figure 21 Draw Figure 20 An enlarged schematic diagram of region EL21.
[0031] Figure 22 Draw Figure 20 A three-dimensional schematic diagram of a plastic lens.
[0032] Figure 23 Draw Figure 22 An enlarged schematic diagram of region EL23.
[0033] Figure 24 Draw Figure 20 A diagram showing the plastic lens viewed from below.
[0034] Figure 25 Draw Figure 24 A cross-sectional view of the plastic lens along section line 25-25.
[0035] Figure 26 Draw Figure 20 An enlarged schematic diagram of region EL26.
[0036] Figure 27 A cross-sectional schematic diagram of an imaging lens according to a third embodiment of the present invention is shown.
[0037] Figure 28 Draw Figure 27 An enlarged schematic diagram of region EL28.
[0038] Figure 29 Draw Figure 27 A three-dimensional schematic diagram of a plastic lens.
[0039] Figure 30 Draw Figure 29 An enlarged schematic diagram of region EL30.
[0040] Figure 31 Draw Figure 27 A top view of the plastic lens.
[0041] Figure 32 Draw Figure 31 A cross-sectional view of the plastic lens along section line 32-32.
[0042] Figure 33 Draw Figure 32 An enlarged schematic diagram of region EL33.
[0043] Figure 34 A perspective view of one side of an electronic device according to a fourth embodiment of the present invention is shown.
[0044] Figure 35 Draw Figure 34 A three-dimensional diagram of the other side of the electronic device.
[0045] Figure 36 A schematic diagram illustrating the image captured by the ultra-wide-angle camera module.
[0046] Figure 37 A schematic diagram illustrating the image captured by a high-resolution camera module.
[0047] Figure 38 A schematic diagram illustrating the image captured by a telephoto camera module.
[0048] Figure 39 A perspective view of one side of an electronic device according to the fifth embodiment of this utility model is shown.
[0049] Figure 40 A three-dimensional schematic diagram of an electronic device according to the sixth embodiment of this utility model is shown.
[0050] Figure 41 Draw Figure 40 A side view of the electronic device.
[0051] Figure 42 Draw Figure 40 A top view of the electronic device.
[0052] [Symbol Explanation]
[0053] 1,2,3: Imaging lens
[0054] 11, 21, 31: Lens tube
[0055] E0, E1, E2, E3, E4, E5: Lenses
[0056] E10, E20, E30, E40, E50: Effective optical part
[0057] E12, E22, E32, E42, E52: Peripheral Section
[0058] S11, S21, S31, S41, S51: First side
[0059] R1, R2, R3, R4, R5: Structural regions
[0060] S12, S22, S32, S42, S52: Second side
[0061] S13, S23, S33, S43, S53: Connecting surfaces
[0062] E14, E24, E34, E44, E54: Columnar protrusions
[0063] B1, B2, B3, B4, B5: Bottom
[0064] T1, T2, T3, T4, T5: Top
[0065] E56: Light-absorbing coating
[0066] 13: Light-blocking sheet
[0067] 15: Fixing ring
[0068] 27: Adhesive components
[0069] IMG: Imaging Surface
[0070] CL: Central axis
[0071] θ: Angle between the surface of the structural region and the central axis
[0072] H1: The height of the columnar protrusion in the direction parallel to the central axis.
[0073] P1: The distance between any two adjacent columnar protrusions
[0074] 200, 300, 400: Electronic devices
[0075] 201,301: Flash module
[0076] 202: Focusing Assist Module
[0077] 203: Image Signal Processor
[0078] 204: Display Module
[0079] 200a, 200b, 200c, 200d, 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, 300i, 400a: Camera modules Detailed Implementation
[0080] 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.
[0081] This invention provides an imaging lens comprising a plastic lens. The plastic lens has a central axis and includes an effective optical portion and a peripheral portion. The central axis passes through the center of the effective optical portion, and the peripheral portion is disposed adjacent to and around the effective optical portion.
[0082] The peripheral portion includes a first side surface, a second side surface, and a connecting surface. The second side surface and the first side surface are disposed opposite each other in a direction parallel to the central axis. The connecting surface connects the first side surface and the second side surface, and the connecting surface is further away from the central axis relative to the first side surface and the second side surface. At least one of the first side surface and the second side surface has a structural region. The first side surface and the second side surface may, for example, face the object side and the image side, respectively, but this invention is not limited thereto.
[0083] The plastic lens further comprises a plurality of columnar protrusions, which are disposed in the structural area and arranged in a two-dimensional array. The array may be, for example, a circular array, a linear array, or a curved array, but this invention is not limited thereto. The extent of the structural area can be defined by the arrangement of these columnar protrusions. For example, when these columnar protrusions are arranged in a circular array on the first or second side, the innermost columnar protrusions can define an inscribed circle, and the outermost columnar protrusions can define a circumscribed circle. Thus, the area formed between the inscribed circle and the circumscribed circle is the extent of the structural area.
[0084] These columnar protrusions connect to the structural area and extend outwards from it. Each columnar protrusion has a bottom and a top, with the bottom having an arcuate profile and connecting to the structural area, and each top having an arcuate surface. The arcuate bottom profile of the columnar protrusions helps to reduce stray light between them, while the arcuate top surface facilitates the manufacturing and shaping of the protrusions. The arcuate bottom profile can, for example, mean that the cross-section of the bottom is circular or elliptical, and this invention is not limited thereto. The arcuate top surface can, for example, be a sphere or an ellipsoid, and this invention is not limited thereto.
[0085] The projected area of the structural region on a plane perpendicular to the central axis is A1, and the number of these columnar protrusions is N1, which satisfies the following condition: 250mm -2 <N1 / A1<1500mm -2 Therefore, by configuring these columnar protrusions to a suitable density, a better effect can be achieved in reducing stray light. The following condition can also be met: 450mm -2 <N1 / A1<1100mm -2 The following condition can also be met: 500mm -2 <N1 / A1<800mm -2 .
[0086] The number of these columnar protrusions is N1, which can satisfy the following conditions: 746 < N1 < 4500. Thereby, by configuring these columnar protrusions to a suitable number, a better effect of reducing stray light can be provided. Among them, the following conditions can also be satisfied: 783 < N1 < 2330. Among them, the following conditions can also be satisfied: 814 < N1 < 1513.
[0087] The angle between the surface of the structural region and the central axis is θ, which can satisfy the following conditions: 0.86 < sinθ ≤ 1. Thereby, configuring appropriate angle parameters is beneficial for stray light to enter between these columnar protrusions in the structural region, weakening the stray light between these columnar protrusions, and at the same time contributing to improving the forming quality of the columnar protrusions. Among them, the following conditions can also be satisfied: 0.96 < sinθ < 1. Please refer to Figure 2 , which shows a schematic diagram of the parameter θ in the first embodiment of the present utility model.
[0088] The protrusion height of each columnar protrusion in the direction parallel to the central axis is H1, and the distance between any two adjacent columnar protrusions is P1, which can satisfy the following conditions: 0.2 < H1 / P1 < 0.8. Thereby, it is beneficial for weakening the stray light between the columnar protrusions. Among them, the following conditions can also be satisfied: 0.4 < H1 / P1 < 0.67. The protrusion height can refer to the height of the center of a single columnar protrusion protruding from the structural region in the direction parallel to the central axis, and the distance can refer to the distance between the center of one columnar protrusion and the center of an adjacent columnar protrusion. Please refer to Figure 7 , which shows a schematic diagram of the parameters H1 and P1 in the first embodiment of the present utility model.
[0089] The direction in which each columnar protrusion extends and protrudes from the structural region can be parallel to the central axis. Thereby, it is beneficial for improving the forming quality of the columnar protrusions.
[0090] The imaging lens of the present utility model may further include an optical element, the optical element is disposed adjacent to the plastic lens, and the tops of these columnar protrusions of the plastic lens can be in physical contact with the optical element. Thereby, the bearing stress between the optical element and the plastic lens can be buffered to avoid deformation of the plastic lens or the optical element. The optical element can be, for example, a lens barrel, a lens, a light shielding sheet, a spacer ring, a fixing ring or a filter element, etc., and the present utility model is not limited thereto.
[0091] The plastic lens may further include a light absorption coating, and the light absorption coating can cover the structural region and is used to reduce light reflection. Thereby, the reflection chance of stray light can be further reduced.
[0092] The surface of the columnar protrusion can be smooth. This avoids damage to optical components adjacent to the plastic lens, thereby preventing any impact on the lens assembly accuracy.
[0093] The imaging lens of this invention may further include an adhesive element for fixing the plastic lens, and these columnar protrusions can contact the adhesive element solidly. This prevents the adhesive element from overflowing and affecting other areas (e.g., the optical effective part).
[0094] This invention provides an electronic device 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.
[0095] The various technical features disclosed in the imaging lens of this utility model can be combined and configured to achieve the corresponding effects.
[0096] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.
[0097] <First Embodiment>
[0098] Please refer to Figures 1 to 7 ,in Figure 1 A cross-sectional schematic diagram of an imaging lens according to the first embodiment of the present invention is shown. Figure 2 Draw Figure 1 An enlarged schematic diagram of region EL2. Figure 3 Draw Figure 1 A three-dimensional schematic diagram of the first plastic lens. Figure 4 Draw Figure 3 An enlarged schematic diagram of region EL4. Figure 5 Draw Figure 1 A top view of the first plastic lens. Figure 6 Draw Figure 5 A cross-sectional view of the first plastic lens along section line 6-6, and Figure 7 Draw Figure 1 An enlarged schematic diagram of region EL7.
[0099] The imaging lens 1 of this embodiment includes a lens barrel 11, a plurality of lenses E0, E1, E2 and E3, a light shield 13, a fixing ring 15, and an imaging surface IMG. The lenses E0, E1, E2 and E3, the light shield 13 and the fixing ring 15 are all housed within the lens barrel 11, and after light enters the lens barrel 11, it passes through the lenses E0, E1, E2 and E3, the light shield 13 and the fixing ring 15 to become imaging light and be imaged on the imaging surface IMG.
[0100] These lenses E0, E1, E2 and E3 include a first plastic lens E1, a second plastic lens E2 and a third plastic lens E3, wherein the third plastic lens E3 is closer to the imaging plane IMG than the first plastic lens E1, and the second plastic lens E2 is located between the first plastic lens E1 and the third plastic lens E3.
[0101] The light-shielding plate 13 is disposed adjacent to the third plastic lens E3, and the light-shielding plate 13 is located between the second plastic lens E2 and the third plastic lens E3. Furthermore, the light-shielding plate 13 is used to block non-imaging light.
[0102] The retaining ring 15 makes physical contact with the third plastic lens E3, and the retaining ring 15 is used to fix these lenses E0, E1, E2 and E3.
[0103] like Figure 3 , Figure 5 and Figure 6 As shown, the first plastic lens E1 has a central axis CL, and the first plastic lens E1 includes an optically active portion E10, a peripheral portion E12, and a plurality of columnar protrusions E14. The central axis CL passes through the center of the optically active portion E10, and the peripheral portion E12 is disposed adjacent to the periphery of the optically active portion E10.
[0104] The peripheral portion E12 includes a first side surface S11, a second side surface S12, and a connecting surface S13. The second side surface S12 and the first side surface S11 are disposed opposite each other in a direction parallel to the central axis CL. The connecting surface S13 connects the first side surface S11 and the second side surface S12, and the connecting surface S13 is further away from the central axis CL relative to the first side surface S11 and the second side surface S12. The first side surface S11 has a structural region R1.
[0105] like Figures 3 to 5 As shown, these columnar protrusions E14 are disposed in the structural region R1 and arranged in a two-dimensional array. Specifically, these columnar protrusions E14 are arranged in a two-dimensional circular array.
[0106] like Figure 2 , Figure 6 and Figure 7 As shown, these columnar protrusions E14 are connected to the structural region R1 and extend outwards in a direction away from the structural region R1. Specifically, each of these columnar protrusions E14 has an opposing bottom B1 and a top T1. The outline of each bottom B1 is arc-shaped and connected to the structural region R1, and each top T1 has an arc-shaped surface. The direction in which each columnar protrusion E14 extends from the structural region R1 is parallel to the central axis CL, and the surfaces of these columnar protrusions E14 are smooth.
[0107] The number of these columnar protrusions E14 is N1, which satisfies the following condition: N1 = 300 × 2 = 600 (300 per ring, 2 rings in total).
[0108] like Figure 5 As shown, the projected area of structural region R1 on a plane perpendicular to the central axis CL is A1, and the number of these columnar protrusions E14 is N1, which satisfies the following condition: A1 = 0.5564 mm. 2 N1 = 600; and N1 / A1 = 1078.36 mm -2 .
[0109] like Figure 2 As shown, the angle between the surface of the structural region R1 and the central axis CL is θ, which satisfies the following conditions: θ = 85°; and sinθ = 0.996.
[0110] like Figure 7 As shown, the height of each columnar protrusion E14 in the direction parallel to the central axis CL is H1, and the distance between any two adjacent columnar protrusions E14 is P1, which satisfies the following conditions: H1 = 0.02 mm; P1 = 0.0364 mm; and H1 / P1 = 0.55.
[0111] In this embodiment, in addition to the columnar protrusion structure of the first plastic lens E1, the second plastic lens E2 may also be configured with a columnar protrusion structure. Specifically, please refer to... Figures 8 to 13 ,in Figure 8 Draw Figure 1 An enlarged diagram of region EL8. Figure 9 Draw Figure 1 A three-dimensional schematic diagram of the second plastic lens. Figure 10 Draw Figure 9 An enlarged schematic diagram of region EL10. Figure 11 Draw Figure 1 A top view of the second plastic lens. Figure 12 Draw Figure 11 A cross-sectional view of the second plastic lens along section line 12-12, and Figure 13 Draw Figure 12 An enlarged schematic diagram of region EL13.
[0112] like Figure 9 , Figure 11 and Figure 12 As shown, the second plastic lens E2 has a central axis CL, and the second plastic lens E2 includes an optically active portion E20, a peripheral portion E22, and a plurality of columnar protrusions E24. The central axis CL passes through the center of the optically active portion E20, and the peripheral portion E22 is disposed adjacent to and around the optically active portion E20.
[0113] The peripheral portion E22 includes a first side surface S21, a second side surface S22, and a connecting surface S23. The second side surface S22 and the first side surface S21 are disposed opposite each other in a direction parallel to the central axis CL. The connecting surface S23 connects the first side surface S21 and the second side surface S22, and the connecting surface S23 is further away from the central axis CL relative to the first side surface S21 and the second side surface S22. The first side surface S21 has a structural region R2.
[0114] like Figures 9 to 11 As shown, these columnar protrusions E24 are disposed in the structural region R2 and arranged in a two-dimensional array. Specifically, these columnar protrusions E24 are arranged in a two-dimensional circular array.
[0115] like Figure 8 , Figure 12 and Figure 13 As shown, these columnar protrusions E24 are connected to the structural region R2 and extend outwards in a direction away from the structural region R2. Specifically, each of these columnar protrusions E24 has an opposing bottom B2 and a top T2. The outline of each bottom B2 is arc-shaped and connected to the structural region R2, and each top T2 has an arc-shaped surface. The direction in which each columnar protrusion E24 extends from the structural region R2 is parallel to the central axis CL, and the surfaces of these columnar protrusions E24 are smooth.
[0116] The number of these columnar protrusions E24 is N1, which satisfies the following condition: N1 = 720 × 4 = 2880 (720 per circle, 4 circles in total).
[0117] like Figure 11 As shown, the projected area of structural region R2 on a plane perpendicular to the central axis CL is A1, and the number of these columnar protrusions E24 is N1, which satisfies the following condition: A1 = 3.8951 mm. 2 N1 = 2880; and N1 / A1 = 739.39 mm -2 .
[0118] like Figure 8 As shown, the angle between the surface of structural region R2 and the central axis CL is θ, which satisfies the following conditions: θ = 90°; and sinθ = 1.
[0119] like Figure 13 As shown, the height of each columnar protrusion E24 in the direction parallel to the central axis CL is H1, and the distance between any two adjacent columnar protrusions E24 is P1, which satisfies the following conditions: H1 = 0.02 mm; P1 = 0.04 mm; and H1 / P1 = 0.5.
[0120] In this embodiment, in addition to the columnar protrusions on the first plastic lens E1 and the second plastic lens E2, the third plastic lens E3 may also have a columnar protrusion structure. Specifically, please refer to... Figures 14 to 19 ,in Figure 14 Draw Figure 1 An enlarged schematic diagram of region EL14. Figure 15 Draw Figure 1 A three-dimensional schematic diagram of the third plastic lens. Figure 16 Draw Figure 15 An enlarged schematic diagram of region EL16. Figure 17 Draw Figure 1 A top view of the third plastic lens. Figure 18 Draw Figure 17 A cross-sectional view of the third plastic lens along section line 18-18, and Figure 19 Draw Figure 18 An enlarged schematic diagram of region EL19.
[0121] like Figure 15 , Figure 17 and Figure 18 As shown, the third plastic lens E3 has a central axis CL, and the third plastic lens E3 includes an optically active portion E30, a peripheral portion E32, and a plurality of columnar protrusions E34. The central axis CL passes through the center of the optically active portion E30, and the peripheral portion E32 is disposed adjacent to the periphery of the optically active portion E30.
[0122] The peripheral portion E32 includes a first side surface S31, a second side surface S32, and a connecting surface S33. The second side surface S32 and the first side surface S31 are disposed opposite each other in a direction parallel to the central axis CL. The connecting surface S33 connects the first side surface S31 and the second side surface S32, and the connecting surface S33 is further away from the central axis CL relative to the first side surface S31 and the second side surface S32. The first side surface S31 has a structural region R3.
[0123] like Figures 15 to 17 As shown, these columnar protrusions E34 are disposed in the structural region R3 and arranged in a two-dimensional array. Specifically, these columnar protrusions E34 are arranged in a two-dimensional circular array.
[0124] like Figure 14 , Figure 18 and Figure 19As shown, these columnar protrusions E34 are connected to the structural region R3 and extend outwards in a direction away from the structural region R3. Specifically, each of these columnar protrusions E34 has an opposing bottom B3 and a top T3. The outline of each bottom B3 is arc-shaped and connected to the structural region R3, and each top T3 has an arc-shaped surface. The direction in which each columnar protrusion E34 extends from the structural region R3 is parallel to the central axis CL, and the surfaces of these columnar protrusions E34 are smooth. Furthermore, the tops T3 of these columnar protrusions E34 of the third plastic lens E3 are in solid contact with the adjacent optical element (light-shielding plate 13).
[0125] The number of these columnar protrusions E34 is N1, which satisfies the following condition: N1 = 480 × 4 = 1920 (480 per ring, 4 rings in total).
[0126] like Figure 17 As shown, the projected area of structural region R3 on a plane perpendicular to the central axis CL is A1, and the number of these columnar protrusions E34 is N1, which satisfies the following condition: A1 = 7.6619 mm. 2 N1 = 1920; and N1 / A1 = 250.59 mm -2 .
[0127] like Figure 14 As shown, the angle between the surface of structural region R3 and the central axis CL is θ, which satisfies the following conditions: θ = 90°; and sinθ = 1.
[0128] like Figure 19 As shown, the height of each columnar protrusion E34 in the direction parallel to the central axis CL is H1, and the distance between any two adjacent columnar protrusions E34 is P1, which satisfies the following conditions: H1 = 0.04 mm; P1 = 0.08 mm; and H1 / P1 = 0.5.
[0129] <Second Embodiment>
[0130] Please refer to Figures 20 to 26 ,in Figure 20 A cross-sectional schematic diagram of an imaging lens according to a second embodiment of the present invention is shown. Figure 21 Draw Figure 20 An enlarged schematic diagram of region EL21. Figure 22 Draw Figure 20 A three-dimensional diagram of a plastic lens. Figure 23 Draw Figure 22 An enlarged schematic diagram of region EL23. Figure 24 Draw Figure 20 A diagram showing the plastic lens viewed from below. Figure 25 Draw Figure 24 A cross-sectional view of the plastic lens along section line 25-25, and Figure 26 Draw Figure 20 An enlarged schematic diagram of region EL26.
[0131] The imaging lens 2 of this embodiment includes a lens barrel 21, a plurality of lenses E0 and E4, an adhesive element 27, and an imaging surface IMG. The lenses E0 and E4 and the adhesive element 27 are all housed within the lens barrel 21, and light entering the lens barrel 21 passes through the lenses E0 and E4 to become imaging light and is imaged onto the imaging surface IMG.
[0132] These lenses E0 and E4 include a plastic lens E4, and the plastic lens E4 is closer to the imaging plane IMG than the other lenses E0 in the imaging lens 2.
[0133] Adhesive element 27 makes physical contact with plastic lens E4 and is used to fix these lenses E0 and E4.
[0134] like Figure 22 , Figure 24 and Figure 25 As shown, the plastic lens E4 has a central axis CL, and includes an optically active portion E40, a peripheral portion E42, and a plurality of columnar protrusions E44. The central axis CL passes through the center of the optically active portion E40, and the peripheral portion E42 is disposed adjacent to and around the optically active portion E40.
[0135] The peripheral portion E42 includes a first side surface S41, a second side surface S42, and a connecting surface S43. The second side surface S42 and the first side surface S41 are disposed opposite each other in a direction parallel to the central axis CL. The connecting surface S43 connects the first side surface S41 and the second side surface S42, and the connecting surface S43 is further away from the central axis CL relative to the first side surface S41 and the second side surface S42. The second side surface S42 has a structural region R4.
[0136] like Figures 21 to 24 As shown, these columnar protrusions E44 are disposed in the structural region R4 and arranged in a two-dimensional array. Specifically, these columnar protrusions E44 are arranged in a two-dimensional circular array and are in solid contact with the adhesive element 27.
[0137] like Figure 21 , Figure 25 and Figure 26 As shown, these columnar protrusions E44 are connected to the structural region R4 and extend outwards in a direction away from the structural region R4. Specifically, each of these columnar protrusions E44 has an opposing bottom B4 and a top T4. The outline of each bottom B4 is arc-shaped and connected to the structural region R4, and each top T4 has an arc-shaped surface. The direction in which each columnar protrusion E44 extends from the structural region R4 is parallel to the central axis CL, and the surfaces of these columnar protrusions E44 are smooth.
[0138] The number of these columnar protrusions E44 is N1, which satisfies the following condition: N1 = 720 × 3 = 2160 (720 per circle, 3 circles in total).
[0139] like Figure 24 As shown, the projected area of structural region R4 on a plane perpendicular to the central axis CL is A1, and the number of these columnar protrusions E44 is N1, which satisfies the following condition: A1 = 3.6373 mm. 2 N1 = 2160; and N1 / A1 = 593.85 mm -2 .
[0140] like Figure 21 As shown, the angle between the surface of structural region R4 and the central axis CL is θ, which satisfies the following conditions: θ = 90°; and sinθ = 1.
[0141] like Figure 26 As shown, the height of each columnar protrusion E44 in the direction parallel to the central axis CL is H1, and the distance between any two adjacent columnar protrusions E44 is P1, which satisfies the following conditions: H1 = 0.02 mm; P1 = 0.03 mm; and H1 / P1 = 0.66.
[0142] <Third Embodiment>
[0143] Please refer to Figures 27 to 33 ,in Figure 27 A cross-sectional schematic diagram of an imaging lens according to a third embodiment of the present invention is shown. Figure 28 Draw Figure 27 An enlarged schematic diagram of region EL28. Figure 29 Draw Figure 27 A three-dimensional diagram of a plastic lens. Figure 30 Draw Figure 29 An enlarged schematic diagram of region EL30. Figure 31 Draw Figure 27 A top view of the plastic lens. Figure 32 Draw Figure 31 A cross-sectional view of the plastic lens along section line 32-32, and Figure 33 Draw Figure 32 An enlarged schematic diagram of region EL33.
[0144] The imaging lens 3 of this embodiment includes a lens barrel 31, a plurality of lenses E0 and E5, and an imaging surface IMG. These lenses E0 and E5 are all housed within the lens barrel 31, and light entering the lens barrel 31 passes through these lenses E0 and E5 to become imaging light rays and image onto the imaging surface IMG.
[0145] These lenses E0 and E5 include a plastic lens E5, and the plastic lens E5 is closer to the subject than the other lenses E0 in the imaging lens 3.
[0146] like Figure 29 , Figure 31 and Figure 32 As shown, the plastic lens E5 has a central axis CL, and includes an optically active portion E50, a peripheral portion E52, a plurality of columnar protrusions E54, and a light-absorbing coating E56. The central axis CL passes through the center of the optically active portion E50, and the peripheral portion E52 is disposed adjacent to and around the optically active portion E50.
[0147] The peripheral portion E52 includes a first side surface S51, a second side surface S52, and a connecting surface S53. The second side surface S52 and the first side surface S51 are disposed opposite each other in a direction parallel to the central axis CL. The connecting surface S53 connects the first side surface S51 and the second side surface S52, and the connecting surface S53 is further away from the central axis CL relative to the first side surface S51 and the second side surface S52. The first side surface S51 has a structural region R5.
[0148] like Figures 29 to 31 As shown, these columnar protrusions E54 are disposed in the structural region R5 and arranged in a two-dimensional array. Specifically, these columnar protrusions E54 are arranged in a two-dimensional circular array.
[0149] like Figure 28 , Figure 32 and Figure 33 As shown, these columnar protrusions E54 are connected to the structural region R5 and extend outwards in a direction away from the structural region R5. Specifically, each of these columnar protrusions E54 has an opposing bottom B5 and a top T5. The outline of each bottom B5 is arc-shaped and connected to the structural region R5, and each top T5 has an arc-shaped surface. The direction in which each columnar protrusion E54 extends from the structural region R5 is parallel to the central axis CL, and the surfaces of these columnar protrusions E54 are smooth.
[0150] like Figure 28 and Figure 33 As shown, the light-absorbing coating E56 covers the structural region R5 and these columnar protrusions E54, and the light-absorbing coating E56 is used to reduce light reflection.
[0151] The number of these columnar protrusions E54 is N1, which satisfies the following condition: N1 = 360 × 5 = 1800 (360 per circle, 5 circles in total).
[0152] like Figure 31As shown, the projected area of structural region R5 on a plane perpendicular to the central axis CL is A1, and the number of these columnar protrusions E54 is N1, which satisfies the following condition: A1 = 2.9992 mm. 2 N1 = 1800; and N1 / A1 = 600.16 mm -2 .
[0153] like Figure 28 As shown, the angle between the surface of structural region R5 and the central axis CL is θ, which satisfies the following conditions: θ = 90°; and sinθ = 1.
[0154] like Figure 33 As shown, the height of each columnar protrusion E54 in the direction parallel to the central axis CL is H1, and the distance between any two adjacent columnar protrusions E54 is P1, which satisfies the following conditions: H1 = 0.01 mm; P1 = 0.04 mm; and H1 / P1 = 0.25.
[0155] <Fourth Embodiment>
[0156] Please refer to Figure 34 and Figure 35 ,in Figure 34 A perspective view of one side of an electronic device according to a fourth embodiment of the present invention is shown, and Figure 35 Draw Figure 34 A three-dimensional diagram of the other side of the electronic device.
[0157] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes multiple camera modules, a flash module 201, a focus assist module 202, an image signal processor 203, a display module (user interface) 204, an image software processor (not shown), and an electronic image sensor (not shown).
[0158] These camera modules include an ultra-wide-angle camera module 200a, a high-resolution camera module 200b, a telephoto camera module 200c, and a telephoto camera module 200d. At least one of the camera modules 200a, 200b, 200c, and 200d may include the imaging lens of this invention. An electronic photosensitive element is disposed on the imaging surface of these imaging lenses.
[0159] The ultra-wide-angle camera module 200a has the ability to capture multiple scenes. Figure 36 A schematic diagram illustrating images captured by the ultra-wide-angle camera module 200a.
[0160] The high-resolution camera module 200b features high resolution and low distortion. The high-resolution camera module 200b can further capture… Figure 36A portion of the image. Figure 37 A schematic diagram illustrating images captured by a high-resolution camera module 200b.
[0161] The telephoto camera module 200c and telephoto camera module 200d have high magnification capabilities. The telephoto camera module 200c or telephoto camera module 200d can further capture... Figure 37 A portion of the image. Figure 38 A schematic diagram illustrating the image captured by telephoto camera module 200c or telephoto camera module 200d.
[0162] When the user photographs a subject, the electronic device 200 uses an ultra-wide-angle camera module 200a, a high-resolution camera module 200b, a telephoto camera module 200c, or a telephoto camera module 200d to focus the light for image capture. It activates the flash module 201 for supplemental lighting and uses the subject distance information provided by the focus assist module 202 for rapid focusing. The image signal processor 203 then performs image optimization processing to further improve the image quality produced by the camera module, while also providing zoom functionality. The focus assist module 202 can employ an infrared or laser focus assist system to achieve rapid focusing. The display module 204 can be a touchscreen with touch functionality, allowing manual adjustment of the shooting angle. This enables switching between different camera modules and utilizes the diverse functions of the image software processor for image capture and processing (or can be performed using a physical shooting button). The image processed by the image software processor is then displayed on the display module 204.
[0163] <Fifth Embodiment>
[0164] Please refer to Figure 39 The diagram shows a perspective view of one side of an electronic device according to the fifth embodiment of the present invention.
[0165] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i, a flash module 301, an image signal processor, a display module, an image software processor (not shown), and an electronic image sensor (not shown). Camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i are all located on the same side of the electronic device 300, while the display module is located on the other side of the electronic device 300. Among them, at least one of the camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i may include the imaging lens of this utility model. An electronic photosensitive element is disposed on the imaging surface of these imaging lenses.
[0166] Camera module 300a is a telephoto camera module, camera module 300b is a telephoto camera module, camera module 300c is a telephoto camera module, camera module 300d is a telephoto camera module, camera module 300e is a wide-angle camera module, camera module 300f is a wide-angle camera module, camera module 300g is an ultra-wide-angle camera module, camera module 300h is a Time of Flight (ToF) camera module, and camera module 300i is an ultra-wide-angle camera module. In this embodiment, camera modules 300i, 300a, 300b, 300c, 300d, 300e, 300f, and 300g have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. Furthermore, camera modules 300a and 300b are telephoto camera modules with light-shifting elements. Additionally, camera module 300h can acquire depth information of the image. The electronic device 300 described above is exemplified by including multiple camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i, but the number and configuration of camera modules are not intended to limit this invention. When a user photographs a subject, the electronic device 300 uses camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, or 300i to focus light and capture an image, activates the flash module 301 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be elaborated upon here.
[0167] <Sixth Embodiment>
[0168] Please refer to Figures 40 to 42 ,in Figure 40 A perspective view of an electronic device according to a fifth embodiment of the present invention is shown. Figure 41 Draw Figure 40 A side view of the electronic device, and Figure 42 Draw Figure 40 A top view of the electronic device.
[0169] In this embodiment, the electronic device 400 is a car. The electronic device 400 includes multiple automotive camera modules 400a and electronic photosensitive elements (not shown), and these camera modules 400a each include, for example, the imaging lenses of this invention, which can be applied, for example, to panoramic driving assistance systems, dashcams, and reversing cameras. The electronic photosensitive elements are disposed on the imaging surfaces of these imaging lenses.
[0170] like Figure 40 As shown, the camera module 400a 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.
[0171] like Figure 41 As shown, the camera module 400a can be installed, for example, below the left and right rearview mirrors respectively. The viewing angle of the camera module 400a can be 40 degrees to 90 degrees to capture image information within the range of the left and right lanes.
[0172] like Figure 42 As shown, the camera module 400a can also be installed, for example, 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.
[0173] The imaging lens of this invention is not limited to applications in smartphones, panoramic driving assistance systems, dashcams, and reversing cameras. It can be applied to various mobile focusing systems as needed, and features excellent aberration correction and good image quality. For example, the imaging lens 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, 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.
[0174] 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, Comprising: a plastic lens having a central axis, and the plastic lens comprising: an optically effective portion, wherein the central axis passes through a center of the optically effective portion; and a peripheral portion, which is disposed adjacent to a periphery of the optically effective portion, and the peripheral portion comprising: a first side surface; a second side surface, which is disposed opposite to the first side surface in a direction parallel to the central axis; and a connecting surface, which connects the first side surface and the second side surface, and the connecting surface being farther away from the central axis than the first side surface and the second side surface; wherein at least one of the first side surface and the second side surface has a structure region, the plastic lens further comprising a plurality of columnar protrusions, which are disposed in the structure region and arranged in a two-dimensional array, the columnar protrusions being connected to the structure region and protruding in a direction away from the structure region, each of the columnar protrusions having an opposite bottom and a top, each of the bottoms having a circular arc profile and being connected to the structure region, and each of the tops having a circular arc surface; and wherein a projected area of the structure region on a plane perpendicular to the central axis is A1, and a number of the columnar protrusions is N1, which satisfy the following conditions: 250 mm -2 < N1 / A1 < 1500 mm -2 .
2. The imaging lens according to claim 1, characterized in that, a projected area of the structure region on a plane perpendicular to the central axis is A1, and a number of the columnar protrusions is N1, which satisfy the following conditions: 450 mm -2 < N1 / A1 < 1100 mm -2 .
3. The imaging lens according to claim 2, characterized in that, a projected area of the structure region on a plane perpendicular to the central axis is A1, and a number of the columnar protrusions is N1, which satisfy the following conditions: 500 mm -2 < N1 / A1 < 800 mm -2 .
4. The imaging lens according to claim 1, characterized in that, a number of the columnar protrusions is N1, which satisfy the following conditions: 746<N1<4500。 5. The imaging lens according to claim 4, characterized in that, a number of the columnar protrusions is N1, which satisfy the following conditions: 783<N1<2330。 6. The imaging lens according to claim 5, characterized in that, a number of the columnar protrusions is N1, which satisfy the following conditions: 814<N1<1513。 7. The imaging lens according to claim 1, characterized in that, a number of the columnar protrusions is N1, which satisfy the following conditions: an angle between a surface of the structure region and the central axis is θ, which satisfy the following conditions:
8. The imaging lens according to claim 7, characterized in that, 0.86 < sin θ ≤ 1. an angle between a surface of the structure region and the central axis is θ, which satisfy the following conditions:
9. The imaging lens according to claim 7, characterized in that, 0.96 < sin θ < 1. a protruding height of each of the columnar protrusions in a direction parallel to the central axis is H1, and a distance between any two adjacent columnar protrusions is P1, which satisfy the following conditions:
10. The imaging lens according to claim 9, characterized in that, 0.2 < H1 / P1 < 0.
8. a protruding height of each of the columnar protrusions in a direction parallel to the central axis is H1, and a distance between any two adjacent columnar protrusions is P1, which satisfy the following conditions:
11. The imaging lens according to claim 7, characterized in that, 0.4 < H1 / P1 < 0.
67.
12. The imaging lens according to claim 1, characterized in that, a direction in which each of the columnar protrusions protrudes from the structure region is parallel to the central axis.
13. The imaging lens according to claim 1, characterized in that, further comprising an optical element, wherein the optical element is disposed adjacent to the plastic lens, and the top of the columnar protrusion is in physical contact with the optical element.
14. The imaging lens according to claim 1, characterized in that, the plastic lens further comprises a light-absorbing coating, and the light-absorbing coating covers the structure region and is used to reduce light reflection.
15. The imaging lens according to claim 1, characterized in that, a surface of the columnar protrusion is a smooth surface.
16. An electronic device, comprising: further comprising an adhesive element for fixing the plastic lens, wherein the columnar protrusion is in physical contact with the adhesive element. Comprising: the imaging lens according to claim 1; and An electronic photosensitive element is disposed on an imaging surface of the imaging lens.