Metal light-shielding element, imaging lens module and electronic device

Abstract

A metal light-shielding element, an imaging lens module and an electronic device are disclosed. The metal light-shielding element surrounds a central axis and includes an outer diameter surface, a first annular surface, a second annular surface and an anti-reflection layer. The outer diameter surface surrounds the metal light-shielding element. The first annular surface is disposed opposite to the outer diameter surface and is closer to the central axis than the outer diameter surface. The second annular surface is disposed opposite to the outer diameter surface, is closer to the central axis than the outer diameter surface, and is connected to the first annular surface to form a minimum opening structure. The anti-reflection layer is disposed on the first annular surface and the second annular surface and covers the minimum opening structure, and includes a light-absorbing layer and a nano-structure layer disposed on the light-absorbing layer. Thus, the light-shielding efficiency can be improved.

Description

Technical Field

[0001] This disclosure relates to a metal light-shielding element and an imaging lens module, and more particularly to a metal light-shielding element and an imaging lens module used in a portable electronic device. Background Technology

[0002] In recent years, portable electronic devices have developed rapidly, such as smart electronic devices and tablet computers, which have become ubiquitous in modern life. As a result, imaging lens modules and their metal light-shielding components mounted on these devices have also flourished. However, with the advancement of technology, users are placing increasingly higher demands on the quality of these metal light-shielding components.

[0003] Please refer to Figure 9 This is a schematic diagram of an imaging lens module 90 according to the prior art. Figure 9 It is known that in existing imaging lens modules 90, non-imaging light rays L are often generated due to reflections from the assembly components (such as protective glass 94) surrounding the imaging lens group 91. Therefore, developing a metal light-shielding element that can provide higher light-shielding efficiency has become an important and urgent problem to be solved in the industry. Summary of the Invention

[0004] This disclosure provides a metal light-shielding element, an imaging lens module, and an electronic device, which provides high light-shielding efficiency by setting an anti-reflective layer to prevent non-imaging light from entering the imaging lens module.

[0005] According to one embodiment of this disclosure, a metal light-shielding element is provided, which surrounds a central axis and includes an outer diameter surface, a first annular surface, a second annular surface, and an anti-reflective layer. The outer diameter surface surrounds the metal light-shielding element. The first annular surface is disposed opposite the outer diameter surface and is closer to the central axis than the outer diameter surface. The second annular surface is disposed opposite the outer diameter surface and is closer to the central axis than the outer diameter surface. The first annular surface and the second annular surface are connected to form a minimum opening structure. The anti-reflective layer is disposed on the first annular surface and the second annular surface, covering the minimum opening structure, and includes a light-absorbing layer and a nanostructure layer, wherein the nanostructure layer is disposed on the light-absorbing layer. The nanostructure layer includes a plurality of nanostructure units, and the nanostructure units form a nanoridge-like protrusion structure layer. The minimum opening structure is a pointed opening structure, and the first annular surface and the second annular surface form an angle α, which satisfies the following condition: 0 degrees < α ≤ 170 degrees.

[0006] The metal light-shielding element according to the embodiment described above, wherein the light-absorbing layer is a carbon black material layer.

[0007] According to the aforementioned embodiment of the metal light-shielding element, the nanostructure layer includes a connecting layer, and the connecting layer is disposed between the light-absorbing layer and the nanoridge-shaped protrusion structure layer.

[0008] According to the embodiment described above, the thickness of the connecting layer is d, which satisfies the following condition: 30nm≤d≤500nm.

[0009] According to the embodiment described above, the height of each nanostructure unit is h, which satisfies the following condition: 90nm ≤ h ≤ 350nm. Additionally, it satisfies the following condition: 90nm ≤ h ≤ 290nm.

[0010] According to the embodiment described above, the metal light-shielding element has at least one constriction structure in the tip opening structure, and the constriction structure is closer to the central axis than the maximum outer diameter of the tip opening structure.

[0011] According to the embodiment described above, the included angle α satisfies the following condition: 10 degrees ≤ α ≤ 150 degrees. Additionally, it satisfies the following condition: 20 degrees ≤ α ≤ 120 degrees.

[0012] The metal light-shielding element according to the embodiments described above further includes a groove structure, wherein the groove structure is disposed on at least one of the first annular surface and the second annular surface, the groove structure is recessed toward the outer diameter surface, and at least a portion of the anti-reflective layer is disposed on the groove structure.

[0013] According to one embodiment of the present disclosure, an imaging lens module is provided, which includes an imaging lens group and at least one metal light-shielding element as described in the above embodiments, wherein the metal light-shielding element and the imaging lens group are correspondingly arranged.

[0014] According to one embodiment of the present disclosure, an electronic device is provided, which includes an imaging lens module as described in the foregoing embodiments and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging lens module.

[0015] According to one embodiment of this disclosure, a metal light-shielding element is provided, which surrounds a central axis and includes an outer diameter surface, a first annular surface, a second annular surface, and an anti-reflective layer. The outer diameter surface surrounds the metal light-shielding element. The first annular surface is disposed opposite the outer diameter surface and is closer to the central axis than the outer diameter surface. The second annular surface is disposed opposite the outer diameter surface and is closer to the central axis than the outer diameter surface. The first annular surface and the second annular surface are connected to form a minimum opening structure. The anti-reflective layer is disposed on the first annular surface and the second annular surface, covering the minimum opening structure, and includes a light-absorbing layer and a nanostructure layer, wherein the nanostructure layer is disposed on the light-absorbing layer. The nanostructure layer includes a plurality of nanostructure units, and the nanostructure units form a nanoridge-like protrusion structure layer. The length of the first annular surface along the central axis is L1, and the length of the second annular surface along the central axis is L2, which satisfies the following condition: 0.01mm ≤ L1 + L2 ≤ 3.00mm.

[0016] The metal light-shielding element according to the embodiment described above, wherein the light-absorbing layer is a carbon black material layer.

[0017] According to the aforementioned embodiment of the metal light-shielding element, the nanostructure layer includes a connecting layer, and the connecting layer is disposed between the light-absorbing layer and the nanoridge-shaped protrusion structure layer.

[0018] According to the embodiment described above, the thickness of the connecting layer is d, which satisfies the following condition: 30nm≤d≤500nm.

[0019] According to the embodiment described above, the height of each nanostructure unit is h, which satisfies the following condition: 90nm ≤ h ≤ 350nm. Additionally, it satisfies the following condition: 90nm ≤ h ≤ 290nm.

[0020] According to the embodiment described above, the length of the first annular surface along the central axis is L1, and the length of the second annular surface along the central axis is L2, which satisfies the following condition: 0.03≤L1 / L2≤5.

[0021] The metal light-shielding element according to the embodiments described above further includes a groove structure, wherein the groove structure is disposed on at least one of the first annular surface and the second annular surface, the groove structure is recessed toward the outer diameter surface, and at least a portion of the anti-reflective layer is disposed on the groove structure.

[0022] According to the embodiment described above, the minimum opening structure has at least one constriction structure, and the constriction structure is closer to the central axis than the maximum outer diameter of the minimum opening structure.

[0023] According to one embodiment of this disclosure, a metal light-shielding element is provided, which surrounds a central axis and includes an outer diameter surface, a first annular surface, a second annular surface, and an anti-reflection layer. The outer diameter surface surrounds the metal light-shielding element. The first annular surface is disposed opposite the outer diameter surface and is closer to the central axis than the outer diameter surface. The second annular surface is disposed opposite the outer diameter surface and is closer to the central axis than the outer diameter surface, and the first annular surface and the second annular surface are connected. The anti-reflection layer is disposed on at least one of the first annular surface and the second annular surface, and includes a light-absorbing layer and a nanostructure layer, wherein the nanostructure layer is disposed on the light-absorbing layer. The nanostructure layer includes a plurality of nanostructure units, which form a nanoridge-like protrusion structure layer, and the height of each nanostructure unit is h, which satisfies the following condition: 90nm ≤ h ≤ 350nm.

[0024] According to the embodiment described above, the height of each nanostructure unit is h, which satisfies the following condition: 90nm≤h≤290nm.

[0025] The metal light-shielding element according to the embodiment described above, wherein the light-absorbing layer is a carbon black material layer. Attached Figure Description

[0026] Figure 1A A perspective view of the imaging lens module according to the first embodiment of this disclosure is shown;

[0027] Figure 1B Drawing according to Figure 1A A schematic diagram illustrating the application scenario of the imaging lens module in the first embodiment;

[0028] Figure 1C Drawing according to Figure 1A A schematic diagram of the imaging lens module in the first embodiment;

[0029] Figure 1D Drawing according to Figure 1A Exploded view of the imaging lens module in the first embodiment;

[0030] Figure 1E Drawing according to Figure 1D Scanning electron microscope image of the anti-reflection layer in the first embodiment;

[0031] Figure 1F Drawing according to Figure 1D Scanning electron microscope image of the nano-ridge-like protrusion structure layer in the first embodiment;

[0032] Figure 1G Drawing according to Figure 1A A schematic diagram of the metal light-shielding element in the first embodiment;

[0033] Figure 2A A schematic diagram of the imaging lens module according to the second embodiment of this disclosure is shown;

[0034] Figure 2B Drawing according to Figure 2A Enlarged view of the metal light-shielding element in the second embodiment;

[0035] Figure 2C Drawing according to Figure 2A A partial cross-sectional view of the metal light-shielding element in the second embodiment;

[0036] Figure 2D Drawing according to Figure 2A A schematic diagram of the metal light-shielding element in the second embodiment;

[0037] Figure 2E Drawing according to Figure 2A Enlarged view of the metal light-shielding element in the second embodiment;

[0038] Figure 2F Drawing according to Figure 2AEnlarged view of the metal light-shielding element in the second embodiment;

[0039] Figure 3 An enlarged view of the metal light-shielding element in accordance with the third embodiment of this disclosure is shown;

[0040] Figure 4A A schematic diagram of the imaging lens module according to the fourth embodiment of this disclosure is shown;

[0041] Figure 4B Drawing according to Figure 4A Enlarged view of the metal light-shielding element in the fourth embodiment;

[0042] Figure 5 A schematic diagram of the imaging lens module according to the fifth embodiment of this disclosure is shown;

[0043] Figure 6A A schematic diagram of an electronic device according to the sixth embodiment of this disclosure is shown;

[0044] Figure 6B Drawing according to Figure 6A Another schematic diagram of the electronic device in the sixth embodiment;

[0045] Figure 6C Drawing according to Figure 6A A schematic diagram of an image captured by an electronic device in the sixth embodiment;

[0046] Figure 6D Drawing according to Figure 6A Another image captured by the electronic device in the sixth embodiment is illustrated.

[0047] Figure 6E Drawing according to Figure 6A Another image diagram captured by the electronic device in the sixth embodiment;

[0048] Figure 7 A schematic diagram of an electronic device according to the seventh embodiment of this disclosure is shown;

[0049] Figure 8A A schematic diagram of the vehicle tool according to the eighth embodiment of this disclosure is shown;

[0050] Figure 8B Drawing according to Figure 8A Another schematic diagram of the vehicle tools in the eighth embodiment;

[0051] Figure 8C Drawing according to Figure 8A Another schematic diagram of the vehicle tool in the eighth embodiment; and

[0052] Figure 9 A schematic diagram of an imaging lens module according to the prior art is shown.

[0053] [Symbol Explanation]

[0054] 10, 20, 40, 50, 81, 90: Imaging lens module

[0055] 11,21,41,51,91: Imaging lens group

[0056] 12,22a,22b,22c,300,42,52: Metallic light-shielding elements

[0057] 13,23,43,53: Lens tube

[0058] 14.94: Protective Glass

[0059] 110, 210a, 210b, 210c, 310, 410, 510: Outer diameter surfaces

[0060] 120, 220a, 220b, 220c, 320, 420, 520: First torus

[0061] 130, 230a, 230b, 230c, 330, 430, 530: Second torus

[0062] 131,231a,231b,231c,331,431,531: ​​Minimum aperture

[0063] 140, 240a, 240b, 240c, 340, 440, 540: Anti-reflective layer

[0064] 141,241a,241b,241c,341,441,541: Light absorption layer

[0065] 142, 242a, 242b, 242c, 342, 442, 542: Nanostructure layers

[0066] 143, 143a, 143b, 143c, 243a, 243b, 243c, 343, 443, 543: Nanostructure units

[0067] 144, 244b, 244c, 344, 444, 544: Connector layers

[0068] 145: Nanoridge-like protrusion structure layer

[0069] 232a: Shrinkage structure

[0070] 250a, 350: Groove structure

[0071] 60, 70: Electronic devices

[0072] 61: User Interface

[0073] 62, 711, 712: Ultra-wide-angle camera module

[0074] 63: High-resolution camera module

[0075] 64,715,716,717,718: Telephoto camera modules

[0076] 65: Imaging signal processing element

[0077] 66,720: Flash module

[0078] 713, 714: Wide-angle camera module

[0079] 719: TOF Module

[0080] 80: Vehicles and Tools

[0081] O: Central axis

[0082] L: Non-imaging rays; I1, I2, I3, I4: External space information

[0083] h: Height of each nanostructure unit

[0084] L1: Length of the first torus along the central axis

[0085] L2: Length of the second torus along the central axis

[0086] α: included angle

[0087] d: Thickness of the bonding layer

[0088] θ: perspective Detailed Implementation

[0089] This disclosure provides a metal light-shielding element surrounding a central axis, comprising an outer diameter surface, a first annular surface, a second annular surface, and an anti-reflective layer. The outer diameter surface surrounds the metal light-shielding element. The first annular surface is disposed opposite the outer diameter surface and is closer to the central axis than the outer diameter surface. The second annular surface is disposed opposite the outer diameter surface and is closer to the central axis than the outer diameter surface, and the first annular surface and the second annular surface are connected. The anti-reflective layer is disposed on at least one of the first annular surface and the second annular surface, and comprises a light-absorbing layer and a nanostructure layer, wherein the nanostructure layer is disposed on the light-absorbing layer. Specifically, the nanostructure layer can guide incident light hitting the surface of the metal light-shielding element to the underlying light-absorbing layer, where the light is absorbed, giving the surface of the metal light-shielding element low reflectivity and providing high light-shielding efficiency.

[0090] The metal light-shielding element can be made of free-cutting brass or copper alloy, and can be an auxiliary light-shielding component, spacer ring, lens barrel or light-shielding plate. The auxiliary light-shielding component can be an additional component set outside the imaging lens module to cooperate with the configuration of the imaging lens module to shield the parts of the imaging lens module that are prone to stray light, but is not limited thereto.

[0091] The connection between the first and second annular surfaces forms a minimum aperture structure, which is covered by an anti-reflective layer. This minimum aperture structure can be a pointed aperture structure. Specifically, the connection between the first and second annular surfaces forms a minimum aperture structure, in which the anti-reflective layer covers the minimum aperture structure, and the minimum aperture structure surrounds a central axis to form the minimum aperture. This allows for optical applications. Specifically, the metal light-shielding element can be coated with a light-absorbing layer and a nanostructure layer on the surface of the minimum aperture structure and its surrounding area using a special process, giving the minimum aperture structure low-reflection characteristics.

[0092] The first and second toroidal surfaces form an angle α, which satisfies the following condition: 0 degrees < α ≤ 170 degrees. Additionally, it satisfies the following condition: 10 degrees ≤ α ≤ 150 degrees. When α meets the above numerical range, metal processing and manufacturing become more efficient. Furthermore, it satisfies the following condition: 20 degrees ≤ α ≤ 120 degrees. When α meets the above numerical range, it is suitable for use in optical apertures to provide higher optical quality.

[0093] The length of the first toroidal surface along the central axis is L1, and the length of the second toroidal surface along the central axis is L2, which can satisfy the following condition: 0.01mm ≤ L1 + L2 ≤ 3.00mm. By having the first and second toroidal surfaces within a specific length range along the central axis, the minimum opening structure can achieve anti-reflective effects. Furthermore, the lengths of the first and second toroidal surfaces along the central axis can be zero due to the angles of metal machining, i.e., L1 and L2 can be zero.

[0094] The nanostructure layer can contain multiple nanostructure units, forming a nanoridge-like protrusion structure layer. The height of each nanostructure unit is h, which satisfies the following condition: 90nm ≤ h ≤ 350nm. By setting nanostructure units with an optically compatible height range, light can more easily enter the light-absorbing layer. This provides a method for depositing nanostructure units into internal pores, achieving rapid and easily mass-producible feasibility. Furthermore, when viewed in cross-section, the nanoridge-like protrusion structure layer exhibits a shape wider at the bottom and narrower at the top, like a mountain ridge, thereby causing the equivalent refractive index to gradually decrease from the bottom to the top of the nanostructure layer, reducing reflected light. Specifically, the nanoridge-like protrusion structure layer can be made of alumina, but is not limited to this. Additionally, it can satisfy the following condition: 90nm ≤ h ≤ 290nm. When h meets the above numerical range, a more stable nanoridge-like protrusion structure layer can be obtained, which is less prone to peeling or breakage.

[0095] The light-absorbing layer can be a carbon black material layer. This can improve the light absorption rate and provide uniformity to the mold layer.

[0096] The nanostructure layer may include a connecting layer disposed between the light-absorbing layer and the nanoridge-like protrusion structure layer. Furthermore, there is no gap between the top of the connecting layer and the bottom of the nanoridge-like protrusion structure layer; that is, the connecting layer and the nanoridge-like protrusion structure layer are tightly bonded. This allows the nanostructure layer to possess strong structural stability. Specifically, the connecting layer may be made of silica, but is not limited to this material.

[0097] The minimum aperture structure may have at least one constricted aperture structure, with the constricted aperture structure being closer to the central axis than the maximum outer diameter of the minimum aperture structure. Furthermore, the pointed aperture structure may have a constricted aperture structure, wherein the constricted aperture structure is closer to the central axis than the maximum outer diameter of the pointed aperture structure. Through the light-shielding design of the constricted aperture structure, the probability of stray light generation by the pointed aperture structure can be reduced.

[0098] The metal light-shielding element may further include a groove structure, wherein the groove structure is disposed on at least one of the first annular surface and the second annular surface, the groove structure is recessed towards the outer diameter surface, and at least a portion of the anti-reflective layer is disposed on the groove structure. This forms a light trap structure to reduce the probability of stray light generation.

[0099] The thickness of the bonding layer is d, which can satisfy the following condition: 30nm≤d≤500nm. By setting the bonding layer within a specific thickness range, the deposition yield of the nanoridge protrusion structure layer can be improved, and the light absorption layer can be protected from scratches.

[0100] The length of the first annular surface along the central axis is L1, and the length of the second annular surface along the central axis is L2. These two lengths must satisfy the following condition: 0.03 ≤ L1 / L2 ≤ 5. When L1 / L2 meets the above numerical range, the proportion of the minimum opening structure of the metal light-shielding element that directly irradiates a strong light source can be reduced, while maintaining manufacturing feasibility.

[0101] The various technical features of the metal light-shielding element disclosed above can be combined and configured to achieve the corresponding effects.

[0102] This disclosure provides an imaging lens module, which includes an imaging lens group and at least one of the aforementioned metal light-shielding elements. The metal light-shielding element is disposed corresponding to the imaging lens group. Specifically, the metal light-shielding element may be disposed on the object side of the imaging lens group, on the image side of the imaging lens group, or between any two imaging lenses in the imaging lens group.

[0103] This disclosure provides an electronic device comprising the aforementioned imaging lens module and an electronic photosensitive element. The electronic photosensitive element is disposed on an imaging surface of the imaging lens module.

[0104] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0105] <First Embodiment>

[0106] Please refer to Figures 1A to 1D ,in Figure 1A A perspective view of the imaging lens module 10 according to the first embodiment of this disclosure is shown. Figure 1B Drawing according to Figure 1A A schematic diagram illustrating the application scenario of the imaging lens module 10 in the first embodiment. Figure 1C Drawing according to Figure 1A A schematic diagram of the imaging lens module 10 in the first embodiment. Figure 1D Drawing according to Figure 1A An exploded view of the imaging lens module 10 in the first embodiment. Figures 1A to 1D It is known that the imaging lens module 10 includes an imaging lens group 11, a metal light-shielding element 12, a lens barrel 13 and a protective glass 14. The metal light-shielding element 12 is correspondingly arranged with the imaging lens group 11 and is disposed on the object side of the imaging lens group 11. The lens barrel 13 is used to accommodate the imaging lens group 11, and the protective glass 14 is disposed on the object side of the metal light-shielding element 12.

[0107] Furthermore, the metal light-shielding element 12 is disposed on the outer surface of the lens barrel 13 to facilitate assembly and quickly achieve the effect of light shielding. Specifically, the metal light-shielding element 12 is an auxiliary light-shielding component, which can be an additional component disposed outside the imaging lens module 10 to cooperate with the configuration of the imaging lens module 10 to shield the parts of the imaging lens module 10 that are prone to stray light, but is not limited thereto.

[0108] Please refer to Figures 1E to 1G ,in Figure 1E Drawing according to Figure 1D Scanning electron microscope image of the anti-reflection layer 140 in the first embodiment. Figure 1F Drawing according to Figure 1D Scanning electron microscope image of the nanoridge-like protrusion structure layer 145 in the first embodiment. Figure 1G Drawing according to Figure 1A A schematic diagram of the metal light-shielding element 12 in the first embodiment. (From...) Figures 1B to 1G It is known that the metal light-shielding element 12 surrounds a central axis O and includes an outer diameter surface 110, a first annular surface 120, a second annular surface 130, and an anti-reflective layer 140. The outer diameter surface 110 surrounds the metal light-shielding element 12. Specifically, the first annular surface 120 is disposed relative to the outer diameter surface 110, and the first annular surface 120 is closer to the central axis O than the outer diameter surface 110; the second annular surface 130 is disposed relative to the outer diameter surface 110, and the second annular surface 130 is closer to the central axis O than the outer diameter surface 110, and the first annular surface 120 and the second annular surface 130 are connected to form a minimum opening structure (not shown in the figure), wherein the minimum opening structure is a pointed opening structure to provide optical applications; an anti-reflective layer 140 is disposed on the first annular surface 120 and the second annular surface 130, and covers the minimum opening structure, and includes a light-absorbing layer 141 and a nanostructure layer 142, wherein the nanostructure layer 142 is disposed on the light-absorbing layer 141. Specifically, the connection between the first annular surface 120 and the second annular surface 130 is the minimum opening structure, wherein the anti-reflective layer 140 covers the minimum opening structure, and the minimum opening structure surrounds the central axis O to form the minimum opening 131. It must be noted that... Figure 1G Two magnified views at different magnifications are shown to clearly observe the structural details of the metal light-shielding element 12, and Figure 1B , Figure 1C and Figure 1G The dashed line in the middle indicates the area within which the anti-reflective layer 140 is installed.

[0109] Depend on Figure 1BIt is understood that the metal light-shielding element 12 is specially processed to prevent the generation of non-imaging light rays L around the outer periphery of the imaging lens group 11. Specifically, the metal light-shielding element 12 is coated with a light-absorbing layer 141 and a nanostructure layer 142 on its minimum opening structure and the surface surrounding the minimum opening structure through a special process to prevent the generation of additional non-imaging light rays L. The nanostructure layer 142 can guide the incident light hitting the surface of the metal light-shielding element 12 to the underlying light-absorbing layer 141, where the light is absorbed, giving both the surface of the metal light-shielding element 12 and the minimum opening structure low reflectivity, providing high light-shielding efficiency. Furthermore, the light-absorbing layer 141 is a carbon black material layer to improve the light absorption rate and provide uniformity of the layer, while the material of the metal light-shielding element 12 can be free-machining brass or copper alloy, but is not limited to these.

[0110] Depend on Figures 1E to 1G As can be seen, the nanostructure layer 142 comprises multiple nanostructure units 143, 143a, 143b, 143c and a connecting layer 144, wherein the nanostructure units 143, 143a, 143b, 143c form a nanoridge-like protrusion structure layer 145, and the connecting layer 144 is disposed between the light-absorbing layer 141 and the nanoridge-like protrusion structure layer 145. This provides a method for depositing nanostructure units 143, 143a, 143b, 143c into internal pores, achieving rapid and easily mass-producible feasibility. Furthermore, there is no gap between the top of the connecting layer 144 and the bottom of the nanoridge-like protrusion structure layer 145, meaning the connecting layer 144 and the nanoridge-like protrusion structure layer 145 are tightly bonded, thereby obtaining a nanostructure layer 142 with strong structural stability. In detail, the nano-ridge protrusion structure layer 145 may be made of alumina and the connecting layer 144 may be made of silicon dioxide, but are not limited thereto.

[0111] Depend on Figure 1E As can be seen, when viewed in cross-section, the nanoridge-like protrusion structure layer 145 exhibits a shape that is wider at the bottom and narrower at the top, resembling a mountain ridge. This allows the equivalent refractive index to gradually decrease from the bottom to the top of the nanostructure layer 142, thereby reducing the generation of reflected light. Furthermore, the height of each nanostructure unit 143a, 143b, and 143c is h, where the height h of nanostructure unit 143a is 143.6 nm, the height h of nanostructure unit 143b is 143.1 nm, and the height h of nanostructure unit 143c is 131.5 nm.

[0112] Depend on Figure 1G It can be seen that the first annular surface 120 and the second annular surface 130 form an angle α; the thickness of the connecting layer 144 is d; the height of each nanostructure unit 143 is h; the length of the first annular surface 120 along the central axis O is L1, and the length of the second annular surface 130 along the central axis O is L2. The parameters satisfy the conditions in Table 1A below.

[0113]

[0114] <Second Embodiment>

[0115] Please refer to Figure 2A This is a schematic diagram of the imaging lens module 20 according to the second embodiment of this disclosure. Figure 2A As can be seen, the imaging lens module 20 includes an imaging lens group 21, multiple metal light-blocking elements 22a, 22b, and 22c, and a lens barrel 23. The metal light-blocking elements 22a, 22b, and 22c are correspondingly arranged with the imaging lens group 21, and are respectively positioned between any two imaging lenses (not shown in the figure) of the imaging lens group 21. The lens barrel 23 is used to house the imaging lens group 21. Furthermore, the metal light-blocking elements 22a, 22b, and 22c are disposed within the lens barrel 23 to achieve light-blocking effects as needed. Specifically, the metal light-blocking elements 22a and 22c are spacer rings, and the metal light-blocking element 22b is a light-blocking plate.

[0116] Please refer to Figures 2B to 2D ,in Figure 2B Drawing according to Figure 2A An enlarged view of the metal light-shielding element 22a in the second embodiment. Figure 2C Drawing according to Figure 2A A partial cross-sectional view of the metal light-shielding element 22a in the second embodiment. Figure 2D Drawing according to Figure 2A A schematic diagram of the metal light-shielding element 22a in the second embodiment. (From...) Figures 2B to 2D It is known that the metal light-shielding element 22a surrounds a central axis O and includes an outer diameter surface 210a, a first annular surface 220a, a second annular surface 230a, and an anti-reflective layer 240a. The outer diameter surface 210a surrounds the metal light-shielding element 22a. Specifically, the first annular surface 220a is disposed relative to the outer diameter surface 210a, and the first annular surface 220a is closer to the central axis O than the outer diameter surface 210a; the second annular surface 230a is disposed relative to the outer diameter surface 210a, and the second annular surface 230a is closer to the central axis O than the outer diameter surface 210a; the first annular surface 220a and the second annular surface 230a are connected to form a minimum opening structure (not shown in the figure), wherein the minimum opening structure is a pointed opening structure, thereby providing optical applications; the anti-reflective layer 240a is disposed on the first annular surface 220a and the second annular surface 230a, and covers the minimum opening structure, and includes a light absorption layer 241a and a nanostructure layer 242a, wherein the nanostructure layer 242a is disposed on the light absorption layer 241a. Specifically, the connection between the first annular surface 220a and the second annular surface 230a is a minimum opening structure, wherein the anti-reflective layer 240a covers the minimum opening structure, and the minimum opening structure surrounds the central axis O to form a minimum opening 231a. It must be noted that... Figure 2B Two magnified diagrams at different magnifications are shown to clearly observe the structural details of the metal light-shielding element 22a.

[0117] The nanostructure layer 242a comprises multiple nanostructure units 243a, wherein the nanostructure units 243a form a nanoridge-like protrusion structure layer (not shown in the figure), and the nanoridge-like protrusion structure layer is directly deposited on the light-absorbing layer 241a. A connecting layer can be optionally provided depending on the material conditions. This provides a method for depositing nanostructure units 243a into internal pores, achieving rapid and easily mass-producible feasibility. Specifically, the nanoridge-like protrusion structure layer can be made of alumina, but is not limited to this material.

[0118] Depend on Figure 2B and Figure 2C It is understood that the metal light-shielding element 22a also includes a groove structure 250a, wherein the groove structure 250a is disposed on the second annular surface 230a, the groove structure 250a is recessed towards the outer diameter surface 210a, and at least a portion of the anti-reflection layer 240a is disposed on the groove structure 250a. This forms a light trap structure to reduce the probability of stray light generation.

[0119] Depend on Figure 2D It is known that the pointed aperture structure has at least one constriction structure 232a, wherein the constriction structure 232a is closer to the central axis O than the maximum outer diameter of the pointed aperture structure. Through the light-shielding design of the constriction structure 232a, the probability of stray light generated by the pointed aperture structure can be reduced. Furthermore, the anti-reflective layer 240a, combined with the constriction structure 232a, can more effectively block non-imaging light, thus effectively reducing the probability of image ghosting.

[0120] Depend on Figure 2B It can be seen that the first toroidal surface 220a and the second toroidal surface 230a form an angle α; the height of each nanostructure unit 243a is h; the length of the first toroidal surface 220a along the central axis O is L1, and the length of the second toroidal surface 230a along the central axis O is L2. The parameters satisfy the conditions in Table 2A below.

[0121]

[0122] Please refer to Figure 2E According to Figure 2A An enlarged view of the metal light-shielding element 22b in the second embodiment. (From...) Figure 2EIt is known that the metal light-shielding element 22b surrounds a central axis O and includes an outer diameter surface 210b, a first annular surface 220b, a second annular surface 230b, and an anti-reflective layer 240b. The outer diameter surface 210b surrounds the metal light-shielding element 22b. Specifically, the first annular surface 220b is disposed relative to the outer diameter surface 210b, and the first annular surface 220b is closer to the central axis O than the outer diameter surface 210b; the second annular surface 230b is disposed relative to the outer diameter surface 210b, and the second annular surface 230b is closer to the central axis O than the outer diameter surface 210b; the first annular surface 220b and the second annular surface 230b are connected to form a minimum opening structure (not shown in the figure), wherein the minimum opening structure is a pointed opening structure, thereby providing optical applications; the anti-reflective layer 240b is disposed on the first annular surface 220b and the second annular surface 230b, and covers the minimum opening structure, and includes a light-absorbing layer 241b and a nanostructure layer 242b, wherein the nanostructure layer 242b is disposed on the light-absorbing layer 241b. Specifically, the connection between the first annular surface 220b and the second annular surface 230b is a minimum opening structure, wherein the anti-reflective layer 240b covers the minimum opening structure, and the minimum opening structure surrounds the central axis O to form a minimum opening 231b. It must be noted that... Figure 2E Two magnified diagrams at different magnifications are shown to clearly observe the structural details of the metal light-shielding element 22b.

[0123] The nanostructure layer 242b comprises multiple nanostructure units 243b and a connecting layer 244b. The nanostructure units 243b form a nanoridge-like protrusion structure layer (not shown in the figure), and the connecting layer 244b is disposed between the light-absorbing layer 241b and the nanoridge-like protrusion structure layer. This provides a method for depositing nanostructure units 243b into internal pores, achieving rapid and easily mass-producible feasibility. Furthermore, there is no gap between the top of the connecting layer 244b and the bottom of the nanoridge-like protrusion structure layer, meaning the connecting layer 244b and the nanoridge-like protrusion structure layer are tightly bonded, thereby obtaining a nanostructure layer 242b with strong structural stability. Specifically, the nanoridge-like protrusion structure layer can be made of alumina, and the connecting layer 244b can be made of silicon dioxide, but these are not limited to these materials.

[0124] The first toroidal surface 220b and the second toroidal surface 230b form an angle α; the thickness of the connecting layer 244b is d; the height of each nanostructure unit 243b is h; the length of the first toroidal surface 220b along the central axis O is L1, and the length of the second toroidal surface 230b along the central axis O is L2. The parameters satisfy the conditions in Table 2B below.

[0125]

[0126] Please refer to Figure 2F According to Figure 2AAn enlarged view of the metal light-shielding element 22c in the second embodiment. Figure 2F It is known that the metal light-shielding element 22c surrounds a central axis O and includes an outer diameter surface 210c, a first annular surface 220c, a second annular surface 230c, and an anti-reflective layer 240c. The outer diameter surface 210c surrounds the metal light-shielding element 22c. Specifically, the first annular surface 220c is disposed relative to the outer diameter surface 210c, and the first annular surface 220c is closer to the central axis O than the outer diameter surface 210c; the second annular surface 230c is disposed relative to the outer diameter surface 210c, and the second annular surface 230c is closer to the central axis O than the outer diameter surface 210c; the first annular surface 220c and the second annular surface 230c are connected to form a minimum opening structure (not shown in the figure), wherein the minimum opening structure is a pointed opening structure, thereby providing optical applications; the anti-reflective layer 240c is disposed on the first annular surface 220c and the second annular surface 230c, and covers the minimum opening structure, and includes a light absorption layer 241c and a nanostructure layer 242c, wherein the nanostructure layer 242c is disposed on the light absorption layer 241c. Specifically, the connection between the first annular surface 220c and the second annular surface 230c is a minimum opening structure, wherein the anti-reflective layer 240c covers the minimum opening structure, and the minimum opening structure surrounds the central axis O to form a minimum opening 231c. It must be noted that... Figure 2F Two magnified diagrams at different magnifications are shown to clearly observe the structural details of the metal light-shielding element 22c.

[0127] The nanostructure layer 242c comprises multiple nanostructure units 243c and a connecting layer 244c. The nanostructure units 243c form a nanoridge-like protrusion structure layer (not shown in the figure), and the connecting layer 244c is disposed between the light-absorbing layer 241c and the nanoridge-like protrusion structure layer. This provides a method for depositing nanostructure units 243c into internal pores, achieving rapid and easily mass-producible feasibility. Furthermore, there is no gap between the top of the connecting layer 244c and the bottom of the nanoridge-like protrusion structure layer, meaning the connecting layer 244c and the nanoridge-like protrusion structure layer are tightly bonded, thereby obtaining a nanostructure layer 242c with strong structural stability. Specifically, the nanoridge-like protrusion structure layer can be made of alumina, and the connecting layer 244c can be made of silicon dioxide, but these are not limited to these materials.

[0128] The first toroidal surface 220c and the second toroidal surface 230c form an angle α; the thickness of the connecting layer 244c is d; the height of each nanostructure unit 243c is h; the length of the first toroidal surface 220c along the central axis O is L1, and the length of the second toroidal surface 230c along the central axis O is L2. The parameters satisfy the conditions in Table 2C below.

[0129]

[0130] It must be noted that each metal light-shielding element 22a, 22b, and 22c is coated with light-absorbing layers 241a, 241b, and 241c and nanostructure layers 242a, 242b, and 242c on its minimum opening structure and the surface surrounding the minimum opening structure through a special process to prevent the generation of additional non-imaging light. The nanostructure layers 242a, 242b, and 242c can guide the incident light hitting the surface of the metal light-shielding elements 22a, 22b, and 22c to the underlying light-absorbing layers 241a, 241b, and 241c, where the light is absorbed. This gives the surface of the metal light-shielding elements 22a, 22b, and 22c and the minimum opening structure low-reflection characteristics, providing high light-shielding efficiency. Furthermore, the light-absorbing layers 241a, 241b, and 241c are made of carbon black material to improve light absorption and provide uniformity of the mold layer, while the metal light-shielding elements 22a, 22b, and 22c can be made of free-machining brass or copper alloy, but are not limited to these materials. In further detail, Figure 2A , Figure 2B , Figure 2E and Figure 2F The dashed line in the middle refers to the installation range of anti-reflective layers 240a, 240b, and 240c.

[0131] <Third Embodiment>

[0132] Please refer to Figure 3 This is an enlarged view of the metal light-shielding element 300 according to the third embodiment of this disclosure. Figure 3 It is known that the metal light-shielding element 300 surrounds a central axis O and includes an outer diameter surface 310, a first annular surface 320, a second annular surface 330, and an anti-reflective layer 340. The outer diameter surface 310 surrounds the metal light-shielding element 300. Specifically, the first annular surface 320 is disposed relative to the outer diameter surface 310, and the first annular surface 320 is closer to the central axis O than the outer diameter surface 310; the second annular surface 330 is disposed relative to the outer diameter surface 310, and the second annular surface 330 is closer to the central axis O than the outer diameter surface 310, and the first annular surface 320 and the second annular surface 330 are connected to form a minimum opening structure (not shown in the figure), wherein the minimum opening structure is a pointed opening structure to provide optical applications; an anti-reflective layer 340 is disposed on the first annular surface 320 and the second annular surface 330, and covers the minimum opening structure, and includes a light-absorbing layer 341 and a nanostructure layer 342, wherein the nanostructure layer 342 is disposed on the light-absorbing layer 341. Specifically, the connection between the first annular surface 320 and the second annular surface 330 is the minimum opening structure, wherein the anti-reflective layer 340 covers the minimum opening structure, and the minimum opening structure surrounds the central axis O to form the minimum opening 331. It must be noted that... Figure 3 Two magnified views at different magnifications are shown to clearly observe the structural details of the metal light-shielding element 300, and Figure 3The dashed line in the middle indicates the area within which the anti-reflective layer 340 is installed.

[0133] The metal light-shielding element 300 undergoes a special process to prevent non-imaging light from being generated around the outer periphery of the imaging lens assembly (not shown). Specifically, the metal light-shielding element 300 is coated with a light-absorbing layer 341 and a nanostructure layer 342 on its minimum opening structure and the surface surrounding the minimum opening structure using a special process to prevent the generation of additional non-imaging light. The nanostructure layer 342 guides incident light hitting the surface of the metal light-shielding element 300 to the underlying light-absorbing layer 341, where the light is absorbed. This gives both the surface of the metal light-shielding element 300 and its minimum opening structure low reflectivity, providing high light-shielding efficiency. Furthermore, the light-absorbing layer 341 is a carbon black material layer to improve light absorption and provide uniformity of the layer. The metal light-shielding element 300 can be made of free-machining brass or a copper alloy, but is not limited to these materials.

[0134] The nanostructure layer 342 comprises multiple nanostructure units 343 and a connecting layer 344. The nanostructure units 343 form a nanoridge-like protrusion structure layer (not shown in the figure), and the connecting layer 344 is disposed between the light-absorbing layer 341 and the nanoridge-like protrusion structure layer. This provides a method for depositing nanostructure units 343 into internal pores, achieving rapid and easily mass-producible feasibility. Furthermore, there is no gap between the top of the connecting layer 344 and the bottom of the nanoridge-like protrusion structure layer, meaning the connecting layer 344 and the nanoridge-like protrusion structure layer are tightly bonded, thereby obtaining a nanostructure layer 342 with strong structural stability. Specifically, the nanoridge-like protrusion structure layer can be made of alumina, and the connecting layer 344 can be made of silicon dioxide, but these are not limited to these materials.

[0135] The metal light-shielding element 300 also includes a groove structure 350, wherein the groove structure 350 is disposed on the second annular surface 330, the groove structure 350 is recessed toward the outer diameter surface 310, and at least a portion of the anti-reflective layer 340 is disposed on the groove structure 350. This forms a light trap structure to reduce the probability of stray light generation.

[0136] The first toroidal surface 320 and the second toroidal surface 330 form an angle α; the thickness of the connecting layer 344 is d; the height of each nanostructure unit 343 is h; the length of the first toroidal surface 320 along the central axis O is L1, and the length of the second toroidal surface 330 along the central axis O is L2. The parameters satisfy the conditions in Table 3A below.

[0137]

[0138] <Fourth Embodiment>

[0139] Please refer to Figure 4AThis is a schematic diagram of the imaging lens module 40 according to the fourth embodiment of this disclosure. Figure 4A As can be seen, the imaging lens module 40 includes an imaging lens group 41, a metal light-shielding element 42, and a lens barrel 43. The metal light-shielding element 42 is correspondingly disposed with the imaging lens group 41 and is located on the object side of the imaging lens group 41. The lens barrel 43 is used to house the imaging lens group 41. Furthermore, the metal light-shielding element 42 is disposed on the outer surface of the lens barrel 43 to facilitate assembly and quickly achieve the light-shielding effect. Specifically, the metal light-shielding element 42 is an auxiliary light-shielding component. The auxiliary light-shielding component can be an additional component disposed outside the imaging lens module 40 to cooperate with the configuration of the imaging lens module 40 to shield the parts of the imaging lens module 40 that are prone to stray light, but it is not limited to this.

[0140] Please refer to Figure 4B According to Figure 4A Enlarged view of the metal light-shielding element 42 in the fourth embodiment. Figure 4B It is known that the metal light-shielding element 42 surrounds a central axis O and includes an outer diameter surface 410, a first annular surface 420, a second annular surface 430, and an anti-reflective layer 440. The outer diameter surface 410 surrounds the metal light-shielding element 42. Specifically, the first annular surface 420 is disposed opposite the outer diameter surface 410, and the first annular surface 420 is closer to the central axis O than the outer diameter surface 410; the second annular surface 430 is disposed opposite the outer diameter surface 410, and the second annular surface 430 is closer to the central axis O than the outer diameter surface 410, and the first annular surface 420 and the second annular surface 430 are connected to form a minimum opening structure (not shown in the figure), wherein the minimum opening structure is a pointed opening structure to provide optical applications; an anti-reflective layer 440 is disposed on the first annular surface 420 and the second annular surface 430, and covers the minimum opening structure, and includes a light-absorbing layer 441 and a nanostructure layer 442, wherein the nanostructure layer 442 is disposed on the light-absorbing layer 441. Specifically, the connection between the first annular surface 420 and the second annular surface 430 is the minimum opening structure, wherein the anti-reflective layer 440 covers the minimum opening structure, and the minimum opening structure surrounds the central axis O to form the minimum opening 431. It must be noted that... Figure 4B Two magnified views at different magnifications are shown to clearly observe the structural details of the metal light-shielding element 42, and Figure 4A and Figure 4B The dashed line in the middle indicates the area where the anti-reflective layer 440 is installed.

[0141] The metal light-shielding element 42 is specially processed to prevent non-imaging light from being generated around the imaging lens assembly 41. Specifically, the metal light-shielding element 42 is coated with a light-absorbing layer 441 and a nanostructure layer 442 on its minimum opening structure and the surface surrounding the minimum opening structure through a special process to prevent the generation of additional non-imaging light. The nanostructure layer 442 can guide the incident light hitting the surface of the metal light-shielding element 42 to the underlying light-absorbing layer 441, where the light is absorbed. This gives both the surface of the metal light-shielding element 42 and its minimum opening structure low reflectivity, providing high light-shielding efficiency. Furthermore, the light-absorbing layer 441 is a carbon black material layer to improve light absorption rate and provide uniformity of the layer. The metal light-shielding element 42 can be made of free-machining brass or a copper alloy, but is not limited to these materials.

[0142] The nanostructure layer 442 comprises multiple nanostructure units 443 and a connecting layer 444. The nanostructure units 443 form a nanoridge-like protrusion structure layer (not shown in the figure), and the connecting layer 444 is disposed between the light-absorbing layer 441 and the nanoridge-like protrusion structure layer. This provides a method for depositing nanostructure units 443 into internal pores, achieving rapid and easily mass-producible manufacturing. Furthermore, there is no gap between the top of the connecting layer 444 and the bottom of the nanoridge-like protrusion structure layer, meaning the connecting layer 444 and the nanoridge-like protrusion structure layer are tightly bonded, thereby obtaining a nanostructure layer 442 with strong structural stability. Specifically, the nanoridge-like protrusion structure layer can be made of alumina, and the connecting layer 444 can be made of silicon dioxide, but these are not limited to these materials.

[0143] The first toroidal surface 420 and the second toroidal surface 430 form an angle α; the thickness of the connecting layer 444 is d; the height of each nanostructure unit 443 is h; the length of the first toroidal surface 420 along the central axis O is L1, and the length of the second toroidal surface 430 along the central axis O is L2. The parameters satisfy the conditions in Table 4A below.

[0144]

[0145] <Fifth Embodiment>

[0146] Please refer to Figure 5 This is a schematic diagram of the imaging lens module 50 according to the fifth embodiment of this disclosure. Figure 5As can be seen, the imaging lens module 50 includes an imaging lens group 51, a metal light-shielding element 52, and a lens barrel 53. The metal light-shielding element 52 is correspondingly disposed to the imaging lens group 51, and is located on the image side of the imaging lens group 51. The lens barrel 53 is used to house the imaging lens group 51 and the metal light-shielding element 52. Furthermore, the metal light-shielding element 52 is a lens barrel, which can be used to mount the imaging lens group 51 and to block non-imaging light. It must be noted that... Figure 5 Two magnified diagrams at different magnifications are shown to clearly observe the structural details of the metal light-shielding element 52.

[0147] A metal light-shielding element 52 surrounds a central axis O and includes an outer diameter surface 510, a first annular surface 520, a second annular surface 530, and an anti-reflective layer 540. The outer diameter surface 510 surrounds the metal light-shielding element 52. Specifically, the first annular surface 520 is disposed opposite to the outer diameter surface 510 and is closer to the central axis O than the outer diameter surface 510; the second annular surface 530 is disposed opposite to the outer diameter surface 510 and is closer to the central axis O than the outer diameter surface 510; the first annular surface 520 and the second annular surface 530 are connected to form a minimum opening structure (not shown in the figure), wherein the minimum opening structure is a pointed opening structure to provide optical applications; the anti-reflective layer 540 is disposed on the first annular surface 520 and the second annular surface 530 and covers the minimum opening structure, and includes a light-absorbing layer 541 and a nanostructure layer 542, wherein the nanostructure layer 542 is disposed on the light-absorbing layer 541. Specifically, the connection between the first annular surface 520 and the second annular surface 530 is a minimum opening structure, wherein the anti-reflective layer 540 covers the minimum opening structure, and the minimum opening structure surrounds the central axis O to form a minimum opening 531. It must be noted that... Figure 5 The dashed line in the middle indicates the area where the anti-reflective layer 540 is installed.

[0148] The metal light-shielding element 52 undergoes a special process to prevent non-imaging light from being generated around the imaging lens assembly 51. Specifically, the metal light-shielding element 52 is coated with a light-absorbing layer 541 and a nanostructure layer 542 on its minimum opening structure and the surface surrounding it using a special process to prevent the generation of additional non-imaging light. The nanostructure layer 542 guides incident light hitting the surface of the metal light-shielding element 52 to the underlying light-absorbing layer 541, where the light is absorbed. This results in low-reflection characteristics on both the surface of the metal light-shielding element 52 and its minimum opening structure, providing high light-shielding efficiency. Furthermore, the light-absorbing layer 541 is a carbon black material layer to improve light absorption and provide uniformity of the layer. The metal light-shielding element 52 can be made of free-machining brass or a copper alloy, but is not limited to these materials.

[0149] The nanostructure layer 542 comprises multiple nanostructure units 543 and a connecting layer 544. The nanostructure units 543 form a nanoridge-like protrusion structure layer (not shown in the figure), and the connecting layer 544 is disposed between the light-absorbing layer 541 and the nanoridge-like protrusion structure layer. This provides a method for depositing nanostructure units 543 into internal pores, achieving rapid and easily mass-producible feasibility. Furthermore, there is no gap between the top of the connecting layer 544 and the bottom of the nanoridge-like protrusion structure layer, meaning the connecting layer 544 and the nanoridge-like protrusion structure layer are tightly bonded, thereby obtaining a nanostructure layer 542 with strong structural stability. Specifically, the nanoridge-like protrusion structure layer can be made of alumina, and the connecting layer 544 can be made of silicon dioxide, but these are not limited to these materials.

[0150] The first toroidal surface 520 and the second toroidal surface 530 form an angle α; the thickness of the connecting layer 544 is d; the height of each nanostructure unit 543 is h; the length of the first toroidal surface 520 along the central axis O is L1, and the length of the second toroidal surface 530 along the central axis O is L2. The parameters satisfy the conditions in Table 5A below.

[0151]

[0152] <Sixth Embodiment>

[0153] Please refer to Figure 6A and Figure 6B ,in Figure 6A A schematic diagram of the electronic device 60 according to the sixth embodiment of this disclosure is shown. Figure 6B Drawing according to Figure 6A Another schematic diagram of the electronic device 60 in the sixth embodiment. Figure 6A and Figure 6B As can be seen, the electronic device 60 is a smartphone. The electronic device 60 includes an imaging lens module (not shown), an electronic photosensitive element (not shown), and a user interface 61. The imaging lens module includes an imaging lens group (not shown) and at least one metal light-shielding element (not shown). The electronic photosensitive element is disposed on an imaging surface (not shown) of the imaging lens module, and the metal light-shielding element is correspondingly disposed with the imaging lens group. Further, the imaging lens module can be an ultra-wide-angle camera module 62, a high-pixel camera module 63, and a telephoto camera module 64, and the user interface 61 is a touch screen, but this is not a limitation. Specifically, the metal light-shielding element can be any of the metal light-shielding elements in the first to fifth embodiments described above, but this disclosure is not limited thereto.

[0154] The user enters the shooting mode through the user interface 61, which displays the screen and allows manual adjustment of the shooting angle to switch between different imaging lens modules. At this time, the imaging lens module gathers the imaging light onto the electronic photosensitive element and outputs electronic signals related to the image to the image signal processor (ISP) 65.

[0155] Depend on Figure 6B As can be seen, depending on the camera specifications of the electronic device 60, the electronic device 60 may also include an optical image stabilization component (not shown in the figure). Furthermore, the electronic device 60 may also include at least one focus assist module (not shown in the figure) and at least one sensing element (not shown in the figure). The focus assist module may be a color temperature compensated flash module 66, an infrared rangefinder, a laser focus module, etc. The sensing element may have the function of sensing physical momentum and kinetic energy, such as an accelerometer, a gyroscope, or a Hall effect element, to sense the shaking and tremors caused by the user's hand or the external environment. This is beneficial to the autofocus function and optical image stabilization component configured in the imaging lens module of the electronic device 60, so as to obtain good image quality and help the electronic device 60 according to the present disclosure to have multiple shooting modes, such as optimized Selfie, low light HDR (High Dynamic Range) imaging, and high resolution 4K video recording. In addition, users can directly view the camera's shooting screen through the user interface 61 and manually operate the framing range on the user interface 61 to achieve the WYSIWYG autofocus function.

[0156] Furthermore, the imaging lens module, electronic image sensor, optical image stabilization assembly, sensing element, and focus assist module can be mounted on a flexible printed circuit board (FPC) (not shown), and electrically connected to the imaging signal processing element 65 and other related components via a connector (not shown) to execute the shooting process. Current electronic devices, such as smartphones, tend to be thinner and lighter. By mounting the imaging lens module and related components on a flexible printed circuit board and then using a connector to integrate the circuitry onto the mainboard of the electronic device, the design and circuit layout requirements within the limited space of the electronic device can be met, providing greater flexibility. This also allows for more flexible control of the autofocus function of the imaging lens module through the touchscreen of the electronic device. In the sixth embodiment, the electronic device 60 may include multiple sensing elements and multiple focus assist modules. The sensing elements and focus assist modules are mounted on the flexible printed circuit board and at least one other flexible printed circuit board (not shown), and electrically connected to the imaging signal processing element 65 and other related components via corresponding connectors to execute the shooting process. In other embodiments (not shown), the sensing element and auxiliary optical element may also be mounted on the motherboard of the electronic device or other types of carrier boards, depending on the mechanical design and circuit layout requirements.

[0157] Furthermore, the electronic device 60 may further include, but is not limited to, a display unit, a control unit, a storage unit, a temporary storage unit (RAM), a read-only storage unit (ROM), or a combination thereof.

[0158] Figure 6C Drawing according to Figure 6A A schematic diagram of an image captured by the electronic device 60 in the sixth embodiment. Figure 6C It can be seen that the ultra-wide-angle camera module 62 can capture images of a larger range and has the function of capturing more scenery.

[0159] Figure 6D Drawing according to Figure 6A A schematic diagram of another image captured by the electronic device 60 in the sixth embodiment. Figure 6D It can be seen that the high-pixel camera module 63 can capture images within a certain range and also has high pixel count, with high resolution and low distortion.

[0160] Figure 6E Drawing according to Figure 6A A schematic diagram of another image captured by the electronic device 60 in the sixth embodiment. Figure 6E It is known that the telephoto camera module 64 has a high magnification function, which can capture images at a distance and magnify them to a high degree.

[0161] Depend on Figures 6C to 6EIt is understood that by using imaging lens modules with different focal lengths for framing and combining them with image processing technology, the electronic device 60 can achieve the function of zooming.

[0162] <Seventh Embodiment>

[0163] Please refer to Figure 7 This is a schematic diagram of the electronic device 70 according to the seventh embodiment of this disclosure. Figure 7 As can be seen, the electronic device 70 is a smartphone, and the electronic device 70 includes an imaging lens module (not shown) and an electronic photosensitive element (not shown). The imaging lens module includes an imaging lens group (not shown) and at least one metal light-shielding element (not shown). The electronic photosensitive element is disposed on an imaging surface (not shown) of the imaging lens module, and the metal light-shielding element is correspondingly disposed with the imaging lens group. Further, the imaging lens module can be an ultra-wide-angle camera module 711, 712, a wide-angle camera module 713, 714, a telephoto camera module 715, 716, 717, 718, and a TOF module (Time-Of-Flight) 719. The TOF module 719 can also be other types of imaging lens modules, and is not limited to this configuration. Specifically, the metal light-shielding element can be any of the metal light-shielding elements in the first to fifth embodiments described above, but this disclosure is not limited thereto.

[0164] Furthermore, the telephoto camera modules 717 and 718 are used to deflect light, but this disclosure is not limited to this.

[0165] Depending on the camera specifications of the electronic device 70, the electronic device 70 may also include an optical image stabilization component (not shown). Furthermore, the electronic device 70 may also include at least one focus assist module (not shown) and at least one sensing element (not shown). The focus assist module may be a color temperature-compensating flash module 720, an infrared rangefinder, a laser focus module, etc. The sensing element may have the function of sensing physical momentum and kinetic energy, such as an accelerometer, gyroscope, or Hall effect element, to sense the shaking and tremors caused by the user's hand or the external environment. This facilitates the performance of the autofocus function and optical image stabilization component configured in the imaging lens module of the electronic device 70, resulting in good image quality. This helps the electronic device 70 according to this disclosure to have multiple shooting modes, such as optimized Selfie, low-light HDR (High Dynamic Range) imaging, and high-resolution 4K video recording.

[0166] Furthermore, the structure and configuration of the remaining components in the seventh embodiment are the same as those in the sixth embodiment, and will not be described again here.

[0167] <Eighth Embodiment>

[0168] Please refer to Figures 8A to 8C ,in Figure 8A A schematic diagram of the vehicle tool 80 according to the eighth embodiment of this disclosure is shown. Figure 8B Drawing according to Figure 8A Another schematic diagram of the vehicle tool 80 in the eighth embodiment. Figure 8C Drawing according to Figure 8A Another schematic diagram of the vehicle tool 80 in the eighth embodiment. Figures 8A to 8C It is understood that the vehicle tool 80 includes multiple imaging lens modules 81 and an electronic photosensitive element (not shown). Each imaging lens module 81 includes an imaging lens group (not shown) and at least one metal light-shielding element (not shown). The electronic photosensitive element is disposed on an imaging surface (not shown) of the imaging lens module, and the metal light-shielding element is correspondingly disposed with the imaging lens group. In the eighth embodiment, the number of imaging lens modules 81 is six, and the metal light-shielding element can be any of the metal light-shielding elements in the first to fifth embodiments described above, but is not limited to this number.

[0169] Depend on Figure 8A and Figure 8B It is known that the imaging lens module 81 is an automotive imaging lens module, and the two lenses in the imaging lens module 81 are respectively located below the left and right rearview mirrors, and are used to capture image information from a viewing angle θ. Specifically, the viewing angle θ can satisfy the following condition: 40 degrees < θ < 90 degrees. In this way, image information within the range of the left and right side lanes can be captured.

[0170] Depend on Figure 8B It is understood that the other two imaging lens modules 81 can be installed in the space inside the vehicle tool 80. Specifically, the two imaging lens modules 81 are respectively installed near the rearview mirror and near the rear window. Furthermore, the imaging lens modules 81 can also be installed on the non-mirror surfaces of the left and right rearview mirrors of the vehicle tool 80, but are not limited thereto.

[0171] Depend on Figure 8C It is understood that the imaging lens module 81 can be positioned at the front and rear of the vehicle tool 80. The placement of the imaging lens module 81 at the front and rear of the vehicle tool 80, and below the left and right rearview mirrors, helps the driver obtain information about the external space outside the driver's cabin, such as external space information I1, I2, I3, and I4, but is not limited to these. This provides a wider field of view to reduce blind spots, thereby contributing to improved driving safety.

[0172] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A metal light-shielding element, characterized in that, Encircled by a central axis and comprising: An outer diameter surface surrounds the metal light-shielding element; A first annular surface is disposed opposite to the outer diameter surface, and the first annular surface is closer to the central axis than the outer diameter surface; A second annular surface is disposed opposite the outer diameter surface, the second annular surface being closer to the central axis than the outer diameter surface, and the first annular surface is connected to the second annular surface to form a minimum opening structure; and An anti-reflective layer is disposed on the first annular surface and the second annular surface, and covers the minimum opening structure, and includes: A light-absorbing layer; and A nanostructure layer is disposed on the light-absorbing layer; The nanostructure layer contains multiple nanostructure units, and the multiple nanostructure units form a nanoridge-like protrusion structure layer. The minimum opening structure is a pointed opening structure, and the first annular surface and the second annular surface form an angle α, which satisfies the following condition: 0 degrees < α ≤ 170 degrees.

2. The metal light-shielding element as described in claim 1, characterized in that, The light-absorbing layer is a carbon black material layer.

3. The metal light-shielding element as described in claim 1, characterized in that, The nanostructure layer includes a connecting layer, which is disposed between the light-absorbing layer and the nanoridge protrusion structure layer.

4. The metal light-shielding element as described in claim 3, characterized in that, The thickness of the connecting layer is d, and it satisfies the following condition: 30nm≤d≤500nm.

5. The metal light-shielding element as described in claim 1, characterized in that, Each of these nanostructure units has a height of h, and satisfies the following condition: 90nm≤h≤350nm.

6. The metal light-shielding element as described in claim 5, characterized in that, Each of these nanostructure units has a height of h, and satisfies the following condition: 90nm≤h≤290nm.

7. The metal light-shielding element as described in claim 1, characterized in that, The tip opening structure has at least one constriction structure, and the at least one constriction structure is closer to the central axis than the maximum outer diameter of the tip opening structure.

8. The metal light-shielding element as described in claim 1, characterized in that, The included angle is α, which satisfies the following condition: 10 degrees ≤ α ≤ 150 degrees.

9. The metal light-shielding element as described in claim 8, characterized in that, The included angle is α, which satisfies the following condition: 20 degrees ≤ α ≤ 120 degrees.

10. The metal light-shielding element as claimed in claim 1, characterized in that, Also includes: A groove structure is disposed on at least one of the first annular surface and the second annular surface, the groove structure is recessed toward the outer diameter surface, and at least a portion of the anti-reflective layer is disposed on the groove structure.

11. An imaging lens module, characterized in that, Include: An imaging lens group; and At least one metal light-shielding element as described in claim 1, wherein the at least one metal light-shielding element is disposed corresponding to the imaging lens group.

12. An electronic device, characterized in that, Include: The imaging lens module as described in claim 11; and An electronic photosensitive element is disposed on an imaging surface of the imaging lens module.

13. A metal light-shielding element, characterized in that, Encircled by a central axis and comprising: An outer diameter surface surrounds the metal light-shielding element; A first annular surface is disposed opposite to the outer diameter surface, and the first annular surface is closer to the central axis than the outer diameter surface; A second annular surface is disposed opposite the outer diameter surface, the second annular surface being closer to the central axis than the outer diameter surface, and the first annular surface is connected to the second annular surface to form a minimum opening structure; and An anti-reflective layer is disposed on the first annular surface and the second annular surface, and covers the minimum opening structure, and includes: A light-absorbing layer; and A nanostructure layer is disposed on the light-absorbing layer; The nanostructure layer contains multiple nanostructure units, and the multiple nanostructure units form a nanoridge-like protrusion structure layer. Wherein, the length of the first toroidal surface along the central axis is L1, and the length of the second toroidal surface along the central axis is L2, which satisfy the following conditions: 0.01mm≤L1+L2≤3.00mm.

14. The metal light-shielding element as described in claim 13, characterized in that, The light-absorbing layer is a carbon black material layer.

15. The metal light-shielding element as described in claim 13, characterized in that, The nanostructure layer includes a connecting layer, which is disposed between the light-absorbing layer and the nanoridge protrusion structure layer.

16. The metal light-shielding element as described in claim 15, characterized in that, The thickness of the connecting layer is d, and it satisfies the following condition: 30nm≤d≤500nm.

17. The metal light-shielding element as described in claim 13, characterized in that, Each of these nanostructure units has a height of h, and satisfies the following condition: 90nm≤h≤350nm.

18. The metal light-shielding element as claimed in claim 17, characterized in that, Each of these nanostructure units has a height of h, and satisfies the following condition: 90nm≤h≤290nm.

19. The metal light-shielding element as described in claim 13, characterized in that, The length of the first toroidal surface along the central axis is L1, and the length of the second toroidal surface along the central axis is L2, satisfying the following condition: 0.03≤L1 / L2≤5.

20. The metal light-shielding element as described in claim 13, characterized in that, Also includes: A groove structure is disposed on at least one of the first annular surface and the second annular surface, the groove structure is recessed toward the outer diameter surface, and at least a portion of the anti-reflective layer is disposed on the groove structure.

21. The metal light-shielding element as described in claim 13, characterized in that, The minimum opening structure has at least one constriction structure, and the at least one constriction structure is closer to the central axis than the maximum outer diameter of the minimum opening structure.

22. A metal light-shielding element, characterized in that, Encircled by a central axis and comprising: An outer diameter surface surrounds the metal light-shielding element; A first annular surface is disposed opposite to the outer diameter surface, and the first annular surface is closer to the central axis than the outer diameter surface; A second annular surface is disposed opposite the outer diameter surface, the second annular surface being closer to the central axis than the outer diameter surface, and the first annular surface being connected to the second annular surface; and An anti-reflective layer is disposed on at least one of the first annular surface and the second annular surface, and comprises: A light-absorbing layer; and A nanostructure layer is disposed on the light-absorbing layer; The nanostructure layer comprises multiple nanostructure units, which form a nanoridge-like protrusion structure layer. The height of each nanostructure unit is h, and it satisfies the following conditions: 90nm≤h≤350nm.

23. The metal light-shielding element as described in claim 22, characterized in that, Each of these nanostructure units has a height of h, and satisfies the following condition: 90nm≤h≤290nm.

24. The metal light-shielding element as described in claim 22, characterized in that, The light-absorbing layer is a carbon black material layer.

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