Imaging lens, shutter and electronic device

Abstract

An imaging lens has an optical axis and includes a lens, a shade and a lens barrel. The lens and the shade are accommodated in the lens barrel. The optical axis passes through the lens. The shade includes a first object side surface, a first image side surface, a first inner annular surface, a first microstructure and a first nanostructure layer. The first object side surface and the first image side surface are oppositely arranged. The first inner annular surface connects the first object side surface and the first image side surface, and the first inner annular surface surrounds the optical axis and defines a first light passing hole. The first microstructure is arranged at least on the first object side surface or the first image side surface. The first microstructure has a plurality of protrusions. The first nanostructure layer is arranged at least on the first inner annular surface. The first nanostructure layer has a plurality of ridge protrusions extending in a non-directional manner. The present application also discloses a shade suitable for the above-mentioned imaging lens and an electronic device having the above-mentioned imaging lens and the above-mentioned shade.

Description

Technical Field

[0001] This invention relates to an imaging lens, a light shield, and an electronic device, particularly an imaging lens and a light shield suitable for electronic devices. Background Technology

[0002] With the rapid advancement of technology, high-quality optical lenses have become an indispensable component. Furthermore, the applications of electronic devices equipped with optical lenses are expanding, leading to more diverse requirements for these lenses.

[0003] However, in recent years, traditional optical lenses have struggled to meet the high optical quality demands of diversified electronic products, especially since non-imaging light rays are easily reflected within the imaging lens, affecting image quality. Therefore, improving the structure of internal components of the imaging lens to reduce the intensity of non-imaging light reflections, in order to meet the high specifications required by today's electronic devices, has become an important issue in related fields. Summary of the Invention

[0004] In view of the problems mentioned above, the present invention discloses an imaging lens, a light shield, and an electronic device that helps to reduce the reflection of non-imaging light, thereby improving the overall optical quality.

[0005] An embodiment of the present invention discloses an imaging lens having an optical axis and including a lens, a light shield, and a lens barrel. The optical axis passes through the lens. The light shield includes a first object-side surface, a first image-side surface, a first inner ring surface, a first micron structure, and a first nanostructure layer. The first object-side surface and the first image-side surface are disposed opposite to each other. The first image-side surface is in solid contact with the lens. The first inner ring surface connects the first object-side surface and the first image-side surface, and the first inner ring surface surrounds the optical axis and defines a first light-transmitting aperture. The first micron structure is disposed at least in one of the first object-side surface and the first image-side surface. The first micron structure has a plurality of protrusions, and the average height of the first micron structure is greater than or equal to 0.25 microns and less than or equal to 19 microns. The first nanostructure layer is disposed at least in the first inner ring surface. The lens barrel houses the lens and the light shield. The lens barrel includes a second object-side surface, a second image-side surface, a second inner ring surface, and a second nanostructure layer. The second object-side surface and the second image-side surface are disposed opposite to each other. The second inner annular surface connects the second object-side surface and the second image-side surface, and the second inner annular surface surrounds the optical axis and defines a second light-transmitting aperture. A second nanostructure layer is disposed at least on the second inner annular surface. The materials of the first and second nanostructure layers comprise alumina. The first and second nanostructure layers have multiple ridge-like protrusions extending in a non-directional direction, and the average height of the first and second nanostructure layers is greater than or equal to 98 nanometers and less than or equal to 350 nanometers.

[0006] The shortest distance along the optical axis between the first and second nanostructure layers is Dbs, the distance along the optical axis between the object side and the image side of the lens barrel is Doi, the angle between the first inner torus and the optical axis is θ1, and the angle between the second inner torus and the optical axis is θ2. These conditions must be satisfied as follows:

[0007] 0 ≤ Dbs / Doi ≤ 0.94;

[0008] 0 degrees ≤ |θ1| ≤ 79 degrees; and

[0009] 0[degree]≤|θ2|≤82[degree].

[0010] Another embodiment of the present invention discloses an imaging lens having an optical axis and including a lens, a light shield, a spacer element, and a lens barrel. A first object-side surface and a first image-side surface are disposed opposite each other. The first image-side surface is in solid contact with the lens. A first inner ring surface connects the first object-side surface and the first image-side surface, and the first inner ring surface surrounds the optical axis and defines a first light-transmitting aperture. A first microstructure is disposed at least on one of the first object-side surface and the first image-side surface. The first microstructure has a plurality of protrusions, and the average height of the first microstructure is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers. A first nanostructure layer is disposed at least on the first inner ring surface. The spacer element and the light shield are disposed along the optical axis. The spacer element includes a second object-side surface, a second image-side surface, a second inner ring surface, and a second nanostructure layer. The second object-side surface and the second image-side surface are disposed opposite each other. The second inner ring surface connects the second object-side surface and the second image-side surface, and the second inner ring surface surrounds the optical axis and defines a second light-transmitting aperture. The second nanostructure layer is disposed at least on the second inner ring surface. The lens barrel houses the lens, the light shield, and the spacer element. The first and second nanostructure layers are made of aluminum oxide. The first and second nanostructure layers have multiple ridge-like protrusions extending in a non-directional direction, and the average height of the first and second nanostructure layers is greater than or equal to 98 nanometers and less than or equal to 350 nanometers.

[0011] The shortest distance along the optical axis between the first nanostructure layer and the second nanostructure layer of the spacer element is Dss; the distance along the optical axis between the object side and the image side of the lens barrel is Doi; the angle between the first inner ring surface and the optical axis is θ1; and the angle between the second inner ring surface and the optical axis is θ2. These conditions must be satisfied as follows:

[0012] 0 ≤ Dss / Doi ≤ 0.62;

[0013] 0 degrees ≤ |θ1| ≤ 79 degrees; and

[0014] 0[degree]≤|θ2|≤82[degree].

[0015] A further embodiment of the present invention discloses an imaging lens having an optical axis and including at least one reflective element, a lens, a light shield, and a lens barrel. The at least one reflective element has at least one reflective surface. The at least one reflective surface is used to deflect the direction of light transmission. The optical axis passes through the lens. The light shield includes a first object-side surface, a first image-side surface, a first inner annular surface, a first microstructure, and a first nanostructure layer. The first object-side surface and the first image-side surface are disposed opposite each other. The first image-side surface is in solid contact with the lens. The first inner annular surface connects the first object-side surface and the first image-side surface, and surrounds the optical axis and defines a first light-transmitting aperture. The first microstructure is disposed at least in one of the first object-side surface and the first image-side surface. The first microstructure has a plurality of protrusions, and the average height of the first microstructure is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers. The first nanostructure layer is disposed at least in the first inner annular surface. The lens barrel houses the lens and the light shield. The material of the first nanostructure layer includes aluminum oxide. The first nanostructure layer has multiple ridge-like protrusions extending in a non-directional direction, and the average height of the first nanostructure layer is greater than or equal to 98 nanometers and less than or equal to 350 nanometers.

[0016] The angle between the first inner torus and the optical axis is θ1, which satisfies the following condition:

[0017] 0 degrees ≤ |θ1| ≤ 79 degrees.

[0018] Another embodiment of the present invention discloses a light-shielding sheet comprising a first object-side surface, a first image-side surface, a first inner annular surface, a first micron structure, and a first nanostructure layer. One of the first object-side surface and the first image-side surface is used to contact a lens entity. The first inner annular surface connects the first object-side surface and the first image-side surface, and the first inner annular surface surrounds the optical axis and defines a first light-transmitting aperture. The first micron structure is disposed at least in one of the first object-side surface and the first image-side surface. The first micron structure has a plurality of protrusions, and the average height of the first micron structure is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers. The first nanostructure layer is disposed at least in the first inner annular surface. The material of the first nanostructure layer comprises alumina. The first nanostructure layer has a plurality of ridge-like protrusions extending in a non-directional direction, and the average height of the first nanostructure layer is greater than or equal to 98 nanometers and less than or equal to 350 nanometers.

[0019] The angle between the first inner ring surface and the optical axis is θ1, and the thickness of the first inner ring surface along the optical axis is T. It satisfies the following conditions:

[0020] 0 degrees ≤ |θ1| ≤ 79 degrees; and

[0021] 2 [micrometers] ≤ T ≤ 88 [micrometers].

[0022] In another embodiment of the present invention, an electronic device is disclosed that includes the imaging lens or the light shield described above.

[0023] According to the imaging lens, light shield, and electronic device disclosed in the above embodiments, by setting a first micrometer structure, non-imaging light can be scattered to reduce the reflection intensity of non-imaging light. Furthermore, due to factors such as manufacturing processes, it is not easy to set a micrometer-scale structure on the first inner ring surface. Therefore, using a first nanostructure layer with a smaller structural scale for reinforcement can overcome the limitations of existing processes and reduce the reflection of non-imaging light on the first inner ring surface. Moreover, it can be combined with the first micrometer structure to further improve the anti-reflection performance inside the imaging lens. Compared with conventional imaging lenses, it can reduce the chance of ghosting to a certain extent, thereby improving image quality.

[0024] Furthermore, by setting ridge-like protrusions, the equivalent refractive index of the first nanostructure layer can be gradually reduced from bottom to top, and reflection can be destroyed to reduce the generation of reflected light.

[0025] When θ1 or θ2 meets the above conditions, it can be combined with the nanostructure layer set on it to reduce the reflectivity of non-imaging light in the imaging lens, so as to avoid affecting the imaging quality.

[0026] When Dbs / Doi or Dss / Doi meet the above conditions, a light trap structure can be formed, allowing non-imaging light rays to be reflected between the two nanostructure layers.

[0027] When T meets the above conditions, surface reflection can be reduced by setting a first nanostructure layer at the nanoscale, while maintaining a thin and light thickness.

[0028] The above description of the content of this invention and the following description of the embodiments are used to demonstrate and explain the principles of this invention, and to provide a further explanation of the scope of the patent application of this invention. Attached Figure Description

[0029] Figure 1 This is a side cross-sectional view of the imaging lens according to the first embodiment of the present invention.

[0030] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the light-blocking plate of the imaging lens.

[0031] Figure 3 yes Figure 2 A schematic diagram of the AA area of ​​the light-blocking sheet magnified 3000 times according to the actual scale.

[0032] Figure 4 yes Figure 3 A schematic diagram of the AA region and the BB region magnified 5000 times according to the actual scale.

[0033] Figure 5 yes Figure 4 A schematic diagram of the CC region of the BB region magnified 30,000 times according to the actual scale.

[0034] Figure 6 yes Figure 4 A schematic diagram of the DD region of the BB region magnified 30,000 times according to the actual scale.

[0035] Figure 7 yes Figure 4 A schematic diagram of the EE region of the BB area, enlarged 30,000 times to the actual scale.

[0036] Figure 8 yes Figure 7 A schematic diagram of the FF region of the EE region magnified 100,000 times according to the actual scale.

[0037] Figure 9 yes Figure 1 A top-view schematic diagram of the light-blocking plate of the imaging lens.

[0038] Figure 10 yes Figure 9 A schematic diagram of the GG area of ​​the light-blocking sheet magnified 3000 times according to the actual scale.

[0039] Figure 11 yes Figure 10 A schematic diagram of the GG region and HH region magnified 30,000 times according to the actual scale.

[0040] Figure 12 yes Figure 9 A side view sectional view of the light-blocking plate cut along line segment 12-12'.

[0041] Figure 13 yes Figure 1 A three-dimensional schematic diagram of the lens barrel of the imaging lens after being cut open.

[0042] Figure 14 yes Figure 13 A schematic diagram of region II of the sectionalized microscope tube magnified 3000 times to the actual scale.

[0043] Figure 15 yes Figure 14 A schematic diagram of the JJ region of region II, magnified 10,000 times according to the actual scale.

[0044] Figure 16 yes Figure 15 A schematic diagram of the JJ and KK regions magnified 30,000 times according to the actual scale.

[0045] Figure 17 yes Figure 1 A top-view diagram of the lens barrel of the imaging lens.

[0046] Figure 18 yes Figure 17 A side view sectional view of the microscope tube cut along line segment 18-18'.

[0047] Figure 19 This is a top view schematic diagram of the light-shielding plate of the imaging lens according to the second embodiment of the present invention.

[0048] Figure 20 yes Figure 19 A side view sectional view of the light-blocking plate cut along the 20-20' line segment.

[0049] Figure 21 This is a side cross-sectional view of an imaging lens according to a third embodiment of the present invention.

[0050] Figure 22 yes Figure 21 A top view schematic diagram of the spacer element of the imaging lens.

[0051] Figure 23 yes Figure 22 The side view sectional view of the spacer element cut along line segment 23-23'.

[0052] Figure 24 yes Figure 21 A three-dimensional schematic diagram of the spacer element of the imaging lens.

[0053] Figure 25 This is a side cross-sectional view of an imaging lens according to a fourth embodiment of the present invention.

[0054] Figure 26 This is a side cross-sectional view of an imaging lens according to the fifth embodiment of the present invention.

[0055] Figure 27 This is an exploded schematic diagram of an electronic device according to a sixth embodiment of the present invention.

[0056] Figure 28 The present invention illustrates experimental data on the reflectivity of surfaces with nanostructured layers in two reference films for various wavelengths of light.

[0057] [Symbol Explanation]

[0058] 1, 3, 4, 5, 60a, 60b, 60c, 60d: Imaging lenses

[0059] 101, 201, 301, 401, 501: Optical axis

[0060] 10, 30a, 30b, 40, 50: Lenses

[0061] 11, 21, 31a, 31b, 41, 51: Light-blocking sheets

[0062] 111, 211, 311a, 311b, 411, 511: Side view of the first object

[0063] 112, 212, 312a, 312b, 412, 512: First image side view

[0064] 113, 213, 313a, 313b, 413, 513: First inner torus

[0065] 114, 214: First micrometer structure

[0066] 115, 215, 315a, 315b, 415, 515: First nanostructure layer

[0067] 12, 32, 42, 52: Lens tube

[0068] 121, 321: Side view of the second object

[0069] 122, 322: Second image side view

[0070] 123, 323: Second inner ring surface

[0071] 124: Second micrometer structure

[0072] 125, 325: Second nanostructure layer

[0073] 33: Spacer element

[0074] 331: Side view of the third object

[0075] 332: Third portrait, side view

[0076] 333: Third inner ring surface

[0077] 334: Third micrometer structure

[0078] 335: Third nanostructure layer

[0079] 44, 54: Reflective elements

[0080] 441, 541: Reflecting surfaces

[0081] 6: Electronic devices

[0082] A1: First light-transmitting aperture

[0083] A2: Second light-transmitting hole

[0084] A3: Third light-transmitting hole

[0085] H1, H2: Height

[0086] L1: Basal layer

[0087] L2: Covering layer

[0088] R, R': Radius of curvature

[0089] AA, BB, CC, DD, EE, FF, GG, HH, II, JJ, KK, W1, W2, X, Y1, Y2, Z: Region

[0090] θ1: Angle between the first inner torus and the optical axis

[0091] θ2: Angle between the second inner torus and the optical axis

[0092] θ3: Angle between the third inner torus and the optical axis

[0093] Dbs: The shortest distance along the optical axis between the first nanostructure layer and the second nanostructure layer.

[0094] Dss: The shortest distance along the optical axis between the first nanostructure layer and the third nanostructure layer (the second nanostructure layer of the spacer element).

[0095] Doi: The distance along the optical axis between the object side and the image side of the lens barrel.

[0096] T: Thickness of the first inner ring surface along the optical axis Detailed Implementation

[0097] The following detailed description of the features and advantages of the present invention in the embodiments is sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the disclosure of this specification, the scope of the claims, and the accompanying drawings, any person skilled in the art can easily understand the related objectives and advantages of the present invention. The following embodiments further illustrate the viewpoints of the present invention in detail, but are not intended to limit the scope of the present invention in any way.

[0098] This invention provides an imaging lens having an optical axis and comprising a lens element, a light-shielding plate, and a lens barrel. The optical axis passes through the lens element. The lens element and the light-shielding plate are housed within the lens barrel.

[0099] The light-shielding plate includes a first object-side surface, a first image-side surface, a first inner annular surface, a first micron structure, and a first nanostructure layer. The first object-side surface and the first image-side surface are disposed opposite each other. The first image-side surface is in contact with the lens body. The first inner annular surface connects the first object-side surface and the first image-side surface, and the first inner annular surface surrounds the optical axis and defines a first light-transmitting aperture. Specifically, the first light-transmitting aperture can be a through-hole formed by the smallest aperture of the light-shielding plate. Furthermore, when the first inner annular surface is not parallel to the optical axis and is formed as a conical surface, the first light-transmitting aperture can be defined by the tip formed by the first inner annular surface. Please refer to [reference needed]. Figure 20 The Y1 region is illustrated with a first inner annular surface 213 formed as a cone according to the second embodiment of the present invention.

[0100] The light-shielding sheet may consist of a plastic base layer covered by two overlay layers, wherein the plastic material may be polyimide (PI) or polyethylene terephthalate (PET). Please refer to [reference needed]. Figure 20 The Y1 region illustrates a light-shielding sheet 21 with a multilayer structure according to a second embodiment of the present invention, consisting of a base layer L1 covered by two covering layers L2. Alternatively, the light-shielding sheet may also be a base layer made of metal with a black pigment on its surface, wherein the metal material may be free-machining brass or a copper alloy. However, the light-shielding sheet of the present invention is not limited to the above structure.

[0101] The first micrometer structure is disposed at least on one of the first object side and the first image side. The first micrometer structure has multiple protrusions, and the average height of the first micrometer structure is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers. This allows non-imaging light to be scattered, thereby reducing the intensity of its reflection. Specifically, when viewed in cross-section, the multiple protrusions of the first micrometer structure may be arc-shaped. In other words, the first micrometer structure may consist of multiple spherical particles embedded in the surface of the light-shielding sheet, with some of the spherical particles exposed from the surface, resulting in multiple arc-shaped protrusions on the surface of the light-shielding sheet. Please refer to... Figure 3 , Figure 10 and Figure 12 The W1 region is illustrated with a first microstructure 114 having a plurality of protrusions disposed on the first object side 111 and the first image side 112 in accordance with the first embodiment of the present invention.

[0102] The first nanostructure layer is at least disposed on the first inner annular surface. In addition, the first nanostructure layer may also be disposed on the surface where the first micrometer structure is disposed, either on the first object side or the first image side. The first nanostructure layer may cover the first micrometer structure, and the first nanostructure layer may be in contact with the solid first micrometer structure. Since the first micrometer structure can scatter light, covering the first micrometer structure with the first nanostructure layer can further reduce the intensity of the scattered light. By combining two anti-reflective structures of different scales, the anti-reflective performance of the light-shielding sheet can be further improved. Please refer to... Figure 3 , Figures 5 to 7 The illustration shows a first nanostructure layer 115 disposed on the first object side 111, the first image side 112 and the first inner ring surface 113 according to the first embodiment of the present invention, and covering the first object side 111 and the first image side 112 and in solid contact with the first microstructure 114.

[0103] The microscope tube may include a second object-side surface, a second image-side surface, a second inner annular surface, a second microstructure, and a second nanostructure layer. The second object-side surface may be disposed opposite to the second image-side surface. The second inner annular surface may connect the second object-side surface and the second image-side surface, and the second inner annular surface may surround the optical axis and define a second light-transmitting aperture. Specifically, the second light-transmitting aperture may be a through-hole formed by the minimum aperture of the microscope tube. Furthermore, when the second inner annular surface is not parallel to the optical axis and is formed as a conical surface, the second light-transmitting aperture may be defined by the tip formed by the second inner annular surface. Please refer to [reference needed]. Figure 18 The diagram illustrates a second inner annular surface 123 formed as a cone according to a first embodiment of the present invention.

[0104] The second micrometer structure can be disposed at least on the second inner annular surface and can be integrally formed with the rest of the lens barrel. The second micrometer structure can have multiple protrusions, and the average height of the second micrometer structure can be greater than or equal to 0.32 micrometers and less than or equal to 22 micrometers. This allows for the scattering of non-imaging light rays, thereby reducing the intensity of their reflection. Please refer to... Figure 18 The illustration shows a second microstructure 124 disposed on the second inner annular surface 123 and having a plurality of protrusions in accordance with a first embodiment of the present invention.

[0105] The second nanostructure layer may be disposed at least on the second inner annular surface. The second nanostructure layer may cover the second micrometer structure, and the second nanostructure layer may be in contact with the solid second micrometer structure. By combining the micrometer structure and the nanostructure layer, the anti-reflective performance can be further improved. The second micrometer structure and the second nanostructure layer may also be disposed on the second object side. This improves the appearance quality of the lens barrel. Please refer to [reference needed]. Figure 17 and Figure 18 The illustration shows a second nanostructure layer 125 disposed on the second object side 121, the second image side 122 and the second inner ring surface 123 in accordance with the first embodiment of the present invention, and covering the second object side 121 and the second inner ring surface 123 and in solid contact with the second microstructure 124.

[0106] The imaging lens may also include a spacer element. The spacer element may be disposed along the optical axis with the light-blocking plate, and the spacer element may be housed within the lens barrel. The spacer element may include a third object-side surface, a third image-side surface, a third inner annular surface, a third micron structure, and a third nanostructure layer. The third object-side surface may be disposed opposite to the third image-side surface. The third inner annular surface may connect the third object-side surface and the third image-side surface, and the third inner annular surface may surround the optical axis and define a third light-transmitting aperture. Specifically, the third light-transmitting aperture may be a through-hole formed by the minimum aperture of the spacer element. Furthermore, when the third inner annular surface is not parallel to the optical axis and is formed as a conical surface, the third light-transmitting aperture may be defined by the tip formed by the third inner annular surface. Please refer to [reference needed]. Figure 23 The diagram illustrates a third inner annular surface 333 formed as a cone according to a third embodiment of the present invention.

[0107] The third micrometer structure can be disposed at least on the third inner ring surface. The third micrometer structure can have multiple protrusions, and these protrusions can be periodically arranged around the optical axis. The average height of the third micrometer structure can be greater than or equal to 3 micrometers and less than or equal to 182 micrometers. This allows for the scattering of non-imaging light rays, thereby reducing the intensity of their reflection. Please refer to [reference needed]. Figure 22 and Figure 24 The illustration shows a third micron structure 334 disposed on the third inner annular surface 333 according to the third embodiment of the present invention and having a plurality of protrusions periodically arranged around the optical axis 301.

[0108] The third nanostructure layer may be disposed at least on the third inner ring surface. The third nanostructure layer may cover the third micrometer structure, and the third nanostructure layer may be in contact with the third micrometer structure. By combining the micrometer structure and the nanostructure layer, the anti-reflective performance can be further improved. Please refer to [reference needed]. Figure 23 The illustration shows a third nanostructure layer 335 disposed on the third inner ring surface 333 and covering and substantially contacting the third microstructure 334 according to the third embodiment of the present invention.

[0109] The first, second, and third nanostructure layers can be uniformly distributed on the surfaces of the first, second, and third microstructures, respectively, while retaining the shape of the microstructure, so that the microstructure still has the function of scattering light.

[0110] The materials of the first, second, and third nanostructure layers may include aluminum oxide. Each of the first, second, and third nanostructure layers may have multiple ridge-like protrusions extending in a non-directional direction, and the average height of each of the first, second, and third nanostructure layers may be greater than or equal to 98 nanometers and less than or equal to 350 nanometers. When viewed in cross-section, the ridge-like protrusions exhibit a structure that is wider at the bottom and narrower at the top, resembling a mountain ridge. This structure allows the equivalent refractive index of the nanostructure layers to gradually decrease from the bottom to the top, and can disrupt reflection, thereby reducing the generation of reflected light. Please refer to [reference needed]. Figure 12 The W2 area and Figure 20 The Y2 region is illustrated with ridge-like protrusions that extend non-directionally and exhibit a structure that is wider at the bottom and narrower at the top, according to the first and second embodiments of the present invention, respectively.

[0111] Due to factors such as processing technology, it is not easy to set micron-scale structures on the first inner ring surface. Therefore, using a first nanostructure layer with a smaller structural scale for reinforcement can overcome the limitations of existing processes and reduce the reflection of non-imaging light on the first inner ring surface. Compared with conventional imaging lenses, this can reduce the chance of ghosting to a certain extent, thereby improving image quality.

[0112] The first, second, and third nanostructure layers can each have multiple pores on their surfaces. This allows for a more linear change in the equivalent refractive index of the nanostructure layers from bottom to top. Please refer to [reference needed]. Figure 8 and Figure 16 The diagrams illustrate the pores of the first nanostructure layer 115 and the second nanostructure layer 125 according to the first embodiment of the present invention.

[0113] The imaging lens may also include at least one reflective element. The at least one reflective element has at least one reflective surface. The at least one reflective surface is used to deflect the direction of light transmission. This allows the imaging lens to meet different requirements. The number of the at least one reflective surface may be at least two. Please refer to... Figure 25 The diagram illustrates at least two (four) reflective surfaces 441 according to a fourth embodiment of the present invention. The number of the at least one reflective element may be at least two. Please refer to... Figure 26 The illustration shows at least two reflective elements 54 according to the fifth embodiment of the present invention.

[0114] The angle between the first inner ring surface and the optical axis is θ1, which satisfies the following condition: 0 degrees ≤ |θ1| ≤ 79 degrees. This allows it to work in conjunction with the nanostructure layer on top of it to reduce the reflectivity of non-imaging light within the imaging lens, thus avoiding impact on image quality. Please refer to... Figure 20 and Figure 26 θ1 is illustrated according to the second and fifth embodiments of the present invention, respectively.

[0115] The angle between the second inner ring surface and the optical axis is θ2, which satisfies the following condition: 0 degrees ≤ |θ2| ≤ 82 degrees. This allows it to work in conjunction with the nanostructure layer on top of it to reduce the reflectivity of non-imaging light within the imaging lens, thus avoiding impact on image quality. Please refer to... Figure 18 The diagram illustrates θ2 according to the first embodiment of the present invention.

[0116] The angle between the third inner ring surface and the optical axis is θ3, which satisfies the following condition: 0 degrees ≤ |θ3| ≤ 82 degrees. This allows it to work in conjunction with the nanostructure layer on top of it to reduce the reflectivity of non-imaging light within the imaging lens, thus avoiding impact on image quality. Please refer to... Figure 23 The diagram illustrates θ3 according to a third embodiment of the present invention.

[0117] The shortest distance along the optical axis between the first and second nanostructure layers is Dbs, and the distance along the optical axis between the object side and the image side of the lens barrel is Doi, which satisfies the following condition: 0 ≤ Dbs / Doi ≤ 0.94. This allows the formation of a light trap structure, enabling non-imaging rays to be reflected between the two nanostructure layers. Please refer to... Figure 1The diagram illustrates Dbs and Doi according to the first embodiment of the present invention.

[0118] The shortest distance along the optical axis between the first and third nanostructure layers is Dss, and the distance along the optical axis between the object side and the image side of the lens barrel is Doi. These distances satisfy the condition: 0 ≤ Dss / Doi ≤ 0.62. This allows the formation of a light trap structure, enabling non-imaging rays to be reflected between the two nanostructure layers. Please refer to [reference needed]. Figure 21 The diagram illustrates Dss and Doi according to a third embodiment of the present invention.

[0119] The thickness of the first inner ring surface along the optical axis is T, which satisfies the following condition: 2 [micrometers] ≤ T ≤ 88 [micrometers]. This allows for the reduction of surface reflection by incorporating a nanoscale first nanostructure layer while maintaining a thin and light-blocking sheet. Please refer to... Figure 12 The W1 region is illustrated with T according to the first embodiment of the present invention.

[0120] The surface of one of the two surfaces, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It can satisfy the following conditions: R 7590 ≤0.65%. This allows the first nanostructure layer to maintain low reflectivity across a wide spectral band compared to conventional multilayer films, and also maintains low reflectivity for long-wavelength light, thus meeting the needs of some special imaging lenses, such as ToF sensing lenses. However, this invention is not limited to this application. The following conditions may also be met: R 7590 ≤0.5%. Among them, the surface of one of the two surfaces, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 370 nm to 400 nm. 3740 It can satisfy the following conditions: R 3740 ≤0.75%. Maintaining low reflectivity in this wavelength band improves imaging quality. Specifically, the surface of one of the two surfaces, the first object-side surface and the first image-side surface, where the first nanostructure layer is disposed, has an average reflectivity of R for light with wavelengths from 400 nm to 700 nm. 4070 It can satisfy the following conditions: R 4070 ≤0.5%. Maintaining low reflectivity in this band can improve image quality. Please refer to... Figure 28 This invention illustrates experimental data on the reflectance of surfaces with nanostructured layers disposed in two reference films for various wavelengths of light. Each reference film is a plastic substrate with a nanostructured layer disposed on its surface. Figure 28 The experimental data shows that one of the reference films (reference film-1) satisfies the following condition: R7590 =0.14%; R 3840 =0.08%; and R 4070 =0.03%, while another reference piece (reference piece-2) satisfies the following condition: R 7590 =0.14%; R 3840 =0.07%; and R 4070 =0.03%. Figure 28 The reflectance experimental data for the reference film can be used as a reflectance reference for nanostructure layers deposited on the surfaces of various optical components. It is worth noting that the aforementioned R... 3840 R is defined as the average reflectivity of the surface of an optical element with a nanostructure layer for light with wavelengths from 380 nm to 400 nm. 3740 The subordinate feature; furthermore, in this invention, the above-mentioned R 3740 R 3840 R 4070 With R 7590 It is applicable not only to surfaces with a first nanostructure layer, but also to surfaces with a second or third nanostructure layer.

[0121] The various technical features in the imaging lens or light shield of the present invention can be combined and configured to achieve the corresponding effects.

[0122] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0123] <First Embodiment>

[0124] Please refer to Figures 1 to 18 ,in Figure 1 This is a side cross-sectional view of the imaging lens according to the first embodiment of the present invention. Figure 2 yes Figure 1 A three-dimensional diagram of the light-shielding plate of an imaging lens. Figure 3 yes Figure 2 A schematic diagram of the AA area of ​​the light-blocking sheet magnified 3000 times to the actual scale. Figure 4 yes Figure 3 A schematic diagram of the AA region and the BB region magnified 5000 times to the actual scale. Figure 5 yes Figure 4 A schematic diagram of the CC region of the BB region magnified 30,000 times according to the actual scale. Figure 6 yes Figure 4 A schematic diagram of the DD region of the BB region, magnified 30,000 times to the actual scale. Figure 7 yes Figure 4 A schematic diagram of the EE region of the BB area, enlarged 30,000 times to the actual scale. Figure 8 yes Figure 7A schematic diagram of the FF region of the EE region, magnified 100,000 times to the actual scale. Figure 9 yes Figure 1 A top-view diagram of the lens hood of an imaging lens. Figure 10 yes Figure 9 A schematic diagram of the GG area of ​​the light-blocking sheet magnified 3000 times to the actual scale. Figure 11 yes Figure 10 A schematic diagram of the GG region and HH region magnified 30,000 times to the actual scale. Figure 12 yes Figure 9 A side sectional view of the light-shielding plate cut along line segment 12-12'. Figure 13 yes Figure 1 A three-dimensional schematic diagram of the lens barrel of the imaging lens after cross-section. Figure 14 yes Figure 13 A schematic diagram of region II of the sectional microscope tube, magnified 3000 times to scale. Figure 15 yes Figure 14 A schematic diagram of region II, JJ region, magnified 10,000 times to scale. Figure 16 yes Figure 15 A diagram showing the JJ and KK regions magnified 30,000 times to their actual size. Figure 17 yes Figure 1 A top-view diagram of the imaging lens barrel, and Figure 18 yes Figure 17 A side view sectional view of the microscope tube cut along line segment 18-18'.

[0125] In this embodiment, the imaging lens 1 has an optical axis 101 and includes an optical element assembly (not otherwise labeled) comprising a lens 10 and a light-shielding plate 11, as well as a lens barrel 12. The optical axis 101 passes through the lens 10. The lens 10 and the light-shielding plate 11 are housed within the lens barrel 12. It is worth noting that, in addition to the lens 10 and the light-shielding plate 11, the optical element assembly also includes other lenses, other general light-shielding plates, and fixing rings, etc. (not otherwise labeled), and the elements in the optical element assembly are not limited to the outlines shown in the figures.

[0126] The light-shielding plate 11 includes a first object-side surface 111, a first image-side surface 112, a first inner annular surface 113, a first micron structure 114, and a first nanostructure layer 115. The first object-side surface 111 and the first image-side surface 112 are disposed opposite to each other. The first image-side surface 112 is in solid contact with the lens 10. The first inner annular surface 113 connects the first object-side surface 111 and the first image-side surface 112, and the first inner annular surface 113 defines a first light-transmitting hole A1 around the optical axis 101 and as the side with the smallest aperture of the light-shielding plate 11.

[0127] The first micrometer structure 114 is disposed on the first object-side surface 111 and the first image-side surface 112. For example... Figure 10 and Figure 12 As shown in region W1, the first microstructure 114 has multiple protrusions (unlabeled), and the average height of the first microstructure 114 (e.g., Figure 12 The height H1 marked in region W1 is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers. For example... Figure 12 As shown in region W1, when viewed from the cross-section of the first micron structure 114, the protrusion of the first micron structure 114 is arc-shaped, which forms an arc-shaped protrusion on the surface of the light-shielding sheet 11.

[0128] In addition to being disposed on the first inner ring surface 113, the first nanostructure layer 115 is also disposed on the first object side surface 111 and the first image side surface 112 to cover and physically contact the first microstructure 114 on the first object side surface 111 and the first image side surface 112.

[0129] like Figure 3 and Figure 10 As shown, the first nanostructure layer 115 is uniformly distributed on the surface of the first microstructure 114 and retains the shape of the first microstructure 114.

[0130] like Figures 5 to 7 , Figure 11 and Figure 12 As shown in region W2, the first nanostructure layer 115 has multiple ridge-like protrusions (unlabeled) extending in a non-directional direction, and the average height of the first nanostructure layer 115 (e.g., Figure 12 The height H2 indicated in region W2 is greater than or equal to 98 nanometers and less than or equal to 350 nanometers. For example... Figure 12 As shown in region W2, when viewed in cross-section of the ridge-like protrusions of the first nanostructure layer 115, the ridge-like protrusions exhibit a structure that is wider at the bottom and narrower at the top, resembling a mountain ridge. Furthermore, as... Figure 8 As shown, the first nanostructure layer 115 has multiple pores (not otherwise labeled) on its surface.

[0131] The lens barrel 12 includes a second object-side surface 121, a second image-side surface 122, a second inner annular surface 123, a second microstructure 124, and a second nanostructure layer 125. The second object-side surface 121 and the second image-side surface 122 are disposed opposite to each other. The second inner annular surface 123 connects the second object-side surface 121 and the second image-side surface 122, and the second inner annular surface 123 defines a second light-transmitting aperture A2 around the optical axis 101 and as the side of the minimum aperture of the lens barrel 12.

[0132] The second micrometer structure 124 is disposed on the second object side surface 121 and the second inner annular surface 123, and is integrally formed with the rest of the lens barrel 12. For example... Figure 14 and Figure 18As shown in region X, the second microstructure 124 has multiple protrusions (unlabeled), and the average height of the second microstructure 124 (e.g., Figure 18 The height H1 marked in region X is greater than or equal to 0.32 micrometers and less than or equal to 22 micrometers.

[0133] In addition to being disposed on the second image side surface 122, the second nanostructure layer 125 is also disposed on the second object side surface 121 and the second inner ring surface 123 to cover and physically contact the second microstructure 124 on the second object side surface 121 and the second inner ring surface 123.

[0134] like Figure 14 and Figure 18 As shown, the second nanostructure layer 125 is uniformly distributed on the surface of the second microstructure 124 and retains the shape of the second microstructure 124.

[0135] like Figure 15 As shown, the second nanostructure layer 125 has multiple ridge-like protrusions (not otherwise labeled) extending in a non-directional direction, and the average height of the second nanostructure layer 125 is greater than or equal to 98 nanometers and less than or equal to 350 nanometers. Furthermore, as... Figure 16 As shown, the second nanostructure layer 125 has multiple pores (not otherwise labeled) on its surface.

[0136] The angle between the first inner toroidal surface 113 and the optical axis 101 is θ1, which satisfies the following condition: |θ1|=0 [degrees].

[0137] The angle between the second inner torus 123 and the optical axis 101 is θ2, which satisfies the following conditions: |θ2| = 40 degrees (object side); and |θ2| = 70 degrees (image side), as follows. Figure 18 As shown.

[0138] The shortest distance between the first nanostructure layer 115 and the second nanostructure layer 125 along the optical axis 101 is Dbs, and the distance between the object side and the image side of the lens barrel 12 along the optical axis 101 is Doi, which satisfies the following conditions: Dbs = 0.855 [mm]; Doi = 3.395 [mm]; and Dbs / Doi = 0.252.

[0139] The thickness of the first inner annular surface 113 along the optical axis 101 is T, which satisfies the following condition: T = 16 [micrometers], as shown below. Figure 12 As shown in region W1.

[0140] The average reflectance of the surfaces of the first object side 111 and the first image side 112, on which the first nanostructure layer 115 is disposed, to light with wavelengths from 750 nm to 900 nm is R. 7590 It satisfies the following conditions: R 7590≤0.65%. The average reflectance of the surfaces of the first object side 111 and the first image side 112, on which the first nanostructure layer 115 is disposed, to light with wavelengths from 370 nm to 400 nm is R. 3740 It satisfies the following conditions: R 3740 ≤0.75%. The average reflectance of the surfaces of the first object side 111 and the first image side 112, on which the first nanostructure layer 115 is disposed, to light with wavelengths from 400 nm to 700 nm is R. 4070 It satisfies the following conditions: R 4070 ≤0.5%.

[0141] <Second Embodiment>

[0142] Please refer to Figures 19 to 20 ,in Figure 19 This is a top view schematic diagram of the light-shielding plate of the imaging lens according to the second embodiment of the present invention, and Figure 20 yes Figure 19 The following is a side sectional view of the light-shielding plate cut along line segment 20-20'. The following description only addresses the differences between this embodiment and the first embodiment; the rest will be omitted.

[0143] In this embodiment, the imaging lens (not otherwise labeled) has an optical axis 201 and includes at least a light-shielding plate 21. The light-shielding plate 21 includes a first object-side surface 211, a first image-side surface 212, a first inner ring surface 213, a first microstructure 214, and a first nanostructure layer 215. The first object-side surface 211 and the first image-side surface 212 are disposed opposite to each other. The first inner ring surface 213 connects the first object-side surface 211 and the first image-side surface 212, and the first inner ring surface 213 surrounds the optical axis 201 and defines a first light-transmitting aperture A1 as the side of the light-shielding plate 21 with the smallest aperture.

[0144] like Figure 19 As shown, the first light-transmitting hole A1 defined by the first inner annular surface 213 of the light-shielding plate 21 has multiple radii of curvature R, R' on its inner edge, so that the edge of the first light-transmitting hole A1 is wavy. However, the present invention is not limited thereto. In some embodiments, the edge of the first light-transmitting hole may also be of any shape.

[0145] like Figure 20As shown in region Y1, the first inner ring surface 213 of the light-shielding sheet 21 is not parallel to the optical axis 201 and is formed in a conical shape, but the present invention is not limited to the conical shape of the first inner ring surface 213. Furthermore, the light-shielding sheet 21 has a multi-layer structure. Specifically, the light-shielding sheet 21 has a plastic base layer L1 covered by two coating layers L2 on its object side and image side, wherein the plastic material can be polyimide or polyethylene terephthalate. However, the present invention is not limited thereto. In some embodiments, the light-shielding sheet may also be a metal base layer with black pigment on its object side and image side, wherein the metal material can be free-machining brass or a copper alloy.

[0146] The first micron structure 214 is disposed on the first object-side surface 211 and the first image-side surface 212. The first nanostructure layer 215, in addition to being disposed on the first inner annular surface 213, is also disposed on the first object-side surface 211 and the first image-side surface 212 to cover and substantially contact the first micron structure 214 on the first object-side surface 211 and the first image-side surface 212. For example... Figure 20 As shown in the Y2 region, the first nanostructure layer 215 has multiple ridge-like protrusions (unlabeled) extending in a non-directional direction.

[0147] The angle between the first inner torus 213 and the optical axis 201 is θ1, which satisfies the following condition: |θ1|=45 [degrees], as shown below. Figure 20 As shown.

[0148] <Third Embodiment>

[0149] Please refer to Figures 21 to 24 ,in Figure 21 This is a side cross-sectional view of the imaging lens according to the third embodiment of the present invention. Figure 22 yes Figure 21 A top-view schematic diagram of the spacing element of the imaging lens. Figure 23 yes Figure 22 The side sectional view of the spacer element cut along line segment 23-23', and Figure 24 yes Figure 21 A three-dimensional schematic diagram of the spacer element of the imaging lens.

[0150] In this embodiment, the imaging lens 3 has an optical axis 301 and includes an optical element group (not otherwise labeled) comprising two lens elements 30a and 30b, two light-shielding plates 31a and 31b, and a spacer element 33, as well as a lens barrel 32. The optical axis 301 passes through the lens elements 30a and 30b. The lens elements 30a and 30b, the light-shielding plates 31a and 31b, and the spacer element 33 are housed within the lens barrel 32. It is worth noting that, in addition to the lens elements 30a and 30b, the light-shielding plates 31a and 31b, and the spacer element 33, the optical element group also includes other lens elements, other general light-shielding plates, other general spacer elements, and fixing rings, etc., optical elements (not otherwise labeled), and the elements in the optical element group are not limited to the outlines shown in the figures.

[0151] The light-shielding plate 31a includes a first object-side surface 311a, a first image-side surface 312a, a first inner ring surface 313a, and a first nanostructure layer 315a. The first object-side surface 311a and the first image-side surface 312a are disposed opposite to each other. The first image-side surface 312a is in solid contact with the lens 30a. The first inner ring surface 313a connects the first object-side surface 311a and the first image-side surface 312a, and surrounds the optical axis 301.

[0152] The light-shielding sheet 31a may have a first micron structure (not shown) on the first object side 311a and the first image side 312a, just like the light-shielding sheet 11 in the first embodiment.

[0153] In addition to being disposed on the first inner ring surface 313a, the first nanostructure layer 315a is also disposed on the first object side surface 311a and the first image side surface 312a to cover and physically contact the first micron structure on the first object side surface 311a and the first image side surface 312a.

[0154] The light-shielding plate 31b includes a first object-side surface 311b, a first image-side surface 312b, a first inner ring surface 313b, and a first nanostructure layer 315b. The first object-side surface 311b and the first image-side surface 312b are disposed opposite to each other. The first image-side surface 312b is in solid contact with the lens 30b. The first inner ring surface 313b connects the first object-side surface 311b and the first image-side surface 312b, and surrounds the optical axis 301.

[0155] The light-shielding sheet 31b may have a first micron structure (not shown) on the first object side 311b and the first image side 312b, just like the light-shielding sheet 11 in the first embodiment.

[0156] In addition to being disposed on the first inner annular surface 313b, the first nanostructure layer 315b is also disposed on the first object side surface 311b and the first image side surface 312b to cover and physically contact the first micron structure on the first object side surface 311b and the first image side surface 312b.

[0157] The lens barrel 32 includes a second object-side surface 321, a second image-side surface 322, a second inner ring surface 323, and a second nanostructure layer 325. The second object-side surface 321 and the second image-side surface 322 are disposed opposite to each other. The second inner ring surface 323 connects the second object-side surface 321 and the second image-side surface 322, and the second inner ring surface 323 surrounds the optical axis 301 and serves as the side of the minimum aperture of the lens barrel 32 to define the aperture value of the imaging lens 3 as 1.4.

[0158] The lens barrel 32 may have an integrally formed second micron structure (not shown) on the second object side surface 321 and the second inner ring surface 323, just like the lens barrel 12 in the first embodiment.

[0159] In addition to being disposed on the second image side surface 322, the second nanostructure layer 325 is also disposed on the second object side surface 321 and the second inner ring surface 323 to cover and physically contact the second micron structure on the second object side surface 321 and the second inner ring surface 323.

[0160] The spacer element 33 is disposed in contact with the light-shielding plate 31b along the optical axis 301. The spacer element 33 includes a third object-side surface 331, a third image-side surface 332, a third inner ring surface 333, a third micron structure 334, and a third nanostructure layer 335. The third object-side surface 331 and the third image-side surface 332 are disposed opposite to each other. The third inner ring surface 333 connects the third object-side surface 331 and the third image-side surface 332, and the third inner ring surface 333 surrounds the optical axis 301 and defines a third light-transmitting aperture A3 as the side of the spacer element 33 with the smallest aperture.

[0161] The third micrometer structure 334 is disposed on the third inner annular surface 333. For example... Figure 22 and Figure 24 As shown, the third micrometer structure 334 has multiple triangular prism-shaped protrusions (unlabeled), and these protrusions are periodically arranged along the circumferential direction with the optical axis 301 as the center. The average height of the third micrometer structure 334 (e.g., Figure 23 The height H1 marked in the Z region is greater than or equal to 3 micrometers and less than or equal to 182 micrometers.

[0162] The third nanostructure layer 335 is disposed on the third inner ring surface 333 to cover and physically contact the third microstructure 334 on the third inner ring surface 333.

[0163] like Figure 23 and Figure 24 As shown, the third nanostructure layer 335 is uniformly distributed on the surface of the third microstructure 334 and retains the shape of the third microstructure 334.

[0164] The third nanostructure layer 335 has multiple ridge-like protrusions (not shown) extending in a non-directional direction, and the average height of the third nanostructure layer 335 is greater than or equal to 98 nanometers and less than or equal to 350 nanometers. Furthermore, the third nanostructure layer 335 has multiple pores (not shown) on its surface.

[0165] The angle between the first inner toroidal surface 313 and the optical axis 301 is θ1, which satisfies the following condition: |θ1|=0 [degrees].

[0166] The angle between the third inner torus 333 and the optical axis 301 is θ3, which satisfies the following conditions: |θ3| = 15 degrees (object side); and |θ3| = 57.59 degrees (image side), as follows. Figure 23 As shown.

[0167] The shortest distance between the first nanostructure layer 315 and the second nanostructure layer 325 along the optical axis 301 is Dbs, and the distance between the object side and the image side of the lens barrel 32 along the optical axis 301 is Doi, which satisfy the following conditions: Dbs = 0 [mm]; Doi = 6.14 [mm]; and Dbs / Doi = 0. (That is, the first nanostructure layer 315 and the second nanostructure layer 325 are disposed adjacent to each other in contact)

[0168] The shortest distance between the first nanostructure layer 315 and the third nanostructure layer 335 along the optical axis 301 is Dss, and the distance between the object side and the image side of the lens barrel 32 along the optical axis 301 is Doi, which satisfies the following conditions: Dss = 0.1 [mm]; Doi = 6.14 [mm]; and Dss / Doi = 0.016.

[0169] The average reflectance of the surfaces of the first object side 311 and the first image side 312, on which the first nanostructure layer 315 is disposed, to light with wavelengths from 750 nm to 900 nm is R. 7590 It satisfies the following conditions: R 7590 ≤0.65%. The average reflectance of the surfaces of the first object side 311 and the first image side 312, on which the first nanostructure layer 315 is disposed, to light with wavelengths from 370 nm to 400 nm is R. 3740 It satisfies the following conditions: R 3740 ≤0.75%. The average reflectance of the surfaces of the first object side 311 and the first image side 312, on which the first nanostructure layer 315 is disposed, to light with wavelengths from 400 nm to 700 nm is R. 4070 It satisfies the following conditions: R 4070 ≤0.5%.

[0170] <Fourth Embodiment>

[0171] Please refer to Figure 25 This is a side cross-sectional view of the imaging lens according to the fourth embodiment of the present invention.

[0172] In this embodiment, the imaging lens 4 has an optical axis 401 and includes an optical element assembly (not otherwise labeled) comprising a lens 40 and a light-shielding plate 41, a lens barrel 42, and a reflecting element 44. The optical axis 401 passes through the lens 40. The lens 40 and the light-shielding plate 41 are housed within the lens barrel 42. It is worth noting that, in addition to the lens 40 and the light-shielding plate 41, the optical element assembly also includes other lenses, other general light-shielding plates, and fixing rings, etc. (not otherwise labeled), and the elements in the optical element assembly are not limited to the outlines shown in the figures.

[0173] The light-shielding plate 41 includes a first object-side surface 411, a first image-side surface 412, a first inner ring surface 413, and a first nanostructure layer 415. The first object-side surface 411 and the first image-side surface 412 are disposed opposite to each other. The first image-side surface 412 is in solid contact with the lens 40. The first inner ring surface 413 connects the first object-side surface 411 and the first image-side surface 412, and surrounds the optical axis 401.

[0174] The light-shielding sheet 41 may have a first micron structure (not shown) on the first object side surface 411, as in the light-shielding sheet 11 of the first embodiment.

[0175] In addition to being disposed on the first inner annular surface 413, the first nanostructure layer 415 is also disposed on the first object side surface 411 to cover and physically contact the first micron structure on the first object side surface 411.

[0176] The reflecting element 44 is disposed on the image side of the lens barrel 42 and has four reflecting surfaces 441. For example... Figure 25 As shown, the reflecting surface 441 deflects the direction of light rays from the lens tube 42 (i.e., deflects the optical axis 401).

[0177] The angle between the first inner toroidal surface 413 and the optical axis 401 is θ1, which satisfies the following condition: |θ1|=0 [degrees].

[0178] <Fifth Embodiment>

[0179] Please refer to Figure 26 This is a side cross-sectional view of an imaging lens according to a fifth embodiment of the present invention.

[0180] In this embodiment, the imaging lens 5 has an optical axis 501 and includes an optical element group (not otherwise labeled) comprising a lens 50 and a light-shielding plate 51, a lens barrel 52, and two reflective elements 54. The optical axis 501 passes through the lens 50. The lens 50 and the light-shielding plate 51 are housed within the lens barrel 52. It is worth noting that, in addition to the lens 50 and the light-shielding plate 51, the optical element group also includes other lenses, other general light-shielding plates, and fixing rings, etc. (not otherwise labeled), and the elements in the optical element group are not limited to the outlines shown in the figures.

[0181] The light-shielding plate 51 includes a first object-side surface 511, a first image-side surface 512, a first inner ring surface 513, and a first nanostructure layer 515. The first object-side surface 511 and the first image-side surface 512 are disposed opposite to each other. The first image-side surface 512 is in solid contact with the lens 50. The first inner ring surface 513 connects the first object-side surface 511 and the first image-side surface 512, and surrounds the optical axis 501.

[0182] The light-shielding sheet 51 may have a first micron structure (not shown) on the first object side 511 and the first image side 512, just like the light-shielding sheet 11 in the first embodiment.

[0183] In addition to being disposed on the first inner ring surface 513, the first nanostructure layer 515 is also disposed on the first object side surface 511 and the first image side surface 512 to cover and physically contact the first micron structure on the first object side surface 511 and the first image side surface 512.

[0184] Reflective elements 54 are respectively disposed on the object side and image side of the lens barrel 52, and each has a reflective surface 541. For example... Figure 26 As shown, the reflecting surface 541 on the object side of the lens tube 52 deflects the incident light rays and directs them toward the lens tube 52, and the reflecting surface 541 on the image side of the lens tube 52 deflects the light rays from the lens tube 52 (i.e., deflects the optical axis 501).

[0185] The angle between the first inner torus 513 and the optical axis 501 is θ1, which satisfies the following conditions: |θ1| = 66.8 degrees (object side); and |θ1| = 66.8 degrees (image side), as follows: Figure 26 As shown.

[0186] <Sixth Embodiment>

[0187] Please refer to Figure 27 This is an exploded schematic diagram of an electronic device according to a sixth embodiment of the present invention.

[0188] In this embodiment, the electronic device 6 is a smartphone. The electronic device 6 includes an imaging lens 60a, an imaging lens 60b, an imaging lens 60c, an imaging lens 60d, a flash module, a focus assist module, an image signal processor, a display device, and an image software processor (not shown). Imaging lenses 60a, 60b, 60c, and 60d are all disposed on the same side of the electronic device 6, while the display device is disposed on the other side. Specifically, imaging lens 60a is the imaging lens 5 of the fifth embodiment, and imaging lens 60b is the imaging lens 1 of the first embodiment. However, the present invention is not limited thereto, and imaging lens 60a or 60b may also be, for example, imaging lenses from other embodiments of the present invention described above.

[0189] Imaging lens 60a is an ultra-telephoto telephoto lens, imaging lens 60b is a telephoto telephoto lens, imaging lens 60c is a wide-angle main lens, and imaging lens 60d is an ultra-wide-angle lens. The angle of view of imaging lens 60a is, for example, 5 to 30 degrees, that of imaging lens 60b is, for example, 30 to 60 degrees, that of imaging lens 60c is, for example, 65 to 90 degrees, and that of imaging lens 60d is, for example, 93 to 175 degrees. In this embodiment, imaging lenses 60a, 60b, 60c, and 60d have different angles of view, allowing the electronic device 6 to provide different magnifications to achieve optical zoom shooting effects. Furthermore, imaging lens 60a is an ultra-telephoto telephoto lens with a reflective element 54, which facilitates the thinning of the electronic device 6. The above-described electronic device 6 is an example containing multiple imaging lenses 60a, 60b, 60c, and 60d, but the number and configuration of the imaging lenses are not intended to limit the invention. When the user photographs a subject, the electronic device 6 uses imaging lenses 60a, 60b, 60c, or 60d to focus light and capture an image. It then activates the flash module for supplemental lighting and uses the subject distance information provided by the focus assist module for rapid focusing. Furthermore, the image signal processor performs image optimization processing to further improve the image quality produced by the imaging lenses, while also providing zoom functionality. The focus assist module can employ an infrared or laser focus assist system to achieve rapid focusing. The display device can use a touchscreen or a physical shooting button, combined with the diverse functions of the image software processor for image capture and processing. The image processed by the image software processor can then be displayed on the display device.

[0190] It should be noted that, Figure 27 The lens cover being separated from the main body is only for the purpose of illustrating the lens module inside the electronic device 6, and does not mean that the lens cover is detachable. This invention is not limited thereto.

[0191] The imaging lens of this invention is not limited to application in smartphones. It can also be applied to mobile focusing systems as needed, offering both 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, dashcams, reversing cameras, 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.

[0192] Although the present invention has been disclosed above with reference to the foregoing embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be determined by the claims appended to this specification.

Claims

1. An imaging lens having an optical axis, characterized in that, The imaging lens includes: A lens, wherein the optical axis passes through the lens; A light-blocking sheet, comprising: The first object's side view; A first image side surface, wherein the first image side surface is disposed opposite to the first object side surface; A first inner ring surface connects the first object side surface and the first image side surface, wherein the first inner ring surface surrounds the optical axis and defines a first light-transmitting hole; A first micrometer structure is disposed at least on one of the first object side and the first image side, wherein the first micrometer structure has a plurality of protrusions, and the average height of the first micrometer structure is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers; and A first nanostructure layer, at least disposed on the first inner annular surface; and A lens barrel housing the lens and the light-shielding plate, and the lens barrel comprising: The second side of the object; A second image side surface, wherein the second image side surface is disposed opposite to the second object side surface; A second inner annular surface connects the second object side surface and the second image side surface, wherein the second inner annular surface surrounds the optical axis and defines a second light-transmitting aperture; as well as A second nanostructure layer is disposed at least on the second inner annular surface; The light-shielding sheet is made of plastic. When viewed in cross-section of the first micron structure, the protrusions of the first micron structure are arc-shaped. The first nanostructure layer and the second nanostructure layer have multiple ridge-like protrusions extending in a non-directional direction, and the average height of the first nanostructure layer and the second nanostructure layer is greater than or equal to 98 nanometers and less than or equal to 350 nanometers. Wherein, the shortest distance between the first nanostructure layer and the second nanostructure layer along the optical axis is Dbs, the distance between the object side and the image side of the lens barrel along the optical axis is Doi, the angle between the first inner ring surface and the optical axis is θ1, and the angle between the second inner ring surface and the optical axis is θ2, which satisfies the following conditions: 0 ≤ Dbs / Doi ≤ 0.94; 0 degrees ≤ |θ1| ≤ 79 degrees; and 0 degrees ≤ |θ2| ≤ 82 degrees.

2. The imaging lens according to claim 1, characterized in that, The surfaces of the first nanostructure layer and the second nanostructure layer have multiple pores.

3. The imaging lens according to claim 2, characterized in that, The first nanostructure layer is also disposed on the surface where the first micrometer structure is disposed, which is between the first object side and the first image side. The first nanostructure layer covers the first micrometer structure and is in contact with the first micrometer structure entity.

4. The imaging lens according to claim 3, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It satisfies the following conditions: R 7590 ≤ 0.65%。 5. The imaging lens according to claim 4, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It satisfies the following conditions: R 7590 ≤ 0.5%。 6. The imaging lens according to claim 4, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 370 nm to 400 nm. 3740 It satisfies the following conditions: R 3740 ≤ 0.75%。 7. The imaging lens according to claim 4, characterized in that, The surface of one of the two objects, the first object side and the first image side, on which the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 400 nm to 700 nm. 4070 It satisfies the following conditions: R 4070 ≤ 0.5%。 8. The imaging lens according to claim 2, characterized in that, The thickness of the first inner annular surface along the optical axis is T, and it satisfies the following condition: 2 micrometers ≤ T ≤ 88 micrometers.

9. The imaging lens according to claim 2, characterized in that, The lens barrel further includes a second micrometer structure, which is at least disposed on the second inner annular surface. The second micrometer structure is covered by the second nanostructure layer, and the second micrometer structure is in solid contact with the second nanostructure layer. The second microstructure has multiple protrusions, and the average height of the second microstructure is greater than or equal to 0.32 micrometers and less than or equal to 22 micrometers.

10. The imaging lens according to claim 9, characterized in that, The second nanostructure layer and the second microstructure are also disposed on the side of the second object, the second nanostructure layer covers the second microstructure on the side of the second object, and the second nanostructure layer is in contact with the second microstructure on the side of the second object.

11. An imaging lens having an optical axis, characterized in that, The imaging lens includes: A lens, wherein the optical axis passes through the lens; A light-blocking sheet, comprising: The first object's side view; A first image side surface, wherein the first image side surface is disposed opposite to the first object side surface; A first inner ring surface connects the first object side surface and the first image side surface, wherein the first inner ring surface surrounds the optical axis and defines a first light-transmitting hole; A first micrometer structure is disposed at least on one of the first object side and the first image side, wherein the first micrometer structure has a plurality of protrusions and the average height of the first micrometer structure is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers; as well as A first nanostructure layer is disposed at least on the first inner ring surface; A spacer element, wherein the spacer element and the light-shielding sheet are disposed along the optical axis, and the spacer element comprises: The second side of the object; A second image side surface, wherein the second image side surface is disposed opposite to the second object side surface; A second inner annular surface connects the second object side surface and the second image side surface, wherein the second inner annular surface surrounds the optical axis and defines a second light-transmitting aperture; as well as A second nanostructure layer is disposed at least on the second inner annular surface; as well as A lens barrel that houses the lens, the light-shielding plate, and the spacer element; The light-shielding sheet is made of plastic. When viewed in cross-section of the first micron structure, the protrusions of the first micron structure are arc-shaped. The first nanostructure layer and the second nanostructure layer have multiple ridge-like protrusions extending in a non-directional direction, and the average height of the first nanostructure layer and the second nanostructure layer is greater than or equal to 98 nanometers and less than or equal to 350 nanometers. Wherein, the shortest distance along the optical axis between the first nanostructure layer and the second nanostructure layer of the spacer element is Dss, the distance along the optical axis between the object side and the image side of the lens barrel is Doi, the angle between the first inner ring surface and the optical axis is θ1, and the angle between the second inner ring surface and the optical axis is θ2, which satisfies the following conditions: 0 ≤ Dss / Doi ≤ 0.62; 0 degrees ≤ |θ1| ≤ 79 degrees; and 0 degrees ≤ |θ2| ≤ 82 degrees.

12. The imaging lens according to claim 11, characterized in that, The surfaces of the first nanostructure layer and the second nanostructure layer have multiple pores.

13. The imaging lens according to claim 12, characterized in that, The first nanostructure layer is also disposed on the surface where the first micrometer structure is disposed, which is between the first object side and the first image side. The first nanostructure layer covers the first micrometer structure and is in contact with the first micrometer structure entity.

14. The imaging lens according to claim 13, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It satisfies the following conditions: R 7590 ≤ 0.65%。 15. The imaging lens according to claim 14, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It satisfies the following conditions: R 7590 ≤ 0.5%。 16. The imaging lens according to claim 14, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 370 nm to 400 nm. 3740 It satisfies the following conditions: R 3740 ≤ 0.75%。 17. The imaging lens according to claim 14, characterized in that, The surface of one of the two objects, the first object side and the first image side, on which the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 400 nm to 700 nm. 4070 It satisfies the following conditions: R 4070 ≤ 0.5%。 18. The imaging lens according to claim 12, characterized in that, The spacer element further includes a second micrometer structure, the second micrometer structure being disposed at least on the second inner annular surface, the second micrometer structure being covered by the second nanostructure layer, and the second micrometer structure being in solid contact with the second nanostructure layer; The second micrometer structure has multiple protrusions, which are periodically arranged around the optical axis, and the average height of the second micrometer structure is greater than or equal to 3 micrometers and less than or equal to 182 micrometers.

19. An imaging lens having an optical axis, characterized in that, The imaging lens includes: At least one reflective element having at least one reflective surface, wherein the at least one reflective surface is used to deflect the direction of light transmission; A lens, wherein the optical axis passes through the lens; A light-blocking sheet, comprising: The first object's side view; A first image side surface, wherein the first image side surface is disposed opposite to the first object side surface; A first inner ring surface connects the first object side surface and the first image side surface, wherein the first inner ring surface surrounds the optical axis and defines a first light-transmitting hole; A first micrometer structure is disposed at least on one of the first object side and the first image side, wherein the first micrometer structure has a plurality of protrusions and the average height of the first micrometer structure is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers; as well as A first nanostructure layer is disposed at least on the first inner ring surface; as well as A lens barrel that houses the lens and the light-shielding plate; The light-shielding sheet is made of plastic. When viewed in cross-section of the first micron structure, the protrusions of the first micron structure are arc-shaped. The first nanostructure layer has multiple ridge-like protrusions extending in a non-directional direction, and the average height of the first nanostructure layer is greater than or equal to 98 nanometers and less than or equal to 350 nanometers. Wherein, the angle between the first inner annular surface and the optical axis is θ1, which satisfies the following condition: 0 degrees ≤ |θ1| ≤ 79 degrees.

20. The imaging lens according to claim 19, characterized in that, The number of the at least one reflective surface is at least two.

21. The imaging lens according to claim 19, characterized in that, The number of the at least one reflective element is at least two.

22. The imaging lens according to claim 19, characterized in that, The surface of the first nanostructure layer has multiple pores.

23. The imaging lens according to claim 22, characterized in that, The first nanostructure layer is also disposed on the surface where the first micrometer structure is disposed, which is between the first object side and the first image side. The first nanostructure layer covers the first micrometer structure and is in contact with the first micrometer structure entity.

24. The imaging lens according to claim 23, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It satisfies the following conditions: R 7590 ≤ 0.65%。 25. The imaging lens according to claim 24, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It satisfies the following conditions: R 7590 ≤ 0.5%。 26. The imaging lens according to claim 24, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 370 nm to 400 nm. 3740 It satisfies the following conditions: R 3740 ≤ 0.75%。 27. The imaging lens according to claim 24, characterized in that, The surface of one of the two objects, the first object side and the first image side, on which the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 400 nm to 700 nm. 4070 It satisfies the following conditions: R 4070 ≤ 0.5%。 28. A light-blocking sheet having an optical axis, characterized in that, The light-shielding sheet comprises: The first object's side view; A first image side surface, wherein the first image side surface is disposed opposite to the first object side surface; A first inner ring surface connects the first object side surface and the first image side surface, wherein the first inner ring surface surrounds the optical axis and defines a first light-transmitting hole; A first micrometer structure is disposed at least on one of the first object side and the first image side, wherein the first micrometer structure has a plurality of protrusions and the average height of the first micrometer structure is greater than or equal to 0.25 micrometers and less than or equal to 19 micrometers; as well as A first nanostructure layer is disposed at least on the first inner ring surface; The light-shielding sheet is made of plastic. When viewed in cross-section of the first micron structure, the protrusions of the first micron structure are arc-shaped. The first nanostructure layer has multiple ridge-like protrusions extending in a non-directional direction, and the average height of the first nanostructure layer is greater than or equal to 98 nanometers and less than or equal to 350 nanometers. Wherein, the angle between the first inner annular surface and the optical axis is θ1, and the thickness of the first inner annular surface along the direction of the optical axis is T, which satisfies the following conditions: 0 degrees ≤ |θ1| ≤ 79 degrees; and 2 micrometers ≤ T ≤ 88 micrometers.

29. The light-shielding sheet according to claim 28, characterized in that, The surface of the first nanostructure layer has multiple pores.

30. The light-shielding sheet according to claim 29, characterized in that, The first nanostructure layer is also disposed on the surface where the first micrometer structure is disposed between the first object side and the first image side, the first nanostructure layer covers the first micrometer structure, and the first nanostructure layer is in contact with the first micrometer structure entity.

31. The light-shielding sheet according to claim 30, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It satisfies the following conditions: R 7590 ≤ 0.65%。 32. The light-shielding sheet according to claim 31, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 750 nm to 900 nm. 7590 It satisfies the following conditions: R 7590 ≤ 0.5%。 33. The light-shielding sheet according to claim 31, characterized in that, The surface of one of the two objects, the first object side and the first image side, where the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 370 nm to 400 nm. 3740 It satisfies the following conditions: R 3740 ≤ 0.75%。 34. The light-shielding sheet according to claim 31, characterized in that, The surface of one of the two objects, the first object side and the first image side, on which the first nanostructure layer is disposed, has an average reflectance of R for light with wavelengths from 400 nm to 700 nm. 4070 It satisfies the following conditions: R 4070 ≤ 0.5%。 35. An electronic device, characterized in that, It includes an imaging lens according to claim 1, 11 or 19 or a light shield according to claim 28.

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