Imaging optical lens, image capturing device and electronic device

Abstract

This disclosure provides an imaging optical lens, an image capturing device, and an electronic device. The imaging optical lens includes at least one optical lens, which includes an anti-reflective coating. The anti-reflective coating includes a high- and low-refractive-index film and a graded-refractive-index film, with the high- and low-refractive-index film disposed between the optical lens and the graded-refractive-index film. The high- and low-refractive-index film includes at least one high-refractive-index layer and at least one low-refractive-index layer, which are alternately stacked. The graded-refractive-index film includes multiple holes, with the holes farther from the optical lens being relatively larger than those closer to the optical lens. By depositing a uniform and dense anti-reflective coating on the surface of the imaging optical lens, the optical lens exhibits significant oxidation resistance, contributing to a wide-wavelength range of anti-reflective effects to meet the requirements of imaging optical lenses with high image quality.

Description

Technical Field

[0001] This disclosure relates to an imaging optical lens and an image capturing device, and more particularly to an imaging optical lens and an image capturing device that are used in electronic devices and have good anti-reflective properties. Background Technology

[0002] Traditional anti-reflective coating (ARC) technology is insufficient in reducing reflectivity across a wide wavelength range, and strong light in the long wavelength region leads to image quality degradation. When the incident angle increases, the increased internal light path length results in insufficient optical path difference between coating layers to achieve destructive interference conditions, thus failing to solve the severe reflection problem caused by light incident on the lens surface at large angles. Regarding the properties of glass materials, lower dispersion provides a clearer image. While this significantly helps with dispersion correction in large-aperture photographic lenses, its resistance to oxidation from atmospheric water and oxygen is relatively poor. Traditional anti-reflective coating technology mainly relies on the solidification or deposition of coating materials on the contact surface. The uniformity and density of the coating are directly related to the particle size of the material and the flatness of the contact surface. Therefore, traditional anti-reflective coating technology is often limited by optical lenses with drastic surface shape changes, making it unable to meet the requirements of high-end optical systems for reducing lens reflectivity. Therefore, in high-end optical systems with greater freedom of surface shape changes, developing coating technologies with excellent substrate protection and good anti-reflective effects has become an important goal. Summary of the Invention

[0003] The imaging optical lens, image capturing device, and electronic device disclosed herein, by depositing a uniform and dense anti-reflective film on the surface of the imaging optical lens, enable optical lenses with insufficient water and acid resistance to have significant anti-oxidation capabilities, which helps to achieve anti-reflection effects over a wide wavelength range, thereby meeting the requirements of imaging optical lenses with high imaging quality.

[0004] According to one embodiment of the present disclosure, an imaging optical lens is provided, comprising at least one optical lens. The optical lens is made of glass and includes an anti-reflective coating located on at least one surface of the optical lens. The anti-reflective coating includes a high- and low-refractive-index film and a graded-refractive-index film, with the high- and low-refractive-index film disposed between the optical lens and the graded-refractive-index film. The high- and low-refractive-index film includes at least one high-refractive-index film layer and at least one low-refractive-index film layer, which are alternately stacked. The low-refractive-index film layer contacts the optical lens, and the main material of the low-refractive-index film layer is aluminum oxide. The graded-refractive-index film includes a plurality of holes, with the holes farther from the optical lens being relatively larger than those closer to the optical lens, and the main material of the graded-refractive-index film is a metal oxide. The total thickness of the anti-reflective film located at the center of the optical lens is Tc, and the total thickness of the anti-reflective film located at the periphery of the optical lens is Tp, which satisfies the following condition: 0% < |Tc-Tp| / Tc ≤ 15.0%.

[0005] According to the imaging optical lens of the aforementioned embodiment, the total thickness of the anti-reflective coating is tTK, which can satisfy the following conditions: 200nm≤tTK≤800nm.

[0006] According to the imaging optical lens of the aforementioned embodiment, the refractive index of the high refractive index film is NH, which can satisfy the following condition: 2.00≤NH.

[0007] According to the imaging optical lens of the aforementioned embodiment, the refractive index of the low refractive index film is NL, which can satisfy the following condition: NL≤1.80.

[0008] According to the imaging optical lens of the aforementioned embodiment, the total thickness of the high refractive index film is TNH, which can satisfy the following conditions: 1nm≤TNH≤60nm.

[0009] According to the imaging optical lens of the aforementioned embodiment, the total thickness of the low refractive index film is TNL, which can satisfy the following conditions: 1nm≤TNL≤300nm.

[0010] According to the imaging optical lens of the aforementioned embodiment, the thickness of the low refractive index film layer in contact with the optical lens is TL1, which can satisfy the following conditions: 10nm≤TL1≤100nm.

[0011] According to the imaging optical lens of the aforementioned embodiment, the thickness of the graded refractive index film is TNG, and the total thickness of the anti-reflection film is tTK, which can satisfy the following condition: 0.45≤TNG / tTK≤0.85.

[0012] In the imaging optical lens according to the aforementioned embodiments, the material of the gradient refractive index film can be aluminum oxide.

[0013] According to the imaging optical lens of the aforementioned embodiment, the total thickness of the anti-reflective coating located at the center of the optical lens is Tc, and the total thickness of the anti-reflective coating located at the periphery of the optical lens is Tp, which can satisfy the following condition: 0% < |Tc-Tp| / Tc ≤ 10.0%.

[0014] According to the imaging optical lens of the aforementioned embodiment, the horizontal displacement of the surface of the optical lens at the maximum effective diameter is SAG, and the total thickness of the anti-reflective coating is tTK, which can satisfy the following condition: 0≤|SAG| / tTK≤10.0.

[0015] According to the imaging optical lens of the aforementioned embodiment, the average reflectance of the optical lens at wavelengths from 400 nm to 1000 nm is R40100, which satisfies the following condition: 0% <R40100≤1.00%。

[0016] According to the imaging optical lens of the aforementioned embodiment, the average reflectance of the optical lens at wavelengths from 400 nm to 700 nm is R4070, which satisfies the following condition: 0%. <R4070≤1.00%。

[0017] According to the imaging optical lens of the aforementioned embodiment, the average reflectance of the optical lens at wavelengths from 700 nm to 1000 nm is R70100, which satisfies the following condition: 0% <R70100≤1.00%。

[0018] According to the imaging optical lens of the aforementioned embodiment, the dispersion coefficient of the optical lens is Vs, which can satisfy the following condition: 35.0≤Vs≤85.0.

[0019] According to the imaging optical lens of the aforementioned embodiment, the refractive index of the optical lens is Ns, which can satisfy the following condition: Ns≤1.85.

[0020] According to the imaging optical lens of the aforementioned embodiment, the acid resistance of the optical lens is Da, and the dispersion coefficient of the optical lens is Vs, which can satisfy the following condition: 0.6≤Vs×Da / 10≤13.0.

[0021] According to the imaging optical lens of the aforementioned embodiment, the acid resistance of the optical lens is Da, and the refractive index of the optical lens is Ns, which can satisfy the following condition: 0.1≤Ns×Da≤4.5.

[0022] According to the imaging optical lens of the aforementioned embodiment, the water resistance of the optical lens is Dw, and the dispersion coefficient of the optical lens is Vs, which can satisfy the following condition: 0 <Vs×Dw≤10.0。

[0023] According to the imaging optical lens of the aforementioned embodiment, the water resistance of the optical lens is Dw, and the refractive index of the optical lens is Ns, which can satisfy the following condition: 0 <Ns×Dw×100≤50。

[0024] The imaging optical lens according to the foregoing embodiments may further include at least one optical element, the material of which may be glass, the optical element may include an anti-reflective film, the anti-reflective film of which may be located on at least one surface of the optical element, and the optical element may be a prism.

[0025] According to another aspect of this disclosure, an imaging device is provided, which includes an imaging optical lens as described above and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens.

[0026] According to another aspect of this disclosure, an electronic device is provided, which is a vehicle device, and the electronic device includes an image capturing device as described above.

[0027] According to another embodiment of the present disclosure, an imaging optical lens is provided, comprising at least two optical lenses and at least one optical element. At least one of the at least two optical lenses includes a long-wavelength absorbing material, which is made of a plastic material, and the long-wavelength absorbing material is uniformly mixed in the plastic material. At least one of the at least two optical lenses includes a long-wavelength filtering coating located on the object-side or image-side surface of the optical lens. The long-wavelength filtering coating includes a plurality of high-refractive-index layers and a plurality of low-refractive-index layers, with the high-refractive-index layers and low-refractive-index layers of the long-wavelength filtering coating alternately stacked. The optical element is made of glass and includes an anti-reflective coating located on at least one surface of the optical element, which is a flat glass plate. The anti-reflective coating of the optical element includes a high-low refractive-index film and a graded-refractive-index film, with the high-low refractive-index film disposed between the optical element and the graded-refractive-index film. The high-low refractive index film comprises at least one high-refractive index layer and at least one low-refractive index layer, with the high-refractive index layer and the low-refractive index layer of the high-low refractive index film alternately stacked. The low-refractive index layer of the high-low refractive index film contacts the optical element, and the main material of the low-refractive index layer is aluminum oxide. The graded refractive index film comprises multiple holes, with the holes farther from the optical element being relatively larger than those closer to the optical element, and the main material of the graded refractive index film is a metal oxide. The total thickness of the anti-reflective film located at the center of the optical element is Tc, and the total thickness of the anti-reflective film located around the periphery of the optical element is Tp, satisfying the following condition: 0% < |Tc-Tp| / Tc ≤ 15.0%.

[0028] When |Tc-Tp| / Tc meets the above conditions, the uniformity of the total film thickness of the anti-reflective film can be maintained. This not only effectively solves the defect of reflected light caused by the inability to uniformly coat the film when the peripheral surface shape changes drastically, but also helps to improve the anti-reflective effect of light incident on the surface at large angles. Attached Figure Description

[0029] To make the above and other objects, features, advantages and embodiments of this disclosure more apparent and understandable, the accompanying drawings are described below:

[0030] Figure 1 This is a schematic diagram of an imaging device according to a first embodiment of the present disclosure;

[0031] Figure 2 The graph shows the relationship between reflectivity and wavelength for the first comparative example.

[0032] Figure 3 The graph shows the relationship between reflectivity and wavelength for the third comparative example.

[0033] Figure 4 This is a graph showing the relationship between reflectivity and wavelength in the first embodiment;

[0034] Figure 5 This is a graph showing the relationship between reflectivity and wavelength in the second embodiment;

[0035] Figure 6 This is a graph showing the relationship between reflectivity and wavelength in the third embodiment;

[0036] Figure 7A This is a surface quality diagram of the optical lens substrate of the second comparative example.

[0037] Figure 7B This is a surface quality diagram of the optical lens substrate in the first embodiment;

[0038] Figure 8 A perspective view of an image-capturing device according to the fourteenth embodiment of this disclosure is shown;

[0039] Figure 9A A schematic diagram showing one side of an electronic device according to the fifteenth embodiment of this disclosure;

[0040] Figure 9B Drawing according to Figure 9A A schematic diagram of the other side of the electronic device;

[0041] Figure 9C Drawing according to Figure 9A A schematic diagram of the electronic device in the middle;

[0042] Figure 10 A schematic diagram showing one side of an electronic device according to the sixteenth embodiment of this disclosure;

[0043] Figure 11 A schematic diagram showing one side of an electronic device according to the seventeenth embodiment of this disclosure;

[0044] Figure 12A A schematic diagram showing one side of an electronic device according to the eighteenth embodiment of this disclosure;

[0045] Figure 12B Drawing according to Figure 12A A schematic diagram of the other side of the electronic device;

[0046] Figure 13A A top view of a vehicle tool according to the nineteenth embodiment of this disclosure is shown;

[0047] Figure 13B Drawing according to Figure 13A A partially enlarged schematic diagram of the vehicle tools; and

[0048] Figure 13C Drawing according to Figure 13A Another diagram of the vehicle tools.

[0049] [Symbol Explanation]

[0050] 200, 300, 400, 500: Electronic devices

[0051] 1,100,110,120,130,140,310,320,330,410,420,430,440,450,460,470,480,490,510,520,530,540: Image capturing device

[0052] 101: Imaging Lens

[0053] 102: Drive unit assembly

[0054] 103: Electronic photosensitive element

[0055] 104: Image Stabilization Module

[0056] 201, 301, 401: Flash module

[0057] 202: Focusing Assist Module

[0058] 203: Image Signal Processor

[0059] 204, 504: User Interface

[0060] 205: Image Software Processor

[0061] 206: Subject

[0062] 600: Vehicle Tools

[0063] 610: Camera Module

[0064] S1, S2, S3, S4: External space information

[0065] ST: Aperture

[0066] IMG: Imaging Surface

[0067] IS: Electronic photosensitive element

[0068] Tc: Total thickness of the anti-reflective coating located at the center of the optical lens.

[0069] Tp: Total thickness of the anti-reflective coating located around the optical lens.

[0070] tTK: Total thickness of the antireflective coating

[0071] TNG: Thickness of graded refractive index film

[0072] TNH: Total thickness of the high refractive index film.

[0073] TNL: Total thickness of low-refractive-index films

[0074] TL1: Thickness of the low-refractive-index coating in contact with the optical lens

[0075] TL2: Thickness of the second film layer

[0076] TL3: Thickness of the third film layer

[0077] TL4: Thickness of the fourth film layer

[0078] TL5: Thickness of the fifth film layer

[0079] TD: Distance from the object-side surface of the first optical lens to the image-side surface of the last optical lens

[0080] NH: Refractive index of high refractive index film

[0081] NL: Refractive index of low-refractive-index film

[0082] SAG: Horizontal displacement of the surface of an optical lens at its maximum effective diameter.

[0083] SD: Effective diameter of the surface of an optical lens

[0084] SDmax: The maximum effective diameter across all optical lens surfaces.

[0085] R4060: Average reflectance of optical lenses at wavelengths from 400nm to 600nm.

[0086] R4070: Average reflectance of optical lenses at wavelengths from 400nm to 700nm.

[0087] R40100: Average reflectance of optical lenses at wavelengths from 400nm to 1000nm

[0088] R5060: Average reflectance of optical lenses at wavelengths from 500nm to 600nm.

[0089] R5070: Average reflectance of optical lenses at wavelengths from 500nm to 700nm

[0090] R70100: Average reflectance of optical lenses at wavelengths from 700nm to 1000nm

[0091] R80100: Average reflectance of optical lenses at wavelengths from 800nm ​​to 1000nm

[0092] R90100: Average reflectance of optical lenses at wavelengths from 900nm to 1000nm

[0093] RW: Water resistance rating of optical lenses

[0094] RA: Acid resistance rating of optical lenses

[0095] Vs: Dispersion coefficient of optical lenses

[0096] Ns: Refractive index of the optical lens

[0097] Da: Acid resistance of optical lenses

[0098] Dw: Water resistance of optical lenses

[0099] FOV: The full field of view of an imaging optical lens

[0100] CT: Thickness of an optical lens along its optical axis

[0101] E1, E2, E3, E4, E5, E6, E7, E8, E9: Optical lenses

[0102] C1, C2: Anti-reflective coating

[0103] FL1, FL2: Filter elements Detailed Implementation

[0104] One embodiment of this disclosure provides an imaging optical lens comprising at least one optical lens. The optical lens is made of glass and includes an anti-reflective coating located on at least one surface of the optical lens. The anti-reflective coating comprises a high- and low-refractive-index film and a graded-refractive-index film, with the high- and low-refractive-index film disposed between the optical lens and the graded-refractive-index film. The high- and low-refractive-index film comprises at least one high-refractive-index film layer and at least one low-refractive-index film layer, which are alternately stacked. The low-refractive-index film layer contacts the optical lens, and the main material of the low-refractive-index film layer is aluminum oxide. The graded-refractive-index film includes a plurality of holes, with the holes farther from the optical lens being relatively larger than those closer to the optical lens, and the main material of the graded-refractive-index film is a metal oxide. The total thickness of the anti-reflective film located at the center of the optical lens is Tc, and the total thickness of the anti-reflective film located at the periphery of the optical lens is Tp, which satisfies the following condition: 0% < |Tc-Tp| / Tc ≤ 15.0%.

[0105] This disclosure describes the application of multilayer coating technology to the surface of imaging optical lenses. By alternately stacking multiple high-refractive-index layers and low-refractive-index layers, light is reduced by destructive interference at the film surface. Furthermore, the gradually varying hole structure and gradient refractive index of the graded-index film effectively provide anti-reflection effects across a wide wavelength range and solves the problem of severe reflection at large angles of incidence. This disclosure creates a uniform and dense anti-reflection film on the surface of the imaging optical lens, significantly enhancing the oxidation resistance of optical lenses with insufficient water and acid resistance, thus contributing to a wide-wavelength anti-reflection effect and meeting the requirements of imaging optical lenses demanding high image quality.

[0106] The total thickness of the anti-reflective coating, tTK, can satisfy the following condition: 200nm ≤ tTK ≤ 800nm. Controlling the total thickness of the anti-reflective coating helps maintain the overall integrity of the coating and achieves the best anti-reflective effect. Furthermore, it can satisfy the following conditions: 200nm ≤ tTK ≤ 700nm; 200nm ≤ tTK ≤ 600nm; 200nm ≤ tTK ≤ 500nm; or 300nm ≤ tTK ≤ 400nm.

[0107] The refractive index of the high-refractive-index film is NH, which can satisfy the following condition: 2.00≤NH. By controlling the refractive index of the high-refractive-index film, a larger refractive index difference can be provided to improve the anti-reflection effect. Furthermore, the following conditions can be satisfied: 2.05≤NH; 2.10≤NH; 2.20≤NH; or 2.30≤NH≤2.40.

[0108] The refractive index of the low-refractive-index film is NL, which can satisfy the following condition: NL≤1.80. By controlling the refractive index of the low-refractive-index film, the anti-reflection effect can be effectively improved. Furthermore, it can satisfy the following conditions: 1.40≤NL≤1.80; 1.40≤NL≤1.70; 1.45≤NL≤1.70; or 1.45≤NL≤1.68.

[0109] The total thickness of the high-refractive-index film is TNH, which can satisfy the following condition: 1 nm ≤ TNH ≤ 60 nm. By controlling the high-refractive-index film to achieve a specific thickness, reflected light can easily produce destructive interference phenomena on the surfaces of the spaced film layers, which helps to improve the anti-reflection effect. Furthermore, the following conditions can be satisfied: 1 nm ≤ TNH ≤ 50 nm; 1 nm ≤ TNH ≤ 40 nm; 1 nm ≤ TNH ≤ 36 nm; or 1 nm ≤ TNH ≤ 30 nm.

[0110] The total thickness of the low-refractive-index film is TNL, which can satisfy the following condition: 1nm ≤ TNL ≤ 300nm. By controlling the low-refractive-index film to achieve a specific thickness, reflected light can easily produce destructive interference phenomena on the surfaces of the spaced film layers, which helps to improve the anti-reflection effect. Furthermore, the following conditions can be satisfied: 20nm ≤ TNL ≤ 240nm; 30nm ≤ TNL ≤ 200nm; 40nm ≤ TNL ≤ 170nm; or 50nm ≤ TNL ≤ 140nm.

[0111] The thickness of the low-refractive-index coating layer in contact with the optical lens is TL1, which can satisfy the following conditions: 10nm ≤ TL1 ≤ 100nm. By controlling the thickness of the coating layer in contact with the optical lens, the glass surface is protected, and the coating time and cost are effectively reduced. Furthermore, the following conditions can be satisfied: 1nm ≤ TL1 ≤ 150nm; 10nm ≤ TL1 ≤ 120nm; 15nm ≤ TL1 ≤ 100nm; 20nm ≤ TL1 ≤ 85nm; or 25nm ≤ TL1 ≤ 70nm. In addition, the high and low refractive index coating layers are sequentially arranged from the optical lens outwards as the first layer, second layer, third layer, fourth layer, and so on. Therefore, TL1 can also be referred to as the thickness of the first layer.

[0112] The thickness of the graded refractive index film is TNG, and the total thickness of the antireflective film is tTK, which can satisfy the following condition: 0.45≤TNG / tTK≤0.85. By controlling the thickness of the graded refractive index film, the optimal aperture structure is maintained, effectively achieving the optimal graded refractive index design to improve the antireflective effect of light incident at large angles and avoid reducing the antireflective effect due to insufficient film thickness. Furthermore, the following conditions can be satisfied: 0.50≤TNG / tTK≤0.80; 0.50≤TNG / tTK≤0.75; 0.60≤TNG / tTK≤0.75; or 0.60≤TNG / tTK≤0.70.

[0113] The material of the gradient refractive index film can be aluminum oxide. By selecting the material of the gradient refractive index film suitable for the pore-forming process, the surface hole distribution is effectively improved and the hole gap is increased, presenting the best sponge hole structure and pore density.

[0114] The total thickness of the antireflection film at the center of the optical lens is Tc, and the total thickness of the antireflection film at the periphery of the optical lens is Tp, which satisfies the following conditions: 0% < |Tc - Tp| / Tc ≤ 15.0%. By maintaining the uniformity of the total film thickness of the antireflection film, not only the defect of reflected light caused by uneven coating when the peripheral surface shape changes violently is effectively solved, but also the antireflection effect of the light incident on the surface at a large angle is improved. Furthermore, the following conditions can be satisfied: 0% < |Tc - Tp| / Tc ≤ 10.0%; 0% < |Tc - Tp| / Tc ≤ 5.0%; 0% < |Tc - Tp| / Tc ≤ 1.0%; or 0% < |Tc - Tp| / Tc ≤ 0.4%.

[0115] The horizontal displacement at the maximum effective diameter of the surface of the optical lens is SAG, and the total film thickness of the antireflection film is tTK, which can satisfy the following conditions: 0 ≤ |SAG| / tTK ≤ 10.0. By controlling the coating and surface shape conditions, when coating with atomic layer deposition technology, it is not restricted by the parameters of optical lenses with large surface curvature changes. Furthermore, the following conditions can be satisfied: 0 ≤ |SAG| / tTK ≤ 8.0; 0 ≤ |SAG| / tTK ≤ 6.0; 0.1 ≤ |SAG| / tTK ≤ 6.0; or 0.1 ≤ |SAG| / tTK ≤ 5.0.

[0116] The average reflectance of the optical lens at wavelengths from 400 nm to 1000 nm is R40100, which can satisfy the following conditions: 0% < R40100 ≤ 1.00%. Thereby, the reflection effect of light in a wide wavelength range on the surface can be effectively controlled, which helps to increase the transmittance in a wide wavelength range. Furthermore, the following conditions can be satisfied: 0% < R40100 ≤ 0.80%; 0% < R40100 ≤ 0.50%; 0% < R40100 ≤ 0.25%; or 0% < R40100 ≤ 0.15%.

[0117] The average reflectance of the optical lens at wavelengths from 400 nm to 700 nm is R4070, which can satisfy the following conditions: 0% < R4070 ≤ 1.00%. Thereby, the reflection effect of light in the visible light band on the surface can be effectively controlled, which helps to increase the transmittance in the blue, green, and red visible light regions. Furthermore, the following conditions can be satisfied: 0% < R4070 ≤ 0.50%; 0% < R4070 ≤ 0.25%; 0% < R4070 ≤ 0.10%; or 0% < R4070 ≤ 0.05%.

[0118] The average reflectance of the optical lens at wavelengths from 700 nm to 1000 nm is R70100, which can meet the following conditions: 0% < R70100 ≤ 1.00%. Thereby, the reflection effect of light in the infrared light band on the surface can be effectively controlled, which helps to increase the transmittance in the long wavelength range. Furthermore, the following conditions can be met: 0% < R70100 ≤ 0.80%; 0% < R70100 ≤ 0.60%; 0% < R70100 ≤ 0.45%; or 0% < R70100 ≤ 0.25%.

[0119] The dispersion coefficient of the optical lens is Vs, which can meet the following conditions: 35.0 ≤ Vs ≤ 85.0. By selecting appropriate glass materials, it helps to significantly improve the antioxidant ability of the optical lens and provide the best protection effect. Furthermore, the following conditions can be met: 35.0 ≤ Vs ≤ 71.0; 35.0 ≤ Vs ≤ 60.0; 50.0 ≤ Vs ≤ 71.0; or 35.0 ≤ Vs ≤ 50.0.

[0120] The refractive index of the optical lens is Ns, which can meet the following conditions: Ns ≤ 1.85. By controlling the refractive index of the optical lens material, it helps the surface coating to achieve the best antireflection effect. Furthermore, the following conditions can be met: 1.45 ≤ Ns ≤ 1.85; 1.50 ≤ Ns ≤ 1.85; 1.60 ≤ Ns ≤ 1.85; or 1.70 ≤ Ns ≤ 1.85.

[0121] The acid resistance of the optical lens is Da, and the dispersion coefficient of the optical lens is Vs, which can meet the following conditions: 0.6 ≤ Vs × Da / 10 ≤ 13.0. By configuring the dispersion coefficient of the optical lens, it helps to exert the antioxidant protection effect of the film layer. Furthermore, the following conditions can be met: 0.6 ≤ Vs × Da / 10 ≤ 10.0; 0.85 ≤ Vs × Da / 10 ≤ 8.5; 3.0 ≤ Vs × Da / 10 ≤ 13.0; or 0.9 ≤ Vs × Da / 10 ≤ 3.5.

[0122] The acid resistance of the optical lens is Da, and the refractive index of the optical lens is Ns, which can meet the following conditions: 0.1 ≤ Ns × Da ≤ 4.5. By configuring the refractive index of the optical lens, it helps to exert the antioxidant protection effect of the film layer. Furthermore, the following conditions can be met: 0.2 ≤ Ns × Da ≤ 4.1; 0.3 ≤ Ns × Da ≤ 4.0; 0.3 ≤ Ns × Da ≤ 2.5; or 0.3 ≤ Ns × Da ≤ 1.2.

[0123] The water resistance of the optical lens is Dw, and the dispersion coefficient of the optical lens is Vs, which can satisfy the following conditions: 0 < Vs × Dw ≤ 10.0. By configuring the dispersion coefficient of the optical lens, it helps to exert the antioxidant protection effect of the film layer. Furthermore, the following conditions can be satisfied: 0 < Vs × Dw ≤ 7.5; 0 < Vs × Dw ≤ 6.0; 0 < Vs × Dw ≤ 5.0; or 0 < Vs × Dw ≤ 3.0.

[0124] The water resistance of the optical lens is Dw, and the refractive index of the optical lens is Ns, which can satisfy the following conditions: 0 < Ns × Dw × 100 ≤ 50. By configuring the refractive index of the optical lens, it helps to exert the antioxidant protection effect of the film layer. Furthermore, the following conditions can be satisfied: 0 < Ns × Dw × 100 ≤ 40; 0 < Ns × Dw × 100 ≤ 30; 0 < Ns × Dw × 100 ≤ 25; or 0 < Ns × Dw × 100 ≤ 17.

[0125] The aforementioned imaging optical lens may further include at least one optical element. The material of the optical element may be glass. The optical element may include an anti-reflection film. The anti-reflection film of the optical element may be located on at least one surface of the optical element, and the optical element may be a prism. By configuring the anti-reflection film, the loss of light penetrating the prism is effectively reduced.

[0126] Another embodiment of an aspect of the present disclosure provides an imaging optical lens, which includes at least two optical lenses and at least one optical element. At least one of the at least two optical lenses includes a long-wavelength absorbing material. The optical lens including the long-wavelength absorbing material is made of a plastic material, and the long-wavelength absorbing material is uniformly mixed in the plastic material. At least one of the at least two optical lenses includes a long-wavelength filtering coating. The long-wavelength filtering coating is located on the object-side surface or the image-side surface of the optical lens. The long-wavelength filtering coating includes a plurality of high-refractive-index film layers and a plurality of low-refractive-index film layers, and the high-refractive-index film layers and the low-refractive-index film layers of the long-wavelength filtering coating are alternately stacked. The material of the optical element is glass. The optical element includes an anti-reflection film. The anti-reflection film of the optical element is located on at least one surface of the optical element, and the optical element is a flat glass. The anti-reflection film of the optical element includes a high-low refractive-index film and a gradient refractive-index film. The high-low refractive-index film is disposed between the optical element and the gradient refractive-index film. The high-low refractive-index film includes at least one high-refractive-index film layer and at least one low-refractive-index film layer. The high-refractive-index film layers and the low-refractive-index film layers of the high-low refractive-index film are alternately stacked. The low-refractive-index film layer of the high-low refractive-index film contacts the optical element, and the main material of the low-refractive-index film layer of the high-low refractive-index film is aluminum oxide. The gradient refractive-index film includes a plurality of holes. The holes far from the optical element are relatively larger than the holes close to the optical element, and the main material of the gradient refractive-index film is metal oxide.

[0127] Therefore, the imaging optical lens provided in this disclosure has the function of reducing blue glass elements and infrared filtering elements, and effectively avoids petal-shaped stray light caused by reflection between the microlens surface and the protective glass surface.

[0128] Another aspect of this disclosure provides an imaging device comprising an imaging optical lens as described above and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens.

[0129] Another aspect of this disclosure provides an electronic device, which is a vehicle device or a mobile device, and the electronic device includes an image capturing device as described above.

[0130] The full field of view (FOV) of an imaging optical lens can meet the following conditions: 15 degrees ≤ FOV ≤ 180 degrees; 30 degrees ≤ FOV ≤ 150 degrees; or 35 degrees ≤ FOV ≤ 120 degrees.

[0131] In an imaging optical lens, the distance from the object-side surface of the first optical lens to the image-side surface of the last optical lens is TD, which can satisfy the following conditions: 5mm≤TD≤30mm; 5mm≤TD≤25mm; or 10mm≤TD≤20mm.

[0132] The horizontal displacement of the surface of an optical lens at its maximum effective diameter is called SAG, which can satisfy the following conditions: 0mm≤|SAG|≤8.00mm; 0mm≤|SAG|≤5.60mm; 0mm≤|SAG|≤3.60mm; 0.02mm≤|SAG|≤3.00mm; or 0.03mm≤|SAG|≤2.00mm.

[0133] The maximum effective diameter of all optical lens surfaces is SDmax, which can satisfy the following conditions: 1mm≤SDmax≤20mm; 1mm≤SDmax≤15mm; or 3mm≤SDmax≤13mm.

[0134] The thickness of the optical lens along the optical axis is CT, which can satisfy the following conditions: 0.5mm≤CT≤6.0mm; 0.5mm≤CT≤4.0mm; or 0.7mm≤CT≤2.0mm.

[0135] The water resistance rating of optical lenses is RW, which can meet the following conditions: 1≤RW≤6; 1≤RW≤5; or 1≤RW≤3.

[0136] The acid resistance rating of optical lenses is RA, which can meet the following conditions: 1≤RA≤6; 2≤RA≤6; or 3≤RA≤6.

[0137] For the high and low refractive index film, the film layers from the optical lens to the outside are, in sequence, the first film layer, the second film layer, the third film layer, the fourth film layer, and so on. The film thickness of the second film layer is TL2, which can satisfy the following conditions: 1nm ≤ TL2 ≤ 30nm; 1nm ≤ TL2 ≤ 25nm; 1nm ≤ TL2 ≤ 20nm; 1nm ≤ TL2 ≤ 18nm; or 1nm ≤ TL2 ≤ 15nm.

[0138] The film thickness of the third film layer is TL3, which can satisfy the following conditions: 1nm ≤ TL3 ≤ 150nm; 10nm ≤ TL3 ≤ 120nm; 15nm ≤ TL3 ≤ 100nm; 20nm ≤ TL3 ≤ 85nm; or 25nm ≤ TL3 ≤ 70nm.

[0139] The film thickness of the fourth film layer is TL4, which can satisfy the following conditions: 1nm ≤ TL4 ≤ 30nm; 1nm ≤ TL4 ≤ 25nm; 1nm ≤ TL4 ≤ 20nm; 1nm ≤ TL4 ≤ 18nm; or 1nm ≤ TL4 ≤ 15nm.

[0140] The film thickness of the gradient refractive index film is TNG, which can satisfy the following conditions: 90nm ≤ TNG ≤ 680nm; 100nm ≤ TNG ≤ 560nm; 100nm ≤ TNG ≤ 450nm; 120nm ≤ TNG ≤ 375nm; or 180nm ≤ TNG ≤ 280nm.

[0141] The average reflectance of the optical lens at wavelengths from 400nm to 600nm is R4060, which can satisfy the following conditions: 0% < R4060 ≤ 1.00%; 0% < R4060 ≤ 0.50%; 0% < R4060 ≤ 0.25%; 0% < R4060 ≤ 0.10%; or 0% < R4060 ≤ 0.05%.

[0142] The average reflectance of the optical lens at wavelengths from 500nm to 600nm is R5060, which can satisfy the following conditions: 0% < R5060 ≤ 1.00%; 0% < R5060 ≤ 0.50%; 0% < R5060 ≤ 0.25%; 0% < R5060 ≤ 0.10%; or 0% < R5060 ≤ 0.05%.

[0143] The average reflectance of the optical lens at wavelengths from 500nm to 700nm is R5070, which can satisfy the following conditions: 0% < R5070 ≤ 1.00%; 0% < R5070 ≤ 0.50%; 0% < R5070 ≤ 0.25%; 0% < R5070 ≤ 0.10%; or 0% < R5070 ≤ 0.05%.

[0144] The average reflectance of the optical lens at wavelengths from 800 nm to 1000 nm is R80100, which can meet the following conditions: 0% < R80100 ≤ 1.00%; 0% < R80100 ≤ 0.85%; 0% < R80100 ≤ 0.70%; 0% < R80100 ≤ 0.50%; or 0% < R80100 ≤ 0.35%.

[0145] The average reflectance of the optical lens at wavelengths from 900 nm to 1000 nm is R90100, which can meet the following conditions: 0% < R90100 ≤ 1.00%; 0% < R90100 ≤ 0.90%; 0% < R90100 ≤ 0.75%; 0% < R90100 ≤ 0.60%; or 0% < R90100 ≤ 0.50%.

[0146] The reflectance data of the present disclosure is measured for a single optical lens, and the reflectance data at incident angles of 0 degrees and 30 degrees is used as the comparison benchmark.

[0147] The main material of the present disclosure can represent that the proportion of the material in the whole is at least 50% or more by weight.

[0148] An imaging optical lens of the present disclosure includes at least two optical lenses and at least one optical element. The optical element can be located on the object side or the image side of the at least two optical lenses, or can be located between the at least two optical lenses.

[0149] The glass material of the present disclosure can be a high-alkali metal oxide-containing glass, a high-silica glass, or a special glass containing fluorides and phosphates, which can provide the best antioxidant effect; a glass material with good water and acid resistance can also be selected as the coating substrate to provide better antioxidant ability.

[0150] The method for testing the acid resistance value of the optical lens of the present disclosure is based on the test method of GB / T 171292. Powdered glass with a particle size of 425 μm to 600 μm is taken and a suitable proportion of its mass is added to a nitric acid aqueous solution with a volume molar concentration of 0.01 mol / L. The mass percentage (%) reduction is used as the acid resistance value of the optical lens and is divided into 6 grades.

[0151] The method for testing the water resistance value of the optical lens of the present disclosure is based on the test method of GB / T 171292. Powdered glass with a particle size of 425 μm to 600 μm is taken and a suitable proportion of its mass is added to 80 ml of pure water (pH 6.5 - 7.5) and boiled for 60 minutes. The mass percentage (%) reduction is used as the water resistance value of the optical lens and is divided into 6 grades.

[0152] The antireflective film disclosed herein is a multilayer thin film deposited on a glass surface using physical vapor deposition (PVD), such as evaporation deposition or sputtering deposition, or chemical vapor deposition (CVD), such as ultra-high vacuum chemical vapor deposition, microwave plasma-assisted chemical vapor deposition, plasma-enhanced chemical vapor deposition, or atomic layer deposition (ALD).

[0153] The anti-reflective coating disclosed herein can be applied to both sides, or it can be applied to only one suitable surface. By applying the technology disclosed herein to the surface of the optical lens with drastic changes in surface shape, the atomic layer deposition coating can be optimized to achieve a balance between cost and quality. By applying it to the surface of the most suitable optical lens material, the anti-reflective effect can be maximized.

[0154] The pore-forming process disclosed herein can effectively improve the surface pore distribution, increasing the gaps between pores, creating a sponge-like pore structure, or altering pore density. The pore-forming effect also changes with depth; for example, the outer side exposed to air has a larger pore structure, while the deeper inner side has a relatively smaller pore structure. These pores are composed of spaces between irregular nanofiber structures, allowing air to be trapped or connected within them. The outer and inner sides of the antireflective film, as shown in the cross-sectional view, represent the side furthest from the optical lens and the inner side closest to it. The pores (notches, gaps) distributed on the outer side are relatively larger than those on the inner side. This can also be explained by the sparser distribution density of the irregular branched structure on the outer side and the denser distribution density of the irregular branched structure on the inner side under the same plane. The pore-forming process can utilize plasma etching, chemical reaction etching, time-controlled crystallization particle size techniques, or high-temperature solution treatment, such as immersion in alcohols or water at temperatures above 50 degrees Celsius.

[0155] The main material of the gradient refractive index film disclosed herein is a metal oxide, which may be aluminum oxide, or aluminum nitride (AlN), aluminum hydroxide (Al(OH)3), or an aluminum-containing mixture.

[0156] The high and low refractive index films disclosed herein can also have an additional film layer added between the high refractive index film layer and the low refractive index film layer. Through the configuration design of the coating, the refractive index between the film layers can be varied by gradient, which also satisfies the difference between high and low refractive indices and achieves the purpose of reducing reflected light through destructive interference, effectively improving the anti-reflection effect in a wide wavelength range.

[0157] The gradient variation disclosed herein can be a polynomial function (including linear and curvilinear functions) or a Gaussian function of the relationship between refractive index and position, or a combination thereof.

[0158] The high-refractive-index or low-refractive-index film disclosed herein can be a film layer that contacts optical lenses or optical elements, and its main material is aluminum oxide, or it can be aluminum nitride, aluminum hydroxide or an aluminum-containing mixture; or it can be zinc oxide or magnesium oxide; or it can be a mixture of at least one of the above-mentioned aluminum oxide, zinc oxide, and magnesium oxide with other metal oxides. It has the characteristics of a dense structure, which can enhance the adhesion between the material and the optical lens, so as to avoid the coating from falling off, achieve the surface protection effect of the optical lens in the coating process, and effectively enhance the environmental weather resistance of the optical lens.

[0159] The high-refractive-index layer in the antireflective coating disclosed herein has a refractive index greater than 2.0, and the low-refractive-index layer has a refractive index less than 1.8. The materials of the high-refractive-index layer and the low-refractive-index layer (refractive index at a wavelength of 587.6 nm) can be, for example, magnesium fluoride (MgF2, 1.3777), silicon dioxide (SiO2, 1.4585), thorium fluoride (ThF4, 1.5125), silicon monoxide (SiO, 1.55), cerium fluoride (CeF3, 1.63), aluminum oxide (Al2O3, 1.7682), yttrium trioxide (Y2O3, 1.79), and hafnium dioxide (HfO2, 1.8935). Zinc oxide (ZnO, 1.9269%), scandium oxide (Sc2O3, 1.9872%), aluminum nitride (AlN, 2.0294%), silicon nitride (Si3N4, 2.0381%), tantalum pentoxide (Ta2O5, 2.1306%), zirconium dioxide (ZrO2, 2.1588%), zinc sulfide (ZnS, 2.2719%), niobium pentoxide (Nb2O5, 2.3403%), titanium dioxide (TiO2, 2.6142%), and titanium nitride (TiN, 3.1307%). Alternatively, it may be a mixture of magnesium fluoride and silicon dioxide (MgF2-SiO2), wherein the content ratio of each component may be, for example, [SiO2] > [MgF2].

[0160] The electronic device disclosed herein may also be an automotive device, a mobile device, an aviation device, or a surveillance device, etc.

[0161] This disclosure provides an electronic device that includes the aforementioned image capturing device. This improves image quality. Preferably, the aforementioned electronic device may further include a control unit, a display unit, a storage unit, a random access memory, or a combination thereof.

[0162] The imaging optical lenses disclosed herein can also be used in various electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, motion-sensing game consoles, dashcams, reversing cameras, wearable products, or drones.

[0163] The image-capturing device can capture an image through a non-circular opening on the outside of the electronic device.

[0164] Based on the above description, specific embodiments are described in detail below.

[0165] <First Embodiment>

[0166] Please refer to Figure 1 This is a schematic diagram of an image-capturing device 1 according to the first embodiment of the present disclosure. Figure 1 As can be seen, the imaging device 1 of the first embodiment includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens includes, in sequence from the object side to the image side of the optical path, an optical lens E1, an optical lens E2, an aperture ST, an optical lens E3, an optical lens E4, an optical lens E5, a filter element FL1, a filter element FL2, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG of the imaging optical lens. The imaging optical lens includes five optical lenses (E1, E2, E3, E4, E5). There are no other interposed optical lenses between the five optical lenses, and each pair of adjacent optical lenses has an air gap on the optical axis.

[0167] Each optical lens has an object-side surface and an image-side surface. Optical lens E1 is made of glass and includes anti-reflective coatings C1 and C2, which are located on the object-side surface and image-side surface of optical lens E1, respectively. Optical lenses E2, E3, E4, and E5 are made of plastic.

[0168] The field of view (FOV) of the imaging device 1 is 124 degrees. The distance from the object-side surface of optical lens E1 to the image-side surface of optical lens E5 is TD, which satisfies TD = 12 mm. The horizontal displacement of the object-side and image-side surfaces of optical lenses E1, E2, E3, E4, and E5 at their maximum effective diameter is SAG, which satisfies 0.98 mm ≤ |SAG| ≤ 1.59 mm. The maximum effective diameter among all optical lens surfaces is SDmax. In the first embodiment, SDmax is the effective diameter of the object-side surface of optical lens E1 and satisfies SDmax = 8 mm.

[0169] The thickness of optical lens E1 along the optical axis is CT, which satisfies the condition: CT = 1.0 mm. The refractive index of optical lens E1 is Ns, which satisfies the condition: Ns = 1.80. The dispersion coefficient of optical lens E1 is Vs, which satisfies the condition: Vs = 46.5. The water resistance rating of optical lens E1 is RW, which satisfies the condition: RW = 1. The water resistance of optical lens E1 is Dw, which satisfies the condition: Dw ≤ 0.05. The acid resistance rating of optical lens E1 is RA, which satisfies the condition: RA = 4. The acid resistance of optical lens E1 is Da, which satisfies the condition: 0.65 ≤ Da ≤ 1.20.

[0170] Optical lens E1 has a water resistance of Dw and a refractive index of Ns, satisfying the condition: Ns×Dw×100≤9. Optical lens E1 has an acid resistance of Da and a refractive index of Ns, satisfying the condition: 1.2≤Ns×Da≤2.2. Optical lens E1 has a water resistance of Dw and a dispersion coefficient of Vs, satisfying the condition: Vs×Dw≤2.3. Optical lens E1 has an acid resistance of Da and a dispersion coefficient of Vs, satisfying the condition: 3.0≤Vs×Da / 10≤5.6.

[0171] The horizontal displacement of the object-side surface of optical lens E1 at its maximum effective diameter is SAG, which satisfies the condition: |SAG| = 0.98 mm. The effective diameter of the object-side surface of optical lens E1 is SD, which satisfies the condition: |SD| × 2 = 8.08. The horizontal displacement of the image-side surface of optical lens E1 at its maximum effective diameter is SAG, which satisfies the condition: |SAG| = 1.59 mm. The effective diameter of the image-side surface of optical lens E1 is SD, which satisfies the condition: |SD| × 2 = 4.79.

[0172] The detailed parameters of the imaging device 1 of the first embodiment are listed in Table 1 below, wherein “1G4P” indicates that the imaging device 1 of the first embodiment includes one optical lens made of glass and four optical lenses made of plastic.

[0173]

[0174]

[0175] <Second Embodiment>

[0176] The imaging device of the second embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes seven optical lenses (E1, E2, E3, E4, E5, E6, E7), and there are no other interposed optical lenses between the seven optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0177] Each optical lens has an object-side surface and an image-side surface. Optical lens E1 is made of molded glass and includes an anti-reflective coating located on at least one of the object-side and image-side surfaces of optical lens E1. Optical lenses E2, E3, E4, E5, E6, and E7 are made of plastic.

[0178] The detailed parameters of the imaging device of the second embodiment are listed in Table 2 below. The "1MG6P" of the optical lens composition indicates that the imaging device of the second embodiment includes one optical lens made of molded glass material and six optical lenses made of plastic material. The other parameter definitions in Table 2 are the same as those of the first embodiment, and will not be repeated here.

[0179]

[0180]

[0181] <Third Embodiment>

[0182] The imaging device of the third embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed optical lenses between the six optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0183] Each optical lens has an object-side surface and an image-side surface. Optical lens E3 is made of glass and includes an anti-reflective coating located on at least one of the object-side and image-side surfaces of optical lens E3. Optical lenses E1, E2, E4, E5, and E6 are made of plastic.

[0184] The detailed parameters of the imaging device in the third embodiment are listed in Table 3 below. The parameter definitions in Table 3 are the same as those in the first embodiment, and will not be repeated here.

[0185]

[0186]

[0187] <Fourth Embodiment>

[0188] The imaging device of the fourth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes seven optical lenses (E1, E2, E3, E4, E5, E6, E7), and there are no other interposed optical lenses between the seven optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0189] Each optical lens has an object-side surface and an image-side surface. Optical lens E4 is made of glass and includes an anti-reflective coating located on at least one of the object-side and image-side surfaces of optical lens E4. Optical lenses E1, E2, E3, E5, E6, and E7 are made of plastic.

[0190] The detailed parameters of the imaging device in the fourth embodiment are listed in Table 4 below. The parameter definitions in Table 4 are the same as those in the first embodiment, and will not be repeated here.

[0191]

[0192] <Fifth Embodiment>

[0193] The imaging device of the fifth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lenses E1, E2, E3, E4, E5, E6, E7, E8, and E9, and an imaging surface. The electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes nine optical lenses (E1, E2, E3, E4, E5, E6, E7, E8, and E9). There are no other interposed optical lenses between the nine optical lenses, and each pair of adjacent optical lenses has an air gap on the optical axis.

[0194] Each optical lens has an object-side surface and an image-side surface. Optical lens E4 is made of glass and includes an anti-reflective coating located on at least one of the object-side and image-side surfaces of optical lens E4. Optical lenses E1, E2, E3, E5, E6, E7, E8, and E9 are made of plastic.

[0195] The detailed parameters of the imaging device in the fifth embodiment are listed in Table 5 below. The parameter definitions in Table 5 are the same as those in the first embodiment, and will not be repeated here.

[0196]

[0197]

[0198] <Sixth Embodiment>

[0199] The imaging device of the sixth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed optical lenses between the six optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0200] Each optical lens has an object-side surface and an image-side surface. Optical lenses E1 and E2 are made of glass, and each optical lens E1 and E2 includes an anti-reflective coating, which is located on at least one of the object-side and image-side surfaces of optical lenses E1 and E2, respectively. Optical lenses E3, E4, E5, and E6 are made of plastic.

[0201] The detailed parameters of the imaging device in the sixth embodiment are listed in Table 6 below. The parameter definitions in Table 6 are the same as those in the first embodiment, and will not be repeated here.

[0202]

[0203]

[0204] <Seventh Embodiment>

[0205] The imaging device of the seventh embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed optical lenses between the six optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0206] Each optical lens has an object-side surface and an image-side surface. Optical lenses E1, E2, E3, E4, E5, and E6 are made of glass, and each of them includes an anti-reflective coating. The anti-reflective coating is located on at least one of the object-side surface and the image-side surface of each of the optical lenses E1, E2, E3, E4, E5, and E6.

[0207] The detailed parameters of the imaging device in the seventh embodiment are listed in Table 7 below. The parameter definitions in Table 7 are the same as those in the first embodiment, and will not be repeated here.

[0208]

[0209]

[0210] <Eighth Embodiment>

[0211] The imaging device of the eighth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed optical lenses between the six optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0212] Each optical lens has an object-side surface and an image-side surface. Optical lenses E1, E2, E3, E4, E5, and E6 are made of glass, and each of them includes an anti-reflective coating. The anti-reflective coating is located on at least one of the object-side surface and the image-side surface of each of the optical lenses E1, E2, E3, E4, E5, and E6.

[0213] The detailed parameters of the imaging device of the eighth embodiment are listed in Table 8 below. The parameter definitions in Table 8 are the same as those of the first embodiment, and will not be repeated here.

[0214]

[0215]

[0216] <Ninth Embodiment>

[0217] The imaging device of the ninth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6 and an imaging surface. The electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes six optical lenses (E1, E2, E3, E4, E5, E6). There are no other interposed optical lenses between the six optical lenses, and each pair of adjacent optical lenses has an air gap on the optical axis.

[0218] Each optical lens has an object-side surface and an image-side surface. Optical lenses E1, E2, E3, E4, E5, and E6 are made of glass, and each of them includes an anti-reflective coating. The anti-reflective coating is located on at least one of the object-side surface and the image-side surface of each of the optical lenses E1, E2, E3, E4, E5, and E6.

[0219] The detailed parameters of the imaging device of the ninth embodiment are listed in Table 9 below. The parameter definitions in Table 9 are the same as those of the first embodiment, and will not be repeated here.

[0220]

[0221]

[0222] <Tenth Embodiment>

[0223] The imaging device of the tenth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes seven optical lenses (E1, E2, E3, E4, E5, E6, E7), and there are no other interposed optical lenses between the seven optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0224] Each optical lens has an object-side surface and an image-side surface. Optical lenses E1, E2, E4, E5, and E6 are made of glass, while optical lenses E3 and E7 are made of molded glass. Each of the optical lenses E1, E2, E3, E4, E5, E6, and E7 includes an anti-reflective coating, which is located on at least one of the object-side and image-side surfaces of each of the optical lenses E1, E2, E3, E4, E5, E6, and E7.

[0225] The detailed parameters of the imaging device of the tenth embodiment are listed in Table 10 below. The parameter definitions in Table 10 are the same as those of the first and second embodiments, and will not be repeated here.

[0226]

[0227]

[0228] <Eleventh Embodiment>

[0229] The imaging device of the eleventh embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7, optical lens E8 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes eight optical lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed optical lenses between the eight optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0230] Each optical lens has an object-side surface and an image-side surface. Optical lenses E2, E3, E4, E6, E7, and E8 are made of glass, while optical lenses E1 and E5 are made of molded glass. Each of the optical lenses E1, E2, E3, E4, E5, E6, E7, and E8 includes an anti-reflective coating, which is located on at least one of the object-side surface and the image-side surface of each of the optical lenses E1, E2, E3, E4, E5, E6, E7, and E8.

[0231] The detailed parameters of the imaging device of the eleventh embodiment are listed in Table 11 below. The parameter definitions in Table 11 are the same as those of the first and second embodiments, and will not be repeated here.

[0232]

[0233]

[0234] <Twelfth Embodiment>

[0235] The imaging device of the twelfth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lens E1, optical lens E2, optical lens E3, optical lens E4, optical lens E5, optical lens E6, optical lens E7, optical lens E8 and an imaging surface, and the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes eight optical lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed optical lenses between the eight optical lenses. Each pair of adjacent optical lenses has an air gap on the optical axis.

[0236] Each optical lens has an object-side surface and an image-side surface. Optical lenses E1, E2, E3, E4, E5, E6, and E7 are made of glass, while optical lens E8 is made of molded glass. Each of optical lenses E1, E2, E3, E4, E5, E6, E7, and E8 includes an anti-reflective coating, which is located on at least one of the object-side surface and the image-side surface of each of the optical lenses E1, E2, E3, E4, E5, E6, E7, and E8.

[0237] The detailed parameters of the imaging device of the twelfth embodiment are listed in Table 12 below. The parameter definitions in Table 12 are the same as those of the first and second embodiments, and will not be repeated here.

[0238]

[0239]

[0240]

[0241] <Thirteenth Embodiment>

[0242] The imaging device of the thirteenth embodiment includes an imaging optical lens and an electronic photosensitive element. The imaging optical lens includes, from the object side to the image side of the optical path, optical lenses E1, E2, E3, E4, E5, E6, E7, E8, and E9, and an imaging surface. The electronic photosensitive element is disposed on the imaging surface of the imaging optical lens. The imaging optical lens includes nine optical lenses (E1, E2, E3, E4, E5, E6, E7, E8, and E9). There are no other interposed optical lenses between the nine optical lenses, and each pair of adjacent optical lenses has an air gap on the optical axis.

[0243] Each optical lens has an object-side surface and an image-side surface. Optical lenses E1, E2, E3, E4, E5, E6, E7, and E9 are made of glass, while optical lens E8 is made of molded glass. Each of optical lenses E1, E2, E3, E4, E5, E6, E7, E8, and E9 includes an anti-reflective coating, which is located on at least one of the object-side surface and the image-side surface of each of the optical lenses E1, E2, E3, E4, E5, E6, E7, E8, and E9.

[0244] The detailed parameters of the imaging device of the thirteenth embodiment are listed in Table 13 below. The parameter definitions in Table 13 are the same as those in the first and second embodiments, and will not be repeated here.

[0245]

[0246]

[0247]

[0248] <Anti-reflective film configuration>

[0249] The following provides a further explanation and comparison of the antireflective film configurations for the first to third comparative examples and the first to third embodiments. The antireflective film configurations for the first and second comparative examples are listed in Table 14 below.

[0250]

[0251]

[0252] The configuration of the antireflective film in the third comparative example and the first embodiment is listed in Table 15 below.

[0253]

[0254] The first film layer of the first embodiment disclosed herein is in contact with the surface of the optical lens. It is made of Al2O3, has a thickness of 36 nm, and a refractive index of 1.64. The second film layer is above and in contact with the first film layer. It is made of TiO2, has a thickness of 9 nm, and a refractive index of 2.31. The third film layer is above and in contact with the second film layer. It is made of SiO2, has a thickness of 63 nm, and a refractive index of 1.47. The fourth film layer is above and in contact with the third film layer. It is made of TiO2, has a thickness of 5 nm, and a refractive index of 2.31. The fifth film layer is above and in contact with the fourth film layer. It is made of Al2O3, has a thickness of 224 nm, and its refractive index varies in a gradient, decreasing as it moves further away from the optical lens.

[0255] In this disclosure, TNL represents the total thickness of the overall low-refractive-index film, TL1 represents the thickness of the first film layer, and TL3 represents the thickness of the third film layer. In the first embodiment, TNL is the sum of TL1 and TL3, i.e., TNL = TL1 + TL3, which satisfies the condition: TNL = 99 nm.

[0256] In this disclosure, TNH represents the total thickness of the overall high refractive index film, TL2 represents the thickness of the second film, and TL4 represents the thickness of the fourth film. In the first embodiment, TNH is the sum of TL2 and TL4, i.e., TNH = TL2 + TL4, which satisfies the condition: TNH = 14 nm.

[0257] In this disclosure, TNG represents the thickness of the graded refractive index film, and TL5 represents the thickness of the fifth film layer. In the first embodiment, TNG is TL5, so TNG / tTK = TL5 / tTK, which satisfies the condition: TNG / tTK = 0.66.

[0258] The antireflective film configurations of the second and third embodiments are listed in Table 16 below. The parameter definitions in Table 16 are the same as those in the preceding paragraphs, and will not be repeated here.

[0259]

[0260]

[0261] All the above results were obtained using incident light with a reference wavelength of 510 nm and an incident angle of 0 degrees.

[0262] As can be seen from Tables 14 to 16, the antireflective film disclosed herein has an appropriate film layer configuration. By controlling the film thickness of the gradient refractive index film, it maintains the optimal pore structure and effectively achieves the optimal gradient refractive index design to enhance the antireflective effect of light incident at large angles and avoid reducing the antireflective effect due to insufficient film thickness. Furthermore, by controlling the high refractive index film layer and the low refractive index film layer to achieve a specific thickness, it makes it easy for reflected light to produce destructive interference phenomena on the surface of the spaced film layers, which helps to improve the antireflective effect.

[0263] <Measurement results of antireflective coating thickness>

[0264] The antireflective film of the first comparative example and the first to third embodiments were measured below. The total thickness (Tc) of the antireflective film located at the center of the optical lens and the total thickness (Tp) of the antireflective film located at the periphery of the optical lens are listed in Table 17 below.

[0265]

[0266] As can be seen from Table 17, the total thickness difference of the anti-reflective film at the center and periphery of the optical lens is very small, which proves that the thickness of the anti-reflective film is quite uniform. It not only effectively solves the defect of reflected light caused by the inability to uniformly coat the film when the peripheral surface shape changes drastically, but also helps to improve the anti-reflective effect of the surface where light is incident at a large angle.

[0267] <Reflectance Measurement Results at Different Wavelengths>

[0268] The reflectance at different wavelengths was measured for the first comparative example, the third comparative example, and the first to third embodiments. The reflectance measurement results of the first comparative example and the third comparative example are listed in Table 18 below.

[0269]

[0270]

[0271]

[0272]

[0273]

[0274] The reflectance measurement results of the first to third embodiments are listed in Table 19 below.

[0275]

[0276]

[0277]

[0278]

[0279]

[0280]

[0281] Please refer to the above as well. Figures 2 to 6 , Figure 2 This is a graph showing the relationship between reflectivity and wavelength for the first comparative example. Figure 3 This is a graph showing the relationship between reflectivity and wavelength for the third comparative example. Figure 4 This is a graph showing the relationship between reflectivity and wavelength in the first embodiment. Figure 5 This is a graph showing the relationship between reflectivity and wavelength in the second embodiment. Figure 6 This is a graph showing the relationship between reflectivity and wavelength in the third embodiment. (See Tables 18 and 19.) Figures 2 to 6 It can be seen that the imaging device disclosed herein can effectively provide anti-reflection effects over a wide wavelength range and solve the problem of severe reflection of light when incident at large angles.

[0282] <Antioxidant Properties Test>

[0283] Please refer to the above as well. Figure 7A and Figure 7B , Figure 7A This is a surface quality diagram of the optical lens substrate for the second comparative example. Figure 7B This is a surface quality diagram of the optical lens substrate in the first embodiment. From... Figure 7A and Figure 7B As can be seen, the optical lens substrate of the second comparative example is obviously oxidized, and the surface shows spot defects, while the optical lens substrate of the first embodiment has an anti-oxidation effect and excellent surface quality, indicating that the anti-reflective film of the imaging device disclosed herein can provide the anti-oxidation effect of the optical lens substrate.

[0284] <Fourteenth Embodiment>

[0285] Please refer to Figure 8 This illustration shows a perspective view of an image-capturing device 100 according to the fourteenth embodiment of this disclosure. Figure 8As can be seen, the image capturing device 100 of the fourteenth embodiment is a camera module. The image capturing device 100 includes an imaging lens 101, a driving device assembly 102, and an electronic image sensor 103. The imaging lens 101 includes the imaging optical lens disclosed herein and a lens barrel (not otherwise labeled) that carries the imaging optical lens. The image capturing device 100 uses the imaging lens 101 to focus light and capture an image of the subject, and works with the driving device assembly 102 to focus the image. Finally, the image is captured on the electronic image sensor 103, and the image data is output.

[0286] The drive unit assembly 102 can be an autofocus module, and its driving method can be a drive system such as a voice coil motor, microelectromechanical system, piezoelectric system, or shape memory metal. The drive unit assembly 102 enables the imaging optical lens to achieve a better imaging position, and can provide clear images of the subject at different object distances.

[0287] The image capturing device 100 may be equipped with a high-sensitivity and low-noise electronic image sensor 103 (such as CMOS or CCD) disposed on the imaging surface of the imaging optical lens, which can truly present the good image quality of the imaging optical lens. In addition, the image capturing device 100 may also include an image stabilization module 104, which may be a kinetic energy sensing element such as an accelerometer, gyroscope, or Hall effect sensor. In the fourteenth embodiment, the image stabilization module 104 is a gyroscope, but it is not limited thereto. By adjusting the changes in different axes of the imaging optical lens to compensate for the blurry image caused by shaking at the moment of shooting, the image quality of shooting in dynamic and low-light scenes is further improved, and advanced image compensation functions such as optical image stabilization (OIS) and electronic image stabilization (EIS) are provided.

[0288] <Fifteenth Embodiment>

[0289] Please refer to Figure 9A , Figure 9B and Figure 9C ,in Figure 9A A schematic diagram showing one side of an electronic device 200 according to the fifteenth embodiment of this disclosure is provided. Figure 9B Drawing according to Figure 9A A schematic diagram of the other side of the electronic device 200. Figure 9C Drawing according to Figure 9A A system schematic diagram of the electronic device 200. (By...) Figure 9A , Figure 9B and Figure 9CAs can be seen, the electronic device 200 of the fifteenth embodiment is a smartphone. The electronic device 200 includes image capturing devices 100, 110, 120, 130, and 140, a flash module 201, a focus assist module 202, an image signal processor (ISP), a user interface 204, and an image software processor 205, wherein the image capturing devices 120, 130, and 140 are front-facing cameras. When the user takes a picture of the subject 206 using the user interface 204, the electronic device 200 uses the image capturing devices 100, 110, 120, 130, and 140 to capture the image, activates the flash module 201 for supplemental lighting, and uses the subject distance information provided by the focus assist module 202 for fast focusing. In addition, the image signal processor 203 and the image software processor 205 perform image optimization processing to further improve the image quality produced by the image lens. The focus assist module 202 can use an infrared or laser focus assist system to achieve fast focusing, and the user interface 204 can use a touch screen or a physical shooting button, combined with the diverse functions of the image processing software for image shooting and image processing.

[0290] At least one of the image-capturing devices 100, 110, 120, 130, and 140 in the fifteenth embodiment may include the imaging optical lens disclosed herein, and may have the same or similar structure as the image-capturing device 100 in the fourteenth embodiment, which will not be described again here. Specifically, the image-capturing devices 100 and 110 in the fifteenth embodiment may be a wide-angle image-capturing device and an ultra-wide-angle image-capturing device, or a wide-angle image-capturing device and a telephoto image-capturing device, respectively. The image-capturing devices 120, 130, and 140 may be a wide-angle image-capturing device, an ultra-wide-angle image-capturing device, and a TOF module (Time-Of-Flight), respectively, but are not limited to this configuration. Furthermore, the connection relationships between the image-capturing devices 110, 120, 130, and 140 and other components can be... Figure 9C The image capturing device 100 shown in the figure is the same as that shown in the figure, or may be adapted to the type of image capturing device, and will not be shown or described in detail here.

[0291] <Sixteenth Embodiment>

[0292] Please refer to Figure 10 The diagram illustrates a side view of an electronic device 300 according to the sixteenth embodiment of this disclosure. The electronic device 300 of the sixteenth embodiment is a smartphone, and the electronic device 300 includes image capturing devices 310, 320, and 330 and a flash module 301.

[0293] The electronic device 300 of the sixteenth embodiment may include the same or similar elements as those in the fifteenth embodiment, and the connection relationships between the image capturing devices 310, 320, and 330 and other elements may also be the same or similar as those disclosed in the fifteenth embodiment, which will not be repeated here. The image capturing devices 310, 320, and 330 in the sixteenth embodiment may all include the imaging optical lens disclosed herein, and may all have the same or similar structure as the image capturing device 100 in the fourteenth embodiment, which will not be repeated here. Specifically, the image capturing device 310 may be an ultra-wide-angle image capturing device, the image capturing device 320 may be a wide-angle image capturing device, and the image capturing device 330 may be a telephoto image capturing device (which may include an optical path reversing element), or may be other types of image capturing devices, and is not limited to this configuration.

[0294] <Seventeenth Embodiment>

[0295] Please refer to Figure 11 The diagram illustrates a side view of an electronic device 400 according to the seventeenth embodiment of the present disclosure. The electronic device 400 of the seventeenth embodiment is a smartphone, and the electronic device 400 includes image capturing devices 410, 420, 430, 440, 450, 460, 470, 480, 490 and a flash module 401.

[0296] The electronic device 400 of the seventeenth embodiment may include the same or similar elements as those in the fifteenth embodiment, and the connection relationships between the image capturing devices 410, 420, 430, 440, 450, 460, 470, 480, 490 and the flash module 401 and other elements may also be the same or similar as those disclosed in the fifteenth embodiment, and will not be repeated here. The image capturing devices 410, 420, 430, 440, 450, 460, 470, 480, and 490 in the seventeenth embodiment may all include the imaging optical lenses disclosed herein, and may all have the same or similar structures as the image capturing device 100 in the fourteenth embodiment, and will not be repeated here.

[0297] In detail, imaging devices 410 and 420 can be ultra-wide-angle imaging devices, imaging devices 430 and 440 can be wide-angle imaging devices, imaging devices 450 and 460 can be telephoto imaging devices, imaging devices 470 and 480 can be telephoto imaging devices (which may include optical path bending elements), and imaging device 490 can be a TOF module, or other types of imaging devices, and is not limited to this configuration.

[0298] <Eighteenth Embodiment>

[0299] Please refer to Figure 12A as well as Figure 12B ,in Figure 12AA schematic diagram showing one side of an electronic device 500 according to the eighteenth embodiment of this disclosure is provided. Figure 12B Drawing according to Figure 12A A schematic diagram of the other side of the electronic device 500. (By...) Figure 12A as well as Figure 12B It is understood that the electronic device 500 of the eighteenth embodiment is a smartphone, and the electronic device 500 includes image capturing devices 510, 520, 530, 540 and user interface 504.

[0300] The electronic device 500 of the eighteenth embodiment may include the same or similar components as those in the fifteenth embodiment, and the connection relationships between the image capturing devices 510, 520, 530, 540 and the user interface 504 and other components may also be the same or similar as those disclosed in the fifteenth embodiment, and will not be repeated here. In detail, the image capturing device 510 may capture an image through a non-circular opening on the outside of the electronic device, and the image capturing devices 520, 530, and 540 may be a telephoto image capturing device, a wide-angle image capturing device, and an ultra-wide-angle image capturing device, respectively, or may be other types of image capturing devices, and are not limited to this configuration.

[0301] <Nineteenth Embodiment>

[0302] Please refer to Figure 13A The diagram illustrates a top view of a vehicle tool 600 according to the nineteenth embodiment of this disclosure. Figure 13A As shown, the vehicle tool 600 includes a plurality of camera modules 610. The camera module 610 may include an imaging optical lens and an electronic photosensitive element (not shown) of any of the foregoing embodiments, and the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens (not shown), but the present disclosure is not limited thereto.

[0303] Please refer to the following: Figure 13B and Figure 13C ,in Figure 13B Drawing according to Figure 13A A partially enlarged schematic diagram of the vehicle tool 600. Figure 13C Drawing according to Figure 13A Another schematic diagram of vehicle tool 600. (See diagram below.) Figure 13A and Figure 13B As shown, the camera module 610 can be installed inside the vehicle tool 600. Specifically, the camera module 610 is installed near the rearview mirror and near the rear window. Furthermore, the camera module 610 can be installed on the non-mirror surfaces of the left and right rearview mirrors of the vehicle tool 600. Figure 13CAs shown, the configuration of the camera module 610 helps the driver obtain information about the external space outside the cockpit, such as external space information S1, S2, S3, and S4, but this disclosure is not limited to this. This provides more perspectives to reduce blind spots, thereby helping to improve driving safety.

[0304] This disclosure describes the application of multilayer coating technology to the surface of optical lenses or optical elements in imaging optical lenses. The combination of high and low refractive index films and graded refractive index films achieves excellent anti-reflection effects, reducing the problem of severe reflection in the peripheral area of ​​the optical lens when light is incident on the surface of the optical lens at a large angle, effectively improving the light transmittance of the imaging optical lens, and achieving the best anti-reflection effect.

[0305] This disclosure utilizes a uniform and dense anti-reflective coating to significantly enhance the material's oxidation resistance, thereby protecting optical lenses and components. Through atomic layer deposition (ALD) technology, this disclosure achieves precise control of film thickness and maintains overall coating uniformity, making it suitable for high-end imaging optical lenses with high design freedom for curved surfaces.

[0306] This disclosure utilizes the optical interference phenomenon by alternating stacks of multiple high-refractive-index and low-refractive-index film layers. Through the design of different refractive indices and appropriate film thicknesses, light is destructively interfered with the film surface to reduce reflected light. Furthermore, the gradient refractive index film features a gradually changing hole structure and its gradient refractive index, effectively providing anti-reflection effects over a wide wavelength range and solving the problem of severe reflection of light at large angles of incidence.

[0307] This disclosure utilizes atomic layer deposition (ALD) technology to achieve atomic-level precision, freeing it from the limitations of the surface geometry of imaging optical lenses. It enables precise control over film thickness and uniform coating capabilities, enhancing the design freedom of optical lens surfaces. Furthermore, it allows for the deposition of a uniform and dense anti-reflective film on the imaging optical lens surface, effectively preventing further contact between airborne water and oxygen. This significantly improves the oxidation resistance of optical lenses with insufficient water and acid resistance, contributing to the overall quality improvement of optical lenses and components to meet the requirements of high-quality imaging optical lenses.

[0308] Although the present disclosure has been presented above with reference to embodiments, it is not intended to limit the present disclosure. Any person skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the scope defined in the appended claims.

Claims

1. An imaging optical lens, characterized in that, Include: At least one optical lens; The optical lens is made of glass and includes an anti-reflective film located on at least one surface of the optical lens. The anti-reflective film includes a high-low refractive index film and a gradient refractive index film, wherein the high-low refractive index film is disposed between the optical lens and the gradient refractive index film. The high and low refractive index film includes at least one high refractive index film layer and at least one low refractive index film layer, which are alternately stacked. The low refractive index film layer contacts the optical lens, and the main material of the low refractive index film layer is aluminum oxide. The gradient refractive index film contains multiple pores, with the pores farther away from the optical lens being relatively larger than those closer to the optical lens, and the main material of the gradient refractive index film is a metal oxide. The total thickness of the anti-reflective coating located at the center of the optical lens is Tc, and the total thickness of the anti-reflective coating located at the periphery of the optical lens is Tp, which satisfies the following conditions: 0% < |Tc-Tp| / Tc ≤ 15.0%.

2. The imaging optical lens as described in claim 1, characterized in that, The total thickness of the antireflective film is tTK, which satisfies the following condition: 200nm≤tTK≤800nm.

3. The imaging optical lens as described in claim 1, characterized in that, The refractive index of this high-refractive-index film is NH, and it satisfies the following condition: 2.00≤NH.

4. The imaging optical lens as described in claim 1, characterized in that, The refractive index of this low-refractive-index film is NL, and it satisfies the following condition: NL≤1.

80.

5. The imaging optical lens as described in claim 1, characterized in that, The total thickness of the high refractive index film is TNH, which satisfies the following condition: 1nm≤TNH≤60nm.

6. The imaging optical lens as described in claim 1, characterized in that, The total thickness of the low-refractive-index film is TNL, and it satisfies the following condition: 1nm≤TNL≤300nm.

7. The imaging optical lens as described in claim 1, characterized in that, The thickness of the low-refractive-index film in contact with the optical lens is TL1, and it satisfies the following conditions: 10nm≤TL1≤100nm.

8. The imaging optical lens as described in claim 1, characterized in that, The thickness of the graded refractive index film is TNG, and the total thickness of the antireflective film is tTK, which satisfies the following conditions: 0.45≤TNG / tTK≤0.

85.

9. The imaging optical lens as described in claim 1, characterized in that, The material of this gradient refractive index film is aluminum oxide.

10. The imaging optical lens as described in claim 1, characterized in that, The total thickness of the anti-reflective coating located at the center of the optical lens is Tc, and the total thickness of the anti-reflective coating located at the periphery of the optical lens is Tp, which satisfies the following condition: 0% < |Tc-Tp| / Tc ≤ 10.0%.

11. The imaging optical lens as described in claim 1, characterized in that, The horizontal displacement of the surface of the optical lens at its maximum effective diameter is SAG, and the total thickness of the antireflective coating is tTK, which satisfies the following conditions: 0≤|SAG| / tTK≤10.

0.

12. The imaging optical lens as described in claim 1, characterized in that, The optical lens has an average reflectance of R40100 at wavelengths from 400 nm to 1000 nm, which satisfies the following conditions: 0％<R40100≤1.00％。 13. The imaging optical lens as described in claim 1, characterized in that, The optical lens has an average reflectance of R4070 at wavelengths from 400 nm to 700 nm, which satisfies the following conditions: 0％<R4070≤1.00％。 14. The imaging optical lens as described in claim 1, characterized in that, The optical lens has an average reflectance of R70100 at wavelengths from 700 nm to 1000 nm, which satisfies the following conditions: 0％<R70100≤1.00％。 15. The imaging optical lens as described in claim 1, characterized in that, The dispersion coefficient of this optical lens is Vs, which satisfies the following condition: 35.0≤Vs≤85.

0.

16. The imaging optical lens as described in claim 15, characterized in that, The refractive index of the optical lens is Ns, which satisfies the following condition: Ns≤1.

85.

17. The imaging optical lens as described in claim 1, characterized in that, The optical lens has an acid resistance of Da and a dispersion coefficient of Vs, and satisfies the following conditions: 0.6≤Vs×Da / 10≤13.

0.

18. The imaging optical lens as described in claim 14, characterized in that, The optical lens has an acid resistance of Da and a refractive index of Ns, and satisfies the following conditions: 0.1≤Ns×Da≤4.

5.

19. The imaging optical lens as described in claim 1, characterized in that, The optical lens has a water resistance of Dw and a dispersion coefficient of Vs, and satisfies the following conditions: 0 <Vs×Dw≤10.0。 20. The imaging optical lens as described in claim 16, characterized in that, The optical lens has a water resistance of Dw and a refractive index of Ns, and satisfies the following conditions: 0 <Ns×Dw×100≤50。 21. The imaging optical lens as described in claim 1, characterized in that, It also includes at least one optical element made of glass, the optical element including an anti-reflective film located on at least one surface of the optical element, and the optical element being a prism.

22. An image capturing device, characterized in that, Include: The imaging optical lens as described in claim 1; and An electronic photosensitive element is disposed on an imaging surface of the imaging optical lens.

23. An electronic device, which is a vehicle-mounted device, characterized in that, The electronic device includes: The imaging device as described in claim 22.

24. An imaging optical lens, characterized in that, Include: At least two optical lenses; and At least one optical element; At least one of the optical lenses includes a long-wavelength absorbing material, and the optical lens including the long-wavelength absorbing material is made of a plastic material, wherein the long-wavelength absorbing material is uniformly mixed in the plastic material; At least one of the optical lenses includes a long-wavelength filtering coating located on the object-side surface or image-side surface of the optical lens. The long-wavelength filtering coating includes a plurality of high-refractive-index film layers and a plurality of low-refractive-index film layers, and the plurality of high-refractive-index film layers and the plurality of low-refractive-index film layers of the long-wavelength filtering coating are alternately stacked. The optical element is made of glass, includes an anti-reflective film, the anti-reflective film is located on at least one surface of the optical element, and the optical element is a flat glass plate. The anti-reflective film of the optical element includes a high-low refractive index film and a gradient refractive index film, wherein the high-low refractive index film is disposed between the optical element and the gradient refractive index film. The high-low refractive index film includes at least one high refractive index film layer and at least one low refractive index film layer. The high refractive index film layer and the low refractive index film layer of the high-low refractive index film are alternately stacked. The low refractive index film layer of the high-low refractive index film contacts the optical element. The main material of the low refractive index film layer of the high-low refractive index film is aluminum oxide. The gradient refractive index film contains multiple pores, with the pores farther away from the optical element being relatively larger than those closer to the optical element, and the main material of the gradient refractive index film is a metal oxide. The total thickness of the anti-reflective film located at the center of the optical element is Tc, and the total thickness of the anti-reflective film located around the periphery of the optical element is Tp, which satisfies the following condition: 0% < |Tc-Tp| / Tc ≤ 15.0%.

Images