Imaging lens and electronic device

Abstract

An imaging lens and an electronic device are disclosed. The imaging lens has an optical axis and includes a plastic lens group. The plastic lens group includes two plastic lenses and at least one anti-reflective layer. The two plastic lenses are sequentially arranged as a first plastic lens and a second plastic lens along the optical axis from the object side to the image side. The anti-reflective layer has a nanostructure and is disposed on at least one of the image-side surface of the first plastic lens and the object-side surface of the second plastic lens. Under certain conditions, this is beneficial for improving the resolving power performance of the imaging lens.

Description

[0001] This application is a divisional application of a patent application with an application date of September 13, 2021, an application number of 202111077070.3, and an invention title of "Imaging Lens and Electronic Device". Technical Field

[0002] The present disclosure relates to an imaging lens, and particularly to an imaging lens including a plastic lens group applied to a portable electronic device. Background Art

[0003] In recent years, portable electronic devices have developed rapidly, such as smart electronic devices, tablet computers, etc., which have flooded into modern people's lives, and the imaging lenses mounted on portable electronic devices have also developed vigorously. However, with the increasing progress of technology, users' requirements for the quality of imaging lenses are also getting higher and higher. Therefore, developing an imaging lens that can improve the mobile resolution performance has become an important and urgent problem in the industry. Summary of the Invention

[0004] The present disclosure provides an imaging lens and an electronic device, which reduce the light reflection intensity inside the air gap and improve the resolution performance of the imaging lens by setting a first plastic lens, a second plastic lens, and an anti-reflection layer.

[0005] According to an embodiment of the present disclosure, an imaging lens is provided. The imaging lens has an optical axis and includes a plastic lens group. The plastic lens group includes two plastic lenses and at least one anti-reflection layer. The two plastic lenses are, in order from the object side to the image side along the optical axis, a first plastic lens and a second plastic lens. The anti-reflection layer has a nanostructure and is disposed on at least one of the image-side surface of the first plastic lens and the object-side surface of the second plastic lens. A minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is located between the optical effective regions of the image-side surface of the first plastic lens and the object-side surface of the second plastic lens. The central distance from the near-optical-axis portion of the image-side surface of the first plastic lens to the near-optical-axis portion of the object-side surface of the second plastic lens is d, the minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is AG1, and the minimum air gap is formed on the anti-reflection layer. The grain height of the nanostructure is gH, which satisfies the following conditions: 65 nm < gH < 600 nm; and 0.001 ≤ AG1 / d < 0.7.

[0006] For the imaging lens according to the above-described embodiment, the anti-reflection layer may include a metal oxide layer.

[0007] An imaging lens according to the embodiment described in the previous paragraph, wherein the minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is AG1, and the peripheral air gap between the edge of the optically effective area of the image-side surface of the first plastic lens and the edge of the optically effective area of the object-side surface of the second plastic lens is AG2, which can satisfy the following conditions: 0.01 < AG1 / AG2 < 0.9. Further, it can satisfy the following conditions: 0.01 < AG1 / AG2 < 0.64.

[0008] An imaging lens according to the embodiment described in the previous paragraph, wherein the minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is AG1, which can satisfy the following conditions: 0.001 mm < AG1 < 0.06 mm.

[0009] An imaging lens according to the embodiment described in the previous paragraph, wherein the grain height of the nanostructure is gH, which can satisfy the following conditions: 85 nm < gH < 470 nm.

[0010] An imaging lens according to the embodiment described in the previous paragraph, wherein the reflectance of the anti-reflection layer at a wavelength of 400 nm is R400, the reflectance of the anti-reflection layer at a wavelength of 600 nm is R600, and the reflectance of the anti-reflection layer at a wavelength of 700 nm is R700, which can satisfy the following conditions: 0.0% < R400 ≤ 1.0%; 0.0% < R600 ≤ 1.0%; and 0.0% < R700 ≤ 1.0%. Furthermore, it can satisfy the following conditions: 0.0% < R700 < 0.6%.

[0011] An imaging lens according to the embodiment described in the previous paragraph may further include a first light-shielding sheet. The first light-shielding sheet is disposed between the first plastic lens and the second plastic lens and has an opening. The diameter of the optically effective area of the image-side surface of the first plastic lens is ID1, the diameter of the optically effective area of the object-side surface of the second plastic lens is OD2, and the diameter of the opening of the first light-shielding sheet is SD1, which can satisfy the following conditions: ID1 < SD1 < OD2.

[0012] An imaging lens according to the embodiment described in the previous paragraph may further include a second light-shielding sheet. The second light-shielding sheet is disposed between the first plastic lens and the second plastic lens and has an opening. The diameter of the optically effective area of the image-side surface of the first plastic lens is ID1, the diameter of the optically effective area of the object-side surface of the second plastic lens is OD2, and the diameter of the opening of the second light-shielding sheet is SD2, which can satisfy the following conditions: SD2 < ID1 < OD2.

[0013] An electronic device according to an embodiment of the present disclosure includes the imaging lens of the foregoing embodiment and an electronic photosensitive element. The electronic photosensitive element corresponds to the imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A A schematic diagram of an imaging lens according to the first embodiment of this disclosure is shown;

[0015] Figure 1B Drawing according to Figure 1A A schematic diagram of the parameters of the imaging lens in the first embodiment;

[0016] Figure 2A A schematic diagram of an imaging lens according to the second embodiment of this disclosure is shown;

[0017] Figure 2B Drawing according to Figure 2A A schematic diagram of the imaging lens parameters in the second embodiment;

[0018] Figure 3A A schematic diagram of an imaging lens according to the third embodiment of this disclosure is shown;

[0019] Figure 3B Drawing according to Figure 3A A schematic diagram of the imaging lens parameters in the third embodiment;

[0020] Figure 4A A schematic diagram of an imaging lens according to the fourth embodiment of this disclosure is shown;

[0021] Figure 4B Drawing according to Figure 4A A schematic diagram of the imaging lens parameters in the fourth embodiment;

[0022] Figure 5 Drawing according to Figure 1A A diagram showing the relationship between the reflectivity of the antireflective layer and wavelength in the first embodiment;

[0023] Figure 6 Drawing according to Figure 2A The relationship between the reflectivity of the anti-reflection layer and wavelength in the second embodiment;

[0024] Figure 7 A cross-sectional view of the center of the optically effective region of at least one of the image-side surface of the first plastic lens and the object-side surface of the second plastic lens, according to the present disclosure, is shown.

[0025] Figure 8 A cross-sectional view of the edge of the optically effective region of at least one of the image-side surface of the first plastic lens and the object-side surface of the second plastic lens, according to the present disclosure.

[0026] Figure 9A A schematic diagram illustrating one side of the electronic device according to the fifth embodiment of this disclosure; and

[0027] Figure 9B Drawing according to Figure 9A A schematic diagram of the imaging lens, electronic image sensor, drive unit assembly, and image stabilization module.

[0028] [Symbol Explanation]

[0029] 10: Electronic devices

[0030] 12: Electronic photosensitive element

[0031] 13: Drive unit group

[0032] 14: Image Stabilization Module

[0033] 11, 100, 200, 300, 400: Imaging lens

[0034] 111,112,211,212,311,312,411,412: Lens

[0035] 111a, 112b, 212b, 312b: Light-blocking sheets

[0036] 112a,121a,212a,221a,312a,321a,412a,421a: Spacer rings

[0037] 120, 220, 320, 420: Air gap

[0038] 121,221,321,421: First plastic lens

[0039] 122,222,322,422: Second plastic lens

[0040] 122a, 222a, 322a, 422a: Fixed rings

[0041] 123,223,323,423: Anti-reflective layer

[0042] 130, 230, 330, 430: Lens tube

[0043] 140, 240, 340, 440: First light-blocking plate

[0044] 450: Second light-blocking sheet

[0045] X: Optical axis

[0046] C: Reflectivity of the antireflective layer at the center of the optically effective region

[0047] P: Reflectivity of the antireflective layer at the edge of the optically effective region

[0048] gH: Grain height of nanostructure

[0049] d: The central distance from the near optical axis of the image side surface of the first plastic lens to the near optical axis of the object side surface of the second plastic lens

[0050] AG1: The minimum air gap

[0051] AG2: The peripheral air gap

[0052] ID1: The diameter of the optically effective area of the image side surface of the first plastic lens

[0053] OD2: The diameter of the optically effective area of the object side surface of the second plastic lens

[0054] SD1: The diameter of the opening of the first light-shielding sheet

[0055] SD2: The diameter of the opening of the second light-shielding sheet Detailed implementation manners

[0056] The present disclosure provides an imaging lens having an optical axis and including a plastic lens group. The plastic lens group includes two plastic lenses and at least one anti-reflection layer. The two plastic lenses are, in order from the object side to the image side along the optical axis, a first plastic lens and a second plastic lens. The anti-reflection layer has a nanostructure and is disposed on at least one of the image side surface of the first plastic lens and the object side surface of the second plastic lens. The central distance from the near optical axis of the image side surface of the first plastic lens to the near optical axis of the object side surface of the second plastic lens is d, a minimum air gap between the off-axis position of the image side surface of the first plastic lens and the off-axis position of the object side surface of the second plastic lens is AG1, and the minimum air gap is formed on the anti-reflection layer. The grain height of the nanostructure is gH, which satisfies the following conditions: 65 nm < gH < 600 nm; and 0.001 ≤ AG1 / d < 0.7. By forming an air gap capable of achieving a low reflection effect between the image side surface of the first plastic lens and the object side surface of the second plastic lens, and disposing an anti-reflection layer with a nanostructure on at least one of the plastic lens surfaces on both sides of the air gap, the plastic lens group can thus significantly reduce the high-intensity reflected light inside the narrow air gap, so that the resolution level of the imaging lens does not have to be limited by an excessively high lens surface reflectivity, thereby increasing the margin of optical design. Thereby, the resolution efficiency of the imaging lens can be improved.

[0057] The anti-reflective layer may comprise a metal oxide layer. Specifically, the metal oxide layer can be formed using atomic layer deposition (ALD), physical vapor deposition (PVD) techniques such as evaporation deposition or sputtering deposition, or chemical vapor deposition (CVD) techniques such as ultra-high vacuum CVD, microwave plasma-assisted CVD, plasma-enhanced CVD, or atomic layer deposition. The metal oxide layer may be composed of aluminum oxide (Al₂O₃), but this disclosure is not limited to this.

[0058] The nanostructure of the antireflective layer can also be called a subwavelength structure. Furthermore, the nanostructure can have a grass-like appearance, which can be observed using a scanning electron microscope (SEM). For further details, please refer to... Figure 7 and Figure 8 ,in Figure 7 A cross-sectional view of the center of the optically effective region of at least one of the image-side surface of the first plastic lens and the object-side surface of the second plastic lens, according to the present disclosure, is shown. Figure 8 A cross-sectional view of the edge of the optically effective region of at least one of the image-side surface of a first plastic lens and the object-side surface of a second plastic lens, according to the present disclosure, is shown. Figure 7 and Figure 8 As shown, the nanostructure has a grass-like structure, and the grain height gH of the nanostructure is 246.6 nm at the center of the optically effective region and 242.6 nm at the edge of the optically effective region. However, the content of this disclosure is not limited to the shape and grain height of the nanostructure disclosed in the figure.

[0059] The minimum air gap between the off-axis points of the image-side surface of the first plastic lens and the off-axis points of the object-side surface of the second plastic lens is located between the optically effective areas of the image-side surface of the first plastic lens and the optically effective areas of the object-side surface of the second plastic lens. Through the arrangement of the first and second plastic lenses, the intensity of light reflected once or twice can be directly reduced, avoiding the need for multiple reflections to reduce the intensity of the reflected light. This effectively reduces the intensity of light reflection within narrow air gaps.

[0060] A peripheral air gap between the edge of the optically effective area of the image side surface of the first plastic lens and the edge of the optically effective area of the object side surface of the second plastic lens is AG2, and the central distance from the near optical axis of the image side surface of the first plastic lens to the near optical axis of the object side surface of the second plastic lens is d, which can satisfy the following condition: 0.001 < AG2 / d < 1.8. Thereby, the thickness uniformity of the plastic lens can be increased. Specifically, it can avoid the excessive thickness change of the plastic lens from the center to the periphery, thereby affecting the injection molding quality of the plastic lens. Moreover, when the thickness change of the plastic lens is too large, it will affect the coating quality of the anti-reflection layer on the periphery of the lens. Thereby, the failure rate of the coating operation can be reduced.

[0061] The plastic lens group can be designed as an aspherical surface to effectively correct the optical quality of the peripheral imaging area. Further, a design of an inflection point can be provided to effectively adjust the light condensing quality of the incoming light.

[0062] The minimum air gap between the off-axis position of the image side surface of the first plastic lens and the off-axis position of the object side surface of the second plastic lens is AG1, and the peripheral air gap between the edge of the optically effective area of the image side surface of the first plastic lens and the edge of the optically effective area of the object side surface of the second plastic lens is AG2, which can satisfy the following condition: 0.01 < AG1 / AG2 < 0.9. By adjusting the position of the minimum air gap, more reflected light reflected between the lenses can be further captured. Thereby, the efficiency of intercepting the reflected light can be increased. Moreover, it can satisfy the following condition: 0.01 < AG1 / AG2 < 0.64. When the peripheral air gap is further increased, the optical design specifications can be further improved to generate a larger imaging range. Thereby, the pixel of the imaging lens can be improved.

[0063] The minimum air gap between the off-axis position of the image side surface of the first plastic lens and the off-axis position of the object side surface of the second plastic lens is AG1, which can satisfy the following condition: 0.001 mm < AG1 < 0.06 mm. When the minimum air gap is further reduced, more imaging light rays can be converged. Thereby, the imaging specifications of the imaging lens can be improved.

[0064] The grain height of the nanostructure is gH, which can satisfy the following condition: 85 nm < gH < 470 nm. Thereby, through the appropriate grain size, the production quality of mass-producing the ultra-low reflection lens and the optical requirement of reducing the reflected light can be satisfied simultaneously.

[0065] The reflectivity of the anti-reflection layer at a wavelength of 400 nm is R400, the reflectivity of the anti-reflection layer at a wavelength of 600 nm is R600, and the reflectivity of the anti-reflection layer at a wavelength of 700 nm is R700, which can meet the following conditions: 0.0% < R400 ≤ 1.0%; 0.0% < R600 ≤ 1.0%; and 0.0% < R700 ≤ 1.0%. Thereby, unnecessary surface reflection can be effectively reduced in the visible light band, and the generality of stray light elimination can be increased. Furthermore, the following conditions can be met: 0.0% < R700 < 0.6%. By further attenuating the reflected light in the infrared light band, the infrared light reflection that is easily generated by the heat dissipation of the light source in the captured image can be reduced.

[0066] The imaging lens may further include a first light shielding sheet. The first light shielding sheet is disposed between the first plastic lens and the second plastic lens and has an opening. The diameter of the optical effective area of the image side surface of the first plastic lens is ID1, the diameter of the optical effective area of the object side surface of the second plastic lens is OD2, and the diameter of the opening of the first light shielding sheet is SD1, which can meet the following conditions: ID1 < SD1 < OD2. Through the configuration of the first light shielding sheet, the non-imaging light after reflection can be further intercepted. Thereby, the redundant reflection path of light between the two plastic lenses can be reduced.

[0067] The imaging lens may further include a second light shielding sheet. The second light shielding sheet is disposed between the first plastic lens and the second plastic lens and has an opening. The diameter of the optical effective area of the image side surface of the first plastic lens is ID1, the diameter of the optical effective area of the object side surface of the second plastic lens is OD2, and the diameter of the opening of the second light shielding sheet is SD2, which can meet the following conditions: SD2 < ID1 < OD2. Through the configuration of the second light shielding sheet, a light trap can be further formed between the two plastic lenses. Thereby, the ghost images that appear under a darker black background can be captured.

[0068] Each technical feature in the imaging lens of the above disclosure can be combined and configured to achieve the corresponding effects.

[0069] The present disclosure provides an electronic device including the aforementioned imaging lens and an electronic photosensitive element, wherein the electronic photosensitive element corresponds to the aforementioned imaging lens.

[0070] According to the above embodiments, specific embodiments are proposed below and will be described in detail with reference to the accompanying drawings.

[0071] <First Embodiment>

[0072] Please refer to Figure 1A which shows a schematic diagram of the imaging lens 100 in the first embodiment of the present disclosure. From Figure 1AAs can be seen, the imaging lens 100 has an optical axis X and includes multiple lenses 111 and 112, a plastic lens group (not labeled in the figure), and a lens barrel 130. Lenses 111 and 112 and the plastic lens group are all disposed in the lens barrel 130. The plastic lens group includes two plastic lenses (not labeled in the figure) and at least one anti-reflection layer 123. The two plastic lenses are, in sequence from the object side to the image side along the optical axis X, a first plastic lens 121 and a second plastic lens 122. The anti-reflection layer 123 has a nanostructure and is disposed on at least one of the image-side surface of the first plastic lens 121 and the object-side surface of the second plastic lens 122.

[0073] By forming an air gap 120 between the image-side surface of the first plastic lens 121 and the object-side surface of the second plastic lens 122 to achieve a low-reflection effect, and by providing at least one of the plastic lens surfaces on both sides of the air gap 120 with a nanostructured anti-reflection layer 123 (in the first embodiment, the anti-reflection layer 123 is provided on the object-side surface of the second plastic lens 122 on the image side of the air gap 120), the plastic lens group can significantly reduce the high-intensity reflected light inside the narrow air gap 120. This allows the resolution level of the imaging lens 100 to be less limited by excessively high lens surface reflectivity, thereby increasing the margin for optical design. In this way, the resolution performance of the imaging lens 100 can be improved.

[0074] like Figure 1A As shown, the imaging lens 100 includes two lenses 111 and 112, which are sequentially disposed along the optical axis X from the object side to the image side on the object side of the plastic lens group (i.e., the object side of the first plastic lens 121). More specifically, the imaging lens 100 may further include two light-shielding plates 111a and 112b, two spacer rings 112a and 121a, and a fixing ring 122a. The light-shielding plate 111a is located between lenses 111 and 112, the spacer ring 112a is located between lens 112 and the first plastic lens 121, the light-shielding plate 112b is located between spacer ring 112a and the second plastic lens 122, the spacer ring 121a is located between the first plastic lens 121 and the second plastic lens 122, and the fixing ring 122a is disposed on the image side of the second plastic lens 122. It must be noted that the number, structure, surface shape, and other optical features of the lenses in the imaging lens 100, as well as their relative positions with other components, can be configured according to different imaging requirements, and other optical components can also be set as needed, without being limited thereto.

[0075] Furthermore, the imaging lens 100 may also include a first light-shielding plate 140. The first light-shielding plate 140 is disposed between the first plastic lens 121 and the second plastic lens 122, and has an opening (not labeled in the figure); more specifically, in the first embodiment, the first light-shielding plate 140 is disposed between the spacer ring 121a and the second plastic lens 122. Through the configuration of the first light-shielding plate 140, reflected non-imaging light can be further intercepted. This reduces unnecessary reflection paths of light between the first plastic lens 121 and the second plastic lens 122.

[0076] In the first embodiment, both the image-side surface of the first plastic lens 121 and the object-side surface of the second plastic lens 122 may be aspherical, but this disclosure is not limited thereto. The aspherical design configuration can effectively correct the optical quality of the imaging areas surrounding the image-side surface of the first plastic lens 121 and the object-side surface of the second plastic lens 122. Furthermore, it can provide a design feature of inflection points, effectively adjusting the focusing quality of the imaging light and increasing the uniformity of the thickness of the first plastic lens 121 and the second plastic lens 122, thereby preventing the plastic lens with excessive thickness variation from affecting the coating quality of the anti-reflective layer 123. This avoids excessively drastic thickness variations in the plastic lens from the center to the periphery, which could affect the injection molding quality of the plastic lens, and reduces the failure rate of the coating process.

[0077] Furthermore, the anti-reflective layer 123 may include a metal oxide layer. Specifically, the metal oxide layer can be formed using atomic layer deposition (ALD), physical vapor deposition (PVD) methods such as evaporation deposition or sputtering deposition, or chemical vapor deposition (CVD) methods such as ultra-high vacuum CVD, microwave plasma-assisted CVD, plasma-enhanced CVD, or ALD. In the first embodiment, the metal oxide layer of the anti-reflective layer 123 is composed of aluminum oxide, but this disclosure is not limited thereto.

[0078] It is worth mentioning that the minimum air gap AG1 between the off-axis portion of the image-side surface of the first plastic lens 121 and the off-axis portion of the object-side surface of the second plastic lens 122 (marked in...) Figure 1B A minimum air gap AG1 is formed on the antireflective layer 123 between the optically effective area of ​​the image-side surface of the first plastic lens 121 and the optically effective area of ​​the object-side surface of the second plastic lens 122, and between the off-axis portion of the image-side surface of the first plastic lens 121 and the off-axis portion of the object-side surface of the second plastic lens 122. Through the arrangement of the first plastic lens 121 and the second plastic lens 122, the reflection intensity of light that has been reflected once or twice can be directly reduced, avoiding the need for multiple reflections to reduce the intensity of the reflected light. This effectively reduces the intensity of light reflection within the narrow air gap 120.

[0079] Please refer to Figure 1B Its drawing is based on Figure 1A A schematic diagram of the parameters of the imaging lens 100 in the first embodiment. (See diagram below.) Figure 1B As shown, the minimum air gap between the off-axis portion of the image-side surface of the first plastic lens 121 and the off-axis portion of the object-side surface of the second plastic lens 122 is AG1; the peripheral air gap between the edge of the optically effective area of ​​the image-side surface of the first plastic lens 121 and the edge of the optically effective area of ​​the object-side surface of the second plastic lens 122 is AG2; the center distance from the near-optical axis portion of the image-side surface of the first plastic lens 121 to the near-optical axis portion of the object-side surface of the second plastic lens 122 is d; the diameter of the optically effective area of ​​the image-side surface of the first plastic lens 121 is ID1; the diameter of the optically effective area of ​​the object-side surface of the second plastic lens 122 is OD2; and the diameter of the opening of the first light-shielding plate 140 is SD1. These parameters satisfy the conditions in Table 1 below.

[0080]

[0081] Please refer to Figure 5 Its drawing is based on Figure 1A The relationship between reflectivity and wavelength of the antireflective layer 123 in the first embodiment is shown in the diagram. Figure 5 As shown, the solid line segment C represents the reflectivity of the antireflective layer 123 at the center of the optically effective region, and the dashed line segment P represents the reflectivity of the antireflective layer 123 at the edge of the optically effective region. This effectively reduces unwanted surface reflections in the visible light band, increasing the breadth of stray light elimination.

[0082] <Second Embodiment>

[0083] Please refer to Figure 2A The diagram illustrates an imaging lens 200 according to the second embodiment of this disclosure. Figure 2A As can be seen, the imaging lens 200 has an optical axis X and includes multiple lenses 211 and 212, a plastic lens group (not labeled in the figure), and a lens barrel 230. Lenses 211 and 212 and the plastic lens group are all disposed in the lens barrel 230. The plastic lens group includes two plastic lenses (not labeled in the figure) and an anti-reflection layer 223. The two plastic lenses are, in sequence from the object side to the image side along the optical axis X, a first plastic lens 221 and a second plastic lens 222. The anti-reflection layer 223 has a nanostructure and is disposed on at least one of the image-side surface of the first plastic lens 221 and the object-side surface of the second plastic lens 222.

[0084] By forming an air gap 220 between the image-side surface of the first plastic lens 221 and the object-side surface of the second plastic lens 222 to achieve a low-reflection effect, and by providing at least one of the plastic lens surfaces on both sides of the air gap 220 with a nanostructured anti-reflection layer 223 (in the second embodiment, the anti-reflection layer 223 is provided on the image-side surface of the first plastic lens 221 on the object side of the air gap 220), the plastic lens group can significantly reduce the high-intensity reflected light inside the narrow air gap 220. This allows the resolution level of the imaging lens 200 to be less limited by excessively high lens surface reflectivity, thereby increasing the margin for optical design. In this way, the resolution performance of the imaging lens 200 can be improved.

[0085] like Figure 2A As shown, the imaging lens 200 includes two lenses 211 and 212, which are sequentially arranged along the optical axis X from the object side to the image side on the object side of the plastic lens group (i.e., the object side of the first plastic lens 221). More specifically, the imaging lens 200 may further include two spacer rings 212a and 221a, a light-shielding plate 212b, and a fixing ring 222a. The spacer ring 212a is located between the lens 212 and the first plastic lens 221, the light-shielding plate 212b is located between the spacer ring 212a and the first plastic lens 221, the spacer ring 221a is located between the first plastic lens 221 and the second plastic lens 222, and the fixing ring 222a is disposed on the image side of the second plastic lens 222. It must be noted that the number, structure, surface shape, and other optical characteristics of the lenses in the imaging lens 200, as well as their relative positions with other components, can be configured according to different imaging requirements, and other optical components can also be added as needed, without limitation.

[0086] Furthermore, the imaging lens 200 may also include a first light-shielding plate 240. The first light-shielding plate 240 is disposed between the first plastic lens 221 and the second plastic lens 222, and has an opening (not labeled in the figure); more specifically, in the second embodiment, the first light-shielding plate 240 is disposed between the spacer ring 221a and the second plastic lens 222. Through the arrangement of the first light-shielding plate 240, reflected non-imaging light rays can be further intercepted. This reduces unnecessary reflection paths of light between the first plastic lens 221 and the second plastic lens 222.

[0087] In the second embodiment, both the image-side surface of the first plastic lens 221 and the object-side surface of the second plastic lens 222 are aspherical, but this disclosure is not limited thereto. The aspherical design effectively corrects the optical quality of the imaging areas surrounding the image-side surface of the first plastic lens 221 and the object-side surface of the second plastic lens 222. Furthermore, it provides a curvature point design feature, effectively adjusting the focusing quality of the imaging light and increasing the uniformity of the thickness of the first plastic lens 221 and the second plastic lens 222, thereby preventing excessive thickness variations in the plastic lens from affecting the coating quality of the anti-reflective layer 223. This avoids excessively drastic thickness variations from the center to the periphery of the plastic lens, which could affect the injection molding quality of the plastic lens, and reduces the failure rate of the coating process.

[0088] Furthermore, the anti-reflective layer 223 may comprise a metal oxide layer and a silicon oxide layer. Specifically, the metal oxide layer and silicon oxide layer can be formed using atomic layer deposition (ALD), physical vapor deposition (PVD) methods such as evaporation deposition or sputtering deposition, or chemical vapor deposition (CVD) methods such as ultra-high vacuum CVD, microwave plasma-assisted CVD, plasma-enhanced CVD, or ALD. In the second embodiment, the metal oxide layer is composed of aluminum oxide. Specifically, the metal oxide layer is disposed on the image-side surface of the first plastic lens 221, and the silicon oxide layer is disposed between the metal oxide layer and the image-side surface of the first plastic lens 221, but this disclosure is not limited thereto. Thus, by configuring different oxide layers, the reflectivity of the anti-reflective layer can be adjusted as needed.

[0089] It is worth mentioning that the minimum air gap AG1 between the off-axis point of the image-side surface of the first plastic lens 221 and the off-axis point of the object-side surface of the second plastic lens 222 (marked in...) Figure 2B A minimum air gap AG1 is formed on the antireflective layer 223 between the optically effective area of ​​the image-side surface of the first plastic lens 221 and the optically effective area of ​​the object-side surface of the second plastic lens 222, and between the off-axis locations of the image-side surface of the first plastic lens 221 and the object-side surface of the second plastic lens 222. Through the arrangement of the first plastic lens 221 and the second plastic lens 222, the reflection intensity of light that has been reflected once or twice can be directly reduced, avoiding the need for multiple reflections to reduce the intensity of the reflected light. This effectively reduces the intensity of light reflection within narrow air gaps.

[0090] Please refer to Figure 2B Its drawing is based on Figure 2A A schematic diagram of the parameters of the imaging lens 200 in the second embodiment. (See diagram below.) Figure 2BAs shown, the minimum air gap between the off-axis portion of the image-side surface of the first plastic lens 221 and the off-axis portion of the object-side surface of the second plastic lens 222 is AG1; the peripheral air gap between the edge of the optically effective area of ​​the image-side surface of the first plastic lens 221 and the edge of the optically effective area of ​​the object-side surface of the second plastic lens 222 is AG2; the center distance from the near-optical axis portion of the image-side surface of the first plastic lens 221 to the near-optical axis portion of the object-side surface of the second plastic lens 222 is d; the diameter of the optically effective area of ​​the image-side surface of the first plastic lens 221 is ID1; the diameter of the optically effective area of ​​the object-side surface of the second plastic lens 222 is OD2; and the diameter of the opening of the first light-shielding plate 240 is SD1. These parameters satisfy the conditions in Table 2 below.

[0091]

[0092] Please refer to Figure 6 Its drawing is based on Figure 2A The diagram showing the relationship between the reflectivity and wavelength of the antireflective layer 223 in the second embodiment is shown. Figure 6 As shown, the solid line segment C represents the reflectivity of the anti-reflection layer 223 at the center of the optically effective area, and the dashed line segment P represents the reflectivity of the anti-reflection layer 223 at the edge of the optically effective area. This effectively reduces unwanted surface reflections in the visible light band, increasing the breadth of stray light elimination. Furthermore, by further attenuating reflected light in the infrared band, the reflection of infrared light emitted by the image light source during actual shooting can be reduced.

[0093] <Third Embodiment>

[0094] Please refer to Figure 3A The diagram illustrates an imaging lens 300 according to the third embodiment of this disclosure. Figure 3A As can be seen, the imaging lens 300 has an optical axis X and includes multiple lenses 311 and 312, a plastic lens group (not labeled in the figure), and a lens barrel 330. Lenses 311 and 312 and the plastic lens group are all disposed in the lens barrel 330. The plastic lens group includes two plastic lenses (not labeled in the figure) and two anti-reflection layers 323a and 323b. In detail, the two plastic lenses are, in sequence from the object side to the image side along the optical axis X, a first plastic lens 321 and a second plastic lens 322. The anti-reflection layers 323a and 323b each have a nanostructure and are respectively disposed on the image-side surface of the first plastic lens 321 and the object-side surface of the second plastic lens 322.

[0095] By forming an air gap 320 between the image-side surface of the first plastic lens 321 and the object-side surface of the second plastic lens 322 to achieve a low-reflection effect, and by providing at least one of the plastic lens surfaces on both sides of the air gap 320 with nanostructured anti-reflection layers 323a and 323b (in the third embodiment, anti-reflection layer 323a is disposed on the image-side surface of the first plastic lens 321 on the object side of the air gap 320, and anti-reflection layer 323b is disposed on the object-side surface of the second plastic lens 322 on the image side of the air gap 320), the plastic lens assembly can significantly reduce the high-intensity reflected light inside the narrow air gap 320. This allows the resolution level of the imaging lens 300 to be less limited by excessively high lens surface reflectivity, thereby increasing the margin for optical design. In this way, the resolution performance of the imaging lens 300 can be improved.

[0096] like Figure 3A As shown, the imaging lens 300 includes two lenses 311 and 312, which are sequentially arranged along the optical axis X from the object side to the image side on the object side of the plastic lens group (i.e., the object side of the first plastic lens 321). More specifically, the imaging lens 300 may further include two spacer rings 312a and 321a, a light-shielding plate 312b, and a fixing ring 322a. The spacer ring 312a is located between the lens 312 and the first plastic lens 321, the light-shielding plate 312b is located between the spacer ring 312a and the first plastic lens 321, the spacer ring 321a is located between the first plastic lens 321 and the second plastic lens 322, and the fixing ring 322a is disposed on the image side of the second plastic lens 322. It must be noted that the number, structure, surface shape, and other optical characteristics of the lenses in the imaging lens 300, as well as their relative positions with other components, can be configured according to different imaging requirements, and other optical components can also be added as needed, without limitation.

[0097] The imaging lens 300 may further include a first light-shielding plate 340. The first light-shielding plate 340 is disposed between the first plastic lens 321 and the second plastic lens 322, and has an opening (not labeled in the figure); more specifically, in the third embodiment, the first light-shielding plate 340 is disposed between the spacer ring 321a and the second plastic lens 322. Through the configuration of the first light-shielding plate 340, reflected non-imaging light rays can be further intercepted. This reduces unnecessary reflection paths of light between the first plastic lens 321 and the second plastic lens 322.

[0098] In the third embodiment, both the image-side surface of the first plastic lens 321 and the object-side surface of the second plastic lens 322 are aspherical, but this disclosure is not limited thereto. The aspherical design effectively corrects the optical quality of the imaging areas surrounding the image-side surface of the first plastic lens 321 and the object-side surface of the second plastic lens 322. Furthermore, it provides a design feature for the curvature point, effectively adjusting the focusing quality of the imaging light and increasing the uniformity of the thickness of the first plastic lens 321 and the second plastic lens 322, thereby preventing excessive thickness variations in the plastic lens from affecting the coating quality of the anti-reflective layers 323a and 323b. This avoids excessively drastic thickness variations in the plastic lens from the center to the periphery, which could affect the injection molding quality of the plastic lens and reduce the failure rate of the coating process.

[0099] Furthermore, the anti-reflective layers 323a and 323b may each comprise a metal oxide layer. Specifically, the metal oxide layer can be formed using atomic layer deposition (ALD), physical vapor deposition (PVD) methods such as evaporation deposition or sputtering deposition, or chemical vapor deposition (CVD) methods such as ultra-high vacuum CVD, microwave plasma-assisted CVD, plasma-enhanced CVD, or ALD. In the third embodiment, the metal oxide layer is composed of aluminum oxide, but this disclosure is not limited thereto.

[0100] It is worth mentioning that the minimum air gap AG1 between the off-axis point of the image-side surface of the first plastic lens 321 and the off-axis point of the object-side surface of the second plastic lens 322 (marked in...) Figure 3B The minimum air gap AG1, located between the optically effective area of ​​the image-side surface of the first plastic lens 321 and the optically effective area of ​​the object-side surface of the second plastic lens 322, and between the off-axis portion of the image-side surface of the first plastic lens 321 and the off-axis portion of the object-side surface of the second plastic lens 322, is formed between the antireflection layers 323a and 323b. Through the arrangement of the first plastic lens 321 and the second plastic lens 322, the reflection intensity of light that has undergone primary or secondary reflection can be directly reduced, avoiding the need for multiple reflections to reduce the intensity of the reflected light. This effectively reduces the intensity of light reflection within the narrow air gap.

[0101] Please refer to Figure 3B Its drawing is based on Figure 3A A schematic diagram of the parameters of the imaging lens 300 in the third embodiment is shown. Figure 3BAs shown, the minimum air gap between the off-axis portion of the image-side surface of the first plastic lens 321 and the off-axis portion of the object-side surface of the second plastic lens 322 is AG1; the peripheral air gap between the edge of the optically effective area of ​​the image-side surface of the first plastic lens 321 and the edge of the optically effective area of ​​the object-side surface of the second plastic lens 322 is AG2; the center distance from the near-optical axis portion of the image-side surface of the first plastic lens 321 to the near-optical axis portion of the object-side surface of the second plastic lens 322 is d; the diameter of the optically effective area of ​​the image-side surface of the first plastic lens 321 is ID1; the diameter of the optically effective area of ​​the object-side surface of the second plastic lens 322 is OD2; and the diameter of the opening of the first light-shielding plate 340 is SD1. These parameters satisfy the conditions in Table 3 below.

[0102]

[0103] In the third embodiment, the relationship between the reflectivity of the antireflection layer 323 and the wavelength is the same as that between the reflectivity of the antireflection layer 123 and the wavelength in the first embodiment, and will not be repeated here.

[0104] <Fourth Embodiment>

[0105] Please refer to Figure 4A The diagram illustrates an imaging lens 400 according to the fourth embodiment of this disclosure. Figure 4A As can be seen, the imaging lens 400 has an optical axis X and includes multiple lenses 411 and 412, a plastic lens group (not labeled in the figure), and a lens barrel 430. Lenses 411 and 412 and the plastic lens group are all disposed in the lens barrel 430. The plastic lens group includes two plastic lenses (not labeled in the figure) and two anti-reflection layers 423a and 423b. The two plastic lenses are, in sequence from the object side to the image side along the optical axis X, a first plastic lens 421 and a second plastic lens 422. The anti-reflection layers 423a and 423b each have a nanostructure and are respectively disposed on the image-side surface of the first plastic lens 421 and the object-side surface of the second plastic lens 422.

[0106] By forming an air gap 420 between the image-side surface of the first plastic lens 421 and the object-side surface of the second plastic lens 422 to achieve a low-reflection effect, and by providing at least one of the plastic lens surfaces on both sides of the air gap 420 with nanostructured anti-reflection layers 423a and 423b (in the fourth embodiment, anti-reflection layer 423a is provided on the image-side surface of the first plastic lens 421, and anti-reflection layer 423b is provided on the object-side surface of the second plastic lens 422), the plastic lens group can significantly reduce the high-intensity reflected light inside the narrow air gap 420, so that the resolution level of the imaging lens 400 is not limited by excessively high lens surface reflectivity, thereby increasing the margin for optical design. This improves the resolution performance of the imaging lens 400.

[0107] like Figure 4A As shown, the imaging lens 400 includes two lenses 411 and 412, which are sequentially arranged along the optical axis X from the object side to the image side on the object side of the plastic lens group (i.e., the object side of the first plastic lens 421). More specifically, the imaging lens 400 may further include two spacer rings 412a and 421a and a fixing ring 422a. The spacer ring 412a is located between the lens 412 and the first plastic lens 421, the spacer ring 421a is located between the first plastic lens 421 and the second plastic lens 422, and the fixing ring 422a is disposed on the image side of the second plastic lens 422. It must be noted that the number, structure, surface shape, and other optical characteristics of the lenses in the imaging lens 400, as well as their relative positions with other components, can be configured according to different imaging requirements, and other optical components can also be added as needed, without limitation.

[0108] The imaging lens 400 may further include a first light-shielding plate 440. The first light-shielding plate 440 is disposed between the first plastic lens 421 and the second plastic lens 422, and has an opening (not labeled); more specifically, in the fourth embodiment, the first light-shielding plate 440 is disposed between the spacer ring 421a and the second plastic lens 422. Through the configuration of the first light-shielding plate 440, reflected non-imaging light rays can be further intercepted. This reduces unnecessary reflection paths of light between the first plastic lens 421 and the second plastic lens 422.

[0109] The imaging lens 400 may further include a second light-shielding plate 450. The second light-shielding plate 450 is disposed between the first plastic lens 421 and the second plastic lens 422, and has an opening (not labeled); more specifically, in the fourth embodiment, the second light-shielding plate 450 is disposed between the first plastic lens 421 and the spacer ring 421a. Through the arrangement of the second light-shielding plate 450, a light trap can be further formed between the first plastic lens 421 and the second plastic lens 422. This allows for the capture of ghosting against a darker background.

[0110] In the fourth embodiment, both the image-side surface of the first plastic lens 421 and the object-side surface of the second plastic lens 422 are aspherical, but this disclosure is not limited thereto. The aspherical design effectively corrects the optical quality of the imaging areas surrounding the image-side surface of the first plastic lens 421 and the object-side surface of the second plastic lens 422. Furthermore, it provides a design feature for the curvature point, effectively adjusting the focusing quality of the imaging light and increasing the uniformity of the thickness of the first plastic lens 421 and the second plastic lens 422, thereby preventing excessive thickness variations in the plastic lens from affecting the coating quality of the anti-reflective layers 423a and 423b. This avoids excessively drastic thickness variations in the plastic lens from the center to the periphery, which could affect the injection molding quality of the plastic lens and reduce the failure rate of the coating process.

[0111] Furthermore, the antireflective layers 423a and 423b may each comprise a metal oxide layer and a silicon oxide layer. Specifically, the metal oxide layer and silicon oxide layer can be formed using atomic layer deposition (ALD), physical vapor deposition (PVD) methods such as evaporation deposition or sputtering deposition, or chemical vapor deposition (CVD) methods such as ultra-high vacuum CVD, microwave plasma-assisted CVD, plasma-enhanced CVD, or ALD. In the fourth embodiment, the metal oxide layer of the antireflective layers 423a and 423b is composed of aluminum oxide. The metal oxide layer of the antireflective layer 423a is disposed on the image-side surface of the first plastic lens 421, the metal oxide layer of the antireflective layer 423b is disposed on the object-side surface of the second plastic lens 422, and the silicon oxide layer of the antireflective layer 423a is disposed between the metal oxide layer of the antireflective layer 423a and the image-side surface of the first plastic lens 421, and the silicon oxide layer of the antireflective layer 423b is disposed between the metal oxide layer of the antireflective layer 423b and the object-side surface of the second plastic lens 422, but the present disclosure is not limited thereto.

[0112] It is worth mentioning that the minimum air gap AG1 between the off-axis point of the image-side surface of the first plastic lens 421 and the off-axis point of the object-side surface of the second plastic lens 422 (marked in...) Figure 4B The minimum air gap AG1, located between the optically effective area of ​​the image-side surface of the first plastic lens 421 and the optically effective area of ​​the object-side surface of the second plastic lens 422, and between the off-axis portion of the image-side surface of the first plastic lens 421 and the off-axis portion of the object-side surface of the second plastic lens 422, is formed between the antireflection layers 423a and 423b. Through the arrangement of the first plastic lens 421 and the second plastic lens 422, the reflection intensity of light that has undergone primary or secondary reflection can be directly reduced, avoiding the need for multiple reflections to reduce the intensity of the reflected light. This effectively reduces the intensity of light reflection within the narrow air gap.

[0113] Please refer to Figure 4B Its drawing is based on Figure 4A A schematic diagram of the parameters of the imaging lens 400 in the fourth embodiment. (See diagram below.) Figure 4BAs shown, the minimum air gap between the off-axis portion of the image-side surface of the first plastic lens 421 and the off-axis portion of the object-side surface of the second plastic lens 422 is AG1; the peripheral air gap between the edge of the optically effective area of ​​the image-side surface of the first plastic lens 421 and the edge of the optically effective area of ​​the object-side surface of the second plastic lens 422 is AG2; the center distance from the near-optical axis portion of the image-side surface of the first plastic lens 421 to the near-optical axis portion of the object-side surface of the second plastic lens 422 is d; the diameter of the optically effective area of ​​the image-side surface of the first plastic lens 421 is ID1; the diameter of the optically effective area of ​​the object-side surface of the second plastic lens 422 is OD2; the diameter of the opening of the first light-shielding plate 440 is SD1; and the diameter of the opening of the second light-shielding plate 450 is SD2. These parameters satisfy the conditions in Table 4 below.

[0114]

[0115] In the fourth embodiment, the relationship between the reflectivity of the antireflection layer 423 and the wavelength is the same as that between the reflectivity of the antireflection layer 223 and the wavelength in the second embodiment, and will not be repeated here.

[0116] <Fifth Embodiment>

[0117] Please refer to Figure 9A and Figure 9B ,in Figure 9A A schematic diagram of one side of the electronic device 10 according to the fifth embodiment of this disclosure is shown. Figure 9B Drawing according to Figure 9A A schematic diagram of the imaging lens 11, the electronic image sensor 12, the driving device assembly 13, and the image stabilization module 14. The electronic device 10 of the fifth embodiment is a smartphone, and includes an imaging lens 11 and an electronic image sensor 12. In the fifth embodiment, the number of imaging lenses 11 is three, and the number of electronic image sensors 12 is three, but this disclosure is not limited thereto, wherein each electronic image sensor 12 corresponds to each imaging lens 11. Furthermore, the imaging lens 11 can be any of the aforementioned first to fourth embodiments, but this disclosure is not limited thereto. This helps to meet the current market requirements for the mass production and appearance of imaging lenses mounted on them in electronic devices.

[0118] like Figure 9B As shown, the electronic device 10 may further include a drive unit group 13 and an image stabilization module 14, wherein each drive unit group 13 and each image stabilization module 14 corresponds to each imaging lens 11. The electronic device 10 uses the imaging lens 11 to focus light and capture images of the subject, and works with the drive unit group 13 to focus the image, finally imaging the image onto the electronic image sensor 12 and outputting the image data.

[0119] The drive unit assembly 13 can be an auto-focus module, and its driving method can use drive systems such as voice coil motors (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The drive unit assembly 13 enables the optical imaging lens group to achieve a better imaging position, allowing for clear images of the subject at different object distances.

[0120] The electronic device 10 can be equipped with an electronic photosensitive element 12 (such as CMOS or CCD) with good sensitivity and low noise, which is set on the imaging surface of the imaging lens 11, so as to truly present the good imaging quality of the imaging lens 11.

[0121] Furthermore, the image stabilization module 14 can be a kinetic energy sensing element such as an accelerometer, gyroscope, or Hall effect sensor. In the fifth embodiment, the image stabilization module 14 is a gyroscope, but it is not limited to this. By adjusting the changes in different axes of the imaging lens to compensate for the blurry image caused by shaking during shooting, the imaging 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.

[0122] Although the present disclosure has been described 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 lens having an optical axis, characterized in that, Comprising: A plastic lens group, comprising: Two plastic lenses, which are, in order from the object side to the image side along the optical axis, a first plastic lens and a second plastic lens; and At least one anti-reflection layer, having a nanostructure and disposed on at least one of the image-side surface of the first plastic lens and the object-side surface of the second plastic lens; Wherein, a minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is located between the optical effective regions of the image-side surface of the first plastic lens and the object-side surface of the second plastic lens. The central distance from the near-optical-axis portion of the image-side surface of the first plastic lens to the near-optical-axis portion of the object-side surface of the second plastic lens is d. The minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is AG1, and the minimum air gap is formed on the at least one anti-reflection layer. The grain height of the nanostructure is gH, which satisfies the following conditions: 65nm < gH < 600nm; and 0.001 ≤ AG1 / d < 0.

7.

2. The imaging lens as described in claim 1, characterized in that, The at least one anti-reflection layer comprises a metal oxide layer.

3. The imaging lens as described in claim 1, characterized in that, The minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is AG1. A peripheral air gap between the edge of the optical effective region of the image-side surface of the first plastic lens and the edge of the optical effective region of the object-side surface of the second plastic lens is AG2, which satisfies the following conditions: 0.01 < AG1 / AG2 < 0.

9.

4. The imaging lens as described in claim 3, characterized in that, The minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is AG1. A peripheral air gap between the edge of the optical effective region of the image-side surface of the first plastic lens and the edge of the optical effective region of the object-side surface of the second plastic lens is AG2, which satisfies the following conditions: 0.01 < AG1 / AG2 < 0.

64.

5. The imaging lens as described in claim 1, characterized in that, The minimum air gap between the off-axis portion of the image-side surface of the first plastic lens and the off-axis portion of the object-side surface of the second plastic lens is AG1, which satisfies the following conditions: 0.001mm < AG1 < 0.06mm.

6. The imaging lens as described in claim 1, characterized in that, The grain height of the nanostructure is gH, which satisfies the following conditions: 85nm < gH < 470nm.

7. The imaging lens as described in claim 1, characterized in that, The reflectance of the at least one anti-reflection layer at a wavelength of 400nm is R400, the reflectance of the at least one anti-reflection layer at a wavelength of 600nm is R600, and the reflectance of the at least one anti-reflection layer at a wavelength of 700nm is R700, which satisfies the following conditions: 0.0％<R400≤1.0％； 0.0% < R600 ≤ 1.0%; and 0.0％<R700≤1.0％。 8. The imaging lens as described in claim 7, characterized in that, The reflectance of the at least one anti-reflection layer at a wavelength of 700nm is R700, which satisfies the following conditions: 0.0％<R700<0.6％。 9. The imaging lens as described in claim 1, characterized in that, Further comprising: A first light-shielding sheet, disposed between the first plastic lens and the second plastic lens, and having an opening; Wherein the diameter of the optical effective region of the image-side surface of the first plastic lens is ID1, the diameter of the optical effective region of the object-side surface of the second plastic lens is OD2, and the diameter of the opening of the first light-shielding sheet is SD1, which satisfies the following conditions: ID1 < SD1 < OD2.

10. The imaging lens as described in claim 9, characterized in that, Further comprising: A second light-shielding plate is disposed between the first plastic lens and the second plastic lens, and has an opening; The diameter of the optically effective area on the image-side surface of the first plastic lens is ID1, the diameter of the optically effective area on the object-side surface of the second plastic lens is OD2, and the diameter of the opening of the second light-shielding plate is SD2, which satisfies the following conditions: SD2 <ID1<OD2。 11. An electronic device, characterized in that, Include: The imaging lens as described in claim 1; and An electronic photosensitive element, corresponding to the imaging lens.

Images