Imaging lenses, camera modules, and electronic devices

Abstract

This disclosure provides an imaging lens. [Solution] The imaging lens includes a plurality of lenses and an adjustable aperture unit. The lenses are arranged sequentially along the optical axis. The adjustable aperture unit is mounted on the object side of the lens and includes a plurality of rotatable light-shielding sheets, which are arranged around the optical axis and form an adjustable light-passing hole. Each rotatable light-shielding sheet includes an image-side surface and an object-side surface, with the image-side surface facing the lens and the object-side surface facing the image-side surface. The image-side surface is mounted on the side of the image-side surface closer to the optical axis and includes a tapered surface that gradually approaches the object-side surface in the direction toward the optical axis. This reduces the risk of the lens being damaged by the aperture.

Description

Technical Field

[0001] The present disclosure relates to an imaging lens and a camera module, and particularly to an imaging lens and a camera module applicable to a portable electronic device.

Background Art

[0002] In recent years, with the rapid development of portable electronic devices such as smartphones and tablets, they have penetrated into the lives of modern people. Along with this, the camera modules mounted on portable electronic devices have also developed significantly. However, with the progress of technology, users are increasingly demanding higher image quality from camera modules. Therefore, the development of imaging lenses and their camera modules for improving imaging quality has become an important and urgent problem to be solved in the industry.

Summary of the Invention

[0003] The present disclosure provides an imaging lens, a camera module, and an electronic device. The imaging lens of the camera module includes a plurality of lenses and an adjustable aperture unit. The adjustable aperture unit is disposed on the object side of the lens. The adjustable aperture unit includes a plurality of rotatable light-shielding sheets, thereby enabling a camera module with a variable aperture to be realized in a small electronic device such as a mobile phone or a wristwatch.

[0004] According to an embodiment of the present disclosure, an imaging lens including a plurality of lenses and an adjustable aperture unit is provided. The lenses are sequentially arranged along the optical axis. The adjustable aperture unit is installed on the object side of the lens and includes a plurality of rotatable light-shielding sheets. The rotatable light-shielding sheets are arranged surrounding the optical axis to form an adjustable light-passing aperture. Each rotatable light-shielding sheet includes an image-side surface and an object-side surface. The image-side surface faces the lens, and the object-side surface is installed opposite to the image-side surface. The image-side surface includes a tapered surface installed on the side closer to the optical axis of the image-side surface and gradually approaching the object-side surface along the direction approaching the optical axis.

[0005] In the imaging lens according to the above embodiment, each rotatable light-shielding sheet may sequentially include a first light-shielding layer, a substrate, and a second light-shielding layer, from the image side to the object side. The first light-shielding layer forms the image-side surface. The second light-shielding layer forms the object-side surface. The side of the substrate closer to the optical axis is further from the optical axis than the first and second light-shielding layers.

[0006] In the imaging lens according to the above embodiment, the first light-shielding layer may approach the second light-shielding layer from the side of the substrate closer to the optical axis, along the direction toward the optical axis, and form a tapered surface.

[0007] In the imaging lens according to the above embodiment, the image-side surface and the object-side surface of each rotatable light-shielding sheet may be made of different materials.

[0008] In the imaging lens according to the above embodiment, the image-side surface and the object-side surface of each rotatable light-shielding sheet may have different degrees of gloss.

[0009] In the imaging lens according to the above embodiment, at least one of the rotatable light-shielding sheets may further include a covering layer that is installed on the side of the rotatable light-shielding sheet closer to the optical axis of the at least one sheet and forms a tapered surface.

[0010] In the imaging lens according to the above embodiment, the coating layer may be an absorbent coating.

[0011] In the imaging lens according to the above embodiment, the adjustable aperture unit may further include a flex-resistant sheet that is coupled to and rotates simultaneously with one of the rotatable light-shielding sheets. The flex-resistant sheet is further from the optical axis than the rotatable light-shielding sheet. In a direction parallel to the optical axis, the thickness of the flex-resistant sheet is defined as S, and the thickness of the one of the rotatable light-shielding sheets from the object-side surface to the image-side surface is defined as T, satisfying the condition 0.23 ≤ T / S ≤ 0.94.

[0012] In the imaging lens according to the above embodiment, the rotatable light-shielding sheet may include a first rotatable light-shielding sheet and a second rotatable light-shielding sheet. The second rotatable light-shielding sheet partially overlaps with the first rotatable light-shielding sheet in a direction parallel to the optical axis and is closer to the lens than the first rotatable light-shielding sheet. In a direction parallel to the optical axis, the thickness of the first rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Ti, and the thickness of the second rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Tii, satisfying the condition 0.23 ≤ Ti / Tii ≤ 0.95.

[0013] The imaging lens according to the above embodiment may further include a lens barrel surrounding the optical axis, and the lens and adjustable aperture unit are mounted in the lens barrel. One of the lenses is a first lens, which is closer to the adjustable aperture unit than the other lenses, and the first lens protrudes toward the object side from the lens barrel.

[0014] Another embodiment of the present disclosure provides a camera module including the imaging lens of the embodiment described above.

[0015] Another embodiment of the present disclosure provides an electronic device including the camera module of the above embodiment.

[0016] Another embodiment of the present disclosure provides an imaging lens comprising a plurality of lenses and an adjustable aperture unit. The lenses are arranged sequentially along the optical axis. The adjustable aperture unit is mounted on the object side of the lens and includes a plurality of rotatable light-shielding sheets, the rotatable light-shielding sheets arranged around the optical axis and forming an adjustable light-passing hole, each rotatable light-shielding sheet having an image-side surface and an object-side surface, the image-side surface facing the lens and the object-side surface facing the image-side surface. The adjustable aperture unit further includes a flex-resistant sheet coupled to one of the rotatable light-shielding sheets and further from the optical axis than the rotatable light-shielding sheet.

[0017] In the imaging lens according to the above embodiment, the thickness of the bending-resistant sheet is defined as S in a direction parallel to the optical axis, and the thickness of the rotatable light-shielding sheet from one object-side surface to the image-side surface is defined as T, satisfying the condition 0.23 ≤ T / S ≤ 0.94.

[0018] In the imaging lens according to the above embodiment, the flex-resistant sheet may include a convex structure that protrudes in a direction away from one of the rotatable light-shielding sheets.

[0019] In the imaging lens according to the above embodiment, the image-side surface and the object-side surface of each rotatable light-shielding sheet may be made of different materials.

[0020] In the imaging lens according to the above embodiment, at least one of the rotatable light-shielding sheets may sequentially include a first light-shielding layer, a substrate, and a second light-shielding layer, from the image side toward the object side. The side of the substrate closer to the optical axis is further from the optical axis than the first and second light-shielding layers.

[0021] In the imaging lens according to the above embodiment, at least one of the rotatable light-shielding sheets may further include a coating layer, and at least a portion of the coating layer is installed on the side closer to the optical axis of the substrate.

[0022] Another embodiment of the present disclosure provides an imaging lens comprising a plurality of lenses and an adjustable aperture unit. The lenses are arranged sequentially along the optical axis. The adjustable aperture unit is mounted on the object side of the lens and includes a plurality of rotatable light-shielding sheets, which are arranged around the optical axis and form an adjustable light-passing hole, and each rotatable light-shielding sheet includes an image-side surface and an object-side surface, the image-side surface facing the lens and the object-side surface facing the image-side surface. The rotatable light-shielding sheets include a first rotatable light-shielding sheet and a second rotatable light-shielding sheet. The second rotatable light-shielding sheet partially overlaps the first rotatable light-shielding sheet in a direction parallel to the optical axis and is closer to the lens than the first rotatable light-shielding sheet. In a direction parallel to the optical axis, the thickness of the first rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Ti, and the thickness of the second rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Tii, satisfying the condition 0.23 ≤ Ti / Tii ≤ 0.95.

[0023] In the imaging lens according to the above embodiment, the image-side surface and the object-side surface of each rotatable light-shielding sheet may be made of different materials.

[0024] In the imaging lens according to the above embodiment, at least one of the rotatable light-shielding sheets may sequentially include a first light-shielding layer, a substrate, and a second light-shielding layer, from the image side toward the object side. The side of the substrate closer to the optical axis is further from the optical axis than the first and second light-shielding layers.

[0025] In the imaging lens according to the above embodiment, at least one of the rotatable light-shielding sheets may further include a coating layer, and at least a portion of the coating layer is positioned on the side closer to the optical axis of the substrate.

[0026] According to another embodiment of the present disclosure, an imaging lens including a plurality of lenses and an adjustable aperture unit is provided. The lenses are sequentially arranged along the optical axis. The adjustable aperture unit is installed on the object side of the lenses and includes a plurality of rotatable light-shielding sheets. The rotatable light-shielding sheets are arranged surrounding the optical axis to form an adjustable light-passing aperture. Each rotatable light-shielding sheet includes an image-side surface and an object-side surface. The image-side surface faces the lenses, and the object-side surface is installed opposite to the image-side surface. At least one image-side surface of the rotatable light-shielding sheet includes a tapered surface that is installed on the side closer to the optical axis of the image-side surface and gradually approaches the object-side surface along the direction approaching the optical axis. In a cross-section parallel to the optical axis, the tapered surface is arc-shaped.

[0027] In the imaging lens according to the above embodiment, at least one of the rotatable light-shielding sheets may sequentially include a first light-shielding layer, a base material, and a second light-shielding layer from the image side to the object side. The first light-shielding layer forms the image-side surface. The second light-shielding layer forms the object-side surface. The side of the base material closer to the optical axis is farther from the optical axis than the first light-shielding layer and the second light-shielding layer. The first light-shielding layer approaches the second light-shielding layer along the direction approaching the optical axis from the side of the base material closer to the optical axis to form a tapered surface.

[0028] In the imaging lens according to the above embodiment, at least one of the rotatable light-shielding sheets may further include a coating layer that is installed on the side closer to the optical axis of at least one of the rotatable light-shielding sheets and forms a tapered surface.

[0029] According to other embodiments of the present disclosure, an imaging lens including a plurality of lenses and an adjustable aperture unit is provided. The lenses are sequentially arranged along the optical axis. The adjustable aperture unit is installed on the object side of the lenses and includes a plurality of rotatable light-shielding sheets. The rotatable light-shielding sheets are arranged surrounding the optical axis and form an adjustable light-passing aperture. Each rotatable light-shielding sheet includes an image-side surface and an object-side surface. The image-side surface faces the lenses, and the object-side surface is installed opposite to the image-side surface. On the side of one of the rotatable light-shielding sheets closer to the optical axis, the thickness of the rotatable light-shielding sheet gradually tapers toward the side closer to the optical axis. The one of the rotatable light-shielding sheets further includes a coating layer installed on the side closer to the optical axis of the rotatable light-shielding sheet and forming a tapered surface.

[0030] In the imaging lens according to the above embodiment, each rotatable light-shielding sheet may sequentially include a first light-shielding layer, a base material, and a second light-shielding layer from the image side toward the object side. The first light-shielding layer forms the image-side surface. The second light-shielding layer forms the object-side surface. The side of the base material closer to the optical axis is farther from the optical axis than the first light-shielding layer and the second light-shielding layer.

[0031] In the imaging lens according to the above embodiment, one of the first light-shielding layer and the second light-shielding layer may approach the other of the first light-shielding layer and the second light-shielding layer along the direction approaching the optical axis from the side of the base material closer to the optical axis.

[0032] In the imaging lens according to the above embodiment, the tapered surface may be installed on the object-side surface.

[0033] In the imaging lens according to the above embodiment, the image-side surface and the object-side surface of each rotatable light-shielding sheet may have different glossiness.

[0034] In the imaging lens according to the above embodiment, it may further include a lens barrel surrounding the optical axis, and the lenses and the adjustable aperture unit are installed in the lens barrel. One of the lenses is the first lens, which is closer to the adjustable aperture unit than the other lenses, and the first lens protrudes toward the object side beyond the lens barrel.

[0035] Other embodiments of this disclosure provide a camera module including the imaging lens of the above embodiment.

[0036] Other embodiments of this disclosure provide an electronic device including the camera module of the above embodiment. [Brief explanation of the drawing]

[0037] [Figure 1A] This is a schematic diagram showing a camera module according to the first embodiment of the present disclosure. [Figure 1B] Figure 1A is a perspective view showing the imaging lens of the camera module according to the first embodiment. [Figure 1C] Figure 1A is an exploded view showing the imaging lens of the camera module according to the first embodiment. [Figure 1D] Figure 1A is a perspective view showing a rotatable light-shielding sheet in the first embodiment according to the first embodiment. [Figure 1E] This is a partially enlarged view showing the rotatable light-shielding sheet in the first embodiment according to the first embodiment, as shown in part 1E of Figure 1A. [Figure 1F] This is a perspective view showing a rotatable light-shielding sheet in a second embodiment according to the first embodiment shown in Figure 1A. [Figure 1G] This is a partially enlarged view showing the rotatable light-shielding sheet in the second embodiment according to the first embodiment, as shown in part 1E of Figure 1A. [Figure 1H] Figure 1A is a perspective view showing a rotatable light-shielding sheet in the third embodiment according to the first embodiment. [Figure 1I] This is a partially enlarged view showing the rotatable light-shielding sheet in the third embodiment according to the first embodiment, as shown in part 1E of Figure 1A. [Figure 1J] Figure 1A is a perspective view showing a rotatable light-shielding sheet in the fourth embodiment according to the first embodiment. [Figure 1K] This is a partially enlarged view showing the rotatable light-shielding sheet in the fourth embodiment according to the first embodiment, as shown in part 1E of Figure 1A. [Figure 1L]Figure 1A is a perspective view showing a rotatable light-shielding sheet in the fifth embodiment according to the first embodiment. [Figure 1M] This is a partially enlarged view showing the rotatable light-shielding sheet in the fifth embodiment according to the first embodiment, as shown in part 1E of Figure 1A. [Figure 1N] Figure 1A is a perspective view showing a rotatable light-shielding sheet in the sixth embodiment according to the first embodiment. [Figure 10] This is a partially enlarged view showing the rotatable light-shielding sheet in the sixth embodiment according to the first embodiment, as shown in part 1E of Figure 1A. [Figure 1P] Figure 1A is a perspective view showing a rotatable light-shielding sheet in the seventh embodiment according to the first embodiment. [Figure 1Q] This is a partially enlarged view showing the rotatable light-shielding sheet in the seventh embodiment according to the first embodiment, part 1E of Figure 1A. [Figure 2A] This is a schematic diagram showing a camera module according to a second embodiment of the present disclosure. [Figure 2B] Figure 2A is a perspective view showing the imaging lens of the camera module according to the second embodiment. [Figure 2C] Figure 2A is an exploded view showing the imaging lens of the camera module according to the second embodiment. [Figure 2D] Figure 2A is a partial perspective view showing the adjustable aperture unit in the first embodiment according to the second embodiment. [Figure 2E] This is a partially enlarged view showing the adjustable aperture unit in the first embodiment according to the second embodiment, as shown in part 2E of Figure 2A. [Figure 2F] Figure 2A is a partial perspective view showing the adjustable aperture unit in the second embodiment according to the second embodiment. [Figure 2G] This is a partially enlarged view showing the adjustable aperture unit in the second embodiment according to the second embodiment, as shown in part 2E of Figure 2A. [Figure 3A] This is a schematic diagram showing an electronic device according to a third embodiment of the present disclosure. [Figure 3B] Figure 3A is another schematic diagram showing an electronic device according to the third embodiment. [Figure 4] This is a schematic diagram showing an electronic device according to a fourth embodiment of the present disclosure. [Figure 5] This is a schematic diagram showing a vehicle device according to the fifth embodiment of the present disclosure. [Modes for carrying out the invention]

[0038] One embodiment of the present disclosure provides an imaging lens comprising a plurality of lenses and an adjustable aperture unit. The lenses are arranged sequentially along the optical axis. The adjustable aperture unit is mounted on the object side of the lens and includes a plurality of rotatable light-shielding sheets, which are arranged around the optical axis and form an adjustable light-passing hole, each rotatable light-shielding sheet including an image-side surface and an object-side surface, the image-side surface facing the lens and the object-side surface facing the image-side surface. The image-side surface includes a tapered surface mounted on or adjacent to the side of the image-side surface closer to the optical axis and gradually approaching the object-side surface in the direction toward the optical axis, i.e., the tapered surface gradually narrows toward the object-side surface in the direction toward the optical axis. As shown in Figure 1E, the image-side surface 131a is connected to the inner ring surface 133a on the side closer to the optical axis Z1, forming an obtuse angle. The inner ring surface 133a extends from the obtuse angle toward the object-side surface 132a, forming a tapered surface 135a. The portion of the inner ring surface 133a extending from the obtuse angle toward the object-side surface 132a can be considered part of the image-side surface 131a. This allows the aperture to be designed to be adjacent to the lens surface, enabling the implementation of a camera module with a variable aperture in small electronic devices such as mobile phones and watches. Furthermore, the contact area during collision is increased through the tapered surface, thereby reducing pressure, avoiding damage caused by the light-shielding sheet colliding with the lens, and further improving the lifespan of the camera module.

[0039] In detail, each rotatable light-shielding sheet may include, in order from the image side to the object side, a first light-shielding layer, a substrate, and a second light-shielding layer. The first light-shielding layer forms the image-side surface. The second light-shielding layer forms the object-side surface. The side of the substrate closer to the optical axis is further from the optical axis than the first and second light-shielding layers. This characteristic of the substrate being further from the optical axis than the first and second light-shielding layers weakens the hardness of the portion of the rotatable light-shielding sheet closer to the optical axis, thereby reducing the probability of the rotatable light-shielding sheet colliding with the lens.

[0040] The first light-shielding layer can form a tapered surface that approaches the second light-shielding layer along the direction toward the optical axis, starting from the side of the substrate closest to the optical axis. This prevents the edge of the first light-shielding layer from directly contacting the lens, thereby reducing the risk of lens damage.

[0041] The image-side and object-side surfaces of each rotatable light-shielding sheet may be made of different materials. This combination of different materials reduces the amplitude of vibration when the rotatable light-shielding sheet is subjected to impact, thereby reducing the risk of the rotatable light-shielding sheet colliding with the lens.

[0042] The image-side and object-side surfaces of each rotatable light-shielding sheet may have different gloss levels. This can improve the identification effect and increase assembly efficiency.

[0043] At least one of the rotatable light-shielding sheets may further include a covering layer positioned on the side of the rotatable light-shielding sheet closer to the optical axis and forming a tapered surface. This can buffer the adjustable light-passing hole from colliding with the lens, thereby preventing damage to the lens.

[0044] The coating layer may be an absorbent coating. This may further give the coating layer characteristics such as light absorption and low reflectivity, thereby reducing the occurrence of glare. The absorbent coating may contain absorbent materials such as carbon particles, or it may use a substrate with absorbent properties, thereby giving the coating layer an absorbent effect, but it is not limited to the above examples.

[0045] The adjustable aperture unit may further include a flex-resistant sheet that is coupled to and rotates simultaneously with one of the rotatable light-shielding sheets. The flex-resistant sheet is further from the optical axis than the rotatable light-shielding sheet. In a direction parallel to the optical axis, the thickness of the flex-resistant sheet is defined as S, and the thickness of the aforementioned rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as T, satisfying the condition 0.23 ≤ T / S ≤ 0.94. Furthermore, the flex-resistant sheet may be a plastic sheet and may further have one or more bending structures, thereby increasing the strength of the flex-resistant sheet. The flex-resistant sheet may also be another light-shielding sheet or a rotatable light-shielding sheet and can be coupled to the rotatable light-shielding sheet by methods such as bonding, electrostatic adsorption, or integral molding. The conditions 0.3 ≤ T / S ≤ 0.8, 0.4 ≤ T / S ≤ 0.7, and 0.23 ≤ T / S ≤ 1 can be satisfied.

[0046] The rotatable light-shielding sheet may include a first rotatable light-shielding sheet and a second rotatable light-shielding sheet. The second rotatable light-shielding sheet partially overlaps with the first rotatable light-shielding sheet in a direction parallel to the optical axis and is closer to the lens than the first rotatable light-shielding sheet. In a direction parallel to the optical axis, the thickness of the first rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Ti, and the thickness of the second rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Tii, satisfying the condition 0.23 ≤ Ti / Tii ≤ 0.95. This reduces the amplitude of the adjustable light-passing hole's movement toward the lens, thereby reducing the risk of the rotatable light-shielding sheet colliding with the lens. Furthermore, the condition 0.3 ≤ Ti / Tii ≤ 0.8 can be satisfied. Also, the condition 0.4 ≤ Ti / Tii ≤ 0.7 can be satisfied.

[0047] The imaging lens may further include a lens barrel surrounding the optical axis, and the lens and adjustable aperture unit are mounted in the lens barrel. One of the lenses is a first lens, which is closer to the adjustable aperture unit than the other lenses, and the first lens protrudes further toward the object than the lens barrel. This reduces the height and volume of the camera module with a variable aperture.

[0048] Another embodiment of the present disclosure provides a camera module including the imaging lens of the above embodiment. This allows the camera module with a variable aperture to be mounted in small electronic devices such as mobile phones and watches, by designing the aperture adjacent to the lens surface, thereby reducing the risk of the lens being damaged by the aperture.

[0049] Another embodiment of the present disclosure provides an electronic device including the camera module of the above embodiment, thereby reducing the risk of the lens being damaged by the aperture in a camera module of a small electronic device.

[0050] Another embodiment of the present disclosure provides an imaging lens comprising a plurality of lenses and an adjustable aperture unit. The lenses are arranged sequentially along the optical axis. The adjustable aperture unit is mounted on the object side of the lens and includes a plurality of rotatable light-shielding sheets, the rotatable light-shielding sheets arranged around the optical axis and forming an adjustable light-passing hole, each rotatable light-shielding sheet having an image-side surface and an object-side surface, the image-side surface facing the lens and the object-side surface facing the image-side surface. The adjustable aperture unit further includes a flex-resistant sheet coupled to one of the rotatable light-shielding sheets and further located further from the optical axis than the rotatable light-shielding sheet. Furthermore, the flex-resistant sheet may be a plastic sheet and may further have one or more bending structures, thereby increasing the strength of the flex-resistant sheet, and the flex-resistant sheet may be another light-shielding sheet or a rotatable light-shielding sheet and may be coupled to the rotatable light-shielding sheet by methods such as bonding, electrostatic adsorption, or integral molding.

[0051] In detail, the thickness of the flexure-resistant sheet is defined as S in the direction parallel to the optical axis, and the thickness of the rotatable light-shielding sheet from one object-side surface to the image-side surface is defined as T, satisfying the condition 0.23 ≤ T / S ≤ 0.94. This increases the strength of the flexure-resistant sheet and the rotatable light-shielding sheet that are bonded together. Furthermore, the conditions 0.3 ≤ T / S ≤ 0.8 can be satisfied. Additionally, the conditions 0.4 ≤ T / S ≤ 0.7 can be satisfied. Furthermore, the condition 0.23 ≤ T / S ≤ 1 can be satisfied.

[0052] In a direction parallel to the optical axis, the thickness of the rotatable light-shielding sheet from one object-side surface to the image-side surface is defined as T, and the condition 0.01 mm ≤ T ≤ 0.12 mm can be satisfied. This allows a rotatable light-shielding sheet of appropriate thickness to provide desirable light-shielding quality. Furthermore, the conditions 0.015 mm ≤ T ≤ 0.10 mm can be satisfied. Also, the conditions 0.02 mm ≤ T ≤ 0.08 mm can be satisfied. Also, the conditions 0.01 mm ≤ T ≤ 0.06 mm can be satisfied. Also, the conditions 0.02 mm ≤ T ≤ 0.04 mm can be satisfied.

[0053] The flex-resistant sheet may include a convex structure that protrudes away from one of the rotatable light-shielding sheets. This reduces the height and volume of the camera module having a variable aperture.

[0054] The image-side and object-side surfaces of each rotatable light-shielding sheet may be made of different materials. This combination of different materials reduces the amplitude of vibration when the rotatable light-shielding sheet is subjected to impact, thereby reducing the risk of the rotatable light-shielding sheet colliding with the lens.

[0055] At least one of the rotatable light-shielding sheets may include, in order from the image side to the object side, a first light-shielding layer, a substrate, and a second light-shielding layer. The side of the substrate closer to the optical axis is further from the optical axis than the first and second light-shielding layers. This feature, where the substrate is further from the optical axis than the first and second light-shielding layers, weakens the hardness of the portion of the rotatable light-shielding sheet closer to the optical axis, thereby reducing the probability of the rotatable light-shielding sheet colliding with the lens.

[0056] At least one of the rotatable light-shielding sheets may further include a coating layer, at least a portion of which is positioned on the side of the substrate closer to the optical axis. This helps to buffer the adjustable light-passing holes from colliding with the lens, thereby preventing damage to the lens.

[0057] Another embodiment of the present disclosure provides an imaging lens comprising a plurality of lenses and an adjustable aperture unit. The lenses are arranged sequentially along the optical axis. The adjustable aperture unit is mounted on the object side of the lens and includes a plurality of rotatable light-shielding sheets, which are arranged around the optical axis and form an adjustable light-passing hole, and each rotatable light-shielding sheet includes an image-side surface and an object-side surface, the image-side surface facing the lens and the object-side surface facing the image-side surface. The rotatable light-shielding sheets include a first rotatable light-shielding sheet and a second rotatable light-shielding sheet. The second rotatable light-shielding sheet partially overlaps the first rotatable light-shielding sheet in a direction parallel to the optical axis and is closer to the lens than the first rotatable light-shielding sheet. In a direction parallel to the optical axis, the thickness of the first rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Ti, and the thickness of the second rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Tii, satisfying the condition 0.23 ≤ Ti / Tii ≤ 0.95. This reduces the amplitude of the adjustable light-passing hole's movement toward the lens, thereby reducing the risk of the rotatable light-shielding sheet colliding with the lens. Furthermore, the condition 0.3 ≤ Ti / Tii ≤ 0.8 can be satisfied. Additionally, the condition 0.4 ≤ Ti / Tii ≤ 0.7 can be satisfied.

[0058] In detail, the image-side surface and object-side surface of each rotatable light-shielding sheet may be made of different materials. This combination of different materials reduces the amplitude of vibration when the rotatable light-shielding sheet is subjected to impact, thereby reducing the risk of the rotatable light-shielding sheet colliding with the lens.

[0059] At least one of the rotatable light-shielding sheets may include, in order from the image side to the object side, a first light-shielding layer, a substrate, and a second light-shielding layer. The side of the substrate closer to the optical axis is further from the optical axis than the first and second light-shielding layers. This feature, where the substrate is further from the optical axis than the first and second light-shielding layers, weakens the hardness of the portion of the rotatable light-shielding sheet closer to the optical axis, thereby reducing the probability of the rotatable light-shielding sheet colliding with the lens.

[0060] At least one of the rotatable light-shielding sheets may further include a coating layer, at least a portion of which is positioned on the side of the substrate closer to the optical axis. This helps to buffer the adjustable light-passing holes from colliding with the lens, thereby preventing damage to the lens.

[0061] Another embodiment of the present disclosure provides an imaging lens comprising a plurality of lenses and an adjustable aperture unit. The lenses are arranged sequentially along the optical axis. The adjustable aperture unit is mounted on the object side of the lens and includes a plurality of rotatable light-shielding sheets, which are arranged around the optical axis and form an adjustable light-passing hole, each rotatable light-shielding sheet including an image-side surface and an object-side surface, the image-side surface facing the lens and the object-side surface facing the image-side surface. At least one image-side surface of the rotatable light-shielding sheet is mounted on the side of the image-side surface closer to the optical axis and includes a tapered surface that gradually approaches the object-side surface in the direction toward the optical axis. In a cross section parallel to the optical axis, the tapered surface is arc-shaped. This helps to maintain the shape of the adjustable light-passing hole and improves optical quality.

[0062] More specifically, at least one of the rotatable light-shielding sheets may include, in order from the image side to the object side, a first light-shielding layer, a substrate, and a second light-shielding layer. The first light-shielding layer forms the image-side surface. The second light-shielding layer forms the object-side surface. The side of the substrate closer to the optical axis is further from the optical axis than the first and second light-shielding layers. The first light-shielding layer tapers towards the second light-shielding layer along the direction toward the optical axis, starting from the side of the substrate closer to the optical axis. This prevents the edge of the first light-shielding layer from directly contacting the lens, thereby reducing the risk of lens damage.

[0063] The at least one of the rotatable light-shielding sheets may further include a covering layer positioned on the side of the at least one rotatable light-shielding sheet closer to the optical axis and forming a tapered surface. This can buffer the adjustable light-passing hole from colliding with the lens, thereby preventing damage to the lens.

[0064] Another embodiment of the present disclosure provides an imaging lens comprising a plurality of lenses and an adjustable aperture unit. The lenses are arranged sequentially along the optical axis. The adjustable aperture unit is mounted on the object side of the lens and includes a plurality of rotatable light-shielding sheets, which are arranged around the optical axis and form an adjustable light-passing hole, each rotatable light-shielding sheet having an image-side surface and an object-side surface, the image-side surface facing the lens and the object-side surface facing the image-side surface. On one (or at least one) of the rotatable light-shielding sheets, the thickness of the rotatable light-shielding sheet gradually decreases toward the optical axis. The one of the rotatable light-shielding sheets further includes a coating layer mounted on the side of the rotatable light-shielding sheet toward the optical axis and forming a tapered surface. This can prevent damage to the lens by buffering the adjustable light-passing hole from colliding with the lens.

[0065] Specifically, each rotatable light-shielding sheet may include, in order from the image side to the object side, a first light-shielding layer, a substrate, and a second light-shielding layer. The first light-shielding layer forms the image-side surface. The second light-shielding layer forms the object-side surface. The side of the substrate closer to the optical axis is further from the optical axis than the first and second light-shielding layers. This characteristic of the substrate being further from the optical axis than the first and second light-shielding layers reduces the hardness of the side of the rotatable light-shielding sheet closer to the optical axis, thereby reducing the probability of the rotatable light-shielding sheet scratching the lens.

[0066] One of the first and second light-shielding layers may approach the other of the first and second light-shielding layers from the side of the substrate closer to the optical axis, in a direction toward the optical axis. This prevents damage caused by the light-shielding sheet colliding with the lens and maintains the light-shielding effect.

[0067] The tapered surface may be placed on the object-side surface. This prevents damage caused by the light-shielding sheet colliding with the lens and can serve as an identification feature during assembly.

[0068] The image-side and object-side surfaces of each rotatable light-shielding sheet may have different gloss levels. This can improve the identification effect and increase assembly efficiency.

[0069] The imaging lens may further include a lens barrel surrounding the optical axis, with the lens and adjustable aperture unit mounted in the lens barrel. One of the lenses is a first lens, which is closer to the adjustable aperture unit than the other lenses, and the first lens protrudes further toward the object than the lens barrel. This reduces the height and volume of the camera module with an adjustable aperture.

[0070] Other embodiments of this disclosure provide a camera module including the imaging lens of the above embodiment. This enables the camera module having an adjustable aperture unit to be mounted in small electronic devices such as smartphones and smartwatches, as the risk of the lens being damaged by the aperture can be reduced by designing the aperture to be close to the lens surface.

[0071] Other embodiments of this disclosure provide an electronic device including the camera module of the above embodiment, which helps reduce the risk of lens damage due to aperture in a camera module of a small electronic device.

[0072] <First Embodiment>

[0073] Figure 1A is a schematic diagram showing a camera module 100 in a first embodiment of the present disclosure. Please refer to Figure 1A. The camera module 100 includes an imaging lens 101 and an electronic photosensitive element 109, the electronic photosensitive element 109 being mounted on the imaging plane 190 of the imaging lens 101. The imaging lens 101 includes a plurality of lenses (i.e., a first lens 111 and a plurality of lenses 112), an adjustable aperture unit 120, and a filter 180. The lenses are arranged sequentially along the optical axis Z1, the adjustable aperture unit 120 is mounted on the object side of the lens, and the filter 180 is mounted on the image side of the lens.

[0074] Figure 1B is a perspective view showing the imaging lens 101 of the camera module 100 according to the first embodiment of Figure 1A, and Figure 1C is an exploded view showing the imaging lens 101 of the camera module 100 according to the first embodiment of Figure 1A. Please refer to Figures 1A to 1C. The adjustable aperture unit 120 includes a plurality of rotatable light-shielding sheets 130, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 134, and each rotatable light-shielding sheet 130 includes an image-side surface, an object-side surface 132 and an inner ring surface 133, the image-side surface facing the lens, the object-side surface 132 facing the image-side surface, and the inner ring surface 133 connecting the image-side surface and the object-side surface 132.

[0075] The image-side surface may include a tapered surface (as shown in the drawings of the first to fifth embodiments of the first embodiment) that is located on the side of the image-side surface closer to the optical axis Z1 and gradually approaches the object-side surface 132 in the direction approaching the optical axis Z1. Alternatively, the tapered surface (as shown in the drawings of the sixth and seventh embodiments of the first embodiment) may be located on the object-side surface 132.

[0076] The imaging lens 101 further includes a lens barrel 117 surrounding the optical axis Z1, and the lens and the adjustable aperture unit 120 are connected and installed inside and outside the lens barrel 117, respectively. One of the lenses is the first lens 111, which is closer to the adjustable aperture unit 120 (particularly closer to the rotatable light-shielding sheet 130 within it) than the other lens 112, and the first lens 111 protrudes towards the object side of the lens barrel 117. The adjustable aperture unit 120 further includes a drive circuit 122, fixed parts 123, 126, a swivel part 124, and rolling elements 125, all of which are installed on the side of the lens barrel 117 closer to the object side to further improve focus quality.

[0077] <First embodiment of the first embodiment>

[0078] Figure 1D is a perspective view showing the rotatable light-shielding sheet 130a of the first embodiment according to the first embodiment of Figure 1A, and Figure 1E is a partially enlarged view showing the rotatable light-shielding sheet 130a of the first embodiment according to part 1E of Figure 1A, and the specific shape of the rotatable light-shielding sheet 130a of the first embodiment according to the first embodiment is as shown in Figure 1E. Please refer to Figures 1A to 1E. The adjustable aperture unit 120 includes a plurality of rotatable light-shielding sheets 130a, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 134, and each rotatable light-shielding sheet 130a includes an image-side surface 131a, an object-side surface 132a and an inner ring surface 133a, the image-side surface 131a facing the lens, the object-side surface 132a facing the image-side surface 131a, and the inner ring surface 133a connecting the image-side surface 131a and the object-side surface 132a.

[0079] The right side of Figure 1E shows the side closer to the optical axis Z1, and the left side of Figure 1E shows the side further from the optical axis Z1. The image-side surface 131a includes a tapered surface 135a located on the side of the image-side surface 131a closer to the optical axis Z1 and gradually approaching the object-side surface 132a along the direction toward the optical axis Z1.

[0080] Each rotatable light-shielding sheet 130a includes, in order from the image side toward the object side, a first light-shielding layer 141a, a base material 143a, and a second light-shielding layer 142a. The first light-shielding layer 141a forms the image-side surface 131a. The second light-shielding layer 142a forms the object-side surface 132a. The side of the base material 143a closer to the optical axis Z1 is further from the optical axis Z1 than the first light-shielding layer 141a and the second light-shielding layer 142a, and the base material 143a forms a recessed structure 136a. The first light-shielding layer 141a approaches the second light-shielding layer 142a in the direction toward the optical axis Z1, starting from the side of the base material 143a closer to the optical axis Z1, and forms a tapered surface 135a.

[0081] The image-side surface 131a and the object-side surface 132a of each rotatable light-shielding sheet 130a may be made of different materials, and the image-side surface 131a and the object-side surface 132a of each rotatable light-shielding sheet 130a may have different degrees of gloss.

[0082] Refer to Figure 1E. In the direction parallel to the optical axis Z1, the thickness of each rotatable light-shielding sheet 130a from the object-side surface 132a to the image-side surface 131a is defined as T, and the condition T = 0.05 mm is satisfied.

[0083] <Second embodiment of the first embodiment>

[0084] Figure 1F is a perspective view showing the rotatable light-shielding sheet 130b of the second embodiment according to the first embodiment of Figure 1A, and Figure 1G is a partially enlarged view showing the rotatable light-shielding sheet 130b of the second embodiment according to part 1E of Figure 1A, and the specific shape of the rotatable light-shielding sheet 130b of the second embodiment according to the first embodiment is as shown in Figure 1G. Please refer to Figures 1A to 1C, Figure 1F and Figure 1G. The adjustable aperture unit 120 includes a plurality of rotatable light-shielding sheets 130b, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 134, and each rotatable light-shielding sheet 130b includes an image-side surface 131b, an object-side surface 132b and an inner ring surface 133b, the image-side surface 131b facing the lens, the object-side surface 132b facing the image-side surface 131b and the object-side surface 132b, and the inner ring surface 133b connecting the image-side surface 131b and the object-side surface 132b.

[0085] The right side of Figure 1G shows the side closer to the optical axis Z1, and the left side of Figure 1G shows the side further from the optical axis Z1. At least one image-side surface 131b of the rotatable light-shielding sheet 130b includes a tapered surface 135b positioned on the side of the image-side surface 131b closer to the optical axis Z1 and gradually approaching the object-side surface 132b along the direction toward the optical axis Z1. In a cross section parallel to the optical axis Z1 (as shown in Figure 1G, the normal of the cross section is perpendicular to the optical axis Z1), the tapered surface 135b is arc-shaped.

[0086] The image-side surface 131b and object-side surface 132b of each rotatable light-shielding sheet 130b may be made of different materials, and the image-side surface 131b and object-side surface 132b of each rotatable light-shielding sheet 130b may have different degrees of gloss.

[0087] Refer to Figure 1G. In a direction parallel to the optical axis Z1, the thickness of the rotatable light-shielding sheet 130b from at least one object-side surface 132b to the image-side surface 131b is defined as T, and the condition T = 0.035 mm is satisfied.

[0088] <Third embodiment of the first embodiment>

[0089] Figure 1H is a perspective view showing the rotatable light-shielding sheet 130c of the third embodiment according to the first embodiment of Figure 1A, and Figure 1I is a partially enlarged view showing the rotatable light-shielding sheet 130c of the third embodiment according to the first embodiment, as shown in part 1E of Figure 1A. The specific shape of the rotatable light-shielding sheet 130c of the third embodiment according to the first embodiment is as shown in Figure 1I. Please refer to Figures 1A to 1C, Figure 1H and Figure 1I. The adjustable aperture unit 120 includes a plurality of rotatable light-shielding sheets 130c, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 134. Each rotatable light-shielding sheet 130c includes an image-side surface 131c, an object-side surface 132c, and an inner ring surface 133c, the image-side surface 131c facing the lens, the object-side surface 132c facing the image-side surface 131c, and the inner ring surface 133c connecting the image-side surface 131c and the object-side surface 132c.

[0090] The right side of Figure 1I shows the side closer to the optical axis Z1, and the left side of Figure 1I shows the side further from the optical axis Z1. The image-side surface 131c includes a tapered surface 135c located on the side of the image-side surface 131c closer to the optical axis Z1 and gradually approaching the object-side surface 132c along the direction approaching the optical axis Z1.

[0091] Each rotatable light-shielding sheet 130c includes, in order from the image side toward the object side, a first light-shielding layer 141c, a base material 143c, and a second light-shielding layer 142c. The first light-shielding layer 141c forms the image-side surface 131c. The second light-shielding layer 142c forms the object-side surface 132c. The side of the base material 143c closer to the optical axis Z1 is further from the optical axis Z1 than the second light-shielding layer 142c, and the base material 143c forms a recessed structure 136c. The first light-shielding layer 141c approaches the second light-shielding layer 142c in the direction toward the optical axis Z1, starting from the side of the base material 143c closer to the optical axis Z1, and forms a tapered surface 135c.

[0092] The image-side surface 131c and the object-side surface 132c of each rotatable light-shielding sheet 130c may be made of different materials, and the image-side surface 131c and the object-side surface 132c of each rotatable light-shielding sheet 130c may have different degrees of gloss.

[0093] Refer to Figure 1I. In the direction parallel to the optical axis Z1, the thickness of each rotatable light-shielding sheet 130c from the object-side surface 132c to the image-side surface 131c is defined as T, and the condition T = 0.05 mm is satisfied.

[0094] <Fourth embodiment of the first embodiment>

[0095] Figure 1J is a perspective view showing the rotatable light-shielding sheet 130d of the fourth embodiment according to the first embodiment of Figure 1A, and Figure 1K is a partially enlarged view showing the rotatable light-shielding sheet 130d of the fourth embodiment according to the first embodiment of Figure 1A, and the specific shape of the rotatable light-shielding sheet 130d of the fourth embodiment according to the first embodiment is as shown in Figure 1K. Please refer to Figures 1A to 1C, Figure 1J and Figure 1K. The adjustable aperture unit 120 includes a plurality of rotatable light-shielding sheets 130d, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 134. Each rotatable light-shielding sheet 130d includes an image-side surface 131d, an object-side surface 132d, and an inner ring surface 133d. The image-side surface 131d faces the lens, the object-side surface 132d faces the image-side surface 131d, and the inner ring surface 133d connects the image-side surface 131d and the object-side surface 132d.

[0096] The right side of Figure 1K shows the side closer to the optical axis Z1, and the left side of Figure 1K shows the side further from the optical axis Z1. At least one image-side surface 131d of the rotatable light-shielding sheet 130d includes a tapered surface 135d positioned on the side of the image-side surface 131d closer to the optical axis Z1 and gradually approaching the object-side surface 132d along the direction toward the optical axis Z1. In a cross-section parallel to the optical axis Z1 (as shown in Figure 1K), the tapered surface 135d is arc-shaped.

[0097] At least one of the rotatable light-shielding sheets 130d further includes a coating layer 137d that is installed on the side of at least one of the rotatable light-shielding sheets 130d closer to the optical axis Z1 and forms a tapered surface 135d, wherein the coating layer 137d is an absorbent coating. The coating layer 137d shown in this embodiment is for illustrative purposes only to show its coating characteristics and extent, and is not based on the actual thickness of the coating layer of this disclosure.

[0098] At least one of the rotatable light-shielding sheets 130d includes, sequentially from the image side to the object side, a first light-shielding layer 141d, a base material 143d, and a second light-shielding layer 142d. The first light-shielding layer 141d forms the image-side surface 131d. The second light-shielding layer 142d forms the object-side surface 132d. The side of the base material 143d closer to the optical axis Z1 is further from the optical axis Z1 than the second light-shielding layer 142d, and the base material 143d forms a recessed structure 136d. The coating layer 137d is installed on the side of the base material 143d closer to the optical axis Z1, and at least a portion of the coating layer 137d is installed on the recessed structure 136d, and the coating layer 137d forms a tapered surface 135d.

[0099] The image-side surface 131d and the object-side surface 132d of each rotatable light-shielding sheet 130d may be made of different materials, and the image-side surface 131d and the object-side surface 132d of each rotatable light-shielding sheet 130d may have different degrees of gloss.

[0100] Refer to Figure 1K. In a direction parallel to the optical axis Z1, the thickness of the rotatable light-shielding sheet 130d from at least one object-side surface 132d to the image-side surface 131d is defined as T, and the condition T = 0.05 mm is satisfied.

[0101] <Fifth embodiment of the first embodiment>

[0102] Figure 1L is a perspective view showing the rotatable light-shielding sheet 130e of the fifth embodiment according to the first embodiment of Figure 1A, and Figure 1M is a partially enlarged view showing the rotatable light-shielding sheet 130e of the fifth embodiment according to part 1E of Figure 1A, and the specific shape of the rotatable light-shielding sheet 130e of the fifth embodiment according to the first embodiment is as shown in Figure 1M. Please refer to Figures 1A to 1C, Figure 1L and Figure 1M. The adjustable aperture unit 120 includes a plurality of rotatable light-shielding sheets 130e, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 134. Each rotatable light-shielding sheet 130e includes an image-side surface 131e, an object-side surface 132e, and an inner ring surface 133e. The image-side surface 131e faces the lens, the object-side surface 132e is positioned opposite the image-side surface 131e, and the inner ring surface 133e connects the image-side surface 131e and the object-side surface 132e.

[0103] The right side of Figure 1M shows the side closer to the optical axis Z1, and the left side of Figure 1M shows the side further from the optical axis Z1. At least one image-side surface 131e of the rotatable light-shielding sheet 130e includes a tapered surface 135e positioned on the side of the image-side surface 131e closer to the optical axis Z1 and gradually approaching the object-side surface 132e along the direction toward the optical axis Z1. In a cross-section parallel to the optical axis Z1 (as shown in Figure 1M), the tapered surface 135e is arc-shaped.

[0104] At least one of the rotatable light-shielding sheets 130e further includes a coating layer 137e which is installed on the side of at least one of the rotatable light-shielding sheets 130e closer to the optical axis Z1 and forms a tapered surface 135e, the coating layer 137e being a light-absorbing coating.

[0105] At least one of the rotatable light-shielding sheets 130e includes, in order from the image side toward the object side, a first light-shielding layer 141e, a base material 143e, and a second light-shielding layer 142e. The first light-shielding layer 141e forms the image-side surface 131e. The second light-shielding layer 142e forms the object-side surface 132e. The base material 143e has a side closer to the optical axis Z1 that is further from the optical axis Z1 than the second light-shielding layer 142e. The first light-shielding layer 141e approaches the second light-shielding layer 142e from the side of the base material 143e closer to the optical axis Z1, along the direction toward the optical axis Z1, and forms a tapered surface 135e.

[0106] The image-side surface 131e and the object-side surface 132e of each rotatable light-shielding sheet 130e may be made of different materials, and the image-side surface 131e and the object-side surface 132e of each rotatable light-shielding sheet 130e may have different degrees of gloss.

[0107] Refer to Figure 1M. In a direction parallel to the optical axis Z1, the thickness of the rotatable light-shielding sheet 130e from at least one object-side surface 132e to the image-side surface 131e is defined as T, and the condition T = 0.06 mm is satisfied.

[0108] <Sixth embodiment of the first embodiment>

[0109] Figure 1N is a perspective view showing the rotatable light-shielding sheet 130f in the sixth embodiment according to the first embodiment of Figure 1A, and Figure 10 is a partially enlarged view showing the rotatable light-shielding sheet 130f in the sixth embodiment according to the first embodiment of Figure 1A, and the specific shape of the rotatable light-shielding sheet 130f in the sixth embodiment according to the first embodiment is as shown in Figure 1O. Please refer to Figures 1A to 1C and Figures 1N to 1O. The adjustable aperture unit 120 includes a plurality of rotatable light-shielding sheets 130f, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 134. Each rotatable light-shielding sheet 130f includes an image-side surface 131f, an object-side surface 132f, and an inner ring surface 133f. The image-side surface 131f faces the lens, the object-side surface 132f is positioned opposite the image-side surface 131f, and the inner ring surface 133f connects the image-side surface 131f and the object-side surface 132f.

[0110] The right side of Figure 1O shows the side closer to the optical axis Z1, and the left side of Figure 1O shows the side further away from the optical axis Z1. On one (or at least one) of the rotatable light-shielding sheets 130f, the thickness T of the rotatable light-shielding sheet 130f gradually decreases toward the optical axis Z1. The aforementioned one of the rotatable light-shielding sheets 130f further includes a coating layer 137f that is installed on the side of the rotatable light-shielding sheet 130f closer to the optical axis Z1 and forms a tapered surface 135f. Specifically, the coating layer 137f forms an object-side surface 132f and an inner ring surface 133f, and may be an absorbent coating.

[0111] Each rotatable light-shielding sheet 130f includes, in order from the image side toward the object side, a first light-shielding layer 141f, a base material 143f, and a second light-shielding layer 142f. The first light-shielding layer 141f forms the image-side surface 131f. The second light-shielding layer 142f forms the object-side surface 132f. The side of the base material 143f closer to the optical axis Z1 is further from the optical axis Z1 than the second light-shielding layer 142f. One of the first light-shielding layer 141f and the second light-shielding layer 142f approaches the other of the first light-shielding layer 141f and the second light-shielding layer 142f in the direction toward the optical axis Z1, from the side of the base material 143f closer to the optical axis Z1.

[0112] Specifically, the tapered surface 135f of the second light-shielding layer 142f approaches the first light-shielding layer 141f from the side of the base material 143f that is closer to the optical axis Z1, and is positioned on the object-side surface 132f. In a cross-section parallel to the optical axis Z1 (as shown in Figure 1O), the tapered surface 135f is arc-shaped.

[0113] The image-side surface 131f and the object-side surface 132f of each rotatable light-shielding sheet 130f may be made of different materials, and the image-side surface 131f and the object-side surface 132f of each rotatable light-shielding sheet 130f may have different degrees of gloss.

[0114] Refer to Figure 1O. In a direction parallel to the optical axis Z1, the thickness of the rotatable light-shielding sheet 130f from at least one object-side surface 132f to the image-side surface 131f (referring to the uniform thickness excluding the tapered surface 135f) is defined as T, and the condition T = 0.05 mm is satisfied.

[0115] <Seventh embodiment of the first embodiment>

[0116] Figure 1P is a perspective view showing the rotatable light-shielding sheet 130g in the seventh embodiment according to the first embodiment of Figure 1A, and Figure 1Q is a partially enlarged view showing the rotatable light-shielding sheet 130g in the seventh embodiment according to the first embodiment of Figure 1A, and the specific shape of the rotatable light-shielding sheet 130g in the seventh embodiment according to the first embodiment is similar to that of Figure 1Q. Please refer to Figures 1A to 1C, Figure 1P and Figure 1Q. The adjustable aperture unit 120 includes a plurality of rotatable light-shielding sheets 130g, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 134. Each rotatable light-shielding sheet 130g includes an image-side surface 131g, an object-side surface 132g, and an inner ring surface 133g. The image-side surface 131g faces the lens, the object-side surface 132g is positioned opposite the image-side surface 131g, and the inner ring surface 133g connects the image-side surface 131g and the object-side surface 132g.

[0117] The right side of Figure 1Q shows the side closer to the optical axis Z1, and the left side of Figure 1Q shows the side further away from the optical axis Z1. On one (or at least one) of the rotatable light-shielding sheets 130g, the thickness T of the rotatable light-shielding sheet 130g gradually decreases toward the optical axis Z1. The aforementioned rotatable light-shielding sheet 130g further includes a coating layer 137g which is installed on the side of the rotatable light-shielding sheet 130g closer to the optical axis Z1 and forms a tapered surface 135g. Specifically, the coating layer 137g forms an image-side surface 131g, an object-side surface 132g, and an inner ring surface 133g, and may be an absorbent coating. Specifically, the tapered surface 135g is installed on the object-side surface 132g.

[0118] The image-side surface 131g and the object-side surface 132g of each rotatable light-shielding sheet 130g may be made of different materials, and the image-side surface 131g and the object-side surface 132g of each rotatable light-shielding sheet 130g may have different degrees of gloss.

[0119] Refer to Figure 1Q. In a direction parallel to the optical axis Z1, the thickness of the rotatable light-shielding sheet 130g from at least one object-side surface 132g to the image-side surface 131g (referring to the uniform thickness excluding the tapered surface 135g) is defined as T, and the condition T = 0.06 mm is satisfied.

[0120] <Second Embodiment>

[0121] Figure 2A is a schematic diagram showing a camera module 200 according to a second embodiment of the present disclosure. Please refer to Figure 2A. The camera module 200 includes an imaging lens 201 and an electronic photosensitive element 209, the electronic photosensitive element 209 being mounted on the imaging plane 290 of the imaging lens 201. The imaging lens 201 includes a plurality of lenses (i.e., a first lens 211 and a plurality of lenses 212), an adjustable aperture unit 220, and a filter 280. The lenses are arranged sequentially along the optical axis Z1, the adjustable aperture unit 220 is mounted on the object side of the lens, and the filter 280 is mounted on the image side of the lens.

[0122] Figure 2B is a perspective view showing the imaging lens 201 of the camera module 200 according to the second embodiment of Figure 2A, and Figure 2C is an exploded view showing the imaging lens 201 of the camera module 200 according to the second embodiment of Figure 2A. Please refer to Figures 2A to 2C. The adjustable aperture unit 220 includes a plurality of rotatable light-shielding sheets 230, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 234, and each rotatable light-shielding sheet 230 includes an image-side surface, an object-side surface 232 and an inner ring surface 233, the image-side surface facing the lens and the object-side surface 232 facing the image-side surface and the inner ring surface 233 connecting the image-side surface and the object-side surface 232.

[0123] The imaging lens 201 further includes a lens barrel 217 surrounding the optical axis Z1, and the lens and the adjustable aperture unit 220 are connected and installed inside and outside the lens barrel 217, respectively. One of the lenses is the first lens 211, which is closer to the adjustable aperture unit 220 (particularly closer to the rotatable light-shielding sheet 230 within it) than the other lens 212, and the first lens 211 protrudes toward the object side of the lens barrel 217. The adjustable aperture unit 220 further includes a drive circuit 222, fixed parts 223, 226, a swivel part 224, and rolling elements 225, all of which are installed on the side of the lens barrel 217 closer to the object side to further improve focus quality.

[0124] <First embodiment of the second embodiment>

[0125] Figure 2D is a partial perspective view showing the adjustable aperture unit 220 of the first embodiment according to the second embodiment of Figure 2A, and Figure 2E is a partial enlarged view showing the adjustable aperture unit 220 of the first embodiment according to the second embodiment, which is a portion of Figure 2A. The specific shape of the adjustable aperture unit 220 of the first embodiment according to the second embodiment is as shown in Figure 2E. Please refer to Figures 2A to 2E. The adjustable aperture unit 220 includes a plurality of rotatable light-shielding sheets 230a, which are arranged around the optical axis Z1 and form an adjustable light-passing hole 234. Each rotatable light-shielding sheet 230a includes an image-side surface 231a, an object-side surface 232a, and an inner ring surface 233a. The image-side surface 231a faces the lens, the object-side surface 232a faces the image-side surface 231a, and the inner ring surface 233a connects the image-side surface 231a and the object-side surface 232a.

[0126] The right side of Figure 2E shows the side closer to the optical axis Z1, and the left side of Figure 2E shows the side further away from the optical axis Z1. The adjustable aperture unit 220 further includes a flex-resistant sheet 270a that is coupled to and rotates simultaneously with one of the rotatable light-shielding sheets 230a. The flex-resistant sheet 270a is further from the optical axis Z1 than the rotatable light-shielding sheets 230a. The flex-resistant sheet 270a includes a convex structure 278a that protrudes away from the aforementioned one of the rotatable light-shielding sheets 230a. The adjustable aperture unit 220 may also include a plurality of flex-resistant sheets 270a that are coupled to and rotate simultaneously with one of the corresponding rotatable light-shielding sheets 230a.

[0127] One image-side surface 231a of the rotatable light-shielding sheet 230a is positioned on the side of the image-side surface 231a closer to the optical axis Z1 and includes a tapered surface 235a that gradually approaches the object-side surface 232a in the direction toward the optical axis Z1.

[0128] The image-side surface 231a and the object-side surface 232a of each rotatable light-shielding sheet 230a may be made of different materials, and the image-side surface 231a and the object-side surface 232a of each rotatable light-shielding sheet 230a may have different degrees of gloss.

[0129] Refer to Figure 2E. In the direction parallel to the optical axis Z1, the thickness of the flex-resistant sheet 270a is defined as S, and the thickness of the rotatable light-shielding sheet 230a from the one object-side surface 232a to the image-side surface 231a is defined as T, satisfying the conditions T=0.023mm, S=0.049mm, and T / S=0.469.

[0130] Furthermore, each rotatable light-shielding sheet 230a may sequentially include a first light-shielding layer, a substrate, and a second light-shielding layer (none of which are shown) from the image side towards the object side. The first light-shielding layer forms the image-side surface 231a. The second light-shielding layer forms the object-side surface 232a. The side of the substrate closer to the optical axis Z1 is further from the optical axis Z1 than the first and second light-shielding layers.

[0131] At least one of the rotatable light-shielding sheets 230a may further include at least one covering layer (not shown) installed on the side of the rotatable light-shielding sheet 230a closer to the at least one optical axis Z1.

[0132] <Second embodiment of the second embodiment>

[0133] Figure 2F is a partial perspective view showing the adjustable aperture unit 220 of the second embodiment according to the second embodiment shown in Figure 2A, and Figure 2G is a partial enlarged view showing the adjustable aperture unit 220 of the second embodiment according to the second embodiment, as shown in part 2E of Figure 2A. The specific shape of the adjustable aperture unit 220 of the second embodiment according to the second embodiment is as shown in Figure 2G. Please refer to Figures 2A to 2C, 2F, and 2G. The adjustable aperture unit 220 includes a plurality of rotatable light-shielding sheets 230, the rotatable light-shielding sheets 230 include a plurality of first rotatable light-shielding sheets 260b and a plurality of second rotatable light-shielding sheets 250b, the first rotatable light-shielding sheets 260b and the second rotatable light-shielding sheets 250b are arranged alternately around the optical axis Z1 to form an adjustable light-passing hole 234. Each first rotatable light-shielding sheet 260b includes an image-side surface 261b, an object-side surface 262b, and an inner ring surface 263b, wherein the image-side surface 261b faces the lens, the object-side surface 262b is positioned opposite the image-side surface 261b, and the inner ring surface 263b connects the image-side surface 261b and the object-side surface 262b. Each second rotatable light-shielding sheet 250b includes an image-side surface 251b, an object-side surface 252b, and an inner ring surface 253b, wherein the image-side surface 251b faces the lens, the object-side surface 252b is positioned opposite the image-side surface 251b, and the inner ring surface 253b connects the image-side surface 251b and the object-side surface 252b.

[0134] The second rotatable light-shielding sheet 250b partially overlaps with the first rotatable light-shielding sheet 260b in a direction parallel to the optical axis Z1, and is closer to the lens than the first rotatable light-shielding sheet 260b.

[0135] Each first rotatable light-shielding sheet 260b has an image-side surface 261b that is positioned on the side of the image-side surface 261b closer to the optical axis Z1 and includes a tapered surface 265b that gradually approaches the object-side surface 262b in the direction approaching the optical axis Z1. Each second rotatable light-shielding sheet 250b has an image-side surface 251b that is positioned on the side of the image-side surface 251b closer to the optical axis Z1 and includes a tapered surface 255b that gradually approaches the object-side surface 252b in the direction approaching the optical axis Z1.

[0136] The image-side surface 261b and object-side surface 262b of each first rotatable light-shielding sheet 260b may be made of different materials, and the image-side surface 251b and object-side surface 252b of each second rotatable light-shielding sheet 250b may be made of different materials.

[0137] Refer to Figure 2G. In the direction parallel to the optical axis Z1, the thickness of the first rotatable light-shielding sheet 260b from the object-side surface 262b to the image-side surface 261b is defined as Ti, and the thickness of the second rotatable light-shielding sheet 250b from the object-side surface 252b to the image-side surface 251b is defined as Tii, satisfying the conditions Ti = 0.033 mm, Tii = 0.05 mm, and Ti / Tii = 0.66.

[0138] Furthermore, at least one of the first rotatable light-shielding sheets 260b may sequentially include a first light-shielding layer, a substrate, and a second light-shielding layer (none of which are shown) from the image side toward the object side, the first light-shielding layer forming the image-side surface 261b, the second light-shielding layer forming the object-side surface 262b, and the side of the substrate closer to the optical axis Z1 being further from the optical axis Z1 than the first and second light-shielding layers. At least one of the second rotatable light-shielding sheets 250b may sequentially include a first light-shielding layer, a substrate, and a second light-shielding layer (none of which are shown) from the image side toward the object side, the first light-shielding layer forming the image-side surface 251b, the second light-shielding layer forming the object-side surface 252b, and the side of the substrate closer to the optical axis Z1 being further from the optical axis Z1 than the first and second light-shielding layers.

[0139] At least one of the first rotatable light-shielding sheets 260b may further include at least one coating layer (not shown) installed on the side of the first rotatable light-shielding sheet 260b closer to the at least one optical axis Z1. At least one of the second rotatable light-shielding sheets 250b may further include at least one coating layer (not shown) installed on the side of the second rotatable light-shielding sheet 250b closer to the at least one optical axis Z1.

[0140] <Third Embodiment>

[0141] Please refer to Figures 3A and 3B. Figure 3A is a schematic diagram showing an electronic device 300 according to a third embodiment of the present disclosure, and Figure 3B is another schematic diagram showing the electronic device 300 according to the third embodiment of Figure 3A. As can be seen from Figures 3A and 3B, the electronic device 300 is a smartphone and includes a plurality of camera modules and an imaging control interface 301. Furthermore, the camera modules include a front camera module 311, a TOF module (Time-Of-Flight) 312, a wide-angle camera module 320, an ultra-wide-angle camera module 330, a macro camera module 340, and a telephoto camera module 350, and the imaging control interface 301 is a touchscreen, but is not limited thereto. Specifically, each camera module may be a camera module from any embodiment of the first to second embodiments, but the present disclosure is not limited thereto.

[0142] The front camera module 311 and the TOF module 312 are located on the same side as the imaging control interface 301, and an indicator lamp 302 may be installed between the front camera module 311 and the TOF module 312. The imaging control interface 301 may optionally include an image playback button 3011, a camera module switching button 3012, and an integrated menu button 3013, which contribute to switching and operating camera modules and confirming the shooting results. The electronic device 300 may also include a zoom control button 303 and a focus shooting button 304, which are arranged in the form of mechanical buttons on the frame of the electronic device 300 to optimize user operability.

[0143] Furthermore, the electronic device 300 may further include an electronic element substrate 370, on which electronic elements such as electronic elements 371 and connectors 372 may be installed according to the imaging needs. A single-chip system may be installed on the electronic element substrate 370, and an image software processor, image signal processor, positioning device, transmission signal processor, gyroscope, memory unit, random access memory, etc., may all be integrated therein.

[0144] To improve shooting quality, the electronic device 300 may further include a light-emitting element 381 and an auxiliary focus element 382. The light-emitting element 381 may be a flash element, and the auxiliary focus element 382 may be an infrared rangefinder, a laser focus module, etc. This contributes to the performance of the autofocus function and optical image stabilization component in the camera module configuration of the electronic device 300, resulting in good image quality and enabling the electronic device 300 according to this disclosure to have shooting functions in various modes such as optimized selfie, low-light HDR (High Dynamic Range), and high-resolution 4K (4K Resolution) recording.

[0145] <Fourth Embodiment>

[0146] Please refer to Figure 4. Figure 4 is a schematic diagram showing an electronic device 400 according to a fourth embodiment of the present disclosure. As can be seen from Figure 4, the electronic device 400 is a drone and includes a side camera module 410 and a front camera module 420, each of which may be a camera module from any embodiment of the first to second embodiments, but the present disclosure is not limited thereto.

[0147] <Fifth Embodiment>

[0148] Please refer to Figure 5. Figure 5 is a schematic diagram showing a vehicle device 500 according to a fifth embodiment of the present disclosure. As can be seen from Figure 5, the vehicle device 500 includes a front camera module 510, a rear camera module 520, and a side camera module 530, each of which may be a camera module from any embodiment of the first to second embodiments, but the present disclosure is not limited thereto.

[0149] Although this disclosure is disclosed by embodiments and examples as described above, these embodiments and examples are not limiting to this disclosure, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be as defined by the claims appended below. [Explanation of Symbols]

[0150] 100, 200: Camera Module 101, 201: Imaging lens 109, 209: Electronic photosensitive element 111, 211: First lens 112, 212: Lens 117, 217: Telescope tube 120, 220: Adjustable aperture unit 122, 222: Drive circuit 123, 126, 223, 226: Fixed part 124, 224: Swivel section 125, 225: Rolling elements 130, 130a, 130b, 130c, 130d, 130e, 130f, 130g, 230, 230a: Rotatable light-blocking sheets 131a, 131b, 131c, 131d, 131e, 131f, 131g, 231a, 251b, 261b: Image side surface 132, 132a, 132b, 132c, 132d, 132e, 132f, 132g, 232, 232a, 252b, 262b: Object side surface 133, 133a, 133b, 133c, 133d, 133e, 133f, 133g, 233, 233a, 253b, 263b: Inner ring surface 134, 234: Adjustable light hole 135a, 135b, 135c, 135d, 135e, 135f, 135g, 235a, 255b, 265b: Tapered surface 136a, 136c, 136d, 136f: Recessed structure 137d, 137e, 137f, 137g::Covering layer 141a, 141b, 141c, 141d, 141e, 141f: first light shielding layer 142a, 142b, 142c, 142d, 142e, 142f: second light shielding layer 143a, 143c, 143d, 143e, 143f: Base material 180, 280: Filter 190, 290: Image plane 250b: Second-rotation movable light-blocking sheet 260b: First-rotation movable light-blocking sheet 270a: Flexible sheet 278a: Convex structure 300, 400: Electronic equipment 301: Imaging control interface 3011: Image playback button 3012: Camera module switch button 3013: Integrated menu button 302: Indicator Lamp 303: Zoom control button 304: Focus shooting button 311: Front camera module 312: TOF module 320: Wide-angle camera module 330: Ultra-wide-angle camera module 340: Micro-range camera module 350: Telephoto camera module 370: Electronic component substrate 371: Electronic elements 372: Connector 381: Light-emitting element 382: Auxiliary focus element 410, 530: Side camera module 420, 510: Front camera module 500: Vehicle equipment 520: Rear camera module S, T, Ti, Tii: thickness Z1: Optical axis

Claims

1. Multiple lenses arranged sequentially along the optical axis, An adjustable aperture unit installed on the object side of the plurality of lenses, comprising a plurality of rotatable light-shielding sheets, wherein the plurality of rotatable light-shielding sheets are arranged around the optical axis and form an adjustable light-passing hole, and each of the rotatable light-shielding sheets comprises an image-side surface and an object-side surface, wherein the image-side surface faces the plurality of lenses and the object-side surface faces the image-side surface, Includes, The image-side surface includes an imaging lens that is positioned on the side of the image-side surface closer to the optical axis and includes a tapered surface that gradually approaches the object-side surface in a direction approaching the optical axis.

2. Each of the aforementioned rotatable light-shielding sheets is sequentially positioned from the image side toward the object side. The first light-shielding layer forming the image-side surface, Substrate and A second light-shielding layer forming the object-side surface, Includes, The imaging lens according to claim 1, wherein the side of the substrate closer to the optical axis is further from the optical axis than the first light-shielding layer and the second light-shielding layer.

3. The imaging lens according to claim 2, wherein the first light-shielding layer approaches the second light-shielding layer from the side of the substrate closer to the optical axis, in a direction toward the optical axis, and forms the tapered surface.

4. The imaging lens according to claim 1, wherein the image-side surface and the object-side surface of each of the rotatable light-shielding sheets are made of different materials.

5. The imaging lens according to claim 4, wherein the image-side surface and the object-side surface of each of the rotatable light-shielding sheets have different degrees of gloss.

6. The imaging lens according to claim 1, wherein at least one of the plurality of rotatable light-shielding sheets further includes a coating layer that is installed on the side of the plurality of rotatable light-shielding sheets closer to the optical axis and forms the tapered surface.

7. The imaging lens according to claim 6, wherein the coating layer is an absorbent coating.

8. The adjustable aperture unit further includes a flexible sheet that is coupled to and rotates simultaneously with one of the plurality of rotatable light-shielding sheets, The bending-resistant sheet is located further from the optical axis than the plurality of rotatable light-shielding sheets. In a direction parallel to the optical axis, the thickness of the bending-resistant sheet is defined as S, and the thickness of the plurality of rotatable light-shielding sheets from one of the object-side surfaces to the image-side surface is defined as T. The imaging lens according to claim 1, satisfying the condition 0.23 ≤ T / S ≤ 0.

94.

9. The plurality of rotatable light-shielding sheets are, A light-blocking sheet that can be rotated in the first direction, A second rotatable light-shielding sheet partially overlaps the first rotatable light-shielding sheet in a direction parallel to the optical axis and is closer to the plurality of lenses than the first rotatable light-shielding sheet, Includes, In a direction parallel to the optical axis, the thickness of the first rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Ti, and the thickness of the second rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Tii. The imaging lens according to claim 1, satisfying the condition 0.23 ≤ Ti / Tii ≤ 0.

95.

10. The lens barrel further includes the optical axis, and the plurality of lenses and the adjustable aperture unit are installed in the lens barrel. The imaging lens according to claim 1, wherein one of the plurality of lenses is a first lens, which is closer to the adjustable aperture unit than the other lenses, and the first lens protrudes toward the object side from the lens barrel.

11. A camera module including the imaging lens described in claim 1.

12. An electronic device including the camera module described in claim 11.

13. Multiple lenses arranged sequentially along the optical axis, An adjustable aperture unit installed on the object side of the plurality of lenses, comprising a plurality of rotatable light-shielding sheets, wherein the plurality of rotatable light-shielding sheets are arranged around the optical axis and form an adjustable light-passing hole, and each of the rotatable light-shielding sheets comprises an image-side surface and an object-side surface, wherein the image-side surface faces the plurality of lenses and the object-side surface faces the image-side surface, Includes, The adjustable aperture unit is coupled to one of the plurality of rotatable light-shielding sheets and further includes a bending-resistant sheet that is further from the optical axis than the plurality of rotatable light-shielding sheets.

14. In a direction parallel to the optical axis, the thickness of the bending-resistant sheet is defined as S, and the thickness of one of the plurality of rotatable light-shielding sheets from the object-side surface to the image-side surface is defined as T. The imaging lens according to claim 13, which satisfies the condition 0.23 ≤ T / S ≤ 0.

94.

15. The imaging lens according to claim 13, wherein the bending-resistant sheet includes a convex structure that protrudes in a direction away from one of the plurality of rotatable light-shielding sheets.

16. The imaging lens according to claim 13, wherein the image-side surface and the object-side surface of each of the rotatable light-shielding sheets are made of different materials.

17. At least one of the plurality of rotatable light-shielding sheets is sequentially positioned from the image side toward the object side. The first light-shielding layer, Substrate and The second light-shielding layer, Includes, The imaging lens according to claim 13, wherein the side of the substrate closer to the optical axis is further from the optical axis than the first light-shielding layer and the second light-shielding layer.

18. The imaging lens according to claim 17, wherein at least one of the plurality of rotatable light-shielding sheets further includes a coating layer, and at least a portion of the coating layer is installed on the side of the substrate closer to the optical axis.

19. Multiple lenses arranged sequentially along the optical axis, An adjustable aperture unit installed on the object side of the plurality of lenses, comprising a plurality of rotatable light-shielding sheets, wherein the plurality of rotatable light-shielding sheets are arranged around the optical axis and form an adjustable light-passing hole, and each of the rotatable light-shielding sheets comprises an image-side surface and an object-side surface, wherein the image-side surface faces the plurality of lenses and the object-side surface faces the image-side surface, Includes, The plurality of rotatable light-shielding sheets are, A light-blocking sheet that can be rotated in the first direction, A second rotatable light-shielding sheet partially overlaps the first rotatable light-shielding sheet in a direction parallel to the optical axis and is closer to the plurality of lenses than the first rotatable light-shielding sheet, Includes, In a direction parallel to the optical axis, the thickness of the first rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Ti, and the thickness of the second rotatable light-shielding sheet from the object-side surface to the image-side surface is defined as Tii. An imaging lens that satisfies the condition 0.23 ≤ Ti / Tii ≤ 0.

95.

20. The imaging lens according to claim 19, wherein the image-side surface and the object-side surface of each of the rotatable light-shielding sheets are made of different materials.

21. At least one of the plurality of rotatable light-shielding sheets is sequentially positioned from the image side toward the object side. The first light-shielding layer, Substrate and The second light-shielding layer, Includes, The imaging lens according to claim 19, wherein the side of the substrate closer to the optical axis is further from the optical axis than the first light-shielding layer and the second light-shielding layer.

22. The imaging lens according to claim 21, wherein at least one of the plurality of rotatable light-shielding sheets further includes a coating layer, and at least a portion of the coating layer is installed on the side of the substrate closer to the optical axis.

23. Multiple lenses arranged sequentially along the optical axis, An adjustable aperture unit installed on the object side of the plurality of lenses, comprising a plurality of rotatable light-shielding sheets, wherein the plurality of rotatable light-shielding sheets are arranged around the optical axis and form an adjustable light-passing hole, and each of the rotatable light-shielding sheets comprises an image-side surface and an object-side surface, wherein the image-side surface faces the plurality of lenses and the object-side surface faces the image-side surface, Includes, At least one of the plurality of rotatable light-shielding sheets, the image-side surface, is positioned on the side of the image-side surface closer to the optical axis and includes a tapered surface that gradually approaches the object-side surface in a direction toward the optical axis. An imaging lens in which, in a cross-section parallel to the optical axis, the tapered surface is arc-shaped.

24. At least one of the plurality of rotatable light-shielding sheets is sequentially positioned from the image side toward the object side. The first light-shielding layer forming the image-side surface, Substrate and A second light-shielding layer forming the object-side surface, Includes, The side of the substrate closer to the optical axis is further from the optical axis than the first light-shielding layer and the second light-shielding layer. The imaging lens according to claim 23, wherein the first light-shielding layer approaches the second light-shielding layer from the side of the substrate closer to the optical axis, in a direction toward the optical axis, and forms the tapered surface.

25. The imaging lens according to claim 23, wherein at least one of the plurality of rotatable light-shielding sheets further includes a coating layer that is installed on the side of the plurality of rotatable light-shielding sheets closer to the optical axis and forms the tapered surface.

26. Multiple lenses arranged sequentially along the optical axis, An adjustable aperture unit installed on the object side of the plurality of lenses, comprising a plurality of rotatable light-shielding sheets, wherein the plurality of rotatable light-shielding sheets are arranged around the optical axis and form an adjustable light-passing hole, and each of the rotatable light-shielding sheets comprises an image-side surface and an object-side surface, wherein the image-side surface faces the plurality of lenses and the object-side surface faces the image-side surface, Includes, On one of the plurality of rotatable light-shielding sheets, on the side closer to the optical axis, the thickness of the rotatable light-shielding sheet gradually decreases toward the side closer to the optical axis. One of the plurality of rotatable light-shielding sheets further includes a coating layer that is installed on the side of the rotatable light-shielding sheet closest to the optical axis and forms a tapered surface, which is part of the imaging lens.

27. Each of the aforementioned rotatable light-shielding sheets is sequentially positioned from the image side toward the object side. The first light-shielding layer forming the image-side surface, Substrate and A second light-shielding layer forming the object-side surface, Includes, The imaging lens according to claim 26, wherein the side of the substrate closer to the optical axis is further from the optical axis than the first light-shielding layer and the second light-shielding layer.

28. The imaging lens according to claim 27, wherein one of the first light-shielding layer and the second light-shielding layer approaches the other of the first light-shielding layer and the second light-shielding layer in a direction approaching the optical axis from the side of the substrate closer to the optical axis.

29. The imaging lens according to claim 26, wherein the tapered surface is installed on the object-side surface.

30. The imaging lens according to claim 26, wherein the image-side surface and the object-side surface of each of the rotatable light-shielding sheets have different degrees of gloss.

31. The lens barrel further includes the optical axis, and the plurality of lenses and the adjustable aperture unit are installed in the lens barrel. The imaging lens according to claim 26, wherein one of the plurality of lenses is a first lens, which is closer to the adjustable aperture unit than the other of the plurality of lenses, and the first lens protrudes toward the object side from the lens barrel.

32. A camera module including the imaging lens described in claim 26.

33. An electronic device including the camera module described in claim 32.

Images