Imaging lens, camera module and electronic device

Abstract

Imaging lens (10) comprising the following: at least one lens element (11) with an optical axis (111); a tube (12) in which the at least one lens element (11) is accommodated; an arm (13) which is arranged on one side of the tube (12) away from the optical axis (111), wherein the arm (13) extends in a direction away from the optical axis (111); a holder (14) with a first contact surface (141) that overlaps and is in contact with the arm (13) in a direction parallel to the optical axis (111); and a holder (15) attached to the holder (14), wherein the holder (15) has a second contact surface (151) which overlaps and is in contact with the arm (13) in a direction parallel to the optical axis (111), and wherein the second contact surface (151) is arranged on a side opposite the first contact surface (141); wherein the arm (13) is arranged between the holder (14) and the bracket (15); wherein the holder (14) and the bracket (15) are made of different materials; wherein the first contact surface (141) and the second contact surface (151) surround the optical axis (111) and do not overlap in a direction parallel to the optical axis (111); where a coefficient of thermal expansion of the holder (14) α-holder is, a coefficient of thermal expansion of the holder (15) α-holder is, and the following condition is met: α-holder < α-holder ; wherein a distance between the optical axis (111) and a side of the first contact surface (141) close to the second contact surface (151) D-1 is to the center, a distance between the optical axis (111) and a side of the second contact surface (151) close to the first contact surface (141) D-2 is to the center and the following condition is met: 0.05 mm ≤ | D- 1 to center − D- 2 to center | ≤ 1.8 mm .

Description

BACKGROUND Subject area

[0001] The present disclosure relates to an imaging lens, a camera module and an electronic device, in particular an imaging lens that can be used in a camera module and an electronic device. Description of related technology

[0002] With technological advancements, high image quality has become an indispensable feature of optical systems. Furthermore, electronic devices equipped with optical systems are increasingly multifunctional for various applications, which has raised the bar for the functionality of these systems.

[0003] However, conventional optical lens systems struggle to meet the high optical quality requirements of electronic devices, which have undergone numerous developments in recent years, particularly regarding dimensional accuracy tolerance to ambient temperature fluctuations in the current technological landscape. Therefore, the question of how to improve the mechanism for moving an optical lens system to meet the stringent requirements of high-end electronic devices is currently a major focus in this field. SUMMARY

[0004] According to one aspect of the present disclosure, an imaging lens comprises at least one lens element, a tube, an arm, a holder, and a mount. The at least one lens element has an optical axis. The at least one lens element is housed in the tube. The arm is located on a side of the tube that is away from the optical axis and extends in a direction away from the optical axis. The holder has a first contact surface that overlaps and is in contact with the arm in a direction parallel to the optical axis. The mount is attached to the holder and has a second contact surface that overlaps and is in contact with the arm in a direction parallel to the optical axis. The second contact surface is located on a side opposite the first contact surface. The arm is positioned between the holder and the mount.The holder and the bracket are made of different materials. The first contact surface and the second contact surface surround the optical axis and do not overlap in a direction parallel to the optical axis. If the coefficient of thermal expansion of the holder is α-holder and the coefficient of thermal expansion of the bracket is α-bracket, the following condition is met: α-bracket < α-holder. If the distance between the optical axis and one side of the first contact surface is close to the second contact surface D-1 to the center, and the distance between the optical axis and one side of the second contact surface is close to the first contact surface D-2 to the center, the following condition is met: 0.05 mm ≤ |D-1 to the center - D-2 to the center ≤ 1.8 mm.

[0005] According to another aspect of the present disclosure, a camera module comprises the aforementioned imaging lens and an image acquisition assembly. The image acquisition assembly includes an image sensor arranged on an image-facing side of the imaging lens. The holder of the imaging lens is attached to the image acquisition assembly.

[0006] According to another aspect of the present disclosure, a camera module comprises a lens assembly, a tube, an arm, an image sensor, a holder, and a mount. The lens assembly has a plurality of lens elements arranged along an optical axis. The tube supports the lens assembly. The arm extends from the tube in a direction away from the optical axis. The image sensor is arranged on an image-side face of the lens assembly. The holder is configured such that the tube can be positioned on it so that the tube is aligned with the image sensor, and the holder has a first contact surface that surrounds the optical axis and is in contact with the arm.The bracket is attached to the holder to secure the tube to the holder, and the bracket has a second contact surface that surrounds the optical axis and is in contact with the arm to keep the arm in constant contact with the first contact surface. The arm is positioned between the holder and the bracket. One of the arm, the holder, and the bracket is made of a material different from that of the other two. The first contact surface and the second contact surface do not overlap in a direction parallel to the optical axis.If a distance between the optical axis and one side of the first contact surface is close to the second contact surface D-1 to the center, and a distance between the optical axis and one side of the second contact surface is close to the first contact surface D-2 to the center, the following condition is met: 0.05 mm ≤ |D-1 to the center - D-2 to the center ≤ 1.8 mm.

[0007] According to another aspect of the present disclosure, a camera module comprises a lens assembly, a tube, an arm, an image sensor, a holder, and a mount. The lens assembly has a plurality of lens elements arranged along an optical axis. The tube supports the lens assembly. The arm extends from the tube in a direction away from the optical axis. The image sensor is arranged on an image-side face of the lens assembly. The holder is configured such that the tube can be positioned on it so that the tube is aligned with the image sensor. The holder comprises a base and a holder support arranged at the base. The holder support has a first contact surface that surrounds the optical axis and is in contact with the arm, and the holder support supports the tube through the first contact surface.The bracket is attached to the holder to secure the tube to the holder, and the bracket has a second contact surface and a mounting section. The second contact surface surrounds the optical axis and is in contact with the arm. The bracket is secured to the base by the mounting section. The arm is positioned between the holder and the bracket. One of the arm, the holder, or the bracket is made of a material different from that of the other two. The first contact surface and the second contact surface do not overlap in a direction parallel to the optical axis.

[0008] According to another aspect of the present disclosure, a camera module comprises a plurality of lens elements, a tube, an arm, an image sensor, a holder, and a mount. The lens elements are arranged along an optical axis. The tube has a cylindrical wall surrounding the lens elements. The arm extends from the cylindrical wall of the tube in a direction away from the optical axis and has an upper arm surface facing the object side and a lower arm surface facing the image side. The image sensor is located on an image side of the tube. The holder is configured to accommodate the tube. The holder comprises a base and a holder support. The base has a bottom section and a surrounding wall. The bottom section has a lower surface facing the arm.The surrounding wall extends from the lower surface of the base section to the arm, and the surrounding wall has a surrounding upper surface facing the arm and a surrounding inner surface facing the tube. The holder support is connected to the base. The holder support has a reinforcing element and an extension section. The reinforcing element comprises a first contact section, a connecting section, and a second contact section. The first contact section rests against the surrounding upper surface. The connecting section extends from the first contact section in a direction away from the arm. The second contact section is connected to the connecting section, and the second contact section is positioned farther away from the arm than the first contact section.The extension section has a first end connected to the second attachment section and a second end extending from the first end towards the arm. The second end is in contact with the lower arm surface, forming a first contact surface. The bracket is attached to the holder and rests against the upper arm surface, forming a second contact surface. If a length of the surrounding inner surface along a direction parallel to the optical axis is L-side-surface-decay, and a length of the lower surface along a direction parallel to the optical axis is L-lower-side-surface, then the following condition is satisfied: L-side-surface-decay > L-lower-side-surface.

[0009] According to another aspect of the present disclosure, an electronic device comprises one of the camera modules mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The disclosure can be better understood by reading the following detailed description of the embodiments with reference to the accompanying drawings: Fig. Figure 1 is a cross-sectional view of an imaging lens according to the first embodiment of the present disclosure; Fig. Figure 2 is an enlarged view of area AA of the imaging lens. Fig. 1; Fig. Figure 3 is an enlarged view of area BB of the imaging lens. Fig. 1; Fig. Figure 4 is a cross-sectional view of an imaging lens according to the second embodiment of the present disclosure; Fig. Figure 5 is an enlarged view of the CC area of ​​the imaging lens. Fig. 4; Fig. Figure 6 is a cross-sectional view of an imaging lens according to the 3rd embodiment of the present disclosure; Fig. Figure 7 is an enlarged view of the DD area of ​​the imaging lens. Fig. 6; Fig. Figure 8 is a cross-sectional view of an imaging lens according to the 4th embodiment of the present disclosure; Fig. Figure 9 is an enlarged view of the EE area of ​​the imaging lens. Fig. 8; Fig. Figure 10 is a cross-sectional view of an imaging lens according to the 5th embodiment of the present disclosure; Fig. Figure 11 is an enlarged view of area FF of the imaging lens. Fig. 10; Fig. Figure 12 is a cross-sectional view of an imaging lens according to the 6th embodiment of the present disclosure; Fig. Figure 13 is an enlarged view of the GG area of ​​the imaging lens. Fig. 12; Fig. Figure 14 is a schematic view showing a corresponding arrangement of elements of the imaging lens. Fig. 12 shows; Fig. Figure 15 is a schematic view showing a corresponding arrangement of other elements of the imaging lens. Fig. 12 shows; Fig. Figure 16 is a schematic view showing a corresponding arrangement of elements of an imaging lens according to the 7th embodiment of the present disclosure; Fig. 17 is a schematic view showing a corresponding arrangement of other elements of the imaging lens. Fig. 16 shows; Fig. Figure 18 is a cross-sectional view of an imaging lens according to the 8th embodiment of the present disclosure; Fig. Figure 19 is an enlarged view of area HH of the imaging lens. Fig. 18; Fig. Figure 20 is an exploded view of the imaging lens. Fig. 18; Fig. 21 is another exploded view of the imaging lens from Fig. 18; Fig. Figure 22 is a schematic view showing a corresponding arrangement of elements of an imaging lens according to the 9th embodiment of the present disclosure; Fig. Figure 23 is a schematic view showing a corresponding arrangement of other elements of the imaging lens. Fig. 22 shows; Fig. Figure 24 is a perspective view of an electronic device according to the 10th embodiment of the present disclosure; Fig. Figure 25 is a perspective view of an electronic device according to the 11th embodiment of the present disclosure; Fig. Figure 26 is another perspective view of the electronic device in Fig. 25; Fig. Figure 27 is a representation of an image captured by an ultra-wide-angle camera module; Fig. Figure 28 is a representation of an image captured by a high-pixel camera module; Fig. Figure 29 is a representation of an image taken by a telephoto camera module; Fig. Figure 30 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure; Fig. Figure 31 is a perspective view of an electronic device according to the 13th embodiment of the present disclosure; Fig. Figure 32 is a side view of the electronic device in Fig. 31; and Fig. 33 is a top view of the electronic device in Fig. 31. DETAILED DESCRIPTION

[0011] The following detailed description provides numerous specific details for explanatory purposes, in order to convey a thorough understanding of the disclosed embodiments. However, it is obvious that one or more embodiments can also be realized without these specific details. In other cases, known structures and devices are shown schematically to simplify the drawing.

[0012] A camera module provided in the present disclosure comprises an imaging lens and an image acquisition assembly.

[0013] The imaging lens comprises at least one lens element, a tube, an arm, a holder, and a mount. The number of the at least one lens element can be multiple, and the multiple lens elements form a lens assembly.

[0014] The at least one lens element has an optical axis. The at least one lens element is arranged along the optical axis. The tube accommodates (or supports) the at least one lens element. Furthermore, the at least one lens element can comprise a plastic lens element and a glass lens element. This is advantageous for improving optical quality and reducing environmental impacts on the imaging lens. In addition, the glass lens element can have a relatively low coefficient of thermal expansion, which allows the glass lens element to maintain its optical quality despite environmental fluctuations. In one aspect of the present disclosure, the tube can have a cylindrical wall surrounding the at least one lens element.

[0015] The arm is located on the side of the tube that is away from the optical axis. Furthermore, the arm can be located on the side of the tube that is away from the optical axis by any suitable fastening means, such as screwing, structural fastening, adhesive bonding, and welding. Alternatively, the arm is formed integrally with the tube to prevent misalignment of the arm during assembly and thus increase yield, which can also increase the structural strength between the arm and the tube and simplify the manufacturing processes. However, the present disclosure is not limited to specific fastening means between the arm and the tube. The arm extends from the tube in a direction away from the optical axis.Furthermore, in the aspect where the tube has a cylindrical wall, the arm can extend from the cylindrical wall of the tube in a direction away from the optical axis. Additionally, the distance between the arm and an object end of the tube can be less than the distance between the arm and an image end of the tube. This is advantageous for reducing the height of the imaging lens and thus miniaturizing the camera module. It is also advantageous to position the arm close to the object end, providing sufficient space on the image side of the arm for a holder of adequate length. Moreover, the sufficient length of the holder can achieve a good extension effect. The arm can also have an upper surface facing the object side and a lower surface facing the image side.

[0016] The holder is attached to the image acquisition assembly. Therefore, it is advantageous to distance the imaging lens from the image sensor and reduce the mounting tolerance between the imaging lens and the image acquisition assembly, thereby improving optical image stability. Furthermore, the holder can be attached to the image acquisition assembly by any suitable fastening means, such as screwing, structural fastening, adhesive bonding, and welding. However, the present disclosure is not limited to a specific fastening means between the holder and the image acquisition assembly. In addition, the holder can be configured such that the tube can be positioned on it in a manner corresponding to the image sensor. Furthermore, the tube can be attached to the holder. The holder has a first contact surface that overlaps and is in contact with the arm in a direction parallel to the optical axis.

[0017] In particular, the holder can comprise a base and a holder support. The base has a bottom section and a surrounding wall. The bottom section has a lower surface facing the arm. The surrounding wall extends from the lower surface of the bottom section toward the arm, and the surrounding wall has a surrounding upper surface facing the arm and a surrounding inner surface facing the tube. The holder support is located on (or connected to) the base. The holder support has the aforementioned first contact surface and a third contact surface. The holder support carries the tube through the first contact surface. The holder support is in contact with the base through the third contact surface.

[0018] The holder can have a reinforcing element and an extension section. The reinforcing element can overlap the first contact surface in a direction parallel to the optical axis. This is advantageous for preventing deformation of the holder when excessive force is applied to the first contact surface. Furthermore, the reinforcing element can be made of a metal, ceramic, composite material containing fiberglass, etc. The reinforcing element can also include a first contact section, a connecting section, and a second contact section. The first contact section rests against the surrounding upper surface. The connecting section extends from the first contact section in a direction away from the arm. The second contact section is connected to the connecting section.The second section of the system is positioned further away from the arm than the first section. Furthermore, the reinforcing element can be located between the extension section and the surrounding wall. This is advantageous for improving the structural strength of both the first and second sections.

[0019] The extension section has a first end connected to the second mounting section and a second end extending from the first end towards the arm. The first end is in contact with the reinforcing element, forming a fourth contact surface, which may be positioned further away from the arm than the third contact surface. The second end is in contact with the lower arm surface, forming the aforementioned first contact surface. Furthermore, the extension section may be made of plastic. It also exhibits a coefficient of thermal expansion that varies with temperature. The extension section is designed to move the first contact surface of the holder along a direction parallel to the optical axis. Finally, the holder support may include the aforementioned reinforcing element and the aforementioned holder.

[0020] The bracket is attached to the holder. Furthermore, the bracket can be attached to the holder using any suitable fastening method, such as screws, structural fixings, adhesive bonding, or welding. Note that when fastening the bracket and holder by screwing, a specific torque can be applied to the screws to ensure a stable attachment and optimal movement between the bracket and the holder. However, the present disclosure is not limited to specific fastening methods between the bracket and the holder. The holder has a second contact surface that overlaps and is in contact with the arm in a direction parallel to the optical axis. The second contact surface is located on the opposite side of the first contact surface. Furthermore, the second contact surface is designed to keep the arm in constant contact with the first contact surface.Furthermore, the bracket can rest against the upper surface of the arm, forming the second contact surface mentioned above.

[0021] In the imaging lens, the arm is positioned between the holder and the bracket, and each of the arm, holder, and bracket is made of a different material than the other two. Therefore, the arm located on the outside of the tube is advantageously designed to flex or deform in response to temperature fluctuations, thus forming a compensating mechanism to counteract the thermal effect and maintain the optical quality of the imaging lens over a relatively wide ambient temperature range. Furthermore, the holder and bracket are made of different materials.

[0022] In the imaging lens, the first and second contact surfaces surround the optical axis and do not overlap in a direction parallel to the optical axis. Therefore, it is advantageous to use one of the first and second contact surfaces as a pivot point and the arm as a lever, so that the at least one lens element and the tube can be moved by the lever along a direction parallel to the optical axis in response to ambient temperature fluctuations, thereby compensating for any thermal effect on the imaging lens. Furthermore, the first and second contact surfaces can surround the optical axis, for example, in a loop shape, an arc shape, a multiple arc shape, etc. However, the present disclosure is not limited to any particular way in which the first and second contact surfaces surround the optical axis.

[0023] With the configuration described above, the different deformation rates of the holder and the mount due to temperature fluctuations can exert a torque on the arm, resulting in a slight and controlled bending of the arm in response to changes in ambient temperature. This can cause an accurate and precise displacement of at least one lens element and the tube in a direction parallel to the optical axis. Therefore, changes in the rear focal length caused by fluctuations in ambient temperature can be compensated for, allowing the imaging lens to maintain high optical performance.

[0024] It should be noted that the tube, arm, holder and bracket may, for example, be made of plastic material, but the present disclosure is not limited to this.

[0025] According to the present disclosure, the imaging lens can further comprise a connector. The connector can be formed on the arm. The connector can surround the optical axis and form a light-transmitting hole. The light-transmitting hole can be located at a position where an aperture of the imaging lens is arranged. Therefore, it is advantageous to connect the holder and the tube by means of the connector in order to prevent damage to the lens element due to bending of the arm and thereby improve the optical performance.

[0026] According to the present disclosure, the image acquisition assembly of the camera module comprises an image sensor arranged on the image side of the imaging lens. Furthermore, the image acquisition assembly may also include various components such as a carrier plate, a filter, a filter holder, etc., although the present disclosure is not limited thereto.

[0027] If the coefficient of thermal expansion of the holder is α-holder and the coefficient of thermal expansion of the bracket is α-bracket, then the following condition is met: α-bracket < α-holder. Therefore, it is advantageous to secure the relative position of the tube, holder, and bracket, thereby maintaining optical quality. Note that both the holder and the bracket can have a positive coefficient of thermal expansion (expansion with increasing temperature and contraction with decreasing temperature), a negative coefficient of thermal expansion (contraction with increasing temperature and expansion with decreasing temperature), or a variable coefficient of thermal expansion with different expansion behavior in different temperature ranges.It should be noted that, unless otherwise specified, the coefficient of thermal expansion of a component in this disclosure denotes a standard measurement based on an atmospheric pressure of one at 25 °C.

[0028] If the distance between the optical axis and one side of the first contact surface is close to the second contact surface D-1 to the center, and if the distance between the optical axis and one side of the second contact surface is close to the first contact surface D-2 to the center, then the following condition is met: 0.05 mm ≤ |D-1 to the center - D-2 to the center ≤ 1.8 mm. Therefore, this is advantageous for a secure fastening of the mechanism assembly to a certain extent. Furthermore, the following condition can also be met: 0.1 mm ≤ |D-1 to the center - D-2 to the center ≤ 1.8 mm. Additionally, the following condition can also be met: 0.2 mm ≤ |D-1 to the center - D-2 to the center ≤ 1.8 mm.

[0029] If the distance between the optical axis and the side of the first contact surface is close to the second contact surface D-1 to the center, and the distance between the optical axis and the side of the second contact surface is close to the first contact surface D-2 to the center, the following condition can be met: 0.01 ≤ |D-1 to the center| - D-2 to the center| / (D-1 to the center + D-2 to the center) ≤ 0.145. Therefore, it is advantageous to have a sufficient force arm to move the at least one lens element and the tube.

[0030] If the coefficient of thermal expansion of the holder at 25 °C is α-holder25 and the coefficient of thermal expansion of the holder at 50 °C is α-holder50, the following condition can be met: 1.01 ≤ α-holder50 / α-holder25 ≤ 3.63. Therefore, it is advantageous to optimize the thermal expansion within a specific ambient temperature range and thereby optimize the optical quality.

[0031] If the coefficient of thermal expansion of the holder α-holder and the coefficient of thermal expansion of the bracket α-bracket is α-bracket, the following condition can be met: 30 ppm / °C < α-holder - α-bracket < 240 ppm / °C. Therefore, it is advantageous for securing the relative position of the tube, holder, and bracket, thus maintaining optical quality.

[0032] If the coefficient of thermal expansion of the extension section α-extension and the coefficient of thermal expansion of the bracket at 25 °C is α-bracket25, the following condition can be met: 30 ppm / °C ≤ α-extension-α-bracket25 ≤ 240 ppm / °C.

[0033] If the coefficient of thermal expansion of the holder α-holder and the coefficient of thermal expansion of the arm α-arm is α-holder, the following condition can be met: α-holder ≤ α-arm. Therefore, it is advantageous to further secure the tube firmly in position on the holder.

[0034] If the coefficient of thermal expansion of the bracket is α-bracket, the coefficient of thermal expansion of the arm is α-arm, the coefficient of thermal expansion of the tube is α-tube, and the coefficient of thermal expansion of the holder is α-holder, then the following condition can be met: α-bracket < α-arm ≤ α-tube < α-holder. Therefore, this is advantageous for ensuring the secure connection of the components.

[0035] If the coefficient of thermal expansion of the tube at 25 °C is α-Tube25 and the coefficient of thermal expansion of the bracket at 25 °C is α-Bracket25, the following condition can be met: α-Bracket25 < α-Tube25.

[0036] If the thickness of the arm parallel to the optical axis between the first and second contact surfaces is T-arm, the following condition can be met: 0.15 mm ≤ T-arm ≤ 1.5 mm. Therefore, it is advantageous to ensure both bending flexibility and sufficient arm support, thus guaranteeing manufacturability. Furthermore, the following conditions can also be met: 0.25 mm ≤ T-arm ≤ 1.5 mm. Furthermore, the following conditions can also be met: 0.25 mm ≤ T-arm ≤ 1.2 mm. Furthermore, the following conditions can also be met: 0.35 mm ≤ T-arm ≤ 1.5 mm. Furthermore, the following condition can also be met: 0.35 mm ≤ T-arm ≤ 1.2 mm. Furthermore, the following condition can also be met: 0.35 mm ≤ T-arm ≤ 0.75 mm.

[0037] The arm can have a bending surface. The bending surface can be located closer to the optical axis than the first and second contact surfaces. If the minimum thickness of the arm at the bending surface is T-bend along a direction parallel to the optical axis, and the thickness of the arm parallel to the optical axis between the first and second contact surfaces is T-arm, the following condition can be met: 0.333 ≤ T-bend / T-arm ≤ 0.885. This is advantageous for controlling the extent of tube deformation caused by the bending of the arm, thus maintaining optical quality. Furthermore, the thickness of the arm can gradually increase along a direction parallel to the optical axis from the position where the bending surface is located to the position where the first contact surface is located.Furthermore, the arm can also have a flat surface that is perpendicular to the optical axis and located closer to the optical axis than the bending surface. Additionally, the thickness of the arm at the flat surface along a direction parallel to the optical axis is greater than the thickness of the arm at the bending surface along a direction parallel to the optical axis.

[0038] If the minimum thickness of the arm at the bending surface along the direction parallel to the optical axis is a T-bend, the following condition can be met: 0.15 mm ≤ T-bend ≤ 1 mm.

[0039] If the thickness of the arm parallel to the optical axis between the first contact surface and the second contact surface is T-arm, and the thickness of the tube along a direction parallel to the optical axis is T-tube, the following condition can be met: 0.035 ≤ T-arm / T-tube ≤ 0.18. Therefore, this is advantageous for ensuring mounting stability.

[0040] The holder may also have a first recess surface. The first recess surface may face the arm. The first recess surface may be adjacent to the first contact surface and spaced apart from the arm. If the distance between the first recess surface and the arm is parallel to the optical axis, the following condition can be met: 0.01 mm ≤ G-holder ≤ 0.4 mm. This is advantageous to avoid the risk of the component not returning to its original position after normalization of the ambient temperature, thus ensuring the stability and reliability of the mechanism. Furthermore, a gap formed between the first recess surface and the arm corresponds to the second contact surface in a direction parallel to the optical axis. Additionally, the imaging lens may also include an insertion element.The insertion element can be positioned between the first recess surface and the arm, and the insertion element can be in contact with both the first recess surface and the arm. Therefore, the insertion element is advantageous for providing multiple functions such as cushioning, elasticity, and sealing to optimize arm bending, thereby further ensuring the stability and reliability of the mechanism.

[0041] The bracket can further have a second recessed surface. This second recessed surface can be located adjacent to the second contact surface and spaced apart from the arm. If the distance between the second recessed surface and the arm (G-bracket) is parallel to the optical axis, the following condition can be met: 0.01 mm ≤ G-bracket ≤ 0.4 mm. This is advantageous to avoid the risk of the component failing to return to its original position after normalizing the ambient temperature, thus ensuring the stability and reliability of the mechanism.

[0042] The bracket may also have a mounting section. The mounting section may be attached to the bracket. Furthermore, the bracket may be connected to the bracket by the mounting section. Additionally, the bracket may be attached to the base of the bracket by the mounting section. Furthermore, the third contact surface may be located closer to the arm than the mounting section. If the thickness of the arm is parallel to the optical axis between the first contact surface and the second contact surface T-arm, and a length parallel to the optical axis between the second contact surface and the mounting section L-2 is present, the following condition can be met: 0.042 ≤ T-arm / L-2 for mounting ≤ 0.775.Therefore, it is advantageous to have sufficient deformation clearance of the holder and the bracket along the optical axis, thereby ensuring the effectiveness of the temperature compensation mechanism.

[0043] If the length of the first contact surface along a plane parallel to the optical axis is L-holder and the length of the second contact surface along a plane parallel to the optical axis is L-holder, the following condition can be met: 0.2 < L-holder / L-holder < 5. Therefore, it is advantageous to adequately increase the durability of the arm against an external force.

[0044] If a length of the surrounding inner surface along a direction parallel to the optical axis is L-side-surface-deterioration and a length of the lower surface along a direction parallel to the optical axis is L-lower-side-surface, then the following condition can be satisfied: L-side-surface-deterioration > L-lower-side-surface.

[0045] The imaging lens holder can also have an inner surface. This inner surface can face the optical axis. An air gap can form between the inner surface and the tube. This air gap overlaps with the at least one lens element along a direction perpendicular to the optical axis. Therefore, it is advantageous for the lens element to have freedom of movement along the optical axis when subjected to force-induced deformation, thus ensuring optical quality. Furthermore, the air gap can also be formed between the arm and the holder.

[0046] In the imaging lens, the coefficient of thermal expansion (CTE) for each of the tube, holder and bracket can be selected from the values ​​in Tables 1 and 2 below, where the definitions of α-tube, α-holder25, α-holder and α-bracket are identical to the above and are therefore not repeated. Tabelle 1 Parameter CTE (ppm / °C) Tubus α-Tubus 70 Halter α-Halter25 80 α-Halter50 145 Halterung α-Halterung 35 Tabelle 2 Parameter CTE (ppm / °C) Tubus α-Tubus 70 Halter α-Halter 80 Halterung α-Halterung 25

[0047] In Table 1 and Table 2, each of the tube, holder, and bracket is made of plastic material. Furthermore, the arm can have the same coefficient of thermal expansion as the tube.

[0048] Note that, unless otherwise specified, the coefficient of thermal expansion of a component in this disclosure denotes a standard measurement at 25 °C. Specifically, the definition of α-tube is generally equivalent to that of α-tube25, the definition of α-holder is generally equivalent to that of α-holder25, the definition of α-bracket is generally equivalent to that of α-bracket25, and the definition of α-arm is generally equivalent to the definition of α-arm25 as "a coefficient of thermal expansion of the arm at 25 °C". Similarly, the definition of α-extension is generally equivalent to the definition of α-extension25 as "a coefficient of thermal expansion of the extension at 25 °C".

[0049] According to the present disclosure, the above-mentioned features and conditions can be used in numerous combinations to achieve corresponding effects.

[0050] In accordance with the above description of the present disclosure, the following specific embodiments are provided for further explanation. 1. Design

[0051] See Fig. 1 to Fig. 3, wherein Fig. 1 a cross-sectional view of an imaging lens according to the 1st embodiment of the present disclosure is, Fig. 2 an enlarged view of area AA of the imaging lens Fig. 1 is and Fig. 3 an enlarged view of area BB of the imaging lens Fig. 1 is.

[0052] A camera module 1 provided in this embodiment comprises an imaging lens 10 and an image acquisition assembly 1a.

[0053] The imaging lens 10 comprises a plurality of lens elements 11, a tube 12, an arm 13, a holder 14 and a mount 15. The lens elements 11 form a lens assembly (unnumbered).

[0054] The lens elements 11 have an optical axis 111. The lens elements 11 are arranged along the optical axis 111. The tube 12 accommodates (or carries) the lens elements 11. Note that the number and shape of the lens elements 11 shown in the drawings are only exemplary, and some contours have been omitted so as not to obscure the present disclosure. The present disclosure is not limited to the number and shapes of the lens elements 11 shown in the drawings.

[0055] The arm 13 is arranged on a side of the tube 12 that is away from the optical axis 111. The arm 13 extends from the tube 12 in a direction away from the optical axis 111. In this embodiment, the arm 13 is formed integrally with the tube 12, and the boundary between the arm 13 and the tube 12 is defined in Fig. 1 is represented by dashed lines to distinguish the arm 13 from the tube 12. In this embodiment, the distance between the arm 13 and an object end of the tube 12 is smaller than the distance between the arm 13 and an image end of the tube 12.

[0056] The holder 14 has a first contact surface 141 which overlaps with and is in contact with the arm 13 in a direction parallel to the optical axis 111.

[0057] The bracket 15 is fixed to the holder 14 by a structural fastening. The bracket 15 has a second contact surface 151 that overlaps and is in contact with the arm 13 in a direction parallel to the optical axis 111. The second contact surface 151 is located on the opposite side of the first contact surface 141. The bracket 15 rests against the arm 13 via the second contact surface 151, thus keeping the arm 13 in constant contact with the first contact surface 141.

[0058] In the imaging lens 10, the arm 13 is arranged between the holder 14 and the mount 15, and the holder 14 and the mount 15 are made of different materials. The first contact surface 141 and the second contact surface 151 surround the optical axis 111 and do not overlap in a direction parallel to the optical axis 111.

[0059] The image acquisition assembly 1a comprises a carrier plate CR and an image sensor IS. The carrier plate CR is attached to the holder 14 by applying adhesive AD. The image sensor IS is arranged on the carrier plate CR and is located on one image side of the imaging lens 10.

[0060] If the coefficient of thermal expansion of the tube 12 α-tube, the coefficient of thermal expansion of the arm 13 α-arm, the coefficient of thermal expansion of the holder 14 α-holder, the coefficient of thermal expansion of the holder 14 at 25 °C α-holder25, the coefficient of thermal expansion of the holder 14 at 50 °C α-holder50, and the coefficient of thermal expansion of the bracket 15 α-holder, the following conditions are met: α-holder < α-holder; 1.01 ≤ α-holder50 / α-holder25 ≤ 3.63; 30 ppm / °C < α-holder; α-holder < 240 ppm / °C; α-holder ≤ α-arm; and α-holder < α-arm ≤ α-tube < α-holder. Note that the values ​​in Tables 1 and 2 above can be chosen as values ​​for α-tube, α-holder, α-holder25, α-holder50 and α-holder, and that α-arm and α-tube can have the same value.

[0061] If the coefficient of thermal expansion of the tube 12 at 25 °C is α-Tube25 and the coefficient of thermal expansion of the bracket 15 at 25 °C is α-Bracket25, then the following condition is met: α-Bracket25 < α-Tube25.

[0062] If a distance between the optical axis 111 and a side of the first contact surface 141 close to the second contact surface 151 is D-1 to the center, and a distance between the optical axis 111 and a side of the second contact surface 151 close to the first contact surface 141 is D-2 to the center, the following conditions are met: D-1 to the center = 6.45 mm; D-2 ​​to the center = 6.7 mm; |D-1 to the center - D-2 to the center = 0.25 mm; and D-1 to the center - D-2 to the center / (D-1 to the center + D-2 to the center) = 0.019.

[0063] If the distance between arm 13 and the object end of tube 12 is D-arm upwards and the distance between arm 13 and the forming end of tube 12 is D-arm downwards, the following conditions are met: D-arm upwards = 0.67 mm; D-arm downwards = 5.98 mm; and D-arm upwards < D-arm downwards.

[0064] If a thickness of the tube 12 along a direction parallel to the optical axis 111 is T-tube and a thickness of the arm 13 parallel to the optical axis 111 between the first contact surface 141 and the second contact surface 151 is T-arm, the following conditions are met: T-tube = 7.15 mm; T-arm = 0.5 mm; and T-arm / T-tube = 0.0699.

[0065] The holder 14 further comprises a first recess surface 142, which faces the arm 13. The first recess surface 142 is adjacent to the first contact surface 141 and spaced apart from the arm 13. If the distance between the first recess surface 142 and the arm 13 is parallel to the optical axis 111, the following condition is met: G-holder = 0.015 mm. A gap formed between the first recess surface 142 and the arm 13 corresponds to the second contact surface 151 in a direction parallel to the optical axis 111.

[0066] The bracket 15 further comprises a mounting section 15a, which is attached to the holder 14, and the bracket 15 is connected to the holder 14 by the mounting section 15a. The mounting section 15a and the holder 14 have matching convex-concave shapes at their respective mounted positions. If the thickness of the arm 13 parallel to the optical axis 111 between the first contact surface 141 and the second contact surface 151 is T-arm, and a length parallel to the optical axis 111 between the second contact surface 151 and the mounting section 15a is L-2, then the following conditions are met: T-arm = 0.5 mm; L-2 for mounting = 2.5 mm; and T-arm / L-2 for mounting = 0.2.

[0067] If a length of the first contact surface 141 along a plane parallel to the optical axis 111 is L-holder and a length of the second contact surface 151 along a plane parallel to the optical axis is L-holder, the following conditions are met: L-holder = 0.35 mm; L-holder = 0.35 mm; and L-holder / L-holder = 1.

[0068] The holder 14 further comprises an inner surface 14a, which faces the optical axis 111. The inner surface 14a and the tube 12 form an air gap AG between them. The air gap AG overlaps the lens elements 11 along a direction perpendicular to the optical axis 111. 2. Design

[0069] See Fig. 4 to Fig. 5, where Fig. 4 a cross-sectional view of an imaging lens according to the 2nd embodiment of the present disclosure is and Fig. 5 an enlarged view of the CC area of ​​the imaging lens Fig. 4 is.

[0070] In this embodiment, a camera module 2 comprises an imaging lens 20 and an image acquisition assembly 2a.

[0071] The imaging lens 20 comprises a plurality of lens elements 21, a tube 22, an arm 23, a holder 24, a bracket 25 and a connector 26. The lens elements 21 form a lens assembly (unnumbered).

[0072] The lens elements 21 have an optical axis 211. The lens elements 21 are arranged along the optical axis 211. The tube 22 accommodates (or carries) the lens elements 21. Note that the number and shapes of the lens elements 21 shown in the drawings are only exemplary, and some contours have been omitted so as not to obscure the present disclosure. The present disclosure is not limited to the number and shapes of the lens elements 21 in the drawings.

[0073] The arm 23 is arranged on one side of the tube 22, pointing away from the optical axis 211. The arm 23 extends from the tube 22 in a direction away from the optical axis 211. In this embodiment, the arm 23 is structurally attached to the tube 22 via the connector 26 formed on the arm 23. The connector 26 and the tube 22 have matching convex-concave shapes at their respective fixed positions, with adhesive AD applied to one object side of their fixed positions to secure the connection between the connector 26 and the tube 22. In this embodiment, the distance between the arm 23 and an object end of the tube 22 is smaller than the distance between the arm 23 and an image end of the tube 22.

[0074] The holder 24 has a first contact surface 241 which overlaps and is in contact with the arm 23 in a direction parallel to the optical axis 211.

[0075] The bracket 25 is attached to the holder 24 by a structural fastening. The bracket 25 has a second contact surface 251 that overlaps and is in contact with the arm 23 in a direction parallel to the optical axis 211. The second contact surface 251 is located on the opposite side of the first contact surface 241. The bracket 25 rests against the arm 23 via the second contact surface 251, thus keeping the arm 23 in constant contact with the first contact surface 241.

[0076] In the imaging lens 20, the arm 23 is arranged between the holder 24 and the mount 25, the mount 24 and the mount 25 being made of different materials. The first contact surface 241 and the second contact surface 251 surround the optical axis 211 and do not overlap in a direction parallel to the optical axis 211.

[0077] The image acquisition assembly 2a comprises a carrier plate CR, an image sensor IS, a filter holder FC, and a filter FT. The image sensor IS is mounted on the carrier plate CR and is located on one image side of the imaging lens 20. The filter holder FC is mounted on the carrier plate CR and attached to the holder 24 by applying adhesive AD. The filter FT is mounted on the filter holder FC and is located on the object side of the image sensor IS.

[0078] If a coefficient of thermal expansion of tube 22 α-tube, a coefficient of thermal expansion of arm 23 α-arm, a coefficient of thermal expansion of holder 24 α-holder, a coefficient of thermal expansion of holder 24 at 25 °C α-holder25, a coefficient of thermal expansion of holder 24 at 50 °C α-holder50, and a coefficient of thermal expansion of holder 25 α-holder, the following conditions are met: α-holder < α-holder; 1.01 ≤ α-holder50 / α-holder25 ≤ 3.63; 30 ppm / °C < α-holder; α-holder < 240 ppm / °C; α-holder ≤ α-arm; and α-holder < α-arm ≤ α-tube < α-holder. Note that the values ​​in Tables 1 and 2 above can be chosen as the values ​​for α-tube, α-holder, α-holder25, α-holder50, and α-holder, and that α-arm and α-cylinder can have the same value.

[0079] If the coefficient of thermal expansion of the tube 22 at 25 °C is α-tube25 and the coefficient of thermal expansion of the bracket 25 at 25 °C is α-bracket25, then the following condition is met: α-bracket25 < α-tube25.

[0080] If a distance between the optical axis 211 and a side of the first contact surface 241 close to the second contact surface 251 is D-1 to the center, and a distance between the optical axis 211 and a side of the second contact surface 251 close to the first contact surface 241 is D-2 to the center, the following conditions are met: D-1 to the center = 5.6 mm; D-2 ​​to the center = 6.489 mm; |D-1 to the center - D-2 to the center = 0.889 mm; and D-1 to the center - D-2 to the center / (D-1 to the center + D-2 to the center) = 0.0735.

[0081] If the distance between arm 23 and the object end of tube 22 is D-arm upwards and the distance between arm 23 and the forming end of tube 22 is D-arm downwards, the following conditions are met: D-arm upwards = 0.67 mm; D-arm downwards = 5.98 mm; and D-arm upwards < D-arm downwards.

[0082] If a thickness of the tube 22 along a direction parallel to the optical axis 211 is T-tube and a thickness of the arm 23 parallel to the optical axis 211 between the first contact surface 241 and the second contact surface 251 is T-arm, the following conditions are met: T-tube = 6.245 mm; T-arm = 0.45 mm; and T-arm / T-tube = 0.0721.

[0083] The holder 25 further comprises a second recessed surface 252, which is located adjacent to the second contact surface 251 and spaced apart from the arm 23. If the distance between the second recessed surface 252 and the arm 23 (G-holder) is parallel to the optical axis 211, the following condition is met: G-holder = 0.02 mm.

[0084] The bracket 25 further comprises a mounting section 25a, which is attached to the holder 24, and the bracket 25 is connected to the holder 24 by the mounting section 25a. The mounting section 25a and the holder 24 have matching snap-fit ​​connection structures at their respective mounted positions. If the thickness of the arm 23 parallel to the optical axis 211 between the first contact surface 241 and the second contact surface 251 is T-arm, and a length parallel to the optical axis 211 between the second contact surface 251 and the mounting section 25a is L-2formounting, the following conditions are met: T-arm = 0.45 mm; L-2formounting = 5.42 mm; and T-arm / L-2formounting = 0.083.

[0085] If a length of the first contact surface 241 along a plane parallel to the optical axis 211 is L-holder and a length of the second contact surface 251 along a plane parallel to the optical axis is L-holder, the following conditions are met: L-holder = 0.73 mm; L-holder = 0.56 mm; and L-holder / L-holder = 0.767.

[0086] The holder 24 further comprises an inner surface 24a, which faces the optical axis 211. The inner surface 24a and the tube 22 form an air gap AG between them. The air gap AG overlaps with the lens elements 21 along a direction perpendicular to the optical axis 211. 3. Design

[0087] See Fig. 6 to Fig. 7, wherein Fig. 6 a cross-sectional view of an imaging lens according to the 3rd embodiment of the present disclosure is and Fig. 7 an enlarged view of the DD area of ​​the imaging lens Fig. 6 is.

[0088] A camera module 3 provided in this embodiment comprises an imaging lens 30 and an image acquisition assembly 3a.

[0089] The imaging lens 30 comprises a plurality of lens elements 31, a tube 32, an arm 33, a holder 34 and a bracket 35. The lens elements 31 form a lens assembly (numbered).

[0090] The lens elements 31 have an optical axis 311. The lens elements 31 are arranged along the optical axis 311. The tube 32 accommodates (or carries) the lens elements 31. Note that the number and shapes of the lens elements 31 shown in the drawings are only exemplary, and some contours have been omitted so as not to obscure the present disclosure. The present disclosure is not limited to the number and shape of the lens elements 31 in the drawings.

[0091] The arm 33 is arranged on one side of the tube 32, away from the optical axis 311. The arm 33 extends from the tube 32 in a direction away from the optical axis 311. In this embodiment, the arm 33 is formed integrally with the tube 32, and the boundary between the arm 33 and the tube 32 is defined in Fig. Figure 6 is represented by dashed lines to distinguish the arm 33 from the tube 32. In this embodiment, the distance between the arm 33 and an object end of the tube 32 is smaller than the distance between the arm 33 and an image-forming end of the tube 32.

[0092] The holder 34 is configured such that the tube 32 is arranged on it in such a way that the tube 32 corresponds to the image acquisition assembly 3a. The holder 34 has a first contact surface 341 that overlaps the arm 33 in a direction parallel to the optical axis 311 and is in contact with it.

[0093] The bracket 35 is attached to the holder 34 by a structural fastening. The bracket 35 has a second contact surface 351 that overlaps and is in contact with the arm 33 in a direction parallel to the optical axis 311. The second contact surface 351 is located on the opposite side of the first contact surface 341. The bracket 35 rests against the arm 33 via the second contact surface 351, thus keeping the arm 33 in constant contact with the first contact surface 341.

[0094] In the imaging lens 30, the arm 33 is arranged between the holder 34 and the mount 35, and the holder 34 and the mount 35 are made of different materials. The first contact surface 341 and the second contact surface 351 surround the optical axis 311 and do not overlap in a direction parallel to the optical axis 311.

[0095] The image acquisition assembly 3a comprises a carrier plate CR and an image sensor IS. The carrier plate CR is attached to the holder 34 by screws SC. The image sensor IS is arranged on the carrier plate CR and is positioned on one image side of the imaging lens 30.

[0096] If the coefficient of thermal expansion of tube 32 is α-tube, the coefficient of thermal expansion of arm 33 is α-arm, the coefficient of thermal expansion of holder 34 is α-holder, the coefficient of thermal expansion of holder 34 at 25 °C is α-holder25, the coefficient of thermal expansion of holder 34 at 50 °C is α-holder50, and the coefficient of thermal expansion of holder 35 is α-holder, then the following conditions are met: α-holder < α-holder; 1.01 ≤ α-holder50 / α-holder25 ≤ 3.63; 30 ppm / °C < α-holder; α-holder < 240 ppm / °C; α-holder ≤ α-arm; and α-holder < α-arm ≤ α-tube < α-holder. It is understood that the values ​​in Tables 1 and 2 above can be chosen as values ​​for α-tube, α-holder, α-holder25, α-holder50, and α-holder, and that α-arm and α-tube can have the same value.

[0097] If the coefficient of thermal expansion of the tube 32 at 25 °C is α-tube25 and the coefficient of thermal expansion of the bracket 35 at 25 °C is α-bracket25, then the following condition is met: α-bracket25 < α-tube25.

[0098] If a distance between the optical axis 311 and a side of the first contact surface 341 close to the second contact surface 351 is D-1 to the center, and a distance between the optical axis 311 and a side of the second contact surface 351 close to the first contact surface 341 is D-2 to the center, the following conditions are met: D-1 to the center = 6.6 mm; D-2 ​​to the center = 6 mm; |D-1 to the center - D-2 to the center = 0.6 mm; and |D-1 to the center - D-2 to the center / (D-1 to the center + D-2 to the center) = 0.0476.

[0099] If the distance between arm 33 and the object end of tube 32 is D-arm upwards and the distance between arm 33 and the forming end of tube 32 is D-arm downwards, the following conditions are met: D-arm upwards = 0.67 mm; D-arm downwards = 5.98 mm; and D-arm upwards < D-arm downwards.

[0100] If a thickness of the tube 32 along a direction parallel to the optical axis 311 is T-tube and a thickness of the arm 33 parallel to the optical axis 311 between the first contact surface 341 and the second contact surface 351 is T-arm, the following conditions are met: T-tube = 7.15 mm; T-arm = 0.5 mm; and T-arm / T-tube = 0.0699.

[0101] The holder 34 further comprises a first recess surface 342, which faces the arm 33. The first recess surface 342 is adjacent to the first contact surface 341 and spaced apart from the arm 33. If the distance between the first recess surface 342 and the arm 33 is parallel to the optical axis 311, the following condition is met: G-holder = 0.015 mm.

[0102] The holder 35 further comprises a second recess surface 352, which is located adjacent to the second contact surface 351 and spaced apart from the arm 33. If the distance between the second recess surface 352 and the arm 33 (G-holder) is parallel to the optical axis 311, the following condition is met: G-holder = 0.015 mm.

[0103] The bracket 35 further comprises a mounting section 35a, which is attached to the holder 34, and the bracket 35 is connected to the holder 34 by the mounting section 35a. The mounting section 35a and the holder 34 have matching convex-concave shapes at their respective mounted positions. If the thickness of the arm 33 parallel to the optical axis 311 between the first contact surface 341 and the second contact surface 351 is T-arm, and a length parallel to the optical axis 311 between the second contact surface 351 and the mounting section 35a is L-2formounting, the following conditions are met: T-arm = 0.5 mm; L-2formounting = 0.91 mm; and T-arm / L-2formounting = 0.549.

[0104] If a length of the first contact surface 341 along a plane parallel to the optical axis 311 is L-holder and a length of the second contact surface 351 along a plane parallel to the optical axis is L-holder, the following conditions are met: L-holder = 0.45 mm; L-holder = 2 mm; and L-holder / L-holder = 4.44. 4. Design

[0105] See Fig. 8 to Fig. 9, wherein Fig. 8 a cross-sectional view of an imaging lens according to the 4th embodiment of the present disclosure is and Fig. 9 an enlarged view of the EE area of ​​the imaging lens Fig. 8 is.

[0106] A camera module 4 provided in this embodiment comprises an imaging lens 40 and an image acquisition assembly 4a.

[0107] The imaging lens 40 comprises a plurality of lens elements 41, a tube 42, an arm 43, a holder 44, and a mount 45. The lens elements 41 form a lens assembly (unnumbered).

[0108] The lens elements 41 have an optical axis 411. The lens elements 41 are arranged along the optical axis 411. The tube 42 accommodates (or carries) the lens elements 41. Note that the number and shapes of the lens elements 41 shown in the drawings are only exemplary, and some contours have been omitted so as not to obscure the present disclosure. The present disclosure is not limited to the number and shapes of the lens elements 41 in the drawings.

[0109] The arm 43 is arranged on one side of the tube 42, pointing away from the optical axis 411. The arm 43 extends from the tube 42 in a direction away from the optical axis 411. In this embodiment, the arm 43 is formed integrally with the tube 42, and the boundary between the arm 43 and the tube 42 is defined in Fig. Figure 8 is represented by dashed lines to distinguish the arm 43 from the tube 42. In this embodiment, the distance between the arm 43 and an object end of the tube 42 is smaller than the distance between the arm 43 and an image end of the tube 42.

[0110] The holder 44 has a first contact surface 441 which overlaps and is in contact with the arm 43 in a direction parallel to the optical axis 411.

[0111] The bracket 45 is attached to the bracket 44 by a structural fastening, with adhesive AD applied between them to ensure a firm connection. The bracket 45 has a second contact surface 451 that overlaps and is in contact with the arm 43 in a direction parallel to the optical axis 411. The second contact surface 451 is located on the opposite side of the first contact surface 441. The bracket 45 rests against the arm 43 via the second contact surface 451 to keep the arm 43 in constant contact with the first contact surface 441.

[0112] In the imaging lens 40, the arm 43 is arranged between the holder 44 and the mount 45, the holder 44 and the mount 45 being made of different materials. The first contact surface 441 and the second contact surface 451 surround the optical axis 411 and do not overlap in a direction parallel to the optical axis 411.

[0113] The image acquisition assembly 4a comprises a carrier plate CR, an image sensor IS, a filter carrier FC, and a filter FT. The carrier plate CR is attached to the holder 44 by applying adhesive AD. The image sensor IS is mounted on the carrier plate CR and is located on one image side of the imaging lens 40. The filter carrier FC is mounted on the carrier plate CR. The filter FT is mounted on the filter carrier FC and is located on the object side of the image sensor IS.

[0114] If the coefficient of thermal expansion of tube 42 is α-tube, the coefficient of thermal expansion of arm 43 is α-arm, the coefficient of thermal expansion of holder 44 is α-holder, the coefficient of thermal expansion of holder 44 at 25 °C is α-holder25, the coefficient of thermal expansion of holder 44 at 50 °C is α-holder50, and the coefficient of thermal expansion of holder 45 is α-holder, then the following conditions are met: α-holder < α-holder; 1.01 ≤ α-holder50 / α-holder25 ≤ 3.63; 30 ppm / °C < α-holder; α-holder < 240 ppm / °C; α-holder ≤ α-arm; and α-holder < α-arm ≤ α-tube < α-holder. Note that the values ​​in Tables 1 and 2 above can be chosen as the values ​​for α-tube, α-holder, α-holder25, α-holder50, and α-holder, and that α-arm and α-tube can have the same value.

[0115] If the coefficient of thermal expansion of the tube 42 at 25 °C is α-tube25 and the coefficient of thermal expansion of the bracket 45 at 25 °C is α-bracket25, then the following condition is met: α-bracket25 < α-tube25.

[0116] If a distance between the optical axis 411 and a side of the first contact surface 441 close to the second contact surface 451 is D-1 to the center, and a distance between the optical axis 411 and a side of the second contact surface 451 close to the first contact surface 441 is D-2 to the center, the following conditions are met: D-1 to the center = 5.84 mm; D-2 ​​to the center = 6.4 mm; |D-1 to the center - D-2 to the center = 0.56 mm; and D-1 to the center - D-2 to the center / (D-1 to the center + D-2 to the center) = 0.0458.

[0117] If the distance between arm 43 and the object end of tube 42 is D-arm upwards and the distance between arm 43 and the forming end of tube 42 is D-arm downwards, the following conditions are met: D-arm upwards = 0.67 mm; D-arm downwards = 5.98 mm; and D-arm upwards < D-arm downwards.

[0118] If a thickness of the tube 42 along a direction parallel to the optical axis 411 is T-tube and a thickness of the arm 43 parallel to the optical axis 411 between the first contact surface 441 and the second contact surface 451 is T-arm, the following conditions are met: T-tube = 7.15 mm; T-arm = 0.65 mm; and T-arm / T-tube = 0.0910.

[0119] The arm 43 has a bending surface 43a that is located closer to the optical axis 411 than the first contact surface 441 and the second contact surface 451. If the minimum thickness of the arm 43 at the bending surface 43a is T-bend along a direction parallel to the optical axis 411, and the thickness of the arm 43 parallel to the optical axis 411 between the first contact surface 441 and the second contact surface 451 is T-arm, the following conditions are met: T-bend = 0.5 mm; T-arm = 0.65 mm; and T-bend / T-arm = 0.769. The thickness of the arm 43 along a direction parallel to the optical axis 411 gradually increases from the position where the bending surface 43a is located to the position where the first contact surface 441 is located.

[0120] The holder 44 further comprises a first recess surface 442, which faces the arm 43. The first recess surface 442 is adjacent to the first contact surface 441 and spaced apart from the arm 43. If the distance between the first recess surface 442 and the arm 43 is parallel to the optical axis 411, the following condition is met: G-holder = 0.017 mm. A gap formed between the first recess surface 442 and the arm 43 corresponds to the second contact surface 451 in a direction parallel to the optical axis 411.

[0121] The bracket 45 further comprises a mounting section 45a, which is attached to the holder 44, and the bracket 45 is connected to the holder 44 by the mounting section 45a. The mounting section 45a and the holder 44 have matching snap-fit ​​connection structures at their respective mounted positions. If the thickness of the arm 43 parallel to the optical axis 411 between the first contact surface 441 and the second contact surface 451 is T-arm, and a length parallel to the optical axis 411 between the second contact surface 451 and the mounting section 45a is L-2formounting, the following conditions are met: T-arm = 0.65 mm; L-2formounting = 2.66 mm; and T-arm / L-2formounting = 0.244.

[0122] If a length of the first contact surface 441 along a plane parallel to the optical axis 411 is L-holder and a length of the second contact surface 451 along a plane parallel to the optical axis is L-holder, the following conditions are met: L-holder = 0.67 mm; L-holder = 0.45 mm; and L-holder / L-holder = 0.672.

[0123] The holder 44 further comprises an inner surface 44a, which faces the optical axis 411. The inner surface 44a and the tube 42 form an air gap AG between them. The air gap AG overlaps the lens elements 41 along a direction perpendicular to the optical axis 411. The air gap AG is also formed between the arm 43 and the holder 44. 5. Design

[0124] See Fig. 10 to Fig. 11, where Fig. 10 a cross-sectional view of an imaging lens according to the 5th embodiment of the present disclosure is and Fig. 11 an enlarged view of area FF of the imaging lens from Fig. 10 is.

[0125] A camera module 5 provided in this embodiment comprises an imaging lens 50 and an image acquisition assembly 5a.

[0126] The imaging lens 50 comprises a plurality of lens elements 51, a tube 52, an arm 53, a holder 54, a bracket 55 and a connector 56. The lens elements 51 form a lens assembly (unnumbered).

[0127] The lens elements 51 have an optical axis 511. The lens elements 51 are arranged along the optical axis 511. The tube 52 accommodates (or carries) the lens elements 51. Note that the number and shape of the lens elements 51 shown in the drawings are only exemplary, and some contours have been omitted so as not to obscure the present disclosure. The present disclosure is not limited to the number and shapes of the lens elements 51 in the drawings.

[0128] The arm 53 is arranged on one side of the tube 52, pointing away from the optical axis 511. The arm 53 extends from the tube 52 in a direction away from the optical axis 511. In this embodiment, the arm 53 is attached to the tube 52 by applying adhesive AD to the connector 56 formed on the arm 53. In this embodiment, the distance between the arm 53 and an object end of the tube 52 is smaller than the distance between the arm 53 and an image end of the tube 52.

[0129] The holder 54 is equipped such that the tube 52 is arranged on it in such a way that the tube 52 corresponds to the image acquisition assembly 5a. The holder 54 has a first contact surface 541 which overlaps the arm 53 in a direction parallel to the optical axis 511 and is in contact with it.

[0130] The bracket 55 is attached to the bracket 54 by a structural fastening. The bracket 55 has a second contact surface 551 that overlaps and is in contact with the arm 53 in a direction parallel to the optical axis 511. The second contact surface 551 is located on the opposite side of the first contact surface 541. The bracket 55 rests against the arm 53 via the second contact surface 551 to keep the arm 53 in constant contact with the first contact surface 541.

[0131] The connector 56 surrounds the optical axis 511 and forms a light-transmitting hole LH, which is located at a position where the aperture of the imaging lens 50 is located.

[0132] In the imaging lens 50, the arm 53 is arranged between the holder 54 and the mount 55, the holder 54 and the mount 55 being made of different materials. The first contact surface 541 and the second contact surface 551 surround the optical axis 511 and do not overlap in a direction parallel to the optical axis 511.

[0133] The image acquisition assembly 5a comprises a carrier plate CR, an image sensor IS, and a filter FT. The holder 54 is arranged through the carrier plate CR. The image sensor IS is arranged on the carrier plate CR and is positioned on one image side of the imaging lens 50. The filter FT is positioned on one object side of the image sensor IS.

[0134] If the coefficient of thermal expansion of tube 52 is α-tube, the coefficient of thermal expansion of arm 53 is α-arm, the coefficient of thermal expansion of holder 54 is α-holder, the coefficient of thermal expansion of holder 54 at 25 °C is α-holder25, the coefficient of thermal expansion of holder 54 at 50 °C is α-holder50, and the coefficient of thermal expansion of holder 55 is α-holder, then the following conditions are met: α-holder < α-holder; 1.01 ≤ α-holder50 / α-holder25 ≤ 3.63; 30 ppm / °C < α-holder; α-holder < 240 ppm / °C; α-holder ≤ α-arm; and α-holder < α-arm ≤ α-tube < α-holder. Note that the values ​​in Tables 1 and 2 above can be chosen as the values ​​for α-tube, α-holder, α-holder25, α-holder50, and α-holder, and that α-arm and α-cylinder can have the same value.

[0135] If the coefficient of thermal expansion of the tube 52 at 25 °C is α-tube25 and the coefficient of thermal expansion of the bracket 55 at 25 °C is α-bracket25, then the following condition is met: α-bracket25 < α-tube25.

[0136] If a distance between the optical axis 511 and a side of the first contact surface 541 close to the second contact surface 551 is D-1 to the center, and a distance between the optical axis 511 and a side of the second contact surface 551 close to the first contact surface 541 is D-2 to the center, the following conditions are met: D-1 to the center = 6.55 mm; D-2 ​​to the center = 6.85 mm; |D-1 to the center - D-2 to the center = 0.3 mm; and D-1 to the center - D-2 to the center / (D-1 to the center + D-2 to the center) = 0.0224.

[0137] If the distance between arm 53 and the object end of tube 52 is D-arm upwards and the distance between arm 53 and the image end of tube 52 is D-arm downwards, the following conditions are met: D-arm upwards = 0.67 mm; D-arm downwards = 5.965 mm; and D-arm upwards < D-arm downwards.

[0138] If a thickness of the tube 52 along a direction parallel to the optical axis 511 is T-tube and a thickness of the arm 53 parallel to the optical axis 511 between the first contact surface 541 and the second contact surface 551 is T-arm, the following conditions are met: T-tube = 6.49 mm; T-arm = 0.515 mm; and T-arm / T-tube = 0.0794.

[0139] The arm 53 has a bending surface 53a that is located closer to the optical axis 511 than the first contact surface 541 and the second contact surface 551. If the minimum thickness of the arm 53 at the bending surface 53a is T-bend along a direction parallel to the optical axis 511, and the thickness of the arm 53 parallel to the optical axis 511 between the first contact surface 541 and the second contact surface 551 is T-arm, the following conditions are met: T-bend = 0.3 mm; T-arm = 0.515 mm; and T-bend / T-arm = 0.583. The thickness of the arm 53 along a direction parallel to the optical axis 511 gradually increases from the position where the bending surface 53a is located to the position where the first contact surface 541 is located.

[0140] The holder 54 further comprises a first recess surface 542, which faces the arm 53. The first recess surface 542 is adjacent to the first contact surface 541 and spaced apart from the arm 53. If a distance parallel to the optical axis 511 exists between the first recess surface 542 and the arm 53, the following condition is met: G-holder = 0.2 mm. A gap formed between the first recess surface 542 and the arm 53 corresponds to the second contact surface 551 in a direction parallel to the optical axis 511. The imaging lens 50 further comprises an insertion element 57, which is arranged between the first recess surface 542 and the arm 53, the insertion element 57 being in contact with the first recess surface 542 and the arm 53.

[0141] The bracket 55 further comprises a mounting section 55a, which is attached to the holder 54, and the bracket 55 is connected to the holder 54 by the mounting section 55a. The mounting section 55a and the holder 54 have matching convex-concave shapes at their respective mounted positions. If the thickness of the arm 53 parallel to the optical axis 511 between the first contact surface 541 and the second contact surface 551 is T-arm, and a length parallel to the optical axis 511 between the second contact surface 551 and the mounting section 55a is L-2formounting, the following conditions are met: T-arm = 0.515 mm; L-2formounting = 3.33 mm; and T-arm / L-2formounting = 0.155.

[0142] If a length of the first contact surface 541 along a plane parallel to the optical axis 511 is L-holder and a length of the second contact surface 551 along a plane parallel to the optical axis is L-holder, the following conditions are met: L-holder = 0.45 mm; L-holder = 0.2 mm; and L-holder / L-holder = 0.444. 6. Design

[0143] See Fig. 12 to Fig. 15, where Fig. 12 a cross-sectional view of an imaging lens according to the 6th embodiment of the present disclosure is, Fig. 13 an enlarged view of the GG area of ​​the imaging lens from Fig. 12 is, Fig. Figure 14 is a schematic view showing a corresponding arrangement of the elements of the imaging lens. Fig. 12 shows, and Fig. Figure 15 is a schematic view showing a corresponding arrangement of other elements of the imaging lens. Fig. 12 shows.

[0144] A camera module 6 provided in this embodiment comprises an imaging lens 60 and an image acquisition assembly 6a.

[0145] The imaging lens 60 comprises a plurality of lens elements 61, a tube 62, an arm 63, a holder 64, and a mount 65. The lens elements 61 form a lens assembly (unnumbered).

[0146] The lens elements 61 have an optical axis 611. The lens elements 61 are arranged along the optical axis 611. The tube 62 accommodates (or supports) the lens elements 61. It can also be considered that the tube 62 has a cylindrical wall 621 that surrounds the lens elements 61. Note that the number and shape of the lens elements 61 shown in the drawings are only exemplary, and some contours have been omitted so as not to obscure the present disclosure. The present disclosure is not limited to the number and shapes of the lens elements 61 in the drawings.

[0147] The arm 63 is arranged on one side of the tube 62, extending away from the optical axis 611. The arm 63 extends from the cylindrical wall 621 of the tube 62 in a direction away from the optical axis 611. In this embodiment, the arm 63 is formed integrally with the tube 62, and the boundary between the arm 63 and the tube 62 is defined in Fig. Figure 12 shows the arm 63 as shown by dashed lines to distinguish it from the tube 62. In this embodiment, the distance between the arm 63 and an object end of the tube 62 is smaller than the distance between the arm 63 and an image end of the tube 62. The arm 63 has an upper arm surface 631 facing an object side and a lower arm surface 632 facing an image side.

[0148] The holder 64 is configured such that the cylindrical wall 621 of the tube 62 is arranged on it so that the tube 62 corresponds to the image acquisition assembly 6a. The holder 64 has a first contact surface 641 that overlaps and is in contact with the arm 63 in a direction parallel to the optical axis 611. See Fig. Figure 15, which is a schematic representation showing a corresponding arrangement of the overlapping first contact surface 641 and the arm 63. The first contact surface 641 is in a loop shape that surrounds the optical axis 611. Note that in Fig. 15 only the part of the holder 64 which forms the first contact surface 641 is shown, in order to clearly illustrate the corresponding arrangement of the components.

[0149] The holder 64 has a reinforcing element 6406 which overlaps with the first contact surface 641 in a direction parallel to the optical axis 611.

[0150] The bracket 65 is attached to the holder 64 by a structural fastening, with an adhesive AD applied between them to ensure a firm connection. The bracket 65 has a second contact surface 651 that overlaps and is in contact with the arm 63 in a direction parallel to the optical axis 611. See Fig. Figure 14, which is a schematic representation showing a corresponding arrangement of the overlapping second contact surface 651 and the arm 63. The second contact surface 651 is in a loop shape that surrounds the optical axis 611. Note that in Fig. Figure 14 shows only the part of the holder 65 that forms the second contact surface 651, in order to clearly illustrate the corresponding arrangement of the components. See Fig. 12 and Fig. 13: The second contact surface 651 is located on the opposite side of the first contact surface 641. The bracket 65 rests against the arm 63 via the second contact surface 651, thus keeping the arm 63 in constant contact with the first contact surface 641. Furthermore, the bracket 65 rests against the upper surface of the arm 631 and, as mentioned above, forms the second contact surface 651.

[0151] In the imaging lens 60, the arm 63 is arranged between the holder 64 and the mount 65, and one of the arm 63, the holder 64, and the mount 65 is made of a material different from that of the other two. The first contact surface 641 and the second contact surface 651 surround the optical axis 611 and do not overlap in a direction parallel to the optical axis 611.

[0152] The image acquisition assembly 6a comprises a carrier plate CR, an image sensor IS, and a filter FT. The carrier plate CR is attached to the holder 64 by applying adhesive AD. The image sensor IS is positioned on the carrier plate CR and is located on one image side of the imaging lens 60. The filter FT is located on one object side of the image sensor IS.

[0153] If the coefficient of thermal expansion of tube 62 is α-tube, the coefficient of thermal expansion of arm 63 is α-arm, the coefficient of thermal expansion of holder 64 is α-holder, the coefficient of thermal expansion of holder 64 at 25 °C is α-holder25, the coefficient of thermal expansion of holder 64 at 50 °C is α-holder50, and the coefficient of thermal expansion of holder 65 is α-holder, then the following conditions are met: α-holder < α-holder; 1.01 ≤ α-holder50 / α-holder25 ≤ 3.63; 30 ppm / °C < α-holder; α-holder < 240 ppm / °C; α-holder ≤ α-arm; and α-holder < α-arm ≤ α-tube < α-holder. Note that the values ​​in Tables 1 and 2 above can be chosen as the values ​​for α-tube, α-holder, α-holder25, α-holder50, and α-holder, and that α-arm and α-tube can have the same value.

[0154] If the coefficient of thermal expansion of the tube 62 at 25 °C is α-tube25 and the coefficient of thermal expansion of the bracket 65 at 25 °C is α-bracket25, then the following condition is met: α-bracket25 < α-tube25.

[0155] If a distance between the optical axis 611 and a side of the first contact surface 641 close to the second contact surface 651 is D-1 to the center, and a distance between the optical axis 611 and a side of the second contact surface 651 close to the first contact surface 641 is D-2 to the center, the following conditions are met: D-1 to the center = 5.07 mm; D-2 ​​to the center = 5.6 mm; |D-1 to the center - D-2 to the center = 0.53 mm; and D-1 to the center - D-2 to the center / (D-1 to the center + D-2 to the center) = 0.0497.

[0156] If the distance between arm 63 and the object end of tube 62 is D-arm upwards and the distance between arm 63 and the image end of tube 62 is D-arm downwards, the following conditions are met: D-arm upwards = 0.455 mm; D-arm downwards = 5.15 mm; and D-arm upwards < D-arm downwards.

[0157] If a thickness of the tube 62 along a direction parallel to the optical axis 611 is T-tube and a thickness of the arm 63 parallel to the optical axis 611 between the first contact surface 641 and the second contact surface 651 is T-arm, the following conditions are met: T-tube = 6.255 mm; T-arm = 0.65 mm; and T-arm / T-tube = 0.104.

[0158] The arm 63 has a bending surface 63a that is located closer to the optical axis 611 than the first contact surface 641 and the second contact surface 651. If the minimum thickness of the arm 63 at the bending surface 63a is T-bend along a direction parallel to the optical axis 611, and the thickness of the arm 63 parallel to the optical axis 611 between the first contact surface 641 and the second contact surface 651 is T-arm, the following conditions are met: T-bend = 0.3 mm; T-arm = 0.65 mm; and T-bend / T-arm = 0.462. The thickness of the arm 63 along a direction parallel to the optical axis 611 gradually increases from the position where the bending surface 63a is located to the position where the first contact surface 641 is located.

[0159] The holder 64 further comprises a first recess surface 642, which faces the arm 63. The first recess surface 642 is adjacent to the first contact surface 641 and spaced apart from the arm 63. If a distance parallel to the optical axis 611 exists between the first recess surface 642 and the arm 63, the following condition is met: G-holder = 0.35 mm. A gap formed between the first recess surface 642 and the arm 63 corresponds to the second contact surface 651 in a direction parallel to the optical axis 611.

[0160] The bracket 65 further comprises a mounting section 65a, which is attached to the holder 64, and the bracket 65 is connected to the holder 64 by the mounting section 65a. The mounting section 65a and the holder 64 have matching convex-concave shapes at their respective mounted positions. If the thickness of the arm 63 parallel to the optical axis 611 between the first contact surface 641 and the second contact surface 651 is T-arm, and a length parallel to the optical axis 611 between the second contact surface 651 and the mounting section 65a is L-2formounting, the following conditions are met: T-arm = 0.65 mm; L-2formounting = 3.18 mm; and T-arm / L-2formounting = 0.204.

[0161] If a length of the first contact surface 641 along a plane parallel to the optical axis 611 is L-holder and a length of the second contact surface 651 along a plane parallel to the optical axis is L-holder, the following conditions are met: L-holder = 0.25 mm; L-holder = 0.23 mm; and L-holder / L-holder = 0.92.

[0162] In this embodiment, each of the first contact surface 641 and the second contact surface 651 is arranged in a loop shape that surrounds the optical axis 611. However, the present disclosure is not limited to this. See the 7th embodiment below. 7. Design

[0163] See Fig. 16 to Fig. 17, where Fig. 16 is a schematic view showing a corresponding arrangement of the elements of an imaging lens according to the 7th embodiment of the present disclosure, and Fig. Figure 17 is a schematic view showing a corresponding arrangement of other elements of the imaging lens. Fig. 16 shows.

[0164] A camera module 7 provided in this embodiment is similar to the camera module 6 provided in the 6th embodiment. Therefore, descriptions of the same or similar features between camera module 7 and camera module 6 are omitted.

[0165] In this embodiment, the arm 73 has two step structures (unnumbered) on one side of it, which is close to an image end of the tube 72. The step structures each have a recessed surface 73b. The holder (unnumbered) is spaced from the arm 73 at the recessed surface 73b, and the first contact surfaces 741 have a multi-arc shape surrounding the optical axis 711, as shown in Fig. 17 shown.

[0166] In this embodiment, one side of the arm 73, close to the tube 72, continues to overlap the second contact surface 751 of the holder (unnumbered) in a direction parallel to the optical axis 711, and the second contact surface 751 is in a loop shape surrounding the optical axis 711, as shown in Fig. 16 shown.

[0167] Note that in Fig. 16 and Fig. 17 only the part of the holder forming the first contact surface 741 and the part of the holder forming the second contact surface 751 are shown to clearly illustrate the corresponding arrangement of the components. 8. Design

[0168] See Fig. 18 to Fig. 21, whereby Fig. 18 a cross-sectional view of an imaging lens according to the 8th embodiment of the present disclosure is, Fig. 19 an enlarged view of area HH of the imaging lens from Fig. 18 is, Fig. 20 an exploded view of the imaging lens from Fig. 18 is and Fig. 21 another exploded view of the imaging lens from Fig. 18.

[0169] A camera module 8 provided in this embodiment comprises an imaging lens 80 and an image acquisition assembly 8a.

[0170] The imaging lens 80 comprises a plurality of lens elements 81, a tube 82, an arm 83, a holder 84 and a bracket 85. The lens elements 81 form a lens assembly (unnumbered).

[0171] The lens elements 81 have an optical axis 811. The lens elements 81 are arranged along the optical axis 811. The tube 82 accommodates (or carries) the lens elements 81. It can also be considered that the tube 82 has a cylindrical wall 821 that surrounds the lens elements 81. Note that the number and shape of the lens elements 81 shown in the drawings are only exemplary, and some contours have been omitted so as not to obscure the present disclosure. The present disclosure is not limited to the number and shapes of the lens elements 81 in the drawings.

[0172] The arm 83 is arranged on one side of the tube 82, extending away from the optical axis 811. The arm 83 extends from the cylindrical wall 821 of the tube 82 in a direction away from the optical axis 811. In this embodiment, the arm 83 is formed integrally with the tube 82, and the boundary between the arm 83 and the tube 82 is defined in Fig. Figure 12 shows the arm 83 as shown by dashed lines to distinguish it from the tube 82. In this embodiment, the distance between the arm 83 and an object end of the tube 82 is smaller than the distance between the arm 83 and an image end of the tube 82. The arm 83 has an upper arm surface 831 facing the object side and a lower arm surface 832 facing the image side.

[0173] The holder 84 is configured such that the cylindrical wall 821 of the tube 82 can be positioned on it so that the tube 82 corresponds to the image acquisition assembly 8a. The holder 84 has a first contact surface 841 that overlaps and is in contact with the arm 83 in a direction parallel to the optical axis 811. The first contact surface 841 is in a loop shape that surrounds the optical axis 811.

[0174] In particular, the holder 84 comprises a base 840a and a holder support 840b. The base 840a has a bottom section 8401 and a surrounding wall 8402. The bottom section 8401 has a lower surface 8401a facing the arm 83. The surrounding wall 8402 extends from the lower surface 8401a of the bottom section 8401 towards the arm 83, and the surrounding wall 8402 has a surrounding upper surface 8402a facing the arm 83 and a surrounding inner surface 8402b facing the tube 82.

[0175] The support bracket 840b is arranged at (or connected to) the base 840a. The support bracket 840b has the first contact surface 841 mentioned above. The support bracket 840b carries the tube 82 through the first contact surface 841 and the arm 83.

[0176] In particular, the holder carrier 840b has a reinforcing element 8406 and an extension section 8407. The reinforcing element 8406 overlaps the first contact surface 841 in a direction parallel to the optical axis 811. The reinforcing element 8406 comprises a first contact section 8406a, a connecting section 8406b, and a second contact section 8406c. The first contact section 8406a has a third contact surface 843. The first contact section 8406a rests against the surrounding upper surface 8402a of the surrounding wall 8402 via the third contact surface 843. The connecting section 8406b extends from the first contact section 8406a in a direction away from the arm 83. The second contact section 8406c is connected to the connecting section 8406b. The second plant section 8406c is located further away from arm 83 than the first plant section 8406a.Furthermore, the reinforcement element 8406 is arranged between the extension section 8407 and the surrounding wall 8402.

[0177] The extension section 8407 has a first end 8407a, which is connected to the second mounting section 8406c, and a second end 8407b, which extends from the first end 8407a towards the arm 83. The first end 8407a is in contact with the reinforcing element 8406 and forms a fourth contact surface 844, which is located further away from the arm 83 than the third contact surface 843. The second end 8407b is in contact with the lower arm surface 832 and forms the aforementioned first contact surface 841. Furthermore, the extension section 8407 is configured to move the first contact surface 841 of the holder 84 along a direction parallel to the optical axis 811.

[0178] The bracket 85 is attached to the holder 84 by a structural fastening, with adhesive AD applied between them to ensure a firm connection. The bracket 85 has a second contact surface 851 that overlaps and is in contact with the arm 83 in a direction parallel to the optical axis 811. The second contact surface 851 is in a loop shape that surrounds the optical axis 811. The second contact surface 851 is located on the opposite side of the first contact surface 841. The bracket 85 rests against the arm 83 via the second contact surface 851 to keep the arm 83 in constant contact with the first contact surface 841. In addition, the bracket 85 rests against the upper surface of the arm 831, forming the aforementioned second contact surface 851.

[0179] In the imaging lens 80, the arm 83 is arranged between the holder 84 and the mount 85, and one of the arm 83, the holder 84, and the mount 85 is made of a material different from that of the other two. The first contact surface 841 and the second contact surface 851 surround the optical axis 811 and do not overlap in a direction parallel to the optical axis 811.

[0180] The image acquisition assembly 8a comprises a carrier plate CR, an image sensor IS, and a filter FT. The carrier plate CR is attached to the holder 84 by adhesive application using adhesive AD. The image sensor IS is positioned on the carrier plate CR and is located on one image side of the imaging lens 80. The filter FT is located on one object side of the image sensor IS.

[0181] If the coefficient of thermal expansion of tube 82 is α-tube, the coefficient of thermal expansion of arm 83 is α-arm, the coefficient of thermal expansion of holder 84 is α-holder, the coefficient of thermal expansion of holder 84 at 25 °C is α-holder25, the coefficient of thermal expansion of holder 84 at 50 °C is α-holder50, and the coefficient of thermal expansion of bracket 85 is α-holder, then the following conditions are met: α-holder < α-holder; 1.01 ≤ α-holder50 / α-holder25 ≤ 3.63; 30 ppm / °C < α-holder; α-holder < 240 ppm / °C; α-holder ≤ α-arm; and α-holder < α-arm ≤ α-tube < α-holder. Note that the values ​​in Tables 1 and 2 above can be chosen as the values ​​for α-tube, α-holder, α-holder25, α-holder50, and α-holder, and that α-arm and α-tube can have the same value.

[0182] If the coefficient of thermal expansion of the tube 82 at 25 °C is α-tube25 and the coefficient of thermal expansion of the bracket 85 at 25 °C is α-bracket25, then the following condition is met: α-bracket25 < α-tube25.

[0183] If the coefficient of thermal expansion of the extension section 8407 α-extension and the coefficient of thermal expansion of the holder 85 at 25 °C α-holder25 is the following condition can be met: 30 ppm / °C ≤ α-extension-α-holder25 ≤ 240 ppm / °C.

[0184] If a distance between the optical axis 811 and a side of the first contact surface 841 close to the second contact surface 851 is D-1 to the center, and a distance between the optical axis 811 and a side of the second contact surface 851 close to the first contact surface 841 is D-2 to the center, the following conditions are met: D-1 to the center = 5.07 mm; D-2 ​​to the center = 5.6 mm; |D-1 to the center - D-2 to the center = 0.53 mm; and D-1 to the center - D-2 to the center / (D-1 to the center + D-2 to the center) = 0.0497.

[0185] If the distance between arm 83 and the object end of tube 82 is D-arm upwards and the distance between arm 83 and the forming end of tube 82 is D-arm downwards, the following conditions are met: D-arm upwards = 0.455 mm; D-arm downwards = 5.15 mm; and D-arm upwards < D-arm downwards.

[0186] If a thickness of the tube 82 along a direction parallel to the optical axis 811 is T-tube and a thickness of the arm 83 parallel to the optical axis 811 between the first contact surface 841 and the second contact surface 851 is T-arm, the following conditions are met: T-tube = 6.255 mm; T-arm = 0.65 mm; and T-arm / T-tube = 0.104.

[0187] The arm 83 has a bending surface 83a that is located closer to the optical axis 811 than the first contact surface 841 and the second contact surface 851. If the minimum thickness of the arm 83 at the bending surface 83a is T-bend along a direction parallel to the optical axis 811, and the thickness of the arm 83 parallel to the optical axis 811 between the first contact surface 841 and the second contact surface 851 is T-arm, the following conditions are met: T-bend = 0.3 mm; T-arm = 0.65 mm; and T-bend / T-arm = 0.462. The thickness of the arm 83 along a direction parallel to the optical axis 811 gradually increases from the position where the bending surface 83a is located to the position where the first contact surface 841 is located. The arm 83 further has a flat surface 83c which is perpendicular to the optical axis 811 and is located closer to the optical axis 811 than the bending surface 83a.The thickness of the arm 83 on the flat surface 83c along a direction parallel to the optical axis 811 is greater than the thickness of the arm 83 on the bending surface 83a along a direction parallel to the optical axis 811.

[0188] The first section 8406a of the holder 84 further comprises a first recess surface 842, which faces the arm 83. The first recess surface 842 is adjacent to the first contact surface 841 and spaced apart from the arm 83. If a distance parallel to the optical axis 811 exists between the first recess surface 842 and the arm 83, the following condition is met: G-holder = 0.1 mm. A gap formed between the first recess surface 842 and the arm 83 corresponds to the second contact surface 851 in a direction parallel to the optical axis 811.

[0189] The bracket 85 further comprises a mounting section 85a, which is attached to the holder 84, and the bracket 85 is connected to the holder 84 by the mounting section 85a. The mounting section 85a and the holder 84 have matching convex-concave shapes at their respective mounted positions. If the thickness of the arm 83 parallel to the optical axis 811 between the first contact surface 841 and the second contact surface 851 is T-arm, and a length parallel to the optical axis 811 between the second contact surface 851 and the mounting section 85a is L-2formounting, the following conditions are met: T-arm = 0.65 mm; L-2formounting = 3.18 mm; and T-arm / L-2formounting = 0.204.

[0190] If a length of the first contact surface 841 along a plane parallel to the optical axis 811 is L-holder and a length of the second contact surface 851 along a plane parallel to the optical axis is L-holder, the following conditions are met: L-holder = 0.25 mm; L-holder = 0.2378 mm; and L-holder / L-holder = 0.951.

[0191] If a length of the surrounding inner surface 8402b along a direction parallel to the optical axis 811 is L-side surface spoilage and a length of the lower surface 8401a along a direction parallel to the optical axis 811 is L-lower side surface, then the following condition is satisfied: L-side surface spoilage > L-lower side surface.

[0192] In this embodiment, each of the first contact surface 841 and the second contact surface 851 is arranged in a loop shape that surrounds the optical axis 811. However, the present disclosure is not limited to this. See the 9th embodiment below. 9. Design

[0193] See Fig. 22 to Fig. 23, where Fig. 22 is a schematic view showing a corresponding arrangement of the elements of an imaging lens according to the 9th embodiment of the present disclosure, and Fig. 23 is a schematic view showing a corresponding arrangement of other elements of the imaging lens. Fig. 22 shows.

[0194] A camera module 9 provided in this embodiment is similar to the camera module 8 provided in the 8th embodiment. Therefore, descriptions of the same or similar features between camera module 9 and camera module 8 are omitted.

[0195] In this embodiment, the number of arms 93 is four. The arms 93 are arranged uniformly on one side of the tube 92 away from the optical axis 911 in a circumferential direction around the optical axis 911, such that the Fig. The first contact surfaces 941 shown in Figure 23 are in a multi-arc shape surrounding the optical axis 911, and are located in Fig. The second contact surfaces 951 shown are in a multi-arc shape surrounding the optical axis 911.

[0196] Note that in Fig. 22 and Fig. 23 only the part of the holder (not numbered) that forms the first contact surface 941 and the part of the holder (not numbered) that forms the second contact surface 951 are shown to clearly illustrate the arrangement of the corresponding components. 10. Design

[0197] See Fig. 24, which shows a perspective view of an electronic device according to the 10th embodiment of the present disclosure.

[0198] An electronic device 100 provided in this embodiment can be an unmanned aerial vehicle. The electronic device 100 comprises a side camera module 100a and a front camera module 100b. The side camera module 100a and the front camera module 100b each comprise one of the camera modules 1-9 of the present disclosure in order to ensure reliable optical quality and environmental stability of the photography for the electronic device 100. 11. Design

[0199] See Fig. 25 and Fig. 26. Fig. Figure 25 is a perspective view of an electronic device according to the 11th embodiment of the present disclosure, and Fig. Figure 26 is another perspective view of the electronic device in Fig. 25.

[0200] In this embodiment, the electronic device 200 is a smartphone comprising a plurality of camera modules, a flash module 201, a focus assist module 202, an image signal processor 203, a display module (user interface) 204 and an image software processor (not shown).

[0201] These camera modules comprise an ultra-wide-angle camera module 200a, a high-pixel camera module 200b, a telephoto camera module 200c, and a telephoto camera module 200d. Furthermore, camera module 200b, for example, comprises one of the camera modules 1-9 described in the present disclosure, although the present disclosure is not limited to them. At least one of the camera modules 200a, 200c, and 200d may comprise one of the camera modules 1-9 of the present disclosure.

[0202] The image captured by the ultra-wide-angle camera module 200a is characterized by several depicted objects. Fig. Figure 27 is a representation of an image taken by the ultra-wide-angle camera module 200a.

[0203] The image captured by the 200b high-pixel camera module is characterized by high resolution and low distortion, and the 200b high-pixel camera module can capture part of the image in Fig. Record 27. Fig. Figure 28 is a representation of an image taken by the high-pixel camera module 200b.

[0204] The image captured by the 200c telephoto camera module or the 200d telephoto camera module is characterized by high optical magnification, and the 200c or 200d telephoto camera module can capture part of the image in Fig. Record 28. Fig. Figure 29 is a representation of an image taken by the Tele Camera Module 200c or the Tele Camera Module 200d.

[0205] When a user takes pictures of an object, the light rays are focused in the ultra-wide-angle camera module 200a, the high-resolution camera module 200b, the telephoto camera module 200c, or the telephoto camera module 200d to create an image, and the flash module 201 is activated for additional illumination. The focus assist module 202 detects the object's distance to enable fast autofocus. The image signal processor 203 is designed to optimize the captured image to improve image quality and provide a zoom function. The light beam emitted by the focus assist module 202 can be either conventional infrared light or laser light.The display module 204 can include a touchscreen, allowing the user to interact with it to adjust the viewing angle and switch between different camera modules. The image software processor has several functions for capturing images and performing image processing. Alternatively, the user can capture images using a physical button. The image processed by the image software processor can be displayed on the display module 204. 12. Design

[0206] See Fig. 30, which is a perspective view of an electronic device according to the 12th embodiment of the present disclosure.

[0207] In this embodiment, the electronic device 300 is a smartphone comprising a camera module 300a, a camera module 300b, a camera module 300c, a camera module 300d, a camera module 300e, a camera module 300f, a camera module 300g, a camera module 300h, a camera module 300i, a flash module 301, an image signal processor, a display module, and an image software processor (not shown). The camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i are arranged on the same side of the electronic device 300, while the display module is arranged on the opposite side of the electronic device 300. Furthermore, the camera module 300e includes, for example, one of the camera modules 1-9 described in the present disclosure, although the present disclosure is not limited to them.At least one of the camera modules 300a, 300b, 300c, 300d, 300f, 300g, 300h and 300i may comprise one of the camera modules 1-9 of the present disclosure.

[0208] The camera module 300a is a telephoto camera module, the camera module 300b is a telephoto camera module, the camera module 300c is a telephoto camera module, the camera module 300d is a telephoto camera module, the camera module 300e is a wide-angle camera module, the camera module 300f is a wide-angle camera module, the camera module 300g is an ultra-wide-angle camera module, the camera module 300h is a ToF camera module (ToF for Time of Flight) and the camera module 300i is an ultra-wide-angle camera module. In this embodiment, the camera modules 300i, 300a, 300b, 300c, 300d, 300e, 300f, and 300g have different fields of view, allowing the electronic device to have 300 different magnification ratios to meet the requirements of the optical zoom function. Furthermore, the camera modules 300a and 300b are telephoto camera modules with a light deflection configuration.Furthermore, the camera module 300h can determine depth information of the imaged object. In this embodiment, the electronic device 300 comprises several camera modules 300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, and 300i, but the present disclosure is not limited to the number and arrangement of the camera modules. When a user takes pictures of an object, the light rays are focused in camera module 300a, camera module 300b, camera module 300c, camera module 300d, camera module 300e, camera module 300f, camera module 300g, camera module 300h, or camera module 300i to produce one or more images, and the flash module 301 is activated to provide additional light. Furthermore, the subsequent processes are carried out in a similar manner to those in the embodiments mentioned above, so the details in this regard are not specified again. 13. Design

[0209] See Fig. 31 to Fig. 33. Fig. Figure 31 is a perspective view of an electronic device according to the 13th embodiment of the present disclosure, Fig. Figure 32 is a side view of the electronic device in Fig. 31 and Fig. 33 is a top view of the electronic device in Fig. 31.

[0210] In this embodiment, the electronic device 400 is an automobile. The electronic device 400 comprises a plurality of automotive camera modules 400a, and the camera modules 400a each comprise camera modules 1-9 of the present disclosure. The camera modules 400a can, for example, serve as panoramic car cameras, dashboard cameras, and vehicle reversing cameras.

[0211] As in Fig. As shown in Figure 31, the camera modules 400a, for example, are arranged around the vehicle to capture peripheral images of the vehicle, which is advantageous for capturing external traffic information to achieve an autopilot function. Furthermore, the image software processor can stitch the peripheral images together to form a panoramic image, allowing the driver to check all corners around the vehicle, which is beneficial for parking and driving.

[0212] As in Fig. As shown in Figure 32, the 400a camera modules are, for example, arranged on the lower part of the side mirrors. The maximum field of view of the 400a camera modules can be 40 to 90 degrees to capture images in areas on the left and right lanes.

[0213] As in Fig.As shown in Figure 33, the camera modules 400a can, for example, also be arranged on the lower part of the side mirrors and inside the front and rear windscreens to provide the driver with external information and also to offer more viewing angles in order to reduce blind spots and thereby improve driving safety.

[0214] The unmanned aerial vehicle, smartphones, panoramic car cameras, dashboard cameras, and vehicle reversing cameras in the embodiments serve only as examples to illustrate the camera module of the present disclosure installed in an electronic device, and the present disclosure is not limited to such devices. The camera module can optionally be applied to optical systems with moving focus. Furthermore, the camera module is characterized by good aberration correction capabilities and high image quality and can be used for 3D imaging (three-dimensional imaging) in products such as digital cameras, mobile devices, digital tablets, smart TVs, network surveillance devices, multi-camera devices, image recognition systems, motion sensor input devices, portable devices, and other electronic imaging devices.

[0215] The foregoing description has been provided for illustrative purposes with reference to specific embodiments. It should be noted that the present disclosure shows different data for the various embodiments; however, the data for the different embodiments were obtained experimentally. The embodiments were selected and described to best illustrate the principles of the disclosure and their practical applications, so that other skilled persons may make the best possible use of the disclosure and the various embodiments with different modifications suitable for their respective intended uses. The embodiments shown above and the accompanying drawings are exemplary and are neither intended to be exhaustive nor to limit the scope of the present disclosure to the forms exactly disclosed. In view of the above teachings, many modifications and variations are possible.

Claims

[1] Imaging lens (10) comprising the following: at least one lens element (11) with an optical axis (111); a tube (12) in which the at least one lens element (11) is accommodated; an arm (13) which is arranged on one side of the tube (12) away from the optical axis (111), wherein the arm (13) extends in a direction away from the optical axis (111); a holder (14) with a first contact surface (141) that overlaps and is in contact with the arm (13) in a direction parallel to the optical axis (111); and a holder (15) attached to the holder (14), wherein the holder (15) has a second contact surface (151) which overlaps and is in contact with the arm (13) in a direction parallel to the optical axis (111), and wherein the second contact surface (151) is arranged on a side opposite the first contact surface (141); wherein the arm (13) is arranged between the holder (14) and the bracket (15); wherein the holder (14) and the bracket (15) are made of different materials; wherein the first contact surface (141) and the second contact surface (151) surround the optical axis (111) and do not overlap in a direction parallel to the optical axis (111); where a coefficient of thermal expansion of the holder (14) α-holder is, a coefficient of thermal expansion of the holder (15) α-holder is, and the following condition is met: α-holder<α-holder; wherein a distance between the optical axis (111) and a side of the first contact surface (141) close to the second contact surface (151) D-1 is to the center, a distance between the optical axis (111) and a side of the second contact surface (151) close to the first contact surface (141) D-2 is to the center and the following condition is met: 0.05mm≤|D-1tocenter−D-2tocenter|≤1.8mm. [2] Imaging lens (10) according to claim 1, wherein the distance between the optical axis (111) and the side of the first contact surface (141) that is close to the second contact surface (151) is D-1 to the center, the distance between the optical axis (111) and the side of the second contact surface (151) that is close to the first contact surface (141) is D-2 to the center and the following condition is met: 0.01≤|D-1tocenter−D-2tocenter| / (D-1tocenter+D-2tocenter)≤0.

145. [3] Imaging lens (10) according to claim 1, wherein a coefficient of thermal expansion of the holder (14) at 25 °C is α-holder25, a coefficient of thermal expansion of the holder (14) at 50 °C is α-holder50 and the following condition is met: 1.01≤α-holder50 / α-holder25≤3.

63. [4] Imaging lens (10) according to claim 1, wherein the coefficient of thermal expansion of the holder (14) is α-holder, the coefficient of thermal expansion of the holder (15) is α-holder and the following condition is met: 30 ppm / °C < α-holder − α-holder < 240 ppm / °C. [5] Imaging lens (10) according to claim 1, wherein the coefficient of thermal expansion of the holder (15) is α-holder, a coefficient of thermal expansion of the arm (13) is α-arm and the following condition is met: α-bracket ≤ α-arm. [6] Imaging lens (10) according to claim 1, wherein the coefficient of thermal expansion of the mount (15) is α-mount, a coefficient of thermal expansion of the arm (13) is α-arm, a coefficient of thermal expansion of the tube (12) is α-tube, the coefficient of thermal expansion of the holder (14) is α-holder and the following condition is met: α-holder<α-arm≤α-tube<α-holder [7] Imaging lens (10) according to claim 1, wherein a thickness of the arm (13) parallel to the optical axis (111) between the first contact surface (141) and the second contact surface (151) T-arm is satisfied and the following condition is met: 0.15 mm≤T-arm≤1.5 mm. [8] Imaging lens (40) according to claim 1, wherein the arm (43) has a bending surface (43a) which is arranged closer to the optical axis (411) than the first contact surface (441) and the second contact surface (451); wherein a minimum thickness of the arm (43) at the bending surface (43a) along a direction parallel to the optical axis (411) is T-bend, a thickness of the arm (43) parallel to the optical axis (411) between the first contact surface (441) and the second contact surface (451) is T-arm and the following condition is met: 0.333≤T-bend / T-arm≤0.

885. [9] Imaging lens (10) according to claim 1, wherein a thickness of the arm (13) parallel to the optical axis (111) between the first contact surface (141) and the second contact surface (151) is T-arm, a thickness of the tube (12) along a direction parallel to the optical axis (111) is T-tube and the following condition is met: 0.035≤T-Arm / T-Tube≤0.

18. [10] Imaging lens (10) according to claim 1, wherein the holder (14) further comprises a first recessed surface (142) arranged adjacent to the first contact surface (141) and spaced apart from the arm (13); wherein a distance parallel to the optical axis (111) between the first recessed surface (142) and the arm (13) is G-holder and the following condition is met: 0.01 mm≤G-holder≤0.4 mm. [11] Imaging lens (50) according to claim 10, which further comprises an insertion element (57) that is arranged between the first recess surface (542) and the arm (53) and is in contact with the first recess surface (542) and the arm (53). [12] Imaging lens (20) according to claim 1, wherein the holder (25) further comprises a second recessed surface (252) arranged adjacent to the second contact surface (251) and spaced apart from the arm (23); wherein a distance parallel to the optical axis (211) between the second recessed surface (252) and the arm (23) is G-holder and the following condition is met: 0.01mm≤G mount≤0.4mm [13] Imaging lens (10) according to claim 1, wherein the holder (15) further comprises a fastening section (15a) which is attached to the holder (14); wherein a thickness of the arm (13) parallel to the optical axis (111) between the first contact surface (141) and the second contact surface (151) is T-arm, a length parallel to the optical axis (111) between the second contact surface (151) and the fastening section (15a) is L-2 for fastening, and the following condition is met: 0.042≤T-arm / L-2for mounting≤0.

775. [14] Imaging lens (10) according to claim 1, wherein the holder (14) has an inner surface (14a) facing the optical axis (111), the inner surface (14a) and the tube (12) forming an air gap (AG) between them, and the air gap (AG) overlapping the at least one lens element (11) along a direction perpendicular to the optical axis (111). [15] Imaging lens (10) according to claim 1, wherein the arm (13) and the tube (12) are formed in one piece. [16] Imaging lens (10) according to claim 1, wherein a distance between the arm (13) and an object end of the tube (12) is smaller than a distance between the arm (13) and an imaging end of the tube (12). [17] Imaging lens (20) according to claim 1, further comprising a connector (26) formed on the arm (23), wherein the connector (26) surrounds the optical axis (211) and forms a light-transmitting hole (LH) which is arranged at a position where an aperture of the imaging lens (20) is arranged. [18] Imaging lens (10) according to claim 1, wherein a length of the second contact surface (151) along a plane parallel to the optical axis (111) is L-holder, a length of the first contact surface (141) along a plane parallel to the optical axis (111) is L-holder and the following condition is met: 0.2 < L-holder / L-holder < 5. [19] Imaging lens (10) according to claim 1, wherein the at least one lens element (11) comprises a plastic lens element and a glass lens element. [20] Camera module (1), comprising: the imaging lens (10) according to claim 1; and an image acquisition assembly (1a) comprising an image sensor (IS) arranged on an image side of the imaging lens (10); wherein the holder (14) of the imaging lens (10) is attached to the image acquisition assembly (1a). [21] Electronic device (100) comprising: the camera module (1) according to claim 20. [22] Camera module (1) comprising the following: a lens assembly comprising a plurality of lens elements (11) arranged along an optical axis (111); a tube (12) which carries the lens assembly; an arm (13) extending from the tube (12) in a direction away from the optical axis (111); an image sensor (IS) located on an image side of the lens assembly; a holder (14) on which the tube (12) is arranged such that the tube (12) corresponds to the image sensor (IS), wherein the holder (14) has a first contact surface (141) that surrounds the optical axis (111) and is in contact with the arm (13); and a holder (15) attached to the holder (14) to secure the tube (12) to the holder (14), the holder (15) having a second contact surface (151) surrounding the optical axis (111) and in contact with the arm (13) to keep the arm (13) in constant contact with the first contact surface (141); wherein the arm (13) is arranged between the holder (14) and the bracket (15); wherein one of the arm (13), the holder (14) and the bracket (15) is made of a material that differs from that of the other two of the arm (13), the holder (14) and the bracket (15); wherein the first contact surface (141) and the second contact surface (151) do not overlap in a direction parallel to the optical axis (111); wherein a distance between the optical axis (111) and a side of the first contact surface (141) is close to the second contact surface (151) D-1 to the center, a distance between the optical axis (111) and a side of the second contact surface (151) is close to the first contact surface (141) D-2 to the center and the following condition is satisfied: 0.05mm≤|D-1tocenter−D-2tocenter|≤1.8mm. [23] Camera module (1) according to claim 22, wherein the distance between the optical axis (111) and the side of the first contact surface (141) that is close to the second contact surface (151) is D-1tocenter, the distance between the optical axis (111) and the side of the second contact surface (151) that is close to the first contact surface (141) is D-2tocenter and the following condition is satisfied: 0.01 ≤ |D-1tocenter - D-2tocenter / (D-1tocenter + D-2tocenter) ≤ 0.

145. [24] Camera module (8) according to claim 22, wherein the holder (84) has an extension section (8407) configured to move the first contact surface (841) of the holder (84) along a direction parallel to the optical axis (811); wherein a coefficient of thermal expansion of the extension section (8407) is α-extension, a coefficient of thermal expansion of the holder (85) at 25 °C is α-holder25, and the following condition is met: 30 ppm / °C≤α-extension-α-holder25≤240 ppm / °C. [25] Camera module (8) according to claim 22, wherein the holder (84) has an extension section (8407) configured to move the first contact surface (841) of the holder (84) along a direction parallel to the optical axis (811), and wherein the extension section (8407) has a coefficient of thermal expansion that changes with temperature; wherein a coefficient of thermal expansion of the holder (84) at 25 °C is α-holder25, a coefficient of thermal expansion of the holder (84) at 50 °C is α-holder50, and the following condition is met: 1.01≤α-holder50 / α-holder25≤3.

63. [26] Camera module (1) according to claim 22, wherein a coefficient of thermal expansion of the tube (12) at 25 °C is α-tube25, a coefficient of thermal expansion of the holder (15) at 25 °C is α-holder25 and the following condition is met: α-holder25<α-tube25. [27] Camera module (1) according to claim 22, wherein the thickness of the arm (13) parallel to the optical axis (111) between the first contact surface (141) and the second contact surface (151) is T-arm and the following condition is met: 0.15 mm ≤ T-arm ≤ 1.5 mm. [28] Camera module (4) according to claim 22, wherein the arm (43) has a bending surface (43a) which is arranged closer to the optical axis (411) than the first contact surface (441) and the second contact surface (451); wherein a minimum thickness of the arm (43) at the bending surface (43a) along a direction parallel to the optical axis (411) is T-bend, a thickness of the arm (43) parallel to the optical axis (411) between the first contact surface (441) and the second contact surface (451) is T-arm and the following condition is met: 0.333≤T−Bend / T−Arm≤0.

885. [29] Camera module (8) according to claim 28, wherein the arm (83) further comprises a flat surface (83c) which is perpendicular to the optical axis (811) and is located closer to the optical axis (811) than the bending surface (83a), and wherein the thickness of the arm (83) at the flat surface (83c) along a direction parallel to the optical axis (811) is greater than the thickness of the arm (83) at the bending surface (83a) along a direction parallel to the optical axis (811). [30] Camera module (4) according to claim 22, wherein the arm (43) has a bending surface (43a) which is arranged closer to the optical axis (411) than the first contact surface (441) and the second contact surface (451), and wherein the thickness of the arm (43) gradually increases along a direction parallel to the optical axis (411) from a position where the bending surface (43a) is arranged to a position where the first contact surface (441) is arranged; wherein a minimum thickness of the arm (43) at the bending surface (43a) along a direction parallel to the optical axis (411) is T-bend and the following condition is met: 0.15 mm≤T−Bending≤1 mm. [31] Camera module (1) according to claim 22, wherein the holder (14) further comprises a first recessed surface (142) arranged adjacent to the first contact surface (141) and spaced apart from the arm (13); wherein a distance parallel to the optical axis (111) between the first recessed surface (142) and the arm (13) is G-holder and the following condition is met: 0.01 mm≤G holder≤0.4 mm. [32] Camera module (5) according to claim 31, further comprising an insertion element (57) arranged between the first recess surface (542) and the arm (53). [33] Camera module (1) according to claim 22, wherein the mount (15) further comprises a fastening section (15a) by which the mount (15) is connected to the holder (14); wherein a thickness of the arm (13) parallel to the optical axis (111) between the first contact surface (141) and the second contact surface (151) is T-arm, a length parallel to the optical axis (111) between the second contact surface (151) and the fastening section (15a) is L-2 for fastening, and the following condition is met: 0.042≤T−arm / L−2for mounting≤0.

775. [34] Camera module (6) according to claim 22, wherein the holder (64) further comprises a reinforcing element (6406) which overlaps with the first contact surface (641) along a direction parallel to the optical axis (611). [35] Camera module (8) according to claim 22, wherein the holder (84) comprises: a basis (840a); and a holder carrier (840b) which is arranged at the base (840a), wherein the holder carrier (840b) has the first contact surface (841) and a third contact surface (843) and the holder carrier (840b) is in contact with the base (840a) via the third contact surface (843); wherein the holder (85) has a fastening section (85a) by which the holder (85) is attached to the base (840a); wherein the third contact surface (843) is located closer to the arm (83) than the fastening section (85a). [36] Camera module (1) according to claim 22, wherein a length of the second contact surface (151) along a plane parallel to the optical axis (111) is L-holder, a length of the first contact surface (141) along a plane parallel to the optical axis (111) is L-holder and the following condition is met: 0.2 < L-holder / L-holder < 5. [37] Electronic device (100) comprising: the camera module (1) according to claim 22. [38] Camera module (8) comprising the following: a lens assembly comprising a plurality of lens elements (81) arranged along an optical axis (811); a tube (82) which carries the lens assembly; an arm (83) extending from the tube (82) in a direction away from the optical axis (811); an image sensor (IS) located on an image side of the lens assembly; a holder (84) on which the tube (82) is arranged such that the tube (82) corresponds to the image sensor (IS), the holder comprising the following: a basis (840a); and a holder carrier (840b) arranged at the base (840a), wherein the holder carrier (840b) has a first contact surface (841) that surrounds the optical axis (811) and is in contact with the arm (83), and wherein the holder carrier (840b) supports the tube (82) through the first contact surface (841); and a bracket (85) attached to the holder (84) to secure the tube (82) to the holder (84), the bracket (85) having a second contact surface (851) and a mounting section (85a), the second contact surface (851) surrounding the optical axis (811) and being in contact with the arm (83), and wherein the holder (85) is attached to the base (840a) by the fastening section (85a); wherein the arm (83) is arranged between the holder (84) and the bracket (85); wherein one of the arm (83), the holder (84) and the bracket (85) is made of a material that differs from that of the other two of the arm (83), the holder (84) and the bracket (85); wherein the first contact surface (841) and the second contact surface (851) do not overlap in a direction parallel to the optical axis (811). [39] Camera module (8) according to claim 38, wherein a distance between the optical axis (811) and a side of the first contact surface (841) is close to the center of the second contact surface (851) D-1, a distance between the optical axis (811) and a side of the second contact surface (851) is close to the center of the first contact surface (841) D-2 and the following condition is met: 0.01≤|D−1tocenter−D−2tocenter| / (D−1tocenter+D−2tocenter)≤0.

145. [40] Camera module (8) according to claim 38, wherein the holder support (840b) has an extension section (8407); wherein a coefficient of thermal expansion of the extension section (8407) is α-extension, a coefficient of thermal expansion of the holder (85) at 25 °C is α-holder25 and the following condition is met: 30 ppm / °C≤α−extension−α−holder25≤240 ppm / °C. [41] Camera module (8) according to claim 38, wherein a coefficient of thermal expansion of the tube (82) at 25 °C is α-tube25, a coefficient of thermal expansion of the mount (85) at 25 °C is α-mount25 and the following condition is met: α−holder25<α−tube25. [42] Camera module (8) according to claim 38, wherein a thickness of the arm (83) parallel to the optical axis (811) between the first contact surface (841) and the second contact surface (851) is T-arm and the following condition is met: 0.15 mm≤T−Arm≤1.5 mm. [43] Camera module (8) according to claim 38, wherein the arm (83) has a bending surface (83a) which is arranged closer to the optical axis (811) than the first contact surface (841) and the second contact surface (851); wherein a minimum thickness of the arm (83) at the bending surface (83a) along a direction parallel to the optical axis (811) is T-bend, a thickness of the arm (83) parallel to the optical axis (811) between the first contact surface (841) and the second contact surface (851) is T-arm and the following condition is met: 0.333≤T−Bend / T−Arm≤0.

885. [44] Camera module (8) according to claim 43, wherein the arm (83) further comprises a flat surface (83c) which is perpendicular to the optical axis (811) and is located closer to the optical axis (811) than the bending surface (83a), and wherein the thickness of the arm (83) at the flat surface (83c) along a direction parallel to the optical axis (811) is greater than the thickness of the arm (83) at the bending surface (83a) along a direction parallel to the optical axis (811). [45] Camera module (8) according to claim 38, wherein the arm (83) has a bending surface (83a) which is arranged closer to the optical axis (811) than the first contact surface (841) and the second contact surface (851), and wherein the thickness of the arm (83) gradually increases along a direction parallel to the optical axis (811) from a position where the bending surface (83a) is arranged to a position where the first contact surface (841) is arranged; wherein a minimum thickness of the arm (83) at the bending surface (83a) along a direction parallel to the optical axis (811) is T-bend and the following condition is met: 0.15 mm≤T−Bending≤1 mm. [46] Camera module (8) according to claim 38, wherein the holder (84) further comprises a first recess surface (842) arranged adjacent to the first contact surface (841) and spaced apart from the arm (83); wherein a distance parallel to the optical axis (811) between the first recess surface (842) and the arm (83) is G-holder and the following condition is met: 0.01 mm≤G holder≤0.4 mm. [47] Camera module (5) according to claim 46, which further comprises an insertion element (57) arranged between the first recess surface (542) and the arm (53). [48] ​​Camera module (8) according to claim 38, wherein a thickness of the arm (83) parallel to the optical axis (811) between the first contact surface (841) and the second contact surface (851) is T-arm, a length parallel to the optical axis (811) between the second contact surface (851) and the mounting section (85a) is L-2 for mounting, and the following condition is met: 0.042 ≤ T-arm / L-2 for mounting ≤ 0.

775. [49] Camera module (8) according to claim 38, wherein the holder carrier (840b) further comprises a reinforcing element (8406) which overlaps the first contact surface (841) along a direction parallel to the optical axis (811). [50] Camera module (8) according to claim 38, wherein a length of the second contact surface (851) along a plane parallel to the optical axis (811) is L-holder, a length of the first contact surface (841) along a plane parallel to the optical axis (811) is L-holder and the following condition is met: 0.2 < L-holder / L-holder < 5. [51] Electronic device (100) comprising: the camera module (8) according to claim 38. [52] Camera module (8) comprising the following: a plurality of lens elements (81) arranged along an optical axis (811); a tube (82) with a cylindrical wall (821) surrounding the plurality of lens elements (81); an arm (83) extending from the cylindrical wall (821) of the tube (82) along a direction away from the optical axis (811), the arm (83) having an upper arm surface (831) facing the object side, and a lower arm surface (832) facing towards the image side; an image sensor (IS) arranged on an image side of the tube (82); a holder (84) on which the tube (82) is arranged, the holder (84) comprising: a base (840a) with a bottom section (8401) and a surrounding wall (8402), wherein the bottom section (8401) has a lower surface (8401a) facing the arm (83), the surrounding wall (8402) extends from the lower surface (8401a) of the bottom section (8401) towards the arm (83), and the surrounding wall (8402) has a surrounding upper surface (8402a) facing the arm (83) and a surrounding inner surface (8402b) facing the tube (82); and a support bracket (840b) connected to the base (840a), wherein the support bracket (840b) has the following: a reinforcement element (8406) comprising a first plant section (8406a), a connecting section (8406b) and a second plant section (8406c), wherein the first attachment section (8406a) rests against the surrounding upper surface (8402a), the connecting section (8406b) extends from the first attachment section (8406a) in a direction away from the arm (83), the second stop section (8406c) is connected to the connecting section (8406b), and the second stop section (8406c) is arranged further away from the arm (83) than the first stop section (8406a); and an extension section (8407) with a first end (8407a) connected to the second installation section (8406c) and a second end (8407b), extending from the first end (8407a) towards the arm (83), the second end (8407b) being in contact with the lower arm surface (832) and forming a first contact surface (841); and a holder (85) which is attached to the holder (84), wherein the holder (85) rests against the upper arm surface (831) and forms a second contact surface (851); wherein a length of the surrounding inner surface (8402b) along a direction parallel to the optical axis (811) is L-side surface spoilage, a length of the lower surface (8401a) along a direction parallel to the optical axis (811) is L-lower side surface and the following condition is satisfied: L−side surface spoil>L−lower side surface. [53] Camera module (8) according to claim 52, wherein a distance between the optical axis (811) and a side of the first contact surface (841) is close to the center of the second contact surface (851) D-1, a distance between the optical axis (811) and a side of the second contact surface (851) is close to the center of the first contact surface (841) D-2 and the following condition is met: 0.05mm≤|D−1tocenter−D−2tocenter|≤1.8mm. [54] Camera module (8) according to claim 52, wherein the retaining carrier (840b) has a third contact surface (843) through which the retaining carrier (840b) is in contact with the base (840a), the first end (8407a) of the extension section (8407) is in contact with the reinforcement element (8406) and forms a fourth contact surface (844), and the fourth contact surface (844) is arranged closer to the arm (83) than the third contact surface (843). [55] Camera module (8) according to claim 52, wherein the reinforcement element (8406) is arranged between the extension section (8407) and the surrounding wall (8402). [56] Camera module (8) according to claim 52, wherein the holder (84) has a first recess surface (842) which is directed towards the arm (83), and wherein the first recess surface (842) is arranged adjacent to the first contact surface (841) and spaced apart from the arm (83). [57] Camera module (5) according to claim 56, which further comprises an insertion element (57) arranged on the first recess surface (542). [58] Electronic device (100) comprising: the camera module (8) according to claim 52.

Images