Lens assembly and imaging module

Abstract

The invention discloses a lens assembly and an imaging module, and relates to the technical field of imaging. The lens assembly comprises a first lens and at least one second lens which are sequentially arranged in the light path direction, and the first lens and the second lens are both arranged in the lens base; the shutter is arranged in the lens base and is positioned on one side, close to the second lens, of the first lens; the heating piece is arranged on the inner wall of the lens base, and the heating piece is attached to the side, close to the second lens, of the first lens and used for heating the first lens. The lens assembly, the heating element, the shutter and the lens assembly are all arranged in the lens base, so that the assembly of the heating element can be simplified, the assembly structure of the lens assembly is simplified, and the miniaturization design of the imaging module is facilitated.

Description

Technical Field

[0001] This invention relates to the field of imaging technology, and more specifically, to a lens assembly. Furthermore, this invention also relates to an imaging module comprising the aforementioned lens assembly. Background Technology

[0002] Visible light cameras have unavoidable disadvantages in scenarios such as glare, insufficient dynamic range leading to "blinding" effects, and dim lighting. Infrared cameras, based on the principle of thermal imaging, can overcome these disadvantages and are thus widely used.

[0003] In related technologies, the lens section of the module is equipped with a heating element to achieve a defogging effect, and a thermally conductive silicon sheet is usually provided in conjunction with the heating element. In order to ensure the seal between the thermally conductive silicon sheet and the lens, additional components such as pressure rings and sealing rings are required, which makes the lens section structure complex and compact. At the same time, the shutter assembly and circuit board assembly are located in the base of the module. The above structural layout makes the assembly process of the entire module very complex.

[0004] In conclusion, simplifying the module assembly process is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a lens assembly with a simple lens assembly structure, where the shutter does not occupy the module base space, thereby simplifying the module assembly process. Another object of the present invention is to provide an imaging module including the above-described lens assembly.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A lens assembly, comprising:

[0008] Mirror base;

[0009] The lens assembly includes a first lens and at least one second lens arranged sequentially along the optical path direction, wherein both the first lens and the second lens are disposed within the lens mount;

[0010] A shutter is located within the lens mount, on the side of the first lens closer to the second lens.

[0011] A heating element is connected to the inner wall of the lens mount and is disposed in close contact with the side of the first lens near the second lens, for heating the first lens.

[0012] Preferably, the heating element includes a heating section, which is connected to a mounting groove on the inner wall of the lens mount on the side close to the second lens, and is fitted to the first lens on the side away from the second lens.

[0013] Preferably, the heating element includes a first communication part and a heating part, the heating part being fitted to the first lens, one end of the first communication part being connected to the heating part, and the other end of the first communication part extending out of the lens mount and used to connect to the main control circuit board assembly.

[0014] Preferably, the first communication unit includes a first bent portion, a second bent portion, and a third bent portion connected in sequence. The first bent portion is connected to the heating unit. The second bent portion includes a first portion bent relative to the first bent portion and conforming to the inner wall of the lens mount, and a second portion bent relative to the first portion and located between the side of the shutter and the inner wall of the lens mount. The third bent portion extends out of the lens mount and is connected to the main control circuit board assembly.

[0015] Preferably, the shutter includes a body, the body is provided with at least one clearance portion and a fitting portion connected to the clearance portion, the fitting portion is fitted to the inner wall of the lens mount, and a clearance gap is provided between the clearance portion and the inner wall of the lens mount, the clearance gap being used for the passage of the first communication unit;

[0016] A fixing part is provided between the edge of the avoidance part and the edge of the window of the main body, and the fixing part is connected to the mirror base.

[0017] Preferably, the shutter includes a body and a second communication unit connected to the body, the second communication unit extending away from the body and used to connect to the main control circuit board assembly.

[0018] Preferably, the shutter is located between the first lens and the second lens adjacent to the first lens;

[0019] Alternatively, the shutter may be located between two adjacent second lenses.

[0020] Preferably, it also includes a front pressure ring, which is connected to the lens mount, and the first lens and the front pressure ring are in a sealed connection.

[0021] The present invention also provides an imaging module, including a lens assembly as described in any of the above claims and a module base, wherein the lens assembly is connected to the module base.

[0022] Preferably, the inner edge of the module base has an imaging circuit board assembly and a main control circuit board assembly, and the imaging circuit board assembly, the heating element and the shutter are all signal connected to the main control circuit board assembly.

[0023] The lens assembly provided by this invention includes a lens mount, a lens assembly, a shutter, and a heating element. The lens assembly includes a first lens and at least one second lens arranged along the optical path direction, both of which are located within the lens mount. The shutter is located within the lens mount and on the side of the first lens closer to the second lens, used to block or allow incident light to pass through. The heating element is connected to the inner wall of the lens mount and is fitted to the first lens, capable of heating the first lens. This prevents water vapor and frost from forming on the lens and regulates the lens temperature to maintain thermal stability, thereby ensuring imaging performance. The lens assembly, heating element, and shutter are all integrated within the lens mount. By fitting the heating element to the side of the first lens closer to the second lens, the shutter can be arranged within the lens mount without occupying space in the module base, simplifying the assembly of the heating element and the lens assembly, thus simplifying the module structure and the module assembly structure.

[0024] The beneficial effects of the present invention are as follows: by connecting the heating element to the inner wall of the lens mount and fitting it to the side of the first lens that is close to the second lens, the heating requirement of the first lens is met; by simplifying the assembly structure of the heating element, the shutter can be arranged inside the lens mount, simplifying the module assembly structure and facilitating the miniaturization design of the module. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the lens assembly provided by the present invention;

[0027] Figure 2 for Figure 1 The right view;

[0028] Figure 3 for Figure 2 Sectional view along axis AA;

[0029] Figure 4 An exploded view of the lens assembly provided by this invention;

[0030] Figure 5 This is a schematic diagram of the structure of the mirror mount provided by the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the heating element provided by the present invention;

[0032] Figure 7This is a schematic diagram of the shutter structure provided by the present invention;

[0033] Figure 8 This is a schematic diagram of the imaging module provided by the present invention;

[0034] Figure 9 This is a bottom view of the imaging module provided by the present invention;

[0035] Figure 10 An exploded view of the imaging module provided by this invention;

[0036] Figure 11 This is a half-sectional view of the imaging module provided by the present invention.

[0037] Figures 1-11 In the accompanying drawings, the reference numerals include:

[0038] 1-Lens mount; 2-Lens assembly; 3-Heating element; 4-Shutter; 5-Protective base; 6-Front pressure ring; 7-Mounting component; 8-Clearing clearance;

[0039] 11-Mounting slot; 21-First lens; 22-Second lens; 31-Heating part; 32-Hollowed-out area; 33-First communication part; 41-Main body; 42-Second communication part; 43-Fixing part; 44-Avoidance part; 45-Fitting part; 46-Window; 331-First bending part; 332-Second bending part; 333-Third bending part; 3321-First part; 3322-Second part;

[0040] 01-Lens assembly; 02-Adhesive component; 03-Module base; 04-Imaging circuit board assembly; 05-First screw; 06-First heat sink; 07-Second heat sink; 08-Main control circuit board assembly; 09-Rear cover; 010-Sealing component; 011-Second screw. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] The core of this invention is to provide a lens assembly 01 in which the heating element 3 and shutter 4 are integrated into the lens mount 1. By simplifying the form of the heating element 3, the shutter 4 can be placed inside the lens assembly 01 without occupying the space of the module base 03, thus simplifying the module assembly process and facilitating miniaturization design. Another core aspect of this invention is to provide an imaging module including the aforementioned lens assembly 01.

[0043] The lens assembly 01 provided by this invention includes a lens mount 1, a lens assembly 2, a shutter 4, and a heating element 3. These three components are all housed within the lens mount 1, forming a three-in-one lens structure. A protective base 5 is provided on the outer side of the lens mount 1. Please refer to [reference needed]. Figure 1 , Figure 2 , Figure 3 , Figure 4 .

[0044] Lens assembly 2 includes a first lens 21 and at least one second lens 22 arranged sequentially along the optical path direction. The optical path direction here specifically refers to the direction in which incident light enters the lens assembly 01. Figure 3 The direction indicated by the middle arrow is as follows. Specifically, the first lens 21 is responsible for mid-wave transmission and front-end protection, while at least one second lens 22 is responsible for long-wave extension and aberration correction, together achieving clear imaging across a wide band and adapting to more infrared detection scenarios. Specific detection scenarios include mid-wave detection during the day and long-wave imaging at night.

[0045] The first lens 21 is made of silicon and coated with a DLC film to ensure its wear resistance, corrosion resistance, and service life. The second lens 22 is made of sulfur.

[0046] The shutter 4 is located inside the lens mount 1 and is situated on the side of the first lens 21 closer to the second lens 22. Specifically, the shutter 4 achieves the passage or blocking of incident light through the opening and closing state of the blades. When incident light passes through, the lens can form an image, and when incident light is blocked, it corresponds to a standby state or a transport state, etc.

[0047] The heating element 3 is connected to the inner wall of the lens mount 1, and is positioned against the side of the first lens 21 closest to the second lens 22, specifically the inner side of the first lens 21. The edge of the heating element 3 is fitted against the first lens 21. A hollow area 32 is provided in the center of the heating element 3, which corresponds to the window 46 of the shutter 4, preventing the heating element 3 from obstructing the light path. Please refer to [reference needed]. Figure 6 , Figure 7 .

[0048] The heating element 3 is specifically connected to the inner wall of the lens base 1 and can be fixed by snap-fit. For example, one of the inner wall of the lens base 1 and the outer edge of the heating element 3 is provided with a protrusion, and the other is provided with a groove. The fixing is achieved by the interlocking structure of the protrusion and the groove. Alternatively, if the inner wall of the lens base 1 is provided with a groove structure, the outer edge of the heating element 3 is directly placed in the groove structure for fixing. By fixing the heating element 3 relative to the inner wall of the lens base 1, the heating element 3 and the first lens 21 are reliably attached, so as to ensure the reliable heating effect of the heating element 3 on the first lens 21.

[0049] The heating element 3 is directly connected to the inner wall of the lens mount 1 without the need for other auxiliary components, simplifying the assembly structure of the heating element 3. This provides additional space within the lens mount 1 for the shutter 4. The integrated structure of the shutter 4, heating element 3, and lens assembly 2 fully utilizes the space within the lens mount 1 to arrange each structure, simplifying the assembly structure of the lens assembly 01 while facilitating the platformization and miniaturization of the imaging module. Platformization refers to integrating the module's design, production, and application into a system platform to reduce development costs and meet diverse needs. Miniaturization refers to the fact that the shutter 4's placement within the lens assembly 01 eliminates the need for it to occupy space in the module base 03, reducing the size of the module base 03. The heating element 3 can be installed within the lens mount 1 without other auxiliary components, reducing the space occupied by auxiliary components, thus enabling a miniaturized design for the entire module.

[0050] Based on the above embodiments, please refer to Figure 4 , Figure 5 , Figure 6 The heating element 3 includes a heating section 31. The side of the heating section 31 closest to the second lens 22 is connected to a mounting groove 11 provided on the inner wall of the lens mount 1. The side of the heating section 31 furthest from the second lens 22 is fitted against the first lens 21. Here, "one side" and "the other side" of the heating section 31 refer to the two sides along its thickness direction. The thickness direction is parallel to... Figure 3 The middle arrow indicates the direction.

[0051] The heating element 3 is fixed relative to the mirror base 1 by fitting the edge of the heating part 31 with the mounting groove 11. The width and depth of the mounting groove 11 are determined according to the actual structural dimensions of the heating element 3 and are not limited.

[0052] In one specific embodiment, a mounting groove 11 is provided on the inner wall of the mirror base 1. The mounting groove 11 is an arc-shaped groove with an opening. The opening allows the communication element of the heating element 3 to extend out of the mirror base 1. The arc-shaped groove directly forms a large-area contact with the lower end face of the heating part 31 to ensure reliable fixation of the heating element 3 relative to the mirror base 1. Here, the arc-shaped groove corresponds to the arc-shaped structure of the heating part 31. If the heating part 31 has other shapes, the structure of the arc-shaped groove can be changed, and there is no limitation.

[0053] In another specific embodiment, the inner wall of the mirror base 1 is provided with at least two mounting grooves 11 along the circumferential direction, and the interval between the two mounting grooves 11 is sufficient for the communication element of the heating element 3 to extend out. The at least two spaced mounting grooves 11 are respectively supported at different positions on the lower end face of the heating part 31, which can also provide support for the heating part 31 so as to reliably fix the heating element 3 to the mirror base 1.

[0054] In the two specific embodiments described above, the communication element of the heating element 3 is... Figure 6 The first communication unit 33 is shown in the diagram.

[0055] In actual installation, the heating part 31 of the heating element 3 can be installed into the mounting groove 11 first, and then the first lens 21 can be installed so that the first lens 21 and the heating part 31 are fitted together.

[0056] Based on any of the above embodiments, please refer to Figure 6 , Figure 10 The heating element 3 includes a heating part 31 and a first communication part 33. The heating part 31 is attached to the first lens 21. One end of the first communication part 33 is connected to the heating part 31, and the other end of the first communication part 33 extends out of the lens base 1 and is used to connect to the main control circuit board assembly 08.

[0057] In one specific implementation, the main control circuit board assembly 08 is an ASIC PCBA, where ASIC (Application-Specific Integrated Circuit) refers to an application-specific integrated circuit, and PCBA (Printed Circuit Board Assembly) refers to a printed circuit board assembly.

[0058] The first communication unit 33 is connected to the main control circuit board assembly 08 to achieve closed-loop temperature control. Specifically, the main control circuit board assembly can acquire the temperature information of the first lens 21 and adjust the heating strategy according to this temperature information to stabilize the heating temperature of the first lens 21 within the set range, preventing performance degradation caused by condensation, fogging, frosting, or low temperature, while also avoiding energy waste caused by overheating and ensuring imaging effect.

[0059] In this embodiment, the structural form of the first communication unit 33 is not limited, and is specifically determined according to its actual positional relationship with the main control circuit board assembly 08.

[0060] Based on any of the above embodiments, please refer to Figure 6 In a specific example, the first communication unit 33 includes a first bending portion 331, a second bending portion 332, and a third bending portion 333 connected in sequence. The first bending portion 331 is connected to the heating unit 31. The second bending portion 332 includes a first portion 3321 that is bent relative to the first bending portion 331 and fits against the inner wall of the lens mount 1, and a second portion 3322 that is bent relative to the first portion 3321 and located between the side of the shutter 4 and the inner wall of the lens mount 1. The third bending portion 333 extends out of the lens mount 1 and is connected to the main control circuit board assembly 08.

[0061] like Figure 3 , Figure 6The first bending portion 331 extends from the heating portion 31 in a vertical direction close to the shutter 4. The first part 3321 of the second bending portion 332 is located between the top of the shutter 4 and the inner wall of the lens mount 1. The second part 3322 passes through the gap between the side of the shutter 4 and the inner wall of the lens mount 1. The third bending portion 333 extends away from the shutter 4 and protrudes from the lens mount 1. The third bending portion 333 is signal-connected to the main control circuit board assembly 08 to realize communication.

[0062] Among them, such as Figure 6 The first part 3321 is bent relative to the second part 3322, and the specific bending angle between them is not limited. The inner wall of the lens mount 1 corresponding to the second bent part 332 consists of a transverse inner wall that fits against the first part 3321 and a longitudinal inner wall that forms a gap with the side of the shutter 4 for the second part 3322 to pass through. The longitudinal section is as follows: Figure 3 The direction of the arrow in the image is indicated.

[0063] In this embodiment, the first bending portion 331 and the second bending portion 332 can be arranged in the space formed by the shutter 4 after it is installed in the lens mount 1, so that the internal structure of the lens mount 1 is compact and the space is maximized, and the lens assembly 01 can be miniaturized.

[0064] Based on any of the above embodiments, please refer to Figure 7 The shutter 4 includes a body 41, which is provided with at least one clearance part 44 and a fitting part 45 connected to the clearance part 44. The fitting part 45 is fitted to the inner wall of the lens mount 1. A clearance gap 8 is provided between the clearance part 44 and the inner wall of the lens mount 1. The clearance gap 8 is used for the passage of the first communication part 33.

[0065] like Figure 3 As shown, the fitting part 45 can be fitted to the inner wall of the lens mount 1 for positioning, while the clearance part 44 is provided with at least one clearance gap 8 that can be formed with the inner wall of the lens mount 1, providing space for the first communication part 33 to pass through. Thus, by designing the structure of the body 41, the shutter 4 can meet the basic requirements of blocking or allowing light to pass through, and the clearance part 44 at its edge position can meet the usage requirements of facilitating the installation of the heating element 3, making the installation of the heating element 3 simple and convenient.

[0066] In one implementation, such as Figure 7The main body 41 has two clearance portions 44 circumferentially. The clearance portions 44 are actually planar, while the fitting portion 45 is arc-shaped. Corresponding to the inner wall of the lens mount 1 being circular, the fitting portion 45 fits into the circular surface, while the clearance portions 44 can form a clearance gap 8 with the circular surface. Either clearance portion 44 can be used for the passage of the second part 3322 of the first communication unit 33, so that the second bending portion 332 can be reasonably arranged using the space inside the lens mount 1, making the lens assembly structure compact and conducive to module miniaturization and platformization.

[0067] In this embodiment, the body 41 should also include blades that can rotate to close or open the window 46 of the body 41, which will not be described in detail.

[0068] Based on any of the above embodiments, please refer to Figure 7 A fixing part 43 is provided between the edge of the clearance part 44 and the edge of the window 46 of the body 41, and the fixing part 43 is connected to the mirror base 1.

[0069] The fixing part 43 is specifically a column structure. Fasteners such as screws pass through the column structure and are connected to the lens mount 1 to ensure that the shutter 4 is reliably and securely installed relative to the lens mount 1.

[0070] In this embodiment, two fixing parts 43 may be provided on the main body 41 so that they can be fixedly installed from both sides of the shutter 4. Alternatively, more than two parts may be provided, depending on the actual situation, without excessive restrictions.

[0071] Based on any of the above embodiments, please refer to Figure 7 , Figure 10 The shutter 4 includes a body 41 and a second communication unit 42 connected to the body 41. The second communication unit 42 extends away from the body 41 and is used to connect to the main control circuit board assembly 08.

[0072] The second communication unit 42 is a component that connects the shutter 4 signal to the main control circuit board assembly 08. The main control circuit board assembly 08 can control the opening and closing state and opening and closing time of the shutter 4, and the current state of the shutter 4 can also be fed back to the main control circuit board assembly 08.

[0073] like Figure 3 , Figure 6 , Figure 7 As shown, the second communication unit 42 extends from the lower surface of the body 41 and is close to the first communication unit 33. The first communication unit 33 and the second communication unit 42 can extend downward from the same position area on the lower surface of the body 41 and connect to the main control circuit board assembly 08, so that the first communication unit 33 and the second communication unit 42 can be concentrated and form a communication connection with the main control circuit board assembly 08.

[0074] To ensure the integration of the first communication unit 33 and the second communication unit 42, they can be integrated into a single unit using the mounting component 7. Specifically, the mounting component 7 can be provided with two parallel mounting slots, one for the first communication unit 33 to pass through and the other for the second communication unit 42 to pass through and be installed, thereby improving the overall integrity and aesthetics.

[0075] Based on any of the above embodiments, the shutter 4 is located between the first lens 21 and the second lens 22 adjacent to the first lens 21;

[0076] Alternatively, shutter 4 may be located between two adjacent second lens elements 22.

[0077] In one specific embodiment, if a second lens 22 is provided, then the shutter 4 is located between the first lens 21 and the second lens 22.

[0078] In another specific embodiment, two second lenses 22 are provided, such as... Figure 3 As shown, shutter 4 is located between the two second lens elements 22. In this embodiment, both second lens elements 22 are convex lenses, or both second lens elements 22 are concave lenses, or one of the two second lens elements 22 is a concave lens and the other is a convex lens, depending on the actual usage requirements.

[0079] In another embodiment, three second lens elements 22 are provided, and the shutter 4 is located between two adjacent second lens elements 22, or between the first lens element 21 and the adjacent second lens element 22. In this embodiment, the three second lens elements 22 can be of various types, such as all being convex lenses, all being concave lenses, or a combination thereof.

[0080] In the above three implementation methods, there is a certain distance between the shutter 4 and the heating element 3 attached to the first lens 21. This distance can be determined after the optical distance between the first lens 21 and the shutter 4 is determined in the actual optical design.

[0081] Based on any of the above embodiments, please refer to Figure 3 The front pressure ring 6 is connected to the lens mount 1, and the first lens 21 is sealed to the front pressure ring 6.

[0082] like Figure 3 As shown, the front pressure ring 6 is located on top of the lens mount 1. The installation of the front pressure ring 6 and the lens mount 1 can be completed by radially set fixing pins or fixing bolts, or by threaded connection + adhesive application, to ensure reliable installation of the front pressure ring 6 and the lens mount 1.

[0083] A sealing ring is provided between the edge of the first lens 21 and the inner wall of the front pressure ring 6. The sealing ring prevents rainwater and impurities from entering the lens mount 1, ensuring reliable protection.

[0084] In addition to the lens assembly 01 described above, the present invention also provides an imaging module including the lens assembly 01 disclosed in the above embodiments, the imaging module further including a module base 03. The imaging module can specifically be an infrared module or a general imaging module, and the lens assembly 01 is connected to the module base 03.

[0085] In one embodiment, the lens assembly 01 is connected to the module base 03 via an adhesive component 02, enabling assembly to form a module structure. The adhesive component 02 may include, but is not limited to, AA adhesive, and its placement ensures a reliable seal against dust and water.

[0086] In another embodiment, the lens assembly 01 and the module base 03 are connected by a threaded connection so that they can be assembled to form a module structure.

[0087] In another implementation, the lens assembly 01 and the module base 03 are threaded together, and then reinforced at the connection point with adhesive to ensure dustproof and waterproof performance.

[0088] Based on any of the above embodiments, please refer to Figure 8 , Figure 9 , Figure 10 , Figure 11 The module base 03 contains an imaging circuit board assembly 04 and a main control circuit board assembly 08. The imaging circuit board assembly 04, the heating element 3, and the shutter 4 are all connected to the main control circuit board assembly 08.

[0089] The imaging circuit board assembly 04 is mainly used to collect light and form image information. The image information is transmitted to the main control circuit board assembly 08. The main control circuit board assembly 08 can perform image processing operations such as merging, deleting, and transmitting image information to the outside world, as well as power supply regulation and signal compression.

[0090] In one specific embodiment, the imaging circuit board assembly 04 is a detector PCBA, a component assembled from detector-related devices and a PCB board, which can achieve the technical effect of collecting light and forming image information.

[0091] The imaging circuit board assembly 04 is located inside the module base 03, and the shutter 4 is located inside the lens mount 1. A relatively large distance is formed between the shutter 4 and the imaging circuit board assembly 04. When the shutter blades of the shutter 4 rotate to open and close, the impact of friction dust on the imaging circuit board assembly 04 can be reduced, thus reducing imaging risks and ensuring image quality.

[0092] Both the imaging circuit board assembly 04 and the main control circuit board assembly 08 can be locked onto the module base 03 by the first screw 05. The rear shell 09 is locked onto the module base 03 by the second screw 011, and a sealing element 010 is provided between the two. The sealing element 010 can be EPDM (Ethylene-Propylene-Diene Monomer), silicone rubber, CIPG (Cured-In-Place Gasket), FIPG (Formed-In-Place Gasket), etc., to achieve the purpose of sealing, dustproofing and waterproofing by filling gaps.

[0093] The imaging circuit board assembly 04 has a first heat sink 06 on the side closest to the main control circuit board assembly 08, and the main control circuit board assembly 08 has a second heat sink 07 on the side closest to the imaging circuit board assembly 04. Both the first heat sink 06 and the second heat sink 07 are used for heat dissipation. Specifically, the first heat sink 06 can be a thermal pad, such as a thermally conductive gel or thermally conductive grease; the second heat sink 07 can be a heat sink plate, such as an aluminum alloy heat sink plate, including but not limited to commonly used aluminum alloy models such as ADC12, 6061, 6063, 1050, 1070, and 5052. In addition, the surface of the second heat sink 07 can be left untreated or treated with black anodizing to increase blackbody radiation heat dissipation and improve heat dissipation efficiency, depending on the specific application requirements.

[0094] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0095] The lens assembly and imaging module provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A lens assembly, characterized in that, include: Mirror base (1); The lens assembly (2) includes a first lens (21) and at least one second lens (22) arranged sequentially along the optical path direction, wherein the first lens (21) and the second lens (22) are both disposed within the lens mount (1); The shutter (4) is located inside the lens mount (1), and the shutter (4) is located on the side of the first lens (21) near the second lens (22); A heating element (3) is disposed inside the lens mount (1) and is attached to the side of the first lens (21) near the second lens (22) for heating the first lens (21).

2. The lens assembly according to claim 1, characterized in that, The heating element (3) includes a heating part (31), which is connected to the mounting groove (11) provided on the inner wall of the lens base (1) on the side close to the second lens (22), and the heating part (31) is attached to the first lens (21) on the side away from the second lens (22).

3. The lens assembly according to claim 1, characterized in that, The heating element (3) includes a first communication part (33) and a heating part (31). The heating part (31) is fitted to the first lens (21). One end of the first communication part (33) is connected to the heating part (31), and the other end of the first communication part (33) extends out of the lens base (1) and is used to connect to the main control circuit board assembly (08).

4. The lens assembly according to claim 3, characterized in that, The first communication unit (33) includes a first bending part (331), a second bending part (332) and a third bending part (333) connected in sequence. The first bending part (331) is connected to the heating part (31). The second bending part (332) includes a first part (3321) that is bent relative to the first bending part (331) and fits against the inner wall of the lens mount (1), and a second part (3322) that is bent relative to the first part (3321) and located between the side of the shutter (4) and the inner wall of the lens mount (1). The third bending part (333) extends out of the lens mount (1) and is connected to the main control circuit board assembly (08).

5. The lens assembly according to claim 3, characterized in that, The shutter (4) includes a body (41), the body (41) is provided with at least one clearance part (44) in the circumferential direction, and a fitting part (45) connecting the clearance part (44). The fitting part (45) is fitted to the inner wall of the lens mount (1). A clearance gap (8) is provided between the clearance part (44) and the inner wall of the lens mount (1). The clearance gap (8) is used for the passage of the first communication unit (33). A fixing part (43) is provided between the edge of the avoidance part (44) and the edge of the window (46) of the body (41), and the fixing part (43) is connected to the mirror base (1).

6. The lens assembly according to claim 1, characterized in that, The shutter (4) includes a body (41) and a second communication unit (42) connected to the body (41). The second communication unit (42) extends away from the body (41) and is used to connect to the main control circuit board assembly (08).

7. The lens assembly according to claim 1, characterized in that, The shutter (4) is located between the first lens (21) and the second lens (22) adjacent to the first lens (21); Alternatively, the shutter (4) may be located between two adjacent second lenses (22).

8. The lens assembly according to claim 1, characterized in that, It also includes a front pressure ring (6), which is connected to the lens mount (1), and the first lens (21) and the front pressure ring (6) are connected in a sealed manner.

9. An imaging module, characterized in that, It includes a lens assembly (01) as described in any one of claims 1 to 8 and a module base (03), wherein the lens assembly (01) is connected to the module base (03).

10. The imaging module according to claim 9, characterized in that, The module base (03) is provided with an imaging circuit board assembly (04) and a main control circuit board assembly (08). The imaging circuit board assembly (04), the heating element (3) and the shutter (4) are all signal connected to the main control circuit board assembly (08).

Images