Infrared thermal imager capable of automatic focusing

Abstract

The utility model relates to an infrared thermal imager capable of realizing automatic focusing, which comprises an infrared main control module and a front shell assembly, the front shell assembly comprises an infrared objective lens group and an electric focusing assembly, and the electric focusing assembly is distributed on the rear side of the infrared objective lens group; an operator sends a focusing instruction, the infrared main control module receives the focusing instruction, simultaneously collects external image information, and quantitatively calculates and processes the differences in the image information; simultaneously, the infrared main control module controls the electric focusing assembly to perform focusing processing according to the processing result. The utility model has the advantages of simple structure, reasonable design, automatic driving of the focusing assembly, greatly improved convenience and precision during focusing of the infrared thermal imager, and improved user experience of the product.

Description

Technical Field

[0001] This utility model relates to the field of infrared thermal imager technology, specifically to an infrared thermal imager capable of automatic focusing. Background Technology

[0002] With the continuous development of science and technology, infrared thermal imagers are increasingly widely used in national defense, industry, and medical fields. Infrared thermal imagers belong to the optoelectronic product category, and the imaging component is a crucial part of it. Due to differences in the operating environment or the distance of the observed target, operators need to adjust the focusing of the imaging component to obtain a clear image. Currently, most infrared thermal imagers on the market use a manual rotating focusing wheel to adjust the distance between the optical lens and the infrared detector to achieve focusing. A few also use manual adjustment of the infrared detector's position to achieve focusing.

[0003] However, manual focusing of infrared thermal imagers has some inherent drawbacks: for example, the operator needs to use both hands to adjust the focus, which can be limiting in certain situations; manual focusing takes time, and it can easily lead to the loss of fast-moving targets; furthermore, since manual focusing relies on the human eye to directly observe the clarity of the scene, differences in vision or hand tremors may prevent the accurate identification of the target's clarity.

[0004] Therefore, how to achieve speed, accuracy, and convenience in focusing operations of infrared thermal imagers is a problem that those skilled in the art need to consider and solve. Utility Model Content

[0005] This invention addresses the technical problems existing in the prior art by providing an infrared thermal imager capable of automatic focusing.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An infrared thermal imager capable of autofocus includes: an infrared main control module and a front shell assembly. The front shell assembly includes an infrared objective lens group and a motorized focusing assembly. The motorized focusing assembly is distributed on the rear side of the infrared objective lens group. The motorized focusing assembly is communicatively connected to the infrared main control module. The operator sends a focus command, the infrared main control module receives the focus command, and at the same time acquires external image information, performs quantitative calculation and processing on the differences in the image information, and controls the electric focusing component to perform focusing processing according to the processing results.

[0007] The beneficial effects of this utility model are as follows: During use, the operator sends a focus command, the infrared main control module receives the focus command, and at the same time collects external image information, and performs quantitative calculation and processing on the differences in the image information. Meanwhile, the infrared main control module controls the electric focusing component to perform focusing processing based on the processing results.

[0008] This utility model has a simple structure and reasonable design, and automatically drives the focusing component, which greatly improves the convenience and accuracy of focusing the infrared thermal imager and enhances the user's experience of the product.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the electric focusing assembly includes an infrared detector and an electric control unit. The electric control unit is installed on the rear side of the infrared objective lens group and is communicatively connected to the infrared main control module. The infrared detector is installed on the electric control unit, and the electric control unit is used to drive the infrared detector to reciprocate in the front-back direction.

[0011] The advantage of adopting the above-mentioned further solution is that during the focusing process, the infrared detector is driven to move back and forth in the front and back direction by the electronic control to change the distance between the infrared detector and the infrared objective lens group, thereby achieving focusing, which can meet different working scenarios and is convenient to use.

[0012] Furthermore, the electrical control includes a driver, which is mounted on the rear side of the infrared objective lens assembly, connected to the infrared detector, and communicatively connected to the infrared main control module.

[0013] The advantage of adopting the above-mentioned further solution is that during the focusing process, the infrared detector is driven to move back and forth in the front and back direction by the driver to change the distance between the infrared detector and the infrared objective lens group, thereby achieving focusing, which can meet different working scenarios and is convenient to use.

[0014] Furthermore, the driver includes a motor and a lead screw assembly. The motor is mounted on the rear side of the infrared objective lens group, and its driving end extends in the front-to-back direction and is communicatively connected to the infrared main control module. The lead screw assembly extends in the front-to-back direction, and one end of it is fixedly connected to the driving end of the motor. The infrared detector is fixedly connected to the slider in the lead screw assembly.

[0015] The beneficial effect of adopting the above-mentioned further solution is that during the focusing process, the motor drives the lead screw assembly to run, and the lead screw in the lead screw assembly converts its own rotation into the linear movement of the slider on it, so that the slider drives the infrared detector to move back and forth in the front and back direction to change the distance between the infrared detector and the infrared objective lens group, thereby achieving focusing, so as to meet different working scenarios and be convenient to use.

[0016] Furthermore, the electrical control also includes a mounting base, which is fixedly mounted on the rear side of the infrared objective lens assembly, and the driver is mounted on the mounting base.

[0017] The advantages of adopting the above-mentioned further solution are that it has a simple structure, reasonable design, and convenient assembly by using a fixed base to assemble the motor.

[0018] Furthermore, the electric focusing assembly also includes a motion support, the boss on the motion support being connected to the electric control unit; the infrared detector is mounted on the motion support.

[0019] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The infrared detector is assembled by using a motion bracket, which is convenient for assembly. At the same time, the motion bracket is driven by a driver to achieve the distance between the infrared detector and the infrared objective lens group, thereby achieving focusing, so as to meet different working scenarios and make it easy to use.

[0020] Furthermore, the motion support is also provided with a protrusion, and a limit detector is installed on the fixed base. The limit detector is communicatively connected to the infrared main control module and is used to detect the position of the protrusion to limit the motion support.

[0021] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. During the focusing process, the limit detector is used to detect the real-time position of the protrusion to limit the movement of the infrared detector and avoid excessive movement.

[0022] Furthermore, a guide rod assembly is mounted on the fixed base, and a bearing assembly that cooperates with the guide rod assembly is mounted on the motion bracket.

[0023] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. During the focusing process, the bearing assembly on the moving support cooperates with the guide rod assembly on the fixed seat to achieve the guiding function, making the movement of the moving support and infrared detector more stable.

[0024] Furthermore, it also includes a main housing, which is open at both the front and rear ends; the infrared objective lens group is installed at the front opening of the main housing, the infrared main control module is installed at the rear opening of the main housing, and the electric focusing assembly is distributed inside the main housing; The main housing is also equipped with a button assembly and a display assembly, which are respectively connected to the infrared main control module.

[0025] The advantages of adopting the above-mentioned further solution are that the structure is simple, the design is reasonable, the main shell integrates all the components into one unit, and it is convenient to use; In addition, the button assembly on the main housing facilitates the operation of the entire device, and the display assembly on the main housing facilitates the display of work data.

[0026] This utility model also relates to an automatic focusing method for an infrared thermal imager, which is implemented using an infrared thermal imager capable of automatic focusing as described above, and includes the following specific steps: S1: The operator sends a focus command, the infrared main control module receives the focus command, and at the same time collects external image information; S2: The infrared main control module performs quantitative calculation and processing on the differences in the above image information, and controls the electric focusing component to perform focusing processing based on the processing results.

[0027] The beneficial effect of adopting the above-mentioned further solution is that this utility model also provides an automatic focusing method for an infrared thermal imager. This automatic focusing method is simple in structure, reasonable in design, and automatically drives the focusing component, thereby greatly improving the convenience and accuracy of focusing the infrared thermal imager and enhancing the user's experience with the product. Attached Figure Description

[0028] Figure 1 This is the overall assembly drawing of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is an assembly diagram of the mid-infrared objective lens group and the electric focusing assembly of this utility model; Figure 4 This is a partial exploded view of the mid-infrared objective lens group and the electric focusing assembly of this utility model; Figure 5 This is a flowchart of the automatic focusing method of this utility model.

[0029] The attached diagram lists the components represented by each number as follows: 1. Front housing assembly; 11. Infrared objective lens group; 12. Electric focusing assembly; 121. Mounting base; 122. Motor; 123. Motor processing circuit; 124. Guide rod; 125. Motion support; 126. Bearing; 127. Protrusion; 128. Infrared detector; 129. Boss; 2. Main housing; 3. Button assembly; 4. Infrared main control module; 5. Display assembly; 6. Power supply battery. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0033] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0034] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0035] Example 1 like Figures 1 to 4 As shown, this embodiment provides an infrared thermal imager capable of autofocus, including: an infrared main control module 4 and a front shell assembly 1. The front shell assembly 1 includes an infrared objective lens group 11 and an electric focusing assembly 12. The electric focusing assembly 12 is distributed on the rear side of the infrared objective lens group 11. The electric focusing assembly 12 is communicatively connected to the infrared main control module 4. The operator sends a focus command, the infrared main control module 4 receives the focus command, and at the same time collects external image information, and performs quantitative calculation and processing on the differences in the image information. Meanwhile, the infrared main control module 4 controls the electric focusing component 12 to perform focusing processing according to the above processing results.

[0036] During use, the operator sends a focus command, the infrared main control module 4 receives the focus command, and at the same time collects external image information, and performs quantitative calculation and processing on the differences in the image information. Meanwhile, the infrared main control module 4 controls the electric focusing component 12 to perform focusing processing based on the processing results.

[0037] Preferably, in this embodiment, the infrared objective lens group 11 is preferably cylindrical in shape, which is based on existing technology, and its specific structure and principle will not be described in detail here.

[0038] In addition, the infrared main control module 4 mentioned above uses existing technology, and its specific structure and operating principle will not be described in detail here.

[0039] Preferably, this embodiment also includes a power supply battery 6, which supplies power to various components via a circuit connected to the infrared main control module 4.

[0040] In addition, the aforementioned power supply battery 6 is preferably a storage battery in the prior art, which needs to be replaced regularly to ensure the normal operation of the entire device.

[0041] This embodiment has a simple structure and reasonable design, and automatically drives the focusing component, which greatly improves the convenience and accuracy of focusing the infrared thermal imager and enhances the user's experience with the product.

[0042] Example 2 Based on Embodiment 1, in this embodiment, the electric focusing assembly 12 includes an infrared detector 128 and an electrical control. The electrical control is installed on the rear side of the infrared objective lens group 11 and is communicatively connected to the infrared main control module 4. The infrared detector 128 is installed on the rear side of the electrical control and is connected to the electrical control. The electrical control is used to drive the infrared detector 128 to reciprocate in the front-back direction.

[0043] During the focusing process, the infrared detector 128 is driven to move back and forth in the front and back direction by the electronic control to change the distance between the infrared detector 128 and the infrared objective lens group 11, thereby achieving focusing to meet different working scenarios and making it easy to use.

[0044] Preferably, in this embodiment, the infrared detector 128 is equipped with an infrared detector circuit to ensure the normal operation of the infrared detector 128.

[0045] Example 3 Based on Embodiment 2, in this embodiment, the electrical control includes a driver, which is installed on the rear side of the infrared objective lens group 11, connected to the infrared detector 128, and communicatively connected to the infrared main control module 4.

[0046] During the focusing process, the infrared detector 128 is driven to move back and forth in the front and back direction by the driver to change the distance between the infrared detector 128 and the infrared objective lens group 11, thereby achieving focusing to meet different working scenarios and making it easy to use.

[0047] Example 4 Based on Embodiment 3, in this embodiment, the driver includes a motor 122 and a lead screw assembly. The motor 122 is mounted on the rear side of the infrared objective lens group 11, and its driving end extends in the front-back direction and is communicatively connected to the infrared main control module 4. The lead screw assembly is mounted on the rear side of the motor 122, extends in the front-back direction, and one end of the lead screw assembly is fixedly connected to the driving end of the motor 122. The infrared detector 128 is fixedly connected to the slider in the lead screw assembly.

[0048] During the focusing process, the motor 122 drives the lead screw assembly to operate. The lead screw in the lead screw assembly converts its own rotation into the linear movement of the slider with its threaded sleeve. This causes the slider to drive the infrared detector 128 to move back and forth in the front and back direction, thereby changing the distance between the infrared detector 128 and the infrared objective lens group 11, thus achieving focusing. This meets different operating scenarios and is easy to use.

[0049] Alternatively, the aforementioned actuator can also be a small cylinder. The telescopic end of the small cylinder extends in the front-to-back direction and is fixedly connected to the infrared detector 128, which is communicatively connected to the infrared main control module 4. During focusing, the infrared main control module 4 controls the telescopic movement of the small cylinder. The telescopic movement of the small cylinder drives the infrared detector 128 to reciprocate in the front-to-back direction, thereby changing the distance between the infrared detector 128 and the infrared objective lens group 11, thus achieving focusing. This meets different operating scenarios and is convenient to use.

[0050] Example 5 Based on any one of Embodiments 3 to 4, in this embodiment, the electrical control further includes a fixing base 121, which is fixedly installed on the rear side of the infrared objective lens group 11, and the driver is installed on the fixing base 121.

[0051] The solution has a simple structure and reasonable design. The motor 122 is assembled using the fixed base 121, which makes assembly convenient.

[0052] Preferably, in this embodiment, the fixing seat 121 is preferably cylindrical with an open rear end, and the front end of the fixing seat 121 can be closed or open.

[0053] Alternatively, the aforementioned fixing base 121 can also adopt a polygonal cross-section structure, which can be designed according to specific requirements.

[0054] Example 6 Based on Embodiment 5, in this embodiment, the electric focusing assembly 12 further includes a motion bracket 125, the boss 129 on the motion bracket 125 is connected to the electric control component; the infrared detector 128 is mounted on the motion bracket 125.

[0055] The solution has a simple structure and reasonable design. The infrared detector 128 is assembled using a motion bracket 125, which is convenient to assemble. At the same time, the motion bracket 125 is driven by a driver to move, thereby realizing the distance between the infrared detector 128 and the infrared objective lens group 11, thus achieving focusing, so as to meet different working scenarios and make it easy to use.

[0056] Preferably, in this embodiment, the shape of the motion support 125 is adapted to the shape of the fixed base 121, which can be a circular block or a block with a polygonal cross-section.

[0057] Preferably, in this embodiment, the boss 129 is preferably cylindrical.

[0058] Alternatively, the aforementioned boss 129 can also adopt other suitable geometries, such as a block structure.

[0059] Example 7 Based on Embodiment 6, in this embodiment, the motion support 125 is further provided with a protrusion 127, and a limit detector is installed on the fixed base 121. The limit detector is communicatively connected to the infrared main control module 4 and is used to detect the position of the protrusion 127 to limit the motion support 125.

[0060] The scheme has a simple structure and reasonable design. During the focusing process, the limit detector is used to detect the real-time position of the protrusion 127 to limit the movement of the infrared detector 128 and avoid excessive movement.

[0061] Preferably, in this embodiment, the protrusion 127 is preferably a rectangular block structure.

[0062] In addition, the aforementioned limit detector uses two grating sensors or two Hall sensors. The two sensors are respectively set at both ends of the movement trajectory of the motion bracket 125 to limit the end position of the movement of the motion bracket 125.

[0063] Preferably, in this embodiment, a motor processing circuit 123 is also fixedly installed on the aforementioned fixed base 121. The motor processing circuit 123 is connected to the motor 122 and the infrared main control module 4 through lines respectively.

[0064] In addition, the motor processing circuit 123 is also equipped with the limit detector, which is a grating sensor or a Hall sensor.

[0065] Example 8 Based on any one of Embodiments 6 to 7, in this embodiment, a guide rod assembly is installed on the fixed base 121, and a bearing assembly that cooperates with the guide rod assembly is installed on the motion bracket 125.

[0066] The scheme has a simple structure and reasonable design. During the focusing process, the bearing assembly on the motion bracket 125 cooperates with the guide rod assembly on the fixed base 121 to achieve the guiding function, making the movement of the motion bracket 125 and the infrared detector 128 more stable.

[0067] Preferably, in this embodiment, the guide rod assembly includes at least one guide rod 124, which is fixedly mounted on the fixed base 121 and extends in the front-rear direction; the bearing assembly includes at least one bearing 126, each bearing 126 is fixedly mounted on the motion bracket 125 and slidably sleeved on the guide rod 124.

[0068] In addition, two guide rods 124 are preferred, and two bearings 126 are preferred, with the two bearings 126 corresponding to the two guide rods 124 respectively and slidingly engaged.

[0069] Alternatively, a guide tube can be used to replace the aforementioned bearing.

[0070] Example 9 Based on the above embodiments, this embodiment also includes a main housing 2, which has open front and rear ends; the infrared objective lens group 11 is installed at the front open end of the main housing 2, the infrared main control module 4 is installed at the rear open end of the main housing 2, and the electric focusing assembly 12 is distributed inside the main housing 2. The main housing 2 is also equipped with a button assembly 3 and a display assembly 5, which are respectively connected to the infrared main control module 4.

[0071] The solution has a simple structure and reasonable design. It integrates all components into one unit using the main shell 2, making it easy to use. In addition, the button assembly 3 on the main housing 2 facilitates the operation of the entire device, and the display assembly 5 on the main housing 2 facilitates the display of work data.

[0072] Preferably, in this embodiment, the main housing 2 is preferably a cylindrical housing, which is more aesthetically pleasing overall.

[0073] Preferably, in this embodiment, the button assembly 3 includes multiple buttons, which are respectively installed in multiple through holes on the top of the main housing 2 and are respectively connected to the infrared main control module 4.

[0074] Preferably, in this embodiment, the display component 5 includes an eyepiece group and a display screen. The eyepiece group is installed at the open end of the rear end of the main housing 2, and the display screen is installed at the corresponding rear end of the main housing 2.

[0075] Example 10 Based on the above embodiments, such as Figure 5 As shown, this embodiment also provides an automatic focusing method for an infrared thermal imager, which is implemented using an infrared thermal imager capable of automatic focusing as described above, and includes the following specific steps: S1: The operator sends a focus command, and the infrared main control module 4 receives the focus command and simultaneously acquires external image information. S2: The infrared main control module 4 performs quantitative calculation and processing on the differences in the above image information, and controls the electric focusing component 12 to perform focusing processing based on the above processing results.

[0076] This embodiment also provides an automatic focusing method for an infrared thermal imager. This automatic focusing method is simple, reasonably designed, and automatically drives the focusing components, thereby greatly improving the convenience and accuracy of focusing the infrared thermal imager and enhancing the user's experience with the product.

[0077] This invention provides an infrared thermal imager capable of autofocus and its autofocus method, the specific steps of which are as follows: S1: The operator sends a focus command, and the infrared main control module 4 receives the focus command and simultaneously acquires external image information. S2: The infrared main control module 4 performs quantitative calculation and processing on the differences in the above image information, and controls the electric focusing component 12 to perform focusing processing based on the above processing results.

[0078] During this process, the infrared main control module 4 quantifies and processes the clarity of the infrared image using the "grayscale gradient method" and feeds back the processing result to the infrared main control module 4. The infrared main control module 4 controls the electric focusing component 12 to perform focusing operation on the infrared detector. The infrared main control module 4 begins to execute the "coarse adjustment" strategy, controlling the electric focusing component 12 to move the infrared detector to a clear target area in 0.02mm increments. This process takes less than 0.3 seconds. Once the image is within the clear area, the infrared main control module 4 begins to execute the "fine adjustment" strategy, moving the infrared detector to the clearest and most precise target position in 0.002mm increments. This process takes less than 0.2 seconds. At this point, the infrared main control module 4 indicates that focusing is complete and the electric focusing component 12 stops working. This completes the one-button autofocus operation. The entire focusing process is completed within 0.5 seconds. The lower end of the main housing 2 is also equipped with a power supply battery 6, which supplies power to the infrared main control module 4.

[0079] The present invention proposes an infrared thermal imager capable of autofocus and its autofocus method, the beneficial effects of which are: This invention, an electrically focusing infrared thermal imager, solves the problems of poor convenience, insufficient accuracy, and slow response speed of existing infrared thermal imagers when manually focusing. By incorporating target information judgment into a software algorithm, this invention automatically drives the focusing component, thereby greatly improving the convenience and accuracy of focusing and enhancing the user's experience.

[0080] To address the issues of poor convenience, insufficient accuracy, and slow response speed in manual focusing of existing infrared thermal imagers, this invention provides an infrared thermal imager capable of automatic focusing and its automatic focusing method. This infrared thermal imager judges the target image information and then automatically triggers the motor to move, driving the focusing component to move along the optical axis, thereby achieving automatic focusing of the target and realizing the function of one-click, fast, and accurate automatic focusing.

[0081] The infrared thermal imager and its autofocus method that can achieve autofocus provided by this utility model have the following advantages: 1. The infrared detector is electrically controlled, and the movement of the infrared detector is adjusted to achieve the focusing purpose. For different camera models, only the lens needs to be replaced. 2. By designing a compact structure for the motor drive module, the overall size of the electric focusing module can be minimized, thus ensuring that the infrared thermal imager can use electric focusing. 3. It adopts automatic focusing operation, and the entire focusing process is completed within 0.5 seconds with a focusing error of less than 0.01mm, which can achieve fast and accurate focusing operation; 4. With just one-click focusing, non-professional operators can quickly and accurately adjust the focus, improving the ease of use of the thermal imager.

[0082] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. An infrared thermal imager capable of autofocus, characterized in that, include: The infrared main control module (4) and the front shell assembly (1) include an infrared objective lens group (11) and an electric focusing assembly (12). The electric focusing assembly (12) is located on the rear side of the infrared objective lens group (11). The electric focusing assembly (12) is communicatively connected to the infrared main control module (4).

2. The infrared thermal imager capable of autofocus according to claim 1, characterized in that, The electric focusing assembly (12) includes an infrared detector (128) and an electric control unit. The electric control unit is installed on the rear side of the infrared objective lens group (11) and is communicatively connected to the infrared main control module (4). The infrared detector (128) is installed on the electric control unit, and the electric control unit is used to drive the infrared detector (128) to move back and forth in the front-back direction.

3. The infrared thermal imager capable of autofocus according to claim 2, characterized in that, The electrical control includes a driver, which is installed on the rear side of the infrared objective lens group (11), connected to the infrared detector (128), and communicatively connected to the infrared main control module (4).

4. The infrared thermal imager capable of autofocus according to claim 3, characterized in that, The driver includes a motor (122) and a lead screw assembly. The motor (122) is mounted on the rear side of the infrared objective lens group (11), and its driving end extends in the front-back direction and is communicatively connected to the infrared main control module (4). The lead screw assembly extends in the front-back direction, and one end of it is fixedly connected to the driving end of the motor (122). The infrared detector (128) is fixedly connected to the slider in the lead screw assembly.

5. The infrared thermal imager capable of autofocus according to claim 3, characterized in that, The electrical control also includes a mounting base (121), which is fixedly mounted on the rear side of the infrared objective lens group (11), and the driver is mounted on the mounting base (121).

6. The infrared thermal imager capable of autofocus according to claim 5, characterized in that, The electric focusing assembly (12) also includes a motion bracket (125), on which a boss (129) is connected to the electric control unit; the infrared detector (128) is mounted on the motion bracket (125).

7. The infrared thermal imager capable of autofocus according to claim 6, characterized in that, The motion support (125) is also provided with a protrusion (127), and a limit detector is installed on the fixed seat (121). The limit detector is connected to the infrared main control module (4) for detecting the position of the protrusion (127) to limit the motion support (125).

8. The infrared thermal imager capable of autofocus according to claim 6, characterized in that, A guide rod assembly is mounted on the fixed base (121), and a bearing assembly that cooperates with the guide rod assembly is mounted on the motion bracket (125).

9. The infrared thermal imager capable of autofocus according to any one of claims 1-8, characterized in that, It also includes a main housing (2), which has open front and rear ends; the infrared objective lens group (11) is installed at the front open end of the main housing (2), the infrared main control module (4) is installed at the rear open end of the main housing (2), and the electric focusing assembly (12) is distributed inside the main housing (2); The main housing (2) is also equipped with a button assembly (3) and a display assembly (5), which are respectively connected to the infrared main control module (4).

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