Dual-light focusing structure and dual-light thermal imager

Abstract

The utility model provides a dual-light focusing structure and a dual-light thermal imager. The dual-light focusing structure comprises a first optical lens assembly, a first image processing unit, a second optical lens assembly, a second image processing unit and a coaxial focusing assembly. The first image processing unit is located behind the light path of the first optical lens assembly and processes the light converged by the first optical lens assembly to form a first image. The second image processing unit is located behind the light path of the second optical lens assembly and processes the light converged by the second optical lens assembly to form a second image. And the coaxial focusing assembly is used for simultaneously driving the first optical lens assembly and the second optical lens assembly to move and respectively focusing the first optical lens assembly and the second optical lens assembly. The dual-light focusing structure and the dual-light thermal imager provided by the utility model are simple in focusing mode, convenient to use and beneficial to reducing imaging errors.

Description

Technical Field

[0001] The present application relates to the technical field of optical equipment, and in particular to a dual-light focusing structure and a dual-light thermal imager. Background Art

[0002] To improve functionality and precision, optical devices often incorporate more than one set of optical imaging components, such as a visible light imaging component and an infrared imaging component. Existing dual-optical optical devices typically feature two focusing knobs to adjust the focus of the infrared and visible light lenses, respectively. However, using two focusing knobs independently can easily cause the two optical systems to lose synchronization, requiring refocusing when switching fields of view. This makes the focusing process cumbersome and inconvenient, causing user frustration. Summary of the Invention

[0003] Based on this, the present application provides a dual-light focusing structure and a dual-light thermal imager to improve the problems of cumbersome focusing and inconvenient use in the prior art.

[0004] To achieve the above objectives, the technical solution of the embodiment of the present application is implemented as follows:

[0005] On the one hand, an embodiment of the present application provides a dual-light focusing structure, including a first optical lens assembly, a first image processing unit, a second optical lens assembly, a second image processing unit, and a coaxial focusing assembly;

[0006] The first image processing unit is located behind the optical path of the first optical lens assembly and processes the light converged by the first optical lens assembly to form a first image;

[0007] The second image processing unit is located behind the optical path of the second optical lens assembly and processes the light converged by the second optical lens assembly to form a second image;

[0008] The coaxial focusing assembly is used to simultaneously drive the first optical lens assembly and the second optical lens assembly to move, and respectively focus the first optical lens assembly and the second optical lens assembly.

[0009] In one embodiment, the coaxial focusing assembly includes a rotating shaft, a first adjusting gear and a second adjusting gear, wherein the first adjusting gear and the second adjusting gear are respectively passed through and fixed on the rotating shaft;

[0010] The first optical lens assembly is provided with a first rack, the second optical lens assembly is provided with a second rack, the first adjustment gear is meshed with the first rack, and the second adjustment gear is meshed with the second rack;

[0011] The rotating shaft is used to drive the first adjusting gear and the second adjusting gear to rotate coaxially, so as to respectively drive the first optical lens assembly and the second optical lens assembly to move.

[0012] In one embodiment, the number of teeth on the first adjusting gear is greater than the number of teeth on the second adjusting gear.

[0013] In one embodiment, the focal length of the first optical lens assembly is d, and the focal length of the second optical lens assembly is D, wherein d=nD, n≥2; and the gear ratio of the first adjustment gear and the second adjustment gear is n:1.

[0014] In one embodiment, the first optical lens assembly is a visible light lens assembly, and the second optical lens assembly is an infrared light lens assembly.

[0015] In one embodiment, the first adjusting gear and the second adjusting gear are helical gears respectively.

[0016] In one embodiment, the dual-light focusing structure further includes a fixing frame, wherein the fixing frame is provided with two mounting through holes in parallel, namely a first mounting through hole and a second mounting through hole, wherein the first mounting through hole is used to mount the first optical lens assembly, and the second mounting through hole is used to mount the second optical lens assembly;

[0017] A support block is protruded from the outer wall of the fixing frame, and a through hole is provided on the support block. The axial direction of the through hole is perpendicular to the axial directions of the first mounting through hole and the second mounting through hole, and the through hole is used to pass the rotating shaft;

[0018] A first guide hole and a second guide hole are respectively provided on the outer wall of the fixing frame. The first guide hole is used to pass the first rack, and the second guide hole is used to pass the second rack. The rotation of the rotating shaft drives the first rack to move back and forth in the first guide hole, and drives the second rack to move back and forth in the second guide hole.

[0019] In one embodiment, the first adjusting gear and the second adjusting gear are respectively located on two sides of the supporting block.

[0020] On the other hand, an embodiment of the present application provides a dual-light thermal imager, including the dual-light focusing structure as described above, and also including a housing and a handwheel, the dual-light focusing structure is installed in the housing, and the housing is provided with a mounting hole, the dual-light focusing structure includes a rotating shaft, one end of the rotating shaft extends out of the housing through the mounting hole and is fixedly connected to the handwheel.

[0021] In one embodiment, the dual-light thermal imager further includes a display module for displaying the fusion of the first image and the second image.

[0022] This application has at least the following beneficial effects: The dual-light focusing structure of the embodiment of the present application uses a coaxial focusing assembly to simultaneously focus and adjust the first optical lens assembly and the second optical lens assembly, enabling synchronous imaging of the two. This focusing method is very simple and easy to use, effectively improving the user experience. The dual-light thermal imager of the embodiment of the present application includes the aforementioned dual-light focusing structure and therefore also has the aforementioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the dual-light thermal imager according to an embodiment of the present application.

[0024] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the dual-light thermal imager.

[0025] Figure 3 Schematic diagram of the structure of the fixing frame according to an embodiment of the present application.

[0026] Figure 4 This is a schematic diagram of the combined structure of a coaxial focusing assembly and two optical lens assemblies according to an embodiment of the present application.

[0027] The meanings of the reference numerals in the accompanying drawings are as follows:

[0028] 1. Housing; 2. First optical lens assembly; 21. First lens barrel; 22. First lens assembly; 23. First rack; 3. Second optical lens assembly; 31. Second lens barrel; 32. Second lens assembly; 33. Second rack; 4. Handwheel; 5. First image processing unit; 6. Second image processing unit; 7. Coaxial focusing assembly; 71. First adjusting gear; 72. Rotating shaft; 73. Second adjusting gear; 8. Fixing frame; 81. First mounting through hole; 82. Second mounting through hole; 83. First guide hole; 84. Second guide hole; 85. Support block; 851. Through hole; 9. Display module. DETAILED DESCRIPTION

[0029] The technical solution of this application is further elaborated in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit the implementation of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] In the description of this application, it should be understood that the terms "center," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] See also Figure 1 and Figure 2 The dual-light thermal imager of the embodiment of the present application includes a housing 1, a display module 9, and a dual-light focusing structure arranged in the housing 1.

[0034] The dual-light focusing structure includes a first optical lens assembly 2 , a first image processing unit 5 , a second optical lens assembly 3 , a second image processing unit 6 and a coaxial focusing assembly 7 .

[0035] The first image processing unit 5 is located behind the optical path of the first optical lens assembly 2 and processes the light converged by the first optical lens assembly 2 to form a first image.

[0036] The second image processing unit 6 is located behind the optical path of the second optical lens assembly 3 and processes the light converged by the second optical lens assembly 3 to form a second image.

[0037] The coaxial focusing assembly 7 is used to simultaneously drive the first optical lens assembly 2 and the second optical lens assembly 3 to move, and to focus the first optical lens assembly 2 and the second optical lens assembly 3 respectively.

[0038] The coaxial focusing assembly 7 moves the lens forward and backward to form clear images of objects at different distances. This process is called focusing.

[0039] Specifically, if Figure 3 and Figure 4 As shown, in this embodiment, the dual-light focusing structure also includes a fixing frame 8, which is provided with two mounting through holes in parallel, namely a first mounting through hole 81 and a second mounting through hole 82. The first mounting through hole 81 is used to install the first optical lens assembly 2, and the second mounting through hole 82 is used to install the second optical lens assembly 3.

[0040] The coaxial focusing assembly 7 includes a rotating shaft 72, a first adjusting gear 71 and a second adjusting gear 73. The centers of the first adjusting gear 71 and the second adjusting gear 73 are respectively passed through and fixed on the rotating shaft 72. When the rotating shaft 72 rotates, the first adjusting gear 71 and the second adjusting gear 73 can rotate synchronously. At the same time, the rotation angles of the first adjusting gear 71 and the second adjusting gear 73 are the same.

[0041] like Figure 2 As shown, the first optical lens assembly 2 includes a first lens barrel 21 , a first lens assembly 22 disposed in the first lens barrel 21 , and a first rack 23 disposed at the bottom of the first lens barrel 21 (in the direction shown in the figure).

[0042] The second optical lens assembly 3 includes a second lens barrel 31, a second lens assembly 32 arranged in the second lens barrel 31, and a second rack 33 arranged at the bottom of the second lens barrel 31. The first adjustment gear 71 is engaged with the first rack 23, and the second adjustment gear 73 is engaged with the second rack 33.

[0043] The rotating shaft 72 is used to drive the first adjusting gear 71 and the second adjusting gear 73 to rotate coaxially, so as to respectively drive the first optical lens assembly 2 and the second optical lens assembly 3 to move.

[0044] A support block 85 is protruding from the outer wall of the fixing frame 8, and a through hole 851 is provided on the support block 85. The axial direction of the through hole 851 is perpendicular to the axial directions of the first mounting through hole 81 and the second mounting through hole 82. The rotating shaft 72 is passed through the through hole 851, and the first adjusting gear 71 and the second adjusting gear 73 are respectively located on both sides of the support block 85.

[0045] The outer wall of the fixed frame 8 is provided with a first guide hole 83 and a second guide hole 84. The first guide hole 83 extends axially along the first mounting hole 81, while the second guide hole 84 extends axially along the second mounting hole 82. The first rack 23 is disposed within the first guide hole 83. The upper end of the first rack 23 is fixedly connected to the first lens barrel 21, and the lower end of the first rack 23 extends out of the first guide hole 83, with its teeth meshing with the first adjustment gear 71. The second rack 33 is disposed within the second guide hole 84. The upper end of the second rack 33 is fixedly connected to the second lens barrel 31, and the lower end of the second rack 33 extends out of the second guide hole 84, with its teeth meshing with the second adjustment gear 73. When the rotating shaft 72 rotates, it drives the first and second adjustment gears 71, 73, which are fixedly connected thereto, to rotate together. The first adjustment gear 71 drives the first rack 23 to reciprocate within the first guide hole 83, and the second adjustment gear 73 drives the second rack 33 to reciprocate within the second guide hole 84.

[0046] In this embodiment, the number of teeth on the first adjustment gear 71 is greater than the number of teeth on the second adjustment gear 73. For example, the focal length of the first optical lens assembly 2 is d, and the focal length of the second optical lens assembly 3 is D, where d = nD, and n ≥ 2; and the gear ratio between the first adjustment gear 71 and the second adjustment gear 73 is n:1. In this embodiment, n = 2, the first optical lens assembly 2 is a visible light lens assembly, and the second optical lens assembly 3 is an infrared lens assembly. When the first adjustment gear 71 and the second adjustment gear 73 rotate to the same angle, the infrared lens assembly moves n times the distance of the visible light lens assembly, allowing both lenses to achieve a sharp focus simultaneously.

[0047] Display module 9 includes a processor and a display screen. Display module 9 is located behind first image processing unit 5 and second image processing unit 6 (on the side away from first optical lens assembly 2 or second optical lens assembly 3). The processor is used to fuse the first and second images and display them on the display screen. Of course, if the user only selects one optical system (optical lens assembly and image processing unit) for observation, the processor does not need to perform image fusion processing and displays them directly on the display screen.

[0048] The first adjusting gear 71 and the second adjusting gear 73 may be provided as helical gears.

[0049] like Figure 1 and Figure 2 As shown, the dual-light thermal imager of this embodiment may further include a handwheel 4. A mounting hole is provided on the housing 1. One end of the rotating shaft 72 extends out of the housing 1 from the mounting hole and is fixedly connected to the handwheel 4. The handwheel 4 is located on the outer wall of the housing 1. Rotating the handwheel 4 can drive the rotating shaft 72 to rotate together to achieve the focusing function of the first optical lens assembly 2 and the second optical lens assembly 3.

[0050] When the dual-light thermal imager of the embodiment of the present application is working, the visible light of the target object is focused on the first image processing unit through the lens of the first optical lens assembly to form a first image; the infrared light of the target object is focused on the second image processing unit through the lens of the second optical lens assembly to form a second image; the display module fuses the first image and the second image and displays them on the display screen for observation.

[0051] In a coaxial focusing assembly, the visible light lens (first lens assembly) and the infrared lens (second lens assembly) slide back and forth within their respective barrels. The rotation of the gears (first and second adjustment gears) and racks (first and second racks) is used to translate the gears' rotation into linear movement. By connecting the two adjustment gears through a rotating shaft, a single axis can simultaneously focus both lenses (visible light and infrared), making focusing simple and convenient.

[0052] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0053] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A dual-light focusing structure, characterized in that: It comprises a first optical lens assembly (2), a first image processing unit (5), a second optical lens assembly (3), a second image processing unit (6) and a coaxial focusing assembly (7); The first image processing unit (5) is located behind the optical path of the first optical lens assembly (2), and processes the light converged by the first optical lens assembly (2) to form a first image; The second image processing unit (6) is located behind the optical path of the second optical lens assembly (3), and processes the light converged by the second optical lens assembly (3) to form a second image; The coaxial focusing assembly (7) is used to simultaneously drive the first optical lens assembly (2) and the second optical lens assembly (3) to move, and respectively focus the first optical lens assembly (2) and the second optical lens assembly (3).

2. The dual-light focusing structure according to claim 1, wherein: The coaxial focusing assembly (7) comprises a rotating shaft (72), a first adjusting gear (71) and a second adjusting gear (73), wherein the first adjusting gear (71) and the second adjusting gear (73) are respectively passed through and fixed on the rotating shaft (72); The first optical lens assembly (2) is provided with a first rack (23), the second optical lens assembly (3) is provided with a second rack (33), the first adjusting gear (71) is meshed with the first rack (23), and the second adjusting gear (73) is meshed with the second rack (33); The rotating shaft (72) is used to drive the first adjusting gear (71) and the second adjusting gear (73) to rotate coaxially, thereby respectively driving the first optical lens assembly (2) and the second optical lens assembly (3) to move.

3. The dual-light focusing structure according to claim 2, wherein: The number of teeth of the first adjusting gear (71) is greater than the number of teeth of the second adjusting gear (73).

4. The dual-light focusing structure according to claim 3, wherein: The focal length of the first optical lens assembly (2) is d, and the focal length of the second optical lens assembly (3) is D, wherein d=nD, n≥2; and the gear ratio of the first adjusting gear (71) and the second adjusting gear (73) is n:

1.

5. The dual-light focusing structure according to claim 2, wherein: The first optical lens assembly (2) is a visible light lens assembly, and the second optical lens assembly (3) is an infrared light lens assembly.

6. The dual-light focusing structure according to claim 2, wherein: The first adjusting gear (71) and the second adjusting gear (73) are respectively helical gears.

7. The dual-light focusing structure according to claim 2, wherein: The optical lens assembly (2) is mounted on a first mounting hole (81) and a second mounting hole (82). The optical lens assembly (2) is mounted on a first mounting hole (81) and a second mounting hole (82). A support block (85) is protruding from the outer wall of the fixing frame (8), and a through hole (851) is provided on the support block (85). The axial direction of the through hole (851) and the axial directions of the first mounting through hole (81) and the second mounting through hole (82) are perpendicular to each other, and the through hole (851) is used to pass the rotating shaft (72); A first guide hole (83) and a second guide hole (84) are respectively provided on the outer wall of the fixing frame (8), the first guide hole (83) is used to penetrate the first rack (23), and the second guide hole (84) is used to penetrate the second rack (33), and the rotation of the rotating shaft (72) drives the first rack (23) to move back and forth in the first guide hole (83) and drives the second rack (33) to move back and forth in the second guide hole (84).

8. The dual-light focusing structure according to claim 7, wherein: The first adjusting gear (71) and the second adjusting gear (73) are respectively located on both sides of the supporting block (85).

9. A dual-light thermal imager, characterized in that: The invention comprises a dual-light focusing structure as described in any one of claims 1 to 8, and further comprises a housing (1) and a handwheel (4), wherein the dual-light focusing structure is installed in the housing (1), and a mounting hole is provided on the housing (1), and the dual-light focusing structure comprises a rotating shaft (72), one end of the rotating shaft (72) extends out of the housing (1) through the mounting hole and is fixedly connected to the handwheel (4).

10. The dual-light thermal imager according to claim 9, wherein: It also includes a display module (9) for displaying the first image and the second image after fusion.

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