Micro-light thermal-image dual-light fusion night vision device
By combining low light and thermal imaging technology in the night vision instrument, using components such as 90-degree prism and branch refractive channel, clear target recognition under low light conditions is achieved, solving the problem of poor effect of traditional night vision instruments in extremely low light.
Patent Information
- Application Number
- CN202411872319.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-03-28
AI Technical Summary
Traditional night vision devices are not effective in the absence of light at all or with extremely low light, and it is difficult to distinguish target objects with different temperatures. Using thermal imaging alone has the problem of insufficient image details.
The dual-photo fusion technology of micro-photometers is used to organically integrate the objective lens assembly, image tube intensifier and eyepiece assembly, and the combination of low light and thermal imaging is achieved through components such as 90-degree prism, branch refractive channel and thermal fusion assembly.
Provides clear target recognition in low light conditions, obtains richer details through dual-light fusion technology, suitable for completely dark environments and light situations.
Smart Images
Figure CN119717246A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of night vision devices, in particular to a low-light thermal imaging and dual-light fusion night vision device. Background Art
[0002] With the growing demand for night reconnaissance, wildlife observation, and security monitoring, there is an increasing need for devices that can provide clear visual information in low-light conditions. Traditional night vision devices mainly rely on low-light imaging technology, which enables night observation by enhancing visible light or near-infrared light. However, such devices are not effective in the absence of light or in very low light conditions, and have difficulty distinguishing targets of different temperatures.
[0003] In recent years, thermal imaging technology has been introduced into night vision devices. It can detect and display the difference in heat emitted by objects and can work effectively even in completely dark environments. However, using thermal imaging alone has the problem of insufficient image details, especially when it is necessary to identify target features. Therefore, how to combine the advantages of low-light imaging and thermal imaging to improve the overall performance of night vision devices has become a technical problem that needs to be solved urgently. Summary of the invention
[0004] The purpose of the present invention is to provide a low-light thermal imaging dual-light fusion night vision device to solve the problems raised in the background technology.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a low-light thermal imaging dual-light fusion night vision device, comprising an objective lens assembly (1), an objective lens fixing seat (4) is fixed to the rear end of the objective lens assembly, an image tube intensifier (2) is arranged below the objective lens fixing seat (4), a clamping component connecting frame (3) is arranged at the top of the objective lens fixing seat (4), eyepiece assemblies (5) are arranged below and on both sides of the image tube intensifier (2), the opposite ends of the two eyepiece assemblies (5) are movably connected to the outside of the base, a face shell (10) is arranged in front of the base (25), and the face shell (10) A heat fusion component (8) is arranged on the upper side, a group of 90-degree prisms (5) are arranged in the objective lens fixing seat (4), an objective lens group (14) is arranged in the objective lens assembly (1), and an eyepiece lens group (16), a reflective sheet (21), a field lens (22), and an image receiving lens (20) are arranged in the two eyepiece assemblies (5). The image input from the objective lens assembly (5) is refracted into the image tube intensifier (2) through the 90-degree prism (15), and the bottom of the image tube intensifier (2) is symmetrically provided with two branch refraction channels arranged in opposite directions, and the two branch refraction channels are respectively two eyepiece assemblies (5).
[0006] In this embodiment, each of the branch refractive channels has an image receiving lens (20), and a field lens (22) is provided between the image receiving lens (20) in each of the branch refractive channels and the eyepiece lens group (16) in the same branch refractive channel.
[0007] In this embodiment, the field lens (22) is arranged horizontally.
[0008] In this embodiment, each of the field lens lenses (22) has reflecting lenses (21) on both the upper and lower sides, and the reflecting lenses (21) can refract the image refracted from the branch refraction channel into the eyepiece lens group (16) again.
[0009] In this embodiment, a micro-light switch (9) and a thermal fusion switch (11) are respectively provided on both sides of the thermal fusion component (8), and an interface (7) is provided on the top outer wall of the thermal fusion component (8).
[0010] In this embodiment, the face shell (10) is provided with a battery cartridge assembly (12).
[0011] In this embodiment, a reflector mounting plate (13) is mounted on the rear end of each eyepiece assembly (5) by means of screws, and an end of the reflector lens close to the eyepiece lens group (16) is fixed to the inner wall of the reflector mounting plate at an angle of 45 degrees.
[0012] In this embodiment, the eyepiece assembly (5), the reflector mounting plate (13) and the shell behind the eyepiece assembly (5) enclose a cavity for installing the eyepiece lens group (16), and the components from the field lens (22) downward are all arranged inside the base (25).
[0013] In this embodiment, the bottom end of the image tube intensifier (2) is connected to a beam splitter prism (17), the bottom end of the beam splitter prism (17) is connected to a fusion prism (18), and the bottom end of the fusion prism (18) is provided with a display screen (19).
[0014] In this embodiment, each of the cavities is connected to the base (25) via an eyepiece spacing adjustment bolt (6), and the distance between the two eyepiece assemblies (5) can be adjusted by screwing the eyepiece spacing adjustment bolt.
[0015] Compared with the prior art, the technical effects and advantages of the present invention are as follows:
[0016] The low-light thermal imaging dual-light fusion night vision device can provide clear target identification in low-light conditions by combining low-light and thermal imaging technology. The dual-light fusion technology can obtain richer details, allowing users to analyze the target environment more accurately. It is not only suitable for completely dark environments, but also can provide good observation effects in conditions with slight light.
[0017] The key components such as the objective lens assembly (1), the image tube intensifier (2), and the eyepiece assembly (5) are organically integrated together to form a complete system. This integrated design reduces the complexity of the assembly process and improves the overall stability and reliability of the device. The overall design takes into account portability and ease of use and is suitable for a variety of application scenarios.
[0018] By adding a card connecting frame (3) to the objective lens fixing seat (4), providing two symmetrically arranged branch refraction channels below the image tube intensifier (2), and using a 90-degree prism (15) to refract light, an efficient optical transmission path is achieved. Such a layout helps to reduce light loss and ensures that the image finally presented to the user is as clear as possible without distortion.
[0019] This design allows two different types of images (i.e., low-light images and thermal images) to be acquired from the same device, and one can choose to view a single type or the fusion of the two as needed, which greatly enriches the usage scenarios and improves practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is a structural schematic diagram of the present invention;
[0022] Figure 2 It is a schematic diagram of the installation structure of the beam splitting prism (17) and the fusion prism (18) of the present invention.
[0023] Description of reference numerals:
[0024] In the figure: 1. objective lens assembly; 2. image tube intensifier; 3. card connection frame; 4. objective lens fixing seat; 5. eyepiece assembly; 6. eyepiece spacing adjustment bolt; 7. interface; 8. thermal fusion assembly; 9. micro light switch; 10. face shell; 11. thermal fusion switch; 12. battery assembly 13. reflector mounting plate; 14. objective lens group; 15. 90 degree prism; 16. eyepiece lens group; 17. beam splitter prism; 18. fusion prism; 19. display screen; 20. image receiving lens; 21. reflective lens; 22. penetrating lens; 23. CMOS module; 24. fusion prism reflector; 25. base; 26. indicator light. DETAILED DESCRIPTION
[0025] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.
[0026] Unless otherwise defined, the up, down, left, right, front, back, inside and outside directions involved in this document are based on the up, down, left, right, front, back, inside and outside directions in the figures shown in the present invention, and are explained here together.
[0027] This embodiment provides Figure 1 to Figure 2 A low-light thermal imaging dual-light fusion night vision device shown in the figure comprises an objective lens assembly (1), which is responsible for collecting external light and focusing distant scenes into images. It is usually the first-order optical element of the night vision device and has a direct impact on the image quality. An objective lens holder (4) is fixed at the tail end of the objective lens assembly (1), and an image tube intensifier (2) is arranged below the objective lens holder (4). The objective lens assembly (1) is fixed in front of the objective lens holder (4), and the top of the objective lens holder (4) has a clamping frame (3), which is used to fix or connect the objective lens holder (4) to provide the necessary mechanical strength and positioning accuracy. An eyepiece assembly (5) is arranged below and on both sides of the image tube intensifier (2), and the eyepiece assembly (5) finally presents the part to the user's eyes for viewing, amplifies the image transmitted by the system, and enables the observer to clearly see distant objects. The two eyepiece assemblies (5) are movably connected to the outside of the base (25) at opposite ends. A face shell (10) is arranged in front of the base (25). A heat fusion assembly (8) is arranged on the face shell (10). A group of 90-degree prisms (15) are arranged in the objective lens fixing seat (4). An objective lens group (14) is arranged in the objective lens assembly (1). The objective lens group (14) is a key part for performing the light focusing task and determines the performance indicators such as image clarity. The two eyepiece assemblies (5) are each provided with an eyepiece lens group (16), a reflector (21), a field lens (22), and an image receiving lens (20). The image input from the objective lens assembly 1 is refracted to the image tube intensifier (2) through the 90-degree prism (15). The 90-degree prism (15) changes the direction of the light path. The bottom of the base (25) is symmetrically provided with two branch refraction channels arranged opposite to each other. The two branch refraction channels are respectively two eyepiece assemblies (5). The eyepiece assembly (5) directly faces the user's eyes and enables the observer to clearly see the details of distant objects through appropriate magnification.
[0028] In this embodiment, each branch refractive channel has an image receiving lens group (20), and a field lens (22) is arranged between the image receiving lens (20) in each branch refractive channel and the eyepiece lens group (16) in the same branch refractive channel.
[0029] In this embodiment, the field lens (22) is arranged horizontally. The field lens (22) allows light within a specific wavelength range to pass through without being deflected, and is often used to filter out unnecessary spectral components while maintaining image brightness.
[0030] In this embodiment, each field lens (22) has a reflective lens (21) on both the upper and lower sides, and the reflective lens (21) can refract the image refracted from the branch refraction channel into the eyepiece lens group (16) again.
[0031] In this embodiment, a micro-light switch (9) and a thermal fusion switch (11) are respectively arranged on both sides of the thermal fusion component (8), and an interface (7) is arranged on the top outer wall of the thermal fusion component (8). The thermal fusion switch (11) independently controls whether the thermal imaging mode is turned on or off, thereby realizing flexible switching between different working modes.
[0032] In this embodiment, the housing 10 is provided with a battery cartridge assembly (12). The battery cartridge assembly (12) includes a battery cover, a battery, and a positive electrode contact.
[0033] In this embodiment, a reflector mounting plate (13) is mounted on the rear end of each eyepiece assembly (5) by screws, and one end of the reflector lens (21) close to the eyepiece lens group (16) is fixed on the inner wall of the reflector mounting plate (13) at an angle of 45 degrees. The reflector mounting plate (13) provides a stable mounting position for the reflector lens (21) to ensure the correct optical path setting, and the battery barrel assembly (12) is located in front of the face shell (10).
[0034] In this embodiment, the eyepiece assembly (5), the reflector mounting plate (13) and the shell behind the eyepiece assembly (5) enclose a cavity for installing the eyepiece lens group (16), and the components from the field lens (22) downward are all arranged inside the base (25).
[0035] In this embodiment, the bottom end of the image tube intensifier (2) is connected to a beam splitter prism (17), the bottom end of the beam splitter prism (17) is connected to a fusion prism (18), and the bottom end of the fusion prism (18) is provided with a display screen (19).
[0036] In this embodiment, each cavity is connected to the base (25) via an eyepiece distance adjustment bolt (6), and the distance between the two eyepiece assemblies (5) can be adjusted by screwing the eyepiece distance adjustment bolt (6). Thus, the distance between the two eyepiece assemblies (5) is adjustable, which meets the needs of different users and improves comfort. The eyepiece distance adjustment bolt (6) allows the user to adjust the distance between the two eyepiece assemblies (5) to adapt to different pupil distances, thereby improving comfort and visual experience.
[0037] In this embodiment, there are two indicator lights (26), one is a photosensitive lamp, and the other is an infrared lamp. The infrared lamp (infrared fill light function - because it is a low-light night vision device, it is necessary to turn on the infrared fill light in the dark without light). The photosensitive lamp senses the brightness outside. Because the image tube intensifier is afraid of strong light, it is easy to break if there is strong light. Therefore, when the photosensitive lamp senses that the brightness outside is high, it will cut off the power supply to achieve the purpose of protecting the image tube intensifier).
[0038] Working principle:
[0039] The components of the low-light thermal imaging dual-light fusion night vision device work together to ensure that light can be correctly transmitted and finally presented in the eyepiece assembly (5) for the observer to see. The reflector mounting plate (13) ensures the stability and accuracy of the reflector lens (21), thereby maintaining clear image quality.
[0040] The fusion prism (18) and the beam splitter prism (17) convert the optical path. Finally, the user can see the fused image through the eyepiece assembly (5), thereby achieving dual recognition of the target - both the information based on visible light and the information based on heat distribution can be seen.
[0041] The user can use the dim switch (9) and the thermal fusion switch (11) to select different working modes as needed, and the eyepiece distance adjustment bolt (6) allows the user to adjust the distance between the eyepiece components (5) according to personal pupil distance to obtain the best viewing experience.
[0042] The optical path of the micro-light is: from the objective lens group (14), the 90-degree prism (15), the image tube intensifier (2), the beam splitter prism (17), the image receiving lens (20), the reflective lens (21), the field lens (22), the reflective lens (21), to the eyepiece lens group (16), and then to the eyes.
[0043] There is also a light beam: an image tube intensifier (2), a beam splitter prism (17), a fusion prism 18, and a CMOS module (23). The CMOS module (23) collects images and converts them into electrical signals, which are output to the outside through an interface (7).
[0044] Thermal fusion optical path: thermal fusion component (8), display screen (19) (optical path is divided into three beams): (1) through the fusion prism (18), the fusion prism reflector (24), the CMOS module (23), the CMOS module (23) collects the image and converts it into an electrical signal - the electrical signal is output to the outside through the interface (7).
[0045] (2) Left and right lines: passing through a fusion prism (18), a beam splitter prism (17), an image receiving lens (20), a reflective lens (21), a field lens (22), a reflective lens (21), and an eyepiece lens assembly (16) to reach the eye.
[0046] Turn on the low light (thermal fusion is turned off) - the eyes see the scene collected by the objective lens assembly through the eyepiece (at the same time, the CMOS module can collect the scene seen and convert it into signal output).
[0047] Turn on the dim light (turn on thermal fusion) - the eyes see the scene collected by the objective lens assembly through the eyepiece - and also see the scene collected by the thermal fusion assembly (8) (the image collected by the objective lens assembly and the scene collected by the thermal fusion are overlapped together).
[0048] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".
[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A low-light thermal imaging dual-light fusion night vision device, comprising an objective lens assembly (1), characterized in that: An objective lens fixing seat (4) is fixed to the rear end of the objective lens assembly (1), an image tube intensifier (2) is arranged below the objective lens fixing seat (4), a clamping connection frame (3) is provided at the top end of the objective lens fixing seat (4), the image tube intensifier (2) is assembled through a base (25), eyepiece assemblies (5) are arranged below and on both sides of the base (25), and opposite ends of the two eyepiece assemblies (5) are movably connected to the outer side of the image tube base (25); A face shell (10) is arranged in front of the base (25), and a heat fusion component (8) is arranged on the face shell (10). A group of 90-degree prisms (15) are arranged in the objective lens fixing seat (4), and an objective lens group (14) is arranged in the objective lens assembly (1). An eyepiece lens group (16), a field lens (22), a reflection lens (21), and an image receiving lens (20) are arranged in the two eyepiece assemblies (5). The image input from the objective lens assembly (1) is refracted into the image tube intensifier (2) through the 90-degree prism (15). The bottom of the image tube intensifier (2) has two branch refraction channels arranged in opposite directions, and the two branch refraction channels are respectively two eyepiece assemblies (5).
2. The low-light thermal imaging dual-light fusion night vision device according to claim 1, characterized in that: Each of the branch refractive channels has an image receiving lens (20), and a field lens (22) is arranged between the image receiving lens (20) in each of the branch refractive channels and the eyepiece lens group (16) in the same branch refractive channel.
3. The low-light thermal imaging dual-light fusion night vision device according to claim 2, characterized in that: The field lens (22) is arranged horizontally.
4. The low-light thermal imaging dual-light fusion night vision device according to claim 3, characterized in that: Each of the field lens lenses (22) has reflecting lenses (21) on both the upper and lower sides, and the reflecting lenses (21) are capable of refracting the image refracted from the branch refraction channel into the eyepiece lens group (16) again.
5. The low-light thermal imaging dual-light fusion night vision device according to claim 4, characterized in that: A micro-light switch (9) and a thermal fusion switch (11) are respectively arranged on both sides of the thermal fusion component (8), and an interface (7) is arranged on the top outer wall of the thermal fusion component (8).
6. The low-light thermal imaging dual-light fusion night vision device according to claim 5, characterized in that: The face shell (10) is provided with a battery cartridge assembly (12).
7. The low-light thermal imaging dual-light fusion night vision device according to claim 6, characterized in that: A reflector mounting plate (13) is mounted on the rear end of each eyepiece assembly (5) by means of screws, and one end of the reflector lens (21) close to the eyepiece lens group (16) is fixed on the inner wall of the reflector mounting plate (13) at an angle of 45 degrees.
8. The low-light thermal imaging dual-light fusion night vision device according to claim 7, characterized in that: The eyepiece assembly (5), the reflector mounting plate (13) and the shell behind the eyepiece assembly (5) form a cavity for mounting an eyepiece lens group (16).
9. The low-light thermal imaging dual-light fusion night vision device according to claim 8, characterized in that: The bottom end of the image tube intensifier (2) is connected to a beam splitter prism (17), the bottom end of the beam splitter prism (17) is connected to a fusion prism (18), and the bottom end of the fusion prism (18) is provided with a display screen (19).
10. The low-light thermal imaging dual-light fusion night vision device according to claim 8, characterized in that: Each of the cavities is connected to the base (25) via an eyepiece distance adjustment bolt (6), and the distance between the two eyepiece assemblies (5) can be adjusted by screwing the eyepiece distance adjustment bolt (6).