Laser anti-dazzle device and system
Through the cooperation of the F-P interferometer and the detection component, the mirror spacing is adjusted to allow the glare laser to pass through, solving the problem of failure of optical detection equipment caused by laser interference at different wavelengths, and achieving normal detection capabilities in the case of laser interference.
Patent Information
- Application Number
- CN202420499702.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-14
AI Technical Summary
In the prior art, when facing laser interference at different wavelengths, optical detection equipment is prone to failure, and photochromic materials will become devitrified when exposed to laser light, resulting in self-blindness and loss of detection ability.
The F-P interferometer is used to combine the detection component and the controller, and the mirror spacing is adjusted by driving the component to make the glare laser pass through the interferometer, and light of other wavelengths is reflected to form an imaging beam, ensuring the normal operation of the optical detection equipment.
Effectively eliminate laser interference at different wavelengths, maintain the detection capabilities of optical detection equipment, and ensure that it can still work normally under laser interference.
Smart Images
Figure CN222165875U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of optical detection technology, and in particular to a laser anti-glare device and system. Background Art
[0002] In order to suppress the threat posed by optical detection, active or passive means are used in military confrontations, such as passive methods such as camouflage to reduce the perception of optical detection, or actively attacking the enemy's detection equipment. Laser interference is a very important form of active destruction. It irradiates the enemy's optical detection equipment with lasers of a certain wavelength and energy to reduce its detection ability or even make it ineffective. In order to eliminate laser interference, the existing technology proposes solutions of optical coating technology and photochromic materials. Among them, coating technology is generally only for specific wavelengths. When facing lasers of different wavelengths, it lacks the initiative to confront, and it is also easy to cause optical detection equipment to dazzle and fail. The photochromic solution will become opaque when irradiated by laser, that is, self-blindness, and also loses the ability to detect optically. Utility Model Content
[0003] The purpose of the present application is to provide a laser anti-glare device and system, which can eliminate the interference of lasers of different wavelengths, so that the optical detection equipment maintains normal detection capabilities.
[0004] The embodiment of the present application is implemented as follows:
[0005] A laser anti-glare device provided in an embodiment of the present application includes an FP interferometer, a detection component and a controller. The FP interferometer includes a first reflector and a second reflector arranged in parallel and spaced apart, and a drive component for adjusting the distance between the first reflector and the second reflector. The detection component is arranged on the optical path of the FP interferometer to detect incident light. The controller receives a glare-causing laser signal exceeding a light intensity threshold detected by the detection component, processes and calculates it, and outputs a corresponding electrical signal to the drive component. The drive component adjusts the distance between the first reflector and the second reflector according to the electrical signal so that the glare-causing laser passes through the FP interferometer, and the incident light is reflected by the surface of the first reflector to emit an imaging light beam.
[0006] As an optional implementation, it further includes a first beam splitter, the detection component is arranged on the light-transmitting side of the first beam splitter, the incident light passing through the first beam splitter enters the detection component, and the incident light reflected by the first beam splitter emits the imaging light beam.
[0007] As an optional implementation, a second beam splitter is further included, and the detection component is arranged on the light-transmitting side of the second beam splitter, the incident light passing through the second beam splitter enters the detection component, and the incident light reflected by the second beam splitter enters the FP interferometer.
[0008] As an optional implementation, it also includes an imaging lens for increasing the optical field of view, and the imaging light beam enters the human eye or an optical imaging device after passing through the imaging lens.
[0009] As an optional implementation, the driving component adopts an electrostrictive micro-adjusting component or a magnetostrictive micro-adjusting component.
[0010] As an optional embodiment, multiple groups of the FP interferometers are arranged in series, and when the multi-wave dazzling laser is irradiated, each of the FP interferometers is used to process a corresponding wavelength of the dazzling laser. Alternatively, the dazzling laser of the same wavelength is processed multiple times by multiple groups of the FP interferometers.
[0011] As an optional implementation, the optical imaging device includes any one of an image converter, a CMOS image sensor, and a charge coupled device.
[0012] As an optional implementation, the detection component uses a photodiode or a phototransistor.
[0013] As an optional embodiment, the side surfaces of the second reflector and the first reflector that are close to each other are provided with optical reflective surfaces that are parallel to each other; the side surfaces of the first reflector and the second reflector that are away from each other are respectively provided with a first optical anti-reflection surface and a second optical anti-reflection surface; the first optical anti-reflection surface is parallel to the optical reflective surface and has a preset angle with the second optical anti-reflection surface.
[0014] An embodiment of the present application also provides a laser anti-glare system, the above-mentioned laser anti-glare device, information integrated processing system, high-speed servo system and image information processing system; the information integrated processing system inputs and outputs information with external devices through the set port; the high-speed servo system adjusts the FP interferometer through the driving component; the image information processing system is used to process the signal of the imaging light beam to form an optical image.
[0015] The beneficial effects of the embodiments of the present application include:
[0016] The laser anti-glare device provided in the embodiment of the present application includes an FP interferometer and a detection component. The FP interferometer includes a first reflector and a second reflector arranged in parallel and spaced apart, and a driving component is arranged between the first reflector and the second reflector. The detection component of the embodiment of the present application detects the incident light on the optical path of the FP interferometer, calculates and extracts the wavelength of the glare-causing laser in the incident light through the controller provided, and converts it into an electrical signal for controlling the driving component. The driving component adjusts the spacing between the first reflector and the second reflector so that the spacing between the first reflector and the second reflector is a multiple of the wavelength of the glare-causing laser, so that the glare-causing laser can pass through the FP interferometer, and the rest of the incident light is directly reflected by the first reflector to form an imaging light beam. When the embodiment of the present application detects the glare-causing laser through the detection component, the controller generates an electrical signal for controlling the driving component, thereby adjusting and changing the spacing of the FP interferometer to a suitable position to allow the glare-causing laser to pass through, and light of other wavelengths is reflected by the FP interferometer to form an imaging light beam. Therefore, the laser anti-glare device provided in the embodiment of the present application can still maintain normal detection capabilities when facing laser interference.
[0017] The laser anti-glare system provided in the embodiment of the present application includes the above-mentioned laser anti-glare device, an information integrated processing system, a high-speed servo system and an image information processing system; the information integrated processing system inputs and outputs information with external devices through the set ports; the high-speed servo system adjusts the FP interferometer through the driving component; the image information processing system is used to process the signal of the imaging light beam to form an optical image. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 This is one of the optical path schematic diagrams of the laser anti-glare device of the embodiment of the present application;
[0020] Figure 2 This is the second optical path schematic diagram of the laser anti-glare device according to the embodiment of the present application.
[0021] icon:
[0022] 100-FP interferometer; 101-detection component; 102-first reflector; 103-second reflector; 104-driving component; 106-incident light; 107-imaging beam; 108-first spectroscope; 109-first detection light; 110-second spectroscope; 111-second detection light; 112-imaging lens; 113-optical imaging device; 114-optical reflective surface; 115-first optical anti-reflection surface; 116-second optical anti-reflection surface. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0027] In order to suppress the threat posed by optical detection, active or passive means are used in military confrontations, such as passive methods such as camouflage to reduce the perception of optical detection, or actively attacking the enemy's detection equipment. Laser interference is a very important form of active destruction. It irradiates the enemy's optical detection equipment with lasers of a certain wavelength and energy to reduce its detection ability or even make it ineffective. In order to eliminate laser interference, the existing technology proposes solutions of optical coating technology and photochromic materials. Among them, coating technology is generally only for specific wavelengths. When facing lasers of different wavelengths, it lacks the initiative to confront, and it is also easy to cause optical detection equipment to dazzle and fail. The photochromic solution will become opaque when irradiated by laser, that is, self-blindness, and also loses the ability to detect optically.
[0028] In order to solve the above technical problems, the embodiments of the present application provide a laser anti-glare device and system.
[0029] Reference Figure 1 and Figure 2 As shown, a laser anti-glare device provided by an embodiment of the present application includes an FP interferometer 100, a detection component 101 and a controller. The FP interferometer 100 includes a first reflector 102 and a second reflector 103 arranged in parallel and spaced apart, and a driving component 104 for adjusting the distance between the first reflector 102 and the second reflector 103; the detection component 101 is arranged on the optical path of the FP interferometer 100 to detect incident light 106. The controller receives a dazzling laser signal exceeding a light intensity threshold detected by the detection component 101, processes and calculates, and outputs a corresponding electrical signal to the driving component 104. The driving component 104 adjusts the distance between the first reflector 102 and the second reflector 103 according to the electrical signal, so that the dazzling laser can pass through the FP interferometer 100, and the incident light 106 (excluding the dazzling laser) is reflected on the surface of the first reflector 102 and then emits an imaging light beam 107.
[0030] It should be noted that the laser anti-glare device provided in the embodiment of the present application can be installed on an optical detection device to counteract and eliminate the opponent's laser interference.
[0031] The working band of the FP interferometer 100 covers the ultraviolet, visible light and infrared regions.
[0032] In the embodiment of the present application, light in the object space is reflected by the FP interferometer 100 and enters the optical detection device. When encountering laser interference from the other party during the optical detection process, when the photoelectric signal intensity on the detection component 101 exceeds a certain threshold, the driving component 104 on the FP interferometer 100 will change the spacing of the FP interferometer 100. When the spacing of the FP interferometer 100 satisfies the constructive interference of the laser, the laser passes through the FP interferometer 100, and the photoelectric signal on the detection component 101 will be at the lowest value, while light of other wavelengths is reflected into the optical detection device basically without interference, thereby realizing laser anti-glare.
[0033] It should be noted that the intensity of the interfering dazzling laser is greater than the reflected light formed by diffuse reflection. Therefore, when encountering laser interference during the optical detection process, the photoelectric signal intensity on the detection component 101 exceeds a certain threshold, that is, it is judged that the dazzling laser is detected. The signal intensity of the detection component 101 can be set by those skilled in the art according to specific needs. For example, it can be 1mW / mm 2 .
[0034] The laser anti-glare device provided in the embodiment of the present application includes an FP interferometer 100 and a detection component 101. The FP interferometer 100 includes a first reflector 102 and a second reflector 103 arranged in parallel and spaced apart, and a driving component 104 is arranged between the first reflector 102 and the second reflector 103. The detection component 101 in the embodiment of the present application detects the incident light 106 on the optical path of the FP interferometer 100, calculates and extracts the wavelength of the glare-causing laser in the incident light 106 through a set controller, and converts it into an electrical signal for controlling the driving component 104. The driving component 104 adjusts the distance between the first reflector 102 and the second reflector 103 so that the distance between the first reflector 102 and the second reflector 103 is a multiple of the wavelength of the glare-causing laser, thereby allowing the glare-causing laser to pass through the FP interferometer 100.
[0035] When the glare-causing laser is detected by the detection component 101 in the embodiment of the present application, the controller generates an electrical signal to control the driving component 104, thereby adjusting and changing the spacing of the FP interferometer 100 to a suitable position to allow the glare-causing laser to pass through, and light of other wavelengths is reflected by the FP interferometer 100 to form imaging light. Therefore, the laser anti-glare device provided in the embodiment of the present application can still maintain normal detection capabilities when facing laser interference.
[0036] Reference Figure 1 As shown, as an optional embodiment, it also includes a first beam splitter 108, and the detection component 101 is arranged on the light-transmitting side of the first beam splitter 108. The incident light 106 is emitted through the FP interferometer 100 and transmits the first beam splitter 108 to form a first detection light 109 that enters the detection component 101.
[0037] Furthermore, the embodiment of the present application also includes a first beam splitter 108 .
[0038] It should be noted that the incident light 106 is emitted through the FP interferometer 100 and reaches the first beam splitter 108 , wherein the detection component 101 is disposed on the light-transmitting side of the first beam splitter 108 , so the incident light 106 transmits the first beam splitter 108 and enters the detection component 101 .
[0039] The optical imaging device 113 or the human eye may be located on the reflective side of the first beam splitter 108 , and the incident light 106 is reflected by the first beam splitter 108 and enters the human eye or the optical imaging device 113 .
[0040] Reference Figure 2 As shown, as an optional embodiment, it also includes a second beam splitter 110, the detection component 101 is arranged on the light-transmitting side of the second beam splitter 110, the incident light 106 transmits the second beam splitter 110, and forms a second detection light 111 that enters the detection component 101; the FP interferometer 100 is arranged on the light-reflecting side of the second beam splitter 110, and the reflected light on the second reflector 103 is incident on the FP interferometer 100.
[0041] Different from the above-mentioned embodiments, in the embodiments of the present application, the incident light 106 directly transmits the second beam splitter 110 and enters the detection assembly 101 . The incident light 106 is reflected on the surface of the second beam splitter 110 and enters the FP interferometer 100 , and enters the human eye or the optical imaging device 113 through the FP interferometer 100 .
[0042] It should be noted that both the first beam splitter 108 and the second beam splitter 110 are beam splitters with relatively small transmittance and reflection, which means that the intensity of the light incident on the detection component 101 is much smaller than the imaging light.
[0043] The specific transmission-reflection ratio of the beam splitter can be set by those skilled in the art as required, and no special limitation is imposed on this.
[0044] Exemplarily, the reflectivity of the first beam splitter 108 and the second beam splitter 110 may be greater than 99%.
[0045] It should be noted that the first beam splitter 108 and the second beam splitter 110 may also be replaced by a third reflector with a high-reflection film.
[0046] Exemplarily, the incident light 106 enters the imaging lens 112 and is emitted to the third reflector. A small amount of light passes through the third reflector and enters the detection component 101 , and most of the light is reflected by the high-reflection film to the FP interferometer 100 .
[0047] As an optional implementation, an imaging lens 112 for increasing the optical field of view is further included. The imaging light beam 107 enters the human eye or an optical imaging device 113 after passing through the imaging lens 112 .
[0048] It should be noted that the imaging lens 112 is used to shape the incident light 106 to increase the optical field angle, and the number and position of the imaging lens 112 can be set by those skilled in the art as needed, and there is no special limitation on this.
[0049] As an optional implementation, the driving component 104 uses an electrostrictive micro-adjusting component or a magnetostrictive micro-adjusting component.
[0050] It should be noted that the electrostrictive micro-adjustment component or the magnetostrictive micro-adjustment component can provide a spacing adjustment capability of not less than 20 microns, and the driving response rate is in the nanosecond level.
[0051] Among them, the electrostrictive micro-adjustment component is a micron or even nanometer-level smart material component that uses the electrostrictive effect for precise displacement adjustment. The electrostrictive effect refers to the phenomenon that certain materials change in volume under the action of an external electric field. When a voltage is applied across the material, the ion distribution inside the material changes, causing the shape and size to change accordingly, thereby producing mechanical deformation.
[0052] It is usually made of piezoelectric ceramic materials and has the characteristics of fast response speed, high precision and good stability. It is widely used in many fields such as micro-electromechanical systems, precision positioning, optical focusing, acoustic transducers, biomedical equipment, etc.
[0053] As an optional implementation, the FP interferometer 100 includes a plurality of groups, and the plurality of groups of FP interferometers 100 are arranged in series. When a multi-wave dazzling laser is irradiated, each FP interferometer 100 is used to process a corresponding wavelength of the dazzling laser.
[0054] It should be noted that the FP interferometer 100 includes multiple groups, and the multiple groups of FP interferometers 100 are arranged in series. When multiple beams of dazzling lasers with different wavelengths simultaneously irradiate the interference optical detection equipment, the controller controls each group of FP interferometers 100 to process one of the dazzling lasers to improve the laser anti-glare effect and the working effect for multi-wavelength lasers.
[0055] Different from the above-mentioned embodiment, multiple groups of FP interferometers 100 can be used to perform multiple attenuation treatments on the dazzling laser of the same wavelength as needed, which is beneficial to improving the imaging quality of the imaging light beam.
[0056] As an optional implementation, the optical imaging device 113 includes any one of an image converter, a CMOS image sensor, and a charge coupled device.
[0057] As an optional implementation, the detection component 101 uses a photodiode or a phototransistor.
[0058] As an optional embodiment, the side surfaces of the second reflector 103 and the first reflector 102 that are close to each other are provided with optical reflective surfaces 114 that are parallel to each other; the side surfaces of the first reflector 102 and the second reflector 103 that are away from each other are respectively provided with a first optical anti-reflection surface 115 and a second optical anti-reflection surface 116; the first optical anti-reflection surface 115 is parallel to the optical reflective surface 114, and has a preset angle with the second optical anti-reflection surface 116.
[0059] The first optical anti-reflection surface 115 and the second optical anti-reflection surface 116 of the embodiment of the present application have a preset angle, so that the second reflector 103 is designed with a wedge angle, so that the dazzling laser will not be reflected back for interference after passing through.
[0060] It should be noted that, in the absence of interference, the incident light 106 is a light of narrow wavelength, and the energy passing through the FP interferometer 100 is very small, so the optical loss of the FP interferometer 100 will not affect the optical imaging.
[0061] The embodiment of the present application also provides a laser anti-glare system, including the above-mentioned laser anti-glare device, an information integrated processing system, a high-speed servo system and an image information processing system; the information integrated processing system inputs and outputs information with external devices through the set ports; the high-speed servo system adjusts the FP interferometer 100 through the driving component 104; the image information processing system is used to process the signal of the imaging beam 107 to form an optical image.
[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A laser anti-glare device, characterized in that: The invention comprises an FP interferometer, a detection component and a controller. The FP interferometer comprises a first reflector and a second reflector which are arranged in parallel and spaced apart, and a driving component for adjusting the distance between the first reflector and the second reflector. The detection component is arranged on the optical path of the FP interferometer and is used to detect incident light. The controller receives a dazzling laser signal exceeding a light intensity threshold detected by the detection component, processes and calculates it, and outputs a corresponding electrical signal to the driving component. The driving component adjusts the distance between the first reflector and the second reflector according to the electrical signal, so that the dazzling laser passes through the FP interferometer, and the incident light is reflected by the surface of the first reflector to emit an imaging light beam.
2. The laser anti-glare device according to claim 1, characterized in that: It also includes a first beam splitter, the detection component is arranged on the light-transmitting side of the first beam splitter, the incident light passing through the first beam splitter enters the detection component, and the incident light reflected by the first beam splitter emits the imaging light beam.
3. The laser anti-glare device according to claim 1, characterized in that: It also includes a second beam splitter, the detection component is arranged on the light-transmitting side of the second beam splitter, the incident light passing through the second beam splitter enters the detection component, and the incident light reflected by the second beam splitter enters the FP interferometer.
4. The laser anti-glare device according to any one of claims 1 to 3, characterized in that: It also includes an imaging lens for increasing the optical field of view, and the imaging light beam enters the human eye or an optical imaging device after passing through the imaging lens.
5. The laser anti-glare device according to any one of claims 1 to 3, characterized in that: The driving component adopts an electrostrictive micro-adjusting component or a magnetostrictive micro-adjusting component.
6. The laser anti-glare device according to any one of claims 1 to 3, characterized in that: It comprises a plurality of groups of FP interferometers arranged in series. When a multi-wave dazzling laser is irradiated, each of the FP interferometers is used to process a corresponding wavelength of dazzling laser; or, the dazzling laser of the same wavelength is processed multiple times by the plurality of groups of FP interferometers.
7. The laser anti-glare device according to claim 4, characterized in that: The optical imaging device includes any one of an image converter, a CMOS image sensor, and a charge coupled device.
8. The laser anti-glare device according to any one of claims 1 to 3, characterized in that: The detection component adopts a photodiode or a phototransistor.
9. The laser anti-glare device according to any one of claims 1 to 3, characterized in that: The side surfaces of the second reflector and the first reflector that are close to each other are provided with mutually parallel optical reflective surfaces; the side surfaces of the first reflector and the second reflector that are away from each other are respectively provided with a first optical anti-reflection surface and a second optical anti-reflection surface; the first optical anti-reflection surface is parallel to the optical reflective surface and has a preset angle with the second optical anti-reflection surface.
10. A laser anti-glare system, characterized in that: It comprises the laser anti-glare device according to any one of claims 1 to 9, an information integrated processing system, a high-speed servo system and an image information processing system; the information integrated processing system inputs and outputs information with external devices via a set port; the high-speed servo system adjusts the FP interferometer via a driving component; the image information processing system is used to process the signal of the imaging light beam to form an optical image.