A combined optical detection and laser focusing device

Abstract

The application discloses a combined device of optical detection and laser convergence, comprising a workbench which can be driven to rotate in horizontal and pitching directions, a detection assembly for scanning the airspace in the field of view, detecting the target and acquiring the coordinate information of the target, and at least one laser emission channel which is arranged in a circumferential distribution; each laser emission channel comprises a laser light source, a first optical deflection element located downstream of the light path of the light source, and a second optical deflection element located between the light source and the first optical deflection element; the application further comprises a control system which is in communication connection with the detection assembly and the driving components of each laser emission channel. The control system independently and cooperatively controls the deflection angles of the two optical deflection elements of each channel based on the target coordinate information, so that the n laser beams emitted by the n laser emission channels realize spatial convergence at the target position in the far field. The device has flexible convergence response and high precision, and is suitable for optical application scenarios which require the cooperative action of multiple laser beams.

Description

Technical Field

[0001] This invention relates to a combined device for optical detection and laser focusing, belonging to the field of optical detection technology. Background Technology

[0002] High-energy laser systems have broad application prospects in fields such as long-range detection, precision strikes, and space debris removal. The core effectiveness of such systems depends on two key capabilities: first, the ability to quickly detect and accurately track long-range, high-speed moving targets; and second, the ability to efficiently and accurately focus high-energy laser beams onto the target point and achieve continuous energy delivery.

[0003] Currently, the mainstream technical solutions for achieving laser beam aiming and focusing mainly rely on the following two approaches: 1. Aiming system based on integral mechanical steering Such systems directly drive the entire laser emitting device (including the heavy laser, optical platform, and supporting structure) to rotate in azimuth and pitch using precision servo mechanisms, thereby pointing the beam at the target. This approach has inherent technical limitations: Slow response speed and large inertia: Due to the large mass and inertia required for driving, the system cannot achieve rapid acceleration and braking, which severely limits the response speed of aiming and tracking, making it difficult to deal with multiple targets that appear suddenly or at high speed.

[0004] The contradiction between control precision and stability: To achieve precise pointing over long distances, extremely high mechanical structural rigidity and servo control precision are required, which often leads to further cumbersome systems, contradicting the need for rapid response.

[0005] Low efficiency in single-target engagement: Its massive mechanical structure makes it impossible to quickly switch between targets in different directions in a short period of time, making it difficult to achieve continuous and rapid engagement of multiple targets.

[0006] 2. Laser focusing system based on traditional optical beam combining To increase the laser power applied to the target, a common approach is to increase the laser power, transmit it through a higher-power transmitter, and then use a telescope or focusing system to direct it towards the target. This method has the following significant drawbacks: The system is complex and costly: it requires precise and complex optical components and assembly processes, which not only increases the size, weight and cost of the system, but also introduces additional challenges in light energy loss and thermal management.

[0007] Unable to achieve dynamic focusing: Fixed beam combining and focusing optical systems typically only perform optimally within a specific depth of focus. For targets at different distances, the system cannot adjust the beam convergence point rapidly in real time, resulting in a significant decrease in energy density and a substantial reduction in strike effectiveness.

[0008] Poor flexibility: It requires a dynamic dimming device in the external optical path to change the direction of the laser beam, such as MENS micromirror reflection, but it cannot control the beam of each micromirror to point to different targets, thus losing the ability to deal with multiple threats at the same time.

[0009] The dynamic range is small, the deflection angle of typical micromirrors is very small, and the reflective surface is easily burned by laser.

[0010] In summary, existing technologies struggle to simultaneously achieve wide-area rapid search, rapid switching and aiming across multiple targets, dynamic focusing on targets at different distances, and lightweight and low-cost system structures. In particular, achieving microsecond-level precise deflection of laser beams without moving bulky mechanical structures, and automatically converging multiple laser beams at target points at arbitrary distances without using complex beam-combining optical components, remain critical technical challenges in this field.

[0011] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0012] The purpose of this invention is to provide an optical scanning device for performing full-area (overhead) scanning detection with higher real-time requirements, thereby overcoming the defects in the prior art.

[0013] A combined optical detection and laser focusing device, comprising: A work stand that can be driven to rotate in at least the horizontal and pitch directions; A detection component, mounted on a work stand and configured to scan the airspace within its field of view to detect at least one target and acquire its coordinate information; At least one laser emitting channel is circumferentially distributed and mounted on the work stand; each laser emitting channel includes: A laser source; A first optical deflection element is located downstream of the optical path of the laser source and is configured to rotate at high speed about a first axis or to cause the beam emitted by the second optical deflection element to be deflected horizontally or vertically, for applying a first deflection to the beam from the second optical deflection element. A second optical deflecting element is located between the first optical deflecting element and the laser source and is configured to rotate at high speed about a second axis or to deflect the incident laser beam vertically or horizontally, for applying a second deflection to the beam from the laser source. A control system is communicatively connected to the detection components and the drive components of each laser emission channel; The control system is configured to: independently and collaboratively control the rotation angle of the first optical deflection element and the second optical deflection element in each laser emission channel based on the target coordinate information obtained by the detection component, so that the n laser beams emitted from the n laser emission channels achieve spatial convergence at the far-field target position, where n is an integer greater than 1.

[0014] More preferably, the first optical deflecting element is a wedge-shaped light-transmitting mirror, and the second optical deflecting element is a wedge-shaped reflector, or the first optical deflecting element and the second optical deflecting element are reflectors with their deflection axes perpendicular to each other.

[0015] Further preferably, the wedge angle α1 of the wedge-shaped transmission mirror and the wedge angle α of the wedge-shaped reflector achieve scanning of a circular region within the range of ±2*α, where α=α1. The maximum deflection angle of the output beam of the first deflecting reflector, ±2*α1, and the maximum deflection angle of the output beam of the second deflecting reflector, ±2*α, achieve scanning of regions within the horizontal and vertical ranges of (±2*α1) and (±2*α), respectively, where α=α1. Where α and α1 are between 0.2° and 10°.

[0016] More preferably, the work frame includes an upper mounting platform and a lower mounting platform arranged at a fixed angle in space; the detection component is installed in the central area of ​​the upper mounting platform; the second optical deflection element of each laser emission channel is installed on the upper mounting platform and distributed around the detection component; the first optical deflection element and the laser source of each laser emission channel are correspondingly installed on the lower mounting platform.

[0017] More preferably, the fixed angle γ between the upper mounting platform and the lower mounting platform is between 30° and 60°.

[0018] More preferably, the included angle γ is fixed at 45°.

[0019] More preferably, the detection component includes a laser scanning detection module, which includes a detection light source for emitting a scanning beam, a pair of rotating scanning prisms for deflecting the scanning beam twice to form a scanning trajectory or a pair of deflecting mirrors for deflecting the scanning beam twice to form horizontal and vertical scanning lines, and a receiving optical system and detector for receiving the target reflected echo.

[0020] Further preferably, the pair of rotating scanning prisms includes a wedge-shaped transmission mirror-3 and a wedge-shaped reflector-3, both with wedge angles approximately 1 / 4 of the full field of view of the detection component, 2*β, where β is (0.5°-20°). The pair of deflecting mirrors includes two deflecting mirrors-3 and a deflecting mirror-4 that deflect around their respective deflection axes. The two deflection axes are spatially perpendicular to each other, each forming a field of view with a maximum ±β deflection angle of the output beam.

[0021] More preferably, the scanning trajectory of the scanning beam emitted by the laser scanning detection module is a rose line, or a horizontal scanning line, or a vertical scanning line.

[0022] More preferably, the detection component is an active + passive optical detection system, selected from a combination of optical rangefinders, laser scanning radars and imaging devices in the infrared or visible light bands to simultaneously detect and locate targets within the field of view.

[0023] Further preferably, the detection component is an electromagnetic wave detection system, which is a phased array radar to simultaneously achieve a large detection field of view and multi-target positioning.

[0024] More preferably, each of the laser emission channels further includes a first encoder for detecting the rotation angle of the first optical deflection element and a second encoder for detecting the rotation angle of the second optical deflection element.

[0025] More preferably, the rotation of the workpiece is driven by a set of azimuth and pitch macro actuators, and the rotation of the first optical deflection element and the second optical deflection element is driven by corresponding micro actuators; the micro actuators have a higher angular velocity response capability than the macro actuators.

[0026] More preferably, the control system employs a coarse-fine composite tracking strategy: the macro actuator drives the workpiece for coarse tracking, so that the target enters and remains within the field of view of the detection component; the micro actuator drives the first and second optical deflection elements for aiming.

[0027] More preferably, the lasers emitted by each of the laser emission channels have the same wavelength, thereby converging lasers of the same wavelength at the target.

[0028] More preferably, each of the laser emission channels emits a different laser wavelength, thereby converging lasers of different wavelengths at the target.

[0029] Furthermore, the control system is further configured as follows: Receive coordinate information of at least two targets; First, the laser beams from each of the laser emission channels are controlled to converge onto the first target; Subsequently, without moving the work stand, all beams are controlled to turn from the first target position and reconverge to the second target position by rapidly changing the angles of the first and second optical deflection elements in each channel.

[0030] or, The laser beam from the laser emission channel described in the control section is focused onto the first target; Control the laser beam from another part of the laser emission channel to converge onto the second target; Subsequently, without moving the work stand, by rapidly changing the angles of the first and second optical deflection elements in each channel, all beams are controlled to turn from the first target position and reconverge to the second target position, all beams are controlled to turn from the second target position and reconverge to the first target position, and all beams are controlled to turn from the first target position or the second target position and converge to the third target position.

[0031] Furthermore, for targets at different distances, the control system calculates and sets different combinations of deflection angles for each channel, enabling all beams to achieve dynamic focusing at the target distance.

[0032] A method for multi-target laser strike based on any of the combined devices described above includes the following steps: S100: Drive the work frame to bring the target area into the field of view of the detection component; S200: The target area is scanned by the detection component to identify and obtain the precise spatial coordinates of at least two targets; S300: Based on the coordinates of the first target, calculate and control the optical deflection elements of all laser emission channels to operate synchronously, so that all or part of the laser beams converge on the first target; S400: After completing the preset irradiation of the first target, according to the coordinates of the second target, quickly adjust the angle of the optical deflection elements of all laser emission channels so that all or part of the laser beams turn and converge on the second target.

[0033] More preferably, in steps S300 and S400, for each target, the control system independently calculates a unique set of target angles between the first optical deflection element and the second optical deflection element for each laser emission channel based on its distance, so as to achieve precise spatial matching of the beam at the target.

[0034] Technical advantages: High-speed target detection: The working frame drives the detection unit to align with the approximate location of the target, and the detection unit itself completes the rapid detection of the target with precise positioning within the field of view. At this time, there is no need to deflect the heavy and bulky frame, thus achieving high speed and high precision in target detection.

[0035] High-speed laser control: Laser control is achieved by using two small and lightweight wedge-shaped lenses and wedge-shaped reflectors for deflection and reflection, or by using two adjustable reflectors for deflection, without having to deflect the entire frame to achieve laser aiming, thus realizing high-speed laser control.

[0036] High laser power: Multiple laser beams are aimed at the target through different deflection angles and converged at the target location to achieve high-power laser focusing at the target position.

[0037] No converging lens required: Multiple laser beams are converged at the target location using a deflector, eliminating the need for an optical lens to converge the laser, thus reducing design and manufacturing costs and lightening the weight of the device.

[0038] Achieving dynamic laser focusing: For targets at different distances, the direction of each beam is controlled separately, so that all beams converge at the same point on the target, thus achieving dynamic laser focusing.

[0039] Furthermore, compared to MENS micromirror deflection, the beam does not generate additional power loss during deflection.

[0040] The laser can quickly switch between different wavelengths to adapt to different weather conditions and sudden changes in the environment.

[0041] The high speed of target detection and the high speed of laser focusing make it suitable for simultaneous detection of multiple targets and high-speed laser irradiation of multiple targets. Attached Figure Description

[0042] Figures 1a to 1d This diagram illustrates the combination of different work frames and orientation actuators. Figure 1c and Figure 1d This is a schematic diagram of a double-layer work rack; Figure 2 This is a schematic diagram showing the mating relationship between the upper mounting plate and the lower mounting plate; Figure 3a This is a schematic diagram of the rotary actuator-1. Figure 3b A schematic diagram of the rotary actuator-2; Figure 3c A schematic diagram showing the combination of a wedge-shaped reflector and a wedge-shaped lens; Figure 3d This is a schematic diagram of a rectangular detection area; Figure 4a A schematic diagram showing the scanning trajectory of the detection unit as a rose line; Figure 4b A schematic diagram showing whether the scanning trajectory of the detection unit is a horizontal or vertical scanning line; Figure 5 , Figure 6 , Figure 7 This is a diagram illustrating multi-target engagement. Detailed Implementation

[0043] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0044] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0045] This invention provides an optical detection and laser emission combination device and method for rapid search, aiming, and laser energy focusing of multiple targets at long distances. The core design concept of this device is: adopting a two-stage "macro-micro" motion and an integrated "detection-emission" architecture, achieving broad spatial coverage through large-inertia frame motion, and achieving microsecond-level precise beam orientation and multi-beam spatial synthesis through small-inertia optical deflection elements, ultimately realizing a rapid, continuous, and precise multi-target strike capability. Example 1

[0046] like Figures 1a to 1d As shown, this embodiment provides a specific implementation method for the device.

[0047] The core mechanical support structure of the device is a rigid working frame. The working frame is mounted on a fixed base via bearings and other structures. Its drive system includes an azimuth actuator and a pitch actuator, which can be mounted on an external fixed frame or an internal frame. This macro-drive system can drive the entire working frame to complete continuous horizontal rotation and vertical pitch yaw, thereby achieving initial coverage of the upper hemisphere airspace. The macro-drive system has a relatively low angular velocity but a high load-bearing capacity, responsible for pointing over a large area of ​​airspace.

[0048] The internal structure of the work stand employs a double-layer design, with an upper mounting plate and a lower mounting plate fixedly installed. These two plates are not parallel but rather form a fixed mounting angle. This angle is an optimized design value, preferably 45°. This tilted design provides the necessary physical space and optical path deflection space for the arrangement of optical components on both layers, allowing laser light emitted from the lower layer to pass unobstructed through the upper layer components and exit, while simultaneously ensuring that the detection line of the upper layer is not interfered with by the lower layer components.

[0049] The detection unit is mounted at the center through-hole of the upper mounting plate. Its core function is to rapidly scan the airspace within its field of view, accurately detect, identify, and lock onto targets, and measure the target's distance, azimuth, and elevation angles with high precision. The detection unit can be implemented in several ways: Option 1 (Mature Solution): The detection unit can be a staring or small-range scanning photoelectric detection system with integrated optical ranging capabilities, such as a detection camera consisting of a high-sensitivity detector and one or more optical lens groups. It performs imaging and positioning by receiving natural light or cooperative beacon light reflected from the target.

[0050] Method 2 (Preferred Embodiment): As shown in Figure 4, the detection unit is a dedicated active laser scanning detection component. This component includes a wedge-shaped reflector-3 mounted on an upper mounting plate and a wedge-shaped transparent mirror-3 mounted on a lower mounting plate, both with wedge angles equal to half the field of view. A beam emitted from a narrow-linewidth, low-power detection laser passes sequentially through the rotating wedge-shaped transparent mirror-3 and wedge-shaped reflector-3, forming a complex scanning trajectory in external space, such as a rosette trajectory with a maximum coverage angle. When the scanning spot illuminates the target, part of its reflected light returns along the original path, passing sequentially through the wedge-shaped reflector-3 and wedge-shaped transparent mirror-3, and finally converged onto a high-sensitivity detector-3 by a receiving lens group-3. By recording the real-time rotation angles of the two wedge mirrors and the laser flight time, the high-precision three-dimensional coordinates of the target can be calculated in real time. This method has the advantages of active detection, high accuracy, and strong anti-interference capability.

[0051] Method 3: The detection unit can also be a miniaturized, high-precision electromagnetic wave radar, such as a millimeter-wave radar, which is suitable for target detection under complex weather conditions.

[0052] To achieve rapid and precise laser aiming and multi-beam spatial power synthesis, this device adopts a distributed, multi-channel, micro-driven design.

[0053] On the upper mounting plate, at least two fast-rotating units-1 are evenly distributed on the same circumference around the central through-hole of the detection unit. The specific structure of each fast-rotating unit-1 is as follows: Figure 3a As shown, its core is a wedge-shaped reflector with a wedge angle of α. This wedge-shaped reflector is driven by a high-dynamic-response rotary actuator-1, which can rotate about its optical axis at a very high angular velocity. Simultaneously, it is equipped with a high-precision encoder-1 for real-time feedback of the precise angular position of the wedge-shaped reflector.

[0054] On the lower mounting plate, corresponding one-to-one with the upper-layer fast spinning unit-1, there are also the same number of fast spinning units-2 evenly distributed. The specific structure of each fast spinning unit-2 is as follows: Figure 3b As shown, its core is a wedge-shaped lens with the same wedge angle α. This wedge-shaped lens is driven to rotate by another high-dynamic-response rotary actuator-2 and is equipped with an encoder-2 for real-time angle feedback.

[0055] A high-power laser is fixedly installed directly below each fast-spinning unit-2. Each laser, its corresponding fast-spinning unit-2, and fast-spinning unit-1 together constitute an independent laser emission channel.

[0056] Laser aiming and focusing principle: such as Figure 3c As shown, the operation of a single laser emission channel is as follows: The collimated laser beam emitted by the laser is first incident perpendicularly onto the lower wedge-shaped lens. Due to the wedge angle of the prism, the beam exits with a fixed deflection angle, the direction of which depends on the circumferential rotation angle of the wedge-shaped lens. The deflected beam continues upward and is incident on the reflecting surface of the upper wedge-shaped mirror. After reflection, the beam changes direction again, and its final exit direction is determined by the rotation angle of the wedge-shaped mirror. By coordinating the control of the two rotation angles, the direction of the final exit beam can be arbitrarily and rapidly changed within a cone with a vertex angle of 4α. Figure 3c This illustration shows how the beam exit point scans along a circle by fixing one angle and changing the other. In reality, by independently controlling the two angles, full coverage scanning within the cone can be achieved. The beams from all channels, through their independent deflection angle control, can achieve spatial convergence at the same point in the far field, with the total intensity approximately equal to the algebraic sum of the intensities of each beam, thus achieving power combining.

[0057] To ensure system effectiveness, the design must meet the following requirement: the field of view of the detection unit should be at least greater than or equal to the maximum aiming range of a single laser channel. This way, as long as the target is locked near the center of the field of view by the detection unit, all laser beams can be immediately converged on the target through rapid adjustment by the fast-rotating unit.

[0058] Control system and workflow: The control system of this device adopts a hierarchical control strategy that combines "coarse tracking" and "fine tracking".

[0059] Coarse tracking: Based on mission planning or preliminary warning information, the control system drives the azimuth and pitch macro actuators to move the entire gantry at a relatively low angular velocity, roughly aligning the field of view of the detection unit with the airspace to be detected. This process is mainly used to overcome large inertia and achieve wide-range pointing.

[0060] Fine tracking and aiming: After coarse tracking brings the target into the detection field of view, fine tracking is mainly completed by the detection unit itself, which outputs the precise coordinate deviation of the target in real time. For laser aiming, the control system calculates the target angle of the wedge-shaped transmission mirror and wedge-shaped reflection mirror required for each laser channel at an extremely high frequency based on the target coordinates. Then, it drives the high-speed rotary driver-2 and rotary driver-1 to drive the miniaturized wedge mirror to respond quickly, realizing precise and fast closed-loop control of the laser beam direction.

[0061] Combination Figure 5The device's continuous strike operation against multiple targets within a region is as follows: S1: Area Search. The control system commands the macro drive system to rotate the work platform to the direction of the threat or the airspace to be inspected.

[0062] S2: Target Detection and Locking. The detection unit is activated, and its wedge mirror rotates according to a specific pattern, causing the detection laser to perform a rosette scan within the field of view. Once a target is detected, the reflected echo is received by detector-3, and the system immediately calculates the target's precise coordinates. Subsequently, the scan can continue or switch to a tracking mode for the detected target, and subsequent targets can be detected and their coordinates recorded.

[0063] S3: First Target Strike. Based on the coordinates of the first target, the control system instantly calculates the required deflection angle combination for each laser channel. Then, all fast-rotating units-2 and-1 synchronously rotate at high speed to the designated angle. Multiple high-energy laser beams are emitted at slightly different angles, precisely converging at the first target location, causing damage effects such as high-temperature ablation. This process achieves "dynamic focusing," eliminating the need for mechanically moving the heavy focusing lens assembly.

[0064] S4: Second Target Strike. After completing the predetermined irradiation of the first target or determining its failure, the system immediately recalculates and issues a new angle command based on the stored coordinates of the second target. All fast-rotating units deflect rapidly again, causing the multi-beam lasers to turn from the first target position to the second target position in a very short time, achieving rapid and continuous multi-target strike. Example 2

[0065] Based on Example 1, this example further defines the characteristics of the lasers. All lasers can emit the same wavelength, in which case the convergence at the target is a simple incoherent power superposition. Alternatively, lasers can emit different but similar wavelengths. In this case, a spectral combiner can be added to the internal optical path or before the output port to first synthesize the spectra of multiple lasers before they enter their respective deflection paths, thus further improving the output power density of a single channel. Example 3

[0066] Building upon Example 1, this example emphasizes another advantage of the control system. For targets at different distances, the angles between the beams need to be different to achieve perfect convergence of multiple laser beams at the target point. Traditional fixed-baseline multi-emission systems struggle to adapt to variable-distance focusing. However, in this invention, the control system can accurately calculate the angles between the beams of each channel required to achieve convergence at that distance based on the target distance, and then deduce the unique deflection angle combination for each channel. This means that this invention can not only synthesize a beam at the same distance, but also dynamically adjust the "focal point" position of the synthesized beam in real time for targets at any distance, achieving true full-dynamic focusing and greatly improving the system's adaptability and strike efficiency.

[0067] The beneficial effects are summarized as follows:

[0068] In summary, the apparatus and method provided by the embodiments of the present invention have the following significant advantages: High detection and response speed: The system separates large-scale scanning from precise tracking. Large-scale searching is accomplished by relatively low-speed macro-drive, while precise tracking and aiming are achieved by scanning within the detection unit and using ultra-fast micro-drive wedge mirrors, greatly reducing system inertial delay.

[0069] Extremely high aiming accuracy and speed: The beam is deflected by a small wedge mirror that rotates at high speed. Its moment of inertia is extremely small, which can achieve microsecond-level pointing adjustment and stabilization. The tracking bandwidth is much higher than that of traditional reflector mount systems.

[0070] Multi-target continuous strike capability: By reallocating the direction of each beam through software, the target can be switched between different targets within milliseconds or even microseconds. It can also simultaneously focus the laser on multiple targets for separate strikes without waiting for the movement and reset of mechanical devices.

[0071] At the same time, a single device can be configured with two different wavelengths of laser to adapt to different environmental conditions and reduce the adverse effects of environmental rain, fog, and dust on the interception effect.

[0072] High-power convergence and simplified structure: Employing multi-beam spatial direct combining technology, the total power is the sum of the powers of each beam or a portion of the beams, avoiding complex, expensive, and power-capacity-limited optical beam combiners. Simultaneously, it eliminates the need for large, heavy, and slow-focusing transmissive focusing lens groups required for long-distance focusing.

[0073] At the same time, the laser power of each unit is relatively low, which allows the use of optical devices with lower power thresholds, thus reducing equipment costs.

[0074] True dynamic focusing: By calculating and controlling the emission angle of each beam, a high-energy-density light spot can be formed directly at the target at any distance, realizing "multi-target detection, point-and-shoot, real-time focusing, and simultaneous interception", and the system has strong adaptability.

[0075] It can operate in multiple modes, such as focusing the beams of all lasers onto a single target, using some lasers to intercept one target while others intercept another, or using each laser to intercept different targets, thus having a wide range of adaptability.

[0076] When using a low-power visible green laser beam, this solution can simultaneously drive away multiple birds, and achieve optical shearing, area driving, or directional driving performance.

Claims

1. A combined device for optical detection and laser focusing, characterized in that, include: A work stand, said work stand can be driven to rotate in at least the horizontal and pitch directions; A detection component, mounted on the work stand, is configured to scan the airspace within its field of view to detect at least one target and acquire its coordinate information; At least one laser emitting channel is circumferentially distributed and mounted on the work stand; each laser emitting channel includes: A laser light source; A first optical deflection element is located downstream of the optical path of the laser source and is configured to rotate at high speed about a first axis or to cause the beam emitted by the second optical deflection element to be deflected horizontally or vertically, for applying a first deflection to the beam from the second optical deflection element. A second optical deflecting element is located between the first optical deflecting element and the laser source and is configured to rotate at high speed about a second axis or to deflect the incident laser beam vertically or horizontally, for applying a second deflection to the beam from the laser source. A control system is communicatively connected to the detection component and the drive components of each of the laser emission channels; The control system is configured to: independently and collaboratively control the deflection angles of the first optical deflection element and the second optical deflection element in each laser emission channel based on the target coordinate information obtained by the detection component, so that the n laser beams emitted from the n laser emission channels achieve spatial convergence at the far-field target position, where n is an integer greater than 1.

2. The combined device according to claim 1, characterized in that, The first optical deflecting element is a wedge-shaped reflector, the second optical deflecting element is a wedge-shaped light-transmitting mirror, or the first optical deflecting element and the second optical deflecting element are reflectors with their deflection axes perpendicular to each other.

3. The combined device according to claim 2, characterized in that, The wedge angle α1 of the wedge-shaped light transmission lens and the wedge angle α of the wedge-shaped reflector are both within the range of 0.2°-10°, with α=α1, enabling scanning of a circular area within the range of ±2*α. The maximum deflection angle of the output beam of the first deflecting mirror is ±2*α1 and the maximum deflection angle of the output beam of the second deflecting mirror is ±2*α, which realizes the scanning of the horizontal and vertical ranges of (±2*α1) and (±2*α).

4. The combined device according to claim 1, characterized in that, The work frame includes an upper mounting platform and a lower mounting platform arranged at a fixed angle in space; the detection component is installed near the central area of ​​the upper mounting platform; the first optical deflection element of each laser emission channel is installed on the upper mounting platform and distributed around the detection component; the second optical deflection element of each laser emission channel and the laser source are correspondingly installed on the lower mounting platform.

5. The combined device according to claim 4, characterized in that, The fixed angle γ between the upper and lower mounting platforms is between 30° and 60°.

6. The combined device according to claim 5, characterized in that, The fixed included angle γ is 45°.

7. The combined device according to claim 1, characterized in that, The detection component includes a laser scanning detection module, which includes a detection light source for emitting a scanning beam, a pair of rotating scanning prisms for deflecting the scanning beam twice to form a scanning trajectory, or a pair of deflecting mirrors for deflecting the scanning beam twice to form horizontal and vertical scanning lines, and a receiving optical system and detector for receiving the target reflected echo.

8. The combined device according to claim 7, characterized in that, The pair of rotating scanning prisms includes a wedge-shaped light transmission mirror-3 and a wedge-shaped reflector-3, both of which have a wedge angle of approximately 1 / 4 of the full field of view 2*β of the detection component, where β is (0.5°-20°). The pair of deflecting mirrors includes two deflecting mirrors -3 and -4 that deflect around their respective deflection axes. The two deflection axes are spatially perpendicular to each other and each forms a field of view with a maximum ±β deflection angle of the output beam.

9. The combined device according to claim 7, characterized in that, The scanning trajectory of the scanning beam emitted by the laser scanning detection module is one of the following: a rose line, a horizontal scanning line, or a vertical scanning line.

10. The combined device according to claim 1, characterized in that, The detection component is an active and passive optical detection system, selected from imaging devices or combinations thereof, including optical rangefinders, laser scanning radars, and infrared or visible light bands, to simultaneously detect and locate targets within the field of view.

11. The combined device according to claim 1, characterized in that, The detection component is an electromagnetic wave detection system designed to achieve simultaneous and multi-target localization within a large detection field of view.

12. The combined device according to claim 1, characterized in that, Each of the laser emission channels further includes a first encoder for detecting the rotation angle of the first optical deflection element and a second encoder for detecting the rotation angle of the second optical deflection element.

13. The combined device according to claim 1, characterized in that, The rotation of the workpiece is driven by a set of azimuth and pitch macro actuators, and the rotation of the first optical deflection element and the second optical deflection element is driven by corresponding micro actuators; the micro actuators have a higher angular velocity response capability than the macro actuators.

14. The combined device according to claim 13, characterized in that, The control system employs a coarse-fine composite tracking strategy: the macro actuator drives the work frame to perform coarse tracking, so that the target enters and remains within the field of view of the detection component; the micro actuator drives the first and second optical deflection elements to aim.

15. The combined device according to claim 1, characterized in that, Each of the laser emission channels emits lasers of the same wavelength, thereby converging lasers of the same wavelength at the target.

16. The combined device according to claim 1, characterized in that, Each of the laser emission channels emits a different wavelength of laser light, thereby converging lasers of different wavelengths at the target.

17. The combined device according to claim 1, characterized in that, The control system is further configured to: Receive coordinate information of at least two targets; First, the laser beams from each of the laser emission channels are controlled to converge onto the first target; Subsequently, without moving the work stand, all beams are controlled to turn from the first target position and reconverge to the second target position by rapidly changing the angles of the first and second optical deflection elements in each channel; or, The laser beam from the laser emission channel described in the control section is focused onto the first target; Control the laser beam from another part of the laser emission channel to converge onto the second target; Subsequently, without moving the work stand, by rapidly changing the angles of the first and second optical deflection elements in each channel, all beams are controlled to turn from the first target position and reconverge to the second target position, all beams are controlled to turn from the second target position and reconverge to the first target position, and all beams are controlled to turn from the first target position or the second target position and converge to the third target position.

18. The combined device according to claim 17, characterized in that, For targets at different distances, the control system calculates and sets different combinations of deflection angles for each channel, enabling all beams to be dynamically focused at the target distance.

19. A method for multi-target laser strike based on the combined device according to any one of claims 1 to 18, characterized in that, Includes the following steps: S100: Drive the work frame to bring the target into the field of view of the detection component; S200: The target area is scanned by the detection component to identify and obtain the precise spatial coordinates of at least two targets; S300: Based on the coordinates of the first target, calculate and control the optical deflection elements of all laser emission channels to operate synchronously, so that all or part of the laser beams converge on the first target; S400: After completing the preset irradiation of the first target, according to the coordinates of the second target, quickly adjust the angle of the optical deflection elements of all laser emission channels so that all or part of the laser beams turn and converge on the second target.

20. The method according to claim 19, characterized in that, In steps S300 and S400, for each target, the control system independently calculates a unique set of target angles between the first optical deflection element and the second optical deflection element for each laser emission channel based on its distance, so as to achieve precise spatial matching of the beam at the target.

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