A handheld laser strike system

Abstract

The application discloses a handheld laser striking system, and relates to the technical field of photoelectric countermeasure and laser application, which comprises an imaging optical assembly, a thermal imaging assembly, a laser ranging assembly, a laser lighting assembly, a laser beam control assembly and an intelligent control display processing assembly; the output ends of the imaging optical assembly and the thermal imaging assembly are connected to the input end of the intelligent control display processing assembly, and are used for simultaneously receiving visible light and infrared image signals; the output end of the intelligent control display processing assembly is connected with the laser lighting assembly and the laser beam control assembly respectively, and is used for controlling laser lighting and beam pointing according to target information. Through visible light and infrared imaging technology, the application realizes rapid target searching, identifying and tracking under day and night conditions; meanwhile, the handheld integrated design is adopted, the structure is compact, and the application is suitable for single-person portable operation, so that the mobility and battlefield adaptability of combat personnel are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of optoelectronic countermeasures and laser application technology, specifically to a handheld laser strike system, which is particularly suitable for portable optoelectronic countermeasures and precision strike missions for individual soldiers or small teams in urban warfare, special operations and complex terrain conditions. Background Technology

[0002] Existing laser countermeasures systems mostly adopt a split architecture or are deployed on vehicle-mounted or airborne platforms. They typically consist of independent laser emitting units, photoelectric detection units, servo control units, and operation and display units. These units are connected by cables and require tedious optical axis alignment and debugging before combat. This results in systems that are bulky, heavy, and complex, making them unsuitable for the rapid mobility and immediate deployment needs of individual soldiers or small teams in complex and confined terrains such as urban warfare, jungle warfare, and special operations.

[0003] Traditional laser strike equipment faces the dual challenges of optical axis consistency and environmental adaptability in practical applications. Because the emission and aiming optical paths are separate, the system is highly susceptible to optical axis misalignment after transport disturbances, temperature changes, or mechanical shocks, requiring recalibration before each use and severely limiting emergency response speed. Furthermore, existing equipment lacks sufficient target detection and identification capabilities at night or in low-light conditions, and lacks all-weather day-and-night operational support, further restricting its applicability and combat effectiveness in complex battlefield environments.

[0004] As modern warfare evolves towards asymmetric and urban special operations, the demand for portable optoelectronic countermeasures equipment on the front lines is becoming increasingly urgent. Individual soldiers and small combat units urgently need a laser countermeasures system that is compact, easy to carry by a single person, requires no cumbersome on-site optical path calibration, and can effectively perform target search and precision strike missions under different lighting conditions, both day and night. However, existing laser strike equipment cannot yet meet these tactical requirements in terms of portability, optical axis stability, and environmental adaptability, indicating a need and room for further improvement. Summary of the Invention

[0005] The purpose of this invention is to provide a handheld laser strike system to solve the problems of existing laser countermeasure equipment being bulky, complex in structure, inconvenient for single-person deployment, cumbersome optical path calibration, poor optical axis consistency, and difficulty in achieving rapid target search and precise strike in complex day and night environments.

[0006] To address the above problems, the present invention provides a handheld laser strike system, comprising: Imaging optics components for receiving visible light and generating visible light image signals; Thermal imaging components are used to receive infrared radiation and generate infrared image signals; A laser ranging component is used to emit ranging lasers and receive echoes to obtain target distance information; Laser illumination components are used to emit illumination lasers in low-light conditions to assist in target identification; Laser beam control components are used to collimate, expand, focus, and direct the laser beam. The intelligent control display processing component is communicatively connected to the imaging optics component, thermal imaging component, laser ranging component, laser illumination component, and laser beam control component, respectively. The optical paths of the imaging optics component and the laser beam control component are coupled through at least one light splitting and combining element to ensure that the visible light receiving optical axis is consistent with the laser beam emission optical axis. The optical axes of the laser ranging component and the laser illumination component are coupled to the optical axis of the laser beam control component to achieve coaxial calibration with the laser beam emission optical axis. The intelligent control display processing component is used to receive and process visible light image signals and infrared image signals, and to control the laser illumination component and the laser beam control component to perform corresponding actions according to the target distance information and operation instructions. It is also used to control the imaging optics component, the thermal imaging component, and the laser beam control component to work in a time-division mode. The imaging optics component, the thermal imaging component, the laser ranging component, the laser illumination component, the laser beam control component, and the intelligent control display processing component are integrated into a single handheld housing.

[0007] Furthermore, the intelligent control display processing component includes a microdisplay and a freeform prism, forming a binocular augmented reality display module; the intelligent control display processing component is also used to generate an augmented reality graphics layer containing tactical assistance information, and digitally fuse the augmented reality graphics layer with visible light image signals or infrared image signals to form a wide-angle virtual image with depth perception information for binocular observation.

[0008] Furthermore, the laser beam control component also includes a two-dimensional microelectromechanical system micromirror array disposed in the optical path at the rear end of the fast reflector; the intelligent control display processing component is used to analyze the light intensity scintillation characteristics of the target area captured by the imaging optical component to extract atmospheric turbulence disturbance information, and thereby drive the microelectromechanical system micromirror array to perform wavefront phase modulation on the laser beam to compensate for beam distortion during atmospheric transmission.

[0009] Furthermore, the handheld housing also integrates a three-axis inertial measurement unit for real-time sensing of the jitter vector of the handheld housing; the intelligent control display processing component is used to synchronously control the fast-reflecting mirror to reverse deflection according to the jitter vector in tracking lock mode to stabilize the laser emission optical axis, and to crop and compensate the output image of the image sensor to stabilize the display image.

[0010] Furthermore, it also includes an ambient light sensor, and the laser illumination component includes an illumination power adjustment unit, a pulse modulation unit, and an illumination wavelength switching unit; the illumination power adjustment unit is used to dynamically adjust the laser illumination power based on the ambient light intensity and the image signal-to-noise ratio feedback of the thermal imaging component; the pulse modulation unit is used to convert continuous laser illumination into pulsed laser illumination, and the pulse frequency and duty cycle are adaptively adjusted according to the target distance and the ambient background radiation characteristics; the illumination wavelength switching unit is used to switch between multiple discrete wavelengths in the near-infrared band.

[0011] The present invention has the following beneficial effects: (1) This invention integrates imaging optical components, thermal imaging components, laser ranging components, laser illumination components, laser beam control components, and intelligent control display processing components into a single handheld housing, achieving a high degree of system integration and portability. The use of a semi-reflective mirror ensures that the visible light receiving optical axis and the laser beam emitting optical axis are aligned, guaranteeing aiming accuracy and long-term optical axis stability. The introduction of a time-division multiplexing mode avoids interference and damage to the imaging sensor caused by laser emission, ensuring reliable system operation in complex battlefield environments.

[0012] (2) This invention integrates visible light imaging and infrared thermal imaging dual-channel detection methods, combined with laser ranging and laser illumination assistance functions, enabling the system to have all-weather target search, identification and tracking capabilities day and night. The intelligent control display processing component realizes the integrated processing of image parallel display, automatic focusing calculation and servo tracking control. The fast-reflecting mirror closed-loop tracking system can lock onto dynamic targets with high precision, improving the combat response speed and hit probability of the handheld laser strike system.

[0013] (3) This invention compresses the core functions of traditional vehicle-mounted or airborne laser strike systems into a handheld form for individual soldiers. Through a common optical axis optical path structure and an integrated control architecture, it solves the defects of existing equipment, such as large size, difficult deployment, and easy optical axis misalignment. The system has a compact structure, is easy to operate, and has strong environmental adaptability, providing individual soldiers and small teams with a portable optoelectronic countermeasure that is responsive, precise, and efficient in urban warfare and special operations scenarios. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural diagram of a handheld laser strike system according to an embodiment of the present invention; Figure 2 This is an overall diagram of a handheld laser strike system according to an embodiment of the present invention; Figure 3 This is a rear view of a handheld laser strike system according to an embodiment of the present invention; Figure 4 This is a front view of a handheld laser strike system according to an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1-Objective lens group; 2-Thermal imaging component; 3-Fast-reflecting mirror; 4-Focusing lens; 5-Laser input end; 6-Collimating lens group; 7-Reflecting mirror; 8-Intelligent control display processing component; 9-Imaging lens group; 10-Charge-coupled device image sensor; 11-Semi-reflective mirror; 12-Laser ranging component; 13-Laser illumination component; 14-Eyepiece. Detailed Implementation

[0017] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0018] To fully understand this invention, detailed steps and structures will be presented in the following description to illustrate the technical solution of this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0019] like Figures 1 to 4 As shown, in one embodiment of the handheld laser strike system of the present invention, the handheld laser strike system adopts an integrated design, with all functional components integrated into a single handheld housing. The handheld housing has control buttons on its exterior, which are electrically connected to an intelligent control display processing component 8. These buttons are used to receive control commands from the operator to perform at least one of the following operations: target search, ranging, illumination, strike, and time-sharing working mode switching. An eyepiece 14 is located at the rear end of the handheld housing, allowing the operator to observe the fused image information presented by the system.

[0020] The handheld laser strike system includes an imaging optical component, a thermal imaging component 2, a laser rangefinder component 12, a laser illumination component 13, a laser beam control component, and an intelligent control display and processing component 8.

[0021] The imaging optical assembly is used to receive visible light reflected or radiated from the target scene and convert the visible light into a visible light image signal that can be processed and displayed. Specifically, the imaging optical assembly includes an objective lens group 1, a semi-reflective mirror 11, an imaging lens group 9, a first reflecting mirror, and a charge-coupled device image sensor CCD 10 located on the reflected light path of the first reflecting mirror, arranged sequentially along the incident direction of visible light.

[0022] Objective lens group 1, serving as the shared optical window at the very front of the system, is used to collect visible light and infrared radiation from the target scene and to initially converge the incident beam. Objective lens group 1 is composed of multiple spherical or aspherical lenses to correct optical aberrations such as spherical aberration, chromatic aberration, and astigmatism, ensuring image sharpness across the entire field of view. After being converged by objective lens group 1, external visible light passes through the semi-reflective mirror 11 and enters the subsequent optical path.

[0023] The semi-reflective mirror 11 has specific spectral dispersion characteristics, exhibiting high transmittance in the visible light band and high reflectivity in the band containing the laser beam. Therefore, visible light from the objective lens group 1 passes through the semi-reflective mirror 11 almost without loss and continues to propagate backward.

[0024] Imaging lens group 9 is positioned behind the semi-reflective mirror 11 to perform secondary imaging correction and aberration compensation on the visible light beam transmitted through the semi-reflective mirror 11, ensuring that the final image image projected onto the target surface of the charge-coupled device image sensor CCD 10 has sufficient resolution and contrast. The first reflecting mirror behind imaging lens group 9 deflects the visible light beam corrected by imaging lens group 9 at a certain angle, accurately projecting it onto the photosensitive surface of the charge-coupled device image sensor CCD 10. The charge-coupled device image sensor CCD 10 converts the received visible light signal into a charge signal, and after analog-to-digital conversion, outputs the visible light image signal to the intelligent control display processing component 8.

[0025] The thermal imaging component 2 is used to receive infrared radiation from the target scene and generate an infrared image signal. The thermal imaging component 2 is independently mounted on the front end of the handheld housing, with its detection window adjacent to the objective lens group 1 of the imaging optics component for simultaneous observation of the same target area. The thermal imaging component 2 includes an infrared optical lens, an infrared focal plane detector, and a signal processing circuit. The infrared optical lens collects mid-wave or long-wave infrared radiation from the target scene and focuses it onto the infrared focal plane detector. The infrared focal plane detector converts the infrared radiation into an electrical signal, which, after non-uniformity correction, gain adjustment, and analog-to-digital conversion by the signal processing circuit, outputs an infrared image signal to the intelligent control and display processing component 8.

[0026] The laser ranging component 12 is used to emit a ranging laser towards a target and receive the echo reflected from the target to obtain accurate target distance information. The laser ranging component 12 includes a ranging laser emitter, a transmitting optical antenna, a receiving optical antenna, and an echo detection circuit. The ranging laser emitter preferably uses a semiconductor laser diode, emitting a wavelength in the near-infrared band safe for the human eye, such as the 1530 nm to 1570 nm range. The transmitting optical antenna is used to collimate the ranging laser, giving the emitted beam a small divergence angle. The receiving optical antenna is used to collect the ranging laser echo diffusely reflected from the target and focus it onto the photodetector of the echo detection circuit. The echo detection circuit calculates the time interval from laser emission to reception based on the time-of-flight method, thereby calculating the target distance value and transmitting this distance information to the intelligent control display processing component 8.

[0027] The laser illumination component 13 emits an illumination laser at night or in low-light environments to assist the imaging optics component or thermal imaging component 2 in target identification. The operating wavelength of the laser illumination component 13 is selected to be a wavelength range that does not overlap with that of the thermal imaging component 2. For example, when the thermal imaging component 2 operates in the 8-12 micrometer long-wave infrared band, the laser illumination component 13 operates in the 800-900 nanometer near-infrared band to avoid crosstalk or saturation interference from the illumination laser on infrared thermal imaging detection. The laser illumination component 13 includes an illumination laser diode, an illumination optical lens group, and a driving circuit. The driving circuit receives control signals from the intelligent control display processing component 8 to adjust the output power, pulse mode, and operating wavelength of the illumination laser.

[0028] The laser beam control assembly serves as the common transmission channel for all laser functional modules within the system, used for collimating, expanding, focusing, and high-precision pointing control of the laser beam. The laser beam control assembly includes a laser input terminal 5, a second reflecting mirror (i.e., reflecting mirror 7), a collimating lens group 6, a focusing lens 4, a fast-reflecting mirror 3, and a shared objective lens group (i.e., objective lens group 1).

[0029] The laser input end 5 is a fiber optic interface or free-space optical interface located in the handheld housing, used to introduce a laser beam generated by an external or built-in high-energy laser. The operating wavelength of the laser beam is typically located in the near-infrared or short-wave infrared atmospheric window, such as 1064 nm or 1550 nm. The laser beam emitted from the laser input end 5 first enters the reflector 7, which deflects the beam at a certain angle before guiding it into the collimating lens group 6.

[0030] The collimating lens group 6 consists of multiple lenses and is used to collimate the incident laser beam with a certain divergence angle, reducing its divergence angle and improving the beam's directionality. The collimated laser beam then enters the focusing lens 4. The focusing lens 4 can move back and forth along the optical axis; its positional movement is achieved by a precision linear drive mechanism, such as a voice coil motor or stepper motor driving a cam mechanism. The axial displacement of the focusing lens 4 changes the wavefront curvature of the emitted laser beam, thereby achieving focusing adjustment for targets at different distances.

[0031] The laser beam, focused by the focusing lens 4, continues to propagate to the fast-reflecting mirror 3. The fast-reflecting mirror 3 is a two-dimensional high-speed deflecting mirror whose surface can rapidly deflect at two orthogonal axes, typically within milliradians to tens of milliradians, with a response bandwidth reaching hundreds of hertz. The fast-reflecting mirror 3 is connected to a servo control unit, which receives deflection commands from the intelligent control display processing component 8 and drives the voice coil actuator or piezoelectric ceramic actuator within the fast-reflecting mirror 3 to adjust the mirror angle in real time, thereby precisely controlling the direction of the emitted laser beam.

[0032] The laser beam, reflected by the fast-reflecting mirror 3, is directed towards the shared objective lens group, namely objective lens group 1. Objective lens group 1 serves to expand the laser beam and provide final pointing correction in the laser emission path, directing the laser beam towards the target with a very small divergence angle. As mentioned earlier, a semi-reflective mirror 11 is positioned between objective lens group 1 and imaging lens group 9, and is also located in the exit optical path of the laser beam after reflection by the fast-reflecting mirror 3. Because the semi-reflective mirror 11 has high reflectivity for the wavelength of the laser beam, most of the laser beam is reflected by the semi-reflective mirror 11, and after being expanded in the opposite direction by objective lens group 1, it is directed towards the target.

[0033] Through the aforementioned optical layout, the optical paths of the imaging optical components and the laser beam control components are coupled via a semi-reflective mirror 11, ensuring a high degree of consistency between the visible light receiving optical axis and the laser beam emission optical axis after passing through the objective lens group 1—a common optical axis design. Simultaneously, the emission and receiving optical axes of the laser ranging component 12 and the illumination optical axis of the laser illumination component 13 are connected to the optical path of the laser beam control component via their respective independent coupling mirror groups or beam splitters, or share some optical elements with the laser beam control component. This achieves coaxial calibration of each laser functional optical axis with the main laser beam emission optical axis, ensuring spatial overlap between the ranging target point, the illumination area, and the strike aiming point.

[0034] The intelligent control and display processing component 8 serves as the central control and information processing core of the system, including an embedded processor, an image processing chip, a display driver circuit, input / output interfaces, and a display screen. The intelligent control and display processing component 8 is communicatively connected to the charge-coupled device (CCD) image sensor 10 of the imaging optics component, the thermal imaging component 2, the laser ranging component 12, the laser illumination component 13, and the fast-reflecting mirror 3 and focusing lens 4 drive circuits in the laser beam control component.

[0035] The intelligent control display processing component 8 receives visible light image signals and infrared image signals. After noise suppression, contrast enhancement, edge sharpening, and image fusion processing by the image processing chip, the signals are displayed on the display screen. The display screen is used to simultaneously display visible light images and infrared images side by side in the same display area for visual interpretation by the operator; or, according to operation instructions, to overlay the two images in a picture-in-picture format.

[0036] The intelligent control display processing component 8 generates corresponding control signals based on the target distance information acquired by the laser ranging component 12 and the operation commands input by the operator through the control buttons. For example, after receiving the ranging information, the intelligent control display processing component 8 drives the focusing lens 4 to move to the corresponding position to achieve automatic focusing; in the tracking lock mode, the intelligent control display processing component 8 calculates the target tracking deviation signal and sends it to the servo control unit of the fast-reflecting mirror 3 to adjust the laser pointing in real time.

[0037] To prevent strong echoes or scattered light generated during laser emission from causing saturation or even permanent damage to the high-sensitivity imaging sensor, the intelligent control and display processing component 8 controls the imaging optical component, thermal imaging component 2, and laser beam control component to operate in a time-division multiplexing mode. Specifically, within one working cycle, the intelligent control and display processing component 8 first activates the imaging optical component and thermal imaging component 2 for image acquisition and target recognition. During this time, the laser beam control component is in standby mode and does not emit a laser strike beam. When laser ranging, laser illumination, or laser strike is required, the intelligent control and display processing component 8 briefly shuts down or shields the imaging sensor, or uses synchronous shutter control to put the imaging sensor in a non-integral state at the moment of laser emission, and resumes image acquisition after the laser pulse ends. The time-division multiplexing mode effectively avoids strong light interference, ensuring image quality and sensor safety.

[0038] The system also includes a central processing unit (CPU), which can be integrated into the intelligent control and display processing component 8 as part of its core processor, or it can be set up independently as a dedicated microcontroller and connected to the intelligent control and display processing component 8 via a bus. The CPU is used to automatically calculate and drive the focusing lens 4 in the laser beam control component to move to the corresponding position based on the target distance information obtained by the laser ranging component 12, using a pre-calibrated focusing curve or a real-time calculated optical transfer function, so as to achieve automatic focusing of the laser beam at the target distance.

[0039] The fast-reflecting mirror 3 and the servo control unit form a closed-loop tracking system. The intelligent control display processing component 8 extracts the target's position information from the image sequence, calculates the deviation of the target's position relative to the image center, and generates a target tracking deviation signal. The servo control unit receives the deviation signal and drives the fast-reflecting mirror 3 to deflect in the opposite direction, continuously locking the laser beam onto the target. Through high-bandwidth servo control, the system can stably track and engage dynamic targets with speeds in the tens of meters per second range.

[0040] In one specific embodiment, a heat-insulating baffle is installed inside the handheld housing. The baffle is made of engineering plastic or ceramic matrix composite material with low thermal conductivity, effectively isolating the first heat source area (where the laser beam control component is located) from the second heat source area (where the intelligent control display processing component 8 is located). A phase change material composite heat dissipation layer is attached to the inner wall of the first heat source area or the surface of the laser heat sink. This layer is composed of a paraffin-based or inorganic salt hydrate-based phase change material combined with a high thermal conductivity graphite film or metal foam. When the system is in a short-term high-power laser emission state, the phase change material composite heat dissipation layer absorbs a large amount of waste heat generated by the laser and undergoes a solid-liquid phase change, storing the heat as latent heat, thereby suppressing the instantaneous temperature rise in the first heat source area. When the system switches to standby or low-power search mode, the phase change material composite heat dissipation layer slowly releases the stored heat through the surface of the handheld housing via convection and radiation, returning to a solid state for the next heat absorption cycle. This solution effectively ensures the thermal stability of the laser and the quality of the output beam without requiring an additional active fan or liquid cooling circuit.

[0041] In one specific embodiment, the system also includes an infrared pupil detection sensor disposed next to the observation channel of the eyepiece 14. The infrared pupil detection sensor comprises an infrared light-emitting diode and an infrared-sensitive charge-coupled device (CCD) image sensor, operating at a near-infrared wavelength of 850 nm or 940 nm, which is invisible to the human eye and causes no stimulation. The infrared pupil detection sensor is connected to the biometric recognition module within the intelligent control display processing component 8. The biometric recognition module pre-stores a template of the pupil's geometric features under normal observation conditions. When the operator's eyes are against the rubber hood of the eyepiece 14 and focused on the observation screen, the infrared pupil detection sensor acquires a near-infrared image of the eye area, and the biometric recognition module extracts and matches the pupil contour in the image. Only when the biometric recognition module detects that the operator's eyes are in contact with the observation position and the pupil size and shape meet the preset conditions, will the intelligent control display processing component 8 send an unlock command to the laser beam control component's emission switch circuit to release the safety lock and allow the triggering of the strike laser. Once it detects that the eyes have moved away from the observation position, closed, or that the pupil characteristics are abnormal, the intelligent control display processing component 8 immediately switches to the safety lock state, cuts off the laser emission circuit, and eliminates the possibility of accidental laser emission accidents caused by accidental button presses, equipment drops, or unauthorized personnel operation.

[0042] In one specific embodiment, the intelligent control display processing component 8 includes a microdisplay and a freeform prism, forming a binocular augmented reality display module to replace the traditional monocular lens 14 for direct observation of the display screen. The microdisplay uses a high-brightness organic light-emitting diode microdisplay or a silicon-based liquid crystal microdisplay, and the freeform prism combines optical path refraction and optical perspective functions. While generating the basic video image, the intelligent control display processing component 8 also generates an augmented reality graphics layer containing tactical assistance information, including but not limited to target distance values, target azimuth, wind direction and speed compensation suggestions, target lock box markings, system remaining battery indicator, and laser temperature alarm icon. The augmented reality graphics layer and the processed visible light image signal or infrared image signal are digitally superimposed and perspective corrected in the image fusion unit, ultimately forming a wide-angle virtual image with depth perception information, which is projected onto the operator's left and right eyes respectively. Through binocular observation, the operator can obtain a stereoscopic fused image and intuitively read all key tactical parameters without removing their gaze from the observation window, shortening the reaction time from target search and identification to decision-making and strike.

[0043] In one specific embodiment, the laser beam control component further includes a two-dimensional microelectromechanical system (MEMS) micromirror array disposed in the optical path at the rear end of the fast reflector 3. The MEMS micromirror array consists of thousands of independently controllable micromirror units, each capable of sub-micrometer-level up-and-down piston motion or deflection under electrostatic or electromagnetic force. The intelligent control display processing component 8 continuously analyzes the light intensity scintillation characteristics of the target area captured by the charge-coupled device (CCD) image sensor 10 in the imaging optical component using a high-speed image processing algorithm, extracting atmospheric turbulence disturbance information such as the refractive index structure constant and coherence length, reflecting the intensity of atmospheric turbulence. Based on the extracted disturbance information, the intelligent control display processing component 8 calculates the required phase correction map and controls the displacement of each micromirror unit in the MEMS micromirror array through a high-voltage drive circuit, performing real-time, high-resolution phase modulation of the laser beam wavefront. The laser beam, after being actively compensated by the micromirror array of the microelectromechanical system, has its wavefront distortion pre-canceled when passing through the subsequent atmospheric transmission path, thereby suppressing beam spread and center of gravity jitter, and improving the energy concentration and strike effectiveness of the far-field beam.

[0044] In one specific embodiment, the handheld housing also integrates a three-axis inertial measurement unit (IMU), which includes three orthogonally arranged microelectromechanical system (MEMS) gyroscopes and three orthogonally arranged MEMS accelerometers. These are used to sense the angular velocity vectors and acceleration vectors of the handheld housing in three degrees of freedom in space in real time, and to output the jitter vector data of the handheld housing. When the intelligent control and display processing component 8 determines that the system has entered the tracking lock mode and the jitter vector data amplitude exceeds a preset threshold, the intelligent control and display processing component 8 activates dual anti-shake control. The first layer is physical optical path anti-shake. After performing coordinate transformation and gain calculation on the jitter vector data, the intelligent control and display processing component 8 generates a feedforward compensation command for the fast-reflecting mirror 3, which is superimposed on the target tracking servo control command to drive the fast-reflecting mirror 3 to perform a real-time deflection opposite to the jitter direction of the handheld housing, thereby stabilizing the direction of the laser emission optical axis. The second layer is electronic image stabilization. The intelligent control display processing component 8 simultaneously performs motion estimation and motion compensation on the raw image sequence output by the charge-coupled device image sensor CCD 10. Based on the jitter vector data, it crops the effective pixel area and remaps it for output, thereby stabilizing the image observed by the operator on the display screen or in the eyepiece 14. The dual stabilization mechanisms work together to effectively overcome the adverse effects of physiological tremors on aiming accuracy and observation comfort under handheld operation conditions.

[0045] In one specific embodiment, the system further includes an ambient light sensor, which is mounted on the front end of the handheld housing and has a spectral response curve close to the human eye's visual function, for real-time monitoring of ambient light intensity in the combat environment. The laser illumination assembly 13 internally includes an illumination power adjustment unit, a pulse modulation unit, and an illumination wavelength switching unit. The illumination power adjustment unit receives ambient light intensity data and real-time image signal-to-noise ratio feedback values ​​from the thermal imaging assembly 2, dynamically calculates the required laser illumination power using a proportional-integral-derivative closed-loop control algorithm, and maintains the illumination power at a level necessary to ensure that the thermal imaging assembly 2 obtains a preset minimum acceptable image signal-to-noise ratio, avoiding energy waste and exposure risks caused by excessive illumination.

[0046] The pulse modulation unit converts the originally continuously output laser illumination into pulsed laser illumination. Based on the target distance information and ambient background radiation characteristics provided by the intelligent control display processing component 8, the pulse modulation unit adaptively adjusts the pulse frequency and duty cycle. The pulse frequency is adjustable from 100 Hz to 10000 Hz, and the duty cycle is adjustable from 5% to 50%. By adopting pulsed illumination mode, while maintaining the average illumination power, the instantaneous peak power of the laser diode is increased to several to tens of times that of the continuous operation mode. This effectively extends the effective illumination distance, enhances image contrast, and, due to the low duty cycle of the pulse signal, reduces the probability of interception by enemy detection equipment using synchronous gating scanning technology.

[0047] The illumination wavelength switching unit is used to rapidly switch between multiple discrete wavelengths in the near-infrared band. Specifically, the laser illumination assembly 13 integrates multiple near-infrared laser diode chips with different center wavelengths, or employs a tunable external cavity laser structure. The illumination wavelength switching unit receives instructions from the intelligent control and display processing assembly 8, selects and activates a specific wavelength laser diode via a high-speed analog switch, or adjusts the external cavity grating angle via a microelectromechanical system to change the output wavelength, with a wavelength switching time of less than 10 milliseconds. Operators can select illumination wavelengths that avoid the sensitive bands of known enemy photoelectric detection equipment based on prior intelligence or real-time battlefield electromagnetic environment monitoring results, thereby further reducing the probability of detection of illumination activities and enhancing the system's stealthy attack capabilities and survivability in hostile environments.

[0048] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, nor is it limited to handheld laser strike systems. Devices and structures not described in detail herein should be understood as being implemented in a manner common to the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, still fall within the protection scope of the present invention.

Claims

1. A handheld laser strike system, characterized in that, include: Imaging optics components for receiving visible light and generating visible light image signals; Thermal imaging components are used to receive infrared radiation and generate infrared image signals; A laser ranging component is used to emit ranging lasers and receive echoes to obtain target distance information; Laser illumination components are used to emit illumination lasers in low-light conditions to assist in target identification; Laser beam control components are used to collimate, expand, focus, and direct the laser beam. The intelligent control display processing component is communicatively connected to the imaging optics component, thermal imaging component, laser ranging component, laser illumination component, and laser beam control component, respectively. The optical paths of the imaging optics component and the laser beam control component are coupled through at least one light splitting and combining element to ensure that the visible light receiving optical axis is consistent with the laser beam emission optical axis. The optical axes of the laser ranging component and the laser illumination component are coupled to the optical axis of the laser beam control component to achieve coaxial calibration with the laser beam emission optical axis. The intelligent control display processing component is used to receive and process visible light image signals and infrared image signals, and to control the laser illumination component and the laser beam control component to perform corresponding actions according to the target distance information and operation instructions. It is also used to control the imaging optics component, the thermal imaging component, and the laser beam control component to work in a time-division mode. The imaging optics component, the thermal imaging component, the laser ranging component, the laser illumination component, the laser beam control component, and the intelligent control display processing component are integrated into a single handheld housing.

2. The handheld laser strike system according to claim 1, characterized in that, The imaging optical components include an objective lens group, a semi-reflective lens, an imaging lens group, a first reflecting mirror, and a charge-coupled device image sensor located on the reflected light path of the first reflecting mirror, arranged sequentially along the visible light incident direction. External visible light passes through the objective lens group, the semi-reflective lens, and the imaging lens group in sequence and is reflected by the first reflecting mirror to the charge-coupled device image sensor to generate a visible light image signal.

3. The handheld laser strike system according to claim 2, characterized in that, The laser beam control assembly includes a laser input end, a second reflecting mirror, a collimating lens group, a focusing lens, a fast-reflecting mirror, and a common objective lens group. The laser input end is used to introduce the laser beam, and the second reflecting mirror is used to reflect the laser beam to the collimating lens group. The collimating lens group, the focusing lens, and the fast-reflecting mirror are arranged sequentially along the beam propagation direction. The fast-reflecting mirror is used to reflect the focused laser beam to the common objective lens group. The common objective lens group and the objective lens group in the imaging optics assembly are the same optical element. A semi-reflective mirror is arranged between the common objective lens group and the imaging lens group, and is also located in the outgoing light path of the laser beam after reflection by the fast-reflecting mirror. It is used to reflect part of the laser beam towards the target and transmit visible light from the target to the imaging lens group.

4. The handheld laser strike system according to claim 1, characterized in that, The intelligent control display processing component includes a display screen for simultaneously displaying visible light images and infrared images side-by-side in the same display area.

5. The handheld laser strike system according to claim 3, characterized in that, It also includes a central processing unit, which is either built into the intelligent control and display processing component or set up independently and connected to the intelligent control and display processing component. The central processing unit is used to automatically calculate and drive the focusing lens in the laser beam control component to move to the corresponding position based on the target distance information obtained by the laser ranging component, so as to realize the automatic focusing of the laser strike beam at the target distance.

6. The handheld laser strike system according to claim 1, characterized in that, The fast-reflecting mirror is connected to a servo control unit, which receives the target tracking deviation signal from the intelligent control display processing component and adjusts the deflection angle of the fast-reflecting mirror in real time to complete the continuous tracking of the dynamic target and the locking of the laser strike beam.

7. The handheld laser strike system according to claim 1, characterized in that, The operating wavelength of the laser illumination component is within a wavelength range that does not overlap with that of the thermal imaging component.

8. The handheld laser strike system according to claim 1, characterized in that, The handheld housing has control buttons on its exterior. These buttons are electrically connected to the intelligent control display and processing component and are used to receive control commands from the operator to perform at least one of the following operations: target search, ranging, illumination, striking, and time-sharing work mode switching.

9. The handheld laser strike system according to claim 1, characterized in that, The handheld housing has a heat insulation partition inside to thermally isolate the first heat source area where the laser beam control component is located from the second heat source area where the intelligent control display processing component is located. A phase change material composite heat dissipation layer is attached to the inner wall of the first heat source area or the surface of the laser heat sink. The phase change material composite heat dissipation layer is used to absorb and store heat when the laser is emitted, and release heat through the surface of the handheld housing during standby or low power search.

10. The handheld laser strike system according to claim 1, characterized in that, It also includes an infrared pupil detection sensor located next to the eyepiece observation channel or on the side of the handheld housing facing the operator; the infrared pupil detection sensor is connected to the biometric recognition module inside the intelligent control display processing component; the intelligent control display processing component releases the safety lock on the laser beam control component only when the biometric recognition module detects that the operator's eyes are in contact with the observation position and the pupil meets the preset conditions.

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