Handheld dynamic laser simulation device and method

Abstract

The present invention provides a handheld dynamic laser simulation device and method, which relate to the field of laser simulation technology. The device comprises a collimating lens group, a driven gear, a variable aperture, a first shaft system, a first attenuation plate, a second shaft system, a second attenuation plate, a synchronous pulley and a synchronous belt. The compact optical design makes the device small in size and light in weight, which is convenient for testing in the early stage of a laser guide head. The transmission mode of the synchronous pulley makes the first attenuation plate and the second attenuation plate always rotate synchronously during the rotation process, and the attenuation ratio accuracy is improved, so that the laser simulation output signal is more accurate and reliable. The driven gear drives the aperture rod on the variable aperture to rotate to realize the change of the aperture diameter, and simulates the light spot from far to near, which solves the shortcomings of the prior art such as high testing cost, high difficulty of various conditions involved in the testing process, and long test preparation time.

Description

Technical Field

[0001] The invention relates to the technical field of laser simulation, and in particular to a handheld dynamic laser simulation device and method. Background Art

[0002] At present, in the field of laser guidance technology, laser seekers are developing rapidly. With the rapid development of science and technology, high-precision, low-cost laser seekers have become the main research direction of the industry development, and at the same time have the advantages of high strike accuracy, strong anti-interference ability, small size, light weight, etc. According to the above requirements and characteristics of laser seekers, it is necessary to introduce a high-precision, convenient and flexible test environment, that is, a laser semi-physical simulation device, to test the performance of laser seekers. At present, most laser simulation devices are installed on the outer two axes of the five-axis turntable, and the laser seeker is installed on the inner three axes of the five-axis turntable; the laser simulation device models its simulated diffuse reflection spot to the entrance pupil of the optical system of the seeker, and the movement of the laser simulation device is driven by the movement of the outer two axes of the five-axis turntable. The laser seeker servo platform stably tracks the energy center of the spot to complete the semi-physical simulation test. However, in the research and development stage, the test requires a flexible and convenient method to modify the laser seeker program at any time. Obviously, the five-axis turntable has high cost, the various conditions involved in the test process are difficult, and the test preparation time is long. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a handheld dynamic laser simulation device and method.

[0004] A handheld dynamic laser simulation device, the handheld dynamic laser simulation device includes a collimating lens group, a variable aperture assembly and an attenuation assembly which are connected in sequence laterally, a fiber laser is arranged below the attenuation assembly, the variable aperture assembly includes a variable aperture, a support frame and a driven gear, the variable aperture is mounted on the driven gear, the driven gear is mounted on the support frame, the driven gear is connected to the power output end of a first power device, the attenuation assembly includes a first shaft system, a second shaft system and a main frame, the first shaft system and the second shaft system are both mounted on the main frame, the support frame is connected to the main frame, a first attenuation plate is mounted on the first shaft system, a second attenuation plate is mounted on the second shaft system, the power input ends of the first shaft system and the second shaft system are both provided with synchronous pulleys, a synchronous belt is mounted on the synchronous pulleys, and the second shaft system is connected to the power output end of the second power device.

[0005] Furthermore, the collimating lens group includes a lens barrel and an adapter flange, one end of the lens barrel is connected to one end of the adapter flange, and the interior of the other end of the lens barrel is laterally provided with a lens pressure ring, a lens spacer and a lens in sequence, the other end of the adapter flange is connected to a support frame, the lens barrel and the adapter flange are connected by multiple screws, and an adjustment gasket is also provided at the connection between the lens barrel and the adapter flange.

[0006] Furthermore, the operating wavelength of the collimator lens group is 1064nm±5nm, the exit pupil diameter of the collimator lens group is 100mm, the field angle of the collimator lens group is ±0.43°, the focal length of the collimator lens group is 300mm, the operating wavelength of the fiber laser is 1064nm, and the optical pulse width of the fiber laser is 15ns.

[0007] Furthermore, the variable aperture assembly also includes an aperture mounting axis system, a homogenizer lens group and a beam expander lens group, the aperture mounting axis system, the homogenizer lens group and the beam expander lens group are all mounted on a supporting frame, the variable aperture is mounted inside the aperture mounting axis system, and the supporting frame and the aperture mounting axis system, the homogenizer lens group and the beam expander lens group are located on the same axis.

[0008] Furthermore, the first power device is a first driving motor, the variable aperture assembly further comprises a driving gear, a power output end of the first driving motor is connected to the driving gear, and the driving gear is meshed with a driven gear.

[0009] Furthermore, the variable aperture assembly also includes a first photoelectric switch seat and a first photoelectric switch, the first photoelectric switch seats arranged in pairs are installed on the driven gear, the first photoelectric switches arranged in pairs are installed on the supporting frame, and the first photoelectric switch seats correspond to the first photoelectric switches in position.

[0010] Furthermore, the attenuation component also includes an optical fiber head, which is installed on the main frame. The optical fiber head and the optical fiber laser are connected through an optical fiber wire. The second power device is a second drive motor, and the power output end of the second drive motor is connected to the second shaft system.

[0011] Furthermore, the attenuation assembly also includes a second photoelectric switch seat and a second photoelectric switch, the second photoelectric switch seat is installed on the first axis system, the second photoelectric switch is installed on the main frame, and the second photoelectric switch seat and the second photoelectric switch correspond in position.

[0012] Furthermore, the handheld dynamic laser simulation device also includes a handle and an outer cover, the outer cover is arranged outside the variable aperture assembly and the attenuation assembly, the fiber laser is arranged inside the outer cover, the adapter flange is connected to the outer cover, and the handles arranged in pairs are installed outside the outer cover.

[0013] The present invention also includes a dynamic laser simulation method, which is implemented based on a handheld dynamic laser simulation device described in any of the above items. The fiber laser emits a laser light source, which is then transmitted to the fiber head through an optical fiber wire. The laser light source is emitted from the fiber head, and then the laser light source is incident on the first attenuation plate and the second attenuation plate. After the laser light source is emitted from the first attenuation plate and the second attenuation plate, it is incident on a beam expansion lens group. After the laser light source is expanded by the beam expansion lens group, the laser light source passes through the center hole of the variable aperture, and the size of the center hole of the variable aperture is changed to change the spot size of the laser light source. Then the laser light source is emitted through a collimating lens group.

[0014] The technical solution of the present invention has the following advantages:

[0015] 1. The present invention provides a handheld dynamic laser simulation device, which adopts a compact optical design. The device is small in size and light in weight, and is convenient for testing in the initial stage of the laser seeker. It provides the laser seeker with a laser target beam with a certain energy and a variable spot size to assess the tracking performance of the seeker. The device adopts a synchronous pulley transmission method, so that the first attenuation plate and the second attenuation plate are always in synchronous rotation during the rotation process, so that the attenuation ratio accuracy is improved, and the attenuation ratio error caused by the rotation error of the shaft system is avoided, so that the laser simulation output signal is more accurate and reliable. In addition, the driven gear drives the variable iris to rotate, and then the iris rod on the variable iris rotates to achieve the change in the size of the iris aperture, simulating the spot from far to near, which is equivalent to the laser seeker seeing the target at infinity.

[0016] 2. In the technical solution provided by the present invention, a fiber laser provides a laser light source for the semi-physical simulation of the guide head. After being attenuated by the first attenuation plate and the second attenuation plate, the laser light source is expanded by a beam expansion lens group and enters the guide head. The laser light source has the characteristics of short adjustment time and high output energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a cross-sectional view of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the collimating lens assembly of the present invention;

[0020] Figure 3 A side view of the variable aperture assembly structure of the present invention;

[0021] Figure 4 It is a front view of the variable aperture assembly structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the attenuation component of the present invention.

[0023] Description of reference numerals:

[0024] 1-collimating lens group; 1-1-lens pressure ring; 1-2-lens spacer; 1-3-lens; 1-4-lens barrel; 1-5-screw; 1-6-adjusting washer; 1-7-adapter flange; 2-handle; 2-1-diaphragm mounting shaft system; 2-2-variable diaphragm; 2-3-first driving motor; 2-4-homogenizing lens group; 2-5-support frame; 2-6-driving gear; 2-7-first photoelectric switch seat; 2-8-driven gear; 2-9-first photoelectric switch; 2-10-beam expansion lens group; 3-outer cover; 3-1-first attenuation plate; 3-2-first axis system; 3-3-optical fiber head; 3-4-second axis system; 3-5-second attenuation plate; 3-6-main frame; 3-7-synchronous pulley; 3-8-second drive motor; 3-9-second photoelectric switch seat; 3-10-second photoelectric switch; 4-variable aperture assembly; 5-attenuation assembly; 6-optical fiber laser. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figure 1 , Figure 3 , Figure 4 and Figure 5 A handheld dynamic laser simulation device is shown, comprising a collimating lens group 1, a variable aperture assembly 4 and an attenuation assembly 5 which are connected in sequence laterally, a fiber laser 6 is arranged below the attenuation assembly 5, the variable aperture assembly 4 comprises a variable aperture 2-2, a support frame 2-5 and a driven gear 2-8, the variable aperture 2-2 is mounted on the driven gear 2-8, the driven gear 2-8 is mounted on the support frame 2-5, the driven gear 2-8 is connected to the power output end of the first power device, the attenuation assembly 5 comprises a first shaft system 3-2, a second shaft system 3-4 and a main frame 3-6, the first shaft system 3-2 and the second shaft system 3-4 are both mounted in matching holes reserved on the main frame 3-6, the support frame 2-5 is connected to the main frame 3-6, the first shaft system 3-2 A first attenuation plate 3-1 is installed, a second attenuation plate 3-5 is installed on the second shaft system 3-4, a synchronous pulley 3-7 is provided at the power input end of the first shaft system 3-2 and the second shaft system 3-4, a synchronous belt is installed on the synchronous pulley 3-7, an end of the second shaft system 3-4 away from the second attenuation plate 3-5 is connected to the power output end of the second power device, the collimator lens group 1, the variable aperture assembly 4 and the attenuation assembly 5 are adjusted at the component level, and after the adjustment is completed, the collimator lens group 1, the variable aperture assembly 4 and the attenuation assembly 5 are positioned by mechanical stoppers, the model of the synchronous pulley 3-7 is GPA18GT3090-A-P5, the model of the synchronous belt is GBN1473GT-90, and the synchronous belt is connected to two synchronous pulleys 3-7 at the same time.

[0030] The above-mentioned handheld dynamic laser simulation device adopts a compact optical design method. The device is small in size and light in weight, which is convenient for testing in the initial stage of the laser seeker. It provides the laser seeker with a laser target beam with a certain energy and variable spot size to assess the tracking performance of the seeker. The device adopts a synchronous pulley 3-7 for transmission, so that the first attenuation plate 3-1 and the second attenuation plate 3-5 are always in synchronous rotation during the rotation process, so that the attenuation ratio accuracy is increased, and the attenuation ratio error caused by the rotation error of the shaft system is avoided, so that the laser simulation output signal is more accurate and reliable. In addition, the driven gear 2-8 drives the variable iris 2-2 to rotate, and then the iris rod on the variable iris 2-2 rotates to achieve the change in the size of the iris aperture, simulating the spot from far to near, which is equivalent to the laser seeker seeing the target at infinity. The control system of the dynamic laser simulation device controls the fiber laser 6 to emit the laser light source according to the period, and adjusts the change of the target spot size and energy according to the requirements of the ballistic simulation, and controls the fiber laser 6 and the energy simulation to execute the instructions according to the touch screen on the dynamic laser simulation device.

[0031] like Figure 1~Figure 3 As shown, in this embodiment, the collimating lens group 1 includes a lens barrel 1-4 and an adapter flange 1-7, one end of the lens barrel 1-4 is connected to one end of the adapter flange 1-7, and the other end of the lens barrel 1-4 is laterally arranged with a lens pressure ring 1-1, a lens spacer 1-2 and a lens 1-3 in sequence, and the other end of the adapter flange 1-7 is connected to the support frame 2-5, the lens barrel 1-4 and the adapter flange 1-7 are connected by a plurality of screws 1-5, and an adjusting washer 1-6 is also arranged at the connection between the lens barrel 1-4 and the adapter flange 1-7, and gaskets are arranged at the relative positions between the lenses in the collimating lens group 1 to facilitate adjustment, grinding and positioning, the lens barrel 1-4 and the adapter flange 1-7 are connected in the form of a flange stop and in combination with a plurality of screws 1-5 to ensure the docking and installation accuracy between the various components, and the flange fixing method is conducive to ensuring the coaxial requirements of the entire optical path, and at the same time, by adding the adjusting washer 1-6, the thickness of the adjusting washer 1-6 is adjusted by grinding during the adjustment process to meet the axial spacing requirements when the optical path is docked.

[0032] like Figure 1 As shown, in this embodiment, the operating wavelength of the collimator lens group 1 is 1064nm±5nm, the exit pupil diameter of the collimator lens group 1 is 100mm, the field angle of the collimator lens group 1 is ±0.43°, the focal length of the collimator lens group 1 is 300mm, the laser passes through the collimator lens group 1, beam shaping is performed, and then output as parallel light, the operating wavelength of the fiber laser 6 is 1064nm, and the optical pulse width of the fiber laser 6 is 15ns.

[0033] like Figure 1 and Figure 3As shown, in this embodiment, the variable aperture assembly 4 also includes an aperture mounting shaft system 2-1, a homogenizing mirror group 2-4 and a beam expanding lens group 2-10, and the aperture mounting shaft system 2-1, the homogenizing mirror group 2-4 and the beam expanding lens group 2-10 are all mounted on a supporting frame 2-5, and the variable aperture 2-2 is mounted inside the aperture mounting shaft system 2-1, and the supporting frame 2-5 and the aperture mounting shaft system 2-1, the homogenizing mirror group 2-4 and the beam expanding lens group 2-10 are located on the same axis. During the installation process, the variable aperture 2-2 is first installed inside the aperture mounting shaft system 2-1, and then the whole is installed on the stopper of the support frame 2-5. The support frame 2-5 is finely processed with a coaxial stopper, which is coaxially installed with the homogenizer group 2-4, the aperture mounting shaft system 2-1 and the beam expander lens group 2-10 respectively. This can ensure that the homogenizer group 2-4, the beam expander lens group 2-10 and the aperture mounting shaft system 2-1 are coaxial, thereby ensuring that the optical axes are coaxial when docked.

[0034] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the first power device is the first drive motor 2-3, and the variable aperture assembly 4 also includes a drive gear 2-6. The power output end of the first drive motor 2-3 is connected to the drive gear 2-6, and the drive gear 2-6 is meshed with the driven gear 2-8. When the main shaft of the first drive motor 2-3 rotates, it drives the drive gear 2-6 to rotate, and then drives the driven gear 2-8 to rotate, so that the variable aperture 2-2 and the aperture rod on the variable aperture 2-2 rotate to achieve the change of the aperture diameter. The aperture of the variable aperture 2-2 changes continuously in the range of 0~20mm. By changing the aperture diameter of the variable aperture 2-2, that is, the size of the center hole of the variable aperture 2-2, a light spot from far to near is simulated, and the laser guide head is equivalent to being able to see a target infinitely far away.

[0035] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the variable aperture assembly 4 also includes a first photoelectric switch seat 2-7 and a first photoelectric switch 2-9. The first photoelectric switch seats 2-7 arranged in pairs are installed on the driven gear 2-8, and the first photoelectric switches 2-9 arranged in pairs are installed on the supporting frame 2-5. The first photoelectric switch seats 2-7 and the first photoelectric switches 2-9 correspond in position. When the first photoelectric switch seat 2-7 enters the photosensitive area in the middle of the first photoelectric switch 2-9, the first photoelectric switch 2-9 sends a signal to stop the first drive motor 2-3 from rotating, thereby completing the purpose of electrical limiting.

[0036] like Figure 1 and Figure 5As shown, in this embodiment, the attenuation component 5 also includes an optical fiber head 3-3, which is installed on the main frame 3-6. The optical fiber head 3-3 is connected to the optical fiber laser 6 through an optical fiber conductor. The second power device is a second drive motor 3-8. The power output end of the second drive motor 3-8 is connected to the second shaft system 3-4. The main shaft of the second drive motor 3-8 is rigidly connected to the second shaft system 3-4. When the main shaft of the second drive motor 3-8 rotates, it drives the second shaft system 3-4 to rotate, and then drives the synchronous pulley 3-7 on the second shaft system 3-4 to rotate, and then The motion is transmitted to the synchronous pulley 3-7 on the first shaft system 3-2 via the synchronous belt, thereby realizing the synchronous rotation of the first attenuation plate 3-1 and the second attenuation plate 3-5. The advantage of this design is that the first attenuation plate 3-1 and the second attenuation plate 3-5 are always in synchronous rotation during the rotation process, so that the attenuation factor has high accuracy, avoiding the attenuation factor error caused by the shaft system rotation error, and making the laser simulation output signal more accurate and reliable. The laser light source emitted by the fiber laser 6 is emitted from the fiber head 3-3 and irradiated onto the first attenuation plate 3-1 and the second attenuation plate 3-5.

[0037] like Figure 1 and Figure 5 As shown, in this embodiment, the attenuation component 5 also includes a second photoelectric switch seat 3-9 and a second photoelectric switch 3-10. The second photoelectric switch seat 3-9 is installed on the first axis system 3-2, and the second photoelectric switch 3-10 is installed on the main frame 3-6. The second photoelectric switch seat 3-9 and the second photoelectric switch 3-10 correspond in position. When the second photoelectric switch seat 3-9 enters the photosensitive area in the middle of the second photoelectric switch 3-10, the second photoelectric switch seat 3-9 sends a signal to stop the second drive motor 3-8 from rotating, thereby completing the purpose of electrical limiting.

[0038] like Figure 1 and Figure 2 As shown, in this embodiment, the handheld dynamic laser simulation device also includes a handle 2 and an outer cover 3. The outer cover 3 is arranged on the outside of the variable aperture assembly 4 and the attenuation assembly 5, the fiber laser 6 is arranged inside the outer cover 3, the adapter flange 1-7 is connected to the outer cover 3, and the handles 2 arranged in pairs are installed on the outside of the outer cover 3. The outer cover 3 serves as the main frame and skin of the entire device, and plays a role in supporting and protecting the internal optical path and components. The handle 2 makes the device convenient to carry and hold.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the present invention also includes a dynamic laser simulation method, which is implemented based on a handheld dynamic laser simulation device described in any of the above items. The fiber laser 6 provides a semi-physical simulation laser light source for the guide head. The fiber laser 6 emits a laser light source, which is then transmitted to the fiber head 3-3 through an optical fiber conductor. The laser light source is emitted from the fiber head 3-3, and then the laser light source is incident on the first attenuation plate 3-1 and the second attenuation plate 3-5. After attenuation by the first attenuation plate 3-1 and the second attenuation plate 3-5, the laser energy is weakened and becomes a laser that meets the acceptance requirements of the guide head. Energy, the laser light source is emitted from the first attenuation plate 3-1 and the second attenuation plate 3-5 and then enters the beam expanding lens group 2-10. After the laser light source is expanded by the beam expanding lens group 2-10, the laser light source passes through the central hole of the variable aperture 2-2. At the same time, the size of the central hole of the variable aperture 2-2 is changed to change the spot size of the laser light source. Then, the laser light source enters the collimating lens group 1. After refraction by the lenses 1-3 and other lenses in the collimating lens group 1, the laser light beam is accurately shaped into a parallel light beam. Then, the laser light source emitted from the collimating lens group 1 becomes a parallel laser and enters the guide head.

[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A handheld dynamic laser simulation device, characterized in that: The handheld dynamic laser simulation device comprises a collimator lens group (1), a variable aperture assembly (4) and an attenuation assembly (5) which are connected in sequence in a transverse direction. A fiber laser (6) is arranged below the attenuation assembly (5). The variable aperture assembly (4) comprises a variable aperture (2-2), a support frame (2-5) and a driven gear (2-8). The variable aperture (2-2) is mounted on the driven gear (2-8). The driven gear (2-8) is mounted on the support frame (2-5). The driven gear (2-8) is connected to the power output end of the first power device. The attenuation assembly (5) comprises a first shaft system (3-2), a second shaft system (3-4) and a main frame (3-6). The first shaft system (3-2) and the second shaft system (3-4) are both mounted on the main frame (3-6). The support frame (2-5) is connected to the main frame (3-6). The first shaft system (3-2) is mounted with a first gear. The invention relates to a variable aperture assembly (4) comprising an aperture mounting shaft system (2-1), a light averaging lens group (2-4) and a beam expanding lens group (2-10); an attenuation plate (3-1); a second attenuation plate (3-5) is installed on the second shaft system (3-4); a synchronous pulley (3-7) is provided at the power input end of each of the first shaft system (3-2) and the second shaft system (3-4); a synchronous belt is installed on the synchronous pulley (3-7); and the second shaft system (3-4) is connected to the power output end of the second power device; the variable aperture assembly (4) further comprises an aperture mounting shaft system (2-1), a light averaging lens group (2-4) and a beam expanding lens group (2-10); the aperture mounting shaft system (2-1), the light averaging lens group (2-4) and the beam expanding lens group (2-10) are all installed on a supporting frame (2-5); the variable aperture (2-2) is installed inside the aperture mounting shaft system (2-1); and the supporting frame (2-5) and the aperture mounting shaft system (2-1), the light averaging lens group (2-4) and the beam expanding lens group (2-10) are located on the same axis.

2. A handheld dynamic laser simulation device according to claim 1, characterized in that: The collimating lens assembly (1) comprises a lens barrel (1-4) and an adapter flange (1-7); one end of the lens barrel (1-4) is connected to one end of the adapter flange (1-7); a lens pressing ring (1-1), a lens spacer (1-2) and a lens (1-3) are arranged in sequence in a transverse direction inside the other end of the lens barrel (1-4); the other end of the adapter flange (1-7) is connected to a supporting frame (2-5); the lens barrel (1-4) and the adapter flange (1-7) are connected via a plurality of screws (1-5); and an adjusting washer (1-6) is also arranged at the connection between the lens barrel (1-4) and the adapter flange (1-7).

3. A handheld dynamic laser simulation device according to claim 1, characterized in that: The operating wavelength of the collimator lens group (1) is 1064 nm ± 5 nm, the exit pupil diameter of the collimator lens group (1) is 100 mm, the field angle of the collimator lens group (1) is ± 0.43°, the focal length of the collimator lens group (1) is 300 mm, the operating wavelength of the optical fiber laser (6) is 1064 nm, and the optical pulse width of the optical fiber laser (6) is 15 ns.

4. A handheld dynamic laser simulation device according to claim 1, characterized in that: The first power device is a first drive motor (2-3), and the variable aperture assembly (4) further comprises a drive gear (2-6), a power output end of the first drive motor (2-3) is connected to the drive gear (2-6), and the drive gear (2-6) is meshed with a driven gear (2-8).

5. A handheld dynamic laser simulation device according to claim 1, characterized in that: The variable aperture assembly (4) further comprises a first photoelectric switch seat (2-7) and a first photoelectric switch (2-9); the first photoelectric switch seats (2-7) arranged in pairs are mounted on the driven gear (2-8); the first photoelectric switches (2-9) arranged in pairs are mounted on the supporting frame (2-5); the first photoelectric switch seats (2-7) and the first photoelectric switches (2-9) correspond in position to each other.

6. A handheld dynamic laser simulation device according to claim 1, characterized in that: The attenuation component (5) further comprises an optical fiber head (3-3), the optical fiber head (3-3) being mounted on the main frame (3-6), the optical fiber head (3-3) being connected to the optical fiber laser (6) via an optical fiber conductor, the second power device being a second drive motor (3-8), the power output end of the second drive motor (3-8) being connected to the second shaft system (3-4).

7. A handheld dynamic laser simulation device according to claim 1, characterized in that: The attenuation component (5) further comprises a second photoelectric switch seat (3-9) and a second photoelectric switch (3-10); the second photoelectric switch seat (3-9) is mounted on the first shaft system (3-2); the second photoelectric switch (3-10) is mounted on the main frame (3-6); and the second photoelectric switch seat (3-9) and the second photoelectric switch (3-10) correspond in position.

8. A handheld dynamic laser simulation device according to claim 2, characterized in that: The handheld dynamic laser simulation device further comprises a handle (2) and an outer cover (3); the outer cover (3) is arranged outside the variable aperture assembly (4) and the attenuation assembly (5); the optical fiber laser (6) is arranged inside the outer cover (3); the adapter flange (1-7) is connected to the outer cover (3); and the handles (2) arranged in pairs are installed outside the outer cover (3).

9. A dynamic laser simulation method, which is implemented based on a handheld dynamic laser simulation device according to any one of claims 1 to 8, characterized in that: The optical fiber laser (6) emits a laser light source, which is then transmitted to the optical fiber head (3-3) through an optical fiber conductor. The laser light source is emitted from the optical fiber head (3-3), and then the laser light source is incident on the first attenuation plate (3-1) and the second attenuation plate (3-5). The laser light source is emitted from the first attenuation plate (3-1) and the second attenuation plate (3-5), and then is incident on the beam expansion lens group (2-10). After the laser light source is expanded by the beam expansion lens group (2-10), the laser light source passes through the central hole of the variable iris (2-2), and the spot size of the laser light source is changed by changing the size of the central hole of the variable iris (2-2). Then, the laser light source is emitted through the collimating lens group (1).

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