Opto-electric hybrid ultrafast synchronous trigger device and method

Abstract

The application provides an optoelectronic hybrid ultrafast synchronous triggering device and method, which is used for solving the technical problem that the traditional signal detection system is difficult to obtain accurate pulse edge, resulting in that there is large system inherent delay and jitter error in image information acquisition time of ultrafast phenomenon. The optoelectronic hybrid ultrafast synchronous triggering device provided by the application comprises a laser, a reflecting object, a photodetector and a triggering synchronization circuit; the reflecting object is arranged on the surface of a target object and is located on the outgoing light path of the laser, and is used for making the laser incident to the surface of the reflecting object to form reflected light; the target surface of the photodetector is located on the light path of the reflected light, and the reflected light is converted into an electric signal which is adjusted by gain, so as to detect the deformation of the target object; the triggering synchronization circuit is used for responding to the pulse signal output by the photodetector, and providing a triggering signal of a high-speed synchronization reference to a high-speed enhanced visible light framing camera, that is, providing a pulse edge signal of an accurate zero point moment of the deformation of the target object.

Description

Technical Field

[0001] This invention relates to optical systems, and more particularly to a photoelectric hybrid ultrafast synchronous triggering device and method. Background Technology

[0002] A high-speed enhanced visible light split camera splits the imaging beam in space through a front-end optical splitting system, enabling the acquisition of multiple high-quality transient two-dimensional image information. Each image is imaged onto the cathode of a different gated image intensifier. The shutter of the image intensifier is selected by a pulse signal, which sequentially opens the shutter of the image intensifier at different times. The images pass through the selected image intensifiers and enter different image sensors for photosensitive imaging.

[0003] Currently, high-speed enhanced visible light framing cameras are used for the diagnosis of transient plasma physics processes and are an important tool for studying extreme physical phenomena. Primarily used in high-speed photography, these cameras can capture, store, and analyze multiple two-dimensional spatial images of ultrafast reactions and phenomena. Specifically, they are mainly used to acquire dynamic, instantaneous information during ion detonation, capturing the dynamic process of fragmentation, and then retrieving key parameters required for the detonation field, such as the deformation process of fragments and the velocity of plasma particle (electron) beams. This provides accurate experimental data for evaluating the performance and optimizing plasma generation devices.

[0004] High-speed enhanced visible light framing cameras require accurate, stable, and reliable pulse signals as the starting point for event recording during operation. This signal records the zero-point moment of ultrafast reactions and phenomena, which is crucial for analyzing the development of the event process. Existing gating triggers mainly use pulse edges to generate trigger signals, which are only suitable for predictable processes where electrical pulse signals are used as event-driven signals and accompanying events generate electrical pulse signals. In recording phenomena such as high-voltage insulation material breakdown and thermobaric explosive detonation, the accurate zero-point moment of the event is related to parameters such as temperature and pressure. Traditional signal detection systems for capturing the zero-point moment of events struggle to obtain precise pulse edges, leading to significant inherent system delays and jitter errors in acquiring image information of ultrafast phenomena. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problem that traditional signal detection systems have difficulty in obtaining accurate pulse edges, resulting in large inherent system delays and jitter errors in the acquisition time of image information of ultrafast phenomena. The invention provides a photoelectric hybrid ultrafast synchronous triggering device and method.

[0006] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0007] A photoelectric hybrid ultrafast synchronous triggering device is characterized by including a laser, a reflector, a photodetector, and a triggering synchronization circuit.

[0008] The reflector is fixedly set on the surface of the target object and is located in the output light path of the laser. It is used to allow the laser emitted by the laser to be incident on the surface of the reflector to form reflected light, so as to provide real-time feedback on the deformation of the target object.

[0009] The photodetector is an adjustable gain photodetector, whose target surface is set in the optical path of the reflected light, and is used to receive the reflected light and convert the received optical signal into an electrical signal with adjustable gain.

[0010] The first input terminal of the trigger synchronization circuit is connected to the output terminal of the photodetector, and the second input terminal is used to input an external delay signal. This signal is used to perform high-speed comparison, inversion, impedance matching, and drive enhancement on the gain-adjusted electrical signal before delaying it. The output terminal of the trigger synchronization circuit is connected to the input terminal of the high-speed enhanced visible light framing camera and is used to provide a trigger signal for the high-speed synchronization reference to the high-speed enhanced visible light framing camera.

[0011] Furthermore, it also includes secondary reflectors and precision adjustment frames;

[0012] The secondary reflector is located in the optical path of the reflected light and is used for secondary reflection of the reflected light;

[0013] The target surface of the photodetector is positioned in the optical path of the reflected light from the second radial reflection.

[0014] The secondary reflector is mounted on a precision adjustment frame, which is used to adjust the relative position of the secondary reflector and the photodetector by adjusting the precision adjustment frame.

[0015] Furthermore, the size of the incident surface of the reflector is determined according to the area of ​​the incident laser spot, so that more than 86% of the incident laser spot area falls on the surface of the reflector.

[0016] Furthermore, the angle between the laser beam axis emitted by the laser and the normal of the reflector is 10° to 80°;

[0017] The angle between the optical axis of the reflected light and the normal of the secondary reflector is 10° to 80°.

[0018] The lateral distance L1 between the secondary reflector and the reflector is less than 3m;

[0019] The longitudinal distance L2 between the secondary reflector and the photodetector is greater than 25m.

[0020] When the laser emitted by the laser is incident on the surface of the reflector, it is a grazing incidence.

[0021] Furthermore, the reflected light is grazing incidence when it strikes the surface of the secondary reflector.

[0022] Furthermore, the diameter of the emitted laser spot is less than or equal to 2 mm;

[0023] The incident light spot on the surface of the photodetector is less than or equal to 5 mm.

[0024] Furthermore, the surface shape deviation of the reflector is less than or equal to one wavelength, where the wavelength is the wavelength of the light used to detect the surface shape deviation of the reflector;

[0025] The reflectivity of both the reflector and the secondary reflector is greater than or equal to 98%.

[0026] The gain adjustment range of the photodetector is 0-60dB, and the response wavelength is 400nm-900nm.

[0027] The bandwidth of the photodetector is greater than 200MHz.

[0028] Furthermore, the delay signal input to the trigger synchronization circuit is less than 30ns.

[0029] Furthermore, the reflector is fixedly mounted on the surface of the target object using a non-fluid material;

[0030] The photodetector and the trigger synchronization circuit are connected by a 50Ω coaxial cable with a length ≤0.2m;

[0031] The external delay signal and the trigger synchronization circuit are connected by a 50Ω coaxial cable with a length ≤0.2m; the high-speed enhanced visible light framing camera and the trigger synchronization circuit are connected by a 50Ω coaxial cable with a length ≤0.5m.

[0032] This invention also provides a photoelectric hybrid ultrafast synchronous triggering method, which is characterized by including...

[0033] The following steps:

[0034] 1. Construct the aforementioned optoelectronic hybrid ultrafast synchronous triggering device;

[0035] 2. Turn on the laser so that the emitted laser beam is incident on the surface of the reflective object at a set angle;

[0036] 3】Set the selection module of the trigger synchronization circuit to DC mode, and set the delay parameter of all channels to 0; at the same time, set the gain voltage parameter of the photodetector according to the distance between the reflector and the photodetector and the amount of energy received by the photodetector target surface.

[0037] 4】The position, orientation, and lens parameters of the high-speed enhanced visible light framing camera are adjusted using video images acquired from the camera to ensure that the target object is centered in the field of view and presents a clear image;

[0038] 5】Set the selection module of the trigger synchronization circuit to trigger mode, and set the delay parameters of all channels according to the characteristics of the target object; at the same time, set the gain voltage parameters of the photodetector according to the distance between the reflector and the photodetector and the amount of energy received by the photodetector target surface.

[0039] 6. Set the high-speed enhanced visible light framing camera to trigger waiting state. At this time, the high-speed enhanced visible light framing camera receives the trigger signal generated by the synchronous triggering device and records the deformation of the target object.

[0040] The advantages of this invention compared to the prior art are as follows:

[0041] 1. Compared with traditional signal detection systems that capture the zero-point moment of an event, this invention innovatively proposes a photoelectric hybrid ultrafast synchronous triggering device. First, a reflector is placed on the surface of the target object. The deformation of the target object is fed back in real time by incident laser light onto the surface of the reflector. At the same time, a photodetector detects the reflected light passing through the surface of the reflector to achieve real-time detection of the deformation of the target object. Then, the triggering synchronization circuit responds to the pulse signal output by the photodetector, which can provide an accurate zero-point moment pulse edge signal of the deformation of the target object for a high-speed enhanced visible light framing camera.

[0042] 2. The photoelectric hybrid ultrafast synchronous triggering device provided by the present invention can realize ultrafast response and phenomenon capture over long distances, and has the inherent characteristics of short delay, convenient installation and reliable performance, and is suitable for measurement in a variety of high-speed scenarios.

[0043] 3. The photoelectric hybrid ultrafast synchronous triggering device provided by the present invention provides a secondary reflector in addition to the reflector, which is beneficial to placing the laser, photodetector and trigger synchronization circuit in the same spatial location.

[0044] 4. The photoelectric hybrid ultrafast synchronous triggering device provided by the present invention has a grazing incidence when the laser emitted from the laser is incident on the surface of the reflector, and a grazing incidence when the reflected light is incident on the surface of the secondary reflector, which can make the entire system more sensitive to the deformation triggering of the target object.

[0045] 5. Based on the above-mentioned optoelectronic hybrid ultrafast synchronous triggering device, the optoelectronic hybrid ultrafast synchronous triggering method provided by the present invention is simple to operate and highly practical, and can provide a high-speed enhanced visible light framing camera with an accurate zero-point pulse edge signal of the deformation of the target object. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of a first embodiment of the photoelectric hybrid ultrafast synchronous triggering device of the present invention;

[0047] Figure 2 This is a timing diagram of a first embodiment of the photoelectric hybrid ultrafast synchronous triggering device of the present invention;

[0048] Figure 3 This is a schematic diagram of a second embodiment of the photoelectric hybrid ultrafast synchronous triggering device of the present invention (the triggering synchronization circuit and the high-speed enhanced visible light framing camera are not shown).

[0049] The specific reference numerals in the attached figures are as follows:

[0050] 1-High-speed enhanced visible light framing camera; 2-Laser; 3-Reflector; 4-Photodetector; 5-Trigger synchronization circuit; 6-Secondary reflector. Detailed Implementation

[0051] To make the advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] like Figure 1 As shown, an optoelectronic hybrid ultrafast synchronization triggering device is used to provide a high-speed synchronization reference trigger signal to different types of high-speed enhanced visible light framing cameras 1. It includes a laser 2, a reflector 3, a photodetector 4, and a trigger synchronization circuit 5.

[0053] Based on the working distance between the target object and the high-speed enhanced visible light framing camera 1 and the atmospheric environment, the output function of laser 2 is estimated at 60% of its detectable performance. Simultaneously, a suitable wavelength laser 2 is selected as the light source to ensure sufficient laser transmission distance to meet testing requirements. Preferably, this invention selects a laser with a wavelength of 532nm or 635nm, and the laser emission spot diameter is less than or equal to 2mm, with a laser power greater than 20mW. Furthermore, a dedicated fixing structure is required for laser 2, ensuring both good heat dissipation and stable output laser direction. In this embodiment, the angle between the laser axis emitted by laser 2 and the normal to the reflector 3 is 10°–80°.

[0054] Reflector 3 is positioned in the output light path of laser 2. The output light from laser 2 is incident on the surface of reflector 3 and reflected by the surface of reflector 3 to form reflected light, which is used to provide real-time feedback on the deformation of the target object. Specifically, a suitable reflector 3 is selected based on the output laser wavelength of laser 2. Furthermore, based on the characteristics of the target object, reflector 3 is either fixed to the surface of the target object or to the surface of the mounting device for the target object. During fixing, a high-rigidity adhesive, such as a non-fluid material, is used to fix reflector 3 to the surface of the target object or the mounting device for the target object. After fixing, it is necessary to ensure that reflector 3 and the fixed surface are in close contact in terms of distance and space.

[0055] To ensure that over 98% of the laser energy incident on the surface of reflector 3 is reflected, reflector 3 can employ a multi-layer reflective coating. Simultaneously, the angle between the laser axis emitted from laser 2 and the normal to reflector 3 is 10°–80°. The surface of reflector 3 should be as flat as possible to accurately reflect the incident laser onto the target surface of photodetector 4; preferably, the surface shape deviation of reflector 3 is less than or equal to 1λ, i.e., the surface flatness of reflector 3 is less than or equal to 1λ. For example, when using red light 630 to determine the surface flatness of reflector 3, λ represents the wavelength of red light 630. Furthermore, the size of reflector 3 is determined based on the size of the incident laser spot, ensuring that over 86% of the incident laser spot area falls on the surface of reflector 3, thus avoiding excessive incident laser light falling onto the target object surface and affecting the detection of the target object. The photoelectric hybrid synchronous controller compares the input signal of the photodetector with the internal threshold, and after gain amplification and impedance matching, its signal input port can respond to various types of electrical pulse signals, providing accurate event zero-point pulse edge signals for high-speed enhanced visible light framing cameras.

[0056] The target surface of photodetector 4 is positioned in the optical path of the reflected light to receive the incident reflected light. Because the laser beam incident on the target surface of photodetector 4 shifts after the target object deforms, a falling edge is constantly generated at the output of photodetector 4, enabling real-time detection of the target object's deformation. In this invention, photodetector 4 is configured as an adjustable-gain photodetector to convert the received optical signal into a gain-adjustable electrical signal, and to amplify and match the signal. Preferably, a photodetector with a gain adjustment range of 0-60dB and a response wavelength of 400nm-900nm is selected. Different gain levels are selected at different distances to effectively extend the dynamic response range of the system. Specifically, the gain parameter of photodetector 4 is set according to the energy received by the target surface to adjust the amplification gain, ensuring that the output signal level is ≥5V, thus providing an effective trigger level for the subsequent trigger synchronization circuit. Furthermore, a high-bandwidth photodetector with a bandwidth greater than 200MHz is preferred, which not only improves the system's response speed but also helps to shorten the system delay.

[0057] The trigger synchronization circuit 5 is used to respond to the falling edge pulse signal generated by the photodetector 4, and to provide the high-speed enhanced visible light framing camera 1 with an accurate zero-point pulse edge signal of the deformation of the target object.

[0058] Specifically, the first input terminal of the trigger synchronization circuit 5 is connected to the output terminal of the photodetector 4, and the second input terminal is connected to an external delay signal. This signal is used to perform high-speed comparison, inversion, impedance matching, and drive enhancement on the electrical signal after gain adjustment by the photodetector 4, and then delay it according to design requirements. Preferably, the input delay of this invention is a low delay, preferably less than 30ns. Typically, the output signal of the trigger synchronization circuit 5 is set to 8 TTL channels (OUTPUT1~OUTPUT8), but this invention usually only uses two of them. One channel is connected to the input terminal of the high-speed enhanced visible light framing camera 1, used to send the delayed signal to the external trigger port of the high-speed enhanced visible light framing camera 1 to trigger it. The other channel is connected to an external light source, used to supplement the illumination of the high-speed enhanced visible light framing camera 1 when the light is insufficient. The remaining channels are reserved for use when multiple high-speed enhanced visible light framing cameras 1 are needed or when connecting other devices.

[0059] To reduce the delay time in the circuit system, the length of the coaxial cable needs to be as short as possible. Preferably, a 50Ω coaxial cable with a length ≤0.2m is used to connect the photodetector 4 and the trigger synchronization circuit 5. A 50Ω coaxial cable with a length ≤0.2m is used to connect the external delay signal source and the trigger synchronization circuit 5. A 50Ω coaxial cable with a length ≤0.5m is used to connect the high-speed enhanced visible light framing camera 1 and the trigger synchronization circuit 5.

[0060] To accommodate the spatial arrangement of the equipment, the high-speed enhanced visible light framing camera 1 is positioned as the main component, while the laser 2, photodetector 4, and trigger synchronization circuit 5 are positioned as subordinate components, ensuring the acquisition of clear target images under steady-state conditions. Simultaneously, to reduce the impact of electromagnetic interference, the laser 2, photodetector 4, trigger synchronization circuit 5, and high-speed enhanced visible light framing camera 1 are all grounded. The timing diagram of the photoelectric hybrid ultrafast synchronous triggering device of this invention is as follows: Figure 2 As shown in the diagram. Here, "0" represents no change in the signal on the surface of reflector 3, and "1" represents a change in the signal. T1 represents the inherent delay time from the moment the event occurs to the output of the trigger synchronization circuit 5; T2 represents the delay time after the event occurs, when the laser signal reaches the input of the trigger synchronization circuit 5 via the photodetector 4; and T3 represents the delay time generated by the trigger synchronization circuit 5.

[0061] Based on the above-mentioned optoelectronic hybrid ultrafast synchronization triggering device, the present invention also provides an optoelectronic hybrid ultrafast synchronization triggering method, which specifically includes the following steps:

[0062] 1】Build the above-mentioned optoelectronic hybrid ultrafast synchronous triggering device.

[0063] 2. Turn on the laser 2 so that the laser emitted from the laser 2 is incident on the surface of the reflector 3 at a set angle, and is reflected by the reflector 3 to the target surface of the photodetector 4, and ensure that the laser spot incident on the target surface of the photodetector 4 can fall completely into the target surface of the photodetector 4.

[0064] 3】Set the selection module of the trigger synchronization circuit 5 to DC mode, and set the delay parameters of all channels to 0; at the same time, set the gain voltage parameters of the photodetector 4 according to the distance between the reflector 3 and the photodetector 4 and the amount of energy received by the photodetector target surface.

[0065] 4】The position, orientation, and lens parameters of the high-speed enhanced visible light framing camera 1 are adjusted using the video images acquired by the camera to ensure that the target object is located in the center of the field of view and presents a clear image.

[0066] 5. Set the selection module of the trigger synchronization circuit 5 to trigger mode, and set the delay parameters of all channels according to the characteristics of the target object (e.g., detonation time of tens of microseconds, balloon explosion time of tens of millimeters). Set the gain voltage parameters of the photodetector 4 according to the distance between the reflector 3 and the photodetector 4 and the amount of energy received by the photodetector target surface.

[0067] 6】Set the high-speed enhanced visible light framing camera 1 to the trigger waiting state. At this time, the high-speed enhanced visible light framing camera 1 receives the trigger signal generated by the synchronous triggering device 5 and records the deformation of the target object.

[0068] Example 2

[0069] In practical applications, to position the laser 2, photodetector 4, and trigger synchronization circuit 5 in the same spatial location, this embodiment also includes a secondary reflector 6 and a precision adjustment frame for fixing the secondary reflector 6. The precision adjustment frame is used to adjust the relative positions of the secondary reflector 6 and the photodetector 4. By adjusting the relative positions of the secondary reflector 6 and the photodetector 4, the secondary reflected light is incident on the target surface of the photodetector 4. The specific optical path system is as follows: Figure 3 As shown, the laser emitted by the laser 2 passes through the reflector 3 in sequence to form reflected light. The secondary reflector 6 is located in the optical path of the reflected light and is used to perform secondary reflection of the reflected light to form secondary reflected light. The target surface of the photodetector 4 is set in the optical path of the secondary reflected light and is used to receive the secondary reflected light and convert the received optical signal into an electrical signal with gain adjustment.

[0070] In this embodiment, the angle between the laser beam axis emitted by laser 2 and the normal of reflector 3 is 10° to 80°. By adjusting the relative positions of laser 2 and reflector 3, the incident angle of the laser beam is ensured. The secondary reflector 6 is positioned approximately 2-2.5m from reflector 3, preferably 2m in this embodiment, which effectively reduces the inherent delay of the overall system. The angle between the reflected light beam axis of reflector 3 and the normal of secondary reflector 6 is 10° to 80°, preferably grazing incidence, which makes the entire system more sensitive to deformation triggering of the target object. Since the laser beam is affected by interference from the surrounding environment during transmission, the beam spot will diffuse. To ensure the effectiveness and reliability of the system's trigger signal, the incident beam spot on the target surface of photodetector 4 must be less than or equal to 5mm, preferably 2mm in diameter, which effectively reduces the probability of false triggering.

[0071] During the adjustment process, the spatial stability of the secondary reflector 6 and reflector 2 is crucial. Therefore, in real-time adjustment, the lateral distance L1 between the secondary reflector 6 and reflector 3 must be less than 3m. Simultaneously, to ensure the safety of the lens of the high-speed enhanced visible light framing camera 1, the laser 2, photodetector 4, trigger synchronization circuit 5, and high-speed enhanced visible light framing camera need to be placed at a considerable distance during spatial arrangement. This requires the longitudinal distance L2 between the secondary reflector 6 and photodetector 4 to be greater than 25m, ensuring the acquisition of a clear target image under steady-state conditions.

[0072] The above description is only used to illustrate the technical solutions of the present invention, and is not intended to limit them. For those skilled in the art, modifications can be made to the specific technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions protected by the present invention.

Claims

1. A photoelectric hybrid ultrafast synchronous triggering device, characterized in that: It includes a laser (2), a reflector (3), a photodetector (4), a trigger synchronization circuit (5), a secondary reflector (6), and a precision adjustment frame; The reflector (3) is fixedly set on the surface of the target object and is located in the output light path of the laser (2). It is used to make the laser emitted by the laser (2) incident on the surface of the reflector (3) to form reflected light, so as to provide real-time feedback on the deformation of the target object. The secondary reflector (6) is located in the optical path of the reflected light and is used to perform secondary reflection of the reflected light; The photodetector (4) is an adjustable gain photodetector, whose target surface is set in the optical path of the reflected light after secondary reflection, and is used to receive the reflected light after secondary reflection and convert the received optical signal into an electrical signal with adjustable gain. The first input terminal of the trigger synchronization circuit (5) is connected to the output terminal of the photodetector (4), and the second input terminal is used to input an external delay signal. This signal is used to perform high-speed comparison, inversion, impedance matching, and drive enhancement on the gain-adjusted electrical signal before delaying it. The output terminal of the trigger synchronization circuit (5) is connected to the input terminal of the high-speed enhanced visible light framing camera (1) and is used to provide a high-speed synchronization reference trigger signal to the high-speed enhanced visible light framing camera (1). The secondary reflector (6) is mounted on a precision adjustment frame and is used to adjust the relative position of the secondary reflector (6) and the photodetector (4) by adjusting the precision adjustment frame.

2. The photoelectric hybrid ultrafast synchronous triggering device according to claim 1, characterized in that: The size of the surface of the reflector (3) to be incident is determined according to the area of ​​the incident laser spot, so that more than 86% of the incident laser spot area falls on the surface of the reflector (3).

3. The photoelectric hybrid ultrafast synchronous triggering device according to claim 2, characterized in that: The angle between the laser beam axis emitted by the laser (2) and the normal of the reflector (3) is 10°~80°; The angle between the optical axis of the reflected light and the normal of the secondary reflector (6) is 10°~80°; The lateral distance L1 between the secondary reflector (6) and the reflector (3) is less than 3m; The longitudinal distance L2 between the secondary reflector (6) and the photodetector (4) is greater than 25m.

4. The photoelectric hybrid ultrafast synchronous triggering device according to claim 3, characterized in that: When the laser emitted by the laser (2) is incident on the surface of the reflector (3), it is a grazing incidence. The reflected light is grazing incidence when it is incident on the surface of the secondary reflector (6).

5. A photoelectric hybrid ultrafast synchronous triggering device according to any one of claims 1-4, characterized in that: The diameter of the emitted light spot of the laser (2) is less than or equal to 2 mm; The incident light spot on the surface of the photodetector (4) is less than or equal to 5 mm.

6. The photoelectric hybrid ultrafast synchronous triggering device according to claim 5, characterized in that: The surface shape deviation of the reflector (3) is less than or equal to one wavelength; The reflectivity of both the reflector (3) and the secondary reflector (6) is greater than or equal to 98%. The gain adjustment range of the photodetector (4) is 0-60dB, and the response band is 400nm-900nm; The bandwidth of the photodetector (4) is greater than 200MHz.

7. The photoelectric hybrid ultrafast synchronous triggering device according to claim 6, characterized in that: The delay signal input to the trigger synchronization circuit (5) is less than 30ns.

8. The photoelectric hybrid ultrafast synchronous triggering device according to claim 7, characterized in that: The reflector (3) is fixedly mounted on the surface of the target object using a non-fluid material; The photodetector (4) and the trigger synchronization circuit (5) are connected by a 50Ω coaxial cable with a length ≤0.2m; The external delay signal and the trigger synchronization circuit (5) are connected by a 50Ω coaxial cable with a length ≤0.2m; The high-speed enhanced visible light framing camera (1) and the trigger synchronization circuit (5) are connected by a 50Ω coaxial cable with a length ≤0.5m.

9. A photoelectric hybrid ultrafast synchronous triggering method, characterized in that, Includes the following steps: 1) Construct a photoelectric hybrid ultrafast synchronous triggering device as described in any one of claims 1-8; 2】Turn on the laser (2) so that the laser emitted from the laser (2) is incident on the surface of the reflector (3) at a set angle, and is reflected by the reflector (3) to the target surface of the photodetector (4), and ensure that the laser spot incident on the target surface of the photodetector (4) can fall completely into the target surface of the photodetector (4). 3】Set the selection module of the trigger synchronization circuit (5) to DC mode, and set the delay parameters of all channels to 0; at the same time, set the gain voltage parameters of the photodetector (4) according to the distance between the reflector (3) and the photodetector (4) and the amount of energy received by the photodetector target surface. 4】The position, orientation and lens parameters of the high-speed enhanced visible light framing camera (1) are adjusted by using the video image acquired by the high-speed enhanced visible light framing camera (1) so that the target object is located in the center of the field of view and presents a clear image; 5】Set the selection module of the trigger synchronization circuit (5) to trigger mode, and set the delay parameters of all channels according to the characteristics of the target object; at the same time, set the gain voltage parameters of the photodetector (4) according to the distance between the reflector (3) and the photodetector (4) and the amount of energy received by the photodetector target surface. 6】Set the high-speed enhanced visible light framing camera (1) to the trigger waiting state. At this time, the high-speed enhanced visible light framing camera (1) receives the trigger signal generated by the trigger synchronization circuit (5) and records the deformation of the target object.

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